Abstract: A method for verifying the correct formation of the beads in a process and a plant for building tyres for vehicle wheels, includes: loading a plurality of annular anchoring structures in a storage, disposing them in two groups separated by an opening; positioning a building drum provided with a carcass sleeve in a tyre bead-forming machine; picking up two of the annular anchoring structures from the storage and loading them on the tyre bead-forming machine. In a work area of the tyre bead-forming machine, on each of two axially opposite zones of the carcass sleeve, a respective annular anchoring structure is fit and each of the abovementioned zones is turned up around the respective annular anchoring structure to form the beads. The aforesaid opening allows an operator to conduct a visual inspection of the work area and/or access the work area during the entire work cycle of the machine.

Abstract: An apparatus (10) for producing green tyres (13) consisting of a carcass or inner section (13?) coupled with a belt package or outer section (13?), comprising a first tyre processing assembly (12) for manufacturing the carcass or inner section (13?), a second tyre processing assembly (14) for finishing said carcass (13?), a third tyre processing assembly (16) for manufacturing a belt package or outer section (13?) and for coupling said carcass or inner section with said belt package or outer section (13?, 13?) to form a tyre (13), and an unloading station (60) for unloading said tyre (13), said tyre processing assemblies comprising interface means for transferring the product being manufactured from one tyre processing assembly to another one and for moving said product being processed internally to said individual tyre processing assemblies in a fully automatic manner.

Abstract: A method for managing a carcass structure building line, a plant and a process for building tyre carcass structures, wherein the plant includes a carcass structure building line provided with a plurality of stations including an unloading station and n building stations. A group of forming drums being processed includes m forming drums being processed defining a first size of carcass structure being processed. Three groups of entering forming drums include respective entering forming drums, defining a second size of carcass structure being processed. A pair of support elements being processed includes a first and a second support element being processed and three pairs of entering support elements respectively include a first and a second entering support element. The invention also relates to a method for managing a carcass structure building line.

Abstract: A carcass ply is applied around an outer surface of a building drum according to an application diameter larger than the fitting diameter of a tyre. Coaxially engaged around each of the end flaps is an annular anchoring structure defining the fitting diameter. A pair of sidewalls is manufactured by laying of a continuous elongated element in the form of approached coils on the carcass sleeve. An outer sleeve, including at least one belt structure possibly associated with a tread band, is coaxially centered around the carcass sleeve. Through axial approaching of two halves forming the building drum, the carcass sleeve is shaped into a toroidal configuration to determine application of same against a radially internal surface of the outer sleeve.

Abstract: A plant for building tyres includes a plurality of working locations, at least one first working location being associated with at least two loading/unloading locations, a proximal one and a distal one, each of said working locations and loading/unloading locations being associable with a forming drum. The production cycle is controlled by the method of: (i) loading a first forming drum into the at least one first working location; (ii) loading a second forming drum into the loading/unloading location; (iii) at the end of the working provided in the at least one first working location, unloading the first forming drum into the proximal loading/unloading location.

Abstract: A plant for building tyres includes a plurality of working locations, at least one first working location being associated with at least two loading/unloading locations, a proximal one and a distal one, each of said working locations and loading/unloading locations being associable with a forming drum. The production cycle is controlled by the method of: (i) loading a first forming drum into the at least one first working location; (ii) loading a second forming drum into the loading/unloading location; (iii) at the end of the working provided in the at least one first working location, unloading the first forming drum into the proximal loading/unloading location.

Abstract: Two auxiliary support members are operatively engaged with a building drum, in axially approached relationship with respective halves of the drum itself, each auxiliary member having a circumferential rest surface extending in the continuation of an outer circumferential surface of the building drum itself. Applied around the outer circumferential surface of the building drum is at least one carcass ply having axially opposite end flaps each lying on the circumferential rest surface of the respective auxiliary support member. A pair of auxiliary shaping members engaged with the building drum in place of the auxiliary support members, each act against a circumferential abutment edge carried by the building drum, to enable the carcass ply to be shaped into a toroidal configuration concurrently with mutual approaching of the halves of the building drum.

Abstract: In an apparatus for building tires for vehicle wheels, a forming drum is loaded on a shuttle movable on a guide along a deposition line. The shuttle is moved on the guide in the two running directions to bring it to dispensing stations of semifinished products disposed in at least some deposition locations positioned in space succession along the deposition line. At each of the dispensing stations, at least one semifinished product is laid on a radially external surface to the forming drum carried by the shuttle for forming at least one component of a tire. The shuttle is moved on the guide in a different sequence from the space succession of the deposition locations along the deposition line.

Abstract: A space required for forming a cylindrical carcass band is reduced and productivity of carcass band forming is improved. A first forming drum (21) forms a cylindrical carcass ply (3). A second forming drum (22) forms a cylindrical member (7) by forming a cylindrical inner liner (4) and combining the inner liner (4) with the carcass ply (3). A third forming drum (23) forms a cylindrical side member (5) a carcass band (8) by forming a cylindrical side member (5) and combining the side member (5) with the cylindrical member (7). A conveying device (30) conveys the carcass ply (3) from the first forming drum (21) to the second forming drum (22) and conveys the cylindrical member (7) from the second forming drum (22) to the third forming drum (23). The third forming drum (23) is arranged below an arrangement space for the first forming drum (21) and the second forming drum (22).

Abstract: A standardization system for the manufacture of tires is provided. The same size tire components can be used in the summit of tires having different sizes i.e., tires having different section widths, sidewall heights, and/or aspect ratios. A matrix of tire sizes can be associated with one or more tire summit parameters. The matrix can be used for the manufacture of tires having one or more standardized components by holding substantially constant the value of one or more tire summit parameters across a diagonal of the matrix.

Abstract: A vulcanization apparatus provided with a vulcanization vessel for vulcanizing a green tire and a suction line for sucking out gas from inside the vulcanization vessel after the vulcanization vessel has been opened. Accordingly, oily smoke generated when vulcanized rubber has been removed from a bladder and an inner wall of a mold can be more efficiently discharged than in cases in which gas inside a vulcanization vessel is sucked out and additional air is introduced into the vulcanization vessel only prior to opening the vulcanization vessel.

Abstract: A plant, a method and a process for building tires for vehicle wheels in a carcass structure building line includes: a) associating a pair of support rings with a forming drum in a work station for associating support rings; b) building at least one structural component of the tire being processed on the forming drum provided with the pair of support rings in at least one work station of the carcass structure building line; c) removing the pair of support rings from the forming drum in a work station for removing support rings; d) transferring the pair of support rings dissociated from the forming drum to a temporary storage for support rings; and e) building at least one further structural component of the tire being processed on the forming drum without the pair of support rings in a work station of the carcass structure building line.

Abstract: Method, process and plant for building tires for vehicle wheels wherein: in a service position of a carcass structure building line, a forming drum is associated with a pair of support elements including a first support element and a second support element; the forming drum is moved, associated with the pair of support elements, in a deposition line in the carcass structure building line; and the forming drum is transferred from the deposition line to a subsequent work station of the carcass structure building line.

Abstract: A plant for building tires for vehicle wheels, includes at least one forming drum having a supporting shaft axially projecting from opposite sides relative to a central body. A handling device is adapted to engage the forming drum and transfer it between at least one loading/unloading location and a work location provided for carrying out at least one process working on the forming drum. The handling device includes a grip assembly carrying at least two grip members each engaging the supporting shaft in the vicinity of each of the end portions thereof, and at least one motor associated with at least one of said grip members for driving the forming drum in rotation while the at least one process working is being carried out in the work location.

Abstract: A method and a plant for manufacturing tires for vehicle wheels wherein the method includes the steps of: a) building in a building station a substantially cylindrical carcass structure; b) manufacturing in a finishing station a substantially cylindrical sleeve including a tread band applied at a radially outer position with respect to a belt structure including at least one belt layer. Step b) includes the steps of assembling a first belt structure at a first working position on a first auxiliary drum of the finishing station; applying a tread band at a second working position at a radially outer position with respect to a second belt structure previously assembled on a second auxiliary drum of the finishing station, positioning the first auxiliary drum supporting the first belt structure at the second working position; and positioning the second auxiliary drum supporting the substantially cylindrical sleeve thus obtained at a picking position of the finishing station.

Abstract: A bead ring and a belt-tread component are prepared in advance, and a forming drum capable of axially moving carries a tire body component to enter a forming pressing workstation. The forming machine comprises a main machine and a servicer, wherein a belt drum laminating workstation at one side of a belt drum, a main servicer laminating workstation at one side of the forming drum, and a forming pressing workstation at one side of a combined roller are arranged along the center line of a main shaft of the main machine; the prepared belt-cap ply-tread component and sidewall-inner liner-carcass ply component are conveyed to the workstations and combined with the bead ring, so as to carry out turn-up forming and pressing operation technologies of a tire blank; the forming pressing workstation is arranged between the belt drum laminating workstation and the forming pressing workstation.

Abstract: Method, process and plant for building tires for vehicle wheels wherein: in a service position of a carcass structure building line, a forming drum is associated with a pair of support elements including a first support element and a second support element; the forming drum is moved, associated with the pair of support elements, in a deposition line in the carcass structure building line; and the forming drum is transferred from the deposition line to a subsequent work station of the carcass structure building line.

Abstract: A method of manufacturing tires includes making a plurality of structural components for tires, assembling the components following a pre-established sequence at respective work stations disposed along a manufacturing line, transferring the tires to a curing line, and curing the tires in respective vulcanization molds. The tires are sequentially transferred along the manufacturing line from a first work station to successive work stations. At least one series of tires is simultaneously processed on the manufacturing line and the curing line, and the at least one series of tires includes at least one first tire model and at least one second tire model different from the at least one first tire model. The tires are transferred from the manufacturing line to the curing line at a same rate as the tires are sequentially transferred along the manufacturing line from the first work station to the successive work stations.

Abstract: The triple-drum forming machine for the tire comprises a tire body drum, a belted layer drum and a forming drum, which are arranged on the same horizontal axis, wherein a portal frame for conveying a raw material is vertically arranged above the tire body drum, the belted layer drum and the forming drum; the transverse central line of the portal frame overlaps with the axial center lines of the tire body drum, the belted layer drum and the forming drum; the tops of the tire body transfer ring component and the belted layer transfer ring are respectively connected to the portal frame in a sliding manner; the portal frame comprises a horizontally arranged truss and a plurality of groups of vertically arranged upright posts; the horizontally arranged truss is connected with the vertically arranged upright posts.

Abstract: In building tyres, an intermediate portion of a carcass structure is built at a time on a respective forming drum within an intermediate forming line. The forming drum with the intermediate portion of the carcass structure is made available at a first transfer location. The intermediate portion of the carcass structure is completed through n completion locations with n?1 and then transferred for the subsequent assembling with a crown structure to a second transfer location. At an operating moment in which the first transfer location is occupied by a forming drum coming from the intermediate forming line or intended for the intermediate forming line, from one to n locations selected from the n completion locations and the second transfer location are occupied by respective forming drums.

Abstract: In the field of tire building, underbelt inserts are applied to an expandable support associated with an auxiliary drum on which the belt structure is made, simultaneously with manufacture of a carcass structure on a primary drum. Following expansion of the expandable support, the underbelt inserts are applied to the belt structure that can be directly made on the support itself in an expanded condition. The belt structure together with the underbelt inserts and a tread band are then transferred onto the carcass structure formed on the primary drum to complete building of the tire following shaping of the carcass into a toroidal conformation.

Abstract: On a building drum, anchoring structures to beads, carcass plies, a belt structure and/or other annular composite components are sequentially assembled with a liner, sidewalls, sidewall inserts, under-belt inserts or other annular elastomer components. Each of the sidewall inserts, sidewalls, or under-belt inserts is made as a one piece construction in a service station operating far away from the building drum for storage on a movable storing device. Actuating members operating on the movable storing device carry the annular elastomer components from the service station to the building drum. A transfer member picks up the annular elastomer components from the movable storing device to transfer them to the building drum.

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 tire building system includes a first loop of travel track, a plurality of first carriage housings movably mounted on the first loop, a second loop of travel track, a plurality of second carriage housings movably mounted on the second loop, and a first transfer station of the first loop and a second transfer station of the second loop for interrelating the first loop and the second loop.

Abstract: A device for manufacturing a reinforcing ply N by assembling lengths of strip cut at an angle, comprising: a feed means (300) for delivering a strip (B), an assembly belt (101), a transfer means (200) for conveying onto the assembly belt a given length of straight-grain strip in a direction (AA?) comprising a retaining wall (211), parallel to the planes of the assembly belt (101) and of the feed means, and a first face (211a) of which is intended to come into contact with the surface of the strip, in which device the feed means (300), the transfer means (200) and the assembly belt (101) are fitted with magnetic means.

Abstract: On a building drum, anchoring structures to beads, carcass plies, a belt structure and/or other annular composite components are sequentially assembled with a liner, sidewalls, sidewall inserts, under-belt inserts or other annular elastomer components. Each of the sidewall inserts, sidewalls, or under-belt inserts is made as a one piece construction in a service station operating far away from the building drum for storage on a movable storing device. Actuating members operating on the movable storing device carry the annular elastomer components from the service station to the building drum. A transfer member picks up the annular elastomer components from the movable storing device to transfer them to the building drum.

Abstract: A run-flat pneumatic tire assembly includes a pneumatic tire having an elastomeric casing and a tire cavity formed therein. A longitudinally-extending and approximately planar length of strip material is helically arranged within the tire cavity to pre-stress the length of strip material for usage of the pneumatic tire during under-inflated and non-inflated conditions. A method of making a run-flat pneumatic tire assembly is also included.

Abstract: A method of controlling the management of annular anchoring structures in a process and a plant for building tyres for vehicle wheels, includes: a) feeding pairs of first annular anchoring structures from a first storage region to a bead-forming machine; b) loading a plurality of second annular anchoring structures into a second storage region; c) carrying the second annular anchoring structures from the second storage region to the first storage region; and d) feeding pairs of second annular anchoring structures from the first storage region to the bead-forming machine. The method includes the sequential cyclic repetition of the above actions.

Abstract: Method and assembly for manufacturing a green tyre using a building drum (1) and a transfer device (3). The method comprises a step of arranging and forming a first tyre component assembly for the green tyre on a building drum (1), a step of placing the transfer device (3) around the building drum, a removal step of the first tyre component assembly for the green tyre being removed from the building drum (1) by the transfer device (3). After the removal step second tyre components for the same green tyre are arranged on the building drum (1), followed by a step of placing the transfer device (3) around the building drum (1), and a step of placing the first tyre component assembly on the second tyre components.

Abstract: A tire building method and a tire building facility according to the invention attains reduction of an installation space of the tire building facility and substantially equal building cycles for respective building stages to increase building efficiency and facilitate arrangement switching. For attaining these, a step for building a cylindrical carcass band, a subsequent step for building a cylindrical green case, a step for building a cylindrical belt and tread band, a step for combining the green case and the belt and tread band to build the final shape are divided as first through fourth building stages (S1) through (S4) having individual building drums (D1) through (D4) corresponding to the respective steps.

Abstract: The invention can perform building in a process for building a carcass band or a belt/tread band of a tire, in which two drum transfer support bases (10) supporting building drums (D1) are alternately shifted to first and second transfer sections (11), (12), in which predetermined building positions are set, and a rotational transfer device (A) for rotational transfer of the drum transfer support bases (10) is mounted between the first transfer section (11) and the second transfer section (12).

Abstract: A method and a plant for manufacturing tyres for vehicle wheels wherein the method includes the steps of: a) building in a building station a substantially cylindrical carcass structure; b) manufacturing in a finishing station a substantially cylindrical sleeve including a tread band applied at a radially outer position with respect to a belt structure including at least one belt layer. Step b) includes the steps of assembling a first belt structure at a first working position on a first auxiliary drum of the finishing station; applying a tread band at a second working position at a radially outer position with respect to a second belt structure previously assembled on a second auxiliary drum of the finishing station, positioning the first auxiliary drum supporting the first belt structure at the second working position; and positioning the second auxiliary drum supporting the substantially cylindrical sleeve thus obtained at a picking position of the finishing station.

Abstract: A tire manufacturing method includes a method for optimizing the uniformity of a tire by reducing the after cure radial force variation. The after cure radial force variation vector is modeled as a vector sum of each of the vectors representing contributions arising from the tire building steps—the “tire room effect vector” and a vector representing contributions arising from the vulcanization and uniformity measurement steps—the “curing room effect vector.” In further detail, both the tire room and curing room effect vectors can be further decomposed into sub-vectors representing each radial force variation contribution for which a measurable indicator is available. For a series of tires, the method obtains such measurements as the before cure radial runout (RRO) at one or more stages of the building sequence, measurements of loading angles on the tire building equipment, and measurements made during vulcanization process.

Abstract: A method and a plant for manufacturing tires for vehicle wheels wherein the method includes the steps of: a) building in a building station a substantially cylindrical carcass structure; b) manufacturing in a finishing station a substantially cylindrical sleeve including a tread band applied at a radially outer position with respect to a belt structure including at least one belt layer. Step b) includes the steps of assembling a first belt structure at a first working position on a first auxiliary drum of the finishing station; applying a tread band at a second working position at a radially outer position with respect to a second belt structure previously assembled on a second auxiliary drum of the finishing station, positioning the first auxiliary drum supporting the first belt structure at the second working position; and positioning the second auxiliary drum supporting the substantially cylindrical sleeve thus obtained at a picking position of the finishing station.

Abstract: Provided is a device for forming a special giant all-steel radial OTR tire in a continuous process, the device comprising a first base guide rail, a second base guide rail, a headstock, a main building drum, a belt housing, a belt drum and an overhead rail. The first base guide rail and the second base guide rail are parallel to each other. The overhead rail comprising a first traveling unit and a second traveling unit are disposed above the first base guide rail and the second base guide rail. A method for forming a special giant all-steel radial OTR tire in a continuous process is also provided.

Abstract: The invention can perform building in a process for building a carcass band or a belt/tread band of a tire, in which two drum transfer support bases (10) supporting building drums (D1) are alternately shifted to first and second transfer sections (11), (12), in which predetermined building positions are set, a rotational transfer device (A) for rotational transfer of the drum transfer support bases (10) is mounted between the first transfer section (11) and the second transfer section (12), which are arranged to get Out of position relative to and in parallel to each other, and two pairs of rotational transfer rails (27a), (28a) are juxtaposed on a rotating table (20), which has an axis (O) intermediate between the both transfer sections, to be positioned corresponding to extensions of travel rails (11a), (12a) arranged on the first and second transfer sections (11), (12) to receive two drum transfer support bases (10), (10), which enter from portions of the rails (11a), (12a) of the both transfer sections (1

Abstract: A rubber sheet joining apparatus includes a cutting unit for cutting a ribbon of rubber sheet reinforced with cords to generate rubber sheet strips having different lengths; a sheet overlapping unit for overlapping and joining the rubber sheet strips having different lengths to make an overlapped and joined strip. First holding members hold a front end portion of a following overlapped and joined strip. Second holding members hold a rear end portion of a preceding overlapped and joined strip. Support guides movably support the first holding members relative to the second holding members. An operating unit moves the first holding members relative to the second holding members to butt-join the side surfaces of two successive overlapped and joins strips held respectively by the first holding members and the second holding members to generate a ply sheet.

Abstract: A plant and a process for building green tyres for vehicle wheels.

Abstract: A plant for building tyres of at least two different models for vehicle wheels, includes at least a tyre building line, which in turn, includes: a plurality of work stations arranged according to a sequential series, each work station being adapted for building at least one structural component of each tyre and assembling at least one elementary component; at least one handling device for the tyres being processed on the respective forming supports associated to each work station; and at least one transfer device adapted for transferring the tyre being processed on its forming support from any first work station of the sequential series to any other second work station not adjacent thereto of the sequential series, so that the tyre being processed on its forming support only passes in the first and second work stations.

Abstract: On a building drum, anchoring structures to beads, carcass plies, a belt structure and/or other annular composite components are sequentially assembled with a liner, sidewalls, sidewall inserts, under-belt inserts or other annular elastomer components. Each of the sidewall inserts, sidewalls, or under-belt inserts is made as a one piece construction in a service station operating far away from the building drum for storage on a movable storing device. Actuating members operating on the movable storing device carry the annular elastomer components from the service station to the building drum. A transfer member picks up the annular elastomer components from the movable storing device to transfer them to the building drum.

Abstract: In a vulcanisation and moulding apparatus for tyres and a method of manufacturing the same, the apparatus includes containment walls defining an inner surface delimiting a moulding cavity. The shape of the inner surface matches the final conformation to be given to the vulcanised tyre and includes a plurality of lamellae. Each lamella comprises at least one lug inserted in a respective seat formed in the inner surface and opening on the inner surface itself. The lug and the respective seat, along an insertion direction of the lamella into the seat, are at least partly misaligned relative to the work portion. The work portion of the lamella further comprises at least one abutment surface bearing against the inner surface of the moulding cavity. The seat is closed with an addition material by laser or tungsten inert gas welding, so as to lock the lamella in the moulding apparatus.

Abstract: The method of building and transferring a tread belt structure on a portable and collapsible building drum 10 mounted coaxially on a building machine 100 with a rotatable shaft 120 is disclosed. The method includes the steps of forming the annular tread belt 4 on the building drum 10, transferring the building drum 10 with the tread belt 4 from the rotatable shaft 120 onto a pivoting transfer device 200, pivoting the transfer device 200 about 90° rendering the tread belt 4 and axis of the building drum 10 perpendicular to a horizontal plane, collapsing the building drum 10, separating the annular tread belt 4 from the building drum 10, removing the tread belt 4, expanding the tire building drum 10, pivoting the building drum 10 into coaxial alignment with the rotatable shaft 120, moving the building drum 10 onto the shaft 120. The tread belt 4 has one or more elastomeric components applied while hot and the equipment provides means for weighing the tread belt 4.

Abstract: A tire building core manipulating apparatus for a segmented tire building core is provided, the core including a plurality of core segments extending generally radially from a central axis. The manipulating apparatus includes a support frame; a core latching mechanism mounted to the support frame for operatively engaging a mating mechanism on the core whereby suspending the tire building core in a preferred axial orientation and raises and lowers the core to engage one or more stations in a tire curing line. A transport mechanism relocates the support frame with the tire building core in the preferred axial orientation between a plurality of stations in the tire curing line.

Abstract: A tire manufacturing method includes the steps of, when a green tire is molded, moving a toroidally expandable toroidal molding drum through a distance between a plurality of working stations at a specified tact time, disposing a carcass band and both bead cores on the drum in any working station and locking the bead cores, increasing the diameter of the molding drum, toroidally extending the carcass band between both bead cores, and rolling up the side portion of the carcass band around the bead cores in the outer radial direction, assembling tire component members with the bead cores locked to the toroidal molding drum and molding the green tire, and reducing the diameter of the molding drum, unlocking the bead cores, and removing the green tire from the molding drum, whereby the tires of a plurality of sizes can be sequentially molded, a conventional tire structure must not be largely changed, and an energy and time can be prevented from being wastefully consumed.

Abstract: A plant and a process for producing tyres for vehicle wheels, includes the steps of: a) building a carcass structure of a green tyre on a first forming drum in at least one carcass structure building line, the carcass structure including at least one carcass ply and a pair of annular anchoring structures; b) building a crown structure of a green tyre on at least one second forming drum in at least one crown structure building line, the crown structure including at least one belt structure and a tread band; c) toroidally shaping the carcass structure assembling it to the crown structure in at least one assembling and shaping work station for the tyre being processed, the assembling and shaping work station being synchronised with the carcass structure building line and with the crown structure building line; wherein each carcass structure is associated with the respective first forming drum whereon it is built up to the end of step c) of shaping and assembling the tyre being processed; and d) moulding and vulc

Abstract: A carcass ply is built on a forming drum by application of a plurality of strip-like elements by the steps of: setting a width of these strip-like elements, setting a width of the overlapped part between two adjacent strip-like elements, setting a fitting diameter of the forming drum by calculating a corresponding extension of a radially external laying surface, and calculating a whole number of strip-like elements to be applied. The whole number of strip-like elements is applied by rotating the forming drum around a geometric rotation axis thereof, and applying pairs of strip-like elements by means of a first laying unit and a second laying unit located close to opposite portions of the forming drum relative to the geometric rotation axis.

Abstract: A process for building tyres for vehicle wheels includes the steps of: i) building a carcass structure of a green tyre in at least one carcass structure building line, the carcass structure including at least one carcass ply and a pair of annular anchoring structures; ii) building a crown structure of a green tyre in at least one crown structure building line, the crown structure including a belt structure and a tread band; wherein step ii) of building the crown structure includes at least one step iii) of building the belt structure which in turn includes the steps of: a) building on at least one first building drum, an annular assembly including a first radially inner belt layer and at least a second belt layer radially external to the first belt layer; b) transferring the annular assembly on at least one auxiliary drum; c) turning up axially opposite end portions of the fast radially inner belt layer so as to obtain at least a partial overlapping of the end portions of the first belt layer on the at least

Abstract: A plant and a process for producing tyres wherein the process includes the steps of: a) building a green tyre on a toroidal support in a building line of a tyre production plant; b) transferring the green tyre and the relevant toroidal support from the building line of the production plant to a first holding unit; c) transferring the green tyre and the relevant toroidal support from the first holding unit to a vulcanization line of the production plant; d) moulding and vulcanization the green tyre in the vulcanization line of the production plant; e) separating the moulded and vulcanized tyre from the relevant toroidal support; f) transferring the toroidal support, separated from the relevant tyre, from the vulcanization line to the first holding unit; and g) transferring the toroidal support, separated from the relevant tyre, from the first holding unit to the building line of the production plant, wherein steps b) and g) are carried out through a first transfer device and steps c) and f) are carried out thr

Abstract: The present invention aims at improving balance and uniformity of a tire, with simplifying facilities, reducing space for the facilities and suppressing shape flows and generation of air bubbles. An extruder is provided for supplying rubber ribbon immediately after extrusion to a second molding drum, so that the rubber ribbon is spirally wound around the second molding drum plural times to structure a portion of tread (a cap layer), whereby the rubber ribbon which is relatively hot and soft is wound around the second molding drum. As a result, the rubber ribbon easily deforms compliant to the second molding drum. Further, no joint portion of starting and terminal ends as is observed in the prior art exists, whereby thickness of the tread is even in the circumferential direction.

Abstract: A plant for producing types of tyres different from each other includes a manufacturing unit including a plurality of work stations, devices for transfer and movement of the tyres being produced, and a vulcanizing unit including vulcanizing moulds for the tyres being produced. Each work station is designed to assemble at least one corresponding structural component on at least one type of tyre being produced. The devices for transfer and movement operate between the work stations and provide selective movement for each of the types of tyres being produced in proximity to corresponding work stations. The plant may also include a central processing unit. The central processing unit may control the devices for transfer and movement to coordinate processing stages for each type of tyre in the manufacturing unit and in the vulcanizing unit. Additionally, the plant may include holding stations associated with at least some of the work stations.