A modified form of sprue gate is also used on underfeed moulds and runnerless moulds.

在点浇口形式的模具或无流道模具中也用到另一种形式主流道。

The grooved head of the sprue puller creates an effective undercut which is used to pull the sprue, or secondary sprues in underfeed designs.

主流道拉料杆头部的凹槽形成了一个有效的底切，可以用来拉出主流道或者是下进料设计中的二级主流道。

In this paper, the arrangement of cavities, the dimension calculation of sprues and gates and the method of mold-testing for a special hooks multi-cavitis plastic injection mold are introduced.

本文以塑料扣码为例介绍了多腔注射模浇注系统设计中型腔的排布、非平衡排布时欲达到同时充满型腔浇口尺寸的计算及调试。