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Introduction of single screw granulator

by:TENGDA     2022-11-12

(1) Screw:

(2) Barrel: It is a metal cylinder, generally made of alloy steel with heat resistance, high compressive strength, strong wear resistance and corrosion resistance or composite steel pipe lined with alloy steel. The barrel cooperates with the screw to realize the pulverization, softening, melting, plasticizing, exhausting and compacting of the plastic, and continuously and uniformly convey the rubber material to the molding system. Generally, the length of the barrel is 15 to 30 times its diameter, so that the plastic can be fully heated and fully plasticized.

(3) Hopper: The bottom of the hopper is equipped with a cutting device to adjust and cut off the material flow, and the side of the hopper is equipped with a sight hole and a calibration metering device.

(4) Machine head and mold: The machine head is composed of an alloy steel inner sleeve and a carbon steel outer sleeve. The machine head is equipped with a forming mold. The function of the machine head is to convert the rotating plastic melt into parallel linear motion, uniform and stable. Introduce into the mold sleeve and impart the necessary molding pressure to the plastic. The plastic is plasticized and compacted in the barrel, and the porous filter plate flows into the molding die of the die through the neck of the die along a certain flow channel. A continuous and dense tubular cladding layer is formed around the core wire. In order to ensure a reasonable plastic flow channel in the machine head and eliminate the dead angle of accumulated plastic, a shunt sleeve is often installed. In order to eliminate the pressure fluctuation during plastic extrusion, a pressure equalizing ring is also installed.

(5) The barrel of the main machine 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; Single screw granulator




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