Common Faults And Solutions Of Double-color Stripe PE Film Blowing Machine

Common Problems & Solutions (Concise English Version)

1. Uneven width of two-color stripes

Problem: One color strip is wider/narrower, offset stripes
Solutions

1. Adjust screw speed of the two extruders to keep output synchronous
2. Level the co-extrusion die head tightly
3. Clean blocked flow channels inside the die

2. Color stripes blurred & mixed together

Problem: Two colors blend, no clear dividing line
Solutions

1. Lower die head temperature properly to avoid melt over-flow
2. Dismantle and clean die runner carbon deposits
3. Check if two material streams have pressure balance

3. Film bubble shakes violently and swings left-right

Solutions

1. Balance air volume of cooling air ring all around
2. Calibrate horizontal position of die head
3. Adjust pressure of traction rubber rollers evenly

4. Film has black spots, burnt particles

Solutions

1. Filter raw material to remove impurities
2. Clean die head and screw residual carbon regularly
3. Reduce overheating temperature of barrel zones

5. Winding roll uneven, wrinkled film

Solutions

1. Activate automatic edge correction device
2. Adjust winding tension and friction resistance
3. Check guide rollers for deformation or dirt

6. Film thickness inconsistency

Solutions

1. Fine tune die head adjusting bolts circumferentially
2. Stabilize cooling air volume
3. Match the speed of extruder, traction and winder

7. Film bubble easy to break during production

Solutions

1. Prevent empty feeding to avoid air suction into extruder
2. Lower excessive cooling wind speed
3. Check for sharp burrs on die lip scratching film

8. Abnormal noise or overheating of extruder motor/reducer

Solutions

1. Check lubricating oil level of reducers
2. Reduce overload extrusion speed
3. Inspect belt tightness and coupling alignment