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Active Member
titawu
Posts: 8
Registered: ‎09-16-2012

Why the clamp force is very high when using pinpoint gate?

201 Views, 2 Replies
09-16-2012 09:22 PM

I have done a simulation which the part is using pinpoint gate for injection molding. The clamp force reached to 5 tonne. Usually with normal size gate, the clamp force is about 0.5 tonne.

 

How to explain this phenomenon? Thanks!

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Product Support
nordhb
Posts: 453
Registered: ‎03-23-2009

Re: Why the clamp force is very high when using pinpoint gate?

09-20-2012 02:21 AM in reply to: titawu

Hi,
this is diffcult to say as no information on study and process settings.
Is this 3D or Dual Domain/Midplane study?

 

Seems to be a cavity pressure difference when using gate location only comparing adding runner system.
Is the fill time of cavity the same when using gate location only compared with study having runner system?

Is there an unbalanced fill, causing peak pressure, and peak clamp force?

When does clamp force starts to raise, early or late in filling phase?

Is the switch over too late?
Compare pressure build up in cavity when using gate location only compared with study having runner system.


Regards,

Berndt



Berndt Nordh
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Active Member
titawu
Posts: 8
Registered: ‎09-16-2012

Re: Why the clamp force is very high when using pinpoint gate?

09-21-2012 05:25 AM in reply to: nordhb
Spoiler
 

Dear Nordhb,

 

Thank you for your reply.

 

This is a 3D study. Yes, there is peak pressure and clamp force at late filling phase. In the early phase, it is filling the runner system.

 

I will try the simulation when using gate location only and later feed back to you.

 

Thank you very much!

 

Best regards,

titawu

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