Honeycomb sandwich panel with skin and preparation method thereof

Abstract

The invention discloses a skin honeycomb-core board and a preparing method thereof. The skin honeycomb-core board comprises upper skin, upper surface glue, a honeycomb core, lower surface glue and lower skin, wherein the upper skin, the upper surface glue, the honeycomb core, the lower surface glue and the lower skin are sequentially arranged from top to bottom. The shape of the lower surface of the upper surface glue is correspondingly coincident with the shape of the upper surface of the honeycomb core, and the shape of the upper surface of the lower surface glue is correspondingly coincident with the shape of the lower surface of the honeycomb core. The preparing method includes the following steps of 1, coating the lower surface of the honeycomb core with first binding glue in a rolling manner; 2, pre-binding the honeycomb core and the lower skin; 3, coating the upper surface of the honeycomb core with second binding glue in a rolling manner; 4, pre-binding the honeycomb core and the upper skin; 5, carrying out heating curing. The skin honeycomb-core board is low in mass and cost, the skin and the honeycomb core are tightly attached, and reliability is high; by means of the preparing method, the weight of the skin honeycomb-core board can be reduced, and cost can be saved.

Description

technical field [0001] The invention belongs to the field of composite material sandwich panels, in particular to a skinned honeycomb sandwich panel and a preparation method thereof. Background technique [0002] The skinned honeycomb sandwich panel is composed of two thin and strong skin materials sandwiched by a thick and extremely light honeycomb core. The skin is required to be thin and strong, and it is the main stress-bearing part of the sandwich structure. According to different materials, the honeycomb core can be divided into paper honeycomb, glass cloth honeycomb, cotton cloth honeycomb and aluminum alloy honeycomb, etc. It plays the role of connecting and supporting the skin in the sandwich structure. The biggest feature of this kind of material is light weight, high specific strength and specific stiffness. Honeycomb sandwich panels are widely used in aerospace, shipbuilding and construction industries due to their excellent electrical insulation and electromag...

AI Technical Summary

Problems solved by technology

[0003] Conventional skinned honeycomb sandwich panels have a relatively small proportion of adhesive glue and the coating process is difficult to control. Therefore, the current glue coating process is to glue the honeycomb core and skin by applying the entire surface glue or the whole glue film. combine

However, with the further demand for light weight in some special fields, the existing preparation methods of skinned honeycomb sandwich panels are difficult to meet the development needs

For example, when the skin honeycomb sandwich panel is used for the flexible solar cell support and heat insulation substrate of high-altitude aircraft, the weight requirement is high, the skin and the honeycomb core will choose lightweight materials, and the adhesive glue of the conventional coating process The proportion of weight is too large, and the weight of the entire adhesive or the entire adhesive film even exceeds the total weight of the honeycomb core and skin, which cannot meet the requirements of light weight skin honeycomb sandwich panels in special fields

Images