High-speed rebuild exceeds customer expectations - Voith

Modern and dependable again – Voith rejuvenates a 26-year-old VariRoll
High-speed rebuild exceeds customer expectations
25 I 2008 I Voith Paper I twogether
REBUILDS
Rebuilt VariRoll at M-real in Biberist
Thanks to this rebuild the M-real paper mill in Biberist, Switzerland,
can now depend fully on their ageing VariRoll center drum winder.
After modernization, this VariRoll is no less reliable and userfriendly
than a brand new machine.
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REBUILDS
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Control desk prior to rebuild
Operating system after rebuild
With a working width of 5,100 mm,
this center-drum winder handles
wood-free coated art paper in the
basis weight range 45-135 g/m2 at an
operating speed of 1,800 m/min.
Scope and duration of rebuild
This rebuild mainly involved complete
mechanical revision at the Krefeld
works of all wind-up stations, upgrading
the control system to S7-technology,
and modernizing the safety and
operating concept to the current state
of technology. Voith took less than
seven days for all this, including dismantling
the old wind-up stations,
laying 7.5 km of new cables, and
troublefree re-commissioning of the
rebuilt winder.
Operator guidance for
professionals
This new operator guidance concept
centers around the well-proven Vari-
Tronic control and operating system.
It enables for example optimal adjustment
and monitoring of the knife
positioning, winding hardness measurement
and line force generation.
Particularly useful is the possibility of
storing roll format specifications and
winding parameter data. This not only
assures faultlessly wound rolls of consistently
high quality, but also saves
the customer valuable time otherwise
needed for winder adjustment.
Mill computer data can also be fed to
the system for optimal setting of the
VariRoll parameters.
25 I 2008 I Voith Paper I twogether

Ejection of finished paper rolls
The outstanding success of this rebuild
project was thanks to rigorous
time and cost management, smoothly
coordinated teamwork between the
customer and Voith, and not least to
Voith’s enormous experience with
winder rebuilds.
All requirements fulfilled
The results speak for themselves:
● Absolutely square paper roll ends,
● Excellent winding hardness
structure,
● Faultless paper roll quality
and exemplary controllability as well.
25 I 2008 I Voith Paper I twogether
Customer Comment
Martin Stocker
Project Manager
M-real Biberist,
Switzerland
“Our old VariRoll was hardly recognizable
afterwards – Voith rejuvenated it so
quickly and successfully that all our
expectations were not only met but also
exceeded. It now produces paper rolls
of faultless quality, and the machine is
much easier and safer to operate. In a
nutshell: our rebuild decision has paid off
in full.”
Contact
Robert Koch
Finishing
robert.koch@voith.com
REBUILDS
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