time to cool. Take proper precaution with PPE and pliers when removing the plastic from
the Garbage Shoot to avoid injury.
9. From here you may proceed into regular manual extrusion operation or choose to
shutdown following manual mode shutdown procedure as outlined in the “Manual
Extrusion” section of this manual.
5.1.2 Disco Purge
Disco Purging means we are going to thermal cycle the Prot to help transition from one
material to another. It is strongly recommended to remove nozzles for the duration of a disco
purge and replace it only when purging is complete with a new nozzle. Removing the nozzle will
require preheating in order to soften the plastic inside to release the nozzle. Please refer to
Table 2 for nozzle removal temperatures.
Steps:
1. Remove nozzle and follow steps 1-8 of section 5.1.1 (Short Purge).
2. After your first 10 minute cycle, immediately set your temperature slider to 0 C. The
auger will limit its speed as the extruder cools and material melt resistance increases.
3. Once the extruder reaches the temperature of the “Lower Temperature” material’s nozzle
removal temperature (see Table 2 for reference), increase temperature back up to the
Purge Temperature.
4. Purge for 10 minutes.
5. Repeat steps 2-5 until completely transitioned to the new material.
5.2 Purge Tips
1. Purging plastic – especially from a warmer temperature plastic to a cooler temperature
plastic – can take a long time. It is recommended that you avoid or mitigate the need for
switching plastics as much as possible.
2. Use different colorants as an indicator when purging to distinguish between old and new
plastic.
3. When purging dissimilar materials, the general rule is to look at the MSDS
documentation to see where the extrusion (purge) temperatures overlap. Importantly, do
not increase temperature so high that you burn the old or new material inside of the
extruder. But what if there is no overlap in the two materials’ processing temperatures? If
this is the case, please contact Technical Support immediately for assistance, stating
what plastics you are transitioning from and to. ReDeTec will advise further.
4. Having an extra nozzle (with breaker plate and screen) is especially useful when
switching between materials to not contaminate the new material!
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Summary of Contents for ProtoCycler+
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