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Now showing items 111-120 of 126
Moving web instability caused by the bending deflection of the support idle roller
(Oklahoma State University, 2015-06)
The moving web is transported through a lot of rollers in the roll to roll process machines. These rollers are usually driven rollers, dancer rollers and idle rollers. The number of the idle roller is the largest in the ...
Winder vibration: Causes, defects, and remedies
(Oklahoma State University, 2011-06)
Web process machines employ various winder types depending on the web being wound. These winders have various rolling contacts between machine elements and the winding roll which give rise to complex vibration phenomena. ...
Two-dimensional behavior of a thin web on a roller
(Oklahoma State University, 2011-06)
This paper presents a continuation of work described at the 2009 IWEB conference in a paper titled, "Two-dimensional Behavior of a Thin Web on a Roller" [1]. In that paper (which will be referred to as Part I), linear ...
Effect of mass transfer on multi-span lateral dynamics of a uniform web
(Oklahoma State University, 2017-06)
This paper will show that the acceleration equation used in multi-span lateral dynamic models is a consequence of mass transfer between spans1. Mass transfer effects fully account for the equation currently used in ...
Modeling of the transport behavior of low modulus webs
(Oklahoma State University, 2013-06)
We consider three key issues in this study for low modulus webs. First, transport in the high strain region is considered when the materials exhibit nonlinear and viscoelastic behavior. Second, in-plane biaxial strain is ...
Calculation of film tension from film position and roller position
(Oklahoma State University, 2017-06)
The web tension as a crucial parameter for a web line is normally manually influenced by the speed of the motors driving the rollers. This paper shows that is better and easier to use the roller position derived from the ...
Controlling static on an unwinding roll
(Oklahoma State University, 2011-06)
Excessive static charges on insulating webs are the root cause for a number of problems in roll-to-roll manufacturing operations. Static charges attract contaminants and cause discharges that can ignite flammable vapors, ...
Surface compression of wound rolls
(Oklahoma State University, 2013-06)
Stress levels and profiles in the vicinity of contact between a wound roll and a nip or a rigid surface are important for the quality of the product during manufacturing or storage stages. Excessive or insufficient pressure ...
Unified model for longitudinal and lateral web dynamics
(Oklahoma State University, 2019-06)
In "The Effect of Mass Transfer on Multi-Span Lateral Dynamics of Uniform Webs" [1], it is shown that behavior of Shelton's lateral dynamic beam model [2] can be explained as the interaction of the normal entry equation ...
Nip impinged center-winding including a nonlinear beam model
(Oklahoma State University, 2017-06)
Nip pressure is commonly applied in winding processes in order to maintain structural stability and prevent air entrainment at high speeds. In nip induced winding modeling nip and roll are assumed to be beams with ...