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Learn about the cooling device and transmission device of the twin-screw extruder!

by:TENGDA     2022-12-19
Key words: twin screw extruder

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I believe that everyone is familiar with twin-screw extruders. In the previous article, TENGDA Plastic Extruder Machine Manufacturers has introduced a lot of information about this equipment, but there is no detailed information about some specific components of this equipment. Said, for example, its cooling device and transmission device, these two devices are relatively important components of the twin-screw extruder, the cooling device ensures that the machine equipment maintains a good temperature during use, and there will be no machine failure. When the temperature is too high, the transmission device is to ensure that the material can be transported to the machine stably. Maybe TENGDA Plastic Extruder Machine Manufacturers is not very clear about this introduction, so TENGDA Plastic Extruder Machine Manufacturers will give you a detailed understanding of the following content.

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Cooling device for twin-screw extruder:

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The cooling method of the barrel of the twin-screw extruder can be air-cooled or water-cooled. The air-cooled method is to use an electric fan to blow the part of the barrel that needs to be cooled, and let the cold air take away part of the heat of the barrel to achieve the purpose of cooling the barrel.

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The characteristic of the air-cooled machine barrel is that the cooling speed of the machine barrel is slow. The barrel is cooled by circulating water to cool down quickly, but it is easy to scale and block after long-term use. Therefore, if you want to use water cooling, you should use treated softened water.​

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The twin-screw extruder adopts a utility model cooling device, which can effectively control the temperature of the barrel and provide a reliable guarantee for the normal operation of the equipment.

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The cooling device of the twin-screw extruder includes a jacket installed on the outer wall of the cylinder of the twin-screw extruder. The jacket is provided with a water inlet and a water outlet. A heat exchange pool, a water inlet and a water outlet are arranged under the cylinder. The pipes are respectively connected with the heat exchange pool, the heat exchange pool is connected with the cooling water tower, and the pipes are also provided with cooling fins.

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The advantage is that it adopts heat conduction oil circulation cooling, the noise is very small, and its cooling capacity can also meet the requirements of large extruders, and it will not cause rapid cooling, and will not disturb the stable flow of plastics. Water cooling is also easy to generate scale to block pipes.

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Transmission of twin-screw extruder:

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Twin-screw extruder is mainly composed of screw, barrel, machine head, feeding mechanism, transmission device and temperature control system, etc. The length-to-diameter ratio of cold-feed extruder screw is generally 8-18, and the extruded products are of good quality , does not need to be equipped with a heat mixer, the hot-feed screw extruder must be fed with heat-refined rubber, and the rubber is further plasticized through screw extrusion, shearing and stirring, etc. SZ92 conical twin-screw extrusion machine transmission plant, and by n-type continuous extrusion.

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It is mainly composed of screw, barrel, machine head, feeding mechanism and transmission device. The screw aspect ratio of hot feed extruder is generally 4—6. The quality of the extruded product can meet the process requirements, and it needs to be equipped with a heat mixer.

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The auxiliary equipment of the twin-screw extruder mainly includes a pay-off device, a straightening device, a preheating device, a cooling device, a traction device, a meter counter, a spark tester, and a wire take-up device. The use of the extrusion unit is different, and the auxiliary equipment used for matching is also different, such as blow dryers, cutters, printing devices, etc.

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The twin-screw extruder is mainly composed of three parts: gear transmission system, electrical control, barrel and screw. Considering the continuous and stable characteristics of the extruder, the importance of the processing requirements and assembly requirements of these three parts is obvious. The gear transmission system includes a gearbox and a distribution box. Mainly to ensure the raw materials, processing accuracy and assembly accuracy of its accessories.

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Improper design of twin-screw plastic granulation hopper: The correct hopper design is the key to ensure the stable transportation of materials. Generally speaking, new pellets of uniform size work well in square hoppers with abrupt constriction zones.

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The above is the relevant content about the cooling device and transmission device of the twin-screw extruder introduced by TENGDA Plastic Extruder Machine Manufacturers. It mainly introduces these two devices in detail. If you are interested, you can learn more about other products. Structure and composition.
Application are all following the most compatible manufacturing regulations.
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