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Extruder Core Component-Screw Elements

The screw element is an important component of the extruder, and the wear resistance and corrosion resistance are important indicators for considering the service life of the screw element.

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Screw Elements

The screw element is an important component of the extruder, and the wear resistance and corrosion resistance are important indicators for considering the service life of the screw element.

Extruder Core Component-Screw Elements

  • Do/Di: The ratio of outer and inner diameters determines the average shear rate, devolatilization effect and powder feeding ability
  • Do: outer diameter
  • Di: Inner diameter
  • a:Center distance

 

 Material

Condition

W6Mo5Cr4V2 38CrMoAla 316L stainless steel Powdered nickel-based alloy Imported HIP powder alloy
Wear resistant ☆☆☆☆ ☆☆ ☆☆ ☆☆☆☆☆☆ ☆☆☆☆☆☆☆
Corrosion resistance ☆☆☆ ☆☆☆☆ ☆☆☆☆ ☆☆☆☆ ☆☆☆☆☆

 

Screw Configuration

  1. Screw configuration refers to the structural composition of the extruder screw. Different combinations can meet the production requirements of different materials. The screw
    configuration can achieve dispersion, shearing and other effects, and solve the requirements for uniform mixing of materials, which is of great significance to production stability.
  2. Different screw elements have different functional characteristics. We should choose and design the right screw elements based on different extrusion status in order to optimize the
    overall comprehensive performance in the extrusion process.
  3. Tightly meshing screws eliminate dead zones in the entire process section through their tight, self-cleaning screw combination, resulting in high process reliability and optimized self-
    cleaning capabilities.

Screw Configuration

ZONE MAIN FUNCTION
Feeding Zone Feeding raw materials into the extruder
Conveying Zone For conveying heated materials
Melting Zone For heating raw materials to make some or all melt
ATM Zone For removing the volatile matter and moisture
Mixing Zone Make the material fully mixed evenly
Vacuum Venting Zone Completely remove volatiles and moisture to achieve the desired state
Extrusion Zone Extrusion Metering Granulation

 

CNC Machining Center

CNC machining center

 

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