US24168A - Improved molding-machine - Google Patents

Description

' llNrTn STATES FFICE.

CHAPMAN WARNER, OF NEW YORK, N. Y.

IMPROVED lVIOLDING-IVIACHINE.

`Specification forming part of Letters Patent No. 24, E68. dated May 24, 1859.

To all whom t may concern:

Beit known that I, CHAPMAN WARNER, of the city, county, and State of New York, have invented a new and Improved Molding-Machine, and I do hereby declare that the follow'.- ing is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure l is a plan of the machine. Fig. 2 is a vertical longitudinal section through A B, Fig. 1. Fig. 3 is a vertical cross-section through G'D, Fig. 2. Fig. l is a plan of the iiask. Fig. 5 is a cross-section of the flask through E F,.Fig. 4. Fig. 6 is also a crosssection of the same prepared for pouring. Fig. 7 is a plan of the follower.

My invention consists in the construction of a molding-machine combining the following processes and arrangements: rIhe supply of sand necessary for the flask is regulated by being conveyed in a reservoir divided into several compartments, each of which is successively and separately discharged into it with any required velocity'. Uniformity and compactness in the distribution of the sand upon and around the pattern is secured by means of two shafts lying in the same horizontal plane parallel to each other, 'and each furnished with one or more blades placed under the discharging-point of the sand-box, and which, re

volving rapidly andrin opposite directions,.

strike the falling sand and project it with force into the flask. The accomplishment of the same object is provided for, independently of the revolving shafts, by elevating the box to such a height that the momentum acquired by the sand falling in given quantities will be sufficient for that purpose. And in case still further compression of the sand than that obtained by the preceding methods shall be found necessary, it is secured by the use of a plate or follower, which in shape conforms to that of the internal surface of the flask and of thek pattern which it contains, and which is pressed down by a lever or roller, or a combination of of inclined surfaces, which rest upon corresponding surfaces of a movable frame below it, by which it is supported, so that when the supportingframe is drawn backward or forward the table containing the pattern is thrown up or down, the pattern passing through an opening in a plate which serves as a molding-board to the flask. The two parts of the flask are connected firmly together by means of overlapping plates (in connection With hinges) inserted in the ends of each, through -the lap of which a pin is passed.

To enable others skilled in the art to make and use my invention, I proceed lto describe its construction and operation.

The external outlines are given` to the machine bya frame, A, Figs. l, 2, which serves to connect and compact the various parts and to facilitate the different operations connected with the process. The size and proportions ofy this dependsomewhat upon the species of casting to be made. 1 It is composed mainly of upper and lower posts, A A', Fig. 2, four or more of each, as may be necessary, properly connected and stiffened by sills and braces. The upper ones, A, slide up and down upon the lower, A, being guided by a tongue upon the face of the one fitting into a groove in the face of the other, as seen in Fig. 3, and being kept in close contact by bands a, attached to A and embracing A.

The sand-box is placed near the top of and within the frame, and is sustained by and moves upon slides c, attached to the inner face of the frame. It is divided into a number of compartments, B B, Ste., each of the size required forthe amount of sand it may be deemed proper to throw into the flask at a time, and each with a separate bottom, loose but hinged on one side, F. The rabbet or shoulder e which sustains the bottoms of the compartments is shorter than that upon which the sides ofthe box rest, so that upon passing it, as hereinafter described, the bottom falls, as at F, and its contents are discharged,when it is immediately drawn up again by a spring, as seen in Fig. 2. Directly beneath this point are placed two shafts, G G, whose journals H H rest in boxes attached to either side of the frame-work. They lieV in the same horizontal plane parallel to each other, but with a space between them. In each is lfitted one or more blades, I I, extending their entire length be tween the journals, the width of each being very nearly equal to one-half thespace between the shafts. The end of one of the shafts is so connected (by any of the ordinary methods) with the motive power intended .to be used as to have communicated to it a rapid rotary motion. Cogvwheels or pulleys and belting J transfer this motion reversed to the other. Guide-boards K K are `placed on either side of the opening in the bottom of the sandbox, and, extending downward in an inclined direction toward each other, direct and concentrate the sand as it falls from the box above between the shafts.

To the bottom of and running longitudinally with the frame are affixed guides or ways L` L, upon which moves a strong plate or board,m, with cleats a n upon its under surface. This serves as a foundation upon which the arrangements for the iiask are made. Upon this lies a rectangularhorizontal frame or elevator, o. Through the center of this a timber, p, similar to thosecomposing its sides, passes, being attached to the cross-timber at one end and extending beyond the frame at the other, the extension Q forming a handle by which the whole may be moved backward and forward. Braces may be added to stiffen it when necessary. On the inner face of each side timber is a groove, into which fits the tongue of a guidepiece, R, fastened firmly to the plate below them. This piece determines the extent of the horizontal motion of the elevator, and is therefore as much shorter than the internal length of its frame as the distance through The upper vsurface of the" -the direction of the length of the machine.

The number of these may be increased by interposing one or morefintermediate series, if found necessary, to give a firm support to that which is above them. Over this elevator and supported by it is a table, T, the under side of which is furnished withrinclined surfaces u u, corresponding to those of the elevator below, and which constitue its points of support.

To secure the even contact of the inclines and regulate the motion of the elevator in its effect upon the table, a metal plate, V, (colored blue in Fig. 3,) is let into the incline at either end, and on either side of the table, which, projecting beyond it, fits into a corresponding groove attached to the elevator. Upon this table, which may be perforated for the purpose of relieving it of sand dropping from above, the patterns to be molded are firmly fastened, fw w. Both table and elevator are surrounded by a frame, a: as, which is internally the exact size of the table, its sides acting as'lfguides to prevent horizontal and confine it only toavertical motionf It coincides in outline with the bottom plate, rests upon and is secured to it by hooks y y, while it rises in height to the upper surface of the table when in its elevated position, these three thus forming in appearance a complete box, with the pattern on the top. Within this box thus formed the elevator moves, it being shorter than the table, and consequently than the surrounding frame, through which latter its handle Q projects. At each end, both in the elevator and in the frame surrounding it, openings are left for the escape of any sand which might accumulate in the box.

Over thek table, and'resting upon the frame `which surrounds it, with the external outline of which it agrees in size, is the moldingboard Z. As this might be subject to spring during the operation, if supported only by the frame at the side and ends, additional supports are introduced, as represented by screws in the model, l 1 1, which rest upon and are rmly attached to the bottom plate, and passing through the table, (with the free motion of which they do not interfere,) rise to the under side of the molding-board, their upper surfaces being level with the frame upon which it rests. They numberv of these will be deter mined by the necessities of each particular case. In the moldi ngboard are openings of the exact shape and dimensions of the patterns to be used, and through which they project from the table below as it is raised by the elevator. Upon this board the patterns' for the ingates or pouring-holes are fastened, 2 2.

The flask is composed of two boxes, 3 4, hinged together, the hinges being let into the bottom surface of the sides, which rest upon the molding-board A5 5, Figs. 3, 5, 6. Each has a lid, 6 6, hinged on the sides adjacent to the other box, and both of which during the process of fitting the flask stand upright, as in Fig. 3, and are hooked |to each other in that position. Openings' 7, Figs. 5 and 6, through the outer sides of each form a continuation of the gates molded in the sand by the patterns `on the molding-board. At each end of each box a narrow metal plate, 8 8, Figs. 3, 5, islet into the vertical exterior surface, the upper edge of it 'being even with the upper surface of` the box. The ends of the two overlap. Through this lap a hole is punched, and into it a pin, 9, is fitted, which may be removed or inserted at pleasure. It serves, in connection with the hinges below, to hold the two boxes firmly together while they are lifted from the molding board or plate. Through each end of each box are also vent-holes for the escape of air and gas.

When the flask is to be filled, it is drawn forward, so that the back end of it stands nearly under the opening between` the shafts, but slightly in front of it. The sand-box, being charged, is placed with the front compartment nearly over the same point, but slightly back of it, and near the end of the shoulder which sustains its bottom. A cord or chain attached l to the back of the frame under the iiask passes over a pulley fixed to the front of the external frame, and is fastened at the other end to the back of the sand-box. The shafts being made to revolve rapidly, the iiask is pushed back at the same time by means of the cord, drawing the sand-box forward, the first compartment being at once discharged between the revolving shafts and by the blades thrown into the flask, and as the backward movement of the flask ,continues the forward movement of the sandbox proceeds at the same rate, successively discharging each compartment, as above described. When the flask has been filled, if the sand is found to be not sufficiently compressed, a plateor follower, Fig. 7, of the exact size of the internal area of each flask, and the lower face of `which conforms to the surface presented by the molding-board with the patterns upon it, is placed upon the sand and pressed down upon it by a lever or roller, or a combination ofthe two attached to the external frame, and

so arranged as to work with rapidity and ease. When the sand is in the proper state, the lids of the iiask are shutdown and hooked fast. It is then lifted from the board, the patterns hav ing been previously dropped from the mold by pulling the elevator forward by the handle Q. It is then turned over (the pins above mentioned holding it rigid) and laid down, presenting the appearance in Fig. 5, the lids forming for the time the bottom. The core 10, which in the model described is that of a pipe, is then placed in themold of one side, and the other is shut down upon and hooked firmly to it, when it is ready for pouring, as in Fig. 6.

amic@ i 3 `means of revolving bladed shafts, substantially as herein described.

3. rlhe double-hinged flask constructed and secured by plates and pins, substantially as herein described.

4. The table, constructed substantially as herein described, under and independent of the molding-board, capable only of a vertical motion communicated to it by the arrangement herein described, or any one equivalent thereto, and working in connection with the molding-board, 4'through which latter the patterns, which are fastened on the table, protrude.

5. The mode, substantially as herein described, of supporting the moldingboard from beneath and through the table.

6. The combination of apparatus for packing the sand with thevmode of hinging and securing the flask by plates and pins, and with the vertically-working table apparatus for withdrawing the patterns from the sand through the molding board, supported as above described, and the whole operating substantially as vherein described.

CHAPMAN WARNER.

Vitnesses:

H. L. SOUTHARD, I. C. BUcKHoUT.

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