矩形腔中反应注射充模过程的数值模拟

<正>1 引言 反应注射充模（RIM）是由聚氨酯工艺发展起来的新型塑料成型方法,它具有模腔压力和进料温度低、节能、模具设备简单和产品性能优良等众多优点,特别适于生产大型塑料制件。近年来国际上已大量开展相关过程的流动和传热的数值模拟研究,以发展此一成型工艺的CAD/CAE工作。本文拟在过去对热注射充模（TIM）过程的流动和传热数值模拟研究的基础上,参考国外近年在RIM数值模拟方面的成就,对典型的端面进料矩形腔内RIM过程进行数值模拟研究。

NUMERICAL SIMULATION OF REACTION INJECTION MOLDING (RIM) PROCESS IN A RECTANGULAR THIN CAVITY

Fluid flow,heat transfer and reaction during filling in a rectangular thin cavity for RIM process is numerically simulated. Fountain flow behavior in the flow front region is considered in the mathematical model, where moving coordinates and grids slicking on the flow front are adopted to simplify the calculation procedure. The predicted numerical results coincide well with the experimental data from Castro and Macosko. Some useful conclusions are obtained from numerical study.