Apparatus for SZ twisting twist elements of electric cables and lines as well as method of operating this apparatus
AssigneeSiemens Aktiengesellschaft
InventorDieter Vogelsberg
Life of this patent
Estimating the term…
Abstract
In apparatus for SZ twisting twist elements of electric cables so that twisted units, in which the distance between the reversal points of the twist direction is about 500 to 1000 m, can be manufactured with apparatus of relatively short overall length, the basically straight accumulator section of the SZ twisting machine is divided into several subsections arranged in different, preferably parallel planes and connected to each other by deflection devices. The devices provided for guiding and deflecting the material to be twisted make possible or ensure the rotation of the material to be twisted in the region of the individual subsections of the accumulator.
Claims22
In apparatus for SZ twisting twist elements of electric cables and lines by means of an accumulator which is arranged between a stationary unwind device for the twist elements and a pull-off and take-up device for the twisted material and which includes a first twisting point arranged at the entrance of the accumulator, a second twisting point at the exit of the accumulator and twisting heads arranged immediately behind the first twisting point and immediately ahead of the second twisting point, respectively, said twisting heads rotatable at changing speeds, the axes of rotation of the twisting heads lying on the twisting axis, along which the twist elements assembled into a strand are conducted, the improvement comprising:
- (a) a plurality of stationary guides for straight guidance and at least one stationary guide for deflecting the strand formed by the twist elements disposed between the two twisting heads;
- (b) said twisting heads and straight guides arranged equiaxially in different planes;
- (c) a guide for deflecting the strand being arranged between the last straight guide of each plane and the first straight guide of a next following plane, and
- (d) means for preventing the development of friction forces between said straight guides and said twist elements.
A method for operating an SZ twisting apparatus for twisting twist elements of electrical cables and lines by means of an accumulator which is arranged between a stationary unwind device for the twist elements and a pull-off and take-up device for the twisted material and which includes a first twisting point arranged at the entrance of the accumulator, a second twisting point at the exit of the accumulator and twisting heads arranged immediately behind the first twisting point and immediately ahead of the second twisting point, respectively, said twisting heads rotatable at changing speeds, the axis of rotation of the twisting heads lying on the twisting axis, along which the twist elements assembled into a strand are conducted, said apparatus includes a plurality of stationary guides for straight guidance and at least one stationary guide for deflecting the strand formed by the twist elements disposed between the two twisting heads, twisting heads and straight guides which are arranged equiaxially in different planes, a guide for deflecting the strand arranged between the last straight guide of each plane and the first straight guide of a next following plane, and means for preventing the development of friction forces between said straight guides and said twist elements, comprising synchronously varying the rotary motions of the twisting heads in steps at intervals which correspond to the running time of a cross-section element of the strand between the first twisting point and the second twisting point while the direction of rotation remains the same, alternatingly in at least two increasing and an equal number of decreasing steps.
Dependencies are inferred from the claim text.