Rotary core-pulling device for outer deep undercut of fixed mold side of injection mold

Abstract

The invention discloses a deep undercut rotary core-pulling device on the fixed side of an injection mold, which comprises a pulling plate (1), a pressing block (2) and a deep buckling core block (3). The pull plate adopted in the present invention is provided with guide holes, and the deep buckle core block is provided with a rotating shaft and a guide pin. The deep buckle core block is connected with the cavity block through the rotating shaft, and the reverse end of the deep buckle core block is located in the cavity; two The drawing plates are respectively located on the front and rear sides of the deep buckle core block, and the drawing plate is fixedly connected with the panel of the fixed mold; the guide pin of the deep buckle core block is inserted in the guide hole of the drawing plate, and the pressing block is fixedly connected with the fixed mold panel The top of the deep buckle core block is in contact; when working, the fixed mold carrier plate and the fixed mold panel are separated first, and the pull plate pulls the deep buckle core block through the guide hole and guide pin to rotate counterclockwise around the rotating shaft, so that the undercut end is free from the product. The outer deep undercut is rotated and core-pulled out, and then the movable mold and the fixed mold are separated to release the product. The rotary core-pulling of the outer deep undercut on the fixed mold side of the plastic mold achieves simplified structure and work. Reliability and cost reduction purposes.

Description

technical field [0001] The invention relates to a core-pulling and demoulding device for an injection mold, in particular to a deep undercut on the fixed side of an injection mold for core-pulling and demoulding for the deep undercut of a product on the fixed side of the injection mold Rotary core puller. Background technique [0002] Explanation: Undercut refers to the flange, hook or rib structure in which the direction of core pulling and demoulding intersects with the opening and closing direction of the mold in injection molded products; the side facing the outside world when injection molded products are applied is called the outside, which is opposite to the outside The other side of the product is called the inner side; according to the position, the undercut located on the outside of the product is called the outer undercut, and the undercut located on the inside of the product is called the inner undercut; according to the size, the depth or length of the undercut ...

AI Technical Summary

Problems solved by technology

[0003] For the external deep undercut core-pulling on the fixed mold side, the existing technology uses the oil cylinder to drive the core-pulling block to rotate the core-pulling through the rack and gear, which is referred to as the rack method. Since the work of the oil cylinder involves hydraulic source, oil circuit, and control, the structure is complicated , many links, many potential failure nodes, high failure rate, poor reliability, and high operation and maintenance costs. In addition, the rack method occupies a large internal space of the mold, resulting in a large mold shape and high manufacturing costs; therefore, the existing technology has a complex structure , poor reliability, high cost problems and deficiencies

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