塑料注射成型中注射压力和熔体温度的快速预测

从黏性流体力学的基本方程出发，引入相关假设与简化，提出一种简化的注射流动计算模型，并采用有限差分法进行求解。在给定工艺参数（注射时间、注射温度、模具温度等）的条件下，该模型能快速、有效地预测塑料注射成型过程中的注射压力和最低熔体温度。最后，以一个数值算例来验证本文建立的预测模型和求解算法，其预测的注射压力和温度与CAE分析结果基本吻合，存在一定误差，而计算时间仅为CAE分析的0．03％。

Fast Prediction of the Injection Pressure and Melt Temperature during Injection Molding

A simplified flow model was presented according to some assumptions based on mechanics equations for viscous fluid. The minimal melt temperature and injection pressure can be predicted very quickly by solving the model using finite difference method when injection time, injection temperature, and mold temperature were assigned. Finally, a numerical example was studied. The results of the simplified flow model were approximately identical to that of detailed CAE analysis, indicating that the presented model is correct and valid, but the presented model spends 0.03 % time of CAE.