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Web wrinkles are one of the most pressing issues for converters. They can be a huge profit eater because web wrinkles can make your product unacceptable (waste). Web wrinkles can force you to run your converting process at lower than desired output (running speed) and can frustrate your customers.
There are many steps you can take to reduce web wrinkles like laser aligning rollers, improving tension control and taking steps to ensure your rollers turn properly. Along with receiving the highest quality materials from your supplier. Often times, even though you have taken these and many more steps, wrinkles still occur. Anti- wrinkle rollers may be necessary at one or many locations throughout your converting process to further reduce or completely eliminate web wrinkles.
There are many types of anti-wrinkle rollers from which to choose. Grooved (rigid and flexible) rollers, adjustable and fixed curved axis (bowed) rollers, crowned and concave rollers, nip type (edge pullers) and expanding surface rollers. In this article, we will discuss the expanding surface type anti-wrinkle roller. There are several different types of expanding surface rollers like slat expanders, rubber band type and continuous rubber sleeve type. We will discuss the premier type of anti-wrinkle device; the continuous sleeve expanding surface roller, how it works and why it may be the best option for your process.
Continuous sleeve, expanding surface anti-wrinkle rollers utilize a rubber sleeve which grows in face width for 180 degrees of rotation. Then, for the next 180 degrees of rotation the sleeve shrinks in face width. So if you take a tape measure to one of these rollers, in the field, you will see that the face width is actually shorter on one side of the roller face than it is on the other. Your web enters the contracted side of the rubber sleeve and exits on the expanded side. As the roller rotates the rubber sleeve stretches from the short side to the long side, under your web. This stretching action of the rubber sleeve is what removes wrinkles from your web.
This type of anti-wrinkle roller features:
This expanding surface roller incorporates a smooth, linear surface. Perhaps its' best feature is that it will not adversely affect your web or process. All while providing very aggressive anti-wrinkle properties.
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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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