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Mechanics of Winding Laminate Webs and the Prediction of Machine Direction Curl
(2019-05-01)
Winding models that describe the residual stresses due to winding single layer webs at the end of roll-to-roll manufacturing machines began development over 50 years ago. These models have been used to reduce or avoid ...
Modeling web handling systems and a method for determining feedback controller gains
(2020-07)
Modeling the longitudinal dynamics and control of web handling systems requires accurate models of the primitive elements involved, and an understanding of the processes used for speed and tension control. Primitive elements ...
Cambered and Non-flat Polyethylene Webs Induced by Thickness Variation
(Oklahoma State University, 2007-05-01)
One of the most common web defects is web bagginess. Although it appears in most web materials, it is very difficult to categorize since its appearance changes from one case to the other; hence it has been given different ...
Determination of the Temperature Rise and Wrinkling Behavior of Webs Transiting Heated Rollers
(Oklahoma State University, 2014-05-01)
Many materials are manufactured and processed as webs. Examples of webs include: paper, plastic films, textiles, and metal foils. Due to the thin nature of webs, geometric instabilities can arise during web handling ...
Development of wound-on-tension in webs wound into rolls
(2006-12)
Scope and Method of Study: The Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll. The WOT controls the stresses in the wound roll and hence, the defects that can arise due to these stresses. ...
Model Reference Adaptive Control of Web Guides
(Oklahoma State University, 2007-05-01)
The term web is used to describe materials which are typically manufactured in a roll-to-roll manner. A wide variety of materials such as textile, paper, plastics, composites and metals are manufactured in rolled form ...
Analysis of Moment Transfer in Multi-Span Web Systems
(Oklahoma State University, 2010-05-01)
Webs pass over numerous rollers in web processing machinery. A common problem is the formation of troughs and wrinkles in webs. Any out-of-plane web deformation in a span is called a trough and if this trough passes over ...
Analysis of the Unwind Section of an Industrial Web Processing Line
(Oklahoma State University, 2011-07-01)
The purpose of this thesis is to analyze the control strategies and tension performance of the unwind section of an industrial web processing line that manufactures composite flooring materials. The main elements of the ...
Comparison of Active and Passive Dancers for Periodic Tension Disturbance Attenuation in Web Processing Lines
(Oklahoma State University, 2004-12-01)
This thesis compares the performance of passive and active dancers in a web process line in the presence of periodic tension disturbances. A sinusoidal disturbance, injected into the web line using an eccentric roller, is ...
Development of Non-interfering Wound-on-tension Measurement Method
(Oklahoma State University, 2014-05-01)
The key element to understand the structure of a wound roll is the pressure inside it. This pressure cannot be too small or too large. If it is too small it may not withhold its structure. If it is too large it may damage ...