| 摘要 |
The invention concerns a new process and mould assembly for use in aluminothermic intercast welding of rail ends to form substantially continuous railway tracks, the process comprises the steps of aligning the to-be-welded rails (6) so as to define an inter-rail gap between the rail ends (6); providing a mould assembly comprising two upright side moulds (12) that are fitted on either side of the inter-rail gap, each side mould (12) including at least one elongate, open-ended down gate (18) extending between a top part and a bottom part of the side mould (12) and terminating in a down gate well; a base mould (14) adapted for receiving the rail ends (6) and for supporting the side moulds (12) on either side of the inter-rail gap; the arrangement being such that the base mould(14) and side moulds (12) cooperate to define an enclosed mould cavity for receiving molten weld material; and receiving means (16) for receiving molten weld material in at least one of the side moulds (12) and arranged in flow communication with the down gate (18); and side-pouring molten weld material into the receiving means (16) such that the molten weld material is transported from the receiving means (16), down the down gate (18) of the side mould (12) and into the base mould (14) to form a rail foot, from where the molten weld material rises into the inter-rail gap to form the web and rail head of the rail weld. |
