Black Regrind PP → White PP
Factory Reset Challenge

Black Regrind PP → White PP

Colour change & carbon removal on 1300 Tonnes Injection Moulding Machine

Factory Reset Challenge

The Process

Carbon visible in Poly Clear 100 purge –

Stripes shown from mixing nozzle

Black Regrind PP White PP purge process
Black Regrind PP White PP purge process

Barrel Blitz Universal bringing out carbon contamination

Black Regrind PP White PP purge process

65 kg of BBU (left and central) First Purge of Natural PP (Right)

Black Regrind PP White PP purge process
Black Regrind PP White PP purge process
  • 1st shot (Top Left)
  • 2nd an 3rd shot (Bottom Left)
  • Total: 3 scrap (Right)
Black Regrind PP White PP purge process

45 minutes purging + 20 minutes moulding 8 shots:

2 scrap parts for colour from the hot sprue bush

Black Regrind PP White PP purge process

Results

Normal results:

  • 6 hours total
  • Purge 100 kg of PC/PP GF • Nozzle pull and clean
  • 4 hours moulding (360 kg)
  • 20 years since last screw clean

 

Aquapurge results:

  • 45 minutes purging
  • 15 kg Poly Clear 100
  • 65 kg Barrel Blitz Universal (first deep clean)
  • 2 scrap mouldings One Year On:
  • 15 kg Poly Clear 100
  • Barrel Blitz Universal once/year
  • 10 minutes change
Black Regrind PP White PP purge process

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