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摘要
To improve the uniformity of mold temperature distribution during autoclave forming process and the quality of parts after curing, the short-cut CF/PC composite material which has the smaller thermal expansion coefficient difference with the composite material components was used as the mold material and the large-size frame mold was 3D-printed. The influence law of mold structure and process parameters on the temperature distribution uniformity of 3D printing mold surface was studied by numerical simulation, variance analysis and experiments. The results show that the smaller the thickness of the 3D printing mold surface is and the greater the wind speed at the entrance of the autoclave is, the more beneficial it is to improve the uniformity of mold surface temperature distribution. The maximum relative error of mold surface temperature between simulated values and experimental values is 6.7%, which verifies the high reliability of the simulation of temperature field distribution of mold surface in autoclave forming process by finite simulation method. At the end of heating up, the temperature of 3D printing mold surface is step distributed, and the low temperature area is easy to appear at the contact between the support lattice and the mold surface. ? 2022, Editorial Board of Journal of Plasticity Engineering. All right reserved.
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