薄壁深孔复杂壳形塑件的多目标注塑工艺参数组合设计

Design of multi-objective injection molding process for thin-walled and deep-bored complex shell-shaped parts

利用Pro/E软件进行三维建模,然后采用计算机辅助工程(CAE)的Moldflow软件进行有限元模流仿真分析。通过实验设计(DOE),对每个方案进行Moldflow分析,研究了熔体温度、模具温度、注射压力、保压压力、保压时间对复杂壳形塑件翘曲变形、体积收缩变形的影响,并进行工艺参数组合的优化,获得了翘曲变形和体积收缩变形最小时的最佳工艺参数组合。结果表明:与默认工艺参数相比,翘曲变形量减少了62.28%,体积收缩率降低了37.74%;CAE+DOE可以有效针对实验指标结果进行注塑工艺参数优化,避免了大量无序摸索,缩短了生产周期,提高了生产效率。

Three-dimensional modeling for thin-walled,deep-bored complex shell-shaped plastic parts was carried out with Pro/E software,whose finite-element flow simulation analysis was carried out by Moldflow software of computer aided engineering(CAE) analysis.The influence of melt temperature,mold temperature,injection pressure,dwell pressure and dwell time on the volume shrinkage deformation and warping deformation were observed by design of orthogonal experiment (DOE) and the mold-flow analysis for each scheme.The optimal combination of process parameters with minimum warping deformation and volume shrinkage deformation was obtained.The results show that the warping deformation and volume shrinkage deformation are reduced by 62.28% and 37.74% than those default parameters.CAE+DOE can be used to optimize the injection molding process parameters effectively according to the test results,avoiding a lot of disorderly grouping,shortening the production cycle and improving the production efficiency.