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Active Contributor
lahkar
Posts: 48
Registered: ‎10-24-2010

How to design Overlap Gate in Moldflow Insight

505 Views, 5 Replies
09-24-2012 11:27 PM

Can anyone guide me to design Overlap Gate in Moldflow Insight. Is it possible to design? Why I asked because overlapping is not allowed in moldflow.

 

Please have a look at attached image for an example.

EDGE-GATE.JPG

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Valued Contributor
tim.vanast
Posts: 71
Registered: ‎07-17-2009

Re: How to design Overlap Gate in Moldflow Insight

10-01-2012 08:17 AM in reply to: lahkar

Overlapping is not allow in Moldflow because by it's definition it is two volumes on top of eachother.  In reality, you do not have two volumes overlapping.  So you just need to create a model that contains the correct volume for both the runner and part.

 

Are you modeling for 3d, dual domain, or midplane?

 


Tim

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Active Contributor
lahkar
Posts: 48
Registered: ‎10-24-2010

Re: How to design Overlap Gate in Moldflow Insight

10-15-2012 04:02 AM in reply to: tim.vanast

Thanks a lot, Tim!

I am modeling for Dual Domain.

Please drop some resolution. Can I design edge gate instead of Overlap gate?

 

Regards

 

Lahkar

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Valued Contributor
tim.vanast
Posts: 71
Registered: ‎07-17-2009

Re: How to design Overlap Gate in Moldflow Insight

10-15-2012 07:31 AM in reply to: lahkar

If it were me, I would model the gate in the dual domain mesh up to the full round runner.  That would make the gate to part interface more clear in the mesh. 

 

You could change to an edge gate if it's allowable by the part.  Unless you just want to model it as an edge gate to make it easier to model.  If so, you can certainly do that and your results should be very close for the part as a whole.  But if you're looking specifically at shear at the gate, it might be off a bit there.  It's possible that could affect your pressure numbers a bit if it's a shear sensitive material.

 

I hope this helps more than confuses.

 

Tim

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Board Manager
raalteh
Posts: 257
Registered: ‎04-14-2009

Re: How to design Overlap Gate in Moldflow Insight

10-15-2012 10:18 AM in reply to: lahkar

Hi,

 

Tim is correct that two volumes should not overlap in Moldflow, but I believe what you intend to do is not really have two entities overlap, but more account for the actual shape and size and shape of the gate. If you model the part and gate (and runner in 3D CAD), you can simulate what you want with the Insight 3D solution if you mesh part and gate (and possibly the runner system) in 3D). Using a beam gate or Dual Domain would not be a good solution.

 

Hanno

Hanno van Raalte,

Product Manager for Autodesk Simulation Moldflow products
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Active Member
nicola.pavan
Posts: 10
Registered: ‎02-10-2012

Re: How to design Overlap Gate in Moldflow Insight

10-22-2012 04:29 AM in reply to: lahkar

Hi Iahkar,

I never use overlap gate, not in my study at least.

 

If you are modeling the cold runner with beams, and you don't have to evaluate so accurately what is happening at the gate (but just pressure drop and shear rate) you can use edge gate.

I've found results very similar.

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