Patent ID: 6929052

Claim:
A method for uphill/low pressure casting a liquid melt in a device which comprises a casting furnace lying below a casting table, the casting furnace having a riser pipe with a mouth opening, a mould having an underlying pouring-in hole, and a displaceable slide valve closure having a displaceable overlying opening section and a displaceable underlying opening section, said slide valve closure, when inserted between said casting furnace and said casting table, forming a flow-through channel comprising a substantially straight, longitudinal course during casting of the liquid melt, the flow-through channel being formed from the overlying opening section and the underlying opening section which are directly adjacent to one another, said method comprising: casting the liquid melt in the pouring-in hole of the mould; shutting off the slide valve closure; displacing the overlying and underlying opening sections of the flow through channel with respect to one another and transversely to the longitudinal course of the flow-through channel directly after casting the liquid melt in the pouring-in hole of the mould, so that the overlying opening section remains in open communication with the pouring-in hole of the mould and the underlying opening section remains in open communication with the mouth opening of the riser, and the overlying and underlying sections are completely offset with respect to one another; and actively cooling the liquid melt located inside the overlying opening section of the flow-through channel beginning at the latest from the time the two opening sections of the flow-through channel are displaced with respect to one another.