A split-foldable mandrel structure applied to an injection mold

Abstract

The invention discloses a split and foldable mandrel structure applied to injection molds, relates to the technical field of mandrel structures for plastic molds, and solves the problem of lack of material in the shaft shoulder of a product with a stepped shaft style due to uneven distribution of solution materials Or trachoma problem, at the same time the functional structure has been improved, including the top cover; the top cover is a stepped semicircular cavity structure, and a side plate is welded at the left and right ends to form a complete stepped cavity Structure; the shaft shoulder of the final formed internal stepped shaft parts is prone to lack of material, the situation of trachoma is reduced, and a triangular warping groove is opened along the surface under the top cover, corresponding to the warping groove on the top of the bottom cover Four seesaws are installed by means of hinges. After the material liquid injected into the mandrel cavity is formed into a product, if the upper cover is not easy to remove, the upper cover can be lifted by lifting the warping groove at the bottom of the upper cover through these four seesaws. , the functional structure has been improved.

Description

technical field [0001] The invention relates to the technical field of mandrel structures for plastic molds, in particular to a split and foldable mandrel structure applied to injection molds. Background technique [0002] Mandrel refers to: the part of the mold used to form the profile surface in the compact or sintered body in the pressing direction, and some mandrels are also directly used as mold cavities for injecting plastic solutions, such as our common plastic or rubber stepped shafts etc., is obtained by this process. [0003] Chinese patent application number CN201910418286.8 relates to a mandrel body electric heating injection blowing mandrel, which is composed of mandrel body, mandrel head, mandrel ejector rod, mandrel compression spring, star nut and cover nut. There is an air passage through the front and back inside the body. The two ends of the air passage are the air inlet and the air outlet. The rear end of the head is connected, the star nut and the cove...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a split and foldable mandrel structure applied to injection molds, so as to solve the problem that the existing mandrel similar to the above-mentioned structure proposed in the background technology is used. Although the part will be reheated by the internally designed heating mechanism to improve the fluidity of the solution, when the stepped shaft products we mentioned above are blown, it will still be due to the fluidity of the solution at the shoulder. After the product is formed by instability, there will be material shortage or trachoma in these parts, which will affect the quality of the product. This is mainly caused by the uneven flow of the solution, and after the upper and lower cover cavities are combined to form the product, it is difficult to realize the problem of upper and lower separation.

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