Aluminium extrusion is the method used to form lengths of aluminium of specified profiles.
The process of aluminum extrusion is fairly easy to understand.
In aluminium extrusion, the die is held fixed and the aluminium billet is forced through the die using a moving ram.
Aluminum extrusion is used in the manufacture of solid rods, bars, and hollow tubes. The structure of the tool can be modified to produce a wide multiplicity of hollow and solid profiles.
The melting duration of aluminum is almost 660° Centigrade. Aluminium extrusion operations typically take place with billet heated to temperatures over 375°C, and - depending upon the alloy being extruded - as high as 500°C.
Aluminium extrusion is generally used in construction, automobile and aircraft manufacture, industrial machinery, and consumer goods.
There are three main categories of extruded shapes:
Solid, with no enclosed voids or openings
Hollow, with one or more voids
Semi-hollow, with a partially enclosed void