Barrel-shaped composite structural member overall molding method capable of achieving easy demolding

A composite material and integral molding technology, which is applied in the field of composite material molding, can solve problems such as poor control of the dimensional accuracy of the inner wall, affecting the expansion capacity of the core mold, and difficulty in demoulding the steel female mold, so as to achieve improved overall performance, strong applicability, and avoid The effect of stress concentration

Inactive Publication Date: 2016-06-22
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the type of silicone rubber used, the state of the prepreg, the arrangement direction of the fibers and the design of the layup will affect the expansion capacity of the mandrel, and the expansion pressure of the mand

Method used

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  • Barrel-shaped composite structural member overall molding method capable of achieving easy demolding

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Example Embodiment

[0016] Example

[0017] As shown in the figure, an easy-release cylindrical composite structure is integrally formed including a sealed airbag 1, a sealing device 4, a release agent or a release cloth 2 for sealing the surface of the airbag, and a cylindrical composite structure with one end closed and one end open. Piece 3.

[0018] The specific process steps of the integral molding of the easily demoulded cylindrical composite material structure of the present invention are as follows:

[0019] The sealed airbag 1 made of fiber coated silica gel cloth is prepared according to the size of the cylindrical composite material structure 3. The sealed airbag 1 is a closed space with an air inlet, and the outer surface size of the sealed airbag 1 is equal to the cylindrical composite material The size of the inner surface of the structural part 3; the sealed airbag 1 is filled with compressed gas and sealed with the sealing device 4 as a mold for the cylindrical composite structure 3; a ...

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Abstract

The invention belongs to the technical field of composite material molding, and provides an integral molding method of a cylindrical composite material structural part that is easy to release the mold. The method comprises the following steps: preparing a sealed airbag of a high-temperature and high-pressure resistant material according to the size of the cylindrical composite material structural part to be formed; sealing the sealed airbag after being filled with compressed gas, as a mold for the cylindrical composite material structural part; Molding agent or laying release cloth; the fiber laying of the tubular composite structural part is completed by winding molding method; the tubular composite structural part completed with fiber laying is cured by autoclave-vacuum bag method; the sealed airbag Deflate and decompress to separate the cylindrical composite material structure from the airbag, complete the demoulding process, and obtain the overall cylindrical composite material structure. The method of the invention has simple process, not only can realize the integral molding of various complex cylindrical composite material structural parts, but also is convenient for demoulding, and can obviously reduce the cost.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and in particular relates to an integral molding method of a cylindrical composite material structural part which is easy to release the mold. Background technique [0002] In the production of cylindrical composite structural parts in the prior art, solid metal parts are widely used as mandrels for processing. After the product is solidified and formed, it is closely combined with the mandrel, which makes it difficult to take out the mandrel when the product is demoulded, and it needs to be forced by knocking or the like. Measures demoulding, this method is not only time-consuming and laborious, but may also lead to product deformation, damage or even scrapping. One of the development trends of composite materials is large-scale and integrated, thereby reducing the number of parts and improving the overall performance of the product. It is becoming more and more difficult to ...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C33/00
CPCB29C70/342B29C33/00
Inventor 李伟东高二盼赵京南唐丽萍王爱华柳建伟李德信
Owner DALIAN UNIV OF TECH
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