Патент USA US2129821код для вставки
Sept. 13, 1938. w. M. CHARMAN 2,129,821 BOTTOM RING FOR HOT TOPS Filed Jan. 28, 1931 f7 27 4 . ‘@3- in 2/6 7560?? \/~F'-4- immwezm 17 1% mag/27L“ ‘Patented Sept. 13, 1938 . i m . UNlTED STATES a amaezi BOTTOM RING ron nor were Walter M. ?lial-man, Cleveland Heights, Ohio Application January 28, 1931, Serial No. 511,733 12 Claims. (Cl. 22-44:?) This invention relates to bottom rings for-hot Other-objects and features of novelty will ap- » tops, and has‘reference particularly to improve» ments in non-?oating hot tops of that class in which metal casings are employed. Such hot 5 tops rest upon the ingot mold during the pouring pear as I proceed with the description of those embodiments of the invention which, for the pur poses of the Present application, I h?Ve.i11i1S trated in the accompanying drawing. in which 5 operation, and may or may not be anchored to the mold. The joint between the casing and the hot top must be relatively tight in order to prevent molten metal from entering it. Consel0 quently part ‘or all of the upper surface of the ingot mold is usually machined, and the lower Figure 1 is a Vertical Sectional View Of a hot ‘top and 8- fl‘algmeht 0f the upper end of an ingot mold in connection with which my invention is em liloyed" Fig. 2 is a similar view with the pad and lining Iii element added for the purpose of truing up these two surfaces , to meet throughout their extent. In spite of 15 these precautions molten metal sometimes finds its way into the joint, solidifies and then tends of the bottom ring. Fig. 4 is a cross sectional view taken substan W111}! 011 the line “4' of Fig- 3, and 15> . Fla 5is a detail elcvational view of a fastening end surface of the hot top is likewise machined, Fig. 3 is a frasmental plan view of one corner to “hang up” the ingot thereby interfering'with whlchtmay be employed for holding the bottom its natural shrinkage during cooling, and serves to weld the two surfaces together_ 20 A portion of the lower end of such a‘casing is ring '60 the casing In the drawing a fragment of an ingot mold is illustrated at it, having a rabbet H with a trued as also necessarily exposed to the molten metals upper Surface formed Preferably by machining poured through the hot top, After a, series of The mold may have a cavity of any desired‘ cross operations this exposed ‘metal is adversely af- ' sectional form; as‘ for instance approximately fected and, in the course of time, becomes pitted - rectangular, approximately round, ?uted Or the ‘.15 and cracked to such an extent that the pro- like- tuberances and ?ns on the ingot resulting from the flow of metal into such inequalities, interfere considerably with the operation of stripping the hot top from the ingot and ?nally make a, 30 new casing necessary. By the use of my invention however the casing proper has an indefinite life, and the part which is to be replaced is relatively small and of relatively low cost. I B150 an inwardly extending upper ledge I4. one of the ‘objects of the invention therefore 35 is the provision in a hot top of the non-?oating type of means for protecting the lower end of the hot top casing, which means shall be remov- The tie!‘ is Supported Wholly 01‘ partially upon the Another object is the provision of securing 40 means for the removable section adapted to fail when subjected to unusual strains such as are exerted in separating the hot top from the mold when these two parts tend‘to stick together on account of the welding action of molten metal 45 above explained, or my stripping the hot top from the ingot when adherence between them becomes strong due to the metal entering the inequalities , 25 inner wall of the casing between these two ledges is covered with a heat insulating lining which, 35 in the Present instance, takes the form Of two tiers of refractory blocks l5 and It. The lower able and replaceable when occasion demands. of the bottom ring, ' The casing of the hot top Shown at '2 15 0f iron 08st ill-One 01‘ a plurality of parts- If the casing 18 not made in One piece its 138-1155 are bolted or otherwise secured together in a more or less permanent fashion. The casing comprises a 30 lowel‘klhwal‘dly extending ledge l3 running Pref embly entirely around the casing, and may have , ledge 13' Here'liofol‘e it has been the practice to machine 4i) the lower end Surface of the hot top casing, 001‘ responding tothe lower surface of ledge 13 of the Present disclosure. and let it rest upon the ma chined surface of the ingot. In accordance with myv invention however the lower end of the 025- as mg Propel‘ may 01' may not be machined, f0!‘ ll; is covered by an auxiliary ledge member I‘! which is interposed between the mold and the casing Still another object of the invention is the pro'12. This auxiliary member extends under the 50 vision of a yieldable pad or gasket between the , ledge i3 and protects the entire lower and inner 50 hot top casing and ingot mold in order to e?ect surfaces thereof. It has an inner rim portion a good seal for this joint, and preferably an exwhich stands ?ush with the upper surface of tension of this pad or gasket inwardly and up- ledge l3, and may assist that ledge in the support wardly to‘constitute a lining for a portion of the of the blocks l5. This inner rim portion also '55 hot top as a protection for the inner wallthereof. stands flush or, nearly ?ush with the inner sur- 66 2 2,129,821 face of lining blocks IS. The ledge member I‘! may be machined on its lower surface, and on account of its relatively small size the machining may be more easily effected than could be the machining of the casing proper. The auxiliary ledge is preferably made as an annulus in a single These fastenings are arranged at intervals throughout the perimeter of the hot top, and in the case of rectangular hot tops they are gener ally placed at the corners, as indicated in Fig. 3. When the auxiliary ledge member H is attached to the casing l2, this assembly constitutes a me tallic casing. Consequently, the term “metallic casing”, as hereinafter used, is/to be considered as_ descriptive either of the casing l2 alone or of piece, but obviously may be constructed of a plu~ rality of pieces if desired. It is detachably mounted upon the casing by suitable means such 10 as willhereinafter be described in connection -. the assembly of that casing with the ring |‘|. with the form of the invention illustrated in So long as a ring |'l, used as disclosed in Fig. 1, Fig. 2. ’ remains relatively new, and particularly if its In the latter ?gure the annular auxiliary ledge inner surface is coated with a suitable parting member I‘! is the same as in Fig. 1, except that compound, the hot top may be stripped from the 15 it is provided with a series‘of holes for the recep mold without any considerable di?iculty. After tion of plugs l8, made preferably of wood. These the metal of this ring has become pitted and plugs are renewed after each heat and are put cracked however, due to repeated contact with in with a driving ?t. After they are in place a molten metal, the stripping of the hot top be non-in?ammable annular gasket and lining mem comes increasingly difficult. The ring should 20 ber I9, made preferably although not necessarily ‘ then be removed and a new one put in its place. in one piece, and formed to ?t snugly, is pushed In the event that such replacement is delayed into place covering the lower end surface of the too long, or in the event that molten metal ?nds ring l1 and extending over its inner surface its way into the joint between the ring and the exposed to the molten metal and up over the joint rabbet ll of the mold, welding these‘two parts 25 between the ring and the blocks |5.> Nails 20 together, it may become practically impossible with large heads are then driven through the to strip the ring |‘| from the ingot. 'The force member 19 into the plugs I8, thereby securing applied to pull‘ the hot top away from the ingot the member Hi to the hot top. when the molten will then cause the wedges 23 to cut through the metal is poured the plugs I8 become charred and metal at the upper ends of pins 2|, and the casing 30 lose their grip upon the nails 20, so that when |2 will then part from the ring ll, carrying the the hot top is stripped from the ingot the mem lining blocks l5 and IS with it. Where the addi ber l9 remains upon the ingot, affording an ’ tional lining member and gasket I9 is employed excellent parting surface. Other means, adapted “ however, the ring ll 'will have a much greater to fail when the not top is stripped from the mold, life and there will seldom be any breaking away 35 may of course be substituted for that described of the ring H from the casing. The member Is without departing from the invention, or the also, of course, possesses the same advantages member I9 may be held in- place by friction whether or not there is a replaceable lower ring alone. . * By the term “non-in?ammable” as herein ap 40 plied to the member I! I intend to include any material which will not burn or which will burn ,with di?iculty, ?brous material being preferred. This material should also be somewhat resilient or yielding so as to form a gasket seal between 45 the ring I‘! and the horizontal surface ofrabbet II, and to this end is shown on the drawing as corrugated board, whereby the hot metal is pre vented from ?owing into this joint, hanging up the ingot, and producing shrinkage cracks therein. ' The ring ll, regardless of whether or not it be‘ covered at each pouring with the combined gas ket and lining member l9, may be attached to " the casing l2 ‘by removable fastenings which are 55 adapted to fail under heavy strains. . This is not‘ so essential in. the form of the invention shown in Fig. 2, as in that shown in Fig. 1, but is always desirable. The means " herein illustrated for securing the ring in this manner is shown and 60 claimed in my copendlng application, Serial No. ‘for the casing. . 15 20 25 80 ' Having thus described my invention, I claim: 1. In combination, a hot top adapted- to rest upon the upper end of an ingot mold, said hot top comprising a metallic casing having a lower ledgefor the support of lining members, a me tallic member covering the lower end~ of the eas ing so as to engage the mold when ‘the hot top is supported thereon, and means for detachably securing said metallic member to said casing. ' 2. In combination, a hot top casing having a lower ledge for the support of lining members, a metallic 1.. ember covering the lower end of the casing having a lower, surface adapted to con 50 form with and to rest upon a trued upper surface of an ingot mold, said metallic member extend ing inwardly beyond the inner casing wall, and means for detachably securing said member to ' 55 _ - said casing. 3. In combination, a-hot top casing having an inwardly extending ledge at the bottom thereof, a renewable metallic member covering the lower and inner surfaces of said ledge, the lower sur- ‘ 511,732,‘ ?led January 28, 1931, and consists of headed pins 2| mounted with their heads down face of said member adapted to conform with and 60 in slots 22 formed in the ring II. The pins 2| are - projected through holes drilled in the ledge IS in mold,,and means for detachably securing-said member to said casing. 4. In a hot top adapted to rest uponthe upper‘ end of an ingot mold, a metallic casing having a 65 65 positions to register with the slots 22, and wedges 23 are then driven through slots in the pins 2| so positioned that the wedges may bear upon the upper surface of the ledge. When an auxili ary ledge is detached from or applied to the cas 70 ing,,the lining blocks or a portion of them are removed, this work’being done preferably with the casing ‘in an inverted position. vCertain of the blocks are chipped away, as indicated at 24, at their lower outer edges in order to make room for the wedges 23 and the upper ends of pins 2|. to rest upon a trued upper surface of an ingot lower inwardly extending ledge, lining elements supported thereupon, and a non-metallic, non! in?ammable yieldable strip covering the lower end surface; of the hot top and extending upwardly for a distance over the inner-surface of said liningelements, the lower portion of said strip being adapted to separate the hot top from the mold and form a seal between them. -5. In a hot topyadapted to rest upon the upper 3 2,129,821 end of an ingot mold, a metallic casing having a lower inwardly extending ledge, lining elements supported thereupon, a renewable metallic mem ber covering the lower and inner surfaces of said ledge, and a non-metallic, non-inflammable, yieldable strip covering the lower surface of. said renewable member and extending upwardly for a distance over the inner surfaces of said lining elements, the lower portion of said strip being 10 adapted to separate the hot top from the mold andform a seal between them. 6. The herein described ingot mold assembly comprising upper and lower ‘ingot mold ele ments matching horizontally to form a continu 15 ous mold cavity a substantial portion of which is within the lower mold element, and a highly compressible sealing layer of cellular ?brous ma-' terial combustible under temperature conditions existing during the teeming of. an ingot lying 20 horizontally between the adjacent surfaces of the lower and upper mold elements. ‘ during the teeming of. an ingot lying horizontally between the lower and upper mold elements. 9. The herein described ingot mold assembly comprising upper and lower mold elements, the lower mold element constituting a support and :1 closure for the upper mold'element, and a highly compressible sealing layer of cellular ?brous ma terial combustible under temperature conditions existing during the teeming of an ingot lying between the adjacent surfaces of the lower and 10 upper ‘mold elements. - 10. The herein described ingot mold assembly comprising an ingot mold divided horizontally into a plurality of ingot mold elements, and a thin sealing layer of corrugated board combus tible under temperature conditions existing during the teeming of an ingot lying horizontally between adjacent faces of the mold elements. 11. The herein described ingot mold assembly comprising an ingot mold divided horizontally 20 into a plurality of ingot mold elements, and a _ highly compressible sealing layer of cellular 7. The herein described ingot mold assembly >?brous material combustible under temperature comprising upper and lower ingot mold elements conditions existing during the teeming of an matching horizontally to form a contlnuousmold ingot. lying horizontally between adjacent sur 25 25 cavity a substantial portion of which is within the lower mold element, and a compressible sealing layer of corrugated board combustible under temperature conditions existing during the I teeming of an ingot lying horizontally between 30 the adjacent surfaces of the lower and upper mold elements. 8. The herein described ingot mold assembly comprising upper and lower mold elements, the lower mold element constituting a. support and closure for the upper mold element, and a com pressible sealing layer of corrugated board com - bustible under temperature conditions existing faces of themold elements. 12. In a hot top adapted to be organized with an ingot mold, to provide a continuation of the mold cavity, which hot top includes a surface area which, in assembly with the mold'lies ad 30 jacent the face of the mold, the combination of a gasket member located against said surface area, said gasket member being formed of pulpous material and being cellular in structure, 'so as to provide a plurality of air cells between said 35 surface area and the adjacent face of the mold. WALTER M. CHARMAN.