1.Plastic Resin: The process starts with plastic resin pellets, which are typically made from materials like polyethylene (PE), polypropylene (PP), or other similar plastics.
2.Melting and Extrusion: The plastic resin is heated until it becomes molten and is then extruded through a die, forming a tube-like shape called a parison.
3.Molding: The parison is placed into a mold cavity that has the desired shape of the final product. The mold is typically made of two halves that come together to enclose the parison.
4.Blow Molding: Compressed air is introduced into the parison, causing it to expand and take on the shape of the mold. This process is what gives the product its hollow interior.
5.Cooling: The molded plastic is allowed to cool and solidify inside the mold.
6.Ejection: Once the plastic has cooled and solidified, the mold opens, and the finished product is ejected.
Extrusion blow molding is a widely used technique for producing various plastic containers and bottles because it can be a cost-effective and efficient process for large-scale production. The specific design and operation of extrusion blow molding machines can vary depending on the manufacturer and the type of products being produced.