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Consider that your rewind roll is basically similar to a very large clock spring. If you rewind your rolls with constant tension, in-wound pressure builds with every layer wrapped onto the rewind. This pressure may be so great in towards the core that the inner layers of the roll may buckle on themselves, causing lateral wrinkles and defects across the web. This pressure may be so great that you may even crush your cores.
If you don't see these defects in your rewound rolls, great! Don't change any system that works. However, if you do see defects in your rolls towards the core or crushed cores, taper tension may solve your problem.
Automatic tension controls with built in taper tension capability allow you to decrease tension at a controlled rate as the rewind roll builds. Decreasing tension as the roll is rewound will decrease the pressure in the "clock spring". Proper taper tension control will eliminate problems with the inner layers of your rewound rolls by decreasing the pressure build up.
**DISCLAIMER - A great deal of time has been invested in the development of our weekly tech tips. To the best of our knowledge, they are accurate. It is up to the user to verify all results.|
THE AUTHOR ASSUMES NO LIABILITY CONNECTED WITH THE USE OF THIS INFORMATION OR THE RESULTS OBTAINED FROM IT.
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What is Web Handling?
Web Handling is the science, engineering and equipment necessary to successfully transport a continuous flexible material through various processes without defect. Enhancing Web Handling with proper equipment will ensure materials are processed at their maximum efficiency, allowing the process to generate maximum profits.
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