The present invention relates to elastomeric compositions and compounds for tyres, comprising a novel secondary cross-linking system comprising at least one methylene donor agent of formula (I) wherein R1 is ethyl and at least one phenolic resin as a methylene acceptor agent, and vehicle wheel tyres comprising them. The new secondary cross-linking system of the invention allows imparting the materials optimal stiffness, thermal stability, breaking strength and adhesion to the reinforcement elements, improving the cross-linking kinetics and the processability of the compound, while at the same time reducing or maintaining the hysteresis. These materials which include this cross-linking system, which is more harmless than conventional ones because it is free of resorcinol, formaldehyde and similar substances, are advantageously used in those tyre components that require a certain rigidity and resistance to breakage and/or high adhesion to textile or metal reinforcement elements together with a low rolling resistance.
The present invention relates to elastomeric compositions and compounds for tyres, comprising a novel secondary cross-linking system comprising at least one methylene donor agent of formula (I) and at least one methylene acceptor agent, and tyres for vehicle wheels comprising them. The new secondary cross-linking system of the invention allows imparting the materials optimal stiffness, breaking strength and adhesion to the reinforcement elements, improving the cross-linking kinetics and the processability of the compound, while at the same time reducing or maintaining the hysteresis. These materials are advantageously used in those tyre components that require a certain rigidity and resistance to breakage and/or high adhesion to textile or metal reinforcement elements together with a low rolling resistance.
A process for transferring an annular component (C) used in building tyres comprises arranging a preparation drum (2) extended around a rotation axis (X), winding a semi-finished product according to a substantially annular or cylindrical shape around said preparation drum (2) so as to manufacture an annular component (C) of a tyre, removing the preparation drum (2) from the annular component (C) by axially moving said preparation drum (2) and supporting the annular component (C) by a support device (3) concurrently with said removal.
Method and system (99) for detecting an interaction condition (IC) of a tyre (3) with a surface (900), wherein the system (99) comprises a monitoring device (4) fixed to an inner surface (5) of the tyre (3) at a crown portion (6) and configured to acquire a radial acceleration signal (AS) from the crown portion (6), and a processing unit (8) in communication with the monitoring device (4) and programmed to receive from the monitoring device (4) the radial acceleration signal (AS) and to perform the following steps of the method: calculating an adjustment factor Af according to the formula Af = ASavg + w2R*, where ASavg is an average value of the radial acceleration signal (AS), w is the angular velocity of the tyre, and R* is a parameter representative of a radius of the tyre (3); obtaining an adjusted radial acceleration signal (ASa) by a difference between the radial acceleration signal (AS) and the adjustment factor (Af); detecting the interaction condition (IC) as a function of the adjusted radial acceleration signal (ASa).
A vehicle tyre with an asymmetric internal structure and external profile relative to its middle line plane. When mounted on a rim and installed with a camber angle, the rotating tyre generates lateral forces during straight-line running: a camber force from the wheel's inclination, a structural force from the asymmetric internal construction, and a conicity force from the asymmetric external profile. The conicity force opposes the camber force direction, and its magnitude remains below the structural force magnitude. This configuration enables control of the resulting lateral force while reducing rolling resistance during straight-line operation.
Method and system (99) for detecting an aquaplaning condition (IC) of a tyre (3) with a surface (900), wherein the system (99) comprises a monitoring device (4) fixed to an inner surface (5) of the tyre (3) at a crown portion (6) and configured to acquire a radial acceleration signal (AS) from the crown portion (6), and a processing unit (8) in communication with the monitoring device (4) and programmed to receive from the monitoring device (4) the radial acceleration signal (AS) and to perform the following steps of the method: obtaining an adjustment factor (Af) representative of an offset between one or more acquired values of radial acceleration and respective current values; obtaining an adjusted radial acceleration signal (ASa) by a difference between the radial acceleration signal (AS) and the adjustment factor (Af); identifying, in the adjusted radial acceleration signal (ASa), a sub-portion (ASaP) of the signal corresponding to a passage of the crown portion (6) internally to a footprint portion of the tyre (3); calculating a comparison parameter (RV) as a function of an average value (mASa) of the signal (ASa) in the sub-portion (ASaP); detecting the aquaplane condition (IC) as a function of a comparison between the comparison parameter (RV) and at least one threshold value.
The present invention relates to a self-sealing tyre for vehicle wheels comprising at least one carcass ply, a tread band applied in a radially external position with respect to said carcass ply in a crown portion, at least one liner applied in a radially internal position with respect to said carcass ply, a sealing assembly applied in a radially internal position with respect to said liner and axially extending at least at a part of the crown portion; wherein said sealing assembly comprises a permanent multilayer self-supporting film comprising at least two outer layers of polyamide and at least one inner layer of polyolefin, wherein said multilayer self-supporting film has a residual relaxation strength of between 1 MPa and 20 MPa, preferably between 5 MPa and 15 MPa, and a layer of sealing material associated with and supported by said permanent multilayer self-supporting film; wherein said permanent multilayer self-supporting film is radially internal to the layer of sealing material and said layer of sealing material is placed substantially in contact with said liner.
B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
B60C 5/14 - Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
B60C 19/00 - Tyre parts or constructions not otherwise provided for
A motorcycle tyre comprises a tread band having a central annular portion (A) extending astride of an equatorial plane (X-X) of the tyre and two lateral annular portions arranged on opposite sides with respect to the central annular portion (A). The central annular portion (A) comprises a plurality of circumferential grooves (20; 60) each having an intermediate portion (21; 61) and two end portions (22, 23; 62, 63) arranged on opposite sides with respect to the intermediate portion (21; 61) along a circumferential direction. The intermediate portion (21; 61) has a width (W1a) less than the maximum width (W1b, W1c) of each of the two end portions (22, 23; 62, 63).
A motorcycle tyre comprises a tread band (8) having a plurality of main grooves (20; 60) arranged on opposite sides with respect to an equatorial plane (X-X) of the tyre and a void to solid ratio greater than 10%. Each of said main grooves (20; 60) comprises a first rectilinear portion (21; 61) inclined with respect to the equatorial plane (X-X) by a first angle (α) less than 45° and having an end (21a; 61a) proximal to the equatorial plane (X-X) and an end (21b; 61b) distal from the equatorial plane (X-X). Each of said main grooves (20; 60) further comprises a second rectilinear portion (22; 62) inclined with respect to said first rectilinear portion (21; 61) by a second angle (β) comprised between 90° and 160° and having an end (22a; 62a) proximal to the equatorial plane (X-X) and an end (22b; 62b) distal from the equatorial plane (X-X). Said second rectilinear portion (22; 62) is shorter than said first rectilinear portion (21; 61).
Control method and system (99) of a vehicle (1) moving on a road surface, wherein the system comprises a detection module (2) for detecting in real time a respective hydroplaning intensity (HI) for each tyre (3) of the vehicle (1), an actuation device (9) connected to each wheel (7) of the vehicle (1) and a command and control unit (8) programmed and configured for performing the control method comprising:—comparing each respective hydroplaning intensity (HI) with a first threshold;—upon the occurrence of a starting condition such that the respective hydroplaning intensity (HI) of at least one tyre (3) reaches the first threshold, then:—calculating in real time a reference value (YRr) of a parameter representative of a lateral motion of the vehicle (1) as a function of a longitudinal speed (Vxc) and of a steering angle (STA) of the vehicle;—calculating in real time a corrective moment (Mz) as a function of the reference value (YRr) and of a current value (YRc) of the parameter detected in real time;—applying in real time to each wheel (7) a respective torque (Tr) calculated in real time as a function of the corrective moment (Mz) and of the hydroplaning intensity (HI) of the respective tyre (3).
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
B60W 10/18 - Conjoint control of vehicle sub-units of different type or different function including control of braking systems
A tyre for vehicle wheels includes a tread band having a first annular portion delimited by two circumferential channels. The first annular portion includes two annular grooves extending along respective zig-zag paths. Each of the two annular grooves is defined by a plurality of first parts inclined on one side with respect to a reference plane orthogonal to an equatorial plane of the tyre and by a plurality of second parts inclined with respect to the reference plane on the opposite side to the first parts. Each of the second parts is circumferentially interposed between two respective first parts. Each of the first parts is connected to a respective circumferential channel by a respective first transversal groove arranged at an intermediate portion of the first part and by a respective second transversal groove arranged at an end of the first part.
In the manufacturing of a tyre for vehicles, one or more stratified annular components are obtained, by arranging, around a central geometric axis (X), a radially outer annular layer (7a) with toroidal shape having a concavity directed towards the central geometric axis (X). Against the radially outer annular layer (7a), a radially inner annular layer (7b) with toroidal shape is then applied, having a convexity directed away from the central geometric axis (X). Before applying the radially inner annular layer (7b), axially opposite end flaps (26) of the radially outer layer (7a) are mutually moved apart.
In a process for building tyres for vehicle wheels, at least one tread band (9) or other elastomeric component of a tyre (2) is made by applying at least one continuous elongated element (14) according to a plurality of turns (C) around a forming drum (15) rotating around a geometric rotation axis (X) thereof. The continuous elongated element (14) is made by the action of extruding a first material through an extrusion nozzle (16), to form an inner core (33) of said continuous elongated element (14) exiting from an outlet opening (18) of the extrusion nozzle (16). During the extrusion, a second material different from the first material is conveyed around the first material, at the extrusion nozzle (16) and upstream of the outlet opening (18), to form a coating layer (32) which entirely surrounds the inner core (33).
B29C 48/305 - Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
B29C 48/49 - Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
Method for producing a vulcanization mold for a tyre for vehicle wheels comprising a plurality of sectors wherein each sector comprises a molding surface of a tread band portion of the tyre, said method comprising for each sector: - making by means of a digitally controlled apparatus (110) at least one surface portion of said molding surface with a surface roughness starting from a digital model wherein said surface roughness is defined through a predetermined algorithm.
Tyre (2) for vehicle wheels comprising a tread band (9) with a tread surface comprising at least one surface portion with a surface roughness wherein: said surface portion with said surface roughness has a power spectral density described by a curve that represents the power spectral density as a function of the wave number, the power spectral density in m4and the wave number in m-1 being expressed in logarithmic units in base 10; said curve comprises an intermediate region that extends for a predetermined range of wave numbers from an initial wave number value up to a final wave number value, said range of wave numbers in said curve being equal to 0.20 and said initial wave number value being comprised in said curve between 3.6 and 4.5; said curve comprises two points that represent the power spectral density value at the initial wave number value and at the final wave number value, wherein a straight line that joins the two points has a negative angular coefficient that in absolute value is greater than or equal to 6.
The present invention relates to a vulcanization mold for a tyre (2) for vehicle wheels and a method for producing such a mold. The mold comprises a molding surface of tread band (9) of the tyre (2), at least one surface portion of said molding surface of tread band having a surface roughness, wherein: - said surface portion with said surface roughness has a power spectral density described by a curve that represents the power spectral density as a function of the wave number, the power spectral density in m4 and the wave number in nr 1 being expressed in logarithmic units in base 10; - said curve comprises an intermediate region that extends for a predetermined range of wave numbers from an initial wave number value up to a final wave number value, said range of wave numbers in said curve being equal to 0.20 and said initial wave number value being comprised in said curve between 3.6 and 4.5; - said curve comprises two points that represent the power spectral density value at the initial wave number value and at the final wave number value, wherein a straight line that joins the two points has a negative angular coefficient that in absolute value is greater than or equal to 6.
A tyre (1) comprising, in a radially outer position, a tread band (2) on which a tread surface (3) is defined. The aforementioned tread band (2) includes a plurality of grooves (7A, 7B), each comprising a first wall (71) and a second wall (72) facing each other and defining a groove width (WG). At least one of the first wall (71) and the second wall (72) includes a plurality of protrusions (8) projecting from at least one of the first wall (71) and the second wall (72) with a protrusion width (WP), wherein the protrusion width (WP) is less than 20% of the groove width (WG).
A tyre (1) for motorcycle wheels is described comprising an equatorial plane (XX) and a tread band (8) extending according to an axial development (L), wherein the tread band (8) comprises, in a plan development thereof, a central annular portion (L1) arranged astride of the equatorial plane (X-X) of the tyre (1) and two lateral annular portions (L2, L3) arranged on opposite sides of the central annular portion (L1) with respect to the equatorial plane (X-X) of the tyre (1). The tread band (8) also comprises at least one longitudinal groove (20) formed in the central annular portion (L1) and a plurality of transversal grooves (33) substantially parallel to one another, formed in the lateral annular portions (L2, L3) of the tread band (8). The transversal grooves (33) obliquely extend with respect to the equatorial plane (X-X) of the tyre (1) according to an angle of inclination comprised between 40° and 75° with respect to the equatorial plane (X-X) and form therebetween a circumferential succession of transversal ribs (34) which extend up to the axial ends of the tread band. An axially inner end (33a) of the transversal grooves (33) is arranged at a predetermined distance (d) from the longitudinal groove (20) so as to form a circumferential solid portion (35) of tread band (8), axially arranged between the axially inner end (33a) of the transversal grooves (33) and the longitudinal groove (20), and integrally formed with the transversal ribs (34).
A tyre (1) for vehicle wheels comprises a tread band (2) which extends between a first axial end (4a) and a second axial end. There are defined on the tread band a plurality of first grooves (10) which are arranged in succession along a first shoulder region (7), a plurality of second grooves (20) which are arranged in succession along a second shoulder region (8), and a plurality of third grooves (30). Each third groove extends from a respective first end (31) which is defined between an equatorial plane (X) and a first axial end (4a) of the tread band as far as a respective second end (32) which is defined between the equatorial plane (X) and a second axial end (4b) of the tread band. Furthermore, each third groove is inclined at an angle (A) between 8° and 30° with respect to a circumferential direction defined on the tread band (2).
Car tyre (100) having a tread band (7) comprising a central region (L1) and two shoulder regions (L2, L3); the central region (L1) having a plurality of ribs (8, 9, 10), wherein a first rib (8) with a plurality of first transverse grooves (15) comprising a substantially straight first segment (15′), inclined relative to a direction parallel to said equatorial plane (X-X) so as to form an angle Θ smaller than or equal to 70°, a substantially straight counter-inclined second segment (15″) and a curved connecting segment (15″′) extending between said first segment (15′) and said second segment (15″); —the first rib (8) further comprising first straight sipes (21) located in the first rib (8) between said first transverse grooves (15) and extending over at least 60% of the width of said first rib (8); the first sipes (21) forming with said equatorial plane (X-X) an angle Θ′ preferably equal to the angle Θ of the first segment (15′) of the first transverse grooves (15).
The present invention relates to new polyurethane or polyurea organic reinforcing fillers for elastomeric tyre compounds, tyre components and tyres for vehicle wheels that comprise them. Advantageously these organic fillers allow reducing the weight of the elastomeric compounds that include them and confer to the materials a hysteresis that is in line or even lower, moduli stable at different temperatures, and high load/elongation at break.
B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
B60C 11/00 - Tyre tread bandsTread patternsAnti-skid inserts
C08G 18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
C08G 18/28 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
A tyre for motor vehicles comprises a carcass structure (2) comprising a first carcass ply (3) and a second carcass ply (4), a reinforcing layer (8) comprising at least one reinforcing cord (9) wound in a plurality of circumferential coils and arranged in a radially outer position to the carcass structure (2) and in contact with the carcass structure (2), a tread band (10) applied in a radially outer position to the reinforcing layer (8) and in contact with the reinforcing layer (8). The first carcass ply (3) has a first end flap (3A) engaged with a first annular anchoring structure (5A) and a second end flap (3B) spaced from a second annular anchoring structure (5B). The second carcass ply (4) has a first end flap (4A) engaged with the second annular anchoring structure (5B) and a second end flap (4B) spaced from the first annular anchoring structure (5A). The first carcass ply (3) and the second carcass ply (4) are superimposed on each other in an overlapping area located below the tread band (10).
B60C 9/10 - Carcasses the reinforcing cords within each carcass ply arranged in a crossing relationship
B60C 9/18 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
B60C 9/22 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
B29D 30/30 - Applying the layersGuiding or stretching the layers during application
32.
TYRE FOR MOTOR VEHICLES AND PROCESS FOR BUILDING A TYRE FOR MOTOR VEHICLES
A tyre for motor vehicles comprises a carcass structure (2) comprising a first carcass ply (3) and a second carcass ply (4), a reinforcing layer (8) comprising at least one reinforcing cord (9) wound in a plurality of circumferential coils and arranged in a radially outer position to the carcass structure (2) and in contact with the carcass structure (2), a tread band (10) applied in a radially outer position to the reinforcing layer (8) and in contact with the reinforcing layer (8). The first carcass ply (3) has a first end flap (3A) engaged with a first annular anchoring structure (5A) and a second end flap (3B) spaced from a second annular anchoring structure (5B). The second carcass ply (4) has a first end flap (4A) engaged with the second annular anchoring structure (5B) and a second end flap (4B) spaced from the first annular anchoring structure (5A). The first carcass ply (3) and the second carcass ply (4) are superimposed on each other in an overlapping area located below the tread band (10).
B60C 9/18 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
B60C 9/22 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
33.
PROCESS FOR THE PREPARATION OF DIKETONES AND PYRROLE DERIVATIVES
The present invention relates to a process for the preparation of diketones and pyrrole derivatives, optionally substituted in the 2 and/or 5 positions, from furans.
C07C 45/59 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds from heterocyclic compounds with oxygen as the only hetero atom in five-membered rings
C07D 207/325 - Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms with substituted hydrocarbon radicals directly attached to the ring nitrogen atom
34.
TYRE FOR MOTOR VEHICLES AND PROCESS FOR BUILDING A TYRE FOR MOTOR VEHICLES
A tyre for motor vehicles comprises a carcass structure (2) comprising a first carcass ply (3) and a second carcass ply (4), a reinforcing layer (8) comprising at least one reinforcing cord (9) wound in a plurality of circumferential coils and arranged in a radially outer position to the carcass structure (2) and in contact with the carcass structure (2), a tread band (10) applied in a radially outer position to the reinforcing layer (8) and in contact with the reinforcing layer (8). The first carcass ply (3) has a first end flap (3A) engaged with a first annular anchoring structure (5A) and a second end flap (3B) spaced from a second annular anchoring structure (5B). The second carcass ply (4) has a first end flap (4A) engaged with the second annular anchoring structure (5B) and a second end flap (4B) spaced from the first annular anchoring structure (5A). The first carcass ply (3) and the second carcass ply (4) are superimposed on each other in an overlapping area located below the tread band (10).
B60C 9/22 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
B29D 30/30 - Applying the layersGuiding or stretching the layers during application
A motorcycle tyre, comprising a radial carcass structure (2) and a tread band (8) applied at a radially outer position with respect to the radial carcass structure (2), wherein the radial carcass structure (2) comprises a first carcass ply (3a) and a second carcass ply (3b) including a first plurality of textile reinforcing cords (30) and a second plurality of textile reinforcing cords (32), respectively, wherein the first textile reinforcing cords (31) are parallel to each other and the second textile reinforcing cords (33) are parallel to each other and have a respective first and second inclination at a crown portion (8c) of the tread band (8) with respect to an equatorial plane (X-X) of the tyre, wherein said second inclination is opposite to said first inclination. The first textile reinforcing cords (31) and the second textile reinforcing cords (33) have a tenacity comprised between 0.35 cN/Tex and 1.2 cN/Tex at 2% elongation and comprised between 0.5 cN/Tex and 3 cN/Tex at 5% elongation. At least one central annular sector (8a) of the tread band (8) arranged astride of the equatorial plane (X-X) is made of a vulcanized elastomeric material having a static elastic modulus Ca3 measured at 70° C. comprised between 9.0 and 14.0, a tandelta measured at 70° C. and 10 Hz comprised between 0.120 and 0.160, and a dynamic elastic modulus F measured at 70° C. and 10 Hz comprised between 3.7 and 4.1.
B60C 9/06 - Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship the cords extend diagonally from bead to bead and run in opposite directions in each successive carcass ply, i.e. bias angle ply
B60C 9/04 - Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
36.
PROCESS AND APPARATUS FOR LABELLING A GREEN TYRE FOR BICYCLES
The invention relates process and an apparatus for labeling a green bicycle tire. The process comprises-fitting a tyre (2) around a support table (11): —positioning, in a pressing area (23) arranged on the support table (11), a tread junction (6a) carried by the tyre (2) fit around the support table (11); —applying at least one label (32) on the tyre (2); —pressing the tread junction (6a) during the application of said at least one label (32).
A process for making a reinforcing cord for tyres for vehicle wheels comprises providing at least one semi-finished product (15) comprising at least one sacrificial elongated element (20) and at least two elongated elements (11a, 11b) made of non-metallic material, wherein said at least one first elongated element (11a) of said at least two elongated elements (11a, 11b) and said at least one sacrificial elongated element (20) extend along a helical path with a predetermined helix pitch (E), and removing the at least one sacrificial elongated element (20) from the at least one semi-finished product (15). A reinforcing cord (10) is thus obtained having an empty space (10a) previously occupied by the at least one sacrificial elongated element (20) and wherein said at least one first elongated element (11a) extends together with said empty space (10a) along said helical path with said predetermined helix pitch (E).
During the making of tyres for vehicles, one or more multilayer annular components (7) are formed, each comprising annular layers (7a, 7b) radially superimposed on each other. One or more of the annular layers (7a, 7b) are made through respective forming cycles, each comprising: a) winding a semifinished product (S) according to a substantially cylindrical conformation around a building drum (13) comprising two half-drums (15) mutually aligned along a rotation axis (X); b) mutually moving away said half-drums along the rotation axis (X) by partially extracting them from the semifinished product, in order to generate or enlarge an annular opening (16) between the mutually moved-apart half-drums; c) radially expanding, through the annular opening (16), a profiler drum (17) coaxial with the building drum (13) in order to shape the semifinished product (S) according to an arched axial profile in conformity with an expansion surface (19) presented in radially outer position by the profiler drum.
A method for building a multilayer component (7) for building a tyre (2) is implemented in a station (11), wherein a radially outer layer (7a) is arranged and subjected to a shaping to form a multilayer component being processed. Subsequently, a radially inner layer (7b) is arranged and subjected to a shaping executed within the multilayer component being processed until it is incorporated thereto. In the station (11), a building drum (13) has a building surface (14) and a profiler drum (17) comprises a profiler body (18) having a shaping surface (19). The shaping surface (19) has a convex axial profile corresponding to the axial profile of the multilayer component (7). The building surface (14) is openable and closable at an axial middle line zone (M) in order to generate an annular opening (16) adapted to allow the radial passage at least of the profiler body (18).
A reinforcing cord (10) for tyres for vehicle wheels, comprising at least two elongated elements (11a, 11b) made of non-metallic material, wherein at least one elongated element (11a) extends along a helical path around an empty space (10a) with a predetermined helix pitch (E). This reinforcing cord (10) is obtained from a semi-finished product made by winding said at least one elongated element (11a) around at least one sacrificial elongated element with the predetermined helix pitch (E) and, subsequently, removing the at least one sacrificial elongated element from the semi-finished product, thus creating the aforesaid empty space (10a).
A reinforcing cord (10) for tyres for vehicle wheels, comprising at least two elongated elements (11a, lib) made of non-metallic material and twisted together, the reinforcing cord (10) extending along a non- rectilinear longitudinal trajectory, in particular an undulating longitudinal trajectory.
A reinforcing cord (10) for tyres for vehicle wheels, comprising at least one first elongated element (11a) made of a first non-metallic material and extending along a helical path with a predetermined helix pitch (E) around at least one second elongated element (11b) made of a second non-metallic material different from said first material and arranged in a radially inner position with respect to said at least one first elongated element (11a). The second material is a low modulus material.
The present invention relates to a tire for vehicle wheels comprising at least one structural component comprising at least one reinforcing element comprising an elongate member coated with, or embedded in, a vulcanised elastomeric compound obtained by vulcanising an elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and an amount of lignin equal to or greater than 25 phr. (ii) 0 to 90 phr of a diene elastomeric polymer, (iii) at least 30 phr of a carbon black reinforcing filler, (iv) optionally, a reinforcing resin comprising at least 1 phr of a methylene acceptor compound associated with at least 1 phr of a methylene donor compound, and (v) 0.1 to 12 phr of at least one vulcanising agent, wherein at least 50 phr of said diene elastomeric polymer consists of natural or synthetic isoprene rubber.
A tyre for vehicle wheels includes a tread band on which grooves are formed, which generally define a tread pattern of the tyre. At least one pitch is defined in the tread pattern. The pitch extends axially on the tread band. The total number of pitches formed on the tread band is greater than 110.
The present invention relates to a tire for vehicle wheels which comprises at least one structural component comprising at least one reinforcing element constituted by an elongate element coated with, or embedded in, a vulcanised elastomeric compound obtained by vulcanising an elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and a quantity of lignin equal to or greater than 20 phr, (ii) from 0 to 90 phr of a diene elastomeric polymer, (iii) at least 30 phr of a carbon black reinforcing filler, (iv) optionally, a reinforcing resin comprising at least 0.5 phr of a methylene acceptor compound associated with at least 0.2 phr of a methylene donor compound, (v) from 0.1 to 10 phr of carbon nanotubes, and (vi) from 0.1 to 12 phr of at least one vulcanising agent, wherein at least 50 phr of said diene elastomeric polymer is constituted by natural or synthetic isoprene rubber.
A tyre includes at least one block on which at least one complex type sipe is obtained separating the block into two portions having a first surface and a second surface facing each other. The first surface is extended between a set of first and second longitudinal sections having, respectively, a first and a second radial profile, which are symmetrical to each other, each one comprising a coupling portion between the two block portions formed by a protrusion and a recess defined by three consecutive inclined lengths, the pattern of which is such that the ends of the coupling portion are offset from each other along a direction transverse to the longitudinal direction of the sipe.
A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void/solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define a central annular portion of tread band and a pair of lateral annular portions of tread band arranged on opposite sides with respect to said central annular portion. The central annular portion of tread band comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than. 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each lateral annular portion of tread band comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).
A method for controlling the rolling resistance of a running tyre includes: manufacturing a tyre, installing the tyre on a rim, mounting a wheel on a vehicle. The tyre is manufactured by obtaining an external profile of the tyre that is asymmetric with respect to a middle line plane of the tyre and configured to generate, between the tyre rotating in rectilinear running and the ground, a lateral conicity force, conferring to the tyre the asymmetric external profile. The asymmetric external profile is obtained so as to control a resulting lateral force exchanged between the ground and the tyre and to limit a rolling resistance of the tyre running on rectilinear trajectory.
A method for checking tyres includes: arranging, at a checking device, a finished tyre that was moulded in a mould, and providing comparison data inclusive of a drawing of the mould and supplementary data. The method also includes: activating one or more detection devices to obtain a graphic representation of at least one sidewall of the finished tyre; activating a processing unit to perform a comparison between symbols included in the graphic representation and symbols defined by the comparison data; and generating, by the processing unit, a notification signal representative of a result of the comparison. A tyre checking apparatus is also described.
B29D 30/00 - Producing pneumatic or solid tyres or parts thereof
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
The present invention relates to compositions for elastomeric compounds of tires, comprising a new secondary cross-linking system comprising at least one methylenes donor agent and at least one methylenes acceptor agent selected from furoic acid, its esters or its salts, tire components and tires for vehicles wheels comprising them.
C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chainCompositions of derivatives of such polymers
C08L 77/00 - Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chainCompositions of derivatives of such polymers
51.
WORKING STATION FOR DEPOSITION OF ELEMENTARY SEMIFINISHED PRODUCTS FOR BUILDING GREEN TYRES
A working station for deposition of elementary semifinished products for building green tyres includes at least one feeding apparatus for feeding an elementary semifinished product, a forming drum, an anthropomorphic robotized arm associated with the forming drum, a control apparatus for sending movement commands to the anthropomorphic robotized arm in order to move the forming drum in a working zone, and a calibration device for calibrating the anthropomorphic robotized arm. The calibration device includes a base plate, a support rotatably mounted on the base plate, and a reference element translatably mounted on the support. The support is positionable in a plurality of first positions relative to the base plate and the reference element is positionable in a plurality of second positions relative to the support and is fixed into one position of the plurality of second positions by inserting at least one pin or screw into one slot of a plurality of slots on the cursor. The control apparatus is also configured for determining target coordinates, retrieving from a memory area a correction function, modifying the target coordinates by means of the correction function, and using processed coordinates for sending the movement commands.
A Tyre (1 includes a tread band (2) on which a plurality of blocks (8) are defined, extending transversely from a first zone (N 1) to a second zone (N2), at least one sipe (10) having a siping width (W). The sipe (10) separates the block (8) into a first portion (11) comprising a first surface (13), as well as a second portion (12) comprising a second surface (14). In a third zone (N3) located between the first zone (Nl) and the second zone (N2), at least one of the first surface (13) and the second surface (14) moves away from a respective reference plane (X, X') up to the tread surface (3), creating at least one chamfer (30). The chamfer (30) has, in correspondence with the tread surface (3), a chamfer width (Wl) of a size greater than the siping width (W).
Method (200) for detecting a position of a plurality of sensors (20) associated to a respective wheel of a vehicle (25), the method (200) comprising: —by each sensor (20), during a determined time window, wirelessly transmitting (1) a respective time sequence of packets, each packet comprising a respective identification code of the sensor (20); —by at least one receiver (21), comprising a respective antenna (23) installed on the vehicle (25) in a determined position, receiving (2) from each sensor (20), during the determined time window, a respective sub-group of packets of the respective time sequence; for each sensor (20): —determining (3, 4) a respective first number representative of an overall number of packets of the respective sub-group, and a respective second number representative of an overall number of packets of the respective time sequence of packets; —calculating (5) a respective parameter as a function of the respective first and second number; —determining (6) the position of the sensors (20) as a function of the determined position of the respective antenna (23) and as a function of a comparison between the respective parameters.
G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using radio waves
B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre
A tyre (1) comprising a tread band (2) with a plurality of three- dimensional sipes (10) defined on each block (8). Each sipe (10) separates the block (8) into a first and a second portion (11, 12) respectively comprising a first and a second surface (13, 14) extended at least partially along a first and a second reference plane (X, X') incident to the tread surface (3). Between said first and second portion (11, 12), a plurality of couplings is provided, comprising: • - at least one protrusion (15) formed on the first surface (13) and extended from the first reference plane (X) towards the second portion (12) of the block (8) up to a portion of maximum protrusion lying on a third reference plane (Y), • - at least one recess (16) formed on the second surface (14) and extended from the second reference plane (X') away from the first portion of the block (11) up to a portion of maximum recess lying on a fourth reference plane (Y'), where the third and fourth reference planes (Y, Y') are spaced by a first distance (L1) from the first and second reference planes (X, X').
The present invention relates to a tyre for vehicle wheels comprising a tread made with a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound comprising: (i) 100 phr of an elastomeric polymer composition comprising, preferably consisting of: a. at least one styrene-butadiene polymer (SBR) in an amount of from 70 to 100 phr, and b. optionally, from 0 to 30 phr of at least one elastomeric polymer selected from the group consisting of isoprene polymer (IR) and butadiene polymer (BR), (ii) from 50 to 100 phr of a mixture of resins and/or plasticising oils, (iii) at least one reinforcing filler in an amount of from 50 to 130 phr, (iv) at least one vulcanising agent in an amount of from 0.1 to 12 phr, and (v) from 0.1 to 5 phr of an organic salt of zinc having the following structural formula (I), wherein the groups R1, R2 and R3, equal or different from each other, are a hydrogen atom or a linear or branched alkyl chain comprising from 1 to 10 carbon atoms, preferably from 1 to 8 carbon atoms, and wherein the groups R1, R2 and R3 comprise a total of from 8 to 10 carbon atoms.
The present invention relates to a tyre (100) comprising a particular elastomeric compound in the underlayer (111), i.e. in the layer arranged between the tread band (109) and the belt structure (106) of the tyre.
The present invention relates to a tyre (100) comprising a particular elastomeric compound in the underlayer (111), i.e. in the layer arranged between the tread band (109) and the belt structure (106) of the tyre.
According to the invention, the tyre has a considerably reduced rolling resistance compared to known tyres, and at the same time, good road grip, excellent maneuverability and comfort.
Method and system for estimating (99) the interaction between a tyre (3) mounted on a first wheel (W1) of a vehicle (1), equipped with a command and control unit (15), and a road surface, wherein the system comprises an actuation device (9) connected to the first wheel (W1), and a processing unit (8) programmed and configured for, in response to a detection request signal (RS) of the interaction between tyre (3) and road surface generated by the command and control unit, performing the following steps of the control method: - applying a torque (Tr) to the first wheel (W1) and maintaining the second wheel (W2) in free rolling onto said road surface; - estimating a current value of a first parameter (Uc) representative of a friction between the tyre (3) and the road surface and a current value of a second parameter (Ac) representative of a slip of the tyre (3) with respect to the road surface; - estimating an available friction coefficient (Ue) between the tyre (3) and the road surface as a function of the first (Uc) and second parameter (Ac), wherein applying the torque (Tr) is performed as a function of a mounting position (P) of the first wheel (W1) on the vehicle (1) so that, as a consequence of the applying the torque (Tr), an axle of the vehicle (1) to which belongs the first wheel (W1) is more unloaded with respect to remaining axles of the vehicle due to a redistribution of a total mass of the vehicle (1).
Method and system for estimating (99) the interaction between a tyre (3) mounted on a first wheel (W1) of a vehicle (1), equipped with a command and control unit (15), and a road surface, wherein the system comprising an actuation device (9) connected to said first wheel (W1) and to a second wheel (W2) of the vehicle distinct from the first wheel (W1), and a processing unit (8) programmed and configured for, in response to a detection request signal (RS) of the interaction between tyre (3) and road surface generated by the command and control unit, performing the following steps of the control method: - applying a torque (Tr) to the first wheel (W1) and maintaining the second wheel (W2) in free rolling onto said road surface; - estimating a current value of a first parameter (Uc) representative of a friction between the tyre (3) and the road surface and a current value of a second parameter (Ac) representative of a slip of the tyre (3) with respect to the road surface; - estimating an available friction coefficient (Ue) between the tyre (3) and the road surface as a function of the first (Uc) and second parameter (Ac), - receiving as input in real time a value representative of a rate of the torque (Tr1), and commanding the actuation device (9) for applying the torque (Tr) as a function of a comparison between the value representative of the rate of the torque (Tr1) and a respective limit value (Tr'ref).
Method and system for estimating (99) the interaction between a tyre (3) mounted on a first wheel (W1) of a vehicle (1), equipped with a command and control unit (15), and a road surface, wherein the system comprises an actuation device (9) connected to said first wheel (W1) and to a second wheel (W2) of the vehicle distinct from the first wheel (W1), and a processing unit (8) programmed and configured for, in response to a detection request signal (RS) of the interaction between tyre (3) and road surface generated by the command and control unit, performing the following steps of the control method: - applying a torque (Tr) to the first wheel (W1) and maintaining the second wheel (W2) in free rolling onto said road surface; - estimating a current value of a first parameter (Uc) representative of a friction between the tyre (3) and the road surface and a current value of a second parameter (Ac) representative of a slip of the tyre (3) with respect to the road surface; - estimating an available friction coefficient (Ue) between the tyre (3) and the road surface as a function of the first (Uc) and second parameter (Ac), wherein the current value of the second parameter (Ac) is estimated as a function of a speed (Vx1) of the first wheel (W1) and of a speed (Vx2) of the second wheel (W2).
The present invention relates to a tyre, for winter, all-seasons or summer applications, characterized by a reduced wear and improved grip. Said tyre comprises a tyre component comprising a cross-linked elastomeric compound obtained from a cross-linkable elastomeric composition comprising a particular conjugated diene polymer (I).
B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
C08C 19/22 - Incorporating nitrogen atoms into the molecule
C08C 19/24 - Incorporating phosphorus atoms into the molecule
C08F 236/10 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl aromatic monomers
62.
TYRE FOR VEHICLE WHEEL WITH SUPERIOR WEAR RESISTANCE AND GRIP
The present invention relates to a tyre, for winter, all-seasons or summer applications, characterized by a reduced wear and improved grip. Said tyre comprises a tyre component comprising a cross-linked elastomeric compound obtained from a cross-linkable elastomeric composition comprising a particular conjugated diene polymer (I).
B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
C08C 19/22 - Incorporating nitrogen atoms into the molecule
C08C 19/24 - Incorporating phosphorus atoms into the molecule
C08F 236/10 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl aromatic monomers
Tyre (1) particularly suitable for applications for commercial vehicles, comprising a tread band (2) which has a plurality of blocks (7, 8) facing each other in pairs and delimited in a circumferential and/or axial direction by a first plurality of main grooves (10, 20) which extend continuously up to the opposite shoulder regions (4, 5) starting from the central region (6), where they are connected to each other and by a second plurality of main grooves (30, 40), also extending from the central region (6) towards the shoulder regions (4, 5), connected to the first main grooves (10, 20) by means of a portion (30b, 40b) preferably tapered in width until it becomes a thin connecting sipe (30c, 40c).
A monitoring of a tire is performed by using a monitoring unit operated at low frequency and with low power needs, without the need of providing complex hardware and software adapted for reconstructing a signal descriptive of the tire deformations and/or for recognizing the start and the end of peaks or valleys or other significant points of such signal. The monitoring uses a statistical approach for the estimation of the length of the contact area, or of other parameters related to it, based on an estimation of a probability of finding the monitoring unit in correspondence of the contact area at a certain time during rolling.
B60C 23/06 - Signalling devices actuated by deformation of the tyre
B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre
B60R 16/023 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for transmission of signals between vehicle parts or subsystems
A plant for building tyres for vehicle wheels is described. The plant includes a crown structure building for building crown structures on second stage forming drums, a carcass structure building line for building carcass structures on first stage forming drums, a shaping and assembly station, a first manipulator, and a second manipulator. The first manipulator is configured to manage the flow of the second stage forming drums and the second manipulator is configured to manage the flow of the first stage forming terms.
A tyre having a tread is described. The tyre has a central portion located across an equatorial plane, a first shoulder portion located towards an outer side of the tyre and a second shoulder portion located towards an inner side of the tyre. The central portion is separated from the first shoulder portion by two first circumferential grooves. The first shoulder portion and the second shoulder portion have a plurality of first transverse grooves having a first end located substantially at the respective edge of the tread, having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located.
An insert for a mould for vulcanising tyres for vehicle wheels, the insert arranged to receive in a seat formed on a moulding surface of the mould and comprising a base surface from which a plurality of projections extends; wherein, each projection comprises a lateral surface extending away from the base surface such that the lateral surface defines a tapered profile of the projection away from the base surface, is inclined at an angle between 10° and 25° with respect to a direction perpendicular to the base surface, and has a roughness between 4 and 11 μm.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Treads for re-treading tires for vehicles; rubber articles
being repairing materials of rubber for repairing tires,
namely, adhesive rubber patches for repairing inner tubes;
inner rubber tubes for pneumatic tires; tires, solid tires
for vehicle wheels; pneumatic, semi-pneumatic and solid
tires; vehicle wheels; wheel rims; inner tubes and mousse
for vehicle tires; casings for pneumatic tires.
The present invention relates to a high-performance tyre for vehicle wheels comprising a tread made with a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound comprising (i) a composition of elastomeric polymers consisting of at least one high Tg styrene-butadiene polymer (SBR) and optionally at least one low Tg isoprene (IR) polymer and (ii) a resin mixture consisting of at least one low Tr resin, at least one high Tr resin, and optionally at least one resin with intermediate Tr.
The present invention relates to a tyre (100) for bicycle wheels comprising: - a carcass structure (2) comprising at least one carcass ply (3) having ends (3a) turned up around respective bead cores (4a, 4b) to form respective opposite beads (5a, 5b), - a tread band (7) arranged in a radially outside position with respect to said carcass structure (2), and - a layer of vulcanised elastomeric material (8) superimposed, in a radially inside or outside position, to the carcass structure (2), or interposed in the carcass structure (2), said layer of vulcanised elastomeric material (8) axially extending from at least one bead (5a) to the opposite bead (5b), characterised in that said layer of vulcanised elastomeric material (8) is made by vulcanisation of a vulcanisable elastomeric compound comprising micrometre-sized fibrillated polymer fibres.
B60C 9/06 - Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship the cords extend diagonally from bead to bead and run in opposite directions in each successive carcass ply, i.e. bias angle ply
B60C 9/12 - Carcasses built-up with rubberised layers of discrete fibres or filaments
B60C 9/18 - Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
B60C 15/00 - Tyre beads, e.g. ply turn-up or overlap
B60C 15/06 - Flipper strips, fillers, or chafing strips
The present invention relates to a soundproof tyre for vehicle wheels comprising a noise reducing element made by vulcanising a vulcanisable and expandable elastomeric compound comprising at least one elastomeric polymer, at least one expanding agent, and at least one compound selected from the group of (i) fatty acid amides and (ii) polymers and copolymers of caprolactone, lactic acid, glycolic acid, and mixtures thereof.
B60C 19/00 - Tyre parts or constructions not otherwise provided for
B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
C08J 9/00 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof
C08J 9/10 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen
Calibration method (200), and related system (100), of a sensor (70) for tyres, comprising, with the sensor (70) mounted at a crown portion (31) of a tyre (99) and during an advancement of a vehicle onto which the tyre (99) is fitted: a) acquiring (1), from the sensor (70), a motion signal representative of a motion of the crown portion (31); b) acquiring (2) a respective current value of one or more operating conditions of the tyre (99); c) processing (3) the motion signal for obtaining from the motion signal a first value representative of a calibration physical quantity associated with the motion of the crown portion (31) at said respective current value of the one or more operating conditions; d) calculating (4) a second value representative of the calibration physical quantity at the respective current value of the one or more operating conditions, by a predetermined mathematical correlation between the calibration physical quantity and the one or more operating conditions; e) iterating steps a), b), c) and d) for obtaining a first set of first values representative of the calibration physical quantity varying the respective current value of the one or more operating conditions, and a corresponding second set of second values representative of the calibration physical quantity; f) calibrating (6) the sensor (70) by a comparison between the first and second set.
In building a tyre (2) for bicycles, the deposition of at least one of said components is preceded by a cutting-to-size processing of a respective semifinished product (20a, 20b, 20c, 20d), which is made to advance with a lower surface (SI) thereof in abutment against an advancing plane (P) defined by a conveyor belt (23) comprising a feed section (24) and a preparation section (25) that are consecutively aligned. The advancement of the semifinished product is stopped when a head end (A) thereof reaches a predetermined cutting distance (K) with respect to a cutting plane (Q). A cutting section (T) of the semifinished product is lifted respective to the advancing plane (P) at the cutting plane (Q), and the semifinished product is cut transverse along a cutting line (L) in order to separate a piece (21) of predetermined length. The piece (21) advances along the conveyor belt (23) in order to position and stop the head end (A) on the deposition surface (15) of a building drum (13) that rotates while the conveyor belt (23) moves the piece (21) at an advancing speed correlated to a peripheral speed of the deposition surface (15), in order to circumferentially deposit the piece (21).
An apparatus for vulcanising and moulding tyres comprises an annular container (16) engaging or configured to engage a plurality of circumferential sectors (10). The annular container (16) is movable between a raised position, in which the circumferential sectors (10) are circumferentially spaced from each other, and a lowered position, in which the annular container (16) surrounds the circumferential sectors (10) and the circumferential sectors (10) are circumferentially moved close to each other. A conduit (26) for circulating a heating medium is provided in the annular container (16). The conduit (26) surrounds the circumferential sectors (10) and has a wavy pattern that stretches towards the bottom (18) and towards the top (17) in a wavy pattern.
An apparatus for building green tyres (100) for bicycles comprises a building drum (2) rotating around a primary rotation axis (A) and at least one feed line (3) configured for dispensing at least one semifinished product (108) comprising an insert (106) towards a pointing section (2b) of said building drum (2). The feed line (3) comprises an applicator device (4) situated in radially outer position with respect to the building drum (2) in order to feed the semifinished product (108) along an advancement direction (B) and apply the insert (106) on a carcass structure (102) arranged on the building drum (2). The applicator device (4) comprises a guide body (5) and an applicator member (6), where an outlet section (5a) of the guide body (5) is situated, with reference to the advancement direction (B), in proximity to an application portion (6a) of the applicator member (6). The guide body (5) is configured for maintaining the semifinished product (108) in an alignment condition along the advancement direction (B) opposing slip forces transverse to the advancement direction (B) acting on the semifinished product (108) and the applicator member (6) is configured for receiving the semifinished product (108) correctly aligned from the guide body (5) and for pressing the insert (106) on the carcass structure (102) along a radially inner direction.
An apparatus for building green tyres (100) for bicycles comprises a building drum (2) rotating around a primary rotation axis (A) placed at a predetermined first height (Q1), a feeding group (4) for feeding at least one carcass ply (103) towards the building drum (2) located above a top portion (3) of the building drum (2) and a first feeding line (5) configured for feeding a first insert (106) towards a first pointing section (2f) of the building drum (2), in which the first pointing section (2f) is situated at height lower than or equal to said predetermined first height (Q1).
An apparatus for building green tyres (1) for bicycles comprises a building drum (20), at least one feeding line (103) configured for feeding a first semifinished product (A1, An), a cutting device (104) operative along the feeding line (103) and configured for cutting to size a piece (C) of the first semifinished product (A1- An). The feeding line (103) comprises a motorised application conveyor belt (105) configured for thrustingly feeding the piece (C) so as to move it towards the building drum (20) up to a respective first pointing zone (106). At least one dispensing line (112) is configured for dispensing a second semifinished product (B1-Bm) directly towards the building drum (20) up to a second pointing zone (113). A grip ring (118) is configured for axially removing a built green tyre (1) from the building drum (20).
A working station for deposition of elementary semifinished products for building tyres is, the working station includes an anthropomorphic robotized arm for moving an output end effector, a building drum, a feeding apparatus and a control apparatus. The control apparatus is configured to calculate, in a drive interval, a pulse with modulation (PWM) profile for a speed parameter and controlling the output end effector as a function of the PWM.
In building a tyre (2) for bicycles, the deposition of at least one of said components is preceded by a cutting-to-size processing of a semifinished product (20a, 20b, 20c, 20d), which is made to advance with a lower surface (SI) thereof in abutment against an advancing plane (P) defined by a conveyor belt (23) comprising a feed section (24) and a preparation section (25) that are consecutively aligned. The advancement of the semifinished product is stopped when a head end (A) thereof reaches a predetermined cutting distance (K) with respect to a cutting plane (Q). A cutting section (T) of the semifinished product is lifted respective to the advancing plane (P) at the cutting plane (Q), and a cutting member (39, 49) translates transverse to the semifinished product in order to cut the latter along a cutting line (L). A tail end (B) of the cut piece (21) and a head end (A) of the semifinished product are repositioned on the advancing plane (P) upstream of the cutting line (L).
In building a tyre (2) for bicycles, the deposition of at least one of said components is preceded by a cutting-to-size processing of a semifinished product (20a, 20b, 20c, 20d), which advances in abutment against an advancing plane (P) defined by a conveyor belt (23) comprising a feeding section (24) and a preparation section (25) that are consecutively aligned. The advancement of the semifinished product is stopped and an abutment plate (50) interposed between the feeding section (24) and the preparation section (25) is lifted with respect to the advancing plane (P) together with a cutting section (T) of the semifinished product. A cutting member (51) translates transverse to the semifinished product in order to cut the latter along a cutting line (L). The abutment plate (50), carrying a tail end (B) and a head end (A) of the cut semifinished product, is repositioned coplanar to the advancing plane (P).
Process for building tyres for wheels of vehicles, comprising the following building operations: a) providing a first forming drum (10) rotating about its central axis (X-X); b) winding around a radially external surface (11) of said first forming drum (10) a cut-to-size semi-finished element (20), thereby forming a corresponding component (30) of a tyre being processed, wherein said semi-finished element (20) has, after having been wound around said first forming drum (10), opposite ends (21, 22) juxtaposed with each other to form a junction zone (23); c) repeating operation b) until completion of the building operations on said first forming drum (10). During said building operations, a checking operation is performed on said tyre being processed, at least at the end of an operation b). Said checking operation comprises: acquiring at least one two-dimensional image (100) of said tyre being processed; identifying, in said image (100), at least one junction zone (110) in a radially external position of said tyre being processed; providing a plurality of reference images (200), wherein each reference image (200) represents, whether alone or combined with one or more other reference images, a junction zone type; comparing said at least one identified junction zone (110) with each one of the reference images (200); selecting, as a function of said comparison, a junction zone type corresponding to said at least one junction zone (110) identified in said image (100); classifying said at least one identified junction zone (110) on the basis of the selected junction zone type; generating, as a function of said classification, either a stop signal (S1I) or a consent signal (S2). Said stop signal (SI) causes said building operations to stop. Said consent signal (S2) activates the execution of subsequent operations on said tyre being processed.
A studded tyre comprises a tread band (2), on which there are defined a plurality of blocks (5) and a plurality of studs (9) which are arranged on at least some of said blocks. On each block (5) on which a stud (9) is provided there is defined a protuberance (10) which is spaced apart from said stud and which extends continuously around said stud (9) over an angular extent greater than or equal to 270°. The protuberance (10) is delimited at its opposite sides by an internal channel (20) and by an external channel (30), which are both continuous.
A winter car tyre (100) is described, in particular a winter car tyre able to deliver high driving torque and/or to reach high speeds, provided with a tread band comprising transverse sipes (13), wide and deep pairs of first transverse grooves (2, 3) which are widely extended and alternate with pairs of second transverse grooves (4, 5) which are of non-negligible extent but are smaller wide and deep and are counter-inclined relative to the first transverse grooves (2, 3).
Method (200), and system thereof (1), for checking a process for building a tyre comprising the sequential deposition of an ordered plurality of N semi-finished elements on a drum (2), the method comprising: - predetermining (102) an ordered plurality of N classes of drum states, wherein a first class corresponds to a bare drum state and an i-th class, with i ranging from 2 to N, corresponds to a drum state including the i-1 th semi-finished element deposited in radially outermost position; -before the deposition of an i-th semi-finished element: - acquiring (103) one image of a current drum state; - processing (104) the image to associate to the current drum state a current class among the ordered plurality of N classes of drum states; - authorising the deposition of the i-th semi-finished element on the basis of a comparison (105) between the current class and the expected class, i.e. the i-th class in the ordered plurality of N classes.
Method of restoring a monitoring functionality in a tyre (99) and tyre (99) suitable for such method for restoring, the method comprising producing the vulcanized tyre (99) comprising at least a first (A1 ) and a second clean portions (A2) of an inner surface (1 ) of the tyre (99), fixing a first monitoring device (3) on the first clean portion (A1 ) and leaving the second clean portion (A2) free of monitoring devices; and, following a loss of monitoring functionality by the first monitoring device (3) fixed onto the first clean portion (A1 ), fixing a second monitoring device (4) onto the second clean portion (A2).
The present invention relates to a self-sealing tyre for vehicle wheels comprising at least one carcass ply (3), a tread band (7) applied in a radially external position with respect to said carcass ply in a crown portion, at least one liner (9) applied in a radially internal position with respect to said carcass ply, a sealing assembly (10, 11) applied in a radially internal position with respect to said liner and axially extending at least at a part of the crown portion; wherein said sealing assembly comprises a permanent self-supporting elastomeric layer (11) having an elongation modulus at 10% lower than 0.8 MPa, said self-supporting elastomeric layer being obtained by vulcanisation of an elastomeric compound having a Mooney ML(1+4) viscosity lower than 30, and a layer of sealing material (10) associated with and supported by said permanent self-supporting elastomeric layer; wherein said self-supporting elastomeric layer is radially internal to the layer of sealing material and said layer of sealing material is placed substantially in contact with said liner.
