JPH08224110A - Injection molding of waterproof shoes - Google Patents

Abstract

PURPOSE: To produce waterproof shoes which are-simple in instep preparation and excellent in waterproofness. CONSTITUTION: The instep cover 1, which intermediately has a waterproof layer 13 between the instep right side 11 and coarse instep backing 12, is opposed to the insole 2 covered with coarse cloth 21, while the coarse instep backing 12 is also opposed to the coarse cloth 21 covering the insole 2. Thus, the instep 0 is prepared with a French seam 10. The sole 5 is molded by suspending the instep 0 in a last 3 and injecting the material to be molded to the sole in a sole-molding cavity 4, which is formed on the lower surface of instep O. In addition, the material to be molded to the sole is partially solidified in the French seam 10 by having it permeate the coarse instep backing 12 and coarse cloth 21 covering the insole 2. Thus, the French seam 10 is sealed by a seal 6 between the instep cover 1 and insole 2.

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, a waterproof shoe having a hem part formed by bag-stitching a hem cover and an insole with a waterproof layer interposed between a front garment and a back garment, and a shoe sole being injection-molded on this garment, has been known. Is generally known,
Water such as rainwater that has penetrated into the front cover will penetrate into the back cover and insole due to the capillary phenomenon at the bag seam, and water will penetrate into the shoes.
We were unable to provide a completely waterproof shoe because the inside of the shoe was wet or damp. For this reason, as shown in Japanese Examined Patent Publication No. 5-86202, the outer cover of which a net-like sack is sewn on the lower edge, the lower edge of the waterproof backing and the outer peripheral edge of the insole are sewn together to sew the hem. The shoe sole is injection-molded on the lower surface of the scabbard, and the shoe sole molding material is immersed and solidified in a net-shaped sack cloth sewn to the lower edge of the outer scabbard to sew the joint between the scabbard and the insole. See
A method of manufacturing waterproof shoes has been proposed. 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 cover 1 having a waterproof layer 13 interposed between a front cover 11 and a sack cloth back cover 12 is provided.
And the insole 2 on which the sack 21 is laid, the back cover 12 made of the sack and the sack 21 placed on the insole 2 are made to face each other, and sewn 10 to form a skirt part 0. The part 0 is hung on the last 3 and the shoe sole molding material is injected and introduced into the shoe sole molding cavity 4 formed on the lower surface of the bottom portion 0 to mold the shoe sole 5 and a part of the shoe sole molding material. In 10 parts of bag sewing, the back cover 12 made of sack cloth and the sack cloth 21 laid on the insole 2 are infiltrated and solidified, and 10 parts of the bag sewn between the sack 1 and the insole 2 are seamed.
The gist of the invention is an injection molding method for waterproof shoes, which is characterized in that

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. Further, a back cover 12 made of a mesh-like rough cloth such as a marquette knitted cloth, a tulle knitted cloth, a Russell knitted cloth, various lace knitted cloths and a mesh cloth is lined.

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 cover 1 and the insole 2 prepared as described above are the back cover 12 and the insole 2 made of sack cloth.
It is prepared as a hem part by facing the sack cloth 21 laid on the top with a sewn bag 10 by a conventional method, and hangs this on the last 3 and combines the side mold and the bottom mold to attach the shoe to the bottom part of the hem part 0. A sole molding cavity 4 is formed, and a thermoplastic synthetic resin such as vinyl chloride, 1.2 polybutadiene rubber, etc. is formed in the shoe molding cavity 4. If injection-moldable sole molding material such as thermoplastic rubber such as styrene-butadiene block copolymer, liquid polyurethane, etc. is introduced, part of the sole molding material will be sack cloth by injection pressure or foaming pressure. Through both the cover 12 and the sack 21 overlaid on the insole 2, 10 parts of the bag sewn from the lower side to the back cover 12 on the upper side and the sack 21 overlaid on the insole 2 and solidified to make 10 parts of the bag sewn. 6 parts of the seal integrated with is formed. Bag sewing 1
Water does not infiltrate into the shoe through the back cover 12 or the insole 2 by capillary action from the front cover 11 through the 0 part.

Since the present invention is constituted as described above, the injection molding method similar to the conventional one can be carried out only by using the back cover made of a rough cloth and bonding the rough cloth 21 on the surface as the insole 2. It is economical because you can mold waterproof shoes with.

[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 Codes] 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

Claims (1)

[Claims] 1. A cover cover 12 made of a sack cloth, comprising a cover cover 1 having a waterproof layer 13 interposed between a cover 11 and a cover cover 12 made of a sack cloth, and an insole 2 covered with a sack cloth 21. And the sack 21 overlaid on the insole 2 are opposed to each other to form a sack part 10 by bag-sewing 10, and the slap part 0 is hung on the last 3 and the sole formed on the lower surface of the sack part 0. The shoe sole molding material is injected and introduced into the molding cavity 4 to mold the shoe sole 5, and a part of the shoe sole molding material is sewn into a bag 10 and a sack cloth 12 overlaid on the sack cloth and the insole 2 is sewn. 21. An injection molding method for waterproof shoes, characterized in that 10 parts of the seam between the jacket 1 and the insole 2 are sealed 6 by being infiltrated and solidified into 21.