| 摘要 |
1495528 Repairing ingot moulds; welding by fusion; thermo - aluminic reaction processes HILTI AG 16 May 1975 [18 June 1974] 26874/74 Headings B3R B3V and B3F The opening 12 in the top 11 of a bottle top mould 10 is repaired, to take the mould plug, by forming or attaching a ring 44, Fig. 5, or a ring 30, Fig. 4, on the mould top 11. In Fig. 4, the ring 30 is secured by welding 32 and 33 around the mouth 12 with its erosion 15. Instead, or as well, the ring may have through-holes through which fasteners are driven into the top wall 11 by an explosivepowered driving tool. In Fig. 5, a refractory mould in two ring parts 40, 41, which may be formed from a number of sections, is arranged around the opening 12 and outer ring 40 has a slag flow-off notch. An alumino thermic mixture is then ignited in a crucible above the mould and the resulting molten metal is poured into the preheated refractory mould 40, 41. A prefabricated ring may be welded in place on the mould 10 by a similar method. |
