Patent ID: 6899159

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 opening, and a slide valve closure forming a flow-through channel comprising a substantially straight, longitudinal course during casting of the liquid melt, the flow-through channel being formed from an overlying opening section and an underlying opening section which are directly adjacent to one another, said method comprising: casting the liquid melt into said mould through the pouring-in opening of the mould; shutting off the slide valve closure by displacing the overlying and underlying opening sections of the flow-through channel with respect to one another transversely to the longitudinal course of the flow-through channel directly after casting the liquid melt, which liquid melt is still in the pouring-in opening, so that the overlying opening section remains in open communication with the pouring-in opening of the mould free from undercut, and the underlying opening section remains in open communication with the mouth opening of the riser pipe, and the overlying and underlying opening sections are completely offset with respect to one another; lowering the liquid melt in the riser pipe below the mouth opening of the riser pipe, wherein the underlying opening section of the flow-through channel is emptied of the liquid melt; wherein the mould is placed on the riser pipe so that a defined downward pressure is set between the slide valve closure and the mouth opening of the riser pipe, wherein when the mould is placed on the riser pipe, said mouth opening of the riser pipe is elastically flexible.