Aluminium extrusion is a mechanical process during which aluminium billets are converted into profiles. Simplified sequence of the extrusion process: at the beginning, the aluminium billet is pre-heated to required temperature, and then a powerful press pushes aluminium billet through the so-called matrix. Matrix is made out of hardened steel with some machined cavities/holes matching the shape of desired aluminium profile. Once the desired aluminium profile is pushed through the matrix following processes then executed including, stretching, cutting & tempering which are vital in order to obtain final product mechanical properties.
- the billet, under the influence of the force of the piston, moves through the matrix cavity, splitting the profile;
- extruded aluminium profile is cut to the desired length and transported to the ageing furnace. At controlled temperature, the required profile hardness is achieved;
- subsequently, profiles are packed in solid, transportable packaging (wooden crates, stillages etc.).