US1658350A - Closed-bottom ingot mold - Google Patents

Description

Feb. 7, 1928. 1,658,350

J. E. PERRY CLOSED BOTTOM INGOT MOLD Filed May 27, 1925 Patented Feb. 7,

.UNITED "STATES. PATENT OFFICE. 1

JOHN EDMUND PERRY, OF SHARON, PENNSYLVANIA, ASBIGNOB TO VALLEY MOUID &

IRON CORPORATION, OF SEARPSVILLE, PENNSYLVANIA, A'C'ORPOBATION YORK.

CLOSED-BOTTOM imeo'r mom).

Application and Kay 27, less. Serial No. sales.

The present invention relates broadly to metallurgy andmore especially to -aclosed bottom ingot mold provided with cast chilled supporting surfaces upon the-bob I 5 tom of the mold.

of the flask," This letta'wery uneven surface on the part which subsequently became the bottom of the ingot mold and; it was .necessary to cast the ingot mold cons derably machining, to cut aWay'the ki'sh and :spon metal'a'nd provide a smooth surface-for t e bottom portion of the ingot mold when in] use so that it could be properly seated on a i suitable stool.

- The present invention overcomes the difficulties of thdkIlOWIl art without ad ding any undesirable features andcomprises a closed bottom in ct mold i i-:which the .25 necessity for 51118.0 ining 'is entirelyobvi- Med and in which the extra. metal heretofore, used in casting has been; eliminated;

prises a closed bottom ingot mold having a ao-iportion of the bottom surf a'ce zchilledv to comprise. a su portinggsurfacez- Y Other '0 jec ts and'desiderataj'of the resent invention will in part obvious an will in part, be pointed out hereinafter in the specification following 'by/reference to the accompanying. drawings in which like 'charl actors are used. to represent *liitei- -parts throughout" the several 'figures-ithei feof. rThe disclosure herewith is intended to :be

40 illustrative "of a preferred formo fs the invention but it is realized that the invention may be embodied in constructions other than those herein specifically disclosed and there-- .fore the disclosure herewith isto be understood as illustrative and notein the limiting sense. t

Figure 1 is a sectional view of one form of flask, etc.,' for carrying out the present top plates.

' Figure 4 is an elevation of one of said I .chill top plates.

I which extends a roughening un'chilled r- 5 'tion 20. Thesmooth supporting sur aces T longer than" the length desiredg zifor thef. l5. finished ingot mold" inorder to allow for are adapted to set on alsuitable casting stool 23 which is'prov1'ded with edges 17 and 18 upon whichthe smooth surfaces 15 are adapted to rest whenthe. mold-is set up for;

casting. The sides of the mold adjacent the lower portion thereof are provided with staples 12 adapted for use. in handling. a mold and the top of the'm'old carries a hot top 25: which-may be utilized to preserve order to provide an opening for stripping 0 One object of the presentin'vention com-.

one method by which themold can be ma 1e.

This method comprises setting up a sand flask 2 on a casting bottom 1 with the sand r 4 around a suitable core 5 of the shape to iorm=theinterior of the ingot. mold to be cast. This core- 5 preferably carries w an extens on 6 which forms an opening in I the bottom of the ingot mold 22- when the casting op'erationis finished. Chill plates? centered by dowels 8' are held in position on the'flask by O-clamps '9; The chill plates 1' pr'eferabl terminate in bevelled edges 10.

A suitab e g ate'll is also provided insu'ch-y manner that the flask'inay be bottom poured. as is well known -inthe'art. The staples 12 are set in the sand walls in. such manner as W f to be castsolidlyinto the ingot. mold.

, The bottom wing of" the set up d il scribed causes t e metal to rise between the chill plates 7 so that the kish, impurities and f spongy metal may be raked '05 the topwhen the flask is filled.

' ation has chilled supporting surfaces cast on the bottom thereof and with the rough portion 20 on the bottom of the mold between the smooth surfaces adapted to extend into the trough 19 of the casting bottom 23 so that the rough portion does not in any way interfere with the eflicient operation of the mold. The mold having chilled sup.- p'orting surfaces is adapted to withstand hard usage and is less liable to crack during use because of the chilled metal which supports the adjoining metal in the side walls at the bottom of the mold in which the curved portion of the matrix isflocated.

The bevelled edges 10 on the chill plates 7 produce downwardly inclined finished bevelled edges on the bottom of the mold.

These bevelled edges on the bottom of the.

mold cooperate with complemental bevelled edgeson the supporting base 23 to automatically and accurately guide the mold into position on this base or stool, when the mold is lowered in place by a suitable crane to permit the surfaces 15 on the bottom of the mold to cooperate with the rails or edges 17 and 18 on the base 23.

topped rails 17 and 18 which are adapted to form the supporting members for the mold. Bevelled faces extend downwardly and inwardly from the top of the rails 17 and 18 and lead to a valley or trough 19 of sufficient depthto accommodate the rough portion 20 on'the bottom of the mold. Preferably, a clearance opening 21 is provided in this valley portion 19. to accommodate a mold "plug 24 such as is commonly used with molds of this type. The construction of the bevelled edges on the bottom of. the

mold and on the stool is of considerable-importance. These molds are veryheavy and are handled by cranes, andin lowering a mold in place on its stool, it is essential "that the mold shall be guided into position to stand firmly onthe stool and therefore;

the part 20 on the mold actsto insure this relation. Where extension 20 has substantigltllyistraight sides,'or the stool is without gxgti ing means, there is danger of the mold being lowered with one of the corners of the rough extension restingon the straight side of the stool. This'situation may not be i'observed until the supporting chains from thecrane have been substantially relieved from strain, at which time the mold is liable to drop suddenly into position with avery heavy impact, which may either crack off a portion of the mold or stool, or Worse 'still may seriously injure a workman. The

inclined interlock in this present invention between the bottom of the mold and-the mold supporting base avoids this difficulty,

' in that the small end of the mold is easily guided between the trough rails and by got mold having cast finished supporting surfaces arranged on each side of the bottom thereof, a depending portion between the said surfaces, inclined surfaces on the Sides of said depending portion, and supporting base comprising an open trough of a depth greater than the length of the depending portion of said ingot mold, the inner sides. of said trough being inclined and the construction and arrangement being such when said mold is seated on said supporting base the said mold rests entirely upon said supporting cast finished surface with the central portion of said mold out of contact withsaid supporting base.

2. As an article of manufacture, a supporting base'for closed bottom ingot molds, said supporting base comprising a pair of parallel. supporting edges with a. deep This mold base or -stool 28 comprises flattrough-like depression extending between said supporting edges and adapted to be out of contact with the bottom of an ingot mold to permit said supporting edges to support the mold.

3. As an article .of manufacture, a sup porting base for closed. bottom ingot molds,

said supporting base comprising a pair of parallel supporting edges with a trough-like depression extending between said support ing edges, and a recess in said trough to proopeningleadi'ng from the bottom of the matrix, a-plug closing saidopening and extending below the-bottom of the mold, "a trough-like supporting I member comprising a trough-like structure provided with sup porting rails adapted to cooperate with the surfaces at the bottom of the-mold to support said mold vertically, said-* tfioiigh-like supporting member being provided with an opening into which said plug extends, and a depending portion on the bottom: of said mold adapted to guide said mold into position between said supporting'rails.

5. A supporting member for closed bottom ingot molds comprising a trough-like 'mem ber with supporting rails on each side of the trough, and with a recess in the trough between said rails, said recess being adapted to accommodate a plug extending below the bottom of an ingot mold setting upon said support.

- JOHN EDMUND PERRY.

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