Method and device for the aluminothermic welding of rails

A mould for the aluminothermic welding of rails, configured to fit over two rail ends so as to form a moulding cavity, the mould comprising;

• a filling orifice for receiving a molten metal from a crucible,
• at least one mould-filling pipe offset from the filling orifice and configured to receive said molten metal from said filling orifice, said at least one pipe extending into the moulding cavity in a region of a foot of the rail,
• a secondary crucible arranged above the region of a rail head and below the filling orifice configured to be fed with molten metal from the moulding cavity via a secondary channel coupled to the moulding cavity and the secondary crucible.

A device for the aluminothermic welding of rails, comprising

• a first crucible configured to contain a first aluminothermic charge,
• a mould configured to fit over rail ends so as to form a moulding cavity, comprising a filling orifice for receiving molten metal from the first crucible, the mould comprising a secondary crucible arranged above a region of a rail head and below the filling orifice so as to be fed with molten metal from the moulding cavity via a secondary channel coupled to the moulding cavity and the secondary crucible, and
• wherein the first crucible is configured to be placed on said mould.