This article outlines the differences in processes and production efficiency among various models of twin-screw extruders, classified by screw rotation direction, screw structure, intermeshing degree, purpose, and specification. It discusses the specific applications, characteristics, and production efficiencies of co-rotating and counter-rotating models, parallel and conical designs, and general-purpose versus specialized extruders. The article also highlights the factors affecting production efficiency, such as screw design, rotation speed, material properties, and process parameters, providing a comprehensive guide for selecting the right twin-screw extruder based on material, process, and production scale.

For a twin-screw extruder, the screw is mainly divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section. Threaded components mainly include conveying, melting, shearing, material mixing, residence time control and other functions. The threaded elements of the twin-screw extruder are combined in a "building block" manner. In practice, they can be adjusted according to different production needs. Therefore, screw combination is the key to customizing the twin-screw extrusion process.

The auxiliary equipment of the twin-screw extruder unit mainly includes a pay-off device, a straightening device, a preheating device, a cooling device, a traction device, a meter counter, a spark tester, and a wire take-up device. However, because of the different purposes of the twin-screw extruder, the auxiliary equipment used in the selection is also different, such as cutters, blow dryers and printing devices. So let us understand in more detail what a twin-screw extruder is.

What is the difference between a conical twin-screw, a parallel counter-rotating twin-screw, and a parallel co-rotating twin-screw extruder?Classification of twin-screw extruderAccording to the direction of rotation of the twin-screw, the extruder can be divided into two extruders: the same directio