US236301A - Mold ing-machine - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

J. P. BROADMEADOW.

Moldi'n.g....Ma.chine.

No. 236,301; Pafe'nted Jan. 4,1881

FIELE.

N.PETER. FHOTD-LITHOGRAPMER. WASHINGTON. D c.

(No Model.) 3 Sheath- Sheet a.

J. P; BROADME'ADOW.

Molding-Machine. No. 236,301 A Patented Jan. 4,1881,

FIG--7- IIIIIIIIIIIIIIIIIIIII'IIIIII'IHI'II'IIII'L I.IIIIIIIIIIIIIIIIIIIIIIIIIIIITIJI \X/JTNEEEEE': INVENTDR UNITED STATES PATENT @FFICE.

JOHN P. BROADMEADOW', OF BRIDGEPORT, ASSIGNOR TO PHILO H. SKID- MORE, NEWTOWN, CONNECTICUT.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 236,301, dated January 4, 1881.

* Application filed September 4,1880. (No model.)

To all whom it may concern Be it known that 1, JOHN P. BROADMEADOW of Bridgeport, in the county of Fairfield and State of Connecticut, have invented an Improvement in Molding-Machines for Snap- Flask Molding; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

My invention has for its. objects the supply of an easily-manipulated and an accurateworking machine, and one inwhich the operation cannot be obstructed by clogging with sand.

In such machines as heretofore constructed the working parts are unprotected from the sand, which, falling during the process of molding, clogs the working parts, and thus '20 emba-rrasses or interrupts the operation. Also,

in the snap-flasks heretofore used care has to be employed to wholly remove sand from the upper edge of the drag before applying the bottom board thereto prior to turning over the drag. These defects are removed and ease in manipulation secured by my invention, which consists, chiefly, in the inclosure of the principal working parts of the machine in a box v which excludes sand, and in forming the drag with edges so thin that sand will not remain upon them, but will roll off by its own gravity; and in supplying means foreasily and accurately reversing the drag after the sand has been pressed therein.

In the drawings, Figure 1 represents a front View, and Fig. 2 a top or plan view, of a machine constructed in accordance with my invention. Fig. 3 is a side view, and Figs. 4, 5, and 6 are details illustrating the construction of the drag, cope, and cope-board. The construction of the match-board is shown in Fig. 1 in connection with other parts of the machine. Fig. 7 is a partial vertical section of the machine, made on the line or w in Fig. 2.

The flask is of the same depth as the mold, and is represented'in side elevation, put together and resting on the bottom-board in Fig. 4, a top view of the same being shown in Fig. 5, and a cross-section of the drag in Fig.

6. The cope-board is lettered a; the cope,b the drag, c the bottom board, d.

At 0 e in Fig. 1 is shown the match-board e ,representin g the battens of the same. When the drag c is placed in position on the matchboard the total height of the two is the same as that of the flask with the cope-board removed and standing on the bottom board, as shown in Fig. 4, except that in this figure the cope-board is shown as placed on the cope. The match-board is similar to that used in ordinary practice, except that it has a rod, f, attached to the battens 6, extending at right angles across the rear part of the space between said battens.

The drag a has its upper edge made so thin 6 that sand cannot lie upon it. This is accomplished either by beveling, as shown in Fig.

6, or by lining the drag with a thin metallic plate, g, one edge of which projects from the wooden part, as shown in Fig. 1.

The cope is provided with guide-plates h, in each of which is a hole, 2'. The cope-board is provided with pin-plates j, the pins being bent at right angles, and corresponding in position with the holest' when the cope-board is on the cope.

Pins k are inserted into or attached to the side edges of the match-board, near the front corners, which pins assist in the manipulation of said match-board and the drag, as hereinafter described.

The other parts of the apparatus are as follows: I

A is a hollow standard, in the lower part of which are provided bearin gs for the rock-shaft 8 5 B,whichisope'ratedbythe hand-lever C. From the rock-shaft A projects a short lever, D. Motion is communicated or' pressure transmitted from the lever D to the platen or table E of the machine by means of the bar F. 0n the go inside of the hollow standardare logs with guide-holes, in which work guide-rods G, projecting downward from the platen or table E. When the hand-lever is moved in-t-he direction indicated bythe arrow the platenor table 5 E is raised. I

H is the top-plate of the machine.

An arm, K, projects from the hollow standard at an angle of forty-five degrees from the dotted line a" w, in Fig. 2.

L is a strengthening-rib which extends diagonally across the top plate and has an extension at each end, as shown in Figs. 1, 2, and 3. One of these extensions is pivoted, by the stout rod J, to the arm K. From the other extension descends a stout rod, J, which has at its lower end a nut, boss, or button, M.

N is a bracket or arm projecting from the hollow standard from a point diametrically opposite the arm K. In the outer extremity of the arm N is a slot or recess, 0", into which, when the top plate, H, is turned in the direction of the arrow in Fig. 2, the rod J is brought. In this position the nut, boss, or button M bears against the under side of the extremity of the arm N and supports the top plate against upward pressure in conjunction with the rod J.

To the lower and front part of the hollow standard is pivoted a rock-bar, O. A spring, P, is employed to press this bar toward the hollow standard. The rock-bar O has attached to it, near its upper extremity, a cross-bar, Q. To this cross-bar are pivoted sliding rods 1%, which play freely in slots S formed in the hollow standard. The rods it have formed thereon hooks or stops It, Fig. 3, which limit the motion of the rock-bar O. In the upper extremity of the rock-bar O is a recess or notch, n, Fig. 3.

To the rod J is pivoted a sweep, T, which moves in a horizontal plane, like the top plate. The height of this sweep is regulated by the adjustable collar W.

To the lower end of the rod J is attached a stop, V, which serves to support the handlever when the latter is in the position shown in Fig. 3.

Having thus described all the parts of my machine, it will be seen that those parts liable to be clogged with sand are inclosed in the hollow standard, and thus clogging is prevented.

The operation of the machine is as follows: In the commencement the parts should be in the position shown in Fig. 2, the hand-lever being in the position shown in Fig. 3. The match-board e c is then placed on the platen or table E, with the rod f to the rear. The drag a is then placed on the match-board in the position shown in Fig. 1that is to say, with the thin edge upward. The patternp is then placed on the match-board, and the drag is filled with sand in the usual manner. The sweep T is then moved in the direction of the arrow, Fig. 2, and over the drag, which operation removes the superfluous sand, leaving just sufficient sand to fill the drag properly when compressed. The bottom board, 01, is then laid upon the sand. The top plate is then moved, as indicated by the arrow in Fig. 2, whereby the nut, boss, or button M is brought under the end of the arm N, the rod J at the same time entering the slot in said arm. The hand lever is then moved, as indicated by the arrow in Fig. 3. This, through the intermediate mechanism, presses the table E and the match-board and drag upward, which compacts the sand uniformly in the drag. The top plate is then moved back out of the way, and the operator places his thumbs on the pins K, and the fingers of each hand on the bottom board to hold the latter in place, draws the match-board, the drag and its contents, and the bottom board forward, till the rod f engages the notch or recess a, in the rock-bar 0, said notch being on a level with said barf. Said notch now forms a support for the rodf, and said rod acts as a pivot on which to reverse the parts so drawn forward. To reverse the parts the match-board, drag and its contents, and bottom board are drawn farther forward till they reach the position shown in dotted outline in Fig. 3, and are then turned over on the rod f as a pivot, as indicated by the dotted curve and arrow in Fig. 3. During the entire operation of drawing forward and reversing the hands grasping the parts, as above described, do not relinquish their hold. When the parts are so IGX'GI'SUd they are slid back again upon the table or platen E, with the bottom board on the under side, the matchboard is removed, and the cope placed upon the drag. The cope is now filled and heaped up with sand in the usual manner, the surplus sand stricken oft, as above described, the copeboard placed on the cope, the top plate again moved forward, and the hand-lever brought into play to press the sand into the cope. This completes the mold.

The construction and operation of my invention having thus been fully described, what I claim as myinvention, and desire to secure by Letters Patent, is as follows:

1. The combination of the platen or table of a molding-machine, a hollow standard for supporting and shielding the working parts, a lever for operating said platen, and intermediate mechanism connecting said lever and platen and guiding the platen, said intermediate mechanism being inclosed within said hollow standard, substantially as and for the purpose specified.

2. The combination of the rock-bar O, pivoted to the hollow standard and having the notch or recess a in its upper extremity, and stops which limit the motion of said rock-bar, with the match-board having the rodffor engagement with said rock-bar in said notch, and forming a pivot on which the match-board and parts supported by it may be reversed, substantially as described.

3. The combination of the rock-bar O, pivoted to the hollow standard, and a stop or stops for limiting its movement, substantially as described.

4. The combination of the rock-bar O, pivwood, said metal lining being rigidly attached oted to the hollow standard, and a stop or to the wooden part of said drag, substantially 10 stops which limit the motion of the rock-bar, as and for the purpose specified. and a spring for drawing said rock-bar toward 5 said hollow standard, substantially as de- JOHN BROAD MEADOW scribed. Witnesses:

5. A wooden drag lined with thin metal, the EDWARD H. WALES, upper margin of which projects above the CHAS. M. HIGGINS.

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