Aluminium can be extruded to form intricate shapes and sections. It is heated to around 500 degree C and pushed through a die at great pressure.
Aluminium extrusions are used in commercial and domestic buildings for window and door frame systems, prefabricated houses/building structures, roofing and exterior cladding, curtain walling, shop fronts, etc. furthermore, extrusions are also used in mass transportation for airframes, road and rail vehicles and in marine applications.
Factors that influence the properties of the final product are: Type, layout and design of the die, length and type of alloy, temperature of billet and container, die and tolling temperature, speed of extrusion. These factors, coupled with inexpensive tooling, create near limitless possibilities for design.
Extrusions typically undergo a number of fabrication and/or finishing processes to transform them into usable components, such as an auto part or construction material and many other applications. The fabrication process generally starts with cutting the extruded length, followed by punching, machining, bending or welding.