Patent ID: 9724884
Date: 2017-08-08
CPC Classifications: B29D,Y10T

Claim:
1. Equipment for moulding and curing a green tyre, comprising: a curing mould comprising a first bead moulding ring including a first surface for contacting a radially inner and axially inner surface portion of an annular fixing structure of said green tyre and a first sidewall plate including a second surface for contacting a radially inner and axially outer surface portion of said annular fixing structure, said first bead moulding ring and said first sidewall plate being movable with respect to each other so as to bring a portion of said first surface and a portion of said second surface into contact with said radially inner and axially inner surface portion and said radially inner and axially outer surface portion, respectively, wherein said first bead moulding ring is radially extendable from a contracted operating position to an expanded operating position so as to delimit said portions of said annular fixing structure between said first sidewall plate and said first bead moulding ring, and wherein said first bead moulding ring is translatable towards said first sidewall plate for generating a first squeezing pressure on said annular fixing structure; and an inflatable bladder associated for operation with said curing mould and capable of exerting a pressure against at least one of said first and said second surfaces, so as to translate said first bead moulding ring further towards said first sidewall plate in such a way that said radially inner and axially inner surface portion and said radially inner and axially outer surface portion of said annular fixing structure are shaped by using a second squeezing pressure greater than said first squeezing pressure, wherein said first bead moulding ring comprises at least two circumferentially alternating elements, which are movable from a first contracted operating position forming a maximum diameter smaller than the diameter of said annular fixing structure to a second, expanded operating position having a maximum diameter greater than the diameter of said annular fixing structure, and wherein the first and second operating positions lie in a circumferential plane of said green tyre.