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

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 ...

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 mandrel changes with the temperature, which is difficult to control accurately. Therefore, the size of the inner wall The accuracy control is relatively poor, and the steel female mold also has the problem of difficult demoulding

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