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Aluminium Extrusion Fabrication - Read More
Aluminium Fabrication - Read More
Aluminium Extrusion - Read More

The Aluminium Extrusion Process

The extrusion process consists initially of heating an Aluminium billet weighing up to 48kg to a temperature of approximately 500°C. Whilst still in a hot malleable state the billet is placed in a steel container and pushed through a steel die by means of an hydraulic ram capable of exerting over 1600 tonnes of pressure. The billet is forced through the die, emerging as an aluminium extrusion.  The profile emerges at a speed of 5–50 metres per minute and reaches a length of 25–45 metres.

The emerging extruded section is cooled afterwards, either by air or by water as it is guided along a moving runout table. To ensure that the profiles are straight and to release internal stresses, the profiles are stretched after cooling. They are also checked to ensure that all key functional dimensions are correct and that the surface quality is satisfactory.

Finally the section is cut to the length specified by the customer and may then go through a further heat treatment operation, depending upon the properties required.