Hi!
In the results of the studies, filling and packing, for example, the weight of the parts is different the reality.
Example: I have a part with 663cm3 - volume. The density of the material is 0.9g/cm3. Correct weight is 596.7g. Moldflow is 496.7g.
There is always a variation of 100g. Why?
I speak about the Moldflow Insight 2013.
Thank you.
Hi!
Thank you for your replies.
I use the same processing condition on the machine and the difference happens.
I use other software to calculate, for example, unigrafics and the weight of the parts are correct.
In unigrafics - correct weight
In reality - correct
In Moldflow - we have a difference of 100g.
The volume is correct in three cases. (unigrafics, reality and Moldflow)
1. try to add shrinkage to model and feed system and run the analysis, confirm whether it is matching expected weight .
2. Check the density plot if your running the analysis with 3d, whether the value is matching with your assumed density.
3. Try to over pack the part and check by increasing gate size and packing time.
Just reply, if you got any other reason.
Hi
Deviation in weight is mainly due to difference in volume of CAD model and FE model. It should be nominal and to reduce the difference have to over pack to achieve desired material density.
Regards
Aravind Halasur
It does seem strange that the weight doesn't match.
I would check the CAD volume vs the Moldflow mesh volume. If those match then I would check the density of the material in the database vs the data sheet.
And lastly, the calculated weight is affected, as stated above, by filling (short shot areas have no weight) and packing.
These things should add up to a correct (at least close) part weight.
Good luck.
Tim
Hi!
Thanks for the reply.
In all studies have found that weight in moldflow does not match the result density x volume. (I have Moldflow Insight 2013)
CAD 3D and Mesh are same volumes but diferrent results for weight.
I always show the result of the weight volumeXdensity.