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Material change | Event handler | heat transfer
Posted Apr 29, 2017, 5:11 a.m. EDT Heat Transfer & Phase Change, Materials Version 5.2a 0 Replies
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I'm trying to improve my first simulation of an injection mold. In the simulation I'm studying the heat flow within the injection mold. For that I have the plastic article as a solid domain inside the cavity and with the ODE explicit Event I'm changing the temperature every 25 seconds to 533 K to simulate the injection of new molten plastic. This cyclical heat injection works very well and all other components work too.
But I have problems in simulating the ejection of the plastic article. After the molten plastic is injected und cooled, the article gets ejected.
In order to simulate this event I tried to switch the domain material to "air" and switching it back to "polycarbonate" after 4 seconds. This should simulate the heat transfer situation in the time when there is no plastic inside the cavity. Probleme here is that I can't configure the explicit event to do so. I guess the only variable that can be used there is the temperature "T". I also tried a piecewise function for the polycarbonate material properties rho, Cp and k but I didn't get it to work.
Is there a way to switch the material properties over time (rho, Cp, k) or do someone know an even better way to simulate the ejection process and the hollow cavity?
Thank you very much for support.
Best rigards
MHüttemann
Hello M. Huettemann
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