A casting system.

摘要

A molten metal heating method according to this invention employs a heater (20) comprising: at least one heat evolving substance (22) disposed in contact with a molten metal held in a container (1) with one surface thereof; and an electrode (21) disposed in contact with the other surface of the heat evolving substance (22) but not in contact with the molten metal. With this arrangement, a voltage is applied between the electrode (21) and the molten metal to flow an electric current in the heat evolving substance (22) in thicknesswise thereof and causes the heat evolving substance (22) to evolve heat to heat the heater (20) at a high temperature. Thus, the heater (20) heats the molten metal, and controls the temperature of the molten metal. As a whole, this invention improves the quality of metal products. In particular, the heater (20) is less likely to be broken by the heat confinement in it, and can be made of a wide variety of materials.