The twin-screw extruder has developed rapidly, its output, torque and speed have been greatly improved, and its application has become increasingly widespread. Improving production efficiency, improving product quality, and realizing multi-functional equipment are the basic requirements for achieving high-performance co-rotating twin-screw extruders, as well as the difficulty of research and development.
In the feeding section and devolatilization section, it is very necessary for the screw element to have a large free volume. For bulk materials, increasing the free volume of the feeding section and the filling of the material in the screw groove can greatly improve the production of the twin-screw extruder ability.
To increase the torque and speed, the deceleration distribution box needs to be carefully designed. To greatly improve the torque index of the equipment, higher requirements will be put forward on the design and manufacturing level of the transmission box.
The higher the torque, the higher the requirements for the design, manufacturing accuracy, material strength and heat treatment of gears, output shafts, bearings, and other transmission box parts. At the same time, the design and manufacturing precision requirements of the screw core shaft, threaded elements and kneading discs are also higher. Because of the need to increase the free volume of the threaded element, the center distance between the two screws will be reduced. When the outer diameter of the screw of the twin-screw extruder remains unchanged, making the problem of insufficient installation space for the proportioning gear and thrust bearing is even more serious.
The production efficiency of the dual screw extruder is one of the important goals of the development of the new co-rotating dual screw extruder, which can be achieved by increasing the screw speed, enhancing the plasticizing and mixing capabilities, etc. Under the same screw speed, increasing the depth of the screw groove can greatly increase the conveying capacity.
Correspondingly, the requirements on the plasticizing and mixing capabilities of the dual screw extruder screw have also increased, and the screw must withstand greater torque.
Under the high screw speed of the dual screw extruder, the residence time of the material in the dual screw extruder is reduced, which may cause the material to be plasticized, melted, mixed, and insufficient. For this reason, it is necessary to increase the screw length appropriately. These will inevitably lead to an increase in the actual torque and power of the dual screw extruder.
KY is currently the largest manufacturer of parallel co-rotating twin-screw extruders in China and Asia, with 250-450 units annual output. Leah has installed more than 8,000 extruder systems worldwide, covering the chemical, plastics, textile, food and pharmaceutical industries. If you have any needs, please feel free to consult us.
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