Abstract:
A compact steel cord is provided. The cord includes a core-filament I steel wire with a diameter of d0, and four middle-layer M steel wires with a diameter of d1 and eight outer-layer O steel wires with a diameter of d2 that are twisted around the core-filament I steel wire in the same lay direction and the same lay length. Gaps L are reserved between the outer-layer O steel wires, an average width of the gaps L is not smaller than 0.02 mm, and the total size of the gaps L is larger than d0 and smaller than d1. The steel cord of a stable structure can be obtained by controlling the proportion of the sizes of all layers of monofilaments, the rubber coating performance of a tire cord can also be improved, the corrosion resistance, fatigue resistance, impact resistance and adhesion retention of a tire are improved.
Abstract:
A steel cord for reinforcement of rubber articles, whose cord strength is enhanced by preventing occurrence of preceding break of the outermost layer filaments in the steel cord having a multi-twisted structure, and a pneumatic tire using it as a reinforcing material are provided.In a steel cord for reinforcement of rubber articles having a multi-twisted structure in which a plurality of strands are twisted together, which strands have a layered twisted structure in which a plurality of steel filaments are twisted together, dc/ds, which represents the ratio between dc, the diameter of outermost layer sheath filaments constituting the outermost layer sheath of a core strand, and ds, the diameter of outermost layer sheath filaments constituting the outermost layer sheath of sheath strands, is 1.05 to 1.25.
Abstract:
A sling for industrial lifting comprising a cover having fibers twisted in a first direction; and a load-bearing core within the cover, the core having a helical twist of a plurality of core strands, each core strand twisted in a second direction.
Abstract:
One aspect of this invention concerns a multi-strand steel wire rope (28, 32, 36, 46, 50) comprising multiple strands (3, 10, 38) laid up helically on a core (30, 34,), characterised in that at least some of the strands are deep strands (10, 38), i.e. strands with a heightwidth ratio greater than unity. Another aspect of the invention concerns the deep strand (10, 38) itself.
Abstract:
Metal cord for use in reinforcing fabric for articles made from rubber, such as pneumatic tires, conveyor belts, flexible tubes, and similar, comprising a plurality of such metal cords orientated parallel to each other in a single direction and in which each cord comprises metal wires wound spirally around each other, wherein at least one of the wires of the cord consists of a shape memory material. During the phase of incorporation of the cords into the elastomeric material, the shape memory wire tends to recover the shape memorized initially and, by means of the force generated during this recovery, transmits by friction to the surrounding wires forces tending to shorten the pitch of the cord with spacing of each wire from the next, resulting in good penetration of elastomeric material between the wires. The closure of the cord is maintained in the subsequent heat cycles, owing to the memory degradation characteristics imparted to the wire. The invention is particularly suitable for fabrics forming belt layers and casing plies in pneumatic tires.
Abstract:
Process for the manufacture of a reinforcing fabric for articles made from rubber, such as pneumatic tires, conveyor belts, flexible tubes, and similar, comprising a plurality of metal cords orientated parallel to each other in a single direction and in which each cord comprises metal wires wound spirally around each other, wherein at least one of the wires of the cord consists of a shape memory material. During the phase of incorporation of the cords into the elastomeric material, the shape memory wire tends to recover the shape memorized initially and, by means of the force generated during this recovery, transmits by friction to the surrounding wires forces tending to shorten the pitch of the cord with spacing of each wire from the next, resulting in good penetration of elastomeric material between the wires. The closure of the cord is maintained in the subsequent heat cycles, owing to the memory degradation characteristics imparted to the wire. The invention is particularly suitable for fabrics forming belt layers and casing plies in pneumatic tires.
Abstract:
Le procédé permet la fabrication d'un câble multitorons (46) de structure 1xN comprenant une unique couche (48) de N torons (50) enroulés en hélice. Chaque toron (50) comprend une couche interne (52) de M fils internes (54) et une couche externe (56) de P fils externes (58). Le procédé comprend: - une étape d'assemblage individuel de chacun des N torons (50) au cours de laquelle, et dans l'ordre chronologique: - on enroule les M fils internes (54), - on enroule les P fils externes (58), et - on allonge les M fils internes et les P fils externes (58) de sorte que l'allongement structurel associé aux P fils externes (58) de chaque toron (50) est supérieur ou égal à 0,05%, - une étape d'assemblage collectif des N torons (50) au cours de laquelle on enroule les N torons (50) pour former le câble (46).
Abstract:
One aspect of this invention concerns a multi-strand steel wire rope (28, 32, 36, 46, 50) comprising multiple strands (3, 10, 38) laid up helically on a core (30, 34, ), characterised in that at least some of the strands are deep strands (10, 38), i.e. strands with a heightwidth ratio greater than unity. Another aspect of the invention concerns the deep strand (10, 38) itself.
Abstract:
L'invention a pour objet un câble multi-torons (60) à deux couches comprenant une couche interne (Cl) du câble constituée de J>1 torons internes (Tl) et une couche externe (CE) du câble constituée de L>1 torons externes (TE). Le câble satisfait la relation 95 4 (α) x [Q x (D1 / 2) 2 x cos 4 (β) + N x (D2 / 2) 2 x COS 4 (Y)] / [Q x (D1 / 2) 2 + N x (D2 / 2) 2 ] - ME = 200 x cos 4 (α') x [Q' x (D1 ' / 2) 2 x cos 4 (β') + P' x (D2' / 2) 2 x cos 4 (δ') + N' x (D3' / 2) 2 x COS 4 (Y')] / [Q' x (D1 ' / 2) 2 + P' x (D2 / 2) 2 + N' x (D3' / 2) 2 ] avec D1, D1 ', D2, D2', D3' en mm, a et a' l'angle d'hélice de chaque toron interne et externe (Tl), β et β' l'angle d'hélice de chaque fil interne (F1, F1 '), δ ' l'angle d'hélice de chaque fil intermédiaire (F2') et γ et γ' l'angle d'hélice de chaque fil externe (F2, F3').
Abstract:
A sling for industrial lifting made of a load-bearing core (1) and a cover (2). The cover (2) protects the plurality of yarns (3) that make-up the core (1). Each core yarn (3) is made of a number of core threads (4) twisted together. The core yarns (3) are twisted together where the twist is in the. same direction as the individual core strands and a different direction than the twist of the cover (2). The present invention describes the method of twisting the core yarns (3) together by inserting core yarns (3) substantially parallel into a cover (2) that has a twist opposite of each core strand. As the core strands are inserted into the cover (2), the twists of the individual core yarns (3) interact with the twist of the cover (2), resulting in the core yarns (3) twisting together.