A kind of foam sandwich structure panel and forming method thereof

Abstract

The invention relates to a foam sandwich structure wall plate and a forming method thereof. The method is as follows: laying multiple layers of lower skin prepregs, each laying 3 to 5 layers of lower skin prepregs is pre-compacted by vacuuming until the predetermined number of layers of lower skin prepregs is reached, Then after curing, the lower skin prefabricated part is obtained; the surface of a foam core material is coated with a layer of adhesive film and two layers of prepreg, and then vacuumized and pre-pressed to obtain a foam pre-hardened part; the foam pre-hardened part is placed In the lower skin prefabricated part, then lay multiple layers of upper skin prepreg on the surface of the foam pre-hardened part, and each layer of 3 to 5 layers of upper skin prepreg is pre-compacted by vacuuming until it reaches The predetermined number of layers of the upper skin prepreg is then cured and molded in an autoclave to obtain a foam sandwich structure panel. The method of the invention solves the problem of high-quality and high-efficiency molding of complex foam sandwich structure wall panels by using a reliable step-by-step molding process combined with a high-efficiency in-situ co-curing technology.

Description

technical field [0001] The invention belongs to the technical field of foam sandwich structure forming, and in particular relates to a foam sandwich structure wall plate and a forming method thereof. Background technique [0002] In view of the dual requirements of lightweight and high load-bearing structures, the design of foam sandwich structures, especially complex and large-scale foam sandwich structures, is becoming more and more popular. At present, the forming of complex foam sandwich structure panels is usually carried out by the method of secondary cementation. The existing process is usually low in efficiency, cumbersome in process, usually requires more molds, poor in internal quality control, and high in manpower and material costs. In addition, the traditional process is also likely to cause large areas of loose defects in the lower skin of the foam, and at the same time, the dimensional foam is prone to the risk of collapse. [0003] In view of the above probl...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems existing in the existing foam sandwich structure panels, the present invention provides a foam sandwich structure panel and its forming method

The molding method of the invention combines a reliable step-by-step molding process with a high-efficiency in-situ co-curing technology to solve the problem of high-quality and high-efficiency molding of complex foam sandwich structure panels