JP6982893B2 - Vertical filling and packaging machine and filling and packaging method for objects to be packaged - Google Patents

Description

The present invention relates to a filling and packaging machine and a filling and packaging method for producing a package by manufacturing a long plastic film and filling and packaging liquid, viscous, powdery and other objects to be packaged.

It is possible to automatically fill and package a packaged object consisting of food and drink, seasoning liquid, pharmaceuticals, chemicals and other liquids, viscous substances or powders / granules while molding a soft plastic film into a bag shape. As for the packaging machine, there is one as described in Patent Document 1.

Japanese Patent No. 2991104

In Patent Document 1, a long plastic film that is continuously transferred is folded in half along the longitudinal direction, and the folded ends are heat-sealed with a vertical heat seal roll to form a tubular body, and then the tubular body is formed. Disclosed is a packaging machine that continuously forms a packaging bag by filling the contents into a container and forming a horizontal sealing portion that serves as a bottom portion and a bag opening portion with a pair of horizontal heat-sealing rolls. In this filling and packaging machine, a vertical sealing mechanism is used as a feeding mechanism for a long film that is continuously transferred, and a registration mark provided on the film is detected by a registration mark detection device, and based on the detection time of the registration mark, the registration mark is detected. It has been proposed to accelerate / decelerate the motor of the vertical sealing mechanism so that the feeding speed of the plastic film becomes constant.

Since the conventional filling and packaging machine relies on the vertical sealing mechanism for continuous feeding of the long plastic film as described above, the vertical sealing mechanism feeds out the plastic film and to the side edge of the plastic film. It plays two roles for the continuous formation of the vertical seal portion of. That is, in the vertical sealing mechanism, the plastic film is heated and pressurized by the pair of vertical heat sealing rolls to melt the plastic film, and the melted plastic film is sandwiched and sent out. Therefore, for example, the plastic film is excessively melted. Then, the plastic film cannot be sent out as expected and meanders, causing wrinkles and twists on the plastic film. On the contrary, if the plastic film is insufficiently melted, the seal portion may be peeled off. Therefore, it is necessary to determine the sealing conditions while balancing the two (sending out of the plastic film and fusion splicing), and the problem is that the allowable range of the sealing conditions for the vertical heat seal roll becomes narrow (strict). was there.

In addition, the wide plastic film used when forming a large-capacity package or a package with multiple rows is susceptible to uneven thickness (difference in thickness), and the left and right length of the film is 0.1. A difference of about 1.0% may occur. When such a wide film is made into a bag using the above-mentioned conventional filling and packaging machine, the film meanders due to the difference in length between the left and right sides. For example, when the film is folded in two at the center position in the width direction, the side edges are separated from each other. It was not possible to overlap them accurately, and there was a risk that the end faces would be misaligned (ear misalignment).

Therefore, in the present invention, the heat-sealing conditions of the vertical heat-sealing roll can be relaxed, the meandering of the plastic film is suppressed, the package is not wrinkled or twisted, and the vertical sealing position is obtained. It is an object of the present invention to provide a vertical filling / packaging machine and a filling / packaging method capable of suppressing the occurrence of ear misalignment at the side edge of a film.

In order to achieve the above object, the present invention is a vertical filling and packaging machine for continuously producing a filling package in which an object to be packed is filled in a plastic film packaging bag.
At least the non-folded side ends of one continuously unfolded long plastic film used by folding in the width direction, or both side ends of two continuously unwound long plastic films, respectively. A pair of vertical seal rolls that continuously form one tubular body by sequentially vertically sealing while continuously feeding out in the longitudinal direction.
The tubular body is provided with a horizontal seal roll for continuously making a bag by applying horizontal seals to the tubular body at predetermined intervals in the longitudinal direction while filling the packaged object.
The position upstream of the longitudinal sealing rolls is less and also the both side edge portions of at least the non-folded end and folded portion, or overlapping two of the plastic film of one of the plastic film made by folding in the width direction At the position, one or more infeed roll pairs that sandwich the plastic film and continuously feed it in the longitudinal direction are arranged, and at a position downstream of the vertical seal roll, at least at both end portions of the tubular body. At the position, one or more outfeed roll pairs that continuously pull out the tubular body in the longitudinal direction are arranged .
The in-feed roll pair and the out-feed roll pair are controlled so that the tension applied to the plastic film on the upstream side and the tubular body on the downstream side of the vertical seal roll running between these roll pairs is constant. It is a vertical filling and packaging machine characterized in that it is to be used.

Further, the present invention is a method for continuously producing a packed package formed by filling a plastic film packaging bag with an object to be packaged.
At least the non-folded side ends of one continuously unfolded long plastic film used by folding in the width direction, or both side ends of two continuously unwound long plastic films, respectively. , A tubular body forming step of forming a tubular body by sequentially vertically sealing while continuously feeding out in the longitudinal direction with a pair of vertical seal rolls.
There is a bag making process in which the package is continuously made by applying horizontal seals to the tubular body at predetermined intervals in the longitudinal direction while filling the object to be packaged with a horizontal seal roll. death,
At least a non-folded end and folded portion of a sheet of the plastic film made by folding in the width direction, or overlapping two at least both side edge portions of the front Kipu Las plastic film respectively, distribution position upstream of the longitudinal sealing rolls It is sandwiched by the provided infeed roll pair, and the plastic film is continuously fed out in the longitudinal direction by the rotation of the infeed roll pair, and at the same time.
At least both end portions of the tubular body are sandwiched by one or more outfeed roll pairs provided downstream of the vertical seal roll, and the rotation of the outfeed roll pair causes the tubular body to be continuous in the longitudinal direction. Pull out to
The tension applied to the plastic film on the upstream side and the tubular body on the downstream side of the vertical seal roll running between the in-feed roll pair and the out-feed roll pair is constant. It is a filling and packaging method for an object to be packaged, which is characterized by controlling.
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According to the vertical filling and packaging machine and the filling and packaging method of the object to be packaged according to the present invention, an in-feed roll pair is provided at the upstream position of the vertical seal roll, and an out-feed roll pair is provided at the downstream position of the vertical seal roll. By providing and continuously feeding out the plastic film by these roll pairs, the vertical heat-sealing roll, which has conventionally played the role of a feed roll, only needs to be heat-sealed, and the vertical sealing condition (vertical sealing condition ( The setting of temperature, pressure, etc.) is relaxed and becomes flexible, and vertical heat sealing can be performed without causing sealing failure in various plastic films.

Further, according to the present invention, the plastic film is fed out from the film roll formed by winding the plastic film by the in-feed roll pair, and the delivered plastic film is pulled out by the out-feed roll pair. , The plastic film can be run stably without meandering.

Further, in the present invention, the in-feed roll pair and the out-feed roll pair are controlled so that the tension of the plastic film (cylindrical body) running between the roll pairs becomes constant, so that the plastic film (cylindrical body) is controlled. ) Does not cause slack, wrinkles and weeping can be suppressed, and the plastic films can be overlapped exactly without being affected by the uneven thickness of the plastic film, and at the side edges. There is no risk of misalignment of the ears or misalignment of the vertical seal position.

It is a schematic diagram which shows one Embodiment of the vertical filling and packaging machine of this invention.

FIG. 1 is a schematic view showing an embodiment of a vertical filling / packaging machine according to the present invention, and the present invention will be described based on the drawings.

In the vertical filling and packaging machine shown in FIG. 1, for example, a base film layer made of a uniaxially or biaxially stretched polyethylene terephthalate film layer, a nylon resin film layer, or the like, and a sealant layer made of a non-stretched polyethylene layer, a polypropylene layer, or the like are used. The plastic film F is continuously fed from the upper side to the lower side from the film roll R around which the plastic film F formed by laminating the plastic film F is wound, and is guided by the guide rod 1 during the feeding traveling. The plastic film F is folded back in the width direction so that the sealant layers face each other, and both end portions thereof are overlapped with each other.

Next, it is folded back as described above by a pair of front and rear infeed rolls 8 (in the horizontal plane, it extends in parallel in the front-back direction in the figure. In the figure, only the front side located on the front side is shown). While sandwiching the side end portion 6 and the folded portion 7 of the stacked plastic films F, the plastic film F is continuously fed to the lower side in the figure based on the rotation of the infeed roll 8.

Subsequently, the plastic film is rotated under the rotation of a pair of vertical seal rolls 2 (in the horizontal plane, extending in parallel in the front-rear direction in the figure. In the figure, only the one on the front side located on the front side is shown). By heating and pressurizing the side end portion of F, the facing sealant layers are continuously fused and joined in the longitudinal direction (longitudinal direction) to form a vertical seal portion 4, thereby forming a tubular body 5. do.

Such a pair of vertical seal rolls 2 has a circular flange-shaped seal bar 3 on the outer peripheral surface, and also has a built-in heater that contributes to heating of the seal bar 3.
The pair of vertical seal rolls 2 seals the overlapped side end 6 of the plastic film F by pressing the front vertical seal roll 2 toward the rear vertical seal roll 2 with a pair of cylinders (not shown). It is sandwiched between the bars 3 and heated and pressurized to be fused in a palm-like shape to form a vertical seal portion 4 to form a tubular body 5.

As another embodiment, a seal bar 3 is further provided at a position of the vertical seal roll 2 corresponding to the folded portion 7 of the folded plastic film F on the guide rod 1, and the vertical seal roll 2 is used to cover the plastic film F. A vertical seal portion 4 may be formed on each of the overlapped side end portion 6 and the folded portion 7.
Further, the tubular body 5 is formed by folding one long plastic film F in the width direction as described above, and also forming two plastic films F unwound by using two film rolls R. You may superimpose and heat and pressurize both end portions thereof in the longitudinal direction to form a vertical seal portion 4, thereby forming a tubular body 5. In this case, the guide rod 1 does not exist, and the vertical seal roll 2 requires seal bars 3 at both end portions of the plastic film F.

The tubular body 5 formed as described above has a pair of outfeed rolls 9 (in the horizontal plane, extending in parallel in the front-rear direction in the figure. In the figure, only the one on the front side located on the front side is used. The ends on both sides are sandwiched by (shown), and are pulled out to the lower side in the figure based on the rotation of the outfeed roll 9.

The in-feed roll 8 and the out-feed roll 9 are preferably driven to rotate in opposite directions and at a constant speed by a motor via a gear set, for example, from a control unit of a vertical filling / packaging machine. The plastic film F (cylindrical body 5) can be continuously pulled out by rotationally driving the plastic film F (cylindrical body 5) at a predetermined speed while sandwiching the plastic film F (cylindrical body 5).

The inside of the tubular body 5 formed as described above is continuously filled with the packaged object M supplied from a tank (not shown) via a pump (not shown) and a supply path, respectively, from the filling nozzle 11. ..

In the pair of horizontal seal rolls 10, the traveling tubular body 5 is sandwiched, and the squeezed out position is heated while squeezing out the packed object to be packed at a predetermined interval in the longitudinal direction of the tubular body 5. And by applying pressure to form the horizontal seal portion 12, the package W whose upper and lower end portions are surrounded by the horizontal seal portion 12 and whose both end portions are surrounded by the vertical seal portion 4 (left side in the figure) and the folded portion 7 is formed. The bag can be made in a state where the plastic film F is connected in the longitudinal direction.

The pair of horizontal seal rolls 10 are extended in parallel in the front-rear direction in the figure (only the one on the front side located on the front side is shown in the figure), and they are reversed by a motor via a gear set. It is driven to rotate in a direction and at a constant speed. For example, the lateral seal roll 10 has a plurality of heat seal bars 13 located at equal intervals on the outer peripheral surface thereof and extending in the axial direction, and the tubular body 5 is formed by the heat seal bars 13 facing each other. By sandwiching and heating the tubular body 5, the lateral seal portion 12 can be formed over the entire width of the tubular body 5 in a direction orthogonal to the traveling direction.

As the horizontal sealing means, a pair of horizontal sealing rolls may be provided in two stages. In that case, the tubular body 5 is heated and pressurized in the first stage to form the horizontal sealing portion 12, and the two stages are formed. By visually pressing the lateral seal portion 12 portion with the cooled seal bar, the lateral seal portion 12 can be fixed and stabilized.

The package W continuously made in the horizontal seal roll 10 is cut in the width direction by cutting the substantially intermediate portion of the horizontal seal portion 12 by the separating means 15 using a rotary cutter or the like, and is integrated into one piece or a plurality of required pieces. It is carried out in a state where it is separated or a plurality of bodies are connected by making a perforation in a substantially intermediate portion of the horizontal seal portion 12.

In the present invention, as described above, feed rolls (in-feed roll 8 and out-feed roll 9) are provided at the upstream position and the downstream position of the vertical seal roll 2, respectively, and the plastic film F (cylindrical body 5) is formed by the feed roll. It is characterized by the fact that it is continuously fed out. According to this, the meandering of the plastic film F is suppressed, and the side ends of the plastic film F folded back in the width direction by the guidance of the guide rod 1 can be overlapped with each other exactly, causing ear misalignment and vertical sealing. It is possible to effectively suppress the displacement of the vertical seal position due to the roll 2.

The in-feed roll 8 is provided so as to sandwich at least both end portions of the stacked plastic films F. For example, when the plastic film F is wide, the in-feed roll 8 is further provided in the center of the plastic film F. By providing a plurality of portions at the portion, the folded end portion, or the like, the meandering of the plastic film F can be effectively suppressed.

In the outfeed roll 9, by continuously pulling out the tubular body 5 formed by the vertical heat seal by the vertical seal roll 2, the tubular body 5 can be sent out to the horizontal seal roll 10 without meandering. It is possible to effectively suppress the occurrence of vertical wrinkles in the horizontal seal portion 12. The outfeed roll 9 is provided at a position downstream of the vertical seal roll 2 so as to sandwich at least both end portions of the tubular body 5, and for example, when the plastic film F has a wide width, the center of the tubular body 5 is provided. It may be provided in a plurality of places such as a section.

The in-feed roll 8 and the out-feed roll 9 are controlled so that the tension of the plastic film F (cylindrical body 5) running between them is constant . According to this, the plastic film F (cylindrical body 5) running between the in-feed roll 8 and the out-feed roll 9 does not have slack, and the thickness of the plastic film F is uneven (difference in thickness). The side edge portions 6 of the plastic film F can be overlapped exactly without being affected by the difference in length between the left and right sides, and the end face can be suppressed from shifting (ear misalignment) .

Further, according to the present invention, by providing the in-feed roll 8 and the out-feed roll 9, the vertical seal roll 2, which has conventionally functioned as a feed roll, only needs to perform heat sealing, and the vertical seal condition (temperature). , Pressure, etc.) are alleviated and become flexible, and various plastic films can be reliably heat-sealed without causing sealing defects.

Further, according to the present invention, by providing the in-feed roll 8, the plastic film F does not curl on the inlet side of the vertical seal roll 2, and the plastic film to the vertical seal roll 2 such as when the film roll R is replaced. The setting of F can be facilitated, and the loss of the plastic film F at the start of operation can be reduced. Further, even when restarting from the operation stop, since the plastic film F is sandwiched by the infeed roll 8, the vertical seal position on the vertical seal roll 2 can be quickly stabilized, and the plastic film F at the time of restart can be quickly stabilized. You can also expect the effect of reducing the loss of.

(Example)
With the filling and packaging machine of the present invention, a tubular body (the plastic film is folded in two at the center position in the width direction, and the overlapping side edges are vertically heat-sealed by a vertical heat seal roll using the following two types of plastic films. A tubular body was continuously heat-sealed to form a tubular body), and the deviation of the end face (ear deviation width) at the side end of the tubular body was measured. A comparative example is a tubular body manufactured by using a conventional filling / packaging machine that does not have an in-feed roll and an out-feed roll. The results are shown in Table 1.
<Film 1> Film composition: PET 16 μm / PP 50 μm Film width: 270 mm Film length: 100 m
<Film 2> Film composition: NY15 μm / PE60 μm Film width: 298 mm Film length: 100 m

From the results in Table 1, according to the filling and packaging machine of the example of the present invention, the ear deviation width is 1.0 mm or less, which is larger than that of the comparative example (film 1: maximum 1.5 mm, film 2: maximum 2.5 mm). It was confirmed that the width could be reduced and the meandering of the plastic film could be effectively suppressed.

In the vertical filling and packaging machine and the filling and packaging method of the present invention, a package made of food and drink, seasoning liquid, pharmaceuticals, chemicals and other liquids, viscous substances or powders / granules is filled. It can be suitably used in the case of manufacturing, and in particular, it can be suitably used in the case of simultaneously and continuously forming a package in a plurality of rows using a wide plastic film.

1 Guide rod 2 Vertical seal roll 3 Seal bar 4 Vertical seal part 5 Cylindrical body 6 Side end part 7 Folded part 8 Infeed roll 9 Outfeed roll 10 Horizontal seal roll 11 Filling nozzle 12 Horizontal seal part 13 Heat seal bar 15 Detachment Means R Film roll F Plastic film W Package M Packaged object

Claims (2)

It is a vertical filling and packaging machine that continuously manufactures a filling package made by filling a packaging bag made of plastic film with an object to be packaged.
At least the non-folded side ends of one continuously unfolded long plastic film used to be folded back in the width direction, or both side ends of two continuously unwound long plastic films, respectively. A pair of vertical seal rolls that continuously form one tubular body by sequentially vertically sealing while continuously feeding out in the longitudinal direction.
The tubular body is provided with a horizontal seal roll for continuously making a bag by applying horizontal seals to the tubular body at predetermined intervals in the longitudinal direction while filling the packaged object.
The position upstream of the longitudinal sealing rolls is less and also the both side edge portions of at least the non-folded end and folded portion, or overlapping two of the plastic film of one of the plastic film made by folding in the width direction At the position, one or more infeed roll pairs that sandwich the plastic film and continuously feed it in the longitudinal direction are arranged, and at a position downstream of the vertical seal roll, at least at both end portions of the tubular body. At the position, one or more outfeed roll pairs that continuously pull out the tubular body in the longitudinal direction are arranged .
The in-feed roll pair and the out-feed roll pair are controlled so that the tension applied to the plastic film on the upstream side and the tubular body on the downstream side of the vertical seal roll running between these roll pairs is constant. A vertical filling and packaging machine characterized by being to be used. It is a method of continuously manufacturing a filled package made by filling a plastic film packaging bag with an object to be packaged.
At least the non-folded side ends of one continuously unfolded long plastic film used by folding in the width direction, or both side ends of two continuously unwound long plastic films, respectively. , A tubular body forming step of forming a tubular body by sequentially vertically sealing while continuously feeding out in the longitudinal direction with a pair of vertical seal rolls.
A bag-making step of continuously making a package by applying a horizontal seal to the tubular body at predetermined intervals in the longitudinal direction while filling the object to be packaged with a horizontal seal roll. Have and
At least a non-folded end and folded portion of a sheet of the plastic film made by folding in the width direction, or overlapping two at least both side edge portions of the front Kipu Las plastic film respectively, distribution position upstream of the longitudinal sealing rolls It is sandwiched by the provided infeed roll pair, and the plastic film is continuously fed out in the longitudinal direction by the rotation of the infeed roll pair, and at the same time.
At least both end portions of the tubular body are sandwiched by one or more outfeed roll pairs provided downstream of the vertical seal roll, and the rotation of the outfeed roll pair causes the tubular body to be continuous in the longitudinal direction. Pull out to
The tension applied to the plastic film on the upstream side and the tubular body on the downstream side of the vertical seal roll running between the in-feed roll pair and the out-feed roll pair is constant. filling and packaging method of the packaged product and to control.

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