| 摘要 |
An air venting valve for removing air from a vulcanising mould of a vehicle tyre and method for removing air from a vulcanising mould of a vehicle tyre by the aid of air venting valve, in which air venting valve there is a body (2) functioning as an air channel and an inner part (3) moving in its longitudinal direction which body comprises a stem (4), an outer diameter of which is smaller than an inner diameter of the body, and a valve disc (5) at an inner end of the stem on the side of a mould surface, a diameter of which valve disc is larger than the inner diameter of the body, which valve disc supports itself in a closing position of the air venting valve on a stop surface of the body and is in an open position at a clearance from said stop surface, and in which a spring member has been arranged in the air venting valve for forcing the inner part in a predetermined position, particularly for opening the valve to the open position when a blank is removed from the vulcanising mould, and the body is substantially cylindrical of its outer surface, and in the lower part of the inner part is arranged an outer thread and in the lower part of the body a respective inner thread so that the inner part of the valve is installable by screwing the valve stem in the body.
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