1、 Daily inspection and cleaning

1. Body and component inspection
   • Visual inspectionBefore each startup, check the machine body for cracks, deformations, or looseness, especially key components such as the cutting blade, die head, and screw. If any abnormalities are found, the machine should be stopped immediately for maintenance.
   • Fastener inspectionRegularly check whether bolts, nuts, and other fasteners are loose to prevent parts from falling off or being damaged due to vibration during equipment operation.
2. Cleaning work
   • Residual material cleaningAfter each production is completed, promptly clean the residual materials inside the granulator to prevent material clumping or deterioration from affecting the next production.
   • Mold cleaningRegularly disassemble the mold head and use specialized tools to clean the residual plastic in the mold hole to prevent blockage. For stubborn stains, a soft scraper or solvent can be used for cleaning.
   • Cooling system cleaningCheck whether the cooling water circuit is unobstructed, regularly clean the scale and impurities, and ensure good cooling effect.

2、 Lubrication and maintenance

1. Lubrication of transmission components
   • Bearing lubricationRegularly add lubricating grease to the bearings, usually every 200-500 hours of operation. Choose lubricating grease suitable for high-speed operation and high-temperature environments, such as lithium based grease.
   • gear lubricationFor gear transmission components, regularly check the gear oil level and promptly replenish or replace the gear oil. Gear oil should have good anti-wear and anti-oxidation properties.
2. Screw and barrel lubrication
   • Lubricating grease applicationRegularly apply high-temperature resistant grease to the mating area between the screw and the barrel to reduce friction and wear.
   • lubrication intervalLubricate and maintain the equipment every 500-1000 hours of operation based on its frequency of use.

3、 Particle cutting system maintenance

1. Inspection and replacement of pellet cutter
   • Blade wear inspectionRegularly check the wear of the pellet cutter, and replace it promptly if the blade becomes dull or has a notch. Blade wear can affect the quality and efficiency of grain cutting.
   • Blade clearance adjustmentAdjust the gap between the cutting blade and the die head according to the material and thickness of the film to ensure uniform cutting. Excessive gap may cause particles to be too long, while insufficient gap may damage the blade.
2. Cleaning of the cutting chamber
   • Residual particle cleaningAfter each production is completed, clean the residual particles in the cutting chamber to prevent particle accumulation from affecting equipment operation.
   • Seal inspectionCheck if the sealing components of the cutting chamber are intact to prevent plastic particle leakage.

4、 Electrical system maintenance

1. Motor inspection
   • Temperature and vibration monitoringRegularly check the operating temperature and vibration of the motor. If the temperature is too high or the vibration is abnormal, stop the machine for inspection.
   • Insulation performance testingRegularly check the insulation resistance of the motor using a megohmmeter to ensure good insulation performance and prevent leakage accidents.
2. Electrical component inspection
   • Contactors and relaysCheck whether the contacts of the contactor and relay are in good contact and whether there is any burning phenomenon. Poor contact of the contacts can cause the device to fail to start properly or operate unstably.
   • Line inspectionCheck whether the electrical circuit is damaged, aged or loose, and repair or replace the circuit in a timely manner.

5、 Regular maintenance and calibration

1. Screw and barrel maintenance
   • Gap calibrationRegularly check the gap between the screw and the barrel. If the gap is too large, adjust or replace the components. Excessive gaps can lead to uneven plasticization of materials.
   • surface inspectionCheck the surface of the screw and barrel for scratches or wear. If the wear is severe, repair or replacement is necessary.
2. Temperature control system calibration
   • Temperature sensor calibrationRegularly calibrate the temperature sensor to ensure accurate temperature display. Temperature deviation can affect the plasticizing effect of plastics.
   • Heating element inspectionCheck if the heating element is working properly, if there is any damage or aging, and replace the faulty element in a timely manner.

6、 Safety protection and operating standards

1. Safety device inspection
   • Emergency stop buttonRegularly test the function of the emergency stop button to ensure that the equipment can quickly stop running in emergency situations.
   • Protective cover inspectionCheck if the protective cover of the equipment is intact to prevent operators from coming into contact with rotating parts.
2. Operating Specifications
   • Train operatorsEnsure that operators are familiar with the operating procedures and maintenance points of the equipment to avoid equipment damage or safety accidents caused by improper operation.
   • Record maintenance statusEstablish equipment maintenance records, recording the time, content, and replaced parts of each maintenance to facilitate tracking of equipment operation status.

7、 Long term shutdown maintenance

1. rust prevention treatment
   • Apply anti rust oil to metal partsIf the equipment needs to be stopped for a long time, apply rust proof oil to the metal parts to prevent rusting.
   • Coverage protectionCover the equipment with plastic film or dust cover to prevent dust and moisture from entering the interior of the equipment.
2. Regularly start
   • Prevent components from getting stuckEquipment that has been out of use for a long time should be restarted at regular intervals (such as one month) to allow the equipment to run without load for a period of time, in order to prevent components such as bearings and gears from rusting or getting stuck due to long-term inactivity.

8、 Common faults and their solutions