WO2019159223A1 - 成形面ファスナー及び成形面ファスナーの製造方法 - Google Patents
成形面ファスナー及び成形面ファスナーの製造方法 Download PDFInfo
- Publication number
- WO2019159223A1 WO2019159223A1 PCT/JP2018/004843 JP2018004843W WO2019159223A1 WO 2019159223 A1 WO2019159223 A1 WO 2019159223A1 JP 2018004843 W JP2018004843 W JP 2018004843W WO 2019159223 A1 WO2019159223 A1 WO 2019159223A1
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- WIPO (PCT)
- Prior art keywords
- magnetic
- wall
- surface fastener
- molded surface
- synthetic resin
- Prior art date
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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
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B13/00—Hook or eye fasteners
- A44B13/0005—Hook or eye fasteners characterised by their material
- A44B13/0023—Hook or eye fasteners characterised by their material made of plastics
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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
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
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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
- A44B18/0046—Fasteners made integrally of plastics
- A44B18/0061—Male or hook elements
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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
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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
- 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
- B29C43/24—Calendering
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44D—INDEXING SCHEME RELATING TO BUTTONS, PINS, BUCKLES OR SLIDE FASTENERS, AND TO JEWELLERY, BRACELETS OR OTHER PERSONAL ADORNMENTS
- A44D2203/00—Fastening by use of magnets
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0008—Magnetic or paramagnetic
Definitions
- the present invention relates to a molded surface fastener in which a plurality of engaging elements are erected on a thin plate-like base, and a method for manufacturing the molded surface fastener.
- Seats for automobiles and trains, various sofas, office chairs, etc. are made of fiber cloth, natural or synthetic leather, etc. on the surface of a cushion (foam) molded into a predetermined shape using foamable resin. It may be configured by depositing a skin material.
- the cushion body used for such various seats may have a curved surface having an uneven shape that satisfies ergonomics in order to maintain a sitting posture that does not get tired even when seated for a long time.
- a method is often employed in which after the cushion body is formed into a desired shape, the surface of the cushion body obtained is covered and fixed.
- a molded surface fastener having a plurality of hook-like engaging elements is generally used as means for fixing the front surface of the cushion body and the back surface of the skin material.
- the molded surface fastener is formed by arranging a plurality of hook-shaped male engagement elements on one surface of a base material portion made of a thermoplastic resin. Such a molded surface fastener is attached to a cavity surface of a mold, and foam molding of the cushion body is performed using the mold to which the molded surface fastener is attached. Thereby, a molded surface fastener is integrated so that an engagement element may be exposed to the surface of the molded cushion body.
- a plurality of loop-shaped female engagement elements that can be engaged with the engagement elements of the molded surface fastener are provided on the back surface of the skin material that covers the cushion body.
- magnetic force is used as means for attaching the molded surface fastener to the cavity surface of the mold when foaming the cushion body.
- a magnet may be embedded in a fastener mounting surface of a mold, while a molded surface fastener may be attached with a magnetic material that is magnetically attracted by a magnet of the mold or may contain a magnetic material partially.
- the monofilament containing the magnetic material is fixed to the base portion of the molded surface fastener, or the film containing the magnetic material is laminated on the base portion of the molded surface fastener.
- a magnetic material is applied to the flat base portion of the molded surface fastener.
- a magnetic material is partially contained in a molded surface fastener, for example, by performing two-color molding using a synthetic resin material containing a magnetic material (magnetic particles) and a synthetic resin material not containing a magnetic material.
- a method for producing a molded surface fastener is generally used.
- An example of a molded surface fastener manufactured by performing such two-color molding is described in International Publication No. 2017/141436 (Patent Document 1).
- the molded surface fastener described in Patent Document 1 is shown in FIG.
- the part containing the magnetic particle of a molded surface fastener is attached
- the molded surface fastener 100 of Patent Document 1 includes a thin plate-like base portion 101 (also referred to as a base material portion), and left and right resin intrusion prevention wall portions 102 arranged along the length direction on left and right side edges of the base portion 101.
- a plurality of hook-like engagement elements 103 disposed between the left and right resin intrusion prevention wall portions 102, a lateral wall portion 104 disposed along the left-right direction, and a width from the left and right side edges of the base portion 101 toward the outside.
- a fin piece 105 extending in the direction.
- the left and right resin intrusion prevention wall portions 102 in Patent Document 1 include a first vertical wall row 111 formed on the inner side in the width direction (near the center portion of the base portion 101), and the outer side in the width direction (the left and right side edge portions of the base portion 101).
- column 112 formed in the side and the connection wall part 113 which connects between the 1st vertical wall row
- the first vertical wall row 111 and the second vertical wall row 112 have a plurality of divided vertical wall portions 115 arranged intermittently at a constant pitch.
- the divided vertical wall portions 115 of the first vertical wall row 111 and the divided vertical wall portions 115 of the second vertical wall row 112 are staggered with their installation positions shifted in the length direction so as to be alternated. Has been placed.
- the connecting wall portion 113 of the resin intrusion prevention wall portion 102 is divided into a front end portion (or a rear end portion) of the divided vertical wall portion 115 arranged in the first vertical wall row 111 and a second vertical wall row 112.
- the rear end portion (or front end portion) of the vertical wall portion 115 is connected to each other.
- the divided vertical wall portion 115 arranged in the first vertical wall row 111 and the two divided vertical wall portions 115 arranged in the adjacent second vertical wall row 112 via the two connecting wall portions 113 and It is connected.
- the height dimension from the upper surface of the base 101 in each connecting wall 113 is set to the same size as the divided vertical wall 115 of the first vertical wall row 111 and the second vertical wall row 112. Therefore, the left and right resin intrusion prevention wall portions 102 are fixed by the divided vertical wall portion 115 of the first vertical wall row 111, the connecting wall portion 113, and the divided vertical wall portion 115 of the second vertical wall row 112. It is continuously formed so as to meander in a zigzag manner with a height dimension of.
- the left and right resin intrusion prevention wall portions 102 contain magnetic particles.
- the base 101, the engaging element 103, and the lateral wall 104 are substantially free of magnetic particles.
- each resin intrusion prevention wall portion 102 is formed with a concentration gradient portion that reduces the content concentration of the magnetic particles downward.
- foam molding of the cushion body it is possible to prevent the foamed resin material from entering the engagement region from the outer region of the resin intrusion prevention wall portion 102 beyond the resin intrusion prevention wall portion 102.
- the adhesion between the part containing the magnetic particles and the part containing no magnetic particles in the molded surface fastener 100 can be improved.
- the molded surface fastener 100 of Patent Document 1 when magnetic particles are contained in a synthetic resin, generally the flexibility of the synthetic resin is lowered. Moreover, there exists a tendency for the softness
- a magnet is embedded in the fastener attachment surface.
- a magnet provided on a fastener mounting surface of a mold may be formed with a reduced width dimension in view of cost and the like.
- the molded surface fastener 100 of Patent Document 1 shown in FIG. 16 is formed by increasing the width dimension of the resin intrusion prevention wall portion 102 as described above in order to have appropriate flexibility.
- the molded surface fastener 100 having the resin intrusion prevention wall portion 102 having a larger width dimension is fixed to the fastener mounting surface of the mold by, for example, being adsorbed by an elongated magnet having a smaller width dimension, In some cases, the width dimension between the outer surfaces of the resin intrusion prevention wall portion 102 becomes larger than the width dimension of the elongated magnet.
- one of the left and right resin intrusion prevention walls 102 is attracted by the elongated magnet of the mold, and the position of the molded surface fastener 100 is likely to shift in the width direction with respect to the fastener mounting surface of the mold. There was a problem. Furthermore, if the position of the molded surface fastener 100 is shifted in the width direction in this way, it is considered that one of the left and right resin intrusion prevention wall portions 102 in the molded surface fastener 100 cannot be brought into close contact with the mold. At the time of foam molding of the cushion body, the foamed resin material may enter the engagement region from the outer region of the resin intrusion prevention wall portion 102 beyond the resin intrusion prevention wall portion 102.
- the left and right resin intrusion prevention walls 102 have a complicated shape that is continuous in a zigzag shape with a certain height dimension. Furthermore, in this case, each of the divided vertical wall portions 115 forming the resin intrusion prevention wall portion 102 is elongated in the length direction, and the connecting wall portion 113 forming the resin intrusion prevention wall portion 102 is elongated in the width direction. Is formed.
- the molding surface fastener 100 of Patent Document 1 having the resin intrusion prevention wall portion 102 having such a complicated shape contains magnetic particles using a molding device having a die wheel as described in Patent Document 1, for example. Cavity space provided in the die wheel to form the left and right resin intrusion prevention wall portions 102 when molding the molten synthetic resin and the molten synthetic resin not containing magnetic particles while discharging them toward the die wheel However, it is formed in a complicated and thin shape corresponding to the resin intrusion prevention wall portion 102.
- the molten synthetic resin is less fluid than, for example, synthetic resins that do not contain magnetic particles, thus preventing resin penetration. It becomes difficult to fill the cavity of the wall 102. As a result, the resin intrusion prevention wall portion 102 cannot be formed into a predetermined shape, or the magnetic particles leak from the resin intrusion prevention wall portion 102 and enter the hook-shaped engagement element 103, thereby increasing the strength of the engagement element 103. In some cases, such as lowering.
- a synthetic resin not containing magnetic particles may enter the resin intrusion prevention wall portion 102 in the resin intrusion prevention wall portion 102.
- the synthetic resin not including magnetic particles enters the resin intrusion prevention wall portion 102 to form the resin intrusion prevention wall portion 102
- the synthetic resin not including the magnetic particles and the synthetic resin including the magnetic particles include The resin intrusion prevention wall portion 102 may mix and appear on the outer surface of the resin intrusion prevention wall portion 102. In such a case, for example, when performing an image inspection to check whether or not the magnetic particle is appropriately contained in the resin intrusion prevention wall portion 102, it may be difficult to distinguish the particle.
- the present invention has been made in view of the above problems, and its purpose is to perform two-color molding using a molten synthetic resin containing magnetic particles and a molten synthetic resin substantially free of magnetic particles.
- a molded surface fastener molded by performing a portion such as an engagement element, in which a portion containing magnetic particles is stably molded into a predetermined shape, and is molded from a synthetic resin substantially free of magnetic particles
- An object of the present invention is to provide a molded surface fastener in which leakage of magnetic particles to the surface is suppressed and a manufacturing method for manufacturing the molded surface fastener.
- a molded surface fastener provided by the present invention includes a thin plate-like base portion, left and right outer wall portions erected along a length direction on the upper surface of the base portion, and the left and right outer walls.
- a molded surface fastener having a plurality of engaging elements disposed between the portions, and a first synthetic resin and a second synthetic resin containing magnetic particles in a certain ratio are melted and integrated with each other At least upper ends of the left and right outer wall portions are formed by only the first synthetic resin, and left and right magnetic wall portions at least an upper end portion formed by only the second synthetic resin are erected on the upper surface of the base portion.
- the left and right magnetic wall portions are characterized in that they are respectively arranged along the length direction at positions between the outer wall portion and the engagement element in the width direction.
- the magnetic wall portion has a mixed region formed by mixing the first synthetic resin and the second synthetic resin.
- the base portion is recessed in the upper surface portion of the base portion, and is disposed between each outer wall portion and each magnetic wall portion, and between each engagement element and each magnetic wall portion. It is preferable to have a recessed groove portion. In this case, it is preferable that the recessed groove portion has a certain groove depth from the upper surface of the base portion and is continuously recessed along the length direction. Further, the concave groove portion has an inner concave groove portion arranged closer to the engaging element than the magnetic wall portion, and an outer concave groove portion arranged closer to the outer wall portion than the magnetic wall portion, It is preferable that the width dimension of the inner concave groove part and the width dimension of the outer concave groove part have different sizes.
- a height dimension of the magnetic wall portion is the same as a height dimension of the outer wall portion.
- the said magnetic wall part has a some magnetic wall body distribute
- each magnetic wall has a mixed region formed by mixing the first synthetic resin and the second synthetic resin, and the mixed region is one of the lengthwise directions of the molded surface fastener. It is preferable to be biased to the side. Moreover, it is preferable that the dimension in the width direction of the said magnetic wall part is 1 time or more and 6 times or less of the magnitude
- the molded surface fastener is attached to at least a part of the upper surface of the magnetic wall portion on the left side and the magnetic wall on the right side in a state where the molded surface fastener is attached to a molding die of a cushion body integrated with the molded surface fastener. It is preferable that at least a part of the upper surface of the part is formed so as to be in contact with a magnet mounted on the molding die.
- a die wheel that rotates in one direction and an extrusion that discharges the second synthetic resin containing the first synthetic resin and the magnetic particles at a certain ratio toward the die wheel in a molten state.
- a plurality of members disposed between the left and right outer wall portions, and a thin plate-like base portion, left and right outer wall portions erected along the length direction on the upper surface of the base portion.
- the die wheel is formed by stacking a plurality of ring-shaped laminated plates in the rotation axis direction, and the plurality of firsts having a certain radius as the laminated plates.
- a laminated plate and a plurality of second laminated plates having a constant radius larger than that of the first laminated plate using a pair of the second laminated plates for each second discharge port, A pair of the second laminated plates are disposed such that the second discharge port is disposed between the pair of the second laminated plates; and the first laminated plate and the second in the die wheel.
- the molded surface fastener Due to the difference in radius between the laminated plates, the molded surface fastener has concave grooves that are recessed on the upper surface of the base and are arranged on the left and right sides of each magnetic wall. It is preferred that involves form.
- the molded surface fastener according to the present invention is formed by melting and integrating a first synthetic resin substantially free of magnetic particles and a second synthetic resin containing magnetic particles at a certain ratio.
- the molded surface fastener includes a thin plate-shaped base, left and right outer wall portions erected along the length direction on the upper surface of the base portion, a plurality of engagement elements disposed between the left and right outer wall portions, and a width direction. It has left and right magnetic wall portions erected along the length direction at a position between the outer wall portion and the engaging element.
- At least the upper end portions of the left and right outer wall portions are formed only of the first synthetic resin that does not substantially contain magnetic particles. Further, at least the upper end portions of the left and right magnetic wall portions are formed only by the second synthetic resin containing magnetic particles at a certain ratio.
- the second synthetic resin is discharged (extruded) to a die wheel, which will be described later, in a melted state when the molded surface fastener is molded, and the molded surface fastener is joined to the outer peripheral surface portion of the die wheel together with the melted first synthetic resin. Mold.
- a portion containing magnetic particles and magnetic particles are combined.
- the boundary between the substantially synthetic resin-only portion is not clearly formed, and the first synthetic resin and the second synthetic resin are mixed indefinitely (indefinitely) to form a magnetic wall. Has been.
- the left and right magnetic wall portions prevent the invasion of the foamable resin during foam molding of the cushion body (or
- the left and right outer wall portions (which mainly prevent intrusion) are arranged at different positions (positions closer to the engaging elements) on the inner side in the width direction of the molded surface fastener.
- the left and right magnetic walls are filled with, for example, a molten second synthetic resin containing magnetic particles (that is, a molten second synthetic resin having a relatively low fluidity) in a cavity for molding the magnetic wall. It can be formed in a simple shape that facilitates the process.
- the molten second synthetic resin is discharged to the die wheel, thereby stably forming a cavity for molding the magnetic wall portion in the die wheel.
- the second synthetic resin can also be suppressed (or prevented) from leaking to other parts due to poor filling of the cavity. Therefore, in the molded surface fastener of the present invention, the left and right magnetic wall portions having a predetermined shape at least the upper end portion formed of the second synthetic resin and the leakage of the second synthetic resin are suppressed (or prevented), The left and right outer wall portions and the plurality of engaging elements having the shape and the appropriate strength can be stably provided.
- the molded surface fastener of the present invention is easily formed by filling the second synthetic resin containing magnetic particles in the magnetic wall molding cavity in the molding process. At least the upper end portion of can be stably formed only by the second synthetic resin. Thereby, for example, when using a mold provided with a magnet on the fastener mounting surface during foam molding of the cushion body, a stronger magnetic force is stably generated between the magnet of the mold and the magnetic particles contained in the molded surface fastener. Can be obtained.
- the molded surface fastener can be adsorbed to the fastener mounting surface of the mold with a stronger suction force and can be firmly fixed.
- the strong magnetic force generated between the magnet of the mold and the magnetic particles of the molded surface fastener corresponds to the position and orientation of the molded surface fastener to be attached to the position and orientation of the magnet disposed in the fastener holding part of the mold.
- a self-alignment effect that can be automatically and accurately adjusted can be obtained stably.
- the magnetic wall portion can be stably formed only by the second synthetic resin, and the first synthetic resin and the second synthetic resin can be prevented from being mixed at the upper end portion.
- the left and right magnetic wall portions are arranged on the inner side of the left and right outer wall portions to form the molded surface fastener, so that the interval between the left and right magnetic wall portions can be set, for example, by the molding surface of Patent Document 1 described above.
- the distance between the left and right resin intrusion prevention wall portions in the fastener can be easily reduced. For this reason, for example, even when a magnet having a small width dimension is used for a mold used for foam molding of a cushion body, both the left and right magnetic wall portions of the molded surface fastener are stably formed by the elongated magnet of the mold.
- the molded surface fastener can be stably attached to the fastener attachment surface of the mold without causing positional displacement. This also stabilizes the foamed resin material from entering the engaging region formed by the plurality of engaging elements due to the positional deviation of the molded surface fastener with respect to the fastener mounting surface of the mold. Can be prevented.
- the left and right magnetic wall portions are a mixture of the first synthetic resin substantially free of magnetic particles and the second synthetic resin containing magnetic particles in a certain ratio.
- a mixed region is formed between the upper end and the base of the magnetic wall.
- the adhesion between the portion of the second synthetic resin containing magnetic particles and the portion of the first synthetic resin substantially free of magnetic particles in the molded surface fastener can be greatly improved. For this reason, for example, in the molding process of a molded surface fastener, even when the molded surface fastener receives a large pulling force when the molded surface fastener is peeled off from the die wheel, the molded surface fastener is less likely to be cracked or split. As a result, production efficiency and yield of the molded surface fastener can be improved.
- the base portion of the molded surface fastener is recessed in the upper surface portion of the base portion, and is a recess disposed between each outer wall portion and each magnetic wall portion, and between the engaging element and each magnetic wall portion. Has a groove.
- the recessed groove portions provided on the left and right sides of the magnetic wall portion have a certain groove depth from the upper surface of the base portion, and are continuously recessed along the length direction. Therefore, it is possible to suppress or prevent the second synthetic resin containing magnetic particles from leaking from the magnetic wall portion to the outer wall portion, the engaging element, and the like over the entire length direction of the molded surface fastener. .
- the groove portions provided in each magnetic wall portion are an inner groove portion disposed closer to the engaging element than the magnetic wall portion, and an outer groove portion disposed closer to the outer wall portion than the magnetic wall portion.
- the width dimension (the dimension in the width direction) of the inner concave groove part and the width dimension of the outer concave groove part have different sizes.
- the second synthetic resin containing the magnetic particles leaks from the magnetic wall part to the outer outer wall part by making the outer groove part wider than the inner groove part. Can be prevented.
- the width dimension of the inner concave groove portion smaller than the width dimension of the outer concave groove portion, for example, when the molded surface fastener is cut with an appropriate length dimension, in the cut molded surface fastener, the length direction
- the foamed resin enters the engagement region from the end edge portion (front end edge portion and rear end edge portion) through the inner concave groove portion or a gap (space portion) formed on the inner concave groove portion. Can be suppressed or prevented.
- the height dimension (dimension in the height direction) of the magnetic wall portion is the same as the height dimension of the outer wall portion.
- the foamable resin is more difficult to exceed the outer wall portion and the magnetic wall portion of the molded surface fastener. It is possible to more effectively prevent the resin from entering the engagement area of the molded surface fastener.
- the magnetic wall portion has a plurality of magnetic wall bodies arranged intermittently at a predetermined pitch along the length direction.
- the flexibility of the molded surface fastener is greatly increased as compared with the case where the magnetic wall portion is formed of a continuous vertical wall portion continuously arranged with a certain height dimension along the length direction. Can do.
- each magnetic wall has the above-mentioned mixed region, and the mixed region of each magnetic wall is biased to one side in the length direction of the molded surface fastener (for example, the front side in the machine direction). It is arranged. Thereby, even if the molded surface fastener receives a pulling force from various directions, it is possible to make the magnetic wall body less likely to be cracked or split.
- the dimension in the width direction of the magnetic wall portion is 1 to 6 times the average particle size of the magnetic particles.
- the molded surface fastener can have appropriate flexibility.
- the molded surface fastener is attached to at least a part of the upper surface of the left magnetic wall portion and the upper surface of the right magnetic wall portion in a state where the molded surface fastener is attached to the molding die of the cushion body integrated with the molded surface fastener. At least a portion is formed so as to be in contact with a magnet mounted on a molding die.
- molding surface fastener of this invention can be stably fixed to the predetermined position of a shaping die with a magnetic force.
- a die wheel that rotates in one direction, a first synthetic resin that does not substantially contain magnetic particles toward the die wheel, and magnetic particles
- the first synthetic resin is discharged from the first discharge port of the extrusion nozzle using a molding apparatus having an extrusion nozzle that discharges the second synthetic resin contained in a certain ratio in a molten state, and the second of the extrusion nozzle
- a molded surface fastener is manufactured by discharging the second synthetic resin from the two discharge ports.
- At least the upper end portions of the left and right outer wall portions are formed only from the first synthetic resin substantially free of magnetic particles. Further, on the upper surface of the base portion, left and right magnetic wall portions arranged along the length direction at a position between the outer wall portion and the engaging element in the width direction are formed, and at least the upper end portions of these magnetic wall portions Is formed only by the second synthetic resin containing magnetic particles in a certain ratio.
- the left and right magnetic wall portions are different from the left and right outer wall portions, and the second synthetic resin is easily filled in the cavity of the magnetic wall portion provided in the die wheel.
- Such a simple shape can be formed. Accordingly, the magnetic wall portion can be stably formed in a predetermined shape, and the second synthetic resin can be suppressed (or prevented) from leaking to other portions due to poor filling of the cavity.
- leakage of the left and right magnetic wall portions having a predetermined shape formed at least at the upper end portion of the second synthetic resin and the second synthetic resin is suppressed (or prevented),
- a molded surface fastener as described above having left and right outer wall portions and a plurality of engaging elements having a predetermined shape and appropriate strength can be stably manufactured.
- the die wheel is formed by stacking a plurality of ring-shaped laminated plates in the rotation axis direction, and a plurality of second plates having a certain radius are used as the laminated plates of the die wheel.
- One laminated plate and a plurality of second laminated plates having a constant radius larger than that of the first laminated plate are used.
- a pair of second laminated plates is used for each second discharge port, and the pair of second laminated plates is arranged between the second laminated plates with the second discharge port being set.
- the first synthetic resin is discharged from the first discharge port of the extrusion nozzle toward the die wheel having the first laminated plate and the second laminated plate
- the second synthetic resin is discharged from the second discharge port of the extrusion nozzle.
- a molded surface fastener provided with concave groove portions on the left and right sides of the magnetic wall portion while suppressing or preventing the second synthetic resin containing magnetic particles from leaking to the outer wall portion and the engaging element by discharging. It can be manufactured stably.
- FIG. 3 is a sectional view taken along line III-III shown in FIG. 2.
- FIG. 4 is a cross-sectional view taken along lines IV (a) -IV (a) to IV (e) -IV (e) in FIG.
- FIG. 15 is a cross-sectional view taken along line XV-XV illustrated in FIG. 14. It is a perspective view which shows the conventional molded surface fastener.
- 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 length dimension and width dimension of the molded surface fastener, the number of engaging elements arranged at the base of the molded surface fastener, the arrangement position, the formation density, etc. are not particularly limited. It is possible to change arbitrarily.
- FIG. 1 is a perspective view showing a molded surface fastener according to the first embodiment.
- FIG. 2 is a plan view of the molded surface fastener
- FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. 4 is a cross-sectional view taken along lines IV (a) -IV (a) to IV (e) -IV (e) in FIG.
- the front-rear direction of the molded surface fastener refers to the length direction (particularly the length direction of the base) of the molded surface fastener formed in a long shape as will be described later, and the molded surface fastener is molded. This is a direction along the machine direction (MD) in which the molded surface fastener is continuously molded in the step of performing.
- MD machine direction
- the left-right direction refers to a width direction that is orthogonal to the length direction and along the upper surface (or lower surface) of the base of the molded surface fastener.
- the left-right direction and the width direction can also be referred to as an orthogonal direction (CD) orthogonal to the machine direction (MD).
- the vertical direction (thickness direction) means 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, and in particular, the engaging element with respect to the base material portion.
- the direction of the side on which is formed is the upper side, and the direction on the opposite side is the lower side.
- the molded surface fastener 1 includes a thin plate-like base portion 11 elongated in the front-rear direction, left and right outer wall portions 20 erected on the left and right side edge portions of the base portion 11, and the left and right outer wall portions 20.
- a plurality of hook-shaped male engagement elements 13 arranged in the horizontal direction, a lateral wall part 15 arranged along the left-right direction, and arranged adjacent to the inside of the left and right outer wall parts 20 and containing magnetic particles It has left and right magnetic wall portions 30 and fin pieces 17 extending in the width direction from the left and right side edges of the base portion 11 toward the outside.
- the molded surface fastener 1 is manufactured using a molding apparatus 60 described later shown in FIG. 5 and is formed long in the machine direction (MD) along the conveyance path of the molding apparatus 60.
- the molded surface fastener 1 of Example 1 is formed by melting and integrating a first synthetic resin substantially free of magnetic particles and a second synthetic resin containing magnetic particles at a certain ratio.
- the materials of the first synthetic resin and the second synthetic resin are not particularly limited, but examples of the first synthetic resin include polyamide resin, polyester resin, polypropylene resin, PVC resin, ABS resin, polyethylene resin, or those resins.
- a thermoplastic resin such as a copolymer can be employed.
- the second synthetic resin is made of a thermoplastic resin such as a polyamide resin, a polyester resin, a polypropylene resin, a PVC resin, an ABS resin, a polyethylene resin, or a copolymer thereof, and a magnetic material made of an alloy such as iron, cobalt, or nickel.
- the particles are contained (mixed) at a certain ratio.
- magnetic particles are particles that generate magnetism when a magnetic field is applied, and the material of the magnetic particles is not particularly limited as long as it is a material that can be magnetically attracted to a magnet.
- the size of each particle size and average particle size of the magnetic particles can be arbitrarily changed.
- the portion containing the magnetic particles in the molded surface fastener 1 is represented by a gray color.
- the molded surface fastener 1 can be colored in a desired color (for example, green) by adding a pigment or the like to the synthetic resin.
- the part containing the magnetic particle of the molded surface fastener 1 expresses the black or gray color exhibited by the magnetic particle with respect to the color (for example, green) of the molded surface fastener 1. Therefore, in the case of Example 1, the first synthetic resin exhibits a green color, and the second synthetic resin exhibits a black or gray color.
- the base 11 of the molded surface fastener 1 is formed in a thin plate shape with a small thickness in the vertical direction.
- left and right outer wall portions 20 On the upper surface of the base portion 11, left and right outer wall portions 20, a plurality of engaging elements 13, left and right magnetic wall portions 30, and a plurality of horizontal wall portions 15 are erected, and on both left and right sides of each magnetic wall portion 30.
- the concave groove part 40 mentioned later is recessedly provided along the length direction.
- the lower surface of the base 11 is formed as a flat surface.
- a large bonding area between the molded surface fastener 1 and the cushion body is secured to increase the fixing strength.
- a plurality of grooves or ridges parallel to the length direction can be provided on the lower surface of the base 11.
- the left and right outer wall portions 20 in the first embodiment are provided along the front-rear direction at positions close to the side edges slightly inside from the left and right side end edges of the base 11.
- the positions of the left and right outer wall portions 20 in the width direction are within a predetermined range from the left edge and right edge of the base 11 (for example, from the left edge or right edge of the base 11). If it is within the range of 30% or less of the width dimension of the base portion 11, it can be changed arbitrarily.
- the left and right outer wall portions 20 are resins that prevent the foamed resin from entering the engaging region 14 where the plurality of engaging elements 13 are arranged from the outside in the width direction during foam molding of the cushion body. It is provided as an intrusion prevention wall.
- the outer wall portion 20 alone forms a resin intrusion prevention wall portion.
- the outer wall portion 20 of the first embodiment will be described in detail.
- the outer wall portion 20 of the first embodiment may be in other forms as long as the outer wall portion 20 alone can prevent the foam resin from entering from the width direction. It may be formed, and the structure of the outer wall portion 20 is not limited to the first embodiment.
- Each of the left and right outer wall portions 20 includes two rows of vertical wall rows 21 formed in parallel in the length direction, and a connecting wall portion 23 that connects between the vertical wall rows 21 described later of the two rows of vertical wall rows 21. And a reinforcing portion 24 provided on the outer wall surface side of the divided vertical wall portion 22 of the vertical wall row 21 (second vertical wall row 21b described later) arranged outside in the width direction.
- the left and right outer wall portions 20 are arranged as vertical wall rows 21 on the inner side near the engaging elements 13 in the width direction and on the outer side away from the engaging elements 13.
- the first vertical wall row 21a and the second vertical wall row 21b are arranged in a line along the length direction, and a plurality of divided vertical wall portions 22 arranged intermittently at a predetermined formation pitch. Respectively.
- the divided vertical wall portion 22 of the first vertical wall row 21a and the divided vertical wall portion 22 of the second vertical wall row 21b are formed in the same shape and the same size.
- a predetermined gap is provided between two divided vertical wall portions 22 arranged adjacent to each other in the length direction of each vertical wall row 21.
- the formation pitch of the divided vertical wall portions 22 arranged in each vertical wall row 21 is set to 1 ⁇ 2 the formation pitch of the engagement elements 13 in the length direction.
- the divided vertical wall portion 22 of the first vertical wall row 21a and the divided vertical wall portion 22 of the second vertical wall row 21b are arranged at a position 1 / of the formation pitch of the divided vertical wall portions 22 in the length direction.
- the divided vertical wall portions 22 in the first vertical wall row 21a and the second vertical wall row 21b are arranged in a zigzag shape as a whole. .
- Each divided vertical wall portion 22 of the first embodiment is formed in a square frustum shape that rises from the base 11, is elongated in the length direction, and gradually decreases in length in the front-rear direction. ing. For this reason, the division
- the height dimension in the vertical direction from the upper surface of the base portion 11 to the upper surface of the split vertical wall portion 22 in each divided vertical wall portion 22 is the same as the maximum height dimension from the upper surface of the base portion 11 in the engagement element 13.
- the height of the magnetic wall 30 is set to be the same as the height from the upper surface of the base 11 to the upper surface of the magnetic wall 30.
- each connecting wall portion 23 of Example 1 is provided along the left-right direction between the first vertical wall row 21a and the second vertical wall row 21b.
- each connecting wall portion 23 includes a front end portion (or a rear end portion) of the divided vertical wall portion 22 arranged in the first vertical wall row 21a and a divided vertical wall portion 22 arranged in the second vertical wall row 21b. Are connected to each other.
- each connection wall part 23 is set to the same size as each division
- the region outside the outer wall portion 20 and the engagement region 14 of the molded surface fastener 1 are. Can be separated by the left and right outer wall portions 20 to prevent the foamed resin of the cushion body from entering the engagement region 14 beyond the outer wall portion 20 from the outer region.
- the case where the height dimension of the connecting wall portion 23 and the height dimension of the divided vertical wall portion 22 are the same here includes a case where there is a slight error.
- the height dimension of the connecting wall portion 23 and the height dimension of the divided vertical wall portion 22 are substantially the same size, and the molded surface fastener 1 is brought into close contact with the fastener mounting surface 72 of the mold 70, Even in the case where a slight gap is formed between the fastener mounting surface 72 and the connecting wall portion 23 and the divided vertical wall portion 22 so that the foamed resin cannot pass through, the divided vertical wall portion 22 and the connecting wall are formed in the present invention.
- the part 23 shall have the same height dimension.
- the plurality of engaging elements 13 formed in the first embodiment are predetermined in the length direction and the width direction so as to obtain a predetermined coupling force (engaging force) with the skin material covered on the cushion body. It is erected with a formation pitch.
- the engaging elements 13 are arranged in a line at a predetermined formation pitch along the length direction, and the columns of the engaging elements 13 are arranged in four lines in the width direction. It is arranged.
- an area between the left and right magnetic wall portions 30 where the plurality of engaging elements 13 are arranged is defined as an engaging area 14.
- the arrangement pattern of the engaging elements 13 is not particularly limited.
- the engagement region 14 is formed by arranging a plurality of engagement elements 13 between the left and right magnetic walls 30 in a predetermined arrangement pattern such as a staggered pattern, or by randomly arranging the engagement elements 13. Also good.
- Each engagement element 13 of the first embodiment is formed to have the same shape as the engagement element described in Patent Document 1. That is, the engaging element 13 of the first embodiment has a rising portion 13a that rises vertically from the upper surface of the base portion 11, and a hook-like shape that extends while curving toward the front and rear in the length direction at the upper end of the rising portion 13a. And an engaging head 13b.
- the maximum value of the height dimension from the upper surface of the base portion 11 in each engagement element 13 is the height dimension from the upper surface of the base portion 11 in the divided vertical wall portion 22 and the base portion in the magnetic wall portion 30 as described above. 11 is set to the same size as the height from the top surface.
- the shape and dimensions of each engagement element 13 are not particularly limited and can be arbitrarily changed.
- the height dimension of the engaging element 13 from the upper surface of the base portion 11 can be set lower than that of the divided vertical wall portion 22.
- the horizontal wall portion 15 in the first embodiment is provided integrally with the engaging element 13 on both the left and right sides of each engaging element 13.
- the horizontal wall portion 15 of the first embodiment is provided between the first horizontal wall portion 15a provided between the engaging elements 13 adjacent to each other in the width direction and having a small width dimension (dimension in the width direction), and the magnetic wall portion 30. It has the 2nd horizontal wall part 15b which is provided in the wall part opposing side surface of the adjacent engaging element 13, and has a larger width dimension than the 1st horizontal wall part 15a.
- the first horizontal wall portion 15a is arranged along the width direction from each engagement element 13 toward the engagement element 13 adjacent in the width direction. Further, two first lateral wall portions 15a arranged adjacent to each other (that is, the first lateral wall portion 15a provided integrally with the engagement element 13 and the engagement element adjacent in the width direction of the engagement element 13).
- the first horizontal wall portion 15a provided integrally with the base plate 13 is connected at the lower end to each other via a connecting horizontal wall portion 15c protruding from the upper surface of the base 11, but is located above the connecting horizontal wall portion 15c. The regions are spaced apart from each other by a small distance.
- a connecting horizontal wall portion 15c that connects the two and the height of the upper end of the connecting horizontal wall portion 15c from the height position of the upper end of the first horizontal wall portion 15a.
- a slit (space part) formed along the height direction to the vertical position is provided.
- the second lateral wall portion 15b is provided along the width direction in a region in the width direction between the engaging element 13 adjacent to the magnetic wall portion 30 and the groove portion 40.
- a slit (space portion) having a width corresponding to the concave groove portion 40 is provided between the second lateral wall portion 15b and the magnetic wall portion 30, and the second lateral wall portion 15b and the magnetic wall portion 30 Are spaced apart from each other by a small distance.
- the height dimension from the upper surface of the base portion 11 in the lateral wall portion 15 (that is, the first lateral wall portion 15a and the second lateral wall portion 15b) is the same as the maximum height dimension from the upper surface of the base portion 11 in the engaging element 13. Moreover, it is set to the same size as the height dimension from the base 11 of the division
- each height dimension from the base portion 11 in the divided vertical wall portion 22, the connecting wall portion 23, the first horizontal wall portion 15a, and the second horizontal wall portion 15b, and the engagement element is set to the same size, and the upper surface or the upper end thereof is arranged on the same plane.
- the split vertical wall portion 22 and the connecting wall portion 23 of the molded surface fastener 1 are obtained by adsorbing and fixing the molded surface fastener 1 to the fastener holding portion 71 of the mold 70.
- the engaging element 13, the first lateral wall portion 15a, and the second lateral wall portion 15b can be stably brought into close contact with the cavity surface (fastener mounting surface 72) of the fastener holding portion 71 of the mold 70. Accordingly, the foamed resin can be prevented from entering the engagement region 14 from the width direction beyond the left and right outer wall portions 20 of the molded surface fastener 1 and in the length direction beyond the lateral wall portion 15 and the engagement element 13. Can also be prevented from entering the engagement region 14 from the outside.
- slits are provided between the two first lateral wall portions 15a arranged adjacent to each other, and between the second lateral wall portion 15b and the magnetic wall portion 30, respectively.
- the foamed resin of the cushion body has a slit (gap) between the first horizontal wall portion 15a and a slit (gap between the second horizontal wall portion 15b and the magnetic wall portion 30). ) Through the engagement region 14 is extremely small.
- the left and right magnetic wall portions 30 in the first embodiment are arranged at positions between the outer wall portion 20 and the engagement region 14 in the width direction, and are linearly provided along the length direction. Yes. Moreover, each magnetic wall part 30 has the some magnetic wall body 31 distribute
- the plurality of magnetic wall bodies 31 in each magnetic wall portion 30 are intermittently arranged with a predetermined formation pitch.
- a predetermined gap is provided between two magnetic wall bodies 31 arranged adjacent to each other in the length direction, and the formation pitch of the magnetic wall bodies 31 in the length direction is the length of the engagement element 13. It is set to the same size as the formation pitch in the direction.
- the magnetic wall bodies 31 are intermittently arranged at a constant formation pitch, for example, when the magnetic wall portion 30 is continuously provided at a constant height along the length direction.
- the molded surface fastener 1 can be easily bent in the vertical direction (easily bent). For this reason, the moderate softness
- Each magnetic wall 31 has a flat upper surface (top end surface) arranged orthogonal to the height direction. Further, the magnetic wall 31 is formed in a substantially trapezoidal shape such that when the magnetic wall 30 is viewed from the left and right sides, the length dimension in the front-rear direction gradually decreases upward.
- the magnetic wall 31 is formed with a certain width dimension.
- the width dimension of the magnetic wall body 31 is set larger than the width dimension of the divided vertical wall portion 22 in the first vertical wall row 21a and the second vertical wall row 21b.
- the width of the magnetic wall 31 is preferably set to be equal to or larger than the average particle size of the magnetic particles contained in the magnetic wall 31, for example, 1 to 6 times the average particle size. It may be set. In the case of the first embodiment, the width dimension of the magnetic wall body 31 is set to 0.6 mm.
- the magnetic wall 31 has the above-described width dimension, when forming the molded surface fastener 1 using the die wheel 61 as will be described later, the magnetic particles are placed in the cavity for forming the magnetic wall 31.
- the molten second synthetic resin contained can be easily filled. Therefore, each magnetic wall body 31 can be stably formed in a predetermined shape, and the magnetic particles can be made difficult to leak into the outer wall portion 20, the lateral wall portion 15, and the engaging element 13.
- the width dimension of the magnetic wall 31 is the width from the position of the inner wall surface of the divided vertical wall portion 22 in the first vertical wall row 21a to the position of the outer wall surface of the divided vertical wall portion 22 in the second vertical wall row 21b. It is set smaller than the dimensions. Thereby, it can suppress that the softness
- the distance between the left and right outer wall portions 20 is prevented from becoming too large, and both the left and right outer wall portions 20 are stably attached to the fastener mounting surface 72 of the fastener holding portion 71 of the mold 70 when foaming the cushion body. It can be adhered.
- the height dimension in the vertical direction from the upper surface of the base 11 to the upper surface of the magnetic wall 31 in each magnetic wall 31 is the height of the divided vertical wall 22 in the first vertical wall row 21a and the second vertical wall row 21b.
- the size is set to the same size.
- the magnetic wall body 31 has the same height dimension as the division
- each magnetic wall body 31 of the magnetic wall portion 30 in Example 1 contains magnetic particles.
- at least the upper end portion of the magnetic wall body 31 is formed of only the second synthetic resin, and the magnetic wall portion 30 has a constant concentration of magnetic particles in the range of 30 wt% to 80 wt%. Contained. Note that, in FIG. 4, in order to easily show a portion formed only by the second synthetic resin of the magnetic wall body 31 (a portion where the content concentration of the magnetic particles is constant) and a portion of the mixed region 35 to be described later, The approximate position of the boundary portion 37 is represented by a broken line.
- the content concentration of the magnetic particles in the upper end portion of the magnetic wall body 31 (that is, the content concentration of the magnetic particles in the second synthetic resin) is 30 wt% or more, particularly 40 wt% or more, the fastener of the mold 70 will be described later.
- a large attractive force due to the magnetic force can be stably generated between the magnet 73 embedded in the holding portion 71 and the magnetic particles contained in the magnetic wall portion 30 of the molded surface fastener 1.
- the content concentration of the magnetic particles in the upper end portion of the magnetic wall body 31 is 80 wt% or less, preferably 70 wt% or less, each magnetic wall body 31 can stably secure an appropriate strength.
- the magnetic particle is contained in the magnetic wall part 30, the connection part which the magnetic wall 31 connects in the base part 11, and its vicinity, the left and right outer wall part in the molded surface fastener 1 20, the engaging element 13 and the lateral wall 15 are substantially free of magnetic particles.
- the upper end portions of the left and right outer wall portions 20 are formed of only the first synthetic resin that is substantially free of magnetic particles.
- the portion of the left and right outer wall portions 20 excluding the upper end portion, the engaging element 13 and the lateral wall portion 15 contain magnetic particles in a smaller proportion than the upper end portion of the magnetic wall body 31. However, it is preferable that it is not substantially contained.
- the outer wall portion 20 of the die wheel 61 that is continuous in a zigzag shape is formed in the cavity. It may be difficult to fill the first synthetic resin, and the outer wall portion 20 may not be molded into a predetermined shape.
- the left and right outer wall portions 20 and the engaging element 13 in the molded surface fastener 1 are entirely formed of the first synthetic resin that does not substantially contain magnetic particles.
- the phrase “substantially free of magnetic particles” is not limited to the case where the portion is formed of only a synthetic resin containing no magnetic particles, and the magnetic particles are contained in an amount of 10 wt% or less, preferably 5 wt%. It also includes the case where it is formed with a synthetic resin contained in an amount of not more than This is because the molded surface fastener of the present invention may be manufactured by reusing the product in order to reduce the environmental load.
- a molded surface fastener is molded by finely cutting a finished molded surface fastener partly containing a magnetic material (magnetic particles) once and reusing it as pellets for extruded resin that does not actively contain magnetic material.
- the synthetic resin that is the main material of the molded surface fastener may contain some magnetic material, the present invention also includes a molded surface fastener manufactured with such a recycled material.
- the “part containing the magnetic material” in the present specification means that the ratio of the synthetic resin containing the magnetic material (magnetic particles) is 30 wt% or more and 80 wt% or less (preferably 40 wt% or more and 70 wt% or less).
- the “part where the magnetic material is not substantially contained” refers to the “part where the ratio of the magnetic material contained in the synthetic resin is 10 wt% or less (preferably 5 wt% or less)”.
- the first synthetic resin contains no magnetic particles (magnetic material), and the content concentration of the magnetic particles in the first synthetic resin is 0 wt%.
- the second synthetic resin contains magnetic particles at a concentration (ratio) of 50 wt%. Therefore, magnetic particles are contained in the upper end portion of the magnetic wall body 31 in Example 1 at a constant rate of 50 wt%.
- the content concentration of the magnetic particles in the second synthetic resin can be set to an arbitrary size in the range of 30 wt% to 80 wt%.
- the upper end portion containing the magnetic particles in a certain high ratio may be provided only in a very small region that is difficult to visually recognize, or, for example, the magnetic wall portion 30 may be provided in a region below the upper end of the magnetic wall 30 within a range of 50% or more of the height dimension from the base 11 and further 80% or more.
- a region between the upper end portion of the magnetic wall body 31 and the base portion 11 includes a first synthetic resin substantially free of magnetic material and a magnetic material.
- a mixed region 35 formed by mixing with the second synthetic resin contained at a certain ratio is formed, and the boundary between the first synthetic resin and the second synthetic resin in each magnetic wall 31 is It is not clearly formed so as to be discernable, but is formed in an ambiguous (unclear) state.
- each magnetic wall 31 is formed such that the ratio of the second synthetic resin gradually decreases from the upper end portion of the magnetic wall 31 toward the base 11 and the ratio of the first synthetic resin gradually increases. . Therefore, the content concentration of the magnetic material in the magnetic wall body 31 gradually decreases from the upper end portion of the magnetic wall body 31 toward the base portion 11 (downward).
- the mixed region 35 of each magnetic wall body 31 has a length direction of the magnetic wall body 31, for example, as schematically shown in FIG. 4 when a cross section perpendicular to the width direction of the magnetic wall body 31 is viewed.
- the area of the mixed region 35 is not provided symmetrically with respect to the center line 38 in FIG. 1 and is on one side in the length direction of the molded surface fastener 1, specifically on the front side in the machine direction (MD). Is provided so as to be large.
- the first synthetic resin and the second synthetic resin mixed region 35 is formed in each magnetic wall body 31, thereby improving the adhesion between the first synthetic resin and the second synthetic resin in each magnetic wall body 31. It can be greatly improved.
- the magnetic wall portion 30 may be formed so that the boundary portion between the first synthetic resin and the second synthetic resin can be discriminated without forming the mixed region 35 of the first synthetic resin and the second synthetic resin.
- the magnetic wall portion 30 since the mixed region 35 as described above is provided in the magnetic wall portion 30, for example, compared to a case where the entire magnetic wall portion 30 is formed of only the second synthetic resin, the magnetic wall portion 30 has The amount of magnetic particles used can be reduced. As a result, the manufacturing cost can be reduced, and the decrease in flexibility of the synthetic resin due to the inclusion of the magnetic particles can be suppressed.
- a pair of left and right groove portions 40 that are recessed in the upper surface portion of the base portion 11 are disposed adjacent to the magnetic wall portion 30 on both left and right sides of each magnetic wall portion 30. ing. That is, the inner concave groove portion 41 is provided between the left end of the engagement region 14 and the left magnetic wall portion 30, and the outer concave groove portion 42 is provided between the left outer wall portion 20 and the left magnetic wall portion 30.
- the left magnetic wall portion 30 is provided with a pair of an inner groove portion 41 and an outer groove portion 42 so as to sandwich the magnetic wall portion 30.
- an inner concave groove portion 41 is provided between the right end of the engagement region 14 and the right magnetic wall portion 30, and an outer concave groove portion 42 is provided between the right outer wall portion 20 and the right magnetic wall portion 30.
- the right magnetic wall portion 30 is also provided with a pair of an inner groove portion 41 and an outer groove portion 42 so as to sandwich the magnetic wall portion 30.
- the concave groove portion 40 provided corresponding to each magnetic wall portion 30 is formed linearly and continuously along the length direction directly beside the magnetic wall portion 30.
- the left and right concave groove portions 40 (the inner concave groove portion 41 and the outer concave groove portion 42) are closer to the inner wall surface and the outer wall surface of the magnetic wall body 31 in the magnetic wall portion 30 and the magnetic wall portion 30 in the left and right concave groove portions 40.
- the side wall surface is provided so as to form the same plane.
- the height dimension (hereinafter referred to as a groove depth dimension) from the upper surface of the base 11 to the groove bottom part of each concave groove part 40 in each concave groove part 40 has a constant size over the entire length direction.
- a pair of left and right groove portions 40 (inner groove portion 41 and outer groove portion 42) provided on the left magnetic wall portion 30, and a pair of left and right groove portions 40 provided on the right magnetic wall portion 30.
- the (inner concave groove portion 41 and outer concave groove portion 42) all have the same groove depth dimension.
- the groove depth dimension of each concave groove part 40 is 30% or more and 70% or less, preferably 40% or more and 60% or less of the dimension (namely, thickness dimension) in the height direction from the upper surface to the lower surface of the base 11.
- the groove depth dimension of the recessed groove part 40 in the first embodiment is set to 50% of the thickness dimension of the base part 11.
- the thickness dimension of the base 11 is 0.30 mm
- the groove depth dimension of the recessed groove 40 is 0.15 mm.
- the portion of the base portion 11 where the concave groove portion 40 is provided By setting the groove depth dimension of the concave groove portion 40 to 30% or more (preferably 40% or more) of the thickness dimension of the base portion 11 as described above, the portion of the base portion 11 where the concave groove portion 40 is provided.
- the thickness can be made thinner than other parts.
- the outer wall portion 20, the lateral wall portion 15, and the engaging element 13 can be formed only from the first synthetic resin.
- the groove depth dimension of the concave groove part 40 to 70% or less (preferably 60% or less) of the thickness dimension of the base part 11, even if the concave groove part 40 is provided, the strength of the base part 11 is appropriately secured. it can.
- the thickness dimension of the portion of the base portion 11 where the concave groove portion 40 is provided is the second synthesis. It is preferably set to 50% or more and 150% or less of the average particle size of the magnetic particles contained in the resin. By setting the thickness dimension of the base portion 11 where the concave groove portion 40 is provided to 50% or more of the average particle diameter of the magnetic particles, the strength of the base portion 11 can be appropriately ensured.
- the thickness dimension of the base portion 11 where the concave groove portion 40 is provided be 150% or less of the average particle diameter of the magnetic particles, it is contained in the second synthetic resin when the molded surface fastener 1 is molded.
- the magnetic particles extending from the magnetic wall portion 30 beyond the thin portion of the base portion 11 where the concave groove portion 40 is formed, the outer region where the outer wall portion 20 is disposed, the lateral wall portion 15 and the engaging element 13 are disposed. It is possible to effectively suppress (or prevent) leakage to the inner region.
- the pair of inner concave groove portions 41 and outer concave groove portions 42 arranged corresponding to the respective magnetic wall portions 30 have dimensions in the width direction of the concave groove portions 40 (hereinafter referred to as groove width dimensions). They are provided differently.
- the outer concave groove portion 42 arranged at the outer position near the outer wall portion 20 with respect to the magnetic wall portion 30 is at the inner position closer to the engaging element 13 with respect to the magnetic wall portion 30. It is provided with a width dimension larger than that of the arranged inner groove 41.
- the outer concave groove portion 42 is formed with a width dimension larger than that of the inner concave groove portion 41, so that the magnetic particles contained in the second synthetic resin are magnetic wall portions when the molded surface fastener 1 is molded.
- the possibility of leaking from the magnetic wall portion 30 to the outer region where the outer wall portion 20 is disposed is made smaller than the possibility of leaking from the magnetic wall portion 30 to the inner region where the lateral wall portion 15 and the engaging element 13 are disposed. it can.
- the inner concave groove portion 41 is formed with a width dimension smaller than that of the outer concave groove portion 42, the foamed resin is provided between the magnetic wall portion 30 and the lateral wall portion 15 during foam molding of the cushion body. Intrusion through the slit can be effectively prevented.
- the left and right fin pieces 17 in the first embodiment are extended in a tongue shape outward from the left and right edges of the base 11, and the left fin piece 17 and the right fin piece 17 Are alternately arranged with a predetermined formation pitch in the length direction.
- These left and right fin pieces 17 are portions embedded in the cushion body when the cushion body is foam-molded, and are provided to increase the fixing strength of the molded surface fastener 1 to the cushion body. Yes.
- the fin piece portion 17 may be provided with a protrusion in order to further increase the fixing strength to the cushion body.
- the molded surface fastener 1 according to the first embodiment having the above-described configuration is manufactured using, for example, the molding apparatus 60 shown in FIGS.
- the molding apparatus 60 according to the first embodiment includes a die wheel 61 that is driven and rotated in one direction (counterclockwise direction in the drawing), a first synthetic resin that is disposed opposite to the peripheral surface of the die wheel 61, and the first synthetic resin. It has the extrusion nozzle 66 which discharges 2 synthetic resin separately separately, respectively, and the pick-up roller 67 distribute
- the die wheel 61 of the molding device 60 includes a plurality of laminated plates 62 having a required thickness and a circular or donut shape having a circular opening at the center. And a rotating shaft 63 that is inserted into the central opening of the plurality of laminated plates 62 and fixes the laminated plates 62.
- the die wheel 61 is formed in a cylindrical shape by fixing a plurality of laminated plates 62 to the rotating shaft portion 63 in a state where the laminated plates 62 are sequentially stacked in the rotating shaft direction of the die wheel 61 and stacked. Moreover, in order to shape
- the forming cavity is omitted by using a conventionally known technique such as electric discharge machining, laser machining, or etching.
- the laminated plate 62 forming the die wheel 61 of the first embodiment has a constant size in the radial direction (that is, the length of the radius) from the rotation center to the outer peripheral surface.
- the plurality of first laminated plates 62a are formed so that the dimension in the rotation axis direction (in other words, the thickness dimension of the first laminated plate 62a) has the same size.
- Each of the first laminated plates 62a may be formed to have a required thickness dimension depending on the position where the first laminated plate 62a is laminated.
- the second laminated plate 62b of the die wheel 61 has a radius larger than that of the first laminated plate 62a by the size of the groove depth dimension of the concave groove portion 40 formed on the left and right sides of the magnetic wall portion 30 in the molded surface fastener 1.
- the second laminated plate 62b is a set of two at a position corresponding to a portion of the die wheel 61 where the pair of concave groove portions 40 (that is, the inner concave groove portion 41 and the outer concave groove portion 42) of the molded surface fastener 1 are formed.
- two sets of second laminated plates 62b that is, four second laminated plates 62b are used.
- one pair of the second laminated plates 62b is provided with a thickness dimension (dimension in the rotation axis direction) corresponding to the width dimension of the magnetic wall portion 30 between the second laminated plates 62b.
- the first laminated plates 62a are stacked so as to sandwich the first laminated plate 62a.
- the pair of second laminated plates 62b are overlapped so that a later-described second discharge port 66e of the extrusion nozzle 66 is disposed at a position between the second laminated plates 62b.
- the second synthetic resin containing magnetic particles is formed by laminating the pair of second laminated plates 62b and one first laminated plate 62a as described above to form the die wheel 61.
- the molded surface fastener 1 in which the recessed groove portions 40 are provided on both the left and right sides of the magnetic wall portion 30 can be molded while suppressing or preventing leakage to the outer wall portion 20, the lateral wall portion 15, and the engaging element 13. .
- a cooling liquid is circulated inside the die wheel 61 although illustration is omitted. It is made possible.
- a cooling liquid tank (not shown) is arranged at the lower part of the die wheel 61 so that the lower half of the die wheel 61 is immersed.
- the extrusion nozzle 66 includes a first flow channel 66a for circulating the first synthetic resin substantially free of magnetic particles and a second synthetic resin containing magnetic particles at a constant concentration.
- a second flow path 66b is formed to flow in a melted state.
- a second discharge port 66e is provided on the discharge surface 66c of the extrusion nozzle 66.
- the three first discharge ports 66d communicate with the first flow channel 66a of the extrusion nozzle 66
- the two second discharge ports 66e communicate with the second flow channel 66b of the extrusion nozzle 66.
- the two second discharge ports 66e correspond to the position where the magnetic wall portion 30 of the molded surface fastener 1 is formed, and are located above the three first discharge ports 66d and in the center first discharge port 66d. And a circular shape at a position between the left and right first discharge ports 66d.
- the position, shape, size, and the like of the first discharge port 66d and the second discharge port 66e can be arbitrarily changed according to the size, form, and the like of the molded surface fastener 1 to be molded. .
- the pickup roller 67 includes a pair of upper and lower clamping rollers 67a and 67b that clamp the molded surface fastener 1 molded along the outer peripheral surface of the die wheel 61 from above and below.
- the upper clamping roller 67a and the lower clamping roller 67b of the pickup roller 67 are arranged to face each other with a predetermined gap.
- the upper clamping roller 67a and the lower clamping roller 67b rotate in a predetermined direction at a predetermined speed, respectively, so that the molded surface fastener 1 molded on the outer peripheral surface portion of the die wheel 61 is continuously removed from the die wheel 61.
- the molded surface fastener 1 thus peeled off can be transferred to the downstream side while being sandwiched between the upper clamping roller 67a and the lower clamping roller 67b.
- the melted first synthetic resin is supplied to the die wheel 61 from the three first discharge ports 66 d of the extrusion nozzle 66. While continuously injecting toward the outer peripheral surface, the molten second synthetic resin is continuously injected toward the outer peripheral surface of the die wheel 61 from the two second discharge ports 66e.
- the die wheel 61 uses a plurality of first laminated plates 62a and four second laminated plates 62b, and as shown in FIG. 8, an extrusion nozzle between two pairs of second laminated plates 62b.
- 66 second discharge ports 66e are arranged. Therefore, by discharging the melted second synthetic resin from the second discharge port 66e, the discharged second synthetic resin is accommodated between the pair of second laminated plates 62b in the die wheel 61, thereby The second synthetic resin is inhibited (or prevented) from leaking beyond the pair of second laminated plates 62b to the area outside the second laminated plate 62b and the area inside the second laminated plate 62b. can do.
- the second laminated plate 62b of the die wheel 61 is formed with a larger radius than the first laminated plate 62a.
- the concave groove portions 40 (the inner concave groove portion 41 and the outer concave groove portion 42) are formed on the left and right sides of each magnetic wall portion 30 in the molded surface fastener 1 by the two sets of second laminated plates 62b disposed on the die wheel 61. 11, the thickness of the base 11 in the portion where the concave groove 40 is provided can be reduced.
- the groove depth dimension of the recessed groove portion 40 formed at this time corresponds to the difference in radius between the first laminated plate 62a and the second laminated plate 62b in the die wheel 61.
- the base 11 of the molded surface fastener 1 is mainly molded by the first synthetic resin between the extrusion nozzle 66 and the die wheel 61 of the molding device 60. Further, due to the cavities formed in the die wheel 61, at least the upper end portion of the outer wall portion 20 of the molded surface fastener 1 is formed of only the first synthetic resin, and at least the upper end portion of the magnetic wall portion 30 is the second synthetic resin. Formed only by.
- the outer wall portion 20, the engaging element 13, and the lateral wall portion 15 of the molded surface fastener 1 are integrally formed on the base portion 11 mainly by the first synthetic resin.
- the magnetic wall portion 30 of the molded surface fastener 1 is formed only at the upper end portion of the second synthetic resin, and the region between the upper end portion of the magnetic wall portion 30 and the base portion 11 in the magnetic wall portion 30 is:
- the first synthetic resin and the second synthetic resin are mixed together in a molten state and integrated to form the mixed region 35.
- the molded surface fastener 1 as shown in FIG. 1 is continuously molded on the outer peripheral surface of the die wheel 61 along the machine direction.
- the molded surface fastener 1 formed and cooled on the outer peripheral surface of the die wheel 61 is continuously peeled off from the die wheel 61 by the pickup roller 67. Further, the molded surface fastener 1 peeled off from the die wheel 61 is introduced between the upper clamping roller 67a and the lower clamping roller 67b of the pickup roller 67 and transferred toward the downstream side.
- the outer surface of the magnetic wall part 30 when peeled off from the die wheel 61 is a rough surface. It is easy to form on a surface having a relatively large roughness.
- the molding surface fastener 1 is passed between the upper clamping roller 67a and the lower clamping roller 67b so that the upper surface of the magnetic wall portion 30 is covered by the outer circumferential surface of the upper clamping roller 67a.
- the surface roughness on the top surface of the magnetic wall portion 30 can be made smaller than the surface roughness of the inner wall surface and the outer wall surface orthogonal to the width direction of the magnetic wall portion 30, for example.
- the upper surface of the magnetic wall part 30 has gloss more than the inner wall surface and outer wall surface orthogonal to the width direction of the said magnetic wall part 30, for example.
- the molded surface fastener 1 that has passed through the pickup roller 67 is conveyed toward, for example, a cutting unit (not shown), and is cut and collected at a predetermined length at the cutting unit, or the molded surface fastener 1 is long. In this state, it is wound up and collected in a roll on a collecting roller or the like.
- the molding apparatus and the manufacturing method used for manufacturing the molded surface fastener 1 are not limited to the molding apparatus 60 and the manufacturing method described in the first embodiment, and can be arbitrarily changed.
- the molded surface fastener 1 is molded by continuously extruding the molten first synthetic resin and second synthetic resin from the extrusion nozzle 66 toward the outer peripheral surface of one rotating die wheel 61.
- a pair of upper and lower forming rollers formed by using the die wheel 61 of Example 1 described above at least on one side is used to melt from the extrusion nozzle 66 toward the pair of upper and lower forming rollers.
- the molded surface fastener 1 can be molded by continuously extruding the first synthetic resin and the second synthetic resin.
- the left and right magnetic wall portions 30 containing magnetic particles are formed separately from the left and right outer wall portions 20.
- the shape of the magnetic wall portion 30 a simple shape that can easily fill the cavity with the second synthetic resin having a relatively low fluidity when melted can be employed.
- the left and right magnetic wall portions 30 can be stably formed into a predetermined shape using the die wheel 61.
- the second synthetic resin magnetic particles
- the lateral wall portion 15 can be stably formed so as to have a predetermined shape and to have appropriate strength.
- the upper end portions of the left and right magnetic wall portions 30 are formed only from the second synthetic resin. Further, the upper surface of the magnetic wall 30 is flattened by the upper clamping roller 67a of the pickup roller 67 as described above, and the surface roughness of the upper surface of the magnetic wall 30 is reduced. Accordingly, when performing image inspection on the molded surface fastener 1, the upper surface of the magnetic wall 30 can be clearly reflected and observed, so that the magnetic particle content in the magnetic wall 30 can be easily and stably maintained. Can be examined.
- the molded surface fastener 1 is flattened. It can be stably held on the cavity surface, and the holding state of the molded surface fastener 1 can be stably maintained.
- the magnetic wall portion 30 is formed with a mixed region 35 formed by mixing the first synthetic resin and the second synthetic resin, thereby improving the adhesion between the first synthetic resin and the second synthetic resin. Yes. Thereby, the strength of the magnetic wall portion 30 is increased, and it is possible to make it difficult for the magnetic wall portion 30 to be cracked or split.
- the molded surface fastener 1 of the first embodiment manufactured as described above is suitably used for a cushion body (foam) (not shown) such as a seat for a car seat.
- the molded surface fastener 1 is integrated so that the plurality of engagement elements 13 are exposed on the surface of the cushion body when foam molding of the cushion body is performed.
- the long molded surface fastener 1 is cut to a required length, and the cut molded surface fastener 1 is shown in FIG. As described above, it is placed on the fastener mounting surface (cavity surface) 72 of the fastener holding portion 71 provided in the mold 70 of the cushion body.
- a magnet 73 such as a neodymium magnet is mounted on the fastener mounting surface 72 of the mold 70 corresponding to the position where the molded surface fastener 1 is placed.
- a narrow magnet 73 having a reduced size in the width direction of the molded surface fastener 1 is attached to the mold 70 of the first embodiment.
- the left and right magnetic wall portions 30 are arranged on the inner side of the left and right outer wall portions 20, and the interval between the left and right magnetic wall portions 30 is narrow.
- the distance D1 in the width direction from the inner wall surface of the left magnetic wall portion 30 to the inner wall surface of the right magnetic wall portion 30 is smaller than the width dimension W of the magnet 73 provided in the mold 70.
- the left and right magnetic wall portions 30 can be magnetically attracted simultaneously by one magnet 73, thereby causing the molded surface fastener 1 to be prevented from being displaced on the fastener mounting surface 72 of the mold 70. Can be fixed stably.
- the distance D ⁇ b> 2 between the outer wall surfaces of the left and right magnetic wall portions 30 is set to the same size as the width dimension W of the magnet 73.
- the distance D1 between the inner wall surfaces of the left and right magnetic wall portions 30 is set to a size smaller than the width dimension W of the magnet 73, and at least a part of the upper surface of the left and right magnetic wall portions 30 is set. If it is possible to contact the magnet 73, the distance D ⁇ b> 2 can be made larger than the width dimension W of the magnet 73.
- the upper end portions of the left and right magnetic wall portions 30 are formed only by the second synthetic resin containing magnetic particles, and the magnetic particles are constant and high at the upper end portions of the magnetic wall portions 30. Dispersed by concentration. For this reason, the molded surface fastener 1 can be attracted more strongly by the magnet 73 of the mold 70, and the molded surface fastener 1 can be firmly and stably fixed to the fastener mounting surface 72 of the fastener holding portion 71. In addition, by using a strong magnetic force between the magnetic particles of the molded surface fastener 1 and the magnet 73 of the mold 70, the position and orientation of the molded surface fastener 1 with respect to the fastener holding portion 71 of the mold 70 can be changed. It is also possible to automatically and accurately adjust the position and orientation.
- the magnetic wall body 31 of the magnetic wall portion 30 is intermittently disposed along the length direction, so that the molded surface fastener 1 has an appropriate flexibility as described above.
- the molded surface fastener 1 can be easily bent in the vertical direction. For this reason, even when the fastener mounting surface 72 in the fastener holding portion 71 of the mold 70 is formed in a curved surface shape, for example, along the length direction of the molded surface fastener 1, the molded surface fastener 1 can be It can be appropriately curved along the curved shape of the cavity surface of 70 and attached to the cavity surface without creating a large gap between them.
- the molded surface fastener 1 has the entire upper surface of the left and right outer wall portions 20, the upper surface of the lateral wall portion 15, and the upper end portion of the engaging element 13 in the length direction of the molded surface fastener 1. As a result, it can be stably held by the fastener holding portion 71 of the mold 70 in a state of being in close contact with the fastener mounting surface 72 of the mold 70.
- the foamed resin of the cushion body is injected into the cavity space of the mold 70.
- the foamed resin is foamed while flowing to the lower surface (rear surface) side of the base portion 11 of the molded surface fastener 1, the outer sides of the left and right outer wall portions 20, and the front and rear end edges of the molded surface fastener 1.
- the cushion body (foam) 75 is foam-molded over the entire cavity space.
- the molded surface fastener 1 is positioned and fixed at a predetermined position by the attracting action of the magnet 73 of the mold 70, the position of the molded surface fastener 1 is not moved by the flow of foamed resin and the foaming pressure.
- the left and right outer wall portions 20 are continuously formed in a meandering manner and are in close contact with the cavity surface of the mold 70. For this reason, the foamed resin flowing in the cavity space of the mold 70 is prevented from entering the engagement region 14 from the width direction beyond the left and right outer wall portions 20.
- the width is closest to the front end or the rear end of the molded surface fastener 1.
- a plurality of lateral wall portions 15 and a plurality of engaging elements 13 arranged along the direction are provided between the left and right magnetic wall portions 30 in close contact with the cavity surface of the mold 70. Further, the magnetic wall portion 30 and the outer wall portion 20 are arranged close to each other.
- the foamed resin that flows along the length direction can enter from the front end edge and the rear end edge of the molded surface fastener 1 to the position where the lateral wall portion 15 and the engaging element 13 are initially disposed, Intrusion into the engagement region 14 beyond the lateral wall 15 and the engagement element 13 is prevented. That is, in the molded surface fastener 1 of the first embodiment, since the foamed resin of the cushion body 75 can be prevented from entering the engagement region 14 from the width direction and the length direction of the molded surface fastener 1, the engagement element 13 is It is possible to stably prevent the cushion body 75 from being embedded by the foamed resin.
- the cushion body 75 in which the molded surface fastener 1 is fixed to a required portion is manufactured.
- the cushion body 75 obtained in this manner can stably secure the engagement force that the engagement element 13 originally has because the foam does not enter the engagement area 14 of the molded surface fastener 1.
- the surface of the obtained cushion body 75 is covered with a skin material, and the loop-like engagement element provided on the back surface of the skin material can be easily engaged with the hook-like engagement element 13 of the molded surface fastener 1. it can. Accordingly, the skin material can be attached accurately along the curved surface of the cushion body 75 without being lifted from the cushion body 75.
- the molded surface fastener 1 of Example 1 is excellent in flexibility in the vertical direction. For this reason, for example, when the skin material is pulled away from the molded surface fastener 1, the molded surface fastener 1 is pulled together with the cushion body 75 while being engaged with the loop-like engagement element of the skin material. The loop-like engagement element of the skin material is not easily detached from the hook-like engagement element 13 of the molded surface fastener 1. For this reason, as a result, the engagement strength of the skin material with respect to the loop-shaped engagement element in the molded surface fastener 1 is increased.
- the magnetic wall body 31 of the magnetic wall portion 30 is intermittently arranged at a predetermined formation pitch along the length direction as described above, and the length of the magnetic wall body 31 is The formation pitch in the direction is set to the same size as the formation pitch in the length direction of the engagement element 13 (see FIG. 4).
- the length dimension of each magnetic wall body, the interval between the magnetic wall bodies, the formation pitch in the length direction of the magnetic wall bodies, and the like can be arbitrarily changed.
- the length of each magnetic wall 31a in the magnetic wall 30a is made smaller than that in the first embodiment, and the magnetic wall The formation pitch in the length direction of 31a may be smaller than that in the first embodiment.
- the molded surface fastener 1a according to the modification shown in FIG. 10 is formed by making the form of the magnetic wall portion 30a different from the molded surface fastener 1 of the first embodiment, the portions other than the magnetic wall portion 30a. Is formed in substantially the same manner as the molded surface fastener 1 of the first embodiment. Therefore, in this modified example and in Example 2 and Example 3 to be described later, the same reference numerals are used for parts or members having substantially the same shape and dimensions as the molded surface fastener 1 according to Example 1 described above. The description thereof will be omitted.
- the magnetic wall portion 30a is provided along the length direction at a position between the outer wall portion 20 and the engagement region 14 in the width direction.
- Each magnetic wall portion 30a has a plurality of magnetic wall bodies 31a arranged in a line along the length direction.
- the plurality of magnetic wall bodies 31a in each magnetic wall portion 30a are intermittently arranged with a predetermined formation pitch, and a predetermined gap is provided between two magnetic wall bodies 31a arranged adjacent to each other in the length direction. The gap is provided.
- each magnetic wall body 31a in this modification is set to be smaller than half the length dimension of the magnetic wall body 31 in the first embodiment.
- the formation pitch in the length direction of the magnetic wall 31a is set to the size of a half of the formation pitch in the length direction of the engagement element 13.
- the width dimension in each magnetic wall body 31a and the height dimension from the upper surface of the base part 11 are set to the same magnitude
- each magnetic wall 31a in this modification contains magnetic particles as in the magnetic wall 31 of the first embodiment. That is, at least the upper end portion of the magnetic wall body 31a is formed only from the second synthetic resin, and the upper end portion of the magnetic wall portion 30a contains magnetic particles at a concentration of 50 wt%.
- the molded surface fastener 1a of this modified example is a molded surface fastener 1a as compared with the molded surface fastener 1 of Example 1 described above. Can be further easily bent in the vertical direction, so that the flexibility of the molded surface fastener 1a can be further improved. Moreover, in the molded surface fastener 1a of this modification, substantially the same effect as the molded surface fastener 1 of Example 1 described above can be obtained except for flexibility.
- FIG. 11 is a perspective view illustrating a molded surface fastener according to the second embodiment.
- FIG. 12 is a cross-sectional view of a cross section orthogonal to the length direction of the molded surface fastener.
- the molded surface fastener 2 according to the second embodiment includes a thin plate-like base portion 11 that is long in the front-rear direction, left and right outer wall portions 50 erected on left and right side edges of the base portion 11, and left and right outer wall portions 50.
- a plurality of engaging elements 13 arranged, a lateral wall portion 15 arranged along the left-right direction, left and right magnetic wall portions 30b arranged adjacent to the inside of the outer wall portion 50, and left and right side edges of the base portion 11 And a fin piece portion 17 extending in the width direction toward the outside.
- the molded surface fastener 2 of Example 2 is different from the molded surface fastener 1 of Example 1 described above in the form of the left and right outer wall parts 50, the form of the left and right magnetic wall parts 30b, and the form of the recessed groove part 40a described later.
- the portions other than the outer wall portion 50 and the magnetic wall portion 30b are formed in substantially the same manner as the molded surface fastener 1 of the first embodiment.
- the left and right outer wall portions 50 in the second embodiment together with the magnetic wall portion 30b, form a resin intrusion prevention wall portion that prevents the foamed resin from entering the engagement region 14 from the outside in the width direction when the cushion body is foam-molded. doing.
- the left and right outer wall portions 50 are provided on a plurality of divided vertical wall portions 52 that are intermittently arranged at a predetermined formation pitch along the length direction, and on the outer wall surface side of the divided vertical wall portion 52. And a reinforcing portion 54 provided.
- the formation pitch of the divided vertical wall portions 52 is set to the same size as the formation pitch in the length direction of the engagement element 13.
- Each divided vertical wall portion 52 has a vertical wall main body portion 52a disposed on the outer side in the width direction and a pair of front and rear auxiliary vertical wall portions 52b integrally disposed on the inner side of the vertical wall main body portion 52a.
- the reinforcing portion 54 is provided integrally with the vertical wall main body 52a.
- the vertical wall main body 52a is arranged corresponding to the position of the gap between the magnetic wall bodies 31b in the magnetic wall 30b in the length direction. That is, when the molded surface fastener 2 is viewed from the left and right sides, the vertical wall main body portion 52a of the outer wall portion 50 is disposed so as to cover the gap between the magnetic wall bodies 31b in the magnetic wall portion 30b.
- the height dimension from the upper surface of the base 11 in the vertical wall main body 52a is set to be slightly larger than the height dimension from the upper surface of the base 11 in the engaging element 13 and the lateral wall 15. Further, in this case, the difference between the height dimension of the vertical wall main body 52a and the height dimension of the engagement element 13 and the horizontal wall portion 15 is set to a small size such that the foamed resin of the cushion body cannot pass through. ing.
- the pair of front and rear auxiliary vertical wall portions 52b in the divided vertical wall portion 52 are arranged between the vertical wall main body portion 52a and the magnetic wall portion 30b in the width direction.
- the auxiliary vertical wall 52b is connected to the vertical wall main body 52a and is formed away from the magnetic wall 31b.
- the pair of front and rear auxiliary vertical wall portions 52b are formed so as to partially overlap the vertical wall main body portion 52a and to extend in the front-rear direction from the vertical wall main body portion 52a when the molded surface fastener 2 is viewed from the left and right sides. Has been.
- auxiliary vertical wall portion 52b extending in the front-rear direction from the vertical wall main body portion 52a overlaps the magnetic wall 31b when the molded surface fastener 2 is viewed from the left and right sides. It is arranged.
- the height of the auxiliary vertical wall 52b from the upper surface of the base 11 is set to be the same as the height of the engaging element 13 and the lateral wall 15 from the upper surface of the base 11.
- the left and right magnetic wall portions 30b in the second embodiment are provided along the length direction at positions between the outer wall portion 50 and the engagement region 14 in the width direction.
- Each magnetic wall 30b has a plurality of magnetic walls 31b arranged in a line along the length direction, and an auxiliary magnetic wall 32 formed inside the magnetic wall 31b.
- the plurality of magnetic wall bodies 31b in the magnetic wall portion 30b are arranged intermittently with a predetermined formation pitch, similarly to the magnetic wall portion 30 of the first embodiment, and are adjacent to each other in the length direction.
- a predetermined gap is provided between the two magnetic wall bodies 31b.
- each magnetic wall 31b has a height dimension from the upper surface of the base 11 in the magnetic wall 31b that is the same as the height dimension from the upper surface of the base 11 in the vertical wall main body 52a.
- the combined element 13 and the lateral wall 15 are formed to be slightly larger than the height from the upper surface of the base 11.
- the magnetic wall 31b of the second embodiment is formed in the same manner as the magnetic wall 31 of the first embodiment, except that the height from the top surface of the base 11 is different.
- the width of the magnetic wall 31b is set larger than the width of the vertical wall body 52a of the outer wall 50, and larger than the width of the auxiliary vertical wall 52b of the outer wall 50.
- the width dimension of the magnetic wall 31b is preferably set to be larger than the total width dimension of the vertical wall body of the outer wall 50 and the auxiliary vertical wall 52b.
- the auxiliary magnetic wall portion 32 provided on the magnetic wall portion 30b of the second embodiment is formed to be connected to the magnetic wall body 31b.
- the auxiliary magnetic wall portion 32 is disposed at the same position as the position of the lateral wall portion 15 in the length direction, and a cross section perpendicular to the width direction of the auxiliary magnetic wall portion 32 is orthogonal to the width direction of the lateral wall portion 15. It is formed to have the same cross-sectional shape as the cross-section. Therefore, although the height dimension from the upper surface of the base part 11 in the auxiliary magnetic wall part 32 is smaller than the height dimension from the upper surface of the base part 11 in the magnetic wall body 31b, the engagement element 13 and the base wall 11 in the lateral wall part 15 It is the same size as the height from the top surface.
- the magnetic wall 31b and the auxiliary magnetic wall 32 of the magnetic wall 30b contain magnetic particles.
- the upper end portions of the magnetic wall body 31b and the auxiliary magnetic wall portion 32 are formed only by the second synthetic resin, and 30 wt% of magnetic particles are formed on the upper end portions of the magnetic wall portion 30b and the auxiliary magnetic wall portion 32. It is contained at a constant concentration in the range of 80 wt% or less (for example, a concentration of 50 wt%).
- the magnetic wall 31b and the auxiliary magnetic wall 32 have a mixed region formed by mixing the first synthetic resin and the second synthetic resin.
- the mixed region includes the magnetic wall 31b and the auxiliary magnetic wall 32b. It is formed in a region between the upper end portion of the magnetic wall portion 32 and the base portion 11. Thereby, the adhesiveness of the 1st synthetic resin and the 2nd synthetic resin in the magnetic wall body 31b and the auxiliary
- the magnetic wall 31b and the auxiliary magnetic wall 32 are formed such that the ratio of the second synthetic resin gradually decreases from the upper end portion toward the base 11, and the ratio of the first synthetic resin gradually increases. ing. For this reason, the content concentration of the magnetic material in the magnetic wall 31b and the auxiliary magnetic wall 32 is gradually decreased downward from the upper end of the magnetic wall 31b.
- a pair of left and right recessed groove portions 40a recessed in the upper surface portion of the base portion 11 are linearly provided along the length direction on both left and right sides of each magnetic wall portion 30b. And it is formed continuously.
- each of the magnetic wall portions 30b is provided with a pair of inner groove portions 41a and outer groove portions 42a as the groove portions 40a so as to sandwich the magnetic wall portion 30b.
- the concave groove portion 40a of the second embodiment has the same groove depth dimension as the concave groove portion 40 of the first embodiment.
- the inner concave groove portion 41a and the outer concave groove portion 42a arranged corresponding to each magnetic wall portion 30b are provided with different groove width dimensions.
- the outer recessed groove portion 42a is provided with a smaller width dimension than the inner recessed groove portion 41a.
- the outer recessed groove portion 42a is provided with a width dimension smaller than that of the inner recessed groove portion 41a, so that foamed resin is formed between the outer wall portion 50 and the magnetic wall portion 30b during foam molding of the cushion body. Can be effectively prevented from entering through a gap (a gap formed corresponding to the outer concave groove portion 42a).
- the inner concave groove portion 41a is provided with a width dimension larger than that of the outer concave groove portion 42a, so that the magnetic particles contained in the second synthetic resin are magnetic wall portions 30b when the molded surface fastener 2 is molded. Can be effectively suppressed or prevented from leaking into the lateral wall portion 15 and the engaging element 13.
- the molded surface fastener 2 of the second embodiment as described above is manufactured using the molding apparatus 60 having the die wheel 61 shown in FIGS.
- the die wheel 61 has a plurality of first laminated plates 62a and four second laminated plates 62b as in the case of the above-described first embodiment.
- the thicknesses of the first laminated plate 62a and the second laminated plate 62b are different, and the shapes of the molding cavities for molding the outer wall portion 50 and the magnetic wall portion 30b of the molded surface fastener 2 are different.
- the process of manufacturing the molded surface fastener 2 using the molding device 60 is substantially the same as that in the first embodiment.
- the left and right magnetic wall portions 30b containing magnetic particles are formed separately from the left and right outer wall portions 50, as in the molded surface fastener 1 of the first embodiment. Therefore, a simple shape that can be easily filled with the second synthetic resin can be employed as the shape of the magnetic wall portion 30b. Furthermore, at least the upper end portions of the left and right magnetic wall portions 30b are formed of only the second synthetic resin, and the upper surface of the magnetic wall portion 30b is flattened by the upper sandwiching rollers 67a of the pickup roller 67 so that the surface roughness is increased. It is formed to be small. Therefore, the molded surface fastener 2 of the second embodiment can obtain the same effects as the molded surface fastener 1 of the first embodiment.
- the molded surface fastener 2 of the second embodiment is suitably used for a cushion body (foam) (not shown) such as a seat for an automobile, similar to the molded surface fastener 2 of the first embodiment.
- the molded surface fastener 2 is integrated and the molded surface fastener 2 is engaged by performing foam molding of the cushion body using the molded surface fastener 2 of Example 2 as in the case of Example 1 described above.
- a high-quality cushion body in which the foam does not enter the region 14 can be stably manufactured.
- FIG. 13 is a perspective view showing a molded surface fastener according to the third embodiment
- FIG. 14 is a plan view of the molded surface fastener.
- 15 is a cross-sectional view taken along line XV-XV shown in FIG.
- the molded surface fastener 3 of Example 3 is formed so as to be easily curved in the width direction.
- the molded surface fastener 3 includes a plurality of surface fastener portions 80 arranged at predetermined intervals along the length direction, and a connecting portion 90 having flexibility for connecting adjacent surface fastener portions 80. .
- Each hook-and-loop fastener portion 80 includes a thin plate-like base portion 81, left and right outer wall portions 20 erected on left and right side edges of the base portion 81, and a plurality of left and right outer wall portions 20.
- Each has projecting ridges 89 projecting from the center and extending from the main lateral wall 85 toward the outside in the length direction.
- the base portion 81 of the hook-and-loop fastener portion 80 in the third embodiment is formed in a thin plate shape having a small thickness dimension in the vertical direction. Further, the base 81 of the hook-and-loop fastener portion 80 is long between the left and right edges parallel to the length direction, the front and rear edges parallel to the width direction, the left and right side edges, and the front and rear edges. It has an inclined edge arranged obliquely with respect to the vertical direction and the width direction, and has a shape exhibiting an octagonal shape in a plan view of the molded surface fastener 3.
- the left and right outer wall portions 20 of the hook-and-loop fastener portion 80 and the engagement elements 13 in the third embodiment are the same as the left and right outer wall portions 20 and the engagement elements 13 arranged in the molded surface fastener 1 of the first embodiment. Each is formed in substantially the same manner.
- Each hook-and-loop fastener portion 80 is provided with an engagement region 14 formed by a plurality of engagement elements 13 between the left and right outer wall portions 20.
- the left and right magnetic wall portions 30c in the third embodiment are provided along the length direction at a position between the outer wall portion 20 and the engagement region 14 in the width direction.
- Each magnetic wall portion 30c includes a plurality of first magnetic wall bodies 33a arranged in a line along the length direction in a central region in the length direction of the hook-and-loop fastener portion 80, and the length direction of the hook-and-loop fastener portion 80.
- the second magnetic wall body 33b disposed along the length direction at the front end portion and the rear end portion, and the auxiliary magnetic wall portion 34 formed outside the second magnetic wall body 33b.
- Each first magnetic wall 33a in the third embodiment is formed in substantially the same manner as the magnetic wall 31 disposed on the molded surface fastener 1 of the first embodiment.
- the second magnetic wall body 33b in the third embodiment is arranged at the front end portion and the rear end portion of the hook-and-loop fastener portion 80, and is formed with a length dimension larger than that of the first magnetic wall body 33a. .
- the gap between the first magnetic wall body 33a and the second magnetic wall body 33b is the same as the gap provided between the two first magnetic wall bodies 33a arranged adjacent to each other in the length direction.
- a gap is provided.
- an inclined end surface arranged in parallel with the inclined edge of the base 81 is provided at the end of the second magnetic wall 33b opposite to the side adjacent to the first magnetic wall 33a. That is, the inclined end surface of the second magnetic wall 33 b is formed on a flat surface that is inclined with respect to the length direction and the width direction in a plan view of the molded surface fastener 3.
- the width dimension of the second magnetic wall 33b is set to the width dimension of the first magnetic wall 33a.
- the auxiliary magnetic wall portion 34 provided in the magnetic wall portion 30c of the third embodiment is formed to be connected to the outer wall surface of the second magnetic wall body 33b.
- the auxiliary magnetic wall 34 is arranged in the length direction so as to correspond to a region where a main horizontal wall 85 and a divided horizontal wall 86a (described later) in the auxiliary horizontal wall 86 are provided.
- the width of the auxiliary magnetic wall 34 is set smaller than the width of the first magnetic wall 33a and the second magnetic wall 33b.
- the interval between the auxiliary magnetic wall portion 34 and the outer wall portion 20 is set to be between the first magnetic wall body 33a and the second magnetic wall body 33b and the outer wall portion 20.
- the distance between the auxiliary magnetic wall portion 34 and the outer wall portion 20 is set to such a small size that the foamed resin of the cushion body cannot pass through.
- the height from the top surface of the base 81 of the first magnetic wall 33a, the second magnetic wall 33b, and the auxiliary magnetic wall 34 in the magnetic wall 30c is set to the same size.
- the height is set to the same size as the height from the upper surface of the base 81 in the divided vertical wall portion 22 of the outer wall portion 20.
- the first magnetic wall 33a, the second magnetic wall 33b, and the auxiliary magnetic wall 34 of the magnetic wall 30c contain magnetic particles.
- the upper ends of the first magnetic wall 33a, the second magnetic wall 33b, and the auxiliary magnetic wall 34 are formed only from the second synthetic resin, and 30 wt% of magnetic particles are formed in the upper end. It is contained at a constant concentration in the range of 80 wt% or less (for example, a concentration of 50 wt%).
- first magnetic wall 33a, the second magnetic wall 33b, and the auxiliary magnetic wall 34 have a mixed region formed by mixing the first synthetic resin and the second synthetic resin.
- the mixed region is formed between each upper end portion and the base portion 81.
- the ratio of the second synthetic resin gradually decreases from the upper end to the base 81, and the first synthetic resin The ratio is formed so as to increase gradually.
- each magnetic wall portion 30c is provided with a set of an inner groove portion 41b and an outer groove portion 42b as the groove portions 40b so as to sandwich the magnetic wall portion 30c.
- the outer groove portion 42b is provided with a width dimension smaller than that of the inner groove portion 41b as shown in FIG.
- the pair of front and rear main horizontal wall portions 85 are integrally formed on the upper surface of the base portion 81 such that the engagement region 14 of the hook-and-loop fastener portion 80 is sandwiched from the front and rear by the front end edge portion and the rear end edge portion of the base portion 81. It is erected.
- the front and rear main horizontal wall portions 85 are arranged in the region between the left and right second magnetic wall bodies 33b along the width direction.
- the main horizontal wall portion 85 is disposed so as to be separated from the left and right second magnetic wall bodies 33b by the size of the groove width dimension of the inner concave groove portion 41b described later. In this case, the distance between the main horizontal wall portion 85 and the left and right second magnetic wall bodies 33b is set to a small size such that the foamed resin of the cushion body cannot pass through.
- the main horizontal wall 85 is formed with two slits 85a cut from the upper end of the main horizontal wall 85 to the upper surface of the base 81.
- the dimension in the width direction of each slit 85a of the main horizontal wall portion 85 is set to a small size such that the foamed resin of the cushion body cannot pass through.
- the front and rear auxiliary horizontal wall portions 86 in the third embodiment are arranged in parallel in a state of being separated from the front and rear main horizontal wall portions 85 on the engagement region 14 side.
- the distance in the length direction between the main horizontal wall portion 85 and the auxiliary horizontal wall portion 86, which will be described later, is set smaller than the formation pitch in the length direction of the engagement elements 13.
- the left and right side edge portions of the main horizontal wall portion 85 and the left and right side edge portions of the auxiliary horizontal wall portion 86 are connected to each other by a connecting side wall portion 87.
- the auxiliary horizontal wall portion 86 of the third embodiment is disposed along the width direction in a region between the left and right second magnetic wall bodies 33b. Similarly to the main horizontal wall portion 85, the auxiliary horizontal wall portion 86 is spaced from the left and right second magnetic wall bodies 33b by the size of the groove width dimension of the inner concave groove portion 41b.
- the auxiliary horizontal wall portion 86 is arranged between a plurality of divided horizontal wall bodies 86a that are intermittently provided along the width direction with a certain height from the upper surface of the base portion 81, and between each divided horizontal wall body 86a.
- the divided horizontal wall 86a of the auxiliary horizontal wall 86 is erected on the upper surface of the base 81 and has a rectangular parallelepiped shape.
- the auxiliary engagement element 86b is hooked vertically from the upper surface of the base portion 81 and from the upper end of the rising portion toward the engagement region 14 (in the longitudinal direction of the hook-and-loop fastener portion 80). And a cantilevered engagement head curved in a shape.
- the connecting portion 90 that connects adjacent hook-and-loop fastener portions 80 includes a thin plate-like base portion 81 and a protruding portion 89 that protrudes from the upper surface of the base portion 81.
- the base portion 81 and the protruding strip portion 89 of each connecting portion 90 are connected to the base portion 81 and the protruding strip portion 89 of the hook-and-loop fastener portion 80 without providing a step.
- the ridges 89 provided on the hook-and-loop fastener portion 80 and the ridges 89 provided on the connecting portion 90 are integrated with the upper surface of the base 81 so that the cross section perpendicular to the length direction is rectangular. Is projected.
- the molding surface fastener 3 of the third embodiment as described above uses the molding device 60 having the die wheel 61 shown in FIGS. 5 to 8, and the plurality of surface fastener portions 80 are connected to the connecting portion 90 described above. 14, a straight primary molded body in a state of being connected by a cut portion 95 as indicated by a broken line is formed, and then the cut portion 95 shown in FIG. Manufactured by cutting with a processing device.
- the die wheel 61 has a plurality of first laminated plates 62a and four second laminated plates 62b as in the case of the above-described first embodiment.
- the thicknesses of the first laminated plate 62a and the second laminated plate 62b are different, and the shape of the molding cavity formed in the first laminated plate 62a is different.
- the step of forming the primary molded body using the forming device 60 is substantially the same as the step of forming the molded surface fastener 1 in the above-described first embodiment.
- a cutting processing apparatus (not shown) has a cutting die for placing the primary molded body, and a cutting punch that is arranged so as to be movable up and down with respect to the cutting die and can partially cut the primary molded body.
- the primary molded body that is continuously conveyed is formed so that it can be cut.
- the left and right magnetic wall portions 30c containing magnetic particles are formed separately from the left and right outer wall portions 20, as in the molded surface fastener 1 of the first embodiment. Therefore, a simple shape that can be easily filled with the second synthetic resin can be adopted as the shape of the magnetic wall portion 30c. Further, at least the upper end portions of the left and right magnetic wall portions 30 c are formed of only the second synthetic resin, and the upper surface of the magnetic wall portion 30 c is flattened by the upper sandwiching rollers 67 a of the pickup roller 67 so that the surface roughness is increased. It is formed to be small. Therefore, the molded surface fastener 3 of the third embodiment can obtain the same effects as the molded surface fastener 1 of the first embodiment.
- the molded surface fastener 3 of the third embodiment is formed by connecting a plurality of surface fastener portions 80 in series by a connecting portion 90 having flexibility. Therefore, the molded surface fastener 3 of the third embodiment can be easily bent in the vertical direction with respect to the length direction, and can also be easily bent in the horizontal direction with respect to the length direction. It is. For this reason, the molded surface fastener 3 according to the third embodiment is a curved surface molded fastener 3 that can be integrated with the cushion body in an arcuate state curved in the width direction, for example.
- each surface fastener portion 80 of the molded surface fastener 3 includes the left and right outer wall portions 20, front and rear main horizontal wall portions 85, front and rear auxiliary horizontal wall portions 86, and left and right magnetic wall portions 30c of the surface fastener portion 80.
- the upper surface is held in close contact with the fastener mounting surface of the mold.
- the left and right magnetic wall portions 30c are arranged on the inner side of the left and right outer wall portions 20, and the left and right magnetic walls are arranged.
- the interval between the portions 30c is narrowed.
- the left and right magnetic wall portions 30c are simultaneously attracted by narrow magnets, and the molded surface fastener 3 can be stably moved without causing a positional shift in the fastener holding portion (fastener mounting surface) of the mold. Can be fixed.
- foaming of the cushion body is performed by injecting foamed resin into the mold.
- the left and right outer wall portions 20, the front and rear main horizontal wall portions 85, the front and rear auxiliary horizontal wall portions 86, and the left and right magnetic wall portions 30c in each surface fastener portion 80 are in close contact with the fastener mounting surface of the mold as described above. Therefore, the foamed resin does not penetrate these portions and enter the engaging region 14 of the hook-and-loop fastener portion 80, and the engaging element 13 can be stably embedded with the foamed resin of the cushion body. Can be prevented.
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Abstract
Description
特に本発明に係る成形面ファスナーにおいて、前記磁性壁部は、前記第1合成樹脂と前記第2合成樹脂とが混ざり合って形成される混在領域を有することが好ましい。
この場合、前記凹溝部は、前記基部の上面から一定の溝深さを有するとともに、長さ方向に沿って連続的に凹設されていることが好ましい。また、前記凹溝部は、前記磁性壁部よりも前記係合素子寄りに配される内側凹溝部と、前記磁性壁部よりも前記外壁部寄りに配される外側凹溝部とを有し、前記内側凹溝部の幅寸法と前記外側凹溝部の幅寸法とは、互いに異なる大きさを有することが好ましい。
また、前記磁性壁部は、長さ方向に沿って所定のピッチで間欠的に配される複数の磁性壁体を有することが好ましい。
また、前記磁性壁部の幅方向における寸法は、前記磁性粒子の平均粒径の大きさの1倍以上6倍以下であることが好ましい。
更に、前記成形面ファスナーは、前記成形面ファスナーが一体化されるクッション体の成形用金型に取り付けられた状態において、左側の前記磁性壁部の上面における少なくとも一部と、右側の前記磁性壁部の上面における少なくとも一部とが、前記成形用金型に装着された磁石に接触可能に形成されていることが好ましい。
更に、成形面ファスナーは、成形面ファスナーが一体化されるクッション体の成形用金型に取り付けられた状態において、左側の磁性壁部の上面における少なくとも一部と、右側の磁性壁部の上面における少なくとも一部とが、成形用金型に装着された磁石に接触可能に形成されている。これにより、本発明の成形面ファスナーを、成形用金型の所定の位置に磁力によって安定して固定できる。
一方、凹溝部40の溝深さ寸法を基部11の厚さ寸法の70%以下(好ましくは60%以下)に設定することにより、凹溝部40が設けられても基部11の強度を適切に確保できる。
本実施例1の成形装置60は、一方向(図面では反時計回り方向)に駆動回転するダイホイール61と、ダイホイール61の周面に対向して配され、溶融した第1合成樹脂及び第2合成樹脂をそれぞれ別々に連続して吐出する押出ノズル66と、押出ノズル66よりもダイホイール61の回転方向下流側(機械方向の前方側)に配されるピックアップローラ67とを有する。
その結果、図1に示したような成形面ファスナー1が、ダイホイール61の外周面に機械方向に沿って連続的に成形される。
本実施例2の成形面ファスナー2は、前後方向に長尺な薄板状の基部11と、基部11の左右側縁部に立設される左右の外壁部50と、左右の外壁部50間に配される複数の係合素子13と、左右方向に沿って配される横壁部15と、外壁部50の内側に隣接して配される左右の磁性壁部30bと、基部11の左右側縁から外側に向けて幅方向に延設されるヒレ片部17とを有する。
2,3 成形面ファスナー
11 基部
13 係合素子
13a 立ち上がり部
13b 係合頭部
14 係合領域
15 横壁部
15a 第1横壁部
15b 第2横壁部
15c 連結横壁部
17 ヒレ片部
20 外壁部
21 縦壁列
21a 第1縦壁列
21b 第2縦壁列
22 分割縦壁部
23 連結壁部
24 補強部
30,30a 磁性壁部
30b,30c 磁性壁部
31,31a 磁性壁体
31b 磁性壁体
32 補助磁性壁部
33a 第1磁性壁体
33b 第2磁性壁体
34 補助磁性壁部
35 混在領域
37 第2合成樹脂のみの部分と混在領域の境界部
38 磁性壁体の長さ方向における中心線
40,40a 凹溝部
40b 凹溝部
41,41a 内側凹溝部
41b 内側凹溝部
42,42a 外側凹溝部
42b 外側凹溝部
50 外壁部
52 分割縦壁部
52a 縦壁本体部
52b 補助縦壁部
54 補強部
60 成形装置
61 ダイホイール
62 積層プレート
62a 第1積層プレート
62b 第2積層プレート
63 回転軸部
66 押出ノズル
66a 第1流路
66b 第2流路
66c 吐出面
66d 第1吐出口
66e 第2吐出口
67 ピックアップローラ
67a 上側挟持ローラ
67b 下側挟持ローラ
70 金型
71 ファスナー保持部
72 ファスナー取付面(キャビティ面)
73 磁石
75 クッション体(発泡体)
80 面ファスナー部
81 基部
85 主横壁部
85a スリット
86 補助横壁部
86a 分割横壁体
86b 補助係合素子
87 連結側壁部
89 凸条部
90 連結部
95 切除部
D1 左右の磁性壁部の内壁面間の間隔
D2 左右の磁性壁部の外壁面間の間隔
MD 機械方向
W 磁石の幅寸法
Claims (12)
- 薄板状の基部(11,81) と、前記基部(11,81) の上面に長さ方向に沿って立設される左右の外壁部(20,50) と、左右の前記外壁部(20,50) 間に配される複数の係合素子(13)とを有し、第1合成樹脂と、磁性粒子を一定の割合で含有する第2合成樹脂とが互いに溶融一体化されて成形された成形面ファスナー(1,1a,2,3)において、
左右の前記外壁部(20,50) の少なくとも上端部は、前記第1合成樹脂のみによって形成され、
前記基部(11,81) の上面に、少なくとも上端部が前記第2合成樹脂のみによって形成された左右の磁性壁部(30,30a,30b,30c)が立設され、
左右の前記磁性壁部(30,30a,30b,30c)は、幅方向における前記外壁部(20,50) と前記係合素子(13)との間の位置に、長さ方向に沿ってそれぞれ配される、
ことを特徴とする成形面ファスナー。 - 前記磁性壁部(30,30a,30b,30c)は、前記第1合成樹脂と前記第2合成樹脂とが混ざり合って形成される混在領域(35)を有することを特徴とする請求項1記載の成形面ファスナー。
- 前記基部(11,81) は、前記基部(11,81) の上面部に凹設されるとともに、各外壁部(20,50) と各磁性壁部(30,30a,30b,30c)の間、及び前記係合素子(13)と各磁性壁部(30,30a,30b,30c)の間に配される凹溝部(40,40a,40b)を有することを特徴とする請求項1又は2記載の成形面ファスナー。
- 前記凹溝部(40,40a,40b)は、前記基部(11,81) の上面から一定の溝深さを有するとともに、長さ方向に沿って連続的に凹設されていることを特徴とする請求項3記載の成形面ファスナー。
- 前記凹溝部(40,40a,40b)は、前記磁性壁部(30,30a,30b,30c)よりも前記係合素子(13)寄りに配される内側凹溝部(41,41a,41b)と、前記磁性壁部(30,30a,30b,30c)よりも前記外壁部(20,50) 寄りに配される外側凹溝部(42,42a,42b)とを有し、
前記内側凹溝部(41,41a,41b)の幅寸法と前記外側凹溝部(42,42a,42b)の幅寸法とは、互いに異なる大きさを有する、
ことを特徴とする請求項3又は4記載の成形面ファスナー。 - 前記磁性壁部(30,30a,30b,30c)の高さ寸法は、前記外壁部(20,50) の高さ寸法と同じであることを特徴とする請求項1~5のいずれかに記載の成形面ファスナー。
- 前記磁性壁部(30,30a,30b,30c)は、長さ方向に沿って所定のピッチで間欠的に配される複数の磁性壁体(31,31a,31b,33a,33b)を有することを特徴とする請求項1~6のいずれかに記載の成形面ファスナー。
- 各磁性壁体(31,31a,31b,33a,33b)は、前記第1合成樹脂と前記第2合成樹脂とが混ざり合って形成される混在領域(35)を有し、
前記混在領域(35)は、前記成形面ファスナー(1,1a,2,3)の長さ方向の一方側に偏って配されてなる、
請求項7記載の成形面ファスナー。 - 前記磁性壁部(30,30a,30b,30c)の幅方向における寸法は、前記磁性粒子の平均粒径の大きさの1倍以上6倍以下である請求項1~8のいずれかに記載の成形面ファスナー。
- 前記成形面ファスナー(1,1a,2,3)は、前記成形面ファスナー(1,1a,2,3)が一体化されるクッション体の成形用金型(70)に取り付けられた状態において、左側の前記磁性壁部(30,30a,30b,30c)の上面における少なくとも一部と、右側の前記磁性壁部(30,30a,30b,30c)の上面における少なくとも一部とが、前記成形用金型(70)に装着された磁石(73)に接触可能に形成されてなる請求項1~9のいずれかに記載の成形面ファスナー。
- 一方向に回転するダイホイール(61)と、前記ダイホイール(61)に向けて第1合成樹脂及び磁性粒子を一定の割合で含有する第2合成樹脂を溶融した状態で吐出する押出ノズル(66)とを有する成形装置(60)を用いて、薄板状の基部(11,81) と、前記基部(11,81) の上面に長さ方向に沿って立設される左右の外壁部(20,50) と、左右の前記外壁部(20,50) 間に配される複数の係合素子(13)とを有する成形面ファスナー(1,1a,2,3)を製造する製造方法において、
回転する前記ダイホイール(61)に向けて、前記押出ノズル(66)の第1吐出口(66d) から前記第1合成樹脂を吐出するとともに、前記押出ノズル(66)の第2吐出口(66e) から前記第2合成樹脂を吐出すること、
前記第1合成樹脂のみによって、左右の前記外壁部(20,50) の少なくとも上端部を形成すること、及び、
前記第2合成樹脂のみによって少なくとも上端部が形成され、且つ、幅方向における前記外壁部(20,50) と前記係合素子(13)との間の位置に長さ方向に沿って配される左右の磁性壁部(30,30a,30b,30c)を、前記基部(11,81) の上面に成形すること、
を含むことを特徴とする成形面ファスナーの製造方法。 - 前記ダイホイール(61)を、複数のリング状積層プレート(62)を回転軸方向に重ねることにより形成すること、
前記積層プレート(62)として、一定の半径を有する複数の第1積層プレート(62a) と、前記第1積層プレート(62a) よりも大きな一定の半径を有する複数の第2積層プレート(62b) とを用いること、
各第2吐出口(66e) に対して2つ一組の前記第2積層プレート(62b) を用いるとともに、一組の前記第2積層プレート(62b) を、前記第2吐出口(66e) が一組の前記第2積層プレート(62b) 間に配されるように配置すること、及び、
前記ダイホイール(61)における前記第1積層プレート(62a) と前記第2積層プレート(62b) との間の半径の違いにより、前記成形面ファスナー(1,1a,2,3)に、前記基部(11,81) の上面部に凹設されるとともに各磁性壁部(30,30a,30b,30c)の左右両側に配される凹溝部(40,40a,40b)を成形すること、
を含むことを特徴とする請求項11記載の成形面ファスナーの製造方法。
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- 2018-02-13 CN CN201880088170.6A patent/CN111655065B/zh active Active
- 2018-02-13 JP JP2019571834A patent/JP7073015B2/ja active Active
- 2018-02-13 US US16/963,744 patent/US11528966B2/en active Active
- 2018-02-13 DE DE112018007071.9T patent/DE112018007071T5/de active Pending
- 2018-02-13 KR KR1020207021005A patent/KR102411335B1/ko active IP Right Grant
- 2018-02-13 BR BR112020013423-6A patent/BR112020013423A2/pt not_active Application Discontinuation
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KR20200103046A (ko) | 2020-09-01 |
CN111655065B (zh) | 2023-02-21 |
KR102411335B1 (ko) | 2022-06-22 |
US11528966B2 (en) | 2022-12-20 |
JP7073015B2 (ja) | 2022-05-23 |
JPWO2019159223A1 (ja) | 2020-10-22 |
US20210093053A1 (en) | 2021-04-01 |
BR112020013423A2 (pt) | 2020-12-01 |
CN111655065A (zh) | 2020-09-11 |
DE112018007071T5 (de) | 2020-11-05 |
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