US1663072A - Die-casting machine - Google Patents

Description

March 20, 1928.

" w. J. DURING DIE CASTING MACHINE 5 Sheets-Shae; 1.

FilQQ April 25, E925 .March 20, 1928,

W. J. DURlNG DIE CASTING MACHINE r and their mechanically effected, and therefore posi-- Patented Mar. F20, 1928.

WILLIAJMI J. DURING,0E SYRACUSE, NEW

YORK, ASSIGNOR rro rnnorsron cas'rmesf COMPANY INCORPORATED, OF F AYETTEVILLE, NEW YORK, A GORPJORATION 01 NEW YO K.

nm-cas'rrive nmcnmn Application filed April 23,1925. Serial No. 25,301. a

This invention relates to a' certain new and improved die-casting machine.

The main objects of the invention arethe production of a die-casting machine of strong and durable construction that is rapid and automatic in its operation of producing castings, and in which the closing of the dies maintenance in closed position is tive, and certain, and in which the sequence of the various steps in the operation of pro ducing a casting is accurately timed, due to the particular correlation of the several actuatmg means.

A further advantage of this invention re- .sides in the particular structure whereby the dies are moved to' andv from the nozzles and to and from each other'at particular related times and positions of movement.

A further advantage resides 'in the production of a structure whereby a saving and economy of fluid under pressure utilized for fOI'ClIlg the molten metal from'the pot into nally'of the frame the dies is effected.

Other objects and advantages relate to the details ofv the structure, all as will more fully appear from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a top plan view of the machine. I

Figure 2 is a longitudinal sectional view online 2-2, Figure 1.

I main shaft the 5 of the mechamsm Figure 3 is a lateral sectional view on line 33, Figure 1. .7

Figure 4 is a vertical sectional view through the plug for closingthe inlet opening to the pot, taken on line 4=-4=,.Fig. 1.

Figure 5 is a sectional view on line 5-5, Figure 1. 1

Figure 6 is a section on line 6-6, Figure 2. Figure 7 is a section on line 7-7, Figure 1. Figure/8 is a vertical section through the drum including the valvethe valve chest and valves for controllingl the fluid t e molten Figactuating cams under pressure which forces metal from the pot intothe dies.

F18gure9 is a section on line 9-9, ure H e small gear 22 being Figure; 10 is a section on line 10' 10,- Figure 8.

Figure Figure 8.

The machine as here illustrated comprises a main frame 1-'of substantially rectangular "form and supported at its corners by legs and feet 2, 3, 4 and 5, the legs being connected by longitudinal side rails 6- and end rails 7--,- and the side rails are connected together at intermediate points by cross rails ,8'- and 9- to form a rigid structure. n

The furnace may comprise a separate casting 100-. of substantially rectangular form and supported at its four corners by legs and feet -11, -12-, -13 and -11-,-two legs adjacent the main. frame -1 being rigidly secured to the main frame by bolts 15- so structure is rigid with structure.

11 is a section on line 11-11,

in the end-walls --7 and the intermediate cross-walls -8--, and

that the furnace. the main frame 9, and it may, asshown, be provided with end-thrust bear four ings'to facilitate its rotary movement when 4 end thrust pressure is applied to it.

The main shaft may be able manner, as for instance by worm gear 16- keyed to the shaft and meshing with worm -17'- on shaft -18.- at one end a portion of a clutch-element -19-, the other portion of which element is carried by shaft -20-- journaled in the frame -1-, and carrying the gear -21 keyed to it meshing with the small gear -22 mounted on the stub shaft .-23-, integral with the larger gear --23'- which meshes with the comparatively small gear -24- on the armature shaft 25- of motor 26-.

driven in any suitwhich carries It will be obvious that the reduction gear-f ing described is illustrative of one means for driving the shaft -10- at a desired speed, preferably considerably lower than the speed of the armature shaft, and that the clutch 19- is interposed so that an operator may at will disconnect the main instance through the medium of a lever link 29- to a posite sides of the cylinder,

ment of the-clutch driving or non-driving -27 connected by rock-arm 28 and yoke 30-fi slidable on cross-bar 31 and engaged with one elefor moving the same into position in a usual and well-known manner. '1

The main shaft l0 carries near its central portion a drum-can'i '32. This drum-cam, as. perhaps best illustrated in Figures 2 and 7 is of cylindrical form, and

has a groove or channel 33 formed in its surface. I Theportions -34- of the groove near the opposite ends of the drum extend substantially circumferentially of the drum, and are of a desired length preferably substantially as illustrated, and these end-pow tions are connected by diagonal longitudinally extending portions -35 upon op and connecting the endportions 34 to form a continuous groove or channel, within which the drivepin ring -3G- is )ositioned, the ring being of a diameter su stantially equal to the width of the groove or channel 33, the latter being of substantially uniform. width throughout its lengt he drive-pin ring, as shown, is mounted upon the reduced cylindrical lower end-portion of avdrive pin -37, which pin extends through a vertical opening in plate-member 38 constitutingv a portion of.a sliding carriage 39, and the plate member is formed with a circumferential recess in its upper portion for the reception of an enlarged head on the drive-pin. The other 'member of the sliding carriage consists of a second plate-like member 105 having vertically-extending side rails 102 and 103 and connected at t leir forward ends by the tailstock'104. The plate member 105 has a central elongated slot 106 of a width and length sufficient to permit withdrawal ofdrive-pin -37- in any position of adjustment of the two plate-members -38- and 105- of the sliding carriage, which adjustment is permitted by the bolts 130'aud 131 extending through openings in the plate 38 that substantiallyfit-the bolts and through respective slots 107 and 108 in the plate 105.

By means of this construction, it is only 5 necessary to drop the drive-pin into the o enin in the slidiiw carria e -3S- and 2: h is its lower reduced end will projectthrough the ring in the groove and the formed on a slide 'illiS purpose the opposite edges of the plate drive-pin ring is easily removed to separate the carriage'39 from driving relation with the drum -32.-. i

The sliding carriage -39- has its opposite edges slidable in under-cut channels or grooves formed by the inwardly and upwardly inclined flanges -40- and 41 member 42' and for member 105 which llG'OHLSidG of the plate 38, are inclined downwardly and outwardly so as to fit beneath the over-hanging portions of the flanges 40 and -tl,;

In order to maintain a-frictionally tight engagement of the sliding carriage 39- ing the frictional engagement su-fliciently tight to effect the operation hereinafter described.

The slide '42 moves lengthwise of and upon the upper surface of the frame '1 between the opposed vertical flanges -45 and 46 and with its opposite edges beneath the respective confining bars 48' and -49- secured to the flanges 45 and -5t6 respectively by means of'bolts -50-- and -51- respectively. The slide 42 hasa longitudinal slot or opening of a width adapted to receive and permit relative sliding movement of the conical depending portion -52 on the plate-member 38 through which the driving pin 37 extends. In order to mainta n the slide 42= in the desired tight relation with respect to flainges-- 45 and 4l(i a wedge member 53 may be interposed between the flange -45- and the adjacent edge of the slide -42 and set screws 54.- may be provided extending through the flange 46 for contact with the wedge 53 for mainlUl) taining it in desired relation with respect to the slide The tail-stock 104 has secured to it a diecarrier 55-"to which one of the dies 5G may be secured in any'well known manner. The other die section -57 may be secured to the bolster plate 58- in any suitable manner, and has an inlet port 59 aligned with the gate member 60 carried by the bolster-plate 58;

This bolster-plate may, as shown, he se-' eration of the machine, as hereinafter dc scribed.

' The pot is further provided with an inlet for metal normally closed by means of a clo-' sure-plug -67 which is held to its seat or released for removal by means of cam -68- formed on a rotary roll or shaft 69- pot rests upon and is secured to a plate llu equipped with an operating handle Pipe --71- is provided for conveying fluid under pressure, such as'air, to the pot for ejecting the molten metal therefrom into the die at predetermined intervals when the die is in proper relation, and a baflle 72- is provided for rendering the application of pressure more uniform.

The means for automatically controlling the supply of fluid under pressure to pipe --71 and the pot 63' and for permitting the discharge of fluid under pressure therefrom at predetermined intervals, and for effecting a material saving ofthe fluid under pressure consists as here illustrated in a cylinder 73 mounted upon the main shaft 10 and carrying three cams -74-, 75' and 76- adapted respectively for actuating valves -77-, 78-'- and -79 arranged in the valve-box -80. This valve box 80- is formed with three valve chambers 81-, 82 and -83 for receivingthe respective valves ,77-, '-78 and -79 and with a passageway 84+- in communication with each of the valve chambers.

-81, --82 and 83-' under control of their respective valves. Further, the pas sage -84- is in direct communication with the pipe -71- leading to the pot -'63-'-. The chamber 8 1 is in communication with the pipe 85 leading to the reservoir -86-- for uid under pressure and inwhich fluid is adapted to'be forced under desired pressure by pump 87. The chamber -82 isat all times in communication with the pipe -71 and the valve 78 controls communication between the chamber 82 and the pipe 88 which penetrates the valve-box 80 above the valve 78 and leads to a relatively,

low-pressure reservoir ortank 89 for communication with a low pressure pump '-90 through pipe 91 and high pressure pump 87 through pipe 92. The valve chamber 83 is at all times in communication with the pipe 71 and the valve 79 controls communication between the chamber 83 and pipe 93 which penetrates the valve-box 80 and is at all times in communication with the atmosphere.

For the purpose of effecting the desired operation, the cam .74 has a valve-operating projection 94 of comparatively short circumferential length, and'the cam 75 has a similar projection 'of a perhaps slightly greater circumferential length, while the cam 76 has a circumferential projection extending throughout a considerable portion of its circumference.

' length of time,

This construction results in the fact. that valve 77 is maintained open for a com aratively short length of time. Valve 8 'is maintained open for a slightly greater while valve 79 is maintained open a comparatively long time, thereby effecting the operation hereinafter described.

through a portion of the die-carrier -55 against the ,plate 112.

The apparatus here shown comprises a means for automatically ejecting a casting from the die 56- in the form of a rack 110 extending through the tail-stock 104 and for securement to a plate-member 111 hav- 'ing a second-plate member 112 secured to it in any suitable manner,,andcarrying a series of ejecting 'pins 113 which extend through-the other portion of the die-carrier --55- and through'the die -56. Loose pins are also-provided which extend through the die -56 through the forward portion of the die-carrier -55', and normally abut The rack 110 is mounted in a pedestal by a gear 116 mounted on or formed integrally with a shaft 117 journaled in the opposite walls 102 and 103 of thesliding carriage as illustrated.

A second pedestal -118-- is bolted at the rear of the machine to a'cross-plate 119 secured to the frame and carries in a split bearing an adjustable stop-bar 120 longitudinally aligned with the rack -'1'10- so as 80 115, and is actuated 9 to limit the rearward movement of the rack,

separated a predetermined amount. The

rack may, however, be hand-operated when desired by means of crank 140, The movable pins 114, when the dies are brought together, contactfwith the die-section 57 and return the pins 113 to their original position if that has notbeen automatically effected during previous movement of the machine parts. The bolster-plate -58 may be cooled,-as by Water flowing through an an nular jacket -122-- on the face of the plate, the jacket beingprovided with flow and return pipes 123 and 124. I

The operation of the machine will be understood from the following:

' 'With the motor in' operation and the clutch engaged, and parts of the machine in the position illustrated in Figure 2, as the cam 32 rotates with the drive-ring 36- in the. cam groove, the carriage 39 will be moved forwardly carrying with it sliding member 42 upon which the bolster-plate 58 is mounted, this simultaneous movement resulting from the frictional engagement of these parts, and this simultaneous movement of the carriage 39 and the plate 42 will continue until the nozzle 66 is tightly engaged with the gate-member '-60- whereby the further movement of plate -42 isprevented. v

Carriage 39 will continue to move independently of the plate 42- until the drivering 36 reaches the straight circumferential portion 34 of the cam 32, at which time the valve 77 and permits air rearwardly to first separate the gate-mom die-sections will be in tight relation, and adapted to receive molten metal for producing castings. Proper adjustment for effecting this tight relation at the position of the drive-ring as-speeified' is provided for by bolts .130 and 131 in the respective slots 107 and 108. At this point cam 74 opens under pressure to pass through pipe 71 from-tank 86 to the pot 63 whereby molten metal is forcedby the 'desired pressure, as for instance 400 pounds, into the dies. Cam 74, being of short circun'lferential length, maintains valve 77 open for a brief period of time, after wluch it is automatically closed by the spring illustrated. At this time cam 75 opens valve 78 and permits the air under pressure to flow from the pot through pipe 71 to the pipe 8S,and from thence to the low pressure tank 89, in which under these .-|rcumstances a pressure may be produced of approximately 300 pounds.

Valve 78 is closed after a brief period by the spring illustrated, and then val ve 79 is opened by cam 76 to bring the pot 63 through pipe 71 into communication with the pipe 93 and the atmosphere to relieve the pressure in the pot, and this condition of atmospheric pressure is maintained during the greater portion of each rotation of the shaft -10 and until at the proper position of the dies, cam 74 again opens valve In the meantime when the cam 75 has permitted the closure of valve 78, and after 1 the valve 79 is opened to produce'atmospherie pressure in thepot 63, the cam 32 begins to move slide 42 and carriage 39 her from the nozzle 66. The frictional ongagcn'ient of slide member 42- and carriage 39 which is maintained by wedge 43 causes a simultaneous rearward movement of these parts to the position of the slide member shown in Figure 2 when the rear end of said member 42 strikes the forward portion of the cross-plate 119, thereby limiting the movement of the slideanember 42, at which point independent movement of the can riage39 begins, whereby the .dies56 and 57 are separated, and the'casting may remain in the die 56 until such time as the rear end of the rack 110 strikes the stop-bar 120, at which time the rack is maintained stationary, while thecarriage continues to move,

V wherelrv the plates 111 and 112 areinoved to thereby e ect forwardly carrying pins 113 the casting. Pins ll-Lare provided ior the purpose of returning plates 111 and'112, and

ejecting pins 113 from the rack 110 to the position shown in'F-igure 2, should that not be automatically effected during forward movement of the carriage 39} Thisis effectdby contact with the forward ends of pins 114 Withthe die 57 when the dies are being under pressure is exhausted from time to time in accordance with the speed of the motor, and the interposed reduction gearing.

'A considerable saving in air under pressure, and therefore, operating power, is effected by reason of the fact that the air from the, pot into' the tank 89 where a pressure of'perhaps 300 pounds is maintained so that pump 87 is only required to raise the prose sure of the air supplied to it from tanks 89 about 100 ing pressure. v

Altho I have shown and described a specific construction of machine as illustrative of a perhaps preferred embodiment of my invention, I'do not desire to restrict myself to the details of the structure or the form and relation of the parts thereof, except as the same may be specifically set forth in the claims hereto appended.

I claim: a

1. A die-casting machine comprising a frame. a shaft .journaled oirtlie frame, a

pounds to obtain desired operatslidable member mounted on the frame and ada ted to carr a die-secti'on a slidin carriage adapted to carry the other die-section.

and frictionally engaged with the sliding member, and cooperative means on the mam shaft and the sliding carriage for effecting ing carriage, a. member mounted on the shaft and having a cam-groove adapted to receive a portion of the drive-pin for effecting, simultaneous reciprocating sliding movement of the .carriage and slide member within the limits of movement of the latter, and then movement of the carriage independent of the slide member.

3. A die-casting machine comprising a frame, a shaft journaled in the frame, a pot having a nozzle, a sliding member mounted on the frame and adapted to carry a diesection for moving the latter into and out of position to receive metal from the nozzle, :1, sliding, carriage mounted on the slide memher and frictionallyengaged with the slide membe'r and adapted. to carry the other diesection, and cooperative means on the shaft and the'sliding carriage for effecting simultaneous sliding movement of the slide-member andthe' sliding carriage to move the first-named die-section "intoand out of position to receive metal from the nozzle, and for effecting an independent positive movement of the sliding carriage to relatively move the dies into and out of closed position.

4. A die-casting machine comprising a frame, a shaft journaled in the frame, a pot having a nozzle, a sliding member mounted on 'theframe and adapted to carry a diesection for moving the latter into and out of position to receive metal from the nozzle, a sliding carriage mounted on the slidemember and frictionally engaged with the slide-member and adapted to carry-the other sliding carriage,

pendently of ing a portion die-section, a cylinder mounted on the shaft,

and having a cam-groove and a drive pin frictional contact therewith for moving the slide member within the limit of movement of the latter, and a drive-pin engaged with 1 the sliding carriage, and having a portion adapted to contact with said cam for effecting reciprocating movement of the sliding carriage.-

6., A die-casting machine comprising a main frame, a slide member mounted onthe 'main frame and having an elongated slot mounted on the shaft and formed with a cam so therein, a shaft journaled in the main frame below the slide member, a camtmounted on the shaft for rotation therewith, a sliding carriage mounted on he slide-member and frictionally engaged therewith for simultaneous sliding movement, a drive pin engaged with the sliding carriage and extending through said slot and having a portion adapted to engage said cam for'eil'ecting simultaneous sliding movement of the slide member and sliding carriage within the lllll', its of movement of the former, and then inde endent movement of the sliding carriage.

i. A die-casting machine comprising a a slide member mounted on the main frame,

for horizontal reciprocating main frame ,movement and formed with an elongate slot, said slide member adapted to carry a die-section, a shaft mounted on the main frame below the slide member, a cylinder for rotation therewith groove, a sliding carriage mounted on the slide member and frictionally engaged therewith for simultaneous movement, said sliding carriage adapted to carry the other die-section, a drive pin engaged with the shding carriage and extending through the slot in the slide tion, co-operative means on the comparatively munication,

member,

and having a portion seated in the cam-groove in the said cylinder for effecting a simultaneous sliding movement of the slide-member and sliding carriage within the limit of movement of the former, and then independent movement of the sliding carriage.

8. A- diecasting machine comprising -a.

'main' frame, a slide member mounted. on the main frame adapted to carry a d1e section, a sliding carriage mounted on the slide member and adapted to carry the other die section, co-operative means on'the shaft and sliding carriage for effecting movement of the sliding carriage, a pot .for containingmolten metal, a compressed air tank, means of communication between the compressed air tank and the pot, a valve in such communication, and means rotating with the main shaft for opening said valve at predetermined intervals to bring the compressed air tank into communication with the pot and a second air tank in communication. withthe pot for exhausting air from the same for later return to the pot underincreased pressure.

9. A die-casting machine comprising a -main frame, a slide member mounted on the main frame adapted to carry a die section, a sliding carriage mounted on the slide member and adapted to carry the other die-secshaft and sliding carriage for effecting movement of the sliding carriage, a pot for containing molten metal, a compressed air tank, means of communication between air tank and the pot, a valve in such communication, means rotating with the main shaft for opening said valve at pre-determined intervals to bring the compressed air tank into communication with the pot, a low presure air tank, means of communication between the pot and the low pressure air-tank, a. valve in such comand means rotating, with the shaft for opening said valve to. bring the pot into communication with the lowpressure air-tank immediately after communication is cut off between the high pressure air tank and the pot.

the compressed 10. A die-casting machine comprising a main frame, aslide member mounted on the main frame adapted to carry a die-section, a sliding carriage mounted on the slide member and adapted to carry the other diesection, cooperative'means on the shaft and sliding carriage for effecting. movement of the sliding carriage, a pot for containing molten metal, a compressed air tank, means of communication between the compressed airtank and the pot, a valve in such communication, for opening said valve at pre-determined: intervals to bring the compressed air tank into communication with the pot, a. comparameans rotating with the main shaft I communication with the low pressure airin limits,

'pot into communication tank immediately after communication iscut off between the high pressure air tank and the-pot, means of communication between the pot and the atmosphere, a valve controllin such communication and means rotating. Wllfil the shaft for, opening said valve to bring the pot intocommunication with the atmosphere after communication has been cut off betweenlthe pot andthe low pressure air tank.

11. A die-casting machine comprising a main frame, a slide member mounted thereon and carrying a die-section, a'pot having a nozzle, a sliding carriage mounted on the slide member and frictionally engaged time with for sin'iultaneous movement within limits, a shaft journaled in the frame below the slide member, a cam member mounted on the shaft, a drive pin engaged with the sliding carriage and with the cam memberfor effecting movement of the slide member and the sliding carriage to bring the die-sections into position to receive metal from the nozzle, a compressed air-tank, means of commu nication between the tank and the pot, a valve controlling such communication, and means driven by the said shaft for opening said valve to bring the compressed airtank into communication with the pot at the time the die-sections are in metal from the pot.

12. A die-casting machine comprising a main frame, a slide member mounted thereposition to receive on and carrying a die-section, a pot having a nozzle, slide therewith for simultaneous movement witha shaft journaled in the frame below the slide member, a cam member mounted on the shaft, with the sliding carriage and with the cam member'for effecting movement of the slide member and the sliding carriage to bring the die-sections into position to receive metal from the nozzle, a compressed air-tank,

a sliding carriage mounted on the means of communication between the tank and the pot, a valve controlling such com-' munication, means driven by the said shaft for opening said valve to bring the compressed air tank into communication with the pot at the'time" the die-sections are in position to receive metal from. the pot, a second'air tank, means of communication between the pot and the second air tank, a valve in such communication, and means driven by the shaft for opening said valve to bring the with the second tank after communication between the first-named tank and the pet has been cut of.

member and frictionally engaged a. drive-pin engaged effecting movement of the slide member and the sliding carriage to bring the die-sections into position to receive metal from the noza slide member mounted therezle, a compressed air-tank, means of communication between-the tank and the pot, a

valve controlling such communication, means driven by the said shaft for opening said valve to bring the compressed air tank into connnuni *ation with the pot atthe time the die-sections are in position to receive metal from the pot, a second air-tank, means 'of communication between the pot and the second air-tank, a valve in andv means driven by the shaft for opening said valve to bring the pot into communication with the second tank after communication between the first-named tank and pot has been cut off, means of [communication between the pot and the atmosphere, a valve in such communication, and means driven by the shaft for opening said valve to bring the pot into communication with the atmosphere after communication between the pot and the second-named tank has been cut off.

14;. A die-casting machine comprising a frame, a shaft journaled on the frame, a slidable member mounted on the frame and adapted to carry a riage adapted to carry the other die-section and frictionally engaged with the slidin member, a drive pin engaged with the sliding carriage, a member mounted on the shaft and having a cam-groove adapted to receive a portion of the drive-pin for effecting si-' multaneous reciprocating sliding movement die-section, a sliding carsuch communication,

of the carriage and slide member within the sliding carriagecapable of simultaneous movement and of movement independently of each other, a die-section carried bythe slide member, the sliding carriage mechanism for automatically moving said slide member and saidsliding carriage to carrythe die-sections into and out of cooperative relation with each other and with the said nozzle.

16. In a die casting machine, a frame, a

and means carried by the v a second die-section carried by member and said sliding carriage to carry the die-sections into and out of cooperative relation with each other and with the said nozzle.

17 In a die casting machine a frame, a pot having a nozzle, a slide mem er mounted on the frame for movement toward and from the nozzle, a sliding carriage mounted'on the slide member and capable of movementsi: multaneously with and independently of'th'e slide member, adie section carried by the slide member, a second die section carried by the sliding carriage and mechanism for automatically moving said slide member and said sliding carriage simultaneously to bring the die section onthe slide member into operative relation for receiving metal from said nozzle, said mechanism acting thereafterto further'slide 'the sliding carriage with respect to the slide member to bring the die-sections into cooperative closed relation.

18. In a die-casting machine, a nozzle for supplying metal, a sliding carria e,- adie section carried thereby, a slide mem er, a cooperating die-section carried thereby, sliding carriage and said slide member having a frictional engagement of sufiicient tightness so that normally within limits,the

movement of one will simultaneously move the other, means for moving thesliding carriage to initially separate the dies from the nozzle, means for limiting the movement of the slide member simultaneously with the carriage, said moving means acting thereafter to cause continued sliding carriage to separate the dies.v

In witness whereof I have hereunto set my hand this 8th day of- April, 1925.

' WILLIAM J. DURING.

said

movement of the I

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