HOW TO PURGE

Injection

Procedure for injection :

1

Check that all zones are in the proper temperature range for the grade of ASACLEAN™ being used.

2

Retract the injection unit, run the barrel empty, wipe clean the hopper feed throat and nozzle.

3

Dose the required amount of ASACLEAN™ into hopper. Approximately 1 or 2 barrel capacities of ASACLEAN™ is required for a typical moulding machine. The actual amount depends on the difficulty of the application and the condition of the equipment. Start with one barrel capacity.

4

With screw completely forward increase the back pressure to maximum safe level, approximately 90% of maximum.

5

Increase RPM to 90% of maximum and purge out the barrel.

6

Drop the back pressure after the ASACLEAN™ coming out of the nozzle is clean.

7

Retract the screw and perform high velocity injection shots.

8

Repeat steps 1-7 if contamination is still visible.

9

Once ASACLEAN™ is visibly clean, introduce the next polymer to be used or increase temperatures if necessary.

Indicative Quantities of ASACLEAN™ U (for cleaning ABS at 240° C)

Screw diameter
32 mm
36 mm
50 mm
60 mm
115 mm
ASACLEAN™ quantity in kg
ca. 0,5
ca. 0,6
ca. 0,9
ca. 1,2
ca. 8,0

Overview of grades for moulding machines

ASACLEAN™ U
Improved universal grade
180° C - 360° C
ASACLEAN™ GL 2
Universal grade
180° C - 360° C
ASACLEAN™ CG
Glass-filled grade for higher cleaning power
180° C - 330° C
ASACLEAN™ NEwEX
Glass-filled grade for higher cleaning power
200° C - 360° C
ASACLEAN™ PX2
High temperature grade with glass fibre
280° C - 420° C
ASACLEAN™ NEWE
Special grade for change to transparent material
160° C - 270° C
ASACLEAN™ UP
Special grade for PP
170° C - 300° C
ASACLEAN™ UB
Special grade for PE
170° C - 320° C
ASACLEAN™ NEWM
Special grade for PMMA
180° C - 320° C
ASACLEAN™ PT
Special grade for PC
200° C - 360° C
ASACLEAN™ SX
High temperature grade
300° C - 390° C
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