摘要:
A stranding machine, particularly for making telecommunication cable, having a cage with feed reels, a take-up reel, and a back-rotation device which includes two eccentric discs journalled eccentrically with respect to each other in a rotatable guide ring. The discs have a plurality of corresponding bores in identical patterns, each pair of corresponding bores having an eccentric shaft journalled in the two bores so that eccentric motion of the discs causes the eccentric shafts to rotate. Each eccentric shaft has a bore for feeding a wire strand through it and a clamping member which rotates with the eccentric shaft for imparting torque to the strand, by driving the guide ring independently of the discs, so that back-rotation can be varied.
摘要:
A cable comprised of coated conductors, wound together and compacted, has an insulating strip interposed between the two layers in which the conductors are disposed, to ensure good insulation therebetween. Apparatus for producing the cable includes a stranding machine, with which a hollow mandrel is used for the purpose of introducing the insulating strip between the layers of conductors, and a method for producing the cable is also provided.
摘要:
Apparatus for stranding two or more wires together comprising a wire guide means extending in a wire pass direction to a twisting station, the guide means held against rotation about an axis at its upstream end and being rotationally flexible to be torsionally twisted by a rotatable twisting means in the twisting station connected to the downstream end of the guide means. A wire separation tube extends from the twisting means along a fixed curved path section to a stranding station to prevent wires stranding together until they reach the stranding station. The separation tube is rotatable about an axis coinciding with the fixed curved path section and has flexibility to enable the tube to be maintained in its curved configuration along the path with torsional rigidity to avoid build-up and retention of twist.
摘要:
Wire stranding apparatus having a single tube defining a single axial passage providing at least two side-by-side feedpaths for wire, the passage being shaped to prevent wires from moving across from one feedpath to another. The tube is rotationally flexible to torsionally twist it in alternating directions by use of a twisting means at its downstream end while the upstream end is held against rotation. Change in twist direction occurs after a predetermined number of rotations of the twisting means. To accommodate axial contraction and extension during twisting, the tubular means has an axially acting resilient means which maintains axial tension in the tubular means.
摘要:
The present invention relates to improvements in rotary quadrants of cable-making machines, for use in the production of strands composed of elementary filaments, the said quadrant being constituted by a supple member fixed at its two ends on two support members driven in rotation about the same axis, so that, in the rest position, the strand to be produced is stretched between the two support members, and in the working position, the said strand comes, under the effect of the centrifugal force, in resting contact against the supple member.The invention finds an application in cable-making machines.
摘要:
A method and apparatus for forming a non-tensioned multi-conduit line from a plurality of conduits and a central core as the plurality of conduits and central core are pulled longitudinally along the length thereof including the securing of conduits in a non-twisted contacting condition about the central core and oscillating the conduits about the central core prior to securing to alternately rotate the conduits in opposite directions about the central core such that the conduits contact the central core for substantially 360.degree. in each direction without introducing torsional stresses on the conduits prior to the securing thereof to the central core.
摘要:
A cable strand tension-controlling apparatus is described. As numerous individual wire or fibre-optic cable strand material is fed from multiple pay-off neutralizers, the cable strand material is directed across a rotating driven capstan and subsequently a rotating idler capstan. The cable strand then is directed into contact with a moveable accumulator. The moveable accumulator is positioned appropriately in response to the internal tension of the cable strand that is in contact with it. Signals eminating from the rotating moveable accumulator are then transmitted to a take-up in order to control the position and movement of the take-up reel.
摘要:
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.
摘要:
A method of manufacturing collectively stranded wires for communication cables, comprising a process wherein parallel multi-wire sets obtained by the extrusion method from insulating material and a plurality (2, 3 or 4) of conductor wires arranged in parallel are prepared in such a way that said multi-wire sets are different in color from each other and the number thereof corresponds to that of the conductor wires included in each thereof, and said multi-wire sets are drawn out and separated into element wires which are, after given pre-twisting, sorted into groups each consisting of wires of different colors coming from the corresponding sets and then are wound on bobbins, a process in which said bobbins prepared according to desired number of stranded wires to be collected are mounted on delivery stations of stranding machines through which the wires are stranded and sent out as pairs, 3-conductor or 4-conductor wires, and a process wherein desired number of said stranded wires are collected.
摘要:
Self-twist plural yarn strands are produced by a system wherein at least two singles yarn strands are individually twisted to form twisted strands each having longitudinally spaced nodes. The strands are separately conveyed around a yarn wheel and brought together in a parallel relationship with the nodes of one strand substantially aligned with the nodes of each other strand. The corresponding nodes from one strand are fastened to those of each other strand by heating with an electric arc and the strands are removed from the wheel and allowed to ply. The node fastening means comprises a pair of electrodes and a circuit for supplying arc-producing voltage across the electrodes. One electrode is mounted on the wheel and extends diagonally across and under the node location. The other electrode is fixed adjacent the wheel so that the arc traverses the yarn as it passes from one end of the diagonal electrode to the other.