PRODUCTS FINISHING — PFonline.com
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value is automatically adjusted ten times per second to the
external conditions. The different control variables are
optimally coordinated just as often.
Innovative Oven Concepts
The biggest energy consumer after the spray booth is the
oven. In order to reduce the energy requirement, fresh and
exhaust air can be controlled according to the number of car
bodies in the oven. This means a process-optimized volume
flow and thus reduced energy consumption during breaks
or in the case of different capacity utilization. In the latest
designs, the car bodies no longer pass lengthwise through
the oven, but rather in cycles perpendicular to the conveying
direction.
This operation revolutionarily permits heating from
the inside. Through the windshield opening, nozzles are
used to blow hot air with high discharge ranges into the
vehicle interior. The result is a significant improvement of
the leveling characteristics with up to 30-percent shorter
heat up times and by up to 25-percent reduced energy
consumption.
Innovative Plant and Application Technology
Today, a painted car body ideally needs only around 400
kWh of power. A few years ago, even more than three times
that amount was sometimes needed. VOC emissions can
now be pushed well below the permissible value of 35 g/
m². Water consumption has also been reduced by almost
60 percent.
This was achieved mainly by dry overspray separation
and the use of rotation dip technology in pretreatment. In
the end, paint consumption too could be reduced by almost
50 percent. Besides lower costs, less paint consumption
also means less residual materials and solvent emissions.
Sustainable automotive paint finishing is not a just a
vision; it has become a reality. Numerous individual solu-
tions, products and systems contribute to this achieve-
ment. It would nevertheless appear that an integrated
concept has a greater impact than the sum of the indi-
vidual components.
LIQUID COATINGS
C L I N I C
Seeking Sustainability
Q: How can our shop decrease energy use on
our paint line?
A: Find this answer and more from our expert
clinicians in the Liquid Coatings Zone.
PFonline.com/zones/painting