Paper Technology International 2024 - Journal - Page 97
PAPERTECHNOLOGYINTERNATIONAL
Figure 6: OraFlex press section.
Figure 7: Dust removal system.
The rigid doctor back, complete with torque arms, maintains
the correct working position and safeguards the right stability in case
of paper break, while electro-mechanical or pneumatic oscillation
helps improve cleaning ef昀椀ciency on the cylinder and ensures
correct operation even at the highest production speeds [6].
Another aspect that is usually underestimated but that could
make a great difference in the drying area is a
device that could improve the overall drying process by
avoiding paper dust and trims from causing problems: the brandnew version of our dust removal system [7] can be installed both on
昀氀exible and rigid blade holders, on all formats.
It consists of a suction box screwed directly on the body
of the crossbeam and a suction nozzle on the blade holder, thus
concentrating the suction where it is most needed, close to the
blade, thanks to an adjustable front part that can be adapted to 昀椀nd
the most performing position.
The adoption of the dust removal system does not affect
the 昀氀exibility of the blade holder in any way and at the same time it
guarantees high ef昀椀ciency as it is speci昀椀cally conceived to limit air
leakages.
Figure 8: OraThread.
It can be equipped with electromechanical or pneumatic
oscillating system, which in many paper mills is more appreciated in
these positions where there are high temperatures.
Flexible hoses are always preferred for high temperatures as
well, but the system can be provided with different hoses available
for every type of installation.
Its compact and open structure allows for fewer maintenance
issues and fewer product non-compliance issues, as it really
guarantees an easier removal of dust and avoid contamination, thus
entailing higher product quality.
In addition, all doctors of the drying area can be equipped
with the OraThread or OraShoot systems, that allow threading the
tail from one roll to another without the need for ropes, the most
dangerous elements of paper machines [8] [9].
Air blows can be installed on OraClean rigid doctors or on
OraFlex 昀氀exible doctors and they both offer signi昀椀cant bene昀椀ts,
including improved machine operator safety and superior ef昀椀ciency
in terms of time and energy saved, making the operation fully
automated.
Figure 9: OraThread bottom roll
installation.
ORADOC Srl
Via dei Pasquinetti, 183
55100 S.Pietro a Vico – Lucca
ITALY
www.oradoc.net
info@oradoc.net
tel. +39 0583 306454
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