Patent attributes
A molten metal holding furnace for supplying a constant quantity of the molten metal to a casting machine is composed of a holding chamber having a melt supply port, and a pressurization chamber having an upward melt outlet port. The holding chamber and the pressurization chamber are communicated with each other via an openable/closable first melt flow passage. The pressurization chamber is composed of a outlet section at which the melt outlet port is positioned and a pressurization section positioned on one side closer to the holding chamber. The holding chamber and the outlet section are juxtaposed with the pressurization section interposed therebetween, where the first melt flow passage is formed at a hearth of the pressurization section, and an openable/closable second melt flow passage communicating with the outlet section is formed at a hearth of the pressurization section.
