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 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:
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:
A string such as a bowstring or cable used in archery bows and crossbows include multiple strands. The multiple strands are not bound to each other but remain parallel and positioned side-by-side. The desired number of strands are laid up to a determined length and grouped together to create a bundle. The bundles can have different properties such as strength and stability depending on the direction the strands and bundles are twisted.
Abstract:
The present invention relates to a method of accomplishment of a hybrid cord comprising an inner layer (1) in steel cord, an intermediate layer (2) in a high module and high toughness fiber and an outer layer (3) in a Polyolefin fiber. The present invention also refers to its application in an 8 (4×2) cords braided hybrid cable or any other type of hybrid cable presenting another construction, in braided or twisted cables.
Abstract:
Multistrand metal cord of K×(L+M) construction, which can especially be used for reinforcing tire belts for industrial vehicles, consisting of K elementary strands assembled in a helix, with a helix pitch PK, each elementary strand: consisting of a cord (10) having two layers (Ci, Ce) of L+M construction, rubberized in situ, comprising an inner layer (Ci) consisting of L wires (11) of diameter d1, L varying from 1 to 4, and an outer layer (Ce) of M wires (12), M being equal to or greater than 5, of diameter d2, which are assembled in a helix with a pitch p2 around the inner layer (Ci); and having the following characteristics (d1, d2 and p2 being expressed in mm): 0.10
Abstract:
A steel cord (30) with a high elongation at break of at least 5% comprises n strands (20), each of said strands (20) has m filaments (10) twisted together, n ranges from 2 to 7. m ranges from 2 to 9. The strands and the filaments are twisted in a same direction. The lay length of the cord is Lc and the lay length of said strand is Ls. The ratio of Ls to Lc (Ls/Lc) ranges from 0.25 to 1. Lc ranges from 16 mm to 26 mm. The strands are helically preformed. The E-modulus of the cord is more than 150000 N/mm2. The helical preforming of the strands allows to obtain a high elongation at break and a high E-modulus despite its long lay length Lc.
Abstract:
A pneumatic tire for a passenger car includes a belt layer and a belt cover layer formed by winding a steel cord member in the tire circumference direction on the outer peripheral side of the belt layer. The steel cord member has a structure in which element wires made of steel and having a diameter smaller than 0.18 mm are twisted together to form each strand and the strands are twisted together in the same direction as the direction of twisting of the element wires. The twist pitch on each of the strands is smaller than the twist pitch on the steel cord member, the twist pitch on the strand is 1.0 mm to 2.1 mm, and the twist pitch on the steel cord member is 2.0 mm to 5.25 mm.
Abstract:
An annular metal cord includes an annular core portion and an outer layer portion. The annular core portion is formed by connecting together both ends of a first strand material which is made up of six twisted first metal filaments. The outer layer portion is formed by winding spirally a second strand material which is made up of six twisted second metal filaments around the annular core portion. The second strand material is wound at a predetermined winding angle relative to a center axis of the annular core portion, and a winding initiating end portion and a winding terminating end portion are connected together. As a result, the breaking strength of the annular metal cord can be made large, and the production thereof can be facilitated.