Explanation of extruder screw barrel segments

Extruder screw barrel in general can be divided into charging section, compression section, homogenization section (also known as metering section). (Note: different screws accounted for the ratio of the three sections is not the same, the screw groove depth is not the same, the bottom diameter of the screw transition form is not the same).

1、Feeding section description: the depth of this section of the screw groove is fixed, its function is responsible for preheating and plastic solids transportation and extrusion. It must be ensured that the plastic begins to melt at the end of the feeding section.

2, compression section description: this section for the gradual shrinkage of the screw screw groove depth, its function is to melt the plastic material, mixing, shear compression and pressurized exhaust. Plastic in this section will be completely dissolved, the volume will be reduced, the design of the compression ratio is very important.

3, homogenization section description: this section for the screw screw groove fixed groove depth, its main function for the mixing, molten rubber delivery, measurement, but also must provide sufficient pressure to maintain uniform temperature of molten rubber and stabilize the flow of molten plastic.

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