Black ABS V0 → Natural PP
Material Change and Carbon Removal
The Process
Start up with BBU
Indication of poor shut down procedure
Max Back Pressure = More carbon
Indicates Heat sensitive materials processed
First two shots; zero specs
First 12 acceptable mouldings,
still no colour/carbon
1 hour production
50 products
0 black specs
Results
Normal results:
- Purge with 30 kg of PP
- Pull and clean nozzle
- Black spec/colour lines for 3 hours: 171 kg
Aquapurge results:
- 25 kg BBU
- 25 minutes
- 0 black specs
One Year On:
- Refined shut down procedure