Brief introduction of plastic granulator equipment and screw characteristics

Brief introduction of plastic machinery single screw, the ratio of effective working length to the diameter of the single screw of plastic pellet machine is called aspect ratio. Under the condition that the single screw speed is constant, the aspect ratio increases, which means that the movement time of the material in the single screw of the plastic pellet machine increases, which is beneficial to the plasticization and mixing of the plastic, and can be the relaxation of the heating process; When the diameter ratio is increased, the red equalization length is increased correspondingly, and the plastic granulator can reduce the countercurrent flow rate and the leakage flow rate, which is equivalent to increasing the production capacity.

Ordinary extruder single screw can be divided into three sections of different structure, which are heating section, compression section, and metering section. Their main functions are as follows: feeding section - solid conveying of polymer materials. Compressed section—Compresses the material and melts the material. Metering section—mixing and mixing the molten material (and thus the homogenization section) and delivering the melt to the die at a constant pressure.

       The noise generated by the single screw of the plastic granulator in rotating the extruded material, the plastic granule machine is mainly the sound generated when the single screw rotates and rubs against the inner wall of the barrel. There are several reasons for the phenomenon of friction between the barrel and the single screw. The single screw is assembled in the barrel, and the concentric error of the two parts is large. The perpendicularity of the end face of the barrel and the end face of the machine and the center line of the machine can be guaranteed with a large error. Single screw bending deformation, the straightness error of the shaft centerline is too large. The assembly clearance between the single screw and its supporting drive shaft is too large. When the rotary operation is performed, the two axes are not concentric, and the error is too large.