Honda Motor Co., Ltd.

Ryo Onishi

Satoru Kimura

Kenji Yuki

Nobuo Kawauchi

Toshihide Sunada

Gaku Kazama

Provided is a casting mold with which it is possible to apply air-blow to a bottom part of a groove in a core without moving forward/backward the core relative to the mold body. This casting mold is provided with a first mold and a second mold for forming, between the first mold and the second mold, a cavity used to produce a cast article, wherein the second mold has a second mold body and a core, which protrudes from the second mold body in a first direction toward the first mold and is used to forms a hollow part in the cast article, the core is provided with a groove part that opens in the first direction and is recessed in a second direction opposite from the first direction, and the second mold is provided with an air supply flow passage for supplying air for blowing toward a bottom part of the groove part.

Casting mold

A decompression path conductance factor calculation deviceobtains a cavity pressure change characteristic representing a pressure change characteristic of a cavity portionfrom an exhaust speed of a decompression device, a cavity conductance factor, an overflow conductance factor, a decompression path conductance factor, and respective volumes of inside spaces of a cavity portion, an overflow portion, and a decompression path, obtains a decompression path pressure change characteristic representing a pressure change characteristic of the decompression pathfrom the exhaust speed of the decompression device, the volume of the inside space of the decompression path, and the decompression path conductance factor, and obtains the decompression path conductance factor such that a difference between respective approximate curves representing the obtained cavity pressure change characteristic and the obtained decompression path pressure change characteristic becomes a threshold value or less.

Casting mold for die casting, and method for setting decompression path conductance thereof

A casting mold is provided with a cavity portion and an overflow portion, and the overflow portion is connected to a gas flow path (suction path). A valve (an on-off valve, a shut-off valve) is provided between the gas flow path and the overflow portion. A heating method for a casting mold includes a step of setting the pressure in the cavity portion to a second pressure by sucking gas in the overflow portion and in the cavity portion while the valve is kept open for a second time period shorter than a first time period during casting. The heating method further includes a step of heating the casting mold by supplying molten metal into the cavity portion set at the second pressure, and solidifying the molten metal.

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Tokyo, Japan

Ryo Onishi