JP2005138413A - Manufacturing method of shoes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of shoes having multi-color soles different in elasticity. <P>SOLUTION: This manufacturing method of shoes includes an upper preparing process for preparing an upper having an undersurface and a peripheral surface stretched upward along the peripheral edge of the undersurface, an elastic block preparing process for preparing a premolded elastic block, a mold set preparing process for preparing a mold set comprising an upper mold, side molds and a shoes mold and capable of forming a mold cavity along with the undersurface of the upper after turning the undersurface of the upper upward, a mold set inserting process for turning the undersurface of the upper upward after inserting the shoes mold in the upper to match the same with the side molds to form the upward opened mold cavity and arranging an elastic block above the undersurface of the upper in the mold cavity, a foamable material injection process for injecting a predetermined amount of a foamable material in the mold cavity, a sole molding process for expanding and curing the foamable material after clamping the mold set by the upper mold from above and bonding the same to the upper to mold the sole and a shoes taking-out process for taking the molded shoes out of the mold set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing shoes, and more particularly to a method for manufacturing shoes including soles having different colors and elasticity.

  In U.S. Pat. No. 4,245,406, an outsole is fitted into a lower mold, an upper is placed in a shoe mold, and then the shoe mold is moved toward the lower mold so that there is no gap between the outsole and the upper. A shoe manufacturing method is disclosed in which a molding cavity is formed, and then a predetermined amount of PU is injection-molded into the molding cavity to mold an insole that connects the upper and the outsole.

  U.S. Pat. No. 4,960,374 discloses an apparatus for molding an outsole, an insole, and a welt on an upper. According to this apparatus, the thermoplastic material is injected into the cavity of the first mold, the welt molding cavity, and the insole molding cavity to form the outsole and the insole, and on the shoe mold that supports the upper. Also, a welt can be formed.

  However, in the shoe manufacturing method and apparatus by injection molding as described above, problems such as a shortage of the molding material due to the mold exhaust system, molding pressure, and molding temperature, protrusion, and deformation are likely to occur.

  Further, in the shoe manufacturing method disclosed in US Pat. No. 5,890,248, as shown in FIG. 1, a sole 2 having an outsole 201 and a heel 202 and an upper 3 are connected by a welt 1 and an upper bottom 4 The cavity 5 is formed between the outer sole 201 and the outsole 202, and then the foam material 6 is injected into the cavity 5 from the through-hole 203 formed on the outsole 201. Is discharged to the outside through the exhaust holes 101 and 102 formed on the welt 1, and the foam material 6 is expanded and cured in the cavity 5 to mold the insole that connects the outsole 201 and the upper 3. In this manufacturing method, soles with different elasticity can be molded, but since the outsole 2 and the welt 1 are molded in advance and then connected to the upper 3 by sewing, molded soles with various colors and appearances are molded. The sole or the overall appearance of the shoe is monotonous.

  In view of the above, an object of the present invention is to provide a method for manufacturing a shoe having soles having different colors and different elasticity.

  In order to achieve the above object, the present invention provides an upper preparation step of preparing an upper having a lower surface and a peripheral surface extending upward along the periphery of the lower surface, and a pre-formed elasticity It consists of an elastic block preparation step for preparing a block, an upper mold, a side mold, and a shoe mold. A mold set preparing step of preparing a mold set capable of forming a molding cavity together with the lower surface with the lower surface of the upper facing upward, and after the shoe mold is placed in the upper And forming the molding cavity opened upward together with the side mold after the lower surface of the upper is raised, and disposing the elastic block above the lower surface of the upper in the molding cavity A mold setting process, a foam material injection process for injecting a predetermined amount of foam material into the molding cavity, and after the mold set is tightened from above with the upper mold, the foam material is expanded and cured to Provided is a shoe manufacturing method comprising a sole molding step of molding a sole by bonding to an upper and a shoe removing step of taking out a shoe molded from the mold set.

  According to the shoe manufacturing method of the present invention, since the foaming material injection step is performed with the molding cavity open, the amount of foaming material is accurately controlled, and the conventional exhaust system or molding is performed. Problems such as lack of molding material due to pressure and molding temperature, protrusion, and deformation can be solved. Further, before the foaming material injection step is performed, a material made of a material and a color different from the foamed material is put into the molding cavity as an elastic block, so that a multicolor and elastic different sole can be molded. it can.

  Hereinafter, preferred embodiments of a shoe manufacturing method according to the present invention will be described with reference to the drawings. First, FIG. 2 and FIG. 3 show a first embodiment of the present invention. The three preparation steps of upper preparation, elastic block preparation, and mold set preparation in the manufacturing method of the present invention can be performed simultaneously, without any priorities. In this embodiment, the upper 10 is prepared first (upper preparation). Process). As shown in FIGS. 3 and 4, the upper 10 is made of an elastic stretch material, and has a lower surface 11 and a peripheral surface 12 extending upward along the periphery of the lower surface 11.

  Next, the pre-molded elastic block 20 is prepared (elastic block preparation step). In the present embodiment, the elastic block 20 is molded by imitating the curve of the bottom surface, and a filling portion 23 for injecting a foam material into the lower surface 21 is recessed.

  Subsequently, the upper molds 41 and 2 are made up of opposing side molds 42 and 43 and a shoe mold 44. The lower surface 11 of the upper 10 is directed upward, and the molding cavity 50 is formed together with the lower surface. A mold set 40 that can be formed is prepared (mold set preparing step).

  As shown in FIGS. 4 and 5, the first protective layer 14 and the second protection for preventing the foam material from adhering to the peripheral surface 12 of the upper 10 and the peripheral surface 22 of the elastic block 20, respectively. Apply layer 24. In this embodiment, GORTEX, which is a waterproof material, is used as the first protective layer 14 in the upper 10, and silicone oil, which is a mold release agent, is used as the second protective layer 24 in the elastic block 20.

  Then, after the shoe mold 44 is placed in the upper 10, the lower surface 11 of the upper 10 is moved up, and then the molding cavity 50 that is opened upward together with the two side molds 42, 43 is formed and elastic. The block 20 is disposed above the lower surface 11 of the upper 10 in the molding cavity 50 (mold setting step).

  Then, a predetermined amount of foam material is injected into the molding cavity 50 (foam material injection step). In this embodiment, a polyurethane foam composition is used as the foam material. Then, a foam material different from the polyurethane foam composition is injected into the filling portion 23 of the elastic block 20.

  Subsequently, after the mold set 40 is tightened from above with the upper mold 41, the foamed material is expanded and cured and bonded to the upper 10 to mold the sole 60 (mold sealing / sole molding process).

  The molded shoes are removed from the mold set 40 (shoe removal process). Finally, the foaming material that protrudes from the molding cavity 50 and adheres to the first protective layer 14 and the second protective layer 24 during the molding process is cut, and then the first protective layer 14 and the second protective layer. 24 and the peripheral surface 12 of the upper 10 and the peripheral surface 21 of the elastic block 20 (surface modification step; see FIG. 6).

  Since the shoe manufactured in this way puts the elastic block 20 in the molding cavity 50 before performing the foaming material injection step, it is possible to mold the sole 60 having different colors and different elasticity.

  Next, FIG. 7 shows a second embodiment of the present invention. The difference of the present embodiment from the first embodiment is that before the foam material injection step, the wear-resistant layer placement step of placing the wear-resistant layer 71 on the upper die 41 is performed and injected into the molding cavity 50. The foamed material is expanded and cured and bonded to the upper 10 and the wear-resistant layer 71 to mold the sole 70. As described above, similarly to the first embodiment, it is possible to mold the sole 70 having different colors and different elasticity, and to improve the wear resistance of the sole 70. 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.

  8 and 9 show a third embodiment of the present invention. The difference of the present embodiment from the first embodiment is that, in the elastic block preparation step, the elastic block 90 is molded by imitating the curve of the entire bottom surface of the foot, and a plurality of upper and lower surfaces 91 and 92 are formed on the upper and lower surfaces 91 and 92. A hollow pattern is formed which is formed of a hollow 93 and a plurality of ridges 94 communicating with the plurality of hollows, and a space 100 filled with a fluid is formed in the hollow pattern. There is. Accordingly, an adhesive is applied to the lower surface 11 of the upper 10 to bond the elastic block 90 to the lower surface 11 of the upper 10 before performing the mold placing step. Since the shoe manufactured in this way puts the elastic block 90 into the molding cavity 50 before performing the foaming material injection step, it is possible to mold the sole 80 having different colors and elasticity. 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.

  In the above-described embodiment, since the foaming material injection step is performed with the molding cavity open, the amount of foaming material is accurately controlled and depends on the conventional mold exhaust system, molding pressure, and molding temperature. Problems such as lack of molding material, protrusion, and deformation can be solved. Further, before the foaming material injection step is performed, a material made of a material and a color different from the foamed material is put into the molding cavity as an elastic block, so that a multicolor and elastic different sole can be molded. it can.

  As described above, the present invention can provide a method for manufacturing a shoe having soles having different colors and different elasticity.

It is sectional drawing which shows the shoes by the manufacturing method of the shoes currently disclosed by US Patent 5890248. It is a flowchart which shows the manufacturing method of the shoes of the 1st Embodiment of this invention. It is a perspective view which shows the upper, elastic block, and metal mold | die set in 1st Embodiment. It is sectional drawing which shows the state which put the elastic block in 1st Embodiment in the metal mold | die set, and inject | poured the foaming material into the shaping | molding cavity. It is sectional drawing of 5-5 of FIG. It is a perspective view which shows the state which peels off the 2nd protective layer in 1st Embodiment from the surrounding surface of an elastic block. It is sectional drawing which shows the state which put the elastic block in the 2nd Embodiment of this invention in the metal mold | die set, and inject | poured the foaming material into the shaping | molding cavity. It is sectional drawing which shows the state which put the elastic block in the 3rd Embodiment of this invention in a metal mold | die set, and inject | poured the foaming material into the shaping | molding cavity. It is a perspective sectional view showing shoes in a 3rd embodiment.

Explanation of symbols

10 Upper 11, 21, 92 Lower surface 12, 22 Peripheral surface 14 First protective layer 20 Elastic block 23 Filling portion 24 Second protective layer 40 Mold set 41 Upper mold 42, 43 Side mold 44 Shoe mold 50 Molding cavity 60, 70, 80 Sole 71 Wear-resistant layer 90 Elastic block 91 Upper surface 93 Recess 94 Opening 100 Space

Claims (6)

An upper preparation step of preparing an upper having a lower surface and a peripheral surface extending upward along the periphery of the lower surface;
An elastic block preparation process for preparing a pre-formed elastic block;
A mold set preparing step of preparing a mold set that includes an upper mold, a side mold, and a shoe mold, the upper surface of the upper surface being directed upward, and a molding cavity that can be formed together with the lower surface; ,
After the shoe mold is placed in the upper, the lower surface of the upper is raised, and then the molding cavity opened upward is formed together with the side mold, and the elastic block is formed in the molding cavity. A mold setting process to be placed above the lower surface of the upper,
A foam material injection step of injecting a predetermined amount of foam material into the molding cavity;
A sole molding step in which the mold set is tightened from above with the upper mold, and then the foam material is expanded and cured and bonded to the upper to mold the sole;
A method for manufacturing shoes, comprising: a shoe removing step of taking out shoes molded from the mold set.   The shoe manufacturing method according to claim 1, wherein in the elastic block preparing step, a material made of a material having a different material and color from the foamed material is prepared as the elastic block.   In the elastic block preparation step, the elastic block is prepared by imitating a curve of the bottom surface of the ridge, and a filling portion for injecting a foam material on the lower surface thereof is prepared. The method for manufacturing a shoe according to claim 1.   In the elastic block preparation step, the elastic block is formed by imitating the curve of the entire bottom surface of the foot, and includes a plurality of depressions on both upper and lower surfaces and a plurality of folds communicating the plurality of depressions. 2. The method for manufacturing a shoe according to claim 1, wherein a hollow pattern is formed and a space filled with a fluid is formed in the inside.   The protective layer for preventing the foaming material from adhering to the peripheral surface of the elastic block between the elastic block preparation step and the mold setting step. Shoes manufacturing method.   The shoe according to claim 1, wherein a protective layer for preventing foaming material from adhering to a peripheral surface of the upper is provided between the upper preparation step and the mold setting step. Production method.

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