Mold core pulling anti-back mechanism and mold

Abstract

The invention provides a mold core-pulling anti-retraction mechanism, which includes a mold body, a driving device installed on the mold body, a transmission part connected to the output end of the driving device, an inner drawing fixing block, and a driving device installed on the inner drawing fixing block. The inner tap and the anti-retraction block are provided with a guide groove extending along the inner and outer directions in the inner drawer fixed block, the anti-retraction block is embedded in the guide groove, the driving part is provided with an active part, and the anti-retraction block is provided with There is a passive part matched with the active part, and the mold body is provided with a limit groove; when the driving device pushes the transmission part to move forward, the transmission part pushes the anti-retraction block, the inner drawing fixed block, and the inner tap to move forward , and the transmission part pushes the anti-retraction block to protrude outwards and embeds it in the limit groove of the mold body; when the driving device pulls the transmission part to move backward, the transmission part pulls the anti-retraction block to shrink inward and exit the limit slot, and the transmission member pulls the anti-retraction block, the inner drawer fixing block, and the inner tap to move backward.

Description

technical field [0001] The invention relates to a mold core-pulling mechanism, in particular to a mold core-pulling anti-retreat mechanism and a mold. Background technique [0002] When using an injection mold to process a product with a through hole, groove, or boss, the product cannot be directly released from the mold during the demoulding process, but must be used to form the through hole, groove, or boss first. The core is pulled out from the mold body, that is, core pulling. This requires a mechanism that can extract and reset the core, that is, a core-pulling mechanism. [0003] The fixed mold core is usually driven by an oil cylinder. In the production process, the core is first moved forward relative to the mold body through the oil cylinder; then the injection molding process is performed; after the injection molding is completed, the core is pulled back relative to the mold body through the oil cylinder, thereby realizing core pulling. However, during the injec...

AI Technical Summary

Problems solved by technology

However, during the injection molding process, the core will retreat along the core-pulling direction due to the injection pressure, which will cause the product to be unqualified

At the same time, because it is a fixed mold core pulling, ordinary locking blocks cannot be added

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