1.Daily Maintenance
Cleaning: Before startup, wipe the die lip with a soft cloth to remove residual material and carbides. After shutdown, promptly clean the residual material and grease off the die, pressure rollers and traction rollers.
Lubrication Inspection: Visually check whether all lubrication points (e.g., pressure roller bearings, chains) are lubricated and free from oil leakage.
Key Parameter Verification:Temperature: Check if the temperature control of each heating zone (barrel, die) is accurate and stable.Pressure: Observe whether the melt pressure of the main machine fluctuates within the normal range.Operation Status: Listen for abnormal vibration or noise during equipment operation; check if the uniformity and thickness of the extruded sheet are stable.
Auxiliary Systems: Confirm that the cooling water circuit is unobstructed and the vacuum or exhaust system is functioning properly.
2.Weekly Maintenance
In-depth Cleaning: Thoroughly clean the internal flow channels of the die (special polishing paste can be used). Clean the area of the screen changer unit.
Wear Inspection:Bolts/Nuts: Inspect and tighten the bolts of key connecting parts such as equipment anchor bolts, couplings and flanges.Transmission System: Check the tightness and wear condition of the transmission belts or chains.Instruments: Calibrate portable testing tools such as infrared thermometers.
Lubrication Replenishment: According to the equipment manual, replenish grease at points requiring regular lubrication
3.Monthly/Regular Maintenance
Heating Elements and Sensors：Translation: Check whether the heating coils and thermocouples are intact, tighten the wiring connections, and ensure accurate temperature control.
Gearbox/Reducer：Check the oil level and oil quality, and replace the lubricating oil according to the cycle specified in the manual.
Electrical System：Clean the dust inside the electrical control cabinet and check for loose wiring terminals to prevent electrical failures.
Hydraulic/Pneumatic System：Check the sealing performance of oil cylinders/air cylinders, clean the filters, and verify that the oil pressure and air pressure are stable.
Screw and Barrel：Check the wear of the screw and the smoothness of the barrel inner wall, which is crucial for maintaining plasticizing capacity and pressure stability.