The common faults of PP film blowing machine in the production process mainly include the following aspects
First, temperature control
Improper head temperature control:
Description of the problem: too high or too low temperature of the head may lead to problems such as film difficulty and unstable film quality.
Solution: According to the melting characteristics of PP material, adjust the head temperature to the appropriate range to ensure that the melt has the appropriate viscosity at the die head, which is easy to form a stable film.
Body and die temperature anomalies:
Description of the problem: Too high or too low temperature of the body and die may affect the plasticizing effect and molding quality of the film.
Solution: Check and adjust the body and die temperature regularly to ensure that it fluctuates within the appropriate range to ensure the uniformity and stability of the film.
Second, extrusion process problems
Uneven discharge of die:
Problem description: Uneven die clearance or impurities at the discharge port may lead to uneven discharge, affecting the uniformity of thickness and thickness of the film.
Solution: Adjust the gap of the die, ensure that the surrounding gap is uniform, and clean up the impurities at the discharge port to keep the discharge smooth.
Improper control of extrusion process conditions:
Problem description: Unreasonable setting of extrusion speed, pressure and other process conditions may lead to unstable film quality.
Solution: According to the production demand and material characteristics, reasonably adjust the extrusion process conditions to ensure the molding quality of the film.
Three, film forming problems
Bubble tube skew:
Problem description: The bubble tube is skewed during the forming process, which affects the flatness and width of the film.
Solution: Check and adjust the body and die temperature, head connector temperature and other parameters to ensure that the blister tube stable forming. At the same time, check the working state of the traction device and cooling wind ring to ensure that the traction speed and cooling effect meet the production requirements.
Film creasing:
Problem description: The surface of the film is wrinkled or corrugated, which affects the appearance quality.
Solution: Adjust the clamping force of the splint and the Angle of the miter plate to ensure that the film is subjected to uniform force during the forming process. At the same time, check the air volume and pressure of the cooling air ring to ensure that the film is uniformly cooled.
4. Other mechanical failures
Screw wear or stuck:
Problem description: The screw may be worn or stuck after long-term use, affecting the extrusion effect.
Solution: Check the wear of the screw regularly and replace the parts with serious wear in time. At the same time, pay attention to the cleaning and maintenance of the screw to avoid impurities entering the inside of the screw causing stuck.
Transmission component failure:
Problem description: Failure of transmission components such as bearings and gears may affect the normal operation of the equipment.
Solution: Check the lubrication and wear of the transmission parts regularly, and replace the damaged parts in time. At the same time, pay attention to the cleaning and maintenance of the transmission components to avoid impurities entering and causing failure.
5. Interference from external factors
External airflow interference:
Problem description: Strong external air flow may interfere with the stable forming of the blister tube, resulting in a decline in film quality.
Solution: Set screens and other occlusions around the film blowing machine to reduce the interference of external air flow. At the same time, the wind direction and air volume of the cooling wind ring are adjusted to ensure the stable cooling effect of the bubble tube.
