Extrusion & Post
12 görüntüleme
Uneven Thickness of Polypropylene Blown Film
Sorun Belirtisi
The thickness of the film fluctuates greatly in the circumferential or longitudinal direction, and the thickness deviation exceeds ±10%.
Uneven thickness affects the mechanical properties and use performance of the film, and may cause deviation or film breakage on automatic packaging machines.
Neden Analizi
(1) The die gap is uneven
(2) The temperature in the circumferential direction of the die is uneven
(3) The air ring cooling is uneven
(4) The extrusion output fluctuates
(5) The haul-off speed is unstable
Çözüm
(1) Adjust the die gap, with a circumferential error not exceeding ±0.01mm
(2) Check the die heating bands to ensure the circumferential temperature difference does not exceed ±3°C (range 200-280°C)
(3) Check the air ring to ensure uniform air output, and clean the air ring regularly
(4) Stabilize the screw speed and temperature of the extruder
(5) Stabilize the haul-off speed, using a high-precision haul-off control system
Temel Çıkarım
Uneven film thickness is caused by uneven die gap, temperature, or cooling, and needs to be solved from mold precision and process stability.
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!