Single wire back strands, loose strands in bundled wires and stranded wires
Causes: ● The tension of the pay-off is uneven, the looseness is tight, and the loosely tensioned cores go too much, causing back strands; ●The hole shape of the die is too large to properly adjust the tension; ● The die Improper position, unreasonable twist angle; ● The pitch is relatively large.
The harnessing machine bundles single cores with 19 strands or more. Since there is no difference in the direction of the harnesses, they can only be bundled in the same direction, so the combination of the cores is irregular. At present, most manufacturers use the double-pitch bundle system. The wire harness has more than 19 strands, and the back strands and loose strands are more serious than stranded wires.
Removal methods for bundled wires (bundle products with more than one strand): ● Improve the wire-paying device of the bundled wire, and adopt a more advanced single-wire tension pay-off device, so that the tension of each single wire can be adjusted and controlled. ● Using a guide die, the aperture of the guide die is 97% of the calculated outer diameter of the beam line. In this way, the guide die can properly adjust the tension. ● Use a single-pitch wire-bundling machine instead. The bundled products of this wire-bundling machine can reach the level of stranding. ● For the back strands and serious loose strands, the wire cores can be repaired by over-mold rewinding, which can also meet the requirements of use. ● Properly adjust the pitch ratio.