WO2015173143A1 - Câble d'acier à multiples torons - Google Patents

Câble d'acier à multiples torons Download PDF

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Publication number
WO2015173143A1
WO2015173143A1 PCT/EP2015/060206 EP2015060206W WO2015173143A1 WO 2015173143 A1 WO2015173143 A1 WO 2015173143A1 EP 2015060206 W EP2015060206 W EP 2015060206W WO 2015173143 A1 WO2015173143 A1 WO 2015173143A1
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WO
WIPO (PCT)
Prior art keywords
filaments
central
strands
core
layer
Prior art date
Application number
PCT/EP2015/060206
Other languages
English (en)
Inventor
Roel DESPIEGELAERE
Dirk Meersschaut
Jef Wilmots
Original Assignee
Nv Bekaert Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nv Bekaert Sa filed Critical Nv Bekaert Sa
Priority to CN201580024668.2A priority Critical patent/CN106460320A/zh
Publication of WO2015173143A1 publication Critical patent/WO2015173143A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D07B1/0626—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
    • D07B1/0653—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires in the core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2007—Wires or filaments characterised by their longitudinal shape
    • D07B2201/2008—Wires or filaments characterised by their longitudinal shape wavy or undulated
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/201—Wires or filaments characterised by a coating
    • D07B2201/2011—Wires or filaments characterised by a coating comprising metals
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2021—Strands characterised by their longitudinal shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2046—Strands comprising fillers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2062—Cores characterised by their structure comprising wires comprising fillers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2065—Cores characterised by their structure comprising a coating
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2075—Fillers
    • D07B2201/2079—Fillers characterised by the kind or amount of filling
    • D07B2201/2081—Fillers characterised by the kind or amount of filling having maximum filling
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3071—Zinc (Zn)
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3085—Alloys, i.e. non ferrous
    • D07B2205/3089—Brass, i.e. copper (Cu) and zinc (Zn) alloys
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3085—Alloys, i.e. non ferrous
    • D07B2205/3092—Zinc (Zn) and tin (Sn) alloys
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/208—Enabling filler penetration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2046—Tire cords

Definitions

  • the invention relates to multi-strand steel cords, and more particularly to multi-strand steel cords adapted to be used to reinforce rubber articles, in particular rubber tires, such as truck, passenger or off-the road tires, rubber tracks or belts.
  • the cords according to the present invention are in particular suitable for the reinforcement of off-the-road tires.
  • the invention further relates to a method of manufacturing multi-strand steel cords.
  • Rubber penetration can be influenced by proper constructional features of the cord, for example by providing free spaces between individual filaments of the cord.
  • rubber penetration is difficult for multi-strand cords.
  • a multi-strand steel cord comprises a plurality of strands of twisted filaments, whereby the strands are further twisted in a so-called multiple twisting structure.
  • a multi-strand cord comprises a high number of filaments and a
  • in-situ rubberized strands is meant strands that are coated on the inside during the manufacturing by applying rubber or a rubber compound in the uncrosslinked (green) state, before the cords are incorporated into rubber articles, such as tires, which they are intended to reinforce.
  • US2002/160213 describes a method of manufacturing a cord whereby the core filaments are individually coated with uncured rubber before being stranded in a core. Subsequently the core is stranded with outer filaments around the core. Such method leads however to the use of an excessively large amount of rubber. The overspill of rubber at the periphery of the final strand is unacceptable. This results not only in a waste of rubber material but causes also problems in the manufacturing process, for example during cabling or winding because of the undesirable adhesion of the uncured rubber for example with manufacturing tools or between strands.
  • a multi-strand steel cord is provided.
  • the multi-strand steel cord comprises J central strands and K outer strands.
  • the K outer strands are positioned around the J central strands.
  • the K outer strands are helically twisted around the J central strands.
  • the number of central strands J is higher than or equal to 1.
  • the number of outer strands K is higher than or equal to 3.
  • the number of central strands J ranges preferably from 1 to 3.
  • the number of outer strands K ranges preferably from 5 to 9 and is for example 5, 6, 7, 8 or 9.
  • Each strand of the multi-stand cord either a central strand or an outer strand, comprises a core and a number of filaments positioned around this core of filaments.
  • the filaments positioned around the core are twisted around the core of filaments.
  • the core comprises one filament or a number of filaments that are twisted together.
  • the number of filaments of a core ranges preferably from 1 to 5, and is for example equal to 1 , 2 or 3.
  • the filaments positioned around the core of filaments are for example arranged in a layer positioned around the core. Possibly, the filaments positioned around the core of filaments are arranged in a number of layers, for example in a first and a second layer whereby the first layer is positioned around the core of filaments and the second layer is positioned around the first layer.
  • the core of a strand has a circumferential surface.
  • the circumferential surface of the core of a strand is defined as the outer surface of the core formed by the central filaments.
  • the strands have a circumferential surface.
  • the circumferential surface of a strand is defined as the outer surface of the strand, i.e. the core surrounded by the filaments, for example the filaments of the first layer or the filaments of the first and the second layer.
  • the J central strand or central strands comprise(s) a core of L central filaments and a first layer of M filaments positioned around the core of L central filaments, with 1 ⁇ L ⁇ 5 and 4 ⁇ M ⁇ 20. More preferably, M ranges between 6 and 15. Examples comprise strands having a core of 1 central filament L and a first layer of 6 filaments M or strands having a core of 3 central filaments L and a first layer of 9 filaments M.
  • the J central strand or central strands comprise(s) a core of L central filaments, a first layer of M filaments positioned around the core of L central filaments and a second layer of N filaments positioned around the first layer of M filaments, with 1 ⁇ L ⁇ 5 and 4 ⁇ M ⁇ 20 and 4 ⁇ N ⁇ 20. More preferably L, M and N are specified as follow : 1 ⁇ L ⁇ 5, 4 ⁇ M ⁇ 10 and 4 ⁇ N ⁇ 20, for example 1 ⁇ L ⁇ 3 and 4 ⁇ M ⁇ 9 and 6 ⁇ N ⁇ 15.
  • Examples comprise strands having a core of 1 central filament L, a first layer of 6 filaments M and a second layer of 12 filaments N, strands having a core of 3 central filaments M, a first layer of 9 filaments M and a second layer of 15 filaments N or strands having a core of 3 central filaments M, a first layer of 8 filaments M and a second layer of 14 filaments N.
  • the K outer strands comprise a core of P
  • the K outer strands comprise a core of P central filaments, a first layer of Q filaments positioned around the core of P central filaments and a second layer of R filaments positioned around the first layer of M filaments, with 1 ⁇ P ⁇ 5 and 4 ⁇ Q ⁇ 20 and 4 ⁇ R ⁇ 20. More preferably P, Q and R are specified as follow : 1 ⁇ L ⁇ 5, 4 ⁇ M ⁇ 10 and 4 ⁇ N ⁇ 20, for example 1 ⁇ P ⁇ 3 and 4 ⁇ Q ⁇ 9 and 6 ⁇ R ⁇ 15.
  • Examples comprise strands having a core of 1 central filament P, a first layer of 6 filaments Q, a second layer of 12 filaments R, strands having a core of 3 central filaments P, a first layer of 9 filaments Q and a second layer of 15 filaments R or strands having a core of 3 central filaments P, a first layer of 8 filaments Q and a second layer of 14 filaments R.
  • a multi-strand cord according to the present invention is characterized in that
  • the K outer strands are free or substantially free of polymer material.
  • polymer material is also present between the L central filaments of the core of the J central strands. More preferably, the voids created between the L central filaments of the core of the J central strands are completely filled with polymer material.
  • the first layer of M filaments as well as the second layer of N filaments in the central strand remain free or substantially free of polymer material. This limits the amount of extrusion steps further as well as reduces the amount of polymer material that is introduced.
  • the fact that the surface of the central strand is free or substantially free of polymer material greatly eases the use of the central strand in the further fabrication of the steel cord.
  • the polymer material is preferably applied by extrusion, for example on the L central filaments of the J central strands, on the core of the J central strands or both on the L central filaments of the J central strands and on the core of the J central strands.
  • the K outer strands are free or substantially free of polymer material. This means that the P central filaments of the core of said K outer strands and the filaments of said K outer strands positioned around the core of P central filaments (Q and R filaments) are free or substantially free of polymer material.
  • the circumferential surface of the core or P central filaments of the K outer strands is free or substantially free of polymer material. Furthermore it is clear that also the circumferential surface of the K outer strands is free or substantially free of polymer material.
  • the filaments are preferably made of steel.
  • the filaments are made from plain carbon steel.
  • Such a steel preferably comprises a minimum carbon content of 0.40wt% C (for example at least 0.70 wt% C or at least 0.80wt% C) with a maximum of 1.1 wt% C, a manganese content ranging from 0.10 to 0.90 wt% Mn, the sulphur and phosphorus contents are each preferably kept below 0.030 wt%.
  • Additional alloying elements such as chromium boron, cobalt, nickel, vanadium -a non-exhaustive enumeration- may also be added.
  • the filaments are made from stainless steel.
  • Stainless steels contain a minimum of 12wt%Cr and a substantial amount of nickel. More preferred stainless steel composition comprise are austenitic stainless steels. The most preferred compositions are known in the art as AISI (American Iron and Steel Institute) 302, AISI 301 , AISI 304 and AISI 316.
  • AISI American Iron and Steel Institute
  • the filaments have a diameter preferably ranging between 0.04 mm and
  • the filaments have a diameter ranging between 0.15 and 0.6 mm, for example 0.15 mm, 0.175 mm and 0.35 mm.
  • the different filaments of a strand or a cord may have the same diameter although this is not necessary.
  • the filaments have preferably a tensile strength larger than 2000 N/mm 2 , more preferably larger than 2500 N/mm 2 .
  • the filaments are obtained in a conventional drawing process.
  • the filaments and/or the strands can be uncoated or they can be coated with a suitable coating.
  • Preferred coatings are for example zinc or zinc alloy coatings such as zinc coatings, brass coatings, brass based coatings, zinc aluminium coatings or zinc aluminium magnesium coatings.
  • Preferred brass based coatings are ternary or quaternary brass based coating, i.e. coatings comprising copper and zinc and one or two additional metals.
  • the additional metal is for example cobalt (Co) or nickel (Ni). Also iron (Fe), tin (Sn), manganese (Mn), indium (In), bismuth (Bi), and
  • a preferred quaternary brass based coating comprises a Cu-Zn-Ni-Co alloy.
  • the zinc or zinc alloy coating is for example applied in a conventional galvanizing process.
  • the polymer material can be any type of polymer material, for example any elastomer or rubber.
  • elastomer and “rubber” are interchangeable.
  • examples of polymer material comprise natural rubbers, polyisoprene, polybutadiene, butadiene copolymers, isoprene copolymers and blends of one or more of these elastomers.
  • butadiene-styrene copolymers isoprene-styrene copolymers, isoprene- butadiene-styrene copolymers.
  • the polymer material is preferably crosslinkable, that is to say it
  • the polymer material may further comprise one or more additives for example additives that are known additives used in rubbers.
  • additives comprise organic reinforcing fillers such as carbon black or inorganic fillers such as silica, coupling agents, anti-ageing agents, antioxidants, plasticizers, tackifying resins, antireversion agents, adhesion promoting agents.
  • the formulation of the polymer material present in the central strand may be chosen to be similar or even identical to the formulation of the polymer material of the article the multi-strand cord according to the present invention is intended to reinforce. In such case, there is no compatibility problem between the polymer material in the cord and the polymer material of the article to be reinforced.
  • a multi-strand steel cord according to the present invention has the
  • the cord comprises only a minimum amount of polymer material and nevertheless allows to obtain good rubber penetration after vulcanisation.
  • the P central filaments of the core of the K outer strands are preformed.
  • preforming the rubber penetration in the K outer strands more particularly into the core of the K outer strands is increased.
  • 'preformed' or 'preforming operation' on an element is meant':
  • the wave forming can be applied by guiding the element through a pair of intermeshing crimper wheels, or;
  • Such preforming is obtained by combining the bending operation obtained by guiding the element under tension over a polygonal performer wheel followed with a rotation of the element.
  • At least one and preferably all of the K outer strands are preformed.
  • strands are preformed and subsequently once the strand is formed, the outer strands are preformed.
  • the method comprises the following steps
  • J strands with J > 1 , said J strands comprising a core of L central filaments and at least one layer of M filaments positioned around said core of L central filaments; with 1 ⁇ L ⁇ 5 and 4 ⁇ M ⁇ 20, the circumferential surface of said core of L filaments being coated with a polymer material;
  • K strands with K > 3, said K outer strands comprising a core of P central filaments and at least one layer of Q filaments positioned around said core of P central filaments, with 1 ⁇ P ⁇ 5 and 4 ⁇ Q ⁇ 20, said P central filaments and said Q outer filaments being free of substantially free of polymer material;
  • the J central strand or strands may comprise one layer of filaments
  • the J central strand or strands comprise(s) a first layer comprising M filaments positioned around the core of L central filaments and a second layer comprising N filaments positioned around the first layer of filaments.
  • the K outer strands may comprise one layer of filaments
  • the K outer strands comprise a first layer comprising M filaments positioned around the core of L central filaments and a second layer comprising N filaments positioned around the first layer of filaments.
  • the circumferential surface of said J central strands is
  • a central strand J is for example obtained by
  • An alternative method to manufacture a central strand J comprises the steps of
  • the strand or strands comprise(s) two layers of filaments around the core of central filaments, the strand or strands is/are
  • the K outer strands can be manufactured by a known method.
  • filaments of the K strands either the P central filaments of the core or the Q filaments do not comprise polymer material.
  • the J central strands and K outer strands are assembled to form the multi- strand cord for example by means of a conventional twisting process, e.g. by twisting first the individual strands, the J central strands and the K outer strands, followed by twisting the strands into the cord.
  • This twisting can be done by means of a conventional tubular twisting machine or by means of a double twisting machine.
  • a multi- strand steel cord as described above for reinforcing rubber articles such as tires or conveyor belts.
  • the multi-strand steel cord according to the present invention is in particular suitable for reinforcing off-the road tires.
  • FIG. 1 shows a first embodiment of a multi-strand cord according to the present invention
  • FIG. 2 shows a second embodiment of a multi-strand cord according to the present invention
  • FIG. 3 is a schematic illustration of a method to manufacture a
  • central strand for a multi-strand cord according to the present invention.
  • Figure 1 shows the cross-section perpendicular to the axis of a multi- strand cord 100 according to the present invention.
  • the multi-strand cord 100 has a 1x(3+9) + 6x(3+9) construction, ZZSSZ, lay lengths (mm) 6.3/12.5/6.3/12.5/28.
  • the multi-strand cord 100 has thus one central strand 102 surrounded by 6 outer strands 104.
  • the filaments have for example a diameter equal to 0.245 mm.
  • the multi-strand cord 100 comprises a wrapping filament (not shown).
  • the central strand 102 has a 3+9 configuration, i.e.
  • the circumferential surface 1 12 of the core 106 of the three central metal filaments 108 of the central strand 102 is provided with polymer material 103, for example rubber.
  • the polymer material 103 is not only present on the circumferential surface 1 12 of the core 106 of the three central filaments 108 of the central strand 102 but also between the central filaments 108 of the core 106 of the central strand 102.
  • the voids created between the three central filaments 108 of the core 106 of the central strand 102 are completely filled with polymer material 103.
  • the outer strands 104 of the multi- strand cord 100 have the same configuration as the central strand 102.
  • the outer strands 104 comprise three central filaments 1 14 forming the core 1 16 of the outer strands 104 and nine outer filaments 1 18 positioned in a layer around the core 1 16 of the three central metal filaments 1 14.
  • the outer strands 104 are distinguished from the central strands 102 in that there is no polymer material on or between the filaments of the outer strands 104, i.e. not on or between the three central metal filaments 1 14 of the core and not on or between the nine outer metal filaments 1 18. Consequently, there is no polymer material on the circumferential surface 120 of the core 1 16 of the outer strands 104 and not on the circumferential surface of the outer strands 104.
  • Figure 2 shows the cross-section perpendicular to the axis of a second example of a multi-strand cord 200 according to the present invention.
  • the multi-strand cord 200 has a 1x19+6x19 construction, ZZSSZ, lay lengths (mm) 6.3/10/22.
  • the multi-strand cord 200 has thus one central strand 202 surrounded by 6 outer strands 204.
  • the filaments have a diameter of 0.20 mm.
  • the multi-strand cord 200 comprises a wrapping filament (not shown).
  • the central strand 202 has a 1 +6+12 configuration, i.e. a core 206 having one central filament 207, a first layer comprising six filaments 208 positioned around the core 206 and a second layer comprising twelve filaments 210 around the first layer.
  • the circumferential surface 212 of the core 206 comprising the central metal filament 207 of the central strand 202 is provided with polymer material 203, for example provided with rubber.
  • No polymer material is applied on the six filaments 208 of the first layer or on the twelve filaments 210 of the second layer and no polymer material is applied on the circumferential surface 213 of the central strand 202.
  • the outer strands 204 of the multi- strand cord 200 have the same configuration as the central strand 202, i.e. a 1 +6+12 configuration.
  • the outer strands 204 comprise a core 214 of one filament 215, a first layer comprising six filaments 216 positioned around the core 214 and a second layer comprising twelve filaments 218 around the first layer.
  • the outer strands 204 are distinguished from the central strands 202 in that there is no polymer material on or between the filaments of the outer strands 204, i.e. not on the central filament 216 of the core 214, not one filaments of the first layer 216 or on the filaments of the second layer 218 and not between the filaments of the outer strand.
  • Figure 3 is a schematic illustration of the equipment to manufacture a central strand for a multi-strand cord according to the present invention.
  • the strand to be manufactured has a 3+9 construction.
  • filaments 302 to be filaments of the core of the strand are fed from feed means (not shown). These filaments 302 are gathered and twisted to form the core 304 of the strand.
  • the filaments 310 to be the outer filaments of the strand are delivered and the filaments 310 are twisted around the core 306 by means of twisting machine 312 to form strand 314. Care is taken that the outer surface of the strand 314 is not contaminated with the polymer material.
  • the manufacturing of the multi-strand cord can be done in one process.

Abstract

L'invention concerne un câble d'acier à multiples torons qui comporte des J torons centraux et des K torons externes, positionnés autour des J torons centraux, J ≥ 1 et K ≥ 3. Les J torons centraux comportent un noyau de L filaments centraux et au moins une première couche de M filaments, positionnés autour dudit noyau de L filaments centraux, 1 ≤ L ≤ et 4 ≤ M ≤ 20. Les K torons externes comportent un noyau de P filaments centraux et au moins une couche de Q filaments, positionnés autour dudit noyau de P filaments centraux, 1 ≤ P ≤ 5 et 4 ≤ Q ≤ 20. La surface circonférentielle du noyau de L filaments centraux des J torons centraux est revêtue d'un matériau polymère, alors que la surface circonférentielle des J torons centraux est exempte ou sensiblement exempte de matériau polymère. En outre, les K torons externes sont exempts ou sensiblement exempts de matériau polymère. L'invention concerne en outre un procédé de fabrication d'un tel câble d'acier à multiples torons.
PCT/EP2015/060206 2014-05-14 2015-05-08 Câble d'acier à multiples torons WO2015173143A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580024668.2A CN106460320A (zh) 2014-05-14 2015-05-08 多股钢帘线

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14168225 2014-05-14
EP14168225.2 2014-05-14

Publications (1)

Publication Number Publication Date
WO2015173143A1 true WO2015173143A1 (fr) 2015-11-19

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Application Number Title Priority Date Filing Date
PCT/EP2015/060206 WO2015173143A1 (fr) 2014-05-14 2015-05-08 Câble d'acier à multiples torons

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CN (1) CN106460320A (fr)
WO (1) WO2015173143A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019082939A1 (fr) * 2017-10-25 2019-05-02 株式会社ブリヂストン Pneumatique
CN109957865A (zh) * 2017-12-25 2019-07-02 贝卡尔特公司 钢帘线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110017376A1 (en) * 2007-12-28 2011-01-27 Michelin Recherche Et Technique S.A. Layered Cable Gummed in Situ Suitable for a Tire Belt
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