A process and an apparatus for cutting a continuous rubber-covered belt in a process for building tyres for vehicle wheels, wherein the apparatus includes a cutting group, in turn comprising: a knife formed by a first half-part and a second half-part and movable along a cutting direction that is tilted with respect to a supply direction of a rubber-covered belt placed beneath the knife. The process includes: lifting a lifting element placed below the continuous rubber-covered belt and at the cutting zone, until a portion of rubber-covered belt is lifted, and lowering the single first-half part of the knife, making it slide with respect to the second half-part.

A process and an apparatus for cutting a continuous rubber-covered belt in a process for building tyres for vehicle wheels, wherein the apparatus includes a cutting group, in turn comprising: a knife formed by a first half-part and a second half-part and movable along a cutting direction that is tilted with respect to a supply direction of a rubber-covered belt placed beneath the knife. The process includes: lifting a lifting element placed below the continuous rubber-covered belt and at the cutting zone, until a portion of rubber-covered belt is lifted, and lowering the single first-half part of the knife, making it slide with respect to the second half-part.

A process for building different models of green tyres for vehicle wheels, by using elementary semi-finished products, in a building plant including a plurality of workstations is described. The process includes building a first carcass structure of a first model of tyre on a first forming support, in a first workstation, the first carcass structure including at least one first carcass ply obtained from a first elementary semi-finished product, and at least one first pair of annular reinforcing inserts. The process includes the delivery of the first forming support to a bypass device to go beyond at least one second workstation without transiting through it. A plant suitable for allowing the aforementioned process to be carried out is also described.

A process for building different models of green tyres for vehicle wheels, by using elementary semi-finished products, in a building plant including a plurality of workstations is described. The process includes building a first carcass structure of a first model of tyre on a first forming support, in a first workstation, the first carcass structure including at least one first carcass ply obtained from a first elementary semi-finished product, and at least one first pair of annular reinforcing inserts. The process includes the delivery of the first forming support to a bypass device to go beyond at least one second workstation without transiting through it. A plant suitable for allowing the aforementioned process to be carried out is also described.

A tire includes: a tire frame member formed in a ring shape from a frame resin material, and including a pair of bead sections, a pair of side sections, and a crown section; a ring shaped bead core that is embedded in and joined to each of the bead sections, and that is formed by a single strand, or plurality of strands, of bead cord extending in the tire circumferential direction, and covered with, and joined to, a covering resin material; and an extension portion that extends from each of the bead cores in a direction that intersects with the tire circumferential direction when viewed from a tire side face, and that is joined to the tire frame member.

The present invention provides a method for improving the construction process of a wide-base radial truck tire, and the improvement of the tire construction process is realized by the design of carcass ply, the tire belt drum and the tire semi-finished components. The invention solves the problem of carcass bending, and provides theoretical guidance and technical support for improving the performance of wide-angle radial tires. The design method of the belt drum of the tire molding machine effectively controls the cords elongation of the belt. In addition, the problem of uneven force in the cords of the belt is eliminated, which dispels the abnormal flow of the wide-base tire shoulder rubber to the center of the crown during the shaping process, thus improving the durability and operability of the tire. The proposed semi-finished components design method in this invention can accurately design the tire semi-finished parts material distribution map, significantly improve the finished tire and the theoretical design of tire material distribution consistency, thus reducing tire development cycle and development costs.

The present invention provides a method for improving the construction process of a wide-base radial truck tire, and the improvement of the tire construction process is realized by the design of carcass ply, the tire belt drum and the tire semi-finished components. The invention solves the problem of carcass bending, and provides theoretical guidance and technical support for improving the performance of wide-angle radial tires. The design method of the belt drum of the tire molding machine effectively controls the cords elongation of the belt. In addition, the problem of uneven force in the cords of the belt is eliminated, which dispels the abnormal flow of the wide-base tire shoulder rubber to the center of the crown during the shaping process, thus improving the durability and operability of the tire. The proposed semi-finished components design method in this invention can accurately design the tire semi-finished parts material distribution map, significantly improve the finished tire and the theoretical design of tire material distribution consistency, thus reducing tire development cycle and development costs.

To accurately cut a ply for a tire. It is a cutting device 1 for cutting a ply 10 for a tire in which a plurality of cords 12 parallelly arranged at fixed pitches are coated with an unvulcanized topping rubber 10. It has a pitch increasing means 2 for increasing the pitches of the cords 12 by pressing the ply 10 from a second surface 10b side to a first surface 10b side of the ply 10 so as to stretch the ply 10 toward the first surface 10a side; and a ply cutting means 3 disposed on the first surface 10a side of the ply 10, for cutting the stretched portion of the ply 10 along the cords 12.

To accurately cut a ply for a tire. It is a cutting device 1 for cutting a ply 10 for a tire in which a plurality of cords 12 parallelly arranged at fixed pitches are coated with an unvulcanized topping rubber 10. It has a pitch increasing means 2 for increasing the pitches of the cords 12 by pressing the ply 10 from a second surface 10b side to a first surface 10b side of the ply 10 so as to stretch the ply 10 toward the first surface 10a side; and a ply cutting means 3 disposed on the first surface 10a side of the ply 10, for cutting the stretched portion of the ply 10 along the cords 12.

A weight applicator including a weight applicator head and at least one actuator is disclosed. The weight applicator head is adapted to carry a wheel balance weight and has a weight application surface with a weight retaining region and a leading rotation region. The at least one actuator is coupled to the weight applicator head for manipulating the weight applicator head in at least one direction. The at least one direction has a radial component. The leading rotation region is oriented to extend radially further than the weight retaining region.