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Now showing items 51-60 of 126
Optimization of winding conditions for preventing roll defects caused by thermal-viscoelastic property and experimental verification
(Oklahoma State University, 2015-06)
Plastic films are used in many high functional products. They are produced on roll to roll system. The films are continuously wound in the shape of roll using this system. The wound roll is shipped to the store and ...
Movement of layers and induced tension in the nip area between drum and paper layers
(Oklahoma State University, 2011-06)
During paper manufacture and processing production losses occur during winding of machine-wide paper rolls and finished rolls due to winding faults. During the winding process at least one drum (steel or rubber-covered) ...
Comparison of control strategies for roll-to-roll printing presses
(Oklahoma State University, 2013-06)
Flexible printed electronics is touted to be a significant part of the future of the roll-to-roll (R2R) printing industry. Electronic devices, such as RFID tags, low-cost displays and lighting devices, polymer solar cells, ...
Analysis of web wrinkling in accumulators
(Oklahoma State University, 2011-06)
Accumulators provide a large amount of web storage in a small space. They are used to allow start/stop events like an unwind splice or a transfer to a new roll on a winder. It is common to see a loss of productivity due ...
Impact of thickness measurement on predicting residual stresses due to winding
(Oklahoma State University, 2015-06)
Axisymmetric winding models were initially developed to deal with web thickness variations that were manifested in the machine and cross machine direction. The web thickness variation is a prime input to these models. Small ...
Web tension variations caused by temperature changes and slip on rollers
(Oklahoma State University, 2011-06)
Webs are frequently heated or cooled on rollers, where thermal expansion or contraction attempts to reduce or increase tension respectively. In the case of vacuum coating, the web first cools on the chilled drum, then is ...
Web wrinkling resulting from moment transfer
(Oklahoma State University, 2013-06)
Considerable research has been focused on the impact of roller misalignment on web instability. Early work focused on the prediction of trough instabilities in the entering span, just upstream of the misaligned roller [1]. ...
New governing equation for web tension by employing a Neo-Hookean material model
(Oklahoma State University, 2019-06)
In this work, we derive a governing equation for web tension in a span by employing a Neo-Hookean material model that is applicable for transport of web materials under both small and large strains. This governing equation ...
Impact of large deformations of webs transiting rollers
(Oklahoma State University, 2017-06)
Webs are subjected to large out-of-plane deformations when transiting rollers in process machinery. Webs are often treated as membranes in analysis but become subject to significant bending strains when transiting rollers. ...
Behavior of webs transiting crowned rollers
(Oklahoma State University, 2013-06)
Crowned rollers are known to center running belts by observation. Crown can be an unintentional artifact of rollers whose surfaces are machined on lathes while supported at their ends. The bending stiffness of the rotating ...