Connecting structure for top blocks of molds

Abstract

The invention discloses a connecting structure for top blocks of molds, which comprises a universal sliding seat and a cylindrical knockout pin, wherein the universal sliding seat is provided with a positioning hole, the knockout pin passes through the positioning hole, the connecting structure also comprises a socket head cap screw and a U-shaped positioning block, the lower end of the knockout pin passes through the universal sliding seat, the lower end of the knockout pin is provided with gaps along the circumferential direction thereof, the height of each gap is matched with the thickness of the U-shaped positioning block, the distance between two branch plates of the U-shaped positioning block is matched with the distance between two gaps in the knockout pin, the two branch plates of the U-shaped positioning block are inserted into the gaps of the knockout pin, the universal sliding seat and the U-shaped positioning block are provided with mounting holes, and the socket head cap screw after passing through the mounting holes connects the universal sliding seat with the U-shaped positioning block. The connecting structure disclosed by the invention is stable in structure, a phenomenon that the screw is loosened or fractured is not easy to occur, and the knockout pin and the U-shaped positioning block can be engaged stably and firmly; used parts are all common parts, therefore, the connecting structure is low in cost; and the connecting structure is simple and firm in structure, and convenient for mass production, popularization and application.

Description

technical field [0001] The invention relates to the technical field of plastic injection molding, in particular to a mold top block connection structure. Background technique [0002] Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it refers to injecting the heated and melted material into the mold cavity by high pressure, and after cooling and solidifying, a molded product is obtained. Injection mold is a tool that gives plastic products complete structure and precise dimensions in the injection molding process. Injection molds generally include: various parts for guiding, demoulding, core pulling and parting. In the demoulding process, a push-out mechanism is required to push or pull out the plastic product and its condensed material in the flow channel, and the push block is connected with the ejector rod, and the ejector rod is pushed out in all directions through the universal slide or pull out motio...

AI Technical Summary

Problems solved by technology

When in use, because the ejector rod continuously pushes or pulls out in different directions, the long screw is directly subjected to the force of the relative movement between the ejector rod and the universal sliding seat, and it is easy to cause the long screw to loosen or break, causing damage to the mold. Cause huge damage, seriously affect the production schedule and production quality

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