If the material mix is quite broad, consider having more than one slitting type. Score/Crush: A rotary blade pressed into a hardened anvil rollerĮach has their benefits, and its important to understand which type works best for the materials.Razor: A razor blade that cuts “in-air” or “in-groove”.#3) What type of slitting is best for the material? This is due to a combination of tension control, weight of the finished rolls on the shafts and the overall ergonomics. Most manufacturers have a maximum rewind diameter of either 32” (800mm) or 40” (1000mm) for their duplex center-wind slitters. Above 40” maximum rewind diameter, a center-surface slitter would be the better choice. At 40” (1000mm) diameter, some machine manufacturers may offer both, depending on the application. The maximum roll diameter and weight will, again, help determine if the slitter should be center-wind or center-surface wind.įor roll diameters under 32” (800mm) a center-winder is generally an excellent choice.
#2) What is the maximum finished roll diameter and weight? The center-surface machine provides the most support from the slitting section to the rewind, minimizing these negative effects and ensuring good quality results. With wider slit widths, the materials are more stable, making the center-winder a great choice with its simple design, good ergonomics and cost effectiveness.Īt narrower slit widths, the slit material is more vulnerable to effects such as flutter and caliper variation which impact finished roll quality, especially at larger rewind diameters. If the slit widths are less than 1”, a center-surface slitter rewinder is a better fit for the application. The general rule is that if the slit widths are greater than 1” (25mm), a center-wind slitter rewinder is recommended. To help provide clarity, use these three basic questions to help define the right machine for the application. Knowing which machine is right for the application may not be clear. However, selecting the right machine specification can become convoluted and difficult with all of the various manufacturers, machines styles and features. When making the decision to purchase a new slitter rewinder, it can be an exciting process for companies both large and small.
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