Denso Corporation

Nippondenso Co., Ltd.

Pyrotek Japan Limited

Tounetsu Kabushikikaisha

Shunji Mochizuki

Hiromi Takagi

Sumi Yoshikawa

Tomoyuki Hatano

Takeshi Nagasaka

Yoshikazu Ohno

Masahiko Hoshino

An inline degassing apparatus for removing solid solution gases as well as nonmetallic inclusions from molten metal in a degassing container, to which the molten metal is continuously introduced for degassing operation and from which the degassed molten metal is continuously removed. A rotary diffusing device is arranged in the degassing container for generating bubbles of inert gas diffused into the molten metal, thereby entrapping solid solution gases as well as nonmetallic inclusions into the bubbles, which are then floated and separated. Heaters are provided, which extend, in a cantilever fashion, from a side wall of container at a position adjacent the bottom wall of the container substantially parallel to the bottom wall.

Inline degassing apparatus

A molten metal vessel includes a first chamber for containing molten metal such as molten aluminum therein, a filtration chamber in which impurities contained in the molten metal are removed, and a second chamber for reserving clean molten metal to be supplied to a casting die. The molten metal flows from the first chamber to the second chamber through the filtration chamber. A pair of filters, preferably a pair of cylindrical filters, are disposed in the filtration chamber, so that the impurities contained in the molten metal can be filtered twice. The filters are attached to the bottom of the filtration chamber where molten metal oxides hardly develop, so that the filters are easily replaced with new ones for the maintenance purpose. A rod-shaped heater may be disposed in the cylindrical filters to keep the molten metal temperature in a strictly controlled range. Thus, the impurities are effectively removed from the molten metal through the filters which are easily replaceable.

Molten metal vessel for filtering impurities

A holding furnace apparatus for holding molten metal and a molten metal holding method using the same are provided. The holding furnace includes generally a furnace body defining therein a reservoir chamber in which molten metal is held, an inlet port through which an ingot is supplied, an outlet port through which the molten metal held in the reservoir chamber is drawn outside, and an upper furnace wall defining the reservoir chamber together with the furnace body. The upper furnace wall has an inclined wall surface which is, when the reservoir chamber is filled with the molten metal at a given level, exposed to the molten metal so as to direct impurities contained in the molten metal rising to the surface of the molten metal to the inlet port.

Molten metal holding furnace and method of holding molten metal within

Growing community of inventors

Amagasaki, Japan

Shunji Mochizuki