Some of the production process of shoes

Release time:

2023-09-27

Source： Network

Stitching process

The sewing process is mainly to sew the upper and sole by hand or machine. It is the traditional forming method of leather shoes and cloth shoes. This kind of process has two kinds of hand sewing, machine sewing. The traditional methods of cloth shoes are the reverse, bright and positive seams in hand seams, and the traditional methods of leather shoes are the press seams and along seams in machine seams.

injection molding process

Injection molding process has 4 kinds of methods.

① Injection molding method: with medium injection pressure and high barrel temperature, the synthetic resin plastic is injected into the mold, and the sole curing and the bottom combination molding are completed at one time. More used for cloth shoes. Leather shoes, plastic shoes, rubber shoes also use this kind of process.

② Injection method: The rubber is plasticized through the barrel, and then injected into the mold with a higher injection pressure, and at the same time complete the bottom and bottom bonding molding. For cloth shoes, rubber shoes.

③ casting method: the quantitative reactive raw material liquid (such as polyurethane, polyamide, etc.) of the, B components, in the mixing head high-speed stirring after pouring into the mold cavity, so that it in the normal (high) pressure curing combined with molding. Now it is mostly used in the production of rubber shoes and a few cloth shoes.

④ Slush molding method: pour the plastisol into the cavity of the female mold of boots and shoes, while heating, rotate the mold, so that a part of the plastisol is attached to the wall of the mold cavity under the action of centrifugal force to form a green body, pour out the excess plastisol liquid, continue to heat the green body to mature and form, and then put into the lining of shoes after demoulding. For rubber shoes and plastic shoes.

molding process

The molding process is to attach the sole and girth (for rubber shoes) to the foot of the stretched upper (the lower opening of the upper), put the rubber blank into the mold, heat and pressurize, and vulcanize and form. It is mostly used for rubber shoes, leather shoes and cloth shoes.

bonding process

There are three methods for bonding process: ① heat vulcanization bonding method: the parts of the shoe are pasted and sent to the vulcanization tank, heated indirectly by steam or directly by air and steam, and the help and bottom are bonded and formed while the rubber parts are vulcanized. Among them, the outsole, bottom heel and other parts are pre-molded and then pasted with other parts and sent to the vulcanizing tank for heating and vulcanization, which is called the secondary vulcanization method, which is the traditional process of rubber shoe production. Some shoes also use this method. Cold adhesive method: upper, sole coated with adhesive, pressure bonding molding at room temperature. Now it is mostly used in leather shoes, cloth shoes and rubber shoes. ③ Sticking and sewing method: After the upper and sole are cold-bonded, the periphery of the sole is sewn with thread to enhance the fastness between the sole and the upper.

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