US1972174A - Multiple stereotype casting machine - Google Patents

Description

Sept. 4, 1934.

I. TQRNBERG MULTIPLE STEREOTYPE CASTING MACHINE Filed June 2. 1932 4 Sheets-Sheet 1 EVE/7797' AWM Sept. 4, 1934. 1 TQR 1,972,174

MULTIPLE STEREOTYPE CASTING MACHINE Filed June 2. 1952 4 Sheets-Sheet 3 .9 7 o J .2 A 15 a d @z 17 9 Q ,3 17 J 1 5 5 \VR I a i H 5' i i IMF- Q 6 7 .53

6 J8 J E J2 46 6 16 I fi gj TORNBERG 1,972,174

MULTIPLE STEREO TYPE CASTING MACHINE: I

4 Sheets-Sheet 4 S ept. 4, 1934.

Filed June 2. 1952 Int/820607 Patented Sept. 4, 1934 T TE TENT OFFICE MULTIPLE STEREOTYPE CASTING g MA CHINE 7 Isidor Tornberg, Plaiiifield, N. J assignor to Wood 1 7 Newspaper. Machinery Corporation, New York,

-N. 'Y., a corporation of Virginia Application 115 ,1932, 'SerialNo. 614,874

type plate casting machines in which a pluralityf of molds are associated with a single pump and means is provided by which the molds .can be general'objectsset forth above, means for -oper-:

., I filled by the pump, one after the other; 1 3

The principal object of the invention is to provide an eificient and simple mechanism for casting a largenumber of stereotype printing plates from a multiplicity of molds witha single,

lo ipump and giving thexmolds time to cool between casting operations without interrupting the con-' tinuity'of the process of casting the plates.

'The invention also involves the application of the above described method of casting'to stereotype moldsin which the matrix has to be stripped and the plate removed'between each two-casting operations in a mold. 7

Other objects and advantages ofthe invention will appear hereinafter. Reference is to beha'd .to the accompanying drawingsin which,

.Fig. 1 is a'plan of a machine constituting a preferred embodiment of this invention; Fig. 2 is a diametrical sectional view of the same, showing'the molds and pump inelevation;

Fig. 3 is a plan of a modified form of the invention in which the molds are indexed to their proper positions and the pump is power-operated;

vation;

automatic imeans forcontrolling the pumping 1 of 5-: metal into the mold when the mold reaches theposition in aicircle aroundthe furnace 1 so that :Fig. 6 is a diametricalgsectional:view of thesame showingthe pump and molds in sideeleva-i proper'position and'while it is in motion;

' tion;

4W Figs. '7 and 8 are detailed side elevations of. different .parts of the automatic controlling means;

Fig. 9 is a machine with a gravity fed melting pot constitut-' ing anotherimodificationand with details eitheoperating mechanism omitted, and

Fig. 10 .is a sectional view of the pot and fan,

nace with the molds insection.

It is old to cast metal in aseries of-molds mov-.-. able, one after the other, into casting position,

- I 6 Claims. I (01'. 22-2) Fig. 4 is a diametrical sectional view of the: same showing the" pump-andmolds in side 818- plan of a conveyor type of casting;

matrix has to be inserted inreaoh mold for each plateand this matrix has to be stripped from the'mold and the plate has to be removed.

"This invention involves, in addition to the ating the-pump whenthe mold is closed and thepump and mold are in registration, means for pumping. the metal into the mold operated by rotation'ofthemold about the pump, means for moving the pump, or at-yleast its spout, along in unison with the mold as it is being poured and other features individual to theseveral modifica-;

'tions shown. Referringto Figs. land 2 the furnace'l pro-- vides a support fora-circular supporting ring -2. 0- On this ring and extending down into it is mounted the metal pot 3 of .arusual well known construction. On the, ring is mounted a bracket 4, which consists of a series of arms radiating from the center. This bracket is stationary. It supportsat the.-center,-by a flange 1 4, a-pump 5 provided with a spout 6 carrying a lug 7 This lugis provided with a cross pin on which is pivotally mounted an operating handle 8 projecting out in a convenient position for the operator to manipulate it. This operating handle is connected by a link 9-with a pump rod 10 on the bottom} of which is the plunger 11; Thepump is swiveled and-capableof turningon acentral axis.

When'the operating handle 8 is pulled down. 5-.

by the operator, the plunger 11' israised past a" I series'of inlet port holeslZ of the pump 5 and a predetermined quantity of metal is forced through the spout 6 into one of the molds 13. There are,

a number ofthese molds placed in stationary by the 'operators pressing sideways on the handle, the spout and pump are moved around so that the spout will register -with' each mold in suc-: cession1- At this time the handle is depressed and the next moldis filled. 7 A

'be takeni-out and the cast plateremoved. The j matrix has to be replaced by another matrix, or the same'one, and the mold closed before the pumpspout getsaround to register with it again. By that time the mold has time to cool and one pump can be employed to supply a number of molds. This is a very simplehand-operated arrangement.

. In the form of the invention shown in Figs. 3 ill) and 4, the same kind of molds 13 are employed but they are provided with flanged rollers 17 at the top and bottom which run on tracks 18secured to the side of the furnace and in this case in circular form. Power is imparted for the movement of these molds around the track through a shaft 19 operated from any desired source of power and connected to operate a rotating wheel 20 having a pin 21. This pin cooperates with a Geneva. wheel 22 to rotate it intermittently in a manner that is well understood. This Geneva wheel has a gear 23 meshing with a pinion'24 and therefore operating this pinion intermittently. As a matter of fact the pinion is rotated a complete rotation on each partial ro tation of the Geneva wheel and then, of course, stops. This pinion is mounted on a shaft, 25 on which there is another gear 26 meshing with a gear 27 on a jack shaft 28. This shaft is provided with a pinion 29 meshing with a circular rack 30 on whichthe various molds are mounted.

It will be seen therefore that these molds are all given an arcuate motion of translation throughout a definite part of the tircle on which they are mounted and then stopped. When they are stopped one of them is filled with molten metal. i 1

On each mold is carried two pairs of contacts 31 arranged in series with 'each other in a circuit 34 so that only when the moldis closed and in proper angular relation with respectto the machine will' this circuit 34 be closed. One pair of brushes 32, of course, is in engagement with its .contacts when the mold is in proper position and another pair33 when 'the mold is closed.- This circuit 34 controls the operation of a motor 35 which has a worm 36 and other gearing 3'7 operating a gear segment 38. While'the circuit 34 is .closed the motor is operated to lower this gear segment and through the link 9 raises the pump plungerrod 10 and its plunger 11. mold through the spout 6 as in the other case.

It will be seen therefore that, in the form shown in Figs. Band 4, the molds are indexed up to the proper position underneath the stationary spout 6 and thus brought to the proper position for receiving the charge'of molten metal. In this position one of the series of contacts 32 in the motor circuit 34 is closed automatically. Pre- 50 vious to this the mold has been closed, either by hand or otherwise, and the other pair of contacts 33 in this same circuit therefore are closed,

so that the pump is ready to operate to introduce a charge of metal into the mold. The motor can be automatically reversed as soon as these contacts 32 and 33 are opened again to bring the motor back to the position shown in Fig. 4 with the parts ready for another operation. In this case the pump and its operating mechanism are 60 fixed in a stationary position and the molds rotate around the furnace intermittently. The pump is supported in fixed position but otherwise is carried about in the same manner as in Figs.

1 and 2.

In Figs. 5 to 8 inclusive the molds 13 are mounted in a similar manner to that shown in Figs. 3 and 4 but they arerotated differently. In this case an operating shaft 40 acts through bevel gears directly to rotate constantly and at a constant speed the shaft 28 and pinion 29. As

before, this pinion operates an internal circular gear 30 to which molds are secured. This provides a constant instead of an intermittent motion. Each mold carries a stud on which is loosely mounted a lever 46 which is normally held This fills the in the position shown in Fig. 'I by a spring 4'7. This spring acts not only as a torsion spring but as a compression spring to hold the lever 46 over against the mold 13, as shown in Fig. 8.

Thus, it will be seen that with the mold open, as shown in Fig. 8, a projection 48 on the lever 46 will pass by a-projection 49 on the pump spout 6, without operating the pump. However, when the mold is closed, pins 51 thereon are forced by the movable half of the mold 13 to press the lever 46 to the right so that the projections 48 and 49 register.

At this time a roller 52 carried on the rod 46 engages on a stationary cam 53. This contact of the two projections causes the pump spout 6 to move from the dotted line position in Fig. 5 to the full line position. It moves in synchronism of course with the motion of the mold 13 which isatthat time closed and in casting position.

All the other molds are open. The motion of this spout is employed tooperatethe pump 5 to and mold are moving from dotted to full line position, as shown in Fig; 5. v a

- The operation of thepump is accomplished in the following manner. On the stationary-ring 2 is fixed a rack segment 55 and with this segment meshes a pinion 56 carried on a shaft 57 mounted in bearings on the pump spout. On the other end of the shaft is a pinion 58 which meshes with a vertical rack 591carried. by the pump .rod 10. Therefore the movement of the spout, as indicated in Fig. 5, rotates the shaft 57 and raises the pump rod 10 and plunger 11 to deposit a charge of cast metal in the mold as the mold moves along with, the spout. .Whenremove the plates, place them in the conveyor,

change the matrices and close up the molds preparatory to re-casting. This is a continuous operating device as far as the molds are concerned and an intermittent pump.

In Figs. 9 and 10 is shown an elevated type of melting pct 64 carried by the stationary ring 2.

The bottom of this pot carries a rotary valve. 65

for cooperating with molds 13 as they are brought into position registering with the opening through this valve. A chain 66 is attached to each of the molds l3 and provides means for moving the molds in a continuous series into and out of casting position. The molds are supported to run ontracks as in Figs. 3 to 8. N0 means is shown for operating the valve or the chain as they can be operated automatically or manually in any desired way. A non-circular path for the molds may be used as shown so' that the molds may move in a straight-line past the filling valve 65. It will be seen that here is a gravity feeding melting-pot in connectionwith a conveyor for moving the molds preferably intermittently into casting position and moving them away again. Although I have illustrated and described only fourform's of the invention I am aware of the fact that other modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in this respect otherwise than as set forth in the claims, but what I do claim is:--

1. In a multiple stereotype plate casting machine, the combination with a furnace, a melting pot supported thereby, and a pump supported by the furnace and extending down into the melting pot and having a spout projecting out of the furnace, of a series of molds supported outside the furnace, a motor foroperating said pump, said molds each consisting of two parts, one of which is adapted to be moved to open and close the mold, contacts on the mold in series with the circuit for supplying power to the mo tor, and means whereby when a mold in casting position is closed the circuit will be completed and the motor will operate to fill that mold with metal.

2. In a multiple stereotype plate casting machine, the combination with a furnace, a melting pot supported thereby, a pump supported by the furnace and comprising a piston, means supported by the furnace for operating the piston to lift and discharge one mold full of metal at each stroke, a series of stereotype plate molds supported on the outside of said furnace and adapted to be moved into position to receive metal from said pump, and means whereby when a mold is closed and moved into proper position for receiving metal from the pump, the piston will be automatically moved to discharge a full charge of metal into the mold and whereby, if the mold is moved into proper position while open, the piston will not be actuated.

3. In a multiple stereotype plate casting machine, the combination with a melting pot, a pump therein and electrically operated means for operating the pump, of a series of molds, an electric circuit for supplying power to the electrically operated means, two sets of contacts arranged in series with said circuit, means for closing one of said sets of contacts when a mold is closed, and means for closing the other when the mold is in proper position for receiving metal from the pump, whereby the pump will not operate until the mold is closed and in proper position.

4. In a multiple stereotype plate casting machine, the combination with a pump comprising a plunger and a rod thereon, said pump being adapted to turn about the axis of the rod, a concentric track, a series of moldsadapted to move around said track in a circle, means for moving said molds constantly around said track at a constant speed, a stationary rack, a shaft carried by the pump and having a pinion adapted 'to mesh with the rack so that when the pump moves the pinion along the rack, the shaft will be turned, means on said shaft for operating the pump to discharge metal into the mold while it is moving, and yielding means for moving the pump back to original position after the mold has been filled.

5. In a multiple stereotype plate casting machine, the combination of a pump having a reciprocating piston and rod provided with a rack for operating it, a shaft having a pinion meshing with the rack and a second pinion, a. stationary arcuate rack meshing with the second pinion, means for rotating a series of molds around in a path concentric with the pump rod,

means for moving the pump with a mold when it almost reaches casting position and thereby moving said pinion over the rack and operating the piston, a cam in stationary position adapted to keep the pump connected with the mold throughout a certain arc and to disconnect the pump from the mold after that are has been traveled, and yielding means for then returning the pump to its initial position.

6.'The combination of a furnace, a melting pot carried at the top thereof, a valve at the bottom of the pot adapted to be turned'to allow metal to escape from the pot, a series of molds movable about the furnace, located below the pot, and adapted to come in registration with the valve once during each rotation, a track for supporting said mold, saidtrack being non-circular and having aflat side at the point where the valve is located, and means connected with the molds for moving them around the track. ISIDOR TORNBERG.

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