Preparation method of ultra-light sandwich structure composite material

Abstract

Disclosed is a preparation method of an ultra-light sandwich structure composite material. The method comprises the steps that a hot melting prepreg material is prepared; then, the prepared hot melting prepreg material is laid according to the preset paving direction and paving layers, and a laminate preform body is obtained; then, the surface of a curved metal mold is paved with metal barrier strips, the metal barrier strips and a metal mold are fixedly connected mechanically, and then, the laminate preform body is laid on the side face flanges of the barrier strips; then, a coating for an opening honeycomb with the density being 30-50 kg / m<3> coats the surface of the laminate preform body, and then the honeycomb is paved with the hot melting prepreg material; finally, the preform body is sealed by adopting a silicone rubber sealing strip, curing is performed for 2 h under the temperature of 130 DEG C, and the ultra-light sandwich structure composite material is obtained. According to the method, the weight of the product is lowered, the problem that the honeycomb on the side face is exposed is solved; meanwhile, the skin can be effectively prevented from warping, and the phenomenon that honeycomb cores in a local area are sunken is avoided.

Description

technical field [0001] The invention relates to a forming process method of non-metal / composite materials. Background technique [0002] In the past ten years, the rapid development of materials and process technology has promoted the replacement of structural components such as aerospace weapons, carrier models, space stations, and aircraft from metal to composite materials, achieving a qualitative leap in weight control. The successful application of honeycomb and foam sandwich structure composite materials is a milestone in the development history of lightweight high-strength composite materials, and has been widely used in aerospace. Space station interior panels are the product of the rapid development of this technology. Conventional space station interior panels are mostly in the form of flat panels, which are developed using a honeycomb sandwich composite skin scheme, which has passed the assessment of various tests. [0003] Despite this, the development of space s...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a new type of preparation method for ultra-light honeycomb sandwich structure composite materials, and to realize the integration of upper and lower ultra-thin skins and side flanging through technical improvement , not only reduces the weight of the product, but also solves the problem of honeycomb exposure on the side; adopts the quasi-isotropic ultra-thin skin sandwich structure, which solves the problem that the conventional skin sandwich structure cannot meet the size and curvature accuracy requirements of the ultra-thin variable curvature sandwich structure It can effectively prevent the warping of the skin; in the preparation process of the inner core of the sandwich structure, by slotting the surface of the honeycomb, there is an air guide channel in the composite material to balance the internal and external pressure, and the honeycomb and the mask The skin bonding is bonded in a certain order to prevent the collapse of the honeycomb core in a local area

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