MACHINERY | SLITTERS AND REWINDERS
Right: Hosokawa Alpine’s AW winder
combines the advantages of its 700 and AWD models
This can include monitoring the transfer paste nips and the programmed nip force for the pressure roll while winding. Variation in unwinding and winding web tensions – during and after a transfer – can be observed and compared to setpoints. And thirdly, make sure that cut-off knives on both the unwind and winder are sharp enough for clean cutting of the web. The timing of knife
IMAGE: HOSOKAWA ALPINE
hour or more of lost production time.” Cloud-based platforms can provide the digital tools needed to diagnose and predict when degradation of a critical element reaches a certain level. An example is DS Activ-Check – a customis- able, cloud-based platform that uses sensors, predictive analytics and control programs to supply real-time data about critical parameters and key performance indicators (KPIs). Davis-Standard has created several examples of how analytics – using a cloud-based platform – can support operations based on typical challenges in roll-to-roll web processing. The first is to continually monitor roll diameter and the concentricity of incoming rolls of material to the unwind. A laser or other advanced sensor can accurately measure the roll and provide feedback to ensure that concentricity is within an acceptable range. If the measurement is out of range, an operator is immediately warned. The line can be automatically slowed down or stopped to adjust and avoid a poor or missed splice. Secondly, predict issues that impact roll change performance. Sensors on the unwind and winder can highlight pressure issues beyond the acceptable variation for consistent transfers and quality winding.
replacement will vary depending on the abrasive- ness of the web material and the speed and diameter of rolls being processed. Smart technol- ogy tracks the number of times the knife has been fired in order to predict sharpness, maintenance, and potential replacement. “Our industry has reached a point where scrap, downtime, and lost production due to missed splices during the unwinding and web transfer process can be prevented,” said the company. “Implementing tools that increase the productivity
and profitability is absolutely essential in the years ahead.”
ICE breaker Several slitter and winder manufacturers presented their latest developments at the ICE converting exhibition, which was held recently in Munich in Germany. One of them, LAEM IMS, presented two of its machines. Riboslit is its new, compact slitter-re- winder designed for flexible packaging converters – requiring minimum operating space and invest- ments; and TR4, a robust, automated slitter-rewind- er designed for high productivity and efficiency requirements.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.hosokawa-alpine.com �
www.colines.it �
www.davis-standard.com �
www.ice-x.com �
www.laem-ims.com
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