This steel cord comprises core filaments and an outer sheath filament disposed so as to surround the core filaments, wherein: the core filaments and the outer sheath filament have the same element wire diameter and the same twist pitch; and at least one of the core filaments is a corrugated filament which has a bent section and a non-bent section in the longitudinal direction thereof.
A filament according to the present invention including a plating film, in which: the plating film contains copper, zinc and cobalt; when the total of the content ratios of copper, zinc and cobalt in the plating film is 100% by mass, the content ratio of cobalt in the plating film is 0.5 to 8% by mass, inclusive; and, when three 1-square-μm observation areas each including the outer surface of the plating film are provided 10 mm away from one another along a center axis of the filament in a length-direction cross section of the filament which includes the center axis, the average value of the area ratios of cobalt in the observation areas is 1 to 50%, inclusive.
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
C25D 5/10 - Electroplating with more than one layer of the same or of different metals
C25D 5/50 - After-treatment of electroplated surfaces by heat-treatment
D06M 11/83 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising with metalsTreating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising with metal-generating compounds, e.g. metal carbonylsReduction of metal compounds on textiles
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
Provided is a steel cord having a 1 × n structure obtained by twisting n element wires together, wherein the number n of the element wires is 4 to 6 inclusive, and the element wires have an element wire diameter of 0.40 mm to 0.55 mm inclusive.
This steel wire has a flattened cross-section perpendicular to the longitudinal direction, and the outer profile of the cross-section has a first linear section, a second linear section disposed so as to face the first linear section, and a first curved section and a second curved section that connect the first linear section and the second linear section, the first curved section and the second curved section being disposed so as to face each other, and when W1 is the average value of the length of the first linear section and the length of the second linear section and W2 is the greatest distance between the first curved section and the second curved section, the ratio of W1 to W2 is no more than 75%.
This steel cord has a 1x4 structure in which four wires are twisted with each other, wherein: at least one of the four wires is a corrugated wire comprising repeated bent sections and non-bent sections along the longitudinal direction; cross-sections perpendicular to the longitudinal direction have a flat shape; and if ellipses circumscribing the four wires are drawn on a plurality of the cross-sections perpendicular to the longitudinal direction, the slopes of the short axes of the ellipses are within ± 30 degrees of the median value.
A plurality of belt layers 7 are superimposed in a radial direction. The belt layers 7 include a plurality of steel cords 10 arranged in parallel in a row and rubber 11. The steel cords 10 have a 1×4 structure in which four filaments 20 are twisted, and when a center-to-center distance between the steel cords 10 in at least two of the belt layers 7 adjacent in the radial direction is T, and an average diameter of virtual circumscribed circles of the steel cords 10 having the 1×4 structure is D, 1.25≤T/D≤2.25.
B60C 9/20 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
A steel cord having a two-layer twist structure provided with a core in which two or three core filaments are twisted together and one layer of an outer sheath in which outer sheath filaments are twisted together in a spiral shape along the longitudinal direction of the core around the core. The core filaments and the outer sheath filaments have the same filament diameter. The core and the outer sheath have the same twist pitch. The twist pitch/filament diameter ratio, which is the ratio between the twist pitch and the filament diameter, is 50-75 inclusive. Two or more filaments selected from among the core filaments and the outer sheath filaments are waved filaments repeatedly having bent parts and non-bent parts along the longitudinal direction.
There is provided a steel cord including a steel wire and a plating layer that covers the steel wire and has Cu, Zn, and Co, wherein Cu and Zn are alloyed and a region covered with Co and a region not covered with Co are mixed on the outermost surface of the plating layer.
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 3/12 - ElectroplatingBaths therefor from solutions of nickel or cobalt
C25D 3/22 - ElectroplatingBaths therefor from solutions of zinc
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
C25D 5/36 - Pretreatment of metallic surfaces to be electroplated of iron or steel
Provided is a tire in which a plurality of belt layers are overlapped in the radial direction. The belt layers have a plurality of steel cords and rubber which are arranged parallel in rows. The steel cords have a 1×4 structure in which 4 filaments are twisted together. The tire has a tensile stiffness×ends of 10,000-20,000 N/%, and an interface stiffness of 2.5-5.0 MPa.
B60C 9/20 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
The purpose of the present invention is to provide a tire that is lightweight and has outstanding riding comfort while suppressing increases in cost. In the present invention, a plurality of belt layers 7 are layered in the radial direction. Each of the belt layers 7 comprises a plurality of steel cords 10, disposed in parallel in a single line, and rubber 11. Each of the steel cords 10 has a one-by-four structure in which four filaments 20 are twisted together, and if the distance between the centers of the steel cords 10 in at least two belt layers 7 that are radially adjacent is T and the average diameter of virtual circumscribed circles of the one-by-four structure steel cords 10 is D, 1.25≤T/D≤2.25.
B60C 9/20 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
D07B 1/06 - Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
Provided is a steel cord provided with a steel wire and a plating layer having Cu, Zn, and Co for covering the steel wire, the Cu and Zn being alloyed, and areas covered by Co and areas not covered by Co coexisting on the topmost surface of the plating layer.
A tire having a rubber body in which a steel cord is embedded, wherein a layer comprising ZnxCoy is formed at the boundary of the steel cord and the rubber body, and x+y is 5/6 to 1 inclusive.
Provided are: a cable bead having a short manufacturing time and for which twisting unevenness is unlikely to occur; and a method for manufacturing the cable bead. Provided is a coreless ring-shaped cable bead (1), in which a single loop (7) of one deform strand member (2) that has been deformed so as to form a 1 x m1 x d1 single twist structure or a m2 x n x d2 multi-twist structure is wound into a spiral-shaped space into which (m1 - 1) or (m2 -1) deform strand members forming said structure are to be accommodated, and the strand member is wound m1 or m2 times.
One purpose of the present invention is to provide a metal wire for rubber reinforcement that exhibits excellent wire drawability and adhesion with rubber compositions. The aforementioned issue is resolved by a metal wire for rubber reinforcement characterized by having a metal core wire, and a coating layer that covers the metal core wire and comprises Cu, Zn and Co, and by the composition of the surface layer of the coating layer from the surface to a depth of 15nm inwards in the radial direction being 60at% to less than 69at% of Cu and 0.5at%-5.0at% of Co.
B32B 15/02 - Layered products essentially comprising metal in a form other than a sheet, e.g. wire, particles
B32B 15/06 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of rubber
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
C25D 5/26 - Electroplating of metal surfaces to which a coating cannot readily be applied of iron or steel surfaces
C25D 5/50 - After-treatment of electroplated surfaces by heat-treatment
17.
ELECTRODEPOSITION LIQUID FOR FIXED-ABRASIVE SAW WIRE
Provided is an electrodeposition liquid for saw wires, said electrodeposition liquid being capable of producing a saw wire, to which a large amount of abrasive grains are adhered, at high speed. This electrodeposition liquid for saw wires is characterized by containing 100 parts by mass to 10,000 parts by mass (inclusive) of abrasive grains and 50 parts by mass to 100 parts by mass (inclusive) of colloidal particles of titanium oxide and/or zirconium oxide and by having an electrical conductivity of less than 10 mS/cm.
B24D 11/00 - Constructional features of flexible abrasive materialsSpecial features in the manufacture of such materials
B24D 3/02 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
B24D 3/06 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic
C25D 15/00 - Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
18.
METAL WIRE HAVING ABRASIVE GRAINS BONDED THERETO AND METHOD FOR MANUFACTURING METAL WIRE HAVING ABRASIVE GRAINS BONDED THERETO
Provided is a high-speed method for manufacturing a metal wire having abrasive grains bonded thereto. A metal core is immersed in an electrodeposition liquid containing abrasive grains and colloid particles of a metal oxide; and a voltage of a polarity different from that of the colloid particles is applied to the metal core, so that the abrasive grains are caused to adhere, along with the colloid particles, to the metal core.
B24D 11/00 - Constructional features of flexible abrasive materialsSpecial features in the manufacture of such materials
B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents
19.
ANNULAR METALLIC CORD, ENDLESS METALLIC BELT, AND PROCESS FOR PRODUCING ANNULAR METALLIC CORD
An annular metallic cord in which the twisted state does not get loose and the wound shape can be maintained even when the cord undergoes successive repetitions of a load; an endless metallic belt; and a process for producing an annular metallic cord. The annular metallic cord (C1) is one obtained by untwisting a metallic cord (20) comprising a plurality of twisted strands (1, 2), dividing the strands into two groups of wires which differ in total sectional area, the group of strands (1) with a larger total sectional area being a reuse wire group (3) and the group of strands (2) with a smaller total sectional area being a nonuse wire group (4), and while looping one strand out of the reuse wire group (3) so as to make multiple laps, winding the remaining part (1e) by fitting the remaining part (1e) into the spiral hollow (5) of the annular part (1d) formed by the looping, the spiral hollow (5) being attributable to the nonuse of both the other strands (1) of the reuse wire group (3) and the nonuse wire group (4).
Provided is an annular metal cord wherein a continuously repeated load does not cause any loosening of strands and the wound shape can be maintained, and also provided is an endless metal belt and a method of producing an annular metal cord. An annular metal cord (C1) is configured in such a manner that one strand material (1) unstranded from a metal cord, where a plurality of strand materials (1) are stranded with a set-height/diameter ratio of 92-112% to surround the center including no core material, is made in an annular shape having the number of laps more than that of the metal cord by one lap, and is wound annularly while fitting the extra length in the spiral gap from where other strand materials are removed.
An annular, concentrically twisted bead cord is provided which can be reduced in weight while ensuring strength. Also provided are: a process for producing the bead cord; and a vehicle tire. The process for producing an annular, concentrically twisted bead cord (2) includes spirally winding side wires (12) around an annular core (11) to form a sheath layer (13). After the sheath layer (13) has been formed, the side wires (12) are set in an inert-gas-atmosphere having a reduced pressure by annealing using a quantity of heat exceeding the quantity of heating (temperature × time) which is necessary for vulcanization in tire molding after cord embedding in the rubber of a vehicle tire (1). This setting is conducted so that the set-height/diameter ratio (%), which is H/D×100, is 20-105%.
Provided are an annular concentrically-twisted bead cord, which is reduced in weight while retaining satisfactory manufacturing and handling properties, and a vehicular tire employing the bead cord. The annular concentrically-twisted bead cord (2) has a sheath layer (13) formed by winding side wires (12) helically around a metallic annular core (11). The side wires (12) are constituted by wrapping a pair of steel wires (22) around a side wire body (21) made of aramid fibers.
A connection method and a connection device of a metal linear element capable of firmly connecting metal linear elements easily and inexpensively. A connection method for connecting opposing metal linear elements (1) to each other in which a pair of second spur gears (41a, 41b) each having an insertion hole and a slit capable of holding a metal linear element (1) and formed at an interval are disposed at an interval, the insertion holes and the slits of these second spur gears (41a, 41b) are allowed to hold portions in the vicinities of the end portions (1a) of respective metal linear elements (1) that are stretched with the portions in the vicinities of end portions (1a) of the metal linear elements (1) kept overlapped in the axial direction, and the second spur gears (41a, 41b) are relatively rotated in opposite directions with the portions between the insertion holes and the slits as the centers of rotation, whereby the metal linear elements (1) are twisted and connected together between these second spur gears (41a, 41b) with a spacer (45) restricting the movement to the radial outside.
B21F 15/04 - Connecting wire to wire or other metallic material or objectsConnecting parts by means of wire wire with wire without additional connecting elements or material, e.g. by twisting
24.
ANNULAR METAL CORD, ENDLESS METAL BELT, AND METHOD OF PRODUCING ANNULAR METAL CORD
Provided are an annular metal cord having high breaking strength and capable of being easily produced, an endless metal belt, and a method of producing an annular metal cord. The annular metal cord (C1) is formed by annular core section (3) and an outer layer section (4) multiply helically wrapped around the annular core section (3) and covering the outer periphery of the annular core section (3). The annular core section (3) is formed in an annular shape by first and second strand members (1, 2) formed by twisting multiple metal wires (5, 6) together. An adhesion material for coating is applied and solidified around the annular metal cord(C1) to cover its periphery by an outer layer coating (10) formed from the elastic coating material.
It is possible to provide an annular metal cord an endless metal belt which have an excellent rupture strength and which can be easily manufactured, and a method for manufacturing the annular metal cord. The annular metal cord (C1) is prepared as follows. Six metal wires (5) are twisted into a strand (1), which is wound with a predetermined annular diameter. The start point and the end point of the strand is temporarily fixed to form an annular core (3). The strand (1) continuous from the annular core (3) is helically wound on the annular core (3) six laps so as to form an external layer (4) covering the external surface of the annular core (3). After this, the start point and the end point of the strand (1) are bonded by a connection member (7).
In producing a wire for bead cords, a steel wire is first descaled. Subsequently, the steel wire descaled is subjected to a chemical conversion coating treatment by electrolysis to form a phosphate coating film on the steel wire. This steel wire, which has undergone chemical conversion treatment, is subjected to dry drawing and then to wet drawing as finish drawing to obtain a wire for bead cords. The drawing operations are conducted so that the zinc phosphate coating film, which has corrosion resistance, remains on the surface of the wire for bead cords.
A bead cord (9) has an annular core (10) and a single line of side wire (11) spirally wound for multiple times in one layer around the annular core (10). The annular core (10) is formed by a twisted wire (13) formed by two core wires (12) twisted together. The core wires (12) have the same diameter. Both end surfaces of the core wire (12) forming the annular core (10) are joined by welding. The direction of winding of the side wire (11) relative to the annular core (10) is preferably opposite the direction of twisting of the core wires (12).
Disclosed is a steel wire for spring which is obtained by drawing a steel wire which is coated with a phosphate at a coating amount of 3.0-5.5 g/m2. When the surface roughness of the steel wire for spring is represented by R and the wire diameter is represented by d, the value of R/d is within the range from 1.06 × 10-3 to 3.92 × 10-3.
An easy-to-produce annular metal cord exhibiting excellent break strength and an endless metal belt are provided. The annular metal cord has an annular core portion (3) and an outer layer portion (4). The annular core portion (3) is formed by bonding the opposite ends of a first strand material (1) consisting of six stranded first metal wires (5). The outer layer portion (4) is formed by winding a second strand material (2) consisting of six stranded second metal wires (6) six turns spirally around the annular core portion (3). The second strand material (2) is wound at a predetermined winding angle with respect to the central axis of the annular core portion (3), wherein the start-of-winding portion and the end-of-winding portion are coupled. Since six second strand materials (2) are not wound but the second strand material (2) are wound six turns, only one second strand material is required and the second strand material is coupled at only one position. Consequently, break strength of the annular metal cord can be enhanced while production is facilitated.
patents
