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Now showing items 11-19 of 19
Winding mechanics of laminate webs
(Oklahoma State University, 2017-06)
Models that describe the residual stresses due to winding single layer webs at the end of roll-to-roll manufacturing machines are mature. These models have been used to reduce or avoid defects that are due to winding. Many ...
Axisymmetric nonlinear transient thermo-elastic winding model
(Oklahoma State University, 2015-06)
Temperature is among the most important environmental factors which play a crucial role on the mechanical state of wound rolls of web material. Existing literature include studies concerning the thermal characterization ...
Predicting the web length and layers in a wound roll
(Oklahoma State University, 2019-06)
The length of web in a wound roll is one mark of roll quality. The available web length in a roll is a concern for many who process webs and those who convert webs. There are algorithms that estimate the length of web and ...
Boundary conditions for lateral deformation of webs transiting rollers in roll-to-roll process machines
(Oklahoma State University, 2017-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. The lateral registration of the web in successive R2R processes can determine whether a product ...
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 ...
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 ...
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 ...
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 ...
Coupling of winding models and roll quality instruments
(Oklahoma State University, 2015-06)
Winding models have been under development for roughly 50 years. These models have become mature in their ability to predict the internal residual stresses within a wound roll as a function of winder type, winder operating ...