SINO PK is specialized in different kinds of cap molds manufacturers, such as water bottle cap mould, oil bottle cap mould, flip top cap mould , push-pull cap mould etc. SINO PK has own technical department which engaged in advanced cap mould technical researching work.

Below is simple introduction about the topic “what is second ejection cap mould”.

Before the mould opening, the green rod will do the return back first. And the undercut will shrinkage to make the purple part space become bigger. Just because of this shrinkage effect, the purple water seal ring part has more space, and when the stripper start moving, the undercut will not be pulled. 

If you need more detail information about second ejection cap mould structure,welcome to send me e-mail.