Novel foam-filled honeycomb sandwich board

Abstract

The invention discloses a novel foam-filled honeycomb sandwich board, the structure of which comprises a pyramidal honeycomb core, rigid polyurethane foam and panels clamping both sides of the rigid polyurethane foam. Mould pressing, rolling and other methods are utilized to process a whole board / sheet into a latticed supporting body-shaped core board as the pyramidal honeycomb core with a series of staggered concave-convex truncated pyramids on both sides, a V-shaped groove can be formed at the joint between the slanted arrises of neighboring raised truncated pyramids, so that the notches of the truncated pyramids on the core board are communicated with one another, moreover, the vertex of each truncated pyramid body is a small plane, so that the panels on both sides can be conveniently bonded, and the rigid polyurethane foam plastic is filled in the clearance of the pyramidal honeycomb core between the panels on both sides. The produced novel foam-filled honeycomb sandwich board has all the advantages of the honeycomb sandwich board and the foam sandwich board, and is a novel composite-structured board with the advantages of reasonable structure, excellent performance, light weight, high strength and simple and easy production technique, which can be widely applied in various fields such as aeronautics and aerospace, vehicles, ships, furniture and buildings.

Description

technical field [0001] The invention relates to a composite material, in particular to a honeycomb sandwich panel filled with rigid polyurethane foam. Background technique [0002] Existing composite material sandwich panels are mainly divided into two types: honeycomb sandwich panel and foam sandwich panel. Honeycomb, etc., the core material of the latter is mainly rigid foam. The two materials have many advantages of "light weight and high strength", and have been widely used in all walks of life and people's daily life. However, there are also some defects in use, such as the complex manufacturing process of the former, easy instability, poor bonding performance with the panel, and poor fatigue resistance. The advent of the latter makes up for some defects of the honeycomb sandwich panel, but the shear strength and stiffness of the foam sandwich panel are lower than the honeycomb sandwich panel. These defects limit and affect its popularization and application in load-...

AI Technical Summary

Problems solved by technology

However, there are also some defects in use, such as the complex manufacturing process of the former, easy instability, poor bonding performance with the panel, poor fatigue resistance, etc.

The advent of the latter makes up for some defects of the honeycomb sandwich panel, but the shear strength and stiffness of the foam sandwich panel are lower than those of the honeycomb sandwich panel.

These defects limit and affect its popularization and application in load-bearing structures to varying degrees.

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