Plastics extrusion is a manufacturing process suited for continuous profiles with a fixed cross-
section. The function of the extrusion die is to reshape the melt, which originally has a
circular cross-section, to the desired profile shape. When constructing new extrusion dies,
the key challenge is to design the transition region between outflow and inflow of the die.
While in general the design of the transition region is arbitrary, there are influences on the
shape accuracy of the product which need to be considered during die design. One of those …