Abstract: The invention relates to an assembly for automatic aligning of rails, comprising: —a first alignment system (10) suitable for placing on a first track element (70) on a first rail (100); —a second alignment system (20) suitable for placing on a second track element (70) on a second rail (200); and —a system for acquiring a position (30), comprising at least one position sensor, wherein the first alignment system (10) and/or the second alignment system (20) comprises an actuating system (51, 52) suitable for automatically adjusting a position of the first rail (100) and/or of the second rail (200) on the basis of a position measured by the acquisition system (30).

Abstract: A moulding assembly for aluminothermic welding of metal rails includes at least one mould part configured to come into contact with at least one other mould part and rails to be welded to form a mould cavity in which the ends of the metal rails to be welded are arranged and into which a molten metal is cast to weld the metal rails, wherein each mould part comprises includes a seating configured to be placed in contact least one of the rails, the seating including a groove into which a sealing product made of intumescent material is applied.

Abstract: The present invention relates to a moulding assembly for aluminothermic welding of metal rails (30), comprising at least one mould part (1, 50) configured to come into contact with at least one other mould part (1, 50) and rails (30) to be welded in order to form a mould cavity (102) in which the ends (31) of the metal rails to be welded are arranged and into which a molten metal is cast in order to weld the metal rails (30), the moulding assembly being characterised in that each mould part (1, 50) comprises a seating (13) configured to be placed in contact with at least one of said rails (30), said seating (13) comprising a groove (60) into which a sealing product (40) made of intumescent material is applied.