underfeed

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

在点浇口形式模具或无流道模具中也用到另一种形式流道。

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

流道拉杆头部凹槽形成了一个有效底切，可用来拉出流道或者是下进设计中二级流道。