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UGE014/0999 Water/Spray Tanks
TROUBLESHOOTING 6-3
PRODUCT
QUALITY
PROBLEMS
Problem
Poor surface quality:
Swirls on the surface.
Poor surface quality:
Dimples on the
surface
Possible cause
Is the extrusion dragging
against the calibration
tooling or tank edges?
Are air bubbles adhering
to the extrusion surface,
causing uneven cooling?
Solution
Check alignment.
❒ Increase spray bar flow.
❒ Increase agitation in the
water tank.
❒ Add an anti-static agent
to the water.
This section contains product quality problems that may be be
related to WT/ST tank operation. Of course, other sections of
the extrusion line also influence the quality of the extruded
product. This section does not provide solutions to problems
that originate with other equipment on the extrusion line.
WATER SYSTEM
PROBLEMS
Problem
No water flow.
The pump is run-
ning, but water flow
is very low.
Possible cause
Is power and the correct
voltage reaching the
pump?
Has the pump overload
tripped?
Is there a blockage in the
flow path?
Solution
❒ Verify that the emergency
stop button has not been
activated, and check all
power connections.
❒ Verify that the supply power
matches the rating on the
motor data plate
If necessary, manually reset
the pump overload by pressing
the reset button. Verify the
overload is set to the FLA
specified on the motor data
plate. If the correct voltage is
reaching the pump and the
overload continues to trip, you
may need to replace the pump.
❒ Check the heat exchanger
for blockages.
❒ Check for a restriction in
the spray bars.
This section contains problems that may be be related to
optional water recirculation system on the WT/ST tank.