| 摘要 |
<p>The present invention relates to an apparatus (1) and a process for vulcanisation and moulding of tyres. The apparatus (1) comprises containment walls (4a, 10) defining an inner surface (11) delimiting a moulding cavity (3). The shape of the inner surface (11) matches the final conformation to be given to the vulcanised tyre (2) and comprises a plurality of venting devices (13). At least one of the venting devices (13) comprises a bush (14) firmly fitted in a through hole (15) in one of the containment walls (4a, 10). The bush (14) has a vent channel (17) with a first end (18) opening into the moulding cavity (3) and a second end (19) in fluid communication with an environment external to the moulding cavity (3). The vent channel (17) has a tapered segment (20) between the first end (18) and second end (19) which is designed to stop and/or slow down the elastomeric material flow tending to advance in the channel (17) itself together with the evacuated air, so as to limit the length of the excrescences or peduncles being formed on the vulcanised tyre.</p> |
