A combined core mold and a manufacturing method thereof

By using a combined core mold design that integrates the inner core and the skin, the processing difficulty and assembly accuracy of complex variable cross-section hollow structural parts are solved, achieving high-quality smooth inner cavities and low-cost manufacturing. The inner core material can be reused and can adapt to various target part shapes.

CN116277624BActive Publication Date: 2026-06-05SHAANXI TIANYI ANTENNA
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Patent Information

Application Number
CN202310121617.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-16
Publication Date
2026-06-05
Estimated Expiration
2043-02-16

AI Technical Summary

Technical Problem

In the existing technology, steel composite core molds used for molding complex variable cross-section hollow structural parts have problems such as high design and processing difficulty, high assembly precision requirements, and increased assembly gaps after multiple disassembly and assembly, which affect the quality and cost of the parts.

Method used

The design employs a combined core mold with an integrated core and skin. The core is made of soluble water-soluble material or low-melting-point alloy material, while the skin is made of single-layer woven prepreg. Through integrated molding and the selection of appropriate material curing processes, the core and skin are ensured to fit tightly together and meet the requirements for a high-quality smooth surface.

Benefits of technology

It achieves high-precision molding of combined core molds, with smooth and defect-free inner cavity surfaces, reducing part costs, improving part quality and manufacturing efficiency, and allowing the core material to be reused repeatedly to meet the needs of target parts with different shapes.

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Abstract

The application provides a combined core mold and a manufacturing method thereof, comprising an inner core and a skin, the skin covering the surface of the inner core, and the two being integrally formed. The integrally formed combined core mold can ensure that the skin and the inner core closely follow each other, so that the size of the combined core mold meets the requirements, and since it is integrally formed, it is not necessary to assemble and disassemble, thereby avoiding the problem that the gap becomes larger due to multiple assembly and disassembly, which affects the quality of the target workpiece. According to the glass transition temperature of the target workpiece to be formed, the inner core of the combined core mold is made of two types of materials, if the inner core is made of water-soluble materials, it can be prepared by itself, which has the advantages of low cost and batch manufacturing; if the inner core is made of low-melting-point alloy materials, rapid melting pouring and rapid melting demolding can be realized, and the combined core mold made of alloy cools down faster, the overall preparation efficiency of the inner core mold will be greatly improved, and the low-melting-point alloy can be repeatedly used through melting-cooling.
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