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Contributor
nilza.reis
Posts: 20
Registered: ‎05-16-2012

Micro injection

170 Views, 2 Replies
02-10-2014 06:57 AM

 

Hi!

 

I have a part, micro part with diameter 1.0mm; is it possible to simulate this mould in Moldflow Insight 2013?

 

There is a specific module….

 

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

Re: Micro injection

02-14-2014 07:23 AM in reply to: nilza.reis

There should be no problem with running it in Moldflow.  I've run a few micro parts before and it worked well.  I don't remember trusting the injection pressure numbers, but the filling pattern made sense.

 

Tim

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Board Manager
raalteh
Posts: 258
Registered: ‎04-14-2009

Re: Micro injection

02-14-2014 10:21 AM in reply to: tim.vanast

One challenge with micro-molding is understanding what is actually happening in reality. Typically the molding process is very fast, and the machines may not be responding as quickly as you anticipate. If you for instance specify an injection speed of 0.1 second, the machine will need some time to accellerate over a very short distance, and as a result the screw will probably not accellerate (and decellerate) very linearly. Measuring the actual screw speed over a short distance is not very trivial. Also the inclusion of venting in the mold can be important.

 

Within Moldflow we don't know the machine characteristics, so the assumptions are that they are 'ideal'. At the university of Danmark they did some work that was published in this paper (I believe there are more).

 

I hope this helps

 

Hanno

Hanno van Raalte,

Product Manager for Autodesk Simulation Moldflow products
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