Abstract:
A method is provided for making metal cords to be used as reinforcing elements in elastomeric structures which comprises arranging the wires in groups with the wires of each group being arranged coplanar and side by side, permanently deforming the wires by bending to wind the wires in a regular and uniform helical arrangement, with the helexes of all the wires having the same geometrical characteristics. The resulting cord is free from residual tensions which might loosen the mutual strand.
Abstract:
L'installation (10) permet la fabrication d'au moins des premier et deuxième assemblages (26, 28) de M1 éléments filaires et M2 éléments filaires comprenant plusieurs des éléments filaires (14) enroulés ensemble en hélice. L'installation (10) comprend : des moyens (18) d'assemblage de M éléments filaires (14, 17) ensemble en une couche de M éléments filaires (17) autour d'un noyau transitoire (16) pour former un assemblage transitoire (22), et des moyens (24) de fractionnement de l'assemblage transitoire (22) en au moins les premier et deuxième assemblages (26, 28) de M1 éléments filaires et M2 éléments filaires.
Abstract:
A steel cord (10) adapted for the reinforcement of elastomeric products comprises a core strand (12) and a layer of outer strands (14) arranged around the core strand (12). The core strand (12) comprises a core and at least a layer arranged around the core. The core further comprises one to three core filaments and the layer further comprises three to nine layer filaments. The core strand (12) has a first wave form and each filament of the outer strands (14) has a second wave form such that the first wave form is substantially different from the second wave form. This allows to guarantee full rubber penetration.
Abstract:
A steel cord (10) adapted for the reinforcement of rubber products, the steel cord (10) comprises a core (12) and three or more outer strands (14) twisted around the core (12) in a cord twisting direction. The outer strands (14) comprise outer filaments (16) twisted in a strand twisting direction which is the same as the cord twisting direction. The outer strands (14) have a wavy form which makes spaces between the core (12) and the outer strands. The steel cord (10) has improvements on elongation at break and impact resistance capacity.
Abstract:
There are provided an annular concentric stranded bead cord which can realize a reduction in weight while ensuring its strength, a method for manufacturing the same and a vehicle tire.The manufacturing method is a method for manufacturing an annular concentric stranded bead cord by forming a sheath layer by winding spirally a lateral wire round an annular core. After the sheath layer has been formed, the lateral wire is annealed in a pressure-reduced inactive gaseous atmosphere with an annealing quantity which exceeds a heating quantity (temperature×time) which is necessary for vulcanization of a vehicle tire with the annular concentric stranded bead cord embedded in a rubber of the vehicle tire when building the same and is shaped so that “Diameter shaping ratio (%)=H/D×100” becomes 20% or larger and 105% or smaller.
Abstract translation:提供了一种环形同心绞合胎圈帘线,其可以在确保其强度的同时实现重量的减轻,其制造方法和车辆轮胎。 制造方法是通过围绕环形芯螺旋地缠绕侧线而形成护套层来制造环形同心绞合胎圈帘线的方法。 在形成护套层之后,将侧线在减压惰性气体气氛中退火,其退火量超过用环形同心绞线珠子对车辆轮胎硫化所需的加热量(温度×时间) 帘线嵌入车轮胎的橡胶中,并且成形为“直径成形率(%)= H / D×100”变为20%以上且105%以下。
Abstract:
A steel cord that is especially useful for reinforcing a crown portion of a tire is provided. In particular, a steel cord free from manufacturing problems existed in the conventional art and allowing for stable quality and good production efficiency is provided, and a rubber-steel cord composite and a tire that are equipped with the same are provided.A steel cord has a multiple-twist structure including N (N=2 to 8) strands 2 that are twisted together, each strand 2 having a plurality of wires 1 that are twisted together. When the diameter of each strand is denoted by d (mm), the diameter of a circle circumscribing the cord is denoted by D (mm), and the twisting pitch of the cord is denoted by P (mm), εc defined by the following expression, εc=√(−b/2+√(b2/4−c))−1 (where b denotes −1+π2(−4R2+d2)/P2, c denotes π2d2k(4π2R2+P2)/P4, R denotes (D−d)/2, and k denotes tan2(π/2−π/N)), satisfies εc≧0.005.