Method and apparatus for venting a diecasting mould of a...

Details Method and apparatus for venting a diecasting mould of a... Method and apparatus for venting a diecasting mould of a...

B - Operations, Transporting

22

D

B22D 17/22 (2006.01) B22D 17/14 (2006.01)

Patent

CA 2262193

In order to vent a diecasting mould of a diecasting machine, it is proposed that the mould 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 mould 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 mould cavity to the venting channel. The second venting valve is operated by separate independent means and is closed before the mould 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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