Tissue360 - Fall/Winter 2016 - 25
"The right service helps to improve the efficiency of your tissue machine
and keep maintenance costs to a minimum"
-Johannes Kraxner, Andritz service specialist
"Yankee service starts by being near the customer, ready to act. We
accompany the customer through the complete yankee lifecycle"
-Erwin Walcher, Andritz service specialist
yankee is one of the key challenges in tissue production. Drying hoods
on a yankee dryer need to have a balanced air system; however, due
to the suction slot ahead of the ingoing nozzle box, there is typically
an infiltration of dirt into the system. This leads to a plugging of the
first nozzle and the immediate area surrounding it. Sheet breaks
and sometimes even fires might be the consequence. Andritz offers
a rebuild with a specially designed air nozzle. The existing part is
removed by cutting off the suction slot and the new AirKnife is added.
The rebuild ensures that the dirt is no longer drawn into the slot, but
is blown away by pressurized air.
When talking about overhauls, headbox overhauls come foremost
to mind-they are a real speciality of our service teams. Headboxes
work in very demanding environments: heat, moisture, and
vibration. Over time, their performance will degrade as the forces
of corrosion, damage to the lips, the wear of adjustable components,
and defects in the heating channels take their toll. When this
happens, sheet quality and operational safety can be impacted. The
decision then becomes "replace" or "recondition?"
Andritz offers an annual service to inspect, recondition, and, when
necessary, rebuild headboxes from any OEM to restore the performance-while extending the life of the customer's initial capital
investment. The headbox overhaul service includes a lot of specific
actions, including lip repairs. Since any damage to the top or bottom
lip-even the smallest scratches-will have a negative impact on CD
sheet profiles, we offer lip repair service as an alternative to costly
replacements. Our specialists will perform all of the operations-levelling, planing, grinding, shaping, and deburring-to bring the lips
back to specifications. These operations can be directly done on-site
in the mill or in our workshops in Austria (Graz).
Headbox lip repair: cost-efficient repair instead of cost-intense exchange.
Comprehensive services for yankees from ANDRITZ AG.
Is Andritz offering anything new in terms of service to mills?
A real highlight of the Andritz tissue services is the yankee lifecycle
management. It includes customized solutions for new yankees and
rebuilds and escorts the customer through the complete yankee life
cycle. No matter if cast or steel, no matter what brand and what end
product (tissue, paper, board, MG paper, tobacco). The services include
solutions and support for upgrades and replacements, safety, production, and analysis (e.g. on the run measurements). A real highlight
is the Andritz coating and grinding with mobile units directly at the
customer's site-this is worldwide unique. Grinding up to 6,800 mm
yankee shell length is possible, and coating is done with three spray
guns at the same time.
Can you talk more in depth about what ANDRITZ is offering
mills to save on maintenance costs?
Andritz has spent a lot of effort in developing service solutions to
improve production efficiency and quality at the same time as reducing maintenance costs. One innovative result is, for example, the
Tissue360º FALL/ WINTER 2016