JPS6312603B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing the outsole of a shoe sole such as a men's shoe or a women's shoe.

[Technical Background of the Invention and its Problems] Conventionally, a method for manufacturing the outsole of this type of shoe sole is to provide a concave portion from the non-stepped part on the ground contact side of the outsole main body to the toe part, and to An injection part is provided between the non-stepping part and the toe part on the adhesive surface side, and communicates with the recess through an injection port, and raw material is injected from the injection part into the recess to form the non-slip piece. It was molded in one piece.

However, although it is possible to integrally mold the same materials using injection molding, it is impossible to integrally mold dissimilar materials using injection molding, and not only must vulcanization molding be used, but also the non-stepping part and the toe part. When the non-slip piece is integrally molded by injecting the raw material from the injection part which is easily worn in the middle part of the non-slip part, the thickness of the center part of the non-slip part where the injection part is located is thicker than the thickness of the peripheral part of the non-slip part, and it is difficult to slip. The center of the non-slip piece is less likely to cool down than the periphery of the non-slip piece, and the center of the non-slip piece becomes depressed, creating a so-called sink mark, resulting in an unsightly appearance and weak strength.
The value of the product was significantly reduced.

[Purpose of the Invention] Therefore, the present invention was created to solve the above-mentioned problems, and to make it possible to integrally mold dissimilar materials by injection molding, which was previously considered impossible. To provide a method for producing an outsole of a shoe sole that not only prevents the anti-slip pieces from peeling off, but also has a good appearance and strong strength, and can significantly improve the product value. It provides:

[Summary of the Invention] The gist of the present invention is to provide a recess from the non-stepping part on the ground contact side to the toe part, and to connect the recess to the recess through a small-diameter injection port near the non-stepping part on the adhesive surface side. After forming an outsole main body with an injection part that communicates with it and applying an adhesive to the inner surface of the recess on the ground side of the outsole main body and drying it, a paste-like synthetic resin or The method consists in integrally molding the anti-slip piece by injecting a raw material such as rubber from an injection section on the adhesive side.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.

In the figure, reference numeral 1 denotes an outsole main body made of leather, and this outsole main body 1 is provided with a recess 5 of an appropriate depth from the non-stepping part 3 to the toe part 4 excluding the peripheral edge on the ground surface 2 side. , a substantially elliptical injection part 8 is recessed near the non-stepping part 3 on the side of the adhesive surface 6 and communicates with the recess 5 through a small-diameter injection port 7;
A circular through hole 9 for preventing peeling and communicating with the recess 5 is formed in the vicinity of the toe portion 4 of the adhesive surface 6.

In addition, when the injection part 8 is provided in a recess, the side surface on the recess 5 side is attached to the non-stepping part 3 of the recess 5, as shown in FIG.
It is arranged so that it is located on the same vertical line as the side faces, and the back face is located on the same horizontal line as the back face of the recessed part 5.

Then, as shown in FIG. 4, a special high-performance adhesive is applied twice to the inner surface of the recess 5 on the ground surface 2 side of the outsole main body 1 and allowed to penetrate sufficiently, and then dried for about 1 hour. The non-slip piece 10 is integrally molded by injecting paste-like raw materials such as synthetic resin or rubber at an appropriate temperature from the injection part 8 on the adhesive surface 6 side into the recess 5 on the ground 2 side and melting the adhesive. It is.

[Effects of the Invention] As described above, the present invention has the following advantages:
After applying adhesive to the inner surface of the recess 5 on the side and drying it, raw materials such as paste synthetic resin or rubber are injected into the recess 5 from the injection part 8 on the adhesive surface 6 side to form the anti-slip piece 10. By integrally molding, not only is it possible to integrally mold dissimilar materials by injection molding, which was previously considered impossible, but injection molding also has a non-slip piece in the recess 5 compared to vulcanization molding. 1
0 can be brought into firm contact with the non-slip piece 10, so that peeling of the non-slip piece 10 can be reliably prevented. In this case, if a through hole 9 is provided near the toe portion 4 of the contact surface 2 and adhesive surface 6 so as to communicate with the recess 5, the front and rear ends of the anti-slip piece 10 can be connected to the through hole 9 and the injection portion 8. It can be held with synthetic resin or rubber, and the non-slip piece 1
Peeling of 0 can be more reliably prevented.

Moreover, a recess 5 is provided from the non-stepping part 3 to the toe part 4 of the contact surface 2 of the outsole main body 1, and a small-diameter injection port 7 is provided in the vicinity of the non-stepping part 3 of the adhesive surface 6 of the outsole main body 1. An injection part 8 is provided which communicates with the recessed part 5,
By injecting the raw material from this injection part 8 and integrally molding the anti-slip piece 10, the raw material can be injected from a position that avoids the part that is easily worn between the non-stepping part 3 and the toe part 4 when walking. Since the anti-slip piece 10 can be integrally molded, the anti-slip piece can be integrally molded by injecting the raw material from the injection part between the stepping part and the toe part, which are prone to wear when walking, unlike conventional methods. It is possible to reliably prevent sink marks from forming in the center of the stopper.
Therefore, it has a good appearance and strong strength.
Product value can be significantly improved.

As explained above, according to the present invention, it is not only possible to integrally mold dissimilar materials by injection molding, which was conventionally considered impossible, but also to reliably prevent the peeling of the anti-slip pieces, and to improve the appearance. Various effects can be obtained, such as the appearance is good and the strength is strong, and the commercial value can be significantly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a bottom view, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view of essential parts showing a state before the anti-slip piece is integrally molded in the recess. FIG. 4 is a sectional view of the main part showing the state after the anti-slip piece is integrally molded in the recess. 1... Outsole main body, 2... Ground contact surface, 3... Non-stepping part, 4... Toe part, 5... Concave part, 6... Adhesive surface,
7... Injection port, 8... Injection part, 9... Through hole, 10
...Non-slip piece.

Claims (1)

[Claims] 1. An outsole main body having a concave part from the non-stepping part on the ground-contacting surface side to the toe part, and an injection part communicating with the recessed part through a small-diameter injection port near the non-stepping part on the adhesive surface side. After applying adhesive to the inner surface of the recess on the ground side of this outsole and letting it dry,
A method of manufacturing an outsole for a shoe sole, which comprises integrally molding a non-slip piece by injecting a raw material such as a paste-like synthetic resin or rubber into the concave part from an injection part on the adhesive side.