TENGDA Is a Professional Plastic Extruder Machine Manufacturers in China.

Working principle of plastic granulator

by:TENGDA     2022-12-30
Plastic granulator is now suitable for various plastic processing occasions, and there are many types of plastics, such as PP, PE, PS, ABS, PA, PVC, PC, POM, EVA, LCP, PET, PMMA, etc., which can realize Reproduction and granulation of various plastics. So, what is the working principle of the plastic granulator? as follows:
After the plastic enters the screw through the hopper, the screw works, and then the material particles are discharged through mutual extrusion between the inner wall of the barrel and the surface of the screw. At the feeding stage of the equipment, scattered solid plastic particles will be in the screw barrel. , with the rotation of the screw, the material is extruded. Because the material is compressed, under the action of extrusion and pressure resistance, the pressure of the material is reduced and compacted.
At the same time, under the action of the external heating of the barrel and the internal friction and shear heat generated by the screw extrusion stirring, mixing and shearing friction, the temperature of the plastic continues to rise, and at a certain point in contact with the barrel, the inside of the material When the temperature reaches the melting point, the material begins to melt. As the material is conveyed and continues to be heated, the amount of molten material will gradually increase, while the volume of unmelted material will decrease accordingly. At the end of the compression stage, the extruded materials inside are transformed into a viscous flow state. At this time, the temperature of the internal materials is the same, and the pellets in each stage are uniform. The final screw drives the molten material quantitatively, at a constant pressure and at a constant temperature. Squeeze into the nose. The die in the machine head is a forming part, through which the material obtains the geometric shape and size of the section, and then after cooling and shaping and multiple processes, the formed plastic masterbatch can be obtained.

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