Slush molding process capable of overcoming surface sand hole defect

Abstract

The invention discloses a slush molding process capable of solving a surface sand hole defect, which is optimized, and comprises the following steps: before preheating a slush molding mold and before preheating the slush molding mold, using a writing brush or a brush, dipping a small amount of plasticizer, and smearing a thin layer on a sand hole area easily appearing on the surface of the mold; in the feeding process, the slush molding powder can be in contact with the plasticizer on the surface of the mold, and the plasticizer and the powder are fused, so that the plasticizing performance of the powder is accelerated and improved, and the defect degree can be eliminated or reduced. The method is particularly suitable for machining products with sharp corners in structures.

Description

technical field [0001] The invention belongs to the technical field of slush-molding technology, and in particular relates to a slush-molding technology capable of solving surface blister defects in sharp corner regions of workpieces. Background technique [0002] Slush molding, also known as coagulation molding, is an important method of making hollow soft products with paste plastics. Pour the paste plastic (plastisol) into the slush molding mold (concave or female mold) that has been heated to a certain temperature in advance. , the paste plastic close to the inner wall of the mold cavity will gel due to heat, then pour out the non-gelled paste plastic, and heat-treat (bake and melt) the paste plastic attached to the inner wall of the mold cavity, and then cool it A hollow article is obtained from the mould. Heat the back or the whole of the patterned slush mold (nickel shell), the slush mold is docked with the powder box containing PVC powder and then rotates or rotates...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above-mentioned problems in the prior art, the present invention provides a slush molding process that can solve the defect of epidermis trachoma. The process is optimized. Before the slush mold is preheated, apply an appropriate amount on the surface of the slush mold where trachoma is prone to occur. Plasticizer, and then preheating, during the heating process, the plasticizer remains on the mold and will not evaporate due to high temperature, during the feeding process, the slush powder will contact the surface of the mold Plasticizer, the fusion of plasticizer and powder accelerates the improvement of the plasticizing performance of the powder, which can eliminate or reduce the degree of defects

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