Abstract

A method and system for automatically feeding a strip (4) of elastomeric material to a user unit (8) by means of a feeding line (12) comprising an inlet conveyor (13) adapted to receive the strip (4) from a calender (10), an outlet conveyor (14) adapted to feed the strip (4) to an applicator device (11) of the strip (4) onto the user unit (8), and a shuttle (16) to transfer a head portion of the strip (4) from the inlet conveyor (13) to the outlet conveyor (14) and to assume, once the head end of the strip (4) has been released onto the outlet conveyor (14), a variable tensioning position, wherein it engages the strip (4) so as to form a bend along the path of the strip (4).

IPC Classes  ?

• B29D 30/16 - Applying the layersGuiding or stretching the layers during application
• B29D 30/30 - Applying the layersGuiding or stretching the layers during application

Abstract

A bidirectional telescopic guide (1) having a connection bar (2), a first (5) and a second shaft (6) movable in opposite directions with respect to the connection bar (2) in a longitudinal direction (7), a first (10) and a second guide and slide assembly (11) for coupling the first shaft (5) to the connection bar (2) and the second shaft (6) to the first shaft (5), respectively, and a motorized drive (12) for both shafts (5 and 6); the motorized drive being driven by a single motor (38) and having a pair of racks (32 and 33), one solidly connected to a connection bar (2) and the other to the second shaft (6), and both meshing with a single pinion (35) driven by the motor (38) and rotatably mounted on first shaft (5).

IPC Classes  ?

• F16C 29/00 - Bearings for parts moving only linearly
• B23Q 1/60 - Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only two sliding pairs only
• F16H 19/04 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion comprising a rack

Abstract

A tyre building apparatus (1) comprising a drum (2) formed by two half-drums (7, 8), which are specular with respect to a centre plane (4) of the drum (2), are axially relatively movable and are angularly coupled to a respective shaft (5; 16) to rotate about a common axis (3); the apparatus (1) being equipped with a first actuating device (6) to rotate the drum (2) about the axis (3) and continuously vary the distance between the two half-drums (7, 8); and a second actuating device (39) to radially move the drum (2) between a configuration of maximum radial expansion and a configuration of maximum radial contraction; the first actuating device (6) being placed outside the drum (2) to axially move the half- drums (7, 8) via a relative telescopic movement of the respective shafts (5, 16); and the second actuating device (39) being arranged on board the drum (2) and being operable independently of the first actuating device (6) and of the movement of the shafts (5, 16) of the two half-drums (7, 8).

IPC Classes  ?

• B29D 30/24 - Drums

Abstract

A tyre carcass building drum (1) having a longitudinal axis (3) and two half-drums (6) movable along the longitudinal axis (3) in opposite directions away from and towards a centre plane (4) of the drum (1), each one comprising a bead carrying device (16) defining a saddle and a turn-up device (41) designed to turn up a annular side portion (42) of a carcass ply around, and on the outside of, a respective bead ring; the turn-up device (43) having an end portion arranged, at rest, along a peripheral annular portion (18) of the saddle (17) and shaped so as to define an extension of the curvilinear profile of the saddle (17); and thrust means (50) being provided to directly and independently exert an axial thrust and a radial thrust on the turn-up device (43). The invention also relates to an operating method of said drum.

IPC Classes  ?

• B29D 30/32 - Fitting the bead-rings or bead-coresFolding the textile layers around the rings or cores

Abstract

A method and machine (A) for producing a tyre component part by gradually depositing a strip (7) of elastomeric material on a toroidal surface (4) of a support (1) rotating about its axis (3); the machine incorporating an applicator roller (9) and a pressure roller (13) for respectively applying and pressing the strip (7) on the surface (4), and which are moved simultaneously crosswise to a deposition path (P) of the strip (7), so that a contact point (15) between the applicator roller (9) and the surface (4) moves in a radial plane (Pi) of the support (1), and a contact point (15) between the pressure roller (13) and the surface (4) moves on a surface (S) generally parallel to the radial plane (Pi); the pressure roller (13) being mounted to oscillate about an axis (19), which is moved simultaneously with the two rollers (9, 13) so as to translate parallel to the radial plane (Pi).

IPC Classes  ?

• B29D 30/14 - Rolling-down or pressing-down the layers in the building process
• B29D 30/28 - Rolling-down or pressing-down the layers in the building process

Abstract

A system (1A; 1B; 1C) for supporting tyres (3), wherein a tubular support (2), insertable through a tyre (3) having two beads (6) a given distance apart, has a tubular body (7, 15) fitted with two bladders (35), which are located the aforementioned given distance apart, are connected to compressed-air circuits (19, 24, 25), and are each located inwards of a respective bead (6) to lock the bead (6) in position with respect to the tubular body (7, 15) when the bladder is inflated.

IPC Classes  ?

• B29D 30/06 - Pneumatic tyres or parts thereof

Abstract

To build a tyre carcass (2), a tubular carcass body (2) is formed about a building drum (1), which has a longitudinal axis (3), and an outer surface (4) coaxial with the longitudinal axis (3) and defined at least partly by a ring of longitudinal articulated rods (21) lying in respective planes of a sheaf of planes through the longitudinal axis (3); the building drum (1) locking two bead bundles (28) to the tubular carcass body (2) and torus -shaping the tubular carcass body (2) by moving and/or deforming the articulated rods (21) in their planes.

IPC Classes  ?

• B29D 30/24 - Drums

Abstract

To form a tyre carcass (2), a body ply (20) is wound about a drum (1), which has two half -drums (5) movable axially in opposite directions to and from a centre plane (4) of the drum (1), and having respective turn-up bladders (8; 34), on each of which is laid a respective annular lateral portion (23) of the body ply (20); each annular lateral portion (23) being turned up about a respective bead bundle (7) and onto a sidewall (24) of a toroidal -shaped annular central portion (22) of the body ply (20) by inflating the relative turn-up bladder (8; 34) and controlling distension of a given annular portion (12; 38) of the turn-up bladder (8; 34) so that, when inflation is completed, the annular portion (12; 38) assumes a given final position, in which an intermediate portion of the turn-up bladder (8; 34) rolls outwards along the relative sidewall (24) of the annular central portion (22) of the body ply (20).

IPC Classes  ?

• B29D 30/32 - Fitting the bead-rings or bead-coresFolding the textile layers around the rings or cores
• B29D 30/24 - Drums

Abstract

A tyre building drum, wherein a spindle (4) has an axis (6), and a first and second flange (19, 20) coaxial with the axis (6) and movable axially with respect to each other to support and shape a tyre carcass (3), and is fitted to and projects from a drive unit (5) for rotating the first and second flange (19, 20) about the axis (6), and for varying a distance between the first and second flange (19, 20); the first flange (19) being fixed to the free end of an end portion (15a) of a drive shaft (15) of the drive unit (5) to rotate about the axis (6) with the drive shaft (15); and the second flange (20) being fitted in axially sliding, angularly fixed manner to the end portion (15a) of the drive shaft (15).

IPC Classes  ?

• B29D 30/00 - Producing pneumatic or solid tyres or parts thereof
• B29D 30/24 - Drums

Abstract

A feed unit (11) for feeding elastomeric material (9), extruded by at least one extruder (8), to at least one user unit (10), and wherein a variable-length conveyor (38) is supported by a first and a second supporting device (65, 66) located at an input end and an output end of the conveyor (38) respectively; and wherein the first supporting device (65) is connected to the conveyor (38) to allow the conveyor (38) to rotate about a vertical first axis (79) and a horizontal second axis (81), both crosswise to a travelling direction (39) of the elastomeric material (9) along the conveyor (38); the second supporting device (66) is extensible vertically and connected to the conveyor (38) by a first releasable joint (94); and the conveyor (38) is connectable to the user unit (10) by a second releasable joint (27).

IPC Classes  ?

• B29D 30/16 - Applying the layersGuiding or stretching the layers during application
• B29D 30/30 - Applying the layersGuiding or stretching the layers during application
• B65G 21/12 - Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively- movable partsDevices for moving framework or parts thereof to allow adjustment of position of load-carrier or traction element as a whole
• B29D 30/60 - Applying bands of rubber treads, i.e. applying camel backs by winding narrow strips