PU shoe sole laminating and forming process

Abstract

The invention provides a PU shoe sole laminating and forming process which comprises the following steps of: flatly putting film paper on a bottom mould of a mould, and pressing a middle frame to cover the bottom mould, and fixing by tensioning hand fasteners; carrying out vacuum-pumping on an inner cavity of the mould and enabling the film paper to completely fit to the bottom mould; heating the mould for increasing the mould temperature to 60-70 DEG C; and finally, pouring a polyurethane foaming stock solution into the mould cavity for foaming and forming the polyurethane foaming stock solution in a mould cavity, and cooling and de-molding, thereby obtaining the laminated PU foamed shoe sole. The PU shoe sole laminating and forming process can effectively solve the problems of bubbles, material deficiency, foamed grains, pits and pores generated in a PU foamed shoe sole production process, so that bright effect of products is improved.

Description

technical field

[0001] The invention relates to a shoe sole processing technology, in particular to a PU shoe sole coating forming technology, which belongs to the field of shoe sole processing. Background technique

[0002] PU (polyurethane, referred to as polyurethane) soles have low density, good elasticity, good compression ratio, not easy to deform, good dimensional stability and other advantages that cannot be replaced by other materials. Polyurethane production process is formed by foaming liquid raw materials through chemical reaction. Generally, polyurethane two-component liquid reaction molding process is adopted. The main chemical reactions of this process include gel exothermic reaction, foaming endothermic reaction and crosslinking reaction. During the reaction process, the use of material temperature, mold temperature, ambient temperature, catalyst and foaming agent will all affect the foaming effect and the quality of the sole. It is necessary to control the t...