Compression molding method of thermoplastic composite I-shaped reinforced component

Abstract

The invention provides a compression molding method of a thermoplastic composite I-shaped reinforced component. The compression molding method comprises the steps of prefabricating thermoplastic composite prepregs into a flat plate with a certain thickness through primary mold pressing; prefabricating two C-shaped prefabricated members through secondary mold pressing; combining upper and lower edge block prepregs to conduct pre-laminating of an I-shaped reinforced component; and finally, conducting tertiary mold pressing in a mold to form the component. Left and right trapezoidal bars of the I-shaped reinforced component mold are provided with wide-end-down inclined planes, so that downward mold pressure of a pressing block is converted into pressure pointing to the horizontal direction ofan I-shaped reinforcing rib by the left and right trapezoidal bars. Through the compression molding method, the problems that multi-direction pressure transfer cannot be conducted in an existing moldpressing process and component thickness unevenness and high porosity caused by difficult pressure transfer of complex components in the molding process are solved; and accordingly, low-cost manufacturing of the I-shaped reinforced component is realized, and the foundation is laid for application of an advanced thermoplastic resin matrix composite in the aviation field.

Description

technical field [0001] The invention relates to the technical field of composite material forming, in particular to a compression molding method of a thermoplastic composite I-shaped reinforced member. Background technique [0002] Thermoplastic resin-based composite materials (referred to as thermoplastic composite materials in this application) have good heat resistance, excellent damage tolerance, good impact resistance, short molding cycle, high production efficiency, and repeated molding. The aerospace field is gaining more and more attention. A class of advanced thermoplastic composite materials represented by carbon fiber reinforced polyether ether ketone is increasingly applied to the main / secondary load-bearing components in the aviation field. Poor performance and penetrability, difficulty in bonding between adjacent layers, difficulty in eliminating voids in the laminate, and difficulty in resin flow during the molding process, so the manufacturing of its parts r...

AI Technical Summary

Problems solved by technology

In the autoclave, the pressure of the filled gas is used to form a uniform pressure on the composite material, so the molding of the I-shaped stringer of the composite material can be easily realized in the autoclave, but the equipment of the autoclave is expensive, and the molding cost is high, and The molding process is more complicated, time-consuming and labor-intensive, and it is difficult to meet the requirements of industrialization

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