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June 09, 2006
Can Roll Diameter Be Predicted?
Question:
How good are winding models at predicting the diameter of wound rolls, for a given length, tension profile and lay-on force (The small variations from compression and air entrainment, of course!)?
Dilwyn Jones, Emral Ltd.
Dilwyn.Jones@physics.org
Reply (not exactly an answer):
I haven't seen this done.
Start with the easy case of a narrow, uniform thickness roll - I imagine that if you had the stack modulus data and modeled the roll pressure, you could map the web thickness on to the pressure model to get a thickness of each layer, total stack height, hence diameter.
The difficult case, as you've alluded to, is to incorporate thickness variations and entrained air. Some work along this line was presented at the last IWEB, Dr. Keith Good and xxx, but they were looking more at stresses, not stains and diameters.
What would you do with this info?
And what are your thought on this topic? Do tell.
tjw
Posted by Tim Walker at June 9, 2006 09:21 AM
