PP bottle making machine refers to a plastic processing machine that produces polypropylene (PP) bottles through extrusion blow molding or injection blow molding. Here are some key details:
- Polypropylene is a popular plastic used for bottles due to its high strength, rigidity, chemical resistance and weldability.
- In extrusion blow molding, PP granules are melted and extruded into a hollow tube called parison. The parison is then clamped and blown into a bottle mold.
- In injection blow molding, the parison is first injection molded before being blown into the final bottle shape. This gives more control over parison dimensions.
- The machine consists of an extruder barrel, parison die head, blow mold station and calibration mechanism.- Blowing can be accomplished with high pressure air or a stretch rod that mechanically stretches the parison into the mold.- Molds are usually multi-cavity allowing multiple bottles to be produced with each machine cycle.- Machines may be continuous extrusion blow molding, intermittent or rotational molding.
- Advanced machines have microprocessor controls for adjusting blow air, timing, temperatures, etc.
- Output depends on number of cavities, parison programming and machine speed. Over 2000 bottles per hour is possible.
- Automated machines handle demolding, flash trimming and waste disposal.So in summary, PP bottle making machines use blow molding to produce PP bottles of different shapes, colors and volumes in a continuous, cost-effective manner. The versatility of blow molding allows customized bottle design.
