The Extrusion Process
How does the extrusion process work?
Aluminium profiles are either solid shapes or have a complex network of cross sections at their centre. They are used in dozens of industries and are used as parts in a massively diverse range of products. Aluminium is soft and malleable so it lends itself beautifully to the extrusion process. First, the aluminium is heated to 350–500 C. It is then forced through a specially cast steel die using a high-pressure ram or hydraulic press. As the semi-molten aluminium passes through the die it takes on its unique shape. The result is a piece that can be easily joined to others with corresponding features, e.g. T-slots enable manufacturers to join bars using special connecting pieces that fit perfectly into the cavities.
Aluminium extrusion is a specialised method that is relied upon by industries around the globe. Profiles can be made existing standard dies to produce profiles such as round tubes, flat bars and angles used in dozens of countries or they can be customised with bespoke tooling to meet the needs of specific clients.