Composite foam sandwich structure and forming method thereof

Abstract

The invention relates to a composite material foam sandwich structure and a molding method thereof. The method is as follows: laying the lower skin prepreg material, and then curing to obtain the lower skin prefabricated part; dividing a foam core material into a plurality of block foam core materials, and then dividing the foam core material in each block foam core material The surface is coated with a layer of adhesive film and a layer of carbon cloth prepreg in sequence, and is cured in a vacuum to obtain a plurality of foam core material prefabricated parts; the surface of the foam core material prefabricated parts is coated with a layer of adhesive film, and A plurality of said foam core material prefabricated parts coated with adhesive film are spliced ​​and arranged to obtain a dimensioned foam core material preform and placed in said lower skin prefabricated part, and then on the surface of the dimensioned foam core material preformed part The skin prepreg is covered, and then integrally co-glued and formed to obtain a composite foam sandwich structure. On the premise of ensuring the weight loss of the product, the method of the invention not only improves the strength of the dimensional foam core material, but also solves the problems that the foam sandwich structure is prone to collapse and internal quality defects of the product.

Description

technical field [0001] The invention belongs to the technical molding field of composite materials, and in particular relates to a foam sandwich structure of composite materials and a molding method thereof. Background technique [0002] Composite foam sandwich structure is a typical structural form in many fields. Foam has the functions of impact resistance, weight reduction and dimensionality. For the composite foam sandwich structure, especially the special-shaped composite foam sandwich structure, the traditional process adopts the method of co-curing the foam lower skin, dimensional foam, and foam upper skin, but this method is easy to cause a large area of ​​the foam lower skin Loose defects, while the dimension foam is prone to risk of collapse. [0003] In view of the above problems, it is very necessary to provide a new method for forming a composite foam sandwich structure and a composite foam sandwich structure formed thereby. Contents of the invention [0004...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of poor molding quality and easy foam collapse existing in the existing composite foam sandwich structure, the present invention provides a composite foam sandwich structure and its forming method

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