Composite material structure and preparation method thereof

Abstract

The invention discloses a composite material structure and a preparation method thereof. The composite material structure mainly comprises a first fiber layer, at least one flow guide middle layer and a second fiber layer which are sequentially overlapped from top to bottom. The preparation method disclosed by the invention comprises the following steps: sequentially overlapping and laying a second mold, a first fiber layer, at least one flow guide middle layer and a second fiber layer on the surface of a first mold from top to bottom, and then covering and sealing by using a vacuum plastic film; after a space between the vacuum plastic film and the first mold is vacuumized, enabling a liquid-state resin to respectively flow upwards and downwards through each flow guide middle layer by utilizing vacuum pressure so as to soak the first fiber layer and the second fiber layer, and simultaneously enabling the liquid-state resin to flow from the first end to the second end; and after the first fiber layer, each flow guide middle layer and the second fiber layer are completely impregnated with the liquid-state resin, closing the feeding end, and finally, waiting for the liquid-state resin to be cured and molded.

Description

technical field [0001] The invention relates to a composite material structure and a preparation method thereof, in particular to a composite material structure capable of having high-quality surfaces on both the inner and outer surfaces, so as to be used as a product shell with special requirements. Background technique [0002] At present, there is a technology on the market that uses heating and pressure to harden multiple overlapping resin-containing carbon fiber cloths to form a product shell, which can give the product sufficient strength and reduce the weight and thickness of the product. Among them, Vacuum Assistant Resin Transfer Molding (VARTM for short) is a closed mold molding technology, mainly laying multi-layer carbon fiber or glass fiber dry cloth on the surface of the mold, and adding A layer of release paper, a layer of diversion mesh cloth and a diversion tube are added on the top of the release paper, and then the vacuum plastic film is used to cover and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite material structure and its preparation method, which can solve the problem that the existing VARTM molding technology cannot make the inner and outer sides of the composite material product have high-quality surfaces, and can pass the liquid resin Injecting through at least one end of the guide middle layer, and then allowing the liquid resin to flow up and down to soak different fiber layers respectively, so that the composite material structure with high-quality surfaces on both the inner and outer sides can be formed, so as to Used as a product shell with special requirements

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