Two-chamber type low pressure casting melt holding furnace

摘要

The present invention relates to a two-chamber type low pressure casting molten metal holding furnace for producing a casting product such as an aluminum alloy by a low pressure casting method, and pressurization is performed when a pressurized gas enters into a material constituting a molten metal storage container. The object is to prevent the release of gas into the melt and the generation of bubbles. The portion of the pressurizing chamber 22 excluding the pressurizing pipe 48 and the hot water outlet pipe 50 is open to the atmosphere through a ventilation gap 66 located above the constant hot water surface position L3. The ventilation gap 66 is located above the constant hot water surface position L3. Even if cracks or cracks that have occurred in the pressurization pipe afterwards, even if there is leaching of the pressurized gas into the material constituting the molten metal storage container 12 through the microgap that originally exists in the pressurization pipe, the ventilation gap The leached pressurized gas is released out of the furnace from 66.