A tire building method, in particular for strip-winding, includes the step of: providing a choice between a production mode for building a tire component and a test mode for obtaining test measurements, wherein the choice is provided prior to executing the test mode;
wherein at least one or more building parameters is set prior to the building of the tire component based on test measurements performed on a test strip during the test mode.

Also disclosed is a tyre building system and a measurement tool.

A device and a method for feeding a sheet material are provided. A conveying machine is disposed above a holding machine. A sensor detects a lateral position of a rubber sheet fed from the holding machine. At a position between a grip position below the conveying machine and a release position at an upstream side in a conveying direction above the conveying machine, a leading edge of the rubber sheet is gripped by a gripping machine. The gripping machine is revolved and moved to the release position using, as a revolution center, a position in a vertical direction midway between the grip position and the release position. The leading edge being released is pressed against a placement surface of the conveying machine by a pressing portion. The rubber sheet is placed on the placement surface and conveyed to a downstream side in the conveying direction by the conveying machine.

An apparatus for manufacturing a tire component member includes a first conveyor configured to convey a sheet-shaped rubber member; a second conveyor configured to receive the sheet-shaped rubber member from the first conveyor and to convey the same to a molding drum; sensors configured to detect a position of an end portion in a width direction of the sheet-shaped rubber member to move from the first conveyor to the second conveyor; a moving part configured to move the molding drum in the width direction of the sheet-shaped rubber member, and a control unit configured to move the molding drum in the width direction of the sheet-shaped rubber member and to bond the sheet-shaped rubber member to a predetermined position on the molding drum, in correspondence to the position of the end portion in the width direction of the sheet-shaped rubber member detected by the sensors.

An apparatus for manufacturing a tire component member includes a first conveyor configured to convey a sheet-shaped rubber member; a second conveyor configured to receive the sheet-shaped rubber member from the first conveyor and to convey the same to a molding drum; sensors configured to detect a position of an end portion in a width direction of the sheet-shaped rubber member to move from the first conveyor to the second conveyor; a moving part configured to move the molding drum in the width direction of the sheet-shaped rubber member, and a control unit configured to move the molding drum in the width direction of the sheet-shaped rubber member and to bond the sheet-shaped rubber member to a predetermined position on the molding drum, in correspondence to the position of the end portion in the width direction of the sheet-shaped rubber member detected by the sensors.

One or more embodiments of the present invention provide a method for applying a dual compound coextruded continuous strip of a first compound and a second compound, the method comprising a first extruder for processing a first compound and a second extruder for processing a second compound, wherein the outlet from the first extruder is in fluid communication with a first channel of a housing, and the outlet from the second extruder is in fluid communication with a second channel of the housing, wherein a gear pump is positioned in each channel, wherein a nozzle is in fluid communication with an outlet of the first channel and an outlet of the second channel, and a coextruded continuous strip is produced. The ratio of the first compound to the second compound may be adjusted instantaneously.

The comprises at least one module for stitching the tread and a means for moving the module vertically and horizontally. The stitching module comprises a frame which is provided with a fixed stitching assembly, equipped with spikes, and at least one mobile stitching assembly. The at least one mobile stitching assembly comprises at least one stitching plate provided at the base of same with at least one planar horizontal contact surface, from which at least two spikes protrude. The plate is arranged in a vertical guide space provided in the frame such that the spikes protrude downwards and such that it is free to move vertically in this space over a limited travel path. The device also includes a vertical movement device for moving the plate from the top downwards in this guide space and a device for locking the altitude position of the plate in this space.

Test conditions including the number of windings of winding a ribbon rubber around a forming drum and a feed pitch for moving the ribbon rubber in an axial direction of the forming drum for each rotation of the forming drum are set, and a test sample is prepared under the test conditions. A thickness distribution in a width direction of the prepared test sample is measured, and the thickness distribution in the measured width direction is compared with the target shape to specify the ribbon rubber located at a portion in which a thickness deviation amount exceeds a predetermined range. Then, the feed pitch of the specified ribbon rubber is changed to prepare the tire component member.

An object of the present invention is to form a tire component member having a desired shape by a ribbon winding method without depending on skill and experience of an operator. Test conditions including the number of windings of winding a ribbon rubber around a forming drum and a feed pitch for moving the ribbon rubber in an axial direction of the forming drum for each rotation of the forming drum are set (Step S11), and a test sample is prepared under the test conditions (Step S12). With respect to the prepared test sample, a width, a cross-sectional area, and a thickness distribution in a width direction are measured (Step S13). Based on these results, the test conditions are corrected to obtain a correction condition (Steps S14 to S19).

The machine includes a tire-building zone for producing, on a drum, a carcass entity that includes a carcass ply with carcass reinforcers. The machine also includes a finishing zone for producing a crown entity that includes a tread, a shaping system for causing the carcass entity to expand radially in order to give it a toroidal shape. In an assembling zone, the crown entity is assembled on the carcass entity. A biasing system interacts, during the shaping, with the carcass reinforcers so as to modify the angular orientation of the carcass reinforcers with respect to the circumferential direction of the drum. An automatic control unit allows a biased-crown tire to be manufactured in this way.

Method for controlling the feed of semifinished products in a tyre building process, said method comprising: feeding a semifinished product (10) into a building station (30) adapted to build, through said semifinished product (10), a structural component of a tyre; performing, in an acquisition zone (AZ), a verification to verify the presence of at least one defect of said semifinished product (10); generating a notification signal (NS) as a function of said verification; activating, as a function of said notification signal (NS), a discard device (60), configured for discarding at least one portion of said semifinished product (10) comprising said at least one defect.