US1722555A - Printing-plate-casting machine - Google Patents

Description

July 1929. c, M, BRENNER 1,722,555

PRINTING PLATE CASTING MACHINE Filed A ril 17. 1926 2 Sheets-Sheet 1 1111mm; i

July 30, 1929. C.'M. BREMNER PRINTING PLATE CASTING-MACHINE Filed April 17, 1926 2 Sheets-Sheet 2 Patented July 30, 1929.

uairro stares earner orrica.

CHARLES M. BREMNER, OF CHICAGO, ILLINOIS.

PRINTING-PLATE-CASTING MACHINE.

Application filed April 17,

- section or jigger section of the paper, and it is essential that this fudge section be capable of quick change for printing late news events,

baseball scores inning by inning, etc., without disrupting the make-up of the remainder of the sheet. This fudge section is printed from separate fudge plates which can be quickly mounted in printing position and quickly substituted by different plates without affecting the printing set-up of the remainder of the sheet.

The present invention relates primarily to the casting of these fudge plates, and particularly to fudge plates of the curved type for use on rotary presses. It is imperative in newspaper work that these fudge plates be cast in the shortest time possible if the full advantage of the fudgesection is to be retained, the necessity for speed in this casting operation being particularly true where there is a considerable number of presses to be supplied with fudge plates.

It is the primary object of the present invention to provide a device for casting these fudge plates which will. have a maximum speed of operation. To this end I have incorporated as one of the features of the present device means for heating the mold chamber with super-heated steam for quickly bringing it up to the proper temperature for the pouring of-the metal, in cooperation with means for cooling the mold with a sprayed discharge of cooling water for quickly cool-, ing the mold to secure a quick setting of the metal.

Another object of the invention is to provide an improved arrangement of mold members adapted for quickness and facility of operation, and characterized by an inner stationary mold member or core of cylindrical form having its axis extending horizontally 1926. Serial No. 102,634.

and an outer movable mold member of segmental form adapted to embrace one side-of the stationary mold member.

A further object is to provide an improved inlet through which the molten metal is poured into the casting chamber which inlet can be heated and chilled rapidly by the circulation of steam and water therethrough, similarly tothe heating and chilling of the core member.

A further object is to provide an improved arrangement of operating and latching handle for the outer or movable mold member.

A further object is to provide an improved arrangement of matrix confining rings, and method of holding the same.

A further object is to provide an improved form of readily removable clip which will hold the upper edge of the matrix sheet against the front of the pouring inlet to prevent type metal from entering between the back of the matrix and the outer mold member.

Other objects and advantages of myinvention will be apparent from the following description of a preferred embodiment thereof.

In the drawing illustrating this embodiment:

Figure 1 isa front elevational view of'the present casting device Figure 2 is a side elevational view of the same, the dotted lines illustrating the position taken by the movable mold member when the mold is open;

Figure 3 is a vertical transverse sectional view, taken on the plane of the line 3'3 of Figure 1; e

Figure 4 isv a longitudinal sectional view taken approximately on the plane of the line 4-4 of Figure 3; and V Figure 5 is a side elevational view of the matrix retaining clip removed from the casting device.

The two mold members are indicated at 10 and 11, the mold member 10 being stationary and the mold member 11 having pivotal movement toward and away from the mold member 10, the two mold membersdefining a castingchamberfitherebetween. Thestation I erg meld member or core 10 comprises a cy inlet.

'lindrical drum 10, the ends of which are standard 16. The upper end of this standard 16 is formed with an arcuate attaching portion 17 which embraces a part of the back of the core member 10, cap screws 18 pass- .ing through this attaching portion 17 and threadlng into the core member for rigidly securing the core member to-the standard.

The movable mold member 11 comprises a casting in the form of a segmental or arcuate plate 11 of proper curvature to embrace concentrically the lower and front portions of. the core member 10. The side edges of this arcuate plate are formed with relatively deep flanges 11 and the intermediate width of the. plate is formed witha plurality of parallel ribsor flanges 11 for ire-enforcing the plate and for dissipating the heat. Two pivot arms 21 are secured to the lower corners of this arcuate plate by screws 22 which thread into the flanges 11 These pivot arms have pivotal support on a pivot bolt 23 which passes through the standard 16 from side to side thereof.

Mounted on top of the stationary' mold member is a casting 25 which definesthe sides and back of the inlet 26, through which the molten type metal is poured into. the mold chamber 12. The sloping Wall 26 of this casting defines the back wall of this inlet, and the flaring side walls 27 define the side walls of the same. The front of this pouring inlet is defined by a plate 28 which is attached to the movable mold-member 11 and'moves therewith. A flange '29-at the lower edge of this plate 28 abuts a flange 31 extending across the top of the arcuate plate 11 and cap screws 32 passing through both 0f these flanges secure the plate 28 to the movable mold member. 6

The casting 25 is secured to the stationary mold member 10 by screws 33 passing through 1 attaching ears 34and threading into the core 10 and by screws 35which pass through a lip 26 which is recessed in the upper surface of the core 10. V

I have provided means for rapidlyheating and cooling the stationary mold member-10, and also the casting 25 defining the pouring For heatingthe core member 10 a steam inlet pipe 37 threads into a boss 38 formed on the end head 10 for discharging steam into the upper part of the core cham ber. For cooling this core member 10, a water supply pipe 39 threads into a boss 41 on the other end head 10 for discharging cooling water into the interior of the core. This cooling water is preferably sprayed around the entire interior of the core, and to this end the cooling water is discharged from apertures 43 in an axially aligned spray pipe 42, which screws into the boss 41 in communication with the water supply pipe 89. An end cap 44 closes the end of this spray pipe 42, this end cap also having spray apertures if .desired. This spraying of the entire interior of the core will result in the complete wetting of the interior of the core in the shortest possible time and a rapid cooling action. The discharge of water and steam from the hollow core 10 occurs through a discharge pipe 46 which screws into a boss 47 formed on one of the end heads, this discharge pipe communicating with the interior of the core at approximately the bottom of the core chamber so as to result in substantially complete drainage of the core.

The casting 25 which defines the pouring inlet 26 has a jacket or fluid circulating chamber 25 formed directly behind the wall 26. A steam inlet pipe 51 screws into a boss 52 on one side of this casting, and a water inlet pipe 53 screws into a boss 54 on the other side of the casting. A discharge pipe 55 screws into a boss 56 in the rear of this casting end at a relatively lowpoint for substantially draining the cha1nber25. The pipes 87 and 51 areconnected to asuitable source of steam supply, preferably superheated steam, and the flow through both pipes '37 and 51 may be controlled by separate valves or by a single valve for simultaneous admission of superheated steam to both chambers.

Similarly,-the watersupply pipes 39 and 53 are connected to any suitable source of water supply, and the inflow of water through these pipes can be controlled by separate valves or by a single valve. The two discharge pipes 46 and 55 may also be con trolled by separate valves or by a single valve for conjoint operation.

The matrix on which the master impression is formed is indicated at 58, this matrix being held against the concave inner surface of the movable mold member 11. The lower end of the casting chamber 12 is defined by a bar 59-which extends longitudinally of the core member 10 along the bottom thereof, being secured to this core member by screws 61. In placing the matrix 58 in the movable mold member, a tail or end portion 58 is left extending beyond the end of the casting chamber for engaging With this bar 59 to effect sealing contact with the underside thereof. The sides of the casting chamber 12 are defined by matrix holding rings 6262 which engage between the stationary and movable mold members 10 and 11 along the edges or sides of these mold members. Each of these matrix holding rings extends upwardly from the'front side 'of the bar 59 groove'63 formed in the arcuate plate 11 at each side thereof. The engagement of these flanges 62' in these grooves 63 securely holds these rings against outward displacement, but the rings can be readily removed from these grooves for the placing of a new. matrix.

Each ring is also provided with a retaining flange 62 which is designed to overlap the lateral edge of the matrix substantially as shown in Figure 4. These flanges 62 thus hold the matrix in snugly fitting engagement with the concave surface of the movable mold member, and also prevent the type metal from entering behind the matrix-along the side edges thereof. These flanges 62 are preferably formed with a beveled slope or curve, shown in Figure 4, so as to leave flanges along the sides of the finished plate, which flanges afford surfaces by which the plate can be clamped to the printing roller. The outer side of the cylindrical mold member is formed with a plurality of spaced annular grooves 70 (Figure 4;) which grooves form small ribs on the back of the finished casting.

The upper end 58 of the matrix will extend up into the inlet or hopper 26, and to prevent any possibility of the poured type metal from I entering behind this upper edge of the matrix I have provided a removable spring clip 65 I which will hold this upper edge against the metal is riveted to the plate 66 through this plate 28. This spring clip is illustrated in Figure 5 and comprises a sheet metal plate 66 of a width substantially equal to the width of pouring inlet 26. This plate'66 is formed with a rolled or beaded upper edge 67 and inserted in this beaded edge is a short section of round bar 68. A spring finger 69 of sheet section of bar 68, this spring finger being adapted to engage over the outer side of the,

plate 28. Thus, after the matrix has been placed in the movable mold member with the matrix retaining rings 62 engaging over the side edges of the matrix, the upper end 58" of the matrix is held against the inner side of the plate 28 and the'spring clip 65 is then inserted over this plate and over the end of the matrix so that the clip plate 66 will press the upper edge of the matrix against the plate or wall 28, whereby any possibility of the type metal entering behind this upper edge of the matrix is prevented. This spring clip can be instantly removed by merely pulling upwardly thereon when a matrix is to be re moved or substituted.-

The movable mold member is raised to cast-" ing position and is latched or locked 111 this casting position by an operating and latching handle 72.

This handle extends across the. ,width of the movable mold member and has its'ends secured to arms 73 whlch are PlVOtBCl" at 7 4 to the opposite ends or sides of the movable mold member. For effecting the latching engagement, hook-like extensions 73 extend inwardly from each of these arms beyond the pivots 7 4, each of these hook-like extencam surfaces or be otherwise constructed so that they will exert a camming pressure, as the handle is forced down with the mold closed. Small brackets orplates 76 are se-v -cured to the movable mold member .directly below the arms 73 to provide limiting stops limiting the tilting movement of the handle in the operation of raising the mold member to closed position. A second handle 77 extends laterally from the movable mold member at one side thereof, this second handle being preferably aligned with the pivot 74, whereby the movable mold member may be held in raised position through this handle while the other handle is rocked downwardly to effect the latching engagement between the latch ends 7 3 and the studs 75.

In the operation of this casting device the matrix 58 is placed in the concave outer mold memberll with the matrix confining rings 62 removed, these rings being then quickly and easily inserted in their grooves 63 for holding short distance, andthe spring clip 65 is now snapped over the plate 28 and this edge 58 of the matrix, firmly clamping this edge of the matrix against this front wall of the pouring inlet. The mold member His new swung up to casting position, where it is latched by the latch extensions 7 3. The cylindrical mold member, and the back and sides of the pouring inlet are now brought up to proper temperature 'by admitting steam through the inlet pipes 37 and 51 to the mold member and to the chamber 25. The type metal is now poured through theinlet 26, and this pouring can be performed relatively rapid because the air has opportunity to escape along'the entire upper edge of the casting-chamber 12.

After the casting chamber has been filled with type metal the supply of superheated steam is cut off and cooling water is admitted through the pipes 39 ant 53 to cool the chamber in the mold member 10 and the chamber 25. This cooling action is relatively rapid and hence the casting can be chilled in a very short time. As soon as the casting has been chilled to the proper point the latch handle 72 is tripped and the movable mold member 11 is swung downwardly thereby aii'ording quick easy access tothe casting for lifting the same directly from the movable mold member. The mold is again closed andlatched and the inflow of cooling water substituted by an in= flow of superheated steam through the pipes 37 and 51 for bringing the unit up to casting temperature again. Thereupon the. same cycle of pouring the type metal and chilling the same is repeated. The heating of the casting which defines the inlet 26 is advantageous in that it avoids any tendency of the type metal to congeal in the inlet and obstruct the same, while the cooling thereof avoids any tendency for this inlet to absorb and retain high temperatures and thereby delay the chilling operation. The movable mold member 11 is thermally insulated more or less from the temperature of the type metal by the matrix 58, and accordingly this mold member does not undergo any large changes in temperature.

It Willbe apparent that considerable modivfication and re-arrangements of parts may be made in the foregoing construction without departing from the metes and bounds of the invention. 7

Iclaim:

In a casting device of the class described, comprising a base plate, a standard rising from said base plate, a hollow cylindrical mold member supported on said standard with its axis extending substantially horizontally, an arcuate mold member adapted to embrace a portion of said cylindrical mold member to define an arcuate casting chamber therebetween, arms extending from said arcuate mold member, means pivotally attaching said arms to said standard, latch I means for holding said mold members in casting position, plates extending upwardly from each of said mold members and adapted in Y the closed positionof said mold to define an inlet into said casting chamber through which the type metal is poured, and means for alternately admitting heating and cooling fluids to said hollow cylindrical mold member for heating and cooling the same.

2. In a casting device of the class described, the combination of a base plate, a standard rising from said base plate, a hollow cylindrical mold member rigidly attached to said standard with its axis extending substantially horizontal, an arcuate mold member adapted to embrace a portion of said cylindrical mold member for definlng an arcuate casting chamber therebetween, pivot arms extending from said arcuate mold member having plvotal attachment to said standard, a pair of matrix confining rings adapted to engage between said mold members for closing the sides of the casting chamber, said confining rings having confining flanges overlapping the lateral edges of the matrix and having retaining flanges adapted to re leasably engage in grooves in said arcuate ,mold member, latch means for holding said mold members in casting position, plates extending upwardlyfrom each of said mold me1nbers,--adapted to define a pouring inlet communicating with the upper part of said casting chamber when said mold 'members are in closed position, and means for alternately admitting heating and cooling fluids to said cylindricalhollow mold member for heating and cooling the same. i

3. In a casting device of the class described, the combination of a mold comprising a horizontally disposed cylindrical mold member, an arcuate mold member adapted to embrace a portion of said cylindrical mold member to define an arcuate casting chamber therebetween, pivot means for movably supporting said arcuate mol'd member, an operating handle pivotally supportedto-said arcuate mold member, and latch means actuated by said operating handle for holding said mold members in casting position.

4. In a casting device of the class described, the combination of a mold comprising a horizontally disposed cylindrical mold member, an arcuate mold member adapted to embrace a portion of said cylindrical mold member for defining an arcuate casting chamber therebetween, said mold members having pivotal movement for opening and closing said casting chamber, a casting superposed on said cylindrical mold member and defining three sides of a pouring inlet communicating with the upper part of said casting chamber, said casting being hollow, a plate ,extendingupwardly from said arcuate mold member defining the other side of said inlet when the mold is closed, and means for alternately admitting heating and cooling fluids to the in-. terior of said hollow casting for heating and cooling said inlet.

5. In a casting device of the class described, the, combination of a mold comprising a horizontally disposed cylindrical mold member, an arcuate mold member adapted to embrace a portion of said cylindrical mold member tov define an arcuate casting chamber therebetween, pivot means for movably supporting said arcuate mol-d member, an operating handle pivotally supported to said ar- .cuate mold member, latch means actuated by the combination of a mold comprising a horizontally disposed cylindrical mold member, an arcuate'mold member adapted to embrace a portion of said cylindrical mold member .to define anarcuate casting chamber there between, pivot means for movably support mold members are in closed position, and" ing said arcuate member, latch means for means for alternately admitting heating and holding said mold members in casting pocooling fluids to said cylindrical mold mem- 10 sition, plates extending upwardly from her for heating and cooling the same.

5 each of said mold members adapted to In witness whereof, I hereunto subscribe defineapouring inlet communicating with the my name this 8 day of April, 1926. upper part of said casting chamber when said CHARLES M. BREMNER.

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