SLITTERS AND REWINDERS | MACHINERY
Roll play: slitters and rewinders
Recent advances in slitting and rewinding include shafts that cut the cost of cardboard cores, a winder allowing faster reel change and increased use of cloud-based platforms
Slitting and rewinding is critical when converting finished rolls of film into saleable – and valuable – end products. Doing these jobs effectively helps to raise overall production efficiency. Hosokawa Alpine has developed the AW
winder, which it says offers high performance in demanding applications. The model combines and expands the advan-
tages of two existing models: the 700 winder and the AWD winder. The AW winder allows working widths of 1,000 to 3,000mm and a roll diameter of up to 1,500mm. The winding speed is up to 300 m/min with a maximum tensile force of 250N. Winding shaft diameter is detected automatically. Winding shafts are available in 3, 6 and 8in versions. Existing shafts from the Kolb 700 series, which are widely used by Alpine customers, can also be used. The pre-nip can be integrated into the winding station or used separately, depending on customer needs. In addition – in case of a telescoped reel blocking the reel change – there is now an operat- ing function allowing its release and completion of the reel change. In this way, production can continue without interruption. “With the AW winder, customers benefit from maximum flexibility and high reel quality,” said
www.filmandsheet.com
Holger Niemeier, managing director and head of blown film extrusion at Hosokawa Alpine. “The effective reel change time is now less than 45 seconds, saves valuable time.” The new model also includes the interface to the company’s ExVis 5 process visualisation system, so that operating and process data can be visualised in a user-friendly way and optimally managed, he added. The AW winder can wind in both directions (right and left) thanks to its reverse function. “Clever software functions are also available,” said Niemeier. “An initiated reel change can be stopped again without disturbing the process – such as if a winding core was prepared incorrectly.” In addition, trends of tensile stresses can be displayed and monitored to boost the quality of the end product. Other options include: oscillating longitudinal slitting units; additional spreader rollers; winding shaft lifting devices; winding shaft magazines; and edge trim management.
Stretch winding Colines of Italy has made further improvements to its AllRollex cast lines for stretch film production, with a new winding system. With high speed and quality in production, the
April 2022 | FILM & SHEET EXTRUSION 35
Main image: LAEM IMS presented its Riboslit and TR4 machines at ICE recently
IMAGE: SHUTTERSTOCK
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