Patent ID: 9010079
Filing Date: 2015-04-21
Classification: D02G,D07B

Abstract:
1. A method for manufacturing a metal cord with three concentric layers, of M+N+P construction, rubberized in situ with rubber or a rubber composition, the cord comprising a first layer or core of diameter dc made up of M wire(s) of diameter d 1 , around which core are wound together as a helix at a pitch p 2 , as a second layer, N wires of diameter d 2 , around which second layer are wound together as a helix at a pitch p 3 , as a third layer, P wires of diameter d 3 , the method comprising the following steps: an assembling step of assembling the N wires of the second layer around the core in order to form, at a point called “assembling point”, an intermediate cord called “core strand” of M+N construction; respectively upstream and/or downstream of the assembling point, a sheathing step in which the core and/or the core strand is sheathed with the rubber or the rubber composition by passing through at least one extrusion head; then an assembling step in which the P wires of the third layer are assembled around the core strand to form a cord of M+N+P construction thus rubberized from the inside, wherein said rubber is an unsaturated thermoplastic elastomer extruded in the molten state.