JP2005349119A - Manufacturing method of shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a shoe shortening a heating time and, as for embossing to a sole, improving embossment of a pattern. <P>SOLUTION: This manufacturing method of the shoe is characterized in that, after a thermoplastic thin film as an outsole having a lower face and a circumferential face extending along the circumferential edge of the lower face and forming a filling space is heated to be softened, the softened thermoplastic thin film, an upper having two upper/lower openings and a circumferential face formed by extending between opening edges of the upper/lower openings, and a filler as a midsole having a shape fitted to the filling space to fill the filling space are connected together. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a shoe, and more particularly to a method for manufacturing a shoe having a sole having a certain thickness.

  As shown in FIG. 1, the conventional shoe manufacturing method first heats and softens the midsole blank 1 made of a thermoplastic material, and then the softened midsole blank 1 together with the upper 2 and the outsole 3. The pattern can be embossed on the outer peripheral surface of the midsole blank 1 by the mold set 4 by applying pressure while putting it in the mold set 4 and heating. However, in this manufacturing method, since the midsole blank 1 must be heated before being put into the mold set 4, in the case of a midsole having a certain thickness, the heating time becomes long. Since the shrinkage rate due to heating is unstable, when the heated midsole blank 1 is put into the mold set 4, the midsole blank 1 is pressed evenly by the mold set 4 without being closely aligned with the mold set 4. I can't. Therefore, the entire shoe is not well connected, the appearance is not as expected, the joints at the periphery are not neat, and the embossed pattern on the midsole blank 1 is not well raised. There is.

  In view of the above, it is an object of the present invention to provide a method for manufacturing a shoe that shortens the heating time and can be embossed on the sole with a good pattern raised.

  In order to achieve the above object, the present invention heats and softens a thermoplastic thin film as an outsole having a lower surface and a peripheral surface extending along the periphery of the lower surface to form a filling space. After the softening, the softened thermoplastic thin film, the upper and lower two openings, the upper having a peripheral surface extending between the opening edges of the upper and lower two openings, and the shape combined with the filling space There is provided a method for manufacturing a shoe, characterized in that it is combined with a filler as a midsole that can be inserted into the filling space.

  According to the shoe manufacturing method of the present invention, the midsole having a certain thickness is not heated and softened as in the prior art, but the thermoplastic thin film as an outsole is heated and softened. Since the filling material is put into the filling space, the heating time can be shortened compared to the conventional case, and the embossed surface can be easily embossed on the peripheral surface of the thermoplastic thin film.

  In addition, before the thermoplastic thin film, the upper, and the filler are bonded, it is preferable that the insole is connected to the lower opening edge of the upper so as to shield the lower opening of the upper. In this case, as a method of joining the thermoplastic thin film, the upper, and the filler, an adhesive is applied to the lower opening edge and outer peripheral surface of the upper, the lower surface of the insole, and the lower surface and outer peripheral surface of the filler. After the coating, the thermoplastic thin film and the upper are put into the filling space and the mold setting process for putting in the mold set is performed, and then the mold is clamped and heated and pressurized. By doing.

  In addition, as a method of bonding the thermoplastic thin film, the upper, and the filler, in addition, an adhesive is applied to the outer peripheral surface of the upper, and then the thermoplastic thin film and the upper are attached to a metal with a support block. After putting into the mold set and performing the mold setting process to put the support block in the filling space, after clamping and heating and pressurizing, the thermoplastic thin film and the upper are combined, and then The mold is opened and the filler is placed in the filling space. In this case, it is preferable that the insole and the upper be connected after the thermoplastic thin film, the upper, and the filler are bonded.

  Further, since the present invention heats only the thermoplastic thin film as the outsole, as the filler, for example, a waste suitable for a midsole such as rubber, PU, EVA, wood chips, rice husks is recovered and used. , Waste pollution can be reduced.

  Moreover, it is preferable to use what selects at least one from the group which consists of EVA, TPU, and TPR as said thermoplastic thin film.

  Further, in the mold setting step, it is preferable that a wear-resistant layer is previously placed in the mold set and laid on the bottom surface in the mold before the thermoplastic thin film is put in the mold set. . Thereby, the abrasion resistance of the outsole can be reinforced.

  Further, it is preferable that a fitting structure is formed in advance between the bottom surface of the filler and the upper surface of the thermoplastic thin film, and at the same time, they are fitted by the fitting structure. Thereby, the bond between the filler and the thermoplastic thin film becomes stronger, and it is possible to avoid peeling due to deformation by pressure from the foot or other stress.

  Hereinafter, a preferred embodiment of a method for manufacturing a shoe of the present invention will be described with reference to the drawings.

  First, a first embodiment of the shoe manufacturing method of the present invention will be described with reference to FIGS. FIG. 2 is a flowchart showing the flow of the first embodiment of the shoe manufacturing method of the present invention. FIG. 3 is a cross-sectional view showing a state in which the upper, the thermoplastic thin film, and the filler in the first embodiment are combined in a mold set. FIG. 4 is a side sectional view of a shoe manufactured by the shoe manufacturing method of the first embodiment.

  First, as shown in FIGS. 2 and 3, an upper 10 having upper and lower two openings 11 and 12 and a peripheral surface 13 extending between the opening edges of the upper and lower two openings 11 and 12, and a sole 20 And prepare. The sole 20 has a lower surface 211, a thermoplastic thin film 21 as an outsole that extends upward along the periphery of the lower surface 211 and forms a filling space 212 (FIG. 7), and a filling space 212. A filler 22 as a midsole that can be put into the filling space 212 with a combined shape, and an insole 23 are prepared. In the present embodiment, the insole 23 is previously sewn to the lower opening edge of the upper 10 so as to shield the lower opening 12 of the upper 10.

  And the thermoplastic thin film 21 is comprised from EVA. The filler 22 is made of, for example, collected and used waste suitable for a midsole such as rubber, PU, EVA, wood chips, rice husks, and the like. In the present embodiment, as shown in FIG. 4, the filler 22 includes a toe portion 221 and a flange portion 222, and the toe portion 221 and the flange portion 222 are made of materials having different hardnesses, and the flange portion 222. The damping effect can be improved.

  Then, a strip-shaped thin film protective layer 30 is pasted immediately above the portion of the peripheral surface 13 of the upper 10 that is covered by the peripheral surface 213 of the thermoplastic thin film 21.

  Subsequently, the thermoplastic thin film 21 is heated and softened.

  Thereafter, the thermoplastic thin film 21, the upper 10, and the filler 22 are bonded. Hereinafter, a method of bonding the thermoplastic thin film 21, the upper 10, and the filler 22 will be described. First, an adhesive is applied to the lower opening edge and outer peripheral surface 131 of the upper 10, the lower surface 231 of the insole 23, and the lower surface and outer peripheral surface of the filler 22.

  Then, a mold setting process is performed. In this embodiment, the mold set 40 includes a shoe mold 41, a lower mold 42 that faces the shoe mold 41, and two side molds 43 that face each other. In the mold setting process, the thermoplastic thin film 21 and the upper 10 are put into the filling space 212 and the lower mold 42 and the side mold 43 of the mold set 40 and the shoe mold 41 are put into the mold set 40, respectively. .

  Subsequently, the outer peripheral surface 214 of the thermoplastic thin film 21 is embossed and bonded to the peripheral surface 13 of the upper 10 while being heated while being clamped and heated, and the inner peripheral surface 215 of the thermoplastic thin film 21 is also bonded. And the top surface 216 can be coupled to the filler 22.

  Thereafter, after the mold set 40 is cooled, the molded shoes are taken out from the mold set 40. Finally, the excess portion of the thermoplastic thin film 21 that protrudes from the mold set 40 and adheres to the thin film protective layer 30 is cut during the molding process, and then peeled off from the peripheral surface 13 of the upper 10 together with the thin film protective layer 30.

  Since the shoe manufactured in this way is bonded to the upper 10 and the filler 22 after heating and softening the thermoplastic thin film 21 as the outsole, the heating time can be shortened compared to the conventional case. A pattern may be raised on the peripheral surface 213 of the thermoplastic thin film 21.

  Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 5, the present embodiment is different from the first embodiment in that the mold setting step is performed in advance before the thermoplastic thin film 21 is put into the mold set 40. Is to be laid on the lower mold 42 of the mold set 40. Thereby, the abrasion resistant layer 70 can be combined with the thermoplastic thin film 21 to reinforce the abrasion resistance of the outsole.

  Next, a third embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The difference of the present embodiment from the first embodiment resides in a method of joining the thermoplastic thin film, the upper, and the filler, and the connection between the insole and the upper.

  More specifically, as shown in FIGS. 6 and 7, the method of bonding the thermoplastic thin film 21, the upper 10, and the filler 22 is performed by applying an adhesive to the outer peripheral surface 13 of the upper 10, and then performing thermoplasticity. Mold setting step of placing the thin film 21 and the upper 10 into the lower mold 42 of the mold set 40 and the shoe mold 41 having the side mold 43 and the support block 411 and inserting the support block 411 into the filling space 212, respectively. After the mold is clamped and heated / pressurized, the thermoplastic thin film 21 and the upper 10 are joined, then the mold is opened, and the filler 22 is inserted into the filling space 212 from the upper opening 11 of the upper 10. To do. 8 and 9, a plurality of concave grooves 223 are formed in advance on the bottom surface of the filler 22, and a plurality of protrusions 217 are formed in advance on the top surface of the thermoplastic thin film 21, so that the filler 22 and the thermoplastic At the same time as bonding the thin film 21, the filler 22 and the thermoplastic thin film 21 are bonded by fitting the protrusion 217 into the concave groove 223.

  After the thermoplastic thin film 21, the upper 10 and the filler 22 are bonded, the insole 23 is connected to the lower opening edge of the upper 10 and the upper surface of the filler 22 so as to shield the lower opening 12 of the upper 10. .

  Next, a fourth embodiment of the present invention will be described. As shown in FIG. 10, this embodiment is different from the third embodiment in that the lower opening edge of the upper 10 is extended to the support block 411 so as to be put in the filling space 212 together with the support block 411. .

  As can be seen from the above-described embodiments, the shoe manufacturing method of the present invention does not heat and soften the midsole of a certain thickness as in the prior art, but heats the thermoplastic thin film as an outsole. In addition, since the filling material as a midsole is placed in the filling space, the heating time can be shortened compared to the conventional case, and the embossed surface can be easily embossed on the peripheral surface of the thermoplastic thin film. , The embossed pattern is also good.

  In addition, since the present invention heats only the thermoplastic thin film as the outsole, as the filler, for example, a waste suitable for a midsole such as rubber, PU, EVA, wood chips, rice husks is recovered and used. , Waste pollution can be reduced.

  The present invention is particularly applicable to the manufacture of shoes having a certain thickness of sole, such as thick sole shoes and high heels.

Explanatory drawing which shows the manufacturing method of the conventional shoes The flowchart which shows the flow of 1st Embodiment of the manufacturing method of the shoes of this invention. Sectional drawing which shows the state which couple | bonded the upper in the said 1st Embodiment, a thermoplastic thin film, and a filler in the metal mold | die set. Side sectional view of a shoe manufactured by the shoe manufacturing method of the first embodiment. Sectional drawing which shows the state which couple | bonded the upper in the 2nd Embodiment of this invention, a thermoplastic thin film, a filler, and a wear-resistant layer in the metal mold | die set. The flowchart which shows the flow of 3rd Embodiment of the manufacturing method of the shoes of this invention. Sectional drawing which shows the state which couple | bonded the upper and thermoplastic thin film in the said 2nd Embodiment in the metal mold | die set. Side sectional view of a shoe manufactured by the shoe manufacturing method of the second embodiment. 9-9 sectional view of FIG. Sectional drawing which shows the state which couple | bonded the upper and thermoplastic thin film in the 4th Embodiment of this invention in the metal mold | die set

Explanation of symbols

10 upper 11 upper opening 12 lower opening 13 peripheral surface 131 outer peripheral surface 20 sole 21 thermoplastic thin film 211 lower surface 212 filling space 213 peripheral surface 214 outer peripheral surface 215 inner peripheral surface 216 upper surface 217 protrusion 22 filling material 221 toe portion 222 flange 223 concave Groove 23 Insole 231 Lower surface 30 Thin film protective layer 40 Mold set 41 Shoe mold 411 Support block 42 Lower mold 43 Side mold 70 Wear resistant layer

Claims (7)

  Heating and softening a thermoplastic thin film as an outsole having a lower surface and a peripheral surface extending along the peripheral edge of the lower surface to form a filling space, and then the softened thermoplastic thin film And an upper having two upper and lower openings and a peripheral surface extending between the opening edges of the upper and lower two openings, and a shape combined with the filling space, can be put into the filling space A method for manufacturing a shoe, wherein the shoe is combined with a filler as a midsole. Before bonding the thermoplastic thin film, the upper and the filler, an insole is connected to the lower opening edge of the upper so as to shield the lower opening of the upper,
As a method of bonding the thermoplastic thin film, the upper, and the filler, an adhesive is applied to the lower opening edge and outer peripheral surface of the upper, the lower surface of the insole, and the lower surface and outer peripheral surface of the filler. Then, the thermoplastic thin film and the upper are formed by putting the filler into the filling space and performing a mold setting process for putting the filler into the mold set, and then clamping and heating and pressurizing. The method for manufacturing a shoe according to claim 1. As a method of bonding the thermoplastic thin film, the upper, and the filler, an adhesive is applied to the outer peripheral surface of the upper, and then the thermoplastic thin film and the upper are placed in a mold set with a support block. In addition, after performing a mold setting process for placing the support block in the filling space and then heating and pressurizing the mold, the thermoplastic thin film and the upper are combined, and then the mold is opened and the mold is opened. By placing a filler in the filling space,
After the thermoplastic thin film, the upper, and the filler are bonded, the insole is connected to the lower opening edge of the upper and the upper surface of the filler so as to shield the lower opening of the upper. The method for manufacturing a shoe according to claim 1.   The method for manufacturing a shoe according to any one of claims 1 to 3, wherein a waste suitable for a midsole is collected and used as the filler.   The method for manufacturing a shoe according to any one of claims 1 to 3, wherein the thermoplastic thin film is selected from at least one selected from the group consisting of EVA, TPU, and TPR.   The shoe according to claim 2 or 3, wherein in the mold setting step, a wear-resistant layer is previously placed in the mold set before the thermoplastic thin film is put in the mold set. Manufacturing method.   4. A fitting structure is formed in advance between the bottom surface of the filler and the upper surface of the thermoplastic thin film, and they are joined together, and at the same time, they are fitted by the fitting structure. A method for manufacturing a shoe according to 1.

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