| 摘要 |
Vent valve for venting bores of vulcanization moulds, especially for the tread profile area, consisting of a valve sleeve (5), in which a valve insert (4) and a wound spring (6) are movably located, wherein the valve insert (4) consists of a valve shank (4-3), which is at one end equipped with a disk (4-1) and at the other end with a conical surface (4-2) changing into backwards oriented conical end, and the movement of the valve insert (4) is controlled by a delimiter of opening the valve. Inner surface of the valve sleeve (5) is in its part (5-4) located further away from disk (4-1) provided with conical surface (5-2), oriented away from the disk (4-1), and the delimiter of opening the valve is formed by two mutually cooperating conical surfaces (4-2, 5-2) or parts of conical surfaces (4-2, 5-2), wherein the conical surface (4-2) formed at the end of the valve shank (4-3) of the valve insert (4) is oriented against the conical surface (5-2) or part of conical surface (5-2) of the valve sleeve (5). |
