Ejection mechanism for injection mold

Abstract

The invention relates to an ejection mechanism for an injection mold. The ejection mechanism comprises a movable die, a die core arranged on the movable die and a pitched roof fixing plate arranged below the die core, wherein a forming ejection insert for forming the top of an inner cavity and back-off bayonets in a formed product and ejecting the formed product is arranged in the die core and comprises a forming insert, buckling inserts and a movable top rod; and one end of the movable top rod is fixedly connected with the pitched roof fixing plate, and the other end of the movable top rod is connected with the forming insert in a movable way. By the ejection mechanism, the back-off bayonets in the product are formed, and the product is convenient to demould, the buckling inserts are prevented from impacting the product and are also prevented from being damaged, the production quality of the product is ensured, the service life of the mold is prolonged, and the two back-off bayonets which have a small interval inside the product are formed; and the ejection mechanism has a reasonable structure and is easy and convenient to operate, easy to realize and high in safety performance, the production efficiency of enterprises is improved, and the performance of the product is ensured.

Description

technical field [0001] The invention relates to an injection mold, in particular to an ejection mechanism used in the injection mold. Background technique [0002] As we all know, injection mold is a kind of mold that is widely used in the current industrial production process. It is mainly composed of fixed mold, moving mold and ejection mechanism. The ejection mechanism is often on the moving mold. When the movable mold moves back to a certain position, the push plate on the injection molding machine pushes the ejector mechanism of the mold to eject the product. For some side concave products, it is often done by setting an inclined ejector mechanism. To open the mold, corresponding molding features should be set on the inclined top. After the product is formed, the inclined top is pushed down by the injection molding machine to eject the formed product, and the mold opening is completed. [0003] When the existing injection molds produce products with inner undercuts, su...

AI Technical Summary

Problems solved by technology

[0003] However, when the existing injection molds produce products with inner undercuts, such as injection molding to produce oil pump covers, both sides of the inner cavity of the oil pump cover are provided with undercuts Bayonet, due to the small inner cavity of the oil pump cover, the distance between the undercuts on both sides of the inner cavity is small. Forming, at the same time, the inner cavity of the oil pump cover is small, and the insert forming the undercut bayonet on the inclined top cannot shrink, making it easy to collide with the inside of the product, affecting the production quality of the product and damage to the inclined top, especially when both sides of the interior are formed at the same time When the buckle is reversed, because the distance between the two bayonets is too small, the buckle forming insert on the inclined top cannot be withdrawn and ejected, so that the injection molding cannot be produced; and the shape of the top of the inner cavity of the oil pump cover is also impossible Achieving molding that makes its products difficult to produce

Images