US1765653A - Automatic die-casting machine - Google Patents

Description

June 24, 1930. E. cARLsoN AUTOMATIQ DIE CASTING MACHINE Filed Jun 28. 1928 5 Sheets-Sheet E. CARLSON AUTOMATIC DIE CASTING MACHINE June 24, 1930.

Filed June 28. 1928 5 Sheets-Sheet' 2 del? 210;:

June 24,l 1930. E. CARLSON AUTOMATIC DIE CASTING MACHINE Filed June 28. 1928 5 Sheets-Sheet Q72" y at @075655,

TQQ/ep LOZ y June 24, 1930. E. CARLSONl Filed June 28 1928 AUTOMATIC DIE CASTING MACHINE 5 Sheets-Sheet 4 June l24, 1930. y E. CARLSON 1,165,653

'AUTOMATIC DIE CASTING MACHINE l FileaJune 2s. 1928 5 sheets-sheet 5 vr R .2 z/'ejy for.

Patented .lune 24, 1930 UNITED STATES ascissa PATENT- OFFICE ERIC CARLSON, F CHICAGO, ILLINOIS, ASSIGNOR TO STEWART DIE CASTING CORPO- RATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE AU'IOMATIC DIE-CASTING MACHINE Application tiled June 28,

The present invention'relatesto a power actuated die casting machine, and has for its principal object to provide a machine of improved construction automatically actuated and manually controlled. The machinev proper, is provided with mechanism for automatically loading in a die member, parts that are to be cast integrally in a die cast object the die member with the parts loaded therein then being conveyed in timed relation for assembly with the other die member to form a complete mold; co-operating in timed relation with the mold is a molten metal reservoir arranged for charging the mold under pneumatic pressure with automatically controlled mechanism for cutting oil' the charge and separating the mold at a timed predetermined period; the die cast object remaining in the lower die member which is then conveyed to an automatic mechanism for ejecting the object from the die member and again repeating the cycle.

A further object is to provide a machine that is positive and elicient in operation in which manual labor is practically entirely dispensed with. Another object of my in- 'vention is to so construct a unitary machine to provide substantially a continuous operation of loading parte into a die member, charging the mol and ejecting the die cast object t erefrom; these o erations being entirely automatic, but un er manual control. It consists in certain features and elements of construction, .in combination, herein shown and described, as indicated by the claims.

In the drawings;

Figure 1 is a side elevation of a complete, machine embodying the present invention, a portion of the `main frame being broken away to show the manner of supporting and drivingpthe rotative feeding table.

igure 2 is a plan view of the machine; showing the automatic loading mechanism broken away from the machine. roper, but

dilmembers mounted on the rotary 'feeding ta e. v l

Figure 3 is a vertical staggered transverse c section through the machine, taken 'as indl- '60 cated at 'line 3-3 on Figure andturn table.

in relative alignment with one o the lower y.

1928. Serial No. 289,034.

the loading mechanism, with the driving pulley broken away.

Figure 8 is a detail view taken through a lower die member illustrating an automatic ejecting mechanism for ejecting a die cast object from the lower die member.

Figure 9 is a view in side elevationof the driving mechanism at the rear end of the machine including the automatic starting and stopping devices.

Figure 10 is a sectional detail view of the lower end of a magazine of the loading mechanism. A

Figure 11 is a staggered vertical4 fragmentary section showing in side elevation the lautomatic driving and tripping mechanism for controllin the movement of the top die member and t e molten metal charging pot,

Figure 12 is a transverse section throu h the automatic trippin mechanism taken su stantially as indicate at line 12 12 on Figure 11.

Figure 13 is an axial section through a ortion of the tripping mechanism taken at ine 13-13 on Fi re 12.

Figure 14 1s a section at Fi re 11.

he machine as illustrated in the drawings comprises. a main base frame, 10, upon which is mounted a rotary eedin table, 11, having drive connection as will ereinafter be described. An upright frame structure, 12, 1s supported onthe main frame and extends upwardly and centrally through a circular opening,` 13 (see Fig. .2) ,v in the rotary tabley 'the line 14.-14 on 11. 'This upright frame includes a pair of laterallyspaced curved overhanging arms,. 12,wh1ch provide guidance and support to a vertically reciprocating top c die-carrying head, 14, to which is secured the top die member, 15, which co-operates with an of the three lower die members, 16 (see Figs. 1, 2, 4 and 6) bolted to the top of the rotary feeding table,11, and spaced thereon at equal angular distances from each other. These lower die members are arranged to be positioned for alternate co-operation with the upper die member, 15, to form a complete mold. The rotary feeding table, 11, has bearin support on the main frame, 10, and is gui ed in -a true rotary path by the circular V-shaped guide-ways, 17- (see Fig. 11), adjacent the opening, 13, while the outer portion of said table is supported by the vertical web 18, adjacent the outer edge and bearing on the flat upper surface of the main frame, as illustrated in Figures 1, 3 and 11. A vertically disposed guard plate, 19, is secured tothe outer periphery of the table, 11, and extends completely therearound.

A longitudinally extending drive shaft, 20, is disposed centrally and 'ournaled in the rearward portion of the mam frame, 10, and is-operatively connected to driving mechanism for. rotating the shaft and automatically stopping the same at each complete revolution. This driving mechanism 1s identical in all res ects with that shown in my copendin` joint application with Walter O. Will, erial No. 85,165, iled February 1, 1926, and a detailed description of the operating members is believed unnecessary except to state in general the function and manner of operation which is as follows:

A transversely disposed power shaft, 21 (see Figs. 1 2 and 11), is journaled at the rear end of the main frame, 10, having a double ulley unit, 22, loosely mounted thereon. Said) pulley unit includes a driven pulley, 22, adapted to be driven by a belt (not shown) from any suitable power source, while the adjacent ulley, 22", of said unit is adapted to provide riving connections to the mechanism'for actuating the top die-carrying head and the metal pot in timed relation, as will hereinafter be described. A friction clutch, 23, is' mounted on said shaft adjacent the pulley, 22", and a brake, 24, on the shaft outwardly of-said clutch; the clutch and brake being co-operative'ly arranged so that when the clutch is normally engaged with the pulley for driving said shaft, the brake 24, is in inoperative position, or when said clutch is disengaged from the pulley the brake is engaged to maint-ain said shaftina stationaryposition. A worm, 25, (see Fig. 9), is mounted on the shaft, 21, meshed with a Worm gear 26, 'secured on the rearward end of the drlve shaft, 20. The drive shaft, 20, is driven intermittently by the worm gear, 26 (see Fig. 1); that is, it is rotated one complete revolution and then stopped, during which period certain operating mechanisms are actuated. The drive 'connection to the shaft, 20, is disengaged automatically so that the shaft becomes arrested after it completes a revolution; this ,mechanism includes a tri ping lug, 27, on the worm gear y26` which) engages an arm, 28, of abell crank piyoted at 29, which throws a latch member `30, into a downward position in a path toabe encountered by an abutment, 31, located on said worm wheel a predetermined distance behind the lug, 27. After the lug, 27, has engaged the arm, 28, the worm wheel continues to rotate through'an arc of a few degrees until it strikes a trip finger, 32, on the lever, 33, pivoted at 34. Through the movement of a lever, 33, a pin, 35, is disengaged from a shifting rod, 36` which is spring tensioned for disengaging the clutch, 23, and actuating the brake, 24, by a shifting fork, 37, whereby to stop the rotation of the shafts, 20 and 21, almost instantaneously. The trip iner, 32, and lever, 33, are positioned so\as to e operated by lug, 27 to stop the rotation of shaft, 21, at a time just before the latch, 30, encounters the abutment, 31.

The lever, 33, yis connected with a control handle, 38, so that the engagement or disengagement of the clutch` and brake for an reason whatever may be manually operate A reset lever, 39, is mounted on the frame and .has a segment, 40, meshed with a rack 40, 95

provided on the end of rod, 36, whereby to draw the same rearwardly under spring tension to disengage the brake, 24, and en age the clutch, 23, with the pulley, 22, for riv- 1ng the shafts, 21 and 20, res ectivel As the rod, 36, is pulled rearwar ly by t e operation of the reset lever, it is a in engagedbythe pin, 35, and held in lockeadriving pos1t1on to'again repeat the cycle. The latch, 30, with its co-operating abutment, 31, serves as a safety device to prevent the worm wheel, 26, from being rotated through more than one revolution at one drivin operation. Ordinarilly; the latch is in aposltion about to engage t e abutment when the trip lu 27, throws the clutch out and enga es the rake to stop the mechanism so that t e latch does not encounter the abutment, 31. The purpose of this latch, however, is to obviate possible damage to the various mechanisms due to the failure of the drive shaft, 20, to stop intermittently after each revolution which may possibly result from wear and tear on the clutch and brake mechanism. It will be understood that after the mechanism is stopped, the resetting or engaging of the clutch again by the operator also resets the bell crank lever with the latch, 30, out of thepath of the abutment, 31, to permit the worm'wheel, 26, to again be rotated. 1-0

The rotary table, 11, with the three lower die members, 16, securedrigidly thereto, isl rotated intermittently through the driving mechanism above describedl in the direction indicated 'by the arrow in Figure 2. It is to be understood that each time the drive shaft',

' viz 20, is rotated through onerevolution vthe rotary feed table, 11, is rotated one-third of a revolution so as to align each of the three lower die members in their respective o erating positions indicated at A, B an C; the period of time between movements of the feed tableI depending entirely-upon the work being performed on the lower die members at these positions beforeithe operator again sets the feedin with the rawings it will be clear that each of the lower die members alternatelyl go through three different stages of o eration, 1) the loading operation indicated at A in Fi re 2 at which the lower die meinber is loaded with the members that are to be die cast in an integral unit; t2) the die casting position indicated at at front cen-l tral position below and in direct vertical ali nment with the top die member, 15, to which position the loaded die members, 16, are transported from the loading osition, A; and (3) the knock-out `an cleanout positions indicated at C, to which final position the lowei'.- die members, 16, are conveyed after the casting operation .at B. The lower die members at C are then cleansed and conveyed to position A to again repeat the cycle.

The machine as illustratedl in the drawings, is especially adaptable for assembling and securing in a fixed relation, a number of plates of an electrical condenser, die casting the plate-retainin metal about a corresponding portion of a l the plates for securing them together as an integral unit. The die members, 15 and 16, forming the com- A, plete mold in which these'plates are inserted are of a conventional design similar tothat disclosed in my Patent No. 1,617,577, issued February 15, 1927. Of course it-is tol be understood that these die members'are provided with the number and shape of openings corresponding to the type of condenser required. The rota feedingtable, 11, is rovided with timed loc ing means hereina r described for engaging the table' at the exact interval and securing it in fixed position so as tpositively align the lower die members at the res ective operating vpositions A, B an 56C.

Referring now to the loading mechanism for the die members, 16, indicated at position A, it will be seenthat the loading mechanism proper is olf-set laterallyl from the rotary table. The entire loadin mechanism is carried in a frame, 45 (see ig. 4), slidable horizontally andradially with respect to said rotary table in suitable ides formed in a frame bracket, 46, extending outwardly from and bolted to the main frame, 10. For production purposes, the die members are formed so that two complete units may be produced at one time. Consequently the table in motion.' In connection provided in the die members, 16, and is ac- Y complished by means, moving the entire loading mechanism forwardly and radially with respect to said table in a step-by-step manner so that the plates are fed to the successive openings in the die members. This mechanism is so arranged that when the last plate is thrust into the die member, the mech-- anism is automaticall stopped and returned to its initial retracted' seen from'Figure 4, the loading mechanism has about half loaded the die memberwith the plates, 48. The plates in the magazines are at all times vertically disposed due to the inclination of said magazine, together with the co-operatin weight, 49, at the upper end thereof, ten ing to force the plates downwardly one-by-one into a compartment, 50 at the lower end of said magazine; the compartl ments being a fairly close lit for only one plate ;.`the lower ends of the side walls of said so as to be struck by a vertically reciprocatin plunger for driving the late into the aligne opening in the die mem er, 16. The plungers for each of the magazines include an impinging late, 52, (see Figure 16), somewhat thinner t an the plates 48, so that it will pass freely between the walls of the compartment. 50. The lower edge of the plate, 52, is cut at 53, to conform to the general contour ofthe ulpper edge of said plates, 48 (see Fig. 5), so t at the thrust may be equally distributed over a relatively wide area.

The reciplrocating plun er' plates, 52, are secured to t e lower ends o supporting arms, 54 (see Fig.` 4), which are pivotally su ported 'at their upper ends to toggle linhs, 55,

which are also `pivoted at 56, on the opposite sides of the forked end of a balance lever,

57, fulcrumed at 58, at its middle to the sliding frame, 45. The opposite end of lever, 5 7,

being pivotally connected at 59, to a pitman, 60, connected to an eccentric, 61, on a horizontally disposed operatin shaft, 62, jour- 'naled in the`frame,'45,an bodily movable therewith. One endI of 'said shaft extends beyond the frame and has a driving pulley, 63, loosely mounted thereon driven by-a belt,

(not shown) from any suitable power source.-

h said pulley. is a clutch member,

position. As may be l iis 7 iso 'course it is to be un with a plurality of relatively smallclutch jaws, 66, spaced closely together so that upon engagement or disengagement the action is almost instantaneous so that the shaft, 62 will be started or sto ped very rapidly. Of dbrstood that a friction clutch of any suitable type might equally well suffice. The clutchI members, 64 and 65 are normally maintained out of mesh b a spring, 67 interposed therebetween on sai shaft, 62. This loadin mechanism is so constructed that the fee mg of the plates, 48, to the openings in the die members, 16, is automatically instituted and takes place almost instantaneously with the alignment of a lower die member therewith by means of lu s, 68, rovided on the outer periphery of t e feev ing table, 11, extending through the guard plate, 19, immediately forward of each of the die members, which lu encounters a horizontally disposed trip er, 69, mounted on a vertical rock shaft, 0, which is loosely mounted in brackets on the outer wall of the frame, 45. This trip finger rocks the shaft, 70, when en a ed by the lug, 68, so that a shiftin for 1, mounted on sa1d shaft is swunglaterally, ca ln the clutch member, 64, into driving mes with the clutch member, 65, a ainst the reaction of sprmg, 67, for setting t e -loading mechanism into operation, which action is almost instantaneous with the aligning of the die member with said loading mechamsm.

A face plate, 75, is mounted on the shaft, 62, opposite the end at which the pulley, 63,

is secured, said plate having pivotally con-y nected thereto, off-center, the end of a pitman, 76, the opposite end of which is .forked and pivotally secured to the bifurcated lever arm, 77, which is loosely mounted on the cam shaft, 78; said shaftis j ournaled in the frame, 45, rearwardly of the'o erating shaft, 62. A spring-actuated pawl, 9, su ported on the pivot in, 80, intermediate t e forked ends of. sai lpitman and lever arm engages the teeth of a ratchet,"81, keyed on the o uter end ofthe'cam shaft. A cam, 82 (see Fig. 6), is mounted on `said shaft, 78, centrally with res "ct t0 the frame, 45, the outer surface of sai cam being progressively increased and positioned for engagement by a roller, 83, carried on the end of an adjustable supporting screw, 84, mounted in the end of the bracket, 46. It will now be clear that for each revolution of the drive'shaft, 62, the reciprocating plunger will thrustfa plate, 48, into an opening 1n the .die member while the cam shaft rotates only a partial revolution, an amount which depends on the spacing of the teeth on the ratchet,'81,(which is directly proportional to the increasing cam surface, so that the thrust of the cam against the roller, 83, feeds the entire loading mechanism and frame, 45, forwardly a predetermined amount so that the plates, 48, will be successively aligned with the respective openings in the die members, 16, for loading therein by the reciprocating plunger. The timed relation of the plunger and the feeding horizontally of the complete mechanism on the bracket, 46, ensures exact positioning of the plates, 48, at the time they are encountered by the plunger impinging plate, 52.

It is to be understood that the number of plates to be secured together as aunit may vary to suit the individual requirements; the die members, of course, having a number of late-receivine` o enin s corres Ondine' to the number of plates to be formed as a unit in an electrical condenser. The cam shaft, 78, will be rotated a fraction of a revolution, at each rotation of shaft, 62, corresponding to the number of plates to be driven into a die member as a condenser unit; that is, for example, in a ve-plate unit, the cam shaft will be rotated in intervals of one-fifth of a revolution, the cam, 82, being progressively designed so that for a complete rotation, the entire mechanism has been fed forwardly the exact distance at timed intervals corresponding to the spacing of the plates. The number of teeth on the ratchet, of course, will correspond to the number of plates to be fitted in the die member. It will be clear that any change in the number of plates to be assembled in a die member will require the resetting of tlle'position of roller, 83, with its adjusting screw, 84, -as well as requiring a'cam and ratchet member corresponding to the change in the number of plates for assembly in the die memberin order that the feeding movement of the entire mechanism by the cam on the roller, 83, will properly align the plunger for. driving the plates into the openin s of the die members, 16.

he design of the cam must, of course, be such that the initial feeding point is approximately radially aligned with the final or high point, which is the end of the forward feeding movement of the mechanism; and the return from the final position to the initial position on the cam takes place just prior to the stopping of the complete mechanism by an automatic means hereinafter described. i

Instantaneously with the change in the contact from the final to the initial position on `the cam with the roller, 83, the entire loading mechanism is slid rearwardly on the bracket,

446, to the starting position by means of a' spring, 85, disposed on a screw, 86, which is secured at one end inthe bracket, 46,- the opposite end having sliding sup ort in a lug, 87, on the under side of the rame, 45, which abuts against the,.spring so that as the 'mechanism is fed forwardly by the cam engaging the roller, the .springis gradually compressed, and as soon as the change in the cam-engaging surface from flnal to initial position with the roller takes place, the spring messes loading mechanism, also sets an automatic tripping device for stoppingthe mechanism after the last plate has been thrust into the die member. This dcv'icc comprises a horizontallv disposed lever arm, 90, secured at one end on a vertical rock shaft, 91, which .is

supported in brackets on the side of the frame,

; the opposite end of said lever being engaged by a trip dog, 92, on the sha-ft, .70,-

which, when the trip finger, 69, is in position to be engaged by the lug, 68, maintains the.

lever in psition against the frame 45, as shown 1n igure 6, reacting against a spring,

'93,- interposed between said lever and the frame, 45. A lever arm, 94, is secured to the upper end of the rock shaft, 91, having a roller, 95, at its free end for engagement with a tripping lug, 96, provided adjacent the outer edge of a rotary late, 97, which is secured adjacent the end o the cam shaft, 78, at the end opposite said ratchet. Normally, when the mechanism is idle, the lever, 90, is held in place by means of the dog, 92, the rock shaft, 91, being positioned so that the roller on the arm, 94, is' spaced laterally out of the ath of engagement from the lug, 96, on the p ate, 97. This trip lug, 96, is so vlocated on the .plate, 97, and aligned so as to be engaged by the roller, 95, when thel cam shaft, 78, completes a revolution, which isalso the time atI which the last plate is driven into the die member, 16. It will be understood that when the trip finger, 69, is operated through engagement with the lug, 68, on the rota table,

the shaft','70, will be rocked so that t e trip dog, 92, wi'll be swun laterally to permit the engaged end of the ever, 90, to swing outwardly by the spring, 93, and held in position on the upper side of said dog by' a lug, 92, formed thereon; Athe movement oA the ever, 90, rocking the shaft, 91, thereby actuating the lever, 94, and swinging the same laterally,

bringingv theroller, 95, into the path of engagement of the lug, 96, on the plate, 97, which action takes place when the mechanism j has been fed .forwardly -to .the limit of its movement by the cam, 82, which is also the` time said cam completesfa revolution. By the engagement of the roller, 95, with the lug, 96, the shaft, 91, through the lever, 94, 1s rocked in'oppositev directlon so that the lever, 90, is swung inwardly toward the frame, 45, against the reaction of the spring, 93, the trip dog, 92, then returning to engage the end of the lever, 90, tohold it in'place due tol the spring, 67, forcing the clutch jaws, 64 and 65, out of mesh, carrying the shifting fork, 71, laterally, rocking the shaft, 70, onl

to the initial operating position for .carrying the entire mechanism rearwardly by the compressed spring, 85..

A v ocket, 98 (see Fig. 2), is formed in the circu ar guard plate, 19, of the rotaryY table,

11, immediately rearward of the lug, 68, to provide clearance for the trip n er, 69, as 1t is carried forwardly with the loa 'ng mechanism during operatlon.

' .Referring now to the driving mechanism for rotating the table, 11, so as to feed the lower die members, 16, which are loaded at the position indicated at A, tol position B, for assembly with the to diemember,

15, to make a complete mold or the casting operation at which` time the die members.

at B and C are conveyed to the positions C and A res ectively; a gear, 101 (see Fig'.l 2) is secure meshed with an idler gear, 102 (see ig. 10), loosely mounted on a pin, 103, journaled 1n the main frame, said 1dler gear being o eratively meshed with a ear, 104, secured on a ournaled in the main frame, 10, said shaft eing parallel to and in vertical alignment with the drive shaft, 20. A beveled pinion, 106, is mounted adjacent the rear end of the shaft, 105, in driving mesh with a beveled gea'r ring, 107, bolted to the under side of the rotary table, 11, for rotating the same. .Itwill be understood that `the 'gearing for the rotary table is so proportioned that for each revolutionof the drive shaft, 20, the table is rotated one-third revolution. The shaft, 20, which isy operated by driving mechanism hereinbefore described, is automatically stopped intermittently at each complete revolutlon. The positionin die members, 16, on the ta le are in coron the drive shaft 20, and

longitudinally extendmg stud shaft, 105,

of, the lower,

responding arrangement so that the table,

once stopped, aligns the diev members with the respective operating mechanisms at A, B and (3. The table is a ain-set in motion at will by the operator y resetting of the lever, 39, of the driving mechanism to again rotate the shaft, 20, through a complete revolution. A bracket, 108, is secured' by and inA timed re The casting operation, which takes place at the position indicated at B, consists in bringing together the top die member, 15, and the lower die member, 16 (see Fig. 3), aligned therewith, forming a complete mold. 'lhese die members remain together for a period of time during which molten metal is 1njected therein under pneumatic ressure as will hereinafter be described. t is to be understood that the actuation of the die members for closing and opening the mold takes place in a proper timed relation with the injection of the metal in the mold, said movements being caused by a lcommon automatically actuated driving mechanism, which also controls the starting and completion of these movements in exact timed relation to the feeding movement of :the rotary feeding table, 11. This mechanism includes a longitudinally disposed operating shaft, 115 (see Fig. 1), journaled in bearing brackets, 116, secured to the outside of the frame, 10, disposed parallel to shafts, 20 and 105, and extending the length of said frame, 10. The drive to the shaft, 11,5, includes a belt, 117,

trained over pulley, 22", which is part of thev pulley unit, 22, loosely mounted on power shaft, 2l, thence over a pulley, 118, mounted on a stub shaft,.119 (see Figs. 1, 3 and 9),q

which is supported in a frame, 120, secured to the side of frame, 10, adjacent the rear end thereof. A pinion, 121, is mounted on shaft, 119, operatively meshed with a gear, 122, on a stub shaft, 123, lournaled in the frame, 120, and in bearing racket, 116, and extending above and parallel to the shaft, 119. The shaft, 122, extends inwardly of the bearing bracket, 116, and has a pinion, 124, secured on the end, operatively meshed with a gear, 125, loosely mounted on theo eratin'g. shaft, 115, for drivin the same intermittently. The operating s aft is set in operationto complete a revolution, and then stopped by an automatic tripping mechanism actuated ation with the drive shaft 20.

This tripping mechanism includes an o l erating cam, 126 (see Fi 12), keyed on t e drive shaft, 20, the cam ing engaged by a roller, 127, carried on the end of a lever-arm, 128, of a bell crank fulcrumed at 129, to an extension of the frame, 120, the other arm, 130 of the bell crank beingpivoted at 131, to an upright tripping dog, 132,.which is yieldingly urged forwardly b a spring, 133, wrapped about said pivo connection, 131.

The roller, 127, is yieldingly held in contact ring, 134, reactin against the arm, 128. s'ghe trip ing dog co operates with a pin, 135, exten g laterally from a latch member, 136, ivoted at, 137, and extending into the path o engagement with a co-operating groove, 138, formed in a driving plug, 139, carried in a driving collar, 140, which is keyed to the shaft, 115, adjacent the with the cam -by a gear, 125. Said plug is urged outwardly of said collar by a reacting spring, 141, tending to force said driving plug 1nto a ertures, 142, in the gear, 125, for drlving t e-operating shaft, 115. The latch member, 136, is also yieldingly urged upward by a'spring, 143, for engagement in the groove of the driving plug. It will be understood that the cam, 126, is so positioned on the operating shaft, 20, that when said shaft is stopped after com leting a revolution, as hereinbefore describe (which stops the feed table in proper aligned positions) the initial high point on the cam surface, indicated at 126, is aligned with the roller, 127 andA the arrow on the cam is aligned verticall at a osition in t e plane of the vertical axis of sald cam; so that the tripping action commences almost instantaneous `with the" stopping of the drive shaft, 20. It will be clear from the drawings that when the roller, 127 is moved laterally by engagement with the high cam surface, the bell crank is rocked backward, drawing the trip dog 132, downwardly, which also carries the latch member, 136, by its pin, 135, out of engagement with the groove in the driving plug, thereby permitting said plug to be projected into driving engagement with the gear, 125,l by its spring, 141, for rotating the shaft, 115.

A trip lu 144, is provided on the periphery of the riving collar, forwardly of the driving plug, in the path of engagement with the tripping dog, 132, so that very soon after said shaft is set in motion the lug, 144, impinges a inst the trip dog, 132, forcing it rearwar y to free the pin, 135, and permitting the latch member to be forced u ward by the reaction of the sprin 143, w1th its knife edge, 136, aligned in t e path for engagement in the groove, 138, of the driving glug, 139. The knife edge on said latch is so esigned that as it engages in the groove of the plug it forces it out of driving mesh with the gear, 125, against the reaction of spring, 141, thereby stopping the shaft, 115. The shaft, 115, which operates at a relatively slow with the arrow indicated speed, will stop almost immediately upon the withdrawing of the driving plug from the gear, due to the load onthe shaft. The tripping dog, 132, remains out of o rative osition until the drive shaft, 20,12; againpoperated, due to the osition of the roller on the cam, 126. It wil be seen that for a period after shaft, 20, is rotated, the mechanism remains in an in-operative position until the eration bythe time the initial high point,

126 aligns itself under roller, 127 when the shaft, 20, is again stopped.

Referring now more particularly to the Weense mechanism for actuating the top die carrying-head, 14, for closing and opening the mold (see Figs. 3 and 1,1), a peripheral cam, 150 is keyed on the operating shaft, 115, cooperating with a vertically disposed lever, 151, mounted on'a rocking pin, 152, journaled in the web of the mainframe. Said lever having a cam roll, 158, on'its lower end, engaging in the peripheral groove, 154, of the cam, 150, for oscillating longitudinally a lever arm, 155, secured on the opposite end of said pin, 152. Pivoted to the end of arm, 155, isa horizontal toggle arm, 156, which is also pivoted to the lower end of a lever arm,. 157; said lever arm is'mounted on the end of a transverse rock shaft, 158, journaled in the upright side portions 12, of the frame, 12. An upwardly extending lever, 159, is mounted on said 'shaft intermediate the frame side portions, 12, and is pivoted at its upper end to an actuating link, 160, the opposite end of which is pivotally connected at 161, between two pairof toggle links, 162, and 163, respectively. vThe upper links, 162, being in*-v tegral at their upper end and mounted on a pin, 164, journaled in the upper ends of the side frames, 12, while the lower links, 163, overlap the links, 162, at the pivot connection, 161, the opposite ends of said link being vpivoted at 165, to the top die carrying-hea 14. The -top' die carrying-head is provide with guide ribs, 166, on opposite ends, slidable vertically in guide ways, 167, formed on the inner sides of the frame sides, 12, so that the top die carrying-head with the top die` member, 16, may be vertically reciprocated in a true path for co-operation with the aligned die member, 16, for closing and opening the mold, by actuation of the linkage by the cam, 150, as described. The cam, 150, is so de# signed as to cause the linkage controlling the movement of the top die member to remain stationary for a certain period, after the top die member, 15 closes onl the lower die member, 16, while said cam continues to rotate, during which eriod the die members remain in closed position to allow time for charging the mold, and permit the metal to set before the linkage connection is again actuated to raise the top die member-opening the mold'. Mounted on the main frame, 10, forwardly of the'top die headis a reservoir or pot, 170 (see Fig. 1), for molten metal, provided with a conventional heating means, the details of which forms no part of the present invention: The reservoir is connected with toggle links, 171, on opposite sides of the main frame, on

J which said reservoir is carried to and fro in timed relation with the closing of the die members, 15 and 16, so that the nozzle, 172,

will be moved into registration with the die peripheral cam, 174, on the end of the shaft, I

frame, 10. An upwardly extending lever f arm, 179, is carried on the rock shaft, central with the'machine; said lever is forked at its upper end to straddle a pusher bar, 180, pivotally connected to and centrally aligned with the reservoir, 170, for moving the same to and fro on the toggle links, 171. The cam, 174, is also designed to permit an idle period, that is a period at which the reservoir remains in charging position with the mold.

Automatic valve control mechanism indicated generally at 181, is timed from the shaft, 115, so that the metal will be injected into the mold at the exact time under pneu-- matic pressure. This valve construction and pneumatic control mechanism neednot be de'- scribed, as they are of a similar type as that illustrated in my co-pending joint application with Walter Will, Serial Number 85,165, filed February 1, 192

Referring now to the operation which takes place at the position indicated at C, it will be understood that the die cast object will lremain in the lower die member when the same is conveyed from the positlon B to C, at which point automatic means knocks the object loose in the lower die member for removal by the operator. The automatic means includes la lever arm, 185 (see Fig. 8), extending transversely across the center of the die member, 16, on the underside thereof, in a cavity, 186; said lever being pivoted at 187, at the outside edge of said die member to swing vertically and having a cross arm, 188, extending transverse to said lever near its center, carrying at each end vertically extending pins, 189, aligned with the two separate die portions of the die member, 16, and

tted in openings formedin the underside of.

the mold, extending into the die proper for movement therein to eject the die cast object from the mold. The free end of the lever arm, 185, is providedl with a roller, 190, adapted to normally rest on the table, 11, when in all positions except when aligned at (l. The roller carries the lever, 185, in such a position that the upper end of the pins, 189, extend in exact alignment with the bottom of the die, so that it really serves as a bottom for certain openings in the die members16, when the plates,l 48, are inserted therein. .Aligned at position C, is a bracket, 191, secured on the upright frame, 12, provided with a cam, 192, extending into the path of movement of the roller, 190, so that as the lower die member is approaching position C.the roller rides up on the cam, 192,

thereby moving the pins, 189, upwardly env gaging the lbottom of the plates of the' condenser and bodily ejecting the die cast object in an upward direction to be removed by the operator. As the die member at C is started in its movement to position A, the lever and roller with the ejecting pins are again returned to their normal position, after passing over the cam surface on the opposite end of the cam, 192.

For convenience, the operator would stand on the side of the machine adjacent position C, so that the machine may be controlled by the reset lever, 39; the operator at this position has suiicient' time to cleanse the lower die member, 16, at C, and remove any .foreign matter while the other operations are being performed at A and B..

Although the driving connections to the rotary feeding table, 11, are such wthat the table will be intermittently rotated through one-third revolution, it is desirable to posivtively align the lower die members at theirv during the operations at these positions* This locking mechanism comprises a horizontally disposed locking pin, 195, slidable in the main frame and adapted to be registered in any one of the three openings, 196, provided on the inner periphery of the table, 11. These openings are aligned with each of the lower die members, so that when the pin is locked in engagement with any of said openings the die members are aligned at positions A B and C, and fixed in place until the table is again rotated. The pin, 195, is pivotally connected to a toggle link, 197, pivoted to a carrying arm, 198, secured to a vertically movable guide rod, 199, slidable in the frames, 10 and 12, as illustrated in Figure 11. The lower end of rod, 199, is connected to a carrier, 200, movable vertically with the rod, 199; the lower end of said carrier being)1 forked and guided in grooves of a guide ock 201, loosely mounted on the drive shaft, 20. Said carrier, 200,'is provided with a cam roll, 202, guided in a cam groove, 203, in a cam, 204, mounted on the shaft, 20. Thus it will be clear that due to the rotation' of the cam, the guide rod, 199, is vertically reciprocated to move the locking pin in and out ofre tration with the openings, 196, inthe tab e. Of course it is to be understood that the cam groove is soshaped that the actuation of the locking pin is erformed very rapidly.

ince the drive connections for the rotary table and loclng means are from the common drive shaft, 20, it is desirable that the lock pin is thrown into engagement after the table is stopped rotating, and out of engagement prior to the starting of the table.

This arrangement may be accomplished by providing the gear, 101, of a certain diameter eater than necessary for the exact speed reduction to drive the table lution to each revolution of the shaft, 20. The number of teeth on said gear in excess to that required normally for the exact reduction, being omitted to form a sin le openin the diameter of the gear at t is point being the root diameter of the teeth.- The gear is so -positioned on the shaft, 20, that when the mechanism is started for causing 'rotation of the table, the gear will rotate through a certain number of degrees with the open peripheral portion aligned with the idler gear, 102, before the teeth of said gear, 101, mesh with the idler gear, for rotating the table, during which time the cam with its connections draws the locking p in, 195, out of registration with the table.,\ And vice versa, the driving connections to the table are completed slightly before shaft, 20, completes a revolution and the table,vf 11 is stopped, a portion of the opening formed by the omitted teeth in gear, 101, again being aligned with the idler gear, 102, and during this continued short period of rotation of said gear and shaft, 20, the cam mechanism throws the locking pin, 195, into registration with the aligned opening for locking said table in the aligned position.

Heretofore in machines for the purpose, which this machine is especially adaptable, the die members were loaded by a se arate machine, as shown in my patent, herein efore referred to; the loaded die members then being manually handled for operation. in a die casting machine of a usual type,- as for example, similar to that shown in my copending joint application, hereinbefore referred to; the die members then being again handled for removal of the castings and cleansing the mold. These operations rethe operator. The operation of a machine as herein described is continuous and will effect greater .production and increased economy.

I claim:

1. In a machine of the character described, the combination of a main frame, conveying means supported by said frame, a die member carried by said conveying means, a movable head carrying a co-operating die member, and positively actuated means for stopping said conveying means at a predetermined point with said die members in exact alignmentl with each other.

2. In a machine of the character described, the combination of a main frame, conveying means supported by said frame, a die member one-third revomeans for stopping said conveying means at llt a predetermined point, alignih said die members, and means automaticaly actuated in timed relation to said stopping means for actuating said movable head and co-operating means supported by said frame, means for` automatically stopping said conveying means at a plurality of predetermined points along its path of travel, die members mounted on said conveying means positioned for successive alignment at each of said predetermined points with a movable head supported on said frame carrying a co-operating die member,

one of said predetermined points being posi-- tioned so that the co-operating die member is aligned with one of the die members on the conveying means, and means controlled at will for moving said conveying means whereby said co-operating die member is aligned with the successive die member positioned at the next predetermined point on the conveying means. v

5. In the combination defined in claim 4, automatically actuated means operated in timed relation with the said stopping means, for carrying said movable head and co-operating die member into die closing and opening positions with respect to the aligned die memer on said conveying means.

6. In a machine of the character described, the combination of a main frame, a feeding table mounted for rotative movement on said frame, means for automatically stopping said table at a plurality of predetermined polsitions, die members mounted on said table positioned for successive registration at said predetermined stopsy with a movable head supported on the frame carrying a co-operating die, means automatically actuated in timed relation upon the stopping of the table for bringing the co-operating die member into die closing and opening positions respectively with the aligned die member on the table, and co-operating means for injecting molten met-al into said die while in closed position.

7. In a machine of the character described, the combination of a main frame, a feedin table mounted for rotative movement on sai frame, means'for automatically stoppingsaid table at a plurality of predetermined positions, die members mounted on said table positioned for successive registration at said predetermined stops with a movable head supported on the frame carrying a co-operating die, means automatically actuated in timed relation upon the stopping of the table for operation.

bringing the co-operating die member into die closin and opening positions. respectively with t e aligned die member on the table, cooperating means for injecting molten metal into said die while in closed position, and means controlled. at will for again starting said table in motion, whereby the next successive die member on said table is aligned at the predetermined stopping point with the cooperating 8. -In a machine of the character described, the combination of a main frame, a feeding table mounted for rotary movement thereon, means for stopping said table at a plurality die member to repeat the cycle of of predetermined positions, die members on v said table, positioned for successive alignment at such stops with a movable head supported in the frame, carrying a co-operating die member, means timed with the stopping means of the table for moving the co-operating die member into and out of die closing` position with the die member on the table alivned therewith, andmeans for locking the table to the frame, when the same is stoppedat the predetermined positions. 'p

9. In the construction delinedy in claim 8, said molding means comprising a locking member and means for moving it into and out of locking position, associated vwith the table-stopping means for operation by the latter for locking approximately coincidentally with the stopping of the table.

10. The construction defined in claim 8 having the locking means comprising a locking member and means carrying itl into and out of locking position; actuating means for moving said carrying means operatively associated 'with the table-stopping and starting means for causing the locking member to be carried into and out of locking position approximately coincidentally respectively with the stopping and starting of the table.

11. In a machine of the character de-f scribed, the combination of aframe, a feeding table mounted for rotary movement thereon, means for stopping said table at. a plurality of predetermined points along its path of movement, die members mounted on the table, loading means adjacent one of said stopping points, aligned successively with the die members on the table during its stops for loading parts into said die members that are to be included in the finished casting, and means controlled at will for starting the table rotating to carry the loaded die member into alignment with the next predetermined sto point and aligning another die member wit the loadingmeans.

,12. In a machinel of the character described, the combination of a frame, a feeding table mounted for rotary-movement thereloading means adjacent one of said stopping rs on the table during its stops for loading parts into said die members that are to be included in the finished casting, means controlled at will for starting the table rotating to carry the loaded die member into ali ent with the next predetermined stop point and aligning another die member with the load ing means, a movable head supported in the frame aligned vat a predetermined stoppingv pointon the table beyond the loading means, said head carr ing a co-operating die member aligned wit theloaded die member at the predetermined stoppin oint, and means timed in co-relation. wit t e stopping means for the table for bringing the co-operating die memberinto die closing and openlng osition with respect to the aligned loade die member on the table.

13. In the combination defined in claim 12, means operating in timed relation with the means for closing and opening the die adapted to inject molten metal into said die while in a closed position.

14. In the construction defined in claim 12, means for injecting molten metal into the die at closed position of the latter, the means for opening and closing the die comprising a part arranged to co-operate with the metal-injecting means for injecting the metal into the die, the operatin connections of said co-operating parts' wit the die opening and closing means and with the metal injecting means respectively being relatively arranged on said co-operating parts for actuating the metal injectlng means intermediate the closing and opening movement of the die.

15. In a machine of the character described, the combination ofa main frame, a feeding table mounted for rotary movement thereon, means for automatically arresting the movement of the table at a plurality of redetermined points, die members carri by the table and positioned for successive alignment 1.6. In the construction deined in claim 15, in combination with the parts co-operating for ejecting and the parts co-operating for arresting, the rotation of the table, eing formed for timing the ejection of the casting to cause it to be completed before the arresting of the table occurs.

17. The construction defined in claim 2, said head actuating means comprising a rotative cam having a substantial part of its camming extent formed for holding said diemembers in closed position for a redetermined period, and means automatica ly actuated in timed relation to said die closing means for injecting molten metal into said die when in closed position.

In testimony whereof, I have hereunto set m hand at Chicago, Illinois, this 20th day o June, 1928.

ERIC CARLSON.

with automatic means at one of the sto ping points for loading the aligned die mem er on the table, means controlled at will for rotating said table to align the 'die member at the next successive arresting point with a head, movably supported int e frame beyond the loadin means, said head carrying a co-operating ie member, means timed in co-relation with the arresting means for the table for carrying the co-operating die member into and out'of die closing position with respect to said aligned die member on the table, means timed with the die closing means for injecting molten metal into the die while in closed position, said die member on the table being moved to and aligned at a predetermined arresting point beyond the casting point, and automatic means operating adjacent said last named arresting pomt for loosening and ejecting the die cast object from said die member.

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