JP3022233U - Synthetic resin footwear sole with integrated heel - Google Patents

Abstract

(57) [Summary] [Purpose] There is no meat stealing, no need for workers to remove from the mold, automation of the manufacturing process is possible, lightweight manufacturing is possible, and materials are used in smaller amounts than before. This is to develop a synthetic resin footwear sole that has a heel portion integrally formed. [Structure] When manufacturing a synthetic resin footwear sole in which a flat bottom portion and a heel portion 3 in which a hole 5 opening upward is formed and an edge portion 4 is left are integrally formed, an edge of the heel portion 3 is formed. The outer wall 4a is formed in a taper shape that becomes narrower as it goes downward, and the inner wall 4b of the edge portion 4 is also made as taper that becomes wider as it goes upward, or is formed vertically, and a part or the entire periphery of the edge portion 4 Forming the cavity 6 or the heel 3
A synthetic resin integrally formed with a heel part 3 characterized in that a hollow part 6 is formed in a flat bottom part excluding the above, the high pressure gas is filled in the hollow part 6 and a wide bonding margin at the upper end of the edge part is held. Sex footwear soles.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a synthetic resin footwear sole in which a heel portion is integrally formed.

[0002]

[Prior art]

 Conventionally, synthetic resin footwear soles with integrally formed heels have a wide margin of adhesion because the periphery of the heels, that is, the upper edge of the edges, is firmly adhered to the upper part of the footwear. For this reason, the area around the heel is stolen (X) as shown in Fig. 3. Therefore, when removing it from the mold, it is necessary to perform so-called forced removal, so one worker is attached, and Not only is it difficult to automate the process, but this also increases the cost.

Further, if the taper shape is made so as not to forcefully remove it, that is, to become wider as it goes to the tip end so as to be automatically removed as shown in FIG. The bottom material and the upper part of the footwear are easily peeled off due to lack of strength. Also, if the bonding margin is wide and the bottom part is formed as it is, it will be too heavy and heavy, and it will not be of commercial value. That was not the case, and the cost was high.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention was invented in order to eliminate the above-mentioned drawbacks, there is no meat stealing, no work is required for removing from the mold, and the manufacturing process can be automated. The goal is to develop a synthetic resin footwear sole that is integrally formed with a heel that can be manufactured lighter and uses less material than before.

[0005]

[Means for solving the problem]

 This invention is intended to manufacture a synthetic resin footwear sole in which a flat bottom portion and a heel portion having an opening left above are formed inside to form a synthetic resin footwear sole. Is formed so that it becomes narrower as it goes downward, and the inner wall of the edge becomes wider as it goes upward, or is formed vertically, and a cavity is formed at a part of the edge or the entire circumference. A method for manufacturing a synthetic resin footwear sole integrally formed with a heel portion, characterized in that the cavity is filled with high-pressure gas, and the bonding margin at the upper edge of the edge is held wide. The hollow portion may be formed in the flat bottom portion excluding the heel portion, or may be formed in each of the heel portion and the flat bottom portion.

[0006]

[Action]

 In carrying out this invention, the already known hollow injection molding method (gas injection method) is used.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. A flat bottom portion (2) and a heel portion (3) in which a hole (5) having an upper opening is formed inside and an edge portion (4) is left are formed. When manufacturing an integrally formed synthetic resin footwear sole (1), the outer edge wall (4a) of the heel portion (3) is formed into a tapered shape which becomes narrower as it goes downward, and the outer edge wall (4a) of the edge portion (4) is formed. The inner wall (4b) also has a taper shape which becomes wider as it goes upward, or is formed vertically, and a cavity (6) is formed in a part or the entire periphery of the edge (4), and the cavity (6) has a high height. It is composed of a synthetic resin footwear sole integrally formed with a heel part, which is characterized by being filled with a pressurized gas (X) and holding a wide bonding margin (4c) at the upper end of the edge part (4), and also having a cavity. The part may be formed on the flat bottom part (2) excluding the heel part.

A lattice frame (7) may be formed in the hole (5) of the heel portion (3), and the high pressure gas (X) is specifically nitrogen gas.

[0009]

[Effect of device]

 According to the present invention, since the cavity portion (6) is formed in the edge portion (4) of the heel portion (3), the material forming the edge portion is small, the weight is light, and the heel portion (3) is small. Since the inner wall of the shoe is formed wider as it goes upward, it is not necessary for each worker to remove it from the mold, and automation is possible. Therefore, the cost is low, and a wide margin for the upper edge of the edge can be formed, so Can be firmly adhered, and when a hollow portion is formed in the flat bottom portion, excellent cushioning properties can be obtained, which is extremely useful.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a conventional example.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Synthetic Resin Footwear Bottom 2 Flat Bottom 3 Heel 4 Edge 4a Edge Outer Wall 4b Edge Inner Wall 4c Bonding Allowance 5 Hole Opened Up 6 Cavity 7 Lattice Frame

Claims (2)

[Scope of utility model registration request] 1. When manufacturing a synthetic resin footwear sole in which a flat bottom portion and a heel portion having an opening left upward and having an edge portion left therein are integrally formed, an outer wall of the edge portion of the heel portion is provided. Is formed in a taper shape that becomes narrower as it goes downward, and the inner wall of the edge part also becomes taper shape that becomes wider as it goes upward, or is formed vertically, and a cavity is formed in a part or the entire periphery of the edge part, A synthetic resin footwear sole integrally formed with a heel portion, characterized in that the hollow portion is filled with a high-pressure gas, and a bonding margin at the upper end of the edge portion is held wide. 2. The synthetic resin footwear sole according to claim 1, wherein the hollow portion is formed in a flat bottom portion excluding the heel portion.