US1279650A

US1279650A - Die-casting machine.

Info

Publication number: US1279650A
Authority: US
Inventors: George Waldemar Bungay
Original assignee: ACME DIE CASTING CORP
Current assignee: ACME DIE-CASTING Corp; ACME DIE CASTING CORP
Priority date: 1917-04-20
Filing date: 1917-04-20
Publication date: 1918-09-24
Anticipated expiration: 1935-09-24

Description

G. W. BUNGAY.

DIE CASTING MACHINE. APPLICATION FIILED APR-20. 1911.

' 1,279,650. Patented'Sept, 24,1918- 4 SHEETS-SHEET I.

l/VI/ENTOR A TTOR/VEY G. W. BUNGAY. DIE CASTING MACHINE.

APPLICATION'HLED APR.20. I917.

Patented Sept. 24,1918. D

6. w. BUNGAY. DIE CASTING MACHINE.

APPLICATION FILED APR- 20. I917.

Patented Sept. 24, 1918.

ATTORNEY G. W. BUNGAY.

DIE CASTING MACHINE; APPLICATION FILED APR. 20. p917.

' Patented Sept. 24, 1918.

l/V TOR A TTOR/VEY 4 SHEETSSHEET 4.

I20 1 4 in the molten metal of various'working arts, such as pistons and valves, and thereore a moreparticularobject of'my present "invention is to construct aneffective" die-.

GEORGE- WALDEMAR suite/av, oFnaooKLYiv, W-roan, jnssr'e ronl'ro acmn nmcnsrme conrommou, A conrona'rroiv ommw Yonx,

,To all whom it may concern:

Be it'known that I, GEORGE WALnnMAn .FBU'NGAY', a" citizen of the United States, re-

fp rovements. in Die-Casting Machines, of

l which the following is a specification, reference being had'therein tothe accompanyin' drawings forming part thereof.-

'f y invention relates to die-casting vIna-- chinesyand has for its genera'lobject the production of-a machine which will success;

fully cast aluminum and other similar metals {which heretofore have, given trouble in forming into castings under pressure; 1 knowniasidle-castmgs. A serlous'source of I 'troublefin'casting aluminum and the like by means of die-casting machines as heretofore commonly constructed has-been the location casting machine which has no'pistomf valve -:or the like located. in the molten metal.

--.Other objects and advantages of my invenftion'willhereinafter a peanz My-pres'ent invention includes a movable pressure chamber or casting pot. provided I with a duct-terminating" ina nozzle adapted to besubmerged below the'surface ofthe:

l t' ialto be cast so as to permit such ma:

i of parts. as' -will appear from the following, "if p i V w I shall-nowdescribetheme-casting ma-" terial tofflow in-to the pressurechamber: throughgthe nozzle," this nozzle providing "jth'e onlyTinlet-by which such material may -"enterthe pressure chamber, means-being' -i provided for then raising the nozzle to cast-.

11% position above the-surface of-the mate-1.-

1'18. and means for admitting s'uitabl'e pres- 4 "sure fiuid,-'such'as' compressed air, int'0 the 4 i pressure-chamber for forcingout thematef. .firialthrough-the nozzleand jinto a' die or moldfi. My invention. also. includes various features of constructiongand combinations.

chine embodying my "invention illustrated 'inthe accompanying. drawings and shall thereafterpoint-out myfinvention in claims; I

4 :L'Figurel 'is'a side elevation. ofthe comforming.the-SI b ect-Qf myv application for Specification oi Letters Patent.

ew York,

pressed air Fig.- 8 isfa perspective view of the operatopenthe die.

' Patented Sept. 24,1918.

Application filed M11120, 1917. Serial No. 163,406.

plete machine as it appears at rest'. in the idle condition, parts bein'gbroken away to 1 show thes'ubmerged position of the nozzle of the dipper, or pressure chamber;

Fig. 2 is a vertical longitudinal central sectio'iiof the complete machine with parts thereof-shown in the casting position.

Fig. 3 is a partial vertical transverse section on a'plan'e indicated by the line 3-3 of. Fig. 2 as viewed from theleft and shows the latching device for locking the dipper or,"

pressure chamber-rat the casting position.

Fig. 4 is a plan of the complete machine as it appears in Fig. 2.

F g. 5 is an enlarged horizontal section taken on the line 55 of Figs. 1 and Gas :viewed'from'above. and llustrates the valve device in @control of the supply. of comdi' per. J r

ig, 6 is a vertical section longitudinally of the machine on a plane indicated. by the line 6'6of Figs. 4 and 5 as viewed from below and of Fig. 7 asviewed from the left.

Fig. 7 is a'vertical section transversely of the machine on a plane indicated by the line 7-: 7 of Figs. 1 and 6 as viewed from the ing means, appearing in Figs. 1 and 4', for

p1 oyed'.to raise andlower' the nozzle. of the dipper or pressure chamber and to close and Fig. 10 is a'partial verticalsection longi- 7 for the pressure chamber or tudinal-ly of the machine on a plane indicated by theline 1010 of Figs. 4 and 9 .as viewed from below.

Fig; 11 is a partial horizontal section simi-- 1ar-to -Fi .,9;on -a"-plane indicated by the line 1l l1 of Figs 1 and '10. i

"Exceptingfasto the features involvin the resent invention, the die-casting mac ine allustrated in the accompanying drawings is generally of a construction similar to that Q i p 1,279,650 v patent for casting apparatus filed October 5,

117,596. The two above noted applications contain claims, respectively, for the general construction of the machine illustrated in the accompanying drawings and for the con trolling means employed and also illustrated in the accompanying drawings.

The die-casting machine illustrated in the accompanying drawings as an embodiment of my invention has a usual furnace or fire box 1 in the upper part of which is located a receptacle for the material to be cast or melting pot 2 of substantially usual construction and arrangement. A curved casting pot or pressure chamber 3, which is shown as resembling the shape of the capital letter J, dips into the molten metal contained in the melting pot 2. The pressure chamber 3 is provided with an upwardly curved duct 4 which terminates in an upwardly directed nozzle 5 which in the inactive or non-operative condition of the machine illustrated in Fig. 1 is submerged below the surface of the molten metal in the melting pot 2, but which in the casting position in theoperation of the machine as illustrated in Fig. 2 is located above the surface of the molten metal and is shown as raised just above the edge of the melting pot 2. The.

main part or body of the pressure chamber 3 at the end thereof opposite to'the nozzle.

cross-piece 6 which may be formed integral with the pressure chamber 3 and which at its opposite ends is provided with trunnions 7 pivoted in bearin s 8 which are supported upon the top of the furnace or fire box 1. The pivoted trunnions 7 provide for rocking the pressure chamber 3 back and forth between the submerged position of the nozzle 5 appearing in Fig. 1 and the exposed or casting position of the nozzle 5 appearing in Fig. 2. In the lowered position of the nozzle 5, appearing in Fig. 1, the molten metal contained in the melting pot 2 willfiow into the pressure chamber 3 through the submerged open nozzle 5 and duct 4, and in the position of the nozzle 5, appearing in Fig. 2, molten metal contained in the pressure chamber 3 maybe ejected or discharged therefrom through the delivery duct 4 and nozzle'5 into a suitable die. It will be noted that the nozzle 5 of the pressure chamber 3 is raised only slightly above the surface of the molten metal in the casting operation, so that the nozzle 5 will at all times be substantially of the same temperaturea-s the molten metal in the melting pot 2. It will also be noted that the pressure chamber 3 acts as an auto matic dipper for dipping up charges of the molten metal from the melting pot 2 through the same opening in the nozzle 5 through which these charges are afterward delivered 'or ejected into the die, there being no sep-.

arate inlet opening and consequently no troublesome valve Working, in the molten metal. The upper or out-er end of the body of the pressure chamber 3 is closed by means of a head 9 and the head 9 is shown as having therein a port 10 to which is connected through the delivery duct 4 and out ofthe so It will be noted that j nozzle 5 into the-die. k v the pressure chamber 3 has therein only two openings, one of these being the nozzle opening for theingress and egress of the molten metal, and the other being the opening 10 for the admission and exhaust of compressed air to act upon the molten metal contained in the pressure chamber 3. The means for operating the die and for controlling 'the compressed air will be hereinafter described.

Fluid pressure means are provided for rocking the pressure chamber 3 between its. two positions, and such operating means for the pressure chamber 3 will now be described. The upper part of the body of the pressure chamber 3 above the top of the melting pot 2 is provided with a rearwardl'y extending operating arm 12 shown as formed integral with the pressure chamber 3. The operating arm 12 of the presm5 sure chamber 3 is connected to the upper end of a vertical piston rod 13 which carries at its lower. end and is operated by .a double-acting piston 14 in a cylinder 15 The .110

located at the rear of the fire box 1. cylinder 15 is shown as having a separable upper end or head 16 from which this cylinder is supported by means of a bracket arm 17 extending from the head 16 and secured to the top plate of the-fire box 1, as. clearly appears in the drawings. Steam is admitted to or exhausted from the upper and lower ends of the cylinder 15 through upper and

lower steam pipes

18 and 19. The means for controlling the steam supply -for the operating. cylinder 15 will be described hereinafter. It is only necessary to note now that when steam is supplied to the cylinder 15 through the" upper steam pipe 18 and exhausted through 12 5 the lower steam pipe 19, the pressure chamber 3' will be rocked from the filling position thereof appearing in Fig. 1. to thethrough the lower steam pipe 19:and ex hausted throu h the upper steam' pipe 18,

the pressure amber or dipper 3 will be returned from the casting ;in Fig. 2 to the inactive or osition shown illustrated in Fig. 1.

Lockin ;means are provided for' rigidly --holding t e pressure chamber 3 at the castcasting operation;

ing position shown in Fig. 2 so thatit will be able unyieldingly to resist the downward pressure'of the die n on the nozzle 5 in the (Fhis locking-device for the pressure chamber 3 comprises a latch 12 as this arm descends. The atch hook 20' the path of the descending operatingarm 12" 80 and the arrangement is such, as will be. clear hook-20 pivoted upon a stud 21 carried by the cylinder-supporting bracket 17' a t th e rear of the fire box 1 and shown as pro ect- .ing from its supporting stud 21 1 diagonally upward into the path of'th'e'o crating arm is pressed toward the engaging position by the weight of a tprojectmgrbent lever .22 which is employe for'manually disengaging the latch hook 20 from. the operating;

arm 12 when this arm isto be raised-for depressing thenozzle 5. 7 As the nozz1e\5 is raised from the submerged filling position shown in .Fi 1 to'thecastin position ape peering. in ig. .2, the latch ook 20' is m from the drawings, particularly Fig. 3, that the downwardly movin arm 12 will push aside the hooked end the latch hook 20 and will beautom'atically engaged therewith when the operating arm 12 has reached its limit of downward movement for raising the nozzle 5 to the casting position, as is clearly illustrated inFigs. 2, 3 and 4 ofthe drawings. It will now be clear that the nozzle 5 of the pressure chamber 3 will.

thus be positively. locked ainst downwardmbvement without any re iance upon the pressure of steam within'the operating cyl- 1 nde 'r 15. When the c'asting'operation ,is- 7 completed the latch hook 20' is -released. or.

disengaged by an attendant, standing at the [back of the machine, who'is commonly *em-.

.ployed anyway for erformin' other. duties,

. such as wiping ofi t e die'an taking away 7 the ,finished castings. When; the pressure "j chamber" 3 has been, as above described,

locked inthe casting position,it becomes for p the time being and during the castingl operation a stationary metal 'containing amber, the nozzle 5;of which is just above the surface of the molten metalcontained in the meltin pot 2.". a After the pressure chamber T3 has. e'nthus brought'to the casting position, the die is "next broughtto'the' cast; inggpositlon and clamped upon the nozzle 5, and the-parts of the machine ior 'doin-gthis resemblein Ia ggpleral Way, corresponding v v ac e pforming thesubjec't' o my hereinbefore mentioned application for-- parts of the m patentsio casting I apparatus, Serial No.

I ling position,-

be described.-

54,123,"filed October-E5, 1915, and will now- The die is shown as comprising two-rela- 'tively

movable members

23 and 24. each of which has a recess 25.invits lower edge so The inlet port 26 registers with the opening formed by. the nozzle 5 for the admission of the molten metal directly from the nozzle 5 into *the die. Y Also it is to be noted that the nozzle 5 .of-the pressure chamber 3 rises from completesubmergence to the position for, casting which is only just above the surface 0f the molten metal inthe melting pot 2,

so that the nozzle 5 andthe metal therein are at -all. times kept hot so that the molten metal Wlll freely flow. a

located that when the die members 23 and g 24 are together in the position for casting f the recess 25 fits over the nozzle 5.: An inlet port 26, shown as formed by a groove in the surface of each tie member, leads from the recess25 to the inside of the die.

. The means for supporting the die mem '

bers

23 and 24 and for moving them relatively'to each other and to the nozzle {5 will now be described. A frame 27 is shown as box 1,. and extending from, this frame are two horizontal parallel rods 28, one at each side of the machine, the outer ends of these rods 28 being shown'as provided with a supformed integral with the top plate of the .fire

1port29. ,On eachfofthe rods 28 and adjust.-' f

ablelongitudinallgrthereof is a split bearing 30 which maybe means of a clamp bolt 31 (see Fig. 1); To

' mly clamped in place by facilitate the adjustment I cfthe bearing block 30, gear teeth forming racks 32 are provided along the lower side of the rods ion 33 carried by a transverse shaft 34-. w ich An operating cylinder'37 for the die is provided on its lower side with .a-p'roje'ctingorting' lug 38' which is located between bymeans' of a trunnion shaft 39 about which s pra v r the caring blocks 30a'nd is pivoted to them theoperating c linder 37 together with the parts carried hereby may rock as 'a pivot. The die-operatlng cylinder 37 is arranged longitudinally of the machine and at its end nearest tox the melting pot 2 and nozzle 5 has a head 40 from which rigidly project 1 four rectangularly arranged parallel rods 41 125 which extend back over the melting pot 2.

The outer or projecting" ends of the rods 4 1v supportfa d1e head 42*which may be adjusted along the rods 41 by means of nuts 43. The

die 'mei'm'ber23 is secured to and; supported this diehead 42. The nuts 43 provide for the independent adjustment of the die head 42 together with the die member 23 carried v thereby.

A second die head or die carrier 44 for the other die member 24 is slidably mounted, by means of bearing sleeves 45, upon the longitudinal guide rods 41. The die carrier 44 carries two vertically arranged spaced projecting plates 46 which upport the die member 24. The slidable die head or die carrier 44, together with the guide rods 41 and die head 42, is supported by means of two vertically arranged side bars 47 which pass through hearings in and are guided by the bearing sleeves of the die carrier 44. The upper ends of the-vertical supporting bars 47 are connected together by a crossbar 48 which, at a middle point-thereof, ad-

justably supports the die carrier 44 by means of a depending adjusting screw 49 which providesfor the vertical'adjustment of the die heads 42 and 44 relatively to the nozzle 5, so as to accommodate dies of vari ous sizes. The lower ends of the vertical supporting bars 47 are connected by a cross shaft 51 which is provided with a flanged roller 52 adjacent to each of the bars 47. The rollers 52 are adapted to travel in gu-ideways formed by means of slots 53 in the frame 2?, these, roller-guiding slots 53 being shown as extending longitudinally and as slightly inclined downward toward the the box 1, as clearly appears in the drawings. The rollers 52 and inclined guideways' 53 perform the important function of clampingthe die

members

23 and 24 firmly upon the slightly projecting nozzle 5 in the hereinbefore described locked casting position of the latter, as appears in Figs. 2 and 4 of the drawings, this clamping function being performed when the die carrier 44 is operated to slide along the guide rods 41 and to move the die members 24 up to the die member A second function of the rollers and gnideway 53 to raise the a

die members

23 and 24 away from the nozzle 5 and above the melting pot 2 when the

die members

23 and 24 are moved apart by the sliding of the die carrier 44 in the opposite direction upon the guide rods 41', as appears in Fig. 1 0; the drawings. These two unctions of the rollers 52 and guideways 53 .will presently more clearly appear in connection with the description of the means for operating the die, which will now be given.

The die carrier 44 is operated in its sliding movement on the guide rods 41 by means of a piston rod 54 connected thereto and to a double-acting piston 55 in the die-operating cylinder 37. Steam for operating the piston 55 and the parts connected thereto is admitted to the cylinder 37 through

steam pipes

56 and 57 connected to ,oppositeends of the cylinder 37 and is exhausted through the same pipes. It will now be evident that when steam is admitted to the cylinder 37 through the pipe 56at the right end thereof,

as the machine is illustrated in they drawings,

the die member 24' carried by the slidable die head or die carrier 44 will be moved up toward and against the die member'23 carried by the other die head 42, and at the same time the rollers 52 traveling down the inclined guideways 53 will bring these closed--- together die

members

23 and 24 down upon the firmly positioned locked nozzle 5 and will securely clamp the die to the nozzle 5,

the rollers 52 in this clamping action bearing upon the upper surfaces of the guideways 53. When steam is admitted tothe cylinder 37 by the pipe 57 at the left end of the cylinder 37 as the machine is shown inthe from the nozzle 5 and toe point above themelting pot 2, as appears in Fig. 1, this raising of the

die members

23 and 24 taking place as these members are separated by the sliding of the die carrier 44 toward the dieoperating cylinder 37, as will be readily understood. In view of the fact that the molten metal is fed to the die under pressure,

it is very important both that the nozzle5 of the pressure chamber 3'shall be firmly locked in place and that thei die shall be securely clamped to the nozzle 5. l

The die-casting machine illustrated in the drawings is so arranged that the pressure chamber 3 is first rocked to raise the nozzle 5 and lock it at its raised casting position, where it is heldwhile the

die members

23 and 24 are operated to close together and .be clamped upon the nozzle 5. Next the molten metal is forced from the pressure chamber 3 After this the

die members

23 and 24 are un clamped,.separated and elevated to release the casting, and finally the pressure chamber 3, after it has been unlocked, is rocked to again submerge the nozzle 5.

The casting, which is carried by the die member 24, is ejected therefrom by means of ejector pins 58 shown as projecting from a plate 59 carried by ejector" rods 60 passing through and guided by the die carrier 44. Upon the movement of the die carrier 44 toward the operating cylinder 37 the free ends of theejector rods 60 come in contact with abutment projection 61, carried by an abutment plate 62 shown as adjustably and 55 of the respective fluid pressure cylinthrough the duct 4 and nozzle 5 into the die.

llt

ders and 37, for successively operating the pressure chamber 3 and the

die carriers

42 and 44 in proper succession", as above. noted,

so that, starting'from the non-operative position of rest of the machine appearing in Fig. 1, the nozzle 5 of the pressure chamber 3' will be first elevated while the

die carriers

42 and 44 are maintained in the elevated and separated condition; and-so that these die carriers will be closed together and moved, downward into clamping relation with the? nozzle 5 during the time that this nozzle is maintained at the elevatedposition, as above noted; and so that. then, after the molten metal has been forced into the die, thedie

members

23 and 24 will be unclamped and raised and separated; and so that, as a final part of the operation after the makin of a casting, the pressure chamber 3 will be scribed to an extent necessary to make clear the operation of the machinevof the present invention.

Secured to the head of the die-operat-' ing cyl-inderw37- is a two-part casing comprising a cam chamber" 64 and a' valve chamber 65, which contain the valvesand the operatin more particu arly illustrated in Figs. 9, 10

and 11 of the drawings. The valve chamber 65 is shown as ofsubstantially rectangular shape, and one corner of this chamber, shown asxthe-upper right hand corner in Fig. 9, ispartitioned off to form' an inlet header or inlet manifold 66 which extends throughout .the.full length vertically of the valve chamber and to the upper end of which there is connected a steam supply pipe or inlet pipe 67 (see Figs. 1, 4, 9 and 10) In the opposite corner of the-valve chamber 65 diagonally from the steam inlet manifold '66 there is similarly partitioned off an exhaustv manifold or exhaust header 68 which also extends vertically throughout the length of the valvechambero65 and which at the top and frontthereof is, pro-.

vided with an exhaust pipe 69 (see Figs; 1,. i

forthe pipe 18" which admits steamlto thev .upper' end of the nozzle-operatm' cylinder 1 4, 9 and 10); The remaining irregular space within the valve chamber 65, is divided by artitions so as to {form'- three transverse a tier of four sma l chambers or

pockets

70, 71, 72 and 73 arranged vertically one above the other alongside of and between theinlet manifold 66 and e exhaust manifold 68, as most clearly appears in Fig. 10, these individual pockets being shown as numbered from the 4 top downward. Four

springpressed inlet valves

74,75, 76 and 77, ar

mechanism therefor, as is" 'Itisto ranged in a vertical seriesand shown as of the puppet ty e, are adapted to connect the inlet manifol 66 with there ective in-- dividual steam pockets 70, 71, 2 .and 73, 'I I and a similar series of exhaust valves 78,

79, 80 and 81 are in controlof communica tion between these respective steam'pockets and the exhaust -man1fold 68. Connected to .therespective individual steam pockets 7?, 71, 72 and-'73 are the respective pipes 5 56- 19 and-1'8, of which, as hereinbefore described, the pipe 57 is connected to the die-operating cyl nder 37 at the .left end thereof, the pipe 56 is connected to this cylinder at the right thereof, the pipe 19 is connected to the lower end of the pressureehamber-operating or nozzle-operatin cylinder 15, and the pipe 18 is connecte to the upper end of the same cylinder. 'It will now be evident that any one of these steam pipes may. be connected either with the steam inlet manifold 66 or with the exhaust. manifold 68 through its individual steam pocketvprovided' with an inlet valve and an exhaust valve as above described;

A cam mechanism now to be describedis provided for operating these valves. in the proper sequence ,or succession. A1vert1cal cam.shaft"8 2 is journaled in the cam champrovided with an operatingwheel' 83 from I Y ber 64 and at its upper end is exteriorly which there projects an'operating handle '84 i 7 (see -Figs. 1 and 4). The: inlet valve and the exhaust valve for each of the individual steam pockets 70, 71, 72 or 73 are operated to be opened alternately by means of the cams carriedby the cam shaft 82 and. act- I ing upon rock arms which engage the stems of the respective valves. .For example, the

steam inlet valve 74 for the pipe'57 which is connected to the left end of the cylinder 37 is operated by a cam 85 which acts upon a rock'. arm 86, as shown in Fig. 9, andv the pair; of valves, comprising an inlet valve and an exhaust valve for the

respective ipes

56, 19 and 18,; is similarly controlled y .a pair of cams acting upon a slmllar pair of rock arms;

a rock arm v90 to operate fthe inlet valve 77;

For example, there is .shown in- Fig. 11 a cam 89 which acts upon 15 for raising the submerged nozz' e .5 to the,

casting position, and. there is \also shgwn another cam 91 alongside of the cam & ;'on the cam shaft 82 and this. cam 91 acts-.ppon

an oppositely arranged ro'ck arm '92 foroperatmg the pipe 18.

be noted that the raised cam faces of the difle'rent cams. are longer or shorterexhaust valve 81'forthis same of the fact that the valve-operating cams are.

according to the length of time that the respective valves are requiredto be held open during the rotative valve-controlling movement of the cam shaft 82. The valve-controlling device illustrated in the drawings is constructed'and arranged so that a. complete operation of the die-casting machine is caused to take place during two half rota-- tions'of the cam shaft 82 which, so far as the operation of the machine is concerned, may be in thesame' direction of rotation, thereby to make one complete rotation of this shaft, or the half rotations may be in opposite directions, half way around and half way back again, and this is the manner in which the machine illustrated in the draw-- ings has been operated, the half rotations of the cam shaft 82 being manually imparted by means of the operating handle 84:, which is moved from the position appearing in Fig. 1. half way around to the position shown in Fig. 4 andback again, by an operator standing at the front of the machine. In view made in symmetrical halves, the operating handle 84: maybe moved in either direction,

around toward the front or. around toward the back, from the position appearing in Fig. 1, but it has been found most convenient in the operation of the machine tomove this handle through the front half of the circle, and the valve-operating action of the cams. will now be described in reference to such movement of the handle 84.

It will be noted that the cam 85 for operating the inlet valve 7 of the pipe 57 has an extended raised concentric'cam face and that the companion cam 87 for operating-the cor responding exhaust valve 78 has a short or peaked raised cam face. In thisconnection t 1 s'to be understood that the pair of cams 7 (not appearing in the drawings) for operatmg the inlet and

exhaust valves

75 and 79 1 the inlet valve 74. Likewise it is to be unrespectively for the pipe-56 leading to the other end of the operating cylinder 37, are complementary to the

cams

85 and 87 in that the cam for operating the inlet valve will have a short or peaked raised cam face,

. while the cam for operating the. exhaust .valve 79 will have a concentric extended cam face similar in this respect to. the cam 85' for her-operating cylinder 15, has an ex- .tended raised cam surface for holding open this valve during the casting operation, 7 while the cam 91 has'a short-or peaked raised cam surface, for opening the exhaust valve 81 for the upper end of the cylinder 15 at the positionof rest of the machine appearing Therefore, in the above noted complementary pair'ofcams (not shown) the cam for operating the inlet valve 76 the pipe 19 leading to the lower end of the" in Fig. 1.

cylinder 15, will have 'a correspondingly s ort or peaked raised operating face, while its companion cam for operating the ex haust valve for the pipe 19 will have an extended raised cam face.

When the operating handle 84 is rotated through a quarterturn or ninety degrees it will be noted that no change takes place 1n the position of the valves in control of the

steam pipes

56 and 57 of the cylinder 37 and that therefore the open and elevated position i of the die members 23 and 24: appearingin F ig.. 1 will be maintained without change during this movement. However, as will be clear from an inspection of Fig. '11, during thisquarter turn of the cam shaft 82, a. complete-change has been efi'ectedin the posh tions of the valves controlling the nozzleoperating cylinder 15, the exhaust valve 81- of the pipe 18 having been first closed by the peaked orshort-facedbamtl followed immediately by the opening of the inlet valve 7 7,0f this pipe the long or extended-faced cam 89. The complementary cams not shown have effected the reverse result as to the position of the valves for the pipe 19 leading to the other or lower end of the cylinder '15 and have closed the inlet valve 76 and opened the companion exhaust yalve 80'. It will now be clearly evident that the piston '14 in the cylinder 15 will be actuated and forced to the bottom of the cylinder 15, thereby to rock the pressure chamber 3' and raise its submerged nozzle '5 in the manner. hereinbefore-described.

As the operating handle 84 is moved through the remaining ninety degrees to the position thereof appearing in F ig. l, to complete the half rotation of the cam shaft 82, the position of the valves for the cyhnder 15 which actuates the pressure chamber 3 will not be changed, but the position of the valves for the die-operatingcylinder 37 will be com pletely changed, as will be clear from an in-i spection of Figs. 9' and 11, it being noted that the extended concentric raised cam. face of the cam 89 will maintain the inlet valve. 77 open while the corresponding. exhaust valve 81 will be kept closed by its operating;

cam 9l, and that now the cam '85 has closed the inlet valve 7491s the pipe 57 of the operating cylinder 37jland the companion cam 87 having the shorteam projection has opened the corresppndinig exhaust valve 78, while the comple'm same opened the iiitake valve 25 of the pipefifi camslnot shown have atthe g ha'ust valve 79 and leading to the other en ti the cylinder 37.. The piston 55 of the cylinder 37 will now be appearing in Fig. 1 to the casting position appearing in Figs. 2 and.4 of the drawings.-

In this position of the parts of the machine, compressed air is admitted into the body part of the pressure chamber 3 through the port 10 and .pipe 11, and forces the molten metal from the pressure chamber 3 out.

through the duct 4 and nozzle 5 and through the port 26.i nto the dieor mold'co'mprising the sections or

members

23 and 24.

When thecasting has'set the operating handle'84 is-reversed and brought back from the position appearing inFig. 4 to the orig inalposition appearing in Fig. 1; or, as

V hereinbefore noted, instead of reversing the movement of the. handle 84 its 'movement" could he continued in the same direction to complete the rotation andwith the same re-g 'sult. With the return of the operating handle 84 to its original position, as shown 7 in Fig. 1, all'of the valvesare again actuated but in the reverse order, as will be readily understood, so that first the die members 23.

and-24 will be unclamped and raised-from the nozzle '5 and thereafter the pressure chamber 3, which in the meantime has been" unlocked-by the attendant, will be rocked awayfrom the casting position tothe position of submersion ofthe nozzle 5, so that when the operating; handle 84 is at its orig mal position-appearing in Fig. 1, the operat-v ingparts ofthe machine will then have successively changed in the order recited from their position appearing in Fig. 2 to the position thereof shown in Fig. 1, "ready for the next casting operation.

' molten metal therefrom into the closed die will now be described. A valve casing 93 is The means for controlling the pressure fluid which is supplied through the-pipe 11 to the pressure chamber-3 for ejecting the supported bya plate 94 secured'to thetside of the fire box 1, as a pears in Fig. 1. The valve casing 93 has t ereinya middle chamber 95 to' which the pipe'll leading to the pressure chamber-Y3, is connected- Above this middle chamber 95 the casing '93-is rovided with an inlet chamber 96 to whic is connected a supply pipe 97 which may pro-.

ceed from a source of s'upply of any suitable 96 and {middle chamber or distributingchamber 95, and an exhaust valve 102 of the puppet t ype,'cl'osed by a spring 103, controls 1 communlcation between the middle chamber 95 and the exhaust chamber 98. The stems of the valves 100 and 102 project belowthe valve casing 93, and for opening these valves are adapted to be engaged by the respective arms of a two-arm rock lever 104 carried by a longitudinally extending rock shaftz105 which is iournaled in bearings on the su porting p ate 94, as appears most clearly in ig. 1'. The arrangement is such, as will be evident: from an inspection ofrthe drawings,

particularly Fig. 7, that one of these valves 100 or 102 will not be opened by the rocker 104 until theoth'er valve has been permitted to close. Normally the inlet valve 100 is 'imaintained' in closed conditionand the exhaust valve 102 is maintained open, so that there will be no fiuid pressure upon the molten metalcontained in the pressure chamber 3, such pressure, being only applied thereto when it is desired to force such metal y from the pressure chamber"3 into'the closed die. This condition of th'evalves 100 and to a stationary part of the .machine, the

suitable pressure flu' spring 106 being strong enough to overcome .102 ismaintained bv'mea'ns of a retractile hold, the exhaust val" e 102 open. ,The valves the valve-closing s'p ng 103 and thereby to and 102*are opgrated to close the exhaust valve 102 and to open the inlet valve 100 for admitting comdpre'ssed air, or other i into the pressure chamber 3 by means of a manually operated handle lever 108 which extends upward from the rock shaft and which 1s shown as forming'a continuation from the outer end of the rock shaft 105. To admit the pressure fluid to the pressure chamber 3 for forcing the molten metal therefrom into the die, the hand lever 108- is moved in a counter- -clockwise direction or to the left asviewed fromthe rightfin Fig.1, thereby to open the inlet valve 100 while the exhaust valve 102 remains closed, as appears in Fig; 7. After the molten metal has been forced into the die, the pressure "in-the pressure chamber 3i s'released before the unclamping of the

diet members

23 and 24 from the nozzle 5. To release the uponthe. retractile spring 106 will move this pressure of pressure fluid in the pressure chamber 3, it is only necessary to let go. of the handle-love 108 where-.

pressure fluid, such as compressed air. Be\lever to the right, "rotating the rock shaft 105 in a clockwise direction as viewed from low the middle chamber 95 the valve ca mg 93 is provided with an exhaust chamb r 98 which opens tothe atmosphere through an puppettype, closed by a spring 101, controls comml'mication between the; inlet chamber the right i'n -Fig.'1, thereby. oscillating the ,1 rocker\10 4 to pernut the inletvalve 100 to exhaust port 99. An inlet valve 100 of the,

close and also so as to open the exhaust valve 102 for the escape ofthe n'es'sure fluid from the pressure chamber 3 1; t t e pip-e u 7 to the atmosphere through the exhaust chamber 98 and port 99. Safety means are provided to prevent the admission of pressure fluid to the pressure chamber 3, excepting when the

die members

23 and 24 are securely clamped to the nozzle 5. This safet device comprises a U-shaped' away from its operating cylinder 37 to close together the die members and 24 and clamp them vupon the nozzle 5, the hand lever 108 may then freely pass the reversely pro1ecting free end of this guard member, as is shown'in Figs. 4 and 8 of the drawings. However, in the retracted position of the die carrier 44, in which the

die members

23 and 24 are separated and elevated above the nozzle 5, the hand lever 108 is engaged by the reversely projecting guard member 109, thereby'locking the lever 108 so thatrit cannot be moved to admit pressure fluid to the pressure chamber 3,,this locked position of the hand lever 108 being illustrated in .the drawings in Fig. 1. This locking arrangement prevents the possibility of operating the hand. lever 108-at the wrong time and thereby ejecting molten metal from the pressure chamber 3 through its duct4 and nozzle 5 at a time when the

die members

23 and 24 are not securely clamped to the nozzle 5, the guard 109 being so adjusted that it will only release the hand lever 108 in the casting p0- sltion of the parts of the machine.

The complete operation of the machine can now be readily understood and will be briefly noted. Starting'from the position of rest of the machine illustrated in Fi 1, the operating handle 84 of the whee 83 of the valve-operating cam shaft 82 is first moved through an arc of one hundred and eighty degrees, to the position shown in Fig. 4,

thereby to cause the successive lifting and automatic locking in position of the nozzle 5 and the subsequent closing together and clamping to this nozzle of the die members 23and 24, as above described, this being the casting position of these parts of the machine illustrated in Figs. 2 and 4. The hand lever 108, which has-been unlocked by the movement of the die carrier 44, ma now be moved to rock the rock shaft 105 or thereby admitting pressure fluid, such as compressed air, to the to of the pressure chamber 3, above the sur ace of the molten metal con tained therein, thereby forcing:-the molten" metal fromthe pressure chamber 3 ,throu' h its duct'4 and nozzle 5 into the moldor ie formed by the closed-together and "clamped die

members

23 and 24. After a brief period of rest,- for the sufiicient hardening or setting of the casting, the hand lever 108 is simply released, upon'which it is automatically re-' turned by the retractile spring 106, which, as above noted, is strong enough to overcome the valve spring 103, with the result that first the. supply of pressure fluid to the pressure chamber 3 is out 011 by the closing of the inlet valve 100 and immediately thereafter the pressure fluid contained in the pressure chamber 3 is permitted to escape or is;

trolling hand lever 108, the operating handle a 84 of the wheel 83 is brought back through a half rotation from the position illustrated in Fig, 4 to its original position, shown in Fig. 1, thereby, as above described, successively to raise and separate the, die members 23 and 24' and to lower and again submerge the nozzle 5 of the tippingor rocking pressure chamber 3 which, in the meantime, has been unlocked by the attendant standing at the back of the machine raising up the bent lever '22 of the latch hook 20. The machine is now ready for successive repetitions of this complete operation.

In this connection it should be noted that in making small castings the pressure chamber 3 will be found to contain enough molten metal to make several of these castings successively without the necessity of moving or rocking this pressure chamber to dip up more molten metal from the melting pot 2 through the nozzle 5, and in such cases the pressure chamber 3 may be'left lockedin the casting position durin several successive casting operations. T s result is accomplished by returning the operating handle 84 from the casting position, appearing m Fig. 4, through only nlnety degrees of its return movement, thereby to unclamp and elevate and separate the die members 23 and .24 without the rocking 'of the pressure chamber 3, which is maintained and kept locked at the casting position. From this half-way returned or ninety degree position of the operating handle 84, this handle is not brought all the way back to its original position ing position through the last ninety degrees of its one hundred and eighty degree are of complete movement. This will result in the die members -23, and 24 being again closed together and clamped upon the nozzle 5, for a second casting o eration without the nozzle 5 having been su mer ed between the casting operations, Suc casting operations without the clipping or submerging of the nozzle 5 may be successively performed so ut is reversed and returnedto the cast i long as there is sufficient metal contained in the pressure chamber 3, it being understood, of course, that, the hand lever 108, which is unlocked by the closing together and the clamping of the

die members

23 and 24, is rocked once for each casting operation.

It is obvious that various modifications in a nozzle vadapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, means for raising said'nozzle above the surface of such material, and means'for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material wlthin the pressure chamber and eject such material from the pressure chamber through said nozzledirectly into the die.

2. A casting machine hav'ing,in combina-. tion, a receptacle for the material to be cast,

a movable die, a'pressure chamber pivoted for rocking movement and provided with a duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means for imparting-rocking move ment to the pressure chamber for raising the nozzle above the surface of such-material, andmeans for supplying and admitting a fluid under pressure into the pressuecham her to act upon the material within thepressure chamber and eject such material 3. A casting machine having, in combinatlon, a receptacle for the material ,to be cast, amovable die, a movable pressurev chamber provided with a duct terminating in a nozzle adapted to be submerged below the surface of such material for I pressure chamber through said nozzle, said permitting such material to flow ,into the nozzle providing the only inlet for such material to enter the pressure chamber,

means for raising said' nozzle above the surfaceof such material, means for locking the pressure chamber in the casting position with its nozzle above the surface-of the material in the receptacle, and means-for sup-- plying and admitting a fluid under pressure into theipressure chamber to act upon the material withln the pressure chamber and e ect such material from the pressure chajngber' through said nozzle directly into the ie.

4. A easting machine. having, in combination, a receptacle for the materlal to be cast,

a movable die, a pressure chamber pivoted.

for rocking movement and provided with a duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providingthe only inlet for sure'chamber to act upon the material Within the pressure chamber and eject such material from the pressure chamber through the nozzle directly into the die.

5. A castingm'achine having, 1n combination, a receptacle for the material to be cast,

a movable pressure chamber provided with a duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow 7 into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material-to enter the pressure chamber,

means for raising said nozzleabove the surface of such material, movable die-su'pporting means, a die carriedby the die-supporting meansand adapted to receive directly] from the nozzle the material to' be cast, and means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die. p

, 6. A casting machine having, in combination, a receptacle for the material to be cast, a movable pressure chamber provided with a duct termmatingin a nozzle adapted to be, submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber,

means for raising said nozzle above the surface of such material, means for locking the pressure :chamber in the casting position therewith, such die being adaptedto receive directly from. the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of'the latter, and means for supplymg and admitting a fluid under pressure into the pressure chamber to act upon thematerial within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die.

7.=A casting machine having, in combination, a receptacle for the material to be cast, a pressure chamber pivoted for rocking movement and provided with a duct ter- 'm1nating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle,

. said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means for imparting rocking movement to the pressure chamber for raising the nozzle above the surface of such material, means for locking the pressure chamber in the casting position w1th its nozzle above the surface of the material in the receptacle pivoted die-supporting means, a sectional die mounted upon said die-supplorting means and movable therewith, su die being adapted to receive directly from the nozzle the materlalto be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, and means for supplying and admitting afluid under pressure into the pressure chamber to act upon the material within the ressure chamber and eject such. material rom the pressure chamber through the nozzle into the die. I

8. A casting machine having, in combination, a receptacle for the material to be cast, a movable pressure chamber provided witha duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through saidnozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, means for raising said nozzle above the surface of such material, means for locking the pressure chamber in the casting position with its nozzle above the surface of the material inthe receptacle, pivoted die-supporting means, a sectional die mounted upon said die-supporting means and movable therewith, such die being adapted toreceive directly from the nozzle the material'to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means for moving the die-supporting means on its pivot and whereby the die sections are moved relatively to thenozzle and to each other, and meansfor supplying and admitting a fluid under pressure intothe pressure chamber to act upon the material within the pressure cha'mberand e ect such material from the 1pressure chamber through said nozzle into t e die.

9. A casting machine having, in combination,'a receptacle for the material to be cast, a pressure chamberpivoted for rocking movement and provided with a duct terminatmg in a nozzle adapted to be submerged mitting such material to flow into the pressure chamber through said nozzle, said nozportin means and movable therewith, such die bem adapted to receive directly from the nozz e the material to'be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means for moving the die-supporting means on its pivot and whereby the die sections are movedwela'tively to the nozzle and to each other, and means'for supplyingandadmitting a fluid under pressure into the pressure chamber to act u on the material within the pressure cham er and eject such material from the pressure chamber through the nozzle into the die.

' 10;. A casting machine having, in combination, a receptacle for the material to be below the surface of such material for percast, a movable pressure chamber provided with' a duct terminating in a nozzle adapted to be submerged below the surface of such material for permittin such material to flow into the pressure cham r through said noz-.- zle, said nozzle providing the only inlet for such material to' enter the pressure chamber,-

-fluid pressure means including a piston for raising saldnozzle above the surface of such material, means for locking the pressure chamber in the casting position with its nozzle above the surface of the material in thereceptalcle, pivoted die-supporting means,

n said die-sup,

asectional die mounted u portin means and movab e therewith, such die being adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter; .fluid pressure means including a, piston for. moving the die-sugporting means on its ivot w ereby the 1s sections are move relatively to the nozzle and to each other,

meansfor supplying and admitting a fluid under pressure into the 're ssure chamber to act upon the material withm the pressure chamber and eject such material from the pressure chamber through said nozzle into the die, and fluid pressure controlling means for operating the respective pistons of the different fluid pressure means successively,

whereby the nozzle is elevated above the surface of the material in the receptacle and locked in that position-"and thereafter the die sections are closed and clamped to the nozzle, and whereby after the material has been forced into the die the die sections are unclamped from. the nozzle and opened and thereafter the pressure chamber is operated to again submerge the nozzle below the surface of the material, in the receptacle.

- 11. A casting machine having, in combiv nation, a receptacle for the material to be -cast, a pressure chamber pivoted for rockthe pressure chamber in the casting position with its nozzle above'the surface of the material in the receptacle, pivoted die-supportin means, a sectional-die mounted upon said ie-supporting means and movable therewith, such die being adapted to'receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means including a piston for moving the die-supporting means on its pivot and whereby the die sections are moved relatively to the nozzle and to each other, means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure. chamber and e ect such material from the pressure chamber through the nozzle into the die, and fluid pressure controlling means for operating the respective pistons of the diiferent fluid pressure means successively, whereby the nozzle is elevated above the surface of thematerial in the receptacle and locked in that position and thereafter the die sections are closed and clamped to the nozzle, and whereby after the material has been forced into the die the die sections are unclam ed from the nozzle and opened and therea ter the pressure chamber is operated to again submerge. the nozzle below the surface of the material in the receptacle. a

12. A casting machine having, in combi nation, a rec eptacle for the material'to be east, a movable pressure chamber provided 1 with a duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to.

flow into the pressure chamber through said nozzle, said nozzle providing the only inletfor such material to enter the pressure chamber, means for ralslng said nozzle 7 above position with its nozzle above the surface of the material in the receptacle, pivoted die-supporting means, a sectional die mounted upon said die-supporting means and movable therewith, such die being adapted i to receive directly from the nozzle the material to be cast, means for clampin vthe the surface of such material, means for locking the pressure chamber in the cast ng.

die firmly to the nozzle in the elevate and locked position 01' the latter means for supplying and admitting a fluid under pressure into the pressure chamber to act u on the 'material Within the pressure cham er and eject such material from the pressure chamber through' said nozzle into the die, a valve device in control of the pressure fluid for the pressure chamber, and means in control of said'v'a'lve device forprevent ing the admission of pressure fluid into 'the pressure chamber until after the die has been clamped to the nozzle.

13. A casting machine having, in combination, a receptacle for the material to be cast, a pressure chamber pivoted for rocking movement and provided with a duct terminating in a nozzle adapted to be submerged below the surface of, such material for permitting such materialto flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means for imparting rocking move ment tothe pressure chamber for raising the nozzle above the surface of such material,

means for locking the pressure chamber inthe casting position with its nozzle above the surface of the material. in the receptacle, pivoted die-supporting means, a sectional die mounted upon said diessu port-ing means and movable therewith, such ie being adapted to receive directly from the nozzle the material to be cast, means for clampin the die firmly to the nozzle in the elevate and locked position of the latter, means for supplying and admitting a fluid under 'pressure into the pressure chamber to act upon the-material within the pressure chamber and eject such material from the pressure chamber through the nozzleinto the die, a

valve device in control of the pressure fluid for the pressure chamber, and means in control of said valve device for preventing the admission of pressure fluid intothe pressure chamber until after the die has been clamped to the nozzle.

. sition and thereafter the die sections are 14. A casting machine having, in combifor such material to enter the pressure chamber, fluid pressure means including a iston for raising said nozzle above the sur ace of such material, means for locking the pressure chamber in the casting osition with its nozzle above the surface 0 the material in the receptacle, pivoted die-supporting means, a sectional die mounted upon said die-supporting means and movable therewith, such die being adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means including a piston for moving the die-supporting means on its pivot and whereby the die sections are moved relatively to the nozzle and to each other, means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the materia'l within the pressure chamber and eject 30 such material from the pressure chamber through said nozzle into the die, fluid pressure controlling means for operating the respective pistons of the different fiuld pressure means successively, whereby the nozzle is elevated above the surface of the material in the receptacle and locked-in that poclosed and clamped to the nozzle, and wherebyafter the material has been forced into the die the die sections are unclamped from the nozzle and opened and thereafter the.

pressure chamber is operated to again submerge the nozzle below the surface of the material in the receptacle, a valve device in control of the pressure fluid for the pressure chamber, and means in control of said valve device for preventing the admission of pressure fluid into the pressure chamber unt1l1 after the die has been clamped to the nozz e.

15. A; casting machine having, in combi nation, a receptacle forthe material to be cast, a 'pressure chamber pivoted for rocking movement and provided with a ductterminating m a nozzle adapted to be submerged below the surface of suchmaterial for permittinlg sure camber throu h said nozzle, said nozzle providing theonly inlet for such material to enter the pressure chamber, fluid pressure means including a piston for imparting ro'ck' movement to the pressure e such material to How into the pres-.

I such' material amberfor raising the nozzle above the surface of such material, means for locking the pressure chamber in. the casting position with its nozzle above the surface of thejmaterial in the receptacle, pivoted die-supporting means, a sectional die mounted upon said die-supporting means and movable therewith, such die being ada ted to receive di-' rectly from the nozzle t e material to .be cast, means for clamping the die firmly to the nozzle in the elevated and locked position .of the latter, fluid pressure means ineluding a piston for movin the die-su porting means on its pivot an whereby t e die sections are moved relatively to the nozzle and to each other, means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure chamber and eject such material from the ressure chamber through the nozzle into-t e die, fluid pressure controlling means for operating the respective pistons of the difl'erent fluid pressure means successively, whereby the nozzle is elevated above the surface of the material in the receptacle and locked'in that position and thereafter the die sections are closed and clamped to the nozzle, and whereby after the material has been forced into the die the die sections are 'unclam ed from'the nozzle and opened and thereaiger the pressure chamber is operated to again submerge the nozzle below the surface of the material in the receptacle, a valve device in control of the pressure fluid for the pressure chamber,

and means in'contrdl of said valve device for preventing the admission'of pressure fluid into the pressure chamber until after the die has been clamped to the nozzle.

16. A casting. machine having, in combination, a receptacle for the material to be cast, a movable pressure chamber provided with a duct termmating in a nozzle adapted ing means to move therewith and adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, and means forsupply'ing and admit-tin the pressure 0 amber toact'u rial within the ressure cham r and eject om the pressure chamber through; said nozzle into the die.

a fluid under pressure into 17. A casting machine having, in combination, a receptacle for the material tobe the matecast, a movable cast, a movable pressure chamber provided with a duct terminating in a nozzle, adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means for raising said nozzle above the surface of such material, means for locking the pressure chamber in the casting position with its nozzle above the surface of the material in the receptacle, movable die-supporting means, a die carried by the die-supporting means to move therewith and adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means for'moving the die-supporting means together with the die carried thereby, and means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die.

18. A casting machinehaving, in combination, a receptacle for the material to be ressure chamber provided with a duct terminating in a nozzle adapted to be submerged below the surface of such material for permitting such material to flow into the pressure chamberthrough said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means including a piston for raising said nozzle above the surface of such material, means for locking the pressure chamber in the casting position with its nozzle above the surface of the material in the receptacle, movable diesupporting means, a die carried by the diesupporting means to move therewith and adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means including a piston for moving the die-supporting means together with the (lie carried thereby,- means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the bressure chamber and eject such material from the pressure chamber through said nozzle into the die, and fluid pressure controlling means for operating the respective pistons of the different fluid pressure means successively, whereby the nozzle is elevated above the surface of the material in the receptacle and locked in the die is unclainped from the nozzle and flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, means for raising said nozzle above the surface of such material, means for locking the pressure chamber in casting position with its nozzle above the surface of the material in the receptacle, movable die-supporting means, a die carried by the die-supporting? means to move therewith and adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, means for supplying and admittin afiuid under pressure to the pressure cham er to act upon the material within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die, a valve device in control of the. pressure fluid for the pressure chamber, and means in control of said valve device for preventing the admission of pressure fluid into the pressure chamber until after the die has been clamped to the nozzle.

20. A casting machine having, incombination, a receptacle for the material to be v cast, a movable pressure chamber provided ber in the casting position with its nozzle above the surface of the material in the receptacle, movable die-supporting means, a die carried by the die-supporting means to move therewith and adapted to receive directly from the nozzle the material-to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position ofthe latter, fluid pressure means for moving the die-supporting means together with the die carried thereby, means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die. a valve device in control of the pressure fluid for the pressure chamber, and means in control of said valve device for preventing the admission of pressure fluid into the pressure chamber until after the die has been clamped to the nozzle.

21. A casting machine having, in combination, a receptacle for the material to be cast, a movable pressure chamber provided with a duct terminating in a nozzle adapted to be 'submerged below the surface of such material for permitting such material to flow into the pressure chamber through said nozzle, said nozzle providing the only inlet for such material to enter the pressure chamber, fluid pressure means including a piston forvraising said nozzle above the surface of such material,means for locking the pressure chamber in the casting position with its nozzle above the surface of the material in the receptacle, movable die-supporting means, a die carried by the die-supporting means to move therewith and adapted to receive directly from the nozzle the material to be cast, means for clamping the die firmly to the nozzle in the elevated and locked position of the latter, fluid pressure means including a piston for moving the die-supporting means together with the die carried thereby, means for supplying and admitting a fluid under pressure into the pressure chamber to act upon the material within the pressure chamber and eject such material from the pressure chamber through said nozzle into the die, fluid pressure controlling means for operating the respective pistons of the difierent fluid pressure means successively, whereby the nozzle is elevated above the surface of the material in the receptacle and locked in that position and thereafter the die is clamped to the nozzle,

and whereby after the material has been forced into the die the die is unclamped from the nozzle and thereafter the pressure chamber is operated to again submerge the nozzle below the surface of the material in the receptacle, a. valve device in control of the pressure fluid for the pressure chamber, and means in control of said valve device for preventing the admission of pressure fluid into the pressure chamber until after the die has been clamped to the nozzle.

22. A die casting machine comprising a receptacle for the material to be cast, a movable ladle provided with a duct terminating in a nozzle, means for admitting the material to be cast into the ladle, a movable die adapted to receive directly from the nozzle the material to be cast, and means for forcing the material to be cast from the ladle through the nozzle directly into the die.

23. A die casting machine comprising a receptacle for the material to be cast, a movable ladle provided with a nozzle mounted thereon. means for admitting the material to be cast into the ladle, a movable die, means for moving the die and nozzle relatively to each other, means for locking the die to the nozzle just above the surface of the material to be cast, and means for forcing the,

material to be cast from the. ladle through the nozzle directly into the die.

24. A casting machine having in combination a melting pot, a movable pressure chamber terminating in a nozzle adapted to be submerged below the surface of the molten metal, means for moving the pressure chamber so that the nozzle is just above the surface of the molten metal, a movable die, means for locking the die to the nozzle, and means for forcing the molten metal from the pressure chamber through the nozzle directly into the die.

25. A casting machine having in combination a melting pot, a movable ladle'terminating in a nozzle adapted to be submerged below the surface of the molten metal, means for moving and locking the ladle so that the nozzle is just above the surface of the molten metal, a movable die, means for locking the die to the nozzle, and means for forcing the molten metal fromthe ladle.

through the nozzle directly into the die.

26. A die casting machine comprising a melting pot, a movable ladle terminating in a nozzle adapted to be submerged below the surface of the molten metal, means for moving the ladle so thatlthe nozzle is held above 27. A casting machine having in combination a receptacle for the material to be cast, a movable pressure chamber terminatin in a nozzle, means for admitting the molten metal into the pressure chamber, means for raising said nozzle above the surface of the molten metal, a movable die, and fluid pressure means to discharge the molten metal directly into the die.

' 28. A casting machine havin in combination a melting pot, a movable ie, a movable pressure chamber terminating in a nozzle adapted to be submerged below the surface of the molten metal, means forraising and locking 'said nozzle above the surface-of the molten metal, and means for supplying and admitting a fluid under pressure into the pressure chamber to force the molten metal in said meltin pot, means for rotating the and means for supplyingair ifr'ider pressure pressure cham er so that the nozzle is subto the pressure chamber for forcing the. merged below the surface of the molten molten metal from the pressure chamber 10.- metal at one limit of movement ofsaid resthrough the nozzle directly into the die. v a 5 sure chamber and adapted to lock wit the In testimony whereof I have. aflixed mi; nozzle just above the surface of the molten signature.

' metal at the other limit of said movement, GEORGE WALDEMA