Bar extrusion

The extrusion is one of the pressure-forming Production processes and is used to manufacture metallic profiles with different geometries. The process is used in the metal processing industry and in the construction industry, inter alia, for the production of hollow profiles.
The extrusion allows the user to produce metallic profiles also with complex shapes such as irregular prismatic profiles. The technology is distinguished in particular by a high cost-effectiveness compared to alternative methods at low unit numbers. The extrusion is mainly used for aluminum components, but also for other materials.

Technical basics for extrusion

In the extrusion process, a material block, which is also referred to as a compact, is first heated to its material-specific forming temperature. In the case of the frequently used material aluminum, this forming temperature is about 450 to 500° C. The compact thereby obtains the kneading properties which are necessary for the subsequent deformation. A round aluminum bolt is usually used as the starting material, the diameter depending on the size and force of the press used.

Subsequently, the block is pressed with a punch through the forming die. A so-called recipient encloses the block during this process and ensures that the pressure required for the deformation can be built up. Depending on the system, pressing forces of several thousand tons are used.

For what purpose is extrusion used?

The extrusion process is used in the metal processing industry, in the construction industry and in other industries for the production of pipes and irregularly shaped prismatic profiles.

Some typical products of extrusion:

Which variants are there?

During extrusion, a distinction is made between the direct and the indirect process variant:

Direct extrusion

During direct extrusion, the material block is inserted into the surrounding recipient and pressed through the die by means of a stamp. This method variant is characterized in that the recipient and the tool are fixed.

Which materials are processed by extrusion?

The extrusion process is predominantly used for producing profiles of aluminum or aluminum alloys. It should be taken into account that the process parameters such as the forming temperature or the cooling power of the press depend on the material used and must be varied accordingly. In addition to aluminum, further materials are also processed by the process.

The materials at a glance:

Find companies for extrusion

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