Everything about the co-rotating twin-screw extruder. In the production of plastics, especially in the processing and conversion into finished products, extruders are used, with the co-rotating twin-screw extruder playing a dominant role. However, they are also widely used in other industries, such as rubber and food processing, and increasingly in the pharmaceutical industry. It is a multifunctional machine. This technical book provides a comprehensive insight into the process and machine engineering fundamentals and places a strong emphasis on practical examples. The screws are usually modular in design, allowing for great flexibility in adapting to changing tasks and product characteristics. In-depth knowledge of the machine and the process is essential for the optimal design of a twin-screw extruder.