Method for preparing three dimension stereo sandwiched carrier composite plate

Abstract

The present invention discloses a manufacturing method for three-dimensional bearing composite plate with a core layer. First of all, a top panel inner layer and a lower panel inner layer are laid above and below the light weight core material respectively to for the pre-weaving body; and then, the top panel inner layer, the light weight core material and the lower panel inner layer are weaved together by a three-dimensional weaving technology to for the three-dimensional structure with a core layer; and a top panel outer layer and a lower panel outer layer are laid above the top panel inner layer and below the lower panel inner layer respectively to form the preformed body; finally, the phenolic resin is guided into the preformed body by a vacuum forming technology, wherein a vacuum degree of 0.05~0.09 MPa is kept, a curing process is executed for 0.5~5 hours at 20~200 DEG C; then the preformed body after curing is taken out and is subjected to grinding and trimming processing, thereby, the three-dimensional bearing composite plate with a core layer and a high fire retardance is obtained. The manufacturing method of the present invention can effectively solve the problem of that the general composite plate is easy to delaminate, has a poor bearing force; the metal composite plate is easy to be corrupted; and the resin based composite plate has a poor fire retardance. The composite plate with a core layer of the present invention is adapted to the application of high shear and high compression; thereby the application scope is enlarged.

Description

technical field [0001] The invention relates to a composite panel with high load-bearing performance and a three-dimensional sandwich structure, and a method for preparing the composite panel by adopting a three-dimensional weaving process and a vacuum-assisted RTM forming process. Background technique [0002] The composite board is generally composed of an upper panel, a core material (placed between the upper and lower panels) and a lower panel. The preparation method generally glues the upper panel, the core material and the lower panel together first, and then uses hot pressing to form Composite panels that are technically pressed into desired structural features for finished product sales. The composite panels prepared by glueing and hot pressing have delamination defects at the joints between the upper and lower panels and the core material. When the layered junction of the composite board is not firm, not only will the overall strength of the product be poor, but al...

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Problems solved by technology

[0004] The object of the present invention is to propose a method for preparing a three-dimensional sandwich load-bearing composite panel, which uses a three-dimensional weaving process to weave the two inner layers joined to the lightweight core material together, which solves the defect that the composite panel is easy to delaminate; Vacuum-assisted RTM (Resin Transfer Moulding) molding process is used to impregnate the phenolic resin into the preformed composite board, which strengthens the shear force between the fiber bundles of the supporting structure and the fiber bundles, and effectively improves the strength of the fiber bundles prepared by the present invention. Load bearing capacity of composite panels

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