Demolding device of injection mold used for inner and outer inverted buckle structure

Abstract

The invention discloses a demolding device of an injection mold used for an inner and outer inverted buckle structure. The demolding device comprises a forming core rod and a driving assembly, wherein the forming core rod is used for forming inverted buckles composed of inner inverted buckles (1-5) and outer inverted buckles (1-4), and the driving assembly is used for driving the forming core rod to move so as to complete demolding of the inverted buckles. The forming core rod sequentially comprises an outer core rod body (4), a middle core rod body (5) and an inner core rod body (6) from outside to inside, and the driving assembly is installed in the mold and connected with the lower end of the forming core rod and comprises a primary core pulling driving assembly for sequentially driving the inner core rod body (6) to achieve core pulling and a secondary core pulling driving assembly for driving the middle core rod body (5) and the outer core rod body (4) to achieve core pulling at the same time. The primary core pulling driving assembly and the secondary core pulling driving assembly are connected through a linkage mechanism. Therefore, the inner inverted buckles and the outer inverted buckles can achieve sequential graded one-time demolding, the structure is simple, and demolding is more effective.

Description

technical field [0001] The invention relates to the technical field of moulds, in particular to a demoulding device for injection molds with inner and outer undercut structures. Background technique [0002] At present, more and more auto parts are formed by injection molding through injection molds. Therefore, whether the structure of injection molds 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 parts are very complicated in shape, such as the attached figure 1 In the automobile part 1 shown in , its body 1-1 itself is a distorted shape, that is, the extension directions of the two ends intersect in space, and a boss 1-2 protruding from the surface is also provided at the twisted junction in the middle. , on the back of the boss 1-2, there is not only a hollow cylinder 1-3 protruding from the surface, but also a plurality of outer undercuts 1-4 along the circumfe...

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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