基于UG和Moldflow的阀座注塑成型模拟及工艺优化

The Valve Seat Injection Molding Numerical Simulation and Process Parameters Optimization Based on Moldflow and UG

根据阀座的结构特点,构建了制品的CAE分析模型。利用Moldflow软件对其进行注塑成型数值模拟,以阀座体积收缩率和翘曲变形量为质量评价指标,从影响塑件质量的多个因素中选择模具温度、熔体温度、填充时间、冷却时间、保压时间、保压压力6个因素设计了DOE正交试验,确定出对指标影响较大的4个因素。设计田口正交实验分析这4个因素对指标的影响,优化出注塑工艺参数:熔体温度为270℃,模具温度为70℃,冷却时间为20 s,保压压力为注射压力的90%。对优化结果进行CAE分析验证,效果良好,实现了制品质量指标的多目标优化。利用UG软件设计并制造出阀座注塑模具,生产出合格产品,验证了模拟结果的正确性。

According to the structural characteristics of valve seat,the product CAE analysis model was built. Moldflow software was used for numerical simulation of injection molding,and the volume shrinkage and warping deformation of the seat were taken as quality evaluation indexes;the melt temperature,mold temperature,filling time,cooling time,holding pressure and holding time six factors were chosen to design the DOE orthogonal experiment and the four factors that had a greater impact on the index were determined. Taguchi orthogonal experiment was used to analysis the influence of these four factors on the index,so the optimized injection process parameters were obtained: melt temperature was 270 ℃,mold temperature was70 ℃,cooling time was 20 s,holding pressure was 90% of the filling pressure. The optimization results with good results were verified by CAE analysis,the multi-objective optimization for the products quality indicators was achieved. Using UG software,the injection mold of the Valve Seat was designed and manufactured and the qualified products were obtained,which verified the correctness of the simulation results.