Abstract:
A steel cord for a tire reinforcement having a non-circular cross-section includes: a lower strand; and an upper strand that surrounds an outer circumferential surface of the lower strand so as to have an m+n structure, wherein the lower strand includes a plurality of core wires, each of the plurality of core wires have a flat surface on a portion in which the plurality of the core wires come into contact with each other, and the plurality of core wires come into surface contact with each other through the flat surface.
Abstract:
The invention relates to a traction rope (1) comprising a one-piece core (2) comprising a central kernel (4) provided on its periphery with a set of regularly spaced fins (5) that form between one another receiving grooves (6) having an at least partially circular section, and strands (3) disposed around the core (2) by insertion into each of the receiving grooves (6), such that the combination of the core and the strands (3) has an outer envelope with a substantially cylindrical shape, the strands (3) being embedded in the receiving grooves (6) without otherwise making the fins (5) that separate them creep. The invention also relates to a one-piece core (2, 7) for a traction rope and also to the use of this rope (1) purely as a traction rope or as a carrying-hauling rope.
Abstract:
With respect to a steel cord obtained by twining one layer of sheath filament of steel with uneven distribution around multiple core filaments of steel parallelly drawn together in nontwined form, it is intended to attain an enhancement of rubber penetration (satisfactory adhesion of rubber to core filaments) through securing of interstices between filaments at the time of vulcanization. The sectional major axis diameters of steel cord (10) are set larger than the minimum sectional major axis. Accordingly, when a steel cord is coated with rubber (16) and vulcanized, interstices (A) are secured between individual sheath filaments (14) even if tension and, from surrounding rubber, pressure (p) apply to the steel cord. As the rubber (16) enters through the interstices, satisfactory adhesion of the rubber (16) to core filaments (12) would be realized, thereby ensuring high rubber penetration.
Abstract:
A wire cable (3) for window regulators of automobiles is disclosed. In the wire cable (3), the core strand (31) has a double-layer twisted strand structure with an F+6+12 element wire structure, and consists of a high-strength synthetic resin filament (31A) used as a core element wire (F), six internal element wires (31B) primarily twisted around the core element wire to form an internal layer around the core element wire, and twelve external element wires (31C) secondarily twisted around the internal layer to form an external layer around the internal layer. Eight external strands (32), having a single-layer twisted strand structure with a 1+6 element wire structure, are twisted around the core strand to form an 8x7+(F+6+12) element wire structure of the wire cable (3) in cooperation with the core strand (31). The synthetic resin filament (31A) used as the core element wire of the core strand (31) has a diameter slightly larger than that of the internal and external element wires (31B,31C) of the core strand (31). The core strand (31) is also compressed at a compression ration of 2 ∼ 10%, thus bringing its element wires (31B,31C) into surface contact with each other in place of point contact. In this wire cable (3), the element wires (31B,31C) of the core strand (31) are not likely to be deformed or broken, thus being improved in its fatigue resistance against a repeated bending action, in addition to improving the productivity of the wire cables.
Abstract:
A wire rope (1) includes metallic reinforcing members (4) of substantially triangular cross section, each having an apex located between adjacent strands (3) and continuously aligned with them. The member (4) may be a triangular wire, a triangular plaited arrangement of wires, or a triangular strand, for example.
Abstract:
A process for producing a steel cord for pneumatic tyres with a bunch of wires, the core of which consists of wire filaments (10) arranged in a bunch parallel and adjacent to one another. There are advantageously at least three wire filaments (10, 20), where at least two wire filaments (10) are spirally wound as filaments (10) forming a core (60) and run parallel and beside each other and at least one wire filament is spirally wound around the two core filaments (10) as the wrapping wire (20). According to the invention, the spiral deformation of the wire filaments (10) is obtained by false twisters (40). This spiral deformation of the wire filaments (10) especially prevents migration of the filaments from the cord composite. It is an advantage if residual torsional stresses between the core filaments and in connection with the restoring forces of the wrapping wire are relieved. The steel cord also advantageously has a flattened, especially oval, shape.
Abstract:
A flexible intravascular guidewire comprises a plurality of filaments braided together and drawn through a die to a reduced cross-sectional area of circular shape. Preferably, one or more of the filaments is coated with a radiopaque material prior to drawing it through the die. According to a preferred embodiment, each of the filaments is made from the same metallic material; alternatively, the filament material may differ, e.g., to provide flexibility and torsional stiffness characteristics which are unachievable in a metal monofilament, or in a multifilament wire of the same filament materials.
Abstract:
The present invention is concerned with a compacted substantially triangular strand suitable for making wire ropes therefrom. The method for producing the novel compacted substantially triangular strand is also disclosed. The method includes covering a substantially triangular central group (10) with a first layer of from 7-12 wires (17), followed by the covering of the thus obtained strand with a second layer of from 10-15 wires (21) before passing the strand through a rotating substantially triangular die (24) to provide a compacted substantially triangular strand.