OSU - International Conference on Web Handling: Recent submissions

Now showing items 21-40 of 429

    • Calculation of film tension from film position and roller position 

      Oedl, Gunter (Oklahoma State University, 2017-06)
      The web tension as a crucial parameter for a web line is normally manually influenced by the speed of the motors driving the rollers. This paper shows that is better and easier to use the roller position derived from the ...

    • Nip impinged center-winding including a nonlinear beam model 

      Mollamahmutoglu, C.; Good, J. K.; Markum, R.; Gale, J. W. (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 ...

    • Optimization of winding conditions for preventing roll defects caused by thermal-viscoelastic property and experimental verification 

      Hashimoto, Hiromu (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 ...

    • Explicit simulations of web transport through process machines using periodic media analysis technique 

      Fu, Boshen; Michal, Neal (Oklahoma State University, 2015-06)
      In this paper, the periodic media analysis (PMA) technique in Abaqus/Explicit [1] has been applied to simulate multiple cases of web transport through process machines. The Abaqus models for web transport developed in the ...

    • Impact of thickness measurement on predicting residual stresses due to winding 

      Good, J. K.; Mollamahmutoglu, C.; Markum, R.; Gale, J. W. (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 ...

    • Explicit simulations of cambered web steering 

      Fu, Boshen; Good, James K. (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 ...

    • Impacts of a 90 degree twist on lateral web dynamics 

      Carrle, Jeremy; Lange, Steve; Ba, Shan (Oklahoma State University, 2015-06)
      Twists are sometimes used to turn or provide passive lateral control for narrow webs in those cases where space for a sufficient twist span length (to avoid a wrinkle) is achievable. This paper uses the finite element ...

    • Winding process calibration and comparison 

      Walker, Timothy J. (Oklahoma State University, 2015-06)

    • Comparison of multi-span lateral dynamics models 

      Brown, Jerry L. (Oklahoma State University, 2015-06)
      It's obvious that when a web changes its lateral position at a roller, subsequent spans will be affected. Less obvious, is the fact that transient stress variations will also affect downstream spans. Multi-span models are ...

    • Pull rollers: Plain, vacuum and unported 

      Cole, Kevin (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 ...

    • Fast winder change with reduced influence on film tension 

      Schuster, Stefan; Oedl, Gunter (Oklahoma State University, 2015-06)
      For a 2 station turret winder it is shown that the film length increases at winder change (turret rotation, cutting arm movement und contact roller movement). It is shown how this change in length must create a change of ...

    • Combined stresses for webs going over rollers 

      Roisum, David R. (Oklahoma State University, 2015-06)
      In research it is typical that only one source of stresses is studied at a time. In entry-level mechanics textbooks, you may see the occasional combined stresses taught where a couple of sources are superposed. Yet, seldom ...

    • Tin-canning defects in thin film winding 

      Walker, Timothy J.; Cole, Kevin (Oklahoma State University, 2015-06)

    • Roll speed and web tension regulation using two degree of freedom control systems 

      Raul, Pramod R.; Pagilla, Prabhakar R. (Oklahoma State University, 2015-06)
      In this paper, we first consider the problem of load speed regulation in a two inertia system consisting of a motor shaft connected to the load shaft via a mechanical transmission. The problem is reminiscent of a material ...

    • Design of tension control systems to minimize interaction and disturbance propagation in web process lines 

      Raul, Pramod R.; Pagilla, Prabhakar R. (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 ...

    • Model-based control of lateral web behavior - An interconnection of two web guiding systems within packaging machinery 

      Philipp, Andre; You, Chang (Oklahoma State University, 2015-06)
      Within packaging industry mostly web materials are used to form bags or similar shaped packages. In order to professionally convert these materials and achieving increasing quality requirements of bags, detailed knowledge ...

    • Belated appreciation of Lisa Sievers' thesis 

      Brown, Jerry L. (Oklahoma State University, 2015-06)
      In her 1987 thesis [1] and a follow-up paper in the IEEE Transactions of Automatic Control [2], Lisa Sievers described three dynamic multi-span models for lateral web behavior.

    • Axisymmetric nonlinear transient thermo-elastic winding model 

      Mollamahmutoglu, C.; Good, J. K. (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 ...

    • Web instability at open draw and its impact on paper machine efficiency 

      Parent, Frederic (Oklahoma State University, 2015-06)
      Paper machine efficiency is mostly affected by machine down time, resulting from maintenance work and web breaks. One of the main factors affecting breaks is the web instability at open draws on paper machines, especially ...

    • Coupling of winding models and roll quality instruments 

      Mollamahmutoglu, C.; Bulut, O.; Adari, S.; Good, J. K. (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 ...