JPH08197653A - Injection molding method for waterproof shoe - Google Patents

Abstract

PURPOSE: To provide a waterproof shoe in which an instep part is easily prepared and waterproofness is excellent. CONSTITUTION: An instep cover 1 is constituted by interposing a waterproof layer 13 between the front instep cover 11 and the rear instep cover 12. An instep part 0 is formed by applying a French seam 10 to the instep cover 1 and an innersole 2 covered with a sheeting 21, so that the sheeting 21 is positioned in the mating face of the innersole 2 and the instep cover 1. The instep part 0 is lasted into a last 3 and the sole molding material is injected and introduced into a sole molding cavity 4 formed on the rear surface of the instep 0. A sole 5 is molded and also a part of the sole molding material is infiltrated into the mating face of the innersole 2 and the instep cover 1 through the sheeting 21 and solidified. The French seam 10 part of the instep cover 1 and the innersole 2 is sealed 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof shoe injection molding method.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Examined Patent Publication (Kokoku) No. 5-86202, a net cover is sewn on the lower edge of the cloth, the lower edge of the waterproof backing and the outer edge of the insole are sewn together. To form a crevice, and injection-mold the shoe sole on the underside of the crease, and by immersing and solidifying the shoe sole molding material into a net-like sewn cloth sewn to the lower edge of the hem, A method of manufacturing a waterproof shoe has been proposed in which a seam with a sole is sealed. However, a net-shaped cloth has to be sewn on the lower edge of the front cover in the formation process of the crepe part, and preparation of the crepe part is complicated and costly.

[0003]

SUMMARY OF THE INVENTION The present invention intends to economically manufacture a waterproof shoe which is easy in preparation for the limbs and excellent in waterproofness by providing a simple device for the insole.

[0004]

According to the present invention, a sack cloth 1 having a waterproof layer 13 interposed between a front cover 11 and a back cover 12 and an insole 2 covered with a sack cloth 21 are provided with a sack cloth 21. Bag 10 is sewn so as to be positioned on the mating surface with the crevice 1, and the crease part 0 is formed. The crease part 0 is hung on the last 3 and the shoe sole molding cavity 4 formed on the lower surface of the crease part 0. The shoe sole molding material is injected and injected into the shoe sole 5 to mold the shoe sole 5, and a part of the shoe sole molding material is infiltrated and solidified into the mating surface of the insole 2 and the cover 1 through the sack 21 to solidify the sole 1 and the cover 1. The gist of the invention is an injection molding method for waterproof shoes, characterized in that a bag 6 is sewn to the bottom 2 by a seal 6.

In the present invention, the front cover 11 is made of a woven fabric, a knitted fabric, a non-woven fabric or the like, a leather, or a combination thereof, and has a urethane-based or fluorine-based film or an entrant (registered) on its back surface. Trademark), Proteintex (registered trademark), Goretex (registered trademark), Microtex (registered trademark), and a waterproof layer 13 formed of a composite sheet of these resins and fibers, and the back surface thereof. A back cover 12 made of cloth, leather or the like is lined on the bottom.

In the present invention, the insole body 20 is a woven fabric,
A knitted fabric, a non-woven fabric or the like, or a laminate of these fabrics and a rubber or synthetic resin foam, on the surface of which a mark set knitted fabric, a tulle knitted fabric, a Russell knitted fabric, and various layers The insole 2 is formed by laminating a mesh-like rough cloth 21 such as a knitted cloth or a mesh cloth. In the present invention, if necessary, the insole main body 20 is notched in the toe or heel portion or the insole main body 20 is perforated 201.201 ... And the shoe sole molding material is formed at the time of molding the sole through the notches or perforations 201.201. If it is made to infiltrate and solidify on the upper surface of the insole 2, the waterproofness can be further ensured.

In the present invention, the garment cover 1 and the insole 2 prepared as described above are sewn 10 by a conventional method with the sack 21 overlaid on the upper surface of the insole facing the garment cover 1. It is prepared as a crepe part, which is hung on the last 3 and the side mold and the bottom mold are combined to form the shoe sole molding cavity 4 on the lower surface of the crepe part 0. The shoe sole molding cavity 4 is heated with vinyl chloride or the like. Plastic synthetic resin, 1.2 polybutadiene rubber. When injection-moldable sole molding material such as thermoplastic rubber such as styrene-butadiene block copolymer or liquid polyurethane is injected, part of the sole molding material is sewn through the sack 21 by injection pressure or foaming pressure.
From the lower part of the 0 part to the mating surface of the insole 2 and the upper part 1 of the upper part, it is infiltrated and solidified to form 6 parts of the seal in which 10 parts of the sewn bag are integrated with the sole of the shoe.

Since the present invention is constructed as described above, a waterproof shoe can be molded by an injection molding method similar to the conventional one by simply using the one having the rough cloth 21 attached to the surface as the insole, which is economical. Is.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an injection-molded state of a waterproof shoe according to the present invention.

FIG. 2 is an enlarged view of a main part of the completed waterproof shoe.

[Explanation of symbols]

 1. Cover 10 ... Bag-sewn 11 ... Front cover 12 ... Back cover 13 ... Waterproof layer 2. Insole 21 ... sackcloth 3. Last 4. Shoe sole molding cavity 5. Sole 6. Seal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location A43D 21/00 25/06 86/00 B29C 45/14 9543-4F // B29K 105: 20 B29L 31 : 50 A43B 10/00 101 C

Claims (1)

[Claims] 1. A waterproof layer 13 between a front cover 11 and a back cover 12.
The cover 1 with the interposition of and the insole 2 overlaid with the sack 21 are bag-sewn 10 so that the sack 21 is positioned on the mating surface of the cover 1 to form the cover 0. Part 0 is the last 3
The shoe sole molding material is injected and introduced into the shoe sole molding cavity 4 formed on the lower surface of the skirt part 0 to mold the shoe sole 5, and a part of the shoe sole molding material is passed through the sack 21 to form the midsole 2 An injection molding method for waterproof shoes, characterized in that 10 parts of the bag sewn between the cover 1 and the insole 2 are sealed 6 by infiltrating into the mating surface of the cover 1 and the cover 1.