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Basic structure of twin-screw extruder screw

by:TENGDA     2023-01-24

Do you know what the basic structure of the twin-screw extruder is? How many sections are the screws of the general twin-screw extruder? What is the function of each section? What is the effect of this classification of the screw? The basic structure of the screw of the screw extruder.

The screw of the twin-screw extruder is the key component of the extrusion system of the hose production line, and is called the 'heart' of the extruder. Its structure is very important. What are the specific classification functions? The screw is composed of a screw mandrel, a screw edge, and a screw groove. The working temperature of the screw is usually divided into the following three sections:

(1) Feeding section. The main function is to gradually compact the loose material and send it to the next section, reducing the fluctuation of pressure and output, so as to transport the material stably, and the second is to preheat the material.

(2) Melting section. Its function is to further compact the material, push the air in the material to the feeding section and discharge it, so that the material is completely melted and sent to the next section. Also known as compression.

(3) Homogenization section. The function is to further uniformly plasticize the melted material, and make it constant temperature, constant pressure, quantitative and continuous extrusion into the machine head. Also known as metering section.

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