Prepreg mold pressing mold without pre-shaping

By using prepreg molding dies that do not require pre-formation, and by utilizing air guiding mechanisms, vacuum systems, and multi-zone temperature control, the problems of long production cycles and poor adaptability to complex structures in traditional molding processes have been solved, achieving high-efficiency production and low-defect prepreg molding.

CN224408533UActive Publication Date: 2026-06-26SHANDONG BOXES NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202521634583.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-02
Publication Date
2026-06-26
Estimated Expiration
2035-08-02

AI Technical Summary

Technical Problem

Traditional prepreg molding processes require a separate pre-forming process, which prolongs the production cycle, affects product quality and production efficiency, and is difficult to be compatible with complex structural designs, resulting in problems such as bubble defects and high porosity.

Method used

It adopts a prepreg molding die that does not require pre-formation, combined with a gas guiding mechanism and a vacuum system. The gas is drawn out in the die through the gas guiding groove and vacuum pump. Combined with a porous gas guiding membrane and carbon fiber heating wire, gas discharge and stable positioning of the prepreg are achieved. The resin flowability is adjusted with a multi-zone temperature control system.

Benefits of technology

Eliminating the pre-forming process shortens the production cycle, reduces bubble defects and porosity, improves the molding adaptability of complex structures, and enhances product quality.

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Abstract

The utility model discloses a prepreg mold pressing mold without pre-shaping, and belongs to the technical field of prepreg mold pressing molds. A prepreg mold pressing mold free of pre-shaping comprises a base frame and a mold set arranged on the base frame, an air guide mechanism is arranged in the mold set, a vacuum system is arranged on the base frame and used for extracting air in the mold set through the air guide mechanism, the mold set comprises a lower mold and an upper mold, and the upper mold is arranged on the lower mold. The lower die is composed of at least two modules which are both connected to the base frame in a sliding mode. According to the utility model, the traditional independent pre-shaping process can be omitted, the production cycle is directly shortened, the fiber disturbance is reduced by dynamic mold cavity adjustment, the bubble defect is effectively reduced by cooperation of the air guide structure and the vacuum system, the porosity of finished products is reduced, and complex layering designs such as asymmetry and curved surfaces are compatible; and the method is particularly suitable for forming prepreg products with complex curved surfaces or variable cross-section structures.
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