Introduction to the principle of twin-screw plastic extruder First, the twin-screw extruder has the extruder principle of a single-screw extruder: solid conveying, melting, pressurizing and pumping, mixing, stripping and devolatilization, but it is not just that. The study of twin-screw extrusion theory started late, coupled with its many types, complex screw geometry, and complex extrusion process, which brought many difficulties to the study. On the whole, the research of twin-screw extrusion theory is still At the initial stage, this is the so-called "skills more than science". From the research of its extrusion process, there are roughly three links:

1. The law of polymer state change during the extrusion process, the conveying principle, the truth and law of conveying and exhausting solid melt, and establish a mathematical and physical model to guide the design of the twin-screw extruder and the extrusion process optimization.

2. It is necessary to clarify the true state of two or more polymers and materials during the extrusion process, the mixing form, the process of structural change, and the relationship between the final mixture and the performance.

3. As a twin-screw extruder, the internal connection between the reaction process, speed, performance and screw configuration and operating conditions during the extrusion reaction molding is established to guide the reaction molding extrusion.