Abstract:
A toroidal forming drum and a process for budding tyres. The toroidal forming drum is expanded within a shaped carcass sleeve for supporting the carcass sleeve against an abutment surface externally provided by the forming drum. An elementary semi--finished product is applied around the shaped carcass sleeve by pressing the elementary semi-finished product toward the abutment surface. The abutment surface has circumferential rows of solid portions alternated with hollow portions. The solid portions, arranged along axially opposite circumferential edges of the abutment surface, have a transverse size between 10% and 60% of a transverse size presented by the solid portions arranged in proximity to an axial centreline plane of the abutment surface.
Abstract:
A plant for building tyres 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 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 plant, a method and a process for building tyres 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 tyre 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 tyre being processed on the forming drum without the pair of support rings in a work station of the carcass structure building line.
Abstract:
Provided are a method and a device for efficiently separating and automatically removing a tire-building rigid core from the inside of the tire. After a core holding mechanism and upper and lower support plates are removed from a rigid core body that is disposed in the tire and composed of two types of segment groups, the tire is transferred onto a predetermined position on a support table, and positioned and fixed. Then, a first core separation/removal mechanism having been on standby below the center of the tire on the support table is raised to support the center of the inner wall surface of one type of the segment groups and horizontally pull the one type of the segment groups to the center side of the tire until it is separated from the inner surface of the tire. The separated segment group is lowered to the standby position below the center of the support table and is left on standby. Next, in the same way as above, the other type of the segment groups is separated from the inner surface of the tire and moved to a standby position by a second core separation/removal mechanism having been on standby at another standby position.
Abstract:
Provided are a method and a device for efficiently separating and automatically removing a tire-building rigid core from the inside of the tire. After a core holding mechanism and upper and lower support plates are removed from a rigid core body that is disposed in the tire and composed of two types of segment groups, the tire is transferred onto a predetermined position on a support table, and positioned and fixed. Then, a first core separation/removal mechanism having been on standby below the center of the tire on the support table is raised to support the center of the inner wall surface of one type of the segment groups and horizontally pull the one type of the segment groups to the center side of the tire until it is separated from the inner surface of the tire. The separated segment group is lowered to the standby position below the center of the support table and is left on standby. Next, in the same way as above, the other type of the segment groups is separated from the inner surface of the tire and moved to a standby position by a second core separation/removal mechanism having been on standby at another standby position.
Abstract:
A machine for manufacturing tires (P) using at least one core (N) used as a reference surface of the manufacture of the tires (P) by moving consecutively from one manufacturing station to another from the start of assembly through to vulcanisation, comprising a first line of stations, oriented in a horizontal direction XX′, capable of receiving the core whose axis of rotation rr′ is oriented horizontally, and a second line of stations (200, 300, 300′), oriented in a horizontal direction YY′, perpendicular to the direction XX′, in which the stations are capable of receiving a core (N) whose axis rr′ is oriented vertically. The first line of stations comprises a first (120) and a second (130) station for assembling the tire including member (121, 131) for grasping and driving the core (N) in rotation about a horizontal axis rr′, merged with the axis XX′, such members being placed opposite one another. A turning device (110) is movable in the direction XX′ and is capable of transferring the core from one station to another within the first line of stations (120, 130) by making the axis rr′ of the core effect a translation along the axis XX′ and a rotation of 180° about a horizontal axis yy′ parallel to the direction YY′.
Abstract:
A process for building tyres for vehicle wheels are disclosed, wherein said building process comprises the following steps carried out in a carcass structure building line: 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 tyre being processed on the forming drum provided with said 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 in a temporary storage for support rings; e) building at least one further structural component of the tyre being processed on the forming drum without the pair of support rings in a work station of the carcass structure building line.
Abstract:
Trough use of an applicator, a rubber strip is supplied to the drum side surface in a conveyance direction at a right angle to a reference line extending over the drum side surface from the shaft center of the drum outward in the radial direction. The supplied rubber strip is pressed against and affixed to the drum side surface using an affixing roller. The affixing roller is supported so as to be able to rotate about a roller shaft center parallel to the reference line. The roller shaft center is disposed at a distance (L) downstream from the reference line in the drum rotation direction.
Abstract:
A plant and a process for producing tires wherein the process includes the steps of: a) building a green tire on a toroidal support in a building line of a tire production plant; b) transferring the green tire and the relevant toroidal support from the building line of the production plant to a first holding unit; c) transferring the green tire and the relevant toroidal support from the first holding unit to a vulcanization line of the production plant; d) molding and vulcanization the green tire in the vulcanization line of the production plant; e) separating the molded and vulcanized tire from the relevant toroidal support; f) transferring the toroidal support, separated from the relevant tire, from the vulcanization line to the first holding unit; and g) transferring the toroidal support, separated from the relevant tire, 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 through a second transfer device different from the first transfer device.