| 摘要 |
A method for casting parts of fused ceramic material, from a bath of oxides maintained in the liquid state in a furnace and permanently covered by a layer of powdery batch material are disclosed. The method comprises the following steps: (a) connecting the mold internal cavity, through its lower part, to a downwardly directed feed duct, (b) dipping the lower end of said duct in the liquid bath, (c) establishing in the mold a vacuum causing the bath liquid to rise in the duct and in the mold, (d) allowing the product to solidify in the duct; (e) lifting the mold, together with the duct, and transporting the same apart from the furnace, (f) allowing complete solidification of the product in the mold. Preferably material is removed on a limited area of the bath surface by being swept away with a downwardly directed gas jet, for instance flowing through the feed duct is then lowered through this area free of powdery material into said liquid bath.
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