What is the difference between single screw and twin screw extrusion granulator?
The screw length of the twin-screw granulator is short, so the material stays in the twin-screw granulator for a short time, which can avoid thermal degradation of the recycled fiber and reduce power consumption. The material conveying efficiency of a single screw depends on the friction properties of the solid material and the viscosity of the melt. In the twin-screw extruder, the conveying of the material is carried out by the principle of positive displacement, and there will be no pressure backflow. Therefore, the material is easier to add than a single screw extruder.
The twin-screw granulator has excellent venting and self-cleaning functions. The flow rate of the twin-screw pelletizing extruder is not sensitive to the die pressure, and it is more effective for extruding products of large size and area. The flow rate of the single screw granulator is more sensitive to the die pressure. The plastic material is sheared and mixed vertically and horizontally, and has excellent homogenization and plasticizing effect. Twin-screw granulator is mainly used for filling, blending, modifying, increasing, chlorinating, polypropylene and super absorbent resins of rubber, plastics and engineering resins; degradable masterbatch, polyamide polycondensation, polyurethane adding Polymer extrusion, small models are mainly used for scientific research and teaching.
The main barrel of the single-screw granulator is heated by electricity, and the temperature of the barrel is automatically controlled by water cooling. The screw core can be cooled by water (oil) to control the screw temperature. The machine head is equipped with a pressure sensor for testing the melting temperature and pressure. The air-cooled die surface is eagerly cut, the auxiliary machine for granulation, and the rotating blade are driven by an AC motor, and the speed is adjusted by frequency conversion;
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