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Now showing items 71-80 of 429
Optimization of wind-up tension of webs preventing wrinkles and slippage with experimental verification
(Oklahoma State University, 2009-06)
This paper describes the optimization method of wind-up tension to prevent wound roll defects, mainly star defect (wrinkling) and telescope (slippage), based on the optimum design technique. Hakiel's nonlinear model with ...
Modeling rubber covered nip rollers in web lines
(Oklahoma State University, 2001-06)
Rubber covered nip rollers have a number of applications within web lines. Rubber covered rollers are often used to nip the web against a metal surfaced roller that is driven to achieve a certain web velocity or web tension. ...
Modeling and computer simulation of zero speed splice unwinds
(Oklahoma State University, 2017-06)
A computer program for conducting model simulations for zero speed splice unwinds is described in this paper. A typical unwind system consisting of the unwinding material roll, festoon, dancer, and pull rolls is considered. ...
Pseudo 3D viscoelastic winding model
(Oklahoma State University, 2007-06)
A pseudo 3D winding model that has considered orthotropic viscoelastic effects during winding and storage has been developed and implemented in a code revised from the 2D viscoelastic winding code developed by Qualls and ...
Fast winder change with reduced influence on film tension
(Oklahoma State University, 2015-06)
For a 2 station turret winder it is shown that the film length increases at winder change (turret rotation, cutting arm movement und contact roller movement). It is shown how this change in length must create a change of ...
Measurement and modeling of bearing drag in idler rollers
(Oklahoma State University, 1997-06)
Idler roller bearing drag plays a critical role when modeling web tension in a web line system. Lubrication, line speed, radial and axial loads on bearings can influence drag, which is directly reflected as a tension load ...
Mechanics of cambered web belts on aligned rollers
(Oklahoma State University, 2019-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. Webs can enter a cylindrical roller normally if the forces required to sustain normal entry and ...
Web longitudinal dynamics
(Oklahoma State University, 1997-06)
Tension transients in a moving web can be described and predicted adequately from first principles. The resulting mathematical models are very useful for designing and debugging web conveyance machines and their controls. ...
On the dynamics of web transfer in an open draw
(Oklahoma State University, 1993-06)
A paper web running in an open draw of a high speed paper machine is subjected to various internal and external forces which stretch it and which can ultimately rupture it. The forces arise from speed differences between ...
New model for the steady state deformation and friction of webs on rollers
(Oklahoma State University, 2017-06)
A web moving through process machinery interacts with rollers through frictional forces, which may change its direction of motion and tension. By modelling the web as a beam, these forces can be calculated from its tension, ...