Aluminum extrusion process is a forming process by applying pressure to an aluminum billet (billet) that has been heated to the limit temperature, extruding aluminum through a mold with shaped holes to receive products with the shape of the design. Extrusion products have got big length. The product samples have been designed in terms of shape, size and color before performing the extrusion process.

 Aluminum extrusion process details as bellow

• Heat the billet to a temperature of about 450-500°C for the billet reaches the required temperature

• To move the billet to the billet holder department

• The effect of pressure on the billet by the push rod.

The billet is deformation by under the pressure, shorter and larger size until  it touch into the side of the container and pressed to the mold. To increase the life of the mold, liquid nitrogen or inert gas can be used to cool the mold and avoid oxidation of the mold.

Under the effect of heat and pressure, solid aluminum is extruded through shaped holes in the mold.

When the product comes out of the extruder, A meter is required to check the temperature of the product coming out of the mold to know the temperature of the pressing process (it called the real technology temperature) This temperature is changed to depending on the billet material

Table of billet temperature on the hot pressing

Image: Deformation of aluminum billet when pressed into the mold

• After products is pulled out of the press machine, the product is guided and cooled by the water system
• With the alloy 6061, water and air quenching have the same quenching effect.
• The product continues to move on the cooling table and pull for extra strength and stiffness.
• Cut the product to the right length, move to an artificial aging furnace or let it age naturally, then anodize, color or powder coating as required