US1720383A - Ingot and mold for making same - Google Patents

Description

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Patented July 9, 1929.

UNITED STA T Es PATENT OFFICE.

EARL CQ SEITE, OFHMASSILLON, OHIO, ABBIGNOR Tv CENTRAL ALLOY STEEL CORPORA- TION, 0F MASSILLON, OHIO,A CORPORATION OF NEW YORK.

meer AND MOLD :son v:Mantua SAME.

Application tiled December 29, 1924. Serial No. 758,511. .i

lrlht present improvements, relating, asindicated, to the manufacture of ingots, have more particular regard to the casting of steel ingots in molds el special form whereby an ingot possessing various desirable characteristics is produced. @ne object thus sought to be obtained is an ingot that Will cool relative- .ly tyuichly, driving the pipe to the top, With absence oli objectionable surface cracking. Particularly in castingingots of alloy steel it is undesirable to maintain the metal on top molten too long in order to eliminate the pip ing, lor othervvise the alloying ingredients will tend to segregate and the resulting product vvill not be el uniform character in respect to euch ingredients throughout..

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'llo the accomplishment el the foregoing and related ends, said invention, then consists el the mold and product resulting trom its use hereinalter lully described and particularly pointed out in the claims; the annexed drawing and the lollowing description set lorth in detail certain mechanism embodying the invention, such disclosed means com stituting, hovvever, but one el various mechanical lorms in which the principle el the invention may be used.,

ln said annened drawings llfig. l isa top plan vievv el a mold constructed in accordance with my present improvements; and Figs. EZ and 3 are central vertical sections thereol talren at right angles to eachother, the planes oil the sections being ilndicated by lines 2%-2 and 3-3, respectively,

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Wllhe inget mold l illustrated in the alleresaid hgures, in so lar as external features are concerned, resembles the one currently in use, and the saine is true el the general construction ol such mold, which accordingly need ,not be described in detail. lt Will be noted that the mold is provided With a pair el' opposed ears or lugs n whereby it may be engaged by suitable hoisting casting mechanism when it is desired to move the-same about or to stri the saine trein an ingot cast therein; also t at the interior opening 3 in the niold decreases in cross-section graduall trom the lovver to the upper end` el said meldt lil desired,hovvever, such opening may thus decrease in cross-section in the opposite direction, as incertain Well-known types of ingot molds, the leature ol present interest in the design or conptruction el the mold not being limited to either el such two designs.

thereto, as indicated ley tli'e line L-3. The

cross-section, however, is not strictly rectangular, due to the fact that all four oi the inner Walls defining the opening are symmetrically fluted, the flutings d being of shallow convex form in cross-section and extendlng from the betteln to the top of the mold, with the re-entrant angles, formed Where their edges meet, illeted so as to avoid any sharp angularities in the resultant roduct. Furthermore, the dutings l, as s own in Figs. 2 and 3, decrease gradually in Width )from the one end to the other el the mold, 1. e., from the bottom to the top in the case of the particular design of mold selected for the purpose of illustration.

The form el the ingot cast in my improved mold will obviously be the same as that ont the open space therein inst described, it being noted that the ilutings in such ingot will be concave and joined at their edges by rounded projecting corners instead el the couver; utings joined by illeted re-entrant angles at their edges, as in the case oli the interior walls el the mold which defines such spaceg Said ingot, moreover, will be el general oblong shape in cross-section, that is, its section will be thinner on the plane indicated by the line {tf-wd than on the plane indicated by the line 2-2, Fig, l. l thus retain the rapid cooling condition which has been tonnel desirable in the case el the ordinary rectangular ingot, While, due te the lact that the lateral Walls ont my improved ingot are dated in the fashion just described, the surlace detects that'tend to occur in the ordinary rectangular ingot, due to unequal cooling and resultant crashing olE such surface,

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1. An ingct mold, characterized by having the opening therein' of general oblong form in cross-section, with vall of the walls defining such opening longitudinallyfluted in a similar manner, with the flutes forming the main portion of the sides of the opening of greater width than the other flutes, substantially as described.

2. -An ingot mold, characterized by having the opening therein of general oblong form in cross-section, with all ofthe walls defining such 4opening symmetrically uted, the flut ings all being of shallow convex form and extending from the bottom to the top of the mold, and the re-entrant angles where the lfour primary side walls at least two of which have a convex contour and four widened corners each provlded with three curved sallents intervenmg between the widened corners and the adjacent primary sidewalls of the mold,

Substantially as described.

' v5. A primary mold having a chamber provided with four primary convex side walls and four widened corners each provided with three curved salients intervening between the widened corners and theiadjacent primary side walls of the mold, substantially as described.

6. A mold the lower portion of which absorbs heat from the in ot more rapidly than the u per portion and avin a chamber pro'- vide with four primary sid two of which have a convex contour and four widened corners each provided with three curved salients intervening between the widened corners and the adjacent primary side walls of themold, substantially as described.

7. A mold having a chamber provided with four primary convex side walls and four broadened corners', each corner comprising a plurality of iutings of shallow convex form, substantiall as described.

8. A mol having a chamber provided with four primary convex side walls andl four broadened corners, each corner comprising Va pluralit of iiutin s of shallow convex form, sai lutin s eing connected with curved salients, su stantially as described.

9. A mold having a chamber provided with four primary side walls at least two of which have a convex contour and four widened corners, each of said widened corners comprising adjacent convex shallow flutings connected b curved salients, substantially as describe y 10. A mold .having a chamber provided with four primary convex side walls and four broadened corners, each corner comprising a pair of flutings of convex contour projecting inwardly toward the center of the mold cavity in amanner similar to the four primary side walls, said ilutings being connected with curved salients substantially as described.

Signed by me, this 22nd day of April, 1922.

EARL C. SMITH.

c walls at least ave

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