The Principle of Twin Screw Extruder
Basically a twin screw extruder shares the same extrusion theory as a single screw extruder: solid polymer conveying, melting, pressurizing and pumping, mixing, stripping and devolatilizing, but it has more than this. Due to late theoretic study With many styles, the late study, complex screw geometry and the complex extrusion process, the study of Twin screw extrusion is difficult.
Generally speaking, the theoretical study of twin screw extruder is still in the initial stage, which is called "art than science." From its study of the extrusion process, probably divided into two components:
1. It is apply to guide the design of twin screw extruder and extrusion process optimization, as physical state changes, Delivery Principle, Solid melt delivery,ect during the process of polymer extrusion.
2. It is necessary to find out the truth of polymers and materials physical state changes in the process of extrusion, mixed form, the process of structural change, and relationship between the final mixture and performance.
Generally speaking, the theoretical study of twin screw extruder is still in the initial stage, which is called "art than science." From its study of the extrusion process, probably divided into two components:
1. It is apply to guide the design of twin screw extruder and extrusion process optimization, as physical state changes, Delivery Principle, Solid melt delivery,ect during the process of polymer extrusion.
2. It is necessary to find out the truth of polymers and materials physical state changes in the process of extrusion, mixed form, the process of structural change, and relationship between the final mixture and performance.
