Ejection mechanism for injection molding mold

Abstract

The invention discloses an ejection mechanism for an injection molding mold, wherein the ejection mechanism comprises a sleeve pedestal installed on a male mold ejection plate and a sleeve body arranged on the sleeve pedestal, an axle hole used for mounting a pin shaft is arranged in the sleeve body, the sleeve body is a double-joint sleeve body, the double-joint sleeve body comprises a movable sleeve body connected with the pedestal and an ejection sleeve body, a conical connecting body with a gradually decreasing outside diameter is arranged at the crossing site of the ejection sleeve body and the movable sleeve body, the movable sleeve body is arranged in a male template, the outside diameter of the ejection sleeve body is smaller than that of the movable sleeve body, and the inside diameter of the ejection sleeve body is equal to that of the movable sleeve body. The double-joint sleeve body with outside diameter difference is utilized in the invention, so that the sleeve end face is used for ejecting the formed product during the ejection process, the double-joint sleeve body applies a uniform ejection force on the formed product to guarantee the demolding, reduce the breakage of the formed product and generate no ejection mark on the outline of the formed product, and the ejection mechanism is simple and reasonable in structure, high in stability and is capable of avoiding such demolding failures of the formed product as breakage, scratch, etc.

Description

technical field [0001] The invention relates to an ejection part of an injection molding die, in particular to an ejection mechanism structure for an injection molding die. Background technique [0002] The structure of the mold for injection molding is changeable. Different gate forms, different ejection methods and different mold structures can form various types of mold forms. Therefore, it is quite difficult to clearly classify the molds. Hereby Generally, the commonly used classification methods can be simply distinguished according to the structure of the mold, two-plate mold, three-plate mold, no-runner mold and reverse injection mold. When the mold injects the molded product, the injection action is completed, the material filled in the molding space is cooled and solidified, and then the molded product is ejected. At this time, the fixed side and the movable side of the molding machine open the stroke, and the mold is separated by the parting surface. Start for the...

AI Technical Summary

Problems solved by technology

[0003] The ejection of the molded product depends on the molding material, the shape of the molded product, and the structure of the mold. When ejecting, it is best not to cause cracks, scratches, etc., and it must be demolded with few failures. However, the most frequent failure of the existing mold is It is the ejection mechanism, such as the ejection pin is broken, bent, stuck, etc., it must be easy to repair or replace, this is the principle for determining the ejection method

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