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Now showing items 91-100 of 126
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, ...
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 ...
Pull rollers: Plain, vacuum and unported
(Oklahoma State University, 2015-06)
The role of a pull roller in a web machine is identified. The ability of pull rollers, plain or vacuum type, to permit tension differences is explained. Three types of pull rollers are described. Among them is the un-ported ...
Control design for longitudinal web dynamics: Benefits and drawbacks of robust control approaches
(Oklahoma State University, 2013-06)
Web tension and speed are two key variables to be monitored and controlled in order to achieve the expected final product quality. One of the main objectives in web handling plants is to reach an expected web speed while ...
Assessing wound roll quality using a measured stiffness/model method
(Oklahoma State University, 2019-06)
For those concerned with roll quality it is difficult to suppress the urge to compress the outer surface of a wound roll with your thumb to sense how tightly the roll was wound and how large the internal pressures might ...
Connection between longitudinal and lateral web dynamics
(Oklahoma State University, 2019-06)
Where does the entry angle come from? This paper will show that the answer to this question reveals a connection between longitudinal and lateral behavior that has gone largely unnoticed.
Effect of winder type and web material properties on wound-on-tension
(Oklahoma State University, 2013-06)
The choice of winder type for various web materials has long been a qualitative discussion. Web materials are vast and hence the range of web material properties is also vast. Valid but conflicting opinions for an optimal ...
Explicit simulations of wrinkle formation due to web non-uniformity
(Oklahoma State University, 2017-06)
It is very common to laminate different materials together and then form, transport and process a web with non-uniform structure in the product manufacturing industry. The periodic media analysis (PMA) method in Abaqus/Explicit ...
Optimizing nipped roller systems
(Oklahoma State University, 2017-06)
Nipped rollers are central to many web converting processes - printing, coating, embossing, calendaring, and winding. Uniform products require uniform load and pressure from the nipping process. Uneven nipping not only ...