US1578083A - Means for supporting core bars in flasks - Google Patents

Description

March 23 1926. 1,578,083

J. R. McwANE MEANS FOR SUPPORTING CORE BARS IN FLASKS Filed Dec. 12, 1924 3 Sheets-Sheet 1 March 23 192e. 1,578,083

J. "R. MCWANE MEANS FOR SUPPORTING CORE BARS IN FLASKS ATTO RNEY i u' L, u l .l yf z Mmh 23 192 .`,1f.578,083

J. R. MCWANE MEANS FOR SUPPORTING CORE BARS IN FLASKS Filed Dec. 12 ,I 1924 3 Sheets-Sheet latented Mar. 23, 1926.

JAMES R. MQWANE, OF" BIRMINGHAM, ALABAMA.

MEANS FOR 4STFPIPOR'TING COREiBARS-'IN FLAS'KS.

Appli'cationled December 12, 1924. Serial No. 755,512.

To all whom t muy concern Be it known that I, JAMES R. MCVANE, a citizen of the United States, resi-ding. at Birmingham, in the county of Jefferson and State of Alabama.,` have invented a new and useful Improvement lin Means for Supporting Core "Bars in Flashs, of which: the tolloWing is a specification. y This invention relates toY means for supporting vcore bars in liaslrs` The; object is to provide means for rigidly supporting core bars of elongated form in flasks, such are used in the manutacture ot' pipe or analogous castings by the horizontal method', wherein the flasks are placed on the molding floor inl horizontal position for the reception of the molten metal, and wherein itis necessary that the core bar, together With the sand core there on, shalloccupyv a true concentric position in the mold throughout its length, in order to secure a casting ot uniform thickness.

Another object is to provide means` for this purpose that shall firmly grip the core bar beyond the ends ot the mold, and to et'- i'ectually prevent any sagging of the intermediate portion ot the core barand core due to the Weightthereot, and also to prevent any rising mover-nent of the saine due to tne floating actionv ot the inowing inolten metal when the same i-s poured.y

A linal object is to provide'y means Which will accomplish the above stated purpose vithout the necessity for using chaplets to support the core b ar at intervals, and which are necessarily lett embedded in the Wall 0I"- the casting, thevmeans herein. employed-A being designed to be readily attachedto existing tie-slr sections, such as are in use in horizontal pipe casting operations- Without the n cessity tor any alterations in thesarne,

'or the invention may be readily incorporated as an integral part of new eopeand drag sections, Without interfering in any manner with the present functions of the saine.

l full and complete ui-ide'rstanding ot the invention may be obtained from consideraL tion ot' the following detailed description, taken in connection with the accompanying drawings forming a part of this specifica tion7 it being understood that While the drawings shovyv practical 'forms of the invenftion, the latter is not to be con-fined to strict cont-'orn'iiq7 with the showing thereof, `but maj/,he Changed or modified', so long as such foundry and in a horizontal' position.

changes or modifications mark no material departure fromV the salient features ofthe invention, as specifically' pointed vout in the appended claims. n i

f In the drawings, in Which `similar reference characters designate corresponding parts throughout the several figures Figure l is a longitudinal view, illustratingidiagrammatically the princi-ple involved ink one form of the invention;

Figure 2 is a similar view ot another form;v Y

Figure 3 is a vertical longitudinal section through a double pipe molding flask used in the horizontal method ot casting and showing.r a core bar and corev supported therein by the improved means; v

Figure 4 is an enlarged end view of the same;

Figure 5 is a transverse sectional4 vieui thereof; s

Figure 6 isa plan view ot the subj ect inatter` oft. Fig. et, the upper or copev section being removed and showing the ends of the core bars, as .used in a double flask,.support-` ed in. the drag section by the improved means g. Y

.Figure .7 is ahorizontal' section taken on the line 7 7 of Figure 5; i

Figure 8 is a detail perspective oit one ot the outer lend supports for the core bars removed from thedrag 'section or lthe flask;

Figure 9 is. a similarview ot' one of the inner abu-tments removed from vthe cope' sectionaof the. flask; 1 l

Figure l04 is a detail section showing. the manner of inountin-gvthe set screws carried lby the abutments; Y

Figure ll is a detail perspectiveot one of the Wedges used in connection with the outer supports; s

s Figure 12 is an end vieur ot' a'simplihed form of end support s Figure 13 is a detail sect-ion taken on the line 13-13 of Figure 12; i

Figure 14 is a detail perspective vievs7 of one of the members shovvn in Figure 12'; c.

Figure l5 is a partial vertical longitudinal section similar to Fig. 3, but embodying the modi'lication ot Figure Q.

In the drawings there is illustra-ted a. coinvplete flask l used in the manufacture otl cast iron pipe, the said casting being done with the flask located on the door ot the The tlasl' comprises the lower section or drag 2,

ico

and the upper section or cope 3, each of which is substantially identical in forni, the cope being adapted to be superimposed, in reverse relation, upon the drag, after the sand molds have been made therein, and the core bar 3a, having the sand core thereon,has been placed in longitudinal position within the same.

Each flask section is provided with end walls 4 of the form shown (although any other form may be employed), and a plu rality of intermediate webs 5 spaced substantially equal distances apart throughout the lengths of the sections, said webs being preferably formed integrally therewith and serving to strengthen the structure and to hold the sand therein.

The end walls 4 are preferably inclined slightly, as shown in Figure 3, and are pro' vided with a pair of lifting arms or trun* nions 6 at each end of each section, one of said arms or trunnions being longer than the other to facilitate turning of the section, or inverting the same while suspended in the looped ends of lifting cables. rlhis feature is claimed in my pending application, filed August 25, 1924, Serial No. 734,002.

Adapted to be secured to the outer faces of each end wall 4 of the lower or drag section of the flask, is a cast metal bracket or plate 7 formed preferably of iron and partaking of the shape of the letter W, there being two V-shaped branches joined together and provided with an attaching flange 8 located at its lower and inner edge. The flange 3 is provided with a plurality of bolt openings 8a for the reception of set screws 8b, which rigidly secure the brackets in position on the outer faces of the end walls 4.

Each arm of the il-shaped branches is pro vided with an elevated face or pad 10 formed integrally therewith and extending upwardly and inwardly toward eachother, each face being substantially at an angle of 45 to a vertical line through the axis of the core bar 3a, and equidistant from the same.. At the outer ends, each bracket 7 is provided with arcuate recesses 11, which are adapted to rest upon the aforesaid arms or trunnions 6, the latter being round in cross section, and thus strengthening the support of the bracket. rlhe brackets 7 may, however, be otherwise held in position on the end walls, as by welding or brazing the saine, as will be readily understood.

Tapered wedges 12 are adapted to be driven in between the active faces of the pads 1,0 and the adjacent extending ends 13 of the core bar 3a, where the same project through the openings 4a formed in the end walls 4 of each of the flask sections, after the said core bar has been applied in position, in a manner to be explained.

The transverse web 5 next adjacent to the end walls 4 in the upper or cope sections, is

each adapted to support a casting or plate 14 formed to fit transversely within the cope, and having the necessary semi-circular openings 15 formed in their lower edges to correspond with the openings 5LL ofthe webs, and adapted to receive and accommodate the core bar and core, as clearly shown in Figure 5 of the drawings. rlhe lower outer corners of the plate 14 are cut away at an angle, as at 16, to fit against the abutting flanges 17 formed in both the cope and the drag and to thus receive additional support.

Located substantially over the centers of the openings 15 of the said plate are vertically disposed slots 18, which are adapted to receive the tap screws or bolts 19 threaded into the adjacent web 5, the slots permitting oi more readily assembling the plate in position and seating the saine uponr the flanges 17, after which the screws are tightened.

Outstanding lugs 20, formed integrally with the plate, extend outwardly in angular relation to each other and at substantially 450 to the axis of the core bar, said lugs being suitably apertured and threaded for the reception of set screws 21, carrying swivelled heads 22 adapted to bear upon the core bar, when turned inwardly, to hold the same down, and at the same time prevent any lateral moi/'ement thereof. The wedges 12 act to hold the ends of the core bar up and also prevent any lateral movement thereof. `When the lower or drag section of the flask is properly rammed on the molding machine to forni the mold therein and removed to the casting floor, the core bar 3a with the core already formed thereon, is then positioned iii longitudinal alineinent with the lower lia f of the mold in the dragV and lowered to rest upon the hard packed sand within the end pockets of the drag between the end walls and the first webs. The cope with the complementary half of the mold formed therein is then lowered into position,l the flanges 17 abutting entirely around the two members and supporting the weight of the upper section, and the cope and the drag are locked together. The set screws 21 are then turned to contact tightly with the core bar, which may be readily done by removing a portion of the sand over the innermost screws while the outer screws 21 may be easily reached through openings 23 even though said bar be of a larger diameter and sufliciently stiff to support its own' weight without sagging. This upward tendency of the intermediate portion is directed against the set screws which constitute abutments 2Q, as indicated in Fig. l and the result is that the outer end portions of the bar where projecting beyond the abutmentsl are forced to act as levers imparting a. downward tendency to the'ends of the bar, but this downward tendency is eectively resistedby the wedges l2, with the result that the bar is'rigidly held throughout its length and caused to lie concentric? with they mold, and thus insure a uniform thickness of the wall of the casting.

Where smaller diameter core bars are considered and which might Sag by their own weigh-t, dou-ble sets of wedges l2 and double sets of abutments 22 may be einployed, indicated in Figuresy 2 and l5; it being readily understood that the arrangements already described may be duplicated in both the cope and the drag sections for this last-named purpose, to counteract both the upward pressure of the incl-ten ir'onand.

the downward eife'c't's of saggii'ig, as indicated by the arrows in saidh'gure.-

The heads 22. ofthe set screws are dianieti'ieally opposite the enacting wedges, as

shoi'vn in Fig. e, and. thus the bei'iding action of the is resisted in all directions, and this essential,'inasmuch in pouring the .iolten metal in doubie iiaslrs, such as iilustrated in the drawing, the said metal. enters in' centrally disposed sprue holes or' gates arranged in longitudinal* series, one for each pocket between the webs 5,v and then Y J.- -Q gates to passes through laterali-v disposed the molds atdiiffer upoints alo their lengths, so that the metal tends to force the core bar outwardly aswell as upwardly.

in Figures l2', 1 3 and l-/i there is shown simple forni of the. invention, wherein the wedges are dispensed witlnvand the sup-k ports are in the roi-'in of two identical plates 2e having semi-circular openings or seats 25 for receiving andl supporting the ends 13 of the core bar, said seats' being elevated above the` cut-out portions e of the end wall 4 of the lower cr drag section 2. The plates are provided with vertical slots 26 for the reception of screws 2T entering the end wall, and serving in addition to dowel pins 28 to hold the plate to the sectioinand to support the weight ofthe core bar, the said plates being: further provided with arcuate seats Q9 adapted to rest upon the' aforesaid lugs or' arms 6. I

From the foregoing it will be seen that a simple, strong and durable means has been provided for easy attachment to cope and d 'ra-:g sections of pipe molding Llashs or other flasks 4for supporting the core bars in alineinent with thev mold, and to' positively 'prevent the movements thereof incident to the v'elfects of sagging and from the floating effectsV of the inflowing molten iron, the said means being arranged in positions so as not to interfere with the placement of the cores the bar adjacent to and spaced from said supports, and wedges adapted' to be inserted between the ends of the bar and the supports to insure close contact with tue abutinents and prevent any upward movement of the intermediate portion of the bar and consequent downward movement of the ends thereof.

2. In molding flasks, a core bar having a core thereon, a pair of spaced end supports carried by each end of the drag section of the flask to support 'theweight'of the core bar and to prevent any downward and sidewise movement ofl the ends of the same', and a pair of spaced abirtmeins.carried by each endl portion the cope section of the flask and contacting with the core bar in longitudinal spaced relation to said supports to prevent any upward vand sidewise movenient of the intermediate portion of the core bar. v

In means for supporting a core bar in a flaslrfork casting pipe or the like, outer pairs of supports adapted to bear beneath and on top of the core bar at the ends thereof,l and inner pairs ofx abutments adapted to bea' heneath and on top of the core bar in spaced relation to the supports to prevent novemcnt of the-intermediate portion of the core bar inany direction, said supports and said abutinents contacting with the core bar beyond the ends of the core.

4. In means for supporting core bar in a flask for casting pipe or the like, upper and lower1 supports carried respectively by the copeV and drag sections of the and located adjacent to the ends of the core hai', wedges interposed between the Asaine and the core bar to bind the saine, and upper and low r abutiuents carried respectively by the cope and drag sections and contacting with the bar adjacent to and between the supports to prevent movement of thel intermediate portion of the saine.

5. Means for supporting core bars in flasks, comprising' a combined bottom and side support adjacent to the end thereof, andan abutment bearing on the top and sides of the bar and spaced at a distan-ee from the lower support to constitutea fulcrum when thepressure of the inflo\ .fing iron causes the terminal portion of the bar to actas a lever and to prevent side movenient as well as upward movement of the central portion of the bar.

6. Means for supporting core bars in flasks, comprising combined bottom and side supports located adjacent to the ends of the bar, and abutments bearing on the top and sides ofthe bar at a distance from the supports to constitute fulcrums when the pressure of the inflowing iron causes the terminal portions of the bar to act as levers and to prevent side or upward movements of the central portion of the bar.

7. Means for sul'iporting a core bar in a flask comprising upper and lower coacting clamping means located near the ends thereof, and upper and lower opposed abutments bearing on the bar in spaced relation to said clamping means, the lower abutments acting as fulcrums for the tilting ends of the bar when the central part of the latter tends to sag through its weight, such tilting being prevented by the upper clamping means.

8. Means for supporting a core bar in a flask comprising upper and lower coacting clamping means located near the ends thereof, and upper and lower opposed abutments bearing on the bar in .spaced relation to said clamping means, the lower abutments acting as fulcrums for the tilting ends of the bar when the central part of the latter tends to sag through its weight, suoli tilting being prevented by the upper clamping means, and the upper abutinents acting as fulcrums for the tilting ends of the bar when the central part of the latter tends to rise from the pressure of the inflowing metal, such tilting being prevented by the lower clamping means.

9. h/leans for supporting core bars in flasks without the use of chaplets comprising plates adapted to be secured to the outer faces of the end walls of the lower or drag section of the flask, each plate having opposed faces for the reception of wedges to bear against the undersides of the projecting ends of the core bar and constituting supports therefor, other plates adapted to be secured in the upper or cope section of the flask, and adjustable set screws mounted in said plates and adapted to contact with the upper sides of the core bar in spaced relation to the supports to prevent the intermediate portion of the bar from rising by floating on the molten metal.

10. Means for supporting core bars without the use of chaplets comprising brackets adapted to be secured to the ends of existing drag sections of flasks, said brackets having inclined, opposed faces below and equi-.distant from the axis of the core bar openings in the end walls, wedges adapted to be driven in between the faces and the projecting ends of the core bar to support the same, plates adapted to be secured to one of the transverse webs of existing cope sections of flasks, said plates having inclined, opposed lugs arranged above and equidistant from the axis of the core bar opening in the web, and inclined set screws mounted in the lugs and adapted to bear down on the core bar adjacent to the supports to resist bending of the core bar through the action of the incoming metal.

11. Means for supporting, without the use of chaplets, core bars in pipe flasks, composed of lower or drag sections and upper or cope sections, said means .comprising brackets adapted to be secured to the outer faces of the end walls of the drag sections and having a pair of inclined pads or i* faces arranged at an angle of substantially 450 to the axis of the core bar and below 'the same, other brackets adapted to be transversely secured in the cope sections in spaced relation to the pads or faces and having i11- clined lugs provided with adjustable set screws arranged at an angle of substantially 45o to the axis of the core bar and adapted to bear down on the same, and wedges adapted to be driven in between said pads or faces and the core bar in opposition to the set screwsto prevent'vertical or lateral movement of the bars.

12. Means for supporting, without the use of chaplets, core bars in pipe flasks, composed of lower or drag sections and upper` or cope sections, said mea-ns comprising brackets adapted to be secured to the outer faces of the end walls of the drag sections and having a pair. of inclined pads or faces arranged at an angle to the axis of the core bar and below the same, and wedges adapted to be driven in between said pads or faces and the core bar to prevent vertical or lateral movement of the bar.

13. Means for supporting core bars in flasks without the use of chaplets comprising brackets transversely mounted in the cope section and having inclined lugs, and set screwsmounted in said lugs at an angle to the axis ofthe core bar and adapted to bear on the same.

14. Means for supporting core bars in flasks without the use of chaplets comprising brackets transversely mounted in the cope section and having inclined lugs, some of said lugs being larger than others, and set screws mounted in said lugs at an angle to the axis of the core bar and adapted to bear on the saine.

15. Means for supporting core bars in pipe flasks without the use of chaplets, comprising a plate mounted on one section of the flask and having substantially semi-circular openings or seats at the inner edge where the flask section joins with the other section of the flask, and means for adjustably mountlGO ing said plate to the end wall of said flask flasks without the use of chaplets, comprising a plate mounted on one section of the flask and having seats at the inner edge where one flask section joins with the other flask section, said seats supporting the eX- tended end of the core bar and resisting downward movement of the saine, and other seats provided on the plate and engaging with the lifting` trunnions of the flask.

17. In means for supporting` core bars in flask sections, wedge seats carried on the outer faces of the ends of the drag, said Seats being` arranged at opposite angles beneath and in spaced relation to the core bar, wedges adapted to he driven inwardly and downwardly between the seats and the core bar t0 support and prevent side movement of the core. Y

18. In means for supporting corebars in flask sections,wedge seats carried on the outer faces of the ends of the dra-g, saidV seats being` arranged at opposite angles beneath and in spaced relation to the core bar, wedges adapted to he driven inwardlyand downwardly between the seats and the core har to support and prevent side movement of the core, inclined lugs carried by the cope in spaced relation to the ends thereof and in spaced relation to the core bar, and set screws threaded through the lugs and directed inwardly and downwardly at opposite angles to hear on the core bar and hold same down upon the supporting wedges and prevent side movement thereof.

In testimony, that I claim the foregoing,l as my own, I have hereto ahixed my signature.

JAMES R. MCWANE.

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