Plastic injection mold

Abstract

The invention provides a plastic injection mold. The plastic injection mold comprises a lower mold plate, a square iron, a lower mold insert, a rear mold core, an ejection assembly, a pushing assemblyand an elastic member; a plate cavity is formed at the upper end of the rear mold core; a cavity hole is formed in the middle part of the rear mold core; the pushing assembly comprises a pushing pipeinternal needle and a pushing pipe; the elastic member comprises a cylinder, a guiding head which is arranged at one end of the cylinder and a plurality of positioning bars which are arranged at theside edge of the other end of the cylinder; and the guiding head tallies with the tail end of the pushing pipe internal needle. According to the plastic injection mold, the guiding head of the elasticmember is clamped into the tail end of the pushing pipe internal needle during the machining, the positioning bars abuts against the inner wall of the pushing pipe to ensure that the cylinder is located at the central position of the pushing pipe, mold closing is carried out and plastic is injected to ensure that a square plate is formed in the plate cavity by the plastic, and a thick and circular plastic column is formed in the pushing pipe in the cavity hole, wherein the plastic wraps the elastic member to form the thick and circular column so as to ensure that the internal part of the thick and circular column does not need cooling and then the problems that the products are insufficient in strength and the appearances of the products deform are solved.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to an injection mold. Background technique [0002] In injection molding products, there is a structural product, which includes square plates and thick round rubber columns. The basic wall thickness of square plates is T. When processing, the product requires good front appearance and no basic defects. Among them, thick round rubber The diameter of the column is multiple times of T, the thick round plastic column is set at the root of the connection of the outer surface of the square plate, and the thick column is solid. [0003] The difficulty in processing this type of structural product is that the rubber at the root of the thick round rubber column is too thick. After the melt fills the mold cavity, the heat is concentrated and it is not easy to cool down; It takes a long time to cool, and there are serious shrinkage pit defects on the appearance of the thick round r...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an injection mold to solve the problem of insufficient product strength and deformation of the product appearance due to the thick round rubber column being too thick and difficult to cool when the existing injection mold produces products composed of square plates and thick round rubber columns. question

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