METHOD AND TYRE BUILDING DRUM FOR BUILDING A TYRE

摘要

When building an unvulcanised tyre from tyre components using a tyre building drum (1), the mutual distances considered in axial direction between a bead ring segment (3), a first end and a steering element (14) of a folding arm (7) in question are chosen such that at: movement of a steering element (12) towards the bead ring segment (3) a steering surface (13) comes to abut the steering element (14) so that a roller element (8) can be moved from a first position, after which the roller element presses an outer part of the tyre components against a bead ring core to be placed on the bead ring segment while simultaneously the roller element moves away from the longitudinal axis, wherein the steering element moves along the steering surface until the stop of the annular steering segment abuts an annular folding arm segment, after which the folding arm swivels about a swivel axle (9) and the steering element comes to lie apart from the steering surface.