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Articolo pubblicato nel fascicolo di Ottobre 2023 di Carta & Cartiere IN PAPERMILL


LEIPA Georg Leinfelder in Germany produces white covered test liner on PM 3 in a weight range of 125-200 g/m2 at a width of 4500 mm and operating speed of 1000 m/min.

di: SchäferRolls GmbH & Co. KG

The company noticed extreme wear in the Fourdrinier wire drive roll and the need of frequent roll replacement and associated new coatings. After a running for only six months the standard rubber was already so worn that a new cover was needed.

Due to the complex replacement technology in this position, increased time and consequently high cost went hand-in-hand with a roll replacement, as the Fourdrinier also needed to be replaced. To extend the service life, SchäferRolls recommended changing to a roll cover material with significantly better transfer of the drive energy, a reduction of shrinkage and roll cover wear resulting from this. The results speak for themselves: after running for 243 days there were no measurable signs of wear or abrasion, particularly in the previously critical edge areas.

Andy Redenz, Master MTA at LEIPA in Schwedt confirmed: “The cover on the roll was checked again on 2 February 2021 after 243 days of running. Apart from some discoloration, no areas have shrunk or become worn on the operator or drive-side screen edges. The cover still looks good” (Fig. 1).

Consequently, the desired running time of 12 months can be reached along with further operation after grinding. The costs are also convincing: Just over EUR 20,000 have been saved by using the new roll cover material (Fig. 2) and as a result of this all of the replacement rolls have already been changed to

Fig 2: Total Cost of Ownership (TCO) shows the savings after the switch to the cover.


SchäferRolls GmbH & Co. KG, based in Renningen, Germany, was established in 1946. With by now over 300 employees worldwide, the company manufactures technologically sophisticated and high-performance roll systems and roll covers for all industries, particularly for the paper, foil, textile, printing, furniture, packaging and metal industry, as well as for machinery and plant engineering.

Production facilities are located at Renningen (Germany), Brnik (Slovenia) as well as at Farmington, NH and Covington, VA (USA) with a total production area of more than 32,000 m².