Moldflow Insight Forum
Welcome to Autodesk’s Moldflow Insight Forums. Share your knowledge, ask questions, and explore popular Moldflow Insight topics.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Temperature at flow front query

3 REPLIES 3
Reply
Message 1 of 4
nachal20
541 Views, 3 Replies

Temperature at flow front query

Hi I have a query temperature at flow front

 

used D mesh, material is PP 

 

use film gate at 4 directions, model's thickness is 0.4t, gate thickness is 0.2t 

 

so, attached photo

 

I can't understand temperature distribution. 

 

Is it because of No Flow Temperature?  This material's T(transition) is 116.9 Celsius. 

 

But, temperature has not 116.9 Celsius area. 

image 48.jpg

3 REPLIES 3
Message 2 of 4
pushkar.tagde
in reply to: nachal20

Hello,

 

This is typical problem for Moldflow to predict exact flow behavior for complex part with thin areas like grills considering dual domain mesh model.

In this case, we have many flow fronts and lots of flow hesitation due to thin areas. We need to predict exact flow behavior specifically to check temperature of flow front and short shot determination.

 

To be on safe side during analysis and predict better results, I suggest to make fine mesh & reduce part thickness in this area manually like 0.8mm or 1mm, (else you can use shape factor to calculate exact thickness), if your product is OK for this reduce thickness with fine mesh (minimum two or three set of elements in thin areas), we can say, part will fill without any problem in real life.

 

Please consider good material grade & optimum process setting during analysis, so that your results will be close to reality.

 

Hope it solves your problem.

 

Thanks and Regards,

Pushkar Tagde

 

Thanks and Regards,
Pushkar Tagde
+91-9960455178
Message 3 of 4
tim.vanast
in reply to: pushkar.tagde

You could create a 3D mesh from the dual-domain mesh and run it that way.  That would properly catch the heat loss from the grill area.  If you must stay with a dual domain mesh, you could create the grill area from beams with the correct shape assigned to them.

 

Tim

Message 4 of 4
prakash.p
in reply to: nachal20

Hello @nachal20

 

The Temperature at flow front result, which is produced by a Fill analysis, shows the temperature of the polymer when the flow front reaches a specified point in the center of the plastic cross-section.

 

You have to check Bulk temperature which is the temperature of polymer melt changes not only with time and location, but also with thickness during the entire injection molding cycle. It is difficult to illustrate all these changes in a single display. For these reasons, Bulk temperature is used. Bulk temperature has more physical significance than Temperature at flow front.

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report