Process and apparatus for the production of strands for Bowden cables

摘要

A process for the production and further processing of strands for Bowden cables of several wires stranded together by twisting, comprising dressing the strands after stranding between reversing rolls, subsequently stretching and again dressing between reversing rolls. Dressing is effected prior to stretching in several stages with decreasing bending radii and after the stretching again in several stages with increasing bending radii, while the stretching is performed with a force approximately within the area of the elastic limit, corresponding to 45% to 70%, preferably to 55% and 65% of the ultimate tensile strength of the strand. The apparatus comprises a dressing line of two roll conveyors with reversing rolls set in gaps with respect to each other on alternating sides, a stretching line with two tension sheaves set at a constant distance, one of which is driven by a brake motor and the other by a tension motor, another dressing line of two roll conveyors with reversing rolls set in gaps with respect to each other on alternating sides. The rolls of the lower conveyor and of the upper conveyor are combined respectively in magazines and the lower conveyor is mounted stationarily and the upper conveyor is mounted on a stand in a height adjustable manner perpendicularly to the lower conveyor.