LOW-PRESSURE CASTING APPARATUS AND LOW-PRESSURE CASTING METHOD USING THE SAME

摘要

Provided is a low-pressure casting apparatus for stable casting without using feedback control even if a furnace body has a crack, and a low-pressure casting method using the same. A low-pressure casting apparatus fills a cavity with molten metal M through a guiding unit by introducing gas into a holding furnace for heating the molten metal M to apply pressure to a surface of the molten metal M. The holding furnace includes a casing, a furnace body accommodated in the casing, and a refractory layer disposed between the casing and the furnace body, the refractory layer having a pore structure. The low-pressure casting apparatus further includes a first gas supply unit for supplying to the furnace body the gas to apply pressure to the molten metal M and a second gas supply unit for supplying gas to the refractory layer.

主权项

1. A low-pressure casting apparatus comprising:
a casting die having inside a cavity shaped to conform to an outer shape of a casting; a holding furnace provided below the casting die which heats and holds molten metal; and a guiding unit which guides the molten metal inside the holding furnace into the cavity, the low-pressure casting apparatus which fills the cavity with the molten metal through the guiding unit by introducing gas into the holding furnace to apply pressure to a surface of the molten metal, wherein the holding furnace includes a metal casing, a furnace body accommodated in the metal casing, and a refractory layer disposed between the metal casing and the furnace body, the refractory layer having a pore structure, and the low-pressure casting apparatus is provided with a first gas supply unit which supplies to the furnace body the gas to apply pressure to the molten metal and a second gas supply unit which supplies gas to the refractory layer.