topic Re: Explain analysis sequence in Moldflow Insight Forum

Explain analysis sequence

Anonymous — Thu, 15 Jul 2010 05:39:50 GMT

Dear Friends,

I am Inba from Rober Bosch, India,

could you please explain the following analysis sequence,

Cool+Fill+Pack+Warp

Fill+Cool+Fill+Pack+Warp

Re: Explain analysis sequence

JCourter — Fri, 16 Jul 2010 12:42:59 GMT

Hi Inba,

The primary difference between the two analyses you list is the part temperature recognized during the cooling analyses. Because the cooling analysis is a steady state analysis, it associates a value for the temperature of the part cavity.

If you run cool+fill+pack+warp it will assume that during the cooling analysis that the part exists in the cavity completely filled and at melt temperature. It will then calculate the temperature of the tool and the effect on the part based on your cooling design. It will then run the fill and pack analysis filling your part and finally the warp to calculate deflection based on existing stresses and shrinkage during the previous analyses.

If you run fill+cool+fill+pack+warp the only difference is the temperature assigned to the part cavity in the cooling phase. Rather than running with a universal melt temperature for the whole cavity, it runs a fill analysis to calculate the temperature of the part in different regions and applies that. It provides a higher level of refinement for the analysis, but in many cases the temperature difference overall is so small it's negligible.

-Justin

Re: Explain analysis sequence

Anonymous — Tue, 27 Jul 2010 04:45:17 GMT

Dear Justin,

Which is recommended cool+fill+pack+warp or fill+cool+fill+pack+warp. Do we observe major changes in results for the analysis sequence.

Regards,

Rajesh Kumar P V

Re: Explain analysis sequence

JCourter — Tue, 27 Jul 2010 14:50:51 GMT

Hello Rajesh,

It typically has very little effect. The additional time and hardware required sometimes may not offset a slight change in results.

That said, it's possible that certain scenarios will provide a significantly different temperature across the part due to unique geometry, feed system, or material temperature sensativity that running the fill+cool+fill+pack+warp would be best to capture these temperature differences.

The general recommendation though is that cool+fill+pack+warp is sufficient in the majority of analyses.

-Justin

Re: Explain analysis sequence

Anonymous — Wed, 28 Jul 2010 04:13:28 GMT

Dear Justin,

Thanks for the information. It looks pretty good and cool+fill+pack+warp can be preferred.

Regards,

Rajesh Kumar P V