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Transient 2D paper web drying model based on CFD
(Oklahoma State University, 2009-06)
In the present article, a model combining the benefits of the small scale and large scale approaches towards modeling paper drying in a paper machine dryer section environment is described. The model is transient and ...
Roll speed and web tension regulation using two degree of freedom control systems
(Oklahoma State University, 2015-06)
In this paper, we first consider the problem of load speed regulation in a two inertia system consisting of a motor shaft connected to the load shaft via a mechanical transmission. The problem is reminiscent of a material ...
Experimental study of winding zone dynamics
(Oklahoma State University, 1997-06)
The elastic nature of plastic films and the rotational inertia of rolls, spindles and drives cause a film handling line to exhibit the characteristics of a dynamic system. This dynamic response can be observed by measuring ...
Evaluation of physical properties of thin film and measurement of unsteady thermal stress
(Oklahoma State University, 2019-06)
Winding defect such as the roll wrinkles or slips to lose the value of the product. Winding defect is caused by the internal stress condition in the roll and the temperature change of the roll after winding. Therefore, it ...
Containerboard and printing paper wound-on-strain measurements on a pilot winder
(Oklahoma State University, 2015-06)
Wound-On-Strain (WOS) measurement arrangement was set up on a single drum pilot-winder in the Winding Research Center of Valmet Technologies Inc. in Finland. The measurement was implemented with two Laser Doppler Velocimeters ...
Prevention of web floating at wrapped transport and guide rollers
(Oklahoma State University, 2003-06)
Increasing productivity of web converting machines requires constructive improvements for the prevention of web floating at transport and guide rollers. Existing solutions which carry off the air like vacuum or grooved ...
Inexpensive multipoint roller speed measurement system
(Oklahoma State University, 1997-06)
Machines that manufacture photographic web products use rollers to convey the web. Product imperfections, like scratches and scuff marks, are caused by loss of traction between these rollers and the web. Loss of traction ...
Computations of air films and pressures between webs and rollers for steady and unsteady operating conditions
(Oklahoma State University, 1997-06)
Numerical computations have been performed to predict the lubricating air film thickness and pressure for the entire region of smooth rotating support rollers wrapped by moving impermeable and permeable webs. Results have ...
Irreversible reduction of foil tension due to aerodynamical effects
(Oklahoma State University, 1993-06)
Computation of the residual stress generated during the winding of a plastic film has been coped with by many authors. These studies are based on the assumption that the residual stresses mainly depend on two winding ...
Web tension in an accumulator and industry needs for the future
(Oklahoma State University, 2009-06)
A web is defined as a continuous strip of flexible material. Continuous web processes provide cost savings to manufacturers and converters. Converting processes use unwinds to provide a continuous supply of web material. ...