WO2017110127A1 - 成形面ファスナーの製造方法及び成形装置 - Google Patents
成形面ファスナーの製造方法及び成形装置 Download PDFInfo
- Publication number
- WO2017110127A1 WO2017110127A1 PCT/JP2016/072654 JP2016072654W WO2017110127A1 WO 2017110127 A1 WO2017110127 A1 WO 2017110127A1 JP 2016072654 W JP2016072654 W JP 2016072654W WO 2017110127 A1 WO2017110127 A1 WO 2017110127A1
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- WO
- WIPO (PCT)
- Prior art keywords
- molded
- mold member
- primary
- surface fastener
- claw
- Prior art date
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- 238000000465 moulding Methods 0.000 title claims abstract description 200
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 65
- 210000000078 claw Anatomy 0.000 claims abstract description 236
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- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 87
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- 238000001816 cooling Methods 0.000 description 2
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- 238000007599 discharging Methods 0.000 description 2
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- 238000003466 welding Methods 0.000 description 2
- 241001133760 Acoelorraphe Species 0.000 description 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 208000008035 Back Pain Diseases 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0069—Details
- A44B18/0076—Adaptations for being fixed to a moulded article during moulding
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0003—Fastener constructions
- A44B18/0007—Fastener constructions in which each part has similar elements
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0003—Fastener constructions
- A44B18/0015—Male or hook elements
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0003—Fastener constructions
- A44B18/0015—Male or hook elements
- A44B18/0019—Male or hook elements of a mushroom type
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0061—Male or hook elements
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0061—Male or hook elements
- A44B18/0065—Male or hook elements of a mushroom type
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
- A44B18/0069—Details
- A44B18/0073—Attaching means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/62—Mechanical fastening means ; Fabric strip fastener elements, e.g. hook and loop
- A61F13/622—Fabric strip fastener elements, e.g. hook and loop
- A61F13/625—Fabric strip fastener elements, e.g. hook and loop characterised by the hook
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
- B29C39/148—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length characterised by the shape of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/26—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length in several steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/727—Fastening elements
Definitions
- the present invention relates to a manufacturing method for manufacturing a molded surface fastener in which a plurality of male engaging elements are erected on the upper surface of a flat base member, and a molding apparatus used for manufacturing the molded surface fastener.
- a hook-and-loop fastener product in which a female hook-and-loop fastener having a plurality of loops and a male molded hook-and-loop fastener that can be attached to and detached from the female hook-and-loop fastener are used in combination.
- a male molded surface fastener manufactured by molding a synthetic resin is generally provided with a plurality of male engaging elements having a mushroom-like shape on the upper surface of a flat plate-like base material portion. Is formed.
- Such surface fastener products having male surface fasteners are currently widely used in a wide variety of products, such as disposable diapers, infant diaper covers, supporters for protecting joints of limbs, waist corsets ( It is often used for products that can be attached to and detached from the body such as back pain belts and gloves.
- Patent Document 1 many molded surface fasteners used for disposable diapers and the like have been developed so far, and are disclosed in, for example, JP 2013-529974 A (Patent Document 1).
- the surface fastener described in Patent Document 1 is formed by standing a plurality of male engaging elements on a flat base portion.
- Each engaging element has a frustum-shaped stem portion and an engaging head integrally formed on the stem portion, and the engaging head substantially extends in all directions from the stem portion. Overhanging with a volume equal to.
- Patent Document 1 for at least some of the engaging elements, a protruding portion extending only in one of the x direction and the y direction in the engaging head is directed downward toward the base material portion.
- a molded surface fastener having an engagement element as described above can have high peel strength when engaged with a surface fastener having a loop-shaped female engagement element.
- Patent Document 2 describes a molded surface fastener having enhanced engagement and separation properties.
- the engaging element provided in the molded surface fastener of Patent Document 2 includes a stem portion that is erected from the base portion and an engaging head that is integrally formed on the stem portion.
- a plurality of teeth are provided at the outer peripheral edge of the engaging head so as to be rotationally symmetric with respect to the center point.
- Patent Document 2 as a method of manufacturing a molded surface fastener, a method of extruding a molten synthetic resin material between a molding roller and a pressure roller is used. In this case, a plurality of molding cavities having shapes corresponding to the engaging elements of the molding surface fastener are formed on the outer peripheral surface of the molding roller.
- the base portion is molded by the gap between the molding roller and the pressure roller, and the synthetic resin material of the molding roller is formed by the pressure roller.
- the engaging element is molded integrally with the base member by being pushed into the molding cavity. Then, after the synthetic resin material is cured while being rotated together with the molding roller, the molded synthetic resin is removed from the molding cavity of the molding roller and peeled off from the molding roller, whereby the molded surface fastener of Patent Document 2 is manufactured.
- Patent Document 3 Japanese Patent Publication No. 2002-519078 corresponds discloses a method and apparatus for manufacturing a surface fastener having a plurality of male engaging elements. Yes.
- Patent Document 3 first, as shown in FIG. 42, a flat base material portion, a stem portion erected on the base material portion, and a primary integrally formed on the stem portion.
- a primary molding step of molding a primary molded body 80 having a head is performed. Thereafter, the primary molded body 80 is passed through the calendar and the primary head of the primary molded body 80 is pressed to extend the primary head flat in the radial direction and form a secondary molding step into the engaging head. .
- the molding apparatus 81 that performs the primary molding described above includes a rotating mold taking cylinder 82, a press cylinder 83 that is arranged to face the mold taking cylinder 82 with a predetermined gap, and a mold taking cylinder 82. And an extrusion head 84 for supplying a molten thermoplastic resin between the press cylinders 83.
- the molding cylinder 82 of Patent Document 3 includes a cylindrical outer screen 85 as shown in FIGS. 43 and 44, and a cylindrical inner screen 86 in contact with the inner peripheral surface of the outer screen 85.
- a plurality of cylindrical cavities 87 for forming the stem portion are formed in the outer screen 85 of the mold taking cylinder 82.
- the inner screen 86 is formed with a plurality of cylindrical cavities 88 for forming the primary head.
- the cavities 87 of the outer screen 85 and the cavities 88 of the inner screen 86 are arranged in alignment with each other.
- thermoplastic resin material is supplied from the extrusion head 84 to the molding cylinder 82 and the press cylinder 83 while rotating the molding cylinder 82 and the press cylinder 83 using the molding apparatus 81 having such a molding cylinder 82. .
- a primary molded body 80 is formed in which a plurality of engaging elements having a stem portion and a primary head and having depressions formed in the primary head are erected on the base material portion.
- the molded primary fastener of Patent Document 3 in which a plurality of mushroom-like engaging elements are erected on the base portion by passing the obtained primary molded body 80 through a calendar and thinning each primary head. Is manufactured. Moreover, the molded surface fastener manufactured by this patent document 3 has the characteristic that a recessed part is formed in the upper surface center part in the engagement head of each engagement element.
- the male surface and female surface fasteners can be easily attached and detached, and the male surface
- the engagement strength peeling strength
- the molded surface fastener may directly touch the skin, so that the surface-side feel on which the male engaging element of the molded surface fastener is arranged can be obtained in order to obtain a soft feel. It is also desired to improve. For this reason, the molded surface fastener described in Patent Documents 1 to 3 has room for further improvement in order to solve the above problems.
- a specific object of the present invention is to produce a molded surface fastener that has a large engagement strength (peeling strength) with respect to a female surface fastener and can stably obtain a good touch. It is providing the manufacturing method of a molded surface fastener, and the shaping
- a method for manufacturing a molded surface fastener includes a plurality of engaging elements erected on an upper surface of a flat plate-like base material portion, and each engaging element includes the base material.
- the manufacturing method of manufacturing a synthetic resin molded surface fastener having a stem portion rising from a portion and an engaging head formed integrally on the stem portion, the base portion and the base portion
- the manufacturing method including a secondary molding step of molding, a plurality of through holes drilled so as to penetrate from the outer peripheral surface to the inner peripheral surface in the primary molding step, and recessed in the inner peripheral surface Featuring multiple recesses and few through holes At least a part of the temporary elements is raised from the base material portion using a molding apparatus having a mold member communicating with one of the recesses and a
- the main feature is that it comprises molding from a part.
- the auxiliary recess that is arranged in close contact with the inner peripheral surface of the mold member inside the mold member and communicates with the through hole of the mold member is recessed in the outer peripheral surface.
- the temporary element is provided with a rib portion that bulges upward from the upper surface of the primary stem portion, and the rib portion faces the outside of the primary stem portion. It is preferable to include forming the additional projecting portion projecting from the projecting portion and molding the claw portion from the projecting portion and the additional projecting portion in the secondary molding step.
- Another method of manufacturing a molded surface fastener provided by the present invention is a manufacturing method of manufacturing a molded surface fastener made of synthetic resin in which a plurality of engaging elements are erected on the upper surface of a flat plate-like base material portion.
- a plurality of through holes formed so as to penetrate from the outer peripheral surface to the inner peripheral surface, and a plurality of recesses provided in the inner peripheral surface, each through hole communicating with at least one of the recesses.
- a stem portion where the engaging element stands from the base material portion, and an upper end of the stem portion using a molding apparatus having a mold member that rotates and a drive unit that rotates the mold member at a predetermined speed.
- forming the molded surface fastener having at least one claw portion projecting from the outer peripheral side surface of the portion.
- the claw portion of at least a part of the engaging element protrudes from the outer peripheral side surface of the stem portion in parallel with the upper surface of the base material portion or toward the base material portion. It is preferable to include deforming to do. Further, an auxiliary mold member that is arranged in close contact with the inner peripheral surface of the mold member inside the mold member and has an auxiliary concave portion that communicates with the through hole of the mold member is provided in the outer peripheral surface. Furthermore, using the forming apparatus, the engaging element is formed with a rib portion that bulges upward from the upper surface of the stem portion and an additional claw portion that protrudes from the rib portion toward the outside of the stem portion. It is preferable to include.
- the molding apparatus includes, as a basic configuration, a mold member, a drive unit that rotates the mold member at a predetermined speed, and a synthetic resin that is melted toward the mold member.
- the mold member In a molding apparatus used for manufacturing a synthetic resin molded surface fastener having an extrusion nozzle for discharging material, and a plurality of engaging elements standing on the upper surface of the base material portion, the mold member has an outer periphery A plurality of through-holes drilled so as to penetrate from the surface to the inner peripheral surface, and a plurality of concave portions recessed in the inner peripheral surface, and each through-hole of the mold member has at least one of the above-mentioned
- the most important feature is that it communicates with the recess.
- the mold member has a cylindrical shape, and a die wheel is formed using the mold member and the drive unit. Further, in the molding apparatus of the present invention, an auxiliary recess that is arranged in close contact with the inner peripheral surface of the mold member inside the mold member and communicates with the through hole of the mold member is provided in the outer peripheral surface. It is preferable that the auxiliary mold member is rotated in synchronization with the mold member.
- the concave portion is a linear concave groove portion or a concave groove portion curved in a waveform.
- the groove width of each concave groove part is set to 0.005 mm or more and 0.1 mm or less, and the groove depth of each concave groove part is set to 0.005 mm or more and 0.05 mm or less.
- a primary unit having a base part and a plurality of temporary elements standing on the base part using a molding device Mold the molded body.
- the molding apparatus used at this time includes a mold member and a drive unit that rotates the mold member at a predetermined speed.
- the mold member has a plurality of through-holes drilled so as to penetrate from the outer peripheral surface to the inner peripheral surface, and is recessed in the inner peripheral surface so that molten synthetic resin (molten resin) can flow.
- molten resin molten resin
- the mold member allows each through hole to communicate with at least one recess, and allows molten resin filled in the through hole from the outer peripheral surface side to flow into the recess provided on the inner peripheral surface from the through hole. Is formed.
- At least a part of the temporary elements protrudes from the outer peripheral side surface of the primary stem portion standing from the base portion and the upper end portion of the primary stem portion.
- a primary molded body having a protrusion is continuously formed.
- a secondary molding step is performed in which the temporary element of the primary molded body is heated and the temporary element is crushed from above.
- the temporary element is formed simultaneously with the molding of the stem portion rising from the base material portion and the engaging head formed integrally on the stem portion from the primary stem portion and the protruding portion of the temporary element. At least one claw portion protruding from the outer peripheral edge portion of the engaging head is formed from the protruding portion.
- the claw portion protruding from the outer peripheral edge of the engaging head has a claw width dimension smaller than the width dimension at the boundary between the stem portion and the engaging head.
- the claw width dimension is perpendicular to the protruding direction of the claw portion or the protruding direction of the engaging head, and in the direction perpendicular to the vertical direction of the molded surface fastener (standing direction of the stem portion). Says the dimensions of the nail.
- the width dimension at the boundary portion means that the stem portion and the engaging head in any one of the directions (or planes) orthogonal to the vertical direction (standing direction of the stem portion) of the molded surface fastener.
- the dimension of the imaginary straight line that passes through the center of the boundary surface in particular, in the present invention, the dimension in the machine direction (MD: the direction in which the molded surface fastener flows) in the molding process of the molded surface fastener among the directions orthogonal to the standing direction of the stem portion.
- MD machine direction
- the width dimension of the boundary portion is the same as the diameter of the circular cross section as the boundary surface.
- the molded surface fastener manufactured according to the present invention has the minute claw projecting from the outer peripheral edge of the engaging head as described above.
- the claw portion can be formed to be inclined or curved downward from the engagement head portion toward the base material portion. For this reason, the engagement strength with respect to the loop increases.
- the loop of the female surface fastener engagement element
- the loop of the female surface fastener is engaged. It becomes easy to catch on the claw part of the element.
- the loop of the female surface fastener can be made difficult to be detached from the engaging element of the present invention (it is difficult to be detached), thereby increasing the engaging strength.
- the engagement strength (peeling strength) with respect to the female surface fastener can be effectively increased. Therefore, when the manufactured molded surface fastener is used for a product such as a disposable diaper, even if various operations are performed in a state where the molded surface fastener and the female surface fastener are combined, the combined state is stabilized. Can be maintained.
- the molded surface fastener manufactured according to the present invention since the claw portion provided on the outer peripheral edge portion of the engaging head is minute, when the molded surface fastener is touched from the upper surface side serving as the engaging surface, By reducing the influence of the part on the feel of the molded surface fastener, it becomes easier to obtain a smooth feel and a soft and supple feel. That is, according to the manufacturing method of the present invention, it is possible to stably provide a male molded surface fastener having a high engagement strength and a good surface feel.
- the mold member as described above is disposed in close contact with the inner peripheral surface of the mold member inside the mold member.
- a molding apparatus having an auxiliary mold member in which an auxiliary concave portion communicating with the through hole of the mold member is formed on the outer peripheral surface, and a drive unit that rotates the mold member and the auxiliary mold member at a predetermined speed.
- a primary molded body having a protruding portion can be continuously molded.
- the stem portion and the engaging head are simultaneously molded, and at the same time, A claw portion can be formed on the outer peripheral edge portion of the engaging head from the protruding portion and the additional protruding portion. Thereby, a some nail
- claw part can be stably provided in an engagement head. For this reason, the molded surface fastener which has higher engagement strength can be provided stably.
- the molding device used in the primary molding process has a mold member that forms a protrusion on the temporary element and an auxiliary mold member that forms an additional protrusion on the temporary element, so that different protrusions are formed on the engagement element.
- the claw portion and the additional claw portion can be provided as the portion, and further, for example, the protrusion portion and the additional protrusion portion of the temporary element can be formed in different sizes.
- the molded surface fastener which has the engaging element by which the nail
- a molded surface fastener having a base material portion and a plurality of engaging elements standing on the base material portion is molded using a molding device.
- the molding apparatus used at this time includes a mold member and a drive unit that rotates the mold member at a predetermined speed.
- the mold member has a plurality of through-holes drilled so as to penetrate from the outer peripheral surface to the inner peripheral surface, and is recessed in the inner peripheral surface so that molten synthetic resin (molten resin) can flow.
- a plurality of recesses the mold member allows each through hole to communicate with at least one recess, and allows molten resin filled in the through hole from the outer peripheral surface side to flow into the recess provided on the inner peripheral surface from the through hole. Is formed.
- At least a part of the engaging elements rises from the base material portion, and at least one claw portion projects from the outer peripheral side surface of the upper end portion of the stem portion. Can be produced efficiently and stably.
- the claw portion protruding from the outer peripheral side surface of the stem portion passes through the center on the upper surface of the stem portion and connects the two segments on the upper outer periphery of the stem portion. It can have a claw width dimension that is smaller than the length.
- the line segment to which the claw width dimension of the claw portion is compared is an imaginary straight line of a portion connecting two points on the upper outer periphery of the stem portion through the center of the upper surface of the stem portion in a plan view of the engagement element. That is, the virtual straight line is orthogonal to the vertical direction of the molded surface fastener (the standing direction of the stem portion).
- the virtual straight line segment is a line segment along a machine direction (MD: a direction in which the molded surface fastener flows) in a molding surface fastener molding process among directions perpendicular to the standing direction of the stem portion.
- MD machine direction
- the diameter of the circular upper surface of the stem portion corresponds to the imaginary straight line segment.
- the molded surface fastener manufactured according to the present invention has the minute claw portion protruding from the outer peripheral side surface at the upper end portion of the stem portion.
- the engaging element formed of such a stem portion and a minute claw portion has a new form different from the conventionally known J-shape, palm tree shape, and mushroom shape. .
- the stem portion can easily secure a large strength, it is possible to effectively increase the shear strength of the produced molded surface fastener with respect to the female surface fastener.
- the engagement element of the molded surface fastener to be manufactured can be smoothly inserted between the loops of the female surface fastener. Further, the engaging element can be pushed deeply into the vicinity of the root of the loop with respect to the female surface fastener. Thereby, the loop can be firmly hooked on the claw portion of the engaging element and can be stably engaged.
- the flat upper surface of the stem portion is widely exposed upward, and only the minute claw portion projects outward from the stem portion without providing the engaging head. Formed as follows. For this reason, when the molded surface fastener is touched from the upper surface side serving as the engagement surface, a smooth touch feeling and a soft and supple touch feeling are easily obtained. That is, according to the manufacturing method of the present invention, the stem portion of the engaging element is difficult to bend, the loop can be firmly hooked and engaged with the claw portion, and the surface has a good skin feel. A molded surface fastener can be provided stably.
- a molded surface fastener having an engagement element is formed by a mold member of a molding apparatus, and then the molded surface fastener is sandwiched between a pair of upper and lower pickup rollers. By pulling, the molded surface fastener can be peeled from the mold member. At this time, by pressing the engaging element from above with a pair of rotating pickup rollers (especially the upper clamping roller), the claw part formed on at least a part of the engaging element is separated from the outer peripheral side surface of the stem part. It can be deformed so as to protrude in parallel with the upper surface of the part or inclined downward or curved toward the base part.
- the molded surface fastener is peeled off from the mold member by the pickup roller, the molded surface fastener is conveyed while being heated, or hot air is blown from above the engagement element. Can be further deformed to be inclined or curved downward.
- the claw part molded by the molding apparatus is formed by forcibly pulling it out from the mold member of the molding apparatus.
- the claw portion of the engaging element can be positively deformed by pressing from above with a pickup roller as described above, whereby the claw portion can be moved from the outer peripheral side surface of the stem portion to the base material. It can be made to project by being inclined or curved downward in parallel with the upper surface of the part or toward the base part.
- the loop By forming the claw portion in such a protruding direction, the loop can be stably engaged with the claw portion of the engaging element when the loop of the female surface fastener is engaged with the molded surface fastener. .
- the engagement strength (peeling strength) of the molded surface fastener with respect to the female surface fastener can be further increased.
- the mold member as described above is brought into close contact with the inner peripheral surface of the mold member inside the mold member.
- an auxiliary mold member in which an auxiliary concave portion communicating with the through hole of the mold member is provided in the outer peripheral surface, and a drive unit that rotates the mold member and the auxiliary mold member at a predetermined speed.
- a molding apparatus can be used. Accordingly, at least a part of the engaging elements includes the above-described stem portion and claw portion, a rib portion that bulges upward from the upper surface of the stem portion, and an additional claw portion that protrudes from the rib portion toward the outside of the stem portion. It is possible to continuously form a molded surface fastener having the following.
- the engaging element can be provided with a claw portion and an additional claw portion as different protruding portions. For this reason, the molded surface fastener which has higher engagement strength can be provided stably. Further, by using a molding apparatus having a mold member and an auxiliary mold member, for example, the claw portion and the additional claw portion can be easily formed in different sizes in the engaging element.
- a cylindrical member (die wheel) can be used as the mold member of the molding apparatus in the manufacturing method according to the first and second embodiments described above.
- molding apparatus can be formed with a simple structure.
- the primary molded object in a 1st form or the molded surface fastener in a 2nd form can be stably shape
- the molding apparatus of the present invention used for manufacturing a molded surface fastener includes a mold member, a drive unit that rotates the mold member at a predetermined speed, and a synthetic resin material that is melted toward the mold member. And an extrusion nozzle for discharging the liquid.
- the mold member includes a plurality of through holes formed so as to penetrate from the outer peripheral surface to the inner peripheral surface, and a plurality of concave portions provided in the inner peripheral surface. Further, each through hole of the mold member communicates with at least one recess.
- Such a molding apparatus of the present invention can be formed with a simple structure.
- molding surface fastener in a 2nd form can be shape
- the minute protrusion provided on the primary molded body in the first form and the minute claw provided on the molded surface fastener in the second form can be stably formed.
- the mold member has a cylindrical shape, and a die wheel is formed by using the mold member and the drive unit.
- the primary molded body in the first form or the molded surface fastener in the second form can be stably molded.
- the auxiliary recess that is arranged in close contact with the inner peripheral surface of the mold member inside the mold member and communicates with the through hole of the mold member is provided in the outer peripheral surface. It has an auxiliary mold member.
- the auxiliary mold member rotates in synchronization with the mold member.
- a linear groove portion or a groove portion that curves in a waveform is formed as the concave portion on the inner peripheral surface of the mold member.
- the groove width of each groove is set to 0.005 mm or more and 0.1 mm or less
- the groove depth of each groove is set to 0.005 mm or more and 0.05 mm or less.
- FIG. 5 is a sectional view taken along line VV shown in FIG. 3. It is an expansion perspective view which expands and shows the nail
- FIG. 10 is a schematic diagram of a main part illustrating a positional relationship between a through hole and a groove portion of a cylindrical body according to a second embodiment.
- 6 is a perspective view showing a temporary element of a primary molded body molded in Example 2.
- FIG. It is a top view which shows only a temporary element.
- FIG. 3 It is a perspective view which shows the engaging element of the molded surface fastener manufactured in Example 3 of this invention. It is a top view which shows only an engagement element.
- FIG. 10 is a schematic diagram of a main part illustrating a positional relationship between a through hole and a groove portion of a cylindrical body according to a second embodiment.
- 6 is a perspective view showing a temporary element of a primary molded body molded in Example 2.
- FIG. It is a top view which shows only a temporary element.
- FIG. 3 It is a top view which shows only an engagement element.
- FIG. 10 is a schematic diagram of a main part illustrating a positional relationship between a through hole and a groove portion of a cylindrical body according to a third embodiment.
- 6 is a perspective view showing a temporary element of a next molded body molded in Example 3.
- FIG. It is a top view which shows only a temporary element.
- It is a principal part schematic diagram which shows the positional relationship of the through-hole of a cylindrical body which concerns on the modification 1, and a ditch
- FIG. 10 is a schematic diagram illustrating a main part of a positional relationship between a through hole and a concave portion of a cylindrical body according to Modification Example 5.
- FIG. 10 is a schematic diagram illustrating a main part of a positional relationship between a through hole and a concave portion of a cylindrical body according to Modification 6; FIG.
- FIG. 10 is a schematic diagram illustrating a main part of a positional relationship between a through hole and a concave portion of a cylindrical body according to Modification Example 7. It is a principal part schematic diagram which shows the positional relationship of the through-hole of a cylindrical body which concerns on the modification 8, and a recessed part. It is a perspective view which shows the engaging element of the molded surface fastener manufactured in Example 4 of this invention. It is a top view which shows only an engagement element. It is a schematic diagram which shows typically the manufacturing apparatus of the molded surface fastener which concerns on Example 4. FIG. It is a perspective view which shows typically the cylindrical body and auxiliary
- the present invention is not limited to the embodiments described below, and various modifications can be made as long as it has substantially the same configuration as the present invention and has the same effects. Is possible.
- the number of engagement elements arranged on the base portion of the molded surface fastener, the arrangement position, the formation density, and the like are not particularly limited and can be arbitrarily changed. It is.
- FIG. 1 is a perspective view showing a molded surface fastener manufactured in Example 1.
- FIG. 2, 3, and 4 are a perspective view, a plan view, and a front view showing an engaging element of a molded surface fastener.
- FIG. 4 is a front view of only the engagement element as seen from the front-rear direction (machine direction: MD) of the molded surface fastener.
- FIG. 5 is a cross-sectional view of the engaging element.
- FIG. 6 is an enlarged view of a main part showing an enlarged claw part provided in the engaging element.
- the front-rear direction of the molded surface fastener and the primary molded body is the length direction of the molded surface fastener and the primary molded body that are molded in a long shape as will be described later.
- the front-back direction is a direction along the machine direction (M direction or MD) through which the molded surface fastener or the primary molded body flows in the manufacturing process of the molded surface fastener.
- the left-right direction is a width direction orthogonal to the length direction and along the upper surface (or lower surface) of the base portion of the molded surface fastener.
- the left-right direction and the width direction are orthogonal directions (C direction or CD) orthogonal to the machine direction (MD).
- the vertical direction (thickness direction) is a height direction orthogonal to the length direction and orthogonal to the upper surface (or lower surface) of the base portion of the molded surface fastener.
- the molded surface fastener 1 of Example 1 shown in FIG. 1 is manufactured by molding a thermoplastic resin using a manufacturing apparatus 30 having a molding apparatus 40 and a heating and pressing apparatus 60 as described later.
- the molded surface fastener 1 is formed in a rectangular sheet shape that is long in the machine direction of the manufacturing apparatus 30 in plan view.
- the length dimension and width dimension of the molded surface fastener 1 of this invention are not specifically limited, By cutting the molded surface fastener 1, it can change arbitrarily.
- the molded surface fastener 1 may have a shape other than a rectangle in plan view.
- the type of synthetic resin for forming the molded surface fastener 1 is not particularly limited, but the material of the molded surface fastener 1 is, for example, a thermoplastic resin such as polypropylene, polyester, nylon, polybutylene terephthalate, or a copolymer thereof. Can be suitably employed.
- the molded surface fastener 1 is made of polypropylene.
- the molded surface fastener 1 of the first embodiment includes a thin plate-like base material portion 10 and a plurality of engagement elements 20 provided so as to stand on the upper surface of the base material portion 10.
- the base material portion 10 is formed with a predetermined thickness, and the upper surface and the lower surface of the base material portion 10 are flat and formed in parallel to each other.
- the plurality of engagement elements 20 are arranged in alignment along the machine direction (MD) and the orthogonal direction (CD).
- the arrangement of the engagement elements 20 is not limited as described above.
- the plurality of engaging elements 20 may be arranged on the base material portion 10 in another arrangement pattern such as a staggered pattern, or may be randomly provided on the base material portion 10.
- Each engagement element 20 includes a stem portion 21 rising from the base material portion 10 and a disk-shaped or dish-shaped engagement head formed by projecting outward from the entire circumference of the upper end of the stem portion 21. Part 22 and two minute claw parts 23 projecting from the outer peripheral edge of engaging head 22.
- the stem portion 21 of the engaging element 20 stands upright from the base material portion 10 and has a truncated cone shape in which a cross-sectional area perpendicular to the vertical direction gradually increases as the base material portion 10 is approached.
- the lower end portion of the stem portion 21 of the first embodiment is formed so as to be curved so that the outer peripheral surface expands downward.
- the form of the stem portion 21 is not limited to the truncated cone shape, and may be a truncated pyramid shape such as a truncated pyramid shape, a columnar shape, or a prismatic shape such as a quadrangular prism. good.
- the engagement head 22 of the engagement element 20 has a disk-like shape that expands in a direction perpendicular to the vertical direction.
- the engagement head 22 is integrally formed on the stem portion 21 via a boundary portion 24.
- the engagement head 22 of the first embodiment has a form that exhibits a circular shape in a plan view when the engagement element 20 is viewed from above.
- the circular shape of the engaging head 22 in plan view is similar to the circular shape of the cross section perpendicular to the vertical direction at the boundary 24 of the engaging element 20.
- the similarity mentioned here is not only a congruent case in which both shapes are completely coincided with each other when the scale of one shape is enlarged or reduced so as to match the scale of the other shape. This includes the case of overlapping with an area of 85% or more, preferably 90% or more.
- the engagement head 22 is larger than 1.0 times and less than 3.0 times the diameter D of the circular cross section at the boundary portion 24 of the engagement element 20 in a plan view of the engagement element 20.
- the diameter is preferably 1.3 times or more and 2.0 times or less.
- the engagement head 22 has one side corresponding to one side of the polygonal cross section at the boundary 24 of the engagement element 20.
- the length is greater than 1.0 times and less than or equal to 3.0 times, preferably greater than or equal to 1.3 times and less than or equal to 2.0 times.
- the engaging head 22 of the first embodiment includes a flat head top end surface 22 a that is arranged in parallel with the upper surface of the base material portion 10. Further, on the opposite side of the head top end surface 22a, a donut-shaped head rear surface 22b that extends flatly outward from the boundary portion 24 with the stem portion 21 is disposed so as to face the base material portion 10. . Furthermore, a curved outer peripheral side surface 22c is formed from the outer periphery of the head top end surface 22a to the head rear surface 22b.
- the shape of the engagement head 22 may have a shape other than a circle corresponding to the cross-sectional shape of the stem portion 21 in plan view. Further, the engaging head 22 does not necessarily have to protrude from the entire periphery of the upper end of the stem portion 21. Further, in the plan view of the molded surface fastener 1, the center position of the engagement head 22 in one engagement element 20 and the center position in the cross section of the upper end of the stem portion 21 (cross section of the boundary portion 24) are shifted from each other. May be.
- Each engaging element 20 of the first embodiment has two claw portions 23 that protrude outward from the outer peripheral side surface 22c of the engaging head 22.
- the two claw portions 23 provided on the engagement element 20 are formed from the outer peripheral side surface 22c of the engagement head 22 along the radial direction of the engagement head 22 having a circular shape in plan view. It protrudes outward so as to extend radially from the center.
- the two claws 23 are arranged in the left-right direction (C Direction) and project in opposite directions.
- claw part 23 of the present Example 1 has a form which hangs down toward the front-end
- the claw portion 23 includes a claw upper surface inclined downward toward the tip, a claw back surface (lower surface) disposed to face the base material portion 10, and a pair of side wall surfaces disposed on both sides of the claw upper surface and the claw back surface. And have.
- claw part 23 is not specifically limited, What is necessary is just to protrude from the outer peripheral side surface 22c of the engaging head 22.
- the claw width dimension F (see FIG. 6) between the pair of side wall surfaces of the claw portion 23 is the boundary portion of the engagement element 20 at the base end portion that is coupled to the engagement head portion 22 of the claw portion 23.
- 24 is set to 1/3 or less, preferably 1/5 or less, more preferably 1/7 or less of the dimension in the M direction (width dimension of the boundary portion 24).
- the dimension in the M direction at the boundary portion 24 is the boundary. This is equivalent to the diameter of the portion 24.
- the cross-sectional shape at the boundary of the engaging element is a polygon such as a quadrangle
- the claw width dimension F between the pair of side wall surfaces of the claw is 1 in the dimension in the M direction at the boundary of the engaging element. / 3 or less, preferably 1/5 or less, more preferably 1/7 or less.
- the claw width dimension between the pair of side wall surfaces gradually decreases from the base end part of the claw part 23 toward the claw tip, and the claw height dimension between the claw upper surface and the claw back surface is reduced.
- the claw portion 23 gradually decreases from the base end portion toward the claw tip end.
- the tip of the claw portion 23 is formed so as to be positioned below the upper surface of the engaging head 22, and the claw upper surface of the claw portion 23 is formed in a curved surface that is inclined downward toward the tip.
- the claw back surface of the claw part 23 is formed in a curved surface that curves in a concave shape. Since the nail
- the specific size of the engagement element 20 is set as follows.
- the height dimension A in the vertical direction from the upper surface of the base member 10 in the engagement element 20 is set to 0.05 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm.
- the diameter B of the engagement head 22 in plan view of the engagement head 22 is set to 0.2 mm or more and 0.6 mm or less.
- the dimension in the M direction of the engagement head 22 in plan view of the engagement head 22 is 0.2 mm or more and 0.6 mm or less. Is set.
- the height C of the engagement head 22 in the engagement element 20 (that is, the height dimension from the boundary 24 of the engagement element 20 to the upper end of the engagement head 22) is 0.01 mm or more and 0.00. It is set to 1 mm or less.
- the diameter D at the boundary 24 of the engagement element 20 is set to 0.1 mm or more and 0.5 mm or less.
- the dimension of the boundary portion 24 in the M direction is set to 0.1 mm or more and 0.5 mm or less.
- the overhang dimension (projection length) E in the direction parallel to the upper surface of the base material portion 10 from the position of the boundary portion 24 of the engagement head 20 in the engagement head 22 to the outermost edge position of the engagement head 22 is 0. It is set to 0.01 mm or more and 0.2 mm or less, preferably 0.02 mm or more and 0.1 mm or less.
- the overhang angle ⁇ formed by the outer peripheral side surface of the stem portion 21 and the back surface 22b of the engagement head 22 in the engagement element 20 is set to 90 ° or more and 140 ° or less.
- the claw width dimension F between the pair of side wall surfaces at the base end portion of the claw portion 23 is set to 0.01 mm or more and 0.10 mm or less, preferably 0.03 mm or more and 0.08 mm or less.
- the claw length dimension from the boundary position between the head back surface 22b of the engaging head 22 and the claw back surface of the claw portion 23 to the tip position of the claw portion 23 is set to 0.01 mm or more and 0.04 mm or less. .
- the molded surface fastener 1 of the first embodiment having the above-described configuration is manufactured using the manufacturing apparatus 30 shown in FIG.
- the manufacturing apparatus 30 includes a molding apparatus 40 that performs a primary molding process and a heating and pressing apparatus 60 that heats and presses the primary molded body 11 that is molded by the primary molding process.
- the molding apparatus 40 includes a die wheel 41 that is driven and rotated in one direction (counterclockwise direction in the drawing), and a peripheral surface of the die wheel 41, and a molten synthetic resin material is continuously provided. And a pick-up roller 46 disposed downstream of the extrusion nozzle 45 in the rotation direction of the die wheel 41.
- the die wheel 41 includes a cylindrical body 42 that serves as a mold member, and a rotation driving roller 44 that is disposed as a driving unit that rotates the cylindrical body 42 in one direction.
- a cylindrical body 42 may also be called a sleeve or a cylindrical mold.
- a cooling jacket (not shown) for circulating the coolant is provided inside the rotation drive roller 44, and the primary molded body 11 formed on the peripheral surface of the die wheel 41 can be efficiently cooled.
- the cylindrical body 42 of the die wheel 41 includes a plurality of through holes 47 penetrating from the outer peripheral surface to the inner peripheral surface along the radial direction of the cylindrical body 42, and the inside of the cylindrical body 42.
- a plurality of concave groove portions 51 serving as concave portions that are linearly concaved in parallel with the central axis direction of the cylindrical body 42 are provided on the peripheral surface.
- the plurality of through holes 47 are provided as cavities for molding a primary stem portion 71 (to be described later) of the primary molded body 11, and the plurality of recessed groove portions (recessed portions) 51 are provided in the later-described primary molded body 11.
- the protrusion 73 is provided as a cavity for molding.
- the cylindrical body 42 After forming the cylindrical primary cylindrical body 42, a plurality of through holes 47 and a plurality of concave groove portions 51 are formed at predetermined positions in the primary cylindrical body 42. It is produced by.
- the primary cylindrical body 42 is made of a conventionally known metal such as nickel or stainless steel.
- a seamless primary cylindrical body 42 without a seam is produced by forming a metal plate having a predetermined thickness and length by rolling or the like, and rounding and welding the metal plate to a cylinder.
- the cylindrical body 42 of the first embodiment is formed by, for example, forming a plurality of through holes 47 and a plurality of concave groove portions 51 at predetermined positions of a flat metal plate material, and then rounding and welding the metal plate material to a cylinder. May be produced.
- the manufacturing method of the cylindrical body 42, the size and thickness of the cylindrical body 42, and the shape and arrangement of the through holes 47 and the recessed groove portions 51 provided in the cylindrical body 42 are not particularly limited.
- the plurality of through holes 47 are formed corresponding to the arrangement of the engaging elements 20 of the molded surface fastener 1 to be manufactured.
- the through holes 47 according to the first embodiment are formed at equal intervals at a predetermined pitch in the circumferential direction that is the M direction (MD) of the cylindrical body 42 and are parallel to the central axis of the cylindrical body 42.
- (CD) is formed at equal intervals at a predetermined pitch.
- the plurality of concave groove portions 51 are linearly recessed on the inner peripheral surface of the cylindrical body 42 along the C direction (CD) parallel to the central axis of the cylindrical body 42.
- the recessed groove 51 has a size that allows the inflow in a state where the synthetic resin forming the molded surface fastener 1 is melted.
- the concave groove portion 51 is formed through the cylindrical body 42.
- the hole 47 intersects with the circular outer peripheral edge and communicates with the through hole 47.
- FIG. 9 is a schematic view of a part of the cylindrical body 42 as viewed from the outer peripheral surface side.
- the concave groove portion 51 formed on the inner peripheral surface of the cylindrical body 42 is indicated by a broken line, and the groove bottom surface of the concave groove portion 51 is shown. Is represented by a gray color (the same applies to FIGS. 15, 18, and 23).
- the relative position of the groove 51 with respect to the through hole 47 can be accurately adjusted. For this reason, as will be described later, when the primary molded body 11 is formed, the temporary element 70 having a predetermined shape can be stably formed. As a result, a plurality of elements having the predetermined shape as shown in FIG.
- the molded surface fastener 1 having the engaging element 20 can be stably manufactured.
- the formation pitch in the circumferential direction of the through holes 47 provided in the cylindrical body 42 and the formation pitch in the circumferential direction of the recessed groove portions 51 provided in the inner peripheral surface are penetrated as described above.
- the positions of the hole 47 and the groove 51 are set so as to correspond to each other.
- the formation pitch of the through holes 47 and the formation pitch of the recessed groove portions 51 may be set so as not to correspond to each other.
- the plurality of concave groove portions 51 by providing the plurality of concave groove portions 51 at a formation pitch smaller than the formation pitch of the through holes 47, it is possible to stably form two or more claw portions on the engagement head of each engagement element. It becomes possible.
- the plurality of concave groove portions 51 by providing the plurality of concave groove portions 51 at a formation pitch larger than the formation pitch of the through holes 47, an engagement element having a claw portion protruding from the engagement head portion and a claw portion at the engagement head portion are provided. It is possible to manufacture a molded surface fastener having both engaging elements that are not provided.
- Each concave groove portion 51 provided in the first embodiment includes a flat groove bottom surface and a pair of groove side wall surfaces arranged in parallel to face each other so that a cross section in a direction orthogonal to the central axis is a quadrangle.
- the groove width of each groove 51 is set to 0.005 mm or more and 0.10 mm or less, preferably 0.01 mm or more and 0.08 mm or less.
- the groove depth of each concave groove 51 is set to 0.005 mm or more and 0.05 mm or less, preferably 0.005 mm or more and 0.03 mm or less, and more preferably 0.01 mm or more and 0.025 mm or less.
- the molten synthetic resin is passed through each of the cylindrical bodies 42 when the primary molded body 11 is molded. It is possible to smoothly flow into the concave groove 51 from the hole 47. Furthermore, the claw part 23 of the solidified primary molded body 11 can be stably punched out from the groove 51.
- the groove width of the recessed groove portion 51 is 1/3 or less of the dimension in the M direction of the through hole 47 provided in the cylindrical body 42 (in the case of the first embodiment, the diameter dimension of the through hole 47), preferably The size is set to 1/5 or less, more preferably 1/7 or less.
- the concave groove 51 formed on the inner peripheral surface of the cylindrical body 42 may be formed to have a substantially U-shaped cross section.
- the pickup roller 46 includes a pair of upper and lower clamping rollers 46a and 46b that sandwich the primary molded body 11 formed on the outer peripheral surface of the die wheel 41 from above and below.
- a surface layer (not shown) made of an elastomer such as polyurethane elastomer is provided on the outer peripheral surface portion in contact with the primary molded body 11 of the upper nip roller 46a and the outer peripheral surface portion in contact with the primary molded body 11 of the lower nip roller 46b. It has been.
- the upper clamping roller 46a and the lower clamping roller 46b are arranged to face each other with a predetermined interval.
- the upper sandwiching roller 46a and the lower sandwiching roller 46b rotate in a predetermined direction at a predetermined speed, respectively, so that the primary molded body 11 is continuously peeled off from the die wheel 41 toward the heating and pressing device 60. Can be transported smoothly.
- the pickup roller 46 immediately after the primary molded body 11 is peeled off from the die wheel 41, the same molded body 11 is sandwiched between the upper sandwiching roller 46a and the lower sandwiching roller 46b, as will be described later.
- the projecting portion (temporary claw portion) 73 of the temporary element 70 formed at 41 is deformed so as to project in parallel with the upper surface of the base material portion 10 or downwardly inclined or curved toward the base material portion 10. Can do.
- the heating and pressing device 60 includes a pair of upper and lower pressing rollers (calendar rollers) 61 and 62 disposed on the downstream side of the pickup roller 46, and includes an upper pressing roller 61 and a lower pressing roller 62. Are arranged facing each other with a predetermined interval.
- the interval between the upper pressure roller 61 and the lower pressure roller 62 can be adjusted by a height adjusting means (not shown), and the engagement element is formed from the lower surface (back surface) of the base portion 10 of the molded surface fastener 1 to be manufactured. 20 is adjusted in accordance with the height dimension of the engaging head 22 to the head top end face 22a.
- the interval between the upper pressing roller 61 and the lower pressing roller 62 is adjusted to be slightly smaller than the interval between the upper clamping roller 46 a and the lower clamping roller 46 b of the pickup roller 46.
- the upper pressing roller 61 includes a heating source (not shown) inside, and the surface of the upper pressing roller 61 can be heated and held at a predetermined temperature.
- the surface temperature of the upper pressure roller 61 to be heated and held is not particularly limited, but is set to a temperature at which the synthetic resin forming the molded surface fastener 1 can be softened, for example.
- the temperature is set to be a predetermined temperature that is not lower than the melting point ⁇ 40 ° C. of the synthetic resin forming the primary molded body 11 and not higher than the melting point ⁇ 10 ° C.
- the upper pressing roller 61 is arranged to rotate counterclockwise in FIG.
- the outer peripheral surface of the upper pressing roller 61 is a portion that presses the heated temporary element 70 of the primary molded body 11 molded in the primary molding process from above.
- the lower pressure roller 62 is disposed so as to rotate clockwise in FIG. 7 and serves as a support surface for supporting the conveyed primary molded body 11 from below.
- an upper belt mechanism and / or a lower belt mechanism (not shown) can be used instead of the upper pressure roller 61 and / or the lower pressure roller 62.
- each of the upper and lower belt mechanisms includes an endless belt, and a pair of left and right rotating rollers around which the endless belt is wound and which rotates the endless belt in one direction.
- a primary molding process for molding the primary molded body 11 using the molding apparatus 40 is performed.
- the molten synthetic resin material is continuously extruded from the extrusion nozzle 45 toward the peripheral surface of the die wheel 41.
- the base portion of the molded surface fastener 1 is formed between the extrusion nozzle 45 and the die wheel 41 by pushing the synthetic resin material onto the peripheral surface thereof. 10 is continuously formed.
- the interval between the extrusion nozzle 45 and the die wheel 41 is adjusted to a size corresponding to the thickness dimension of the base material portion 10 of the molded surface fastener 1 to be manufactured.
- the primary molded body 11 (also referred to as a preformed body) molded by the molding apparatus 40 according to the first embodiment includes a thin plate-like base material portion 10 and a plurality of erected on the upper surface of the base material portion 10. And provisional element 70.
- the base material portion 10 of the primary molded body 11 becomes the base material portion 10 of the molded surface fastener 1 as it is.
- the temporary element 70 formed in the primary molded body 11 is a portion that becomes the engaging element 20 of the molded surface fastener 1 by being press-molded in the secondary molding step.
- each temporary element 70 protrudes in the shape of a tongue so as to project outward from the outer peripheral side surface of the upper end portion of the truncated cone-shaped primary stem portion 71 rising from the base material portion 10 and the primary stem portion 71.
- Two protrusions (temporary claw portions) 73 are provided.
- the primary stem portion 71 is formed by filling a through hole 47 formed in the cylindrical body 42 with a synthetic resin, and has a conical shape in which a cross-sectional area perpendicular to the vertical direction gradually increases as the base portion 10 is approached. It has a trapezoidal form. Moreover, the upper end surface of the primary stem part 71 is formed in the flat surface. The upper end surface of the primary stem portion 71 and the upper surfaces of the two left and right projecting portions form a single plane.
- the temporary element 70 is pressed from above in the secondary molding step, and the upper end portion of the primary stem portion 71 is deformed, whereby the stem portion 21 and the engagement head of the molded surface fastener 1 are deformed. It becomes part 22.
- the lower end portion of the primary stem portion 71 has the same shape as the lower end portion of the stem portion 21.
- the primary stem portion 71 is formed in a truncated pyramid shape such as a quadrangular pyramid, a cylindrical shape, or a prismatic shape such as a quadrangular column according to the shape of the stem portion 21 of the molded surface fastener 1 to be manufactured. It is also possible.
- the protruding portion (temporary claw portion) 73 is formed by allowing synthetic resin to flow from the through hole 47 of the cylindrical body 42 into the concave groove portion 51 provided on the inner peripheral surface of the cylindrical body 42 in the primary molding step.
- the two projecting portions 73 project from the outer peripheral side surface of the primary stem portion 71 along the C direction.
- the molded protrusion 73 has a rod-like shape that exhibits a rounded cross section due to shrinkage or the like.
- the projecting portion 73 is not formed by filling the entire concave groove portion 51 provided on the inner peripheral surface of the cylindrical body 42 with the synthetic resin, but from the through hole 47 of the cylindrical body 42 to the inside of the concave groove portion 51.
- a part of the groove 51 (for example, a distance of about 0.01 mm or more and 0.04 mm or less from the through hole 47) so that the synthetic resin that has flown into the groove protrudes slightly from the formation range of the through hole 47 along the groove 51. It is formed by entering. That is, the synthetic resin flows into the concave groove 51 from the through hole 47 of the cylindrical body 42, so that the synthetic resin is easily cooled.
- the protrusion 73 molded in the primary molding step is a portion that becomes the claw portion 23 of the molded surface fastener 1 when the temporary element 70 is pressed from above in the secondary molding step.
- the molten synthetic resin is extruded from the extrusion nozzle 45, filled into the through hole 47 of the cylindrical body 42, and flows into the concave groove 51, and further, the synthetic molded body 11 is synthesized.
- the resin is carried on the outer peripheral surface of the die wheel 41 and is produced by solidifying while being cooled while half-rotating.
- the primary molded body 11 is continuously peeled off from the outer peripheral surface of the die wheel 41 by the pickup roller 46.
- the protruding portion 73 of the primary molded body 11 is formed by being smoothly pulled out from the concave groove portion 51 of the cylindrical body 42 through the through hole 47 while being deformed.
- the protrusion 73 of the primary molded body 11 is pulled out from the inner peripheral surface of the through hole 47 of the cylindrical body 42 when pulled out from the concave groove 51 of the cylindrical body 42, so that the outer peripheral side surface of the primary stem portion 71 is removed. It may be deformed into a shape that is curved or inclined upward so as to incline upward from the projecting tip. However, immediately after being peeled off from the die wheel 41, the primary compact 11 is sandwiched between the upper sandwiching roller 46a and the lower sandwiching roller 46b that are spaced apart from each other by a predetermined distance of the pickup roller 46.
- the protruding portion 73 curved or inclined above the temporary element 70 is pushed from above by the upper clamping roller 46a and partially bent (plastically deformed).
- the projecting portion 73 of the temporary element 70 can be projected in parallel with the upper surface of the base material portion 10 or inclined downward or curved toward the base material portion 10.
- the protrusion 73 of each temporary element 70 has an outer periphery of the primary stem portion 71 in the vertical direction when the temporary element 70 is viewed from the M direction. From a side surface, it protrudes in the horizontal direction substantially parallel to the upper surface of the base material part 10, or protrudes downward from the horizontal direction.
- the primary molded body 11 peeled off from the die wheel 41 is then conveyed toward the heating and pressing device 60 that performs the secondary molding process, and between the upper and lower pressing rollers 61 and 62 of the heating and pressing device 60. be introduced.
- each temporary element 70 of the primary molded body 11 is heated by the upper pressure roller 61. To be softened.
- the temperature of the roller peripheral surface of the upper pressing roller 61 is, as described above, a predetermined temperature that is not less than the melting point of the synthetic resin of the primary molded body 11 ⁇ 40 ° C. and not more than the melting point ⁇ 10 ° C. It is set to be.
- each temporary element 70 of the primary molded body 11 is pressed from above by the upper pressing roller 61 while the base portion 10 of the primary molded body 11 is supported from below by the lower pressing roller 62. The upper end of 70 is crushed.
- the upper end portion of the primary stem portion 71 and the left and right protruding portions 73 of the temporary element 70 are thermally deformed, and the engaging head having the head top end surface 22a flattened by the outer peripheral surface of the upper pressing roller 61 is obtained. 22 and the stem portion 21 are formed. At the same time, two claw portions 23 are formed to protrude from the protrusion 73 of the temporary element 70 to the outer peripheral side surface 22 c of the engagement head 22.
- the protrusion 73 formed on the temporary element 70 of the primary molded body 11 protrudes from the outer peripheral side surface of the primary stem 71 in the horizontal direction or in the downward direction from the horizontal direction as described above.
- the claw portion 23 that is deformed from the protruding portion 73 is formed from the outer peripheral side surface 22c of the engaging head 22 with the base material. It is formed so as to protrude downward (inclined) toward the portion 10.
- the molded surface fastener 1 of the first embodiment shown in FIG. 1 is manufactured stably and smoothly and efficiently.
- the molded surface fastener 1 that is long in the machine direction is conveyed toward a cutting portion (not shown), cut to a predetermined length at the cutting portion, and collected.
- the long molded surface fastener 1 is wound and collected in a roll shape around a collecting roller or the like in the long state.
- the engagement heads 22 of the respective engagement elements 20 are each provided with two fine claw portions 23 protruding along the C direction. ing.
- the claw portion 23 of the first embodiment has a concave claw back surface that curves downward from the head back surface 22b of the engagement head 22.
- the most distal end portion of the claw portion 23 of the first embodiment exists at a position below the head top end surface 22a of the engaging head portion 22.
- the molded surface fastener 1 of Example 1 has higher engagement strength (peeling strength) than a conventional general molded surface fastener that does not include the claw portion 23, and is engaged with the female surface fastener. Can be maintained stably.
- the head top end surface 22a and the outer peripheral side surface 22c of the engagement head 22 of each engagement element 20 are formed in a smooth continuous surface.
- the claw portion 23 provided to increase the engagement strength is formed with a small size with respect to the engagement head portion 22, and the upper surface of the claw portion 23 is inclined downward toward the claw tip. It is formed on a curved surface.
- claw part 23 has on the touch feeling of the molded surface fastener 1 can be made small.
- the molded surface fastener 1 of Example 1 is touched from the upper surface side where the engaging element 20 is erected, the molded surface fastener 1 has a smooth feel and a soft and supple feel. It can have a good touch as obtained.
- the molded surface fastener 1 according to the first embodiment having a high engagement strength and a good touch is a disposable diaper, a baby diaper cover, a supporter for protecting joints of limbs, a waist corset, a glove, and the like. It is suitably used for commodities that can be attached to and detached from the body.
- each concave groove 51 is continuously along the C direction over the entire area between the through holes 47 adjacent to each other in the C direction so as to connect the diameters along the C direction of the through holes 47 arranged in the C direction. Is formed.
- the through hole 47 and the concave groove 51 a serving as a concave portion are provided in the positional relationship shown in FIG. 15. It is also possible to use a molding apparatus having the formed cylindrical body 42a.
- the through hole 47 of the cylindrical body 42a shown in FIG. 15 is formed in the same form as the through hole 47 formed in the cylindrical body 42 shown in FIG. Further, the plurality of recessed groove portions (recessed portions) 51 a shown in FIG. 15 are recessed along the C direction on the inner peripheral surface of the cylindrical body 42. Moreover, these recessed groove parts 51a have the magnitude
- the groove 51a in FIG. 15 is formed along the C direction so as to be continuous with the diameter of the through hole 47 while intersecting with the circular outer peripheral edge of the through hole 47, and in the circumferential direction that is the M direction.
- the pitch is formed.
- the groove 51a in FIG. 15 is formed with a predetermined length from the circular outer peripheral edge of each through-hole 47 to the left and right along the C direction. Between the groove 51a adjacent in the C direction, a groove is formed.
- a flat surface (flat curved surface) where the groove 51a is not formed is provided as a non-grooved portion.
- the length from the circular outer peripheral edge of the through hole 47 in the groove 51a corresponds to the protrusion length of the protrusion 73 provided in the temporary element 70 of the primary molded body 11.
- the cylindrical body 42a having the through hole 47 and the concave groove 51a shown in FIG. 15 can be manufactured using the same method and means as the cylindrical body 42 of the first embodiment shown in FIG.
- the cylindrical body 42 shown in FIG. 9 is formed by forming the primary molded body 11 in the primary molding process using the cylindrical body 42a in which the through holes 47 and the recessed groove portions 51a are formed in the positional relationship shown in FIG. Compared with the case where it uses, the magnitude
- the primary molded body 11 having a plurality of temporary elements 70 in which the protruding portions 73 having a uniform protruding length from the primary stem portion 71 are formed. Further, by performing the above-described secondary molding process on the obtained primary molded body 11, the engagement element 20 provided with the claw portion 23 whose protrusion amount from the engagement head 22 is relatively uniform is provided. The molded surface fastener 1 having the above can be manufactured stably.
- Example 1 the primary molded body 11 in which the plurality of temporary elements 70 shown in FIGS. 11 to 14 are erected on the base material portion 10 is molded, and then the secondary molded body 11 is subjected to the secondary molding.
- the molded surface fastener 1 shown in FIG. 1 is manufactured.
- the temporary molded body 11 in which the plurality of temporary elements 70 shown in FIGS. 11 to 14 are erected on the base material portion 10 is cooled, for example, as it is, so that these temporary elements 70 are left as they are.
- a molded surface fastener provided as an engaging element That is, the primary molded body 11 molded by the molding apparatus 40 in the primary molding process described above can be provided as a molded surface fastener as it is.
- each engaging element of the molded surface fastener to be manufactured is different in form from the engaging element 20 shown in FIG. 2, and the truncated cone-shaped primary stem portion of the temporary element 70 shown in FIGS. 71 is provided as a stem portion, and two projecting portions 73 of the temporary element 70 are provided as minute claw portions (that is, the engaging element 70 in this case has a stem portion 71 and two claw portions 73). Further, each engaging element is not provided with an engaging head 22 like the engaging element 20 shown in FIG.
- the claw portion of the engaging element (that is, the protruding portion 73 of the first embodiment) is the upper end of the truncated cone-shaped stem portion (that is, the primary stem portion 71 of the first embodiment) in a plan view of the engaging element. Projecting outward from the outer peripheral edge in a horizontal direction parallel to the upper surface of the base material portion 10 or downward in the horizontal direction.
- the pickup roller 46 when the molded surface fastener (that is, the primary molded body 11 of the first embodiment) is continuously peeled off from the outer peripheral surface of the die wheel 41 by the pickup roller 46, the pickup roller 46 as described above.
- the upper nipping rollers 46a can press the left and right claws (that is, the protrusion 73 of the first embodiment) of the engaging element from above to be partially plastically deformed.
- the protruding direction of the left and right claw portions can be stably directed in the horizontal direction or downward from the horizontal direction.
- the molded surface fastener that is, the primary molded body 11 of Example 1
- the molded surface fastener is cooled while being transported horizontally by, for example, a transport device (not shown). You can also. Thereby, the left and right claw parts (that is, the protruding part 73 of Example 1) are further bent and deformed so as to hang downward due to their own weight, and the protruding direction of the claw part is changed to the upper surface of the base material part 10. It is possible to stably face the lower side than the parallel horizontal direction.
- the pawl portion of the engaging element is bent and deformed more actively downward. be able to. Accordingly, it is possible to more stably manufacture a molded surface fastener in which the claw portion of the engaging element is bent or curved and protrudes downward from the horizontal direction toward the base material portion 10.
- the upper end surface of the stem portion (that is, the primary stem portion 71 of Example 1) is formed in a circular shape.
- the claw width dimension of the minute claw part (that is, the projecting part 73 of Example 1) is 1/2 or less, preferably 1/3 or less, more preferably 1/4 of the diameter of the circular upper end surface of the stem part. It is set to the following size.
- the specific size of the engaging element is set as follows.
- the height dimension A of the engagement element is set to 0.05 mm to 1.5 mm, preferably 0.2 mm to 1.0 mm.
- the diameter of the circular upper end surface of the stem portion is set to 0.1 mm or more and 0.5 mm or less.
- the claw width dimension F of the claw portion is set to 0.01 mm or more and 0.10 mm or less, preferably 0.03 mm or more and 0.08 mm or less.
- the claw length dimension of the claw part is set to 0.01 mm or more and 0.04 mm or less.
- Such a molded surface fastener having the temporary element 70 of Example 1 as an engagement element can be provided with a high peel strength due to a minute claw portion with respect to the female surface fastener. Moreover, the same good touch and touch feeling as Example 1 can also be obtained stably.
- each primary molded body molded in the primary molding process can be provided as a molded surface fastener as it is. It is.
- FIG. 16 is a perspective view showing an engaging element of the molded surface fastener manufactured in the second embodiment.
- FIG. 17 is a plan view showing only the engaging element.
- the molded surface fastener 2 of the second embodiment is formed with the number of claw portions 23 provided on the engagement heads 22 of the respective engagement elements 20a being four different from the first embodiment. Except that the number of the claw portions 23 formed is changed, this is substantially the same as the molded surface fastener 1 described in the first embodiment.
- Example 2 Examples 3 and 4 to be described later, and each modification, a configuration different from the molded surface fastener 1 according to Example 1 described above will be mainly described. Moreover, about the part or member which has the structure substantially the same as the shaping
- the molded surface fastener 2 of Example 2 has a plurality of engaging elements 20a that stand vertically from the upper surface of the thin plate-like base material portion 10.
- the plurality of engaging elements 20a are arranged in alignment along the M direction (MD) and the C direction (CD).
- Each engagement element 20 a includes a stem portion 21 rising from the base material portion 10, a disc-shaped engagement head 22 formed integrally on the stem portion 21, and an outer peripheral edge portion of the engagement head 22. And four claw portions 23 projecting from each other.
- the stem portion 21 and the engagement head portion 22 of the second embodiment are formed in substantially the same manner as the stem portion 21 and the engagement head portion 22 in the engagement element 20 of the first embodiment.
- the four claw portions 23 are projected from the outer peripheral side surface 22c of the engagement head 22 in the M direction and the C direction along the radial direction of the engagement head 22. Yes. These four claw portions 23 are positioned at 0 °, 90 °, 180 °, and 270 ° with respect to the center of the circular engagement head 22 in a plan view of the engagement element 20a shown in FIG. Arranged regularly.
- the shape and size of each claw part 23 formed in the present Example 2 are the same as those of the claw part 23 provided in the molded surface fastener 1 of Example 1 described above.
- the molded surface fastener 2 having the engaging element 20a provided with the four claw portions 23 as described above is molded as shown in FIG. 7 as in the first embodiment.
- the cylindrical body 42a disposed on the die wheel 41 of the molding apparatus 40 is used as the cylindrical body 42 used in the first embodiment described above in order to provide the four claw portions 23 in each engagement element 20a. And has a different structure.
- the cylindrical body (sleeve) 42a used in the second embodiment includes a plurality of through holes 47 penetrating from the outer peripheral surface to the inner peripheral surface along the radial direction of the cylindrical body 42a, and the cylindrical body 42a. And a plurality of groove portions 52 serving as recesses provided in the inner peripheral surface.
- the through hole 47 formed in the cylindrical body 42a of the second embodiment is formed in the same manner as the through hole 47 formed in the cylindrical body 42 of the first embodiment. That is, the through holes 47 of the second embodiment are formed so as to penetrate from the outer peripheral surface of the cylindrical body 42a to the inner peripheral surface, and have a predetermined pitch in the M direction (circumferential direction) and the C direction of the cylindrical body 42a. It is formed with.
- the recessed groove portions (recessed portions) 52 formed on the inner peripheral surface of the cylindrical body 42a of the second embodiment are provided along the C direction in order to provide the four claw portions 23 in each engaging element 20a of the molded surface fastener 2. It has the some 1st ditch
- first groove portion 52a in the C direction and the second groove portion 52b in the M direction communicate with the through hole 47 formed in the cylindrical body 42a.
- first groove portion 52a and the second groove portion 52b each have a predetermined pitch on a straight line along the C direction and the M direction so as to connect the diameters of the plurality of through holes 47 arranged in the C direction and the M direction. It is formed with.
- the virtual extension line obtained by extending the first concave groove portion 52 a into the through hole 47 and the virtual extension line obtained by extending the second concave groove portion 52 b into the through hole 47 are the centers of the through holes 47. The positions are orthogonal to each other.
- the formation pitch of the through holes 47 provided in the cylindrical body 42a and the formation pitch in the circumferential direction of the groove 52 are made to correspond to each other. You may form a cylindrical body, without making the formation pitch of the groove part 52a and the 2nd groove part 52b correspond mutually.
- first concave groove portion 52a and the second concave groove portion 52b according to the second embodiment are continuously formed over the entire area between the adjacent through holes 47 along the C direction and the M direction.
- groove part 52b of the present Example 2 are C direction from the circular outer periphery of each through-hole 47, as demonstrated in above-mentioned Example 1 with reference to FIG. And it may be formed so as to extend by a predetermined length along the M direction.
- a flat surface on which the first groove portion 52a and the second groove portion 52b are not formed is a groove between the first groove portions 52a adjacent in the C direction and between the second groove portions 52b adjacent in the M direction. It is provided as a non-forming part.
- each temporary element 70 a includes a truncated cone-shaped primary stem portion 71 that rises from the base material portion 10, and four projecting portions 73 that extend outward from the outer peripheral side surface of the upper end portion of the primary stem portion 71. And have.
- the four projecting portions 73 arranged in one temporary element 70a have a first concave groove portion 52a and a first concave groove portion 52a in which a synthetic resin is recessed from the through hole 47 of the cylindrical body 42a to the inner peripheral surface of the cylindrical body 42a in the primary molding step. It shape
- each temporary element 70a is heated and pressed from above by the upper pressing roller 61.
- the molded surface fastener 2 having the plurality of engaging elements 20a shown in FIGS. 16 and 17 is manufactured stably and smoothly and efficiently.
- four minute claw portions 23 arranged on each engagement element 20a are formed from the four protrusions 73 provided on each temporary element 70a of the primary molded body 12, as described above.
- the number of the claw portions 23 provided in each engagement element 20a is four more than in the case of the first embodiment. For this reason, in the molded surface fastener 2 of the second embodiment, it is possible to easily obtain a higher engagement force than the molded surface fastener 1 manufactured in the first embodiment.
- the primary molded body 12 molded in the primary molding step can be provided as a molded surface fastener as it is. That is, the molded surface fastener provided in this case is formed by standing a plurality of temporary elements 70a shown in FIG. 19 and FIG. 20 on the base member 10 as engaging elements (that is, in this case)
- the engaging element 70a has a stem portion 71 and four claw portions 73). For this reason, the molded surface fastener has a high peel strength due to a minute nail portion relative to the female surface fastener, and can stably obtain a good feel and feel.
- FIG. 21 is a perspective view showing an engaging element of the molded surface fastener manufactured in the third embodiment.
- FIG. 22 is a plan view showing only the engaging element.
- the molded surface fastener 3 of the third embodiment includes a thin plate-like base material portion 10 and a plurality of engagement elements 20b that stand vertically from the upper surface of the base material portion 10.
- Each engagement element 20 b includes a stem portion 21 rising from the base material portion 10, a disk-shaped engagement head 22 formed integrally on the stem portion 21, and an outer peripheral edge portion of the engagement head 22.
- eight claw portions 23 projecting from each other.
- claw part 23 in the present Example 3 are substantially the same as each nail
- claw portions 23 are provided so as to protrude outward from the outer peripheral side surface 22c of the engagement head 22 along the radial direction of the engagement head 22. These eight claw portions 23 have an angle of 45 ° with respect to the adjacent claw portions 23 with respect to the center of the engagement head 22 having a circular shape in the plan view of the engagement element 20b shown in FIG. As shown in FIG.
- the molded surface fastener 3 having the engaging element 20b in which the eight claw portions 23 are arranged as described above is formed as shown in FIG. Manufactured using a manufacturing apparatus 30 having an apparatus 40 and a heating and pressing apparatus 60.
- molding apparatus 40 is several, penetrating from an outer peripheral surface to an internal peripheral surface along the radial direction of the cylindrical body 42b. It has a through hole 47 and a plurality of concave groove portions (concave portions) 53 that are recessed in the inner peripheral surface of the cylindrical body 42b.
- the through hole 47 formed in the cylindrical body 42b of the third embodiment is formed in the same manner as the through hole 47 formed in the cylindrical bodies 42 and 42a of the first and second embodiments.
- the concave groove portion 53 formed on the inner peripheral surface of the cylindrical body 42b of the third embodiment is for providing eight claw portions 23 on each engaging element 20b of the molded surface fastener 3.
- the groove portion 53 includes a plurality of first groove portions 53a formed along the C direction, a plurality of second groove portions 53b formed along the M direction (circumferential direction), a first groove portion 53a, A plurality of third groove portions 53c and a plurality of fourth groove portions 53d are formed with an inclination angle of 45 ° with respect to the second groove portion 53b.
- first groove portion 53a in the C direction, the second groove portion 53b in the M direction, the third groove portion 53c having a 45 ° inclination angle in the C direction and the M direction, and the plurality of fourth groove portions 53d is formed at a predetermined pitch so as to intersect with the circular outer peripheral edge of the through-hole 47 and to be continuous with the diameter of the through-hole 47.
- virtual extension lines obtained by extending the first concave groove portion 53 a to the fourth concave groove portion 53 d into the through holes 47 are arranged so as to intersect with each other at the center position of each through hole 47.
- the first concave groove portion 53a to the fourth concave groove portion 53d are predetermined from the circular outer peripheral edge of each through hole 47 as described in the first embodiment with reference to FIG. You may form so that only length may be extended.
- each temporary element 70 b includes a truncated cone-shaped primary stem portion 71 rising from the base material portion 10 and eight projecting portions 73 extending so as to project outward from the outer peripheral side surface of the upper end portion of the primary stem portion 71. And have.
- the eight protrusions 73 arranged in one temporary element 70b have first groove portions 53a to 53 in which synthetic resin is recessed from the through hole 47 of the cylindrical body 42b on the inner peripheral surface of the cylindrical body 42b. It is formed by flowing into the four concave groove portions 53d. For this reason, the eight projecting portions 73 intersect the C direction, the M direction, and an inclination angle of 45 ° from the outer peripheral side surface of the primary stem portion 71 along the radial direction of the circular upper surface of the primary stem portion 71. Protruding in the direction.
- each temporary element 70b is heated and pressed from above by the upper pressing roller 61.
- the molded surface fastener 3 having the plurality of engaging elements 20b shown in FIGS. 21 and 22 is manufactured stably and smoothly and efficiently.
- eight minute claws 23 arranged on each engagement element 20b are formed from the eight protrusions 73 provided on each temporary element 70b of the primary molded body 13.
- the primary molded body 13 molded in the primary molding step can be provided as a molded surface fastener as it is (that is, the engaging element of the molded surface fastener in this case).
- 70b has a stem portion 71 and eight claw portions 73).
- the number, shape, size, arrangement, and the like of the claw portions provided in each engaging element of the molded surface fastener are not limited to the first to third embodiments described above. However, it can be arbitrarily changed according to the usage of the molded surface fastener.
- the formation pitch of the grooves 51, 52, 53 can be arbitrarily changed so as not to correspond.
- the claw portion provided in the engaging head 22 by setting the formation pitch of the concave groove portions 51, 52, 53 provided on the inner peripheral surfaces of the cylindrical bodies 42, 42 a, 42 b smaller than the formation pitch of the through holes 47. It is possible to vary the number of 23 among the respective engaging elements.
- a plurality of concave groove portions 51, 52, 53 are formed in one cylindrical body 42, 42a, 42b with the same groove width and groove depth. ing.
- claw part provided in an engagement head differ between each engagement element mutually.
- a plurality of claw portions are provided for one engaging head, a plurality of claw portions protruding at different angles with respect to the one engaging head, or different sizes from each other. It is also possible to provide a plurality of claw portions.
- the aspect of the claw portion can be easily changed by changing the formation pattern of the recessed groove portion or the recessed portion provided in the cylindrical body of the forming apparatus 40 that performs the primary forming step.
- the formation pattern of the recessed groove part or the recessed part provided in the inner cylindrical body will be described with reference to some modified examples with reference to the drawings.
- 26 to 33 show, in each modification, a through hole 47 formed so as to penetrate from the outer peripheral surface of the cylindrical body 42b to the inner peripheral surface, and a concave groove portion 53 or a concave portion provided on the inner peripheral surface of the cylindrical body 42b.
- the groove part or recessed part formed in the internal peripheral surface of a cylindrical body with a broken line the groove bottom face of the recessed groove part or the bottom face of the recessed part is represented by the gray color.
- a plurality of concave groove portions 54a that are linearly arranged along the C direction are formed as concave portions on the inner peripheral surface of the cylindrical body 42c so as to have a large groove width and a striped pattern. It is recessed so as to form.
- the concave groove portion 51 disposed along the C direction on the inner peripheral surface of the cylindrical body 42 penetrates the single circular through hole 47 as shown in FIG. Only one is formed at a position overlapping the diameter of the hole 47.
- the groove width of each concave groove portion (concave portion) 54a is made larger than that in the first embodiment, and the interval (formation pitch) between adjacent concave groove portions 54a is reduced.
- the plurality of concave groove portions 54 a are arranged so as to cross the two circular through holes 47.
- the size of the through hole 47 formed in the cylindrical body 42c, the groove width dimension and the formation interval of the concave groove portion 54a formed on the inner peripheral surface of the cylindrical body 42c, and the like can be changed as appropriate so that one circular penetration
- the number of C-direction concave grooves 54a formed with respect to the hole 47 can be easily changed.
- a primary molded body is molded using a cylindrical body 42c in which a plurality of concave grooves 54a in the C direction are formed in one circular through hole 47. Further, by performing a secondary molding process on the primary molded body, molding having three or more claw portions regularly or irregularly projecting on the outer peripheral edge of the engagement head. A hook-and-loop fastener can be manufactured stably.
- the concave grooves 51 and 54 a in the C direction having a constant groove width dimension are formed on the inner peripheral surfaces of the cylindrical bodies 42 and 42 c with respect to one circular through hole 47. They are provided at a constant formation pitch so that there are one or more.
- a plurality of C-direction concave grooves having mutually different groove widths are provided on the inner peripheral surfaces of the cylindrical bodies 42, 42c, or a plurality of C-direction concave grooves are formed with different formation pitches. It is also possible to provide it.
- only the groove portion in the C direction is formed on the inner peripheral surface of the cylindrical body.
- only a plurality of concave groove portions 54b along the M direction (circumferential direction) may be provided as concave portions on the inner peripheral surface of the cylindrical body 42d.
- Modification 3 in FIG. 28 by providing only a plurality of concave groove portions 54c inclined at a predetermined angle with respect to the C direction or the M direction as concave portions on the inner peripheral surface of the cylindrical body 42e, It is also possible to manufacture a molded surface fastener.
- the inner peripheral surfaces of the cylindrical bodies 42b and 42c with respect to the through holes 47 of a predetermined size are provided. Not only the first concave groove portions 52a and 53a along the C direction, but also the second concave groove portions 52b and 53b along the M direction, the third concave groove portion 53c having an inclination angle of 45 ° in the C direction or the M direction, and the second Four concave groove portions 53d are provided at a predetermined pitch.
- the cylindrical body 42a also in the case of the above-described second embodiment (FIG. 18) and third embodiment (FIG. 23), and in the second modification (FIG. 27) and the third modification (FIG. 28).
- 42b, 42d, and 42e can be changed in size.
- the number of concave groove portions communicating with one circular through hole is reduced by reducing the formation pitch of the concave groove portions 52, 53, 54b, 54c provided in the inner peripheral surfaces of the cylindrical bodies 42a, 42b, 42d, 42e. Can be arbitrarily changed.
- the molded surface fastener which has the engaging element by which the some nail
- a plurality of concave groove portions 54d meandering in a wavy shape along the C direction are provided at a predetermined formation pitch as concave portions on the inner peripheral surface of the cylindrical body 42f.
- this modified example 4 by changing the size of the through-hole 47 drilled in the cylindrical body 42f, the groove width dimension and the formation pitch of the concave groove portion 54f, one or more communicating with one circular through-hole 47 or A plurality of concave groove portions 54d can be formed.
- a plurality of concave groove portions 54d meandering in a wavy shape are provided along the C direction on the inner peripheral surface of the cylindrical body 42f.
- a plurality of concave shapes meandering in a wavy shape are provided. It is also possible to recess the groove along the circumferential direction of the cylindrical body 42f in the M direction, or a direction inclined at a predetermined angle with respect to the C direction or the M direction.
- a molded surface fastener is manufactured using a cylindrical body 42f in which a plurality of through holes 47 are formed and a plurality of concave groove portions 54d meandering in a wavy shape are formed in the inner peripheral surface. Also good. As a result, it is possible to stably obtain a molded surface fastener having an engagement element in which a plurality of claw portions project regularly or irregularly on the outer peripheral edge of the engagement head.
- the inside of the cylindrical body 42g is completely opposite to the case of the cylindrical body 42a of the second embodiment described above in which the recessed groove 52 is formed along the C direction and the M direction.
- a plurality of rectangular recesses (concave portions) 55a are formed at predetermined intervals in the C direction and the M direction so that the peripheral surface remains along the C direction and the M direction.
- a plurality of rectangular recesses 55a are formed in the inner peripheral surface of the cylindrical body 42g of Modification 5 so that the inner peripheral surface of the cylindrical body 42g remains in a lattice shape along the C direction and the M direction. Yes.
- a plurality of rectangular recesses may be provided so that the lattice shape of the inner peripheral surface of the cylindrical body is formed in a direction inclined at a predetermined angle with respect to the C direction and the M direction. Is possible.
- the size of the through hole 47 formed in the cylindrical body 42h, the size and the formation pitch of the recess 55b, and the like can be appropriately changed.
- a plurality of square concave portions (concave portions) 55c are formed on the inner peripheral surface of the cylindrical body 42i so that the inner peripheral surface of the cylindrical body 42c and the square concave portion form a checkered pattern. It is recessed.
- the size of the through hole 47 formed in the cylindrical body 42c, the size and the formation pitch of the recess 55c, and the like can be appropriately changed.
- the checkered pattern by the recess 55c is formed along the C direction and the M direction.
- the checkered pattern by the recess 55c is formed at a predetermined angle with respect to the C direction or the M direction. It is also possible to form along the inclined direction.
- a plurality of regular hexagonal concave portions (concave portions) 55d are formed on the inner peripheral surface of the cylindrical body 42j at predetermined intervals so that the inner peripheral surface of the cylindrical body 42j remains as a tortoiseshell pattern. Is formed.
- the size of the through hole 47 formed in the cylindrical body 42j, the size and the formation pitch of the regular hexagonal concave portion 55d, and the like can be appropriately changed.
- a plurality of claw portions are regularly formed on the outer peripheral edge portion of the engaging head by manufacturing the molded surface fastener using the cylindrical bodies 42f to 42j shown in the modified examples 5 to 8 as described above. It is possible to stably obtain a molded surface fastener having engaging elements that protrude in an irregular or irregular manner.
- the concave groove portion or the concave portion of the present invention as described above only needs to have a gap into which molten synthetic resin can enter.
- you may form ambiguously for example by the boundary surface of a ditch
- a shape of the concave groove or the concave portion having an ambiguous boundary surface for example, there is one in which the inner peripheral surface of a cylindrical body is subjected to a texture processing or a satin processing.
- each molded surface fastener manufactured using the cylindrical bodies 42c to 42j shown in the first to eighth modifications a plurality of claw portions are regularly arranged on the engagement head of each engagement element. Or since it is protruding irregularly, it has a high engagement force stably with respect to the female surface fastener which has a loop. Moreover, the touch on the surface (upper surface) of a molded surface fastener can be made favorable.
- FIG. 34 is a perspective view showing an engaging element of the molded surface fastener manufactured in the fourth embodiment.
- FIG. 35 is a plan view showing only the engaging element.
- the molded surface fastener 4 of the fourth embodiment includes a thin plate-like base material portion 10 and a plurality of engagement elements 20c that stand vertically from the upper surface of the base material portion 10.
- Each engaging element 20 c includes a stem portion 21 rising from the base material portion 10, a disc-shaped engaging head 22 integrally formed on the stem portion 21, and an outer peripheral edge portion of the engaging head 22. And four claw portions 25 projecting from each other.
- the stem portion 21 and the engagement head portion 22 of the fourth embodiment are formed in substantially the same manner as the stem portion 21 and the engagement head portion 22 of the engagement element 20 of the first embodiment.
- the four claw portions 25 are arranged along the radial direction of the engagement head 22 from the outer peripheral side surface 22c of the engagement head 22 and from the engagement head 22 in the C direction. Projecting in the M direction. These four claw portions 25 are positioned at 0 °, 90 °, 180 °, and 270 ° with respect to the center of the circular engagement head 22 in a plan view of the engagement element 20c shown in FIG. Arranged regularly.
- the claw portion 25 of the fourth embodiment includes a pair of left and right first claw portions 25a protruding from the engaging head 22 in the C direction, and a pair of front and rear protruding from the engaging head 22 in the M direction.
- Second claw portion 25b in this case, in the plan view of the engagement element 20 c, the two first claw portions 25 a are provided so as to project in a point-symmetrical positional relationship with respect to the center of the engagement head 22.
- the two second claw portions 25b are also projected in a point-symmetrical positional relationship with respect to the center of the engaging head 22.
- the first claw portion 25a and the second claw portion 25b of the fourth embodiment have a form that hangs downward toward the tip like a claw of a bird like the claw portion 23 of the first embodiment.
- first claw portion 25a of the fourth embodiment is slightly smaller than the second claw portion 25b and protrudes from the outer peripheral side surface 22c of the engagement head 22.
- the fact that the first claw portion 25a is smaller than the second claw portion 25b means that the claw width dimension and the claw length dimension of the first claw part 25a (from the outer peripheral side surface 22c of the engaging head 22 to the claw tip position). It is said that at least one of the dimensions (preferably both dimensions) is smaller than that of the second claw portion 25b.
- each claw width dimension is 1/3 or less of the dimension (width dimension) in the M direction at the boundary portion 24 of the engagement element 20c. It is preferably formed with a minute size of 1/5 or less, more preferably 1/7 or less. Further, the claw width dimension of the first claw part 25a and the second claw part 25b is specifically set to 0.01 mm or more and 0.10 mm or less, preferably 0.03 mm or more and 0.08 mm or less. The claw length dimension of the first claw part 25a and the second claw part 25b is set to 0.01 mm or more and 0.04 mm or less.
- the molded surface fastener 4 of Example 4 having the above-described configuration is manufactured using a manufacturing apparatus 30a shown in FIG.
- the manufacturing apparatus 30a includes a molding apparatus 40a that performs a primary molding process, and a heating and pressing apparatus 60 that heats and presses the primary molded body 14 that is molded in the primary molding process.
- the heating and pressing device 60 of the fourth embodiment is formed in the same manner as the heating and pressing device 60 of the first embodiment shown in FIG.
- the molding apparatus 40a includes a die wheel 41a that is driven and rotated in one direction (counterclockwise direction in the drawing), and a peripheral surface of the die wheel 41a. And a pick-up roller 46 disposed downstream of the extrusion nozzle 45 in the rotation direction of the die wheel 41a.
- the extrusion nozzle 45 and the pickup roller 46 of the fourth embodiment are formed in the same manner as the extrusion nozzle 45 and the pickup roller 46 used in the molding apparatus 40 of the first embodiment shown in FIG. That is, the pickup roller 46 has a pair of upper and lower clamping rollers 46a and 46b that sandwich the below-described primary molded body 14 molded by the die wheel 41a from above and below.
- the die wheel 41a includes an outer cylindrical body (main sleeve) 42 serving as a mold member, a cylindrical auxiliary cylindrical body (sub-sleeve) 43 disposed in close contact with the inner side of the cylindrical body 42, a cylindrical body 42, and A rotation driving roller 44 that simultaneously rotates the auxiliary cylindrical body 43 in one direction.
- the die wheel 41a has a double cylindrical structure in which an outer cylindrical body 42 and an inner auxiliary cylindrical body 43 are concentrically rotatable.
- the outer cylindrical body 42 is referred to as a first cylindrical body 42
- the inner auxiliary cylindrical body 43 is referred to as a second cylindrical body 43.
- a cooling jacket (not shown) for circulating the coolant is provided inside the rotation driving roller 44.
- the outer first cylindrical body 42 in the fourth embodiment is formed in the same manner as the cylindrical body 42 used in the molding apparatus 40 of the first embodiment described above. That is, the first cylindrical body 42 of the fourth embodiment includes a plurality of through holes 47 that penetrate from the outer peripheral surface of the first cylindrical body 42 to the inner peripheral surface, and the first cylinder on the inner peripheral surface of the first cylindrical body 42. A plurality of groove portions 51 are provided that are recessed in parallel with the central axis direction of the body 42.
- the inner second cylindrical body 43 has a plurality of auxiliary recesses provided on the outer peripheral surface of the second cylindrical body 43 along the circumferential direction (M direction) of the second cylindrical body 43.
- a groove 57 is provided.
- the second cylindrical body 43 of the fourth embodiment can be manufactured using the same method as that for manufacturing the cylindrical body 42 of the first embodiment.
- the auxiliary concave groove portion 57 of the second cylindrical body 43 overlaps the diameter of the through hole 47 formed in the first cylindrical body 42 as shown in FIG.
- the inner cylindrical body 42 is formed along the circumferential direction of the inner cylindrical body 42 with a predetermined pitch in the axial direction so as to be perpendicular to the concave groove portion 51.
- the auxiliary recessed groove portion 57 of the second cylindrical body 43 is continuously recessed along the circumferential direction so as to cross the through hole 47 of the first cylindrical body 42.
- the auxiliary concave groove 57 has a flat groove bottom so that the cross section is a quadrangle, and a pair of groove sidewall surfaces arranged in parallel to face each other.
- the auxiliary concave groove 57 may have any shape, and may be formed to have a polygonal shape or a substantially U-shaped cross section.
- the auxiliary concave groove portion 57 of the fourth embodiment has a groove width and a groove depth that allow the synthetic resin forming the molded surface fastener 4 to flow in a molten state.
- the groove width (interval between the pair of groove side wall surfaces) of the auxiliary recessed groove portion 57 is set to 0.01 mm or more and 0.10 mm or less, preferably 0.03 mm or more and 0.08 mm or less.
- the groove width of the auxiliary concave groove portion 57 is 1/3 or less, preferably 1/5 or less, more preferably 1/7 or less of the dimension in the M direction of the through hole 47 provided in the first cylindrical body 42. Set to size.
- the groove depth of the auxiliary recessed groove portion 57 (the dimension from the outer peripheral surface of the inner cylindrical body 42 to the groove bottom surface of the recessed groove portion 51) is 0.005 mm or more and 0.05 mm or less, preferably 0.005 mm or more and 0.03 mm. In the following, it is more preferably set to 0.01 mm or more and 0.025 mm or less.
- a primary molding process is performed in which the primary molded body 14 is molded by the molding apparatus 40a.
- a primary molded body 14 in which a plurality of temporary elements 70c as shown in FIGS. 39 and 40 are integrally formed on the base member 10 is produced.
- the temporary element 70c includes a truncated cone-shaped primary stem portion 71 that rises from the base material portion 10, and two protruding portions 73 that protrude outward from the outer peripheral side surface of the upper end portion of the primary stem portion 71. (Hereinafter referred to as the first projecting portion 73), a rib portion 74 that bulges from the upper surface of the primary stem portion 71, and a continuous projection from both end edges of the rib portion 74 so as to project outside the primary stem portion 71.
- Two additional projecting portions 75 (hereinafter referred to as second projecting portions 75).
- the two first projecting portions 73 arranged in the temporary element 70c are concave groove portions in which synthetic resin is recessed from the through hole 47 of the first cylindrical body 42 on the inner peripheral surface of the first cylindrical body 42 in the primary molding step. It is formed by flowing into 51. For this reason, the two first projecting portions 73 project from the outer peripheral side surface of the primary stem portion 71 so as to project outward along the C direction.
- the rib portion 74 and the two second projecting portions 75 arranged in the temporary element 70 c are an auxiliary in which synthetic resin is recessed from the through hole 47 of the first cylindrical body 42 on the outer peripheral surface of the second cylindrical body 43. It is formed by flowing into the recessed groove portion 57. For this reason, the rib part 74 and the two 2nd protrusion parts 75 are continuously formed in the height position above the upper surface of the primary stem part 71 along the M direction.
- the primary molded body 14 molded by the die wheel 41a of the molding apparatus 40a is continuously peeled off from the outer peripheral surface of the die wheel 41a by the pickup roller 46 of the molding apparatus 40a.
- the two first protrusions 73 and the two second protrusions 75 disposed on the temporary element 70c are pressed from above by the upper clamping roller 46a of the pickup roller 46, and are partially bent and deformed.
- the first protrusion 73 and the second protrusion 75 are parallel or substantially parallel to the upper surface of the base member 10 or directed toward the base member 10 as in the case of the first embodiment described above. It can be protruded by being inclined or curved downward.
- the primary molded body 14 is conveyed toward the heating and pressing device 60, and a secondary molding process is performed.
- the primary molded body 14 passes between the upper pressing roller 61 and the lower pressing roller 62, whereby each temporary element of the primary molded body 14. Since the upper end portion of 70c is pressed from above while being heated by the upper pressing roller 61, the upper end portion of the temporary element 70c is crushed.
- the molded surface fastener 4 having the plurality of engaging elements 20c shown in FIGS. 34 and 35 is manufactured stably and smoothly and efficiently.
- the engagement head of each engagement element 20c is composed of two first protrusions 73 provided on each temporary element 70c of the primary molded body 14 and two second protrusions 75 (additional protrusions 75).
- Two first claws 25a projecting in the C direction from 22 and two second claws 25b projecting in the M direction from the engaging head 22 are formed. For this reason, a total of four claw portions 25 are formed on the engagement head portion 22 of each engagement element 20c.
- the die wheel 41a of the molding device 40a has the first protrusion 73.
- An outer first cylindrical body 42 for molding and an inner second cylindrical body 43 (auxiliary cylindrical body 43) for molding the second protrusion 75 (additional protrusion 75) are provided.
- the formation pattern of the groove 51 that is recessed on the inner peripheral surface of the first cylindrical body 42 and the formation pattern of the auxiliary groove 57 that is recessed on the outer peripheral surface of the second cylindrical body 43 are each in a simple shape. (Pattern).
- the C-direction is formed on the inner peripheral surface of one cylindrical body 42a. It is necessary to provide two types of concave groove portions 52 in a predetermined pattern, the first concave groove portion 52a and the second concave groove portion 52b in the M direction.
- the fourth embodiment as shown in FIG. 38, it is only necessary to form the concave groove 51 in the inner peripheral surface of the outer first cylindrical body 42 only in the C direction, and the inner second surface. It is only necessary to provide the auxiliary concave groove portion 57 on the outer peripheral surface of the cylindrical body 43 only in the M direction.
- claw part 25 in the engagement head part 22 is divided
- the cylindrical body 43 can be manufactured relatively easily.
- the four claw portions 25 are provided in each engagement element 20c, a high engagement force can be easily obtained. Further, the four claw portions 25 provided to increase the engagement strength are formed with a small size with respect to the engagement head 22. Thereby, since the influence which the nail
- the primary molded body 14 formed in the primary molding process and having the plurality of temporary elements 70c shown in FIGS. 39 and 40 can be provided as a molded surface fastener as it is. Is possible.
- the engaging element 70c of the molded surface fastener includes the stem part 71, the claw part 73, and the rib part). Part 74 and additional claw part 75).
- the engagement head is not provided in the engagement element.
- the claw portion and the additional claw portion of each engagement element are arranged in the horizontal direction parallel to the upper surface of the base material portion 10 or in the horizontal direction from the outer peripheral side surface or rib portion of the upper end portion of the truncated cone-shaped stem portion. It can be made to project stably so that it may hang downward toward base material part 10 rather than.
- the two C-direction first claw portions 25a and the two M-direction second claw portions 25b provided on the engagement element 20c have different sizes as described above.
- claw part 25a is formed in the magnitude
- claw part 25b is not specifically limited.
- the size of the groove 51 that is recessed on the inner peripheral surface of the first cylindrical body 42 and the size of the auxiliary groove 57 that is recessed on the outer peripheral surface of the second cylindrical body 43 may be changed.
- the first claw portion 25a in the C direction provided on the engaging element 20c is formed larger than the second claw portion 25b in the M direction, or the first claw portion 25a in the C direction and the second claw in the M direction. It is also possible to form the portion 25b with the same size.
- assistant recessed part can be suitably changed according to the number of nail
- the concave groove 51 along the C direction is provided in the inner peripheral surface of the first cylindrical body 42, and the auxiliary concave portion along the M direction is provided on the outer peripheral surface of the second cylindrical body 43.
- a groove 57 is provided in a recessed manner.
- the groove portion along the M direction is recessed on the inner peripheral surface of the first cylindrical body 42, and the auxiliary groove portion along the C direction is recessed on the outer peripheral surface of the second cylindrical body 43. May be.
- FIG. 1 an example of the formation pattern of the concave groove portion 52 of the first cylindrical body 42a and the auxiliary concave groove portion 58 of the second cylindrical body 43a is shown in FIG.
- a first groove 52a along the C direction and a second groove 52b along the M direction are formed in the inner peripheral surface of the outer first cylindrical body 42a.
- an auxiliary groove portion 58 disposed with an inclination angle of 45 ° with respect to the C direction and the M direction is provided in the inner peripheral surface of the inner second cylindrical body 43a.
- the case where the primary molding process of the molded surface fastener is performed using the molding apparatus 40 having the die wheel 41 shown in FIG. is doing.
- the case where the primary molding process of the molded surface fastener is performed using the molding apparatus 40a having the die wheel 41a shown in FIG. 36 is described.
- a die wheel that is driven and rotated in one direction, a die wheel, A press wheel which is arranged with a predetermined interval between them and is driven to rotate in a direction opposite to the die wheel, and an extrusion nozzle which discharges a molten synthetic resin material toward the gap between the die wheel and the press wheel.
- An apparatus can be used.
- the die wheel of the molding apparatus has the same structure as the die wheel 41 described in the first embodiment or the like, or the die wheel 41a described in the fourth embodiment. That is, in the die wheel according to the other embodiment, as described in the first embodiment and the like, the cylindrical body 42 in which a plurality of through holes and a plurality of concave grooves are formed, and the rotation that rotates the cylindrical body 42. Drive roller 44.
- the first cylindrical body 42 in which a plurality of through holes and a plurality of concave grooves are formed, and the second cylindrical body in which auxiliary concave grooves are recessed in the outer peripheral surface ( Auxiliary cylinder) 43 and a rotation driving roller 44 for rotating the first cylinder 42 and the second cylinder 43.
- a molding side belt mechanism is arranged with a predetermined interval between a molding side belt mechanism that rotates and travels in one direction and the molding side belt mechanism.
- the molding side belt mechanism has an endless belt as a mold member and a pair of rotating rollers around which the endless belt is wound to rotate the endless belt in one direction.
- the endless belt has a plurality of through-holes and a plurality of concave grooves similar to the through-holes and the concave grooves provided in the cylindrical body of Example 1 or the like, so that the stem portion of the primary molded body is formed.
- the press-side belt mechanism includes an endless belt for pressing and a pair of rotating rollers around which the endless belt for pressing is wound and rotates the endless belt for pressing.
- an outer first endless belt serving as a mold member, and a second endless belt (auxiliary endless belt) disposed in close contact with the inner side of the outer first endless belt A belt having a pair of rotating rollers on which a first endless belt and a second endless belt are wound and simultaneously rotated in one direction may be used.
- the first endless belt is provided with a plurality of through holes and a plurality of concave grooves similar to the through holes and the concave grooves provided in the first cylindrical body of Example 4 or the like described above.
- the second endless belt is provided with a plurality of auxiliary concave grooves similar to the auxiliary concave grooves provided on the outer peripheral surface of the second cylindrical body in Example 4 described above.
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Abstract
Description
例えば、特許文献1に記載されている面ファスナーは、平板状の基材部に、複数の雄型係合素子が立設されて形成されている。また、各係合素子は、錐台状のステム部と、ステム部上に一体形成される係合頭部とを有しており、係合頭部は、ステム部から、あらゆる方向に実質的に等しい体積で張り出して形成される。
例えば特許文献3に記載されている製造方法では、先ず、図42に示すように平板状の基材部と、基材部に立設されるステム部と、ステム部上に一体形成される一次頭部とを有する一次成形体80を成形する一次成形工程が行われる。その後、一次成形体80をカレンダーに通過させて一次成形体80の一次頭部を押圧することにより、一次頭部を径方向に平たく延ばして係合頭部に成形する二次成形工程が行われる。
また、前記金型部材の内側に前記金型部材の内周面に密接して配され、前記金型部材の前記貫通孔に連通する補助凹部が外周面に凹設された補助金型部材を更に有する前記成形装置を用いて、前記係合素子に、前記ステム部の上面から上方に膨出するリブ部と、前記リブ部から前記ステム部の外側に向けて突出する付加爪部とを成形することを含んでいることが好ましい。
また、本発明の成形装置は、前記金型部材の内側に前記金型部材の内周面に密接して配され、前記金型部材の前記貫通孔に連通する補助凹部が外周面に凹設された補助金型部材を有し、前記補助金型部材は、前記金型部材と同期回転することが好ましい。
この場合、各凹溝部の溝幅は0.005mm以上0.1mm以下に設定され、各凹溝部の溝深さは0.005mm以上0.05mm以下に設定されていることが好ましい。
例えば、係合素子20における基材部10の上面からの上下方向の高さ寸法Aは、0.05mm以上1.5mm以下に、好ましくは0.2mm以上1.0mm以下に設定される。係合頭部22の平面視における係合頭部22の直径Bは、0.2mm以上0.6mm以下に設定される。なお、例えば係合頭部22が平面視にて多角形を呈する場合は、係合頭部22の平面視における係合頭部22のM方向における寸法が、0.2mm以上0.6mm以下に設定される。
この製造装置30は、一次成形工程を行う成形装置40と、一次成形工程により成形された一次成形体11を加熱して押圧する加熱押圧装置60とを有する。
この場合、一次円筒体42は、従来から公知なニッケル、ステンレス鋼などの金属から作製される。例えば、所定の厚さ及び長さの金属板材を圧延等により形成し、その金属板材を円筒に丸めて溶接することにより、継ぎ目が無いシームレスの一次円筒体42が作製される。
ここで、本実施例1の成形装置40で成形される一次成形体11(予備成形体とも言う)は、薄板状の基材部10と、基材部10の上面に立設される複数の仮素子70とを有する。この一次成形体11の基材部10は、そのまま成形面ファスナー1の基材部10となる。
係合素子の高さ寸法Aは、0.05mm以上1.5mm以下に、好ましくは0.2mm以上1.0mm以下に設定される。ステム部の円形上端面の直径は、0.1mm以上0.5mm以下に設定される。爪部の爪幅寸法Fは、0.01mm以上0.10mm以下に、好ましくは0.03mm以上0.08mm以下に設定される。爪部の爪長さ寸法は、0.01mm以上0.04mm以下に設定される。
上述のように本実施例2で製造される成形面ファスナー2は、各係合素子20aに設けられる爪部23の個数が、前述の実施例1の場合よりも多い4つである。このため、本実施例2の成形面ファスナー2では、前述の実施例1で製造される成形面ファスナー1よりも更に高い係合力を容易に得ることができる。また、各爪部23自体の大きさ及び形態は前述の実施例1の場合と同じであるため、成形面ファスナー2の表面(上面)における肌触りを良好なものにすることができる。
なお、前述したように、本実施例2においても、一次成形工程で成形される一次成形体12を、そのまま成形面ファスナーとして提供することも可能である。すなわち、この場合に提供される成形面ファスナーは、図19及び図20に示した複数の仮素子70aが係合素子として基材部10上に立設されて形成されている(すなわち、この場合の係合素子70aは、ステム部71と4つの爪部73とを有する)。このため、当該成形面ファスナーは、雌型面ファスナーに対して微小な爪部による高い剥離強度を備えるとともに、良好な肌触りや触り心地を安定して得ることができる。
なお前述のように、本実施例3では、一次成形工程で成形される一次成形体13を、そのまま成形面ファスナーとして提供することも可能である(すなわち、この場合の成形面ファスナーの係合素子70bは、ステム部71と8つの爪部73とを有する)。
この製造装置30aは、一次成形工程を行う成形装置40aと、一次成形工程により成形された一次成形体14を加熱して押圧する加熱押圧装置60とを有する。この場合、本実施例4の加熱押圧装置60は、図7に示した前述の実施例1の加熱押圧装置60と同様に形成されている。
すなわち、この他の形態に係るダイホイールは、前述の実施例1等で説明したように、複数の貫通孔及び複数の凹溝部が形成された円筒体42と、その円筒体42を回転させる回転駆動ローラ44とを有する。或いは、前述の実施例4等で説明したように、複数の貫通孔及び複数の凹溝部が形成された第1円筒体42と、外周面に補助凹溝部が凹設された第2円筒体(補助円筒体)43と、これらの第1円筒体42及び第2円筒体43を回転させる回転駆動ローラ44とを有する。
10 基材部
11,12,13 一次成形体
14 一次成形体
20 係合素子
20a,20b 係合素子
20c 係合素子
21 ステム部
22 係合頭部
22a 頭部頂端面
22b 頭部裏面
22c 外周側面
23 爪部
24 境界部
25 爪部
25a 第1爪部
25b 第2爪部
30,30a 製造装置
40,40a 成形装置
41,41a ダイホイール
42 円筒体(スリーブ又は第1円筒体)
42a~42j 円筒体
43,43a 補助円筒体(第2円筒体)
44 回転駆動ローラ
45 押出ノズル
46 ピックアップローラ
46a 上側挟持ローラ
46b 下側挟持ローラ
47 貫通孔
51,51a 凹部(凹溝部)
52 凹部(凹溝部)
52a 第1凹溝部
52b 第2凹溝部
53 凹部(凹溝部)
53a 第1凹溝部
53b 第2凹溝部
53c 第3凹溝部
53d 第4凹溝部
54a,54b 凹部(凹溝部)
54c,54d 凹部(凹溝部)
55a,55b 凹部(凹陥部)
55c,55d 凹部(凹陥部)
57 補助凹溝部
58 補助凹溝部
60 加熱押圧装置
61 上側押圧ローラ(カレンダローラ)
62 下側押圧ローラ(カレンダローラ)
70,70a 仮素子
70b,70c 仮素子
71 一次ステム部
73 突出部(第1突出部)
74 リブ部
75 付加突出部(第2突出部)
A 係合素子の高さ寸法
B 係合頭部の直径
C 係合頭部の高さ寸法
D 係合素子の境界部における直径
E 係合頭部の張り出し寸法
F 爪幅寸法
θ 係合頭部の張り出し角度
MD 機械方向
CD 直交方向
Claims (11)
- 平板状の基材部(10)の上面に複数の係合素子(20,20a,20b,20c)が立設され、各係合素子(20,20a,20b,20c)は、前記基材部(10)から立ち上がるステム部(21)と、前記ステム部(21)上に一体的に形成される係合頭部(22)とを有する合成樹脂製成形面ファスナー(1,2,3,4) を製造する製造方法にあって、前記基材部(10)と、前記基材部(10)に立設される複数の仮素子(70,70a,70b,70c)とを有する一次成形体(11,12,13,14) を成形する一次成形工程と、前記一次成形体(11,12,13,14) の前記仮素子(70,70a,70b,70c)を加熱するとともに前記仮素子(70,70a,70b,70c)を上方から押し潰すことにより前記成形面ファスナー(1,2,3,4) を成形する二次成形工程とを含む製造方法において、
前記一次成形工程にて、外周面から内周面に貫通するように穿設された複数の貫通孔(47)、及び前記内周面に凹設された複数の凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)を備え、各貫通孔(47)が少なくとも1つの前記凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)に連通する金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)と、前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)を所定の速度で回転させる駆動部(44)とを有する成形装置(40)を用いて、少なくとも一部の前記仮素子(70,70a,70b,70c)が、前記基材部(10)から起立する一次ステム部(71)と、前記一次ステム部(71)の上端部における外周側面から突出する少なくとも1つの突出部(73)とを有する前記一次成形体(11,12,13,14) を連続的に成形すること、及び、
前記二次成形工程にて、前記仮素子(70,70a,70b,70c)の上端部を上方から押し潰すことにより、前記ステム部(21)と前記係合頭部(22)とを成形するとともに、前記係合頭部(22)の外周縁部に突設される少なくとも1つの爪部(23)を前記突出部(73)から成形すること、
を含んでなることを特徴とする成形面ファスナーの製造方法。 - 前記金型部材(42a,42b) の内側に前記金型部材(42a,42b) の内周面に密接して配され、前記金型部材(42a,42b)の前記貫通孔(47)に連通する補助凹部(57,58) が外周面に凹設された補助金型部材(43,43a)を更に有する成形装置(40a) を用いて、前記仮素子(70c) に、前記一次ステム部(71)の上面から上方に膨出するリブ部(74)と、前記リブ部(74)から前記一次ステム部(71)の外側に向けて突出する付加突出部(75)とを成形すること、及び、
前記二次成形工程にて、前記爪部(23)を前記突出部(73)及び前記付加突出部(75)から成形すること、
を含んでなる請求項1記載の成形面ファスナーの製造方法。 - 平板状の基材部(10)の上面に複数の係合素子(70,70a,70b,70c)が立設される合成樹脂製の成形面ファスナーを製造する製造方法にあって、
外周面から内周面に貫通するように穿設された複数の貫通孔(47)、及び前記内周面に凹設された複数の凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)を備え、各貫通孔(47)が少なくとも1つの前記凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)に連通する金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)と、前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)を所定の速度で回転させる駆動部(44)とを有する成形装置(40)を用いて、前記係合素子(70,70a,70b,70c)が、前記基材部(10)から起立するステム部(71)と、前記ステム部(71)の上端部における外周側面から突出する少なくとも1つの爪部(73)とを有する前記成形面ファスナーを成形すること、
を含んでなることを特徴とする成形面ファスナーの製造方法。 - 少なくとも一部の前記係合素子(70,70a,70b,70c)の前記爪部(73)を、前記ステム部(71)の外周側面から、前記基材部(10)の上面と平行に又は前記基材部(10)に向けて突出するように変形させることを含んでなる請求項3記載の成形面ファスナーの製造方法。
- 前記金型部材(42a,42b) の内側に前記金型部材(42a,42b) の内周面に密接して配され、前記金型部材(42a,42b)の前記貫通孔(47)に連通する補助凹部(57,58) が外周面に凹設された補助金型部材(43,43a)を更に有する前記成形装置(40a) を用いて、前記係合素子(70c) に、前記ステム部(71)の上面から上方に膨出するリブ部(74)と、前記リブ部(74)から前記ステム部(71)の外側に向けて突出する付加爪部(75)とを成形することを含んでなる請求項3又は4記載の成形面ファスナーの製造方法。
- 前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)として、円筒形状を有する部材を用いてなることを含んでなる請求項1~5のいずれかに記載の成形面ファスナーの製造方法。
- 金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)と、前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)を所定の速度で回転させる駆動部(44)と、前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)に向けて溶融した合成樹脂材料を吐出する押出ノズル(45)とを有し、基材部(10)の上面に複数の係合素子(20,20a,20b,20c)が立設される合成樹脂製の成形面ファスナーの製造に用いられる成形装置(40)において、
前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)は、外周面から内周面に貫通するように穿設された複数の貫通孔(47)と、前記内周面に凹設された複数の凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)とを備え、
前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)の各貫通孔(47)は、少なくとも1つの前記凹部(51,52,53,54a,54b,54c,54d,55a,55b,55c,55d)に連通してなる
ことを特徴とする成形装置。 - 前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)は、円筒形状を有し、
前記金型部材(42,42a,42b,42c,42d,42e,42f,42g,42h,42i,42j)と前記駆動部(44)とを用いてダイホイール(41,41a)が形成されてなる、
請求項7記載の成形装置。 - 前記金型部材(42a,42b) の内側に前記金型部材(42a,42b) の内周面に密接して配され、前記金型部材(42a,42b)の前記貫通孔(47)に連通する補助凹部(57,58) が外周面に凹設された補助金型部材(43,43a)を有し、
前記補助金型部材(43,43a)は、前記金型部材(42a,42b) と同期回転してなる、
請求項7又は8記載の成形装置。 - 前記凹部(51,52,53,54a,54b,54c,54d)は、直線状の凹溝部(51,52,53,54a,54b,54c)又は波形に湾曲する凹溝部(54d) である請求項7~9のいずれかに記載の成形装置。
- 各凹溝部(51,52,53,54a,54b,54c,54d)の溝幅は0.005mm以上0.1mm以下に設定され、
各凹溝部(51,52,53,54a,54b,54c,54d)の溝深さは0.005mm以上0.05mm以下に設定されてなる、
請求項10記載の成形装置。
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