Arrangement for low-pressure casting of refractory metals

Arrangement for a low-pressure casting of refractory metals, which has

• a furnace chamber with one or a plurality of gas supply (6) and gas outlet (7) openings, and a riser pipe (8) through a cover (5) of the furnace chamber, onto which a casting mould (9) can be positioned,
• a melting container (3, 12) for the refractory metals, arranged in the furnace chamber, and
• a heating device for heating the refractory metals in the melting container (3, 12), wherein
• the melting container (3, 12) is designed as an exchangeable insert for a receiving mould (2), which supports the melting container (3, 12) and is arranged in the furnace chamber, and a thermally insulating layer (4, 17) is formed between the receiving mould (2) and the melting container (3, 12), or is integrated into the melting container (3, 12);
• wherein the melting container (3, 12) is formed from an inner casing (3) of a ceramic or another heat-resistant material, an outer casing (12) of a ceramic or another heat-resistant material, and an intermediate fill (4) of a heat-resistant material as said thermally insulating layer (4, 17)
• wherein a receiving opening of the receiving mould (2), and the melting container (3, 12), have a conical shape;
• and
• wherein the outer casing (12) is formed by a plurality of conical rings (15) on a base plate (16).