基于Moldflow的拉链链牙成型工艺参数优化

Analysis and Optimization of Zipper Chain Tooth Forming Process Parameters Based on Moldflow

针对拉链链牙注塑工艺参数对成型质量影响较大的问题,分析了拉链链牙的结构特征,利用Moldflow软件对拉链链牙进行模流仿真分析,发现,翘曲变形是影响链牙成型的重要因素。以链牙X方向的最大收缩变形为优化目标,注射时间、熔体温度、保压时间、模具温度为试验因素,进行4因素4水平正交试验,对试验结果进行经极差与方差分析,得到上述工艺参数与收缩变形量的影响关系,并选出一组最优的工艺参数组合为注射时间为2 s,熔体温度为195℃,保压时间为2.5 s,模具温度为70℃。经仿真验证,优化后,X方向最大收缩变形降低了8.09%。通过实验验证,优化工艺参数可有效改善链牙注塑成型质量。

Aiming at the problem that the injection molding process parameters of the zipper chain teeth have a great influence on the molding quality,the structural characteristics of the zipper chain teeth were analyzed,and the moldflow simulation analysis of the zipper chain teeth was carried out by using Moldflow software,and it was found that warpage deformation was an important factor affecting the forming of the chain teeth.Taking the maximum shrinkage deformation in the X direction of the chain teeth as the optimization goal,the injection time,melt temperature,holding pressure time and mold temperature as the test factors,the four⁃factor four⁃level orthogonal test was carried out,and the influence relationship between the above process parameters and shrinkage deformation was obtained by range and variance analysis of the test results,a set of optimal process parameter combinations were selected injection time 2 s,melt temperature 195℃,holding pressure time 2.5 s,mold temperature 70℃.Simulation results show that the maximum shrinkage deformation in the X direction was reduced by 8.09%after optimization.Through experimental verification,the proposed optimized process parameters could effectively improve the quality of chain tooth injection molding.