1. Main motor system malfunction：
   • Excessive or insufficient torqueUnstable torque of the main motor can affect the normal operation of the granulator.
   • Low speedInsufficient speed of the main motor may lead to a decrease in production efficiency.
   • The bearing temperature is too highOverheating of bearings may damage the motor or affect operational stability.
   • The winding temperature is too highOverheating of motor windings may cause malfunctions or damage.
   • Cooling system issueIf the temperature at the inlet and outlet of the cooler is too high or the water leakage is too high, it will affect the cooling effect.
   • Lubricating oil issueThe outlet flow or pressure of the bearing lubrication oil pump is too low, which affects the lubrication effect.
2. Transmission system malfunction：
   • Deviation of gear lever positionIncorrect position of the gearbox gear lever may affect transmission efficiency.
   • Friction clutch issueIf the instrument air pressure is too high, the speed difference is too large, or there is an internal malfunction, it may cause the clutch to disengage or wear out.
   • Lubricating oil issueThe outlet pressure of the gearbox lubricating oil pump is too low or the oil temperature is too high, which affects lubrication and transmission.
3. Screw process section malfunction：
   • Excessive melt pressureExcessive melt pressure before and after the throttle valve or at the machine head may affect the extrusion effect.
   • Network changer issueExcessive pressure difference between the melt before and after the screen changer may cause blockage or poor flow.
   • Driving valve malfunctionThe malfunction of the driving valve rotation may affect the start-up and operation of the granulator.
4. Underwater cutting system malfunction：
   • Motor issuesHigh winding temperature or motor failure of the pelletizing motor may affect the pelletizing effect.
   • Speed and torque issuesLow speed or high torque of the pelletizer may cause uneven pelletizing.
   • Particle water problemAutomatic switching failure of granular water bypass, high or low pressure, and low flow rate may affect the cooling effect.
   • Clamping problemFailure to tighten the clamping bolts of the pelletizer or low hydraulic clamping pressure may result in unstable pelletizing.
   • Cutting knife issuePoor sharpness of the cutting blade, rough edges, or foreign objects on the surface may result in the production of abnormal particles.
5. Feed issue：
   • Uneven feedingFeeding system issues or improper manual operation may result in uneven feeding, affecting particle quality.
   • Inlet blockageBlockage of the feed inlet or interruption of the hopper may result in unbalanced feeding.
6. pressure fluctuation：
   • Unstable pressure inside the equipmentSystem failures such as feeding, pushing, squeezing, and cutting may cause pressure fluctuations.
   • parameter variationChanges in parameters such as moisture content, temperature, and composition of particles may cause pressure fluctuations, affecting particle shape and quality.
7. Temperature too high：
   • improper adjustmentImproper operation or equipment malfunction may result in excessive temperature.
   • Squeezing is not smoothPoor squeezing of the equipment may lead to increased friction, which in turn can cause excessive temperature.
8. Operation and maintenance issues：
   • Improper operationFailure to follow the operating procedures may result in equipment damage or malfunction.
   • Lack of timely maintenanceFailure to regularly clean and maintain equipment may result in decreased performance or frequent malfunctions.

To address the above issues, it is recommended to take the following measures:

• Regular inspection and maintenanceRegularly inspect and maintain the water-cooled granulator to ensure the normal operation of all components.
• Timely replacement of vulnerable partsFor severely worn components such as cutters, bearings, etc., they should be replaced in a timely manner.
• Optimize operational parametersOptimize operating parameters based on production requirements and equipment performance to ensure efficient and stable operation of the equipment.
• strengthen trainingTrain operators to improve their operational skills and maintenance awareness.