US400781A - Sand-molding machine - Google Patents

Sand-molding machine Download PDF


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US400781A US400781DA US400781A US 400781 A US400781 A US 400781A US 400781D A US400781D A US 400781DA US 400781 A US400781 A US 400781A
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    • B22C15/00Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/10Compacting by jarring devices only


(No Modl.) 2 Sheets-Sheet 1. J. N. MATLOGK.
No. 400,781. Patented Apr. 2', 1889..
N. PETERS. Phumumn m her, Washington. D. C.
(No Model.) 2 Sheets-Sheet 2.
No. 400,781 Patented Apr. 2, 1889.
a ll
SPECIFICATION forming part of Letters Patent No. 400,781, dated April 2, 1889.
Application filed December 20, 1888. Serial No. 294,166. (No model.)
To all whom it may concern.-
Be it known that 1, JOHN N. MATLOOK, of Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Machines for Making Sand Molds, of which.
the following is a specification. Machines have heretofore been constructed in which hydraulic pressure is employed for compressing the sand firmly into the flask and around the pattern; but difficulty has been experienced in detaching the pattern, so as to allow the flask to be lifted oif without portions of the sand adhering to the pattern.
My invention is made with reference to withdrawing. the pattern sufficiently from the sand to detach the contiguous surfaces and to allow the sand mold to be lifted off from the pattern, and also for so adjusting the flask in its relation to the pattern and the bed for the same that the sand-joint between the two portions of the mold can project more or less from the edges of the flask, in order that the sandgoint may be compressed more or less in clamping the two parts of the flask together.
In the drawings, Figure 1 is an elevation at one side of the machine, showing the upper half-flask. Fig. 2 is avertical transverse section at the line 00 as. Fig. 3 is a longitudinal section at the line y y, Fig. 2, showing the 0 lower half-flask; and Fig. 4 is an elevation of one of the swinging keys.
The bed-plate A at the bottom of the machine is adapted to receive the side frames, B, and at the top of the frames B is a plate, 0,
3 5 the upper surface of which is grooved, for a purpose hereinafter set forth, and at each side of this grooved top bed, 0, is a plate, D, se-' cured in position for stiffening the frame and supporting the parts. The hydraulic cylinder .w E rests upon the bed-plate A, and within it is a plston, F, with a piston-rod, G, passing through the stuffing-box 2 in the head E, and at the top of the piston-rod G is a cross-head, H, from which the rods H H pass up through sta- 4 5 tionary guides i and are connected with the follower, as hereinafter described. Above the piston-rod G, and in line with the same, is a stem, I, and the same passes through the guide-plate I, that is bolted between the framesB and the side plates, D, the object of this stem being to aid in maintaining a parallel movement of the piston cross-head and rods as they are moved up and downby the action of water under pressure admitted above and below the piston, because the sand that is packed within the flask and around the pattern does not always present a uniform resistance to the follower, and without the stem and guide-plate the packing of the piston and stuffing-box is liable to become injured by lateral pressure resulting from one rod, H, having greater tension than another.
The follower K is hinged at 5 to the upper ends of the rods II at one side of the machine, so that it may be raised up and swung back or turned over and closed down upon the flask L after the sand has been inserted into the same, and there are rods 6 with adjusting-nuts 7 in line with the rods H and projecting downwardly from the edge of the follower K, and at the lower ends of the rods 6 are eyes, through which passes a rock-shaft, 8, with a lever-handle, 9, and loops 10 at the respective rods 6, which loops can be swung down beneath the hooks 11 on the upper ends of the rods H by moving the lever 9, the loops and lever being fastened to such rock-shaft 8, whereby the follower K can be readily connected with the rods H for applying the hydraulic power to the follower in pressing the sand; or the loops can be disconnected from the hooks, when the pressure is relieved, by turning the lever 9 in the opposite direction, thereby allowing the follower to be swung back from oif the flask to give access to such flask.
Upon the top plate, 0, is a box-shaped frame, M, bolted to said plate O, and upon the top edge of this rests the sand-bed N, and this sand-bed has in it openings corresponding to 0 the outlines or boundaries of the pattern 0. These patterns are to be of any desired character. I have represented patterns adapted to the casting of radiator-pipes. These patterns are grouped together and fastened to 5 the pattern-bed O, the object being to allow the pattern-bed to be raised or lowered for carrying the patterns up into position for the molding operation to be performed, or lowered to detach the patternsfrom the sand sufliciently to allow the flask and sand to be lifted off the patterns. \Vith this object in view the bases of the patterns fit the openings in the sand-bed N sufficiently closely to prevent sand passing into the joint; but the patterns are free to be moved up or down.
Upon the grooved top plate, C, are the wedges P, united together by a cross-bar at their wider ends to form a group, and the under edges of these wedges are provided with ribs to slide in the grooves of the top plate, and upon the under surface of the patternbed 0' are wedges P, corresponding to the wedges P, and the upper surfaces of the wedges P are grooved to receive ribs on the under edges of the wedges P; hence by moving the group of wedgesP endwise the wedges P, pattern-bed O, and patterns 0 will be moved bodily upwardly or downwardly, the pattern-bed O fitting within and being guided by the box-shaped frame M, so that this move ment given to the pattern-bed and pattern will be parallel and vertical, so as not to dis turb the sand that may have been packed around the patterns. The weight of the patterns and the bed 0 and wedges P is sufficient to cause the patterns to descend by gravity as the wedges P are drawn back.
In order to give end motion to the group of wedges P, any suitable device may be em ployed; but I prefer the rock-shaft Q, lever Q, crank Q and connection 15 to the center part of the group of wedges, such wedges being united together by a cross-bar at the end where the connection 15 is made. In moving the wedges P in along beneath the wedges P to raise the patterns it is necessary to limit the motion in order that the patterns may project the proper distance above the sand-bed N. I make use of the screw 16 and adj ustingnuts 1.7, that form a stop at the smaller end of the wedges P, and by adjusting this screwstop the patterns can be raised or lowered for adjusting with accuracy the thickness of the casting, for when the patterns are raised the cavity in the mold will be increased and the castings thickened, and the reverse.
The flask L is to be of any ordinary character. Usually these flasks are made of cast-iron,with walls forming the exterior of the flask. beveled upwardly and inwardly, and with the cross-bars 20 and handles 21 at the ends. The jaws 22, Fig. 3, are upon one flask and the keys 23, Fig. 1, are on the other flask, by which the flasks are brought properl y into position when set together, and there are lugs 24 upon the edges of each flask, over which the clip-keys are driven in placing the two flasks together to form the mold.
Around the box-frame M is a flask-rest, S, in the form of a frame fitting closely around the box-frame M, and capable of vertical adjustment by the screws 25, which preferably pass into lugs upon the top plate, 0. The
flask L rests at its edges upon the top edges of this flask-rest S, so that by adjusting the screws 25 the flask can be raised more or less to vary the sand-joint between the two flasks, as before mentioned, because when the flaskrest is raised, and with it the flask, the surface of the sand, as the same rests upon the sand-bed N, will project slightly below the edge of the flask, or the reverse when the flask-rest is lowered; and in order to adapt the flask-rest to receive either of the two flasks, (that are set together in forming the mold,) I provide at the ends of the flask-rest lugs 30, between which the keys 23 on the flask can pass to hold the flask in position; but when the flask has jaws 22 upon it the swinging keys 31 are turned up between the lugs 30, so as to pass into the jaws 22 upon the flask as the same is laid in place upon the flask-rest. oted at upon the flask-rest, and are held in place by swinging latches 34, that can be turned into position for holding the keys or swung back to allow the keys to be moved away from the lugs 30.
In many instances there are openings in the patterns, and hence the entire sand-bed N cannot be made continuous, and I provide the stripping-plates T with their top edges or surfaces in line with the surface of the sand-bed N. These stripping-plates are supported from the top of the grooved plate 0 by vertical. plates or columns T; hence the surface of the sand in the mold will be level regardless of the extent of elevation or depression of the patterns.
It is now to be understood that the flask-rest is to be adapted to either of the half-flasks by swinging the keys 31 up or down, and then the flask is put in position upon the flask-res t, and the patterns are raised to the proper point by moving the wedges P along beneath the wedges P until the motion is arrested by the screw-stop 16. The sand is now introduced uniformly around the patterns and within the flask, and then the top of the sand is leveled off, and the follower K is swung over upon the sand and the loops 1O swung down to connect with the hooks 11, and the hydraulic power is applied to draw down the follower and to compress and consolidate the sand of the mold. It is to be understood that the sand may be left slightly above the flask to allow for the proper extent of compression; or there may be upon the under surface of the follower K do wnwardly-proj ectin gslabs or boards, to pass into the flask and between the cross bars thereof, to indent the top surface of the sand and properly compress the same within the flask and around the patterns to form the mold. After this has been done the hydraulic piston and follower K are lifted, the loops 10 disconnected from the books 11, the followers K swung back out of the way, and the lever Q moved to withdraw the wedges P from beneath the wedges P, pattern-bed, and pat terns sufficiently to allow such pattern-bed and patterns to descend bodily and separate These swinging keys 3.1. are pivthe patterns from the sand of the mold, after which the flask and sand mold are lifted off, another flask applied upon the flask-rest, the patterns raised by forcing in the wedges P, and the operations are repeated.
I claim as my inventionv 1. The combination, with the follower, sandbed, patterns, and flask, of the flask-rest S and screws for adjusting the flask-rest tovary the sand-joint between the two parts of the mold, substantially as set forth.
2. The combination, with the patterns, of a sand-bed having openings corresponding to the outline of the patterns, a pattern-bed to which the patterns are connected, wedges P beneath the pattern-bed and connected with the same, a grooved top plate, 0, the wedges P, having ribs that fit the grooves in the top plate, a frame, M, around the pattern-bed and supporting the sand-bed, mechanism, substantially as specified, for giving an end motion to the wedges P, and a stop for limiting the movement of said wedges, substantially as set forth.
3. The combination, with the flask, of the flask-rest and means for adjusting the same vertically, a sand-bed within the flask-rest,
patterns occupying openings in the sand-bed, a pattern-bed withwhich the patterns are connected, the plate C and the wedges acting between the same and the pattern-bed, the rock-shaft Q, lever Q, and connection to the wedges P, for raising or lowering the patterns, the stripping-plates T, and connections from the same to the bed 0, substantially as set forth.
4. The combination, with the press, the frame for the same, the sand-bed, and the flask, of a follower, side rods, H, to which the follower is hinged at one side, rods H having hook shaped ends, the rods 6, rock-shaft 8, passing through eyes on the rods, the leverhandle 9,'and the loops 10, connected to said rock-shaft, whereby the follower is connected to or disconnected from the rods H by the movement of the lever 9, substantially as set forth.
Signed by me this 10th day of December, 1888.
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