What are the characteristics of Extruder screw barrel?

Update:May 08,2023

An extruder screw barrel is a critical component of an extrusion machine that is used to melt and shape plastic materials into a desired form. The extruder screw barrel is made up of two main parts: the screw and the barrel.

The screw is a cylindrical metal rod with a helical flight on its surface. As the screw rotates inside the barrel, it transports plastic pellets from the feed hopper to the die, while simultaneously heating and melting the plastic. The helical flight on the screw also provides a kneading action, which helps to mix and homogenize the plastic.

The barrel is a hollow metal cylinder with heating elements that surround it. The barrel is designed to keep the plastic material at a specific temperature, which varies depending on the type of plastic being processed. The barrel also provides pressure to the plastic as it is being transported by the screw, which helps to ensure consistent melting and shaping of the plastic.

Extruder screw barrels are available in different configurations and sizes to suit different extrusion applications. They may be made from a variety of materials such as carbon steel, stainless steel, or bimetallic alloys, depending on the specific application and required performance.

In summary, the extruder screw barrel is a critical component of the extrusion process, enabling plastic materials to be melted and shaped into a desired form. The screw and barrel work together to transport, melt, and shape the plastic, providing the necessary pressure and temperature control to ensure consistent results.

Extruder screw barrel for PVC plastic machine

Material: 38CrMoAlA, 42CrMo(JIS SCM440), SKD11,61
Diameter: Φ15mm-350mm
Application: Suit for cable , sheet , pipe , profile
Nitride Case Depth: 0.5mm-0.8mm
Nitride Hardness: 1000-1100HV
Nitride Brittleness: ≤Grade One
Surface Roughness: Ra0.4um
Screw Straightness: 0.015mm
Alloy Hardness: HRC68-72
Designing: Screw structure and compression ratio can be designed according to different products & different output re quirement.
For what plastic machine: extruder/extrusion machine