Device and method for analysis of tyres are presented. The device includes a support frame, a flange, and first/second image acquisition systems. According to one aspect, the first acquisition system is two-dimensional and includes a first camera having a first optical axis, a first focal plane, a first focal point, and a first depth of field, and a first illumination system that illuminates around the first focal point. According to another aspect, the second image acquisition system is three-dimensional and includes a second camera having a second optical axis, a second focal plane, and a second depth of field, and a second illumination system. A translation plane, substantially orthogonal to the first optical axis, is defined by the first focal point, and an intersection between the second optical axis and the second depth of field.

A first forming apparatus includes a forming drum, a forming unit, a conveyance path, and a conveyance unit that conveys the forming drum along the conveyance path. A tire member is formed with tire components wound on the forming drum by the forming unit. The first forming apparatus also includes a measurement unit that performs, on a downstream side of the forming unit in the conveyance path, measurement on the tire components wound on the forming drum while the forming drum is moving through the measurement unit, in a tire radial direction over a width direction of the forming drum, and an inspection unit that performs inspection on winding states of the tire components based on a measurement result due to the measurement unit.

The present invention is relative to a method for building tyres for vehicle wheels and to a transfer device (16) of an apparatus for building tyres for vehicle wheels. The centring device (16) comprises: an annular support structure (18); gripping elements (19) arranged as a ring on the annular support structure (18) and having gripping surfaces (20) directed radially towards a longitudinal axis (Z-Z) of the transfer device (16); a measurement device (30) mounted on the annular support structure (18). The measurement device (30) is configured for detecting the centring between the transfer device (16) and a drum (12, 13) situated within the transfer device (16). The transfer device (16) is configured for picking up the tyre being processed (14, 15) from the drum (12, 13) on which the tyre being processed is arranged or for depositing a tyre being processed (14, 15) on the drum (12, 13).

A system for leak testing an envelope for a tire assembly can include a rim, an envelope sized to accommodate a green tire assembly and secured to the rim, a vacuum system in fluid communication with the envelope, and a controller. The controller can be configured to pressurize the envelope to a predetermined pressure, compare a slope of pressure over time to a predetermined value, and enable proceeding with a depressurization of the envelope responsive to determining the slope of the pressure over time being more than or equal to the predetermined value.

An apparatus for checking tyres is described. The apparatus has a first check unit having an inlet for tyres and a plurality of check tools. The apparatus also has a second check unit having an outlet for the tyres and a plurality of check tools. The apparatus further has an overturning and transport device operatively interposed between the first check unit and the second check unit. The first check unit, the second check unit and the overturning and transport device define a check path configured to be traversed by each tyre step by step. The first check unit and the second check unit have the same check tools configured for executing the same checks on respective axial halves of the tyres.

A method for checking a continuous elongated element during the building of a tyre for vehicle wheels. A beam of an electromagnetic radiation is projected on a section of the continuous elongated element dispensed by a dispensing head and interposed between the dispensing head and a first contact area of the continuous elongated element with a radially outer surface of a tyre being processed. An image of a radiation reflected by the section is acquired. A first parameter related to the image is detected, and the first parameter is compared with a second reference parameter.

In a device for winding a strip-shaped rubber member, a measured width and a measured thickness of a strip-shaped rubber member immediately before winding are measured by a measuring section at measurement point P. On the other hand, from a target width and a target thickness of the strip-shaped rubber member that are derived from a target sectional shape of a tread, an estimated width and an estimated thickness of the strip-shaped rubber member at the measurement point P are determined while taking deformation of the strip-shaped rubber member into consideration. Differences between the measured width and the estimated width, and between the measured thickness and the estimated thickness at each corresponding length direction position are determined.

A test method of accurately evaluating wear resistance performance of a rubber material when used as a tread rubber of a tire, comprises the steps of: preparing a test piece of the rubber material having a ground contact surface extending in a circumferential direction; abrading the ground contact surface by rolling the test piece on a running surface of a wear testing machine at a slip ratio of not more than 3.5%; and evaluating the wear resistance performance of the test piece by comparing the amount of wear of the test piece with a predetermined threshold value.

A tire data processing device includes: a data acquisition unit to acquire surface shape data indicating a tire surface shape; a reference point setting unit to set a reference point having a radial direction value predetermined at each of a plurality of axial positions in a tire axial direction; a symmetrical reference point selection unit to select, from a plurality of the reference points, a pair of reference points disposed at symmetrical axial positions with respect to a tire equatorial plane; a reference point replacement unit to replace one or both of the pair of reference points such that radial direction values of the pair of reference points are coincident with each other; and a comparison result generation unit to compare the pair of reference points having the coincident radial direction value with a measurement point cloud of the surface shape data to generate a comparison result predetermined.

An assembly (10) for positioning sensors within a tire is provided that has first and second bead sensors (14,16), and first and second side-wall/shoulder sensors (18, 20). A first actuator (30) moves the sensors in a radial direction of the tire, and a second actuator (32) moves the first and second bead sensors in the axial direction of the tire. A third actuator (34) is present and moves the first and second bead sensors in the axial direction relative to the first and second sidewall/shoulder sensors. A fourth actuator (36) moves the first and second bead sensors in the axial direction relative to one another, and a fifth actuator (38) moves the first and second sidewall/shoulder sensors in the axial direction relative to one another.