WINDERS | MACHINERY
Recent developments in slitters and
rewinders include supply contracts for bioriented film in China, boosting
label production in the Czech Republic and a faster, more compact model
Rolling up: advances in slitters and rewinders
Slitting and rewinding is critical in a host of end-use converter industries, from tape production to coated film. As with many types of machine, speed and accuracy are in constant need of improvement. Bimec of Italy recently developed a new dual-spindle slitter rewinder – called the STB 550 – which is a redesign of its existing STM 50 model. The STB series already includes the STB 560 dual spindle slitter rewinder. The two models have different configurations:
STB 550 has a single-face structure and unwinds mother rolls with diameters up to 1000mm and rewinds finished rolls up to 500mm while the STB 560 has mother rolls on a shaftless unwind stand placed on the rear of the machine. It also unwinds mother rolls up to 1000mm and rewinds finished rolls up to 610mm diameter. Both slitters boast ease of use, compactness and
flexibility – giving them a competitive price, says Bimec.
Another benefit is that the electrical panel has also been positioned on the side – opposite the motors – allowing it to be completely isolated and give greater ease to reach the electrical compo- nents to carry out maintenance. An upgrade of the electrical and electronic parts has also been carried out. In addition, the reel-unloading system has 1200mm arms as standard – replacing 900mm
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arms – allowing it to manage longer reels. In addition, at K2022 last year, it showed its TCA 64C+ duplex turret slitter rewinder. This has been designed to combine a compact design with a configuration that allows a separate unwind stand. It is aimed at converters who need high perfor- mances and speed.
Chinese supply Goebel IMS has supplied two new primary slitter rewinders to a Chinese producer of BOPET film, Zheijiang Yongsheng Technology Co. A Monoslit Optical 6000 BOPET is used to
convert technical films such as optical-grade films. With its multi-functional slitting unit (including shear cutting) and optional by-pass spreader roller, the machine can convert both thin and thick films. With special surface coatings for the guide rollers and the possibility to install web-cleaning devices and other special units, a wide variety of applica- tions can be covered, it says. The second machine, a Monoslit 9000 BOPET, is designed for high-speed converting of mainly packaging grade films – and runs at speeds of 1200 m/min. A new agreement to supply two more primary
slitter rewinders – a Monoslit 9000 BOPET and a Monoslit Giant 11000 BOPET – has since been
April 2023 | FILM & SHEET EXTRUSION 33
Main image: Bimec has extended its dual-spindle slitter rewinder range with the STB 550
IMAGE: BIMEC
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