PET Bottle Blowing & Filling Line

PET bottle production starts from injection-moulded preforms, which are heated and blown into the finished bottle shape inside a mould. The blow moulding machine is specified by cavity count and bottle volume — a two-cavity machine producing 0.6 to 2 litre bottles serves a different output level from a four-cavity machine.

Rolangear supplies semi-automatic and automatic blow moulding machines, including two-cavity 0.5 to 2 litre machines and four-cavity PET bottle blowing machines. Alongside these, the catalogue includes the filling, capping and labelling equipment needed to complete a bottling line: liquid and bottle filling machines, rotary and linear capping machines, and round-bottle and flat labelling machines.

This suits beverage and liquid product manufacturers who want to produce their own bottles rather than buy them in. Blowing in-house removes bottle transport cost and gives control over bottle design, which is why many bottling operations add a blowing machine as their first capital step.

Whether to connect blowing and filling into one continuous line, or run blowing separately and store bottles, is a decision Rolangear can advise on — it depends on your output, your floor space and your product. Rolangear plans the configuration, specifies the equipment, supplies it, and supports installation, commissioning and operator training. Scope is confirmed per project in a written technical proposal.

A PET bottling line is normally built from the following equipment groups:

• Preform handling — preforms are loaded and fed to the blowing machine.
• Blow moulding — semi-automatic or automatic machines, specified by cavity count and bottle volume.
• Filling — liquid and bottle filling machines matched to product viscosity and fill method.
• Capping — rotary, linear and pneumatic capping machines matched to your closure.
• Labelling — round-bottle, double-side and sleeve labelling machines.
• Conveying — air and belt conveying between stages.

A bottling line requires a clean production area with sufficient floor space for the line in sequence, plus preform and finished goods storage. Compressed air at high pressure is required for blow moulding; three-phase electrical supply is required. Specific loads and air requirements depend on the machines selected and are confirmed in the technical proposal.