1. During the extrusion production process, because the process temperature is too low or the extruder barrel is mixed with metal foreign matter with the material, the working torque of the extruder screw will suddenly increase, and this torque force exceeds the strength limit of the screw, causing the screw to twist off.
2. If there are fillers such as calcium carbonate or glass fiber in the material, 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 the abrasion of the screw and barrel. The inner diameter of the barrel will gradually increase and the outer diameter of the screw will gradually decrease. 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, and frequent decomposition of extruded materials, such as PVC decomposition will release a large amount of HCI gas, which intensifies the corrosion of extruder spare parts.
5. The heat treatment hardness of the working surface of the extruder screw or extruder barrel does not reach the required value, which will accelerate the wear of the two parts.
6. Improper selection of materials for the extruder screw and extruder barrel makes the working strength of the two parts insufficient and shortens their working life.
Barrel with vent openings enabling efficient removal of volatiles under controlled partial fill and pressure conditions.
Best suited for:
Devolatilization
Moisture removal
Vacuum venting sections
Single flight conveying elements provide higher conveying efficiency than standard double flight elements. Their wider flight design reduces leakage flow and increases pressure-building capability.
Best suited for:
Feeding sections
Extrusion zones
Applications requiring strong conveying force
Double flight conveying elements are the most widely used design in twin screw compounding. They provide the best balance between free volume and torque transmission.
Best suited for:
Feeding sections
Venting zones
Pressure control sections
Robust rectangular spline design providing stable torque transmission with moderate load capacity.
Best suited for:
Medium torque systems
Chemical processing
Replacement applications
Cold-Forming high-torque shaft with improved strength and fatigue resistance for demanding extrusion conditions.
Best suited for:
High torque extrusion systems
High filler compounding
Continuous high-load production
TME elements use intermeshing toothed discs to split and recombine melt flow, achieving efficient distributive mixing without conveying.
Best suited for:
Melt mixing zones
Fiber-reinforced materials
High homogeneity requirements
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