Abstract:
Multistrand metal cable of 4 x (4+M) construction, which can especially be used for reinforcing tyre belts for industrial vehicles, formed from four elementary strands assembled in a helix with a helix pitch (P3), each elementary strand consisting of a two-layer cable of 4+M construction comprising an inner layer (C1) formed from four wires of diameter (D1), assembled in a helix with a pitch (P1), and an unsaturated outer layer (C2) of M wires, M being greater than or equal to 8 and smaller than or equal to 11, of diameter (D2), these being assembled in a helix with a pitch (P2) around the inner layer (C1), (P1) being smaller than (P2), the four wires of the inner layer (C1) being wound in a helix in the same twist direction as the M wires of the outer layer (C2), and wherein each of the diameters (D1) and (D2) is greater than or equal to 0.10 mm but less than or equal to 0.50 mm.
Abstract:
An easy-to-produce annular metal cord exhibiting excellent break strength and an endless metal belt are provided. The annular metal cord has an annular core portion (3) and an outer layer portion (4). The annular core portion (3) is formed by bonding the opposite ends of a first strand material (1) consisting of six stranded first metal wires (5). The outer layer portion (4) is formed by winding a second strand material (2) consisting of six stranded second metal wires (6) six turns spirally around the annular core portion (3). The second strand material (2) is wound at a predetermined winding angle with respect to the central axis of the annular core portion (3), wherein the start-of-winding portion and the end-of-winding portion are coupled. Since six second strand materials (2) are not wound but the second strand material (2) are wound six turns, only one second strand material is required and the second strand material is coupled at only one position. Consequently, break strength of the annular metal cord can be enhanced while production is facilitated.
Abstract:
With a wire rope comprising at least one plastic core (11) and a number of wire strands (15) twisted around the latter a helical groove (20) is respectively produced by machining around the periphery of the plastic core (11) for each wire strand (15). The cross section of these helical grooves (20) is respectively matched to the outside diameter of the wire strands (15). The plastic core (11) is provided with the helical grooves (20) for receiving the wire strands (15) by this machining directly before the wire strands (15) are wound onto said core. By thus forming the wire rope by means of this machining in order to produce helical grooves of the plastic core, optimal guiding of the wire strands in the twisted state is achieved, and so overall there are improvements to the properties of the wire rope.
Abstract:
J strands form a core. K outer strands are wound around it in a helix with pitch PK, each having a cord with an L wire inner layer of diameter d1, and an M wire outer layer of diameter d2, wound around the inner layer in a helix with pitch p2; with (in mm): 0.10