Abstract: Tyre for vehicle wheels, comprising a tread band comprising circumferential grooves, circumferential ribs defined by said circumferential grooves and a plurality of sipes (10) that extend, on said circumferential ribs, from a radially outer surface of the tread band towards a radially inner portion of the tread band. Said sipes (10) extend along a predetermined trajectory and comprise, in any cross section perpendicular to said predetermined trajectory, a main portion (100) having a first radial dimension (H?) and a first transversal dimension (T, T?) substantially constant along a radial direction and, in a radially outer position with respect to said main portion (100), a top portion (110) extending up to said radially outer surface of the tread band and having, at said radially outer surface of the tread band, a second transversal dimension (W) greater than said first transversal dimension (T, T?).

Abstract: Abstract: A label (1; 50) for a tyre (100) of vehicle wheels comprises: at least a first layer (4) which is made of an elastomer material which is compatible with the elastomer material of a sidewall (102) of the tyre, an external surface (2) which is intended to remain visible when the label is coupled to the sidewall, a plurality of recesses (10) which are formed at the external surface (2) and which are capable of generally defining at least one portion of information which is set out on the label (1; 50). The elastomer material of which the first layer (4) is made comprises a quantity of a halogenated isobutylene polymer greater than 5 phr.

Abstract: A label (1; 50) for a tyre (100) of vehicle wheels comprises: an external surface (2) which is intended to remain visible when said label (1; 50) is coupled to a sidewall (102) of the tyre, an internal surface (3) which is opposite the external surface (2), a plurality of recesses (10) which are formed at the external surface (2) and which are not open at said internal surface (3) and which are capable of generally defining at least one portion of information which is set out on the label. The plurality of recesses (10) are formed on a first layer (4) of the label (1; 50) which is made of an elastomer material which is compatible with the elastomer material of the sidewall (102). The first layer (4) is partially vulcanized and has a degree of vulcanization corresponding to a value between T30 and T60.

Abstract: In the production of tyres for vehicle wheels in which at least one colored label (200) is provided on at least one of the sidewalls of the tyre, a green tyre is arranged inside a vulcanization mold comprising a first half-shell (50), a second half-shell opposite to the first half-shell (50) and a crown of circumferential sectors configured to air-tightly couple with the first half-shell (50) and with the second half-shell when the vulcanization mold is closed. Each label (200) comprises a layer of colored cross-linkable elastomeric material. Each label (200) is arranged in a predetermined position on a first support surface (50a) defined in at least one of the aforementioned first and second half-shell. The green tyre is arranged inside the vulcanization mold so that one of the sidewalls of the green tyre rests on such a support surface (50a).

Abstract: The present invention relates to an insert (10) for a mould (1) for vulcanising tyres for vehicle wheels, the insert being arranged to be received in a seat (5) formed on a moulding surface (4) of the mould (1) and comprising a base surface (12) from which a plurality of projections (20) extends. Each projection comprises a lateral surface (21) extending away from said base surface (12), which lateral surface defines a tapered profile of said projection (20) away from said base surface (12), is inclined at an angle of between 10° and 25° with respect to a direction (X) perpendicular to said base surface (12), and has a roughness of between 4 and 11 ?m. The invention is also related to a process for producing said insert and to a process for producing a tyre for vehicle wheels.

Abstract: A mould for vulcanising tyres for vehicle wheels, comprising—at least one sidewall plate (3) on which a moulding surface (4) is defined,—a removable insert (10) arranged to be received in a seat (5) which is made in said sidewall plate and open on said moulding surface, said insert comprising a main body (11; 111) on which a base surface (12) is defined which is intended for contacting a portion of a sidewall (52) of the green tyre, and—a retaining member (20) for retaining said insert (10) inside said seat. The retaining member comprises at least one locking element which is mounted on one out of said insert and said sidewall plate and can be moved in an operating direction (Y) between a locking position, in which said insert is retained inside said seat, and a release position, in which said insert is free to leave said seat.

Abstract: A method for controlling the discharge of fluids during a process for vulcanization and moulding of a green tire includes the steps of: building at least one portion of a radially internal surface of a green tire by winding of a continuous elongated element of elastomeric material into a plurality of coils confining circumferential grooves along the rolling direction of the tire; disposing the circumferential grooves into fluid communication with discharge channels present in the radially external surface of a pressing bladder disposed in a radially internal cavity bounded by the green tire.

Abstract: The present invention relates to a tyre (100) for vehicle wheels comprising at least one carcass structure (101), a tread band (109) applied in a position radially external to said carcass structure, and a pair of sidewalls (108) applied laterally on the opposite sides with respect to said carcass structure, where on at least one sidewall of said pair of sidewalls (108), a label (120) is applied comprising a protective layer (121), an adhesive layer (123), and possibly one or more ink layers (122) interposed between said protective layer (121) and said adhesive layer (123), where said adhesive layer (123) adheres the label (120) to the surface of said sidewall, where said protective layer (121) comprises polyester-based and/or polyether-based cross-linked aliphatic polyurethanes exhibiting dynamic elastic modulus values E?, measured at 25° C., static tensile deformation 1%, dynamic deformation +0.1%, and frequency 1 Hz, equal to or higher than about 5 MPa, and a residual deformation measured at 25° C.

Abstract: A tyre monitoring device comprises an electronic unit enclosed in an encapsulation material. The encapsulation material forms a single body with an upper portion and a lower portion. The upper portion encloses and protects the electronic unit and the lower portion has a base surface aimed at fixing said device to the inner surface of the tyre.

Abstract: Tyre for vehicle wheels, comprising a tread band comprising circumferential grooves, circumferential ribs defined by said circumferential grooves and a plurality of sipes (10) that extend, on said circumferential ribs, from a radially outer surface of the tread band towards a radially inner portion of the tread band. Said sipes (10) extend along a predetermined trajectory and comprise, in any cross section perpendicular to said predetermined trajectory, a main portion (100) having a first radial dimension (H?) and a first transversal dimension (T, T?) substantially constant along a radial direction and, in a radially outer position with respect to said main portion (100), a top portion (110) extending up to said radially outer surface of the tread band and having, at said radially outer surface of the tread band, a second transversal dimension (W) greater than said first transversal dimension (T, T?).

Abstract: An apparatus for manufacturing tires for vehicle wheels includes devices designed to form a green tire, a vulcanization mold having holding walls defining a molding cavity, and devices for transferring the green tire into the molding cavity. The vulcanization mold includes a plurality of vent valves, at least one of which includes a duct and a closure member having a closing head that is axially movable relative to the duct. The closing head is movable between a closed position, at which the closing head forms a contact seat, and an open position, at which the closing head and inner wall confine a passage for connection with the molding cavity.

Abstract: A high performance rain tire includes a tread band, having an inner portion and an outer portion as well as a central zone. There are formed in the tread band: two circumferential grooves in the inner portion, a central circumferential groove and a plurality of inner transverse grooves and a plurality of outer transverse grooves, wherein the inner transverse grooves include a central inner section which defines an angle with respect to the equatorial plane of between approximately ?95° and approximately ?135° and the outer transverse grooves include a central outer section which defines an angle, relative to the equatorial plane, of between approximately +125° and approximately +165°.

Abstract: A method for controlling the discharge of fluids during a process for vulcanization and moulding of a green tire includes the steps of: building at least one portion of a radially internal surface of a green tire by winding of a continuous elongated element of elastomeric material into a plurality of coils confining circumferential grooves along the rolling direction of the tire; disposing the circumferential grooves into fluid communication with discharge channels present in the radially external surface of a pressing bladder disposed in a radially internal cavity bounded by the green tire.

Abstract: A method for controlling the discharge of fluids during a process for vulcanization and molding of a green tire includes the steps of: building at least one portion of a radially internal surface of a green tire by winding of a continuous elongated element of elastomeric material into a plurality of coils confining circumferential grooves along the rolling direction of the tire; disposing the circumferential grooves into fluid communication with discharge channels present in the radially external surface of a pressing bladder disposed in a radially internal cavity bounded by the green tire.

Abstract: In a method of manufacturing tires for vehicle wheels, a green tire, once formed, is transferred into a vulcanization mold and pressed against the holding walls of a molding cavity. Concurrently with the pressing step, a fluid present between the green tire and the holding walls is evacuated through vent valves. The tire is brought into contact with the closing head of each valve so as to push it toward a closed position at which the closing head forms a contact seat spaced apart from the inner surface of the molding cavity in order to define an embedding recess between the inner surface of the molding cavity and the closing head.

Abstract: An apparatus for manufacturing tyres for vehicle wheels includes devices designed to form a green tyre, a vulcanisation mould having holding walls defining a moulding cavity, and devices for transferring the green tyre into the moulding cavity. The vulcanisation mould includes a plurality of vent valves, at least one of which includes a duct and a closure member having a closing head that is axially movable relative to the duct. The closing head is movable between a closed position, at which the closing head forms a contact seat, and an open position, at which the closing head and inner wall confine a passage for connection with the moulding cavity.

Abstract: A high performance rain tyre includes a tread band, having an inner portion and an outer portion as well as a central zone. There are formed in the tread band: two circumferential grooves in the inner portion, a central circumferential groove and a plurality of inner transverse grooves and a plurality of outer transverse grooves, wherein the inner transverse grooves include a central inner section which defines an angle with respect to the equatorial plane of between approximately ?95° and approximately ?135° and the outer transverse grooves include a central outer section which defines an angle, relative to the equatorial plane, of between approximately +125° and approximately +165°.

Abstract: In a method for manufacturing tires for vehicle wheels, a green tire, once formed, is transferred into a vulcanization mold and pressed against the holding walls of a molding cavity. Concurrently with the pressing step, a fluid present between the green tire and the holding walls is evacuated through vent valves. The tire is brought into contact with the closing head of each valve so as to push it toward a closed position of the valve itself. The closing head has a distal portion facing the molding cavity and includes at least one grip element for the tire blend, so that the closure member is pulled toward the open position while the molded and cured tire is moved away from the inner surface of the molding cavity.

Abstract: A method for controlling the discharge of fluids during a process for vulcanization and moulding of a green tire includes the steps of: building at least one portion of a radially internal surface of a green tire by winding of a continuous elongated element of elastomeric material into a plurality of coils confining circumferential grooves along the rolling direction of the tire; disposing the circumferential grooves into fluid communication with discharge channels present in the radially external surface of a pressing bladder disposed in a radially internal cavity bounded by the green tire.

Abstract: In a method for manufacturing tyres for vehicle wheels, a green tyre, once formed, is transferred into a vulcanisation mould and pressed against the holding walls of a moulding cavity. Concurrently with the pressing step, a fluid present between the green tyre and the holding walls is evacuated through vent valves. The tyre is brought into contact with the closing head of each valve so as to push it toward a closed position of the valve itself. The closing head has a distal portion facing the moulding cavity and includes at least one grip element for the tyre blend, so that the closure member is pulled toward the open position while the moulded and cured tyre is moved away from the inner surface of said moulding cavity.