1、 Equipment operation specifications

1. Pre-start inspection
   • Clean up foreign objectsCheck whether there are residual materials or metal impurities in the inner ring, hopper, screw and other parts of the granulator to avoid jamming or damaging the equipment.
   • Tightening componentsCheck if all screws and transmission components are loose, manually rotate the equipment to confirm there are no abnormalities.
   • Electrical systemConfirm that the motor power supply, heating element, and control circuit are normal to avoid short circuits or leakage.
2. Preheating and warming up
   • Segmented temperature controlSet the temperature of the material cylinder and mold head according to the material of the plastic bottle (such as PET, PE, PP). For example, PET needs to be preheated to 220-260 ℃, and PE needs to be preheated to 160-200 ℃.
   • uniform heatingPreheating time is about 40-60 minutes to ensure uniform temperature distribution and avoid material degradation caused by local overheating.
3. Feed control
   • Slowly add ingredientsAfter the equipment reaches the predetermined temperature, slowly add cleaned plastic fragments to the hopper to avoid blockage or overload.
   • Uniform feedingUse a forced feeder to ensure that the material enters the screw continuously and evenly, preventing material breakage or accumulation.
4. operation monitoring
   • Observe parametersPay close attention to parameters such as extrusion pressure, screw speed, and motor current, and immediately stop the machine for inspection in case of abnormalities.
   • particle massCheck whether the particles cut by the granulator are uniform, free of continuous particles or burrs, and adjust the cutting speed or mold hole gap in a timely manner.

2、 Raw material pretreatment

1. Classification and Cleaning
   • Material ClassificationClassify and recycle according to plastic types (PET, PE, PP, etc.) to avoid performance degradation caused by mixing different materials.
   • remove impuritiesWhen cleaning plastic bottles, remove impurities such as labels, bottle caps, and metal rings to prevent damage to screws or molds.
   • Crushing and dryingCrush the cleaned plastic bottle into small pieces (such as 5-10mm), dry thoroughly until the moisture content is ≤ 0.5%, and avoid moisture causing bubbles or degradation.
2. Additive usage
   • compatibilizerFor mixed plastics such as PE/PP blends, EPDM or EVA compatibilizers can be added to improve compatibility.
   • stabilizerAdd antioxidants and heat stabilizers to reduce thermal oxidative degradation during processing.
   • Fill modificationAdding 10% -35% CaCO3 filler to PP waste film can improve product rigidity and reduce costs.

3、 Die maintenance and operation

1. Mold cleaning
   • Regular cleaningAfter each shift, clean the residual materials in the mold head flow channel to prevent carbonization from blocking the mold holes.
   • Dismantling specificationsWhen cleaning the mold head, loosen the main bolts without disassembling, keep the mold head connected to the granulator, and avoid deformation.
2. Mold head adjustment
   • temperature controlThe temperature of the mold head should match the temperature of the material barrel to avoid excessive temperature differences that may cause product deformation or surface defects.
   • Mold hole adjustmentAdjust the gap between the mold holes according to the particle size requirements, and use a soft material (such as copper or brass) scraper to clean the mold mouth to prevent scratches.
3. professional operation
   • Replace the mold headProfessional personnel are required to operate, dismantle, clean, and repair at designated locations, away from the production site to prevent contamination.

4、 Safety protection measures

1. personal protection
   • Fully equippedOperators are required to wear protective goggles, gloves, dust masks, safety shoes, etc. to prevent injury from high-temperature materials or splashes.
   • dress codeDo not wear loose clothing near moving parts to avoid getting involved in accidents.
2. Equipment protection
   • Installation of protective coverInstall protective covers on rotating components such as screws and gears to prevent personnel from coming into contact.
   • Emergency shutdownEnsure that the emergency stop button is clearly located and easy to operate, and regularly test its effectiveness.
3. fire safety
   • 灭火器配置Place dry powder fire extinguishers around the equipment and regularly check their expiration date.
   • well-ventilatedMaintain ventilation at the production site to avoid the accumulation of flammable gases.

5、 Daily maintenance and upkeep

1. Lubrication and replacement
   • Gearbox lubricationRegularly replace lubricating oil that meets the requirements to reduce wear and tear.
   • Replacement of vulnerable partsReplace screws and barrels every 1-2 years based on wear and tear, and regularly replace heating rings, seals, etc.
2. Filter cleaning
   • regular replacementClean or replace the filter screen after each shift to prevent residue accumulation from affecting product quality.
3. data recording
   • operation logRecord equipment operating time, temperature settings, fault conditions, and other information to facilitate problem analysis and process optimization.

6、 Fault handling and emergency response

1. abnormal shutdown
   • Immediately stop the machineWhen abnormal equipment is detected (such as abnormal noise, vibration, or temperature loss), immediately press the emergency stop button and cut off the power supply.
   • Report maintenanceNon professionals are not allowed to disassemble the equipment without authorization, and professional maintenance personnel are required to handle the malfunction.
2. Mold blockage
   • Shutdown cleaningClose the feed valve, empty the remaining material in the hopper, and remove the mold head to clean the residue.
   • preventive measuresAdd an iron remover at the feed inlet to remove metal impurities and reduce the risk of blockage.