1. Poor quality: the cable is serpentine after cable forming.
Analysis of the causes of the defects:
1. Uneven cable tension
2. The cable pitch does not meet the requirements
3. Take up and arrange the wires in a snake shape
Solution:
1. Adjust the setting out tension.
2. Adjust the pitch.
3. Pay attention to the tight and neat arrangement of wires.
2. Bad quality phenomenon: the fan-shaped insulation core turns over
Analysis of the causes of the defects:
1. Improper pretwist angle.
2. The wire core on the pay off reel turns over, which is caused by the wire core back twisting when it is put down separately.
Solution:
1. Adjust the pretwist angle or the distance between the die and the core guide wheel.
2. Properly adjust the pre twist angle. When placing the core on both sides of the coil, pay special attention to the angle of the core into the die.
Poor quality:
Core insulation damage
Analysis of the causes of the defects:
1. The insulated core is damaged during transportation and storage after being laid down.
2. The insulation of the insulated core coil is damaged by the ferrule during the cabling process.
3. Improper twisting of core insulation during cabling.
Solution:
1. Do not damage the insulation during storage and transportation
2. Handle the snares found in the winding and arranging of core insulation in time
3. Pre twist properly
Less core: Operation interruption line or end is not found in time
Extrusion has grain: single stranded into cable, cage stranded. Pipe stranded without (different ways of stranding)
Coil off: shaft not locked
Selection of cable forming die:
1. Parallel die: outer diameter of finished cable + (1-2) mm
2. Sizing die: outer diameter of finished cable + (0.5-1) mm
3. Die diameter before winding = parallel die diameter
4. The diameter of the die after winding = the outer diameter of the winding after cabling + (1-3) mm
Selection of cable wrapping tape:
1. PP rope filled cable is wound with two layers of non-woven fabric
2. A layer of non-woven fabric is overlapped and wrapped when the foam filler is filled