Core pulling device of cylindrical core with backoff structures uniformly distributed on cylindrical surface

Abstract

The invention discloses a core pulling device of a cylindrical core with backoff structures uniformly distributed on a cylindrical surface. The device includes a core column (1), A sliding blocks (2), and B sliding blocks (3). According to the invention, six A sliding blocks, six B sliding blocks, and one core column are adopted to fit to form a cylindrical fit core with uniformly distributed backoff structures. The A sliding blocks and the B sliding blocks are connected and are in staggered arrangement around the core column at intervals. By the technical scheme of staggering the A sliding blocks and the B sliding blocks at intervals and lead them to concentric contraction, the problems of complicated structure, large body and high cost existing in the prior art are overcome, so that the injection mold of the cylindrical core with backoff structures uniformly distributed on the cylindrical surface can achieve the purposes of structure simplification, body decrease and cost reduction.

Description

technical field [0001] The invention relates to a core-pulling and demolding device for an injection mold, in particular to a cylindrical core that is used for an injection mold to extract a cylindrical core with an undercut structure evenly distributed on the cylindrical surface from a product by core-pulling and demoulding. Core pulling device for fabric inverted cylindrical core. Background technique [0002] For the core-pulling and demoulding of the cylindrical core with an undercut structure on the circumference of the cylinder, the prior art uses an oil cylinder to extract the conical core set in the cylindrical core with a valve structure before the product is ejected from the mold. Then, a number of oil cylinders respectively drive the core valve slider with an undercut structure to shrink centripetally from the product, and then the mold pushes out the product to demould; due to the large number of oil cylinders used, and the oil cylinders and auxiliary auxiliary ...

AI Technical Summary

Problems solved by technology

[0002] For the core-pulling and demoulding of the cylindrical core with an undercut structure on the circumference of the cylinder, the prior art uses an oil cylinder to extract the conical core set in the cylindrical core with a valve structure before the product is ejected from the mold. Then, a number of oil cylinders respectively drive the core valve slider with an undercut structure to shrink centripetally from the product, and then the mold pushes out the product to demould; due to the large number of oil cylinders used, and the oil cylinders and auxiliary auxiliary The mechanism occupies a large internal volume of the mold and has a complex structure, resulting in a large mold and high cost. In addition, during injection molding production, a large-scale injection molding machine with a large working stroke is required, resulting in high injection molding production costs. Therefore, the existing technology has complex structures. , large size, high cost problems and deficiencies

Images