Light-weight and high-strength composite wall board and production method thereof

Abstract

A light-weight and high-strength composite wall board sequentially comprises an outer covering layer, a sandwich layer and an inner covering layer from the inside to the outside, wherein the outer covering layer and the inner covering layer are made of one or a mixture of several of high-strength glass fiber, carbon fiber or polypropylene high-strength fiber; the wall board further comprises resin embedded into spaces among the outer covering layer, the sandwich layer and the inner covering layer by a vacuum introduction method. The invention further discloses a production method of the light-weight and high-strength composite wall board. The light-weight and high-strength composite wall board is simple in structure and low in production cost; mechanical properties of the wall board are above 30% better than those of a conventional square-cabin wall board; the problem of stress concentration at corners of a square cabin is solved; the production method is simple and convenient to operate and high in production efficiency, and facilitates industrial production.

Description

technical field [0001] The invention relates to a composite material wallboard, in particular to a lightweight high-strength composite material wallboard and a manufacturing method thereof. Background technique [0002] Traditional shelters are generally assembled from polyurethane sandwich panels through connectors, and their wall panels are generally composed of aluminum alloy outer skin layers, steel skeletons (or aluminum skeletons), polyurethane foam sandwich cores, and aluminum alloy inner skin layers. The wallboard manufacturing method includes two kinds of pouring and foaming technology and bonding technology. [0003] The perfusion foaming process is to pour the polyurethane foam liquid into the closed cavity formed by the skeleton and the inner and outer skin layers through a high-pressure perfusion foaming machine, and then integrate the skeleton and the skin connection layer. The perfusion foaming process relies on the adhesive force of the polyurethane material...

AI Technical Summary

Problems solved by technology

[0005] CN 2799229 Y discloses a kind of stitched lattice composite sandwich panel, CN 103643762 A discloses a sandwich panel with stealth and heat preservation performance and its production method All adopt the bonding process, which has the following disadvantages: there are many processing procedures, and there are high requirements for the processing accuracy of foam, skin and skeleton; the molding equipment has high requirements for precision and automation

[0006] There are deficiencies in the shelter made by the traditional method: 1) The two processes of pouring and bonding are only suitable for making flat and small folded plates

2) The metal skin used is easy to corrode, has poor resistance to salt spray and heat and humidity

3) The cabins made by these two processes have high surface density and low load ratio

4) The traditional shelter is composed of wall panels and corner fittings, which has poor sealing performance, stress concentration at the joints, and is easy to damage and leak

5) The traditional pouring foaming or bonding forming process is not suitable for making special-shaped cabins, because not only the inner and outer skin layers and skeletons are difficult to form, but the surface of the cabin after production is poor in appearance, and the weight index far exceeds the technical index requirements

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