基于Moldflow的注塑模流道平衡设计与分析

Balancing Design and Analysis of Runners of Plastics Injection Molds Based on Moldflow

以手机前盖及前饰板两个非等体积塑件一模多腔结构为分析实例,阐述在不同体积型腔的一模多腔模具流道设计中,利用Moldflow软件对不同流道的设计进行对比分析。主要对比分析了3种典型的浇注方式对注射时间、转换压力及锁模力3个要素的影响,再根据产品的需求选择合适的流道设计,最后利用分析出的两腔填充时间比值确定产品流道截面的尺寸,优化了分流道,使塑件的填充达到了流动平衡,尽可能减小了塑件的缺陷。

Injection molding of front cover and front panel of mobile phone with different volume two-cavity is regarded as the research object , based on numerical simulation software MPI ,the study is distributed into the contrastive analysis of different runners. The influence of three typical injection on three important process factors , such as injection time,conversion pressure and clamping force are analyzed, then the appropriate runner design is selected according to the demand for products, at last the runner size is ascertained based on the ratio of two cavity filling time . Optimization of the runner makes the melt flow into the volume cavity keep flow balance and minimize the shortcomings of parts.