Targeted system maintenance of blown film machine

Blow film machine die head system:
① The startup heating adopts a secondary heating method to avoid temperature overshoot.
② Before starting and stopping the machine, use a pure copper scraper to clean the accumulated material, paraffin to clean the membrane opening, and reduce the impact of precipitates on the membrane bubbles.
③ Cover the protective felt promptly after shutdown to avoid damage to the mold. (This method is used for the upper blower)
④ Regularly check the temperature and current of each temperature zone and membrane heating plug, and correct the temperature difference.
⑤ Correct the level of the mold head and match the center point with the traction.
⑥ Use a torque wrench to disassemble the mold screws, and operate according to the specified torque. Use molybdenum disulfide grease for the high-temperature parts of the screws.
⑦ Welding and cutting of molds are prohibited.
Inspection and maintenance of blown film machine system
1. Feeding machine system: Clean the filter in a timely manner and check for any air leaks in the negative pressure feeding system.
2. Extruder system:
① Observe the pressure gauge and main motor current, and clean the screen changer in a timely manner
② Check for noise and overheating in the gearbox, screws, and main motor
③ Check the operating frequency, current, and temperature rise of the frequency converter, and clean the dust on the motor and frequency converter on time.
④ Correct the measurement error between thermocouple and actual temperature.
⑤ Correct the placement of the extruder, adjust the groove wheel to ensure that the extruder is placed at an angle and level.