The extruder screw is the core component of the extrusion system, responsible for solid plastic transportation, melt plasticization, melt homogenization pressurization, and quantitative extrusion functions. Its performance directly determines production efficiency and product quality.

　Structural design elements:

　1​​. Segmented functional structure

Feeding section: deep spiral groove design, large lead thread enhances powder/recycled material conveying capacity

Compression section: Gradual spiral groove depth variation, achieving mild plasticization of materials

Measurement section: shallow groove structure combined with barrier threads to establish stable extrusion pressure

2. Key geometric parameters

Length to diameter ratio (L/D): 18:1-40:1 (the larger the length to diameter ratio, the more complete the plasticization)

Spiral edge clearance: 0.1-0.3mm (affecting reflux leakage and self-cleaning ability)

Shear element: Pin mixing section and other reinforced dispersed mixing components

The maintenance of extruder screws is crucial to ensure efficient operation and extend the service life of the equipment. The following are the key steps for maintenance and upkeep:

　　1. regular cleaning

　　Cleaning after shutdownAfter each shutdown, promptly clean the residual materials inside the screw and barrel to prevent carbonization or corrosion of the materials.

　　Use cleaning materialsRegularly use specialized cleaning materials to remove carbon deposits and residues from the screw and barrel.

　　2. Check for wear and tear

　　regular inspectionRegularly check the wear of screws and barrels, especially the threads and inner walls of barrels.

　　measurement gapUse measuring tools to check the gap between the screw and the barrel. If there is excessive wear, it should be replaced in a timely manner.

　　3. Lubrication and maintenance

　　Bearing lubricationRegularly lubricate the bearings at the screw drive end to ensure their normal operation.

　　Use appropriate lubricantsChoose lubricants suitable for high temperature and high pressure environments.

　　4. temperature control

　　monitor temperatureRegularly check the heating and cooling system to ensure accurate temperature control.

　　Avoid overheatingTo prevent damage to the screw and barrel due to overheating.

　　5. Prevent corrosion

　　Choose corrosion-resistant materialsWhen processing corrosive materials, choose corrosion-resistant screw and barrel materials.

　　Clean up promptlyImmediately clean up corrosive materials after shutdown to avoid prolonged retention.

　　6. periodic calibration

　　Calibrate the sensorRegularly calibrate temperature and pressure sensors to ensure accurate data.

　　Check the drive systemRegularly inspect the motor and gearbox to ensure their normal operation.

　　7. Record maintenance

　　Maintenance RecordRecord in detail the time, content, and issues discovered during each maintenance.

　　analysis recordBy analyzing records, potential problems can be identified in advance and measures taken.

　　8. Train operators

　　Operation TrainingRegularly train operators to ensure they master the correct operation and maintenance skills.

　　safety trainingStrengthen safety training to prevent accidents caused by improper operation.

　　9. Spare Parts Management

　　spare partsReserve commonly used spare parts such as screws, bearings, seals, etc. for timely replacement.

　　Use original spare partsTry to use original spare parts to ensure compatibility and reliability.

　　10. Regular major repairs

　　Planned major overhaulRegularly conduct major repairs and comprehensively inspect the equipment status based on usage.

　　Replace worn partsReplace severely worn components during major repairs to restore equipment performance.