PVC检查井热流道单浇口阀式注塑成型

Hot runner single pouring valve injection molding for PVC inspection well

在分析市政塑料检查井组成结构和注塑工艺性能的基础上,针对传统注塑模具浇注系统的单浇口和多浇口控制中存在的问题,论述了塑料检查井注塑模具热流道单浇口阀式浇注系统及其应用,介绍了热流道单浇口阀式浇注系统的工作原理、结构和设计特点,并采用moldflow软件分析浇口位置、浇口数量和浇口直径等对聚氯乙烯熔体充填和成型质量的影响。经生产验证,单浇口阀式浇注可以提高聚氯乙烯检查井成型加工效率和降低生产成本。

This paper describes the hot runner single pouring valve injection molding system for plastic inspection well along with its application,which is based on the analysis of structure and injection molding process of the municipal plastic inspection well and control issues in single and multiple gates of traditional injection mold gating system. The design features, operating principles and structures of the system are introduced in detail. The impacts of location, number and diameter of the gate on melt filling and molding quality are investigated via Moldflow. The practices show that the single pouring valve injection can improve molding efficiency of polyvinyl chloride inspection wells and reduce production costs.