A plastic cap manufacturing machine is used to produce plastic caps and closures for bottles, jars, tubes and other containers. Here are some key details:
- These machines mold caps from plastic materials like polyethylene, polypropylene, polystyrene etc.
- The most common manufacturing processes are injection molding and compression molding.
- In injection molding, plastic granules are melted and injected under high pressure into a mold to form caps.- In compression molding, plastic blanks are preheated and shaped in molds under pressure.
- The molds are precisely machined to create cap features like threads, lining, overcaps and tamper evidence bands.
- Caps can have screw threads or slip-on/snap-on geometries to fit bottles and jars.
- Cap manufacturing machines have multiple cavity molds for mass production. Output can range from 100 to 1,000 caps per minute.
- Most machines are hydraulic or electric servo powered for precise control of pressure, temperature and speed.- Advanced machines have technologies like multi-component molding to apply seals and liners in the caps.- Automated parts handling, stripping and finishing processes are integrated for complete production.
- Secondary processes like tamper-evident perforations, printing, lining insertion and packaging can also be integrated.
- Caps made are lightweight yet durable and provide excellent leak-proofing and pilfer resistance.In summary, plastic cap manufacturing machines enable efficient mass production of versatile plastic caps and closures using injection molding or compression molding processes.
