基于综合加权评分法的加速度传感器端盖注塑优化

Optimization of Injection Molding of Acceleration Sensor Cap Based on Synthetic Weighted Mark Method

基于Moldflow软件对传感器端盖的注塑成型进行模拟,并利用正交试验及综合加权评分法探究工艺参数的优化方案。初始工艺结果显示:最大翘曲变形量、缩痕估算及质量均不满足设计指标要求。通过正交试验并分析综合加权评分结果,得到各工艺参数的影响程度排序为:注射速度>模具温度>熔体温度>保压压力>v/p切换体积。考虑各工艺参数的影响程度,得到优化工艺参数为A2B2C1D4E2,即注射速度为45%最大速度,v/p切换体积为98.5%,熔体温度为295℃,模具温度为150℃,保压压力为15 MPa。优化工艺的模流分析结果显示,最大翘曲变形量、缩痕估算及产品质量均满足设计指标要求。仿真模拟及实际试模结果验证优化工艺应用于实际生产的合理性。

The injection molding of sensor cap was simulated based on Moldflow software, and the optimization scheme of process parameters was explored by orthogonal test and synthetic weighted mark method. The results of initial process parameters show that the maximum warpage deformation, shrinkage estimation and mass can not meet the design requirements. Orthogonal tests were designed to compute the synthetic weighted value. The influence degree of each process parameters on the synthetic weighted value is sorted as: injection speed>mould temperature>melt temperature>holding pressure>v/p switching volume. Considering the influence degree of each process parameter, the final optimal process parameters are A2 B2 C1 D4 E2, injection speed is 45%, v/p switching volume is 98.5%, melt temperature is 295 ℃, mould temperature is 150 ℃ and holding pressure is 15 MPa. The results of the simulation of the optimized process show that the maximum warpage deformation, shrinkage estimation and mass can meet the design requirements.The simulation and actual molding test results verify the rationality of its application to actual production.