Abstract:
A coreless glass fiber cable is made of a plurality of individual substantially untwisted glass fiber rovings twisted together. Certain of the rovings are impregnated with one component of an elastomeric resin with the remainder of the rovings impregnated with the second component of the elastomeric resin. The impregnated rovings are spirally twisted together in the same direction at substantially the same helical angle, the two components of the elastomeric resin impregnating the rovings mixing with each other at the junction of the intertwining of the rovings to form a cured elastomer spacing the glass fiber rovings and filaments making up the rovings from each other. The layed up glass fiber cable is fed back on itself and subsequent layers of impregnated rovings plied together over the initial layers. The subsequently applied layers are applied at the same helical angle as the initial layer. The cable, although useful for other purposes, is particularly useful in the manufacture of endless track for track vehicles, the endless track comprising a plurality of individual track sections strung along a cable of the type mentioned.
Abstract:
In a method of manufacturing a two-layer multistrand metal cord, N wires constituting an outer strand layer are wound in a helix around two wires constituting an inner strand layer, so as to form a strand. L>1 previously formed strands, which are incorporated as outer strands of an unsaturated outer cord layer of the cord, are wound in a helix around K>1 previously formed strands, which are incorporated as inner strands of an inner cord layer of the cord, to form a wound cord. The wound cord is overtwisted, the overtwisted cord is balanced so as to obtain zero residual torque in the overtwisted cord, and the balanced overtwisted cord is untwisted.
Abstract:
Provided are a steel cord for reinforcing rubber whose fatigue resistance is increased more than ever to enable achieving high durability that was not conventionally realized, and a pneumatic radial tire including the steel cord as a reinforcement member.In a steel cord for reinforcing rubber having a double-twist structure that includes a plurality of strands twisted together in the same direction with the same pitch and including a central structure and at least one outer layer, the central structure is composed of at least two strands being twisted around each other and each being composed of at least seven filaments being twisted together. In a steel cord for reinforcing rubber including at least three core strands being twisted together and at least six sheath strands being twisted together around the core strands, the core strands and the sheath strands are twisted in the same direction.
Abstract:
The invention relates to a rope (1) made of textile fibre material, which is characterized by the combination of features wherebya) the load-bearing fibre material of the rope (1) consists of high-strength synthetic fibresb) the rope (1) is in the form of a spiral strand ropec) the rope (1) has at least two, preferably at least three concentric load-bearing strand layers (3,4,5)d) the individual strands (7,8,9,10,11,12) of the strand layers (3,4,5) are movable with respect to one anothere) the degree of filling of the rope (1) with textile fibre material is ≧75%, preferably ≧85%f) the outermost ply (5,6) of the rope has a coefficient of frictionμ with respect to steel of μ
Abstract:
A steel cord (10) has a diameter D and includes a core strand (12) and up to nine peripheral strands (14) surrounding the core strand. The core strand (12) has a diameter D1 and the peripheral strands (14) have a diameter D2. The ratio core strand diameter to peripheral strand diameter D1/D2 is greater than a predetermined value in order to enable rubber penetration. Each strand has a center of one or more center filaments (16, 22) and two or more layers of filaments (18, 20, 24, 26) surrounding the center. The twist angle of a radially outer layer is smaller than the twist angle of a radially inner layer of the same strand. A first free space (28) ranging from 0.0015.times.D to 0.0075.times.D is provided in at least the core strand between each pair of filaments (18) of the radially most inner layer.
Abstract:
A two-layer multistrand metal cord includes an inner cord layer and an outer cord layer. The inner cord layer is formed of K>1 inner strands, which are wound in a helix. The outer cord layer is unsaturated and formed of L>1 outer strands, which are wound in a helix around the inner cord layer. Each strand of the inner cord layer and the outer cord layer includes an inner strand layer and an outer strand layer. The inner strand layer is formed of two inner wires. The outer strand layer is formed of N outer wires, which are wound in a helix around the inner strand layer.
Abstract:
A wire rope for a heavy-load crane, such as a ladle crane is provided that is not only almost rotation-resistant but is also unlikely to be broken by wear and fatigue of wires. The rotation-resisting wire rope has a plurality of side strands. In side each strand, wires are laid in the same direction as the lay of core strand wires, around the periphery of a core strand. The side strands are laid in a direction opposite to the lay of the core strand wires so as to form the wire rope. The side strands preferably have a smaller pitch multiple than a pitch multiple of the wire rope. The ratio between a diameter of the side strands and a diameter of the core strand is preferably about 1.3 to about 1.8. The pitch multiple of strands is preferably about 5 to about 8 and the pitch multiple of the wire rope is preferably about 8 to about 10. Both the core strand and the side strands preferably have shaped wires, having a flattened surface, at an outermost ply.
Abstract:
Provided are a steel cord for reinforcing rubber whose fatigue resistance is increased more than ever to enable achieving high durability that was not conventionally realized, and a pneumatic radial tire including the steel cord as a reinforcement member.In a steel cord for reinforcing rubber having a double-twist structure that includes a plurality of strands twisted together in the same direction with the same pitch and including a central structure and at least one outer layer, the central structure is composed of at least two strands being twisted around each other and each being composed of at least seven filaments being twisted together. In a steel cord for reinforcing rubber including at least three core strands being twisted together and at least six sheath strands being twisted together around the core strands, the core strands and the sheath strands are twisted in the same direction.
Abstract:
The method of making a concentric wire rope on a double twist strander in which the rope is comprised of outer strands and a core strand and in which the lay of the wires of the outer strands is opposite the lay of the wires of the core strand and in the finished rope the length of the lay of the wires of the core strand has been shortened and the length of the lay of the wires of the outer strands has been increased.