Understanding Aluminium Extrusion A Short History of Aluminium Extrusion How Aluminium Extrusion Works – Step by Step 1. Hotting the Billet The aluminium billet, a solid spherical block, is heated to about 400–500°C until it becomes soft, but not melted. 2. Pressing Through the Die A hydraulic press pushes the heated billet through a Darshan […]