WO2015079964A1

WO2015079964A1 - Manufacturing device for absorbent body

Info

Publication number: WO2015079964A1
Application number: PCT/JP2014/080427
Authority: WO
Inventors: 松永　竜二; 祐貴塚本; 晃央森田
Original assignee: 花王株式会社
Priority date: 2013-11-29
Filing date: 2014-11-18
Publication date: 2015-06-04

Abstract

This manufacturing device (10) for an absorbent body (3) comprises: a rotary drum (2) that has an accumulation recess (22) on the outer circumferential surface (21) thereof; and a duct (4) that supplies a molding material in a scattered state. The following are arranged in the interior of the duct (4): a scuffing roll (42) that scrapes off molding material that has accumulated within a space (4S) that is partitioned by a suspended plate (43); and a duct opening (44) that takes in external air on the downstream side. The interior of the duct (4) is divided by the suspended plate (43) into an accumulation area (PT) in which molding material in a scattered state is made to accumulate in an excessive manner so as to overflow from the accumulation recess (22) upstream from the suspended plate (43) and a re-accumulation area (RPT) in which accumulated excess molding material is scraped off by the scuffing roll (42) and made to accumulate again downstream from the suspended plate (43).

Description

Absorber manufacturing equipment

The present invention relates to an absorber manufacturing apparatus.

In the case of using an absorber having a middle-high portion with an increased thickness in the center as an absorbent used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc. There is. As a manufacturing method of an absorbent body having such a middle-high portion, for example,

Patent Documents

1 and 2 use a fiber stacking apparatus including a rotating drum having a deeper middle-high portion concave portion in the outer circumferential surface of the concave portion for accumulation. A method is described.

In Patent Document 1, a fiber material is supplied in a scattered state to the outer peripheral surface of the rotating drum using a duct, and an excess portion overflowing from the concave portion for collecting the rotating drum is scraped off with a scuffing roll disposed on the downstream side. A fiber stacking apparatus is described in which the scraped fiber material is supplied again to the upstream side of the duct via a conveyance path different from the duct. According to the fiber stacking apparatus described in Patent Document 1, an excess portion of the overflowing fiber material can be reused, so that the fiber can be efficiently stacked.

Further, in Patent Document 2, fibers other than the fiber material supplied at the upstream side of the stacking drum with the fiber material supplied by the first duct and stacked by the scuffing roll into the middle-high section recess in the stacking recess. A two-stage product that scrapes the material and feeds the fiber material onto the fiber material stacked in the middle-high portion concave portion by the second duct at the position downstream of the pile drum, and causes the fiber to accumulate in the accumulation concave portion. A fiber device is described.

Further, Patent Document 3 includes a pair of stacking plates at a position upstream of the stacking drum, and by adjusting the angle of the pair of stacking plates, the stacking recesses disposed on the outer peripheral surface of the stacking drum are arranged. There is described a fiber stacking device capable of adjusting the basis weight of the fiber material supplied to the inner middle-high portion recess.

JP 2010-35701 A Special table 2006-500155 gazette JP 2007-260297 A

However, Patent Document 1 does not describe anything regarding the point at which the fiber material scraped off by the scuffing roll is easily peeled off from the protrusion of the scuffing roll. Moreover, in the rotating drum of the fiber stacking apparatus described in Patent Document 1, the scraped fiber material is simply supplied again to the upstream side of the duct via a conveyance path different from the duct. For this reason, the suction force of the rotating drum decreases as the pulp accumulation thickness increases, and the outer surface of the piled portion corresponding to the middle-high portion concave portion in the stacking concave portion is not the middle-high portion concave portion. In some cases, it is difficult to produce an absorbent body having a desired basis weight with a medium to high portion.

Further, in the rotary drum of the fiber stacking apparatus described in Patent Document 1, the suction force of the rotary drum decreases as the pulp accumulation thickness increases. When the outer surface of the part is in a depressed state compared to the outer surface of the stacking part corresponding to the concave part for accumulation other than the concave part for the middle and high part, and it is difficult to manufacture the absorbent body having the desired middle weight part of the basis weight was there.

Also, Patent Document 2 does not describe anything about making it easy to peel the fiber material scraped off by the scuffing roll from the protrusion of the scuffing roll. Further, in the fiber stacking apparatus described in Patent Document 2, since the fiber material is first stacked in the mid-high portion recess, the fiber material is stacked in the stacking recess other than the mid-high portion recess. As the thickness increases, the suction force of the rotating drum decreases. Therefore, similarly to the fiber stacking device described in Patent Document 1, the outer surface of the fiber stack portion corresponding to the concave portions for the middle and high portions in the concave portion for accumulation is in a depressed state, and the absorption provided with the middle and high portions having a desired basis weight. It was difficult to manufacture the body.

Further, in the fiber stacking apparatus described in Patent Document 2, since the fiber material is first stacked in the mid-high portion recess, the fiber material is stacked in the stacking recess other than the mid-high portion recess. As the thickness increases, the suction force of the rotating drum decreases. Therefore, similarly to the fiber stacking device described in Patent Document 1, the outer surface of the fiber stack portion corresponding to the concave portions for the middle and high portions in the concave portion for accumulation is in a depressed state, and the absorption provided with the middle and high portions having a desired basis weight. It was difficult to manufacture the body.

Moreover, in the fiber stacking apparatus described in Patent Document 3, the outer surface of the fiber stacking part corresponding to the middle and high part recesses of the stacking recesses in the rotating drum and the other than the middle and high part recesses by the pair of stacking plates. It was necessary to adjust each time whether or not the outer surface of the pile portion corresponding to the concave portion for accumulation had the same height, and the operation was complicated. Moreover, in the fiber stacking apparatus described in Patent Document 3, since the pulp is brought to the center corresponding to the space between the pair of stacking plates on the outer surface of the rotating drum by the stacking plate, A lot of pulp was piled up at the center, and it was difficult to process an absorber with a high basis weight ratio.

Therefore, this invention is providing the manufacturing apparatus of the absorber which can eliminate the fault which the prior art mentioned above has.

The present invention (first invention) includes a rotating drum having an accumulation concave portion on an outer peripheral surface, and a duct for supplying a molded material in a scattered state toward the outer peripheral surface of the rotating drum, The present invention relates to an absorbent body manufacturing apparatus for forming an absorbent body by stacking the molded body material in the accumulation concave portion by an air flow generated by suction from the inside. The accumulation recess has a first region and a second region having a depth deeper than the first region, and the inside of the duct extends from the top surface of the duct to the downstream side in the rotation direction of the rotating drum. A scuffing roll that is disposed in a space partitioned by a hanging plate that hangs down so that the surface is in contact with the molded body material and scrapes off an excessive amount of the molded body material that has been stacked, and the scuffing roll more than the scuffing roll. A duct opening disposed on the downstream side in the rotational direction of the rotating drum and taking in outside air. The inside of the duct is upstream of the hanging plate in the rotation direction of the rotary drum, and the fiber stacking region for excessively stacking the scattered molded body material so as to overflow from the accumulation recess, The downstream side of the rotating drum with respect to the rotating drum with respect to the drooping plate, the excess amount of the formed body material scraped off is scraped off by the scuffing roll, and the scraped-off shaped body material is put into the accumulation recess. It is divided by the drooping plate into a restacked fiber region to be restacked.

The present invention (second invention) includes a rotating drum having a concave portion for accumulation on an outer peripheral surface, and a duct for supplying a molded material in a scattered state toward the outer peripheral surface of the rotating drum. The present invention relates to an absorbent body manufacturing apparatus for forming an absorbent body by stacking the molded body material in the accumulation concave portion by an air flow generated by suction from the inside. The accumulation recess has a first region and a second region deeper than the first region, and is disposed inside the duct on both sides along the circumferential direction of the rotating drum. And a scuffing roll disposed so as to come into contact with the molded body material and scraping off an excessive amount of the molded body material that has been stacked. The pair of partition plates are arranged so that the molded material in a scattered state is excessively stacked so as to overflow from the accumulation recesses into a corresponding region between the pair of partition plates in the accumulation recesses. The pair of partition plates are arranged with an interval between them. The scuffing roll scrapes off an excessive amount of the molding material deposited in a corresponding region between the pair of partition plates, and the scraped molding material is excessively stacked in the accumulation recess. It arrange | positions in the position spaced apart to the rotation direction downstream of the said rotating drum from a pair of said partition plate so that it may restack on the both sides of the made part.

Further, in the present invention (second invention), a compact material is supplied in a scattered state toward the outer peripheral surface of the rotary drum to a rotary drum having an accumulation recess on the outer peripheral surface, and the compact material is collected. The present invention relates to a method for manufacturing an absorbent body that includes a fiber-splitting step for stacking in a concave portion for use. In the stacking step, the pair of partition plates are used to excessively stack the scattered molded body material so as to overflow into a corresponding region between the pair of partition plates in the accumulation recess. In the manufacturing method of the absorbent body of the present invention (second invention), after the fiber stacking step, the excessively stacked molded body material is scraped off, and the scraped molded body material is excessively added to the accumulation recess. A restacking step of restacking on both sides of the piled portion;

FIG. 1 is a schematic perspective view showing one embodiment (this embodiment) of an absorbent body manufacturing apparatus according to the present invention (first invention). FIG. 2 is a diagram in which the outer peripheral portion (recess for accumulation) of the rotating drum in the manufacturing apparatus shown in FIG. FIG. 3 is an exploded perspective view of the outer peripheral portion of the rotary drum shown in FIG. 4 is a cross-sectional view schematically showing a cross section taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view schematically showing a part of FIG. 6 is a cross-sectional view schematically showing a cross section taken along line VI-VI of FIG. FIG. 7 is a cross-sectional view schematically showing a part of FIG. FIG. 8 is a perspective view showing the piled product released from the accumulation recess of the rotating drum in the manufacturing apparatus shown in FIG. 1.

FIG. 9: is a schematic perspective view which shows one Embodiment (this embodiment) of the manufacturing apparatus of the absorber of this invention (2nd invention). FIG. 10 is a diagram in which the outer peripheral portion (recess for accumulation) of the rotating drum in the manufacturing apparatus shown in FIG. 9 is developed in a planar shape. FIG. 11 is an exploded perspective view of the outer periphery of the rotating drum shown in FIG. 12 is a cross-sectional view schematically showing a cross section taken along line IV-IV in FIG. FIG. 13 is a cross-sectional view schematically showing a part of FIG. 14 is a cross-sectional view schematically showing a cross section taken along line VI-VI in FIG. FIG. 15 is a cross-sectional view schematically showing a part of FIG. FIG. 16 is a perspective view showing the piled product released from the accumulation recess of the rotating drum in the manufacturing apparatus shown in FIG. 9. FIG. 17 is an exploded perspective view of the outer peripheral portion of the rotating drum in the absorbent body manufacturing apparatus according to another embodiment of the present invention (second invention).

Detailed Description of the Invention

Hereinafter, the present invention (first invention) will be described based on preferred embodiments with reference to the drawings.
FIG. 1 shows an outline of a fiber stacking apparatus which is a preferred embodiment of the absorbent body manufacturing apparatus of the present invention (first invention). The fiber stacking apparatus 1 according to the present embodiment includes a rotating drum 2 having a stacking recess 22 on an outer peripheral surface 21 and a duct 4 that supplies a compact material to the outer peripheral surface 21 of the rotating drum 2 in a scattered state. Then, the absorbent body 3 is manufactured by forming the absorbent body 3 by stacking the molded body material into the accumulation recess 22 by the air flow generated by the suction from the inside of the rotary drum 2. The accumulation recess 22 has a first region and a second region deeper than the first region. In the fiber stacking apparatus 1 of the present embodiment, the second region of the stacking recess 22 is a middle-high recess 23 that is deeper than the stacking recess 22 disposed in the central region of the stacking recess 22 as shown in FIG. It is formed with. The first region of the accumulation recess 22 is formed by the accumulation recess 22 excluding the middle-high recess 23 in the central region. That is, the fiber stacking apparatus 1 according to the present embodiment includes the rotating drum 2 having the accumulation recess 22 on the outer peripheral surface 21 and the middle / high recess 23 deeper than the accumulation recess 22 in the central region of the accumulation recess 22. , And a duct 4 that supplies the molded body material in a scattered state toward the outer peripheral surface 21 of the rotary drum 2. More specifically, the fiber stacking device 1 is disposed below the rotary drum 2 that is rotationally driven in the direction of the arrow R 2, the duct 4 that supplies a molding material to the outer peripheral surface 21 of the rotary drum 2, and the diagonally lower side of the rotary drum 2. , A transfer roll 5 that is rotationally driven in the direction of the arrow R5, a vacuum conveyor 6 disposed below the transfer roll 5, and a cutting device 7. In the fiber stacking apparatus 1, a vacuum box 11 is further provided between the duct 4 and the transfer roll 5 in the circumferential direction of the rotary drum 2, and a mesh belt 13 is provided between the vacuum box 11 and the rotary drum 2. The windbreak plate 15 is provided close to the outer peripheral surface of the transfer roll 5 so as to pass between the transfer roll 5 and the rotary drum 2. In addition, from the viewpoint of stably transferring the piled material in the accumulation recess 22 without losing its shape, the pile device 1 of the present embodiment is provided with the vacuum box 11 and the wind shield plate 15. It does not have to be. As shown in FIG. 1, the rotation direction of the rotary drum 2 is a rotation direction in an arrow R2 direction that is opposite to the conveyance direction of a core wrap sheet 37 described later, and the rotation direction of the transfer roll 5 is the core direction. The rotation direction is the arrow R5 direction which is the forward direction with respect to the conveyance direction of the wrap sheet 37.

As shown in FIG. 1, the rotating drum 2 has a cylindrical shape, and a part that forms the outer peripheral surface 21 of the rotating drum 2 rotates around a horizontal axis by receiving power from a motor such as a motor. As shown in FIG. 2, the rotary drum 2 has an accumulation recess 22 in which a molded body material is stacked on the outer peripheral surface 21, and further, the width direction (2Y direction) of the rotation drum 2 in the accumulation recess 22. ), And has a middle-high recess 23 deeper than the stacking recess 22. A plurality of stacking recesses 22 including the middle-high recesses 23 are formed at predetermined intervals in the circumferential direction (2X direction) of the rotary drum 2. In FIG. 2, the 2X direction is the circumferential direction of the rotating drum 2, and the 2Y direction is the width direction of the rotating drum 2 (a direction parallel to the rotation axis of the rotating drum 2).

As shown in FIG. 3, in the fiber stacking apparatus 1 of the present embodiment, the rotary drum 2 is overlapped with a cylindrical drum body (not shown) made of a metal rigid body and an outer peripheral portion of the drum body. The fixed suction adjusting plate 24, the medium / high porous plate 25 (porous member) fixed to be overlapped on the outer surface 24a side of the suction adjusting plate 24, and the outer surface 25a side of the medium / high porous plate 25 are overlapped. A fixed space plate 26, a porous plate 27 (porous member) fixed to be overlapped on the outer surface 26a side of the space plate 26, and a concave portion fixed to be overlapped on the outer surface 27a side of the porous plate 27 It has a partition plate 28 and a ring plate 29 which is fixed in an overlapping manner on the outer surface 28 a side of the recessed partition plate 28. The rotary drum 2 is formed by fixing the drum body and the plates 24 to 29 to each other by a known fixing means such as a bolt or an adhesive. Here, as shown in FIG. 2 and FIG. 3, the bottom surface 23 a of the middle-high recess 23, which is the fiber surface on which the molded body material is deposited, is composed of a medium-high porous plate 25 (porous member) having a number of suction holes. Has been. More specifically, the bottom surface 22a of the concave portion 22 for accumulation, which is a fiber surface to be stacked with the molded body material, is composed of a porous plate 27 except for the concave portion 23 for middle and high portions. .

In the present specification, the outer surface of each component of the rotary drum 2 (the suction adjustment plate 24, the medium / high porous plate 25, the space plate 26, the porous plate 27, the recessed section plate 28, the ring plate 29, etc.) The surface of the component member is directed to the supply side of the molded body material when the molded body material is stacked. In addition, the inner surface of each constituent member is a surface directed to the side opposite to the supply side of the molding material (the inner side of the rotating drum) when the molding material is stacked in the constituent member. . When the molded object manufactured with the fiber accumulation apparatus 1 is an absorber used for absorbent articles, such as a disposable diaper and a sanitary napkin, a molded object material is an absorber raw material.

The molded body material includes a fiber material. As the molded body material as the absorbent material, various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers such as defibrated pulp, short fibers of cellulosic fibers such as rayon fibers and cotton fibers, and short fibers of synthetic fibers such as polyethylene are used. These fiber materials can be used alone or in combination of two or more. In addition, the molded body material as the absorbent material may use a water-absorbing polymer together with the fiber material. Further, as the fibrous raw material, a fibrous water-absorbing polymer can be used alone or together with the fibrous material. Furthermore, a deodorant, an antibacterial agent, etc. can also be used with a fiber material etc. as needed.

The ring plate 29 is a member whose outer surface 29 a is located on the outermost side of the rotary drum 2 and forms a part of the outer peripheral surface 21, and is also a member that forms the outer peripheral surface of the accumulation recess 22. Here, the “outer peripheral surface of the accumulation concave portion 22” means that the accumulation concave portion 22 is viewed from the outside in the normal direction of the outer peripheral surface of the rotary drum 2 (direction perpendicular to the rotation axis direction of the rotary drum 2). It means the outer surface along the outline of the concave portion 22 for accumulation. Hereinafter, in the present specification, viewing the object such as the accumulation recess 22 from the outside in the normal direction of the outer peripheral surface of the rotary drum 2 is referred to as a plan view of the object such as the accumulation recess 22. In the fiber stacking apparatus 1 of the present embodiment, the stacking recess 22 has a rectangular outline that is long in the transport direction when the stacking recess 22 is viewed in plan view. The ring plates 29 are arranged on both sides of the rotary drum 2 and are formed to extend with the same width over the entire circumference of the rotary drum 2. Each ring plate 29 is formed to have a constant thickness.

In the ring plate 29 formed as described above, the width between the pair of

ring plates

29 and 29 determines the width of the accumulation recess 22, and the thickness of the ring plate 29 determines the depth of the accumulation recess 22. One of the factors to be determined. The pair of

ring plates

29 and 29 are non-breathable so as not to allow air to pass except for a portion between them. Here, “non-breathable” includes both the meanings of “non-breathable that does not allow air to pass through” and “non-breathable that allows a very small amount of air to pass but does not substantially pass air”. It means non-breathable. As the ring plate 29, for example, a plate or mold in which an opening (a space corresponding to the three-dimensional shape in the recess 22) is formed by machining a metal or resin plate such as stainless steel or aluminum or the like. It is possible to use a plate in which the opening is integrally formed, a punched or etched plate, or a laminate of these plates.

The concave partition plate 28 includes a plurality of cross-shaped openings 281 penetrating in the thickness direction in plan view, a cross-shaped opening defining member 282 that partitions each cross-shaped opening 281, and the thickness direction. And a plurality of openings 283 penetrating through the openings 283 and an opening defining part 284 that partitions each opening 283. A plurality of cross-shaped openings 281 are intermittently arranged in the circumferential direction (2X direction). More specifically, the opening defining member 282 has a width direction (2Y) from both side edges in a portion extending in a strip shape in the transport direction at regular intervals in a plan view and a substantially central portion in the transport direction of the portion extending in the transport direction. Direction) shaped like a cross having an outwardly convex part. More specifically, the front and rear ends in the conveyance direction in the portion extending in the conveyance direction constituting the cross-shaped opening defining member 282 are formed in an arc shape that is curved outwardly. In addition, the pair of width-direction (2Y direction) convex portions that form the cross-shaped opening defining member 282 are trapezoidal in which the interval gradually decreases outward in the width direction (2Y direction). Is formed. The opening 281 is located in the cross-shaped opening defining member 282 and is formed in a cross shape having the same contour as the opening defining member 282. The opening defining portion 284 includes a plurality of MD defining members 285 extending in parallel to the transport direction in a region excluding the plurality of cross-shaped openings 281 (cross-shaped opening defining members 282) in plan view. And a plurality of CD defining members 286 extending parallel to the width direction (2Y direction) (extending in the direction perpendicular to the transport direction). The opening defining portion 284 is formed in a lattice shape by intersecting a plurality of MD defining members 285 and a plurality of CD defining members 286, and each opening portion 283 has an opening in the lattice shape. It is located in the part of the grid | lattice in the partial definition part 284, and is formed in the shape which has the same outline as each opening part definition part 284. FIG.

The cross-shaped opening defining member 282 and the opening defining portion 284 having the MD defining member 285 and the CD defining member 286 have air permeability that prevents air from passing therethrough. The “non-breathable” here is as described above. As a material for forming the non-breathable

opening defining members

282 and 284, metals such as stainless steel, aluminum, and iron, resins, or a combination thereof can be used. The plurality of cross-shaped openings 281 and the plurality of openings 283 included in the recess partition plate 28 are arranged in a region sandwiched between a pair of

ring plates

29 and 29 that are fixed over the outer surface 28a of the recess partition plate 28. Has been. The cross-shaped opening defining member 282 and the lattice-shaped opening defining member 284 constituting the concave partition plate 28 are formed to have a constant thickness. Similar to the thickness of the ring plate 29, the thickness of the concave section plate 28 is also one of the factors that determine the depth of the concave section 22 for accumulation.

The porous plate 27 has a plurality of cross-shaped openings 271 in plan view. The cross-shaped opening 271 of the porous plate 27 is disposed at the same position as each cross-shaped opening 281 of the recessed section partition plate 28 fixed to be overlapped with the outer surface 27 a of the porous plate 27. The plurality of cross-shaped openings 271 of the porous plate 27 and the plurality of cross-shaped openings 281 of the recessed partition plate 28 correspond one-to-one, and the shapes in plan view are similar to each other. . In the fiber stacking apparatus 1 of the present embodiment, the cross-shaped opening 271 of the porous plate 27 has a similarity ratio of 1 to the cross-shaped opening 281 of the corresponding concave partition plate 28, and the opening 271 and the opening 271 are open. The portion 281 has a congruent relationship in shape in plan view.

The porous plate 27 is a member that forms the bottom surface 22a of the accumulation recess 22 excluding the middle / high recess 23. The porous plate 27 transmits an air flow (vacuum air) generated by suction from the inner side of the fiber stacking apparatus 1 (inward of the rotating drum 2) to the duct 4 covering the rotating drum 2, and the air flow is transmitted to the air flow. It is a breathable plate that holds the molded body material carried on board without allowing it to permeate and allows only air to permeate. In the porous plate 27, a plurality of (multiple) suction holes (pores) penetrating the plate 27 in the thickness direction are formed in a region excluding the plurality of cross-shaped openings 271; While the accumulation recess 22 passes through the space maintained at a negative pressure in the rotary drum 2, the suction hole functions as an air flow permeation hole. As the porous plate 27, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

The space plate 26 includes, in plan view, an annular defining member 261 formed along the outline of each cross-shaped opening 271 of the porous plate 27 fixed to be overlapped with the outer surface 26a of the space plate 26, and a conveyance A plurality of MD defining members 262 extending in parallel with the direction and a plurality of CD defining members 263 extending in parallel with the width direction (2Y direction) (extending in the direction perpendicular to the transport direction) are provided. The MD defining member 262 and the CD defining member 263 not only intersect with each other, but also intersect with the annular defining member 261 to form a lattice shape. In the region surrounded by the annular defining member 261, the space plate 26 is positioned at the grid portion where the MD defining member 262 and the CD defining member 263 intersect, and is formed in a plurality of annular shapes penetrating in the thickness direction. An inner opening 264 is provided. In addition, in the region excluding the annular defining member 261, the space plate 26 is located at the grid portion where the MD defining member 262 and the CD defining member 263 intersect, and has a plurality of openings penetrating in the thickness direction. Part 265.

As described above, the annular defining member 261 of the space plate 26 is formed along the outline of each cross-shaped opening 271 of the porous plate 27 fixed to be overlapped with the outer surface 26a of the space plate 26. The plurality of annular defining members 261 of the space plate 26 and the outlines of the plurality of cross-shaped openings 271 of the porous plate 27 have a one-to-one correspondence, and the shapes in plan view are similar to each other. In the fiber stacking apparatus 1 of the present embodiment, the plurality of annular defining members 261 of the space plate 26 has a similarity ratio of 1 to the contour of the cross-shaped opening 271 of the corresponding porous plate 27. Therefore, the annular defining member 261 includes not only the outline of the opening 271 of the porous plate 27 but also the cross-shaped opening 281 of the recessed partition plate 28 that has a congruent relationship with the opening 271 of the porous plate 27. The shape of the opening defining member 282 to be defined also has a congruent relationship in shape in plan view. In addition, although it is preferable that it is mutually agree | coinciding that it is mutually congruent, it is the meaning also including the case where a magnitude | size differs a little.

The plurality of openings 265 of the space plate 26 correspond one-to-one with the plurality of openings 283 of the concave partition plate 28 fixed on the outer surface 2a of the space plate 26 via the porous plate 27. The planar view shapes are similar to each other. In the fiber stacking apparatus 1 of the present embodiment, the opening portion 265 of the space plate 26 has a similarity ratio of 1 to the opening portion 283 of the corresponding recessed section partition plate 28, and the opening portion 265 and the opening portion 283 are viewed in plan view. The shapes are congruent with each other. The annular defining member 261, the MD defining member 262, and the CD defining member 263 constituting the space plate 26 are formed with a constant thickness. The thickness of the space plate 26 is one of the factors that determine the depth of the middle-high recess 23 in the central region of the accumulation recess 22.

The annular defining member 261, the MD defining member 262, and the CD defining member 263 of the space plate 26 are non-breathable so as not to allow air to pass therethrough. The “non-breathable” here is as described above. As a forming material of the non-breathable annular defining member 261, the MD defining member 262, and the CD defining member 263, it is possible to use a metal such as stainless steel, aluminum, iron, or a resin, or a combination thereof. it can.

A plurality of the medium-high porous plates 25 are arranged in a plan view and are formed in a cross shape. Each cross-shaped medium / high porous plate 25 is disposed at the same position as each annular defining member 261 of the space plate 26 fixed to be overlapped on the outer surface 25 a of the medium / high porous plate 25. The outlines of the plurality of cross-shaped medium-high porous plates 25 and the plurality of annular defining members 261 of the space plate 26 have a one-to-one correspondence, and the shapes in plan view are similar to each other. In the fiber stacking apparatus 1 according to the present embodiment, the cross-shaped medium-to-high porous plate 25 has a similarity ratio of 1 to the annular defining member 261 of the corresponding space plate 26. Therefore, the cross-shaped porous plate 25 for medium and high is not only congruent in its outline with the annular defining member 261, but also its entire shape is the opening 271 of the porous plate 27 and the concave partition plate 28. These cross-shaped openings 281 also have a congruent relationship in plan view.

The medium / high porous plate 25 is a member that forms the bottom surface 23 a of the medium / high recess 23. Like the porous plate 27, the medium / high porous plate 25 covers the rotary drum 2 with an air flow (vacuum air) generated by suction from the inside of the fiber stacking device 1 (inward of the rotary drum 2). It is a breathable plate that transmits the air inside the duct 4 and carries the molded body material carried on the air flow without transmitting it, and allows only air to pass through. A plurality of (multiple) suction holes (pores) that penetrate through the plate 25 in the thickness direction are formed in the middle / high porous plate 25 in a uniform distribution. While passing through the space maintained at a negative pressure in the rotary drum 2, the suction hole functions as an air flow permeation hole. As the medium / high porous plate 25, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

The suction adjustment plate 24 includes, in plan view, an annular defining member 241 formed along the contour of the cross-shaped medium-to-high porous plate 25 that is overlapped and fixed to the outer surface 24a of the suction adjustment plate 24, and the conveyance direction. And a plurality of CD defining members 243 extending in parallel to the width direction (2Y direction) (extending in a direction perpendicular to the conveying direction). The MD defining member 242 and the CD defining member 243 not only intersect with each other but also intersect with the annular defining member 241 to form a lattice shape. In the region surrounded by the annular defining member 241, the suction adjusting plate 24 is positioned at the grid portion where the MD defining member 242 and the CD defining member 243 intersect, and a plurality of suction adjusting plates 24 penetrates in the thickness direction. An annular inner opening 244 is provided. The plurality of annular inner openings 244 of the suction adjustment plate 24 is different from the plurality of annular inner openings 264 of the space plate 26 fixed on the outer surface 24a of the suction adjustment plate 24 via the medium / high porous plate 25. They correspond to each other, and the shapes in plan view are similar to each other. In the fiber stacking device 1 of the present embodiment, the annular inner opening 244 of the suction adjustment plate 24 has a similarity ratio of 1 to the corresponding annular inner opening 264 of the space plate 26, and the annular inner opening 244 and the annular inner opening 244 are similar to each other. The opening 264 has a congruent relationship in shape in plan view.

In the region excluding the annular defining member 241, the suction adjusting plate 24 is located at the grid portion where the MD defining member 242 and the CD defining member 243 intersect and has a plurality of openings that penetrate in the thickness direction. H.245. The plurality of openings 245 of the suction adjustment plate 24 have a one-to-one correspondence with the plurality of openings 265 of the space plate 26 fixed on the outer surface 24a of the suction adjustment plate 24 via the medium / high porous plate 25. The planar view shapes are similar to each other. In the fiber stacking apparatus 1 of the present embodiment, the opening ratio 245 of the suction adjustment plate 24 has a similarity ratio with respect to the opening section 265 of the corresponding space plate 26 smaller than 1, and the relative ratio is 0.05 or more and 0.5 or less. It is preferable that That is, the opening area of the opening 245 of the suction adjustment plate 24 is narrower than the opening area of the opening 265 of the space plate 26. The ratio (S2 / S1) of the opening area (S2) to the opening area (S1) of the opening 265 of the space plate 26 is preferably 50% or more and 5% or less (5% or more). 50% or less), more preferably 15% or more and 7% or less (7% or more and 15% or less).

The annular defining member 241, the MD defining member 242, and the CD defining member 243 constituting the suction adjusting plate 24 are formed to have a constant thickness. The annular defining member 241, the MD defining member 242, and the CD defining member 243 of the suction adjustment plate 24 have a non-breathability that prevents air from passing therethrough. The “non-breathable” here is as described above. As a forming material of the non-breathable annular defining member 241, the MD defining member 242, and the CD defining member 243, a metal such as stainless steel, aluminum, iron or the like, a resin, or a combination thereof may be used. it can.

The rotary drum 2 includes a suction adjusting plate 24 configured as described above, a plurality of medium / high porous plates 25, a space plate 26, a porous plate 27, a recessed section plate 28, and a pair of ring plates 29. Are fixed to each other. As shown in FIG. 2, the rotary drum 2 provided in the fiber stack device 1 of the present embodiment configured as described above has an adjustment body 20 that adjusts the suction force on the inner surface side of the porous member of the accumulation recess 22. Is disposed on the inner surface of the porous member. The adjusting body 20 has a plurality of openings penetrating the adjusting body 20 in the thickness direction, and a part of the opening is relative to the opening relatively far from the porous member of the accumulation recess 20. The opening area is smaller than the closest opening. The adjusting member 20 for adjusting the suction force is not disposed on the inner surface side of the porous member of the middle-high recess 23, and the suction holes (pores) of the porous member have an opening area on the outer surface side and an inner surface side. The opening area is the same. Specifically, the opening area of the opening disposed on the outer surface side of the porous member of the middle-high recess 23 and the opening area of the opening disposed on the inner surface side of the porous member are the same. This will be specifically described below.

As shown in FIG. 2, the middle-high concave portion 23 formed on the outer surface 21 of the rotary drum 2 has a contour in the form of an annular defining member 241 of the suction adjustment plate 24, and the middle-high concave portion 23. The contour of the porous plate 25, the annular defining member 261 of the space plate 26, the contour of the opening 271 of the porous plate 27, and the position of the opening defining member 282 of the recessed partition plate 28 coincide to form a cross shape. Is formed. Further, the middle / high recess 23 for the accumulation 22 has a bottom surface 23a formed of a medium / high porous plate 25 (porous member), and a region in the middle / high recess 23 is seen in a plan view as shown in FIG. Thus, the positions and shapes of the plurality of annular inner openings 244 of the suction adjustment plate 24 sandwiching the medium-to-high porous plate 25 and the plurality of annular inner openings 264 of the space plate 26 are the same. As described above, only the suction adjusting plate 24 is disposed on the inner side of the rotary drum 2 than the medium-high porous plate 25 (porous member) constituting the bottom surface 23a of the medium-high recess 23, and the medium-high porous The opening area of the annular inner opening 264 of the space plate 26 disposed on the outer surface side of the porous plate 25 and the opening area of the annular inner opening 244 of the suction adjustment plate 24 disposed on the inner surface side of the medium / high porosity plate 25 Are the same. Therefore, the adjusting body 20 for adjusting the suction force is not disposed on the inner surface side of the middle / high porous plate 25 in the middle / high recess 23 in the accumulation recess 22. Further, as shown in FIG. 4, the depth of the middle / high recess 23 for the stacking recess 22 is such that the thickness of the space plate 26 disposed on the medium / high porous plate 25, the thickness of the recess partition plate 28, and The ring plate 29 is formed with a thickness.

The stacking recess 22 formed on the outer surface 21 of the rotary drum 2 is formed in a band shape with its outline sandwiched between a pair of

rectangular ring plates

29 and 29 as seen in plan view as shown in FIG. ing. In addition, the bottom 22a of the region excluding the middle / high recess 23 is formed of a porous plate 27 (porous member), and in the region excluding the middle / high recess 23, as shown in FIG. Thus, the positions and shapes of the plurality of openings 283 of the concave section partition plate 28 and the plurality of openings 265 of the space plate 26 match, and the positions of the

openings

283 and 265 are closer to the center than their opening areas. An opening 245 of the narrow suction adjustment plate 24 is also arranged. That is, the opening area of the opening 245 of the suction adjustment plate 24 is narrower than the opening area of each of the opening 283 of the recessed partition plate 28 and the opening 265 of the space plate 26. Thus, the space plate 26 and the suction adjustment plate 24 are located inward of the rotary drum 2 rather than the porous plate 27 (porous member) that constitutes the bottom surface 22a of the region excluding the middle-high concave portion 23. The opening area 245 of the suction adjustment plate 24 that is relatively far from the porous plate 27 (porous member) is compared with the opening 265 of the space plate 26 that is relatively close to the opening area 265. Therefore, the adjusting body 20 for adjusting the suction force is arranged on the inner surface side of the porous plate 27 (porous member) in the accumulation recess 22. Further, as shown in FIG. 4, the stacking recesses 22 (excluding the mid-high recesses 23) have the depths of the thickness of the recess partition plate 28 disposed on the porous plate 27 and the thickness of the ring plate 29. Will be formed.

When the adjusting body 20 having a small opening area is disposed on the inner surface side of the porous plate 27 (porous member) in the accumulation recess 22, the medium / high porosity plate 25 for the medium / high recess 23. Compared to the case where the adjustment body 20 having a large opening area is disposed as on the inner surface side of the (porous member), the air flow for sucking the molded body material through the porous member by suction from the inside of the apparatus (Vacuum air) is suppressed. That is, as shown in FIG. 5, the air flow (indicated by an arrow in FIG. 5) flowing from the outside of the rotating drum 2 to the inside through the porous plate 27 is caused by the adjusting body 20 at the bottom of the recess 22. In the disposed region, the components pass through the rotary drum 2 in the order of the porous plate 27, the opening 265 of the space plate 26, and the opening 245 of the suction adjustment plate 24. At that time, the air flow is located leeward of the air flow, and the opening 245 of the suction adjusting plate 24 that substantially functions as a suction portion for the molded body material is more upwind of the air flow than the opening 245. Since the opening area is smaller than the opening 265 of the space plate 26 positioned, the air permeability through the porous plate 27 is hindered, and the air volume of the air flow can be suppressed.

In addition, in the fiber-filing process in which the compact material supplied on the air flow is sucked into the accumulation recess 22 and stacked, the basis weight of the compact material depends on the amount of air flowing through the porous member. Therefore, by arranging the adjusting body 20 in a region corresponding to a portion on the inner surface side of the porous member corresponding to a portion where the basis weight of the formed material to be stacked is smaller than that of the other portion, the basis weight of the desired portion can be obtained. A compact with a reduced amount can be produced with simple equipment. That is, since the adjustment body 20 is arranged on the inner surface side in the region excluding the middle and high recesses 23 for the stacking recesses 22, it becomes a low basis weight pile fiber region. Since the adjustment body 20 is not arranged on the side, it becomes a high basis weight pile fiber region.

The fiber stacking apparatus 1 according to the present embodiment will be further described. As shown in FIG. 1, the rotary drum 2 has a plurality of partitioned spaces in its interior (portion on the rotating shaft side). There is a suction force adjusting means for adjusting the force. Specifically, the rotating drum 2 is formed so that the inner side (rotating shaft side) portion does not rotate from the portion forming the outer peripheral surface 21, and a disc shape is formed at both ends in the width direction of the rotating drum 2. The fixed

plates

291 and 291 and a cylindrical central shaft portion 292 connecting the fixed

plates

291 and 291 are provided. The fixing

plates

291 and 291 and the central shaft portion 292 are made of a metal rigid body and are integrally formed. Inside the rotating drum 2, a plurality of metal plates 293 are arranged between the

fixed plates

291, 291 from the outer peripheral surface of the central shaft portion 292 toward the outer peripheral surface 21, In the apparatus 1, four pieces are arranged. Each plate 293 extends from the outer peripheral surface of the central shaft portion 292 to the outer peripheral edge of each fixed plate 291. Spaces A, B, C, and D that are partitioned by four plates 293 and separated from each other by plates 293 adjacent to each other in the circumferential direction (2X direction) of the rotating drum 2 inside the rotating drum 2. Is formed. An intake fan (not shown) is connected to the central shaft portion 292, and the pressure in the independent spaces A to D can be adjusted by driving the intake fan. In the fiber stacking device 1, the space A and the space B are maintained at a negative pressure.

As shown in FIGS. 1 and 6, the space A and the space B are located in a region where the outer peripheral surface 21 is covered with the duct 4. The plate 293 that partitions the space A and the space B extends toward the vicinity of the tip of the hanging plate 43 that hangs down from the top surface of the duct 4 to be described later. The negative pressure in the space B is set to a negative pressure that is the same or weaker than the negative pressure in the space A, and is set to a negative pressure that is weaker than the negative pressure in the space A in the fiber stacking apparatus 1. FIG. 6 shows a state in which the fixed plate 291 is removed for the explanation of the space A and the space B inside the rotary drum 2.

The remaining spaces C and D of the rotary drum 2 are set to atmospheric pressure (zero pressure). External air flows into the space C by suction from the vacuum box 11 side, which will be described later, and external air flows into the space D by suction from the transfer roll 5 side. The space C is separated from the space D, which is a region after the transfer, in order to satisfactorily perform transfer on the space C (transfer of the piled material in the accumulation recess 22 to the transfer roll 5 and the like). The rotary drum 2 is blown (air flow) from the inside of the rotary drum 2 toward the porous plate 27 in a space (space C) corresponding to the transfer position of the piled material in the accumulation recess 22 to the transfer roll 5. ) Generating means may be included. In that case, by actively blowing from the space C toward the vacuum box 11 using the generating means, it is possible to promote the release of the piled articles from the accumulation concave portion 22.

The space C is normally set to a negative pressure or zero pressure (atmospheric pressure) that is weaker than the space B. From the viewpoint of transportability of the piled product, the space C is set to a weak negative pressure until the piled product in the stacking recess 22 is transferred to the transfer recess 5 until the piled product is transferred to the transfer roll 5. However, if there is no particular problem in transportability, the space C is preferably zero pressure in consideration of transferability. Moreover, since the space D is a region through which the accumulation concave portion 22 passes after the piled material in the accumulation concave portion 22 is transferred onto the transfer roll 5, zero pressure or positive pressure is preferable.

As shown in FIG. 1, one end of the duct 4 is located on the space A and the space B of the rotating drum 2 and covers the outer peripheral surface 21 of the rotating drum 2 over the entire area of the space A and the space B. The other end side (not shown) has a molding material introduction device (not shown). The molded body material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into the duct 4. A water-absorbing polymer introduction part for introducing water-absorbing polymer particles in the middle of the duct 4 can also be provided.

The individual recesses 22 for accumulation of the rotary drum 2 pass through the porous plate 27 and the medium / high porous plate 25 constituting the bottom surfaces 22a and 23a described above while passing over the space A maintained at a negative pressure. Then suction from the suction part is performed. By suction from the pores of the porous material in each accumulation recess 22, an air flow is generated in the duct 4 to convey the raw material of the absorber to the outer peripheral surface of the rotary drum 2, and the air is carried on the air flow. The raw material is deposited in each accumulation recess 22.

In the fiber stacking apparatus 1 of the present embodiment, as shown in FIG. 1, in the inside of the duct 4 corresponding to the space A on the upstream side in the rotation direction (R2 direction) of the rotary drum 2 from the hanging plate 43 described later, A pair of

partition plates

41 and 41 are provided on both sides along the circumferential direction (2X direction) of the rotating drum 2. Further, in the inside of the duct 4, an excessive amount of formed fibers is stacked at a position separated from the

partition plates

41, 41 arranged along the both side portions along the downstream side in the rotation direction (R2 direction) of the rotary drum 2. A scuffing roll 42 for scraping body material is provided.

The pair of

partition plates

41 and 41 extend along both side portions along the circumferential direction (2X direction) of the rotary drum 2. More specifically, the pair of

partition plates

41, 41 are arranged inside the duct 4 between the rotary drum 2 and a molding material introducing device (not shown) on the other end side of the duct 4, and It is arranged on a pair of

ring plates

29, 29 that form the outer peripheral surface 21, and extends in the circumferential direction (2X direction) along the ring plate 29. Further, in the drum width direction (2Y direction), each partition plate 41 is arranged on the rotary drum 2 across the ring plate 29 from each side wall 40 constituting the duct 4 in a cross-sectional view as shown in FIG. The stacking concave portion 22 extends to a position covering the side portion along the circumferential direction (2X direction). More specifically, each partition plate 41 extends from each side wall 40 constituting the duct 4 over the ring plate 29 to the circumferential direction (2X in the middle-high recess 23 in the central region of the stacking recess 22 disposed in the rotary drum 2. Extending to the vicinity of the side edge along the direction). The pair of

partition plates

41, 41 may be plate-like ones extending in parallel to the drum width direction (2Y direction) as long as they extend to such a position. It is preferable that it has a surface inclined so that a space | interval may become narrow gradually toward the rotating drum 2 from the molded object material introduction apparatus (not shown) side of the other end side. If the pair of

partition plates

41, 41 has such an inclined surface, it becomes difficult for the molded body material to accumulate on the partition plate 41.

As shown in FIG. 1 and FIG. 4, each partition plate 41 has a substantially right-angled triangular cross section or an upper base at the lower base, as shown in FIGS. 1 and 4. Compared to the trapezoidal trapezoidal shape, the trapezoidal section is extremely narrow. The pair of square pyramid shaped

partition plates

41, 41 have mutually facing surfaces facing each other from the molding material introducing device (not shown) side on the other end side of the duct 4 toward the rotary drum 2. The distance between the

end portions

41a, 41a on the rotary drum 2 side of the pair of

partition plates

41, 41 is equal to the width of the middle-high recess 23 in the central region of the accumulation recess 22. I'm doing it. As a forming material of such a partition plate 41, a metal, a synthetic resin, or a material combining them can be used.

1 and 6, the fiber stacking apparatus 1 according to the present embodiment is partitioned by a hanging plate 43 that hangs down from the top surface of the duct 4 on the downstream side in the rotational direction 2X of the rotating drum 2 inside the duct 4. A scuffing roll 42 is disposed in the space 4S so that the surface contacts the molded material deposited in the accumulation recess 22 and scrapes off an excessive amount of the molded material that has been stacked, and the scuffing roll 42 And a duct opening 44 that is disposed downstream of the rotary drum 2 in the rotational direction 2X and takes in outside air. Specifically, the duct 4 includes a hanging plate 43 that hangs from the top surface of the duct 4 toward the vicinity of the outer end of the plate 293 that partitions the space A and the space B inside the duct 4. . The hanging plate 43 is formed in a convex arc shape from the top surface of the duct 4 toward the upstream side in the circumferential direction (2X direction) of the rotating drum 2 over the entire width of the duct 4. The tip of the hanging plate 43 hangs down to a position where it does not touch the top of an excessive amount of molded material that has been piled up so as to overflow. By arranging such a hanging plate 43, a space 4 S partitioned by the hanging plate 43 is formed inside the duct 4. When such a hanging plate 43 is arranged, the piled area (the area where the defibrated molded material is piled on the surface of the rotating drum 2) and the restacked area (the scuffing 42 are scraped off). The region in which the formed body material is restacked) is divided, and it is difficult to inhibit the forming material in the stacked region. Scuffing rolls 42 are arranged in the space 4S thus partitioned.

As shown in FIGS. 1 and 6, the scuffing roll 42 is arranged on the downstream side of the space B of the rotary drum 2 in the space 4 S inside the duct 4 and on the outer peripheral surface 21 of the rotary drum 2. The material is arranged so as to come into contact with the molded body material. The scuffing roll 42 has a cylindrical roll main body 421 and a large number of scraping protrusions 422 erected on the outer peripheral surface of the roll main body 421. In the drum width direction (2Y direction), the scuffing roll 42 has a roll main body 421 disposed on the rotary drum 2 between a pair of

ring plates

29, 29, and a large number of protrusions 422 at least in the accumulation recesses. 22 is preferably disposed in a region on the middle-high recess 23 in the central region, and is preferably disposed in a region between the pair of

ring plates

29 and 29, and is disposed over the entire width of the rotary drum 2. It is particularly preferred that In the fiber stacking apparatus 1 of the present embodiment, the roll main body 421 and a large number of protrusions 422 are arranged on the rotating drum 2 between the

ring plates

29 and 29. The scuffing roll 42 scrapes off an excessive amount of the molded body material that is piled up so as to overflow in the accumulation recess 22 by the protrusions 422. As a material for forming the protrusions 422, a metal such as stainless steel, aluminum, or iron, or a synthetic resin is used. In the fiber stacking apparatus 1 of this embodiment, a synthetic resin brush is used. The height of the protrusion 422 can be appropriately set according to the amount of the molded material to be scraped, but in the fiber stacking apparatus 1 of the present embodiment, the outer surface of the ring plate 29 that forms the outermost surface of the rotating drum 2. The height is set up to 29a. Specifically, the height of the protrusion 422 is preferably about 1 mm to 10 mm from the peripheral surface of the roll body 421 of the scuffing roll 42.

The scuffing roll 42 receives power from a motor such as a motor and rotates around the horizontal axis. In the fiber stacking apparatus 1 of the present embodiment, the scuffing roll 42 is rotationally driven in the direction of the arrow R3, and rotates so that the surface facing the rotating drum 2 moves in the direction opposite to the rotating direction of the rotating drum 2. is doing. That is, in the fiber stacking apparatus 1 of this embodiment, the rotation directions of the scuffing roll 42 and the rotary drum 2 are the same. The peripheral speed of the scuffing roll 42 is 2 in comparison with the peripheral speed of the rotary drum 2 from the viewpoint of the balance between the amount of scraping of the molded body material and restacking of the scraped molded body material in the near field. It is preferably from 10 times to 10 times, more preferably from 3 times to 5 times. That is, when the peripheral speed of the scuffing roll 42 is higher than the peripheral speed of the rotary drum 2 as described above, an excessive amount of the molded material is stacked so that the protrusions 422 of the scuffing roll 42 overflow in the accumulation recess 22. The excessive number of molding materials in the accumulation recesses 22 excluding the middle and high recesses 23 can be scraped evenly. The peripheral speed of the scuffing roll 42 means the peripheral speed on the surface of the roll body 421, and the peripheral speed of the rotating drum 2 means the peripheral speed on the surface of the ring plate 29 that forms the outer peripheral surface 21 of the rotating drum 2. To do.

As described above, as shown in FIG. 1 and FIG. 6, the duct 4 is provided with a duct opening 44 for taking in outside air downstream of the scuffing roll 42 in the rotational direction 2X. In the fiber stacking apparatus 1 of the embodiment, the duct opening 44 is formed at the outlet located in the downstream side 2X in the rotational direction 2X of the rotary drum 2 in the duct 4. That is, the outlet of the duct 4 is opened to form the duct opening 44. Further, the duct opening 44 has an outside air amount adjusting means for adjusting the opening area to adjust the amount of outside air to be taken in. In the fiber stacking apparatus 1 of the embodiment, a closing plate 441 for closing the lower rotary drum 2 side is disposed in the duct opening 44 at the outlet of the duct 4. The closing plate 441 is arranged over the entire width of the duct opening 44 of the duct 4, that is, between both

side walls

40, 40 constituting the duct 4, and rotates from the top surface side of the duct 4 of the duct opening 44. It is formed so as to be movable toward the drum 2, and by moving it, the position of the duct opening 44 can be adjusted, and the amount of outside air taken into the gap between the top surface of the duct 4 and the scuffing roll can be adjusted. ing. In addition, by changing the size of the closing plate 441, the opening area of the duct opening 44 can be adjusted to adjust the amount of outside air.

More specifically, the individual concave portions 22 for accumulation of the rotary drum 2 constitute the aforementioned bottom surfaces 22a and 23a while passing over the space B that is located in the space 4S of the duct 4 and maintained at a negative pressure. Suction from the suction part is performed through the porous plate 27 and the medium / high porous plate 25. Therefore, outside air is taken into the space 4 S of the duct 4 from the duct opening 44. And the opening area of the duct opening 44 is adjusted by the closing plate 441, and the amount of the outside air taken in the duct opening 44 is adjusted.

As shown in FIG. 6, in a state where the compacted molding material is piled in the accumulation recess 22, the molding material scraped off by the scuffing roll 42 is easily peeled off from the protrusion 422 of the scuffing roll 42. The flow velocity (V1) of the outside air taken in from the duct opening 44 flowing between the scuffing roll 42 and the top surface of the duct 4 was taken in from the duct opening 44 flowing between the scuffing roll 42 and the rotating drum 2. It is preferably faster than the outside air flow rate (V2). The ratio (V1 / V2) of the flow rate (V1) of the outside air to the flow rate (V2) of the outside air is preferably 1 or more and 4 or less, and 1.5 or more and 3 times or less from the viewpoint of further achieving the above effect. More preferably it is. Specifically, the flow velocity (V1) of the outside air between the scuffing roll 42 and the top surface of the duct 4 is preferably 5 m / s or more and 100 m / s or less, and preferably 10 m / s or more and 70 m / s or less. More preferably. The flow rate (V2) of the outside air between the scuffing roll 42 and the rotary drum 2 is preferably 0.1 m / s or more and 70 m / s or less, and more preferably 0.1 m / s or more and 50 m / s or less. preferable. The flow rate of outside air can be measured by an anemometer such as Anemo Master. From the viewpoint of achieving such a flow rate, the duct opening 44 opened at the outlet of the duct 4 is preferably provided at a position on the top surface side of the duct 4 with respect to the height of the duct 4. . More preferably, the duct opening 44 is preferably provided above the rotating drum 2 with respect to the rotating shaft of the scuffing roll 42.

In the fiber stacking device 1 of the present embodiment having the rotating drum 2 and the duct 4 configured as described above, the inside of the duct 4 is upstream of the hanging plate 43 in the rotational direction 2X of the rotating drum 4, An accumulation amount PT in which the molded material in a scattered state is excessively accumulated so as to overflow from the accumulation concave portion 22, and an excess amount that is accumulated on the downstream side of the hanging plate 43 in the rotational direction 2X of the rotary drum 4. The shaped body material is scraped off by a scuffing roll 42 and is divided by a hanging plate 43 into a restacking region RPT in which the scraped shaped body material is restacked in the accumulation recess 22. The fiber stacking apparatus 1 according to the present embodiment has an excessive fiber stacking so that the molded material in the scattered state overflows from the accumulation recess 22 in the duct 4 on the upstream side 2X in the rotational direction of the rotary drum 4 with respect to the hanging plate 43. In this device, an excessive amount of the molded body material that has been spun and scraped is scraped off by a scuffing roll 42, and the molded body material scraped in the partitioned space 4S is restacked into the accumulation recess 22. Furthermore, the fiber stacking apparatus 1 of the present embodiment causes the molded material in a scattered state to overflow in a corresponding region between the pair of

partition plates

41 and 41 in the accumulation recess 22 by the pair of

partition plates

41 and 41. The excessively formed compact material is scraped off by a scuffing roll 42, and the compact material scraped off in the partitioned space 4S is excessively stacked in the accumulation recess 22. It is a device that re-fibers the fiber on both sides of the fiber part. The transfer roll 5, the vacuum conveyor 6, the cutting device 7 and the like that the fiber stacking device 1 has in addition to the rotating drum 2 and the duct 4 will be described below.

The transfer roll 5 has a cylindrical outer peripheral portion having air permeability, and the outer peripheral portion rotates around a horizontal axis upon receiving power from a prime mover such as a motor. A non-rotating portion on the inner side (rotating shaft side) of the transfer roll 5 is formed with a space E in which the inside can be decompressed. A known exhaust device (not shown) such as an intake fan is connected to the space E, and the interior of the space E can be maintained at a negative pressure by operating the exhaust device.

A plurality of (many) suction holes are formed on the outer peripheral surface of the transfer roll 5 to communicate the inside and outside. While these suction holes pass over the space E maintained at a negative pressure, air is sucked into the interior from the outside, and the piled material in the accumulation recess 22 is caused to rotate by the suction force of the rotary drum 2. Smooth transition from above to the transfer roll 5.

The vacuum conveyor 6 includes an endless breathable belt 63 laid across the drive roll 61 and the driven rolls 62 and 62, and a vacuum for the conveyor 6 disposed at a position facing the transfer roll 5 with the breathable belt 63 interposed therebetween. And a box 64.

The vacuum box 11 on the mesh belt 13 side has a box-like shape having upper and lower surfaces, left and right side surfaces, and a rear surface, and has an opening that opens toward the rotating drum 2. The vacuum box 11 is connected to a known exhaust device (not shown) such as an intake fan through an exhaust pipe (not shown), and the inside of the vacuum box 11 can be maintained at a negative pressure by the operation of the exhaust device. It is.

The mesh belt 13 is a belt-shaped breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls 14 and transfer rolls 5 to move along a predetermined path. The mesh belt 13 is driven by the rotation of the transfer roll 5. As shown in FIG. 1, the mesh belt 13 is introduced onto the outer peripheral surface of the rotating drum 2 in the vicinity of the end of the duct 4 on the side where the scuffing rolls 42 are disposed, and then the vacuum box 11 and the rotating drum 2. And between the transfer roll 5 and the rotary drum 2 are sequentially passed. While the mesh belt 13 passes in front of the opening of the vacuum box 11, the mesh belt 13 is in contact with the outer peripheral surface of the rotating drum 2, and the rotating drum is in the vicinity of the closest portion between the transfer roll 5 and the rotating drum 2. 2 moves away from the outer peripheral surface of 2 and onto the transfer roll 5. The mesh belt 13 has small pores as compared to the suction holes of the transfer roll 5, and suction from the pores of the mesh belt 13 that overlaps with the suction holes with suction from the suction holes of the transfer roll 5. Done.

A pair of windbreak plates 15 are provided on both sides of the area where the suction holes are formed in the width direction of the outer peripheral surface of the transfer roll 5 to prevent or reduce the inflow of wind from the side, This prevents the piled article released from the accumulation recess 22 from being deformed. The material of the windbreak plate 15 is not particularly limited, but is preferably made of metal or synthetic resin and has a thickness of about 0.5 to 10 mm from the viewpoint of providing rigidity that can resist wind.

As the cutting device 7, for example, in the manufacture of absorbent articles such as sanitary napkins and diapers, those conventionally used for cutting absorbent continuous bodies can be used without particular limitation. The cutting device 7 shown in FIG. 1 includes a cutter roll 72 having a cutting blade 71 on the peripheral surface and an anvil roll 73 having a smooth peripheral surface for receiving the cutting blade.

Next, a method for continuously producing an absorbent body using the fiber stacking apparatus 1 described above will be described.
In the manufacturing method of the absorbent body using the fiber stacking apparatus 1, the concave portion 22 for accumulation is provided on the outer peripheral surface 21, and the second region deeper than the concave portion 22 for accumulation which is the first region in the central region of the concave portion 22 for accumulation. The rotary drum 2 having a certain middle-high recess 23 is supplied with a forming material material in a scattered state, and the forming material is stacked in the accumulation recess 22.

Prior to performing the fiber stacking process, first, the exhaust devices connected to the spaces A and B in the rotary drum 2, the space E in the transfer roll 5, and the vacuum box 11 are operated to generate negative pressure. To. By creating a negative pressure in the space A, an air flow (vacuum air) is generated in the duct 4 to convey the absorbent material to the outer peripheral surface 21 of the rotary drum 2. Further, the rotary drum 2 and the transfer roll 5 are rotated, and the vacuum conveyor 6 is operated.

Then, when the molded body material introducing device (not shown) is operated to supply the molded body material as the absorbent material into the duct 4, the molded body material rides on the air flow flowing in the duct 4 and is scattered. In a state, it is supplied toward the outer peripheral surface 21 of the rotary drum 2 and stacked in the accumulation recess 22 (stacking step).

In the stacking process, the pair of

partition plates

41 and 41 are used to excessively stack the molded material in a scattered state so as to overflow into a corresponding region between the pair of

partition plates

41 and 41 in the accumulation recess 22. To do. Specifically, as shown in FIGS. 1, 4, and 6, a pair of

partition plates

41 and 41 are provided inside the duct 4 on both sides along the circumferential direction (2X direction) of the rotary drum 2. Therefore, the molded material in a scattered state is accumulated in a corresponding region between the pair of partition plates 41 in the accumulation recess 22. In the fiber stacking apparatus 1 of the present embodiment, the adjusting body 20 having a large opening area is disposed on the inner surface of the medium / high porous plate 25 disposed in the center region of the accumulation recess 22. And the adjustment body 20 with small opening area is distribute | arranged to the inner surface of the porous plate 27 distribute | arranged to the area | region of the recessed part 22 for accumulation | collection except the porous plate 25 for middle / high. Therefore, the air flow that sucks the molded body material through the medium / high porous plate 25 is not suppressed, and the air flow that sucks the molded body material through the porous plate 27 is suppressed. Therefore, in the manufacturing method of the absorbent body using the fiber stacking apparatus 1, the molded body material in a scattered state is further concentrated on the region where the middle-high recess 23 between the pair of

partition plates

41, 41 is located. be able to.

Furthermore, in the fiber stacking apparatus 1 of the present embodiment, the pair of

partition plates

41, 41 are arranged such that the opposing surfaces of the pair of

partition plates

41, 41 are directed to the rotating drum 2 from the molding material introduction device (not shown) side on the other end side of the duct 4. The interval between the

end portions

41a, 41a on the rotating drum 2 side of the pair of

partition plates

41, 41 is such that the interval between the pair of

partition plates

41, 41 is a middle-high recess in the central region of the accumulation recess 22. This corresponds to the width of 23. Therefore, in the fiber stacking process of the manufacturing method of the absorbent body using the fiber stacking apparatus 1, the forming is performed in a more concentrated state on the region where the middle / high recess 23 between the pair of

partition plates

41, 41 is located. Body material can be accumulated. Here, if the distance between the

end portions

41a, 41a of the pair of

partition plates

41, 41 is set in accordance with the width of the middle / high recess 23 (the width of the middle / high portion of the absorbent body 3 to be formed), the absorption having a high basis weight ratio. The body can be processed. For example, when processing the absorber shown in FIG. 8 to be described later, the width of the thin portion in the width direction of the thick portion (medium / high portion) 33 and the

end portions

41a and 41a of the partition plate are matched to each other. It becomes possible to process the absorber 3 having a high quantitative ratio.

In the region where the middle / high recess 23 is located, the middle / high recess 23 is intermittently arranged in the circumferential direction (2X direction) of the rotary drum 2. It is deeper than the accumulation recess 22 except for the recess 23 for use. Therefore, as shown in FIG. 6, in the region corresponding to the space between the pair of

partition plates

41, 41, in the circumferential direction (2X direction) of the rotary drum 2, the middle / high recess 23 is disposed. The height of the molded body material stacked in the corresponding region is lower than the height of the molded body material stacked in the region corresponding to the portion excluding the middle-high recess 23.

Next, after the fiber stacking step, the excessively stacked molding material is scraped off, and the scraped molding material is restacked on both sides of the excessively stacked portion of the accumulation recess 22 ( Restacking process). More specifically, the inside of the duct 4 provided in the fiber stacking apparatus 1 of the present embodiment includes a fiber stacking region PT that causes the pair of

partition plates

41 and 41 to excessively stack the compacted material in the accumulation recess 22. In addition, the scraped molded body material is divided by a hanging plate 43 into a restacking region RPT for restacking the accumulated compact material into the accumulation recess 22. And in the space 4S which is the restacking fiber region RPT partitioned by the hanging plate 43 inside the duct 4, as shown in FIG. 1 and FIG. A scuffing roll 42 for scraping off an excessive amount of the molding material is provided. Therefore, in the restacking process, as shown in FIG. 7, an excessively stacked forming material is scraped off using a scuffing roll 42. As described above, in the method of manufacturing the absorbent body using the fiber stacking device 1, in the region corresponding to the space between the pair of

partition plates

41, 41, in the circumferential direction (2X direction) of the rotary drum 2, The height of the molding material stacked in the region corresponding to the portion where the recess 23 is disposed is lower than the height of the molding material stacked in the region corresponding to the portion excluding the middle-high recess 23. Therefore, in the region corresponding to the space between the pair of

partition plates

41, 41, the height of the stacked molded material is relatively high, and the region corresponding to the portion excluding the middle-high recess 23 is excessively stacked. The formed molding material is scraped off using the scuffing roll 42. In other words, in the region corresponding to the space between the pair of

partition plates

41, 41, the stacked material material is relatively low in height, and the region corresponding to the portion corresponding to the portion in which the middle-high recess 23 is disposed. The molded body material thus made is difficult to be scraped off by the scuffing roll 42.

In the space 4S of the duct 4, the scraped molded body material is returned in a scattered state to the upstream side in the vicinity of the drooping plate 43 by the drooping plate 43, and restacks in the accumulation concave portion 22. In the fiber stacking apparatus 1 of the present embodiment, a duct opening 44 for taking in outside air is provided inside the duct 4 on the downstream side in the rotational direction 2X of the rotary drum 2 with respect to the scuffing roll 42. Accordingly, when outside air is taken in through the duct opening 44, the molded body material scraped off by the scuffing roll 42 is easily peeled off from the protrusions 422 of the scuffing roll 42, as shown in FIG. 7. In particular, in the fiber stacking apparatus 1 of the present embodiment, the duct opening 44 is provided with a closing plate 441 that is an outside air amount adjusting means, and the opening area of the duct opening 44 is adjusted by the closing plate 441. The outside air flow rate (V1) between the scuffing roll 42 and the top surface of the duct 4 can be adjusted faster than the outside air flow rate (V2) between the scuffing roll 42 and the rotating drum 2. By adjusting in this way, the molded body material scraped off by the scuffing roll 42 can be more easily peeled off from the protrusion 422 of the scuffing roll 42.

In the upstream concave portion 22 in the vicinity of the hanging plate 43 in the space 4S of the duct 4, an excessive amount of the molding material has not yet been scraped off by the scuffing roll. For this reason, the amount of the formed material is less on the both sides along the circumferential direction (2X direction) of the rotating drum 2 of the excessively stacked portion than the excessively stacked portion. The suction force is hardly hindered by the formed molded material. Therefore, the scraped molded material is more likely to be restacked on both sides of the excessively stacked portion in the accumulation recess 22 than in the excessively stacked portion in the accumulation recess 22. Thus, in the fiber stacking apparatus 1 according to the present embodiment, the molded body material scraped off by the scuffing roll 42 can be restacked on the both side portions of the adjacent concave portion 22 for accumulation, so The flow of the wind carrying the molded body material is difficult to change, and it is easy to manufacture an absorbent body having a desired basis weight. Further, in the fiber stacking apparatus 1 of the present embodiment, as shown in FIG. 7, the hanging plate 43 has an arcuate R shape from the top surface of the duct 4 toward the rotation direction (R2 direction) of the rotary drum 2. Since it is formed, the scraped molded body material is guided to the hanging plate 43 to facilitate restacking.

Next, in the manufacturing method of the absorbent body using the fiber stacking apparatus 1, the height of the molded body material stacked in the accumulation recess 22 after the restacking fiber process is again set in the space 4S of the duct 4. The height is adjusted to a certain height by the scuffing roll 42 (height adjustment step). In the fiber stacking apparatus 1 of the present embodiment, the roll body 421 and the numerous protrusions 422 of the scuffing roll 42 are arranged over the entire width of the rotating drum 2, and the height of the protrusions 422 is the maximum of the rotating drum 2. The height is set up to the outer surface 29a of the ring plate 29 forming the outer surface. Therefore, in the manufacturing method of the absorbent body using the fiber stacking apparatus 1, the molded body material stacked in the accumulation recess 22 is adjusted to the height of the outer surface 29 a of the ring plate 29 by the scuffing roll 42.

As described above, as shown in FIG. 1, the formed material 32 is piled in the accumulation recess 22 to obtain the piled product 32, and then the rotating drum 2 is further rotated. When the pile 32 in the accumulation recess 22 comes to a position opposite to the vacuum box 11, it is sucked to the mesh belt 13 by suction from the vacuum box 11, and in this state, the transfer roll 5 And the rotating drum 2 are conveyed to the closest part or the vicinity thereof. Then, the pile 32 in the state of being sucked onto the mesh belt 13 is released from the accumulation recess 22 by suction from the transfer roll 5 side, and transferred onto the transfer roll 5 together with the mesh belt 13.

FIG. 8 shows the fiber pile 32 immediately after being released from the concave portion 22 for accumulation according to the present embodiment. As shown in FIG. 8, in the pile 32, a portion corresponding to the middle / high recess 23 having a deep depth in the central region of the accumulation recess 22 excludes the thick portion 33 and the middle / high recess 23 having a high height. A portion corresponding to the concave portion 22 for accumulation is a thin portion 34 having a low height. Specifically, the thick portion 33 is formed with the height of the space plate 26 disposed on the medium-to-high porous plate 25, the thickness of the concave partition plate 28, and the thickness of the ring plate 29. Yes. Further, the thin portion 34 is formed by the thickness of the concave section plate 28 and the thickness of the ring plate 29 arranged on the porous plate 27.

More specifically, the thick portion 33 includes the MD defining member 262 and the CD image which intersect with each other in a lattice shape in a region surrounded by the annular defining member 261 of the space plate 26 disposed on the medium / high porous plate 25. It is divided by the component member 263 and has a divided thick portion 331. In addition, the thin portion 34 includes an MD defining member 285 and a CD defining member that intersect in a lattice pattern at the opening defining portion 284 excluding the cross-shaped opening 281 of the recessed partition plate 28 disposed on the porous plate 27. It is divided by a member 286 and has a divided thin portion 341.

In the fiber stacking apparatus 1 according to the present embodiment, the adjusting body 20 is not disposed on the inner surface of the medium / high porous plate 25 disposed in the central region of the accumulation recess 22, and The adjusting body 20 is disposed on the inner surface of the porous plate 27 disposed in the region of the accumulation recesses 22 excluding the medium / high porous plate 25. Therefore, the thick portion 33 of the piled product 32 obtained by the absorbent body manufacturing method using the pile device 1 is a high basis weight portion with a relatively large amount of piled absorbent material, The thin portion 34 is a low basis weight portion that has a relatively small amount of absorbent material. Further, the entire bottom surface of the piled article 32 is substantially flat by the scuffing roll 42.

The piled material 32 transferred onto the transfer roll 5 is conveyed while receiving suction from the transfer roll 5 side, and is introduced onto a vacuum conveyor 6 disposed below the transfer roll 5. It is delivered onto a core wrap sheet 37 made of a conductive nonwoven fabric or the like. Thereafter, as shown in FIG. 1, both side portions along the conveying direction of the core wrap sheet 37 are folded back, and the upper and lower surfaces of the piled article 32 are covered with the core wrap sheet 37. And the fiber pile 32 of the state coat | covered with the core wrap sheet | seat 37 is cut | disconnected by the cutter roll 72 of the cutting device 7 in the intermediate position between adjacent

thick parts

33 and 33 with the core wrap sheet | seat 37. FIG. Is done. Thus, the absorbent body 3 covered with the core wrap sheet 37 is obtained.

The absorbent body 3 obtained by the manufacturing method of the absorbent body using the fiber stacking apparatus 1 includes the thick portion 33 and the thin portion 34, and is an absorbent body partially different in height of the molded body material that is the raw material of the absorbent body. . Due to the action of the pair of

partition plates

41 and 41 arranged in the duct 4 and the scuffing roll 42, the absorbent body 3 does not show uneven fiber accumulation, and the absorbent body 3 includes a disposable diaper, a sanitary napkin, It has a high quality suitable as an absorbent for use in absorbent articles such as incontinence pads. Thus, according to the manufacturing method using the fiber stacking apparatus 1 of this embodiment, an absorber provided with the middle-high part of desired height can be manufactured stably. Further, due to the action of the adjusting body 20 described above, the thick portion 33 has a relatively high basis weight, and the thin portion 34 has a relatively low basis weight. Thus, according to the manufacturing method using the fiber stacking apparatus 1 of this embodiment, an absorber provided with the middle-high part of desired basic weight can be manufactured stably.

The present invention (first invention) is not limited to the fiber stacking apparatus 1 of the above embodiment, and can be changed as appropriate.
For example, in the fiber stacking apparatus 1 of the present embodiment described above, the circumferential direction (2X direction) of the rotating drum 2 is inside the duct 4 upstream of the hanging plate 43 in the rotating direction (R2 direction) of the rotating drum 2. Although a pair of

partition plates

41 and 41 are provided on both sides along the line, they may not be provided. Even if the pair of

partition plates

41, 41 are not provided, the height of the molded body material stacked in the region corresponding to the portion where the middle-high recess 23 is arranged in the circumferential direction (2X direction) of the rotary drum 2. However, it is lower than the height of the molding material piled in the area | region corresponding to the part except the recessed part 23 for medium heights. Such an excessively piled molding material in a region corresponding to a portion excluding the middle-high recess 23 is relatively high in the space 4S of the duct 4. Scrape off using a scuffing roll 42. As described above, the molding material scraped off by the scuffing roll 42 is easily peeled off from the protrusion 422 of the scuffing roll 42 by the outside air taken in through the duct opening 44, and is scraped in the partitioned space 4S. The molded body material taken can be easily re-fabricated in the concave portion 22 for accumulation, and an absorbent body having a desired mid-high portion can be stably manufactured.

Moreover, in the fiber stacking apparatus 1 of this embodiment mentioned above, the adjustment body 20 which adjusts a suction force is arrange | positioned in the inner surface side of the rotating drum 2 of the porous plate 27 (porous member) in the accumulation recessed part 22. FIG. However, the adjusting body 20 that adjusts the suction force may not be disposed in any region. The piled product 32 manufactured using such a rotating drum 2 is an unevenly piled product having a thick portion 33 having a high height and a thin portion 34 having a low height. The thick portion in the unevenly distributed fiber is a high basis weight portion having a relatively high basis weight, and the thin portion is a low basis weight portion having a relatively low basis weight.

Further, the shape of the fiber pile 32 to be manufactured is not limited to the above-described shape, and the suction adjustment plate 24, the medium / high porous plate 25, the space plate 26, the porous plate 27, the concave partition plate 28, and a pair of ring plates 29. The arrangement and shape of the accumulation recesses 22 and the arrangement and shape of the middle / high recesses 23 may be flexibly changed by exchanging them. Further, the middle / high recess 23 forming the second region having a depth deeper than the first region in the middle / high recess 23 may be arranged in a region other than the central region of the accumulation recess 22.

Further, as shown in FIG. 3, the rotary drum 2 uses a plate composed of a suction adjustment plate 24, a medium / high porous plate 25, a space plate 26, a porous plate 27, a recessed section plate 28, and a pair of ring plates 29. However, instead of the plate, for example, an integral plate in which a portion where the high basis weight portion is desired is deeply recessed may be used. In addition, by providing a plate composed of the suction adjustment plate 24, the medium / high porous plate 25, the space plate 26, the porous plate 27, the recess partitioning plate 28, and the pair of ring plates 29, an absorber having a high basis weight ratio. Can be manufactured with high accuracy.

The absorbent body produced in the present invention (first invention) is preferably used as an absorbent body for absorbent articles. The absorbent article is mainly used to absorb and retain body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. To do.

Below, this invention (2nd invention) is demonstrated, referring drawings based on the preferable embodiment.
FIG. 9 shows an outline of a fiber stacking apparatus which is a preferred embodiment of the absorbent body manufacturing apparatus according to the present invention (second invention). The fiber stacking apparatus 10 according to the present embodiment includes a rotating drum 2 having a stacking recess 22 on an outer peripheral surface 21 and a duct 4 that supplies a compact material to the outer peripheral surface 21 of the rotating drum 2 in a scattered state. Then, the absorbent body 3 is manufactured by forming the absorbent body 3 by stacking the molded body material into the accumulation recess 22 by the air flow generated by the suction from the inside of the rotary drum 2. The accumulation recess 22 has a first region and a second region deeper than the first region. In the fiber stacking apparatus 10 of the present embodiment, the second region of the stacking recess 22 is a middle-high recess 23 that is deeper than the stacking recess 22 disposed in the central region of the stacking recess 22 as shown in FIG. It is formed with. The first region of the accumulation recess 22 is formed by the accumulation recess 22 excluding the middle-high recess 23 in the central region. That is, the fiber stacking apparatus 10 according to the present embodiment includes the rotating drum 2 having the accumulation recess 22 on the outer peripheral surface 21 and the middle / high recess 23 deeper than the accumulation recess 22 in the central region of the accumulation recess 22. , And a duct 4 that supplies the molded body material in a scattered state toward the outer peripheral surface 21 of the rotary drum 2. More specifically, the fiber stacking device 10 is disposed below the rotary drum 2 that is rotationally driven in the direction of the arrow R 2, the duct 4 that supplies the molding material to the outer peripheral surface 21 of the rotary drum 2, and the diagonally lower side of the rotary drum 2. , A transfer roll 5 that is rotationally driven in the direction of the arrow R5, a vacuum conveyor 6 disposed below the transfer roll 5, and a cutting device 7. In the fiber stacking device 10, a vacuum box 11 is further provided between the duct 4 and the transfer roll 5 in the circumferential direction of the rotary drum 2, and a mesh belt 13 is provided between the vacuum box 11 and the rotary drum 2. The windbreak plate 15 is provided close to the outer peripheral surface of the transfer roll 5 so as to pass between the transfer roll 5 and the rotary drum 2. In addition, from the viewpoint of stably transferring the piled material in the accumulation recess 22 without losing its shape, the pile device 10 of the present embodiment is provided with the vacuum box 11 and the windbreak plate 15. It does not have to be. As shown in FIG. 9, the rotation direction of the rotary drum 2 is a rotation direction in the direction of arrow R 2, which is opposite to the conveyance direction of the core wrap sheet 37 described later, and the rotation direction of the transfer roll 5 is the core direction. The rotation direction is the arrow R5 direction which is the forward direction with respect to the conveyance direction of the wrap sheet 37.

As shown in FIG. 9, the rotating drum 2 has a cylindrical shape and rotates around a horizontal axis in response to power from a motor such as a motor. As shown in FIG. 10, the rotary drum 2 has an accumulation recess 22 in which a molded body material is stacked on the outer peripheral surface 21, and further, the width direction (2Y direction) of the rotation drum 2 in the accumulation recess 22. ), And has a middle-high recess 23 deeper than the stacking recess 22. A plurality of stacking recesses 22 including the middle-high recesses 23 are formed at predetermined intervals in the circumferential direction (2X direction) of the rotary drum 2. 10, 2X direction is the circumferential direction of the

rotating drum

2, and 2Y direction is the width direction of the rotating drum 2 (direction parallel to the rotation axis of the rotating drum 2).

As shown in FIG. 11, the rotary drum 2 includes a cylindrical drum body (not shown) made of a metal rigid body, a suction adjustment plate 24 fixed to the outer periphery of the drum body, and the suction drum. The medium / high porous plate 25 (porous member) fixed to be overlapped on the outer surface 24a side of the adjusting plate 24, the space plate 26 fixed to be overlapped on the outer surface 25a side of the medium / high porous plate 25, and the space A porous plate 27 (porous member) fixed to be overlapped on the outer surface 26 a side of the plate 26, a recess partition plate 28 fixed to be overlapped on the outer surface 27 a side of the porous plate 27, and the recess partition plate 28 And a ring plate 29 fixed on the outer surface 28a side. The rotary drum 2 is formed by fixing the drum body and the plates 24 to 29 to each other by a known fixing means such as a bolt or an adhesive. Here, as shown in FIGS. 10 and 11, the bottom surface 23 a of the middle / high recess 23, which is the fiber surface on which the molded body material is deposited, is composed of a medium / high porous plate 25 (porous member) having a large number of suction holes. Has been. More specifically, the bottom surface 22a of the concave portion 22 for accumulation, which is a fiber surface to be stacked with the molded body material, is composed of a porous plate 27 except for the concave portion 23 for middle and high portions. .

In the present specification, the outer surface of each component of the rotary drum 2 (the suction adjustment plate 24, the medium / high porous plate 25, the space plate 26, the porous plate 27, the recessed section plate 28, the ring plate 29, etc.) The surface of the component member is directed to the supply side of the molded body material when the molded body material is stacked. In addition, the inner surface of each constituent member is a surface directed to the side opposite to the supply side of the molding material (the inner side of the rotating drum) when the molding material is stacked in the constituent member. . When the molded body manufactured by the fiber stacking apparatus 10 is an absorbent body used for absorbent articles such as disposable diapers and sanitary napkins, the molded body material is an absorbent material.

The molded body material includes a fiber material. As the molded body material as the absorbent material, various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers such as defibrated pulp, short fibers of cellulosic fibers such as rayon fibers and cotton fibers, and short fibers of synthetic fibers such as polyethylene are used. These fiber materials can be used alone or in combination of two or more. Moreover, you may use a water absorbing polymer with a fiber material as an absorber raw material. Further, as the fibrous raw material, a fibrous water-absorbing polymer can be used alone or together with the fibrous material. Furthermore, a deodorant, an antibacterial agent, etc. can also be used with a fiber material etc. as needed.

The ring plate 29 is a member whose outer surface 29 a is located on the outermost side of the rotary drum 2 and forms a part of the outer peripheral surface 21, and is also a member that forms the outer peripheral surface of the accumulation recess 22. Here, the “outer peripheral surface of the accumulation concave portion 22” means that the accumulation concave portion 22 is viewed from the outside in the normal direction of the outer peripheral surface of the rotary drum 2 (direction perpendicular to the rotation axis direction of the rotary drum 2). It means the outer surface along the outline of the concave portion 22 for accumulation. Hereinafter, in the present specification, viewing the object such as the accumulation recess 22 from the outside in the normal direction of the outer peripheral surface of the rotary drum 2 is referred to as a plan view of the object such as the accumulation recess 22. In the fiber stacking apparatus 10 of the present embodiment, the stacking recess 22 has a rectangular outline that is long in the transport direction when the stacking recess 22 is viewed in plan, and therefore, the pair of

ring plates

29 and 29 are The ring plates 29 are arranged on both sides of the rotating drum 2 and are formed to extend with the same width over the entire circumference of the rotating drum 2. Each ring plate 29 is formed to have a constant thickness.

In the ring plate 29 formed as described above, the width between the pair of

ring plates

opening defining members

ring plates

The porous plate 27 has a plurality of cross-shaped openings 271 in plan view. The cross-shaped opening 271 of the porous plate 27 is disposed at the same position as each cross-shaped opening 281 of the recessed section partition plate 28 fixed to be overlapped with the outer surface 27 a of the porous plate 27. The plurality of cross-shaped openings 271 of the porous plate 27 and the plurality of cross-shaped openings 281 of the recessed partition plate 28 correspond one-to-one, and the shapes in plan view are similar to each other. . In the fiber stacking apparatus 10 of the present embodiment, the cross-shaped opening 271 of the porous plate 27 has a similarity ratio of 1 to the cross-shaped opening 281 of the corresponding recessed partition plate 28, and the opening 271 and the opening 271 are open. The portion 281 has a congruent relationship in shape in plan view.

The porous plate 27 is a member that forms the bottom surface 22a of the accumulation recess 22 excluding the middle / high recess 23. The porous plate 27 transmits an air flow (vacuum air) generated by suction from the inner side of the fiber stacking apparatus 10 (inward of the rotating drum 2) to the duct 4 covering the rotating drum 2, and the air flow is transmitted to the air flow. It is a breathable plate that holds the molded body material carried on board without allowing it to permeate and allows only air to permeate. In the porous plate 27, a plurality of (multiple) suction holes (pores) penetrating the plate 27 in the thickness direction are formed in a region excluding the plurality of cross-shaped openings 271; While the accumulation recess 22 passes through the space maintained at a negative pressure in the rotary drum 2, the suction hole functions as an air flow permeation hole. As the porous plate 27, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

As described above, the annular defining member 261 of the space plate 26 is formed along the outline of each cross-shaped opening 271 of the porous plate 27 fixed to be overlapped with the outer surface 26a of the space plate 26. The plurality of annular defining members 261 of the space plate 26 and the outlines of the plurality of cross-shaped openings 271 of the porous plate 27 have a one-to-one correspondence, and the shapes in plan view are similar to each other. In the fiber stacking device 10 of the present embodiment, the plurality of annular defining members 261 of the space plate 26 have a similarity ratio of 1 to the contour of the cross-shaped opening 271 of the corresponding porous plate 27. Therefore, the annular defining member 261 includes not only the outline of the opening 271 of the porous plate 27 but also the cross-shaped opening 281 of the recessed partition plate 28 that has a congruent relationship with the opening 271 of the porous plate 27. The shape of the opening defining member 282 to be defined also has a congruent relationship in shape in plan view.

The plurality of openings 265 of the space plate 26 correspond one-to-one with the plurality of openings 283 of the concave partition plate 28 fixed on the outer surface 2a of the space plate 26 via the porous plate 27. The planar view shapes are similar to each other. In the fiber stacking apparatus 10 of the present embodiment, the opening portion 265 of the space plate 26 has a similarity ratio of 1 to the opening portion 283 of the corresponding recessed section partition plate 28, and the opening portion 265 and the opening portion 283 are viewed in plan view. The shapes are congruent with each other. The annular defining member 261, the MD defining member 262, and the CD defining member 263 constituting the space plate 26 are formed with a constant thickness. The thickness of the space plate 26 is one of the factors that determine the depth of the middle-high recess 23 in the central region of the accumulation recess 22.

A plurality of the medium-high porous plates 25 are arranged in a plan view and are formed in a cross shape. Each cross-shaped medium / high porous plate 25 is disposed at the same position as each annular defining member 261 of the space plate 26 fixed to be overlapped on the outer surface 25 a of the medium / high porous plate 25. The outlines of the plurality of cross-shaped medium-high porous plates 25 and the plurality of annular defining members 261 of the space plate 26 have a one-to-one correspondence, and the shapes in plan view are similar to each other. In the fiber stacking apparatus 10 of the present embodiment, the cross-shaped medium / high porous plate 25 has a similarity ratio of 1 to the annular defining member 261 of the corresponding space plate 26. Therefore, the cross-shaped porous plate 25 for medium and high is not only congruent in its outline with the annular defining member 261, but also its entire shape is the opening 271 of the porous plate 27 and the concave partition plate 28. These cross-shaped openings 281 also have a congruent relationship in plan view.

The medium / high porous plate 25 is a member that forms the bottom surface 23 a of the medium / high recess 23. As with the porous plate 27, the medium / high porous plate 25 covers the rotary drum 2 with an air flow (vacuum air) generated by suction from the inside of the fiber stacking device 10 (inward of the rotary drum 2). It is a breathable plate that transmits the air inside the duct 4 and carries the molded body material carried on the air flow without transmitting it, and allows only air to pass through. A plurality of (multiple) suction holes (pores) that penetrate through the plate 25 in the thickness direction are formed in the middle / high porous plate 25 in a uniform distribution. While passing through the space maintained at a negative pressure in the rotary drum 2, the suction hole functions as an air flow permeation hole. As the medium / high porous plate 25, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

The suction adjustment plate 24 includes, in plan view, an annular defining member 241 formed along the contour of the cross-shaped medium-to-high porous plate 25 that is overlapped and fixed to the outer surface 24a of the suction adjustment plate 24, and the conveyance direction. And a plurality of CD defining members 243 extending in parallel to the width direction (2Y direction) (extending in a direction perpendicular to the conveying direction). The MD defining member 242 and the CD defining member 243 not only intersect with each other but also intersect with the annular defining member 241 to form a lattice shape. In the region surrounded by the annular defining member 241, the suction adjusting plate 24 is positioned at the grid portion where the MD defining member 242 and the CD defining member 243 intersect, and a plurality of suction adjusting plates 24 penetrates in the thickness direction. An annular inner opening 244 is provided. The plurality of annular inner openings 244 of the suction adjustment plate 24 is different from the plurality of annular inner openings 264 of the space plate 26 fixed on the outer surface 24a of the suction adjustment plate 24 via the medium / high porous plate 25. They correspond to each other, and the shapes in plan view are similar to each other. In the fiber stacking apparatus 10 of the present embodiment, the annular inner opening 244 of the suction adjustment plate 24 has a similarity ratio of 1 to the annular inner opening 264 of the corresponding space plate 26, and the annular inner opening 244 and the inner ring The opening 264 has a congruent relationship in shape in plan view.

In the region excluding the annular defining member 241, the suction adjusting plate 24 is located at the grid portion where the MD defining member 242 and the CD defining member 243 intersect and has a plurality of openings that penetrate in the thickness direction. H.245. The plurality of openings 245 of the suction adjustment plate 24 have a one-to-one correspondence with the plurality of openings 265 of the space plate 26 fixed on the outer surface 24a of the suction adjustment plate 24 via the medium / high porous plate 25. The planar view shapes are similar to each other. In the fiber stacking apparatus 10 of the present embodiment, the opening portion 245 of the suction adjustment plate 24 has a similarity ratio with respect to the opening portion 265 of the corresponding space plate 26 smaller than 1, and the relative ratio is 0.5 or more and 0.05 or less. It is preferable that That is, the opening area of the opening 245 of the suction adjustment plate 24 is narrower than the opening area of the opening 265 of the space plate 26. The ratio (S2 / S1) of the opening area (S2) to the opening area (S1) of the opening 265 of the space plate 26 in the opening 245 of the suction adjustment plate 24 is preferably 50% or more and 5% or less, more preferably It is 15% or more and 7% or less.

The rotary drum 2 includes a suction adjusting plate 24 configured as described above, a plurality of medium / high porous plates 25, a space plate 26, a porous plate 27, a recessed section plate 28, and a pair of ring plates 29. Are fixed to each other. As shown in FIG. 10, the rotary drum 2 provided in the fiber stacking device 10 of the present embodiment configured as described above has an adjustment body 20 that adjusts the suction force on the inner surface side of the porous member of the accumulation recess 22. Is disposed on the inner surface of the porous member. The adjusting body 20 has a plurality of openings penetrating the adjusting body 20 in the thickness direction, and a part of the opening is relatively relative to the opening portion relatively far from the porous member of the accumulation recess 22. The opening area is smaller than the closest opening. The adjusting member 20 for adjusting the suction force is not disposed on the inner surface side of the porous member of the middle-high recess 23, and the suction holes (pores) of the porous member have an opening area on the outer surface side and an inner surface side. The opening area is the same. Specifically, the opening area of the opening disposed on the outer surface side of the porous member of the middle-high recess 23 and the opening area of the opening disposed on the inner surface side of the porous member are the same. This will be specifically described below.

As shown in FIG. 10, the middle and high concave portions 23 formed on the outer surface 21 of the rotary drum 2 are viewed in plan, and the outline thereof is an annular defining member 241 of the suction adjustment plate 24. The contour of the porous plate 25, the annular defining member 261 of the space plate 26, the contour of the opening 271 of the porous plate 27, and the position of the opening defining member 282 of the recessed partition plate 28 coincide to form a cross shape. Is formed. Further, the middle / high concave portion 23 of the accumulation concave portion 22 has a bottom surface 23a formed of a medium / high porous plate 25 (porous member), and a region in the middle / high concave portion 23 is seen in a plan view as shown in FIG. Thus, the positions and shapes of the plurality of annular inner openings 244 of the suction adjustment plate 24 sandwiching the medium-to-high porous plate 25 and the plurality of annular inner openings 264 of the space plate 26 are the same. As described above, only the suction adjusting plate 24 is disposed on the inner side of the rotary drum 2 than the medium-high porous plate 25 (porous member) constituting the bottom surface 23a of the medium-high recess 23, and the medium-high porous The opening area of the annular inner opening 264 of the space plate 26 disposed on the outer surface side of the porous plate 25 and the opening area of the annular inner opening 244 of the suction adjustment plate 24 disposed on the inner surface side of the medium / high porosity plate 25 Are the same. Therefore, the adjusting body 20 for adjusting the suction force is not disposed on the inner surface side of the middle / high porous plate 25 in the middle / high recess 23 in the accumulation recess 22. Further, as shown in FIG. 12, the depth of the middle / high recess 23 for the stacking recess 22 is such that the thickness of the space plate 26 disposed on the medium / high porous plate 25, the thickness of the recess partition plate 28, and The ring plate 29 is formed with a thickness.

The concavity 22 for accumulation formed on the outer surface 21 of the rotating drum 2 is formed in a band shape with its outline sandwiched between a pair of

rectangular ring plates

29 and 29 as seen in plan view as shown in FIG. ing. In addition, the accumulation recess 22 has a bottom surface 22a in a region excluding the middle / high recess 23 formed of a porous plate 27 (porous member). In the region excluding the middle / high recess 23, as shown in FIG. Thus, the positions and shapes of the plurality of openings 283 of the concave section partition plate 28 and the plurality of openings 265 of the space plate 26 match, and the positions of the

openings

283 and 265 are closer to the center than their opening areas. An opening 245 of the narrow suction adjustment plate 24 is also arranged. That is, the opening area of the opening 245 of the suction adjustment plate 24 is narrower than the opening area of each of the opening 283 of the recessed partition plate 28 and the opening 265 of the space plate 26. Thus, the space plate 26 and the suction adjustment plate 24 are located inward of the rotary drum 2 rather than the porous plate 27 (porous member) that constitutes the bottom surface 22a of the region excluding the middle-high concave portion 23. The opening area 245 of the suction adjustment plate 24 that is relatively far from the porous plate 27 (porous member) is compared with the opening 265 of the space plate 26 that is relatively close to the opening area 265. Therefore, the adjusting body 20 for adjusting the suction force is disposed on the inner surface side of the porous plate 27 (porous member) in the region excluding the middle-high recess 23 for the accumulation recess 22. Further, as shown in FIG. 12, the depth of the recesses 22 for accumulation (excluding the recesses 23 for middle and high) is equal to the thickness of the recess partition plate 28 disposed on the porous plate 27 and the thickness of the ring plate 29. Will be formed.

When the adjusting body 20 described above is disposed on the inner surface side of the porous plate 27 (porous member) in the region excluding the middle / high recess 23 for the accumulation recess 22, the middle / high recess 23 for middle / high Compared to the case where the adjusting body 20 is not disposed as on the inner surface side of the porous plate 25 (porous member), the air flow for sucking the molded body material through the porous member by suction from the inside of the apparatus (Vacuum air) is suppressed. That is, as shown in FIG. 13, the air flow (indicated by an arrow in FIG. 13) that flows inward from the outside of the rotary drum 2 through the porous plate 27 is caused by the adjusting body 20 at the bottom of the recess 22. In the disposed region, the components pass through the rotary drum 2 in the order of the porous plate 27, the opening 265 of the space plate 26, and the opening 245 of the suction adjustment plate 24. At that time, the air flow is located leeward of the air flow, and the opening 245 of the suction adjusting plate 24 that substantially functions as a suction portion for the molded body material is more upwind of the air flow than the opening 245. Since the opening area is made smaller than the opening 265 of the space plate 26 positioned, the air permeability through the porous plate 27 is hindered, and the air volume of the air flow is suppressed.

Further explaining the fiber stacking apparatus 10 of the present embodiment, as shown in FIG. 9, the inner side (rotary shaft side) of the rotary drum 2 is partitioned from each other in the circumferential direction (2X direction) of the rotary drum 2. Spaces B, C, and D are formed. A known exhaust device (not shown) such as an intake fan is connected to the space B, and the space B can be maintained at a negative pressure by operating the exhaust device. External air flows into the space C by suction from the vacuum box 11 side, which will be described later, and external air flows into the space D by suction from the transfer roll 5 side. The space C is separated from the space D, which is a region after the transfer, in order to satisfactorily perform transfer on the space C (transfer of the piled material in the accumulation recess 22 to the transfer roll 5 and the like). The rotary drum 2 is blown (air flow) from the inside of the rotary drum 2 toward the porous plate 27 in a space (space C) corresponding to the transfer position of the piled material in the accumulation recess 22 to the transfer roll 5. ) Generating means may be included. In that case, by actively blowing from the space C toward the vacuum box 11 using the generating means, it is possible to promote the release of the piled articles from the accumulation concave portion 22. The rotating drum 2 has one end in the axial direction of the rotating shaft sealed with a plate that rotates integrally with the rotating drum 2, and the other end sealed airtight with a plate that does not rotate. The spaces B to D are partitioned by a plate provided from the rotating shaft side of the rotating drum 2 toward the inner surface of the rotating drum 2.

As shown in FIG. 9, one end side of the duct 4 is located on the space B of the rotating drum 2 and covers the outer peripheral surface of the rotating drum 2 over the entire region of the space B, and the other end side (not shown). Has a molded body material introducing device (not shown). The molded body material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into the duct 4. A water-absorbing polymer introduction part for introducing water-absorbing polymer particles in the middle of the duct 4 can also be provided.
The individual recesses 22 for accumulation of the rotary drum 2 pass through the porous plate 27 and the medium / high porous plate 25 constituting the bottom surfaces 22a and 23a described above while passing over the space B maintained at a negative pressure. Then suction from the suction part is performed. By suction from the pores of the porous material in each accumulation recess 22, an air flow is generated in the duct 4 to convey the raw material of the absorber to the outer peripheral surface of the rotary drum 2, and the air is carried on the air flow. The raw material is deposited in each accumulation recess 22.

In the inside of the duct 4, as shown in FIG. 9,

partition plates

41, 41 disposed along both sides along the circumferential direction (2X direction) of the rotary drum 2, and the partition plate 41 to the rotary drum 2. There is provided a scuffing roll 42 which is spaced downstream in the rotational direction (R2 direction) and whose surface is in contact with the molded body material, and scrapes off an excessive amount of the molded body material stacked. This will be specifically described below.

The pair of

partition plates

41 and 41 extend along both side portions along the circumferential direction (2X direction) of the rotary drum 2. Further, the pair of

partition plates

41 and 41 excessively load the molded material in a scattered state so as to overflow from the accumulation recess 22 into a region corresponding to the space between the pair of

partition plates

41 and 41 in the accumulation recess 22. They are spaced apart from each other so that they are fine. More specifically, the pair of

partition plates

ring plates

29, 29 that form the outer peripheral surface 21, and extends in the circumferential direction (2X direction) along the ring plate 29. Further, in the drum width direction (2Y direction), each partition plate 41 is arranged on the rotary drum 2 across the ring plate 29 from each side wall 40 constituting the duct 4 in a sectional view as shown in FIG. The stacking concave portion 22 extends to a position covering the side portion along the circumferential direction (2X direction). More specifically, each partition plate 41 extends from each side wall 40 constituting the duct 4 over the ring plate 29 to the circumferential direction (2X in the middle-high recess 23 in the central region of the stacking recess 22 disposed in the rotary drum 2. Extending to the vicinity of the side edge along the direction). The pair of

partition plates

As shown in FIG. 9 and FIG. 12, in the fiber stacking device 10 of the present embodiment, the partition plates 41 have a substantially right-angled triangular cross section or an upper base on the lower base as having the inclined surface described above. Compared to the trapezoidal trapezoidal shape, the trapezoidal cross section is extremely narrow. The pair of

partition plates

41 and 41 having such a quadrangular pyramid shape are spaced apart from each other in the drum width direction (2Y direction), and the opposing surfaces of the molded body material introducing device (the other end side of the duct 4) ( (Not shown) inclined from the side toward the rotary drum 2 so that the interval between the pair of

partition plates

41, 41 gradually decreases, and the interval between the

end portions

41a, 41a on the rotary drum 2 side of the pair of

partition plates

41, 41 is accumulated. This corresponds to the width of the middle-high recess 23 in the central region of the recess 22 for use. Further, the lower ends 41d and 41d of the pair of

partition plates

41 and 41 closest to the rotating drum 2 are accumulated from the side walls constituting the duct 4 as viewed in the direction of the rotation axis of the rotating drum 2 as shown in FIG. It extends to a position covering the side portion along the circumferential direction (2X direction) in the concave portion 22 for use. That is, each partition plate 41 is formed in contact with the side wall constituting the duct 4. As a forming material of such a partition plate 41, a metal, a synthetic resin, or a material combining them can be used.

The scuffing roll 42 is disposed inside the duct 4 on the outer peripheral surface 21 of the rotary drum 2 so as to contact the molded body material, as shown in FIGS. 9 and 14. Then, the scuffing roll 42 scrapes off an excessive amount of the molded body material piled up in a corresponding region between the pair of

partition plates

41 and 41 inside the duct 4, and removes the scraped molded body material. It arrange | positions in the position spaced apart from the pair of

partition plates

41 and 41 to the downstream of the rotation direction (R2 direction) of the rotating drum 2 so as to restack on both sides of the excessively stacked portion in the accumulation recess 22. ing. Specifically, the scuffing roll 42 has a cylindrical roll main body 421 and a large number of scraping protrusions 422 erected on the outer peripheral surface of the roll main body 421. In the drum width direction (2Y direction) of the scuffing roll 42, the roll body 421 is arranged over the entire width of the rotary drum 2 on the pair of

ring plates

29, 29, and a large number of protrusions 422 are accumulated at least. Preferably, the concave portion 22 is disposed in a central region on the middle-high concave portion 23, more preferably in a region between the pair of

ring plates

29, 29, and the entire width of the rotary drum 2 is increased. It is particularly preferable that they are arranged over the entire area. In the fiber stacking apparatus 10 of the present embodiment, the roll main body 421 and a large number of protrusions 422 are arranged over the entire width of the rotary drum 2. The scuffing roll 42 scrapes off an excessive amount of the molded body material that is piled up so as to overflow in the accumulation recess 22 by the protrusions 422. As a material for forming the protrusion 422, a metal such as stainless steel, aluminum, or iron, or a synthetic resin is used. In the fiber stacking apparatus 10 of this embodiment, a stainless steel brush is used. The height of the protrusion 422 can be set as appropriate according to the amount of the molded body material to be scraped. However, in the fiber stacking apparatus 10 of this embodiment, the outer surface of the ring plate 29 that forms the outermost surface of the rotary drum 2. The height is set up to 29a. Specifically, the height of the protrusion 422 is preferably about 1 mm to 10 mm from the peripheral surface of the roll body 421 of the scuffing roll 42, and particularly preferably about 4 mm to 6 mm.

The scuffing roll 42 receives power from a motor such as a motor and rotates around the horizontal axis. In the fiber stacking device 10 of the present embodiment, the scuffing roll 42 is rotationally driven in the direction of arrow R3, and rotates so that the surface facing the rotating drum 2 moves in the direction opposite to the rotating direction of the rotating drum 2. is doing. That is, in the fiber stacking apparatus 10 of this embodiment, the rotation directions of the scuffing roll 42 and the rotary drum 2 are the same. The peripheral speed of the scuffing roll 42 is 2 in comparison with the peripheral speed of the rotary drum 2 from the viewpoint of the balance between the amount of scraping of the molded body material and restacking of the scraped molded body material in the near field. It is preferably from 10 times to 10 times, more preferably from 3 times to 5 times. That is, when the peripheral speed of the scuffing roll 42 is higher than the peripheral speed of the rotary drum 2 as described above, an excessive amount of the molded material is stacked so that the protrusions 422 of the scuffing roll 42 overflow in the accumulation recess 22. The excessive number of molding materials in the accumulation recesses 22 excluding the middle and high recesses 23 can be scraped evenly. The peripheral speed of the scuffing roll 42 means the peripheral speed on the surface of the roll body 421, and the peripheral speed of the rotating drum 2 means the peripheral speed on the surface of the ring plate 29 that forms the outer peripheral surface 21 of the rotating drum 2. To do.

Moreover, in the inside of the duct 4 of the fiber stacking apparatus 10 of this embodiment, as shown in FIG.9, FIG.14, between the pair of

partition plates

41 and 41 and the scuffing roll 42, the top | upper surface of this duct 4 is provided. It has a hanging plate 43 that hangs down. The interior of the duct 4 is divided by the hanging plate 43 into a fiber stacking region PT on the upstream side in the rotation direction (R2 direction) and a restacking fiber region RPT on the downstream side in the rotation direction (R2 direction). Here, the fiber accumulation region PT inside the duct 4 is a region where the scattered compact material is excessively accumulated so as to overflow the accumulation recess 22. Also, the restacking region RPT inside the duct 4 is an excess amount of the formed body material scraped off by the scuffing roll 42 and the scraped forming body material is excessively stacked in the accumulation recess 22. This is a region where the fibers are restacked on both sides of the portion that has been allowed to fall. Specifically, the drooping plate 43 is formed in a convex arc shape from the top surface of the duct 4 toward the upstream side in the circumferential direction (2X direction) of the rotating drum 2 over the entire width of the duct 4. The tip of the hanging plate 43 hangs down to a position where it does not touch the top of an excessive amount of molded material that has been piled up so as to overflow. By arranging such a hanging plate 43, the scuffing roll 42 is partitioned inside the duct 4. When such a hanging plate 43 is arranged, the piled area (the area where the defibrated molded material is piled on the surface of the rotating drum 2) and the restacked area (the scuffing 42 are scraped off). The area where the molded body material is re-stacked) is divided, and the stacking of the molded body material in the area corresponding to the space between the pair of

partition plates

41 and 41 in the accumulation recess 22 in the stacking area is inhibited. It is hard to do.

In the fiber stacking device 10 of the present embodiment having the rotating drum 2 and the duct 4 configured as described above, a pair of partitions in the stacking recess 22 is formed by a pair of

partition plates

41 and 41 with the molded material in a scattered state. The

sheets

41 and 41 are excessively stacked so as to overflow the corresponding region, and the excess amount of the formed body material is scraped off by the scuffing roll 42, and the scraped-off molded body material is accumulated. It is an apparatus which re-fibers on the both sides of the part in which the fiber 22 was excessively piled up. The transfer roll 5, the vacuum conveyor 6, the cutting device 7 and the like that the fiber stacking device 10 has in addition to the rotating drum 2 and the duct 4 will be described below.

The mesh belt 13 is a belt-shaped breathable belt having a mesh connected endlessly, and is continuously guided along a plurality of free rolls 14 and transfer rolls 5 to move along a predetermined path. The mesh belt 13 is driven by the rotation of the transfer roll 5. As shown in FIG. 9, the mesh belt 13 is introduced onto the outer peripheral surface of the rotating drum 2 in the vicinity of the end portion of the duct 4 on the side where the scuffing roll 42 is disposed, and then the vacuum box 11 and the rotating drum 2. And between the transfer roll 5 and the rotary drum 2 are sequentially passed. While the mesh belt 13 passes in front of the opening of the vacuum box 11, the mesh belt 13 is in contact with the outer peripheral surface of the rotating drum 2, and the rotating drum is in the vicinity of the closest portion between the transfer roll 5 and the rotating drum 2. 2 moves away from the outer peripheral surface of 2 and onto the transfer roll 5. The mesh belt 13 has small pores as compared to the suction holes of the transfer roll 5, and suction from the pores of the mesh belt 13 that overlaps with the suction holes with suction from the suction holes of the transfer roll 5. Done.

As the cutting device 7, for example, in the manufacture of absorbent articles such as sanitary napkins and diapers, those conventionally used for cutting absorbent continuous bodies can be used without particular limitation. The cutting device 7 shown in FIG. 9 includes a cutter roll 72 having a cutting blade 71 on the peripheral surface and an anvil roll 73 having a smooth peripheral surface for receiving the cutting blade.

Next, an embodiment of a method for continuously producing an absorbent body using the fiber stacking apparatus 10 described above, that is, an embodiment of a method for producing an absorbent body of the present invention (second invention) will be described.
In the manufacturing method of this embodiment, the concave portion for accumulation 22 is provided on the outer peripheral surface 21, and the concave portion for medium and high is a second region deeper than the concave portion for accumulation 22 as the first region in the central region of the concave portion for accumulation 22. The rotary drum 2 having the above is provided with a fiber stacking process in which the green body material is supplied in a scattered state, and the green body material is stacked in the accumulation recess 22.

Prior to performing the fiber stacking step, first, the exhaust device connected to each of the space B in the rotary drum 2, the space E in the transfer roll 5, and the vacuum box 11 is operated to make negative pressure. By making negative pressure in the space B, an air flow (vacuum air) is generated in the duct 4 to convey the absorbent material to the outer peripheral surface 21 of the rotary drum 2. Further, the rotary drum 2 and the transfer roll 5 are rotated, and the vacuum conveyor 6 is operated.

In the fiber stacking process, in the fiber stacking region PT, the molded material in the scattered state using the pair of

partition plates

41 and 41 is placed in a region corresponding to the space between the pair of

partition plates

41 and 41 in the accumulation recess 22. It piles up excessively so as to overflow. Specifically, as shown in FIGS. 9, 12, and 14, a pair of

partition plates

41 and 41 are provided inside the duct 4 on both sides along the circumferential direction (2X direction) of the rotary drum 2. Therefore, the molded material in a scattered state is accumulated in a corresponding region between the pair of partition plates 41 in the accumulation recess 22. In the fiber stacking device 10 of the present embodiment, the adjusting body 20 is not disposed on the inner surface of the medium-high porous plate 25 disposed in the center region of the accumulation recess 22. And the adjustment body 20 is distribute | arranged to the inner surface of the porous plate 27 distribute | arranged to the area | region of the recessed part 22 for accumulation except the porous plate 25 for middle / high. Therefore, the air flow that sucks the molded body material through the medium / high porous plate 25 is not suppressed, and the air flow that sucks the molded body material through the porous plate 27 is suppressed. Therefore, in the present embodiment, it is possible to concentrate the scattered molded body material on the region where the middle-high recess 23 between the pair of

partition plates

41 and 41 is located.

Furthermore, in the fiber stacking apparatus 10 of the present embodiment, the pair of

partition plates

41, 41 are arranged such that the opposing surfaces of the pair of

partition plates

end portions

41a, 41a on the rotating drum 2 side of the pair of

partition plates

41, 41 is such that the interval between the pair of

partition plates

41, 41 is a middle-high recess in the central region of the accumulation recess 22. This corresponds to the width of 23. Therefore, in the fiber stacking process of the present embodiment, it is possible to accumulate the compacted material in a concentrated state on the region where the middle / high recess 23 between the pair of

partition plates

41 and 41 is located. . Here, if the distance between the

end portions

41a, 41a of the pair of

partition plates

41, 41 is set in accordance with the width of the middle / high recess 23 (the width of the middle / high portion of the absorbent body 3 to be formed), the absorption having a high basis weight ratio. The body can be processed. For example, when processing the absorber shown in FIG. 16, which will be described later, by combining the width of the thin portion in the width direction of the thick portion (medium / high portion) 33 and the

end portions

41a and 41a of the partition plate, It becomes possible to process the absorber 3 having a high quantitative ratio.

In the region where the middle / high recess 23 is located, the middle / high recess 23 is intermittently arranged in the circumferential direction (2X direction) of the rotary drum 2. It is deeper than the accumulation recess 22 except for the recess 23 for use. Therefore, as shown in FIG. 14, in the region corresponding to the space between the pair of

partition plates

41, 41, in the circumferential direction (2X direction) of the rotary drum 2, the portion where the middle-high recess 23 is arranged. The height of the molded body material stacked in the corresponding region is lower than the height of the molded body material stacked in the region corresponding to the portion excluding the middle-high recess 23.

Next, after the fiber stacking step, the excessively stacked molding material is scraped off, and the scraped molding material is restacked on both sides of the excessively stacked portion of the accumulation recess 22 ( Restacking process). Specifically, as shown in FIGS. 9 and 14, a scuffing roll 42 is provided inside the duct 4 so as to be separated from the partition plate 41 on the downstream side and scrape off an excessive amount of formed material. It has been. Therefore, in the restacking fiber process, as shown in FIG. 15, an excessively stacked forming body material is scraped off using a scuffing roll 42. As described above, in the present embodiment, in a region corresponding to the space between the pair of

partition plates

41, 41, the middle-high recess 23 is arranged in the circumferential direction (2X direction) of the rotary drum 2. Since the height of the molded body material stacked in the corresponding region is lower than the height of the molded body material stacked in the region corresponding to the portion excluding the middle-high recess 23, the pair of

partition plates

41 , 41 in the region corresponding to between the two, the height of the stacked molded material is relatively high, the excessively stacked molded material in the region corresponding to the portion excluding the middle-high recess 23, The scuffing roll 42 is used for scraping. In other words, in the region corresponding to the space between the pair of

partition plates

The molded body material scraped off is returned in a scattered state to the upstream side in the vicinity in the restacking fiber region RPT in the duct 4 and restacked in the accumulation recess 22. In the collecting recess 22 on the upstream side in the near field, an excessive amount of the molding material has not yet been scraped off by the scuffing roll 42. For this reason, the amount of the formed material is less on the both sides along the circumferential direction (2X direction) of the rotating drum 2 of the excessively stacked portion than the excessively stacked portion. The suction force is hardly hindered by the formed molded material. Therefore, the scraped molded material is more likely to be restacked on both sides of the excessively stacked portion in the accumulation recess 22 than in the excessively stacked portion in the accumulation recess 22. Thus, in the fiber stacking apparatus 10 according to the present embodiment, the molded body material scraped by the scuffing roll 42 can be restacked on the both side portions in the adjacent concave portion 22 for accumulation. The flow of the wind carrying the molded body material is difficult to change, and it is easy to manufacture an absorbent body having a desired basis weight.

In the fiber stacking apparatus 10 of the present embodiment, a hanging plate 43 is provided between the pair of

partition plates

41 and 41 and the scuffing roll 42, and the scuffing roll 42 is formed inside the duct 4 by the hanging plate 43. It is partitioned. Therefore, in this embodiment, the molded body material scraped off and returned to the upstream side in the scattered state is returned to the adjacent field on the upstream side by the drooping plate 43, and excessively in the accumulation recess 22 The molded material scraped off is more easily restacked on both sides of the excessively stacked portion of the accumulation recess 22 than on the stacked portion. In particular, in the present embodiment, as shown in FIG. 15, the hanging plate 43 is formed in an arcuate R shape from the top surface of the duct 4 toward the rotation direction (R2 direction) of the rotary drum 2. The molded body material thus scraped off is guided to the drooping plate 43 and is easy to restack.

Next, after the re-stacking step, the height of the molded body material stacked in the accumulation recess 22 is adjusted again to a certain height by the scuffing roll 42 (height adjustment step). In the fiber stacking apparatus 10 of the present embodiment, the roll body 421 and the numerous protrusions 422 of the scuffing roll 42 are arranged over the entire width of the rotating drum 2, and the height of the protrusions 422 is in contact with the molded body material. Thus, the height is set to reach the outer surface 29a of the ring plate 29 that forms the outermost surface of the rotary drum 2. For this reason, in the present embodiment, the molding material stacked in the accumulation recess 22 is scraped off by the scuffing roll 42, and the scraped molding material has a height up to the protrusion 422 of the scuffing roll 42. That is, in the present embodiment, the height of the outer surface 29a of the ring plate 29 is adjusted.

As described above, as shown in FIG. 9, the shaped material is stacked in the accumulation recess 22 to obtain the stacked product 32, and then the rotating drum 2 is further rotated. When the pile 32 in the accumulation recess 22 comes to a position opposite to the vacuum box 11, it is sucked to the mesh belt 13 by suction from the vacuum box 11, and in this state, the transfer roll 5 And the rotating drum 2 are conveyed to the closest part or the vicinity thereof. Then, the pile 32 in the state of being sucked onto the mesh belt 13 is released from the accumulation recess 22 by suction from the transfer roll 5 side, and transferred onto the transfer roll 5 together with the mesh belt 13.

FIG. 16 shows the fiber pile 32 immediately after being released from the concave portion 22 for accumulation according to the present embodiment. As shown in FIG. 16, in the pile 32, the portion corresponding to the middle / high recess 23 having a deep central region of the accumulation recess 22 excludes the thick portion 33 and the middle / high recess 23 having a high height. A portion corresponding to the concave portion 22 for accumulation is a thin portion 34 having a low height. Specifically, the thick portion 33 is formed with the height of the space plate 26 disposed on the medium-to-high porous plate 25, the thickness of the concave partition plate 28, and the thickness of the ring plate 29. Yes. Further, the thin portion 34 is formed by the thickness of the concave section plate 28 and the thickness of the ring plate 29 arranged on the porous plate 27.

In the fiber stacking apparatus 10 of the present embodiment, the adjusting body 20 is not disposed on the inner surface of the medium / high porous plate 25 disposed in the middle region of the middle / high recess 23 disposed in the central region of the accumulation recess 22, and The adjusting body 20 is disposed on the inner surface of the porous plate 27 disposed in the region of the accumulation recesses 22 excluding the medium / high porous plate 25. Therefore, the thick portion 33 of the piled product 32 obtained in the present embodiment is a high basis weight portion with a relatively large pile amount of the absorbent material, and the thin portion 34 is relatively It has a low basis weight with a small amount of absorbent material. Further, the entire bottom surface of the piled article 32 is substantially flat by the scuffing roll 42.

The piled material 32 transferred onto the transfer roll 5 is conveyed while receiving suction from the transfer roll 5 side, and is introduced onto a vacuum conveyor 6 disposed below the transfer roll 5. It is delivered onto a core wrap sheet 37 made of a conductive nonwoven fabric or the like. Thereafter, as shown in FIG. 9, both side portions along the conveying direction of the core wrap sheet 37 are folded back, and the upper and lower surfaces of the piled article 32 are covered with the core wrap sheet 37. And the fiber pile 32 of the state coat | covered with the core wrap sheet | seat 37 is cut | disconnected by the cutter roll 72 of the cutting device 7 in the intermediate position between adjacent

thick parts

The absorbent body 3 obtained in the present embodiment is an absorbent body that includes the thick portion 33 and the thin portion 34 and is partially different in height of the molded body material that is the raw material of the absorbent body. Due to the action of the pair of

partition plates

41 and 41 arranged in the duct 4 and the scuffing roll 42, the absorbent body 3 does not show uneven accumulation, and the absorbent body 3 is a disposable diaper or sanitary napkin. It is of high quality suitable as an absorber used for absorbent articles such as incontinence pads. Thus, according to the fiber stacking apparatus 10 and the manufacturing method using the same according to the present embodiment, it is possible to stably manufacture the absorbent body including the middle and high portions having a desired height. Further, due to the action of the adjusting body 20 described above, the thick portion 33 has a relatively high basis weight, and the thin portion 34 has a relatively low basis weight. Thus, according to the fiber stacking apparatus 10 and the manufacturing method using the same according to the present embodiment, it is possible to stably manufacture an absorbent body having a medium to high part with a desired basis weight.

The present invention (second invention) is not limited to the above-described embodiment and the above-described embodiments, and can be changed as appropriate. In addition, about other embodiment and embodiment mentioned later, the different structure part from embodiment and embodiment mentioned above is mainly demonstrated, the same code | symbol is attached | subjected to the same component and description is abbreviate | omitted. For the components that are not particularly described, the description of the above-described embodiments and embodiments is appropriately applied.

For example, in the fiber stacking apparatus 10 of the present embodiment described above, the adjusting body 20 that adjusts the suction force only on the inner surface side of the medium / high porous plate 25 (porous member) of the middle / high recess 23 of the accumulation recess 22. Is not disposed, but in the circumferential direction (2Y direction) of the rotating drum in the accumulation recess 22 in addition to the inner surface side of the medium / high porosity plate 25 (porous member) in the accumulation recess 22 in the middle / high recess 23. The form which the adjustment body 20 which adjusts suction | attraction force is not arrange | positioned may be sufficient also in the outermost edge part of the both sides along. Specifically, as shown in FIG. 17, the rotary drum 2 A of the fiber stacking device has the same medium-high porous plate 25 and space plate 26 as those constituting the rotary drum 2 of the fiber stacking device 10 of the present embodiment described above. , A porous plate 27, a recessed section plate 28, and a pair of ring plates 29, but a suction adjustment plate 24 A different from the suction adjustment plate 24 constituting the rotary drum 2 of the fiber stacking device 10. . Specifically, the suction adjustment plate 24A has openings 245s arranged at the outermost edge portions on both sides along the circumferential direction (2Y direction) of the rotating drum. The relative ratio of the plate 28 to the opening 283 is 1, and the opening area of the opening 245s disposed on the outermost edge is equal to the opening area of the opening 265 of the space plate 26 and the opening 283 of the recessed partition plate 28. It is the same. Therefore, the rotary drum 2A of the fiber stacking device is sucked on the inner surface side of the outermost edge portions on both sides along the circumferential direction (2Y direction) of the porous plate 27 of the concave portion 22 for accumulation excluding the concave portion 23 for middle and high. The adjusting body 20 for adjusting the force is not arranged. The rotary drum 2 A of the fiber stacking device adjusts the suction force also on the inner surface side of the medium / high porous plate 25 in the middle / high recess 23 in the stacking recess 22, similarly to the rotary drum 2 of the fiber stacker 10. The adjusting body 20 is not arranged. That is, the rotary drum 2A of the fiber stacking apparatus includes an outermost edge on both sides along the circumferential direction (2Y direction) and a medium / high porous plate 25 for the medium / high recess 23 in the porous plate 27 of the accumulation recess 22. An adjusting body 20 for adjusting the suction force is disposed on the inner surface side of the rotating drum 2A in the region sandwiched between the two.

According to the manufacturing method using the rotary drum 2A of the fiber stacking apparatus as described above, in the restacking process after the fiber stacking process, the rotary drum 2A of the fiber stacking apparatus is along the circumferential direction (2Y direction). Since the adjusting body 20 is not arranged on the inner surface side of the rotating drum 2A at the outermost edge of both sides, the suction force of both the outermost edges is high, and toward the both outermost edges, The molded body material that has been scraped off is easily restacked, and the molded body material returned in a scattered state is easily spread over the entire width direction (2Y direction) of the rotary drum 2, and is uniformly distributed in the accumulation recess 22. The molded body material that has been scraped off is easily re-fabricated. Thus, according to the manufacturing method using the rotating drum 2A of the fiber stacking apparatus, it is possible to more stably manufacture the absorbent body having the desired medium weight of the basis weight.

Moreover, in the fiber stacking apparatus 10 of this embodiment mentioned above, the adjustment which adjusts suction | attraction force to the inner surface side of the rotating drum 2 of the porous plate 27 (porous member) except the recessed part 23 for middle / high in the recessed part 22 for accumulation | stacking. Although the body 20 is disposed, the adjusting body 20 that adjusts the suction force may not be disposed in any region. The piled product 32 manufactured using such a rotating drum 2 is an unevenly piled product having a thick portion 33 having a high height and a thin portion 34 having a low height. The thick portion in the unevenly distributed fiber is a high basis weight portion having a relatively high basis weight, and the thin portion is a low basis weight portion having a relatively low basis weight.

Further, as shown in FIGS. 11 and 17, the rotary drum 2 includes a suction adjustment plate 24, a medium / high porous plate 25, a space plate 26, a porous plate 27, a concave partition plate 28, and a pair of ring plates 29. Although a plate is used, instead of the plate, for example, an integral plate in which a portion where the high basis weight portion is to be formed is deeply recessed may be used. In addition, by providing a plate composed of the suction adjustment plate 24, the medium / high porous plate 25, the space plate 26, the porous plate 27, the recess partitioning plate 28, and the pair of ring plates 29, an absorber having a high basis weight ratio. Can be manufactured with high accuracy.

The absorbent body produced in the present invention (second aspect) is preferably used as an absorbent body for absorbent articles. The absorbent article is mainly used to absorb and retain body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. To do.

The requirements of only one invention in the first invention and the second invention described above can be applied to other inventions as appropriate, and the requirements in each invention are appropriately interchanged between the embodiments. Is possible

The following absorber manufacturing apparatus is disclosed regarding the embodiment described above.

<1A>
An air flow generated by suction from the inside of the rotating drum, the rotating drum having a concave portion for accumulation on the outer peripheral surface, and a duct for supplying the molded material in a scattered state toward the outer peripheral surface of the rotating drum. The absorbent body manufacturing apparatus for forming the absorbent body by stacking the molded body material in the accumulation recess,
The accumulation recess has a first region and a second region deeper than the first region,
Inside the duct, the surface is arranged in a space partitioned by a hanging plate hanging down from the top surface of the duct on the downstream side in the rotation direction of the rotating drum so that the surface is in contact with the molded body material and piled up. A scuffing roll that scrapes off an excessive amount of the molded body material, and a duct opening that is arranged downstream of the scuffing roll in the rotational direction of the rotating drum and takes in outside air,
The inside of the duct is upstream of the hanging plate in the rotation direction of the rotary drum, and the fiber stacking region for excessively stacking the scattered molded body material so as to overflow from the accumulation recess, The downstream side of the rotating drum with respect to the rotating drum with respect to the drooping plate, the excess amount of the formed body material scraped off is scraped off by the scuffing roll, and the scraped-off shaped body material is put into the accumulation recess. An apparatus for manufacturing an absorbent body, which is divided by the hanging plate into a restacked fiber region to be restacked.

<2A>
In a state in which the molded material in a scattered state is stacked in the accumulation recess, the flow rate of outside air taken in from the duct opening between the scuffing roll and the top surface of the duct is determined by the scuffing roll and the scuffing roll. The apparatus for manufacturing an absorbent body according to <1A>, wherein the apparatus is faster than the flow rate of outside air taken in from the duct opening between the rotating drums.
<3A>
The flow rate (V1) of the outside air taken in from the duct opening between the scuffing roll and the top surface of the duct with respect to the flow velocity (V2) of the outside air taken in from the duct opening of the scuffing roll and the rotating drum. Ratio (V1 / V2) is 1 or more and 4 or less, Preferably it is 1.5 or more and 3 times or less, The manufacturing apparatus of the absorber as described in said <2A>.
<4A>
The flow velocity (V1) of the outside air taken in from the duct opening between the scuffing roll and the top surface of the duct is 5 m / s or more and 100 m / s or less, preferably 10 m / s or more and 70 m / s or less. The manufacturing apparatus of the absorber as described in <2A> or <3A>.
<5A>
The flow rate (V2) of the outside air taken in from the duct opening of the scuffing roll and the rotating drum is 0.1 m / s or more and 70 m / s or less, preferably 0.1 m / s or more and 50 m / s or less. <2A> to <4A> The absorbent body manufacturing apparatus according to any one of <4A>.
<6A>
The absorber manufacturing apparatus according to any one of <1A> to <5A>, wherein the duct opening includes an outside air amount adjusting unit that adjusts an opening area of the duct opening to adjust an amount of outside air to be taken in.
<7A>
The absorber manufacturing apparatus according to any one of <1A> to <6A>, wherein a closing plate that closes the rotating drum is disposed in the duct opening.
<8A>
The closing plate is disposed over the entire width of the duct opening of the duct, and is configured to be movable from the top surface side of the duct to the rotating drum side of the duct opening. Absorber manufacturing equipment.
<9A>
The apparatus for manufacturing an absorbent body according to any one of <1A> to <8A>, wherein the duct opening is provided at a position on a top surface side of the duct with respect to a height direction of the duct.
<10A>
The apparatus for manufacturing an absorbent body according to any one of <1A> to <9A>, wherein the duct opening is provided above the rotating drum with respect to a rotating shaft of the scuffing roll.

<11A>
The absorber according to any one of <1A> to <10A>, wherein the rotating drum has a plurality of spaces partitioned therein, and has suction force adjusting means for adjusting the suction force of each space. Manufacturing equipment.
<12A>
The rotating drum manufacturing apparatus according to <11A>, wherein the rotating drum has a space A and a space B which are the spaces in a region where the outer peripheral surface is covered with the duct.
<13A>
The apparatus for manufacturing an absorbent body according to <12A>, wherein the space A and the space B are maintained at a negative pressure.
<14A>
The apparatus for manufacturing an absorbent body according to <13A>, wherein the negative pressure in the space B is set to be equal to or weaker than the negative pressure in the space A.
<15A>
The apparatus for manufacturing an absorbent body according to <14A>, wherein the negative pressure in the space B is set to a negative pressure that is weaker than the negative pressure in the space A.
<16A>
The absorbent body manufacturing apparatus according to any one of <1A> to <15A>, wherein the second region is formed by a middle-high recess provided in a central region of the accumulation recess.
<17A>
While the accumulation concave portion of the rotating drum passes over the space A maintained at a negative pressure, a porous plate and a medium / high porous plate constituting the bottom surfaces of the first region and the second region The absorbent body manufacturing apparatus according to any one of <12A> to <16A>, wherein suction from the suction unit is performed through
<18A>
The rotating drum includes a cylindrical drum body, a suction adjustment plate fixed to be overlapped on the outer periphery of the drum body, and a medium-to-high porous plate (porous) fixed to the outer surface side of the suction adjustment plate. Member), a space plate fixed on the outer surface side of the medium / high porous plate, a porous plate (porous member) fixed on the outer surface side of the space plate, and a porous plate The manufacturing of the absorbent body according to any one of the above items <1A> to <17A>, comprising: a recessed partition plate fixed to be overlapped on the outer surface side; and a ring plate fixed to be overlapped on the outer surface side of the recessed partition plate apparatus.
<19A>
The concave section plate has a plurality of cross-shaped openings penetrating in the thickness direction in plan view, a cross-shaped opening defining member for partitioning each cross-shaped opening section, and penetrating in the thickness direction. The apparatus for manufacturing an absorbent body according to <18A>, further including a plurality of openings and an opening defining part that partitions the openings.
<20A>
The porous plate has a plurality of cross-shaped openings in plan view,
The <18A> or <19A>, wherein the cross-shaped opening of the porous plate is disposed at the same position as each cross-shaped opening of the concave partition plate fixed to the outer surface of the porous plate. The manufacturing apparatus of the absorber as described in>.
<21A>
The space plate has an annular defining member formed along the outline of each cross-shaped opening of the porous plate in plan view,
The medium / high porous plate not only has a congruent outline with the annular defining member, but also has an overall shape of both the opening of the porous plate and the cross-shaped opening of the concave partition plate. The apparatus for manufacturing an absorbent body according to any one of the above items <18A> to <20A>, wherein the planar views have a congruent relationship with each other.

<22A>
The apparatus for manufacturing an absorbent body according to any one of <1A> to <21A>, wherein the duct opening is formed at an outlet located at the most downstream side in the rotation direction of the rotating drum in the duct.
<23A>
In the inside of the duct on the upstream side in the rotation direction of the rotating drum from the hanging plate, a pair of partition plates disposed on both sides along the circumferential direction of the rotating drum,
The molded material in a scattered state is excessively stacked by the pair of partition plates so as to overflow from the stacking recesses to a region corresponding to the space between the pair of partitioning plates in the stacking recesses. An excessive amount of the molded body material was scraped off with the scuffing roll, and the molded body material scraped off in the partitioned space was re-stacked on both sides of the excessively piled portion in the accumulation recess. The absorbent manufacturing apparatus according to any one of the above items <1A> to <22A>, which is fine.
<24A>
Each of the bottom surface of the second region and the bottom surface of the first region is composed of a porous member having many suction holes,
On the inner surface side of the porous member in the concave portion for accumulation, an adjusting body for adjusting the suction force is disposed so as to overlap the inner surface of the porous member,
The adjustment body has a plurality of openings penetrating the adjustment body in the thickness direction, and a part of the opening is relative to an opening portion of the concave portion for accumulation relatively far from the porous member. The manufacturing apparatus for an absorbent body according to any one of the above items <1A> to <23A>, which has a smaller opening area than a relatively close opening.
<25A>
An adjusting body for adjusting the suction force is not disposed on the inner surface side of the porous member in the second region, and the suction hole of the porous member has an opening area on the outer surface side and an opening area on the inner surface side. The manufacturing apparatus of the absorber as described in <24A> which is the same.
<26A>
The pair of partition plates are inclined toward the rotating drum so that the interval between the pair is gradually narrowed,
The absorbent body manufacturing apparatus according to any one of <1A> to <25A>, wherein an interval between end portions of the pair of partition plates on the rotating drum side coincides with a width of the second region.
<27A>
The drooping plate is formed in the shape of a convex arc from the top surface of the duct to the upstream side in the circumferential direction (2X direction) of the rotating drum over the entire width of the duct. The manufacturing apparatus of the absorber of any one of>.
<28A>
The absorbent body manufacturing apparatus according to any one of <1A> to <27A>, wherein the molded body material includes a fiber material.
<29A>
The absorbent body manufacturing apparatus according to any one of <1A> to <28A>, wherein the molded body material includes a water-absorbing polymer together with a fiber material.
<30A>
The scuffing roll has any one of the above items <1A> to <29A>, which includes a cylindrical roll body and a large number of scraping protrusions standing on the outer peripheral surface of the roll body. Absorber manufacturing equipment.
<31A>
The absorber according to any one of <1A> to <30A>, wherein the scuffing roll rotates so that a surface facing the rotating drum moves in a direction opposite to a rotating direction of the rotating drum. Manufacturing equipment.
<32A>
The circumferential speed of the scuffing roll is 2 times or more and 10 times or less, preferably 3 times or more and 5 times or less as compared with the circumferential speed of the rotating drum, according to any one of the above items <1A> to <31A> Absorber manufacturing equipment.
<33A>
The absorbent body manufacturing apparatus according to any one of <1A> to <32A>, wherein the absorbent body is used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, panty liners, and the like.

<1B>
An air flow generated by suction from the inside of the rotating drum, the rotating drum having a concave portion for accumulation on the outer peripheral surface, and a duct for supplying the molded material in a scattered state toward the outer peripheral surface of the rotating drum. The absorbent body manufacturing apparatus for forming the absorbent body by stacking the molded body material in the accumulation recess,
The accumulation recess has a first region and a second region deeper than the first region,
Inside the duct, a pair of partition plates disposed on both sides along the circumferential direction of the rotating drum, and an excessive amount of the molded body material disposed so as to contact the molded body material and stacked. A scuffing roll to scrape off,
The pair of partition plates are arranged so that the molded material in a scattered state is excessively stacked so as to overflow from the accumulation recesses into a corresponding region between the pair of partition plates in the accumulation recesses. Arranged with a gap between the pair of partition plates,
The scuffing roll scrapes off an excessive amount of the molded body material stacked in a corresponding region between the pair of partition plates, and the scraped molded body material is excessively stacked in the accumulation recess. An apparatus for manufacturing an absorbent body arranged at a position spaced apart from the pair of partition plates on the downstream side in the rotational direction of the rotating drum so as to be restacked on both sides of the part.

<2B>
In the inside of the duct, there is a hanging plate that hangs down from the top surface of the duct between the pair of partition plates and the scuffing roll, and the inside of the duct is upstream in the rotational direction by the hanging plate. And the manufacturing apparatus of the absorbent body according to <1B>, which is divided into a restacked fiber region on the downstream side in the rotation direction.
<3B>
Each of the bottom surface of the second region and the bottom surface of the first region is composed of a porous member having many suction holes,
On the inner surface side of the porous member in the first region, an adjustment body for adjusting the suction force is disposed so as to overlap the inner surface of the porous member,
The adjustment body has a plurality of openings penetrating the adjustment body in the thickness direction, and a part of the opening is relative to an opening portion of the concave portion for accumulation relatively far from the porous member. The manufacturing apparatus of the absorber as described in said <1B> or <2B> whose opening area is small compared with the opening part of the nearer one.
<4B>
In addition to the inner surface side of the porous member in the second region or the inner surface side of the porous member in the second region, the outermost edge portions of both side portions along the circumferential direction of the rotating drum in the accumulation recess The adjusting body for adjusting the suction force is not disposed on the inner surface side, and the suction hole of the porous member has the same opening area on the outer surface side and the opening area on the inner surface side as described in <3B>. Absorber manufacturing equipment.
<5B>
The pair of partition plates are inclined toward the rotating drum so that the interval between the pair is gradually narrowed,
The absorbent body manufacturing apparatus according to any one of <1B> to <4B>, wherein an interval between ends of the pair of partition plates on the rotating drum side coincides with a width of the second region.
<6B>
The absorbent body manufacturing apparatus according to any one of <1B> to <5B>, wherein the second region is formed by a middle-high recess formed in a central region of the accumulation recess.
<7B>
<1B> to <6B>, wherein the partition plate has a substantially right triangular cross section or a quadrangular pyramid shape having a trapezoidal cross section whose upper base is extremely narrower than a lower base. Absorber manufacturing equipment.
<8B>
The scuffing roll is disposed on the downstream side of the region of the space B of the rotating drum inside the duct,
A known exhaust device such as an intake fan is connected to the space B of the rotary drum, and the space B can be maintained at a negative pressure by operating the exhaust device. <1B> to <7B The manufacturing apparatus of the absorber of any one of>.
<9B>
The scuffing roll has any one of the above items <1B> to <8B>, which includes a cylindrical roll body and a large number of scraping protrusions standing on the outer peripheral surface of the roll body. The absorber manufacturing apparatus as described.
<10B>
In the drum width direction of the scuffing roll, the roll body is arranged over the entire width of the rotary drum, and a large number of protrusions are arranged at least in the region on the second region in the central region of the accumulation recess. The manufacturing apparatus for an absorbent body according to any one of <1B> to <9B>.
<11B>
The absorbent according to any one of <1B> to <10B>, wherein the scuffing roll is rotated such that a surface facing the rotating drum moves in a direction opposite to a rotating direction of the rotating drum. Manufacturing equipment.
<12B>
The peripheral speed of the scuffing roll is preferably 2 times or more and 10 times or less, more preferably 3 times or more and 5 times or less as compared with the peripheral speed of the rotating drum. <1B> to <11B The manufacturing apparatus of the absorber of any one of>.

<13B>
The absorber manufacturing apparatus has a hanging plate hanging from the top surface of the duct between the pair of partition plates and the scuffing roll inside the duct,
The drooping plate is formed in a convex arc shape from the top surface of the duct to the upstream side in the circumferential direction of the rotating drum over the entire width of the duct, and any of the above <1B> to <12B> The absorbent body manufacturing apparatus according to claim 1.
<14B>
The absorber manufacturing apparatus has a hanging plate hanging from the top surface of the duct between the pair of partition plates and the scuffing roll inside the duct,
The drooping plate hangs down to a position where the tip of the drooping plate does not touch the top of an excessive amount of the molded material piled up so as to overflow, according to any one of the above items <1B> to <13B> Absorber manufacturing equipment.
<15B>
A duct that supplies a molding material to the outer peripheral surface of the rotating drum, and is arranged obliquely below the rotating drum and rotates in the direction of arrow R5 that is the forward direction with respect to the conveying direction of the core wrap sheet that constitutes the absorber. The absorbent body manufacturing apparatus according to any one of <1B> to <14B>, comprising a driven transfer roll, a vacuum conveyor disposed below the transfer roll, and a cutting device.
<16B>
Further, a vacuum box is provided between the duct and the transfer roll in the circumferential direction of the rotary drum, and a mesh belt is provided between the vacuum box and the rotary drum and between the transfer roll and the rotary drum. The absorbent body manufacturing apparatus according to any one of the above items <1B> to <15B>, which is arranged to pass through.
<17B>
The absorber manufacturing apparatus has a hanging plate hanging from the top surface of the duct between the pair of partition plates and the scuffing roll inside the duct,
The absorber manufacturing apparatus according to any one of <1B> to <16B>, wherein the windshield plate is provided in proximity to an outer peripheral surface of a transfer roll.
<18B>
The absorbent body manufacturing apparatus according to any one of <1B> to <17B>, wherein the molded body material includes a fiber material.
<19B>
As the molding material, pulp fibers such as defibrated pulp, short fibers of cellulosic fibers such as rayon fibers and cotton fibers, short fibers of synthetic fibers such as polyethylene, etc. are used. <1B> to <18B> The manufacturing apparatus of the absorber of any one of.
<20B>
The apparatus for producing an absorbent body according to any one of <1B> to <19B>, wherein a water-absorbing polymer is used as the molded body material together with a fiber material.
<21B>
When the absorbent body is an absorbent body used for absorbent articles such as disposable diapers and sanitary napkins, the molded body material is any one of the above items <1B> to <20B>, which is an absorbent body material. Absorber manufacturing equipment.
<22B>
The lower end of the pair of partition plates closest to the rotating drum is a cross-sectional view in the direction of the rotation axis of the rotating drum, and extends from a side wall that forms the duct to a position that covers a side portion along the circumferential direction of the accumulation recess. The absorbent manufacturing apparatus according to any one of <1B> to <21B>, which is extended.
<23B>
A manufacturing method of an absorbent body comprising a stacking step of supplying a molded body material in a scattered state to a rotating drum having a stacking recess on an outer peripheral surface, and stacking the molded body material in the stacking recess. ,
In the stacking step, the pair of partition plates is used to excessively stack the molded material in a scattered state so as to overflow into a corresponding region between the pair of partition plates in the accumulation recess,
After the fiber stacking step, the molded material that has been excessively stacked is scraped off, and the scraped-up molded material is restacked on both sides of the excessively stacked portion of the accumulation recess. The manufacturing method of the absorber which comprises a fiber process.
<24B>
In the restacking step, the absorbent body manufacturing method according to <23B>, in which the molded material that has been excessively stacked is scraped off using a scuffing roll.
<25B>
The bottom surface of the piled product obtained by spreading the formed body material in the concave portion for accumulation is substantially flat throughout the scuffing roll,
The piled material covered with the core wrap sheet is cut together with the core wrap sheet by a cutter roll of a cutting device at an intermediate position between adjacent thick portions, and the core wrap sheet is cut into the core wrap sheet. The manufacturing method of the absorber as described in said <23B> or <24B> from which the coated absorber is obtained.
<26B>
The scuffing roll is spaced apart from the pair of partition plates on the downstream side in the rotational direction of the rotating drum, and the restacking step is performed downstream of the pair of partition plates in the rotational direction. The method for producing an absorbent body according to any one of <23B> to <25B>.

According to the present invention (first invention), the molded body material scraped off by the scuffing roll can be easily peeled off from the protrusion of the scuffing roll, and an absorbent body having a desired middle height can be stably produced.

According to this invention (2nd invention), an absorber provided with the middle-high part of desired height can be manufactured stably.

Claims

An air flow generated by suction from the inside of the rotating drum, the rotating drum having a concave portion for accumulation on the outer peripheral surface, and a duct for supplying the molded material in a scattered state toward the outer peripheral surface of the rotating drum. The absorbent body manufacturing apparatus for forming the absorbent body by stacking the molded body material in the accumulation recess,
The accumulation recess has a first region and a second region deeper than the first region,
Inside the duct, the surface is arranged in a space partitioned by a hanging plate hanging down from the top surface of the duct on the downstream side in the rotation direction of the rotating drum so that the surface is in contact with the molded body material and piled up. A scuffing roll that scrapes off an excessive amount of the molded body material, and a duct opening that is arranged downstream of the scuffing roll in the rotational direction of the rotating drum and takes in outside air,
The inside of the duct is upstream of the hanging plate in the rotation direction of the rotary drum, and the fiber stacking region for excessively stacking the scattered molded body material so as to overflow from the accumulation recess, The downstream side of the rotating drum with respect to the rotating drum with respect to the drooping plate, the excess amount of the formed body material scraped off is scraped off by the scuffing roll, and the scraped-off shaped body material is put into the accumulation recess. An apparatus for manufacturing an absorbent body, which is divided by the hanging plate into a restacked fiber region to be restacked.
In a state in which the molded material in a scattered state is stacked in the accumulation recess, the flow rate of outside air taken in from the duct opening between the scuffing roll and the top surface of the duct is determined by the scuffing roll and the scuffing roll. The manufacturing apparatus of the absorber of Claim 1 which is faster than the flow velocity of the external air taken in from the said duct opening part between rotary drums.
3. The absorber manufacturing apparatus according to claim 1 or 2, wherein the duct opening portion has an outside air amount adjusting means for adjusting an opening area to adjust an amount of outside air to be taken in.
The absorbent body according to any one of claims 1 to 3, wherein the rotating drum has a plurality of spaces partitioned therein, and has suction force adjusting means for adjusting the suction force of each space. apparatus.
The absorber manufacturing apparatus according to any one of claims 1 to 4, wherein the duct opening is formed at an outlet located at the most downstream in the rotation direction of the rotating drum in the duct.
In the inside of the duct on the upstream side in the rotation direction of the rotating drum from the hanging plate, a pair of partition plates disposed on both sides along the circumferential direction of the rotating drum,
The molded material in a scattered state is excessively stacked by the pair of partition plates so as to overflow from the stacking recesses to a region corresponding to the space between the pair of partitioning plates in the stacking recesses. An excessive amount of the molded body material was scraped off with the scuffing roll, and the molded body material scraped off in the partitioned space was re-stacked on both sides of the excessively piled portion in the accumulation recess. 6. The absorbent body producing apparatus according to claim 1, wherein the absorbent body is fine.
Each of the bottom surface of the second region and the bottom surface of the first region is composed of a porous member having many suction holes,
On the inner surface side of the porous member in the concave portion for accumulation, an adjusting body for adjusting the suction force is disposed so as to overlap the inner surface of the porous member,
The adjustment body has a plurality of openings penetrating the adjustment body in the thickness direction, and a part of the opening is relative to an opening portion of the concave portion for accumulation relatively far from the porous member. The absorbent manufacturing apparatus according to any one of claims 1 to 6, wherein the opening area is smaller than that of the closest opening.
An adjusting body for adjusting the suction force is not disposed on the inner surface side of the porous member in the second region, and the suction hole of the porous member has an opening area on the outer surface side and an opening area on the inner surface side. The manufacturing apparatus of the absorber according to claim 7 which is the same.
In the inside of the duct on the upstream side in the rotation direction of the rotating drum from the hanging plate, a pair of partition plates disposed on both sides along the circumferential direction of the rotating drum,
The pair of partition plates are inclined toward the rotating drum so that the interval between the pair is gradually narrowed,
The absorbent body manufacturing apparatus according to any one of claims 1 to 8, wherein an interval between end portions of the pair of partition plates on the rotating drum side matches a width of the second region.
The absorber manufacturing apparatus according to any one of claims 1 to 9, wherein the duct opening is provided at a position on a top surface side of the duct with respect to a height direction of the duct.
The absorber manufacturing apparatus according to any one of claims 1 to 10, wherein the duct opening is provided above the rotating drum with respect to a rotating shaft of the scuffing roll.
Furthermore, in the inside of the duct, provided with a pair of partition plates arranged on both sides along the circumferential direction of the rotating drum,
The pair of partition plates are arranged so that the molded material in a scattered state is excessively stacked so as to overflow from the accumulation recesses into a corresponding region between the pair of partition plates in the accumulation recesses. Arranged with a gap between the pair of partition plates,
The scuffing roll scrapes off an excessive amount of the molded body material stacked in a corresponding region between the pair of partition plates, and the scraped molded body material is excessively stacked in the accumulation recess. The absorbent body manufacturing apparatus according to claim 1, wherein the absorbent body manufacturing apparatus is disposed at a position spaced apart from the pair of partition plates on the downstream side in the rotation direction of the rotating drum so as to be restacked on both side portions of the part.
In the inside of the duct, between the pair of partition plates and the scuffing roll, a hanging plate hanging from the top surface of the duct,
The manufacturing apparatus of the absorbent body according to claim 12, wherein the inside of the duct is divided into a stacking fiber region upstream in the rotation direction and a restacking fiber region downstream in the rotation direction by the hanging plate.
Each of the bottom surface of the second region and the bottom surface of the first region is composed of a porous member having many suction holes,
On the inner surface side of the porous member in the first region, an adjustment body for adjusting the suction force is disposed so as to overlap the inner surface of the porous member,
The adjustment body has a plurality of openings penetrating the adjustment body in the thickness direction, and a part of the opening is relative to an opening portion of the concave portion for accumulation relatively far from the porous member. The manufacturing apparatus of the absorber of Claim 12 or 13 whose opening area is small compared with the opening part of the nearer one.
In addition to the inner surface side of the porous member in the second region or the inner surface side of the porous member in the second region, the outermost edge portions of both side portions along the circumferential direction of the rotating drum in the accumulation recess The absorption body according to claim 14, wherein an adjustment body for adjusting suction force is not disposed on the inner surface side, and the suction hole of the porous member has the same opening area on the outer surface side and opening area on the inner surface side. Body manufacturing equipment.
The lower end of the pair of partition plates closest to the rotating drum is a cross-sectional view in the direction of the rotation axis of the rotating drum, and extends from a side wall that forms the duct to a position that covers a side portion along the circumferential direction of the accumulation recess. The absorbent manufacturing apparatus according to any one of claims 12 to 15, which is extended.
The pair of partition plates are inclined toward the rotating drum so that the interval between the pair is gradually narrowed,
The absorbent body manufacturing apparatus according to any one of claims 12 to 16, wherein an interval between end portions of the pair of partition plates on the rotating drum side coincides with a width of the second region.
The absorber according to any one of claims 12 to 17, wherein the partition plate has a substantially right triangular cross section or a quadrangular pyramid shape having a trapezoidal cross section whose upper base is extremely narrower than a lower base. Manufacturing equipment.
In the drum width direction of the scuffing roll, the roll body is arranged over the entire width of the rotary drum, and a large number of protrusions are arranged at least in the region on the second region in the central region of the accumulation recess. The absorbent manufacturing apparatus according to any one of claims 12 to 18.
The absorber manufacturing apparatus has a hanging plate hanging from the top surface of the duct between the pair of partition plates and the scuffing roll inside the duct,
The absorbent body according to any one of claims 12 to 19, wherein the drooping plate hangs down to a position where the tip of the drooping plate does not touch the top of an excessive amount of the molded material piled up so as to overflow. Manufacturing equipment.
21. The suspension board according to claim 1, wherein the hanging plate is formed in a convex arc shape from the top surface of the duct toward the upstream side in the circumferential direction of the rotating drum over the entire width of the duct. The manufacturing apparatus of the absorber of description.
The absorber manufacturing apparatus according to any one of claims 1 to 21, wherein the second region is formed by a middle-high recess formed in a central region of the accumulation recess.
The absorbent body manufacturing apparatus according to any one of claims 1 to 22, wherein the molded body material includes a fiber material.
The absorbent body manufacturing apparatus according to any one of claims 1 to 23, wherein the molded body material includes a water-absorbing polymer together with a fiber material.
The absorbent body manufacturing apparatus according to any one of claims 1 to 24, wherein the absorbent body is used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, and panty liners.
A manufacturing method of an absorbent body comprising a stacking step of supplying a molded body material in a scattered state to a rotating drum having a stacking recess on an outer peripheral surface, and stacking the molded body material in the stacking recess. ,
In the stacking step, the pair of partition plates is used to excessively stack the molded material in a scattered state so as to overflow into a corresponding region between the pair of partition plates in the accumulation recess,
After the fiber stacking step, the molded material that has been excessively stacked is scraped off, and the scraped-up molded material is restacked on both sides of the excessively stacked portion of the accumulation recess. The manufacturing method of the absorber which comprises a fiber process.
27. The method for manufacturing an absorbent body according to claim 26, wherein, in the re-stacking step, the molding material that has been excessively stacked is scraped off using a scuffing roll.
The bottom surface of the piled product obtained by spreading the formed body material in the concave portion for accumulation is substantially flat throughout the scuffing roll,
The piled material covered with the core wrap sheet is cut together with the core wrap sheet by a cutter roll of a cutting device at an intermediate position between adjacent thick portions, and the core wrap sheet is cut into the core wrap sheet. The method for producing an absorbent body according to claim 27, wherein a coated absorbent body is obtained.
The scuffing roll is disposed at a position downstream of the pair of partition plates in the rotational direction of the rotating drum, and the restacking step is performed downstream of the pair of partition plates in the rotational direction. Item 29. The method for producing an absorber according to Item 27 or 28.