Pirelli Tyre S.p.a.

Politecnico Di Torino

Michele Ballabio

Maurizio Marchini

Stefano Boracco

Gianni Mancini

Gaetano Lo Presti

Vincenzo Orlando

Christian De Col

Bartolomeo Montrucchio

Guido Belforte

Alexandre Ivanov

Giuliana Mattiazzo

Simone Corbellini

Federico Colombo

Massimiliana Carello

A process and an apparatus for building tyres for vehicle wheels includes assembling at least one tyre component through laying of strip-like elements disposed circumferentially close to each other on a deposition surface radially external to the forming drum, wherein laying of each strip-like element includes: radially moving the strip-like element close to the deposition surface; locking a central portion of the strip-like element against the deposition surface; and pulling the strip-like element in opposite directions starting from the central portion toward the opposite ends thereof, while the central portion is maintained in a locked condition against the deposition surface, so as to progressively lay down the strip-like element against the deposition surface.

Process and apparatus for building tyres for vehicle wheels

In an assembly station, a carcass sleeve and an outer sleeve manufactured along respective building lines are mutually coupled. Integrated into the assembly station are engagement devices that can be alternatively-coupled to an auxiliary drum carrying an outer sleeve and to a building drum carrying a carcass sleeve. The building drum is engaged on the assembly station before removal of the auxiliary drum. A grip unit picks up the outer sleeve from the auxiliary drum associated with the engagement devices in order to position it around the carcass sleeve carried by the building drum.

Process and apparatus for assembling types

Production of carcass structures and/or production of crown structures includes: positioning a first continuous elongated element so that its end stretch is aligned with a cutting position; positioning a second continuous elongated element so that its end stretch is in side by side relationship with the end stretch of the first continuous elongated element; forming first strip-like elements from the first continuous elongated element; depositing the first strip-like elements on at least one forming drum; translating the end stretches of the first and second continuous elongated element in a transverse direction relative to their longitudinal extension to align the end stretch of the second continuous elongated element to said cutting position; forming second strip-like elements from the second continuous elongated element; and depositing the second strip-like elements on said at least one forming drum.

Process and plant for manufacturing mutually different tyres

Building the carcass structure of tyres for vehicle wheels includes associating, at each end edge of a carcass ply, at least one respective annular reinforcement structure formed by depositing along a circumferential direction a plurality of reinforcement elements having a first length. Such elements are cut to size from a reinforced continuous band-like element fed to a cutting group arranged at a first operative position adapted to allow a barycentric grip of the reinforcement elements. The cutting group can translate along a feeding direction of the band-like element to a second operative position for cutting to size a plurality of second reinforcement elements having a second length different from the first length. The second operative position is defined on the basis of the second length, so as to have a barycentric grip of the second reinforcement elements too.

Apparatus for manufacturing tyres for vehicle wheels

A process and an apparatus for building tires for vehicle wheels includes assembling at least one tire component through laying of strip-like elements disposed circumferentially close to each other on a deposition surface radially external to the forming drum, wherein laying of each strip-like element includes: radially moving the strip-like element close to the deposition surface; locking a central portion of the strip-like element against the deposition surface; and pulling the strip-like element in opposite directions starting from the central portion toward the opposite ends thereof, while the central portion is maintained in a locked condition against the deposition surface, so as to progressively lay down the strip-like element against the deposition surface.

A method and apparatus for controlling the deposition of elementary semifinished products in a process for building tires for vehicle wheels includes: driving in rotation, around a rotation axis, at a rotation speed between about &#x3c0;/8 rad/s and about 6&#x3c0; rad/s, a tire being processed which tire has a radially external surface including one or more elementary semifinished products; sending a first electromagnetic radiation to the radially external surface, the latter generating a corresponding first reflected radiation; detecting, through a first detecting device, at least one first image representative of the first reflected radiation; controlling the first detecting device in such a manner that a first exposure time for detecting the at least one first image is included between about 0.1 s and about 10 s; carrying out a first comparison between the at least one first image and one or more reference data; and generating a first notification signal as a function of the first comparison.

Method for controlling the deposition of elementary semifinished products in a process for building tyres for vehicle wheels

A method of controlling the deposition of semifinished elements for tire production, includes: sending a first radiation onto one tire being processed, consisting of one forming support with at least one portion of the tire component laid on the support, the tire component being at least partly formed of a plurality of semifinished elements defining a radially external layer of the tire being processed; receiving a first reflected radiation from a radially external surface of the tire being processed; determining, as a function of the reflected radiation, parameters representative of the thickness of the layer; comparing the parameters with reference values; and generating an alarm signal as a function of the comparison.

Method for controlling the deposition of semifinished elements for tyre production

Building the carcass structure of tires for vehicle wheels includes associating, at each end edge of a carcass ply, at least one respective annular reinforcement structure formed by depositing along a circumferential direction a plurality of reinforcement elements having a first length. Such elements are cut to size from a reinforced continuous band-like element fed to a cutting group arranged at a first operative position adapted to allow a barycentric grip of the reinforcement elements. The cutting group can translate along a feeding direction of the band-like element to a second operative position for cutting to size a plurality of second reinforcement elements having a second length different from the first length. The second operative position is defined on the basis of the second length, so as to have a barycentric grip of the second reinforcement elements too.

Process and apparatus for manufacturing tyres for vehicle wheels

Method and apparatus for controlling the movement of building members of a tyre in a process for manufacturing tyres for vehicle wheels includes: providing a first device of a first electromagnetic radiation on a first tyre building member; detecting, during a movement of the first building member, a first image in which the first electromagnetic radiation defines a trajectory followed, in the movement, by the first emitter device; carrying out a first comparison between the first image and one or more first reference data; and generating a first notification signal as a function of the first comparison.

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Milan, Italy

Michele Ballabio