Pirelli Tyre S.p.a.

Marco Cantu′

Stefano Mervic

Pierangelo Misani

Christian De Col

Walter Mandelli

Vincenzo Boffa

Cesare Emanuele Amurri

Fiorenzo Mariani

Fabio Regoli

Enrico Sabbatani

Luca Tersi

Emanuele Luca Schiavon

Lorenzo Avanzini

Mariani Fiorenzo

Matteo Calderoni

Roger Basilico

After a support structure () has been circumferentially positioned around an annular component () of a tyre (), gripping elements () carried by the support structure () and circumferentially distributed around a central axis (X) are radially approached to the annular component () bringing into contact therewith a plurality of feeler pins (), slidably carried by each of said gripping elements (). Once contact is made, the radially approaching of the gripping elements () to the annular component () continues by sliding the gripping elements themselves along the feeler pins (). All the feeler pins () can therefore come into contact with the annular component (), copying the shape of the outer surface. The feeler pins () are then locked with respect to the gripping elements () in order to allow the removal of a support drum () from the annular component () and support the latter in the absence of normal stresses.

Gripping method and apparatus for annular components of tyres for vehicle wheels

In a process for building tyres for vehicle wheels, at least one tread band () or other elastomeric component of a tyre () is made by applying at least one continuous elongated element () according to a plurality of turns (C) around a forming drum () rotating around a geometric rotation axis (X) thereof. The continuous elongated element () is made by the action of extruding a first material through an extrusion nozzle (), to form an inner core () of said continuous elongated element () exiting from an outlet opening () of the extrusion nozzle (). During the extrusion, a second material different from the first material is conveyed around the first material, at the extrusion nozzle () and upstream of the outlet opening (), to form a coating layer () which entirely surrounds the inner core ().

Process for building tyres for vehicle wheels

Method and plant for producing tyres for vehicle wheels in which: each vulcanizer () of a plurality of vulcanizers () is associated with a respective pick-up logic of green tyres from at least one storage area () of green tyres; upon each request to vulcanize a green tyre in a vulcanizer () of the plurality of vulcanizers (), the pick-up logic associated with said vulcanizer () is applied to select and pick up a green tyre from the storage area (); the respective pick-up logic associated with each vulcanizer () comprises a first pick-up rule of green tyres from the storage area () and, for at least one of the plurality of vulcanizers (), the first pick-up rule is changed into at least one second pick-up rule at least once during the production in the plant () of at least one lot of tyres.

Method and plant for producing tyres for vehicle wheels

A method for building green tyres includes: feeding an elementary semifinished product with a feeding apparatus; associating an anthropomorphic robotized arm with a forming drum; sending movement commands to the arm to move the forming drum in a working zone, the forming drum being moved while the feeding apparatus is feeding an elementary semifinished product, so that it is laid on the forming drum. Movement commands are sent to the arm, including: determining target coordinates for the arm in order to move the forming drum in the working zone; modifying the target coordinates by a correction function associated with the arm and the working zone, and using the modified coordinates for such movement commands.

Method for building green tyres

A method and plant for producing tyres for vehicle wheels in which: each vulcanizer of a plurality of vulcanizers is associated with a respective pick-up logic of green tyres from at least one storage area of green tyres; upon each request to vulcanize a green tyre in a vulcanizer of the plurality of vulcanizers, the pick-up logic associated with the vulcanizer is applied to select and pick up a green tyre from the storage area; and the respective pick-up logic associated with each vulcanizer includes a first pick-up rule of green tyres from the storage area and, for at least one of the plurality of vulcanizers, the first pick-up rule is changed into at least one second pick-up rule at least once during the production in the plant of at least one lot of tyres.

A method for checking tyres. A shift is determined along an acquisition direction between an acquisition point on a surface of a tyre to be checked and a position occupied by the acquisition point following a rotation of the tyre about its rotation axis. A linear laser beam is projected on a linear portion of surface of the tyre, and propagates in a direction parallel to the acquisition direction. A matrix image of a matrix portion of surface of the tyre containing the linear portion of surface is acquired; the image containing a laser line reflected by the linear portion of surface. A sub-portion of the matrix image is determined as a function of the determined shift, containing the reflected laser line. The sub-portion of the matrix image is then processed to determine an elevation profile of the linear portion of surface.

Method for checking tires

A method for controlling a manufacturing process of components of a tire for vehicle wheels, wherein at least one elongated element fed by a dispensing member is distributed onto a forming support by means of at least one pressing member acting on the at least one elongated element along a pressing direction. The method includes the steps of substantially continuously detecting the value of a characteristic quantity indicative of the displacement of the at least one pressing member along the pressing direction, comparing the detected value of the characteristic quantity with a threshold value and generating a warning signal when the detected value of the characteristic quantity exceeds the threshold value. Such a control method allows the presence of possible deposition anomalies to be identified right from the deposition step of the elongated elements on the forming support so as to ensure ever higher quality levels in tires manufactured through continuous processes.

Method and apparatus for controlling a manufacturing process of components of a tyre for vehicle wheels

A belt structure for a two-wheeled vehicle made by means of strip-like segments or elements, each including parallel cords embedded in an elastomeric layer, sequentially laid along the circumferential extension of a toroidal support so as to form a reinforcing layer having a continuous circumferential extension around a geometric rotation axis of the toroidal support, wherein each strip-like element is laid in a laying trajectory defining, at each point, a laying angle; at each point of the laying trajectory a laying gap is formed between adjacent strip-like elements; the laying trajectory is formed starting from preselected laying angles on the shoulder and on the crown of the tire; the laying gap between adjacent strip-like elements varies along at least one length of said laying trajectory between crown and shoulder so as to cause variation of the laying angle and obtain the preselected angles on the shoulder and on the crown.

Tyre for two-wheeled vehicle and process for manufacturing the same

In the manufacture of a tire, a belt structure is made by means of strip-like segments or elements, each comprising parallel cords embedded in an elastomeric layer, sequentially laid along the circumferential extension of a toroidal support, in such a manner that: each strip-like element is laid in a laying trajectory defining, at each point, a laying angle; at each point of the laying trajectory a laying gap is formed between adjacent strip-like elements, the laying trajectory being formed starting from preselected laying angles on the shoulder and on the crown of the tire, the laying gap between adjacent strip-like elements varying along at least one section of the laying trajectory between crown and shoulder so as to cause variation of the laying angle and to obtain the preselected angles on the shoulder and on the crown.

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Milan, Italy

Marco Cantu′