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Member
mjsainato
Posts: 3
Registered: ‎09-13-2013

Warp Question

193 Views, 1 Replies
09-13-2013 11:33 AM

We are running a simulation on an injected part and know from experimental data that the outside surfaces shrink differently than the inside. We are assuming that since the part is held on the core that the majority of the shrinkage is occuring on the cavity side.  I know you can use anchors to set an anchor plane, but the surfaces are cylindrical.  Is there a way to set up a warp analysis that would show the different rates of shrink between the inside wall and the outside wall on cylindrical parts?

 

Not sure I explained this wel enough, and not even sure it is possible using Insight....

 

Thanks,

Mike

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Employee
Alex.Bakharev
Posts: 42
Registered: ‎04-10-2013

Re: Warp Question

09-13-2013 03:28 PM in reply to: mjsainato

The effect of difference in shrinkage between the inside and outside molding surfaces on warpage is named "Differential shrinkage effect" in Moldflow language. In linear midplane and shrinkage simulations you can plot this result separately in other simulations it is not plotted but it is here.

 

Usually the differential shrinkage effect is predicted from the differences in mold temperature so it requires prior cooling analysis.

 

On cylindrical surfaces and corners difference between in-plane and thickness shrinkage leeds to some additional coreners. In Moldflow language it is called "corner effect".

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