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Working principle of plastic granulator

Author: Powerful Plastic Machinery Time:2022-10-13 15:11:07 Read:409

The plastic granulator is suitable for the regeneration and color mixing granulation of PP, PE, PS, ABS, PA, PVC, PC, POM, EVA, LCP, PET, PMMA and other plastics.

Working principle of plastic granulator. When the material enters the compression section, due to the gradual shallowing of the screw groove depth and the resistance of the head, the plastic gradually forms a high pressure and is further compacted. At the same time, under the action of the external heating of the barrel and the internal friction shear heat generated by the strong stirring, mixing and shear friction between the screw and the inner surface of the barrel, the plastic temperature keeps rising. At a point where the barrel contacts, the plastic temperature reaches the melting point and begins to melt. As the plastic granulator continues to heat with the delivery of materials, the amount of molten materials increases gradually, while the amount of unmelted materials decreases correspondingly. At about the end of the compression section, all the materials change into viscous flow state, but the temperature at each point is not uniform at this time, and the homogenization effect in the homogenizing section is relatively uniform, and then the screw extrudes the molten materials into the die head at a fixed quantity, pressure and temperature. The middle die of the head is a forming part, through which the material can obtain the geometric shape and size of the cross section, and then through cooling, shaping and other processes, the formed products can be obtained.

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