A method for curing composite materials by using microwaves to heat wave-absorbing material molds

Abstract

A method of solidifying a composite material with a wave-absorbing material mould through microwave heating is disclosed. In the method, the wave-absorbing material mould is placed in a microwave field and the temperature of the wave-absorbing material mould is rapidly increased by means of a characteristic of quick and uniform heating of microwave, wherein generated heat is transferred to the composite material in the wave-absorbing material mould in a heat conduction manner, so that the temperature of the composite material is rapidly increased and the composite material is solidified. The method fully utilize the characteristic of quick and uniform heating of the microwave, which can significantly reduce required time of a conventional solidifying process of the composite material and increase production efficiency. Meanwhile, because that the microwave field does not act on a structural layer of the composite material, a problem of sparking in the microwave field of high-electric-conductivity fibers, such as carbon fibers and the like, can be avoided, so that the method not only is suitable for solidifying a low-electric-conductivity composite material such as glass fibers and the like, but also is suitable for solidifying a high-electric-conductivity composite material such as carbon fibers and the like, thereby solving a problem that the carbon fiber cannot be solidified through the microwave since the carbon fiber sparks in the microwave field.

Description

technical field [0001] The invention relates to the technical field of composite material manufacturing, in particular to a method for curing a composite material by using microwaves to heat a wave-absorbing material mold. Background technique [0002] Microwave has the advantages of fast heating speed, uniform heating, strong penetration, selective heating, and small thermal inertia. Applying microwave technology to the field of composite material curing can significantly reduce curing time, reduce production costs, and obtain excellent product performance. Has great potential for development. [0003] A lot of research has been carried out in the field of composite material curing at home and abroad, and fruitful results have been obtained. However, these studies have a common feature, the composite materials are all directly exposed to the microwave field to complete the curing. Microwave has the characteristics of volume heating. When this method is used to cure, all p...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method of using microwaves to heat absorbing material molds to solidify composite materials, which can inherit the advantages of microwave rapid and uniform heating. This method is not only suitable for glass fibers and other low It is suitable for the curing of composite materials with high conductivity such as carbon fibers, and solves the problem that carbon fibers cannot be cured by microwaves because they are ignited in the microwave field.

Images