A forced demoulding mechanism with on-machine quick release structure

Abstract

The application discloses a forced demoulding mechanism with an on-machine quick release structure, including a forming template, an undercut forming block, a connecting rod, a drive assembly, an on-machine quick-release insert and a gas-assisted demoulding component; the forming template A connecting channel is opened longitudinally on the top, and a quick-release chamber is opened on the upper end of the forming template; the inverted forming block is detachably arranged on the upper end of the connecting rod, and the connecting rod is movable longitudinally on the In the connecting channel; the on-machine quick-release insert is detachably fitted in the quick-release chamber; the on-machine quick-release insert is longitudinally provided with a guide hole, and the guide hole communicates with the connecting channel , the underturned forming block passes through and fits tightly in the guide hole; the underturned forming block is provided with a micro-air hole, and the connecting rod is provided with an air channel, and the micro-air hole communicates with the air road. It has the advantages of smooth demoulding and high molding quality.

Description

technical field [0001] The application relates to the field of injection molds, in particular to a forced demoulding mechanism. Background technique [0002] Using the plastic deformation of the plastic part itself to force the product out of the mold cavity is called forced demoulding. Forced demoulding needs to meet the conditions that the inner and outer depressions of the plastic part are relatively shallow, and the plastic of the molded part is polyethylene, polypropylene, polyoxymethylene, etc., which still have sufficient elasticity. In order not to cause damage and deformation of the plastic part due to excessive demoulding resistance during forced demoulding, the undercut depth of the plastic part must be within the required reasonable range, and at the same time, attention should be paid to designing the concave-convex undulations as rounded corners or slope transition structures. Since the undercut forming block for forced demoulding needs to be set with a specia...

AI Technical Summary

Problems solved by technology

However, the cost of directly processing the undercut forming block on a mold with a large external size is high and the machining accuracy will be difficult to control, and the replacement of the undercut forming block often requires the disassembly of many parts, which is very inconvenient

[0003] In addition, the contact area between the undercut forming block and the undercut structure is relatively large, and the sticking force between them is also relatively large, which is prone to sticking during forced demoulding, which affects the molding quality

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