At ProfilGruppen, we have three separate presses, each of which can press up to eight extrusions at the same time. After pressing, the extrusions are cooled with air and/or water depending on the alloy. After this, the extrusions are straightened in hydraulic stretching equipment and cut into suitable lengths. Finally if specified, the strength of the extrusions is increased by thermal aging, where the material’s natural hardening process is accelerated by heating for five to eight hours at approximately 180 degrees Centigrade.
The press opening indicates the maximum limit of what can pass through the press, an extrusion design must therefore be kept to within these outer limits. In addition, a tool is required that can press the required extrusion in an efficient and accurate manner. Extremely large or small extrusions often require special consideration during component and tool design with regard to material thickness etc.