Stitching process is mainly the uppers and soles stitched together by hand or machine. It is a traditional molding method for leather shoes and cloth shoes. This kind of process has two kinds of hand seam and machine seam. Hand sewn in anti Shang, Ming Shang, is this is a traditional method of shoes, press seams and seam welt seam is a traditional method of leather shoes.
There are 4 methods for injection molding.
(1) injection molding: with medium injection pressure and high cylinder temperature, synthetic resin plastic is injected into the mold, and the sole solidification and bottom bonding are completed at a time. More used for cloth shoes. Leather shoes, plastic shoes and rubber shoes are also used in this process.
2. Injection of rubber: plasticizing the rubber through the barrel, then injecting the mold into the mold with high injection pressure, and completing the bottom making and the bottom bonding molding. Used for cloth shoes and rubber shoes.
3. Pouring method: the A and B components of the quantitative reactive raw material, such as polyurethane, polyamide, etc., are mixed in the mixing head at high speed, and then poured into the mold cavity to make it solidified and formed under constant (high) pressure. It is now used in the production of rubber shoes and a small number of cloth shoes.
The slush: platisol poured into the shoe and shoe cavity, while heating, side rotary die, so that part of the plastisol under the centrifugal force of cemented body in the cavity wall, pour out the excess plastic sol solution, to make the body heating curing forming, demoulding, into the shoe the material. Used for rubber shoes and plastic shoes.
In the molding process has been stretched on the last foot help (upper mouth) fit the sole, around (for shoes), the blank into the mold is heated and pressurized by vulcanization molding. It is used in rubber shoes, leather shoes and cloth shoes.
There are 3 methods for the bonding process: (1) hot vulcanization bonding: the parts of the shoe are pasted and sent in.
The vulcanized tank is heated indirectly by steam or directly heated with air and steam, and the rubber parts are vulcanized and the bottom is bonded together. Among them, the outer bottom, bottom heel and other parts are pre molded and then pasted into other parts and sent into the vulcanizing tank to heat vulcanization. The two vulcanization is the traditional process of rubber shoes production. Some of the cloth shoes are also used in this method. (2) cold adhesive method: the shoes and soles are coated with adhesive and are pressed and formed at room temperature. Most of them are used for leather shoes, cloth shoes and rubber shoes. The adhesive joint method: cold sticky soles and uppers, soles and peripheral edge seams, and help to enhance the fastness between the bottom.
The assembly process assembles the shoe parts with mold, molding or punching and cutting into shoes. It is now used in plastic slippers and rubber slippers.
The production of shoes will be developed in the direction of production automation, process assembly, function diversification and fashion fashion. Computer aided design (CAD) and electronic computer aided production (CAM) have been widely used. The 4 kinds of shoes, such as leather, cloth, glue and plastic, continue to develop in the direction of mutual penetration of technology and the reference of materials to each other. New materials, new technologies and new equipment will also be constantly emerging, thus promoting the transition from labor intensive to technology intensive.
As the saying goes, cold rises from the foot. The original purpose of shoes is warm, safe, and climate environment (such as hot and cold, rain) has a direct impact on people of shoes. Throughout the world, the climate varies widely throughout the country, and the style of the shoes has a distinctive local climate.