Abstract
Compared with autoclave curing process, microwave can cure the composite with high quality, short time and low cost. However, the temperature distribution of the composite is uneven during microwave heating, which seriously hampers the industrial application of the microwave curing technology. In order to solve the problem, this paper presents a method for improving the temperature distribution of the composite during microwave curing using time-varying electromagnetic field. The method can achieve a real-time and automatic power adjustment of multiple microwave sources via LabVIEW program, and generate a large number of electromagnetic field modes in the high-performance microwave cavity. The temperature distribution is improved by the compensation effect between the heating patterns corresponding to different kinds of resonant states during microwave curing. Experimental results show that the time-varying electromagnetic field in the microwave cavity can effectively improve the temperature distribution of the composite. Compared with rotating tray adjustment, the method proposed can greatly improve the temperature distribution.
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