【摘要】 为充分发挥模具效能,提高生产力,降低单件成本,生产中经常使用一模多腔模具。优化分流道设计对模具来说是非常重要的。流道的主要作用是使熔体从喷嘴快速而顺畅地注入模具型腔内,微小塑件的注塑成型好坏很大程度上取决于流道的优化设计。笔者对微小塑件注塑成型过程中熔体流动充填过程进行了研究,一模四个微型型腔,分流道系统对称平衡布局,重点研究了熔融塑料充填过程中流道尺寸大小与温度、压力、保压时间及充填长度之间的关系。更多还原

【Abstract】 To increase productivity and reduce the unit cost,moulding tools with multiple cavities are often used.Optimal runner design is very important for achieving satisfactory moulding results.The main function of the runner system is to facilitate the flow of molten material from the injection nozzle into the mould cavity,and the injection filling process and high quality microparts depend on the optimal design of runner systems.In this paper, the filling performance of the injection moulding process of microparts were investigated.The moulding tool was manufactured with four micro cavities and the branches of the runner to each part were symmetrically balanced.The research focused on the relationship between runner sizes and melt temperature,pressure,holding pressure time and flow length.更多还原