The extrusion die is one of the most critical elements of an extrusion system. However, very few books have been devoted exclusively to die design. This book will combine a thorough engineering approach to die design with a practical, hands-on approach. The authors together have over sixty years of experience in extrusion and die design. They have been involved in all aspects of die design: polymer rheology, analysis of flow, layout of extrusion dies, testing of new extrusion dies, troubleshooting die related problems, maintenance of extrusion dies, etc. The book will be a valuable resource to any person involved with extrusion dies. Not only to people that design extrusion dies but also to people that set up extrusion dies, troubleshoot die flow problems, maintain extrusion dies, and to students that learn about extrusion in schools, colleges, and universities