Sprue Structure for Low-Pressure Casting Device and Low-Pressure Casting Device Having Said Sprue
AssigneeNissan Motor Co., Ltd.
InventorsYuta Sugiyama, Carl Schubeler, Giichirou Okamura
Life of this patent
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Abstract
A sprue for a low-pressure casting device includes a stalk connection part to be connected to a stalk, a molten metal reservoir and a cavity connection part to be connected to the cavity. The shape of the molten metal reservoir is such that the perimeter of the cross section perpendicular to the flow direction of molten metal gradually increases toward the cavity connection part while the area of the cross section remains constant.
Claims11
A sprue structure that is used for a low-pressure casting device to communicate a stalk with a cavity of a mold, comprising:
- a stalk connection part configured to be connected to the stalk;
- a molten metal reservoir;
- and a cavity connection part configured to be connected to the cavity,
- wherein the shape of the molten metal reservoir is such that a perimeter of a cross section perpendicular to a flow direction of the molten metal increases toward the cavity connection part while an area of the cross section remains constant.
A low-pressure casting device, comprising:
- a holding furnace configured to hold molten metal;
- a stalk with a lower end configured to be dipped in the molten metal in the holding furnace;
- a sprue communicating the stalk to a cavity of a mold;
- and a pressure controller configured to control a pressure in the holding furnace,
- wherein the sprue comprises:
- a stalk connection part configured to be connected to the stalk;
- a molten metal reservoir;
- and
- a cavity connection part configured to be connected to the cavity, and
- the shape of the molten metal reservoir is such that a perimeter of a cross section perpendicular to a flow direction of the molten metal increases toward the cavity connection part while an area of the cross section remains constant.
Dependencies are inferred from the claim text.