汽车前保险杠顺序注射模流分析与工艺优化

摘要

In order to study the sequential injection molding technique for injection-molded auto front bumpers,Moldflow software combined with pneumatic sequence valve technology was used to simulate the injection and cooling systems,and the positions of cavitation and weld line were forecasted.The sequential injection molding through 10 pin-point gates was simulated by Moldflow software.It was found that a mould locking force of more than 1820 tons and a reynolds number of 1000 were required in this injection molding technique.The auto front bumpers were produced on the basis of the above simulation optimizations.Theresults indicated that the sequentially injection molded auto front bumpers exhibited a good injection balance,good appearance quality and high production effidency.%针对某汽车前保险杠注射成型工艺问题,采用Moldflow软件并结合气动控制顺序阀技术,模拟分析了注塑浇注系统与冷却系统,预测了气穴和熔接痕位置;实现了熔体从10个点浇口先后进行顺序填充型腔,锁模力要求大于1820 t,冷却水雷诺系数(Re)大于10000;在模拟优化的基础上进行了试模生产.结果表明,产品进浇平衡,外观品质好,生产效率得到明显提升.