BLOW MOLDING MACHINES

Blow Molding Process Comparison

By: Jeff Newman
  Shuttle Wheel Injection Blow Injection Stretch (1-Step) Reheat Stretch (2-Step) Recip Screw Accumulater HD
HDPE Yes Yes Yes No No Yes Yes
PP Yes Yes Yes Sometimes No Yes Yes
PET No No Yes Yes Yes No No
PVC Yes Yes Yes No No No No
Styrene No No Yes No No No No
Multilayer / coinjection Yes Yes Difficult Difficult Difficult No Difficult
IML Yes Yes No No No Difficult Difficult
Handleware Yes Yes No No No Yes Yes
Injection Finish Good Fair Excellent Excellent Excellent Fair Good
In-machine Deflashing Yes No N/A N/A N/A No No
Flashless Process No No Yes Yes Yes No No
Small Bottle
<100 ml
low/med vol. 		Yes No Yes No No No No
Small Bottle
<100 ml
high vol. 		Yes Maybe Yes No No No No
Med. Bottle
(1 litre)
low vol. 		Yes No Yes Yes No Yes No
Med. Bottle
(1 litre)
high vol. 		Yes Yes No No Yes Yes No
Large Bottle
(4 litre)
low vol. 		Yes Yes No No No Yes No
Large Bottle
(4 litre)
low vol. 		No Yes No No No Yes No