Aluminium extrusion is a manufacturing process that transforms aluminium billets into specific shapes and profiles by forcing the material through a shaped die. This process is widely used across industries for its efficiency and versatility.

What are the main steps in the aluminium extrusion process?

  1. Preparation of the Aluminium Billet:
    The process begins with preheating the aluminium billet, typically to temperatures between 400°C and 500°C. This softens the aluminium, making it malleable for extrusion.
  2. Die Design and Preparation:
    A customized steel die is created based on the desired profile. The die is then preheated to prevent temperature-related stress during the extrusion process.
  3. Loading and Extrusion:
    The softened billet is placed into the extrusion press. Using hydraulic or mechanical force, the press pushes the billet through the die, shaping it into the desired cross-sectional profile.
  4. Profile Cooling:
    Once the aluminium exits the die, it is rapidly cooled using air or water to maintain its shape and prevent warping. Cooling methods depend on the alloy and profile complexity.
  5. Stretching for Alignment:
    The extruded profile may undergo stretching to correct any distortions and ensure the product has the correct dimensions and alignment.
  6. Cutting to Length:
    The extruded profiles are cut to the required lengths, either for further processing or final use.
  7. Finishing Operations:
    Post-extrusion, the profiles may undergo surface treatments like anodizing, powder coating, or machining to enhance aesthetics and functionality.

This streamlined process results in precise, high-quality aluminium profiles used across numerous applications.