Extrusion Blow Molding Colour Change with EasyPurge Purging Compound
HDPE BLACK TO HDPE NATURAL
Goal: Downtime reduction
Machine: Mateu & Sole (Spain)
Extruder Diameter: 120mm
Colour: Black to natural
Normal results using virgin material:
Time: 8:30 Hours
Virgin Material: 960 Kgs of HDPE
Using EasyPurge Purging Compound:
Time: 3:00 Hours
EasypurgeAPC: 1,2 Kgs
Virgin Material: 135 Kgs of HDPE
First we increased the temperature of the accumulator by 30 °C to improve the efficiency of the purging compound.
Previous production of Black HDPE suitcases. →→→→→→→→→→→
Although we could have used the doser built in the bottle, to automate the procedure, we decided to use Easypurge APS (Automatic Purging System) device for dosing 1.2 Kgs of Purging Compound.
The purging compound emulsifies the impurities and colour pigments.
Learn more about how Easypurge works
After 3 hours there was no presence of colour contamination.
24 hours later we confirmed there was no presence of black contamination during the next two shifts.
Comment by the Process manager:
“The dose of Easypurge purging compound was easy using the Automatic Purging System, we have had cleaning process under control at all time”