基于Moldflow的汽车保险杠注射成型分析

Analysis of Injection Molded Automobile Bumpers Based on Moldflow

利用Moldflow软件,采用扬子石化的汽车保险杠专用料高抗冲聚丙烯K9015,对威姿轿车前保险杠比例缩小模型进行了填充、保压、冷却以及翘曲模拟分析,讨论了2种浇注系统方案及产品产生翘曲变形的原因。结果表明,2种进胶方案的注射时间基本相同;采用3个浇口在一侧的进胶方案得到的制品外观质量更好,装配尺寸更合适;但2种进胶方案都会产生较大的翘曲变形,通过优化保压曲线可以减少制品的翘曲变形量。

Based on Moldflow software, the filling, packing, cooling, and warping of a front bumper were simulated using a scaled down model. The used material was high impact polypropylene K9015 provided by Yangzi Petrochemical. The reason causing warping was explored with two injection schemes. It showed that the injection times were the same for the two schemes. When the three gates were located on the same side of the product, better quality of appearance and more accurate assembly were obtained. Both schemes caused large warpage, however, which could be reduced by optimizing the packing curve.