| 摘要 |
<p>Provided is a degassing device in which a closure valve can be reliably closed even if an injection rate decreases right before molten-metal filling is completed. A molten metal (M) flows from a cavity (C) into an evacuation passage (1), a detection unit (2) disposed part of the way down said evacuation passage (1) detects when the leading edge of the molten metal (M) has reached said detection unit (2), and the closure valve (3) is closed on the basis of an output signal from the detection unit (2). The evacuation passage (1) is thus closed by the closure valve (3) before the leading edge of the molten metal (M) reaches the closure valve (3) via the evacuation passage (1), regardless of the rate at which the molten metal (M) is injected into the cavity (C). As such, the molten metal (M) does not reach an evacuation port (4) downstream of the closure valve (3).</p> |
