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Working principle of twin screw extruder

2024-09

Summary: The twin-screw extruder not only has the characteristics of a single-screw extruder, but also has the advantages of feeding and turning, stable extrusion, and convenient exhaust. Widely used in the production and processing of extruded products.
Working principle of twin screw extruder

The twin-screw extruder not only has the characteristics of a single-screw extruder, but also has the advantages of feeding and turning, stable extrusion, and convenient exhaust. Widely used in the production and processing of extruded products.
Next this article will detail the working principle of twin-screw extruder and future research direction. Let's take a look at it together.

The basic principle of the role of twin screw extruder:
The twin-screw extruder has the basic principles of extrusion of a single-screw extruder: solid conveying, melt pressurization and pumping, mixing and stripping and evaporation, but not limited thereto. Twin-screw extrusion theory research and development is relatively late, coupled with its wide variety, messy screw shape, messy extrusion process, to bring many difficulties to the study.
In general, the twin-screw extrusion theory research is still in the development link, known as "more technology than science". From the perspective of the whole process of extrusion, there are about three parts: the rules of change of state of polymer in the extrusion process, the basic principles of transportation, the transportation of solid melt, the exhaust phase and the law, and the establishment of mathematical physics The model is used to coach the planning of the twin-screw extruder and the optimization of the extrusion system process.

The future research directions of twin screw extruder are as follows:
1. The physical model and mathematical model of the twin-screw extruder are established to guide the design of the twin-screw extruder and the optimization of the extrusion process.
2. To find out two or more kinds of polymers and materials in the whole process of extrusion in the real state of change, mixing form, the whole process of structural changes and the later mixing and characteristics of the relationship between them.
3. As a twin-screw extruder, the internal relationship between the whole reaction process, speed and characteristics of extrusion reaction molding and the screw structure and operating conditions is established. It can be extruded by reaction molding.


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