Yellow HDPE → Natural HDPE
Colour Change and Decarb on 6.3 Litre Accumulator Fischer Müller
The Process
Large carbon lumps during colour change procedure.
Indication of decarbonising requirement
Large quantity of small carbon
specs and historical colours
indicative of decarbonising
procedure
BBU highlighted
carbon on screw and other high
compression areas
Poly Clear HMEX
clearing out Barrel Blitz Universal.
HDPE making good parts
Results
Normal results:
Shut Down
- Purge with HDPE
Start Up
- First 2-3 hrs 100% scrap
- 6 hrs till scrap level acceptable
- 10% scrap over run
Aquapurge results:
Shut Down
- 25kg Poly Clear HMEX
Start Up
- 40kg Poly Clear HMEX
- 25kg BBU (yearly)
- 20kg Poly Clear HMEX
- 2% rejects on first 500 parts
- 1% rejects over production run