US1618223A - Die-casting machine - Google Patents

Description

Feb. 22, 1927. n,e18,223

E. P. PLERCE DIE CASTING MACHINE Filed Julyg, 1920 5 sheets-sheet 1 Feb.A v2,2, 1927.

Filed July 26. 1920 y E. P. PIERCE DIE CASTING MACHINE n In l l 5 Sheets-Sheet 2 /zz z/ezz for Feb. 192

22 7 E. P. PIERCE DIE CASTING MACHINE A Filed July 26. 1920 5 Sheets-Sheet y @gf-'6 ffgcff Feb. 22 1927.

E. P. PIERCE DIE CASTING MACHINEl Filed July 26. 1920 5 SheetsfShef 4 CTZ'L.

Feb. 22, 1927. E. P. PIERCE DIE CASTING MACHINE I Filed July 26. 1920 5 Sheets-Sheet 5 Patented Feb. 22, 1927'.

i ERNEST P. PIERCE, F CLEVELAND, OHI.

DIE-casrmo MACHINE.

Application led July 26,

and out of operative position with respect to the other. art of the device which encloses the cylinder for the molten metal'and plung-4 er; to providefluid actuated means for moving the die carrying frame whereby the two parts will be locked in operative position; to provide fluid aet-uated'togglelever mechanisrn upon the die carrying frame which will lock the die members in operative position; to provide Huid .actuated means for op- Ierating'the plunger in the cylinderv of the pot; to provide an arrangementwhich will guard against the operation of the plunger. except when the die carrying frame is in operative position; to provide a means for bracing the cylinder in position; to provide a means in thelever; mechanism for the operat1on vof the plunger whereby correctionmay be made for maccuracles 1n alignment of the bore of the cylinder and the guide for the plunger operating means; to'provide an angular arrangement of the plunger and that part of the cylinder in wh1ch 1t operates; to provide means whereby the piston will'be `at all times covered by the moltenv metal; to provide means for varying the operative position of the diecarrying frame according to theelevation of the nozzle on the cylinder; and to provide an arrangement' of all the part-s which will be convenient for' `the operat-ion thereof. My invention might be embodied in other forms of structure but the preferred form will be understood from the following description and claims considered in connection with theaccompanying drawings. y

Fig. 1 is a f ont elevation of my machine with parts bro en away; Fig. 2 is a yplan view of my machine; Fig. 3 shows diagram'- matically" the two positions ofthe die carryframe.; Fig. 4 illustratesl the four-way valve structure; Fig, 5'is a plan view of a hinge rod used on ,the die carrying frame for the toggle levers;.Fig.' 6 is a 4front elevation of the di'e 'carrying'frame showing the toggle mechanism in open position; Fig. 7 is a similar view showing the toggle mechanism in closed position; Fig. 8 is a sidel elevation of the die carrying frame showing the toggle mechanism in4 closed position; Fig. 9 is a plan view ot the toggle supporting brackets;

.i be understood 192e. serial No. 399,003.

Fig. 10 is a vertical section throughthe pot. and cylinder; Fig. 11 is an end eleva-tion of the means vfor lockingI the plunger operating. Y means; Fig. 12 is a plan viewv of lthe bracing -60 means for the cylinder; Fig. 13 is an elevai tion of the same bracing means; Fig. 14 is a section on line afa, Fig. 12; and Fig. 15 shnws thecylinderin side elevation within the pot which is shown in cross section. 455 My device comprises, ina general way, av stationary frame member in which is mount'- ed the cylinder for the molten metal, and means for operating the' plunger for forcing the molten metal therefrom into the die; and a die carrying frame which is mounted upon the stationary member so as to be .swungthrough a vertical plane into and out of operative position. Details of structure willfroin the vfollowing descrip- V tion.

The lower stationary part of the device is supported upon the legs' 4, that part indicated at- 1, and inwhich is enclosed the cylinder, comprising an enclosed body, while the other part of this stationary structure is open frame work. The pot 10 for the molten metal 10 is surrounded by firev brick 7 and is supported by means Vof a flange 11 which engages over the flange 9 which extends in- 85 wardly from the four. Walls of this part of the frame. The upper end of the supporting'brackets 13 of the cylinder 12 rest upon the lange of the frame and are countersunk in part, as indicated at 14, so that the heads of the screws for securing these brackets in position will not interfere with the die carrying frame when it'ismoved into operative position. Moreover, sullieient clearancev is provided for theV die carryingframe. cylindery is so arranged that the piston `is always covered by the molten metal, 'with the result thatl the danger of metal freezing and jamming the piston is avoided. An opening 15 is provided inthe side wall of the cylin- 109 der so as to allow lthe molten metal to flow into the same. .The cylinder bore Vis restricted toward the outletr end thereof, as clearly indicated in Fig. 1.' The `cylinder'is of a substantial-V-shape, as clearly shown in Fig. lo 1', and it is so vconstructed that the two arms thereofwill make an angle of. lessthan 90A with each other, preferably from 30 to 60: this angle being' about 45. in the present shplwing, and one arm` being arranged vertica v. v Y A bushing member-.16 into Vthe cylinder and has its upper surface. curved lvalve is set in one position by vmeans of int-o. an outlet nozzle, as indicated at 17. The plunger 18 which reciprocatesin the cyl;

inder bore is operated'by the piston rod 19 which is pivotally connected at 20 to the lever operating mechanism through the compensating means which will be later de scribed. The means for heating the metal in the pot is indicated in a general way at 2, which might be of any suitable kind, as for instance, a` gas/burner, while the connection 22 provides forl the escape of gases which might be formed in the space 23 between the fire brick and the pot.

The air lcylinder -24 with its supply pipe 25, exhaust 26 and feed pipes 27 and 28, together with the valve operating means constitute the means for operating the lever mechanism which is connected with the plunger rod of the cylinder for the molten metal. A four-way valve is provided, as illustrated in Fig. 4, whereby when this handle 31, connection may be established through they air supply pipe and the pipe 27 leading to the underside of the piston of thel cylinder, at which time the piston will be forced upwardl At the same time air connection is esta lished between pipe 28 from the top of the cylinder and the exhaust 26, so that airfwill lbe -forced from the top of the cylinder out through the exhaust, vthus allowing the piston to rise. Then upon turning thel valve in the opposite direction the reverse operation is obtained; that is, air will be forced to the upper side of the plunger and the air below the plunger will be forced out through the exhaust. This valve is in neutral position in Fig.' 2 and its operation will be understood from Fig. 4

which shows the ducts 32 and l33. Other valve arrangements might be` employed instead of that here shown. A lever 'arm 34 is pivotally connected at 35 to the upper end of the piston rod and is pivotally connected at its up er end to the lever arm 36 which is pivota ly mounted at 37 upon the bracket 38. The other end of lever 36 is pivotally connectedat 39 to the link member 40 which is pivntally connecterLat 20 torrthe compensating means. The mechanism for operating the plunger is so arranged .with respect to the-pivot point of lever 36l thatv there is a suiiicient balance of weight orrthe side toward the. cylinder'24, so that its piston will repiain in lowered position without air pres- .sure. Thus the air can beshut olf from this cylinder when the plunger 18 is in withdrawn position. Y The bracket 38 is located away vfrom the. pot so that molten metal will not splash on thebracket and cause. a jamming of the parts.,` vThis bracket is made in-the'form of aclevis at its upper part, vas clearly indicated in Figs.` 1 and-2, forI convenience in be suspende mounting the lever arm or walking beam 36. This bracket has an arm 38a to guide the piston rod of the' cylinder 24. This bracket 38 is bolted to the flange at the top of the frame and is provided with ears 42 and 42' on the two sides thereof, as indicated in Figs. 12 and 14. The upper ends ofthe bracing .rods 43, 43' are secured within these ears by means of nuts 44,y 45 and 44'-, 45', the lower part of rods 43, 43;' being provided with lugs 46, 46 which engage in cut out portions 47, 47' in the sides of the cylin4 der. As'will be seen in Fig. 12, the lugs- 46,46 have a wedge shape' and the cut out portions have inclined bottoms, as at 48, 48', so as' to allow the lugs 46, 46 to be lowered within these cut-out portions and then raised into `the locking position with the broader pcrtionsof thelugs engaging in the recesses 49, 49' formed by means of shoulders 50, 50. By first engaging these lugs in the cut-outportions ofthe cylinder and then clamping the nuts 44, 45, and 44', 45' against the upper and-lower faces of the ears 42, 42', the cylinder can be braced in proper position and will be held against accidental displace# ment during the operation of the machine.

Guide members 51, 51' are secured by means of bolts 52, 52' along the face of the bracket just referred to and extend inwardly over the cut-out portion 53 which is formed in the bracket member and extend parallel with the offset portions 54, 54', as indicated 'in Fig. 14. In this way a guide-way is pro- 57 against their respective' seats 58, 59, a

correction can be effected without disturbing the entire operative connection between the piston vrod and thel lever mechanism. In

other words, the enlarged hole 19v in" the v slidable member 55 allowsthepiston rod to be displaced in any direction across its axis.

The seat members 58, 59 are formedwith concave faces to receive the corresponding convex faces of the nuts 56, 57 ,.respectively,

may be had upon adjusting the piston rod 19. as just referred\to. l

l The shaft" 60 is mounted upon vadjustable bearing means which will'be later described.

,The lever arm 61' which is fast *upon the shaft 60 is actuated by means. of air' pressure in the cylinder 62, which cylinder might v from a suitable point at proper so/ that a more ready seating of the nuts I CI `reverse connections are established.

elevation above the machine by means 'of the swinging connection 63, .which is an old arrangement` in the art. The lower end ot' the piston rod 64 is connected to the lever 61, while a piston is carried upon the upper end thereof. Cylinder 62 is provided with a four-way valve 117 and its piston is operatedvin the same manner as that of cylinder '24. By manipulation of handle 118 connecsupported at a suilicientlv high point to all:in

10W proper operation of the'piston and the swinging of the cylinder. The lever arms 66, 66' which are fastened at one end to the shaft have pivotal connection at 67, 67 with'the connecting` links 68, 68. These ends, as clearly indicated in Fig. 1, and

are pivotally connected at-71 and 7 1v to the bars 69, 69. The bars 69, 69 are bolted at 70, 7 0 along the lower part of the die car' rying frame. The hinge projections 65, inthe die carrying frame have bearing in the castings 65a, 6'5? on the stationary frame. Fig. 1 shows the die carrying frame'in op# erative position with respect to the rest of the device, and it will -be seen from Fig. 1-

that the lever mechanism just referred to is so arranged that it will lock the die carrying frame in closed position. This is made'possible by the fact that the points of pivotal connection 67, 67 are swung beyond the line of pivotal connections 60, 60 and 71,

Y 71". In other words, theI link members 68, 68' are swung'slightly beyonddead center.V The adjustable bearing Imeans for y-the shaft 60 comprises plate - members 72,72. which are duplicates in structure and only one of them will be-descrbed. The plate 72 is pivoted to the side of the frame at- 78 and is provided with means for being locked in proper position. Enlarged bolt holes are provided in theplate -72 as indicatedat 74 and 75 -so that this' plate member can" be moved even though' the bolts 76 'and 77 pass through these openings and through the wall of the frame. When the plateA member 72 has been adjustedi to the proper position: the nuts on the outer end's of bolts 76 and V77 can be tightened to hold the nlatein such position. .The rod 78 is pivotally connected Y `tothe plate member 72 at the point 79 and` extends through an ear'formed on the 'sidej ofthemain artof .the frame,:as indicated at 80. The ower -end of this rod is screwlthe lower die member. links 68, 68 are curved near their other voperated for the purposelof "molten metal into the die. f

threaded and is adapted toy receive a nut 81 which can be .tightenedagainst the low" 'er face of the ear 80 and in-this Way clamp ward'movement. A means for clamping :the plate 72 in proper position against up- 70., *the plate l72'in proper position against downward movement comprises a screw bolt 82whose` head supports the lower edge ot' the plate member 72. This screw b olt 82' carries a nut 83 which can be screwed into locking engagement against `the upper face of the ear into which the screw bolt 82- is adapted to" be threaded. Thus it will be seen that the screw bolt 82 can be raised or lowered by being screwed `up or down in ear 80 and will thus'raise or lower the plate 72 1ing or lowering the shaft 60 in this manner tne length ofthrow of the lever mechanism is varied and adjustmentl is elected between the nozzle 17 on the cylinder and A latch member-is pivoted at 84 upon a- VF:bracket arm 85 which extends from the main 4frame of the machine, and is normally held by means-ot spring 86 in such position that it will' lock the arm 87 of the valve operating handle 31, the'pin 84a extending from this latchl member dropping into a hole 87a in arm 87,'as indicated in Fig. 11. Thus the spring 86 through the latch member no-rmally holds the 'Valvevhandle 31 i-n locked position so that the piston of the cylinder 24 cannot be operated when in such-position. The end portion 88 of the' lever arm, 61 is 'dapted to be lowered upon the rear end ot9 the latch member and to release the same against the tension vo f the spring 86; at which time the valve handle 31 can be forcing the The` lower andl upper'parts of the die are i carried bythe plate members 89and 90, re- `spectively,`whichare- Supported upon' the upri hts 91 forming part'offthe die carry' ing rame.y The lower'member 89 has xed position upon the die carrying frame, While llt) the uppermember 90 is adapted to be moved hack and' forth thereupon. 'The lowery die member isf detachably mounted-in plate 489 y'and is'provided lwith a mouth at the lower end of its metalreceiving -port to fit the nozzle 17, aswill be obvious to onewho 1s 4familiar. with the .a 'Bushing `menbers 92 are secured'to the ower face of the upper member 90. Suitable openings lare provided L in the die to allow escape of air upon Iilling` the die'with molten l` metal, which is an old 'practice in the art and is therefore v'not illus-`- itrated. 'A fluid cylinder 93 is securedby means ofybolts upon the upper :face of the die plate 90, and through the operation of the valve mechanism which controls the fluid this cylinder and dieplate can be moved back and forth upon the frame soas to close or open the die. The piston rod 94 is provided with ears at its upper-end, which ears have pivotal connection at 95, 95 with link members 9S, 9G.` These link /members in turn are pivotally connected at 97 and 97 with the shorter arms of the lever members 98, 98, the last named levers being pivotally mounted upon bearings 99, 99 which will be later referred to in detail. Levers 98,98. are of an open frame structure and are narrowed from the upper to the lower end so as to swing between the bearings 99, 99. These two levers are duplicates. The other end of the lever 98 is pivotally connected at 100 to the lever arms 101, which last named lever arms are pivotally connected'at 102, to the hinge rod 103 mounted on the main supporting bars 104. The bars 104 are held in fixed positionxby means of nuts 105 engagingthe screw threads on the uprights, as shown,- and hinge rods 103 are curved at the middle portions 106, as seen in Fig. 5, to accommodatethe -upper end of the cylinder as it moves past these rods. These supporting bars are duplicates; and likewise the two hinge rods. The lastnamed bars 104 remain in iixed position during the reciprocatoryv movement of the piston and cylinder, with the result that when fluid is .forced `upon the upper sideof the piston, the lever members will be moved from the position yshown in Fig. 6 to that shown in Fig. 7. 'The piston under the force of the Huid pressure folds the lever arms in the manner just referred to and will also carryV the cylinder with the upper die plate to the position illustrated in Fig. 7. Thus it will be seen .that the die is closed with a posi tive force'and an effectual lock is obtained by straightening the toggle lever mechanism to prevent accidental opening of the die.

Cylinder head 106 is secured by bolts to the cylinder'as shownand upon the cylinder head there are provided two bracket memA bers having semi-circular feet 107, 107 vsecured bysmeansiof bolts as shown.. The legs 109,109 are provided at their upper ends withA bearingsi 99, 99 for the lever arms 98,

98. As clearly shown in Fig. 9, sufficient space lis .allowed between the guide bearings 110, 110 and 99, 99 to accommodate the lever'arms 101, 101. As will be seen from the drawings th'e legs 109, 109 extend up- 111, 111 andthe bearings 99, 99.

ferred to are given suiiicient inside curvature to allow free access to the stuffing` box of the piston. Sufficient spaceis alsoAv provided between the legs of the brackets to allow folding of the links 96, 96', as seen in Figs. 6, 7 and 9.

A four-way valve 112 like that described before and illustrated in Fig. 4, is employed in connectionwith the operation of cylinder 93, that is to sayywhen the valve 112 is set in one position, air connection is obtained through the supply pipe 113 and fthe pipe 114 which has connection witli;` the upper side of the piston. lAt the same time the pipe 115 from the lower face of the piston is connected with the exhaust 116. Then upon setting the valve 112 in the other posilion, the supply pipe 113 is connected through pipe 115 with the under side of the piston and the pipe 114 isA connected with the exhaust. T he upper die plate 90 is bored out as indicatedin dotted lines at 90a for passage of air to the lower end of the cylinder, that is, from pipe 115 to the under side of the piston. The flexible pipes or tubes 113, 114 and 115 are connected as shown in Fig. 1 with the metal pipes of the valveand cylinder. be -used at this point instead of that shown.

The parts on the die kcarrying frame, including the cylinder, its piston land piston Other valve arrangements might rod, are/of suflicient-weightto hold the die v in closed position without maintaining the air compression, even though the toggle lelvers are not brought to Yfully straightened position.

The operation of this device briefly stated co-operative relation with respect to the nozzle upon the cylinder- This is accomplished by means of the air cylinder 62. The `-air upon being admitted to the under 'face of the piston will force rod 64 upwardly and will cause swinging movement of the lever arm to thef-right,.-the air :above the'piston being exhausted at the same time through the pipe 120. reaches the crest in its rotary motion it `wil move downwardly to the right so as to assume the position shown in Fig. 1. As soony as the -crest isreached the operator will manipulate the valve Gso as to gradually admit air through pipe tothe upper side of the pistn so as to gradually release the air1 from the under side of the piston, thus allowing the die carrying frame to lower to its normal Then whenl the lever arm` 6 position against the air compression on the i under sideof the'pston'. This will prevent any sudden jarring of the die carrying frame as it moves into -position over the pot. The

l i 'can then turn air onto the lower face of the curved portion vof the link members `(i8, 68v

will then come to rest upon the shaft 60, sufficient lclearance being providedbetween the bearings and the lever connections. When.

piston in cylinder 24 and in this way force the metal from the pot into the die. Then having filled the die by operation of'the valve, the die carrying frame will be swung to the left by turning the yvalve to admit air to the under side of the piston and to connect pipe 120-with the exhaust. i As soonas the lever arm 61 reachesits crest in its rotary movement to the left, thev'operator will gradually reverse the air connections so -as to release the air from the. under side `of the piston, and in this way accomplish a gradual lowering of the die carrying frame to its horizontal position, using the air com- 'pression under the piston to prevent any sudden jarring thereof. T lie casting can then be removed from the die and the same operation repeated.

With my 'arrangement all of the parts are conveniently and compactly located with respect to each other and decided advanta esare realized in the operation 'of the piston or forcing the molten metal into the d ie,' and also in connection with the operation for closing the die members. Among other sadi ticular device will readily suggest themselves.

vantages resulting from my device isthat which resides in the parti/cular arrangement of the cylinder. A s will be seen from Fig. 1, that portion of the cylinder which has the enlarged part of the bore makes an angle of approximately 45 with respect to its other part. Y ment the piston operates at an angle substantially "l to the horizontal, and by means of the particular lever connections the airl cylinder for operating vthe same is conveniently located on one end of the machine. Then, too, by having the piston always covered with the molten metal there is no danger of such metal freezing ory causing the piston to jam in the cylinder. lThe advan- 'tages resulting from `the lever operating vmeans which allows the locking ofthe die carrying frame in operative position, as well las 'that resulting. from they-means for preventing actuation yof the plunger before the die carrying frame is in operative position will be obvious; as also that resultingk from the meansforbringing the die memberstogetlier andsecuring the'in in closed position.

i The adjustable bearingfor the shaft which isconnected-with the levers for moving the die carrying frame constitutes another ,ad-v

vantagein connecti011` with the proper seat# As the result of this arrange-` ing of the die carrying frame upon the nozzle. With this arrangement it is possible to. properly position the die .carrying frame with respect to different cylinders in which the nozzles termin-ate at different elevations.

-Fiirther .advantages are found in the means for bracing the cylinder against accidentalA displacement, and also in the means for compensating for any inaccuracies 1u the bore `of the, cylinderor in the alignment of tlie bore and the guide for the lever mechanism.

-which is also movable, .the weight ofthe parts upon the frame is toa large extent kept low. Furthermore, the arrangement. of

the cylinder. between the movable members just referred to produces a more elcient operation of the parts along the frame. Still another. advantage resides in the fact' that the die can be maintained lin closed position by theair pressure or the air can be cut-off, the die remaining closed under the weight of the parts, even though the toggle levers are not in fully straightened position.

Other advantages resulting from this parto those who are familiar with the art to which it relates. c c

What I claim is: f. l. In a die casting machine, the combination of a frame, a cylinder in said frame, a plunger mounted on said frame atan angle of substantially' 45 to tlie vertical, means i for operating said plunger in said. cylinder, and a swingingly 'mounted die 'carrying frame adapted' to be swung into and out of vertical position above the cylinder.'

' 2. In a die castingmachine, the combination of a frame, a cylinder stationary in said frame, a plungerl for4 said cylinder,

means for operating said plunger, a swingingly jmounted die carrying frame andfluid compression means for swinging said .frame Y into and out of vertical `position above the cylinder and for ,producing lopening and closing movement of the upperdieon said v'diecarrying frame.

y3.'. In a die casting machine, the combina- Y tion of a frame, a cylinder in said frame, `a plunger for said cylinder, means for operating said plunger, a swingingly mounted die carrying frame jadapted to `be swung into and out of operative position,*lever mechanism for 'eecting such swinging movement,

past dead center to lock the die carrying frame in closed position, and means for efiectingy such swinging movement of the die carrying frame.

5. In a die casting machine, the combination of a frame, a cylinder insaid frame, a

'plunger for said cylinder, means for operating said plunger, a swingingly mounted die carrying frame adapted to be swung into 'and `out of operative position, lever arms connected tothe stationary and die carrying frames and having pivotal connection With each other, said lever arms being so constructed and arranged that the point of pivotal connection between said lever arms may pass beyond dead center upon operation of said lever arms for bringing the die carrying frame to operative position.

6. In a die casting machine, the combination of a frame, apot supported in said frame, a cylinder in said pot, and having a bore of angular extent, the discharge portion of said angular bore being substantially vertical, a plunger for operation in the borel of said cylinder, and means for operating said plunger, the parts being so arranged that the plunger bears an acute angle to the horizontal.

7. In a die casting machine, the combination of .a frame, a pot supportedin said frame, a cylinder in said pot having a plunger bore at anangle to the vertical, a bracket upon said frame, and bracing rods having connection with said cylinder and said bracket and extending at an angle corresponding to the angle of the plunger bore.

8. In a die casting machine, the combination ofv a frame, a pot supported in said frame, a cylinder in said pot, a plunger for operation in said cylinder, means for operating said plunger and an adjustable connection between said operating means and the plunger allowing adjustment thereof.

9. In a die casting machine, the combination rof a frame, a pot supported '1n said 1 frame, a cylinder in said pot, a plungerfor operation in said cylinder, means for operating saidjplunger, said operating means ineluding a connection allowing adjustment in a plane transverse to the direction of loperai tion of'said plunger. f

` 10. In a die casting machine, the conibination of a frame, a pot supported in said rif-ame, a cylinder -i'n saidpot, a plunger -for co-operation with said cylindenya bracket upon said frame, means for operating said plunger including a member having sliding relation with said bracket, saidmember having adjustable connection with said operating means.

11. In a die casting machine, the combination ot a frame, a cylinder in said frame, a plunger for said cylinder, means for operating said'plunger, control means for said operating means a die carrying frame adapted to be moved into and out of operativeposition, means for controlling the die carrying frame in its movements and means under control of the die carrying frame for locking the control means of said plunger operating means in inoperative position.

12. In a die casting machine, the combination of a frame, a cylinder in said frame, a plunger for said cylinder, means for operating said plunger, a die carrying frame adapted to-be moved into and out of operative position, means for locking said optive position, and means for moving said die carrying frame into and out of operative position, the plunger operating means being under control of said last named means and separate control means for the plunger and die carrying frame operating means.

1.4. In a diecasting machine, the combination of a frame, a cylinder in said frame, a plunger for said cylinder, a'die carrying frame adapted to be mbved into and out of operative position; valve-controlled fluid means for operating the plunger, and means under control of the die carrying vframe for locking and releasing said valve control of the fluid operati-ng means for said plunger.

15. In a die casting machine, the combination ol a stationary frame, a cylinder in said frame, a swingingly mounted die carrying frame, means for swinging said die carrying frame into and out of operative position, said means including an adjustable pivotal bearing, whereby the position of 'the' die carrying l rame with respect to the cylinder can be varied. A

16. In a die casting machine, the combination of a. Stationary frame, a cylinder in said frame, a die carrying frame operatively associated with said cylinder, and being provided With relatively movable die `supporting plates, and means for bringing said die supporting plates into and out of closed relation, said means including double toggle `lever mechanism, said toggle -lever mechaposition the toggle levers are inv collapsed and approximately; straightened position,

thereby providing a lock for said die supporting plates. v

17. In a die casting machine, the combination of a stationary frame, va cylinder in said lframe, a swingingly mounted die carry- V of the same, whereby the position ofthe die car in@r frame' with respect to-thec linder ry .e y

18. In a die casting machine, the combination of a stationary frame,- a cylinder in said frame, a swingingly mounted Idie carrying frame, means' for swinging said die carrying frame` into and out of operative position, andm'eansvfor Vvaryili the swinging connection between the ie carrying frame and the means for swingingv the same, wherebyl the position of the die carrying frame with respect to the cylinder can be Varied.

19. In a die casting machine, the combi- A nation of a stationary frame, a cylinder in saidframe, a swingingly mounted die carrying frame, means for swinging said die car.- rying frame into and out of operative position, said means including a bearing member for said swinging means, saidbearmg member being pivoted to said frameand having mea-ns for securing the same in adjusted position.

20..In a die casting machine, the combi` nation of a stationary frame, a cylinder in said frame, a swingingly mounted die carrying frame, means fer swinging said -die carrying frame into and outof operative position, said means m'cluding a bearing member for said Swin 'ng-means, said bearing memv ber being adjustable upon said frame and means for securing the same in adjiistedposition. 21. In adie casting machine, the combination of a vstationary frame, a cylinder in said frame, a swinginglyjnounted die carrying frame, means for swinging said die carrying frame into and outof, operative position, s aid means including shearing member for said swinging means,A saidbearing meniber being adjustable upon. said lframe iii'. a.

vertical plane, `and .means vforlocking said bearing member against upward and downward movement. f

` 22. In a die casting machine, the combi.

nation of a stationary frame, a cylinder in saidl frame, a swingingly mounted diefcariy1ng.frame,vmeansy for swinging said die carrying frame 1nto vand out of operative position, said means including a plurality of bearing members for said swinging means, said members being adjustably mounted andfmeans for securing the saine in adjusted position.

23. InA a die casting machine, the combi` nation of a stationary frame, aV cylinder 1n' said frame, a swingingly mounted die carrying frame, means lfor swinging said die carrying frame into and out of operative position, said means vincluding a lplu- 'ality of independently adjustable bearing members for said swinging means.

24. In a die casting machine, the combination-of a stationary frame, a cylinder in said frame, a swingingly mounted die carrying frame, means for swinging said i die carrying frame into and lout of operative position, said means includingV aplurality of bearing members for said` swinging means, said members being capable of independent adjustment and means for securing the same in adjusted position.

In a die casting machine, the combination of a fra1ne,`a pot supported in said frame, a cylinder in said pot, a plunger for operation in said cylinder, and lever mechanism for operating said plunger, said lever mechanism being so constructed and arranged that the weight of the power end thereof will df itself maintain said plunger in Withdrawn position.

26. In a` die casting machine, the combination of a frame, apot supported in said frame, a' cylinder in said pot, a plunger for operation in saidcylinder, Huid actuated lever mechanism for operating said plunger, the weight of said mechanism being so distributedwith respect to the fulcrumpoint that the power end thereof will be maintained..in withdrawn position by' gravity alone. i

27. In a die'casting machine, the combination of a frame, a cylinder in said frame, a plunger for said cylinder, means for operating said plunger, a swingingly mounted die carryinvr and out 0 operative position, lever arms -connected t the stationary `and die carry-- ing frames and having pivotal connectiona plunger for said cylinder, means for operating said plunger, a die carrying fra-me adapted' to be moved into and out of operative position,` and Huid compression meansv for opening and closing the die, said means including a cylinder mounted for movement in a path in substantial alignment with that o f the dies in closing and opening.

29. In a die casting machine, the combinationof a, stationary frame, a cylinder in said frame, a'die carrying-frame operatively associated with said cylinder and beame adapted to be swung into' isoA ing provided with relatively movable die supporting plates, and fluidcompression means for bringing said ydie supporting -plates into and out of closed relation, said means including a cylinder mounted upon theouter faceof one of said die plates.

30. In a die casting machi/ne, the co-mbination of a stationary frame, a cylinder in said frame, a die carrying frame operatively associated with said cylinder and ybeing o provided with relatively movable die supnation of .a stationary frame, a cylinder in said frame, a die carrying frame operatively associated with said cylinder and being `provided with relatively movable die supporting plates, and means for bringing said die supporting plates into and out of closed relation, said means including fluid actuated mechanism, said mechanism "having 'spaced connections with said die carrying` frame for movementv therealong, and a fluid cylinder forming a part of saidmechanism v located between said spaced connections.

. 32. In a die casting machine, the combination of a stationary frame, a cylinder in said frame, a. die carrying frame operatively associated With said cylinder and being provided with relatively movable die supporting plates, and means for bringing said die supporting plates into and out of closed relation, said means including a mechanism' having spaced connectinns with said die carrying frame `for movement therealong, and having also a fixed connection with said die carrying frame at.a point between said spaced connections.

33. In a die casting machine, the combination of a stationary frame, a cylinder in said frame, a die carrying frame operatively associated with said cylinder and being provided with relatively movable die supporting plates, and means for bringing said die 50 supporting plates into and out of closed relation, said means including mechanism so constructed and arranged that said die mem- -bers can be maintained in closed vposition by the weight/of said mechanism alone..

In testimony whereof I aiiix my signa' ERNEST P. PIERCE.

ture.

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