The last thread of the material mouth starts to call the material of the conveying section where it cannot be plasticized, but it must be preheated, pressed and crushed. In the past, the old extrusion theory considered that the material was loose, and later proved that the material was actually a solid material. The plug, which means that the material is squeezed after this is a solid plug, so as long as the delivery task is its function.
Single-screw extruder principle: When the second section is called the compression section, the volume of the screw groove gradually becomes smaller, and the temperature must reach the plasticization degree of the material. Here, the compression is generated by the conveying section III, where it is compressed to one, which is called the screw. The compression ratio - 3:1, some machines have also changed, and the plasticized material entered the third paragraph.
Single-screw extruder principle: The third section is the measurement section where the material maintains the plasticizing temperature, just as the metering pump is accurate, quantitatively conveying the melt material to supply the head, at this time the temperature can not be lower than the plasticizing temperature, generally Slightly higher.
Single-screw extruder is mainly used for extruding thermoplastics such as soft and hard polyvinyl chloride, polyethylene, etc. It cooperates with corresponding auxiliary machines (including molding heads) to process a variety of plastic products such as film and tube. Plates, ribbons, etc. can also be used for granulation.
Plastic extruder has advanced design, high quality, good plasticization, low energy consumption, involute gear transmission, low noise, stable operation, large bearing capacity, long service life and so on.