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Turn water pump on, if you have the optional
recirculation system.
After the tank has been filled, press REC START button.
Start the other equipment in the extrusion line.
Gradually increase line speed.
Raise extruder rpms
slowly until extrudate is close to the product desired.
Wet tank rim lightly and close lid. Dip fingers
into tank water and wet the tank rim to improve the seal.
Adjust water flow and water levels. The best
water flow rates and levels depend upon your material,
process and cooling mode.
Water/Spray Tanks UGE014/0999
4-4 OPERATION
Tank operation is stopped by turning off the water pump.
Extrudate will continue to move through the tank unless the
entire extrusion line is shut down. A typical shutdown proce-
dure is given below.
Move the tank downstream. While the material
is still running, turn the large handwheel to move the tank
away from the die.
Lower extruder rpms.
Cut the plastic off at the die with a soft metal
spatula or scraper.
Cover the tank entrance hole.
Place one hand
over the hole to limit water spillage when you stop the
pump.
Turn the water pump off. Press REC STOP.
Drain the tank and reservoirs if the tank will
not be used ore requires water system mainte-
nance.
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STOPPING THE
WT/ST TANK
STARTING THE
WT/ST TANK
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NOTE: You should check profile size and surface
finish at start up and periodically throughout pro-
cessing. Check the size of the profile using an
optional in-line laser gauge, ID or OD gauge. Check
the surface finish for imperfections. See the
T
ROUBLESHOOTING section for product quality prob-
lems that could be related to the WT/ST tank.