1. During the extrusion process, because the process temperature is too low or the extruder Screw Barrel is mixed with metal foreign matter and the material is mixed, the working torque of the extruder screw will suddenly increase, and this torque force exceeds the strength limit of the screw. . Screws, causing the screws to break off.

2. If the material contains fillers such as calcium carbonate or glass fiber, it will increase the abrasion of the extruder screw and extruder barrel.

3. The extruder screw rotates in the extruder barrel to extrude the material. The long-term friction between the screw, barrel and the material will inevitably cause wear of the screw and barrel. The inner diameter of the barrel gradually increases, and the outer diameter of the screw gradually decreases. In this way, the gap between the screw and the barrel will increase as the two gradually wear.

4. Improper operation, unstable process temperature control, frequent decomposition of extruded materials, such as decomposition of PVC will release a large amount of HCl gas, aggravate the corrosion of the extruder spare parts.

5. The heat treatment hardness of the working surface of the extruder screw or extruder barrel cannot reach the required value, which will accelerate the wear of the two parts.

6. The improper selection of materials for the extruder screw and extruder barrel makes the working strength of the two parts insufficient and shortens their service life.