The following is a maintenance guide for film blowing machines, covering daily inspections, regular maintenance, common troubleshooting, and safe operation recommendations to help ensure efficient operation of the equipment and extend its service life:
Visual Inspections: Check heater bands, thermocouples, and temperature gauges for functionality.Inspect for resin leaks, material buildup, or foreign particles.
Lubrication system: Confirm that the gearbox, bearings, chains and other components are adequately lubricated and the oil level is normal.
Electrical and wiring: Ensure that the cables, sensors, and heating coils are firmly connected without the risk of aging or short circuit.
Screws and fasteners: Check whether the screws in the die head, extruder, traction roller and other parts are loose.
Temperature control: Observe whether the temperature of each zone of the extruder and the temperature of the die head are stable to avoid overheating or temperature fluctuations.
Pressure monitoring: Check the melt pressure of the extruder. Abnormal increase may indicate screw/barrel wear or die head blockage.
Cooling system: Ensure that the cooling water circulation is normal and the water temperature meets the process requirements to avoid uneven cooling and film defects.
Film quality: observe the film thickness, transparency, and bubble stability in real time, and adjust the process parameters in time.
Cleaning the die and the mouth: After stopping the machine, use a copper brush or special cleaning agent to remove carbon deposits and residual materials from the die to avoid blockage.
Check the belt and chain: adjust the belt tension, clean the chain and lubricate it.
Calibrate the sensor: verify the accuracy of the temperature and pressure sensor readings, and calibrate if necessary.
Replace lubricating oil: replace the lubricating oil of the gearbox and reducer according to the manufacturer's specified cycle, and clean the oil filter.
Cooling system maintenance: clean the scale in the water tank and pipes, and check the sealing of the water pump and valve.
Safety device test: verify that the emergency stop button, protective cover interlock switch and other functions are normal.
Uneven Thickness: Misaligned die, uneven cooling, or air ring blockage.
Bubbles/Gels: Contaminated resin, degraded material, or improper melt temperature.
Bubble Instability: Incorrect air pressure, cooling rate, or resin moisture.
Motor Overload: Worn screw, high friction, or voltage fluctuations.
Above is a comprehensive guide to maintaining your film blowing machine to ensure optimal performance, lifespan and consistent film quality.
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