An injection mold for insert molding

By introducing a combination structure of positioning pins and abutments into the injection mold, the problem of inaccurate positioning of inserts during injection molding is solved, ensuring product appearance quality. Furthermore, the controllability of the injection molding process and product consistency are improved through high-pressure gas and sensor detection.

CN117464930BActive Publication Date: 2026-04-10TIANZE PRECISION TECH (SHANGHAI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANZE PRECISION TECH (SHANGHAI) CO LTD
Filing Date
2023-12-01
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

When existing injection molds have only one positioning feature on the product surface, inserts are difficult to position accurately, resulting in the insert positions of the injection molded products not meeting the requirements and affecting the appearance.

Method used

An injection mold structure is adopted, including components such as A plate, fixed mold core, moving mold core, support plate, ejector plate and seesaw. Through the cooperation of positioning inserts and abutments, the inserts are accurately positioned, and after the mold is closed, the positioning inserts are retracted into the wall thickness of the moving mold core to avoid affecting the appearance of the plastic product.

Benefits of technology

It achieves accurate positioning of inserts during injection molding, avoiding the impact of positioning inserts on product appearance. Furthermore, through high-pressure gas and sensor detection, it reduces the possibility of molten plastic and airflow entering the cavity, ensuring product quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117464930B_ABST
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Abstract

The application relates to the field of mold structures, in particular to an injection mold for insert molding, which comprises a matched A plate and a middle part, a fixed mold core which is detachably connected to the A plate, a movable mold core which is detachably connected to the middle part and cooperates with the fixed mold core to form an injection molded part, a bearing plate which is matched to a side of the middle part far from the A plate, a ejector plate which is located at a side of the bearing plate far from the middle part, a positioning insert needle which is sleeved in the movable mold core, an insert needle spring which is arranged at a side of the movable mold core far from the fixed mold core and forces the positioning insert needle to move away from the A plate, a seesaw which is rotationally connected to the bearing plate and has a rotation end capable of being abutted by the positioning insert needle, a pressing block which is abutted by a rotation end of the seesaw far from the positioning insert needle, a pressing block rod which is arranged on the pressing block and has a fixed position between the bearing plate, and a floating spring which is arranged on the ejector plate and forces the middle part to move towards the A plate when the mold is opened so that the seesaw is rotated to force the end of the positioning insert needle to extend into a cavity of the movable mold core. The end of the positioning insert needle only enters into the cavity of the movable mold core when the mold is opened, and the positioning insert needle is not easy to affect the appearance of a product.
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Citation Information

Patent Citations

  • Vacuum positioning mold for injection molding of large-size insert

    CN203485382U

  • Injection mould and injection molding method for hardware

    CN107283720A

  • Do it glue to be used for of same colour to seal fashioned seesaw mechanism of dichromatic

    CN206383396U