Demoulding device for injection molds with inner and outer undercut structures

Abstract

The invention discloses a demoulding device for an injection mold of an inner and outer undercut structure, comprising a forming mandrel for forming an undercut composed of an inner undercut (1-5) and an outer undercut (1-4). 1. The driving assembly that drives the forming mandrel to move to complete the reverse buckle release; the forming mandrel includes the outer mandrel (4), the middle mandrel (5) and the inner mandrel (6) from the outside to the inside, and the drive assembly is installed on the mold Inner and connected to the lower end of the forming mandrel, including the primary core-pulling drive assembly that sequentially drives the inner mandrel (6) to pull the core, and the secondary drive that simultaneously drives the middle mandrel (5) and the outer mandrel (4) to pull the core The core driving assembly, the primary core pulling driving assembly and the secondary core pulling driving assembly are connected through a linkage mechanism. Therefore, the internal undercut and the external undercut can be successively graded and one-time demoulding, and the structure is simple and the demoulding is more effective.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a demolding device for an injection mold with an inner and outer inverted structure. Background technique [0002] At present, more and more auto parts are made by injection molding. Therefore, whether the structure of the injection mold is reasonable or not determines the stability, safe operation and economy of the production of a part. However, the shapes of the parts are various, and some are very complex, such as the appendix. figure 1 As shown in the auto part 1, its body 1-1 itself is in a twisted shape, that is, the extension directions of both ends are crossed in space, and there is also a boss 1-2 protruding from the surface at the twisted intersection in the middle. , on the back of the boss 1-2, not only has a hollow cylinder 1-3 protruding from the surface, but also has a plurality of outer undercuts 1-4 along the circumferential direction on the periphery of the cyli...

AI Technical Summary

Problems solved by technology

Therefore, for such products with internal and external undercut structures, it is very difficult to demould. If the structure of opening the mold from top to bottom is adopted, the protrusion on the inner undercut will be broken during demoulding; if the mold is opened left and right structure, the mold opening of the inner undercut will be hindered by the outer undercut during demoulding

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