Abstract: A method for arranging elongated elements in a process for building tyres for vehicle wheels, including: arranging a first winding support with a first elongated element of a first type wound on the first winding support; arranging a second winding support with a second elongated element of a second type different from the elongated element of the first type wound on the second winding support; arranging a coupling device including a first coupling body and a second coupling body rotatable with respect to one another about a rotation axis; and arranging the first winding support on the first coupling body and the second winding support on the second coupling body.

Abstract: A plant for building tyres for vehicle wheels includes a gripping ring arranged in a fixed reference position. A first stage building line defines a closed first-stage path for the movement of a plurality of building drums and an open first-stage path for building and moving carcass sleeves being processed. A second stage building line defines a closed second-stage path for the movement of a plurality of auxiliary drums and an open second-stage path for building and moving a plurality of outer sleeves being processed. The open second-stage path and the open first-stage path terminate at the gripping ring configured for carrying out a radially outer contrast function during the shaping of a first carcass sleeve being processed and the assembly thereof with a first outer sleeve being processed.

Abstract: A method for building tyres for vehicle wheels is described. Second stage forming drums are moved in a crown structure building line for building respective crown structures. Movement occurs along a first path for building a first part of components of the crown structure and a second path for building a second part of components of the crown structure. Additionally, first stage forming drums are moved in a carcass structure building line for building respective carcass structures. The flow of the second stage forming drums is managed through a first manipulator, while the flow of the first stage forming drums is managed through a second manipulator.

Abstract: An apparatus for producing a semi-finished product with a strip of sealing compound for building tyres, having at least one unsaturated styrene thermoplastic elastomer, one bonding resin and one cross-linking agent is described.

Abstract: An apparatus for producing a semi-finished product with a strip of sealing compound for building tyres, having at least one unsaturated styrene thermoplastic elastomer, one bonding resin and one cross-linking agent is described.

Abstract: An apparatus, and relative method, for producing a semi-finished product with a strip of sealing compound for building tires, having at least one unsaturated styrene thermoplastic elastomer, one bonding resin and one cross-linking agent are described.

Abstract: An apparatus, and relative method, for producing a semi-finished product with a strip of sealing compound for building tyres, having at least one unsaturated styrene thermoplastic elastomer, one bonding resin and one cross-linking agent are described.

Abstract: A compound plant for processing elastomeric compounds for tires with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring. In operation, a first elastomeric compound is discharged from the at least one batch mixing device and processed with the at least one multi-shaft continuous mixing device to obtain a second elastomeric compound.

Abstract: An apparatus for extruding a polymeric material, having an extrusion head which includes a male die, a female die coaxially arranged with respect to the male die, a conveying channel, and at least one portion of which is defined between the male die and the female die. The apparatus further includes a device for adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material.

Abstract: An apparatus for extruding a polymeric material, having an extrusion head which includes a male die, a female die coaxially arranged with respect to the male die, a conveying channel, and at least one portion of which is defined between the male die and the female die. The apparatus further includes a device for adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material.

Abstract: A multiscrew extruder device for production of elastomeric compounds is intended for manufacturing tires for vehicle wheels. The device includes a holding body; a mandrel inserted in the holding body extending along a longitudinal axis and delimiting an annular chamber with the holding body; and a plurality of extrusion screws disposed in the annular chamber and parallel to the longitudinal axis. A first circuit for a heat-exchange fluid for temperature control is formed in the mandrel and includes a central channel extending in the mandrel along the longitudinal axis and a plurality of parallel peripheral channels extending in a peripheral portion of the mandrel close to the annular chamber and in fluid communication with the central channel.

Abstract: A compound plant for processing elastomeric compounds for tires with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring. In operation, a first elastomeric compound is discharged from the at least one batch mixing device and processed with the at least one multi-shaft continuous mixing device to obtain a second elastomeric compound.

Abstract: A compound plant for processing elastomeric compounds for tyres with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring. In operation, a first elastomeric compound is discharged from the at least one batch mixing device and processed with the at least one multi-shaft continuous mixing device to obtain a second elastomeric compound.

Abstract: An apparatus for extruding a polymeric material, having an extrusion head which includes a male die, a female die coaxially arranged with respect to the male die, a conveying channel, and at least one portion of which is defined between the male die and the female die. The apparatus further includes a device for adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material.

Abstract: A method for extruding a polymeric material includes the steps of: a) feeding the polymeric material to an extrusion apparatus including an extrusion head, the extrusion head including: a male die; a female die coaxially arranged with respect to the male die; a conveying channel, at least one portion of which is defined between the male die and the female die; and b) adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material. An extrusion apparatus and a process for manufacturing a tire which uses the extrusion apparatus, are also disclosed.

Abstract: An extrusion device for producing elastomeric compounds, includes a holding body internally confining a chamber and at least one extrusion screw disposed in the chamber. The device further includes a plurality of interchangeable extrusion heads alternatively installed on the holding body at a discharge opening of the chamber. The choice of using a type of head rather than another or leaving the discharge opening free is carried out based on the physico-chemical features of the elastomeric compound to be treated, so as to maintain the temperature and/or pressure of the outgoing compound under critical threshold values for such a compound.

Abstract: A process for continuously producing an elastomeric composition includes metering and feeding at least one elastomer and at least one filler into at least one extruder, mixing and dispersing the at least one filler into the at least one elastomer using the at least one extruder, and passing the composition that results through at least one static mixer. An apparatus for continuously producing the composition includes at least one twin-screw extruder, at least one metering device, and at least one static mixer. The at least one extruder includes a housing and two screws rotatably mounted in the housing. The housing includes at least one feed opening and a discharge opening. The at least one metering device meters and feeds at least one elastomer and at least one filler into the at least one extruder. The composition discharged from the discharge opening passes through the at least one static mixer.

Abstract: A compound plant for processing elastomeric compounds for tyres with both a high quality and a high throughput includes at least one batch mixing device in combination with at least one multi-shaft continuous mixing device having a high number of shafts. For example, the multi-shaft continuous mixing device could be a ring extruder having a plurality of co-rotating screws disposed to form a ring.

Abstract: A process for continuously producing an elastomeric composition includes metering at least one elastomer, at least one filler, and at least one minor ingredient; feeding the at least one elastomer, the at least one filler, and the at least one minor ingredient into at least one extruder; mixing and dispersing the at least one filler and the at least one minor ingredient into the at least one elastomer using the at least one extruder; obtaining a subdivided product from a resulting elastomeric composition discharged from the at least one extruder; accumulating an amount of the subdivided product; and stirring the accumulated amount of the subdivided product. An apparatus for continuously producing an elastomeric composition includes at least one extruder, at least one first metering device, at least one second metering device, at least one device for obtaining a subdivided product, and at least one accumulating and stirring device.

Abstract: A multiscrew extruder device for production of elastomeric compounds is intended for manufacturing tyres for vehicle wheels. The device includes a holding body; a mandrel inserted in the holding body extending along a longitudinal axis and delimiting an annular chamber with the holding body; and a plurality of extrusion screws disposed in the annular chamber and parallel to the longitudinal axis. A first circuit for a heat-exchange fluid for temperature control is formed in the mandrel and includes a central channel extending in the mandrel along the longitudinal axis and a plurality of parallel peripheral channels extending in a peripheral portion of the mandrel close to the annular chamber and in fluid communication with the central channel.