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US 11,332,891 B2Granted
Mold for aluminothermie welding of a metal rail and repair method making use thereof
AssigneePandrol Limited
InventorsPierre Bordery, Frédéric Delcroix
Life of this patent
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AssigneePandrol Limited
InventorsPierre Bordery, Frédéric Delcroix
Estimating the term…
The present invention relates in particular to a mold (M) for aluminothermic welding of a metal rail (1), which comprises at least two substantially identical pieces or shells (4), configured to be temporarily assembled opposite one another and on either side of said rail (1) to enclose the head (10), web (11) and foot (12) of this rail (1), each piece or shell (4) having an upper opening (43), which opens onto an internal cavity (44) bounded by walls (45, 46, 48) configured to enclose the head (10), the web (11) and the foot (12) of said rail (1), characterized by the fact that said internal cavity (44) comprises a compressible sealing coating (5) only against the walls (451, 46, 48) configured to enclose said web (11), foot (12) and underside of the head (10), with the exception of the rest of the head (10) and the underside of the foot (12).
A mold for repairing a head of a metal rail by aluminothermic welding, the mold comprising at least two substantially identical pieces or shells, configured to be temporarily assembled opposite one another and on either side of said rail to enclose the head, web and foot of the rail, each piece or shell having an upper opening, which opens onto an internal cavity bounded by walls configured to enclose the head, the web and the foot of said rail, wherein said internal cavity comprises a compressible sealing coating only against the walls configured to enclose said web, foot and underside of the head, the rest of the head and the underside of the foot being devoid of any compressible sealing coating.
Dependencies are inferred from the claim text.