2021/11/29 · According to the number of screws, extruders can be roughly divided into single-screw extruders, twin-screw extruders, and three-screw extruders. The twin-screw extruder machines can also be subdivided into coaxial twin screw, conical twin-screw, co-rotating twin-screw, and parallel twin screw. Single screw extruder is the most basic extruder