The purpose of die adjustment is to control and check the materials flow through the die, which has a significant impact on the final extrusion form.
Once the die been adjusted and approved, its surface is hardened to extend its life. This is normally done using a surface nitriding process or applying a titanium coating.
In general, the costs for extrusion dies are low. Roughly speaking, die costs are 1/10 of those for die casting tools. The delivery times for dies are also very short. Standard dies are delivered 2–3 weeks after the order is placed. This has an enormously beneficial effect on the costs of a development project. Die costs vary according to extrusion size and complexity.
In general terms, costs can vary from around SEK 8,000 for a simple die producing a solid extrusion, up to SEK 100,000 for a complicated die designed to produce a large hollow extrusion.