US1866191A - Die-casting machine - Google Patents

Description

July 5, 1932. w DURlNG 1,866,191

DIE CASTING MACHINE Filed Nov. 14. 1929 2 Sheets$heet 1.

E 42 H 71/11/1101way/11111111111 llWElyroR' MT/YESS 43 y M July 5, 1932.

w. J. DURING DIE CASTING MACHINE Filed Nov. 14, 1929 2 Sheets-Sheet 2 7/ E A M n W W0 A r W m B L. W WFHMHL wwkgfi 4 WITNESS Patented July 5, 1932 UNITED ,STATES WILLIAM J. DURING, OI SYRACUSE, NEW YORK, ASSIGN'OR TO'PREGISION OAS'IINGS.

PATENT OFFICE COIPAHY, INC 01 SYBAOU SE, NEW YORK, A CORPORATION OF NEW YORK DIE-CASTING mcnmn Application fled November '14, 1929. Serial No. 407,158.

This invention relates to certain new and chines. The invention pertains more par.- ticularly to the construction and operation of the pressure pot or ladle used for conveying molten metal from a suitable melting pot to a die or mold.

The main objects of the invention are the production of a pressure pot o1" ladle which is durable in construction, easily and quickly operated, is positive in its action and comblnes economy of fluid used under pressure for discharging the molten metal from the delivery pot into the die or mold with safeness in operation.

In carrying out the foregoing objects, I have constructed a ladle or pressure pot having a pressure chamber therein adapted to receive molten metal and a delivery. nozzle in connection withsaid chamber adapted when submerged to permit the molten metal to gravitate through the nozzle into the pressure chamber for charging, after which the delivery pot may be moved upward vertically to bring the dehvery nozzle into the horizontal plane of the receiving nozzle or gate for the sprue die section and then to move the delivery pot horizontally in a rectilinear manner to bring the delivery nozzle into casting relation with said gate.

A-further advantage in this invention resides in the particular construction whereby the fluid under presure for .forcing the molten metal from the pressure chamber into the "die, is automatically controlled in that it is only possible to admit the fluid into the pressure chamber when the delivery nozzle is in casting relation with the die or mold.

, casting machine em Other objects and advantages relate to the detail of the structure and relation of the parts all as will more fully appear from the summed in. Fig. 1.

Figure 3 is an enlarged detailed vertical Figure 4 is a longitudinal vertical section taken on line 4-4, Fig. 1.

Figure 5 is an enlarged detailed longitudinal section through the pivotal support for the delivery pot guide arm illustratingthe manner in which the pressure chamber is automatically connected and disconnected with the source of fluid supply. 7

Figure 6 is a detailedtransverse vertical section taken in the plane of the line 6-6, Figure 2.

In the construction shown in the drawings the usual frame or fire box 1 is used having a furnace chamber.-2- therein; a cover plate, as 3, is secured to the upper face of the frame -1- and has mounted therein a suitable melting pot 4 which extends downwardly'from the plate 3- into the furnace chamber 2 and is adapted to contain molten metal.

In close relation to the forward end of the frame or fire box 1- is positioned a suitable die supporting plate -5' which contains the usual gate 6 adapted to register with the inlet port of a suitable dieor mold, not shown, carried by the plate 5.

The plate 5 may be supported in any suitable manner and may be movable or secured to the frame of the machine in a fixed position. In this instance, a rearwardly extending boss 7 is provided on the upper portion of the rear vertical side of the plate 5- in a plane above the gate 6 and to this .boss -7- is securely clamped a rearsection taken in the plane of line 3-3, Fig. useful improvements in die casting ma- 1 a wardly extending horizontally disposed guide rod 8.

The guide rod 8- is provided with an enlarged annularhead portion 9 which is positioned in a suitable recess provided in the inner face of a clamping bar -1() which is secured to the boss 7-v by screws 11--. The clamping bar 10 is also rovided with an aperture therethrough in a 'gnment with the recess through which the rod 8- extends rearwardly to form a guide for the delivery pot or laddle 11- as said delivery pot approaches its forward or casting position to maintain the metal delivery nozzle as 12.- secured to the delivery pot in operative alignment with the gate 6. Thls is accompanied by the guide rod --8- registering in a bushing 13- secured in the upper front portion of a bracket 14 secured to the upper end of the delivery pot 11'.

The delivery pot 11- in this instance, is of the goose-neck type and is provided with a vertically disposed major portion 15 having a pressure chamber 16 therein. A spout 17 for the delivery pot extends from 'the lower end of the major portion 15 upwardly and forwardly and is adapted to support the delivery nozzle -12- in the forward end thereof. The delivery nozzle 12 is connected with the lower end of the chamber 16 by a duct 18.-- provided in the spout 17. The bracket -14- is secured by bolts -19 to the upper portion of the delivery pot 11 and extends forwardly from the major portion 15 of the pot and is provided with a horizontally disposed aperture therethrough adapted to receive a shaft 20. The shaft 20 extends outwardly at either side from the bracket -14 to form a pair of trunnions -21 for the delivery pot. Each of the ends of the shaft 20 extend outwardly through and are supported in suitable guide slots 22 provided in a pair of opposed vertical upwardly extending plates 23 respectively which are made integral with or secured to the upper surface of the frame -1 near the forward end thereof.

The guide slots 22- in this instance, are each composed of horizontal portion --22' v disposed in a plane above the horizontal plane of the gate 6- and a vertically disposed portion 22" which extends downwardly from the rear end of the horizontal portion 22- thereby forming the inverted L- shaped slot 22- for guiding the delivery pot from the casting position to the charging position and vice versa.

In this instance, the width of the slot 22 is greater than the diameter of the shaft -20 so that a roller -25 may be rotatably mounted on the outer ends of the shaft 20 and which is adapted to travel in the respective slot 22- to efiect the easy movement of the shaft through said slot.

The shaft --20- may be moved through the slots 22 by means of a pair of rock arms 26 positioned one at the outside of each of the plates 23 and in this instance, in spaced relation thereto and journaled for pivotal movement on respective shafts -27 said shafts being secured to the lower portion of the respective plates 23- near the forward end thereof so that when the shaft .-20-'- is positioned in the forward portion of theguide slots -22- to bring the delivery pot into the casting position, the

suitable guide secured to a convenient portion of the machine, also not shown, the crosshead being connected by a pair of drive rods 28 which may be securedat their forward ends to the cross-head and have their rear ends pivotally secured at 29 to the lower end of a rock arm 30- which is secured at the upper end thereof to reciprocate the rock arm 26 or may be made integral therewith to form a bell crank lever.

The drive rods 28 may, as shown in the drawings, Figs. 1 and 2, be composed of a rod 31 having a plate 32 secured to the rear end thereof which is secured by bolts -33 to the forward end of a bifurcated arm -34 which is pivotally connected at 29 to the arm 30.

The plate -32 may be yieldingly held in spaced relation to the arm 31 by coil' springs as 35 positioned on the bolts 33- between said plate and the arm 34-. The springs 35-- are of a relatively heavy construction so that when the arm 30 is rocked rearwardly to bring the nozzle 12 into casting relation with the gate -6, a sufficient amount of pressure will be exerted upon the nozzle 12 to maintain it in its proper engagement with the gate 6 against any back pressure which may be produced when the molten metal is forced into the die at the same time providing a yielding connection between the operating means, as a cross-head and the arm 30 to compensate for any difference in movement of the operating means and the rock arms 6-.

The upper ends of the rock arms 26 are each provided with an elongated slot -36 through which the outer ends of the shaft 20 extends, the width of the slots 36 being greater than the diameter of the shaft 20 so as to permit a roller 37 to be rotatably mounted on each end of the shaft and adapted to travel in the respective slot 36 of the rock arms -26.

The rollers 25 and -37 are each of substantially the same width as the plates 23- and arms 26 respectively and may be maintained in the proper spaced relation by a spacing collar 38- mounted on the outer ends of the shaft 20 between the arms 37- and respective plate 23- while a collar 39 may be'secured to each of the outer ends of the shaft 20 to maintain the rollers 25 and 37 in their proper operative position in the respective slots -22 and 36.

The delivery pot 11 may be secured against undue rocking movement about the axis of the shaft -20 by means of a guide rod 40- which is secured to the rear por-a tion of the bracket --14 and extends rea-r-' wardly therefrom with the rear end of said guide rod slidably mounted in a pivotal arm -41 which is secured to a rock shaft -42-.

' for receiving the guide rod The guide rod 40 is also provided with a longitudinal passageway 46- therein which extends from the forward. end thereof rearwardly to such a distance thatfwhen the delivery pot 11 is in the casting position, the inner end of said passageway will be in registration with the passageway 44 in the arm 41, the passageway 46 being in communication with the upper end .of the chamber 16 by means of a duct 47-- provided in the rear portion of the bracket 14 so that when the delivery pot is in the casting position, fluid, as air under pressure, may be admitted through the shaft 42 and passageways -44 and 46- and duct 47- to the pressure chamber --16 for discharging the molten metal contained in said chamber through the delivery nozzle 12- into the die or mold secured to the plate -5-.

The passageway 43 in the shaft 41 may be connected with any suitable source for delivering fluid, as air under pressure as a pump, not shown, by a suitable conduit 4=8- which may or may not be provided with a suitable control valve, not shown, for manually controlling the flow of the fluid and is connected to the shaft -42 by a suitable swivel joint as 49 which may have one end member thereof as -50- secured to the shaft 42- and the other end of said member rotatably mountedin a housing -51. The housing 51- in turn, may be secured to one end of the conduit 48 so that the conduit 48 may remain-in astationary position and at the sametime, permit the free rotary movement of the rock shaft -42 to permit the passageways 43 and 44 to remain in registration at all times.

The horizontal length of the arm 41 through which the rod +40- reciprocates, is somewhat greater than the length of the longitudinal movement of said rod so that the inner end of the passage 46-- will always remain within said 'argn and secured to each end of the arm 41 adjacent the rod 40 is a gland nut -55- adapted to compress packing .56- about the shaft --40- toprevent the escapement of the fluid used to discharge the metal from the delivery potand at I the same time permit the free reciprocating movement of the rod 40- in the arm Referring now to Figs. 4 and 5, it is evident that when the delivery pot -11 is moved from the casting position, as illustrated by the full lines, to the charging position with the nozzle submerged in the molten metal contained in the melting pot. 4- as illustrated by dotted lines, that the delivery pot 11 will be rocked about the axis of the shaft-20- during the vertical movement thereof in the guide slots .-22, due to the pivotal movement of the rod 40 about the axis of the shaft -42 as the guide rod is moved endwise through the arm --41- and this swinging movement of said delivery pot will bring the nozzle -12- into the submerged position in the molten metal contained in the melting pot 4, for permitting the chamber 16 to be charged with the metal.

It will also be noted, especially in Fig. 5, that as soon as the delivery pot 11- commences its rearward movement along th horizontal portion 22' of the guide slots 22 that the passageway 46 in the guide rod 40 will be brought out of registration with the passageway 44 in the pivotal arm 41- thereby severing the connection between the chamber 16 and the source of fluid supply and thus prevent any possibility of accidents caused by the careless or' unintentional opening of any fluid control valve which may be used.

As the delivery pot 11 is moved from the charging position with the nozzle 12-' submerged in the metal contained in the melting pot --4 to the casting position by the action of the arms '26 moving the trunnions -21 along the guide slots -22, the nozzle 12- will be brought into operative alignment with the gate 6 as the trunnions approach the horizontal portion -22' of the guide slots 22 by the action of the guide rod -40 and as the delivery pot --11- approaches the casting position as it continues its forward movement along the horizontal portion 22- of the slots --22--, the delivery pot'bracket 14 will be guided by the guide rod -8 entering the bushing 13- to insure the proper positioning of the delivery nozzle 12-- horizontally as said nozzle engages the gate Although I have shown and particularly described the preferred embodiments ofthis invention, I do not wish to be limited to the trunnions and the delivery pot connected therewith laterally of the melting pot, means connected with'the rearportion of the delivery pot to move therewith and mounted for longitudinal movement and to swing about a fixed axis for rocking the delivery pot about the axis of the trunnions during the vertical movement thereof to bring the delivery nozzle from the charging position within the molten metal to a discharging position in a predetermined plane above the melting pot, and means operably connected with the trunnions for moving the delivery pot along the supporting means.

2. In a die casting machine in combination with a melting pot adapted to contain molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber, supporting means for the delivery pot comprising a pair of opposed trunnions projecting from the forward portion thereof, a pair of opposed guideways extending upward vertically from the melting pot and terminating in a horizontal portion adapted to receive the trunnions, actuating means for the delivery pot operably connected with the trunnions for moving said delivery pot along the guideways, a guide rod connected at one end with the rear portion of the delivery pot to movetherewith and having the other end slidably mounted for longitudinal movement in and to swing about the axis of a pivotal arm for rocking the delivery pot about the axis of the trunnions during the vertical movement thereof to bring the delivery nozzle from the charging position within the molten metal to a discharging position in a predetermined plane above the melting pot.

3. In a die casting machine in combination with a melting pot adapted to contain molten metal, of adelivery pot provided with a pres- .sure chamber therein, and a delivery nozzle connected with .said chamber, supporting means for the delivery pot comprising a pair of opposed trunnions projecting from the forward portion thereof, a pair of opposed guideways extending upward vertically from the melting pot and terminating in a horizontal portion adapted to receive the trunnions, actuating means for the delivery pot operably connected with the trunnions for moving said delivery pot alongithe guideways, a guide rod connected at one end with the rear portion of the delivery pot to move therewith and having the other end slidably mounted for longitudinal movement in and to swing about the axis of a pivotal arm for rocking the delivery pot about the axis of the trunnions during the vertical movement thereof to bring the delivery nozzle from the charging position within the molten metal to a discharging position in a predetermined plane above the melting pot, metal ejecting means comprising a fluid passage in said pivotal arm connected with a fluid conduit, a fluid passage in the guide rod in communication with the pressure chamber and adapted when the delivery pot is in the discharging position to register with the fluid passage in the pivotal arm for admitting fluid under pressure to the pressure chamber.

4. In a die casting machine in combination with a melting pot adapted tov contain molten metal, and a gate adapted to register with the inlet port of a die, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber, supporting means for the delivery pot comprising a pair of opposed trunnions projecting from the forward portion thereof, a pair of opposed guideways extending upward vertically from the melting pot and terminating in a horizontal portion adapted to receive the trunnions, actuating means for the delivery pot operably connected with the trunnions for moving said delivery pot .along the guideways, a guide rod connected at one end with the rear portion of the (lelivery pot to move therewith and having the other end slidably mounted for longitudinal movement in and to swing about the axis of a pivotal arm for rocking the delivery pot about the axis of the trunnions during the vertical movement thereof to bring the delivery nozzle from the charging position within the metal into operative alignment with the gate and a fixed guide adapted to engage the delivery pot as it approaches the is discharging position to cause the properregistration of the delivery nozzle with the gate.

5. In a die-casting machine in combination with a melting pot adapted to contain molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber, supporting means for the delivery pot comprising a pair of opposed trunnions projecting from the forward portion thereof, a pair of opposed guides extending vertically and horizontally of the melting pot in a rectilinear manner and adapted to guide the trunnionsv and the delivery pot connected therewith to bring the delivery nozzle from the charging position submerged in the metal, to a discharging position above the melting pot, and means operably connected plane of the forward end of the horizontal portion of said guideways and having a slid-,

of opposed guideways extending upward vertically from the melting pot and terminating in a horizontal portion adapted to receive the trunnions, and actuating means for the delivery pot operably connected with the trunnions for'moving said trunnions along the guideways to bring the delivery nozzle from the charging position submerged in the metal, to a discharging position above the melting pot.

7. In a die-casting machine in combination with a melting pot adapted to contain .molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzleconnected with said chamber, supporting-means for the delivery pot comprising a pair of opposed trunnions proecting from the forward portion thereof, a pair of opposed guideways extending upward vertically from the melting pot and terminating in a horizontal portion adapted to receive the trunnions, and actuatin means for the delivery pot comprising roc arms journaled to rock about a fixed axis and havin a sliding connection with the trunnions or moving said trunnions along the guideways to bring the delivery nozzle from the charging position submerged in the metal to a discharging position above the melting pot.

8. In a die-casting machine in combination with a melting pot adapted to contain molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber,

supporting means'for the delivery pot comprising a pair of opposed trunnions project ing from the forward portion thereo a pair of opposed guideways extending upward vertically from the melting t and terminating in a forwardly exten ing horizontal portion adaptedto receive the trunnions,

and actuating means for the delivery pot comprising rock 1 arms journaled to rock about a fixed axis arranged inthe vertical ing connection with the trunnions for movin said trunnions along theguideways to bring the delivery nozzle from the charging position submerged in the metal to a charging position above the melting pot. I

' 9. In a die-casting machine in combination with a melting pot adapted to containmolten 65 metal, of a delivery pot provided with a pivoted arm for me 'ng said deliver-i to bring the delivery nozzle from the manner, a guide rod connected with the.

delivery pot to move therewith and mounted to swing about a fixed axis for rocking said delivery pot to bring the delivery nozzle from the charging position within the mol t'en metal to a discharging position above the melting pot, said axis and guide rod being provided with co-operating fluid-conveying ,means adapted to supply compressed air to the pressure chamber when thedelivery pot is in the casting position to discharge the metal from said chamber through the deliv- "ery nozzle.

10. In a die-casting machine in combination with a melting pot adapted to contain molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber, sup porting means connected with the delivery pot for guiding said pot vertically and horizontally of said melting pot in a rectilinear manner, a pivoted arm, a guide rod connected at one-end with thedelivery pot to move therewith and having the other end slidably mounted for longitudinal reciprocativemovement in and to swing about the axis of said pivoted arm for rocking said delivery pot to bring thedelivery nozzle from the charging position within the molten metal to a discharging position above the melting t,

and metal-ejectin means comprising a uid passage in said pivoted arm connected with a fluid conduit and afluid passage in the guide rod in communication with the 'ressure chamber and adapted, when the elivery pot is in the discharging position, to

register with the fluid passage in the pivoted arm for admitt' fluid under pressure to the pressure cham r,

molten metal, of a delivery pot provided with a pressure chamber therein and a delivery nozzle connected with said chamber, supporting means connected with the delivery pot for guiding said pot vertically and horizontally of said melting pot in a rectilinear manner, a rock shaft having a fluid passage connected with a fluid conduit, 11

rock-arm secured to said rock shaft to rock therewith, said arm having a fluid passage in' communication with the fluid passage m said rock shaft and, a guide rod connected at one end with the delivery pot to move therewith and having the other end slidably dismountedforlongitudmal reciprocativemovement in and to swin about the axis of said' I discharging position above the melting pot, said guide rod having a fluid passage in communication with the pressure chamber and adapted, when the delivery pot is in the discharging position, to register with the fluid passage in the pivoted arm for admitting fluid under pressure to the pressure chamber.

12. In a die-casting machine in combination with a melting pot adapted to contain 10 molten metal, of a delivery pot provided with a pressure'chamber therein and a delivery nozzle connected with said chamber, supporting means connected with the delivery pot for guiding said pot vertically and hor- 16 izontally of said melting pot in a rectilinear manner, a pivoted arm haying a fluid passage connectedwith a fluid conduit, and a guide rod connected at one end with the delivery pot to move therewith and having the other 20 end slidably mounted for longitudinal reciprocative movement in and to swing about the axis of said pivoted arm for rocking said delivery pot to bring the delivery nozzle from the charging position within the molten 2 metal to a discharging position above the 'melting pot, said guide rod being provided with a fluid passage having the outlet thereof in communication with the pressure chamher and the inlet normally closed and adapted, when the delivery pot is in the dischar ing position, to communicate with the fluld passage in the pivoted arm for admitting lfluid under pressure to the pressure chamer. 7 t V 13. In a die-casting machine in combination with a melting pot adapted to contain molten metal, of a delivery pot provided with a pressure chamber therein and a' delivery nozzle connected with said chamber, sup

40 porting means connected with the deliver pot for guiding said pot vertically and hor1- zontally of said melting potin a rectilinear manner, a guide rod connected with the delivery pot to move therewith and mounted for longitudinal reci rocative movement and to swing about a ed axis and .a fluid conduit adapted to be connected with a 1 source of fluid under pressure, said guide rod being provided with a fluid passage having the outlet thereof in communication with the pressure chamber and the inlet normally closed and adapted, when the delivery pot is in thedischarging position, to register with said fluid conduit for admittin fluid 5 under pressure to the pressure cham er.

In witness whereof I have hereunto set my hand this 29th day of October, 1929.

WILLIAM J. DURING.

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