Plastic film blowing machine due to its own some factors caused by the film product problems, wrinkles and film bubble instability often appear two problems; The thickness of the film is not uniform, the air volume of the cooling air ring is not stable, and the cooling of the membrane bubble is not uniform. What causes this?
1, the film wrinkle failure
Reasons :① thin thickness is not uniform; (2) The cooling effect is not enough, (3) the blowing ratio is too large, causing the membrane bubble to be unstable, swinging around and back, and easy to wrinkle; ④ The Angle of the miter splint is too large, the membrane bubble is flattened in a short distance, so the film is also prone to wrinkles, ⑤ the pressure on both sides of the traction roller is inconsistent, one side is high and the other is low, and the axis between the guide rollers is not parallel, affecting the stability and malleability of the film, resulting in wrinkles.
Solution: Adjust the thickness of the film to ensure that the thickness is uniform: (2) improve the cooling effect of the plastic film blowing machine to ensure that the film can be fully cooled: (3) appropriately reduce the blowing ratio; ④ Properly reduce the Angle of the herringbone splint: adjust the traction pressure to ensure that the film is evenly stressed; ⑥ Check the axes of each guide axis and make them parallel to each other.
2, plastic film blowing machine membrane bubble instability failure
Reasons: the extrusion temperature is too high, the fluidity of the molten resin is too large, the viscosity is too small, easy to fluctuate, the extrusion temperature is too low, the discharge amount is less, the air volume of the cooling air ring is unstable, and the cooling of the belly bubble is not uniform :④ the interference and influence of the external strong air flow solution :① adjust the extrusion temperature,② adjust the extrusion temperature; ③ Check the cooling air ring to ensure that the air supply volume around is uniform, and ④ prevent and reduce the interference of external air flow. The above is about the "plastic film blowing machine film wrinkle and membrane bubble instability fault solution", I hope to help you.
