Heating method for casting mold, and casting device
AssigneeHonda Motor Co., Ltd.
InventorsKenji Yuki, Ryo Onishi, Satoru Kimura
Life of this patent
Estimating the term…
Abstract
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.
Claims10
A method for a casting mold for heating the casting mold before casting is performed, wherein
- the casting mold includes, on an inside thereof, a cavity portion, and an overflow portion connected to the cavity portion,
- the overflow portion is connected to a gas flow path provided inside or outside the casting mold,
- a valve is provided between the gas flow path and the overflow portion, and wherein
- the method comprising:
- a first suction step of setting a pressure in the gas flow path to a predetermined pressure in a state in which the valve is closed;
- a second suction step of setting the pressure in the cavity portion to a first pressure by sucking the gas in the overflow portion and in the cavity portion through the gas flow path set at the predetermined pressure while keeping the valve open for a first time period shorter than a second time period;
- a step of supplying molten metal into the cavity portion set at the first pressure and solidifying the molten metal to heat the casting mold;
- and
- a step of taking out, as a test article, a cast article obtained by solidifying the molten metal,
- a step of performing the casting comprises:
- a third suction step of setting the pressure in the gas flow path to the predetermined pressure by sucking gas in the gas flow path in the state in which the valve is closed;
- a fourth suction step of setting a pressure in the cavity portion to a second pressure by sucking gas in the overflow portion and in the cavity portion through the gas flow path set at the predetermined pressure while keeping the valve open for the second time period;
- a step of supplying the molten metal into the cavity portion set at the second pressure, and solidifying the molten metal;
- and
- a step of taking out, as a product, a cast article obtained by solidifying the molten metal.
A casting device that heats a casting mold before casting is performed,
- the casting mold including, on an inside thereof, a cavity portion, and an overflow portion connected to the cavity portion,
- the casting device comprising:
- a gas suction unit configured to suck gas in the overflow portion and in the cavity portion through a gas flow path provided inside or outside the casting mold;
- a valve provided between the gas flow path and the overflow portion;
- a molten metal supply unit configured to supply molten metal into the cavity portion;
- and
- a control unit configured to control the valve, the gas suction unit, and the molten metal supply unit, wherein
- during heating, the control unit causes the casting mold to be heated by executing:
- a first suction step of setting a pressure in the gas flow path to a predetermined pressure by controlling the gas suction unit and the valve to cause the gas suction unit to suck the gas in the gas flow path in a state in which the valve is closed;
- a second suction step of setting the pressure in the cavity portion to a first pressure by controlling the gas suction unit and the valve to cause the gas suction unit to suck the gas in the overflow portion and in the cavity portion through the gas flow path set at the predetermined pressure while the valve is kept open for a first time period shorter than a second time period;
- and
- a step of controlling the molten metal supply unit to supply the molten metal into the cavity portion set at the first pressure and solidify the molten metal, and
- during casting, the control unit executes:
- a third suction step of setting a pressure in the gas flow path to the predetermined pressure by controlling the gas suction unit and the valve to cause the gas suction unit to suck gas in the gas flow path in a state in which the valve is closed;
- a fourth suction step of setting the pressure in the cavity portion to a second pressure by controlling the gas suction unit and the valve to cause the gas suction unit to suck gas in the overflow portion and in the cavity portion through the gas flow path set at the predetermined pressure while the valve is kept open for the second time period;
- and
- a step of controlling the molten metal supply unit to supply molten metal into the cavity portion set at the second pressure and solidify the molten metal.
Dependencies are inferred from the claim text.