Forward roll coating with deformable rolls: A simple one-dimensional elastohydrodynamic model
✍ Scribed by D.J. Coyle
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 991 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
✦ Synopsis
simple one-dimensional elastohydrodynamic model of forward roll coating with deformable rolls is formulated and solved. It predicts the flow rate, pressures, and roll surface deflections in the nip between rollers, all as functions of one parameter, which can be conveniently chosen as either a dimensionless roll gap setting or load between rolls. The model predicts that for the small-deflection limit the coated-film thickness varies as R(p V)Wm ', while for the large-deflection limit the coated-film thickness varies as R*'5(pV)"ZE-'li3 W-1'6 (p = viscosity, V= roll speed, E = Young's modulus, W= load, R = roll radius). The range of applicability of these limits is defined, as are the operating characteristics in the intermediate region. Predictions of minimum roll surface separation compare well with published data.