Mold and control methods

By combining in-mold cutting and needle valve hot runner technology, the mold utilizes the cooperation of moving parts and needle valves to control the gate, achieving rapid cooling of fluid heat and uniform material filling, solving the problem of product surface defects, and improving the product's appearance and processing efficiency.

CN115723301BActive Publication Date: 2026-05-26RONGCHENG GOERTEK TECH CO LTD
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Patent Information

Application Number
CN202211399360.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-09
Publication Date
2026-05-26
Estimated Expiration
2042-11-09

AI Technical Summary

Technical Problem

In existing technologies, in-mold cutting technology and needle valve hot runner technology can easily lead to gate mark defects such as stress spots and dark spots on the surface of injection molded products.

Method used

The mold, which combines in-mold cutting technology and needle valve hot runner technology, controls the opening and closing of the gate through the cooperation of moving parts and needle valves. By using timing control methods, it ensures rapid cooling of fluid heat and uniform filling of material, thus avoiding the formation of defects.

Benefits of technology

It solves the product surface defects caused by in-mold cutting technology and needle valve hot runner technology, and improves the product's appearance and processing efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a mold and a control method. The mold includes a fixed mold and a moving mold, with a runner, a cavity, and multiple gates between the fixed mold and the moving mold. The multiple gates include a first gate and a second gate, through which fluid can be injected into the cavity respectively. A glue injection assembly includes a movable component and a needle valve. The movable component can open and close the first gate, and the needle valve can open and close the second gate. This invention, by coordinating the movable component and the needle valve, can solve the gate mark defects such as stress spots and dark spots on the product surface caused by the needle valve in the prior art.
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Citation Information

Patent Citations

  • Hot runner system and injection molding process thereof

    CN106541542A

  • Sequential side gate cutting mechanism for mold

    CN214324049U

  • Manufacturing method for lens covers of vehicle lighting fixtures

    JP5416997B2