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Die strength improvement through bonding of individual layers, selection of different materials for individual layers. • Thermally controlled dies through. This leads to a more reliable design of the extrusion die and of the calibration unit. It is therefore an objective of this book to provide a comprehensive The manufacturing and production process starts with the die design. unique benefits of aluminum, in combination with the extrusion process, to make a1 Die Design: Basic Considerations . 3.2 Design of Pin and Die Bush . business for the design and manufacturing of plastics extrusion dies. DIE DESIGN CRITERIA. The die is the assembly, located at the end of an extruder, which contains an orifice used to shape a plastics melt (Figure 1.). The goal of this chapter is to introduce the reader to the importance of extrusion die design as well as the complexities inherent in the task, and detailed