Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Techniques S.a.

Compagnie Generale Des Establissements Michelin

Compagnie Generale Des Etablissments Michelin

Societe Detechnologie Michelin

Henri Barguet

Thibaud Pottier

Alain Domingo

Olivier Reix

Francis Aubarede

Gael Pataut

Brigitte Marie Chauvin

Le Tu Anh Vo

Marc Calvet

Arnaud Letocart

Arthur Topin

Francois-Jacques Cordonnier

Sandra Boisseau

Michel Ahouanto

Emmanuel Clement

Gael Roty

Richard Cornille

Christian Signoret

Gilles Sallaz

Jacques Gauthier

Denis Alvarez

Thibault Rapenne

Laurence Ducourant

Le Tu Ahn Vo

Lucas Lauby

The method makes it possible to manufacture an assembly (A) comprising a layer (C) of metal filamentary elements () wound in a helix. The method comprises a step () of supplying a temporary assembly () comprising a layer () of M'>1 metal filamentary elements () and a temporary centre (), and a step () of separating the temporary assembly () between a first split assembly (), a second split assembly () and the temporary centre (). The method comprises a step () of reassembling the first split assembly () with the second split assembly () so as to form the layer (C) of the assembly (A).

Method for separation and reassembly

A multi-strand cord () having a 1×N structure comprises a single layer () of N strands () wound in a helix about a main axis (A), each strand () having one layer () of metal filaments (F) and comprising M>1 metal filaments wound in a helix about an axis (B). The cord () has a total elongation At>8.10% and the energy-at-break indicator Er of the cord (), defined by Er=∫σ(Ai)×dAi where σ(Ai) is the tensile stress in MPa measured at the elongation Ai and dAi is the elongation such that Er is strictly greater than 52 MJ/m.

Single-layer multi-strand cable having improved energy at break and an improved total elongation

A cord () comprises a single layer () made up of N helically wound metal filamentary elements () having an outer diameter D, the metal filamentary elements () defining an internal enclosure () of the cord of diameter Dv. Each metal filamentary element () has a diameter Df and a helix radius of curvature Rf. With this cord (), D, Dv, Df and Rf being expressed in millimeters: 0.10≤Jr≤0.25, 9≤Rf/Df≤30, and 1.60≤Dv/Df≤3.20, where Jr=N/(π*(D−Df))×(Dh×Sin(π/N)−(Df/Cos(α×π/180))) and α is the helix angle, expressed in degrees, of each metal filamentary element ().

Highly compressible open reinforcing cord

A cord () comprises a single layer () of helically wound metal filamentary elements (). The metal filamentary elements define an internal enclosure () of the cord of diameter Dv. Each metal filamentary element () has a diameter Df and a helix radius of curvature Rf. With Dv, Df and Rf being expressed in millimetres, the cord satisfies the following relationships: 9&#x2264;Rf/Df&#x2264;30 and 1.30&#x2264;Dv/Df&#x2264;2.10.

Highly compressible open cord

An adapter for a rolling assembly having an axis of rotation (YY'), the rolling assembly comprising a tyre having two beads, and a rim having two rim bead seats, for each bead, provides the connection between the bead and the rim, the said adapter comprising an axially inner end connected to the rim, an axially outer end comprising an outer reinforcing element and intended to come into contact, via a substantially radial axially inner face, or bearing face, with a bead, a body connecting the axially outer end to the axially inner end so as to form a single piece, comprising at least one main reinforcement providing the connection between the outer reinforcing element and the inner reinforcing element, and comprising a substantially axial adapter seat intended to come into contact with a bead. The outer reinforcing element is completely axially on the outside of the bearing face, and the outer reinforcing element is a substantially annular structure, referred to as a bead wire, of polygonal section, comprising an individual metal wire of diameter D, the said wire being coated in an elastomer composition and wound contiguously around a support at least three times in an axial direction and at least twice in a radial direction.

Adapter for a wheeled assembly and a wheeled assembly comprising same

Adapter for rolling assembly comprising tire and rim to provide the connection therebetween. The adapter has axially inner end with inner reinforcing element, axially outer end with outer reinforcing element, and a body. The outer reinforcing element, axially outside of bearing face (), is a bead wire made of three layers () of metal threads and concentric. First layer () includes metal thread of diameter D, 0.8&#x2264;D&#x2264;5 mm, second layer () has metal thread of diameter D, D&#x2264;1.4&#xd7;D, and wound in a helix at angle A, 2&#xb0;&#x2264;A&#x2264;10&#xb0;, and third layer () has metal thread of diameter Dand wound in a helix around second layer () at angle A, 2&#xb0;&#x2264;A&#x2264;10&#xb0;, and of opposite sign to A

Adapter for a rolling assembly and rolling assembly comprising same

An apparatus for producing an assembly of filamentary elements that are wound together in a helix includes a twisting device, a preforming device, and an assembling device. The twisting device is structured to twist at least first and second filamentary elements individually, such that each filamentary element is twisted separately from another filamentary element, to produce at least first and second twisted filamentary elements. The preforming device, which is arranged downstream of the twisting device, is structured to preform each of the twisted filamentary elements individually into separate preformed helixes, to produce at least first and second preformed helixes. The assembling device, which is arranged downstream of the preforming device, is structured to assemble the preformed helixes into an assembly.

Unit for producing an assembly

A facility for manufacturing at least first and second assemblies of M1 filamentary elements and M2 filamentary elements, in which each of the first and second assemblies includes a plurality of filamentary elements wound together in a helix, includes an assembling apparatus and a splitting apparatus. The assembling apparatus of the facility assembles M filamentary elements together into a layer of M filamentary elements around a temporary core, to form a temporary assembly. The splitting apparatus of the facility splits the temporary assembly into at least the first and second assemblies of M1 filamentary elements and M2 filamentary elements.

Splitting facility

A method is provided for manufacturing at least first and second assemblies of M1 filamentary elements and M2 filamentary elements. At least one of the first and second assemblies includes a plurality of filamentary elements wound together in a helix. The method includes a step of assembling M filamentary elements together into a layer of the M filamentary elements around a temporary core, to form a temporary assembly. The method also includes a step of splitting the temporary assembly into at least the first and second assemblies of M1 filamentary elements and M2 filamentary elements.

Splitting method

Multistrand metal cable of 4&#xd7;(4+M) construction, which can especially be used for reinforcing tire belts for industrial vehicles, formed from four elementary strands assembled in a helix with a helix pitch P, each elementary strand consisting of a two-layer cable of 4+M construction comprising an inner layer Cformed from four wires of diameter D, assembled in a helix with a pitch P, and an unsaturated outer layer Cof M wires, M being greater than or equal to 8 and smaller than or equal to 11, of diameter D, these being assembled in a helix with a pitch Paround the inner layer C, Pbeing smaller than P, the four wires of the inner layer Cbeing wound in a helix in the same twist direction as the M wires of the outer layer C, and wherein each of the diameters Dand Dis greater than or equal to 0.10 mm but less than or equal to 0.50 mm.

High-permeability elastic multistrand metal cable

Metal cord (C-) having two layers (Ci, Ce) of 3+N construction, rubberized in situ, comprising an inner layer (Ci) formed from three core wires () of diameter dwound together in a helix with a pitch pand an outer layer (Ce) of N wires () N varying from 6 to 12, of diameter d, which are wound together in a helix with a pitch paround the inner layer (Ci), wherein said cord has the following characteristics (d, d, pand pare expressed in mm): 0.20&#x3c;d&#x3c;0.50; 0.20&#x3c;d&#x3c;0.50; p/p&#x2266;1; 5&#x3c;p&#x3c;30; 10&#x3c;p&#x3c;30; the inner layer is sheathed with a diene rubber composition called a 'filling rubber' () which, for any length of cord of at least 2 cm, is present in the central channel () formed by the three core wires and in each of the gaps lying between the three core wires () and the N wires () of the outer layer (Ce); and the content of filling rubber in the cord is between 5 and 30 mg per g of cord.

In-situ-rubberized layered cord that can be used in a tire belt

A metal cord (C-1) having two layers (Ci, Ce) of 3+N construction, rubberized in situ, comprising an inner layer (Ci) formed from three core wires () of diameter dwound together in a helix with a pitch pand an outer layer (Ce) of N wires () N varying from 6 to 12, of diameter d, which are wound together in a helix with a pitch paround the inner layer (Ci), said cord being characterized in that it has the following characteristics (d, d, pand pbeing in mm): 0.08&#x3c;d&#x3c;0.30; 0.08&#x3c;d&#x2266;0.20; p/p&#x2266;1; 3&#x3c;p&#x3c;30; 6&#x3c;p&#x3c;30; the inner layer is sheathed with a diene rubber composition called a 'filling rubber' () which, for any length of cord of 2 cm or more, is present in the central channel () formed by the three core wires and in each of the gaps lying between the three core wires () and the N wires () of the outer layer (Ce); the content of filling rubber in the cord is between 5 and 35 mg per g of cord. Also disclosed is a multistrand rope comprising at least one two-layer cord, intended in particular for tires of industrial vehicles of the civil engineering type.

In-situ rubberized layered cable for carcass reinforcement for tire

J strands form a core. K outer strands are wound around it in a helix with pitch P, each having a cord with an L wire inner layer of diameter d, and an M wire outer layer of diameter d, wound around the inner layer in a helix with pitch p; with (in mm): 0.10&#x3c;d&#x3c;0.50; 0.10&#x3c;d&#x3c;0.50; 6&#x3c;p&#x3c;30; its inner layer is sheathed with filling rubber; over any length Pof the outer strand, filling rubber is in each of the capillaries delimited by L wires of the inner layer and M wires of the outer layer, and also, when L is equal to 3 or 4, in the central channel delimited by L wires of the inner layer. Filling rubber in said outer strand is 5 to 40 mg per g of strand.

Multi-strand cord in which the basic strands are dual layer cords, rubberized in situ

Metal cord of K&#xd7;(L+M) construction. K elementary strands assembled in a helix, with pitch P, each having a cord with L wire inner layer of diameter d, and M wire outer layer of diameter d, in a helix with pitch paround the inner layer; with (in mm): 0.10&#x3c;d&#x3c;0.50; 0.10&#x3c;d&#x3c;0.50; 3&#x3c;p&#x3c;10; inner layer is sheathed with filling rubber; over a K times Plength of the elementary strand, filling rubber is in each of the capillaries delimited by the L wires of the inner layer and the M wires of the outer layer, and also, when L is equal to 3 or 4, in the central channel delimited by the L wires of the inner layer. The amount of filling rubber in said elementary strand is 5 to 40 mg per g of elementary strand.

A compact metal cable having two layers (C, C) of construction 1+N, rubberized in situ, usable in particular as a reinforcing element for a tire belt for a heavy industrial vehicle, comprising a core or inner layer (C) comprising a single core wire of diameter d, and a saturated outer layer (C) of N wires of diameter dwound together in a helix at a pitch paround the layer C. The layered cable has the following characteristics (d, d, pin mm): 0.15&#x3c;d&#x3c;0.50; 0.15&#x3c;d&#x3c;0.50; 8&#x3c;p&#x3c;25. The core wire is surrounded by a sheath of diene rubber which fills, at least in part, the gaps between the core wire and the cords of the layer C

Growing community of inventors

Les Martres-d'Artiere, France

Henri Barguet