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SEAL PLATES (Cont.)
The metal core of the coating roll and of the doctor roll should be parallel and
square so that the UHMW seals the ends of the rolls. If a straight edge is not
flush against the steel cores of both the coating roll and doctor roll, one roll will
need to be moved horizontally, so that the steel ends are flush.
DOCTOR ROLL DRIVE CLUTCH
(Upgrade Option Only, not on all coaters)
The doctor roll drive allows the speed of the
doctor roll to be changed independently
from the coating roll speed. This feature
eliminates the lines on the coating roll when
the doctor roll turns too fast. The slower the
doctor roll turns, the smoother the coating is
on the coating roll. A lighter coating can also
be achieved when the doctor roll is turning
slower.
The drive incorporates a friction clutch so
that the clutch can be set with just enough
friction to turn the roll using the motor, but
light enough to allow the doctor roll to free
wheel during clean-up when the doctor roll
is against the coating roll with a good
amount of friction.
The clutch is adjusted by loosening
the set screw that holds the outside
tightening ring in place and then
screwing the outside ring tighter.
The set screw must be tightened when
the adjustment is complete.