Sizes (ml)	from 3 to 1.000
Raw Materials	PEHD, PVC and PP
Products	Consumer bottles Pharmaceutical bottles
Markets	Consumer Pharmaceutical Chemistry
Advantages	Available for a large variety of raw materials Lower investment
Inconvenients	Unit cost higher compare with IBM technology Neck finish quality

 

The blow moulding machine is based on a standard extruder barrel and screw assembly to plasticise the polymer. The molten polymer is led through a right angle and through a die to emerge as a hollow circular pipe section called a parison. When the parison has reached a sufficient length a hollow mould is closed around it.

 

The mould mates closely at its bottom edge thus forming a seal. The parison is cut at the top by a knife prior to the mould being moved sideways to a second position where air is blown into the parison to inflate it to the shape of the mould.

After a cooling period the mould is opened and the final article is ejected. To speed production several identical moulds may be fed in cycle by the same extruder unit.