Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1974-08-09
1976-05-25
Shore, Ronald J.
Metal founding
Process
Shaping liquid metal against a forming surface
249174, B22D 700
Patent
active
039586200
ABSTRACT:
Blank metal ingots particularly steel of uniform weight per piece and cross section are formed with a mold which is made up of a plurality of superposed vertical sections which together define an interior mold cavity of uniform cross section over its total height. The steel which is produced in a known steel making method is first tapped into a casting ladle which is provided with a refractory lining. A plurality of mold sections are built up one after the other over a casting plate and the steel is directed upwardly through a bottom opening on the plate into the mold cavity and as soon as the mold is completely filled the slide plate is closed. For casting ingots of round or polygonal cross section with diameters of 200 to 350 millimeters the steel is bottom poured into the mold cavity at a rate of rise of from 30 to 80 centimeters per minute and the surface of the melt is not covered but is maintained as cold as possible. The inflow to the mold cavity is exactly centered and for ingots of diameters of larger than 300 millimeters the mold is covered with a heat insulating powder and the rate of rise is maintained between 10 to 30 centimeters per minute. A mold is constructed of carbon-rich iron and in particular a hematite whose inner cross section is constant over its total length and which is divided in axial direction into several sections, with the total length of the mold being greater than 2 meters and having a clearance less than 250 millimeters. The mold is characterized by the fact that its weight is at least 1.3 times the weight of the ingot which is formed.
REFERENCES:
patent: 390809 (1888-10-01), Singer
patent: 1583248 (1926-05-01), Durville
patent: 2937424 (1960-05-01), Guenzi
patent: 3191292 (1965-06-01), Strom
patent: 3274681 (1966-09-01), Lohman
Reuter Guido
Robertz Hans
Hampilos Gus T.
Rheinstahl Giesserei A.G.
Shore Ronald J.
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