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There are many factors to scrutinize when considering adding slitting to an existing converting process where there is no slitting. As with many things in life, it's just not as simple as it appears. Simply adding some framework and slitting knives should be all it takes, right? Nope, it's just not that cut and dry. Here are some things to think about before making the plunge into adding slitting capability to your already existing process:
Bottom line, it's important that you realize that adding slitting to existing machine incorporates many factors to properly slit and rewind rolls without defect. It's a far jump from just cutting your single web into multiple webs. When any web is slit, each slit width then becomes "its' own web". In other words, each slit width must be handled, individually, in your machine with the same care as the parent (prior to slit) web. Web thickness variations, web length variations (yes that is very common in almost any converting operation) and non-uniform tension across the width of the pre-slit web can cause havoc when handling each, post-slit, slit width. Skewed rollers, improper tension control, incorrect web geometry, drive synchronization issues and improper or non-existent web guiding are just some of the potential machine oriented issues, which must be considered.
Jeffrey Damour, Converter Accessory Corporation, 800-433-2413
**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.
201 Alpha Road
PO Box 188
Wind Gap PA 18091-0188
Phone (800) 433-2413 -(610) 863-6008
Fax (800) 709-1007 - 610) 863-7818
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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