Method and apparatus for venting a diecasting mould of a diecasing machine
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United States of America Patent
Stats
-
Oct 9, 2001
Grant Date -
N/A
app pub date -
Feb 9, 1999
filing date -
Feb 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to vent a diecasting mold of a diecasting machine, it is proposed that the mold cavity and/or the pressure chamber are vented during the filling operation by a second venting valve, additionally to a first venting valve. The first venting valve is located in a venting channel portion that communicates with a venting channel leading out of the mold cavity. For operating the first venting valve, an impact transmitter is provided that is operationally connected to the first venting valve and that is exposed to and moved by the casting material advancing from the mold cavity to the venting channel. The second venting valve is operated by separate independent means and is closed before the mold cavity is completely filled. As a criterion for closing the second venting valve, the length of the path can be used along which the casting piston runs during the filling operation.
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