Abstract:
A steel cord for the reinforcement of rubber articles comprises a core comprised of three steel filaments, a first sheath formed by twisting nine wave-formed steel filaments around the core, and a second sheath formed by twisting fifteen wave-formed steel filaments around the first sheath in a direction opposite to the twisting direction of the first sheath, in which a forming ratio F.sub.1 of each filament in the first sheath and a forming ratio F.sub.2 of each filament in the second sheath are within a range of 0.75-0.95, respectively, and satisfy Fi.sub.1
Abstract:
An aramid fiber rope having a central core surrounded with aramid fiber rope strands. The core and the aramid strands are coated with a heavy viscous lubricant prior to winding the strands into rope. The lubricated rope is then impregnated and surrounded with a plastic material to entrap the lubricant in the core and the strands.
Abstract:
A cable for reinforcing objects formed of elastic or easily deformable material, such as automobile tires and conveyor belts, has as conventional components a core and at least one peripheral layer surrounding the core, each component being formed of elements, such as individual wires or strands of wires. The resistance of such a reinforcing cable to fatigue and/or to wear is increased due to the fact that at least two consecutive components in contact with each other in radial direction are constituted of elements made of material having moduli of elasticity which differ from one component to the other.
Abstract:
A composite twisted wire (1) which is obtained by twisting a plurality of strands. This composite twisted wire (1) includes: an aluminum-covered strand (2) that is obtained by forming a coating film (2b), which is formed of aluminum or an aluminum alloy, on the surface of a steel wire (2a); and an aluminum wire (3) that is formed of aluminum or an aluminum alloy. This composite twisted wire is reduced in weight, while exhibiting excellent tensile strength and excellent long-term stability with respect to electrical resistance. Consequently, this composite twisted wire is suitable, for example, for use as a wire harness of automobiles.
Abstract:
A hybrid rope (40) or a hybrid strand (50) comprising a core element (42, 52), a first (44, 54) and a second (46, 56) metallic closed layer surrounding said core element (42, 52). The core element (42, 52) includes a bundle of synthetic yarns. The first metallic closed layer (44, 54) includes a plurality of first strands of wires helically twisted together with the core element (42, 52) in a first direction. The second metallic closed layer (46, 56) includes a plurality of second wires or strands helically twisted together with said core element (42, 52) and said first metallic closed layer (44, 54) in a second direction. The cross-sectional area of the core element (42, 52) is larger than the total cross-sectional area of the first (44, 54) and second (46, 56) metallic closed layers. A corresponding method of producing such a hybrid rope or hybrid strand is also disclosed.
Abstract:
A wire strand (10) comprises a plurality of wires (12, 16, 20). The wires comprise a central king wire (12), a first layer (14) of wires (16) arranged around the king wire, and a second layer (18) of wires (20) arranged around the first layer. The king wire is formed of steel having a carbon content of at least 0.3 wt %. Each wire of the first layer is formed of steel having a carbon content which is less than the carbon content of the king wire. Each wire of the second layer is formed of steel having a carbon content which is greater than, or the same as, the carbon content of the wires of the first layer.
Abstract:
A twisted cable includes a main body which includes a central filament and a plurality of twisted filaments. The twisted filaments are arranged around the central filament and include six first filaments, twelve second filaments, and eighteen third filaments from the central filament outward. The cross-section of each first filament is the same with the one of each second filament. The cross-section of each first filament is larger than the one of the third filament but smaller than the one of the central filament. The twisted filaments are twisted around the central filament. As a result, the twisted cable of the present invention has improved structure strength, appropriate toughness, and smaller amount of longitudinal deformation.
Abstract:
Method of manufacturing a metal cord with three concentric layers (C1, C2, C3), of the type rubberized in situ, i.e. during its manufacture comprising a first, internal, layer or core (C1), around which there are wound together in a helix, at a pitch p2, in a second, intermediate, layer (C2), N wires of diameter d2, N varying from 3 to 12, around which second layer there are wound together as a helix at a pitch p3, in a third, outer, layer (C3), P wires of diameter d3, P varying from 8 to 20, the said method comprising the following steps: a sheathing step in which the core (C1) is sheathed with a rubber composition named “filling rubber”, in the uncrosslinked state; an assembling step by twisting the N wires of the second layer (C2) around the core (C1) thus sheathed in order to form, at a point named the “assembling point”, an intermediate cord named a “core strand” (C1+C2); an assembling step in which the P wires of the third layer (C3) are twisted around the core strand (C1+C2); a final twist-balancing step.
Abstract:
In a multi-strand steel cable, at least three layers are present. An inner layer includes from 1 to 4 wires. An intermediate layer surrounds the inner layer and includes from 3 to 12 wires wound together in a helix at a pitch p2. An outer layer surrounds the intermediate layer and includes from 8 to 20 wires wound together in a helix at a pitch p3. A rubber sheath covers at least the intermediate layer and is formed of a cross-linkable or cross-linked rubber composition that includes at least one diene elastomer.
Abstract:
The twisted cable is produced by entwisting plural surround wires together on a central wire. The surround wires have several different sizes. The surround wires are arranged in a particular arrangement so as to reduce elongation when stretch force is exerted on the twisted cable. In addition, the outer surround wires have smoothened outer surfaces, so that the twisted cable has smooth and satiny outer surface. Friction and abrasion caused by pulling the twisted cable is reduced.