Re: Circles in Plastic Castings


Richard Brennan
 

At 09:43 AM 8/7/2016, chris_hillman@... [STMFC] wrote:
Just a question here. Nothing we can do about it except fill them in but, why are there small circular holes or impressions in various plastic castings? They can't be for material-flow in the casting process ???
Ejector pins...
without them... it would be extremely difficult to get the warm injected part out of a complex mold.

Description at: https://www.protolabs.com/resources/injection-molding-design-tips/united-states/2010-06/


--------------------
Richard Brennan - San Leandro CA
--------------------

Join main@RealSTMFC.groups.io to automatically receive all group messages.