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US 6,805,191 B2Granted
Reduction casting method, reduction casting apparatus and molding die using same
AssigneeNissin Kogyo Co., Ltd.
InventorsKeisuke Ban, Koichi Ogiwara, Akira Sunohara
Life of this patent
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Abstract
A reduction casting method, in which a molten metal is poured into a cavity of a molding die and casting is performed while the oxide film formed on the surface of the molten metal is reduced by allowing the molten metal and the reducing compound to be contacted with each other in the cavity of the molding die, is characterized in that, at the time the molten metal is poured into the cavity, it is done while it is allowed to be in a turbulent flow.
Claims7
A reduction casting apparatus, comprising:
- a sprue;
- a runner positioned adjacent the sprue;
- a removeable stopper positionable between the runner and the sprue to adjust a flow rate of molten metal;
- a feeder head portion having a diameter larger than a flow passage diameter of the runner;
- a gate in fluid communication with the feeder head portion and having a diameter smaller than the diameter of the feeder head portion;
- and
- a molding die adjacent to the gate and having a cavity for receiving the molten metal,
- wherein the gate, the feeder head portion and the runner are arranged so that the molten metal flows in a vertical straight line from the runner to the cavity.
5 more elements
A reduction casting apparatus, comprising:
- a sprue;
- a runner positioned adjacent the sprue;
- a removeable stopper positionable between the runner and the sprue;
- a feeder head portion;
- a gate in fluid communication with the feeder head portion;
- and
- a molding die adjacent to the gate and having a cavity for receiving the molten metal,
- wherein at least the runner, the gate and the feeder head portion are in vertical alignment so that the molten metal flows from the runner to the cavity.
5 more elements
Dependencies are inferred from the claim text.