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1·The matching areas of hot runner system and mold are reduced and pipe connection is adopted for pneumatic / hydraulic & cooling which make mold design and machining simpler.

热流道系统与模具配合部分减少，气路、油管、冷却采用管道连接，模具设计加工更方便、更简单；

2·The present work considers the spiral case as branch-off pipe system that diverts part of the flow consecutively as it goes around the periphery of the runner.

本文将蜗壳看作沿转轮四周连续分流的分叉管系统，应用水力瞬变中的叉管理论推出一种能计及蜗壳各断面水锤效应，并使仿真计算更接近实际情况的新方法。