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Now showing items 71-80 of 126
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 ...
Design of tension control systems to minimize interaction and disturbance propagation in web process lines
(Oklahoma State University, 2015-06)
In roll-to-roll systems (R2R), a local controller is designed for each section or tension zone based on measurement of web tension and speed from that section; this is typically referred to as decentralized control. This ...
Explicit simulations of cambered web steering
(Oklahoma State University, 2015-06)
Cambered webs are common in the web handling industry. The mechanics analyses of stressed cambered webs have been reported by several publications [1]-[3]. The majority of the test data that exist demonstrate that cambered ...
Lateral dynamics simulation of webs having cross-machine direction variation
(Oklahoma State University, 2013-06)
Webs often include sectional variation in caliper or modulus of elasticity as a result of undesirable manufacturing variation or by intentional design. These variations influence wrinkle formation and tracking control in ...
Winding process calibration and comparison
(Oklahoma State University, 2015-06)
Influence of heating on tensile and relaxation behavior of wet paper
(Oklahoma State University, 2013-06)
The influence of increasing temperature on the strength and relaxation of wet never-dried paper was studied using C-IMPACT, a tensile tester equipped with a special heating chamber. The heating device formed a small climate ...
Parametric study of nip load control on a pope reel
(Oklahoma State University, 2019-06)
The secondary arms on a conventional pope reel control the nip load between the winding parent roll and the reel drum. As the parent roll grows, the secondary arms pivot away from the reel drum changing the angle of contact ...
Application of dimensional analysis to roll-to-roll manufacturing systems
(Oklahoma State University, 2013-06)
In this paper, we investigate the application of dimensional analysis for R2R systems. First, dimensional form of governing equations for web tension and speed are transformed to non-dimensional form using dimensional ...
Measurement and quantification of baggy webs
(Oklahoma State University, 2017-06)
Webs that have crossweb variation in machine direction length are commonly called "Baggy Webs". All real webs have some degree of bagginess. When the bagginess exceeds some quantity, web handling problems such as wrinkling ...
Advanced process models and control strategies for rotary printing presses
(Oklahoma State University, 2011-06)
Digitally position controlled and synchronized AC motors which have replaced the former mechanical line shaft allow for advanced control strategies of rotary printing presses. New controls require new process models. The ...