A plant for producing tyres for vehicle wheels is described. The plant includes a building line configured to build a crown structure. The building line includes a building device configured to build a belt assembly. The building device includes a trolley, a first forming drum, a second forming drum, a first working area including a belt building device, a second working area downstream from the first working area including a depositing device, a first service area downstream from the second working area including a stationary annular holding member, and a second service area downstream from the first service area including a first support member.
A tyre includes a plurality of blocks which are defined on a tread band and at least one first sipe which is formed on each block. The first sipe extends in a first longitudinal direction and includes a first linear portion which substantially extends along the first longitudinal direction, a single-wave portion which extends in continuation of the first linear portion, and a second linear portion which extends in continuation of the single-wave portion. The single-wave portion includes a first segment which extends from the first linear portion as far as a first peak, a second segment which extends from the first peak as far as an opposite second peak and a third segment which extends from the second peak as far as the second linear portion. The angle of inclination of second segment is greater than that of the first segment and the third segment.
A tyre and related vulcanisable elastomeric compound and elastomeric composition are described. The tyre includes at least one structural element that includes a vulcanised elastomeric material including, before vulcanisation, a vulcanisable elastomeric compound including, before mixing, an elastomeric composition including per 100 phr of diene elastomeric polymer:
(a) 30 to 95 phr of at least one styrene-butadiene polymer (SBR);
(b) 5 to 70 phr of at least one diene elastomeric polymer selected from the group consisting of at least one isoprene polymer (IR), at least one butadiene polymer (BR), or mixtures thereof;
(c) 10 phr to about 120 phr, preferably 20 phr to 100 phr, of at least one white reinforcing filler;
(d) from about 1% to about 20% by weight, relative to the amount of said white reinforcing filler, of at least one silane coupling agent;
(e) 1% to 35% by weight, preferably 5% to 25% by weight, relative to the amount of said silane coupling agent, of a polyamine.
The present invention relates to a big enduro motorcycle tyre for mainly off-road use. By virtue of the particular “cap and base” arrangement of the tread band and to the specific mechanical properties of the compounds which constitute it, the tyre of the invention improves performance both off-road and in road driving, both on dry and wet surfaces.
A vehicle wheel tyre comprises a tread band, a tread surface, a plurality of blocks defined on the tread band, and at least one sipe formed on at least one of the blocks. The at least one sipe is open on a tread surface portion and at least on one first edge of the block, to define at least one first edge portion and at least one second edge portion adjacent to each other and at least partially bounded by the sipe. The first edge portion is defined by a chamfer extending between the tread surface portion and a wall of the block, and the second edge portion is defined by a corner resulting from the tread surface portion intersecting the wall.
A tyre (1) for motorcycle wheels is described comprising a tread band (8) of the “cap-and-base” type comprising a radially outer portion, formed by a central sub-portion (11a) made with a first vulcanized elastomeric material and by a pair of lateral sub-portions (11b, 11c) made with a second vulcanized elastomeric material, and a radially inner portion (12) made with a third vulcanized elastomeric material. The first vulcanized elastomeric material of the central sub-portion (11a) has a dynamic elastic modulus (E′) measured at a frequency of 10 Hz and at 23° C. greater than the dynamic elastic modulus (E′) measured in the same conditions of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) and both such vulcanized elastomeric materials have a respective dynamic elastic modulus (E′), again measured at a frequency of 10 Hz and at 23° C., comprised between 5.2 and 6.5 MPa and greater than the dynamic elastic modulus (E′) of the third vulcanized elastomeric material, measured in the same conditions. In the tyre (1), the ratios R1 and R2 between the dynamic elastic modulus and the tandelta of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) of the radially outer portion and the dynamic elastic modulus and the tandelta of the third vulcanized elastomeric material of the radially inner portion (12) of the tread band (8), respectively measured at a frequency of 10 Hz and at 100° C. and at a frequency of 10 Hz and at 70° C., are comprised between 0.8 and 1.2.
A tyre (1) for motorcycle wheels is described comprising a carcass structure (2), a belt structure (6) applied at a radially outer position with respect to the carcass structure (2), and a tread band (8) applied at a radially outer position with respect to the belt structure (6), wherein the carcass structure (2) comprises a carcass layer (2a) which comprises a plurality of reinforcing cords comprising one or more textile yarns comprising a plurality of textile filaments made of a material selected from rayon, PET, PEN, and PEEK, and/or hybrid reinforcing cords comprising a plurality of textile filaments made of a combination of two or more of rayon, PET, PEN, and PEEK, embedded in a vulcanized elastomeric material having a dynamic elastic modulus E′ measured at 70° C. and 100 Hz comprised between 5.0 and 9.0 MPa and a tandelta measured at 70° C. and 100 Hz comprised between 0.130 and 0.170. The vulcanized elastomeric material also comprises a white silica-based reinforcing filler and a residual unreacted amount of a silane coupling agent of the white silica-based reinforcing filler, expressed as an amount of silicon measured by ICP-OES, greater than or equal to 70 ppm.
The present invention relates to a tyre for vehicle wheels comprising at least one structural component comprising a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound made by mixing an elastomeric composition comprising (i) at least one diene elastomeric polymer, and (ii) a reinforcing filler comprising (a) needle-shaped morphology silicate fibres having nanometric size, (b) carbon nanotubes, and (c) optionally, carbon black and/or conventional silica.
The present invention relates to an elastomeric compound for tyres for vehicle wheels, in particular an elastomeric compound for tread band of a tyre, preferably for big enduro motorcycles. By virtue of the use of special diene elastomeric polymers in admixture, preferably associated with liquid polymers, the elastomeric compound incorporated in the tread band gives the tyre long mileage together with high handling, especially in wet conditions.
The present invention relates to a tyre for vehicle wheels comprising at least one structural component comprising a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound made by mixing an elastomeric composition comprising (i) at least one diene elastomeric polymer, and (ii) a reinforcing filler comprising (a) needle-shaped morphology silicate fibres having nanometric size, and (b) finely dispersed carbon black having a surface area NSA greater than 100 m2/g and a surface area OAN greater than 100 ml/100 g, and (c) optionally, conventional silica.
An apparatus for applying rubberized electronic tags to a tyre being processed. The apparatus has a peeling device defining a sliding path for a continuous band and driving members configured for imposing, on the continuous band, a longitudinal sliding motion along the sliding path with a sliding speed. The continuous band slides along a first abutment body, a recirculation transmission and a second abutment body. The continuous band coming from the first abutment body is first deflected by rotating the direction of the sliding speed of the continuous band and subsequently directed towards the second abutment body.
The present invention relates to compositions for elastomeric compounds for tyres, comprising modified diene polymers (A1) terminated with at least one tetrazole group (E) comprising at least one 2,5 disubstituted tetrazole which may be activated by heating, tyre components and tyres for vehicle wheels comprising them. Advantageously, the present modified diene polymers (A1) impart to the compounds lower hot hysteresis and reduced Payne effect and, consequently, lower rolling resistance and wear. Furthermore, the present polymers do not exhibit the processability problems shown by conventional functionalised diene polymers, with high affinity for white fillers.
The invention relates to a process for manufacturing a metallic reinforcing cord (10) for tyres for vehicle wheels. The process comprises providing at least one elongated element (15) comprising at least one metallic wire (11) twisted together with at least one textile yarn (20) and removing said at least one textile yarn (20) from said at least one elongated element (15) to form the aforementioned metallic reinforcing cord (10). Such a metallic reinforcing cord (10) has a helical geometry, consisting only of said at least one metallic wire (11) that extends along a helical path.
The invention relates to a process for manufacturing a metallic reinforcing cord (10) for tyres for vehicle wheels. The process comprises providing at least one elongated element (15) comprising at least one metallic wire (11) twisted together with at least one textile yarn (20) and removing said at least one textile yarn (20) from said at least one elongated element (15) to form the aforementioned metallic reinforcing cord (10). Such a metallic reinforcing cord (10) has a helical geometry, consisting only of said at least one metallic wire (11) that extends along a helical path.
The invention also relates to an apparatus (1) for manufacturing the aforementioned metallic reinforcing cord (10).
The present invention relates to compositions for elastomeric compounds for tyres, comprising polytetrazole cross-linking compounds characterized by precise activation temperatures, tyre components and tyres for vehicle wheels which comprise them. Advantageously, the present polytetrazole cross-linking agents give lower hysteresis and retention of the modulus of the compounds even under stress.
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.
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 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
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
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
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
40.
Process and apparatus for labelling a green tyre for bicycles
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
49.
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.
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
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.
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.
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 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.
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.
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.
A car tyre (100), in particular a high or ultra high performance car tyre also suitable for use on track, is described; the tread band (1) of the tyre has a central region (L1), separated from two shoulder regions (L2, L3), respectively an outer shoulder region (L2) and inner shoulder region (L3); the outer shoulder region (L2) has a width greater than the width of the inner shoulder region (L3); the outer and inner shoulder regions are provided with relatively large grooves (5,6); in the outer shoulder region these grooves (5) alternate with narrower grooves (7), which reduce the stiffness of this tyre region only to a limited extend; the central region (L1) of the tyre, instead, was designed so as to have a low void-to-rubber ratio of equal to or smaller than 0.09.
A tyre for vehicle wheels comprises at least one structural component including a plurality of textile reinforcing cords (10′), at least some of which comprise at least two yarns (20a, 20b) twisted together. At least one of said yarns (20a, 20b) is a texturized yarn (210) comprising a plurality of first filaments (201a) made of a recycled plastic material mixed with a plurality of second filaments (202a) made of a non-recycled plastic material.
The present invention relates to elastomeric compositions and compounds for tyres, in particular for tyre treads, comprising elastomeric polymers in specific ratios and having particular Tg values, tyre components and tyres for vehicle wheels which comprise them. These compounds find particular application in all-season tyres as they give them good manoeuvrability on snow, grip in the wet and advantageously limited wear of the tread.
In a shaping station (13), a toroidal forming drum (23) is positioned within a carcass sleeve (12) comprising at least one carcass ply (3) associated with a pair of beads (6) in radially inner position. The carcass sleeve (12) is toroidally shaped by radial expansion of the forming drum (23). The forming drum (23) carrying the shaped carcass sleeve (12) is removed from the shaping station (13). Tyre components (7, 8, 9) are applied externally on the shaped carcass sleeve (12), carried by the forming drum (23). At the end of the shaping and during the application of the tyre components (7, 8, 9), axially inner sides of said beads (6) are arranged axially against respective circumferential axially outer portions (S1) of an abutment surface (S) carried by the expanded forming drum (23), having shape corresponding to an inner shape of the shaped carcass sleeve (12).
A method for arranging elongated elements to be used in a process for building tyres for vehicle wheels, including: winding in parallel a first elongated element and a second elongated element of a first type respectively on a first winding support and a second winding support coupled and rotatable about a first rotation axis; winding in parallel a third elongated element and a fourth elongated element of a second type respectively on a third winding support and a fourth winding support coupled and rotatable about a second rotation axis, where the elongated elements of the second type are different from the elongated elements of the first type; decoupling the second winding support from the first winding support and the fourth winding support from the third winding support; and coupling the second winding support with the third winding support and the fourth winding support with the first winding support.
The present invention relates to compositions for elastomeric compounds for tyres, in particular for tyre treads, comprising particular reversible cross-linking agents, tyre components and tyres for vehicle wheels which comprise them. The present elastomeric compounds, due to their particular hysteretic behaviour, allow manufacturing tyres characterised by a lower rolling resistance during moderate driving and at the same time greater resistance to tearing and road grip during sports driving.
Method (200), and related system (100), for monitoring a status of a tyre (99) fitted on a vehicle, the method comprising: -with the vehicle in motion and the tyre (99) in rotation, acquiring (3, 6) a motion signal representative of a motion of a crown portion (31) of the tyre (99), wherein the motion signal temporally corresponds to a plurality of turns of the tyre (99); -filtering (15, 42) from the motion signal a part of the motion signal temporally corresponding at least to each passage of the crown portion (31) in a footprint area of the tyre (99), for obtaining a filtered motion signal; -obtaining (4, 7) a frequency spectrum of the filtered motion signal; -determining (11) the status of the tyre (99) based on the frequency spectrum.
The present invention relates to a self-supporting tyre (100) for motor vehicles which comprises sidewall reinforcing inserts (113A, 113B) with different stiffness. In particular, the sidewall reinforcing insert on the side of the tyre most stressed during driving is less rigid than the sidewall reinforcing insert on the less stressed side. The tyre of the invention exhibits a reduced rolling resistance and better comfort in normal driving and an unexpected increase in mileage in run-flat driving.
A method for arranging elongated elements in a process for building tyres for vehicle wheels, including: arranging a first winding support with a first elongated element of a first type wound on the first winding support; arranging a second winding support with a second elongated element of a second type different from the elongated element of the first type wound on the second winding support; arranging a coupling device including a first coupling body and a second coupling body rotatable with respect to one another about a rotation axis; and arranging the first winding support on the first coupling body and the second winding support on the second coupling body.
A tyre (100) for vehicle wheels is described comprising at least one structural element comprising a vulcanized elastomeric material obtained by vulcanizing a vulcanizable elastomeric composition comprising a predispersion of an elastomeric diene polymer and lignin obtained by a process comprising: a) providing in a dispersant liquid a first lignin suspension having a value of a median particle diameter D50 equal to or less than 10 microns; b) providing a second suspension comprising lignin and elastomeric diene polymer latex by mixing the first lignin suspension obtained from step a) with the latex; and c) removing the dispersant liquid from the second suspension comprising lignin and elastomeric diene polymer latex.
A method for arranging elongated elements in a process for building tyres for vehicle wheels, including: simultaneously winding a first elongated element and a second elongated element respectively on a first winding support in a first axial position and on a second winding support in a first axial position; simultaneously winding a third elongated element and a fourth elongated element respectively on the first winding support in a second axial position different from the first axial position and on the second winding support in a second axial position different from the first axial position, in which the elongated elements of the second type are the same as each other and different from the elongated elements of the first type.
The invention relates to a metallic reinforcing cord (10) for tyres for vehicle wheels, comprising a single metallic wire (11) extending along a substantially helical path to form a helix having a predetermined pitch (Pw) and, in at least some cross sections thereof, an inner diameter (Di) greater than, or equal to, 0.7 mm.
An “all season” tyre (1) for cars and/or light transport vehicles is described, having a tread band (8) provided with a plurality of longitudinal channels and a plurality of grooves (6, 7, 11, 12, 13) and sipes (21, 22, 23, 24, 25) having a substantially transverse course, regularly arranged in the central ribs formed by the longitudinal channels and in the shoulder regions (L2, L3) over the whole tread band (8). The tread band (8) also has transverse notches resulting from joining a groove and a sipe having a transverse course, arranged consecutively to each other, and seamlessly extending substantially over the whole portion of the tyre containing them, i.e., the shoulder regions (L2, L3) or some of the central ribs (9, 10).
After a support structure (12) has been circumferentially positioned around an annular component (11) of a tyre (2), gripping elements (16) carried by the support structure (12) and circumferentially distributed around a central axis (X) are radially approached to the annular component (11) bringing into contact therewith a plurality of feeler pins (22), slidably carried by each of said gripping elements (16). Once contact is made, the radially approaching of the gripping elements (16) to the annular component (11) continues by sliding the gripping elements themselves along the feeler pins (22). All the feeler pins (22) can therefore come into contact with the annular component (11), copying the shape of the outer surface. The feeler pins (22) are then locked with respect to the gripping elements (16) in order to allow the removal of a support drum (10) from the annular component (11) and support the latter in the absence of normal stresses.
Method (200), and related system (100), for monitoring a status of a tyre (99) fitted on a vehicle, the method (200) comprising: —in a first operative phase with the tyre (99) in a reference status: —during an advancement of the vehicle, acquiring (3) at least one first signal representative of a motion of a crown portion (31) of the tyre (99); —obtaining (4) a first frequency spectrum of the at least one first signal, the first frequency spectrum comprising a first plurality of peaks; —identifying (5) a first determined peak in the first plurality of peaks and determining a first frequency of the first determined peak; —in a second operative phase subsequent to the first operative phase: —during an advancement of said vehicle, acquiring (6) a second signal representative of the motion of the crown portion (31); —obtaining (7) a second frequency spectrum of the second signal, the second frequency spectrum comprising a second plurality of peaks; —identifying (8) a second determined peak in the second plurality of peaks corresponding to the first determined peak in the first plurality of peaks, and determining (9) a second frequency of the second determined peak; —determining (10) a reference frequency as a function of the first frequency of the first determined peak; —determining (11) a current frequency as a function of the second frequency of the second determined peak; —monitoring (12) the status of the tyre (99) based on a comparison between the current frequency and the reference frequency, or between two values of a same physical quantity, the two values being correlated to the current frequency and to the reference frequency respectively, wherein the physical quantity is a mass or a moment of inertia or a stiffness of the tyre (99).
Method (200), and related system (100), for monitoring a status of a tyre (99) fitted on a vehicle, the method (200) comprising: —with said vehicle in motion and said tyre in rotation, acquiring (3) a motion signal representative of a motion of a crown portion (31) of the tyre (99), the motion signal temporally corresponding to a plurality of turns of the tyre (99); —obtaining (4) a frequency spectrum of the motion signal; —determining (11) the status of the tyre (99) based the frequency spectrum, wherein the motion signal is representative of an axial component of the motion of the crown portion (31).
Tyre (10) comprising a monitoring device (1) which comprises a housing portion (2) and a base portion (3), the base portion (3) having a coupling surface (4) in single piece intended for fixing the monitoring device to the tyre, wherein the monitoring device (1) comprises an electronic unit (8) housed in the housing portion (2), wherein the monitoring device (1) is fixed to an inner surface (15) of the tyre (10) at a crown portion (16) of the tyre by an adhesive (6) interposed between the coupling surface (4) and the inner surface (15), wherein a first region (12) of the coupling surface (4) is covered by the adhesive (6) and a second region (13) of the coupling surface (4), complementary to the first region (12), is free of adhesive (6), and wherein the second region (13) is contained within a projection (5) of the housing portion (2) onto the coupling surface (4).
A method for extruding a semi-finished product made of elastomeric material. An elastomeric material is fed to an inlet channel of a gear pump with an inlet pressure value and dispensed through an exit channel of the gear pump with an exit pressure value greater than the inlet pressure value. The method detects the exit pressure value and adjusts the operation of the gear pump to maintain a predetermined pressure difference between the exit pressure and the inlet pressure based on the detection of the exit pressure value.
B29C 48/14 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
The invention relates to a metallic reinforcing cord (10) for tyres for vehicle wheels, comprising from two to ten metallic wires (11) twisted together with a twisting pitch (P) and each having a predetermined diameter. In at least some cross sections of the metallic reinforcing cord (10), at least two of said metallic wires (11) are arranged to a minimum mutual distance greater than, or equal to, 2.5 times the predetermined diameter.
A method for applying rubberized electronic tags to a tyre being processed. A continuous band is extended lengthwise along a longitudinal direction. The rubberized electronic tags are adhered to the front surface of the band and arranged sequentially along that direction. A rubberized electronic tag is peeled from the continuous band and applied to the tyre. The peeling includes imposing a longitudinal sliding motion and a sliding path on the band.
A car tyre (1), in particular a high or ultra high performance car tyre also suitable for use on track, is described. The tread band (8) of the tyre has a central region (L1) having a limited extension, separated from two large shoulder regions, respectively an outer shoulder region (L2) and inner shoulder region (L3). At least the outer shoulder region (L2) and the central region (L1) have a set, limited in type, number, size and extension, of transverse grooves. In the tread band (8) there are also annular portions (S1, S2, M) substantially lacking grooves such that the void-to-rubber ratio being zero.
An application device for applying a conductive insert on a tyre being processed. The application device includes a supply device for supplying a conductive liquid elastomeric compound, and an applicator having a movable surface for being operatively coupled with the supply device and receiving the conductive liquid elastomeric compound. The movable surface is for being placed in contact with a rotating tyre being processed and for applying the conductive liquid elastomeric compound on at least one coil of axially adjacent and/or partially superimposed coils. The applicator generates depressions in the tyre in a pattern defined by elements in relief and fills the depressions in the tyre with the conductive liquid elastomeric compound to covering the elements as the depressions in the tyre are generated.
A tyre for vehicle wheels includes a carcass structure with at least one carcass ply formed by strip-like elements consecutively adjacent one after the other along a circumferential extension and having overlap zones along respective longitudinal edges superimposed on each other. Each overlap zone has, along a longitudinal extension thereof, terminal sections that are laterally opposite with respect to an intermediate section. The intermediate section of each overlap zone has an intermediate overlap width greater than a terminal overlap width of the terminal sections.
B60C 9/08 - Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship the cords extend transversely from bead to bead, i.e. radial ply
B29D 30/20 - Building tyres by the flat-tyre method, i.e. building on cylindrical drums
The present invention relates to compositions for elastomeric compounds for tyres, comprising monotetrazole compatibilizing agents characterised by precise activation temperatures, tyre components and tyres for vehicle wheels which comprise them. Advantageously, the present monotetrazole compatibilizing agents allow the breaking properties of the compounds to be improved while maintaining a high compatibilisation of the filler.
patents
