US213964A

US213964A - In apparatus for withdrawing patterns from molds for casting

Info

Publication number: US213964A
Authority: US
Publication date: 1879-04-08
Anticipated expiration: 1896-04-08

Description

S. J-. ADAMS.

Apparatus for Withdrawing Pattern from Mold for Casting.

No, 213,964., Patented April 3, 1879p 4f ls sq! gal III M UNITED STATES PATENT OFFICE.

sR'JAuviS ADAMS, or PITTSBURG, PENNSYLVANIA.

llPRflll ilfiflT l N APPARATUS FOR WlTHDR AWlNG PATTERNS FROM MO'LDS FOR CASTING.

Specification fdfinilig pal tTifLetters iatenfi N6. 213,964, dated April 8, 1879; applicatibii filed January 28, 1879.

.Tp alt whomdtmaymncern:

Be it known that I, S. Jaavrs 'ADAMS, of Pitts'biirg,-in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Improvement in Apparatus for Fprming Molds for Castings; and I do hereby declare the'followiug to be a full, clear, and

exact deseriptionthereof, reference being bad to the accompanying drawings, forming a part of this specification, in. which! 1 is'a face view illustrating part of my invention;' Figs. 2 and 3 are side views. iFig. 5 is a sectional view through the line a: w, Fi'g. 3. Fig. 5 is a perspective view, showing {one form of apparatus for withdrawing the pattern. Fig. 6 illustrates the method of cutting oil the mold; and Fig. 7 is a view of the reservoir bottonrboardz Like letters of reference indicate like parts in each.

My invention relates to apparatus for forming molds'in sand for making iron, steel, and

ther metal castings. Heretofore much diffiulty has been experienced at difierent stages in the formation of these molds, among which the following have been particularly noticed: Wherea reservoir was used in forming molds,

either by jarring or pressing, it has been ex-v ceedingly diflicult to cut the sand so as to separate the flask and reservoir evenly, audit has been found necessary to smooth or leveloff, and in some cases to fill in and ram, the mold after the reservoir has been removed.

It has also been found almost impossible to withdraw the pattern from the mold by hand without to some slight degree marring the mold, which was very objectionable in molds for long cylindrical castings, such as pipeplugs, wagon-boxes, &c., rendering it necessary to. tarp the castings before .use.

"The object-"of -thy-invention is to overcome these objections, and to improve the apparatus used for forming molds in other particuars.

It consists, first, in separating the sand of the mold from the extra sand in the reservoir by means of a wire drawn between the the mold, and is provided with suitable lifting mechanism for withdrawing the pattern; third, in a hinged swinging platform adapted to be connected to and used with the molding-table; and, finally, in other details of construction hereinafter specifically set forth.

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

In the drawings, A represents the moldingtable, which may be arranged to form the mold by jarring, as shown, orby pressing, or in any other convenient way. The pattern or patterns c are attached to the pattern-plate O, which is placed on the molding-table A, and the flask B is placed over it, so that the patterns extend up into the flask. The connectinglugo of the pattern plate flts into a recess in the molding-table. The reservoir B is then placed on the flask, and the mold formed in the usual way.

D is a separating-wire, which is of small gage, so as to out easily, and is provided at each end with a handle, d, by means of which it is heldwhen usedby the workman. After the mold is formed the wire is placed back of the flask and drawn through between the flask and reservoir, as shown in Figs. 1 and 6, being'operated by the handles (1, thus severing the sand of the reservoir from that of the mold, so that the reservoir maybe slid off and leave an even surface to the mold. As the wire is held taut and is guided in its movement by the edges of the flask, it cuts the surface per fectly true with the flask, and leaves an even surface on the mold, which needs no leveling off or filling in when the reservoir is removed.

. After the separation of the sand in the reservoir and flask the reservoir is removed by placing the reservoir bottom board E against the flask B (its upper edge fitting under the guiding-strip b on the reservoir and the teeth a pressing into the flask) and sliding the reservoir onto'the board E, as shown in Fig. 2. The guiding-strip I) is even with the bottom of the reservoir, so that it will slip onto the board without spilling the sand, and the teeth 0 hold the board in place during the operation. Instead o't'thcsc teeth any suitable catch may be used on the board 1'].

When the reservoir is again needed it is W r cy".

slipped from the board E onto the flask in the same manner.

F is a hinged swinging platform, which it is found desirable to use during part of the operation of forming the mold, and which is hinged to the floor or frame of the machine in such position as to be swung entirely out of the way when not in use, as shown in Fig. 2. It is provided with hooks f, which catch on the lugsaon the molding-table A, and connect it with the table, so as to form part thereof. After the reservoir is removed the platform 1 is swung over and connected with the molding-table, as shown in Fi g. 3, and the bottom board, I), is then placed on the mold, and the mold turned over, so as to bring the pattern-plate (J on the top of the mold.

The pattern-plate C is removed from the mold by improved apparatus, which is sup ported by the flask, being either attached to it by clamps or other suitable fastenings or resting directly on the flask. G illustrates one form of this apparatus, which is attached to the flask by means of a clamping-bar, g, at one end of the apparatus.

The (pattern-removing apparatus has the upper an lower frames, 11 H, connected by the uprights h, the lower frame fitting around the flask, which passes up through it. Upon each of the uprights h are the guide-sockets i, carrying the guide-plate K within the frame, said plate being so attached as to be at right angles to the uprights and to lie horizontal when the uprights are perpendicular. The guideplatc, with its guide-sockets, is capable of vertical movement within the frame, the sockets sliding on the uprights.

In the center of the plate K is formed the opening k, through which the connecting-lug c on the pattern-plate 0 passes. Mounted on suitable supports 1, on the upper frame H, is the lifting-wheel L, provided with the handle l and a chain or cord, m, at the end of which is attached a hook or other suitable connecting device. The wheel L is mounted in such position that the chain or cord m hangs directly over the central opening, 1:, ot' the guide-plate. At one end of the apparatus, below the lower frame, II, is the clampingbar 9, which is advanced and retracted by means of the eccentric pivot-rod 9', so as to be forced against the flask when it is desired to attach the apparatus to it. The clamping-bar g is supported in position and guided in its movementby the lugs 9', attached tothe frame.

\Vhen this apparatus is used it is placed over the flask containing the pattern and mold until the guide-plate K rests upon the patternplate 0, and the pin k is passed through a hole in the connecting-lug c, which extendsup through the central opening, it, thus fastening the two plates firmly together. The clamping-bar g is then forced against the flask .bythe pivot-rod g, fastening the apparatus rigidly to the flask. The book at the end of the chain at is caught in the lug c, and the two plates are raised vertically by means of the wheel L and handle I, being guided in their movement by the sockets i on the perpendicular uprights h.

As the guide-plate K and pattern-plate 0 are parallel and are firmly connected, it is evident that the patterns will be drawn from the flask in a direct line without sagging in any way, and will leave a perfect mold in the SHIN During the operation of withdrawing the pattern the apparatus used is sup orted on, and the pressure or force by wind the pattern is lifted out is sustained by, the flask. The apparatus may be removed by loosening the clamping-bar, the pattern-plate removed therefrom, and the molding continued as before described.

In Fig. 5 is shown another form of apparatus for withdrawing the pattern, in which the parts are arranged somewhat difl'erently. Instead of hanging the guide-plate within the frame, it is placed on top of the flask between the pattern-plate and flask, as shown at K, and is provided with the guide-sockets i, which project into the flask, and into and within which guide-rods h on the pattern-plate!) lit and work. The patternscpass thron h openings in the plate K of the shape of he pat terns and project into the flask. These guide rods h on the pattern-plate serve to guide the plate when being removed in the same way as the uprights h in the apparatus heretofore described. Through the plate 0 are three or more openings, r, through which the siiilpports s of the lifting-frame H pass. The ask is placed on the plates 0 and K, and the mold formed, the reservoir removed and the flask turned over, as above descri 'Ihe liftingframe H is then placed on the plate, the supports a passing through the openings r in the pattern-plate U, and resting on the stripper or guide plate K, thechain or cord at connected with the lug c of the pattern-plate, and the pattern-plate litted by the movement of the wheel L, as above described, the patternplate being guided in its movement by the guide-rods h in the tubular guide sockets i,

and the patterns a rising through the openings in the guide stripper plate K. In this operation the plate K rests on the flask, and the pressure or force by which the pattern is lifted is sustained by the flask through the plate K. Alter the removal of the plate 0 the plate K may be lifted oil in the usual way, the extensions or socketsi guiding it in its movement.

The following are some of the advantages of my improvement: The mold is cut oil evenly when the reservoir is removed, rendering it unnecessary to fill up and rain or level oil the surface. The apparatus for removing the pattern is accurate, simple, convenient, and cheap. It can be used whether the pattern-plate is perfectly parallel with the under surface of the mold or not, as itis only essential that the guideeplate and pattern-plate are arallel, and it always draws the pattern iua irect line at right angles to the pattern-plate itself, thus.

insuring a perfect mold.

It is evident that another mechanism fer withdrawing the plate equivalent to: the wheei and chain may be adopted; also, the

pattern may be used without: the. piate and.

directly connected to th'e'gui 1g; meehanism. \Vhat I clairnas my invention, and desireto secure by Letters Patent, is-

-1. In combination with the flask and. reset- ,voir, the separating-wire D adapted to be drawn between the flask. and reservoir, substantiall y as and for tire pal-"poses: set forth.

2. In 'apparatusibr withdrawing the patand supported by the flask after the formation of the mold, the pattern-plate G, the guideplate K, provided with the guide-sockets i and suitable guides ll, substantially as and for the purposes set forth.

4. In combination with the flash, the removable lil'ting-frame, placed npon, supported by,

and provided with a clamp, g, for securing it to the flask after the formation of the mold,

and ihe'horizontal guide-plate K. mounted in thei'rame on the perpendicular uprights I1, and adapted to rest upon and .be so'seeured to the pattern-plate as to hold it parallel therewith when. the pattern-plate is removed from the. mm id], substantially as and for the purposes set; forth.

combination with the flask, the removabie lifting-frame placed upon, supported by, and provided with a clamp for securing it to 3 the flask after the formation of the mold, the f guide-plate K mounted in said frame onthe apr v guide-plate to the pattern-plate or pattern,

htsih, suitable'means for attaching the and the lifting-wheel for withdrawing the pattern, substantially as and for the purposes set forth..

6. The combination of the pattern-plate O,

provided with the log 6, the guideplate K,

pin k, lifting wheel L,and chain or cord at,

' substantially as and for the purposes set forth.

7. In apparatus for withdrawing the patterns from molds, the lifting-frame II H h, provided with the clamping-bar g and pivotrod g, substantially as and for the purposes set forth.

8. I The combination of the reservoir B, provided with the guiding-strip b, reservoir bot-- tom-board E, having the teeth 0, and the flask B, substantially as and for the purposes set forth.

9. The combination of the molding-table A and the hinged swinging platibrmh, adapted to be eonnected to the table, substantially as and for the purposes set forth.

In testimony whereof I, the said S. JARVIS ADAMS, have hereunto set my hand;

' S. JARVIS ADAMS;

Witnesses: V

F. G. KAY, Janus I. KAY.