Extrusion Theory of Single Screw Extruder
The screw of single screw extruder is generally divided into three sections, according to screw diameter, screw pitch, and screw depth to determine the effective length of the three sections, each by one-third of the general division.
The first section is called conveyor section: materials in the plastics can not be here, but the process of being warm-up, and squeezed is needed. The traditional theory holds that the material here is a loose body, but by proving the actual material is here solid plug, that is to say here, after the materials by extrusion of a solid as the same plug. Therefore, the transfer is its function.
Compression is called the second section. The spiral groove volume gradually becomes smaller, and the temperature of plastic materials needs to achieve the degree of compression.Some single screw extruders also have changes in the completion of plastics material into the third.
Compression is called the second section. The spiral groove volume gradually becomes smaller, and the temperature of plastic materials needs to achieve the degree of compression. Some machines also have changes in the completion of plastics material into the third.
Measurement of the third section is here to keep plastic materials, temperature, metering pump as accurate as quantitative transport materials melt to supply the head of single screw extruder, when the temperature is not lower than the plasticizing temperature, in general, slightly higher point.
The first section is called conveyor section: materials in the plastics can not be here, but the process of being warm-up, and squeezed is needed. The traditional theory holds that the material here is a loose body, but by proving the actual material is here solid plug, that is to say here, after the materials by extrusion of a solid as the same plug. Therefore, the transfer is its function.
Compression is called the second section. The spiral groove volume gradually becomes smaller, and the temperature of plastic materials needs to achieve the degree of compression.Some single screw extruders also have changes in the completion of plastics material into the third.
Compression is called the second section. The spiral groove volume gradually becomes smaller, and the temperature of plastic materials needs to achieve the degree of compression. Some machines also have changes in the completion of plastics material into the third.
Measurement of the third section is here to keep plastic materials, temperature, metering pump as accurate as quantitative transport materials melt to supply the head of single screw extruder, when the temperature is not lower than the plasticizing temperature, in general, slightly higher point.
