Method of controlling a phase of moulding an annular fixing structure and a tyre including an annular fixing structure

摘要

A method for controlling a phase of molding an annular fixing structure of a green tire includes: introducing the green tire into a curing mold including an inflatable bladder; delimiting at least one portion of the annular fixing structure by using a first and a second surface opposed to each other; bringing the first surface and the second surface so as to bring a portion of the first surface and a portion of the second surface into contact with a corresponding radially inner and axially inner surface portion and a corresponding radially inner and axially outer surface portion, respectively, the annular fixing structure generating a first squeezing pressure; inflating the inflatable bladder of the curing mould so as to bring the first and the second surfaces closer together, thus generating a second squeezing pressure in such a way as to shape the radially inner and axially inner surface portions and the radially inner and axially outer surface portions of the annular fixing structure.

主权项

1. A method for controlling a phase of moulding an annular fixing structure of a green tyre, comprising:
introducing said green tyre into a curing mould comprising an inflatable bladder; delimiting at least one portion of said annular fixing structure by using a first and a second surface opposed to each other; bringing said first surface and said second surface toward each other so as to bring a portion of said first surface and a portion of said second surface into contact with a corresponding axially inner surface portion and a corresponding axially outer surface portion, respectively, of said annular fixing structure, thereby generating a first squeezing pressure; inflating said inflatable bladder of said curing mould so as to bring said first surface and said second surface closer together, thereby generating a second squeezing pressure greater than said first squeezing pressure so as to shape said radially inner and axially inner surface portions and radially inner and axially outer surface portions of said annular fixing structure; maintaining said second squeezing pressure for at least 2 minutes; and further inflating said inflatable bladder to a third pressure, wherein said second squeezing pressure is maintained for less than 60 minutes wherein said second squeezing pressure is maintained for less than 60 minutes.