Pore-free polyurethane suction film sole foaming process

Abstract

The invention belongs to the field of polyurethane foaming sole manufacturing processes and relates to a pore-free polyurethane suction film sole foaming process. According to the pore-free polyurethane suction film sole foaming process of the invention, the vacuumizing degree of a film is changed; the film is not completely clung to the bottom of a mold before a polyurethane foaming body is poured in the mold, so that remaining air can exist between the film and the lines of the mold; and after the polyurethane material is poured, the polyurethane material is foamed and expanded in the mold with the film located between the polyurethane material and the mold so as to extrude out the air at sharp corner parts among the lines in the mold, and therefore, no air hole exists at the corners ofthe polyurethane foamed sole, and the problem of surface air hole formation which cannot be solved by traditional process is solved. With the pore-free polyurethane suction film sole foaming process of the invention adopted, the production yield of foamed shoe soles with sharp and thin corners can be effectively improved. The pore-free polyurethane suction film sole foaming process has the advantages of simple and convenient operation and convenience in popularization and application.

Description

technical field [0001] The invention relates to the field of manufacturing technology of polyurethane foamed shoe soles, in particular to the foaming technology of non-porous polyurethane film-absorbing shoe soles. Background technique [0002] Shoes are the necessities of everyone's life. In consideration of comfort, environmental protection, health and other aspects, people in life are more willing to choose shoes with better styles and materials. Good-looking shoes can improve personal image and life taste. The quality of the shoe material can have an impact on the performance of athletic ability, and it will also have an impact on physical health. The quality of the shoe material can also determine how much physical energy people consume in the same exercise intensity. [0003] The foam soles currently on the market generally place a bottom film on the shoe mold, heat the film to soften it and vacuumize it to fit the shoe mold, then inject foam material on the film, and ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that air is easily left between the foam material and the film when the general sole foaming process is used to foam the sole with sharp corners, resulting in the foam material not being completely and tightly filled to the corner position, There is a problem of pores between the film and the foamed material, and a non-porous polyurethane film-absorbing shoe sole foaming process is provided

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