| 摘要 |
Casting equipment for continuous or semi-continuous water casting of metals, in particular casting of billets or ingots of aluminium, comprising a mould cavity (4) with an inlet (2) that is upwardly open, and an intermediate, inwardly facing and heat insulated overhang or hot-top (8), and an outlet comprising a vertically movable supporting device (5), together with means (10) for the supply of water to cool the melted metal. The wall in the mould cavity is wholly or partly constituted by a permeable material, whereby oil and/or gas are supplied through the permeable material to form an oil- and/or gas layer between the metal and the wall of the mould preventing the metal to come into direct contact with the wall of the mould. The oil and the gas are supplied separately through two independent, and by means of a sealing element (14) or the like, physically separated rings or wall elements (12, 13), whereby the upper wall element (12) for the supply of oil is arranged above the area where the freezing front of the metal is located, while the lower wall element for the supply of gas is arranged directly vis-a-vis to the freezing front (19) of the metal (11) and extends from the lower part of the mould cavity and beyond the contact point between the metal and the mould wall.
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