A Single-Screw Extruder is a machine used in the manufacturing process to shape materials, primarily plastics. It consists of a single rotating screw that pushes the material through a heated barrel. As the material moves along the screw, it is melted and mixed, allowing for uniform processing before being shaped into various products. This type of extruder is commonly used in industries such as packaging and automotive, where it helps create items like plastic films and pipes. The design is simple and efficient, making it a popular choice for many applications in the field of polymer processing.