Co-Rotating Twin-Screw Extruders: Fundamentals

Copyright: 2020
ISBN: 978-1-56990-747-4
Hardcover: 412 full-color pages
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Introduction. Historical Development of the Co-Rotating Twin Screw. Rheological Properties of Polymer Melts. General Overview of the Compounding Process:  Tasks, Selected Applications, and Process Zones. Geometry of the Co-Rotating Extruders:  Conveying and Kneading Elements. Modeling:  Possibilities and Limitations. Pressure Generations and Energy Input in the Melt. Computational Fluid Dynamics. Mixing and Dispersing: Principles. Degassing Polymer Melts with Co-Rotating Twin Screw Extruders. Simulation or Scale-Up — Alternatives for Extruder Layout? Screw Elements for Co-Rotating, Closely Intermeshing Twin-Screw Extruders. Overview of Patented Screw Elements. The ZSK Series and Applications in the Chemical Industry and for Renewable Raw Materials. ZSK-NT the New Two-Stage Processing System for High Throughputs. Material Selection for Twin-Screw Extruders Components in Contact with Resin. Drive Units for Co-Rotating Twin-Screw Extruders.


Co-rotating twin-screw extruders are extensively used for the preparation, compounding, mixing, and processing of plastics, but also in other industry branches, such as in rubber and food processing, and increasingly in the pharmaceutical industry too. Derived from the classic, bestselling work "Co-Rotating Twin Screw Extruders," this book brings much of the content up to date, with an expanded focus on the fundamentals of co-rotating twin-screw extrusion, including functional zones in the extruder, screw elements, material behavior, flow properties, performance behavior, and application of computational fluid dynamics.

Co-rotating twin-screw machines usually have modular configurations and are thus quite flexible for adapting to changing tasks and material properties. Well-founded knowledge of machines, processes, and material behavior is required in order to design and operate twin-screw extruders for economically successful operations. With chapters written by many expert authors from industry and academia, this book provides valuable information on applications from a practical perspective, suitable for both beginners and experienced professional engineers.

Author Info:

Klemens Kohlgrüber

Dr. Klemens Kohlgrüber undertook a metalworking apprenticeship and completed further training as a mechanical engineer in Cologne. He studied mechanical engineering in Wuppertal, followed by a diploma and doctorate at RWTH Aachen University. From 1986 to 2015, he worked for Bayer AG, among other things as Head of High Viscosity, Mixing, and Reactor Technology. At the same time, he gave lectures for several years at the University of Dortmund for chemists in the master’s program on polymer processing/preparation. For several years he was head of the High Viscosity Technology working group of the Forschungsgesellschaft Verfahrenstechnik (German Research Association for Process Engineering) and he is a former member of the Association of German Engineers (VDI) advisory board for plastics processing technology. Dr. Kohlgrüber also leads annual VDI seminars on extruders.