Heating device for transfer of liquid metal and process for manufacturing the device
AssigneeSeva
InventorsJean-Louis Comarteau, Daniel Boudot, Alain Remy, Patrice Nykiel
Life of this patent
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Abstract
A heating assembly 1 for transferring liquid metal 28 has a closed cross-section and includes a refractory tube 4 wrapped in an insulating layer 5 which is in turn surrounded by an inductor 3 enclosed in refractory concrete within a metal shell, the insulating layer 5 consisting of an insulating refractory concrete layer 5a. The heating assembly 1 may be used in a liquid metal holding furnace 9 provided with a supply of pressurised gas Pr for producing metal parts.
Claims9
A process for the manufacture of a heating device (1) used for the transfer of liquid metal (28), said device having a closed transverse section and opening at one end into an outlet orifice (2) for feeding at least one mold (27) and comprising over its entire length at least one heating apparatus comprising an inductor coil (3) through whose turns an alternating electric current flows, said process including at least the following steps:
- a) forming an assembly comprising a thermal insulation covering (5) surrounding a refractory tube (4),
- b) coiling an inductor (3) around and in contact with the assembly (5),
- c) centering the assembly (5) surrounded by the inductor (3) in a metal jacket (6),
- d) filling the space between the inductor (3) and the metal jacket (6) with refractory concrete (7) poured while generating vibrations thereon, and
- e) after hardening of the concrete (7), baking the heating device (1) for transfer of the metal (28).
Dependencies are inferred from the claim text.