US1056961A - Mold for making metal castings. - Google Patents

Description

T D. WEST.

MOLD PoR MAKING METAL CASTINGS.

APPLICATION FILED PBB.29, 1912.

' Patented Mar. 25, 1913,

4 SHEETS-SHEET?.

wif?? weg if 7 T. D. WEST. MOLD FUR MAKING METAL CASTINGS.

4 SHEETS-SHEET 2.

Patented Mar. 25, 1913.

APPLICATION FILED FEB.29, 1912.

wz' Zne/ed I T. D. WEST.

MOLD POR MAKING .METAL CASTINGS.

APPLIGATON FILEDIBB. 29, 1912.

Pate'mseol` Mar. 25, 1913'.

" 4 SHEETS-SHEET 3.

n Si

T. D. WEST.'

MOLD FOR MAKING METAL CASTINGS.

APPLICATION.I`ILED IEB. 29, 1912.

Patented Mar. 25, 1913.

v 4 SHEETS-SHEET 4.

PATENT OFFRE ,THOMAS D. wEsaQ-o/F CLEVELAND, oir'io.

'l 'MOLD :Fon MAKING METAL CASTINGS.

' To all whom t 'may oonoem:

Be it known that I, THoMAs' D. WEST, a

i vcitizen of the United States of America, re-

for instance, as a` chilled carLwheel.

siding atCleveland, inthe cfunty of Cuyahoga and StatefofJOhio, have invented certain new and useful Improvements` in Molds for Making' Metal Castings; and I hereby declare the following to be a full, clear, and exact description of theinvention, such as vwill-enable others skilled in the art to which it pertains to make and use the-sama i This invention relates to improvements in molds forma'king metalcastings, and per- "ftain's more especially to a mold suitable forv use in casting a chilled annular object, such,

lOne object ofthisinvention is to produce! l' achilled'car-wheel which has the greatest l. de-'pth `and hardness of chilling where the treadand throatof the wheel are subjected tothe greatest lwear and has less depth of chilling or no chilling atallvwhere `the tread and` {iange aresubjected to little or no wear,

'l vround castingr so that the production of an excessively` chilled car-wheel is avoided and astronger and longer lived wheel-is produced.

Another object is 'to 'provide theimold with simple, efiicient and reliable means` whereby tliecasting formed in the "mold during the' operation of'themold ismost` accurately' centered and 4kept centered rela1 *.tivel to the -mold during-the operation of the mold, tothe end of producing a perfect-1y which is uniformly chilled circumferentially. i Another Objectis tp'have-the castingjcen# tering ,means comprise radially shiftable members spaced'and arranged circumferen- .tially of the molten-metal-receiving chamber' ofthe mold and to providefmeans'where- .by `said casting-'centering members during the` vcooling and horizontal contraction of the casting are shifted in wardly-durin'gthe lateral and"outward expansion ybyheatfof'` `the .chilleror ehill employed in forming. tliev surrounding wall of said' chamber, and`to' return said. casting-centering members` into their'outer and normal position'by and dur- 'after the lateralthe chill.

ing the horizontal contractionof the'chill and outward expansion 'of i Another object is tow'cool the core ofthe tin contactwith the cast-ing. With these objects in view', and tothe end of attaining other advantages hereinafter ltrated -in -theaccompanying drawings.

I sorbing medium to pass through the`core in- Specicaaon arreter? Patent. j Patented Mai-.25,1913 lApplioaton led February 29, 1912. Serial No. 680,688.

proximity tout-helexterior of the core but without contact with themetal arranged next to and surroiuidingthe core so as yto cool said'metfal` without chilling. itduring the chilling'or cooling of the. casting at the throat and. tread of the wheel, and thereby prevent or greatly reduce cont-raction- 4strains internally of the casting and produce a car-wheel which is strongerl and better' ableto .withstand the shocks and abuse to which Aa car-wheel is subjected in general Another object is to provide said' core with a head instrumental in 'forming the 1 centrally and longitudinally offthe body of thecore and.ha'vingla head"arra;nged cen. trally of' and more especially reinforcing thel head of the core.

- Another-object iS `tospirsovide means wherei" by a heat-absorbing medium, such, for in.-

stance, as air,may be caused to pass endwise through. the core vbetween vthe core-reinforcing metal. barand the exterior of .the

body o f the core and' at points spaced cir* oumferentia'llyl of said barwithout coming appearing, this invention consists in certain featluresfof construction,` and combinations 'A and arrangement' of parts, hereinafter de.- scribed, pointed out in the claims, and illus v l'nV sai'dY drawings, Figure 1 is a centralv vertical section of my improved mold ready for pouring. Fig. 2, is an enlarged view of a port-ion of Fig. '1. Fig. 3 is a view -cor1espondingfwith Fig. 2, 'except that Fig.`-

3 illustrates the lat-eral and outward expan` sion of the chill by heatduringthe-liorizonf 'tal contraction of the casting.

Fig. '4 `is a horizontal section on linea-4, Fig. 2,'lookimg fupwardly. Fig. A5 is a `section online 5--5,`Fig. 8, looking downwardly. Fig. 6 is ahorizontal section onl line GMG, Fig. 2',

-ioo

looking downwardly. Fig.A 7 is a horizontal section on line 7-7, 2,'.lo'oking upiwardly. Fig. '8 is a horizontal section on linel8-8,'Fig'.1,looking downwardly. Fig., i

9 is a horizontal section on line 9 9, Fig. l, i

looking upwardly. Fig. l0 isa horizontall section on line -10, Fig. 1, docking downwardly. Fig. 11 is a vertical ,section on line 11-11,. Fig. 1, looking inwardly. Figs'. from 2 to 11 4inclusive are drawn on a larger scale than Fig. 1.

` -The mold` illustrated consists in the main of an upper mold-part or cope, a lower mold-part or drag and a central mold-part which is shown formed in the main by asectional chiller or chill.

Referring to Fig-1 of the drawings,-A

- indicates a vertically arranged annular metal casing 'which' forms a port-ion of the lower mold-part .or drag and rests on a horizontally arranged metal plate a forming the i* bottom of the drag and provided with :i

vertically downwardly projectingl annular flfanggge 13- serving to elevate said bottom -P above the floor .or support upon which the mold is to be mounted. The dragis rammed with sand or substantially non-chilling ma.

, terial, and the Vtop or upper port-ion of the body of packed. sand -14 ofthe drag has the contour required to 'form the bottom ofthe casting. B indicates a vertically arranged suitably supported annular metal casing which forms a portion of the. uppermoldpart or cope. The lcope `is rammed' `with sand, and the body of packed' sand 15 of the cope has its bottom'or lower portion contoured as required to formthe top of the casting. The cope and t-he` drag are spaced vertically to effect the formation between them of the molten-metal-receiving chamber of the mold, which chamber is enlarged diametricallyand annularly at its lQwer end, as at d (see Figs. 1,-2, 3,-and 7). i' j i The central mold-part (see Figs. 1, 2 and 3) is instrumental in vformingthe'surrounding wall ofthe char-nberCA and comprises a vertically arranged annular circular chiller or chill h-aving a vertically arranged annular metal body D forming' the lower. portion ofthe chill, and metal sections EA which form the upper inner 'annular port-ionof the chill yand are supported from said body. "The body DL of the chill `is preferably of castir'on, whereas the chillesectionsE- may be of steel.` Preferably the body D is internally of its upper portion wit an annular receSSQo` whichy is concentric relative to .the.chamber"C;.,Said body-,D has an inL ternal surfacefl'participating in the formation of the surr'o ,ding wall-of the chamber C and extendingififrom the recess d downwardly to the dlametrically enlarged lower ende of said chamber.4 i The chill-sections E I are seated or rest on the bottom of the recess d and extend circumferentiall'y of the chambei C and areinstrumental in forming the upper portion of the surrounding wall of said chamber.v The chill-sections E are arranged radially relative to the chamber C v j and have their internal surfaces or inner ends with the'- in! faces ilush at their lower rovided ternal surface 18 of the bodyiD of the chill.v

Adjacent chill-sections E abut. against each other at their adjacent side edges.

By the construction hereinbeforedescribed and illustrated in'1'Figs.' 1, 2 and 3.ofthe drawings, it .will be observed that the chill` ing body D of the chill or central mold-part participates vin 'the formation of the surrounding wall of the chamber. C and has its -internal surface 18 extending from the diametrically enlarged lower lend c of said chamber upwardly about half the distance between said' enlarged end. of the chamber4 and the upper end of the chill, and that said chill also has an upper inner annular chillin portion which is formed independently ofg the aforesaid body7 of the chill and como'sed of sectionsE which are arranged sub-` stant-ially radially of the chill. 'struction of the chill constitutes an important portion oflmy `present invention..v

Figs. 3 and show a wheel-forming casting H inthe mold, and, z.referring to Fig. 3

Said con-` r.-

of the drawings, h indicatesftheannular fiange formed on andfleiiternally of the said casting at .one lendbf'fthe casting, 4which fiange is shownformed at the lower end of theacasting and has'l 'a rounded peripheral surface,.-an`d -the"throalt 16,0f the wheel is formed at the junction of the; inner side o'f said flange with the tread 171. of the wheel.

Theange. of a car-wheel tobe'castfinthe mold illustrated -is obviously therefore formed next above the outer portionofL'tlie drag. The lower section or portion 4of the vico central mold-part (see Figs-1, 2,3, 'and 7) r9`is arranged toA form the outer portion of the top Wall and upper dragjis contoured and arranged as required to for-inthe bottom-wall and loivelrp'ortion.' of theA surrounding wall, of saidienlarge-fment of 'said chamber. The surrounding wall of the chamber C is formed-"in the main bythe inner faces'of the chil'lf'selctions E and by the internal circular 'surface-18 of the body D of the chill, and theV tread of'` 'i i .the car-wheel to be cast is formedfat'v said surface 'of-'aid body and at said faces., of

saidchilltions E.' The inner `I owerportionaf he 0d IDOf the Chiu is Contoured as required to orm the inner portion of the top wall of the diametrical enlargement. c

of the chamber C andto render saidportion.j

of said bodyfinstrumental 'in effectingthoj formation of f the throat 16S-of the vwheel;- The sand-body .s preferablyoccupies a recess` 2O formed in the lo'wer portion of the body D of the' chill and is applied to the chill in any approved manner, which recess is subdrag-casing'is provided atjits top and near.

its circumferential surface with a laterally and outwardly facing annular shoulder 22 which is` voverlapped by lugs' 23 formed on.

the lower-end of. t-he bo'dy D of the chill. and spaced circumferentially of said vshoulder so as to prevent displacement of the saidl l body ofthe chill'horizontally independently 'of thedra'g. The shoulderg22 andithe lugs 23 vare'instrumental in centering the body D ofthe chillrelative tothedragduringthe assemblage Aof the componentparts of` the mold and areobviously relatively arL ranged to accommodate lateral and outward yex ansion by heat of said body ofthe chill indjependently of the drag. The bod of the chill rests at its lugs 23. on the ragcasing/A. vAn annu ar space-24 is formed at the inner sides of the vipper `portions of the flugs 23'and between'the body D .of the chill and the" drag-casing A'and arranged. suband' in communication between the lugs 23.

y with the external a'tmospheray The s acel 24 is'arranged between the recess 20 an the lugs 23, and the body of the chill is provided between said .recess 'and :said space with vent-holes 21 shown extending' from the top i of said*v recess laterally and outwardly and downwardly to said space into whichsai'd vent-holes discharge. Said vent-holest are spacedcircumferentially ofthe recess 20 and permit the escape, to the space 24 and consequently to the external atmosphere frornthe body s of substantially.non-chillingifiaterial, of' detrimental gases created within said body of substantially non-chilling material by the contact of saidA body -with molten metal 'during'the operation of the-mold. Y

The" body D of the chill (see Figs. 1,7 2, 3, 4, 5, and 6j) is provided at .the outer side ofthe recess-d with upwardly projecting lugs 27 which are spaced circumferentially of said recess and consequently.circumferentially of the` chamber C, and the cope-casing B-`is provided with downwardly prof jectingv lugs 28 which rest on theouter por- A tions of the lugs 27 and are spaced circumferentially o f the body D ofthe chill. Ob-. viously therefore the cope is mounted'on they 65 body D of thech-ill. Each lug 28. is prostantially ooncentiically relative tothe chill* vided at its lowerlend with a laterally and outwardly projecting shoulder 30 which 'is v overlapped by a` laterally and inwardly facing shoulder 31 formed on the adjacent=-lug 27. The lugs 27 and'28 and their shoulders 31 and 30 facilitate .the centering of the coperelative to the body D of the chill durf ing the assembling of the component parts of the mold, and Asaid shoulders 30 and 31 are relatively arrangedto accommodate the 'lateral and outward expansion of the body D of thechill by heat independently of the cope and the drag` The chill has -the inner upperportion Vor sections E thereof overlapped and largely bodyl oft-hegcopearound the chamber C, and said chambery (seeFig. 1) has a central upward enlargement 33which'is arrangedin line verticallywith a cavity 34 forming the lower. central'. ortion of said chamber and formedin an ;centrallyof the sand body 14 .of -the drag. yThe vsand-body 15 of the cope is provided in its under side and nextthe inner faces ofthe chill-sections E with an annular recess 35 whichis arranged concentrieally relative -to 'the chilland forms 'an u per annular enlargement of the cham; .ber

,and the outer Aside wall of said enlargement of saidchamber is formed bythe .portion 32 of said sand-body. Thecope and thefdrag of the mold illustrated are shown rammed to fitA them .forcasting a car-wheel which has ia hub provided with acentral bore ,extending therethrough", and consequently :an interiorly `.m etalreinforced covered," as at 32, (seeFig. `2) bythe'sandi baked sand-core having ,a body F shown composed of sand 1s arrangedvertically and centrally of the 4chamber C and extends up.- `wardly through saidchamber fromA th-e bot-` tom of the cavity 34. The sand-body lF'o'f the core is provided at its upper endwithf,

a head f whichi's integralfwithz. said bodyf and forms the -top wall of the upward en largement 33 of the-chamber C and the bottom ofa suitably formed pouring-basin 36,

and said headV is provided (see Figs. 1, 8

and 9) 'with gates 37 which establish communication between said basin and said chamber and consequentlyfor-m inlets for the passage ofmolten metal to said cham? ber. kThe pouring-basin 36 isv surrounded by .a metal casing 381 which is connected with the cope-casing B by bars 39 extending 4 substantially horizontally through the sandbody 15 of the cope'.

The interior metal reinforcement of the Acore consists of a met-al bar' G which is arranged vertically cent-rally of the sandbody jF of the core and extends from within the lower end of said 'body upwardly into the. vhead f of-said body Vand is provided atfits z u pperend with a'head g. The core is provided betiveen its exterior and the bai" G with passageways 40 which (see Figs. and

10) are parallel with and spaced eircumfer-A l ber downwardly to the plate a and commu-v nicates with a passageway 43 formed in and extending transversely of vsaid plate, and the l-astmentioned passageway is arrangedto conduct air or heat-absorbing medium under' pressure from a supply-pipe K which is pro'- vided with a normally closed valvels. Thehead g of the bar G is providedwithflaterally and outwardly projecting tubular members 45. which are spaced ycircumferenta'ally of said head. Each passagewayrr40"(seeFig.

l) communicates with a hole 44 formed'einf p the head g of the bar G. The holes/44 A(see- Figs. l and 9) are placed in communication' by the tubular members 45 with an annular chamber 46 formed around the head f between the upper and lower ends of said head,

which chamber `is placed in communication,V

. by passageways 47 which extend from said 46y and thence through the chamber through the surrounding wall-of the pouring-basin'and` through the' cope t0. the top of the cope, with the externalatmosphere. UponA opening the valve c `air or heat-absorbing medium supplied'A by the pipe K is conducted to and through the passageways 40 inthe core `and passes from said:

passageways' to and through the tubular members 45 of the head g into the chamber passageways 47 to the external atmosphere.

I would here-remark that afnot unimpor-.

tant feature of my present invention consists in the hereinbefore described construction of the core, and important to said construction is thel formation lof the passageways 40 dieA rectly in the sand-body of the core between the centrally locatedv metal reinforcement of the core and the exterior of the core and'externally of and'out of communication with but inlproximity to the chamber C, so that said'pa'ssageways are especially well .adapted for conducting off heat with facility from the core-surrounding body fof Ametal lduring i' the operation of theV mold. f

Preferably recess a? has' a substantially horizontally arranged bottom which (see Figs. l, 2 and 3) is. provided centrally with an annular depression 49 which extends lc ir.- cumferentially of and isspaced from and concentric relative to the' chamber;C, and` the chill-sections E rest on said bottom atl each side of said depression.. acent chill.-

w in sections E (see Fig. 6) are in. contact with each other at their adjacent sides. The chillsections E extend a suitable distance above therecess d in the body' D of the chill, and 'eachchill-section E is provided at its outer sideandlower end with a laterally and outwardly projecting flange 50 provided centrally (see Figs. 2,- 3, and 6) with a recess 51 which extends from top to bottom of the Harige.. Each chill-section E tapers in crosssection toward its upper end and has its outerside sloping from the top of the flan e 50 of said section 'upwardly and inwardly and `exposed to the external atmosphere. Obviouslytherefore the chill-sections E are reduced in thickness toward their upper extremities, and it will be' observed therefore i that the-chill has .its'upper inner annular portion 4which 1s composed of sald sections so contoured 1n cross-sectlon, and said portionof thechill has such dimensions relative .to theA body D of the vchil-l, that-'said upper inner portion 'of theA chill has a con-y siderably .smaller heat-absorbing capacity 'thansaidibody and that the mean depth of chilling ofthe tread-forming port-ion of a wheel being cast in the mold is desirably lessfbetween the-cent`ral portion of the tread.

and the nonflanged end ofthe wheel than` between s'aid`- portion of the tread and the throat of the Wheel. HenceI a car-wheel cast in my improved mold has the greatest depth and hardness of chilling where the tread and throatof I the wheel are subjected to the greatest wear and has less depth of chilling or is not chilled atall ..where the tread and lflange are subjectedto-little or no wear, so

that the production of-an excessively chilled u longer-lived wheel is produced. The approximate depth'of chilling of the casting" produeddurng the operation of myv improvedk I would here remark thatthe recessesf in the flanges 50 of the chill-sectionsEjcoms Acar-wheel' is avoided and a stronger and A mpld is indicated 'by the dotted line A municate with the depression 4 9 in the'bottom of the recess Zand that sald depression 49 and said recessesl'notvonly effect '.a re- 'ductionto aminimum of the machining re quired to .properly fit said sections to the body D of the chill but facilitate the escape intosaid depression of anygrains of vsan'd Twhich mayA find access'to the j'ints formedA between said sections E and said body and reduce the chilling influence of said body at said joints.- It will be observed also that the "formation of the depression 49 under'the chill-sections E leaves only uninterrupted Contact circumferentiallyof the chamber C between the chill-body D and saidl'chill-sec tions E under the inner .portions of. .saidchillsections, so that thel heat transmitted from the chill body D to the chill-secti ons E during the 'operation of the mold is reduced tofa minimum. The relativearrangementl "and contouryof the chillbody- D and the "`ch11l,sec tions E constitute an important por;

tion of my presentinvention.

My invention -also comprises means for removably securingv the chill-sections E to 'chill-sections and is Aclamped down onto or against said anges'by. clampingv plates Z Which are spaced circnmferentially offand;

2o i 1;- iobvious that" any chilllsectionor chillj-sec--jy tions E that may have become Worn outor'x' j mutilated from. any'canse can extend over said ring and are secured-preferably removably .by screws 52 tothe"body D ofthe ch-ill.

By the construction. just describedl it? is Vbe readily and.' economically replaced. Y u

The casting Aformed inthe mold obviously contracts horizontally or diarnetricallyl v v'heri.

it cools andtherebyfrees the chill andobvi-- y ously 'during the'irst cooling and 'contrae-'j chill .expands laterally andoutwardly heat.l Not nnimportantitherefoi'e is the-prolvision of 'the'mold tvith simple, etlicient'vand reliable' means whereby; the casting formed in the mold during the operation of the mold `is most accurately centered and" kept centered relative to the mold during the operation of the mold, totheend ofproducing a perfectly round casting Whichis uniformly chilled circumferentially of the' casting. My improved casting-centeringmeans (see Figs 1, 2, 3,54, and 5), constituting a valuable portion of :ny-present invention, com-- prise horizontally movable feasting-center`` ing members M which are' mounted on thev chill-sections E andvconsequently rest 4on the chill. are spaced`and ext-end circumferentially of Said casting-centering members M the chamber C at` the upper endLof said` chamber and are vmovable horizontally and radially'of the chill. `Said casting-center- I. ing -members are normally in their outer position and arranged to move .inwardly into the chamber C. Each casting-centering member-is provided at its chamber-fac-'- ing side with several laterally and in yvardly projecting lugs 53 which, as shown inzFigs.

` l, 2*, 3, 4, and 5, are spaced"circumferenti'ally of tliechamber C.- C Said lugs 'inthe outer and normal position of said casting-centering members, as vshovvn in Figs. land 2, are flush atltheir inner ends With the internal' surfaces of the adjacent portiono f the chill and participatein the -formationof the sur rounding Wall ofthe chamber C. The porcope. "'lfreferably' each .lug 53 hasoppos'ite -sldes thereof converging downwardly, and' adjacentyedges of adjacent casting-centering. members M lare. preferably y beveled,l as

at 54,1and .face upwardly, as' shown in Fig.

tends, as at 55', betweenand 'covers said edges of said casting-centering` mem-bers.' -By the Il, `and the'sand-body 4lbf thecope" eXf provision of the casting-centering members y "With the peculiarly shaped lugs 53 herein- `before de s'cribediand the spacing of said lugs circumferentially of the chamber C and the extension ofthe sand-body 15 of the cope bevtween adjacent lugs-of each casting-.centering member, my improved casting-centering jmeansis rendered adequately positive, and

"detrimental chilling of the casting formed in the mol-d vbythe`castingfcentering means T Each casting-centeringgmember M has tWo laterally and-outwardly projecting arms m l "which are spaced lcircumferentially of the tion .of` a vcasting formed in 'the mold the chamber C, and a 1aterally boWable leafsaid'casting-centering member and overlaps lthe `outer.' end-faces of said'arms and in the outer' and normalY position 'of said casting-v `centering member extends straight bet-Ween 'said arms', as shown in Fig. 4, which spring isattached to or operatively connected With vsaid armsfi'n any approved manner and said' 'fspring rests at lts lower edge on a lug 27 of 'the body Dv of the chill, as shown in Figs. l,

2, 3,*and 5,- Which -lug therefore participates in supporting'said casting-centering member. ,Two vertically spaced abutments R .for the inner' side of said spring are pro vided, which abutments are 'arranged cenitrally between 'the arms connected toge'therbysaid'spring a'nd consist preferably `1 Vof.,two,,vertically 'spaced screws which are arranged horizontally and .substantially radiallyotheChill andA screwed' into an up- Wardly projecting member 29 of a lug 27 of fthe body D ofthe chill. Said abutments are therefore adjustable radially of the chill and have lpreferably such adjustment relative'to the adjacent spring that they shall ,engage `the inner side of said spring in the outer and normal position of' thecasting-centering member operativelyconnected .With said spring. Two abutments T for the outer side of said spring are provided, Which abutments are spaced longitudinally `of the springand substantially 'eqpidistantly from opposite ends respectively of the'spring. The outer abutments T for said spring are arranged between the arms mconnected together by said spring-'and the inner'abutments B for said spring are arranged centrally between and equidistantly from said outer abut-- mentsl The outerl abutments T for said spring preferably comprise two screwsl I would'here'xremark that the arms 'm .'o-

the castinglcentering members M possess enough springmes'sflto lrender them capablel of yielding to thefconnjectedvspringQ, during the lateralA and 'outward bowing of' saidl springs, andntwill be observed that the r inner abutments R Jfor said springs, during t-heoutward' movement of said abitm'ents,

with the lateral and outward expansion -o the chill by heat during the horizontal contraction or cooling of the casting, bow said springs outwardly between the outer abutments T for the springs, as shown in Fig, 5; thats'aidl outer abutments T resist the lateral and outward bowing of the springs from end to en d and thereby cause the'endportions of thesprings to move laterally and inwardly and thereby actuate the casting-cen- ,tering membersMinwardly intothe chamber C to keep the casting accurately centered during the horizontal contraction or cooling o the casting; that the inner abutments R orthe springs, move laterally and inwardly during the horizontal contraction of thechill afterl the. lateraland outward expansion ofthe chill by heat and thereby peri mit the springs to' return to their normal positionshown in Fig. 4,'and that obviously` the return of saidsprings lto their normal 40 position eiiects the return ofthe castingcentering members Minto their outer and:

normal position.-

It will be lobserved that bythe const-ruction hereinbefore described the passageway 43 employed in conducting a-heat-absorbing' medium is formed at one end of the mold and arranged externally of and out of communication with the molten-metal-receiving f chamber Gand extends. .to the exterior of 5c the mold; that a passageway or passageways 47 are formed at the opposite end of the mold and externally of and out of com'- munication with said chamber and extend to the exterior of the mold ;A that passageways 40 formed interiorly of4 the core of the mold between the central portion of` said core and the exterior of the'core are outl of communication with `the chamber C but placed in communication' with the aforesaid -pas- 6o sageways43 and 47 andspaced circumferentially of said central portion of the core; Y

"that the .valved supply pipey K constitutes means.V whereby a heat-absorbing medium maybe caused to pass through said passage- T ways that said heat-absorbing medium,

',upon 'opening the' valve of said supplypipe during the operation of the mold, is,

conducted to and through the core in proximity to the exterior of the core but without contact with the metal arranged next to 7o' and surrounding the core .during the operation of the moldL so asto -cool said letal without chilling. it'iurin'g the chilling or cooling of the`casting circumferentially andthereby prevent orbgreatly reduce contraction-'strains internally of the castingv and lproduce a cast-ing better tted to possess the requisite strength and abilityto successfully s withstand shocks and abuse. 'I would also remark that the portion'32 of the 'sand- 80 i4 body 15 ofthe cope is carried'by and -with the llugs 53 of the casting-centering members M, as-shown in ,ligs 3 and 5, during" the inward movement of saidv casting-centering members. g5

What Iclaim isj:--V

l. In a mold for making metal castings, the combination, with movable casting-centering members spaced ciroumferent-ially of yand normally' arranged to move inwardly 90 into the 'molten-metal-receiving chamber of (the mold, of'springs arranged to actuate the, casting-centering members, and means 'whereby the springs are caused to actuate the casting-centering lmembers inwardly95 during the cooling andvhorizontal contraction of t-he casting formed in said chamber. 2.I'n a mold lhaving a circular moltenmetal-receiving chamber,` the combination, with horizontally movable casting-centering members extending and spaced circumfer-Y entially of and normally arranged to move. inwardly `into said chambery'of springs ar- 'ranged at the outer sides of and operatively connected with the casting-centeringmembers, and means .whereby Ithe springs are caused to actuate the casting-centering members inwardly during the cooling .and horizontal contraction of the casting vformed in said chamber. 1 l

3.111 amold havihg a circular moltenmetal-receiving chamber, the combination, with horizontally movable casting-centering Amembers extending andspaced circumferentiallyof and normally `arranged to move inwardly into said chamber, each casting- Acentering member havingtwolaterally and y outwardly projecting arms which are spaced circumferentially of' thech'amber, of a laterally hbowable springjextending between fand connected` to s aid arms, and means wherebythesprmg 1s caused toaactuate the connected casting-centering member invwardly during the cooling and horizontal" contractionof the casting formed in said chamber. v Y

4. In a mold having a circular moltenmetal-receiving' chamber, the combination-,- withhorizonta-lly movable casting-centering members extehding andsspaced cir'cumferenf'130 nected casting-,centeringmember linwardly centering means tocenter the casting dl'lring the lateral and outward expansion of the during the cooling and horizontal cont-rac' tion of the 'casting formed in slald chamber.A

In amold 'for makinggmetal c ast'ings,

'the combination, with a vertically*arranged clnll participatlng '1n theformation of the,

molten metal receiving i chamber of the mold, and Acastingcentering means normally.

arranged tobe operated to'center acasting formed in said chamber, of springs for' ef-` fecting the'operation of said casting-centering means to center the casting' formed in. said chambery and .means .whereby the springs are caused to operatesaidqcastingchill by heat. l y l 6. ln a mold for making a'circular metal casting, the combination, with a vertically arranged chill participating the formation of the surrounding wall of the moltenmetalfre'ceiving chamber fof the mold, and

movable casting-centering members spaced circumferentially of and normallyrarranged 'I'toniove'inwardly into said chamber, of. springsl operatively connected withthe cas'tf. ing-centering members, and meansf'wherebyl `thesprings are--causedgto actuate th'e casting-centering members inwardly durin'gthe lateral and outward expansion'.` o f .the chill 7. In agmold formakingmetalavcastings the combination, with avertical'ly arranged chill participating in the formati-on of the molten-metal-receiving chamber ofthe mold, -and horizontally movable casting-centering members extending and spaced circumfer entlally of and normally arranged tomove inwardly into said chamber, of laterally fac.-

, y'.ingleaf-'springs arranged at the outer sides of the casting-centering members, and means whereby the springs are caused to actuate the casting-centering members inwardly the chill by heat. l y

' 8. In a mold for making a circular metal during the lateral and outward expansion of casting, the combination, withv afvertically arranged chill participating inthe formation of the surroundingwallbf the molten-v metal-receiving chamber'of the mold, -and horizontally movable *casting-centeringmembers extendmgand spaced circumferentially of and normally arranged to move `inwardly into said.jchamber, each castingcentering member. having two laterally and outwardlyprojecting .spaced'armsg of a spring operatively connected with said arms, and means whereby said spring-is caused to actuate thevconnected casting-cen'-` tering memberv inwardly during `vthe lateral 9. In, a mold for making metal castings,

the combination, 'withl 'a chillparticipating in the formation of the .molten-metal-receivl ing chamber of the mold, and movable casting-centering members spaced circumferentially of andnormally arranged to move inwardlyinto said chamber,of springs instrumental in actuating the casting,- centering Aand outward expansion of the chill by heat.

members inwardly and outwardlyvrelative bythe lateral and .outwardexpansion.ofthe chill Vby heat.g .'and having Ithe operation thereof for 'effecting the 'outward movement of the castinglcentering members after saidv expansion of the c hillcontrolled bythe con- "tfosaid chamber and having the operation. thereof for eifecting the `inward moijement of the casting-centering fmembers.controlled traction ofthe expanded cliilll' i j 1 0. a mold for making-metal castingjsv the'. comblnatlon, .with a vertically arranged -chillv participating 'in the formation of the molten-metal-receiving chamber of the. y mold, andv movable .casting-centering mem-A bers spaced 'circumferentially of and nor` mally arranged to move inwardly'into. said chamber, each y castingl centering member. ,having two laterally and outwardly proj ect-' ing spaced arms,l .of a ;1laterally "bowabler spring extending between andv operatively connected with said arms two abutmentsu men-ts arearranged betweenl said larms and4 spaced longitudinally of the springfandsup- 'for the Aouter side of the spring, .which abutported independently of lthe chill, and an abutment for the inner Vside ofthe spring, said last-mentioned abut-ment being carried by the chill iand arranged between and spaced fromI the first-mentioned abutments. A l1.' In a mold for making metal castings,

the combination, with avertically arranged y .chillpa-rticipating in the formation ofthe mol-ten-metal-receiving chamber of the mold, and movable casting centering members spaced circumferentially "of and normally arranged to move inwardly into said chamber, each casting-centering member having two .laterally and outwardly projecting ber, of a 'laterally bowable' spring extendJ arms spaced circumferentiallyof said chaming between and operatively' connected with said 4arms; twoabutments for the `outer side of the spring, which abutm'entsfare spaced longitudinally of .the spring and supported independently and adjustable substantially radially' of the chill, andan abutment for the inner side fof the spring, said last-mentioned abutment being carried by the chill '.andarranged between and spaced from the first-mentioned abutments,

l2. Ina mold for making metal castings, the combination, with a vertically arranged chill participating inthe formation of the molten-metal-receiving chamber of the mold, and4 movable casting-centering mem.- bers spaccd circumferentially of and normally arranged to move-inwardly into said chamber, each casting-centering member -having two laterally and outwardly projectingl arms spaced circumferentially of,I

said chamber, of a laterally bowable spring extending between .and operatively connected with said arms; two abutments for the outer vside'of the spring, which abut-I ments areI spaced longitudinally. of the spring and supported independently of the chill, and an abutment for the inner side of the spring, said last-mentioned abut-ment being- 'carried by and adjustable substantially radially of. the chill and arranged betweenand spaced from the first-mentioned abutments. f

13. ln a mold Lfor making metal castings, the combination, with a vertically arranged chill participating in the-formation ofthe molten-metalreceiving chamber ofV the mold, and movable casting-centering meme bers -spaced'-circumferentially of and nor` -mally arranged to move inwardlyinto said chamber, each casting-centering member.

having two laterally and outwardly projecting arms spaced circumferentially of said chamber, of a. laterally facing leafspring extending between and operatively connected with said arms; twoabutments for the outer side of the' spring, which abutments are spaced longitudinally of the spring andsupported independently ofthe chill. and two 'vertically spaced abutments for the inner side of -the spring. Said last#` mentioned abutments being ,carried by the chill and -arranged between 'and spaced from the first-mentioned abut-ments.

14. Ina mold for making metalcastings,

the combination, with a vertically arranged chill participating in the formation of the molten-metal-receiving chamber of f the mold,` and movable casting-centering -meIn-.

bers arranged-over and resting on the chill.-

and spaced and extending circumferentially of and normally arranged to move inwardly the combination, with a vertically arranged chill participating in the formation fof the -v molten metal receiving chamber of the mold, and movable casting-centering members spaced circumferentially of and normally arranged to move inwardly into said chamber,- each casting-centering member having .two laterally and outwardly pro jecting spaced arms, and a laterally facing leaf.- spring extending between and operatively Y'connected with said arms, of an abutment for the inner side of the spring,

which abutment is Icarried by' the chill and arranged centrally betweensaid arms, and two screws forming abutments for the outer side ofthe spring, which screws are spaced longitudinallyv of `the spring and substantially equidistantly` from opposite ends respectively of the spring and supported independentlyand arranged substantially ra ,dially of the gchill..

16. .In a mold for making metal castings, the combination, with .a vertically arranged chill participating in the'formation of the Amolten-,metal-receiving chamber of the mold, and movable castingfcentering menibers-'spaced circumferentially of and normally arranged to move inwardly into said chamber,- each casting-centering member having two laterally and outwardly proviecting spaced arms, and a laterally facing` leaf-spring Vextending between and operatively connected with said arms, of a screw forming an abutment for the inner side of the spring, which screw is carriedv by the "chill and'arranged substantially radially of the lchill and centrally between said arms, and two .abutments' for the outer side of the spg'mgsaid last-mentioned abutments belng spaced longitudinally of the spring and substantially equidistantly from opposite endsl respectively of the. spring and supported independently ofv the chill.

17. In a mold vfor making metal castings,

the combination, with a lower mold-part or drag; van upper mold-part or cope arranged above and spacedvfrom the drag to form .a

vchamber 'between the drag` and the cope,

which chamber has an inlet for the passage of -molten'met-al to the chamber; a vertically arranged chill participating in the' formation of the surrounding wall of said-chamber and being free to expand laterally and outwardly by heat independently of the cope and drag, andhorizontally movable castingcentering members mounted on the chill and spaced circumferentially of and normally arranged to move inwardly into said chamber. each casting-centering member having two laterally and outwardly spaced arms. of

a' laterally bowable spring extending" besp y Y jf'fwhich abutment is arranged centrally between said arms and carried by the and operatively connected with said abutment for the inner side of the" y l Aticallyarranged chill instrumental'in formchill, and two abutments' for the outerisidev of the spring, said last-mentioned abutmnts i I' being` spaced longitudinally of the spring and substantially equidistantly from opposite ends respectively of the spring and carried by the cope. 18. In a mold for making a circular castfrom the drag to form a chamber` between the drag and the copeand being rammed with a 'body of packed sand, said sand-body forming the top wallof the chamber; a ver# ing the surrounding wall offthe chamber, and suitably supported movable casting-centering members spaced circumferentially of and normally arranged to move inwardly `into the chamber, each casting-.centering member being provided at its chamber-facing side with several laterall vand .1nw-ardly projecting lugslwhich pardpatei'in the. formation of the *surroundingwall and` 4are spaced circumferentially lof the chamber, the sand-body of vthe cope covering and' extending between the -casting-centering" `..members, and the space between adjacent lugs of said casting-centering member being filled by a portion of said'sandlbody. v

19.l In a mold for making a circular Lcasting, a lower mold-part or drag; an upper mold-part'or cope arranged above and spaced from theI drag to form a chamber between the drag and the 4cope and being rammed with a body of packed sand, said sand-body l formi-ng the'top wall of the chamber; a verf tically arrangedchill instrumental in forming the surrounding wall of the chamber,

and suitably supported movable casting-cen tering members spaced circumferentially of and normally arranged to move lnwardly into the chamber, each castii'ig-centering member being provided at it-s'chambei'fac j ing side with laterally andinwardly` projecting llugs which, are spaced circumferentially of the chamber and participate in the formation of the surrounding wall of the chamber, thesand-body of the\cope covering and extendingl between said lugs and'b'etween adjacent portions of adjacent castingcentering members, each lugof each cast.

ing-centering member having its sidesconf -verglng downwardly. 1

Q0. In a mold `formaling metal castings,

a drag; aA cope-arrangedabove and spaced from the drag to form a molte-me'tal-receiving .chamber between` the cope and the drag and having a 'pouring-bas'inwhich is arranged centrally of the copeand in communication with said `chamber;a Acentral mold-part arrangedbet-ween the cope and the drag and instrumental in forming the `surrounding wall of' said chamber, andyan interlorly metal-reinforced sand-Core arf' ranged centrally ofthe chamber and having lng, a lower mold-part or drag; an upper l mold-partorcope'arranged above and spaced `10 top t0 bottom' of the lchamber and is contoured at its upper end to form/ia head saidsand-body upwardlyinto the headof said sand-body' andte'rminates at its upper end in a head arranged .within said head of said sand-body. 1

2l. In -a mold for-making end vofthe mold and externally offandl out sageway formed at the opposite lefndl'f thg' the exterjo'r'fof vthe mold; fa co through. said f charnbl'f-and'lfpr r'iq'rly betwee its central aortic y teriorwith assageway" Iwhich rr'anged externalygofland' out o commun' ,circumferentially' of` saidcentral-"portion f the` c ore,gand means whereby a'heat-absorb-V ing mediummay be said--passagew ays.` .a s N 22.A In 'a 'moldfor makng-metalicastnga a moltenmetal-receiving,chamber; fa drag pprovidedexternally? of'- and out of commu.-

lway for 'conductin'gz'a heat-.absorbing me` passageway which is arranged. .externally 'of ber and extends to the exterir ofthe mold; a core extending vfromtop. to'bottom ofthe chamber and provided [interior-ly between Asageways which are spaced 'circumferentially' 'of said central portion and extend endwise of the core, said'fpassageways in the core being out ofqc'ommlxnicaiion-with said chambei' `but placed in communication with th.' 'aforesaidpassageways in the cope and drag,- and `means whereby a heatabsorbing me-` through saidv dium -may be caused to pass passageway/s. 23. In a mold for making metal castings, Athe combination, with Aa drag;`a cope arr ranged above andspaced from the drag to forma molten-metal-receiving chamber bethe drag and Vinstrumental in forming-the surrounding wall of said chamber, and a mold and externally of and out*iffcomI r'i'iiiiiVl` cation with `said chamber and eiiterdiilg'to' n i, l tion wjthj `saidchamber but pla-ced in 'com munication .withf the -aforesaid passageways andv spaced and out ofcommunication with 'the cham#` its central portion an'd itse'xterior withpas' n asand-body 'whichextends vertically `from' forming th bottom of the. pouring-basin, said core having its interior metal-reim. 1- forcement 'consisting of a -metal'bar which is arranged-centrally of the core andjextends fronrwithin the-lower end 0f the afore- I metal castings, l a moltenfmetal-receiving chamber; a pas# sageway for vconducting a heat-absorbing medium, which passageway Y is formedf at onef- `of communication with said'clnamber'v andfeX-p 'l Atends (to, the .exterior offthe mold; afpas causeilto ypass"lft'hrough Y tween the' cope Uand the drag; a 'central-L '4 mold-part arranged between the cope andv les '15' u drag andy-having a pouringfbasinxwhich is c arranged centrally ofthecope and` in oom-v.

coref'arranged centrally o'f the chamber and extending vertically from top to bottomiof the chamber, of means whereby a heat-ao sorbing medium may be caused to pass ex- 5 ternally of and out of communication with said chamber through the mold from one end to ythe other end of the-mold and endwise through the core between the central portion and the exterior-of thecore and at points spaced circumferentiallyfof said central portion of the-core.

24. In a mold for making jmetalcastings', 'a drag; a' cope arranged above 'and spaced from.the drag'v to form a molten-,metall-re'- ceivingy chamber between the cope and the f -mun-ication" with saidj \chaf1 nber,`sa,id cope having passageways `which are out of lcommunication with :said chamber and spaced circamferentially O mthe pcuring-basin and 'extend tothe exterior of) the'-,mold; a cen-l -tralfmold'part arranged between the cope andthe drag-and instrumental informing the surrounding, wall of said` chamber; a core arranged centrally ofthe chamber and extending from top to bottom-of the cham ber and provided.. interiorly between-its cenpassagewayswhich extend cndwiseof the core andare out .of communication with said chamber but laced in communication at the upper endo? the core with the aforesaid assageways in the cope, and means where- 35 y a heat-absorbing medium may be caused to pass through said passageways.`

25. In a mold for making metal castings, a drag having a horizontally arranged plate at the bottom, which plate is provided interiorly Awith a passageway; a cope arranged above and sacedrfrom the drag to form a molten-meta -receiving chamber between'the cope and the drag; a central mold-part ararranged centrally of the cope and in communicationwith said chamber ;'a central mold-part arranged between the cope and Vthe drag and instrumental in forming the surrounding wall of said chamberaan interiorly metal-reinforced sand-core arranged centrally of the chamber and extending from .top to bottom of the chamber, which 27. In a mold for casting chilledcarwheels, a, central mold-part instrumental in forming the surrounding wall of the moltentral portionand the exterior of the core with ranupper inner -annular chilling portion core Yhas its interior metal reinforcement consisting of a metal bararranged centrally of the, core andextendinggfrom within the lower end into the npperend of .the core and provided-atl its upper end with laterally proentially ofthe bar, said core being provided between-the aforesaidbar and the exterior *of the core withvpassa'gewaysspaced circumferentially of said rbar fand extending longitudinally-of the core and placed in communication with the aforesaid .tubular members, andmeanswhereby a heat-absorbing medium may be caused to pass through said passageways.

metal-receiving'. chamberof the mold, which :chamber is enlarged diametrically at its l lower end, said mold-part comprising a'chill having a vertically arranged annular chilling body which has an internal surface participating in the formation of said wall ,and extending from the diametrically enlarged lower end of said chamber upwardly about half. the dista-nce between said enlarged end vof the chamber and the upper end of the chill, said chill also having an upper inner annular chilling portion which participa-tes in the formation-of -said wall and is formed independently of said body of the chilland tapers toward its upper end.

`saidlupper portion of the chill only having a part of its ,bottom in contact with said body. I

.28. In a mold for casting chilled carwheels, a central mold-part instrumental in forming the surrounding wall of the molten-I metal-receiving chamber of the mold, which vchamber is enlarged diametrically at. its

lower end, said mold-part comprising a chill having a vertically arranged annular chilling body provided internally of itsupper portion with an annular recess which extends circumferentiallv of said 'chamber and has a bottom provided with an annular depression spaced from and extending circumferentially of said chamber, said body having an' internal surface which participates lin. the format-ion of the aforesaid' wall and *extendsl from the aforesaid bottom downwardly to the diametrcally lenlarged lower end of said chamber, the chill also having which participates in the formation of said wall and is formed independently of the body of the chill and seated on said bottom between said chamber andthe aforesaid depression.

l29. In a mold for casting chilled car-` wheels, a central mold-part instrumental in forming the surrounding wall of the molten` metalfreceiving chamber of the-mold,which chamber is enlargedY diametrically at its Iac- 70 ]ect1ng tubular members spaced circumferestesa weer. end, Said,maapattmpnging a Chiu having a vertically arranged annu-lar chill-v tends". circumferentially of said] chainber,

said body having an internal surface'which participates Yin the formation' of the aforesaid wall and extends` fromy said recess downwardly tothe diametrically enlarged lower end of said chamber, the chill also "having anupper inner annular chilling por-v tion which participates intheformation of said wall and is formedindependently" of the body of' the chill and seated, on the bottom of said recess and has an unbroken .contact with said bottom, circumferentially of the aforesaid chamber, only-under the inner part of the bottom of said upperv portion of c the chill.

30. Ina mold "forcasting chilled car.- wheels,` av central mold-part instrumental in forming the surroundingwall of the moltenmetal receiving 'chamber of'the'mold, which f chamber is enlarged diametrically at its lower e'ndjsaid"i 4mold-paggcomprising` a nchillfhaving a vertically arranged annular chilling' body provided internally of its.

I -upper' portion "with, an annular recess which extends circumferentially 'of saidchainber andjhas a bottoni which is `,pr`ovided with'anv annularn depression arranged centrally of said'bottom and extending circumferentially of said chamber,.said body having. an in'y ternal surface" participating in the' formal tion1 'of theaforesaid wall and extending from said recess. downwardly to lthe diametrically enlarged lower end of said 'cham- `ber, said chill havingpan upper inner annular`chilling portion which participates' in 4'the formation of lsaid Awall and is formed independently of the bodyof vthe chill and seated on the aforesaid bottom' a'topposite sides of the depression in said bottom.

31p. In a mold for castingcar-wheels, a central mold-,part instrumental in forniing the surrounding wall of the moltenmetal-receiving chamber ofthe mold, which chamber is enlarged diametrically at its i lower end, said mold-'part comprising -a chill having a vertically arranged annular chilling-body` provid'ed' internally of its upper portion with an` annular v recessv extending circumfe-ren'tially of :said chamber,` said body,

having aniinternal surface participating in the formation of the aforesaid wall and extending from said recess downwardly to theA diametrically 'enlarged lowerend ofl said' chamber, the chill also having an upper inner annular chilling `portion.which participates 'in the formation of said` wall and" is formed independently of theu'bodyof 'the chill and f seatedofn thefbotto'mof said re-` cess, and means forpreyenting displacement 'of said upper portionof the chilllupwardly from said body of the Ichill, said means be-- ing arranged externally and accessible at the upperend of said upper portion'of` the chill..y

32. In' a `mold for casting car-wheels, a centralmoldLpart instrumental' informing the surrounding :wall fythe molten-metal-refl 'ceiving chamber of the mold, whichL chamber is enlargedE diametrically -at its lower end, said mold-particomprising a chill hav-1 inga vertically arranged annularchilling -body provided internally of its upper portionlwith an annular recess .extending circumfe'rentially of said chamber, said' body having an internal surfaceparticipating in the formation o fsthe aforesaid-wall and extending from said recess downwardly to the diametrically enlarged lower end4 of said chamber", said `chill having an upper inner lannular chilling ,portion which participates vin the formation .of saidwall and is formed independently' of the body of thechill and [seated onand clamped to the bottom of the aforesaid vrecess,` l

wheels a central moldpart.- instrumental in 'forming the surrounding wall'of the moltenmetal-receiving chamber of the mold, which 'chamber isenlargeddiametrically at'its lower end', said mold-part comprising a ,chill having a vertically arrangedfannular chillingbody v which has an'internal surface participating in the formation of said wall and 'extending 33. In a moldl for casting "chilleddcarl att :upwardly from. the diamet-rically enlarged chill having a vertically arranged annu ar chilling' body which has an internal surface participating inthe formation of said wall' and extending upwardly from the diamet- -rically enlarged lower end ofsaidchamber, said chill also having an upper annular chilling portion which is composed of suit.

ably supported `sectionswhich participate in the formation of said `wall and are arranged substant-ially radially relative to said chamber and reduced in' thickness toward. their upperI extremities.

tao'

35. In a mold for cast-ing chilled ycarl -wheels, a central mold-part instrument-al inf' v,forming the 'surrounding wall of the ymoltenmetal-receiving chamber of the mold,.

which'chamber is enlarged diametrically at its lower `end, said mold-part comprising a i chillv having a vertically arranged annular vchilling body which has an internal surface participating in the formation of said wall and extending from the diametrically enlarged lower end of said chamber upwardly about half: theV distance between said en larged end of the chamber and the upper end of the chill, said chill also having an upper inner annular chilling portion which is composed of sections which participate'in thefformat-ion-of said Wall and are seated' on the body of the chill and arranged substa'n'tially radially relative to said chamber and taper upwardly in cross-section.

' 36. In a mold for cast-ing chilled carwheels, a central mold-part instrumental in forming the surrounding wall of the mol` tenmetal-receiving chamber 0f` the mold, which chamber is enlarged diametrically at its lower end,l said moldrpart comprising a chill havingv a vertically .arranged annular chilling body which-has an internalsurface participating in the formation'of said wallv and extending upwardly from the diametri-l cally enlarged lower end of-said chamber,

. .125 said chill also having an upper inner annufffflar chilling portion which is composed of Sections which are mountedlron the aforesaid bodyand participate in the formation l ofthe aforesaid wall and are arranged Substant-ially radially relative to said chamber but removably secured in place on said body.

37.1n a mold for casting chilled carwheels, a central moldpart instrumental in forn'iing the surrounding Wall of the molten-meta'i-receiving .chamber of the mold,.

. `which chamber is enlarged diametrically at its lower end, said mold-part comprisingv a` chill having a vertically arranged annular chilling body which has aninternal surface 4 participating intheformation of said wall andv extendingupwardly from the diametrically enlarged lower end of said chamben4 said body being provided internally of its upper portio n with anAan-nular recess, the\ -4l5 chill also having an upper inner annular chilling portion which 1s composed 'of sec-A tions which participate in the 'format-ion of `said-wall andare arranged radially relative tosaid chamber and seated and removably, 1:50 .secured to the bottom ofthe aforesaid recess.

38. In a 'mold :for casting chilledv carlwheels, a central`rnoldpart -comprising a chill havinga verticallyarranged annular chilling-body participating .l in the formaytion of the surrounding wallof the molten- "-'metal-receiving lchamber ofs.,tlie.. mold, .said

. chilll alsofhaving kan upper inner annular chilling portion which 1s composedof sections which ar`e seated On-said body and ar- 60 ranged substantiallyiradially relative to and extend circumferent-ially of @said chamber,

which sections participate inthe formation of the aforesaid wall and' are provided at .wardly projecting flanges a member resting tion of the-'aforesaid Walls and are' 'vided at their lower ends with laterally and their' lower ends withl laterallygand' out.

on said flanges and extending circumferentially of the upper inner annular chilling portion, and means'for preventing upward tending member... Y

39. In a mold lfor displacement of saidA circumferentially ex- 1 53:7()

castmg chilled car??- wheels, a central mold-part comprising av chill having a vertically arranged annular chilling body participating in the formation of the surrounding wall of the moltenmetal-receiving chamber of the mold, said chill also having an upper inner annular chilling portion which is composed of sections` which are seated on said body and arranged substantiallyfradially relative to and `extend circumferentially of saidchamber, which sections participate in the formaproo utlv'qvardlyY projecting flanges, said clamping ring resting on said lianges and extendingk horizontally acrossv the outer sides of said M sections, and -mea-nswherebysaid ring is clamped downwardly-against said flanges. at). In a mold' for casting chilled car' `ing plates spaced circumferentiallyof and extending over said clamping ring andse- 'cured to the body o f the chill, Wluch plates clamp said ring to said flanges.

41. 1nAv a mold for casting chilled car- .wheels, a central mold-part comprising a chill having. avertically arranged annular chilling body participating 'in the formation of the surrounding wal-lof the molten-metalreceiving chamber of .the mold, said body being provided. internally of its upper 'por- .tion with an annular recess which. is con centricl relatlv'e to said chamber, said chill' "loof having an upper innerannular chilling' i orltion'vi'rhichispcomposed-Hof sections w ich are seatedon the bottom of ysaid recess,

which sections are arranged substantially radially relative to andextend circumferentially of said chamber and participate in the formation of the aforesaid wall, and means whereby, said sections Aare clamped to the bottom of said recess.

42.1n a mold vfor `casting chilled icarwheels, -acentral mold-part comprisingv a chill having a vertically arranged annular4 chilling participating the formation I of the 'surrounding' Wallof the molten-metallar chilling receiving chamber-of the mold,

said. body being provided internally of its bottom provided With an annula'rdepression arranged centrally f said bottom and extending` circumferentially of said `chamhavmg 'an upper inner annuber, said chill portion composed of sections Y which are seated on said bottom at opposite sides of said depression, Which sections .par-

ticipate in the format-ion of the aforesaid Wall andare provided attheir lowerends outwardly projecting yvith laterally and upper oportlon with an annular recess which 1s con-* centrlc relative to Said chamber and has lts flanges,

yto bottom of the flanges and in communieationwith the aforesaid depression 5v a clamping ringrestin'g. on sai flanges and extending horizontally across thel outer sides of said sections, and means whereby said clamping ring is clamped downwardly against said' flanges. v

In testimony whereof, I sign the foregoing` specieation, in the pre'senceok ,twov

Images