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Core shift analysis_contact between Premold & metal lead frames

101 Views, 5 Replies
04/02/2018 1:39 PM

Dear all,

 

I am performing a core **** analysis for an overmolded cover part which has a plastic premold having 4 metal lead frames as inserts together. Based on reality, when the overmolded cover is filling there should not be any movement between the premold and metal inserts considering the certain constraints given to premold & metal inserts based on its fixed position in the mold.

 

After the core shift analysis when viewing the core displacement animation, the plastic premold is moving (penetrating) into the fixed lead frames which it should not be based on the reality. Is it possible to give some type of bonded contact between the metal lead frame and premold in certain regions where we think its mechanically locked? 

 

Thanks in advance for the reply.

 

Regards,

JK


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Message 1 of 5 ( Views: 101 )

Re: Core shift analysis_contact between Premold & metal lead frames

04/03/2018 7:07 AM

Hello @kulandaivel.palanisamy,

 

The contact/constrain between cores and inserts is not supported in Moldflow.

You can create each bonded part as one piece and assign different material properties to each element in this part.

 

For future function, we already have a request regarding the contact between cores in Idea Station(It's a good idea, I voted it!).

 

 

I hope this helps.

 

Best regards,

Tetsuya

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Tetsuya
Support Specialist
Product Support
Autodesk, Inc.



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Message 2 of 5 ( Views: 87 )

Re: Core shift analysis_contact between Premold & metal lead frames

04/03/2018 12:29 PM

Hello Tetsuya,

 

Thanks for your reply.

 

I understand this option is not available in current version of moldflow. I have also voted in idea station for having this option in future version. 

 

As you suggested, creating metal insert & plastic premold as one piece & assign different material properties to their respective elements.  I think it may be easy for Dual domain mesh to create as one piece (by removing the common surface between the metal & plastic insert) and assign different properties.

 

Is it o.k, if I convert the individual inserts into Tetra and assign its properties and give global merge to combine as single piece. Will it work? what is your suggestion?

 

Thanks in advance for the reply.

 

Regards,

JK


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Message 3 of 5 ( Views: 81 )

Re: Core shift analysis_contact between Premold & metal lead frames

04/04/2018 7:42 AM

Hello @kulandaivel.palanisamy,

 

Thank you for your reply.

 

>Is it o.k, if I convert the individual inserts into Tetra and assign its properties and

>give global merge to combine as single piece. Will it work? what is your suggestion?

 

It should work. I tried it with my test assembly model.

 

inserts1.jpg

 

I hope this helps.

Please let me know if you have any questions.

 

Best regards,

Tetsuya

-----------------

If my post answers your question, please click the "Accept as Solution" button. This helps everyone find answers more quickly!



Tetsuya
Support Specialist
Product Support
Autodesk, Inc.



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Message 4 of 5 ( Views: 65 )

Re: Core shift analysis_contact between Premold & metal lead frames

04/04/2018 2:36 PM

Hello Tetsuya,

 

Thanks for your reply.

Yes, it is also working for me but I observe the core displacement is very less comparatively to the previous option.

So, not sure which one is correct for which I need to validate with test results.

Any how..thanks again for your support and I accept as of now this as solution though I feel...there are lot of development needed on the Moldflow core shift simulation which I hope Moldflow will take care in future version.

 

Regards,

JK


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