US1779523A - Plate casting and finishing machine - Google Patents

Description

Oct; 2 8, 1930. H. A. w. WOOD I PLATE CASTING AND FINISHING MACHINE Original Filed Jan. 28, 1927 3 Sheets-Sheet 1 W. a M W illlmllll Oct. 28, 1930. H. A. w. WOOD PLATE CASTING AND FINISHING MACHINE Original Filed Jan. 28. 1927 43 Sheets-Sheet 2 Oct. 28, 1930. H. A. w. wobo 1,779,523

PLATE CASTING AND FINISHING MACHINE Original Filed Jan. 28, 1927 S'Sheets-Sheet 3 Patented Oct. 28, 1930 TEKSTATas PeTsET oFFIcE" HENRY A. WISE WOOD, or NEW Yonic, N. Y., AssIenon T woon NEWSPAPER MA GI-IINERY CORPORATION, or NEW YORK, n. Yl, A CORPORATION or VIRGINIA I ELA'IE CASTING AND FINISHING MACHINE Application filed Januar 28, 1927, Serial No. 164,227. Renewed September 1929.

can be stripped fromthe plate and the plateremoved, and especially to perform all'of these operationsby 'a single rotation of the 15"core. The invention'also involves the operapartly rotated and the ring drawings in which.

tion of a casting bar at thelower edge of the plate to maintain it in position while the ribs on theback of theplate are being smoothed down on the concavesideand allow itto be.

removed automatically when that operation is completed to allow the plate to be'ejected.

Other objects and advantages of the invention will appear hereinafter.

Reference istobe had to the accompany? Fig. 1 is a side elevation of a mach-ineconis broken off the casting ready for the next operation; I 5 c r p V Fig. 3 is a similar view showing the core partly finished V.

3 with the plate entirely finished and the. core rotated around to a position in which "ghekplate has started to be ejected from the ac V 5 is a similar view showingtheplate entirely ejected and the matrix being stripped therefrom; and r Fig. 6 is a sectional view of the means for operating the casting bar, the position here being intermediate 7 between" the positions shown inFigs. 3 and 4.

In my prior application, Serial l lo. 632,639, 4

'filedApril 17, 1923, I have shown. a machine of inside of the plate.

this type in which the plate, together with the matrix is ejected from the boxby the first half revolution of the core so that the matrix can be stripped from the plate, then the plate during the next half revolution is entered into the mold in the place it formerly occupied. On the start of the-second revolution of the core, the plate was shaved by a knife carried by the core and on the second half of the second revolution the plate was finally ejected ready to beremoved. Two

revolutions of the core were required tocomplete the cycle of operations necessary to. make a finished plate'and present it in a posi tion to be removed from the mold.

In this invention these operations are ac,

complished in a single-revolution of the. core,

thus simplifying the machine in many reef spects.

I have shown the invention asapplied to a machine mounted on. a frame 9 provided with a power driven shaft 10 which rotates w constantly. This shaftis providedwith arotating clutch section 11 slidingly keyed to' it and adapted to be moved by a hand clutch lever 12 into position to clutch it to a worm 13 rotatable and freely mounted on the shaft 7 10. This worm operates a. worm wheel 14' fixed ona shaft 20 and causes that shaft to rotate when the lever is moved in to. connect the clutch; This lever 12 is provided with a lug15 which is controlled by a cam 16 having anotch for receiving the lug 15 this cam being fixed on the worm, wheel or shaft 20.' I Therefore when theworm wheel and the Fig. 4 is a' similar view showing the parts" about 180.from the positionshown inFi'gp shaft 20 have rotated a completerevolution the hand lever can be moved in to release the g clutch and stop the machine.

The machine as shown-comprises a sta tionary concave back 21 for receiving a matrix Magainst which the metal is to be cast to form a printingplate. The flat face of the back is located at an inclination so the I metal can be introduced along a straight edgeat the top. The other side of the-mold.

.is formed by a convex core 22 of semi-cylindrical form fixed on the shaft 20 and rotat- The send-cylindrical mold formed by these two parts is provided on each straight edge with a radially slidable matrix bar 25.

On a shaft 26 is pivotally mounted a casting bar 33. This is shaped to cover the edge of the matrix bar, grip the edge of the matrix thereto. and seal that edge of the mold. This bar with the two hubs by which it is mounted on the shaft 26 and projections 34 constitutes a lever. Two springs 35 are provided, connected with stationary lugs 36 on the back for normally holding this bar out of casting position as shownin Fig. 5. On the shaft 20 is a cam projection 27 which engages a lever 28 having a hook 29 for engaging a lug 30 on the casting bar 33 and normally holding the casting bar in position to seal the lower edge of the mold as shown in Figs. 2 and 3. Once during each revolution of the shaft 20 the projection 27 unlocks the bar and then the springs 35 pull it into open position as shown in Fig. 5.

On the pouring side the mold is provided with a pouring gate 37 the details of which will not be described herein as any gate can be employed. I prefer to use a gate described in a prior application Serial No. 108,632, filed lVIay 12, 1926, which operates to break off the tail of the plate as shown in Fig. 2 and leave the plate ready for the rest of the operation. The matrix bars 25 are forced inwardly to clamp the edges of the matrix by cams 41. One of these cams is located on the shaft 26 and the other on a parallel shaft 26 connected to operate simultaneously with the shaft 26. The latter is operated by a handle 42. The pouring spout 37 cooperates with the upper matrix bar to hold that edge of the matrix.

The core which is semi-cylindrical in form, is provided with an ejecting bar 38 arranged radially and fixed to the lower edge of the core as it appears in casting position. This cooperates with the bars 25 and 33 to complete the lower edge of the mold. The core is also provided with a bar 39 arranged radially at the opposite side of the core for smoothing the interior of the plate. Likewise the core is provided with a projection 40 for supporting the plate when it is ejected from the mold as shown in Fig. 5.

The operation of the machine is as follows:

In Fig. 2 the mold is shown closed and filled with metal and also the pouring gate 37 is shown shifted laterally to break off the tail and release the upper edge of the matrix. This gate is manipulated to get rid of this tail by turning the handle 42 which through an arm 13 and link 4% raises the gate and moves it out of the way of the rotating parts during their subsequent operation. This operation also turns the shafts 26 and 26 to release the edges of the matrix.

Now the operating handle 12 is moved back to move the lug 15 from the notch in the cam 16 and close the clutch. The shaft 20 now rotates a complete revolution, the first part of which is indicated in Fig. 3. Here the bar 39 is shown as smoothing the interior ribs of the plate and bringing them down to a cylindrical surface ready to be applied to the printing cylinder of the press. The casting bar 33 remains in closed position at this time on account of the latch or hook 29. When half a revolution has been completed, the plate is entirely finished on the back. At this time the projection 27 engages the lever 28, lifts the hook 29 and frees the casting bar 33. The springs 35 pull this bar back and at the same instant the ejecting bar 38 comes around and engages the rear of the plate at the top. The position of the parts just after this occurs is shown in Fig. 4.

Now the plate with its matrix is being ejected on the second half of the first revolution of the shaft 20. The end of that operation is shown in Fig. 5. ported by the projection 40 on the shaft 20. The matrix can be taken ofi", then the casting removed in any desired direction and the matrix put back in the mold. The handle 42 is brought back tothe position shown in Fig. 2 and the matrix bar 25 at the bottom and the corresponding bar radially opposite at the top are forced in by the cams 41. The pouring spout or sprue 37 is brought down by the same operation into casting position and the machine is ready for a second cycle of operations.

This accomplishes the results of the above specified application by one rotation of the shaft 20 and thus simplifies the organization of the machine. The machine is stopped when a complete rotation is finished by holding the starting lever in position for the lug 15 to rest against the core cam 16 and enter the notch therein when it registers with it. This necessitates the separation of the clutch just at the time when a complete revolution is made and prevents its stopping at any other point. The ribs on the back or concave face of the plate are shown in this case as being smoothed off to a uniform surface by pressure of the bar 39 having a comparatively blunt edge, instead of being shaved off in the usual way. It is to be understood, however, that a sharp shaving blade can be used without reorganizing the machine in any way. The pouring gate 37 can be operated as in a prior application of Hans C. Jordhoy, Serial No. 108,632, filed May 12, 1926.

Although I have illustrated and described only a single form of the invention I am aware of the fact that 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. There fore, I do not wish to be limited to all the The plate is sup- 1 details of construction herein shown and described, but what I do claim is:-

1. The combination with a stereotype plate casting back of segmental form, of a core having a convex surface rotatable therein between which and the back theplate is adapted to be cast, means rotatable with the core for smoothing the interior of the plate in the back as the core is rotated through the first halt revolution, and means rotatable with the core for ejectingthe plate. j

2. The combination with a 1 stereotype plate casting mold of semicircular shape, of a core cooperating with the back to complete the mold cavity and rotatable on the axis of the back, means for rotating the core a complete revolution and then stopping it, and means on the core and rotatable therewith whereby as the core rotates through the second half revolution the plate will be moved with it out of the back to expose the matrix thereon for stripping, said core be ing provided with means for smoothing the interior of the plate as it rotates through the first half revolution. 7

3. The combination with a stereotype plate casting backof segmental form, of a core having a convex surface rotatable there in, means rotatable with the core for smoothing the interior of the plate while the plate rests against the back in its original casting position therein against the matrix and means on the core and rotatable therewith for ejecting the matrix.

4. In a curved stereotype plate casting mold, the combination with a semi-cylindrical rotatable core and a semi-cylindrical back, of a bar on one edge of the core adapted to shape the interior of the plate as the core rotates through half a revolution, and

bars inwardly.

6. In a semi-cylindrical stereotype plate casting mold, the combination with a semicylindrical core and back, of means for rotating the core a complete revolution, a casting bar mounted to swing on a pivot and adapted to move into a position to close one straight edge of the mold, a latch for holding the casting bar in its closed position, means rotatable with the core for holding the casting bar during part of the revolutionand for releasing it at a definite point in the revolution of the'core;

7. In a semi-cylindrical stereotype plate casting: mold, the combination with a semicylindrical'core and back, of means for rotating? thecore' a complete revolution, a casting bar mounted to swing? on a pivotand adapted to move into a position toclose one straight edge of themo'ld, a latchforholding the casting bar in its closed position, means rotatable with the. core for holding the casting bar during part of the revolution and for releasing it at a definite pointin the revolution of: the core, and means on the core, normally cooperat ingwith the casting bar'forclosing that end of the mold, and in aposition to engage the oppositestraight edge of the casting when the core has rotated through a half revolution to eject the casting from the mold in a circumferential direction immediately after the latch is released.

8. In a stereotype plate casting mold, the combination with a back and core, both semicylindrical in shape and arranged with their flat sides at an inclination to the horizontal, ot' a casting ejecting bar fixed on the core and located radially in position to project over the lower end ofthe mold cavity, a matrix bar projecting over the same end of the mold cavity from the other side, and a casting bar movable to a position between said bars to completely close the mold and having means for holding'the matrix bar in position.

9. In a stereotype plate casting mold, the combination with a back and core, both semicylindrical in shape, of a casting ejecting bar fixed on the core to project over the end of the mold cavity, a matrix bar projecting over the same end of the mold cavity from the other side, and a casting bar movable to a position between said bars to completely close the mold.

10. The combination with a stereotype plate casting back of segmental form, of a core having a convex surface rotatable therein between which and the back the plate is adapted to be cast, means rotatable with the core for smoothing the interior of the plate in the back as the core is rotated through the first halt revolution, and means on the oppo site edge of the core from the smoothing means adapted to engage the rear edge of the plate and eject it as the core rot-ates through the second half of a complete revolution.

11. The combination with a stereotype" plate casting mold of semi-circular shape, of a core cooperating with the back to complete the mold cavity and rotatable on the axis of the back, means for rotating the core a complete revolution and then stopping it,said core being provided with means for smoothing the interior of the plate as it rotates through the first half revolution, and means on the opposite edge of the core from the smoothing means adapted to engage the rear edge of the plate and eject it as the core rotates through the second half of a complete revolution.

12. The combination with a stereotype plate casting back of segmental form, of a core having a convex surface rotatable therein, means rotatable with the core for smoothing the interior of the plate While the plate rests against the back in its original casting position therein against the matrix and means on the opposite edge of the core from the smoothing means adapted to engage the rear edge of the plate and eject it as the core rotates through the second half of a complete revolution.

In testimony whereof I have hereunto affixed my signature.

HENRY A. WISE WOOD.

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