Service HotlineExtrusion blow molding is a process that heats plastic parison and inflates them into shape, and is widely used in the manufacture of hollow thermoplastic products. The following are its main application fields and process characteristics:
Application field
1. Packaging containers : Bottles, barrels, cans, boxes and other containers are widely used in the fields of food, beverages, cosmetics, medicines, etc.
2. Industrial supplies : packaging for chemical products, containers for lubricants and storage containers for bulk materials.
3. Automotive parts : fuel tank, shock absorber, seat back, center bracket, etc.
4. Other fields : toys, balls, corrugated pipes, and the shells of machinery/furniture, door frames, etc.
Process characteristics
1. Material diversity : Commonly used materials include high-density polyethylene (HDPE), polypropylene (PP), polyvinyl chloride (PVC), etc. Engineering plastics have also been increasingly applied in the automotive field in recent years.
2. Uniform wall thickness : The wall thickness of the products is usually uniform, with small weight tolerance and low requirements for subsequent processing.
3. High mold cost : The mold design is complex, but the cost is moderate, making it suitable for mass production of small precision products (such as medicine bottles).
4. Process steps : These include key steps such as parlet extrusion, mold closure, blow molding, and cooling and demolding, with precise control of parameters at each stage required.