US1840342A - Pouring sheet - Google Patents

Description

H. A. W. WOOD POURING SHEET Jan. 12, 1932.

Original Filed Jan. 26, 1927 2 Sheets-Sheet 1 Jan. 12, 1932. H, w. D 1,840,342

POURING SHEET Original Filed Jan. 26, 1927 2 Sheets-Sheet 2 Gash/19 Box I icr? %/y4. 35? 750;

Aw QM Patented Jan. 12, 1932 UNITED .STATES PATENT OFFICE HENRY A. WISE WOOD, OF' NEW YORK, N. Y., ASSIGNOR TO WOOD NEWSPAPER MA- 7 CHINERY CORPORATION, OENEW YORK, N. Y., A CORPORATION OF VIRGINIA POURING SHEET Application filed January 26, 1927, Serial No. 163,683. Renewed May 31, 1930.

, This invention relates to means for mounting a pouring sheet in a stereotype plate castingmold in such manner that the sheet itself may be formed'of rigid material having a thickness considerably greater than that of the usual pouring sheets. Such a thick sheet cannot be carried by the mat carrying clips and is so constructed of course that it will not have .to be flexed with the matrix. Another feature of the invention is the fact that on account of the thickness of the pouring sheet its lower edge can be thinned down to receive the upper edge of the matrix behind it and still the pouring sheet can lie flat G against the casting box so as to engage it all the way from the matrix to the top. This provides more efficient cooling for the tail of the plate. I p

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which i Fig. 1 is a plan of a curved stereotype plate casting mold with the back shown in horizontal section illustrating a preferred embodiment of this invention and showing the mold open;

' Fig. 2 is a similar view in plan and showing the mold closed; I

Fig. 3 is a radial sectional viewof the bottom of the pouring sheet and top'of the matrix showing how they fittogether; and

Figs. 4, 5 and 6 are plans of a casting box with another form of this invention applied thereto showing the parts in three different positions.

In Figs. 1, 2 and 3 I have shown the invention as applied to a mold comprising a cylinder or core 10 and a casting box or back 11 in which these two parts are separated as shown in Fig. 1 for the purpose of delivering the casting and allowing for replacement of the matrix if desired. The matrix is mounted on the usual clips 12 which are turned in the o usual way to strip the matrix from the castj ing and separate it from the back. Ordinarily the pouring sheet has been of thin flexible material and carried by these clips 12. In the present case, I provide a pouring sheet 3 of comparatively heavy material and consisting of a thin sheet which retains its rigidity when supported at its two edges. The pouring sheet is located, of course, at the top of the matrix to receive the metal poured in and protect the mold itself from the overheating and erosion caused by the running of the hot metal down the back.

Instead of supporting the pouring sheet by the clips 12 I mount it on a pair of supports 1 located substantially diammetrically opposite each other. These supports extend out in opposite directions and each one is carried by a guide-pin 5 arranged tangentially. In thisform of the invention the guide-pins are guided in lugs 6 extending from a stationary part of the frame 7. Each pin 5 is provided with a spring 8 and a head 9 behind it, the spring being adapted to pull the supports 4 back into contact with the outer lugs 6 when free to do so and the springs yielding as shown in Fig. 2 to permit the movement of the supports 4: further in toward the cylinder. This brings the pouring sheet into operative position.

As statedabove, the pouring sheet is provided with a thin portion 2 at the bottom having a recess 1 and a shoulder at the top of the recess. hen the pouring sheet is up against the back 11, this recess 1 is just thick enough to receive the upper edge of the matrix under it to form a tight joint to prevent the metal getting in behind the matrix. At the same time, the shoulder is shown as abrupt. The back of the pouring sheet comes into contact with the back of the casting box at this point and engages it throughout itsarea above this line. In this way, the usual air space between the pouring sheet and the back is avoided and the back and pouring sheet co-operateto conduct the heat away from. the casting through an all-metal path. This affords a more rapid cooling of the tail of the casting than has been the case heretofore.

In operation, assuming the mold to be open as shown in Fig. 1, when the back comes up toward the cylinderthe matrix is set back into the concavity of the casting box, by

means Well known, through the operation of toward the cylinder a pair of lugs25 connected with the back engage the extreme ends back is entirely closed the supports 4 are forced forward to the position shownin Fig. and the pouring sheet islet into the back and into engagement with'it'as showninFigfiiiQ It also overlaps the matrix at the bottonrasjust described r In theform shown in the second sheet of drawings, a similar pouring sheet 3 is illustrated formed in the same way i a little diiierently as the castmg box 11 itself carries 'the' pins 5 by" ineanspf lugs 26 onthe casting box. The pouring sheet is carried bysupports Q ilsirhilar to the supports 4 and the pins 5 are secured-to them in the same way and the same springs 84 are used. In this case the moldis shown entirely :open in Fig. i and in'Fig. 5 it'is shown entirely closed; H I 7 When the pouring sheetiefa'ch'e's the position shown in Fig. 6, it is kept from further movement towards the cylinder by being brought into engagement with the front of two stationary lugs 30. l ;The mat bar is shown in acocked position in Fig. 6 andin tliefully closed position in Fig, 5. These mat bars are actuated by the lugs28 ontop of the cylinder as shown in Fig.4. From this it is to be seen that the pouring sheet cannot get any closer to the cylinder than it is permitted to do by the mat bars. As the mold begins to open, the parts vpas'sthrough the positionshown in Fig. 6 in which the pouring sheet is first separated from the casting box as that moves back, and afterwards movesback with it as shown in Fig. 4 to final open position. I

It willbe seen that,'with"this invention, the pour-ingfsheet can be made practically inflexible :and canbe carried in a positive manner and set 'back'into the;casting hox accurately by the operation of the machine. The matrix may be lowered into or' withdrawn from the casting box, either by reach ing down in front of the pouring sheet and pushing the matrix-back and "upint'o the space between the pouring sheet and thebox, or by,raising the entire clipif preferred. The pouring. sheet is more durable than those heretofore employed. It presses back against the mold so that the heat: is conducted away from it more rapidly than has been the case heretofore and it is carried rigidly and positively as above stated. v v

Although'I have illustrated and described only two forms of the invention I am aware of the fact thatother modifications can be but operated 1. In a stereotype printing plate casting box, the combination with the back and core, of a rigid pouring sheet located between the back and core, a pair. of guide-pins located parallel to the direction of separation of the back and corefand supporting the opposite endsofthe pouring sheet,"and"sprin'gs upon thenr'for normally forcing the pouring sheet toward theback 7 p 2. In-a stereotype plate casting mo'ld, the combination with a casting box and cylinder, ofa pouring sheet between the two formed of rigid material and of a general semi-cylindrica l form'g' supports at its straight edges, pins connected with said supports, said pins being slidabjle in the directionof the "movement of the back, springs-on "the-pins for forcing them tangentially, and means for enga'gingthe pins as the back moves up and moving the pinsand pouring sheet to casting position. I

3. In a stereotype plate-casting mold,'the combination -with the cylinder and back, of a pouring'sheet, a pair of guide-pins connected with the opposite ends-of the pouring sheet for supporting it, means on the back for carrying and guiding said pins, and means onthe cylinderior engaging the ends ofthe pins" as the "back and cylinder are brought into casting position and forcing the pouring sheet back int'o the casting box to e seated against the "same;

4. The combination vwith a casting box and means for supporting a matrix therein, of a pouringsheet andmean-scarried by the back, independent 'of the matrix supporting means for-carrying the pouring sheet.

5;In a stereoty'pe'plate castingm'old,the combination with a casting box and means for supporting "a matrix therein, of recipro cable means independent of the matrix supportingmeans for carrying a'po uring sheet in position to 'overlie'the edge of the matrix when the mold is closed'forcasting.

In, testimony whereof I have hereunto af- 1- Li fixedmy signature; 7' A p I V HENRY WISE W OODi made therein by any person skilled in the invention as-expressed in the claims. Therefore, I do not wish to be limited to allthe detailsof construction herein shown anddescribed, but what I do claim is ise

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