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Extrusion Blow Molding Material Change with EasyPurge Purging Compound

PA to HDPE

Goal: Material change and Black Specks Removal

Summary: 

Machine: Moretti 

Extruder Diameter: 100 mm

Material: PA to HDPE

Colour: Black to Clear

Industry: Automotive

Factory Location: Spain

Normal Results using Virgin Material

Time: 7:00 Hours
Virgin Material: 800 Kgs of HDPE

EasyPurge Purging Compound:

Time: 1:30 Hours
Easypurge Purging Compound: 0.8 Kgs
Virgin Material: 120 Kgs of HDPE

In order to improve the efficiency of the purging compound, the temperature of the accumulator was increased by 30 °C.

Dose of 240ml of Easypurge purging compound was added into the hopper followed by virgin material.

 

This process was repeated 3 times.

The purging material emulsifies the rest of the impurities and pigments due to additives and surfactants contained in the formula.

After 1:30 hours there were no presence of PA Black colour.

Note: There were no presence of stains during the next 2 shifts reviewed after 24 hours.

Final Results:

 

Time

Scrap

Presence of Black Specks

Virgin Material

7:00 Hrs

800 Kgs

Yes

EasyPurge

1:30 Hrs

144 Kgs

No

Comment by the Process manager:

“Knowing that we won’t have black specks during production give us peace of mind. My favourite part is that we will keep the quality team away during production”.

Determined to reduce production scrap?

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Let’s improve quality and simplify your purging process while reducing change-over time, together.

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