1、 Preparation before operation

1. Equipment inspection
   • mechanical partsCheck whether the blade is sharp, without cracks or severe wear, whether the screen is intact and undamaged, and whether the tension of the drive belt is appropriate (too loose can cause slipping, too tight can cause breakage).
   • Electrical systemConfirm that the power supply voltage is consistent with the rated voltage of the equipment, check whether the wiring of the motor and control cabinet is secure, and avoid the risk of short circuit or leakage.
   • safety deviceVerify that the emergency stop button, protective cover, and safety interlock device (such as the feed inlet protective door) are functioning properly to ensure that the equipment can be immediately shut down in case of any abnormalities.
   • lubrication systemAdd lubricating oil or grease to moving parts such as bearings and gears to reduce wear and noise.
2. Material preparation
   • preprocessingRemove hard impurities such as metal, stones, wood, etc. from the plastic to be crushed to avoid damaging the blades or mesh.
   • size controlLarge pieces of plastic need to be pre cut or crushed to the maximum size allowed at the feed inlet to prevent overload.
   • Material ClassificationMixing and crushing plastics of different materials (such as PP, PE, PVC) may affect product quality, and it is recommended to classify them according to their materials.
3. environment check
   • Ensure that there are no flammable or explosive materials around the equipment, good ventilation, and avoid the risk of fire or explosion caused by dust accumulation.
   • Check if the ground is level to prevent equipment from tipping over due to vibration during operation.

2、 Monitoring during operation

1. parameter control
   • feeding speedUniform feeding to avoid overloading the motor or blocking the crushing chamber due to excessive material input at once.
   • Speed regulationAdjust the blade speed (usually 500-3000rpm) according to the requirements of plastic material and particle size. Hard plastics require a lower speed, while soft plastics can increase the speed appropriately.
   • Temperature monitoringLong term operation may cause equipment temperature to rise. It is necessary to regularly check the temperature of the motor and bearings (generally not exceeding 70 ℃) to prevent overheating and damage.
2. Abnormal sounds and vibrations
   • If there is abnormal noise or severe vibration during operation, immediately stop the machine for inspection. It may be due to loose blades, damaged screens, or damaged bearings.
   • Observe whether the particle size of the discharge is uniform. If there is uneven thickness or excessive powder, adjust the blade gap or replace the sieve.
3. safety protection
   • Do not open the protective cover or reach into the crushing chamber while the device is running, and avoid contact with the rotating blades.
   • Operators are required to wear protective goggles, dust masks, and earplugs to prevent plastic debris splashing, dust inhalation, or noise injuries.

3、 Safety protection measures

1. Electrical safety
   • The equipment is well grounded to prevent electric leakage and shock; Regularly check the insulation performance of the motor to ensure compliance with safety standards.
   • Avoid using equipment in humid environments to prevent electrical components from short circuiting.
2. Mechanical safety
   • Rotating components such as blades and transmission shafts must be equipped with protective covers, which must be firm and reliable.
   • The design of the feeding port should prevent fingers or tools from accidentally entering, and a feeding rod can be used to assist with feeding.
3. Fire and explosion prevention
   • When crushing flammable plastics such as PVC and ABS, a fire extinguisher should be equipped and there should be no open flames around the equipment.
   • Regularly clean the dust inside the equipment to prevent dust explosions.

4、 Key points of maintenance and upkeep

1. routine maintenance
   • cleanClean up the residual plastic inside the equipment after daily work to prevent the material from hardening and blocking the blades or screens.
   • lubricationRegularly add lubricating oil to moving parts such as bearings and gears to reduce wear.
   • fastenCheck if bolts, nuts, and other fasteners are loose, especially the fixing of blades, screens, and transmission components.
2. regular maintenance
   • Blade replacementRegularly replace blades based on wear and tear to ensure cutting efficiency; When replacing, adjust the blade clearance to the specified value (usually 0.5-2mm).
   • Screen replacementDamaged or clogged screens can affect the particle size of the discharged material and require regular cleaning or replacement.
   • Transmission system inspectionCheck the wear of the belt and chain, adjust the tension; Check the lubrication status of gears and bearings, and replace the lubricating oil if necessary.
3. Long term shutdown maintenance
   • When the equipment is not in use for a long time, it is necessary to clean the residual materials inside, apply anti rust oil to protect the metal parts, and cover them with dust covers.
   • Regularly start the equipment to idle for a period of time to prevent parts from rusting or getting stuck.