| 主权项 |
1. A semi-continuous vertical direct chill casting process for manufacturing a rolling slab and/or extrusion billet, in which a separator and two liquid metal supply systems, optionally spouts or troughs or tundishes, arranged on either side of the separator, are used, and wherein said process comprises:
a) One aluminium alloy is cast through a first liquid metal supply system, optionally a spout or trough or tundish, into a semi-continuous vertical casting mould, b) The separator, made of metal and/or a refractory material, is introduced into the mould, in contact with the solidification front, c) A second aluminium alloy is cast into the semi-continuous vertical casting mould, on the other side of the separator, via a second liquid metal supply system, optionally a spout or trough or tundish, d) The separator is raised simultaneously with the end of casting of the alloys, or before the end of casting of the alloys, in which case, the alloys may mix together in a zone in which slab and/or billet casting ended, e) The solidified slab and/or billet is removed from the semi-continuous casting mould,
wherein a vibrator, and/or a vibratory motion is applied to the separator, at least while said separator is in contact with the solidification front, to prevent said separator from becoming trapped and/or entrained by solidified metal. |
