US2393588A - Die casting apparatus - Google Patents

Description

Jan. 29. 1946.

G. L. CHERRY ETAL DIE CASTING APPARATUS Filed Aug. l0, 1943 4 Sheets-Sheet 1 /NvENro/es LCf/E/e/ev C? C. VEALE HTTOE/VEY Jan. G, L, CHERRY ET AL l DIE CASTING APPARATUS Filed Aug. 10, 1943 4 Sheets-Sheet 2 H64 l I y ly /fef n (26 /30 (/50 /55 /32 77 154 53 '/NvENTo/es G. L. CHERRY C. C. VEALE Afton/EY Jan. 29; 1946,

G. L. CHERRY ET AL DIE CASTING APPARATUS Filed A ug. 10," 1943 4 Sheets-Sheet 5 /Nvs/ro'es G. l. MERRY C. C: VEA/.E

TTOENEY Jan. 295 1946. G. L. CHERRY ETAL 2,393,583

DIE CASTING APPARATUS Filed Aug. 10, 1943 4 Sheets-Sheet 4 HG. 7 F/G /59 /N VE N TOES G L .Cf/Rev h C. C. VEALE [46 f BY//HrrR/-VEY masseuses. zo, 194s einen asentar DIE @ASG ARATWS George L. merry, WcsternSprlngs.' and Charles l C. Veille, eaten, lili, more to n Electric illcunp., incorpora, New Yorin,

N. Y., a corporation or Ncw'lforh V Application i t! 11 ma.,

This invention relates to die casting apparatus and more particularly to a die casting apparatus having an adjustable injecting plunger and melting pot to permit the injection of the die casting material at selected points of the die cavities.

lt is an object of the present invention to prol vide a simple readily adjustable die casting apparatus.

ln accordance with one embodiment oi the inventlon, a die casting'machine including separable dies is provided with e. melting pot, having a built-in gooseneck, wherein the pot may be adiusted transversely of the direction oi' movement of the dies to permit ofi-center gating or the die cavities. In this apparatus, the injection plunger is mounted on a cross head so that it may he slid into position toy cooperate with an injection cylinder seated in the gooseneck, and a. bali and socket connection between the actuating piston for the plunger and the plunger itself permits a limited amount of self-adjustment oi the plunger.

A complete understanding oi the invention may he had by reference to the following detailed description considered in conjunction with .the ace companying drawings, wherein:

Fig. l is a front elevational view, partly in section, ci a die casting machine embodying vthe novel features of the invention and showing cooperating dies in place to receive the-die casting material at the center of the dies;

Fig. 2 is a' fragmentary vertical sectional iflew showing a pair of dies adapted to be gated ou center;

Fig. 3 is an irregular plan section taken substantiaily along the line 3 3 of Fig. 1 in the direction of the arrows;

Fig. i is another plan section taken substantially along the line l-il ci Fig. 1 in the direction oi the arrows showing some details ol the melt-1 ine pot;

Fig. 5 is a transverse vertical sectional view taken substantially along the line 5-5 of Fig. l in the direction of the arrows showing the arrangement of the supports for the melting pot and some details of its built-in gooseneck;

Fig. 6 is a fragmentary verticalsectional view taken substantially along the line -6-6 of Fig. l

in the directionof the arrows showing some details of the mechanism whereby the melting pot may be adjusted to properly position it beneath whichever type of die isbeing used;

'45 serted or removed.

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lili) the apparatus is designed to be mounted upon a base it. The die supporting and actuating nicch-y anismsare not shown in detail herein since they vform no partei the invention, it being soient to state that the various portions of the dies and their actuating mechanism are supported in position to permit reciprocation ot e piston rod il having suitably lined thereto a cross head it.

The cross head it is slidahle between a pair of upright members itA and itl and carries a plate it on its lower surface, to which a die holder it may be suitably attached. There may loe ilired to init, through which a nozzle 2t may-entend. The .nozzle tt has an annular shoulder it termed on it. which is of a diameter such that its outer periphery engages the upper edges of the aperture ttf which has a shoulder il formed on it. A spacer plate it may he set into the aperture tl, resting on the shoulder tl, and will serve to properly position the nozzle it in alignment with an entrance aperture il@ oi the lower die it or with an entrance aperture tiloi lower die tt,

` it being understood that plates t@ oi different the entrance aperture or sate in the lower'die` member. The nozzle it is provided with a heating element ti,- connected by suitable conduit t2 tov a source of current, wherebythe nozzle may be Fig. 7 is a verticalsectional view taken substantially along the line l--l of Fig. l in the direction of the arrows showing the injecting or Referring to the drawings, it will be seen that maintained at such a temperature as toprevent freezing of the die casting metal in the noz- At the left end of the irregularly shaped aperture it, the shoulder 2l is cut away to provide a partially circular entrance hole 33 (Fig. 3), through which the nozzle 2t may be readily inwhich serves to interconnect the lower end of the nozzle with a gmeneck designated generally by the numeral t2. As may be seen most clearly by reference to Figs. 1, 4 and 5, the gooseneck t2 is Vformed integrally with a melting pot t3, which a passage 52 which becomes smaller from right to lett and terminates' in an upwardly extending l passage 58. The upwardly extending passage 58 is in communication with the spacer element 4I andv is defined by a tubular portion 54, from which flanges 55, 58 and -51 extend to the side portion 48, left end portion 45 and side portion 41, respectively, of the melting pot 48. The passage 52, at its right end,'termina's in a seat 58 adapted to receive the lower nesting end of a cylinder 58, in which a shot plunger 88 may be reciprocated. The cylinder 58 is provided with four entrance apertures 8|, 82, 83 and 84, through which molten die casting metal may ow to the interior of the cylinder. In order to prevent undue agitation of the molten metal in the melting pot and to keep dross from entering the cylinder 58, the cylinder has a skirt 85 mounted on it which extends down to a point close to the upper surface of the gooseneck and well beyond the lower edges of the entrance apertures 8|, 82, 83 and 84.

The melting pot 48 is mounted in a pair of yokes and 18 (Figs. 4, 54 and 7), which serve to support it within a casing 11, which has a cover plate 18 suitably supported thereon and extending substantially half-way from the left end ofthe casing to the right end thereof, a suitable aperture 18 being formed in the-cover plate 18 to receive the spacer element 4I. The right end of the melting pot has a cover plate 88 mounted thereon, into which a pouring funnel 8| may be inserted through an aperture 82 formed in the plate 88. In addition to the aperture 82 for receiving the funnel 8|, the cover plate V88 has an aperture 83 formed therein through which an actuator rod 84 and the shot plunger 88 may extend. The actuator rod 84, as seen most clearly in Figs. '1 and 8, is surrounded byv a sleeve 85, which-is threaded into the shot plunger 88 and carries its lower edge 88 in the path of an annular shoulder or ball 81 formed on the actuator ment of the sleeve 85 with the shot plunger 88, l the shot plunger will be moved upwardly with the actuator rod 84.- However, a limited amount oi' -play is thus provided whereby, if the actuator rod is not in exact alignment with the shot plunger 88, there will be no tendency for the plunger to bind inthe cylinder 59.

-At its upper end, the actuator rod 84 is interconnected with a piston rod 88 by means -oi' a ball andy socket joint 88 and the piston rod 88 is, in turn, interconnected with an actuator head 98 adapted to be driven by any suitable mechanical or hydraulic driving means,which will impart reciproc'ation to it. The means for interconnecting the piston rod 88 with the actuator head 88 comprises a dove-tail 9| slidable in ways 92. manner, the piston rod 88 may be shifted from left to right (Fig. 1) to the desired position, depending upon the position of the nozzle 25, so that the shot plunger 88 will be in alignment with the cylinder 59 as closely as possible, the ball and socket joint 88 and the construction of the lower end of the actuator rod 84 compensating for any slight misalignment oi these parts. The mechanism for adjusting the position of the piston rod 88 may comprise any suitable adjusting mechanism, for example, an adjusting screw 93.

Fixed to the upper surfaces of the yoke 18 by means -oi machine screws |88 and |8| (Fig. 7),

In this' is a cross yoke |82 having a central aperture |88 through which the sleeve 88 extends. A cover plate |84, which also encircles the sleeve 85, closes substantially all of the aperture |88 and prevents any possible splashing of metal out through.

the top of the yoke. The cross yoke |82 has a pair of set screws |85 and |88 threaded in it adapted to engage depressions |81 and |88, respectively, formed in an upstanding collar |88 of the cylinder 58, whereby the cylinder will be forced into the seat 58 to seal the cylinder into the seat. The yoke 15 has a pair of projecting shoulders |88 and ||8 and the yoke 18 has a pair of similar projecting shoulders and ||2, which extend through the casing 11 to lock the yoke and casing together. .Any suitable heating means (not shown) may be provided within the casing 11 for heating the melting pot 48. A preferred form of heating Ameans may comprise electrical heating units (not shown) imbedded in the walls of the melting pot 48 and connected to a suitable source of power.

The entire melting pot 48 and the casing 11 are supported by a pair of channel members H3 and H4, which are joined together at their left end (Fig. l) .by a cross channel member ||5. The casing 11 is not ilxed to channel members H3 and H4, but is slidable with respect thereto, being provided at its left end (Fig. 1) with a threaded member H8, which is attached to the casing and which is adapted to receive the threaded portion of an adjusting screw ||1. The screw ||1 is provided with a pair of shoulders ||8 and H9, either one of which may cooperate with a removable abutment member |28. As shown most clearly in Figs. 1`and 5, the abutment member |28 has a slot |2l formed in it to receive a reduced portion of the adjusting screw ||1 between the shoulders |I8 and H8. This abutment member is adapted to be positioned between walls |22 and |23 of a double-walled bracket |24, which is, in turn, attached to a support block |25. The support block |25 extends into the channel of the channel member ||5 and is suitably attached thereto whereby when the adjustment screw I|1 is rotated, the shoulder ||8 or shoulder H8 thereon will engage with the abutment member |28 if itis in the position shown in Figs. 1 and 6, and, accordingly, the entire assembly including the melting pot 48 and casing 11 may be moved to the right or leit along the channels ||8 and ||4, thus to properly position the nozzle 25 with respect to the lower die being used in the apparatus. The amount of travel of the melting pot assembly to accommodate the gates or entrance apertures of the dies is not very great, but the adjustment member 1 is adapted, when rotated, to impart sufiicient movement to the melting pot assembly to facilitate its removal or insertion in the apparatus, the removable abutment member |28 being provided so that the adjustment screw. H1'- may be removed after an appreciable amount of movement has been imparted to the melting pot assembly so that the ends ofI the threads of the adjustment screw ||1 will not be stripped when the melting pot is being removed. l

The support block |25, in addition to supporting the double-walled bracket |44, has a socket |26 formed in it to receive the -upwardly extending end of a vertical adjustment screw |21, which is threaded into a base block |28 mounted on the base I8, which is, in turn, provided with a clearance hole 28 to receive the vertical adjustment screw |21. In placing the melting pot in tively, in a cross bar |45.

adjusted in a horizontal plane by means of the adjustment screw ||1 to bring the spacer element 4| into alignment with the nozzle 25 and, thereafter, the left end of the melting pot assembly may be elevated by manipulating the adjustment screw |21.

'Ihe lefthand upright member |3 extends down to the base l0, being cut out as shown at |30 to permit access to the adjustment screws ||1 and |21. However, the righthand upright member |4 is supported on a pair of side walls |3| and |32, whichconstitute a housing for the melting pot assembly 43 and casing 11, which are provided with inwardly extending lugs |33 and |34, respectively (Fig. 7). shouldered apertures |35 and |36 are formed in the lugs |33 and |34 to receive the heads and shanks of support bolts |31 and |38, respectively. The bolts |31 and |38 extend downwardly beneath the channel ,members ||3 and ||4 and are threaded intothreaded members |39 and |40, respectively, which are provided with rounded upper ends |4| and `|42 adapted to nest in pockets |43 and |44, respec- The cross bar |45 extends beneath the two angle members l|3 and H4 and it is believedcto be apparent that by manipulation of the bolts |31 and |38, the position of the right end of the melting pot assembly may be suitably adjusted. The base I is cut out as shown at 146 (Figs. 1 and 7) to receive the cross bar |45 ard the walls |.3| and |32 are cut out as shown at |41 and |48 to permit adjustment of the right end of the melting pot assembly by moving the cross bar |45. In order to prevent the casing 11 from contacting the walls |3| and |32, spacer members |49, |50, |5| and |52 are attached to the side walls |3| and |32 to guide the casing 11 in its movement with respect to the walls |3,| and "|32. Afterthe melting pot assembly, including the casing 11, has been properly adjusted, set screws |53 and |54 may be engaged with the casing 11 and locked in place by lock nuts |55 and |56 to hold the melting pot 43 and casing 11 rigid with respect to the rest of the apparatus.

What is claimed is:

1. In a die casting` machine, a melting pot having a gooseneck formed therein, an adjustable casting for supporting said melting pot in a selected position, an injection cylinder for cooperating with said gooseneck, an ejector plunger to cooperate with said cylinder, a movable actuator head for actuating said plunger, a piston rod mounted on said head and adjustable transversely of the pathA of movement of the head, and a selfhaving an integrally formed gooseneck, a shot cylinder nesting in an end of the gooseneck, a shot plunger' cooperating with said cylinder, means for adjusting the plunger to align it with the cylinder, and means for aligning the gooseneck with the nozzle, including a framework positioned beneath the melting pot for supporting it, means for sliding the melting pot longitudinally of the framework, and means for raisin and lowering the framework a 4. In a die casting apparatus, separable dies, one of which has a vertically disposed entrance aperture, a nozzle postionable to direct molten metal vertically into said aperture, a melting pot having an integrally formed gooseneck, a shot cylinder nesting in an end of the gooseneck, a shot plunger cooperating with said cylinder, means for adjusting the plunger to align it with the cylinder, and means for aligning the goose- Vneck with the nozzle, including a framework positioned beneath the melting pot for supporting it, means for sliding the melting pot longitudinallyof the framework, and means for raising and lowering the framework, said means for mov ing the melting pot longitudinally of the framework comprising an adjusting screw having abutment engaging shoulders formed thereon and a removable abutment engageable with a portion of the framework,

5..In a die'casting apparatus, separable dies, one .of which has a vertically disposed entrance aperture, a nozzle postionable to direct molten metal vertically into said aperture, a melting pot having an integrally formedl gooseneck, a shot cylinder nesting in an end of the gooseneck, a shot plungerA cooperating with said cylinder,

a means for yadjusting the plunger to-align it with the cylinder, `and means for aligning the gooseneck with the nozzle, including aframework positioned beneath the melting pot for'supporting it, means for sliding the melting pot longitudinally of the framework, and means for raising and lowering the framework, said means for raising and. lowering the melting pot comprising a pair of side walls disposed alongside the melting pot, a crossbar positioned beneath and supporting said framework, and a pair of Support plates aligning means interconnecting the plunger and piston rod. l

2. In a die casting apparatus, an injecting nozzle adjustable to cooperate with different die apertures, a melting pot and associated gooseneck adjustable as a unit to feed molten metal to the nozzle, a shot plunger shiftable to position to cooperate with the gooseneck, va. channel iron framework for slidably supporting the melting pot, means for raising and lowering the framework to move the gooseneck into and out of association with the nozzle, and means for adjusting the relative position of the melting pot with respect to the framework.

3. In 'a die casting apparatus, separable dies, one of which has a vertically disposed entrance aperture, a nozzle postionable to direct molten metal vertically into said aperture; a melting pot mounted in said side walls for raising and lowering the crossbar.

6. In a-die casting apparatus, separable dies, one of which has a vertically disposed entrance aperture, a nozzle postionable to direct molten metal vertically into said aperture, a melting pot having anintegrally formed gooseneck. a shot cylinder nesting in an end of the gooseneck,' a

shot plunger cooperating with said cylinder,-

means for adjusting the plunger4 to align it with the cylinder, and means for aligning the gooseneck with the nozzle, including a framework positioned beneath the melting pot for supporting it, means for sliding the melting pot longitudinally of the framework, and means for raising and lowering the framework, said means for raising and lowering the melting pot comprising a pair of side walls disposed alongside the melting pot, a crossbar positioned beneath' and supporting said framework, and a pair of support plates mounted in said side walls for raising and lower-` ing the crossbar to raise one end of the melting pot, and a bracket mounted on the other end of the framework and supported from a threaded base block by means of an adjusting screw.

GEORGE L. CHERRY.

CHARLES C. VEALE.

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