How does the die evolve in the aluminium extrusion process?
In the aluminium extrusion process, the die is an important part of the extrusion process, as it is the part that determines the final shape of the profile coming out of the press. To ensure that the extruded aluminium profile conforms to the manufacturing drawing, the die usually undergoes a correction process, where the necessary adjustments are made for optimal performance. These adjustments are sometimes complex and take time until the die is commissioned.
The process to obtain an aluminium profile begins with the receipt of the customer’s drawing. The technical, tooling and quality teams analyse the feasibility of the profile, proposing recommendations or adjustments to guarantee the feasibility of manufacturing. Once an agreement has been reached with the customer, the die is ordered for the extrusion of the profile.
When the die is received, a first extrusion test is carried out. This test gives an insight into possible problems with the die. Subsequently, the quality and tooling teams check the geometry of the profile and, if necessary, adjustments are made to the die. At this point, the correctors, based on a sample and the first tip of the extruded profile, determine the necessary corrections to solve the problems or deviations detected.
Correctors apply various fitting techniques, depending on the specific situation and accumulated experience. Their skill and knowledge are key to the success of the aluminium extrusion process, as each profile can present unique challenges.
Once the necessary corrections have been made, the die is tested again. If the aluminium profile meets the standards, a sample is sent to the customer and the die is nitrided. This process, through the introduction of nitrogen, hardens the steel of the die, increasing its strength and extending its service life. However, during nitriding, the thickness of the die may increase, which may require further corrections, lengthening the process slightly.
Thanks to this careful procedure, Extrugasa, as a supplier of aluminium profiles, guarantees both the correct functioning of the die and the quality of the extruded aluminium profiles. In addition, it ensures the proper maintenance of the die, programming the necessary nitriding according to the volume of extruded billets and the thickness of the material.
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