JPH03131202A - Manufacture of shoe - Google Patents

Abstract

PURPOSE:To promote ventilation and improve comfort to wear by fitting the strip bodies of proper thicknesses as many as possible temporarily in the width direction, on the lower surface of a last. CONSTITUTION:A last with a lasted instep cover is combined with a lower mold having an external bottom forming hole section, and the hole section is enclosed, and by the manufacture of the shoes of a direct soling method for injecting fluid-like thermoplastic macromolecule material for filling to be cooled, strip bodies having specified thicknesses on the lower surface of the last are arranged as many as possible. As a result, the sole of a wearing person does not come in close contact with an insole surface, and ventilation is improved, and even in case of injection molding shoes by the direct soling method and even in case of summer times and wearing for a long time, the sole is prevented from becoming stuffy.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for manufacturing shoes, and in particular to the manufacturing of injection molded shoes using a direct sole method that does not cause stuffiness due to good ventilation even when worn for a long time. Regarding the law.

<Conventional technology> The method of manufacturing shoes by injection molding using the direct sawing method does not require skilled labor and allows a small number of people to manufacture shoes in large quantities with uniform quality in a short period of time. , is becoming the mainstream shoe manufacturing method.

<Problems to be Solved by the Invention> However, injection molded shoes manufactured by the above method may have a flat midsole surface that contacts the sole of the foot while the shoe is being worn, or may not conform to the arch shape of the sole of the foot. As a result, the soles of the employees' feet are in close contact with the inner sole of the shoes, and there is no breathability, and when worn in the summer or for long periods of time, the feet sweat and become stuffy, which significantly impairs the feeling of living.

In view of these circumstances, it is an object of the present invention to provide shoes that do not cause stuffiness on the soles of the feet even when worn in the summer or for long periods of time, even if they are injection molded shoes made using the direct sowing method. It is something.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention combines a shoe last into which an upper is suspended with a lower mold having a cavity for forming an outer sole, and seals the cavity. In a shoe manufacturing method using the direct sawing method, which is characterized by injecting and filling a thermoplastic polymer material in a fluid state and cooling it, strips having a predetermined thickness are appropriately placed on the bottom surface of the shoe last, and temporary bonding is performed. The present invention provides a method for manufacturing shoes characterized by the following:

The methods of hanging the upper over the last include the California method, in which the upper is fitted onto the last, and the lower periphery of the upper is sewn together with the periphery of the midsole, and the other is the California method, in which a string is passed through the lower periphery of the upper. Any string method may be used, in which a ring is made and a string is passed through the ring and fastened. As the thermoplastic polymer material for forming the outer sole, polyvinyl chloride, styrene-butadiene-brothol copolymer rubber called polyurethane-2 thermoplastic rubber, etc. are used. The strip temporarily attached to the bottom surface of the last is made of aluminum, presspod, hard rubber, etc., as appropriate.

Function> In the present invention, strips of appropriate thickness are temporarily attached to the lower surface of the last, as many strips as possible in the width direction, so that air that has become stuffy due to sweating, etc. can easily escape to the side surface of the upper. If this is done, grooves will be formed in the sole of the shoe accordingly, resulting in shoes that are comfortable to wear. At this time, if eyelets or the like are provided in the lower periphery of the upper in contact with both ends of the groove, ventilation will be further promoted and comfort will be improved.

Furthermore, since the stripes are temporarily attached to the bottom surface of the last, they can be easily replaced, and by changing their arrangement, the appearance or ventilation can be changed.

<Example> In the width direction of the tread part on the bottom surface of the last, five aluminum strips with a thickness of 2 mm and a medium thickness of 3 mm are placed at intervals of 8 mm, and the five strips intersect at right angles approximately at the center. Then, one of the same stripes as above was attached with polychloroprene adhesive toward the toe. The upper was hung on this shoe last using the California method, and combined with a lower mold having an outer sole cavity, 1 part by weight of 100% polyvinyl chloride with a degree of polymerization of 1000, 90 parts by weight of plasticizer DOP, and parts by weight of an organic tin stabilizer. 2 parts by weight mixture (injection temperature 180
°C) was injection-filled and then cooled to obtain shoes.

Effects> The shoes obtained by the above manufacturing method do not make the feet stuffy even when worn in summer or for a long time, and the appearance of the inside of the shoes can be easily changed as appropriate, and the product value is also improved. I was able to do it.

Claims (1)

[Claims] It is characterized by combining a last with a suspended upper part with a lower mold having a hollow part for forming an outer sole, sealing the hollow part, injecting and filling a thermoplastic polymer material in a fluid state, and cooling it. A method of manufacturing shoes by a direct sawing method, characterized in that stripes having a predetermined thickness are appropriately disposed on the lower surface of the last and temporarily attached.