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Now showing items 81-90 of 153
Regulation concept for web spreading equipment in web processing machines on the basis of neural networks
(Oklahoma State University, 2001-06)
Web spreading systems are used in converting machines in order to guarantee a folding free web transport and a sufficient slit gap or slit separation. The adjustments, dependent on the respective application, are carried ...
Two-dimensional behavior of a thin web on a roller
(Oklahoma State University, 2009-06)
A web on a roller is usually modeled as a one-dimensional belt in a state of pure circumferential stress. However, most of the important problems in lateral web behavior involve shear stress and cross web stress. Furthermore, ...
Adaptive, self-underpressurizing suction roll for fast web handling concepts
(Oklahoma State University, 2005-06)
In web handling one of the most demanding area is nip or pocket area for incoming or outgoing web. Depending on speed of web and rotating roll surfaces, boundary layers transport air causing negative or positive relative ...
Widthwise variations in web properties and wound roll structure
(Oklahoma State University, 2005-06)
Widthwise variations in web properties affect wound roll structure. Cole & Hakiel published a two-dimensional model in 1992 which took widthwise variations in web thickness into account. Based on this publication a model ...
Out-of-round paper rolls
(Oklahoma State University, 2003-06)
Paper is usually shipped in rolls covered by a thin wrapper to protect it from moisture and dirt. In effect, the roll becomes the shipping container for the paper. A single sheet of paper is weak and fragile, but in roll ...
Web lateral dynamics with buckling in sheet metal rolling
(Oklahoma State University, 2005-06)
The stability of web lateral motion is of importance in many engineering applications where the deviation of the web from the processing direction is highly undesirable and can cause various defects. This is especially ...
Finite element simulation of shear slitting of aluminum webs
(Oklahoma State University, 2003-06)
A three-dimensional finite element (FE) procedure has been developed to simulate shear slitting using ABAQUS/Explicit, and the process of shear slitting has been investigated for aluminum webs obeying elastic-plastic ...
Macroscopic effects of surface roughness in confined air-flow
(Oklahoma State University, 2003-06)
One challenge when processing flexible media such as plastic films is to obtain rolls without any aspect defect : if one considers that a "defect" (i.e. wrinkling or buckling) is due to the fact that the stress generated ...
Axisymmetric wound roll models
(Oklahoma State University, 2009-06)
Axisymmetric wound roll models provide the greatest definition of wound roll internal stresses to date. Simple one dimensional models can provide the user with radial profiles of pressure and circumferential stress as a ...
Challenges and opportunities in flat panel industry
(Oklahoma State University, 2005-06)
The Flexible Panel Display (FPD) business is rapidly growing in Asia. Many industrial companies not only from traditional coating industries but from others such as electronics, printing, and film manufacturing industries, ...