| 摘要 |
PURPOSE:To manufacture a bundle twisted steel cord easily from many strands, by dividing six or more strands into >=2 groups of strands, giving temporary twisting of below normal twisting pitch to the strands and binding them into a bundle and twisting at normal pitches. CONSTITUTION:For instance, twenty eight strands 1 are grouped into seven sets of four strands each, and drawn out from a delivery reel 6. Each strand group is twisted temporarily at below normal twisting pitches by a false twisting device 8. By this way, spiral plastic deformation is given beforehand to the strands 1. Then, these strand groups are bound into a bundle and fed to a puncher twisting machine 19, and twisted at normal twisting pitches of the same direction with false twisting. |
