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Precisely measuring and keeping constant the tension of a moving web is essential to obtain an high quality product and to maximise productivity. |
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On the machine unwinders and rewinders and in any application where it is necessary to perform an unwind or rewind of the reel. |
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A“Real Time”check of the print quality when the machine is moving,is the main aim to reduce wastes,max. productivity and improve quality. |
Re friction shafts are the ideal solution for multiple and independent rolls rewinding on the same shaft, as each one have different web tension needs. They are equipped with expanding rolls which, compared to the balls, guarantee a wider gripping area ensuring no slipping of the cores. Also they can be used both with carton and plastic core reels without any loss of performance.
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The expanding rolls guarantees a wide supporting surface, ensuring a greater stability of the reel core that remains perfectly perpendicular to the central shaft |
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With the expanding balls often happens that they create a groove in the cores during the reel unloading; the expanding rolls guarantee a safe and easy reel unloading allowing the reuse of the cores. |
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Usage both with carton and plastic cores: thanks to the wider supporting surface, the friction rings with expanding rolls ensure a perfect grip both with carton and plastic cores avoiding any kind of core slipping. |
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Smallest dimension: thanks to the wide supporting surface of expanding rolls, it's possible to realize them with a minimum width of 7,5 mm without any loss of performance. It means that they can be used with very narrow web like no any other friction shaft. |
