The purpose of a
screw barrel in manufacturing processes, particularly in plastic and rubber processing, is to facilitate the melting, mixing, and conveying of materials. Here are some specific purposes:
1.Melting and Heating: The screw barrel is responsible for melting and heating the raw material, such as plastic pellets or rubber compounds, using heat generated by the barrel heaters. The rotation of the screw generates frictional heat, which raises the temperature of the material.
2.Mixing and Homogenizing: As the material moves along the screw barrel, the rotating screw's design helps to mix and homogenize the molten or softened material. This ensures consistent composition and properties of the material.
3.Pressure Build-up and Conveying: The screw barrel applies pressure to the molten material, compressing it and building up the necessary pressure to force it through the barrel. The rotating screw conveys the material forward, pushing it towards the nozzle or die.
4.Metering and Control: The screw barrel allows for precise control of the material flow rate. The design and rotation speed of the screw can be adjusted to control the amount of material being delivered, ensuring accurate and consistent production.
5.Injection or Extrusion: Depending on the specific manufacturing process, the screw barrel facilitates either injection molding or extrusion. In injection molding, the molten material is injected into a mold cavity, while in extrusion, the material is forced through a die to create continuous profiles or shapes.
Overall, the screw barrel plays a crucial role in transforming raw materials into desired forms by melting, mixing, pressurizing, and conveying the material during the manufacturing process.
Single screw barrel for injection molding machine
Heat treatment: Nitriding treatment, Bimetallic coating for abrasion
Applicable Industries: Manufacturing Plant, Machinery Repair Shops, Plastic Machinery
Product type:
For different plastic screw can be used: ordinary type, pin type, barrier type, separation type, exhaust type.
Base material:
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
3)9Cr18MOV
Process:
Heat treatment
High-frequency quenching
Nitriding treatment
Hard-chrome electroplating
Bimetallic alloy welding
Bimetallic alloy centrifugal casting
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