The section description of extruder screw barrel is described

The extruder screw can be divided into the feeding section, the compression section and the homogenization section (also known as the metering section). (note: the ratio of the three segments of the screw is different, the screw groove is different, and the diameter of the screw is different.)

1. Description of the feeding section: this segment of spiral groove is fixed in depth, and its function is to be responsible for preheating and plastic solid conveying and pushing. It is necessary to ensure that the plastic begins to melt at the end of the feeding segment.

2. Description of compression section: this section is a tapered screw hole tooth depth, its function is plastic material melting, mixing, shear compression and pressure exhaust. The plastic will dissolve completely in this segment, the volume will shrink, and the design of the compression ratio is important.

3, homogenization section: this section for screw fixed screw groove groove depth, its main function is mixed, melt conveying, metering, must also provide enough pressure, maintain stability of the melt temperature and the flow of the molten plastic.