What are the advantages of the twin screw extruder?

The tray twin screw extruder was developed on the basis of the single screw extruder. Due to its good feed performance, mixing and plasticizing performance, exhaust gas performance, extrusion stability, etc. it was widely used in molding extrusion products. For more information about the twin screw extruder, please read teh following words.

 

What is the internal structure of the twin screw extruder?

What is the difference in flow rate distribution between twin screw extruder and single screw extruder?

What are the advantages of the twin screw extruder?

 

What is the internal structure of the twin screw extruder?

The twin screw extruder used for profile extrusion is usually tightly combed and counter-rotating, although some also use a twin screw extrusion which generally works with a relatively low screw speed of about 10/min. Interlocking, concurrent high speed twin screw extruder for compounding, suction or as a continuous chemical reactor, the maximum screw speed range of this extruder type is 300–600 h/min. The non-interlocking extruder is used for mixing, suction and chemical reaction, and its conveying mechanism is significantly different from that of the interlocking extruder, which is closer to the conveying mechanism of the single screw extruder, although there are significant differences between the two.

 

What is the difference in flow rate distribution between twin screw extruder and single screw extruder?

At present, the flow rate distribution of the material in the single-screw extruder is quite clearly described, while the flow rate distribution of the material in the twin-screw extruder is quite complicated and difficult to describe. Many researchers simply do not consider the material flow in the engagement area to analyze the flow velocity field of the material, but these analytical results differ greatly from the actual situation. The flow situation in the area of intervention is quite complex. The complex flow spectrum of the material in the twin screw extruder shows macroscopic advantages that the single screw extruder cannot achieve, such as e.g. etc.

 

What are the advantages of the twin screw extruder?

1.The kneading block can mix materials inside. By increasing the number of kneading blocks in the twin screw extruder, the number of kneading operations can be increased and the kneading quality improved. Increasing the pressure in the kneading zone increases the kneading resistance, increases the kneading strength and significantly improves the kneading quality.

2.The thread engagement of the concurrent twin screw machine realizes the same gap engagement, which greatly improves the self-made performance and processing capacity of the screw and expands its application field.

3.The twin screw extruder has strong adaptability. For highly viscous materials, low shear speeds can be processed with a flat groove screw. For materials with high shear rate or high screw speed, the deep groove screw is better suited to improve extrusion quality and performance.

 

Nanjing Haisi Extrusion Equipment Co., Ltd. is a high-tech company composed of an experienced team in R.D. design, manufacturing technology, sales service, and has been based on extruder industry for many years.