Compression molding method of thermoplastic composite component with I-shaped reinforcing ribs

Abstract

The invention provides a compression molding method of a thermoplastic composite component with I-shaped reinforcing ribs. The compression molding method of the thermoplastic composite component withthe I-shaped reinforcing ribs includes: first prefabricating a flat plate prefabricated member and upper and lower edge block prefabricated members from thermoplastic composite prepreg sheets throughprimary mold pressing, then prefabricating two C-shaped prefabricated members by performing secondary mold pressing on the flat plate prefabricated member, then performing preassembly on the I-shapedreinforcing ribs by using the upper and lower edge block prefabricated members in combination, and finally preforming third mold pressing for shaping the component. Wide-end-up inclined planes are arranged on a left trapezoid strip and a right trapezoid strip of an I-shaped reinforcing rib component mold, and downward mold pressure of a pressing block is converted by the left trapezoid strip and the right trapezoid strip into horizontal direction pressure pointing at the I-shaped reinforcing ribs. The compression molding method of the thermoplastic composite component with the I-shaped reinforcing ribs overcomes the problems that multidirectional pressure transmission cannot be performed and a complex component is difficult in molding pressure transmission, and therefore the complex component is uneven in thickness, high in porosity rate and the like, thereby achieving low cost manufacture of the I-shaped reinforcing rib component, and laying a foundation for application of advanced thermoplastic resin matrix composites 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 material component with an I-shaped reinforcing rib. 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 man...

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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