Inclined ejector multi-directional core pulling mechanism of middle frame injection mold

Abstract

The invention relates to an inclined ejector multi-directional core pulling mechanism of a middle frame injection mold. The mechanism comprises an inclined ejector head, an inclined ejector rod used for supporting the inclined ejector head and a guide sliding block used for mounting the inclined ejector rod, wherein the inclined ejector rod is obliquely arranged, an inclined ejector groove is formed in the guide sliding block, the tail part of the inclined ejector rod is positioned in the inclined ejector groove, the guide sliding block is fixedly arranged on an ejector pin plate, strip-shapedholes are formed in the groove walls on the two sides of the inclined ejector groove, the front half sections of the strip-shaped holes are horizontally-arranged horizontal sections, the rear half sections of the strip-shaped holes are inclined sections which are obliquely downwards arranged, a pin shaft hole is formed in the corresponding position of the tail part of the inclined ejector rod, apin shaft penetrates through the pin shaft hole, and the two ends of the pin shaft are located in the strip-shaped holes. Compared with the prior art, the mechanism has the advantages that a conventional guide sliding track is changed, the rear half section of the guide sliding track is arranged to be inclined downwards, so that the ejection speed of the inclined ejection head is slowed down afterthe inclined ejection head is subjected to inclined upward ejection and core pulling, and the inclined ejection head is completely separated from a product in the vertical direction.

Description

technical field [0001] The invention relates to an inclined-top multi-directional core-pulling mechanism of a middle-frame injection mold, and belongs to the technical field of injection molds. Background technique [0002] When designing an injection mold, one of the solutions to the situation that the undercut of the product cannot be removed normally is to use an inclined top core puller. In the conventional inclined top core pulling, the inclined top is ejected obliquely upwards, and the inclined top is pulled out from the underside of the product. However, if the two sides of the inclined top core are still covered by the product, and the product itself shrinks, when the inclined top core pulling cannot meet the normal pick-up of the mold, it is often necessary to increase the secondary ejection. The secondary ejection will increase the manufacturing cost of the mold, increase the complexity of the mold structure, and reduce the stability and reliability of the mold. ...

AI Technical Summary

Problems solved by technology

However, if the two sides of the inclined top core are still covered by the product, and the product itself shrinks, when the inclined top core cannot meet the normal pick-up of the mold, it is often necessary to increase the secondary ejection

The secondary ejection will increase the production cost of the mold, increase the complexity of the mold structure, and reduce the stability and reliability of the mold.

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