Q&A: What is the typical time for a mold to open/close in an injection molding process?
November 10th, 2011 | 
Author: Question by Will: What is the typical time for a mold to open/close in an injection molding process?
The mold is relatively small. It is only a 3 or 4 inch cube. Even a rough estimate will be fine. I’m looking for the time it takes the mold to open. And the time it would take to eject a simple part would be great too. I’m assuming it’s only a couple seconds but any help would be much appreciated. Thanks!
I don’t have the machine. This is for a school project.
I don’t have an injection molding machine. This is for a school project.
Best answer:
Answer by Sexy Homer is back!
Why not just power it up and time it for yourself?
The specifications sheet that came with the device should tell you.
Know better? Leave your own answer in the comments!
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Injection moulding cycle times differ a lot depending on the size of the press, mould, resin moulded, if you use an extraction robot, stack moulding, etc. etc. If your mould is a 4″ cube, then it is a tiny little thing that can be used as a paperweight 😉
I would suppose that you would be running this on a small 5 or 10 ton press, so the times (approximate for a toggle press) would be:
Opening: 3 seconds
Ejection: 1 second (no robot, just simple ejection + gravity)
Closing: 2 seconds
Hope this helps.