IT1071669B - Winding multistrand insulated electric cable - using machine fitted with prewinding head supplied via pretensioned wire feed rollers - Google Patents

Abstract

Laying and winding plant, esp. for mfg. electric cables or leads, uses a rotor for double winding, and banks of grooved guide rollers supplying the individual strands. The novelty is that the wires travel from spools through two sets of grooved tensioning and guide rollers, sepd. by a row of rollers rotating at different speeds and fitted with pre-tensioned brakes, the three banks of rollers being fitted on a fram which can be adjusted both sideways and vertically. The wires then travel through a pre-winding unit which consists of an arm along which carriers can be adjusted longitudinally; the carriers are fitted with winding heads, the number of the latter matching the layers which are to be wound on the core wire. The plant is used e.g. for winding cables from wire coated with plastic or rubber insulation. Due to the use of the row of pretensioned rollers travelling at different speeds, concentric windings can be obtd. with a uniform surface, irrespective of the number of layers. The invention lowers winding costs by 30-50% of conventional machines, and the amt. of insulation required is reduced.