Die Design for Extrusion of Plastic Tubes and Pipes

"Die Design for Extrusion of Plastic Tubes and Pipes" covers this topic from a uniquely practical perspective. The content draws on the author's over 50 years of experience in the plastics processing industry, most recently as head of the successful extrusion die manufacturing company he established in 1995. His approach is oriented toward solving production problems at the design stage using computer aided techniques for design and simulation of the plastic flow. The book provides a step-by-step guide to extrusion die design, with worked examples to illustrate problem solving. It is shown how important melt flow variables (e.g., pressure drop, shear stress, shear rate, temperature variations, and distribution variations, etc.) of key materials are determined using FEM software. The detailed drawings of complete dies for various applications that are provided constitute a rare and valuable resource. Both mono- and multilayer pipes are covered. Using the proven methods and examples from this book, the reader is well-equipped to understand dies for successful manufacture of tubes and pipes of many types. Contents: Basic Considerations Project Planning Design of a Simple Die Simulation of Melt Flow Spiral Die Monolayer Die for Tubes Ø1 mm to Ø6 mm Monolayer Die for Tubes Ø4 mm to Ø16 mm Monolayer Die for Pipes Ø50 mm to Ø125 mm Monolayer Die for Pipes Ø140 mm to Ø315 mm Coextrusion Pipe Dies Coextrusion Die (Ø5 mm to Ø16 mm) Coextrusion Three-Layer Die (Ø20 mm to Ø65 mm) Three-Layer-Plus-Striping Die for Ø25 mm to Ø110 mm Pipes Materials for Extrusion Dies