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CHANGING THE NOZZLE
Before attempting this operation please use insulated gloves. To switch between nozzle sizes to
heat up the unit to17 c. Unscrew the nozzle, clean off any excess plastic from the internal
threads, then screw on new nozzle.
COLOUR MIXING
Adding colours is simple. Mix the natural and the colorant at the given ratio, then pour it into the
hopper. It will take 10-20 minutes to see changes in the colour. It is also possible to mix col-
orants to create new colours. For example, mix blue and yellow make green.
MAINTENTANCE
Regular cleaning of your plastic extrusion tooling during the disassembly process lengthens tool-
ing life, helps reduce waste and helps maintain tighter tolerances for your final product. Use a
wire brush and fine metal pick to clean the threads and the screw assembly
LUBRICATION
The thrust bearing assembly will require occasional lubrication; this is a relatively simple opera-
tion, simply unscrew the brass grease nipple and squirt a 2 second burst of a lubricant like
WD40 Lithium Grease. For optimal performance we recommend this procedure is carried out ev-
ery 100 hours of operation.
BARREL JAM
Depending on what type of resin you are using, you may experience a barrel jam. If at any time
during extrusion the motor starts to labour and slow right down then you should switch off the
motor immediately. A good way to free the jam is to turn the temperature up to say 230-240c and
leave this for 1 – 20 minutes, then switch on the motor again; this should allow the screw to ro-
tate again. Also using a blow torch to heat the barrel just past the hopper will usually release any
solidified plastic and free the screw.
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