How to maintain the film blowing machine?

As a film blowing machine, because of the characteristics of its product process, plastic film blowing machines basically operate 24 hours a day. The film blowing equipment running at full load has great loss on the fuselage. If the film blowing machine is not maintained in time, it will affect the service life of the film blowing machine, the accuracy and quality of film products. So as a film blowing machine operator, how to do a good job of maintenance?

1. Electrical maintenance:

Ensure the stability and reliability of power supply, and the performance parameters meet the requirements;

Maintain appropriate temperature and humidity, maintain good grounding, and pay attention to eliminate electrostatic hazards;

Regularly remove the dust from the radiator;

Note: it is forbidden to repair the core parts with electricity in electrical maintenance.

2. Feeder system: clean the filter in time and check the negative pressure feeding system for air leakage.

3. Extruder system:

Observe the current of pressure instrument and main motor, and clean the screen changer in time;

Check the gearbox, screw and main motor for noise and overheating;

Check the operating frequency, current and temperature rise of the frequency converter, and clean the dust of the motor and frequency converter on time;

Correct the error between thermocouple measurement and actual temperature;

Correct the placement of the extruder and adjust the sheave to ensure the placement angle and level of the extruder.

4. Die system:

The secondary heating method shall be adopted for startup heating to avoid temperature overshoot;

Before startup and shutdown, clean the accumulated materials with a pure copper scraper, clean the film mouth with paraffin, and reduce the influence of precipitates on the film bubbles;

After shutdown, cover the protective felt in time to avoid mold damage. (this method is adopted for upper blower);

Regularly check the temperature and current of each temperature zone and membrane port heating plug-in, and correct the temperature difference;

Correct the level of die head and the matching of center point and traction;

Torque wrench shall be used to disassemble the die screws and operate according to the specified torque. Molybdenum disulfide grease shall be used for the screws in the high-temperature part of PE film blowing machine.

Note: it is forbidden to weld and cut the mold.

5. Air ring maintenance: timely clean up the sundries and dust in the air ring.

6. Maintenance of traction device: herringbone folding is free of pollution, the pressure of clamping traction (cooling) roll is appropriate, there is no condensate, and the flattening roll operates flexibly.

7. Corona processor maintenance:

Regularly clean the high-voltage transformer, discharge roller, discharge rack, electric control box and adjust the discharge gap;

Check the humidity of the equipment before startup to avoid short circuit of the discharge frame, and check the operating temperature of the discharge roller bearing;

Replace the silicone hose in time.