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Now showing items 341-350 of 429
Gentle wavy defects in knurled wound rolls
(Oklahoma State University, 2009-06)
The manufacture of many products involves the winding of continuous thin, flexible webs into wound rolls. In many applications involving the use of plastic webs, it is beneficial to mechanically emboss the edges of the web ...
Tin-canning defects in thin film winding
(Oklahoma State University, 2015-06)
Wrinkling of foils
(Oklahoma State University, 2011-06)
Aluminum and copper metal webs less than 150 microns (6-mils) are considered foils. Demand for aluminum and copper foils are growing, driven by growing markets for flexible electronics, flat panel displays, lithium batteries, ...
Static and dynamic properties of CFRP rollers
(Oklahoma State University, 2009-06)
Carbon fiber rollers combine high axial stiffness with low weight. This leads to higher bending frequencies and increased critical speed and makes them suitable for high speed machines as web guide rollers or as other ...
Abilities and inabilities of wound roll models to predict winding defects
(Oklahoma State University, 2005-06)
Wound roll models began appearing in the literature 40 years ago. These models predict internal stresses within wound rolls due to winder operating conditions and web material properties. The models have progressed much ...
Strategies for competitiveness
(Oklahoma State University, 2003-06)
Web tension regulators - control heuristics
(Oklahoma State University, 2013-06)
Classical Control Theory using closed-loop controllers has been applied to drives for web handling beginning in the 1940's. Back then the mathematics was ahead of the tools for analysis as well as the modeling and the drive ...
Study of oscillation
(Oklahoma State University, 2017-06)
There are many reasons to consider oscillation. Most fall under the overall desire to smear out streakiness in web caliper (basis weight, gage, thickness etc) so that it doesn't build up on some downstream process; most ...
New method for measurement of wound-in-tension in webs wound into rolls
(Oklahoma State University, 2007-06)
The Wound-In-Tension (WIT) is the tension in the outermost layer of a winding roll. The Wound-In-Tension is an important parameter that controls the stresses inside the wound roll which in turn determines the quality of ...
Improvement of control of a web accumulator
(Oklahoma State University, 2009-06)
Previous analysis of the dynamics of a conventional accumulator (no driven rollers within the accumulator, with all rollers identical) was published by Shelton [1]. This 1999 analysis showed that such accumulators commonly ...