US1525893A - Metal mold - Google Patents

Description

' Fe. 10, I 925.

J. L. SCHNOBRICH METAL mom) Filed April 7, 199.3

4 Sheets-She t 1' Feb. 10, 1925.

J. L.. SCHNOBRECH 4 Sheets-Sheet 2 Feb. 10, 1925.

J. L. SCHNOBRICH METAL MOLD Filed April '7, 1923 4 Sheets-Sheet 5 Elite-mum;

Patented F eb. 10, 1925.

UNITED STATES PATENT OFFICE.

JOHN L. SCHNOBRICH, OF CINCINNATI, OHIO, ASSIGNOR TO HARRY J. HATER, 0F 7 CINCINNATI, OHIO METAL MOLD,

Application filed April 7, 1923. Serial no. 630,600.

To all whom it may concern:

Be it known that I, JOHN L. SGHNOBRICH, a citizen of the United States of America, residing, at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Metal Molds, of which the following is a specification.

This invention relates to permanent metal molds of the kind used in making castings from metals and metallic alloys such as aluminum and its alloys which have comparatively low fusing points. More particularly, the invention relates to m'olds of this type for producing hollow or cup- I other core members project horizontally into the mold cavity for the purpose of forming the wrist pin openings in the piston.

Owing to the number of parts involved and the relative complexity of the operation of assembling and removing the "arious core members, etc., each time a piston is cast, it has heretofore been the practice to employ two men, a molder and a helper, to operate such casting apparatus,

these two men standing on opposite sides of the mold.

This method of operation has, however, resulted in a relatively high labor cost, and it is the primary object of the present invention to provide molding apparatus of the above character so constructed and arranged that it may be readily and effectively manipulated by a single operator. In

' other words, I seek to solve the problem of a one man mold.

Other objects of the invention are to .provide improved means for ejecting the finished casting from the mold when the sections thereof are separated, to provide an improved rack for conveniently holding the core members when the same are removed from the mold, and to provide an improved latch mechanism for locking the mold sections together.

With the above and other objects in view, as willlater more fully appear, the lnventlon consists in the construction and arrangement of parts, hereinafter described and claimed, and illustrated in the accompanying drawings, in which Fig. 1 is a side elevation of my improved molding machine;

F 2 a plan view thereof;

F 1g. 3 1s a vertical longitudinal section,

substantially on the line 33 of Fig. 2; F t is an end elevation thereof; Fig. 5 is a transverse section thereof substantially on the line 5-5 of Fig. 2;

Fig. 6 is a detail showing the improved latch operating mechanism; and F1g. 7 is a fragmentary section substantlally 0n the line 77 of Fig. 3 looking in the direction of the arrow.

Referring to the drawings in detail, 1-

designates a suitable base plate supported at a convenient height by means of legs (not shown). On the base 1 are slidably mounted a pair of separable mold sections 2 and 3, as usual. The meeting faces of these sections are so shaped as to form within the same a mold cavity 4, which, in the case of a piston mold, is of course circular in plan. The bottom of this mold cavity is formed by the base itself, as clearly shown in Fig. 3.

A gate or inlet, leading to the mold cav;

ity 4, is also formed in the meeting faces of the two mold sections, as indicated at 5 in Fig. 5, and so far as the present in.- vention is concerned, this gate may be of any desired construction.

As is usual in this type of apparatus, there are provided seven co operating core members, fitting within the upper part of the mold cavity. in Fig. 2 and comprise a central member These are clearly shown 7 flanked by a pair of associated members 6 and 8, and four members 10, 11, 12 and 13 fitting in pairs at each side of the central group. The construction and method of manipulation of these seven core .members is too well known in the art to require detailed description here.

The three middle members 6, 7 and 8 are provided with upstanding rods or handles 9 by which they may be manipulated, and an arm, having a handle at its end, is also rigidly secured to each of the four core members 10, 11, 12 and 13, such arms extending in a substantially horizontal direction. In prior arrangements, it has been customary to have these four arms so arranged that they radiate from a common center, like the spokes of a wheel, two of them being within, reach of the molder and the other two within.reaeh of the helper, these two men standing, as above described, on o-posite sides of themold. Tn my improved construction, however, I arrange these arms or handles so that all four of them project or extend in substantially the same direction, the handles being all located on the same side of mold so that they can all be grasped by a single operator without leaving his position.

Referring to Fig. 2,- 14 and designate my improved arms, which are rigidly attached to the core members 10 and 11 respectively, and are. provided at their free ends with handles 16 and 17. It will be seen that these arms 14 and 15 are formed with reverse bends 14 and 15, so that the handles 16 and 17 are disposed on the opposite side of the mold from the core members 10 and 11 to which they are attached. To the core members 12 and 13 are secured the arms 18 and 19 as usual, having the handles 20 and 21, and by reference to Fig. 2, it will be observed that all of the handles 16 and 17, 20 and 21 lie adjacent each other, at the same side of the mold.

In order to properly position the core members 10 and 11, and 12 and 13, I preferably provide pins 22 and 23 set into the mold sections 2 and 3 respectively, adjacent the meeting edges of the core members, as clearly'shown in Figs. 2 and 3.

Set into opposite sides of the mold sections 2 and 3 are two pairs'of pins or studs 24, these studs preferably having reduced threaded ends 24 which are screwed into suitable openings in the mold sections. The studs forming each pair are parallel and spaced slightly apart, and their outer ends are reduced and threaded, as shown at 25. A plate or bracket 26, having a slot 27 therein fits over the ends 25 of each pair of studs 24 and is secured in position thereon by means of nuts 25. By virtue of the slot 27, the plates 26 may be adjusted slightly if required.

The lower ends of the plates or brackets 26 are forked, as shown at 28 in Fig.7, and these forked ends are so shaped as to snugly fit over racks 29 circular in cross section and provided with teeth on their upper sides. To the inner end of each rack is secured a core member 30, such member forming in effect a continuation of the rack body and being in alinement therewith. These core members 30 slide freely through the side walls of the mold sections 2 and 3, and'the outer ends of the racks 29 are slidably mounted in brackets 32, adjustably secured to the ends of the base plate 1. Each of these brackets is pro vided with a pair of slots 34 through which work bolts 33, as shown in Fig. 4, andthe brackets may be adjusted vertically by means of adjusting screws 35 bearing thereagainst, and working through stationary lugs 36.

Inter-posed between the end of each rack 29 and the adjacent wall of the mold section and surrounding and rigidly secured to the core member 30 is a collar 31. This collar is of such a size that it cannot pass through the forked end of the bracket 26, but willengage with the prongs 28 thereof, for a purpose hereinafter described.

One of the racks 29 is in engagement with a pinion 37, secured to a shaft 38, journaled in extensions 32 of the bracket 32, and extending a considerable distance beyond said bracket as indicated at 38 in Fig. 2, this extended portion being preferably enlarged. At the extreme end, this enlarged portion 33 of the shaft 38 carries an operating lever 39, having an arm 40 pivotally connected at 41 with a link 42. The other end of this link is itself pivotally connected at 43 with a crank arm 44, secured to a shaft 45, journaled in extensions 32 of the other bracket 32 at the other side of the mold, and having rigidly mounted thereon a pinion 46 which engages with the other rack 39.

From the above, it will be obvious that when the lever 39 is swung upwardly from the position shown in Figs. 1 and 3, the two pinions 37 and 46 will be simultaneously rotated and will simultaneously cause the racks 29 to travel in opposite directions. The first part of this movement results in withdrawing the core members 30 from the cavity of the mold. After this initial movement, a further movement in the same direction causes the collars 31 to engage the lower forked ends of the brackets 26, and thus, as the movement ofthe racks continues, these brackets, together with the mold sections 2 and 3 to which they are attached, are simultaneously moved away from each other, or in opposite directions. Thus, the two mold sections are separated.

In the practical operation of molds of this type, difficulty has been experienced, due to the tendency of the finished casting to stick to one or the other of the mold sections as the latter are separated. In order to obviate this, and to positively strip or eject the casting from the mold sections, I provide a pair of knock out rods 47. These are slidably mounted at their outer ends in the brackets 32, and their inner ends slide freely through openings in the walls of the mold sections 2 and 3. Their normal position, when the mold is ready to receive a charge of molten metal, is shown 111' Fig. 3. Cross pins 48 are set into the rods 47 at a point slightly removed from the inner faces of the brackets 32.

' mold section it may tend to adhere to.

In order to lock the mold sections tightly together during the casting operation, I provide a pair of latches or hooks 49, mounted one at each side of the mold. These hooks are adapted to engage pins 50, set into one of the mold sections, and are so formed that the point or the beak 49 of the hook underlies the pin when in locked position, 'as shown in full lines in Fig. 6. In order, therefore,'to disengage the hooks from the pins.

it is necessary to first move them longi-.

tudinally so that the beak 49 will clear the pins when the hooks are swung on their pivots. To accomplish this, I employ the construction shown in the drawings and particularly in Fig. 6. Referring to this figure, it will be seen that each hook 49 is journaled upon an eccentric 51, these eccentrics being rigidly secured to a shaft 52 journaled in the mold section 3. The ends of the shaft 52 are extended beyond the eccentrics and carry transversely disposed radially projecting pins 56. These pins are adapted to engage pins 55 carried by the hooks 49, so as to elevate the hooks into the position shown in dotted lines in Fig. 6, as

' the shaft 52 is rotated. In order to rotate this shaft, I secure to one end thereof a crank arm 53 provided at its end with a handle 54, as clearly shown in Figs. 1 and 2.

The parts being in the position shown in full lines in the drawings, it will be obvious that when the handle 54 is moved upwardly, as viewed in Fig. 1, the initial rotation of the shaft 52 serves, by meansof the eccentrics 51, to move the hooks 49 longitudinally until the beak 49 clears the pin 50, and a further rotation of the shaft 52 causes the pins 56 to engage the pins 55 and thus lift the hooks or latches out of the path of movement of the pins 50. When the latches or hooks are thus lifted, the mold sections 2 and 3 are free to move away from each other, as above described.

In order to tacilitate the work of the single operator of my improved mold and to avoid possible damage to the core members, I provide a special rack or holder to receive these core members when they are removed from the mold cavity. This rack comprises apair of upstanding arms or side members 57, rigidly secured :as at 57 to the base plate 1. To the upper ends of the side members 57 are rigidly secured transverse bars or arms 58 and 59, arranged one above the other and spaced apart, such arms being preferably inclined to the horizontal, as

shown in Fig 1.

Extending between the pairs of arms 58 and 59 are rods 60, arranged to constitute a grating, such rods being preferably formed of copper or other material of a softer nature than the core members, so that such core -members will not be scarred or damaged by coming in contact therewith. In addition to the rods 60, the upper arms 58 preferably have an end plate 61 and bottom plate 62 secured thereto, to form a trough or recepgaele to more securely hold the core mem- In practice, the core members 6, 7 and 8, when removed by the operator, are laid upon the upper rack comprising the arms 58, and

the end wall 61 constitutes a stop against which the ends of these core members abut, so that they remain upon the rack with the handles 9 projecting toward the operator. The other core members 10, 11, 12 and 13 are laid upon the lower rack comprising the arms 59, and no stop isnecessary in connection with this rack, since the depending arms 14, 15, 18 and 19 themselves constitute stops to prevent the core members from slipping olf of the rack. It will be understood, of course, that suitable gas burners or other heating means (not shown) may be provided for maintaining the parts of the mold at a suitable temperature to prevent premature hardening of the metal, but as this is Well known, I have not thought it necessary to illustrate the same in connection with the present invention.

It will be observed that the single operator, standing at one side of the mold, and without changing his position, can readily grasp the operating lever 39 and all of the handles 9, 16, 17, 20 and 21. It will also be noted that he can readily place the core members upon the racks, as described, without changing his position, and that, within easy reach also is the handle 54 of the lock operating mechanism.

It will therefore be seen that all of the steps incident to pouring a metal charge into the mold, opening the mold to remove the finished casting, closing and locking the mold, and assembling the core members in the mold cavity, can all be expeditiously performed by a single operator, without moving from his position, audit is though that the many advantages of my improved apparatus will be readily appreciated without further discussion.

What I claim is "1. The combination with a mold comprising a pair of separable sections, supporting means on which said sections are slidably mounted, racks operatively associated with said sections, pinions meshing with said racks, an operating lever, and means actuated by said lever for simultaneously turning said pinions, and shifting said racks in opposite directions, thereby moving said sections toward or away from each other.

2. The combination with a mold comprising a pair of separable sections, supporting means on which said sections are slidably mounted, racks operatively associated with said sections, pinions meshing with said racks, an operating lever secured to one of said pinio-ns, an arm secured to the other, and a link connecting said lever and arm, whereby, when said lever is actuated, said racks are simultaneously reciprocated, and the mold sections moved in opposite directions.

3. The combination with a supporting base, of a mold having a cavity and comprising two separable sections, one of which is slidably mounted on said base, a core member extending through the wall of said movable section, in a direction parallel with the line of movement thereof, and projecting into the mold cavity, an operating device, and means actuated by a movement of said device for first withdrawing said core member from the cavity, and then shifting said movable section away from the other.

4. The combination with a supporting base, of a mold having a cavity, and comprising two separable sections, one of which is slidably mounted on said base, a core member extending through the wall of said movable section, in a direction parallel with the line of movement thereof, and project-- ing into the mold cavity, an operating device, means actuated by an initial movement of said device for withdrawing said core member from the cavity, and means actuated by a further movement thereof in the same direction for shifting said movable section away from the other.

5. The combination with a supporting base, of a mold having a cavity, and com prising two separable sections, one of which is slidably mounted on said base, a core member extending through the wall of said "movable section, and projecting into the mold cavity, a rack secured to said core member, a pinion engaging said rack, a device for operating said pinion to move said rack so as to withdraw said core member-from the cavity, and means carried by said rack for engaging and moving said movable mold section after the rack has traveled a predetermined distance.

6. The combination with a mold comprising a pair of separable sections, each containing complementary parts of the mold cavity, of a base plate on which said sections are slidably mounted, a pair of alined core members mounted in and extending through the walls of said mold sections and projecting toward each other into the said cavity, an operating device, and means actuated by a movement of said device for first simultaneously withdrawing said core members from the cavity, and then simultaneously moving said mold sections away from each other, the line of movement of said mold sections and core members being parallel.

7. The combination with a supporting base, of a moldhaving a cavity and comprising two separable sections, one of said sections being capable of sliding movement on the base and having an opening extending horizontally through the wall thereof in the direction of movement, a core member permanently carried by said movable section and slidably mounted in said opening with its end projecting into the mold cavity, an operating lever, and means actuated by a movement of said lever for first shifting said core member endwise through said opening sufliciently to withdraw the same from the mold cavity, and then shifting said movable section, with the core member, away from the other section.

8. The combination with a supporting base, of a mold having a cavity and comprising two separable sections, one of said sec tions being capable of sliding movement on the base, a core member extending freely through the wall of said movable section and projecting into the mold cavity, an operating lever connected with the outer end of said core member to withdraw it from the mold cavity, and means carried by said core member for engaging and shifting said movable mold section after the core member has been moved by said lever a predetermined distance.

9. The combination with a mold comprising a. pair of separable sections, each containing complementary parts of the mold cavity, a base plate on which said sections are supported for relative sliding movement, said sections having openings extending through the walls thereof in alinement with each other, and with the direction of movement, a pair of core members permanently carried by said mold sections and slidably mounted in said openings, said core members, when in operative position, projecting toward each other into the mold cavity, an operating lever, and means actuated by said lever for first shifting said core members endwise through said openings a sutficient distance to withdraw them from the mold cavity, and then simultaneously moving said mold sections, carrying said core members, away from each other.

10. The combination with a mold having a cavity open at its upper end, of a pair of removable core members fitting in said cavity at one side thereof, and arms secured to said core members and having handles at their free ends, the said arms being bent so that the handles are disposed at the opposite side of the mold from that on which said core members are located.

11. The combination with a mold having an upwardly opening mold cavity therein, of a plurality of separable core members adapted to fit within said cavity, and an arm secured to each core member and having a handle at its free end, all of said arms extending in the same general direction, so that all of said handles may be grasped by an operator without moving from his position.

12. The combination with a mold having an open top cavity therein, of two pairs of core members fitting in said cavity, an arm secured to each core member and having a handle at its free end, all of said arms extending in a substantially horizontal direction toward the same side of the mold.

13. The combination with a mold comprising a pair of separable sections each containing complementary parts of the mold cavity, such cavity having an open top, of an operating lever for separating said sections, a series of core members fitting within the mold cavity, and an arm secured to each core member and having a handle thereon, all of said arms extending in the same general direction and toward said lever, whereby an operator may grasp either said lever or any of said handles without moving from his position.

14. In a permanent metal mold for easting internal combustion engine pistons from aluminum, aluminum alloy or the like, the combination of a plurality of metal mold parts, some of which are movable, core pins for... use 'in the said mold parts, means located at one side of the mold to move said core pins and said movable mold parts in and out of casting position, a main core composed of a plurality of movable parts and means located at the same side of the mold as the first named means for removing and reinstating said main core parts.

15. In a permanent metal'mold for easting internal combustion engine pistons from aluminum, aluminum alloy or the like, the combination of a plurality of metal mold parts, some of which are movable and including pins for forming the openings in the piston for the piston pins and main core parts for forming the main cavity of the piston, and means for displacing and replacing said movable parts from and to casting position, and devices all located at one-side of said mold for displacing and replacing or causing the displacing and replacing of all said parts.

16. The combination with a mold comprising a pair of separable sections, of means for locking said sections together, such means comprising a pair of hooks operated by the continued rotation of said are mounted, one of the sections being slidable on the said supporting means, and

prising a pair of separable sections, of

means for locking said sections together, said means comprising a pair of swinging hooks carried by one section and a pair of pins carried by the other section, with which pins said hooks engage, a s'haft journaled in the first mentioned section, a pair of eccentrics rigidly secured to 'said shaft, said hooks being journaled on said eccentrics, means for rotating said. shaft so as to cause said eccentrics to move said hooks Iongitudinally so as'to clear said pins, and means shaft for swinging said hooks out of engagement with said pins.

18. In a permanent metal mold for easting pistons for internal combustion engines, the combination of a plurality of parts, some of which are movable .and including core pins and a main core composed of a plurality of parts, apparatus for latching certain of said mold parts together during casting and for unlatching said parts, means for displacing and replacing the mold parts and devices accessible from one side of the mold for controlling the displacing and replacing and the latching and unlatching of said mold parts.

19. The combination with a mold comprising a. pair of separable sections having a casting cavity formed therebetween, of supporting means on which said sections means for sliding the said section on the supporting means, toward or away from the other section, including a positively actuated, movable core projecting through the movable section and into the castingcavity, the said core having a lost motion connection with the said section.

20. The mbifitionwith a mold comprising a pair of separable sections having a casting cavity formed therebetween, of" supporting means on which the said .sections areslidably mounted, andmeans for sliding the said sections on the supporting means toward or away from each other ineluding positively actuated, movable cores projecting through the sections and into the casting cavity, each core having a lost mo- *tion connection with its section.

sections a direction parallel with the. line 3 i S ga of movement of the. :said movable section,

and projecting into the casting cavity unitary means for actuating the cores into and out of the said cavity and means associated with one of the cores for shifting said movablesection away from the other section after the said core has been with drawn from the said cavity. 7 i

22. The combination with a supporting base, of a mold having a cavity and comprising two separable sections slidably mounted on the said base, core members ex masses tending through the said movable sections in a directionparallel with the line of movement thereof and projecting into the mold cavity, means for simultaneously actuating the said cores into and out of the cavity, and means associated with the cores for slidin the said'movable sections away from each other after the. said. cores have been withdrawn from the casting cavity.

In testimony whereof I aflix my signature. 7

JOHN L. SOHNOBRIGH.

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