Product Descriptions
Extrusion blow molding is a manufacturing process used to create hollow plastic objects, such as bottles, containers, and other hollow shapes.
It is commonly employed in the plastic packaging industry to produce a wide range of products. An extrusion blow molding machine is a specialized piece of equipment used in this process.
Here's how the extrusion blow molding process works and how the machine operates:
Extrusion: The process begins with plastic resin pellets being fed into a hopper on the extrusion blow molding machine. The pellets are then melted and formed into a parison (a hollow tube of molten plastic) using an extrusion screw. The parison is typically shaped like a test tube.
Mold Closure: The parison is positioned between two halves of a mold, which is often made of two metal halves that can be clamped together. The mold is shaped like the final product and has a cavity into which the molten plastic will be blown.
Blow Molding: Once the mold is closed, pressurized air is introduced into the parison, causing it to expand and take the shape of the mold cavity. The air pressure pushes the plastic against the mold walls, creating the desired hollow shape. The mold remains closed until the plastic has cooled and solidified.
Ejection: After the plastic has cooled sufficiently, the mold is opened, and the newly formed hollow plastic object is ejected from the machine. The excess plastic from the parison's neck and bottom (referred to as flash) is trimmed off.
Cycle Repeats: The cycle then repeats for the production of the next object. Modern machines can be highly automated, allowing for efficient and continuous production.
Extrusion blow molding machines come in various sizes and configurations, depending on the specific requirements of the products being manufactured. They can range from small machines used for single-serve bottles to larger machines used for producing larger containers.
Key components of an extrusion blow molding machine include:
Extruder: Melts and forms the plastic resin pellets into a parison.
Mold: Defines the shape and size of the final product.
Clamping System: Holds the mold halves together during the blowing process.
Blow Pin: An air nozzle that introduces pressurized air into the parison.
Cooling System: Helps cool and solidify the plastic within the mold.
Trimming Station: Removes excess flash from the finished product.
Extrusion blow molding offers advantages such as high production rates, cost-effectiveness, and the ability to create complex shapes.
It is commonly used for producing plastic bottles, containers, automotive components, toys, and more
Powerjet Double Station Extrusion Blow Molding Machine
Specialized for manufacturing bottles and containers which under 10L.
Max Bottle Capacity - 10(L)
Clamping Force - 65~110(KN)
Extrusion Weight(HDPE) - 35~125(kg/hr)
Applications - Wide Range Of Bottles For Food & Non-Food
FEATURES
Toggle balance clamping structure, with platen opening & clamping and mold platen movement by linear guide, to achieve low friction and high speed.
Based on the Finite Element Analysis design, and platen, toggle and platen frame made in high intensity nodular cast iron.
High speed mold clamping oil cylinder with differential speed function, and high speed mold moving cylinder with special anti-shock cushion valve structure.
Specially designed screw with high L/D ratio insures good plasticizing and stable extrusion; high precision and no part line die head guarantees customers' top quality requirement.
Multi-screw & multi-die head can be adopted to improve the quality of the product and lower down the cost of material.
Multiple-way PID controlled temperature heating is precise and stable.
