Патент USA US3092889код для вставки
June 11, "1963 F. BAUER 3,092,879 METAL CASTING MOULDS Filed March '7, 1961 v 5 Sheets-Sheet 1 June 11, 1963 F. BAUER 3,092,879 METAL CASTING MOULDS Filed March 7, 196,1 5 Sheets-Sheet 2 74 L14 7 12/ 9 19 5 (IS } | J?15 l8 26' 21 Q / . ?l?/7 25 15 a 24 Q 15 9 25 II | June 11, 1963 F. BAUER 3,092,879 METAL CASTING MOULDS Filed March 7, 1961 5 Sheets—$heet 3 km ‘S 0Fl(1\ § W// /< / FIG.3 ‘ June 11, 1963 F. BAUER 3,092,879 METAL CASTING MOULDS Filed March 7, 1961 5 Sheets-Sheet 4 June 11, 1963 F. BAUER 3,092,879 METAL. CASTING MOULDS Filed March 7, 1961 5 Sheets-Sheet 5 70 FIG.6 United States ate ie 1 3,092,879 Patented June 11, 1963 2 3,092,879 Ferdinand Bauer, Tamworth, England, assignor to Foseco METAL CASTING MOULDS International Limited, Birmingham, England, a com pany of Great Britain _ Filed Mar. 7, 1961, Ser. No. 94,076 Claims priority, application Great Britain Mar. 11, 1960 6 Claims. (Cl. 22-31) then inserted between the slabs and the inner surface of the mould mouth to force the slabs tightly against one another. It may be noted however that the cost of hanger straps‘ or brackets of the type just described is substantial and is frequently out of proportion to the cost of the slabs themselves. It is accordingly an object of the present invention to provide a new method and means for mounting lining ‘This invention concerns improvements in or relating 10 slabs in a mould mouth. to moulds for the production of castings and ingots of molten metal and more particularly relates to the prepa ration or setting-up of such moulds prior to the casting operation. According to one aspect of this invention, there is pro~ vided a method of mounting a liner made up of slabs in a mould mouth such method comprising supporting ‘ the slabs in position in the mould mouth so as to contact When molten metal is cast in a mould the surface of 15 closely the inner surface thereof on supports which are the metal tends to cool ?rst. Premature solidi?cation of pivotally connected to a member located within the mould the surface metal however may prevent a natural flow mouth, ?xing the slabs in such position and thereafter of metal to accommodate the shrinkage of the metal, so removing the said member, with the said supports pivoted that imperfections may appear in the cast metal. To avoid inwardly away from the slabs, out of the mould through this it is the practice to provide a so-called hot top to 20 the mouth thereof. .7 the mould. This is normally an extension to the upper It will be appreciated that, using the method according part of the mould which is provided with means for pre to this invention, the liner is, in use of the mould, held venting premature solidi?cation of the metal in the hot top. A free flow of metal downwards is thus made pos sible and a casting or ingot substantially free from im perfections, and more particularly cracks and ?ssures, may result. In order to prevent the premature solidi?cation re ferred to, it is common to provide a lining to the head of the mould (or to a hot top unit superimposed on the mould) which will have the effect of preventing or re versing flow of heat away from the molten metal. Thus the lining may be of a heat-insulating refractory material. However a method which has secured widespread ap in position without the use of support brackets. According to a further aspect of this invention, there is provided a jig for supporting the slabs of a sectional liner in a mould mouth prior to the wedging of the slabs in the latter, such jig comprising a central support mem ber adapted to extend axially downwardly into the mould mouth, a member movable relatively to the central sup— port member, a plurality of supports for a slab or slabs spaced outwardly from, and arranged at suitably spaced positions around, the central support member, and a link age coupling each support to the central support mem ber and to the member movable relatively thereto, the proval and extensive use is to provide as a lining in the 35 arrangement being such that the two members may be hot ‘top a layer of a composition which is ignited by the held relatively to one another in a position in which the molten metal and the constituents of which react exo said linkages maintain the supports in the correct posi— thermically to provide heat for holding the metal in the molten condition for as long as the particular circum stances require. Such an exothermic composition may contain aluminium, a quantity of oxidising agent stoichio metrically insufficient to oxidise completely all the alu tions for supporting the slabs and thereafter one mem— ber may be moved relatively to the other member to cause collapsing movement of the linkages to move the supports inwardly towards the central support member so that, after wedging of the slabs, the jig may be col-. minium present and a small proportion of a ?uoride, lapsed and removed through the mould mouth. e.g. an alkali metal or calcium ?uoride, aluminium ?uo 45 To support the jig whilst this is in position in the mold ride, silico?uon'de or boro ?uoride. Compositions of mouth and during the wedging of the liner sections, the use in this connection are described in British Patents Nos. 627,678, 769,719, 774,490, 774,491, and 812,583. Whether the lining is formed of heat-insulating refrac tory material or exothermic material or consists of lay ers of both, it is convenient in practice to prefabricate the lining in slabs and to wedge the slabs into position to constitute a complete lining, the slabs being placed in position through the open upper end of the mould or hot top (which open end is hereinafter generally referred to 55 as the “mou ” of the mould). When the mould is jig advantageously includes a cross beam extending trans versely of the central support member and carried at its ends by legs adapted to rest on the lip of the mould mouth. Conveniently, the said cross beam is adjustable vertically on the legs so as to vary the distance of this cross beam above the mould, and thus the extent to which the central support member extends into the mould mouth. Preferably, each support is carried at the outer end of an arm, the inner end of which is pivoted to the central support member or the member movable relatively there large the slabs ‘may be of substantial dimensions and to, and a link is pivoted to such arm between its ends weight and there is considerable dif?culty in holding them and to the other of the two members. in position while they are ?xed by wedging them. Where the support-carrying arms are pivotally mounted Various methods have been proposed to overcome this 60 on the member movable relatively to the central support. di?iculty, for example the provision of rods passing member, the said member may be the said cross beam through loops on the slabs, the rods lying across the and the central support member may be mounted on mouth of the mould so that the slabs are suspended. In the cross beam for movement vertically relatively to the another method the slabs are supported in the mould latter. mouth by a plurality of brackets which are arranged at 65 In the preferred construction of jig according to this spaced positions around the latter and each of which invention, however, the support-carrying arms are piv comprises a ?at plate lying closely adjacent the inner otally mounted on the central support member and the surface of the mould mouth and having, at its lower end, said links are coupled to a member movable relatively an inwardly extending ?ange on which the lower edge to the central support member. Advantageously, accord of the. slab rests and, at its upper end, an outwardly ex 70 ing to a further feature of this invention, the said cen tending ?ange which rests on the lip of the mould mouth tral support member comprises a shaft to the lower end‘ to suspend the bracket within the latter. Wedges are of which the support carrying arms are pivoted and the 3,092,879 4 member movable relatively to the central support mem wing nut 13, for preventing accidental removal of the pin ber is a sleeve or bush slidably mounted on the said shaft, the arms being coupled to this sleeve or bush by the said links so that movement of such sleeve or bush 12 from the bores in which it is engaged. , ‘ Each leg 7 preferably has at its lower end, as shown, a foot 14 extending transversely of the leg to give greater stability to the jig when this is in use. axially along the shaft causes pivoting of the arms about their pivots at the lower end of the shaft. 7 At its lower end, the shaft 5 has, projecting outwardly therefrom or equiangularly spaced positions around the To hold the sleeve or bush ?xed relatively to the shaft shaft, four lugs 15 to each of which is pivoted an out Wardlyv extending arm 16 having at its end 'a substantially leasable locking means may be used. In a preferred con 10 triangular plate 17 forming a support for the slabs. At a in the position in which the supports carried by the arms are in their slab-supporting positions, any suitable re struction, the sleeve or bush carries an abutment which normally engages an element ?xed relativelyrto the shaft, but which is manually movable out of engagementwith position between its ends, each arm v16 has pivoted thereto a link 18 which extends upwardly and inwardly towards the central shaft 5 and which is pivoted at its upper end to the abutment to free the sleeve or bush for movement a lug 19 projecting outwardly from a sleeve 20 s-lidable on 15 the shaft. The sleeve 20 has welded thereto at each of. along the shaft. two diametrically opposed positions a thin rod 21 which Preferably, the number of the supports of the jig, and extends upwardly from the sleeve 20 parallel to the shaft 5, the arrangement of these supports, is such that, in use the two rods carrying at their upper ends a collar 22' of the jig, a support is located below each junction of which is a sliding ?t on the shaft; slabs. Thus, where the mould mouth is of substantially Just below the cross beam6 is located a cranked handle square cross-section, as is frequently the case, and four 20 23 which is of a ?at plate form located with its plane horia liner sections are provided, one to line each side of the zontal and is pivoted at one end to a post 24 secured to the square, the jig will have four supports and the arms will cross beam adjacent the centre of, the length thereof. be arranged at positions around the central support mem~ The other end of the handle 23 is supported on a her or shaft at an angular spacing of 90°. In order that invention may more readily be under 25 bracket 25 secured to the cross beam and at an intermedi ate position -a tension spring 26 secured to the handle and stood and further features appreciated, reference will now the cross beam urges the handle towards the shaft 5. be made to the accompanying drawings in which: In use of the jig described above with reference to FIGURE 1 is a perspective view of one embodiment of FIGURES 1 to 3 the sleeve 20 is located in the position jig according to the invention, the jig being shown in position supporting liner slabs a mould mouth, part 30 on the shaft 5 shown in FIGURE 1 such that the arms 16 extend substantially horizontally outwardly from the of which is broken away, whilstsuch slabs are being wedged therewithin; . shaft and the supports 17 are in horizontal planes at the . appropriate distance from the shaft to be adjacent the inner surface of the mould mouth when the lower part of the jig is inserted into the latter. With the sleeve 20 in this position, the collar 22 is positioned, just below the cross beam 61and is held in this location, as shown in FIGURE , FIGURE 2 is a plan view of the jig of FIGURE 1; FIGURE 3 is a view corresponding to FIGURE 1, but showing the jig in a collapsed condition for removal from the mould mouth after wedging of the liner slabs therein; FIGURE 4 is a fragmentary perspective view illustrat ing second embodiment of jig according to this invention, this being a modi?cation of the embodiment of FIGURES 1 to 3; and . 1, by the handle 23 on which the collar 22 rests. v The legs 7 are mounted on the lip of the mould mouth 40 so that each of the plates 17 is located at a cornerof the inner surface of the mould mouth and the cross beam 6 is FIGURES 5 and 6 are perspective views similar to FIG URE 1 illustrating and fourth embodiments of jig adjusted in position vertically on the legs 7 until the plates 17 are located at the desired depth in the mould mouth. ’Ihe liner slabs 3 are next inserted into the mould mouth 'l‘he jigs illustrated in the drawings are designed for use in supporting within a substantially square cross-sectioned 45 so as to be supported on the plates 17 of the jig, each plate 17 supporting two adjacent slabs at the junction of the mouth 1 of a mould 2 a sectional liner comprising four latter, and the wedges 4' are then forced between the outer slabs 3 whilst the latter are ?xed in position, one lining surfaces of the liner slabs and the inner surface of the each side‘ of the inner surface of the mould month, by mouth as shown in FIGURE 1 to secure the liner slabs in wedges 4 forced between the liner slabs 3 and such inner according to the invention. mould mouth surfaces. . _ The jig illustrated in FIGURES 1 to 3 comprises a cen tral shaft 5 which, when the jig is erected in the position shown in FIGURE 1 for supporting the liner slabs 3, extends vertically downwardly into the mould mouth 1. 50 position. a When the liner slabs are secured, the jig is collapsed as I shown in FIGURE 3 by moving the handle 23, against the biasing provided by spring 26, away from the collar »22 so that the assembly of collar 22, rods '21 and sleeve This shaft 5 is secured at its upper end to a cross beam 55 20 slide down the shaft 5 under gravity and cause links 1-8 to swing the arms 16 and plates 17 downwardly and inwardly away from the liner so that the jig may be re moved from the mould. The embodiment of jig illustrated in FIGURE 4 is a parallel strips '8 arranged in vertical planes and secured together byv three cylindrical bushes, namely two outer 60 modi?cation of that of FIGURES ‘1 to ‘3 and is similar to the latter except in that the assembly of collar 22, rods bushes 9 and a central bush 10, which are located between 21 ‘and sleeve 20 of the embodiment of FIGURES 1 to the strips 8 and to which the latter are welded. 3 is replaced by a bush 27 which carries the lugs 19 and’ The shaft 5 is secured to the cross beam 6 by passing is slidable on the shaft 5., This bush 27 has a cross bore into and being welded to, the central bush 10, whilst the legs 7, which comprise rods of circular cross-section, ?t 65 28 adapted to register with a hole (not shown) through the shaft when the supports 17 of the jig are in their liner into the'end bushes 9. The latter have transverse bores supporting position. To hold the supports in this position, therethrough and the legs 7 have a vertically spaced series a pin 29 passes through the registering bore 28 and hole of cross bores 11 therethrough so that the cross beam 6 in shaft 5. When it is desired to collapse the jig, the' can be mounted on the legs 7 in any one of a number of 70 pin 29 is pulled out of the bore 28 and hole in shaft 5. vertically ‘adjusted positions by registering the appropriate To facilitate removal of the pin 29 and to prevent its cross bore 11 in each leg 7 with the transverse bore in the accidental loss, such pin is carried by a chain 30 having corresponding end bush 9 and inserting a pin 12 through ‘its upper end secured tothe cross beam. . the registering bores. As shown, the pin 12 may conven In the embodiment of jig illustrated in FIGURES, the ien?y have a screw-threaded end to receive a nut, e.g. a 75 bush'27 of the jig illustrated in, FIGURE 4 is replaced . 6 which is spaced above the mould and is mounted at each end on a leg 7 adapted to rest, as shown, on the lip of the mould mouth. The cross beam 6 is formed by two ?at 3,092,879 5 by a tube 31 slidable on the shaft and extending along the latter for most of the length thereof, whilst each support 17, instead of being carried by the described arrangement of arm 16 and link 18, is carried on a bracket 32 to which are pivoted two similar links 33, one of which is pivot ally mounted on a lug 34 on the lower end of the shaft 5 and the other of which is pivotally mounted on a lug 35 on the lower end of the tube 31. The tube 31 is welded to the bush 10 and the shaft 5 is free to slide therein. It 6 2. The jig speci?ed in claim 1 in which each of said legs has a series of cross-bores arranged in a row extend ing longitudinally of the leg, each of said cross-bores being selectively registrable with a bore in the cross beam, and the jig includes a pin extending through the latter bore and the leg bore registered therewith. 3, A jig for supporting the sections of a sectional liner in a mould mouth prior to the wedging of the sections in the latter, such jig comprising: a cross beam adapted, in will be appreciated that, with this arrangement, sliding of 10 use of the jig, to extend across the top of the mould mouth the shaft 5 within tube 31 causes movement of each sup and to be supported on the lip thereof; a shaft secured at one end to the cross beam and extending transversely port radially of the shaft. The shaft 5 extends upwardly thereof so as, in use of the jig, to project downwardly into through the centre boss 10 ‘on the cross beam 6 and the mould mouth; bush means mounted slidable longi carries at its upper end a handle 36 by which the shaft may be moved within the tube 31. tudinally on the said shaft; a plurality of arms, each piv To enable this embodiment to be used with a variety of mould mouth widths, the shaft 5 is arranged to be se curable relatively to the tube 31 in a number of alterna oted at one end to the end of said shaft remote from said tive positions. In FIGURE 5, this is shown as being cross-beam, the said arms being arranged at spaced posi tions round the central shaft and having free ends spaced outwardly therefrom; a plurality of ?at plate supports car achieved by having a transverse bore 37 in the tube 31, a series of vertically spaced bores 38 in the shaft 5 and a pin 39 engageable in such bores. If desired the shaft 5 could be provided with a single bore and the tube 31 pro ried one at the free end of each of said arms and each having a liner supporting surface; a plurality of links ar ranged at spaced positions around the central shaft cor responding to the positions of said arms, each link being pivoted at one end to the said bush means slidable on the vided with the series of vertically spaced bores. The jig illustrated in FIGURE 6 comprises, as before, 25 shaft and at the other end to the arm at such position and intermediate the ends of the arm; and readily releasable a central shaft 5', a cross beam 6 supported on adjustable locking means for holding the bush means in one position legs 7 and a plurality of supports 17 spaced outwardly of on the shaft, the length of the said links and the orientation the shaft. In this embodiment, the shaft 5 is slidable in of the said supports on said arms being such that, in said bush 10, each support 17 is carried by an arm 40 which extends upwardly to, and is pivotally mounted on, the 30 one position of the bush means, the said arms make an angle with the shaft not less than 90° and the said sup cross beam v6 and the arm 40 is coupled at, or adjacent, port surfaces of the supports are substantially perpen— its lower end to the lower end of the shaft 5 by a link 41 pivotally mounted on a lug 42 at the lower end of the shaft. Downwards sliding of the shaft 5 relatively to the cross beam '6 causes the support carrying arms 40 to pivot about their upper ends and the supports to move downwardly and inwardly towards the shaft. I claim as my invention: 1. A jig for supporting the sections of a sectional liner in a mould mouth prior to the wedging of the sections in the latter, such jig comprising: a central shaft member; a ‘sleeve member mounted on said shaft member and di mensioned so that free relative longitudinal sliding move dicular to the shaft. 4. The jig speci?ed in claim 3, in which said locking means comprises a pin insertable through a hole in the bush means and a registering bore in the shaft. 5. The jig speci?ed in claim 3 and including a collar slidable on said shaft to the side of said bush means nearer the said cross-beam and means connecting the said collar to said bush means for movement therewith and so that the collar is spaced from the bush means a distance such that, when the said bush means is in said one position, the said collar is adjacent said cross-beam, in which said locking means comprises a handle pivoted to the cross extending transversely of the shaft and sleeve members 45 beam and trained to a position in which the handle en gages the collar on the side thereof remote from said and ?xedly secured intermediate its ends to one only of cross beam. these members; legs at each end of the cross beam extend '6. The jig speci?ed in claim 3 and including legs at ing to one side thereof parallel to the said shaft member ment between the two members can occur; a cross beam and having a length less than that of the latter; a plurality 50 each end of the cross-beam extending therefrom in the same direction as the said shaft and parallel thereto, each of liner supports spaced outwardly from, and arranged at of said legs having a series of cross-bores arranged in a spaced positions around, the said shaft member to that row extending longitudinally of the leg, each of said side of the cross beam to which the said legs extend; and cross-bores being selectively registrable with a bore in the a linkage coupling each support to the said shaft mem cross-beam, and two pins, one extending through each of ber and to the said sleeve member and acting, on relative 55 said bores in the cross-beam and the leg bore registered movement occurring between these two members by therewith. movement relatively to the said cross beam in a direction to that side of the cross beam to which the said legs ex tend of that one of said shaft and sleeve members not connected thereto, to move the supports from a liner sup 60 porting position in which said liner supports are widely spaced from the shaft member to a collapsed position in References Cited in the ?le of this patent UNITED STATES PATENTS 2,952,886 3,022,551 Mazarakis ___________ __ Sept. 20, 1960 Marburg _____________ -_ Feb. 27, 196-2 778,039 Great Britain _________ __ July 3, 1957 FOREIGN PATENTS which the supports are retracted towards the shaft mem ber.