PROCESS AND APPARATUS FOR BUILDING TYRES

摘要

Two auxiliary support members are operatively engaged with a building drum, in axially approached relationship with respective halves of the drum itself, each auxiliary member having a circumferential rest surface extending in the continuation of an outer circumferential surface of the building drum itself. Applied around the outer circumferential surface of the building drum is at least one carcass ply having axially opposite end flaps each lying on the circumferential rest surface of the respective auxiliary support member. A pair of auxiliary shaping members engaged with the building drum in place of the auxiliary support members, each act against a circumferential abutment edge carried by the building drum, to enable the carcass ply to be shaped into a toroidal configuration concurrently with mutual approaching of the halves of the building drum.

主权项

1. An apparatus for building tyres, comprising:
a building drum comprising two halves capable of being axially moved close to each other and having at least one outer circumferential surface designed to support at least one carcass ply applied around the building drum; auxiliary support members configured for removable engagement with the building drum and each having at least one circumferential rest surface extending in a continuation of an outer circumferential surface of the building drum, each of said auxiliary support members being in axially approached relationship with one of said two halves of the building drum and being configured for engagement with the building drum at at least one connecting member until after application of at least one carcass ply around the outer circumferential surface of the building drum; and at least one auxiliary shaping member distinct from said building drum, configured for removable engagement with the building drum to enable a toroidal conformation of said at least one carcass ply concurrently with mutual approaching of said halves of the building drum, wherein each auxiliary shaping member is configured for being engaged on said at least one connecting member in place of each auxiliary support member after application of said at least one carcass ply, and wherein a radially external surface of a sealing ring of said at least one auxiliary shaping member is configured to act against a circumferential abutment edge of said at least one carcass ply carried by the building drum.