WO2014167005A1 - Reinforced rubber product comprising a sheathed reinforcing element - Google Patents

Abstract

A reinforced rubber product for a tyre comprises a reinforcing element (12) extending in a main direction (A, X) and embedded in a mass of coating rubber. The reinforcing element (12) comprises: • - at least one wire element (16) coated with a polymer sheath (18), and • - at least one circumferential and/or axial mechanical anchoring element (22) of the mass of coating rubber, the circumferential and/or axial mechanical anchoring element (22) being formed in or on the polymer sheath (18).

Description

 Reinforced rubber product comprising a sheathed reinforcing element

[001] The invention relates to a rubber reinforced product for a tire, a tire, a method of manufacturing the rubber-reinforced product and a manufacturing facility for this rubber-reinforced product. The invention applies to any type of tire.

[002] The state of the art is known of a tire, for example a radial carcass reinforcement for a heavy vehicle type vehicle. The tire comprises a tread, two inextensible beads, two flanks connecting the beads to the tread and a crown reinforcement disposed circumferentially between the carcass reinforcement and the tread.

[003] The carcass and crown reinforcements comprise one or more reinforcing plies comprising reinforcement elements embedded in a coating rubber mass. Each reinforcing element has a generally elongate shape and extends in a main direction substantially parallel to its length.

[004] In the state of the art, each reinforcing element comprises a wire element forming a cable comprising a plurality of metal monofilaments, for example a layered cable. In some cases, the reinforcing element also comprises a sheath of polymer coating the wire element, for example a sheath of thermoplastic material, for example nylon. The polymer sheath has a substantially circular section.

 Within the reinforcing ply, the reinforcing element and the coating rubber mass are secured to one another by means of an adhesive-type bond between an outer surface of the polymer sheath and an inner surface of the coating rubber mass.

[006] However, under the effect of certain repeated mechanical stresses exerted during the rolling of the tire, this adhesive bond can lose in effectiveness, in particular under the effect of twists inducing circumferential and / or axial movements between the polymer sheath and the coating rubber mass.

 [007] The reinforcing element can then no longer perform its reinforcing ply reinforcement function while the wire element still has mechanical properties and endurance that would allow the reinforcing element to properly ensure its function if the adhesive bond had not broken. The tire must then be changed.

[008] The purpose of the invention is to extend the duration of use of the tire. For this purpose, the subject of the invention is a reinforced tire rubber product comprising a reinforcement element extending in a main direction and embedded in a coating rubber mass, the reinforcing element comprising:

 at least one wire element coated with a polymer sheath, and

 at least one circumferential and / or axial mechanical anchoring element of the coating rubber mass, the circumferential and / or axial mechanical anchoring element being formed in or on the polymer sheath.

 [010] The reinforced rubber product according to the invention allows to extend the duration of use of the tire.

 [011] Indeed, on the one hand, the sheath limits or even prevents the penetration of external agents, including potentially corrosive agents, in contact with the wire element or elements which limits the decay of the reinforcing element.

[012] On the other hand, thanks to the circumferential and / or axial mechanical anchoring element, the risk of rupture of the adhesive bond between the sheath and the coating rubber mass is reduced. The circumferential and / or axial mechanical anchoring element makes it possible to ensure a mechanical connection by mechanical anchoring of the coating rubber mass in or on the sheath. This mechanical connection is added to the adhesive bond which then undergoes less mechanical stresses.

[013] By adhesive bond means a bond whose strength is essentially due to chemical and / or electrostatic interactions between the sheath and the coating rubber mass.

 By mechanical bond means a bond whose strength is essentially due to the geometric arrangement between the sheath and the coating rubber mass.

 [015] The mechanical anchoring element can ensure a mechanical anchorage only circumferential, only axial or both circumferential and axial.

By circumferential mechanical anchoring is meant that the anchoring element prevents any movement in the circumferential direction of the sheath relative to the coating rubber mass. Axial mechanical anchoring means that the anchoring element prevents any movement in the axial direction, that is to say the direction parallel to the main direction, of the sheath with respect to the coating rubber mass. .

[017] Wire element means any elongate element of great length relative to its cross section, whatever the shape of the latter, for example circular, oblong, rectangular or square, or even flat, this element wired which can be rectilinear as non-rectilinear, for example twisted or corrugated. When it is circular in shape, its diameter is preferably less than 5 mm, more preferably in a range of 0.1 to 2 mm.

 [018] In one embodiment, the wire element or elements are textile. By textile, it is understood that the wire element or elements are made of a material chosen from a polyester, such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polybutylene naphthalate (PBN) polypropylene terephthalate (PPT) or polypropylene naphthalate (PPN), a polyamide, for example an aliphatic polyamide such as nylon or an aromatic polyamide such as aramid, a polyketone, a cellulose such as rayon or a mixture of these materials.

 [019] In another embodiment, the wire element or elements are metallic. Metallic means by definition one or more wire elements constituted predominantly (that is to say, for more than 50% of its mass) or integrally (for 100% of its mass) of a metallic material. Preferably, the metallic material is steel, more preferably carbonaceous perlitic (or ferrito-pearlitic) steel advantageously comprising between 0.4% and 1.2% by weight of carbon.

[020] In the rubber-reinforced product, the coating rubber mass is preferably raw.

[021] Advantageously, the circumferential and / or axial mechanical anchoring element is integral with the polymer sheath.

 [022] By material come is meant that the circumferential and / or axial mechanical anchoring element is in the same material as the sheath and in one piece with the sheath.

[023] Preferably, the reinforcing element comprises a plurality of circumferential and / or axial mechanical anchoring elements respectively distributed circumferentially and / or axially in or on the polymer sheath.

 [024] In one embodiment, the circumferential and / or axial mechanical anchoring element comprises a circumferential and / or axial mechanical anchoring cavity formed in the polymer sheath.

 [025] The cavity extends radially inwardly of the sheath. The cavity forms a female part adapted to receive a male part of the coating rubber mass.

[026] In a variant of this embodiment, the circumferential and / or axial mechanical anchoring cavity forms a groove extending substantially parallel to the respectively principal and / or circumferential direction. [027] In another variant of this embodiment, each cavity is punctual.

 [028] In another embodiment, the circumferential and / or axial mechanical anchoring element comprises a circumferential and / or axial mechanical anchoring protrusion formed on the polymer sheath.

 [029] The projection extends radially outwardly of the sheath. The mechanical anchoring projection forms a male portion adapted to be received in a female portion of the coating rubber mass.

 [030] In a variant of this embodiment, the circumferential and / or axial mechanical anchoring projection forms a rail extending substantially parallel to the respectively principal and / or circumferential direction.

 [031] In another variant of this embodiment, each projection is punctual.

 [032] By cavity or point projection, it is meant that the cavity or projection extends over a finite distance in the main direction and the circumferential direction.

 [033] Advantageously, the circumferential and / or axial mechanical anchoring element is arranged so as to radially anchor the polymer sheath and the coating rubber mass with respect to one another.

 [034] In addition to the circumferential and / or axial mechanical anchoring, the element can also prevent any radial movement of the polymer sheath relative to the coating rubber mass, that is to say any movement perpendicular to the main direction.

 [035] Preferably, in a plane perpendicular to the main direction, the polymer sheath is delimited by a concave contour, that is to say non-convex. By concave is meant that in a plane perpendicular to the main direction, there are at least two points of the contour of the sheath can be joined by a straight line without passing exclusively by the sheath.

 [036] Optionally, each anchoring element has a characteristic dimension greater than or equal to 0.01 mm, preferably 0.02 mm and more preferably 0.05 mm. By characteristic dimension is meant the smallest circle diameter in which, in a plane perpendicular to the main direction, the contour delimiting each anchoring element may be inscribed.

[037] Optionally, the polymer sheath is made of a composition comprising at least one of the compounds chosen from an elastomer, a thermoplastic polymer and a mixture of these compounds. Advantageously, the polymer sheath is made in a composition having a melting temperature greater than or equal to 120 ° C, preferably 140 ° C and more preferably 160 ° C. Thus, the sheath has a high resistance to heating which reduces the degradation of mechanical anchoring at high temperatures.

[038] Optionally, the polymer sheath is coated with an adhesive layer, for example a layer of glue type RFL (Resorcinol-Formaldehyde-Latex) or equivalent.

 [039] In one embodiment, the polymer is an elastomer. Preferably, the elastomer is diene and more preferably chosen from the group consisting of polybutadienes (BR), synthetic polyisoprenes (IR), natural rubber (NR), butadiene copolymers, isoprene copolymers and mixtures of these elastomers. Such copolymers are more preferably selected from the group consisting of styrene-butadiene copolymers (SBR), isoprene-butadiene copolymers (BIR), isoprene-styrene copolymers (SIR), isoprene-copolymers butadiene-styrene (SBIR) and mixtures of such copolymers.

 [040] In one embodiment, the polymer is thermoplastic. Preferably, the thermoplastic polymer is chosen from a polyester, a polyamide, a polyketone, a cellulose, a polyphenylene ether, a thermoplastic elastomer (TPE) or a mixture of these materials, and more preferably from a polyester and a polyamide.

 [041] Preferably, the polyester is chosen from a polyethylene terephthalate (PET), a polyethylene naphthalate (PEN), a polybutylene terephthalate (PBT), a polybutylene naphthalate (PBN), a polypropylene terephthalate (PPT) and a polypropylene naphthalate (PPN) and more preferably is polyethylene terephthalate (PET).

 [042] Preferably, the polyamide is an aliphatic polyamide, for example nylon.

 [043] Preferably, the thermoplastic elastomer (TPE) is a styrenic elastomer (TPS). Thermoplastic elastomer (TPE) can be functionalized. Thermoplastic elastomer (TPE) can be unsaturated.

 [044] In one embodiment, the reinforcing element comprises a single wire element.

 [045] In another embodiment, the reinforcing element comprises a row of several wire elements.

[046] For example, the wire element is a textile elementary monofilament, a textile or metal elementary ribbon, a textile or metal film, a fiber textile multifilament yarn comprising a plurality of elementary textile monofilaments, a textile twister comprising a plurality of textile multifilament fibers twisted together, a textile cord comprising a plurality of multifilament textile fibers, a metal cable comprising a plurality of metal monofilaments or an assembly comprising a plurality of textile or metal cables then called strands.

 [047] In the preferred case where the reinforcing element comprises a wire element comprising several metal monofilaments or textile fibers or several strands, the metal monofilaments, the textile fibers or the strands are assembled by twisting or wiring. It is recalled that there are two possible techniques of assembly:

 either by twisting: the metal monofilaments, the textile fibers or the strands undergo both a collective twist and an individual twist around their own axis, which generates a torque of untwisting each of the monofilaments or strands;

 either by cabling: the metal monofilaments, the textile fibers or the strands undergo only a collective torsion and do not undergo individual torsion around their own axis.

 [048] In one embodiment, the wire element is metallic.

[049] Optionally, the wire element is metallic and comprises several monofilaments and is of the type gummed in situ, that is to say that the metallic wire element is gummed from the inside, during its manufacture even by an eraser filling. Such metallic wire elements are known to those skilled in the art. The composition of the filling compound may be identical to the composition of the sheath.

 [050] Preferably, the wire element or elements are sheathed in line, that is to say that the wire element or elements are sheathed by the sheath during the manufacture of the reinforcing element.

 [051] Advantageously, the sheath directly covers the wire element or elements. By directly, it is meant that the wire element or elements and the sheath are in contact with each other.

 [052] The subject of the invention is also a tire comprising a reinforcing element extending in a main direction and embedded in a coating rubber mass, the reinforcing element comprising:

 at least one wire element coated with a polymer sheath, and

at least one circumferential and / or axial mechanical anchoring element of the coating rubber mass, the circumferential and / or axial mechanical anchoring element being formed in or on the polymer sheath.

[053] In the baked tire, the coating rubber mass is fired.

Another object of the invention is a method of manufacturing a tire-reinforced rubber product comprising a reinforcing element extending in a main direction and embedded in a coating rubber mass, wherein:

 at least one wire element is coated with a polymer sheath;

 at least one circumferential and / or axial mechanical anchoring element of the coating rubber mass is formed in or on the polymer sheath to form the reinforcing element; and

 the reinforcement element is embedded in the coating rubber mass.

[055] The rubber-reinforced product defined above is obtainable by this process.

[056] The invention also relates to a manufacturing facility for a tire-reinforced rubber product comprising a reinforcement element extending in a main direction and embedded in a coating rubber mass, the installation comprising :

 means for sheathing at least one filament element with a polymer sheath, the cladding means comprising a hole for shaping the polymer sheath having a contour arranged so that the reinforcing element comprises at least one element circumferentially and / or axially mechanical anchoring of the coating rubber mass in or on the polymer sheath; and

 means for coating the reinforcing element with the coating rubber mass.

 [057] The invention will be better understood on reading the description which follows, given solely by way of non-limiting example and with reference to the drawings in which:

 Figure 1 is a sectional view of a tire according to the invention;

- Figure 2 is a sectional view of a rubber reinforced product according to the invention comprising a plurality of reinforcing elements according to a first embodiment;

 Figure 3 is a perspective view of a reinforcing member of Figure 2; Figure 4 is a projection view in the main direction of the reinforcing member of Figure 2;

FIGS. 5 and 6 illustrate a manufacturing facility according to the invention of a reinforcement element for pneumatic tires;

 Figures 7 and 8 are views similar to that of Figure 4 of reinforcing elements according to second and third embodiments;

 Figures 9 and 10 are views similar to those of Figures 3 and 4 of a reinforcing element according to a fourth embodiment;

 Figure 11 is a view similar to that of Figure 4 of a reinforcing member according to a fifth embodiment;

 Figure 12 is a view similar to that of Figure 3 of a reinforcing member according to a sixth embodiment;

FIG. 13 is a view along the direction XII of the reinforcing element of FIG. 12;

 Figure 14 is a view similar to that of Figure 3 of a reinforcing member according to a seventh embodiment.

 [058] There is shown in Figure 1 a tire according to the invention and designated by the general reference 1.

 [059] The tire 1 is preferably intended for industrial vehicles chosen from vans, heavy vehicles such as "heavy goods vehicles" - ie, metro, buses, road transport vehicles (trucks, tractors, trailers), off-the-road vehicles. road -, agricultural or civil engineering machinery, aircraft, other transport or handling vehicles. Alternatively, the tire 1 is intended for passenger vehicles or two-wheeled vehicles.

 [060] The tire 1 has a vertex 2 reinforced by a crown reinforcement 3, two sides 4 and two beads 5, each of these beads 5 being reinforced with a rod 6. The top 2 is surmounted by a tread not represented in this schematic figure. A carcass reinforcement 7 is wrapped around the two rods 6 in each bead 5 and comprises a reversal 8 disposed for example towards the outside of the tire 1. The crown reinforcement 3 comprises a crown ply 9.

[061] There is shown in Figure 2 a reinforced rubber product 10 used for the manufacture of the tire 1. The rubber-reinforced product 10 of FIG. 2 is intended to form the crown ply 9 after vulcanization of the tire 1. The rubber-reinforced product 10 is therefore represented in its green state, that is to say before the vulcanization of the tire 1. Alternatively, the rubber-reinforced product 10 could be intended to form a carcass ply of the carcass reinforcement 7. [062] The rubber-reinforced product 10 comprises a plurality of reinforcing elements 12 embedded in a coating rubber mass 14. The rubber-reinforced product 10 has the general shape of a strip extending in a longitudinal direction. The width L and the height h of the rubber-reinforced product are such that L> h, preferably L> 10h. The reinforcing elements 12 are distributed substantially evenly along the width of the rubber-reinforced product 10, i.e. they are equidistant in pairs according to the width of the rubber-reinforced product 10.

 [063] The coating rubber mass 14 conventionally comprises a diene elastomer, for example natural rubber, a reinforcing filler, for example carbon black and / or silica, a crosslinking system, for example a vulcanization system preferably comprising sulfur, stearic acid and zinc oxide, and optionally an accelerator and / or a vulcanization retarder.

[064] In the following figures, X, Y, Z directions are represented corresponding to axial (X), radial (Y) and circumferential (Z) orientations of a reinforcing element.

 [065] There is shown in Figures 2 and 3 a reinforcing element 12 according to a first embodiment. In the embodiments illustrated in FIGS. 6 to 13, elements similar to those illustrated in FIGS. 2 and 3 are designated by identical references.

 [066] The reinforcing element 12 (assumed rectilinear and at rest) extends in a main direction A substantially parallel to the axial direction X.

[067] The reinforcing element 12 comprises at least one wire element 16, in this case a single wire element 16. The reinforcing element 16 also comprises a polymer sheath 18 directly coating the wire element 16. Here, the wire element 16 is metallic. Alternatively, the wire element 16 may be textile.

 [068] In this case, the sheath 18 of polymer is made in a composition comprising a thermoplastic polymer, here an aliphatic polyamide, more specifically polyamide 6,6 commonly called nylon. Alternatively, the sheath 18 is made of a composition comprising an elastomer, preferably a diene elastomer, here natural rubber.

[069] The sheath 18 is coated with an adhesion layer (not shown), here an adhesive layer of the RFL type. [070] In addition, the reinforcing element 12 comprises at least one circumferential and / or mechanical mechanical anchoring element 22 of the coating rubber mass 14 formed in or on the sheath 18.

 [071] The metallic wire element 16 here comprises a layered cable 24 comprising an inner layer 26 comprising a metal monofilament F1 and an outer layer 28 comprising six metal monofilaments F2. The metal monofilaments F1, F2 of the cable 24 are assembled by wiring or twisting.

[072] The reinforcing element 12 comprises several circumferential mechanical anchoring elements 22 of the mass 14. Thus, it prevents any movement of the sheath 18 and the coating rubber mass 14 with respect to the other in the circumferential direction Z.

 [073] Each circumferential mechanical anchoring element 22 is formed in the sheath 18. The circumferential mechanical anchoring elements 22 are distributed circumferentially in the sheath 18.

[074] Each circumferential mechanical anchoring element 22 comprises a circumferential mechanical anchoring cavity 30 formed in the sheath 18. Each circumferential mechanical anchorage cavity 30 forms a groove 32 extending substantially parallel to the main direction A. In FIG. the species, each groove 32 has, in a plane perpendicular to the main direction A, a substantially polygonal section, here triangular.

 [075] In a plane perpendicular to the main direction A, the sheath 18 is delimited by a concave contour C, that is to say non-convex.

[076] There is shown in Figures 4 and 5 a manufacturing facility of the reinforcing element 12 and designated by the general reference 40.

[077] The installation 40 comprises means 42 for supplying the wire element 16, means 44 for assembling the wire element 16, means 46 for heating the wire element 16, means 48 for sheathing of the wire element 16, means 50 for cooling the reinforcing element 12 and means 52 for coating the element 12 with the rubber mass 14.

[078] The power supply means 42 comprise supply coils 54, 55 respectively monofilaments F1 and F2. The assembly means 44 comprise a distribution grid 56 coupled to an assembly grain 58. The heating means 46 comprise an induction furnace 60. The cooling means 50 comprise a water bath 62. coating 52 comprise a calender 64 delivering two rubber skims forming mass 14. [079] The cladding means 48 comprise an extruder 66 delivering the composition of the sheath 18. The cladding means 48 also comprise a hole 68 for shaping the sheath 18 shown in FIG.

 [080] The shaping orifice 68 has a contour C complementary to the contour C of the sheath 18. The contour C is thus arranged so that the reinforcing element 12 comprises the elements 22 of circumferential mechanical anchoring of the mass 14.

 [081] We will now describe a method of manufacturing the reinforcing element 12.

[082] By means of the installation 40, in particular means 42 to 44, the wire element 16 is first manufactured.

 [083] Then, the wire element 16 is jacketed with the sheath 18 in the means 48.

 [084] Next, the circumferential mechanical anchoring elements 22 are housed in the sheath by means of the shaping orifice 68.

 [085] Finally, the reinforcement element 12 is embedded in the mass 14 of coating rubber by means of the shell 64.

 [086] Note that the reinforcing element 12 is obtainable by the method described above.

 [087] FIGS. 6 and 7 show a reinforcement element respectively according to second and third embodiments.

[088] Unlike the first embodiment, the circumferential mechanical anchoring elements 22 of the reinforcing elements 12 according to the second and third embodiments are arranged to anchor the sheath 18 and the rubber mass radially. coating 14 relative to each other. Thus, it prevents any movement of the sheath 18 and the coating rubber mass 14 relative to each other in the radial direction Y.

 [089] Indeed, each circumferential mechanical anchoring element 22 has, in a plane perpendicular to the main direction A, a variable section in which the circumferential dimension d1 of a first portion P1 of the circumferential mechanical anchoring element 22, here the groove 32, is greater than the circumferential dimension d2 of a second portion P2 of the circumferential mechanical anchoring element 22, the first portion P1 being radially internal with respect to the second portion P2.

[090] FIGS. 8 and 9 show a reinforcing element according to a fourth embodiment. [091] Unlike the first embodiment, each circumferential mechanical anchoring element 22 of the reinforcing element 12 according to the fourth embodiment is formed on the sheath 18 and is integral with the sheath 18.

[092] Each circumferential mechanical anchoring element 22 comprises a circumferential mechanical anchoring projection 31 formed on the sheath. Each circumferential mechanical anchoring projection 31 forms a rail 33 extending substantially parallel to the main direction A.

 [093] There is shown in Figure 10 a reinforcing element according to a fifth embodiment.

[094] Unlike the fourth embodiment, each circumferential mechanical anchoring element 22 of the reinforcing element 12 according to the fifth embodiment is arranged to anchor the sheath 18 and the rubber mass radially. coating 14 relative to each other.

 [095] Indeed, each circumferential mechanical anchoring element 22 has, in a plane perpendicular to the main direction A, a variable section in which the circumferential dimension d1 of a first portion P1 of the circumferential mechanical anchoring element 22, here the rail 33, is greater than the circumferential dimension d2 of a second portion P2 of the circumferential mechanical anchoring element 22, the first portion P1 being radially external with respect to the second portion P2.

 [096] FIGS. 11 and 12 show a reinforcing element according to a sixth embodiment.

 [097] Unlike the first embodiment, each mechanical anchoring element 22 of the reinforcing element 12 according to the sixth embodiment allows an axial mechanical anchoring of the mass 14 with respect to the sheath 18. Thus, it prevents any movement of the sheath 18 and the coating rubber mass 14 relative to each other in the axial direction X.

 [098] Each axial mechanical anchoring element 22 comprises a projection axially mechanical anchoring 31 formed on the sheath 18, here a rail 33 extending substantially parallel to the circumferential direction Z. The axial mechanical anchoring elements 22 are distributed axially on the sheath 18.

 [099] In a variant, each mechanical anchoring element 22 could be an axial mechanical anchoring groove formed in the sheath 18.

[0100] FIG. 13 shows a reinforcing element according to a seventh embodiment. Unlike the previous embodiments, each mechanical anchoring element 22 of the reinforcing element 12 according to the seventh embodiment allows a circumferential and axial mechanical anchoring of the mass 14 with respect to the sheath 18.

Each circumferential and axial mechanical anchoring element 22 comprises a cavity 31 formed in the sheath 18. The cavities 31 are distributed circumferentially and axially in the sheath 18. Each cavity 31 is punctual.

As a variant, each circumferential and axial mechanical anchoring element 22 could be a circumferential and axial mechanical anchoring projection 31 formed in the sheath 18.

 The invention is not limited to the embodiments described above.

The reinforcing element may also comprise a tire bead wire.

 In the case where the reinforcing element comprises a row of several wire elements, the wire elements are coated with a common sheath. The row comprises the wire elements juxtaposed to each other and coated with the common sheath.

 It may also provide a reinforcing element comprising cavities and mechanical anchoring projections, whether point or not, they allow a circumferential or axial anchoring or both.

 The various embodiments described above may be combined to the extent that these embodiments are compatible with each other.

Claims

1. Reinforced rubber product (10) for a tire, characterized in that it comprises a reinforcing element (12) extending in a main direction (A, X) and embedded in a mass (14) of coating rubber, the reinforcing element (12) comprising:  at least one wire element (16) coated with a polymer sheath (18), and at least one element (22) for circumferential and / or axial mechanical anchoring of the coating rubber mass (14), the circumferential and / or axial mechanical anchoring element (22) being provided in or on the polymer sheath (18).  2. Reinforced rubber product (10) according to the preceding claim, wherein the reinforcing element (12) comprises a plurality of circumferential and / or axial mechanical anchoring elements (22) distributed respectively circumferentially and / or axially in or on the polymer sheath (18).  A rubber reinforced product (10) according to any one of the preceding claims, wherein the circumferential and / or axial mechanical anchoring member (22) comprises a circumferential and / or axial mechanical anchorage cavity (30). formed in the polymer sheath (18).  4. Reinforced rubber product (10) according to the preceding claim, wherein the cavity (30) mechanical anchoring circumferential and / or axial form a groove (32) extending substantially parallel to the respectively principal direction (A, X ) and / or circumferential (Z).  A rubber reinforced product (10) according to any one of the preceding claims, wherein the circumferential and / or axial mechanical anchoring member (22) comprises a circumferential and / or axial mechanical anchoring projection (31). formed on the polymer sheath (18).  6. reinforced rubber product (10) according to the preceding claim, wherein the projection (31) of circumferential and / or axial mechanical anchoring forms a rail (33) extending substantially parallel to the respectively principal direction (A, X ) and / or circumferential (Z). A rubber reinforced product (10) according to any one of the preceding claims, wherein the circumferential and / or axial mechanical anchoring member (22) is arranged to radially anchor the polymer sheath (18) and the mass (14) of coating rubber with respect to each other. 8. Pneumatic tire (1), characterized in that it comprises a reinforcing element (12) extending in a main direction (A, X) and embedded in a mass (14) of coating rubber, the element reinforcement (12) comprising:  at least one wire element (16) coated with a polymer sheath (18), and at least one element (22) for circumferential and / or axial mechanical anchorage of the mass (14) of coating rubber, the circumferential and / or axial mechanical anchoring element (22) being provided in or on the polymer sheath (18).  A method of manufacturing a tire reinforced rubber product (10) comprising a reinforcing element (12) extending in a main direction (A, X) and embedded in a mass (14) of coating rubber characterized in that  at least one wire element (16) is coated with a polymer sheath (18);  at least one circumferential and / or axial mechanical anchor element (22) of the coating rubber mass (14) is formed in or on the polymer sheath (18) to form the reinforcing element (12); and  the reinforcing element (12) is embedded in the mass (14) of coating rubber.  10. Installation (40) for manufacturing a semi-finished product (10) for a tire comprising a reinforcing element (12) extending in a main direction (A, X) and embedded in a mass (14) of rubber coating, characterized in that it comprises:  means (48) for sheathing at least one wire element (16) with a polymer sheath (18), the sheathing means (48) comprising a hole (68) for shaping the polymer sheath (18); ) having a contour (C) arranged so that the reinforcing element (12) comprises at least one element (22) for circumferential and / or axial mechanical anchorage of the mass (14) of coating rubber provided in or on the polymer sheath (18); and  coating means (52) of the reinforcing element by the mass (14) of coating rubber.