US1736271A - Type-casting mechanism - Google Patents

Description

No 19, 1929. c. A, MACQMIC 4 1,736,271

TYPE CASTING MECHANISM Original Filed May 6. 1925 4 Sheets-Sheet l Nov. 19, 1929.

C. A. MACOMIC TYPE CASTING MECHANISM Original Filed May 6, 1925 4 Sheets-Sheet 2 .f 7 11/01 for Kwierifiacawzb Nov, w, 1929 c. A. MACOMIC 1,736,271

TYPE CASTING MECHANISM Original Filed May 6, 1925 4 Sheets-Sheet 3 iiii C'eiZe/vi Jfacame'c g; 0* m flab/Ways Nov. 19, 1929.a

c. A. MACOMIC TYPE CAST ING MECHANISM Original Filed May 6. 1925 4 Sheets-Sheet 4 Mala/1 Patented Nov. 19, 1929 UNITED STATES PATENT OFFICE CHESTER A. MACOMIC, or CHICAGO, ILLINOIS, ASSIGNOR To PATENT PRODUCT COR- ronATIoN or CHICAGO, or CHICAGO, ILLINOIS, A ConronA IoN OF DELAWARE TY'rE-CAsTINe MEC ANISM Original application filed Kay 6, 1925, Serial No. 28,290. Divided and this application filed September 19, v

' 1927. Serial No. 220,611.

My invention relates to improvements in mold structure for type casting machine and the like, and forms a divisional application based upon subject-matter divided out of my co-pending application, Serial No. 28,290, filed May 6, 1925, for type casting machine- The object of my invention is to provide a new and improved form of mold structure which will be peculiarly adaptable to type casting, and wherein the mold may be easily opened to discharge the slug and may be positively closed.- to take a second slug with a minimum of lost motion and complication. Other objects will appear from time to time in the specification.

. My invention is illustrated more or less diagrammatically in the accompanying drawings, wherein- Figure 1 is a plan view of the mold and pot assembly with parts omitted;

Figures 2 and 3 are side elevations in part section, .in part broken away, showing the mold in closed and open position res ectively;

Figure 4 is a detail plan view of t e matrix bed beneath which the mold is supported;

Figure 5 is a skeleton view showing the op erating mechanism with melting pot in section; and

Figure 6 is a section along the line 6-6 of Figure 1 illustrating the matrices in position for casting.

Like parts are indicated by like symbols throughout the specification and drawings. A A is a supporting bed mounted on a rigid frame, not here shown. Extending down the center of this bed is a flat matrix strip. supporting surface A, there being guide rai s A at either side thereof bounding the matrix strip supporting surface.

Slidably mounted upon the surface A are a plurality of matrix strips H shown in section in Figure 6 and omitted from the remaining figures. It will be understood that these matrix strips are provided upon their bottom with intaglio type impressions, and that means are provided, not forming part-of the invention claimed in the present application, for positioning said strips to bring-the desired representations in opposition to the cast ing slot. The matrix strips form the upper.

' position of the lever.

and engage the spring collars J pinned to the bars J J sothat when the springs expand they tend to draw the bars down and exert a squeeze on the springs. J is a squeeze plate located beneath the s ueeze bar J, and J 8 J 8 are springs adapted to e compressed by the downward movement of the bar J to hold the plate J yieldingly against the upper edges of the matrix strips. Stop pins J threaded in the bar J are in loose engagement with the cylindrical lugs J on the upper side of the plate J, serving to limit the downward movement of the plate with respect to the bar under the urge. ofthe springs, and insuring that the plate will be lifted clear of the matrix strips when the bar J is raised. Opposed lugs J on the plate and J on the bar are adapted to provide a positive contact and to limit the compression of the springs.

Pivoted on the squeeze bar J on its underside is a bell crank lever K having a set screw adjustment K adapted to adjust the angular K is a bearin block engaging an angular yoke K overlying the mold and in slidable engagement with the rack H", on one side. K is a similar yoke engaging the rack H on the other side of the matrix bed and it is associated with a bell from one of the bars J A spring K surrounding the pin K abuts at one end on the arm of the bell crank lever, ,at the other end on the threaded sleeve K whereby the tension of the spring K may be adjusted.

' Thus the downward movement of the two bell crank levers engaging the two yokes on the inclined surface shown exerts a lateral squeeze to compress the matrix strips laterally at the same time as they are compressed above, thus squeezing the matrix strips together and squeezing them against the mold.

Extending clear across the surface A and intermediate its ends is'a slot I. Located beneath the supporting bed A is a melting pot I pivoted at I on the mainframe. It contains any suitable heating element, referably electrical, not here shown, where y the metal in the pot may be kept in a molten condition. I is a plunger pump adapted to discharge the molten metal through the spout I against the underside of a mold located at the slot I beneath the matrix strip. The cross section of the slug which is cast in this mold is indicated at I in Figure 2. The mold is formed by two opposed pivoted elements I I". The element I takes the form of a yoke and is pivoted for rotation on the pin 1*. The element I is inclosed between the arms of the yoke I and is eccentrically pivoted at I".

- When in the position shown in Figure 2, the

end of the spout I comes up against the underside of the mold in register with the slug area I and locks the mold upwardly against the underside of the assembled matrix strips.

The pivoted pins I I which carry the mold arts are pivoted in bearing sleeves I on rackets I on the mam frame. An arm I extends downwardlyand outwardly from the mold member I and pivoted thereon by means of a loose slot I and pin I is a link I, pivon the mold element I, so as to constrain.

both mold elements to simultaneous, but not concentric, rotation.

Assuming thatthe mold members I I" are in the casting position, as shown in Figure 2 and that the melting pot I is to be moved to the casting position, the mechanism for efiecting this upward movement is indicated in Figure 5. L is a cam shaft, rotated by any suitable means, and have mounted on it a number of cam elements which form no part of the invention herein described and claimed and will therefore not be described in detail. Mounted on it is the casting cam S. Forked guides S S on either side thereof straddle the cam shaft. A roller S engages the cam and is pivoted between the forked guides. S

is a push rod extending from the guides and socket S through which it is pivoted on the toggle S. S is an adjustable toggle link pivoted on one end to the link S and at the other end on the bracket S". It will be understood that movement of the cam S closes the toggle and rotates the pot I into casting position, the piston I being held against vertical movement with the pot. The link S is pivoted as at S and has associated with it a lever S connected by the universal joint S with the push rods S, there being one at either side of the machine; These push rods are connected by universal joints'S with the squeeze plungers spring held against these push rods, whereby, as the mold is cast up the springs are released and the squeeze plate comes down.

T is the pump cam adapted to engage a roller T 'on the pump lever T which lever is pivoted at I and associated with this lever is a rocker lever T also pivoted at I and connected by means of a connecting link T with the pump plunger I". The other end of this lever T overhangs the lever T and there is a spring T constrained. by an adjustingbolt T whereby the drive from the cam through the lever T with the pump plunger I is taken through the spring T thus preventing breaking of any of the parts if it should happen that the metal in the metal pot was not melted. T is an adjusting screw to limit the flow of the pump. '1 is a bracket associated with the lever T constrained by'a spring T into the inactive position, the spring being adapted to be stretched when the lever is rotated.

It will be evident that while I have shown in 'my drawings an operative device still many changes might be made in the size, shape .and disposition of parts without departing materially from the spirit of my invention, and I wish, therefore, that my showingbe taken in a sense diagrammatic.

The use and operation of my invention are as follows:

The matrix strips are first moved to the castlng position by mechanisms which form no part of the present invention. It will be understood that the upper side of the mold 1s closed by the matrix strips, with the intaglio type impressions aligned to form the against the underside of the matrix strips,

the opposed walls are spaced the desired thickness of the slug. When swung away from engagement with the matrix strips the eccentric pivoting permits them to separate and release the slug which has been cast. A longitudinally movable rack bar is moved back and forth to cause this rotary movement of the mold and to bring the mold into anism. This toggle mechanism clamps the" spout against the mold and seats the mold.

' snugly against the underside of the bank of matrix strips. At the same time the movement of the toggle releases an auxiliary pressure member and permits a spring-held pressure bar to come down an-dengage the upper side of the matrix strips and support them and also by means of a lever mechanism operates a clamp member which forces the matrix strips laterally together. This is necessary because they must be normally loose in their bed to permit the selecting and distributing movement. When the matrix strips, mold and pot are all firmly clamped together, another cam operates the pump plunger to throw a jet of molten metal upwardly into the mold. Some of this metal, enough to form the slug, solidifies in the mold, the balance drops back into the pot. Then the toggle supporting the pot is pulled back and the pot swings down releasing the mold. A spring finger immediately throws the mold down a short distance below the matrix strip and then the matrix strips are permitted to separate or spread by releasing the lateral and vertical pressure and the mold is swung down to expand its sides and permit the slug to be thrown out onto a carrier'tray carried by the mold rack bars. The necessity ofthis spring finger is obvious because it must throw the mold and the slug down to enable the letters on the slug to clear the matrix strips before lateral pressure upon them is released as otherwise when the strips spread, they would be likely to shear off the letters cast in them and projecting from the slug.

The melting pot toggle is driven by a cam adapted to rock one of the links of the toggle around its fixed pivot point. When the pot is in the down position, the inclination of the toggle link is great and a great deal of power'is needed to close the toggle. This power is proivded by a direct engagement with the end of a push rod leading from the cam with a socket pivoted on the toggle. The movement of the cam, however, is not sufiicient to completely close the toggle and a spring is provided between the socket and the push rod, the strength of which is such that when the toggle is in the open position the spring is completely compressed and there is a metal to metal contact between the end of the push rod and the socket. But as the toggle is closed and gradually approaches the point at which the pot seats the mold, the mechanical advantage of the toggle increases and a point is finally reached where the load on the toggle is not sufiicient to compress the spring. Thus at the end of the cam excursion we find that the spring has pushed the socket away from the end of the ush rod and the final closure of the pot an mold is provided by the spring and not by a rigid mechanical connection. This arrangement gives a smooth firm closure of pot, mold and matrix strips but avoids the danger of breaka e or distortion which might result from c ange in dimensions of parts as for instance 1f the system is frozen or filled with unmoltenmetal.

The final seating of the matrix holding elements which hold the matrices down upon the mold'and compress them laterally is by a spring bar as above pointed out which is allowed to go into 0 eration when a resistance member is with rawn, thus the matrix strips are held together and held against the mold, the metal pot is held against the mold and the mold against the matrix strips by spring action and the metal is forced into the mold by spring action. Thus all the operations at the point where temperature or other changes are likely to take place and are likely to result in looseness, distortion,-

change in shape and size and the like are controlled by spring pressures sufficient to take up any inaccuracies and to insure tight fitting and mating of parts and suflicient to absorb any excessive pressure and preventany breaklngof parts.

claim:

1. In a type casting machine, mold side elements pivoted about adjacent but eccentric axes of rotation, said axes being positioned'upon the same side of the mold.

2. In a type casting machine, mold side elements pivoted about adjacent but eccentric axes of rotation, said axes being positioned upon the same side of the mold, and means for simultaneously rotating said side elements about their separate pivots.

3. In a type casting machine, mold side elements pivoted about adjacent but eccentric axes of rotation, said axes being positioned upon the same sideof the mold, and means for simultaneously rotating said side elements about their separate pivots, comprising a lever associated with one of said side elements and means for rotating it and a lever associated with the other of said side elements and a connection between said two levers.

4. In a type casting machine, mold side elements pivoted about adjacent but eccentric axes of rotation, said axes being positioned upon the same side of the mold, and means for simultaneously rotating said side elements about their separate pivots, comprising a lever associated with one of said side elements and means for rotating it, a lever associated with the other of said side elements and a connection between said two levers, including a projection on one of said levers and a slot in the other along which it is adapted to slide.

5. In a type casting machine, a matrix bed having: a casting slot formed therein, abutments at either side of said slot, pivotally mounted side elements adapted, when in the casting position, to engage said abutments, and means for rotating said side elements,

' out of contact with said abutments, said side elements being pivoted about separate but adjacent pivots.

6. In a type "casting machine, a matrix bed having a casting slot formed therein, abutments at either side of said slot, pivotally mounted side elements adapted, when in the casting position, to engage said abutments, and means for rotating said side elements, out of contact with said abutments, said side elements being pivoted about separate but adjacent pivots, said pivots being situated at the same side of the casting slot.

7. In a-type casting machine having an open topped mold and a plurality of matrix bars closing said open top, mold side elements pivoted about separate axes of rotation and means for simultaneously rotating said side elements about their separate pivots, .a casting spout member adapted to engage said side elements and close the bottom of said mold, and means for moving it into mold closing position.

8. In a type casting machine, mold side elements pivoted about adjacent but eccentric axes of rotation, said axes being positioned upon thesame side of the mold, acasting spout member adapted to close the bottom of said mold, and means for moving it into mold closing position.

9. In a type casting machine having an open topped mold, a plurality of eccentrically pivoted side members and a casting spout member adapted to engage said side elements and close the bottom of said mold, and means for moving it into mold closing position when the mold side members are in casting position.

10. In a type casting machine, a mold having opposed pivotally mounted walls, rotatable members upon which said walls are mounted, the pivot points of said rotatable members being adjacent but eccentric, and unitary means for simultaneously rotating said members, said means being adapted to bring the Walls into casting relation when in one position and to cause the walls to separate to release the slug formed during mold side members underlying said matrix bars, said side members being pivoted about separate but adjacent axes of rotation and unitary means for rotating them about such axes, said axes being same side of the mold.

13. In a type casting machine, a mold having opposed pivotally mounted walls, such walls being adapted to rotate about axes eccentric but positioned on the same side of the mold, the walls being in casting rela-- tion when in one position, and means for rotatmg them about their several separate axes,

after the casting operation, to cause the walls positioned upon the.

to separate and to release the slug formed about the casting operation.

14. In a type casting machine, a matrix bed having a casting slot formed therein, abutments at either side of said walls, side elements pivotally mounted to rotate about axes positioned on one side of the slot, said elements being adapted, when in the casting position, to engage said abutments, and means for rotating said side elements out of contact with said abutments.

15. In a type casting machine, a matrix bed having a casting slot formed therein, abutments at either side of said walls, side elements'pivotally mounted to rotate about axes positioned on one side of the slot, said elements being adapted, when in the casting position, to engage said abutments, and

means tor rotating said side elements out of contact with said abutments, including levers of unequal length associated with said side elements, a flexible connection between the shorter of said levers and the longer and means for rotating the longer of said levers.

16. In a type casting machine, a plurality of pivotally mounted mold members, eccentrically pivoted at one side of the mold, and

pivots, a casting spout adapted to close the bottom of said mold, and means for rotating it into mold closing position when the side members are in casting position.

Signed at Chicago, county of Cook, and

State of Illinois, this th day of September,

CHESTER A. some.

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