Velcro tape manufacturing method and molding device

Abstract

This method for manufacturing a fastening tape (50) comprises a molding step in which at least the base section (51) is molded by supplying molten synthetic resin from a supply nozzle section (20) toward a mold wheel (11) rotating in one direction. The molding step includes molding the base portion (51) in a state in which a temperature difference is provided between at least two different positions in the orthogonal direction (CD) of at least one of the supply nozzle portion (20) and the mold wheel (11) by heating by the heater portion (23). As a result, the base part (51) has a uniform or substantially uniform thickness in the width direction, and a fastening tape (50) that is less susceptible to undulating wrinkles even when wound around a recovery roller can be manufactured.

Description

Technical Field

[0001] The present invention relates to a manufacturing method and a forming device for a hook-and-loop fastener. Background Art

[0002] Conventionally, a hook-and-loop fastener product is known in which a female hook-and-loop fastener having a plurality of loops (hereinafter referred to as a loop member) and a male hook-and-loop fastener that can be detached from and attached to the loop member are combined and used. The male hook-and-loop fastener has, for example, a flat base portion; and a plurality of engaging elements that project from the base portion and have a shape such as a mushroom shape.

[0003] Hook-and-loop fasteners are currently widely used in a variety of products, and are also used in products that are worn and removed relative to the body, such as disposable diapers, diaper pants for infants, protective devices for protecting joints of hands and feet, lumbar supports (low back pain belts), gloves, and the like. In addition, an example of a hook-and-loop fastener used for disposable diapers and the like is disclosed in International Publication No. 2017 / 109902 (Patent Document 1).

[0004] The hook-and-loop fastener described in Patent Document 1 has a base portion and a plurality of engaging elements that project from the base portion. Each engaging element of Patent Document 1 has a rod portion that stands up from the base portion and a disk-shaped engaging head that is integrally formed at the upper end portion of the rod portion. A plurality of minute claw portions that project from the outer peripheral edge portion of the engaging head are provided on the engaging head.

[0005] In such a hook-and-loop fastener of Patent Document 1, by providing minute claw portions on the engaging head of the engaging element, it is possible to easily hook the loop of the loop member on each engaging element, and it is also possible to prevent the hooked loop from easily detaching from the engaging element. Thereby, the peel strength (sometimes also referred to as the engaging strength) of the hook-and-loop fastener with respect to the loop member can be improved.

[0006] As Figure 8 shown, the hook-and-loop fastener of Patent Document 1 is manufactured using a manufacturing apparatus 80 having a forming apparatus 81 that performs primary forming and a heating and pressing apparatus 91 that performs secondary forming. The forming apparatus 81 has: a die wheel 82 that rotates in one direction; a supply portion 86 that is disposed opposite to the outer peripheral surface of the die wheel 82; and a pickup roller 87 that is disposed at a position downstream of the supply portion 86 in the rotation direction of the die wheel 82.

[0007] The die wheel 82 includes: a cylindrical outer sleeve 83 that serves as a die; a cylindrical inner sleeve 84 that is disposed inside the outer sleeve 83 in close contact with the outer sleeve 83; and a rotation drive roller 85 that rotates the outer sleeve 83 and the inner sleeve 84 in one direction. A plurality of through holes that penetrate from the outer peripheral surface to the inner peripheral surface of the outer sleeve 83 are provided in the outer sleeve 83. A plurality of recesses are provided on the outer peripheral surface of the inner sleeve 84.

[0008] The heating and pressing device 91 has a pair of upper and lower pressing rollers (calendering rollers) 92 and 93.

[0009] When manufacturing the hook-and-loop fastener using Figure 8 the manufacturing device 80 shown, first, a primary forming process is performed in the forming device 81. In the primary forming process, the molten thermoplastic resin is continuously supplied from the supply unit 86 toward the rotating die wheel 82, and thus a primary formed body is formed along the machine direction on the outer peripheral surface of the die wheel 82. The primary formed body has a base portion and a plurality of primary elements provided on the base portion. At this time, the base portion of the primary formed body is formed between the die wheel 82 and the supply unit 86, and the primary elements are formed through the through holes of the outer sleeve 83 provided on the die wheel 82 and the recesses provided on the inner sleeve 84.

[0010] Next, the primary formed body formed in the primary forming process is peeled off from the die wheel 82 and conveyed to the heating and pressing device 91. A secondary forming process is performed in the heating and pressing device 91. In this secondary forming process, the primary formed body is introduced between the upper and lower pressing rollers 92 and 93 to press the upper end portions of the primary elements, thereby deforming the upper end portions of the primary elements. As a result, a engaging element having a engaging head with claw portions provided on the outer peripheral edge portion is formed, and thus the hook-and-loop fastener of Patent Document 1 is manufactured.

[0011] Prior Art Documents

[0012] Patent Documents

[0013] Patent Document 1: International Publication No. 2017 / 109902 Summary of the Invention

[0014] Problems to be Solved by the Invention

[0015] In Figure 8 the manufacturing device 80 shown, when performing the primary forming process using the forming device 81, as a method of cooling the primary formed body formed on the outer peripheral surface of the die wheel 82, sometimes a cooling tank for storing a coolant is provided below the die wheel 82. The cooling tank is arranged in such a way that the lower part of the die wheel 82 is immersed in the coolant, and by passing the primary formed body formed by the die wheel 82 through the coolant, the primary formed body can be efficiently cooled.

[0016] However, when manufacturing the hook-and-loop fastener by providing the above-mentioned cooling tank in the forming device performing the primary forming process, the following thickness variation is generated in the width direction of the manufactured hook-and-loop fastener, that is, the thickness of the central portion in the width direction of the base portion is thinner than the thickness of the left and right side edge portions in the width direction of the base portion.

[0017] When the hook-and-loop fastener having such a thickness change at the base is wound around a recovery roller and recovered after manufacture, the hook-and-loop fastener is wound around the recovery roller and held in a state of having a concavo-convex shape in which a central portion in the width direction is recessed and left and right side edge portions in the width direction are raised at the base. In addition, the greater the amount (number of turns) of the hook-and-loop fastener wound around the recovery roller, the greater the concavo-convex difference between the central portion and the left and right side edge portions in the width direction at the base.

[0018] When the hook-and-loop fastener held on the recovery roller in a state having a concavo-convex difference in the width direction as described above is pulled out from the recovery roller and used, there is the following problem: On the pulled-out hook-and-loop fastener, wrinkles having a shape in which the base portion undulates in the up-down direction (front-back direction) are generated at the left and right side edge portions of the base portion. Such undulating wrinkles affect the quality and performance of the hook-and-loop fastener, and thus improvement is sought.

[0019] The present invention has been made in view of the above problems, and an object thereof is to provide a method for manufacturing a hook-and-loop fastener and a forming device used in the manufacturing method, which can manufacture a hook-and-loop fastener in which a base portion has a uniform thickness in the width direction and which is less likely to generate undulating wrinkles even when wound around a recovery roller.

[0020] Means for Solving the Problem

[0021] In order to achieve the above object, the method for manufacturing a hook-and-loop fastener provided by the present invention is a method for manufacturing a hook-and-loop fastener made of a synthetic resin, the hook-and-loop fastener having a base portion that is long in the machine direction and a plurality of engaging elements provided on the base portion, the base portion having a base central portion disposed at a central portion in the orthogonal direction orthogonal to the machine direction of the base portion and a pair of base side edge portions disposed at both ends in the orthogonal direction of the base portion, wherein the method for manufacturing the hook-and-loop fastener includes a forming step in which the base portion is formed at least by supplying a molten synthetic resin from a supply nozzle portion toward a mold wheel rotating in one direction, and the forming step includes: forming the base portion in a state where a temperature difference is provided between at least two different positions in the orthogonal direction of at least one of the supply nozzle portion and the mold wheel by heating with a heater portion.

[0022] In the manufacturing method of the present invention, preferably, the forming step includes: forming the base portion between the outer peripheral surface of the die wheel and the opposing surface of the supply nozzle portion facing the die wheel, and setting a temperature difference between at least one of the pair of nozzle-side second forming portions for forming the pair of base-side edge portions of the base portion and the nozzle-side first forming portion for forming the base central portion of the base portion in the supply nozzle portion, such that the temperature of the nozzle-side second forming portion is higher than that of the nozzle-side first forming portion.

[0023] Alternatively, in the manufacturing method of the present invention, it may be that the forming step includes: forming the base portion between the outer peripheral surface of the die wheel and the opposing surface of the supply nozzle portion facing the die wheel, and setting a temperature difference between at least one of the pair of wheel-side second forming portions for forming the pair of base-side edge portions of the base portion and the wheel-side first forming portion for forming the base central portion of the base portion in the die wheel, such that the temperature of the wheel-side second forming portion is higher than that of the wheel-side first forming portion.

[0024] And preferably, the manufacturing method of the present invention includes making the temperature difference be 20 °C or more.

[0025] Next, the forming device provided by the present invention is a forming device for manufacturing a synthetic resin hook-and-loop fastener. The synthetic resin hook-and-loop fastener has a base portion elongated in the machine direction and a plurality of engaging elements provided on the base portion. The base portion includes a base central portion disposed at the center in the orthogonal direction orthogonal to the machine direction of the base portion and a pair of base-side edge portions disposed at both ends in the orthogonal direction of the base portion. The forming device at least forms the base portion. Among them, the forming device has: a die wheel that rotates in one direction; a supply nozzle portion that supplies molten synthetic resin toward the die wheel; and a heater portion that heats the supply nozzle portion and / or the die wheel. The supply nozzle portion has: a nozzle-side first forming portion that forms the base central portion of the base portion; and a pair of nozzle-side second forming portions that form the pair of base-side edge portions of the base portion. The die wheel has: a wheel-side first forming portion that forms the base central portion of the base portion; and a pair of wheel-side second forming portions that form the pair of base-side edge portions of the base portion. The heater portion is used to locally heat at least one of the pair of nozzle-side second forming portions in the supply nozzle portion and / or at least one of the pair of wheel-side second forming portions in the die wheel.

[0026] In the forming device of the present invention, preferably, the die wheel and the supply nozzle portion have a structure for forming the base portion between the outer peripheral surface of the die wheel and the opposing surface of the supply nozzle portion that faces the die wheel, and the heater portion has a pair of side heater portions that respectively heat the pair of nozzle-side second forming portions.

[0027] In this case, preferably, at least a part of the side heater portion is disposed within the supply nozzle portion.

[0028] Further, in the forming device of the present invention, preferably, the supply nozzle portion is formed of a metal having a thermal conductivity of 100 W / m·K or less.

[0029] Effects of the Invention

[0030] According to the manufacturing method of the present invention, it is possible to manufacture a hook-and-loop fastener in which the base portion has a uniform or substantially uniform thickness in the width direction and is not easily prone to undulating wrinkles even when wound around a recovery roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic view showing a manufacturing apparatus used in the method for manufacturing a hook-and-loop fastener according to an embodiment of the present invention.

[0032] Figure 2 is schematically shown Figure 1 a perspective view of a supply nozzle portion used in the primary forming device of the manufacturing apparatus shown.

[0033] Figure 3 is schematically shown Figure 1 a cross-sectional view taken along line III-III of the cross section shown.

[0034] Figure 4 is a perspective view schematically showing an outer sleeve and an inner sleeve used in the primary forming device.

[0035] Figure 5 is a perspective view schematically showing a primary formed body formed in the primary forming process.

[0036] Figure 6 is a perspective view schematically showing a hook-and-loop fastener manufactured by the manufacturing method of the example.

[0037] Figure 7 is schematically shown Figure 6 a cross-sectional view of a main part of the hook-and-loop fastener shown.

[0038] Figure 8 is a schematic view schematically showing a conventional manufacturing apparatus for a hook-and-loop fastener. DETAILED DESCRIPTION OF THE INVENTION

[0039] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying Figure 1 drawings. In addition, the present invention is not limited to any of the embodiments described below, and various modifications can be made as long as the structure is substantially the same as that of the present invention and the same effects are achieved.

[0040] Figure 1 FIG. is a schematic view showing a manufacturing apparatus used in the method for manufacturing a hook-and-loop fastener according to this embodiment. Figure 2 FIG. is a perspective view schematically showing a supply nozzle portion used in the primary forming apparatus. Figure 3 is schematically showing Figure 1 a cross-sectional view taken along line III-III shown in FIG. Figure 4 FIG. is a perspective view schematically showing an outer sleeve and an inner sleeve used in the primary forming apparatus.

[0041] In addition, in the following description, the machine direction (M direction or MD) is the direction along which the primary formed body and the hook-and-loop fastener are conveyed in the manufacturing process of the hook-and-loop fastener, and is sometimes referred to as the front-rear direction. Further, the machine direction and the front-rear direction are the length directions of the long-strip-shaped primary formed body and the hook-and-loop fastener.

[0042] The orthogonal direction (C direction or CD) is the width direction orthogonal to the machine direction and along the upper surface (first surface) of the base portion, and is sometimes referred to as the left-right direction. Further, the orthogonal direction and the left-right direction are the width directions of the long-strip-shaped primary formed body and the hook-and-loop fastener.

[0043] The thickness direction is the direction along the direction orthogonal to the upper surface of the base portion, and is sometimes referred to as the up-down direction or the height direction. The thickness direction and the up-down direction are directions orthogonal to both the machine direction and the orthogonal direction. In this case, the side where the engaging element protrudes from the base portion is set as the upper side, and the opposite side is set as the lower side.

[0044] According to the manufacturing method of the present embodiment, as Figure 6 and Figure 7 shown, a synthetic resin hook-and-loop fastener 50 is manufactured in which a plurality of engaging elements 52 are integrally formed on the upper surface of a thin plate-shaped base portion 51. The hook-and-loop fastener 50 is formed long along the Figure 1 machine direction MD of the manufacturing apparatus 1 shown in FIG.

[0045] While referring to Figures 1 to 4 the manufacturing apparatus 1 for manufacturing such a hook-and-loop fastener 50 will be described.

[0046] The manufacturing apparatus 1 of the present embodiment includes: a primary forming apparatus 10 that performs primary forming; a heating and pressing apparatus (secondary forming apparatus) 30 that presses the formed product of the primary forming apparatus 10 Figure 5The primary formed body 60 is subjected to secondary forming.

[0047] The primary forming device 10 includes: a die wheel 11 that rotates in one direction (counterclockwise in the drawings); a resin supply unit 16 that is disposed opposite to the outer peripheral surface of the die wheel 11 and continuously extrudes or discharges the molten synthetic resin material; and a pickup roll 18 that is disposed at a position downstream of the resin supply unit 16 in the rotation direction of the die wheel 11.

[0048] The die wheel 11 includes: an outer sleeve 12 having a cylindrical shape that serves as a die (also referred to as an outer cylindrical body); an inner sleeve 13 having a cylindrical shape (also referred to as an inner cylindrical body) that is disposed inside the outer sleeve 12 in close contact with the outer sleeve 12; and a rotation drive roll 14 to which the outer sleeve 12 and the inner sleeve 13 are attached. In addition, in order to clearly show the structure of the die wheel 11, in Figure 1 and Figure 3 the hatching indicating the cross section of the rotation drive roll 14 is omitted.

[0049] In the die wheel 11 of the present embodiment, cooling grooves 15 for storing a coolant are provided on the lower side of the die wheel 11 in such a manner that a part of the die wheel 11 is immersed in the coolant. The rotation drive roll 14 is formed so that the outer sleeve 12 and the inner sleeve 13 attached to the rotation drive roll 14 rotate in one direction ( Figure 1 counterclockwise direction in

[0050] As shown in Figure 4 , in the outer sleeve 12, a plurality of through holes 12a penetrating from the outer peripheral surface to the inner peripheral surface of the outer sleeve 12 are formed as mold cavities for forming parts of subsequent-described primary elements 62 of the primary formed body 60. For example, in the present embodiment, the subsequent-described primary rod portions 63 of the primary elements 62 are formed by filling synthetic resin into the respective through holes 12a of the outer sleeve 12.

[0051] In the present embodiment, the plurality of through holes 12a are provided corresponding to the positions where the engaging elements 52 are formed in the Figure 6 hook-and-loop fastener 50. For example, in the present embodiment, the plurality of through holes 12a are regularly arranged at regular intervals along the machine direction MD (circumferential direction of the outer sleeve 12), and are also regularly arranged at regular intervals along the orthogonal direction CD (direction parallel to the rotation axis of the outer sleeve 12).

[0052] Each through-hole 12a has a substantially frustoconical shape in which the circle on the outer peripheral surface side of the outer sleeve 12 is formed larger than the circle on the inner peripheral surface side of the outer sleeve 12. In addition, in the present invention, the positions, sizes, shapes, etc. of the plurality of through-holes 12a provided in the outer sleeve 12 are not particularly limited.

[0053] On the outer peripheral surface of the inner sleeve 13, a plurality of groove portions 13a are formed as cavities for forming parts of the primary forming element 62 (specifically, the rib portion 64 and the protrusion portion 65 to be described later). Each groove portion 13a is recessed linearly along an orthogonal direction CD parallel to the rotation axis of the inner sleeve 13, and is recessed to a size that allows the molten synthetic resin to flow in.

[0054] The plurality of groove portions 13a are formed at regular intervals along the circumferential direction (machine direction MD) of the inner sleeve 13. In addition, the groove portion 13a of the inner sleeve 13 is provided such that at least a part of the groove portion 13a intersects the circular outer peripheral edge of the through-hole 12a formed on the inner peripheral surface of the outer sleeve 12 when the mold wheel 11 is assembled.

[0055] In addition, in the present invention, the form of the concave portion provided on the outer peripheral surface of the inner sleeve 13 is not limited to the linear groove portion 13a as in the present embodiment. The concave portion of the present invention includes, for example, a groove portion bent into a sawtooth shape, a recessed portion formed by recessing in a three-dimensional shape such as a rectangular parallelepiped with respect to the outer peripheral surface of the inner sleeve. In addition, in the present invention, the methods and means for manufacturing the outer sleeve 12 and the inner sleeve 13 are not particularly limited.

[0056] The resin supply unit 16 of the primary forming device 10 has a supply main body portion 17 and a supply nozzle portion 20 connected to the top end portion of the supply main body portion 17. A flow path 17a for causing the molten synthetic resin to flow toward the supply nozzle portion 20 is formed in the supply main body portion 17.

[0057] As Figure 2 shown, the supply nozzle portion 20 has: a nozzle main body portion 21 made of metal, which has a supply port 21a for ejecting synthetic resin; and a heater portion 23, which is installed on the nozzle main body portion 21. The nozzle main body portion 21 is formed of a metal having a thermal conductivity of 100 W / m·K or less, preferably 70 W / m·K or less. For example, in the present embodiment, for the material of the nozzle main body portion 21, steel (iron and steel) or stainless steel can be preferably used.

[0058] The supply port 21a of the supply nozzle part 20 is provided on the top surface (front end surface) 21b of the supply nozzle part 20. In addition, when observing the supply nozzle part 20 from the front in the front view, the supply port 21a is opened in a rectangular shape that is longer in the orthogonal direction CD. The top surface 21b of the supply nozzle part 20 is formed as a facing surface that is disposed opposite to the outer peripheral surface of the die wheel 11, and is formed as a curved surface that is slightly curved backward in the concave shape with respect to the vertical direction. Here, the front-rear direction of the supply nozzle part 20 refers to the direction along which the molten synthetic resin flows toward the supply port 21a within the supply nozzle part 20. In this case, the front in the front-rear direction is the downstream side of the flow of the synthetic resin, and the rear is the upstream side of the flow of the synthetic resin. In addition, in the present invention, the shape, size, number of settings, etc. of the supply port 21a provided in the supply nozzle part 20 are not limited and can be changed.

[0059] In the nozzle main body part 21 of the present embodiment, a guiding path 21c for guiding the synthetic resin flowing from the supply main body part 17 to the supply port 21a and three heater accommodating parts 22 for accommodating the heater part 23 are provided. In addition, the heater accommodating part 22 has a first heater accommodating part 22a formed along the orthogonal direction CD and a pair of left and right second heater accommodating parts 22b formed along the vertical direction. By providing such a heater accommodating part 22, at least a part of each heater part 23 can be arranged within the nozzle main body part 21. Thus, the nozzle main body part 21 can be efficiently heated by the heater part 23.

[0060] The heater part 23 of the supply nozzle part 20 has: an orthogonal heater part 23a that is accommodated in the first heater accommodating part 22a and is arranged along the orthogonal direction CD; and a pair of left and right side heater parts 23b that are accommodated in the second heater accommodating part 22b and are arranged along the vertical direction. In the present embodiment, the orthogonal heater part 23a and the pair of side heater parts 23b are formed of cylindrical heaters. In addition, the orthogonal heater part 23a and the pair of side heater parts 23b are respectively connected to the temperature control part and can be heated at the temperature set by the temperature control part.

[0061] The orthogonal heater part 23a is linearly arranged at the central part in the vertical direction of the nozzle main body part 21 along the orthogonal direction CD. In addition, the orthogonal heater part 23a is formed to be longer than the supply port 21a in the orthogonal direction CD and extends to a position outside the orthogonal direction CD with respect to the positions of the left and right side wall surfaces of the supply port 21a. Thus, the orthogonal heater part 23a can heat the nozzle main body part 21 in the entire or substantially the entire orthogonal direction CD (width direction).

[0062] A pair of left and right side heater parts 23b are linearly arranged along the up-down direction at the left and right side edge parts (nozzle side edge parts) of the nozzle main body part 21. More specifically, each of the left and right side heater parts 23b is arranged at a position outside and close to the supply port 21a of the supply nozzle part 20 in the orthogonal direction CD. In this case, each side heater part 23b is arranged in a manner slightly separated from the supply port 21a of the supply nozzle part 20 and the guiding path 21c. In addition, each side heater part 23b is arranged at a position close to the top surface 21b of the supply nozzle part 20 in a manner separated from the top surface 21b of the supply nozzle part 20 in the front-rear direction. And each side heater part 23b is arranged in the whole or substantially the whole up-down direction of the nozzle main body part 21. Thus, each of the left and right side heater parts 23b can partially or locally heat the top surface 21b of the nozzle main body part 21 and the left and right nozzle side edge parts in its vicinity.

[0063] By providing such left and right side heater parts 23b, in the primary forming process, the nozzle side second forming part 27 of the nozzle main body part 21 to be described later can be heated to a temperature higher than that of the nozzle side first forming part 26 of the supply nozzle part 20 to be described later (refer to Figure 3 ). In addition, in the present invention, the supply nozzle part may also be formed such that only one of the left and right side heater parts is provided on the nozzle main body part.

[0064] In addition, in the present invention, the method and means for heating the nozzle main body part are not particularly limited. For example, the heater part of the supply nozzle part may also be formed not to be provided inside the nozzle main body part but outside the nozzle main body part to heat the nozzle main body part from the outside. In addition, as the heater part, as long as it can heat the nozzle main body part, it may be formed of a heating component other than the above-mentioned cylindrical heater.

[0065] The pick-up roller 18 of the primary forming device 10 has a pair of upper clamping rollers 18a and lower clamping rollers 18b that sandwich and pull the primary formed body 60 formed on the outer peripheral surface of the die wheel 11 from above and below. An unillustrated surface layer formed of an elastic body such as a polyurethane elastic body is provided on the outer peripheral surfaces of the upper clamping roller 18a and the lower clamping roller 18b respectively.

[0066] The heating and pressing device 30 has a pair of upper and lower pressing rollers (calendering rollers) 31, 32 arranged on the downstream side of the pick-up roller 18. The upper pressing roller 31 and the lower pressing roller 32 are arranged opposite to each other at a predetermined interval. The interval between the upper pressing roller 31 and the lower pressing roller 32 can be adjusted by an unillustrated height adjusting component.

[0067] The upper pressing roller 31 is provided with a heat source (not shown) inside. The surface temperature of the upper pressing roller 31 is set to a temperature that can soften the synthetic resin forming the hook-and-loop fastener 50. In addition, in the present invention, as long as the heating and pressing device can press at least a part of the formed body 50 once as described later to form the engaging element 72, its structure is not particularly limited.

[0068] Next, a manufacturing method of manufacturing the hook-and-loop fastener 50 using the manufacturing apparatus 1 having the above-described primary forming apparatus 10 and heating and pressing apparatus 30 will be described.

[0069] The manufacturing method of the hook-and-loop fastener 50 in the present embodiment includes: a primary forming step of forming the primary formed body 60 shown by using the primary forming apparatus 10; and forming by locally deforming the primary formed body 60 by using the heating and pressing apparatus 30 Figure 5 the secondary forming step of the plurality of engaging elements 52 shown by Figure 6 and Figure 7 shown.

[0070] In the primary forming step, the molten synthetic resin is ejected from the supply port 21a of the supply nozzle portion 20 of the resin supply portion 16, and thus the synthetic resin is continuously supplied from the supply nozzle portion 20 toward the outer peripheral surface of the mold wheel 11. In the case of the present embodiment, as the synthetic resin forming the hook-and-loop fastener 50, polypropylene can be used. In addition, in the present invention, the type of the synthetic resin forming the hook-and-loop fastener is not limited, and as the material of the hook-and-loop fastener, thermoplastic resins such as polypropylene, polyester, nylon, polybutylene terephthalate, or their copolymers can be adopted.

[0071] At this time, in order to fill the molten synthetic resin into the through holes 12a of the outer sleeve 12 provided in the mold wheel 11 and flow into the groove portion 13a provided in the inner sleeve 13, the synthetic resin is supplied from the supply port 21a of the supply nozzle portion 20 toward the mold wheel 11 in an extrusion manner. Therefore, the synthetic resin extruded from the supply port 21a of the supply nozzle portion 20 oozes out to the outside in the left-right direction from the size of the supply port 21a of the supply nozzle portion 20 (in other words, in a manner of expanding to a range outside the left and right side edges of the supply port 21a in the left-right direction) and flows between the top end surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the mold wheel 11.

[0072] As described above, by supplying the molten synthetic resin from the supply nozzle portion 20 toward the mold wheel 11, a thin plate-shaped base portion 51 is formed between the curved top end surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the mold wheel 11 (that is, the outer peripheral surface of the outer sleeve 12) (refer to Figure 3)。At this time, the base portion 51 is formed such that the dimension in the left-right direction (width dimension) is larger than the supply port 21a of the supply nozzle portion 20. Further, a plurality of primary elements (temporary elements) 62 are formed on the base portion 51 in a manner integral with and protruding from the base portion 51 by the outer sleeve 12 and the inner sleeve 13 of the die wheel 11.

[0073] Moreover, in the supply nozzle portion 20 of the present embodiment, the nozzle main body portion 21 is heated by the orthogonal heater portion 23a over the entire or substantially the entire width direction. In addition, the left and right nozzle side edge portions of the nozzle main body portion 21 are locally heated by the left and right side heater portions 23b. Here, at the nozzle side edge portion of the nozzle main body portion 21, preferably, in the left-right direction of the supply nozzle portion 20, it includes at least the nozzle side second forming portion 27 of the supply nozzle portion 20 to be described later, and includes the positions where the left and right side edges of the supply port 21a of the supply nozzle portion 20 are formed.

[0074] In the present embodiment, regarding the base portion 51 formed between the die wheel 11 and the supply nozzle portion 20, the portion of the base portion 51 disposed at the central portion in the orthogonal direction CD is defined as the base central portion 51a, and the portions of the base portion 51 disposed at both end portions in the orthogonal direction CD are defined as the base side edge portions 51b (see Figure 3 ). In this case, the base portion 51 has a pair of left and right base side edge portions 51b.

[0075] Further, as Figure 3 shown, the top surface 21b of the supply nozzle portion 20 (nozzle main body portion 21) and the portion near it that forms the base central portion 51a of the base portion 51 together with the die wheel 11 are defined as the nozzle side first forming portion 26, and the portion that forms the base side edge portion 51b of the base portion 51 together with the die wheel 11 is defined as the nozzle side second forming portion 27. And the outer peripheral surface of the die wheel 11 and the portion near it that forms the base central portion 51a of the base portion 51 together with the supply nozzle portion 20 are defined as the wheel side first forming portion 28, and the portion that forms the base side edge portion 51b of the base portion 51 together with the supply nozzle portion 20 is defined as the wheel side second forming portion 29.

[0076] In this case, in the supply nozzle portion 20 of the present embodiment, by locally heating the left and right nozzle side edge portions of the nozzle main body portion 21 including the nozzle side second forming portion 27 by using the side heater portion 23b provided on the nozzle main body portion 21, the temperature of the supply nozzle portion 20 can be varied in the orthogonal direction CD.

[0077] As a result, it is possible to intentionally create a temperature difference between two different positions in the orthogonal direction CD of the supply nozzle portion 20, for example, between the position of the near-side heater portion 23b and the position of the far-side heater portion 23b in the orthogonal direction CD. Further, in the present embodiment, the nozzle main body portion 21 of the supply nozzle portion 20 is formed of a metal having a relatively small thermal conductivity of 100 W / m·K or less as described above, so that heat is difficult to transfer within the nozzle main body portion 21, and thus it is possible to more easily create a temperature difference in the orthogonal direction CD. Therefore, when forming the base portion 51 using the primary forming device 10, it is possible to stably create a temperature difference in which the temperature of the nozzle-side second forming portion 27 is higher than the temperature of the nozzle-side first forming portion 26 on the top end surface 21b of the nozzle main body portion 21 and in the vicinity thereof, between the nozzle-side first forming portion 26 and the left and right nozzle-side second forming portions 27.

[0078] Here, the problems of the conventional method for manufacturing a hook-and-loop fastener will be described again. In the conventional manufacturing method, in the case where the lower part of the mold wheel is immersed in the coolant in the cooling tank while cooling the primary formed body, as described above, in the manufactured hook-and-loop fastener, the thickness of the base portion varies in the width direction (orthogonal direction CD). As a result, when the manufactured hook-and-loop fastener is wound up by the take-up roller and then the hook-and-loop fastener is pulled out from the take-up roller for use, there is a problem that undulating wrinkles are generated in the pulled-out hook-and-loop fastener. In view of such conventional problems, the present inventors have repeatedly conducted in-depth studies and as a result, have clarified the following.

[0079] That is, when forming the primary formed body 60 using the outer peripheral surface portion of the mold wheel 11, generally, for example, by Figure 3 It is understood that on the outer peripheral surface of the mold wheel 11, there are two regions: a portion covered by the base portion 51 of the primary formed body 60 and an outer portion in the orthogonal direction CD that is not covered by the base portion 51. Therefore, in the case where the primary forming process is performed while immersing the mold wheel 11 in the coolant, a part of the coolant adheres to the outer portion (the portion not covered by the base portion 51) on the outer peripheral surface of the rotating mold wheel 11. Further, the adhered coolant rotates together with the mold wheel 11 and is transported to the position of the supply nozzle portion. And the coolant that has moved to the position of the supply nozzle portion comes into contact with the nozzle-side second forming portion and the vicinity thereof on the top end surface (front end surface) of the supply nozzle portion.

[0080] In the conventional manufacturing method, as described above, the cooling water in the cooling tank adheres to or contacts the outer side portion in the orthogonal direction of the outer peripheral surface of the die wheel, the nozzle-side second forming portion on the top surface of the supply nozzle portion, and the vicinity thereof. As a result, the temperature of the portion where the cooling water adheres to or contacts is lowered. It is known that a thermal expansion difference is generated between the portion where the cooling water adheres to or contacts and the portion where the cooling water does not adhere to or contact in the supply nozzle portion and the die wheel (i.e., between the portions having different positions in the orthogonal direction CD). Therefore, in the conventional primary forming process, a phenomenon occurs in which the interval between the top surface of the supply nozzle portion and the outer peripheral surface of the die wheel changes in the orthogonal direction due to the thermal expansion difference. That is, it is known that the change in the interval between the supply nozzle portion and the die wheel caused by the thermal expansion difference is one of the reasons for the change in the thickness of the base portion in the width direction (orthogonal direction).

[0081] In view of such a conventional problem, in the present embodiment, a side heater portion 23b is provided in the supply nozzle portion 20. In the primary forming process, the left and right nozzle-side second forming portions 27 and the vicinity thereof of the nozzle main body portion 21 are heated by the side heater portion 23b. Thus, as described above, a temperature difference is actively formed between the nozzle-side second forming portion 27 and the nozzle-side first forming portion 26 such that the temperature of the nozzle-side second forming portion 27 is higher than the temperature of the nozzle-side first forming portion 26 on the top surface 21b of the nozzle main body portion 21 and in the vicinity thereof.

[0082] In particular, in the case of the present embodiment, a temperature difference of 20°C or more is formed between the temperature of the nozzle-side first forming portion 26 heated by the heater portion 23 and the temperatures of the left and right nozzle-side second forming portions 27. In addition, the temperatures of the nozzle-side first forming portion 26 and the nozzle-side second forming portion 27 respectively represent the temperatures actually measured for these portions using a temperature sensor or the like.

[0083] By forming the above temperature difference in the nozzle main body portion 21, the nozzle-side second forming portion 27 can expand more than the nozzle-side first forming portion 26. Therefore, in the primary forming process, even if the coolant adheres to or contacts the outer side portion in the orthogonal direction CD of the outer peripheral surface of the die wheel 11, the nozzle-side second forming portion 27 on the top surface 21b of the supply nozzle portion 20, and the vicinity thereof, the interval D between the top surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the die wheel 11 can be suppressed from changing in the orthogonal direction CD.

[0084] In addition, in the present invention, the magnitude of the temperature difference provided between the first forming portion 26 on the nozzle side and the second forming portion 27 on the nozzle side of the nozzle body portion 21 in order to suppress the change of the interval D in the orthogonal direction CD is not particularly limited, and for example, an appropriate temperature difference can be set corresponding to the shape and size of the nozzle body portion 21, the material of the nozzle body portion 21, and the like. For example, in the case of the present embodiment, by forming a temperature difference of 20°C or more as described above, the change of the interval D in the orthogonal direction CD can be effectively suppressed. In addition, the temperature difference provided between the first forming portion 26 on the nozzle side and the second forming portions 27 on the left and right nozzle sides is preferably 35°C or less. Thereby, it is possible to suppress the change of the interval D between the top surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the mold wheel 11 in the orthogonal direction CD due to the excessive expansion of the second forming portion 27 on the nozzle side of the supply nozzle portion 20 caused by the heating of the side heater portion 23b.

[0085] Therefore, in the primary forming process of the present embodiment, by using the primary forming device 10 having a temperature difference in the orthogonal direction CD in the nozzle body portion 21 of the supply nozzle portion 20, it is possible to stably form a thin plate-shaped base portion 51 having a small thickness change in the orthogonal direction CD (width direction) and a plurality of primary elements (temporary elements) 62 integrally formed with the base portion 51 and protruding from the upper surface of the base portion 51. Figure 5 as shown in the primary formed body 60.

[0086] In this case, the plurality of primary elements 62 formed in the primary formed body 60 are parts that are respectively deformed into the engaging elements 52 by performing secondary forming (press forming) in the secondary forming process. In the present embodiment, the plurality of primary elements 62 are regularly arranged in a lattice-shaped arrangement pattern along the machine direction MD and the orthogonal direction CD on the upper surface of the base portion 51. In this case, element rows 67 are formed by arranging the primary elements 62 at a certain interval (spacing) along the machine direction MD. In addition, the plurality of element rows 67 are arranged at a certain interval in the orthogonal direction CD. Therefore, the plurality of engaging elements 52 formed from the primary elements 62 are also regularly arranged in a lattice-shaped arrangement pattern.

[0087] In addition, in the present invention, the number of primary elements and engaging elements provided, the size (thickness and height), the arrangement pattern, the formation density, and the like are not particularly limited and can be changed. For example, the primary elements or the engaging elements may also be arranged in a zigzag arrangement pattern in which they are staggered by a size of 1 / 2 pitch in the machine direction MD between adjacent element rows along the orthogonal direction and are alternately or arranged in a zigzag shape.

[0088] In the present embodiment, each primary element 62 has: a frustum-shaped primary rod portion 63 that stands up from the base portion 51; a rod-shaped rib portion 64 that bulges upward locally from the upper surface of the primary rod portion 63; and two protruding portions (primary claw portions) 65 that are integrally formed with the rib portion 64 and protrude from both end portions of the rib portion 64. In this case, the rib portion 64 and the protruding portion 65 of the primary element 62 are formed along the orthogonal direction CD (the formation direction of the groove portion 13a). In addition, the protruding portion 65 protrudes outward with respect to the upper end surface of the primary rod when the primary element 62 is viewed from above.

[0089] In the primary forming process of the present embodiment, the molten synthetic resin is cooled and solidified by the cooling tank 15 containing the coolant and the cooling jacket provided inside the rotary drive roller 14 while being carried by the outer peripheral surface of the mold wheel 11 and rotating half a turn, thereby forming the above-mentioned primary formed body 60. After that, the primary formed body 60 is continuously peeled off from the outer peripheral surface portion of the mold wheel 11 by the pickup roller 18.

[0090] Next, the primary formed body 60 peeled off from the mold wheel 11 is conveyed toward the heating and pressing device 30 for the secondary forming process and introduced between the upper pressing roller 31 and the lower pressing roller 32 of the heating and pressing device 30. In the secondary forming process, the base portion 51 of the primary formed body 60 is supported from below by the lower pressing roller 32. In addition, at least the upper end portions of the respective primary elements 62 of the primary formed body 60 are heated and softened by the upper pressing roller 31 and are pressed from above. Thus, Figure 6 and Figure 7 A plurality of engaging elements 52 as shown are integrally formed on the upper surface of the base portion 51.

[0091] Each engaging element 52 formed by the secondary forming process has: a substantially frustum-shaped rod portion 53 that stands up from the base portion 51; an engaging head portion 54 that is integrally formed at the upper end portion of the rod portion 53; and two minute claw portions (engaging claw portions) 55 that protrude outward from the outer peripheral edge portion of the engaging head portion 54. The engaging head portion 54 has a shape that expands in all directions orthogonal to the upper end portion (top end portion) of the rod portion 53. The two claw portions 55 protrude from the engaging head portion 54 along the orthogonal direction CD when the engaging element 52 is viewed from above (not shown).

[0092] Furthermore, in the present invention, the shape and size of the engaging element are not particularly limited. For example, the shape of the engaging head portion, the shape of the claw portion, the number of claw portions provided, and the protruding direction of the claw portion from the engaging head portion can be changed to form the engaging element. In addition, on one hook-and-loop fastener, a plurality of engaging elements having different shapes can also be provided.

[0093] Subsequently, the hook-and-loop tape 50 passing between the upper pressing roller 31 and the lower pressing roller 32 is sent out from the heating and pressing device 30, and is wound into a roll shape and recovered, for example, by a recovery roller or the like. Alternatively, the hook-and-loop tape 50 may be conveyed from the heating and pressing device 30 toward a cutting portion (not shown), cut into a predetermined width dimension and / or length dimension at the cutting portion, and then recovered. Further, for the hook-and-loop tape 50 sent out from the heating and pressing device 3, other processes such as a stretching process of stretching along the machine direction MD may be performed before recovering it by a recovery roller or the like.

[0094] As described above, by performing the manufacturing method of the present embodiment including the primary forming process and the secondary forming process, the Figure 6 and Figure 7 hook-and-loop tape 50 shown is manufactured.

[0095] In the hook-and-loop tape 50 manufactured by the present embodiment, as described above, compared with the case of manufacturing by the conventional manufacturing method, it is less likely to cause a change in the thickness between the upper surface and the lower surface of the base portion 51 in the width direction. Therefore, the central portion in the width direction and the left and right side edge portions in the width direction of the base portion 51 can be formed to have substantially the same thickness, and a hook-and-loop tape 50 in which the thickness of the base portion 51 is uniform or substantially uniform in the entire width direction can be obtained.

[0096] Therefore, even if the hook-and-loop tape 50 is wound around a recovery roller and held after being manufactured, it is possible to prevent or suppress the formation of an uneven shape in the base portion 51 of the wound hook-and-loop tape 50, such as a depression in the central portion in the width direction and bulges in the left and right side edge portions in the width direction, as in the past. Therefore, even if the hook-and-loop tape 50 recovered by the recovery roller is pulled out from the recovery roller later, undulating wrinkles will not occur in the left and right side edge portions of the base portion 51, and the quality and performance of the hook-and-loop tape 50 at the time of manufacturing can be stably maintained.

[0097] In addition, in the above-described embodiment, a pair of side heater portions 23b are provided in the nozzle main body portion 21 of the supply nozzle portion 20. However, in the present invention, instead of or in combination with the side heater portions 23b of the supply nozzle portion 20, a wheel heater portion for locally heating a pair of wheel-side second forming portions 29 of the mold wheel 11 may be provided, for example, on the rotation driving roller 14 of the mold wheel 11.

[0098] By providing such a wheel heater portion, it is possible to form a temperature difference (for example, a temperature difference of 20°C or more) in which the temperature of the wheel-side second forming portion 29 formed between the outer sleeve 12 and the inner sleeve 13 of the mold wheel 11, between the wheel-side first forming portion 28 and the left and right wheel-side second forming portions 29, is higher than the temperature of the wheel-side first forming portion 28 (refer to Figure 3 ).

[0099] Accordingly, it is possible to cause the second forming portion 29 on the wheel side to expand more than the first forming portion 28 on the wheel side. Therefore, even if the coolant adheres to or contacts the die wheel 11 and the supply nozzle portion 20 during the primary forming process, it is possible to suppress a change in the distance D between the top surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the die wheel 11 in the orthogonal direction CD. Thus, it is possible to manufacture the hook-and-loop fastener 50 having a thickness of the base portion 51 that is uniform or substantially uniform in the width direction.

[0100] In addition, in the case where a wheel heater portion for heating the die wheel 11 is provided, the wheel heater portion may be configured to be provided not on the above-described rotation drive roller 14 but outside the die wheel 11, whereby it is possible to heat the second forming portion 29 on the wheel side of the die wheel 11 from the outside.

[0101] Further, in the primary forming apparatus 10 of the above-described embodiment, the molten synthetic resin is supplied from the supply nozzle portion 20 toward the die wheel 11, and thus the base portion 51 is formed between the top surface 21b of the supply nozzle portion 20 and the outer peripheral surface of the die wheel 11. However, in the present invention, the primary forming apparatus may also be configured to supply the molten synthetic resin material, for example, to the gap between two die wheels arranged with their outer peripheral surfaces facing each other from the supply nozzle portion (i.e., a double-wheel structure). In this case, the base portion 51 is formed between the pair of die wheels, and the plurality of primary elements 62 are formed by the outer sleeve and the inner sleeve of one die wheel. Even in such a case, by providing a wheel heater portion for heating the second forming portion on the wheel side on one or both of the die wheels, it is possible to manufacture the hook-and-loop fastener having a thickness of the base portion that is uniform or substantially uniform in the width direction.

[0102] Moreover, in the above-described embodiment, the cooling groove 15 is provided below the die wheel 11. In order to suppress a change in the thickness of the base portion 51 caused by the cooling water in the cooling groove 15, a pair of side heater portions 23b are provided in the supply nozzle portion 20. However, the present invention is similarly applicable to the case where the hook-and-loop fastener is manufactured by forming the primary formed body without providing the cooling groove 15.

[0103] For example, when forming the primary formed body 60 using a modified primary forming device having a structure obtained by omitting the cooling tank 15 from the primary forming device 10 of the above-described embodiment, a thermal expansion difference may occur between a portion covered by the base portion 51 and an outer portion not covered by the base portion 51 on the outer peripheral surface of the die wheel due to air cooling. In addition, on the top surface of the supply nozzle portion, a thermal expansion difference may occur between the nozzle-side second forming portion and the nozzle-side first forming portion due to air cooling the nozzle-side second forming portion from the outer side in the width direction. Therefore, even in the modified primary forming device not having the cooling tank 15, by providing a side heater portion in the supply nozzle portion and / or a wheel heater portion in the die wheel, the thickness change in the width direction of the base portion 51 of the hook-and-loop fastener 50 is less likely to occur, and the thickness of the base portion 51 can be made uniform.

[0104] In addition, in the above-described embodiment, the hook-and-loop fastener 50 is manufactured by performing a primary forming process using the primary forming device 10 and a secondary forming process using the heating and pressing device 30. However, in the present invention, for example, it may also be possible to manufacture the hook-and-loop fastener 50 without performing the secondary forming process of the above-described embodiment by performing a forming process using a forming device having a cavity capable of forming the engaging element 52 including the rod portion 53 and the engaging head portion 54 provided in the die wheel.

[0105] Description of Reference Numerals

[0106] 1. Manufacturing device; 10. Primary forming device; 11. Die wheel; 12. Outer sleeve (outer cylindrical body); 12a. Through hole; 13. Inner sleeve (inner cylindrical body); 13a. Groove portion; 14. Rotation drive roller; 15. Cooling tank; 16. Resin supply unit; 17. Supply main body portion; 17a. Flow path; 18. Pickup roller; 18a. Upper clamping roller; 18b. Lower clamping roller; 20. Supply nozzle portion; 21. Nozzle main body portion; 21a. Supply port; 21b. Top surface (front end surface); 21c. Guide path; 22. Heater housing portion; 22a. First heater housing portion; 22b. Second heater housing portion; 23. Heater portion; 23a. Orthogonal heater portion; 23b. Side heater portion; 26. Nozzle side first forming portion; 27. Nozzle side second forming portion; 28. Wheel side first forming portion; 29. Wheel side second forming portion; 30. Heating and pressing device (secondary forming device); 31. Upper pressing roller (calendering roller); 32. Lower pressing roller (calendering roller); 50. Hook and loop fastener; 51. Base portion; 51a. Central base portion; 51b. Base side edge portion; 52. Engaging element; 53. Rod portion; 54. Engaging head portion; 55. Claw portion (engaging claw portion); 60. Primary formed body; 62. Primary element (temporary element); 63. Primary rod portion; 64. Rib portion; 65. Protrusion (primary claw portion); 67. Element row; D. Interval between the top surface of the supply nozzle portion and the outer peripheral surface of the die wheel; CD. Orthogonal direction; MD. Machine direction.

Claims

1. A method for manufacturing a hook-and-loop fastener, which is a method for manufacturing a hook-and-loop fastener (50) made of synthetic resin. The hook-and-loop fastener (50) has a base portion (51) elongated in the machine direction (MD) and a plurality of engaging elements (52) provided on the base portion (51). The base portion (51) includes a base center portion (51a) disposed at the center of the base portion (51) in the cross direction (CD) orthogonal to the machine direction (MD) and a pair of base side edge portions (51b) disposed at both ends of the base portion (51) in the cross direction (CD). The method for manufacturing the hook-and-loop fastener (50) is characterized in that the method for manufacturing the hook-and-loop fastener (50) includes a forming process. In this forming process, at least the base portion (51) is formed by supplying molten synthetic resin from a supply nozzle portion (20) toward a mold wheel (11) rotating in one direction. The forming process includes: forming the base portion (51) in a state where a temperature difference is provided between at least two different positions in the cross direction (CD) of at least one of the supply nozzle portion (20) and the mold wheel (11) by heating with a heater portion (23).

2. The method for manufacturing a hook-and-loop fastener according to claim 1, wherein the forming process includes: forming the base portion (51) between the outer peripheral surface of the mold wheel (11) and the opposing surface (21b) of the supply nozzle portion (20) facing the mold wheel (11), and providing a temperature difference such that the temperature of at least one of the pair of nozzle-side second forming portions (27) of the supply nozzle portion (20) for forming the pair of base side edge portions (51b) of the base portion (51) is higher than the temperature of the nozzle-side first forming portion (26) of the supply nozzle portion (20) for forming the base center portion (51a) of the base portion (51).

3. The method for manufacturing a hook-and-loop fastener according to claim 1, wherein the forming process includes: forming the base portion (51) between the outer peripheral surface of the mold wheel (11) and the opposing surface (21b) of the supply nozzle portion (20) facing the mold wheel (11), and providing a temperature difference such that the temperature of at least one of the pair of wheel-side second forming portions (29) of the mold wheel (11) for forming the pair of base side edge portions (51b) of the base portion (51) is higher than the temperature of the wheel-side first forming portion (28) of the mold wheel (11) for forming the base center portion (51a) of the base portion (51).

4. The method for manufacturing a hook-and-loop fastener according to any one of claims 1 to 3, wherein the method for manufacturing the hook-and-loop fastener includes making the temperature difference 20 °C or more.

5. A forming device (10) for manufacturing a hook-and-loop fastener (50) made of synthetic resin. The hook-and-loop fastener (50) made of synthetic resin has a base portion (51) elongated in the machine direction (MD) and a plurality of engaging elements (52) provided on the base portion (51). The base portion (51) includes a base center portion (51a) disposed at the center of the base portion (51) in the cross direction (CD) orthogonal to the machine direction (MD), and a pair of base side edge portions (51b) disposed at both ends of the base portion (51) in the cross direction (CD). The forming device (10) at least forms the base portion (51). The forming device (10) is characterized in that, the forming device (10) includes: a mold wheel (11) that rotates in one direction; a supply nozzle portion (20) that supplies molten synthetic resin toward the mold wheel (11); and a heater portion (23) that heats the supply nozzle portion (20) and / or the mold wheel (11), the supply nozzle portion (20) includes: a first nozzle-side forming portion (26) that forms the base center portion (51a) of the base portion (51); and a pair of second nozzle-side forming portions (27) that form the pair of base side edge portions (51b) of the base portion (51), the mold wheel (11) includes: a first wheel-side forming portion (28) that forms the base center portion (51a) of the base portion (51); and a pair of second wheel-side forming portions (29) that form the pair of base side edge portions (51b) of the base portion (51), the heater portion (23) locally heats at least one of the pair of second nozzle-side forming portions (27) in the supply nozzle portion (20) and / or at least one of the pair of second wheel-side forming portions (29) in the mold wheel (11).

6. The forming device according to claim 5, wherein, the mold wheel (11) and the supply nozzle portion (20) have a structure for forming the base portion (51) between the outer peripheral surface of the mold wheel (11) and the opposing surface (21b) of the supply nozzle portion (20) that faces the mold wheel (11), the heater portion (23) includes a pair of side heater portions (23b) that respectively heat the pair of second nozzle-side forming portions (27).

7. The forming device according to claim 6, wherein, at least a part of the side heater portion (23b) is disposed inside the supply nozzle portion (20).

8. The forming device according to any one of claims 5 to 7, wherein, the supply nozzle portion (20) is formed of a metal having a thermal conductivity of 100 W / m·K or less.

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