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The principle of co-rotating parallel twin-screw extruder
The research on the theory of co-rotating parallel twin-screw extruder started late, coupled with its many types, complex screw geometry and complex extrusion process, which brought many difficulties to the research. The research on twin-screw extrusion theory is still in its infancy, which is called"Craft more than science".From the research of its extrusion process, it can be divided into three parts:
1. It is necessary to find out the real state of the physical state change of two or more polymers and materials during the extrusion process, the mixing form, the process of structural change, and the relationship between the mixture and its properties.
2. As a twin-screw extruder, the internal relationship between the reaction process, speed, performance and screw configuration and operating conditions during reaction molding is extruded, and a model is established to guide the reaction molding extrusion.
3. The laws of changes in the physical state of polymers in the extrusion process, the truth and laws of conveying and exhausting of solid melts, and the establishment of mathematical and physical models to guide the design of twin-screw extruders and the extrusion process. optimization.
The contract direction is developed with the modification of polymers, and the research on twin-screw extrusion theory cannot adapt to the development of the application. A consensus has been formed around the world, and it has become a research hotspot.
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