Bag molding method of composite material component

Abstract

The invention discloses a bag molding method of a composite material component. A layer of temperature-resistant plastic fabric with good ductility, adhesive suction function, breathability and inadhesion to the surface of a composite material is paved on the surface of a composite material blank so as to replace release cloth, a porous isolating membrane, adhesive suction cloth and breathable cloth, so that the surface quality of the composite material component is ensured, and meanwhile, the simplicity in operation is realized. The temperature-resistant plastic fabric adopted by the invention has the characteristics of good deformability, good ductility, good conformability to a complex surface, difficulty in wrinkling, adhesive suction and breathability, and the method is simple to operate and can ensure that pressure is uniformly transmitted to the composite material blank during a curing process; and the surface quality of the composite material component is effectively ensured, the defects such as wrinkles, shortage of adhesives and excess in adhesives occurring on the cured surface are overcome, and the occurrence of the problem that large-area pores of the component are caused by vacuum bag breakage due to bridging of vacuum bag auxiliary materials can be prevented.

Description

technical field [0001] The invention relates to composite material forming technology, especially the technology of bag press forming composite material. Background technique [0002] The bag press molding method of composite materials is usually to attach the outer surface of the composite component blank to the surface of the forming tooling, and place the release cloth, porous isolation film, absorbent cloth, non-porous isolation film, breathable cloth and Vacuum bag auxiliary materials such as vacuum bag, and then seal the vacuum bag with sealing tape to form a vacuum bag system, put it into an oven or autoclave according to the specified curing process parameters to complete the curing and molding. Separation, wrinkling, and bridging in the corner area, which cannot be found by existing means, lead to the curing process. In the traditional bag molding process, due to the poor ductility, poor deformability, and no stickiness of vacuum auxiliary materials such as releas...

AI Technical Summary

Problems solved by technology

Separation, wrinkling, and bridging in the corner area, which cannot be found by existing means, lead to the curing process. In the traditional bag molding process, due to the poor ductility, poor deformability, and no stickiness of vacuum auxiliary materials such as release cloth, After the vacuum bag system is assembled, there may be slippage between the vacuum bag auxiliary material and the blank, and the external pressure and vacuum pressure in the vacuum bag system cannot be uniformly transmitted to the composite member, so that wrinkles and bridging cavities are formed on the surface of the blank. There may even be vacuum bag ruptures (especially for composite components with complex curved surfaces), which are reflected in the cured composite components as surface wrinkles, poor glue in corner areas, rich glue or even delamination, large-area pores and other defects, resulting in high-value of composite components are scrapped

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