apply 3d model pickup for plastics

[Sebastianora]

Hello, everyone.
I'm looking for information about thermoplastic retreats and how to apply them to 3d models that you draw.
looking on the net I came across in terms of linear withdrawal - parallel withdrawal to the injection flow, orthogonal withdrawal to the injection flow etc.etc.
I wanted to know if there are volumetric withdrawal values for material type, so that I can scale my 3d model once I have finished drawing it.

Thank you.
infinite

Sebastiano

 

[SHIREN]

Hello, everyone.
I'm looking for information about thermoplastic retreats and how to apply them to 3d models that you draw.
looking on the net I came across in terms of linear withdrawal - parallel withdrawal to the injection flow, orthogonal withdrawal to the injection flow etc.etc.
Hi.

Sebastiano

I think you went further
you just have to apply to your 3d a withdrawal value that depends on the material you need to use
1% to 3%

I wanted to know if there are volumetric withdrawal values for material type, so that I can scale my 3d model once I have finished drawing it.

There are tables on the net
but they are always very generic
you are prog an injection mold
and better than asking the raw material supplier
Thank you very much

 

[Sebastianora]

I think you went further
you just have to apply to your 3d a withdrawal value that depends on the material you need to use
1% to 3%


There are tables on the net
but they are always very generic
you are prog an injection mold
and better than asking the raw material supplier
Thank you very much

thank you very much for the info, I will see to look for these tables.

 

[Simold]

Hello sebastianora.
Try to take a look here
xoomer.virgilio.it/sirplaster/tabella.html
As withdrawal,in most cases,Iapply the average percentage between the two values.

 

[Sebastianora]

Hello sebastianora.
Try to take a look here
xoomer.virgilio.it/sirplaster/tabella.html
As withdrawal,in most cases,Iapply the average percentage between the two values.

Thank you simold!! ! !

 

[ciciu]

the collection values are good that they come from the experience and study of the circumstance; however, there are many materials with the online datasheets, directly from the manufacturer or indirectly in information portals for plastics (e.g. ides)
in many years I do not remember having seen use different retreat; In ignorance, the average value has always been used, and when it is not clear, it compensates for the moulding.
When you write that once you complete the model, do you want to apply the withdrawal? Is it because you have to make the mold?

 

[Simold]

Good morning
to me only in one case happened to have to apply two different values of withdrawal...........or better, I should have
apply two different withdrawal values.
I realized only after the first mold test.
think I also interfaced with the raw material supplier.
Unfortunately for what concerns the withdrawal you must always come down to compromises and, as you say,
compensate for the molding.
by now between tolerances of the model, areas subject to possible successive changes, extractors to be expected,
And what else, designing a mold has become a whole way.
It's not bad that there's always healthy welder.

hi and good work