EP4058629B1 - Zweischichtige metallische kabel, die eine ummantelte innere schicht und eine verbesserte leistung aufweisen - Google Patents

Zweischichtige metallische kabel, die eine ummantelte innere schicht und eine verbesserte leistung aufweisen Download PDF

Info

Publication number
EP4058629B1
EP4058629B1 EP20819811.9A EP20819811A EP4058629B1 EP 4058629 B1 EP4058629 B1 EP 4058629B1 EP 20819811 A EP20819811 A EP 20819811A EP 4058629 B1 EP4058629 B1 EP 4058629B1
Authority
EP
European Patent Office
Prior art keywords
cord
layer
cable
external
wires
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP20819811.9A
Other languages
English (en)
French (fr)
Other versions
EP4058629A1 (de
Inventor
Alexandre GIANETTI
Pierre-Marie MICHON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
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 Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Publication of EP4058629A1 publication Critical patent/EP4058629A1/de
Application granted granted Critical
Publication of EP4058629B1 publication Critical patent/EP4058629B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand 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
    • 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
    • D07B2201/2023—Strands with 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
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • 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
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • D07B2201/2031—Different twist pitch
    • D07B2201/2032—Different twist pitch compared with 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
    • D07B2201/2015—Strands
    • D07B2201/2038—Strands characterised by the number of wires or filaments
    • 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
    • D07B2201/2071—Spacers
    • D07B2201/2074—Spacers in radial direction
    • 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
    • D07B2207/00—Rope or cable making machines
    • D07B2207/40—Machine components
    • D07B2207/4072—Means for mechanically reducing serpentining or mechanically killing of rope
    • 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
    • D07B2401/2015—Killing or avoiding twist
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/12—Making ropes or cables from special materials or of particular form of low twist or low tension by processes comprising setting or straightening treatments
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
    • D07B7/145—Coating or filling-up interstices

Definitions

  • the invention relates to metal cables which can be used in particular for reinforcing tires, particularly tires intended to equip vehicles carrying heavy loads and traveling at sustained speed, such as, for example, trucks, tractors, trailers or road buses, airplanes. ...
  • a heavy-duty type tire with a radial carcass reinforcement comprises a tread, two inextensible beads, two sidewalls connecting the beads to the tread and a belt, or crown reinforcement, arranged circumferentially between the carcass reinforcement and the tread.
  • This top frame includes several frames with different functions.
  • the top frame generally comprises a working frame comprising two working layers, or crossed layers, comprising wire working metal reinforcing elements arranged one substantially parallel to the other in each working layer, but crossed from a layer to the other, that is to say inclined, symmetrically or not, with respect to the median circumferential plane, by an angle generally ranging from 15° to 40°.
  • This working frame allows, among other functions, the at least partial transmission of the transverse forces exerted by the ground on the tire during rolling of the latter in order to ensure the directionality of the tire, that is to say the capacity of the pneumatic to allow the vehicle on which it is mounted to turn.
  • the third requirement is particularly strong for tire casings for industrial vehicles such as heavy goods vehicles, designed to be able to be retreaded one or more times when the treads they contain reach a critical degree of wear after prolonged driving. .
  • layered steel cables are generally used consisting of a central core and one or more layers of concentric wires arranged around this core.
  • the most used layered cables are essentially cables of M+N or M+N+P construction, formed of a core of M wire(s) surrounded by at least one layer of N wires possibly itself surrounded by an external layer of P wires, the M, N or even P wires generally having the same diameter for reasons of simplification and cost.
  • the two-layer cables most used today in tire belts are essentially 3+N construction cables made up of a core or internal layer of 3 internal metal wires and an outer layer of N outer metal wires wound helically around the inner layer of the cable (for example, 8 or 9 outer metal wires).
  • the outer layer is relatively desaturated thanks to the high diameter of the inner layer provided by the presence of the three core wires, even more so when the diameter of the core wires is chosen greater than that of the wires of the outer layer.
  • This type of construction promotes, as we know, the external penetrability of the cable by the calendering gum of the tire or other rubber article during the cooking of the latter, and consequently makes it possible to improve the endurance of the cables in fatigue and fatigue-corrosion, particularly with regard to the cleavage problem described previously.
  • Construction cables (M>1) + N have the disadvantage that they cannot be penetrated to the core because of the presence of a channel or capillary in the center of the N core wires, which remains empty after impregnation by rubber and therefore conducive, through a sort of "wick” effect, to the propagation of corrosive environments such as water.
  • This disadvantage of M+N construction cables is well known, it has been exposed for example in patent applications WO 01/00922 , WO 01/49926 , WO 2005/071157 , WO 2006/013077 , JP2009121009 , JP2008068656 .
  • the internal layer by separating its wires, using a unitary core wire and to remove a wire from the outer layer; the cable thus obtained, of construction 1+3+(P-1), becomes penetrable from the outside to its center.
  • the core wire Relative to the wires of the internal layer, the core wire must be neither too thin, otherwise it will not produce the desired desaturation effect, nor too thick, otherwise the wire will not remain in the center of the cable.
  • the invention aims to provide a cable with improved efficiency solving the problems mentioned above.
  • any interval of values designated by the expression “between a and b” represents the range of values going from more than a to less than b (that is to say limits a and b excluded) while any interval of values designated by the expression “from a to b” means the range of values going from terminal “a” to terminal “b”, that is to say including the strict limits “a” and “b”.
  • the cable has two layers of wires, that is to say that it comprises an assembly consisting of two layers of wires, neither more nor less, that is to say that the assembly has two layers of threads, not one, not three, but only two.
  • the internal layer of the cable is surrounded by an elastomeric composition having a thickness G then it is surrounded by an external layer.
  • elastomer composition or elastomeric composition is meant that the composition comprises at least one elastomer or a rubber (the two terms being synonyms) and at least one other component.
  • Nmax E ⁇ / arctan d 3 / 2 2 / Rt 2 ⁇ d 3 / 2 2 ⁇ cos 2 ⁇ t ) 1 / 2 with, by definition, E is the integer value of the formula in parentheses, the helix radius Rt of the theoretical outer layer of the cable is the radius of the theoretical circle passing through the centers of the outer wires of the theoretical outer layer in a plane perpendicular to the axis of the cable.
  • the cable according to the invention has N> Nmax wires thus making it possible to increase the breaking strength of the cable by the addition of at least one wire additional.
  • the inventors behind the invention hypothesize that the presence of the sheath makes it possible on the one hand to create a sufficient arch around the internal layer making it possible to add an additional wire and on the other hand to relieve the contact pressures by a cushion effect between the internal layer and the external layer thereby improving the efficiency of each of the wires of the cable.
  • the pitch of a wire represents the length of this wire, measured parallel to the axis of the cable in which it is located, at the end of which the wire having this pitch makes a complete turn around said axis of the wire.
  • winding direction of a layer of wires we mean the direction formed by the wires relative to the axis of the cable.
  • the direction of winding is commonly designated by the letter either Z or S.
  • the pitches, winding direction and diameters of the wires are determined in accordance with the 2014 ASTM D2969-04 standard.
  • the cable is metallic.
  • metallic cable means a cable made up of wires consisting mainly (that is to say for more than 50% of these wires) or entirely (for 100% of the wires) of a metallic material.
  • Such a metal cable is preferably implemented with a steel cable, more preferably in pearlitic (or ferrito-pearlitic) carbon steel designated below by "carbon steel”, or even in stainless steel (by definition, steel comprising at least 11% chromium and at least 50% iron). But it is of course possible to use other steels or other alloys.
  • its carbon content (% by weight of steel) is preferably between 0.05% and 1.2%, in particular between 0.4% and 1.1%; these contents represent a good compromise between the mechanical properties required for the tire and the feasibility of the wires.
  • the metal or steel used can itself be coated with a metallic layer improving, for example, the processing properties of the metal cable and/or its constituent elements, or the usage properties of the cable and/or the tire themselves, such as adhesion properties, corrosion resistance or even resistance to aging.
  • the steel used is covered with a layer of brass (Zn-Cu alloy) or zinc.
  • the wires of the same layer all have substantially the same diameter.
  • the external wires all have substantially the same diameter.
  • substantially the same diameter we mean that the wires have the same diameter within industrial tolerances.
  • the external wires are wound helically around the internal wire at a pitch ranging from 10 to 30 mm.
  • the wires do not undergo preformation.
  • the outer layer includes a relatively high number of external wires and therefore has a relatively high breaking strength.
  • the ratio of the diameter d1 of the or of each internal metal wire to the diameter d3 of each external metal wire ranges from 0.9 to 1.2.
  • the diameter d1 of the or each internal metal wire is equal to the diameter d3 of each external metal wire.
  • the same diameter is preferably used for the internal metal wire(s) and for the external metal wires, which limits the number of different diameters to manage during the manufacture of the cable.
  • the outer layer of the cable is saturated so that the inter-wire distance of the external metal wires is strictly less than 20 ⁇ m.
  • a saturated cable layer is such that the inter-wire distance of the external metal wires is strictly less than 20 ⁇ m.
  • the inter-wire distance of the outer layer of external wires is defined, on a section of the cable perpendicular to the main axis of the cable, as the shortest distance which separates, on average, two adjacent external metal wires.
  • the inter-wire distance of the external metal wires is less than or equal to 100 ⁇ m.
  • a desaturated cable layer is such that the inter-wire distance of the external metal wires is greater than or equal to 20 ⁇ m.
  • the thickness G of the sheath of elastomeric composition is strictly greater than 10 ⁇ m, preferably greater than or equal to 12 ⁇ m and more preferably greater than or equal to 15 ⁇ m.
  • the thickness G of the sheath of elastomeric composition is less than or equal to 300 ⁇ m, preferably less than or equal to 250 ⁇ m and more preferably less than or equal to 230 ⁇ m. This thickness makes it possible to optimize the relatively high number of external metal wires and therefore to have a relatively high breaking force while limiting the external diameter of the cable.
  • the elastomeric composition comprises an elastomer chosen from the group consisting of polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers, and mixtures of these elastomers.
  • the elastomeric composition comprises an elastomer chosen from the group consisting of natural rubber, synthetic polyisoprenes, isoprene copolymers, and mixtures of these elastomers.
  • the elastomer composition also includes a vulcanization system, a filler. More preferably, the elastomer is diene.
  • the elastomeric composition comprises carbon black as a reinforcing filler.
  • the most severe transverse forces exerted in the cable when it is put under tension are the transverse forces exerted between the metal wires internal.
  • cables having an architecture in which M>1 and comprising a number of external metal wires such that the external layer of the cable is saturated so as to maximize the breaking force by adding a maximum number of external metal wires.
  • M>1 the cable according to the invention having an architecture in which M>1
  • the cable presents significantly improved breaking strength.
  • each metal wire respectively has a diameter d1, d3 ranging from 0.22 mm to 0.60 mm and preferably from 0.22 mm to 0.50 mm.
  • the transverse forces exerted between the internal metal wires are absorbed by the sheath and the cable has an improved breaking force due to the presence of an additional external metal wire while limiting its external diameter.
  • Another object of the invention is a reinforced product comprising an elastomeric matrix and at least one cable as defined above.
  • the reinforced product comprises one or more cables according to the invention embedded in the elastomeric matrix, and in the case of several cables, the cables are arranged side by side in a main direction.
  • Another object of the invention is a tire comprising at least one cable or a reinforced product as defined above.
  • the tire comprises a carcass reinforcement anchored in two beads and surmounted radially by a crown reinforcement itself surmounted by a tread, the crown reinforcement being joined to said beads by two sidewalls and comprising at least one cable as defined above.
  • the top frame comprises a protective frame and a working frame, the working frame comprising at least one cable as defined above, the protective frame being radially interposed between the tread and working frame.
  • the cable is particularly intended for industrial vehicles chosen from heavy vehicles such as "heavy goods vehicles” - i.e., metro, bus, road transport vehicles (trucks, tractors, trailers), off-road vehicles -, agricultural machinery or civil engineering, other transport or handling vehicles.
  • heavy vehicles such as "heavy goods vehicles” - i.e., metro, bus, road transport vehicles (trucks, tractors, trailers), off-road vehicles -, agricultural machinery or civil engineering, other transport or handling vehicles.
  • the tire is for heavy goods vehicles.
  • the “median circumferential plane” M of the tire is the plane which is normal to the axis of rotation of the tire and which is located equidistant from the annular reinforcing structures of each bead.
  • Tire 10 is for heavy-duty vehicles. Thus, the tire 10 has a dimension of type 315/80 R 22.5.
  • This tire 10 comprises a crown 2 reinforced by a crown reinforcement or belt 6, two sidewalls 3 and two beads 4, each of these beads 4 being reinforced with a rod 5.
  • the crown 2 is surmounted by a tread not shown in this schematic figure.
  • a carcass reinforcement 7 is wound around the two rods 5 in each bead 4, the turning 8 of this reinforcement 7 being for example arranged towards the outside of the tire 10 which is here shown mounted on its rim 9.
  • the carcass reinforcement 7 is in a manner known in itself constituted by at least one layer reinforced by so-called "radial” cables, that is to say that these cables are arranged practically parallel to each other and extend from a bead to the other so as to form an angle between 80° and 90° with the median circumferential plane (plane perpendicular to the axis of rotation of the tire which is located halfway between the two beads 4 and passes through the middle of the vertex reinforcement 6).
  • the tire according to the invention is characterized in that its belt 6 comprises at least, by way of reinforcement of at least one of the belt plies, a two-layer metal cable according to the invention.
  • this belt 6 it will be understood that the cables of the invention can for example reinforce all or part of the so-called working belt layers.
  • this tire 10 further comprises in a known manner a layer of internal rubber or elastomer (commonly called "inner rubber") which defines the radially internal face of the tire and which is intended to protect the carcass ply from the diffusion of air coming from the space inside the tire.
  • the reinforced product 100 comprises at least one cable 50, in this case several cables 50, embedded in the elastomeric matrix 102.
  • the reinforced product 100 comprises several cables 50 arranged side by side in the main direction X and extending parallel to each other within the reinforced product 100 and collectively embedded in the elastomeric matrix 102.
  • Cable 50 is metallic and has two layers. Thus, we understand that the layers of metal wires constituting the cable 50 are two in number, no more, no less.
  • the cable 50 comprises an internal layer C1 of the cable made up of M>1 internal metal wires F1.
  • the internal layer C1 is surrounded by an elastomeric composition having a thickness G then forming the sheathed internal layer CIG.
  • the outer layer C3 is made up of N>Nmax outer metal wires F3 wound around the inner CIG sheathed layer of the cable.
  • Each internal metal wire F1 and each external metal wire F3 has a diameter d1 and d3 respectively.
  • the outer layer C3 of the cable is saturated.
  • the inter-wire distance of the external wires is strictly less than 20 ⁇ m and here is equal to 0 ⁇ m.
  • Each wire has a breaking strength, noted Rm, such that 2500 ⁇ Rm ⁇ 3100 MPa.
  • the steel of these wires is said to be SHT (“Super High Tensile”) grade.
  • Other yarns can be used, for example yarns of a lower grade, for example of grade NT (“Normal Tensile”) or HT (“High Tensile”), as well as yarns of a higher grade, for example of grade UT (“ Ultra Tensile”) or MT (“Mega Tensile”).
  • the cable according to the invention is manufactured using a process comprising well-defined steps. known to those skilled in the art.
  • torque balancing we mean here in a manner well known to those skilled in the art the cancellation of the residual torques (or the elastic return of torsion) exerted on each wire, in the intermediate layer as in the outer layer.
  • the thickness G of the sheath of elastomeric composition is strictly greater than 10 ⁇ m, preferably greater than or equal to 12 ⁇ m and more preferably greater than or equal to 15 ⁇ m and the thickness G is less than or equal to 300 ⁇ m, preferably less or equal to 250 ⁇ m and more preferably less than or equal to 230 ⁇ m.
  • G 71 ⁇ m.
  • the elastomeric composition includes a vulcanization system, a filler and a diene elastomer.
  • elastomeric composition a composition of conventional diene elastomer(s) for tires is used, based on natural rubber (peptized) and carbon black N330 (65 phr), further comprising the following usual additives: sulfur (7 pce), sulfenamide accelerator (1 pce), ZnO (8 pce), stearic acid (0.7 pce), antioxidant (1.5 pce), cobalt naphthenate (1.5 pce) (pce meaning parts by weight per hundred parts of elastomer); the modulus E10 of the elastomeric coating composition is approximately 10 MPa.
  • the hoop F is wound at pitch pf in the Z direction around the assembly previously obtained.
  • the cable is then incorporated by calendering into composite fabrics formed from a known composition based on natural rubber and carbon black as a reinforcing filler, conventionally used for the manufacture of crown reinforcements of radial tires.
  • This composition essentially comprises, in addition to the elastomer and the reinforcing filler (carbon black), an antioxidant, stearic acid, an extension oil, cobalt naphthenate as an adhesion promoter, finally a vulcanization system (sulfur, accelerator, ZnO).
  • the composite fabrics reinforced by these cables comprise a matrix of elastomeric composition formed of two thin layers of elastomeric composition which are superimposed on either side of the cables and which respectively have a thickness ranging from 0.6 and 1.5 mm.
  • the calendering pitch (no laying of the cables in the elastomeric composition fabric) ranges from 1 mm to 4 mm.
  • Table 5 summarizes the characteristics of control cable T1, comparative cables C1 and C2 not in accordance with the invention.
  • the 50' cable according to the invention has a breaking force of the same order as that of the comparative cable C2 and better compared to the control cable T1 and the cable comparison C1.
  • the breaking force reduced to the diameter of the cable is significantly greater than that of the control cable T1 and those of the comparative cables C1 and C2 with improved penetrability.
  • the cable according to the invention has a better arrangement of the wires in the same footprint. This test clearly demonstrates that the presence here of the sheath of elastomeric composition allowing two additional wires to be placed on the external layer in accordance with the invention makes it possible to obtain an arch effect and thus a more effective participation of each wire in the breaking force. of the cable compared to the T1 cable and thus resolve the problems mentioned in the preamble.

Landscapes

  • Ropes Or Cables (AREA)

Claims (14)

  1. Zweilagiges Metallseil (50), umfassend:
    - eine innere Lage (C1), die aus M>1 inneren Metalldrähten (F1) besteht,
    - eine äußere Lage (C3) des Seils, die aus N äußeren Metalldrähten (F3) besteht, die um die innere Lage (C1) des Seils gewunden sind, dadurch gekennzeichnet, dass:
    das Seil (50) mit einem Verfahren erhalten wird, das einen Schritt der Fertigung der ummantelten inneren Lage (CIG) umfasst, bei dem die innere Lage (Cl) mit einer Elastomerzusammensetzung umgeben wird, die eine Dicke G aufweist, dann mit den N äußeren Metalldrähten, um die äußere Lage (C3) zu bilden, wobei N strikt größer als Nmax ist, das die maximale Anzahl von äußeren Metalldrähten (F3) ist, die auf der theoretischen äußeren Lage (C3T) angeordnet werden können, die erhalten wird, wenn die innere Lage (C1) direkt in Kontakt mit der theoretischen äußeren Lage (C3T) ist.
  2. Seil (50) nach dem vorhergehenden Anspruch, bei dem N= Nmax+1 oder Nmax+2 und bevorzugt N=Nmax+1.
  3. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem der Durchmesser d1 jedes inneren Metalldrahts (F1) gleich dem Durchmesser d3 jedes äußeren Metalldrahts (F3) ist.
  4. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem die äußere Lage (C3) des Seils gesättigt ist, so dass der Zwischendrahtabstand der äußeren Metalldrähte (F3) strikt kleiner als 20 pm ist.
  5. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem die Dicke G des Mantels aus Elastomerzusammensetzung strikt größer als 10 µm, bevorzugt größer als oder gleich 12 µm und noch bevorzugter größer als oder gleich 15 µm ist.
  6. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem die Dicke G des Mantels aus Elastomerzusammensetzung kleiner als oder gleich 300 µm, bevorzugt kleiner als oder gleich 250 µm und noch bevorzugter kleiner als oder gleich 230 µm ist.
  7. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem der Mantel aus Elastomerzusammensetzung ein Elastomer umfasst, das aus der Gruppe gewählt ist, die aus den Polybutadienen, dem Naturkautschuk, den synthetischen Polyisoprenen, den Butadien-Copolymeren, den Isopren-Copolymeren und den Mischungen dieser Elastomere besteht.
  8. Seil (50) nach dem vorhergehenden Anspruch, bei dem der Mantel aus Elastomerzusammensetzung ein Elastomer umfasst, das aus der Gruppe gewählt ist, die aus dem Naturkautschuk, den synthetischen Polyisoprenen, den Isopren-Copolymeren und den Mischungen dieser Elastomere besteht.
  9. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem der Mantel aus Elastomerzusammensetzung Ruß als verstärkenden Füllstoff umfasst.
  10. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem M = 2, 3 oder 4 und bevorzugt M = 3 oder 4.
  11. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem N = 9, 10, 11 oder 12, bevorzugt N = 10 oder 11.
  12. Seil (50) nach einem der vorhergehenden Ansprüche, bei dem jeder Metalldraht (F1, F3) einen jeweiligen Durchmesser d1, d3 von 0,22 mm bis 0,60 mm und bevorzugt von 0,22 mm bis 0,50 mm aufweist.
  13. Verstärktes Produkt (100), dadurch gekennzeichnet, dass es eine Elastomermatrix (102) und mindestens ein Seil (50) nach einem der Ansprüche 1 bis 12 umfasst.
  14. Reifen (10), dadurch gekennzeichnet, dass er mindestens ein Seil (50) nach einem der Ansprüche 1 bis 12 oder ein verstärktes Produkt nach Anspruch 13 umfasst.
EP20819811.9A 2019-11-15 2020-11-05 Zweischichtige metallische kabel, die eine ummantelte innere schicht und eine verbesserte leistung aufweisen Active EP4058629B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1912766A FR3103200A1 (fr) 2019-11-15 2019-11-15 Câble métalliques à deux couches avec couche interne gainée à rendement amélioré
PCT/FR2020/051995 WO2021094674A1 (fr) 2019-11-15 2020-11-05 Câbles métalliques à deux couches avec couche interne gainée à rendement amélioré

Publications (2)

Publication Number Publication Date
EP4058629A1 EP4058629A1 (de) 2022-09-21
EP4058629B1 true EP4058629B1 (de) 2024-04-03

Family

ID=70295197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20819811.9A Active EP4058629B1 (de) 2019-11-15 2020-11-05 Zweischichtige metallische kabel, die eine ummantelte innere schicht und eine verbesserte leistung aufweisen

Country Status (4)

Country Link
EP (1) EP4058629B1 (de)
AU (1) AU2020382109A1 (de)
FR (1) FR3103200A1 (de)
WO (1) WO2021094674A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795751A1 (fr) 1999-06-29 2001-01-05 Michelin Soc Tech Cable d'acier multicouches pour carcasse de pneumatique
ATE267908T1 (de) 1999-12-30 2004-06-15 Michelin Soc Tech Mehrlagiges stahlseil für die karkasse eines luftreifens
FR2864556B1 (fr) 2003-12-24 2006-02-24 Michelin Soc Tech Cable a couches pour armature de carcasse de pneumatique
FR2873721A1 (fr) 2004-08-02 2006-02-03 Michelin Soc Tech Cable a couches pour armature de sommet de pneumatique
JP2008068656A (ja) * 2006-09-12 2008-03-27 Bridgestone Corp 空気入りラジアルタイヤ
JP2009121009A (ja) * 2007-05-17 2009-06-04 Bridgestone Corp コードおよびその製造方法並びに、コード製造設備

Also Published As

Publication number Publication date
WO2021094674A1 (fr) 2021-05-20
EP4058629A1 (de) 2022-09-21
AU2020382109A1 (en) 2022-05-19
FR3103200A1 (fr) 2021-05-21

Similar Documents

Publication Publication Date Title
EP3728728A1 (de) Zweilagige mehrsträngige korde mit sehr niedrigen, niedrigen und mittleren moduli
EP3728731B1 (de) Zweilagige mehrsträngige korde mit sehr niedrigen, niedrigen und mittleren moduli
EP3728730B1 (de) Zweilagige mehrsträngige korde mit sehr niedrigen, niedrigen und mittleren moduli
EP3728729B1 (de) Zweilagige mehrsträngige korde mit sehr niedrigen, niedrigen und mittleren moduli
EP4061996B1 (de) Zweischichtiges mehradriges kabel mit einer verbesserten oberflächenenergie bis zum bruch
WO2021260302A1 (fr) Câble multi-torons à deux couches à endurance sous flexion améliorée
EP4058629B1 (de) Zweischichtige metallische kabel, die eine ummantelte innere schicht und eine verbesserte leistung aufweisen
EP4172408A1 (de) Zweischichtiges mehradriges kabel mit verbesserter biegefestigkeit
WO2021260303A1 (fr) Câble multi-torons à deux couches à endurance sous flexion améliorée
EP4172405A1 (de) Zweischichtiges mehradriges kabel mit verbesserter biegefestigkeit
EP4058628B1 (de) Zweischichtiges mehradriges kabel, das eine ummantelte innenschicht und verbesserte leistung aufweist
FR3130858A1 (fr) Câble multi-torons à deux couches à endurance sous flexion améliorée
EP4240897A1 (de) Zweilagiges mehrsträngiges kabel mit umhüllter innenschicht mit verbesserter durchlässigkeit
FR3136788A1 (fr) Câble multi-torons à deux couches de multi-torons
WO2023247232A1 (fr) Câble multi-torons à deux couches de multi-torons
FR3122678A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée
FR3122676A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée
WO2021094675A1 (fr) Câble multi-torons à deux couches avec couche interne gainée à pénétrabilité améliorée
EP4334141A1 (de) Zweischichtiges mehradriges kabel mit verbesserter oberflächenbruchenergie
FR3122672A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée
FR3122674A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée
FR3122673A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée
FR3122675A1 (fr) Câble multi-torons à deux couches à énergie de rupture surfacique améliorée

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220615

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20231218

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602020028488

Country of ref document: DE