What are the advantages of twin screw extruders?
The co-rotating parallel twin-screw extruder has strong self-cleaning ability. Since the two threaded sleeves are intertwined, the contact part forms a continuous space curve with uniform clearance. With the synchronous rotation of the two, the space curve moves with it, forming the self-control effect between the screws. At the same time, the glue on the thread surface is cleaned to ensure the characteristics of no residual material.
The twin-screw extruder has strong adaptability. For high viscosity materials, low shear rates can be processed with a shallow groove screw. For materials with high shear rate or high screw speed, deep groove screw is more suitable for improving extrusion quality and output. The thread meshing of the international advanced co-rotating twin-screw machine realizes equal-gap meshing, which greatly improves the self-made performance and processing capacity of the screw, and broadens its application field. The kneading block can internally mix materials. Increasing the number of kneading blocks in the twin-screw extruder can increase the number of kneading and improve the quality of kneading. The increase of the pressure in the kneading zone increases the kneading resistance, increases the kneading strength, and significantly improves the kneading quality.
The twin-screw snack extruder adopts side feeding technology, which improves the integrity of the material and greatly increases the output. The location and shape of the feed port also have a great impact on the feed efficiency. Under the same parameters, the feed area increases and the output increases. Under the same inlet area, the rectangular section has higher feeding efficiency than the circular section. The use of side twin screw feed is also based on this consideration.
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