Quick-change injection mold for optical structures

By using a split-type quick-change injection mold design, the problem of balancing precision and rigidity in the production of optical structural components is solved, enabling efficient production of optical components of different models, materials, or colors, and ensuring the consistency and reliability of optical properties.

CN121973397BActive Publication Date: 2026-07-21SHENZHEN ZHONGSHENG FILM MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN ZHONGSHENG FILM MATERIALS CO LTD
Filing Date
2026-04-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing injection molds are difficult to balance precision and rigidity in the production of optical structural components, especially when frequently changing models, materials or colors, which leads to flash, dimensional fluctuations and increased internal stress, affecting the consistency of optical properties.

Method used

The design adopts a split quick-change injection mold, which forms a stable external frame through the upper mold assembly and the lower mold assembly. Combined with the first mold clamping buckle, it ensures the overall clamping force and rigidity. The front mold core and the rear mold core are fixed as independent modules by screws and locked in a secondary manner to achieve precise locking of the modular cavity. Combined with the product design with a sprue frame, it ensures uniform and stable melt flow.

Benefits of technology

Maintaining high precision and resistance to deformation during frequent mold core changes ensures extremely low stress and high dimensional stability of optical structural components, reduces orientation stress and refractive index inhomogeneity, and guarantees consistency in light transmittance and refractive index.

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Abstract

The application discloses a quick-change injection mold for optical structural parts, and relates to the technical field of injection molding, which comprises an upper mold assembly, a lower mold assembly, a front mold core and a rear mold core, the upper mold assembly and the lower mold assembly are connected in a locked mode through a first mold locking buckle, the upper mold assembly comprises an upper mold plate, and at least two first positioning rods are arranged in a diagonal mode on the upper mold plate; the lower mold assembly comprises a lower mold plate, and at least two second positioning rods are arranged in a diagonal mode on the lower mold plate, and the second positioning rods correspond to the first positioning rods one by one; wherein the front mold core is fixedly connected with a first positioning sleeve matched with the first positioning rods in a plug-in mode, the rear mold core is fixedly connected with a second positioning sleeve matched with the second positioning rods in a plug-in mode, and the rear mold core is connected with the front mold core in a locked mode through a second mold locking buckle; the front mold core and the rear mold core are used for injection molding of products with a water port frame. The application solves the problem that the injection mold in the prior art cannot balance the precision and rigidity when the injection mold is used for producing optical structural parts.
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