From figure 15 it can be observed that the aluminium flows in two directions just like the aluminium flow seen
in Figure 13. The split flow of aluminium causes wear of the coated parts thus reducing die life. It is also observed
that the wear region on one side of the die is more than the other thus it can be deduced that aluminium flows faster
on one side of the die than the other. Another assumption made for the deform simulation is that the coating layer is
free from cracks and burs. When the mandrel and die plate are coated the surface generally has small cracks or burs
that during aluminium extrusion increase the wear rate due to abrasive and adhesion wear. The results generated
from the simulation provide a benchmark for the extruder to test the optimized die design and compare it with the
results generated for the coating simulation thus giving the die manufacturer a rough estimate of the service life of
the die.