How to start blow moulding machine?
Ans- A. Method -1
1. Turn on power to the die-head heater bands. If applicable, turn on die-head
preheaters. Set the die-head heater to 275°F.
2. After the die head temperatures have reached the set points, turn on power to the extruder heaters. Set heater to 275°F.
3. After the extruder temperatures have reached the set points, raise all set points to
325°F.
4. After the die head and extruder temperatures have reached the set point, proceed to Step II.
B. Method – 2
1. Turn on power to all extruder- and die-heater bands. If applicable, turn on die-head preheaters. Set all temperatures to 325°F.
2. After the die head and extruder temperatures have reached the set points, allow
30 minutes for machine heat to stabilize.
3. Proceed to step II.
II. After the temperatures have reached the set points:
A. Turn off the die-head preheaters.
B. Start the hydraulic system.
C. Start extruding polymer at minimum screw speed. CAUTION: Head pressure and
extruder motor amperage should be watched closely to be sure levels do not exceed
manufacturer-recommended maximums.
D. Set temperatures at desired operating levels.
lll. After temperatures have once again reached the set points:
A. Turn on the chiller for mold cooling.
B. Gradually increase extruder speed to the proper operating level.
CAUTION: Head pressure and extruder motor amperage should be watched closely to be sure levels do not exceed manufacturer-recommended maximums.
C. Open the valve that supplies pressurized air to the blow molding machine. The air
pressure range should be 80 psi -120 psi. Pre-blow air should range from 5 psi – 15
psi.
IV. Set timers and die programmers to the established settings.
V. Start the blow molding machine on its automatic cycle for continuous operation.