Method and apparatus for the production of nodular or compacted

Details Method and apparatus for the production of nodular or compacted Method and apparatus for the production of nodular or compacted

1992-05-07

1993-01-12

Rosenberg, Peter D.

Alloys or metallic compositions

Ferrous

1.7 percent or more carbon containing

164271, B22D 2300

Patent

active

051788268

ABSTRACT:
A method for producing nodular or compacted graphite iron castings in a mould having a sprue, an ingate and a mould cavity, having a first part below and a second part above the level of the ingate, comprises delivering particulate magnesium-containing and silicon-containing treatment agent from a dispenser into a stream of molten metal entering the sprue such that the treatment agent is added at a constant rate of addition while the first part of the mould cavity is filled with iron, and at a decreasing rate while the second part is filled. The addition of the treatment agent is controlled by means of apparatus comprising a container, a measuring and data capture device connected via signal transforming means to a control means, conveyor means located below the container and connected to the signal transforming means, and means for injecting the particulate treatment agent into the metal stream.

REFERENCES:
patent: 3765876 (1973-10-01), Moore
patent: 3870512 (1975-03-01), Lee
patent: 3965962 (1976-06-01), Tanaka
patent: 4134757 (1979-01-01), Roberts
patent: 4210195 (1980-07-01), McPherson
patent: 4337816 (1982-07-01), Kaku
patent: 4396428 (1983-08-01), Linebarger

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