US508590A - Sand mold - Google Patents

Description

(No Model.)

s. J. ADAMS.

SAND MULD. No. 508,590. PatentedNov. 14, 189s.

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UNITED STATES.I

PATENT Querce.

STEPHEN JARVIS ADAMS, OF PITTSBURG, PENNSYLVANIA.

SAND NIOLD.

SPECIFICATION forming part lof Letters Patent No. 508,590, dated` November 14, 189,3. Application iiledDecemher 3, i892. Serial No. 453.907. (No model.)

To all whom it may concern:

Beit known that I, STEPHEN J ARvIs ADAMS, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented, a new and useful Improvement in Sand Molds; and I do hereby declare the following to be arfull, clear, and exact description thereof.

Myinvcntion relates to partible molds, that is, molds formed of cope and drag, or more parts, and it is especially, though not exclusively, applicable for casting tubular and like articles, such as wagonboxes, pipe welding balls or bells, and the like.

The special object of the invention is to provide a mold in which practically all space within the main flask is filled with mold cavities and by which a large number of castings can be made in a comparatively small space, this having the advantages of saving foundry space, increasing the output by increasing the number of `mold cavities in one ask, and reducing the labor of pouring, as a large number of molds can be poured at a single time through a single pouring gate, this greatly reducing the'labor of pouringthe molds. One of the principal difficulties with arranging a large number of mold cavities in asin gie iask has been in arranging the runners to the different cavities, this requiring space in the mold and-preventing the placing of the cavities as close as was desirable.

In molds constructed inv accordance -with the present invention, the mold cavities are contained within the cope and drag, and for tubular castings are arranged to extend upwardly into theaskfronl below, the drag being employed below-the cope, and tthe cores whenused being supported between the cope and the drag, and the pouring gate being carried through both cope and drag,- the runners leading from said pouring gate along the under surface of the drag and communicating with gates or leaders extending through the drag to the mold cavities, while the completed mold is placed upon a prepared mold bed which closes the pouring gates and runners so that the metal can pass directly through the pouring gate and thence to the different runners along the under surface of the drag, and thence rise through the leaders directly into the mold cavities, so that the metal is' fed in an upward direction to the same, and the placing of the mold cavities close to each other is in no wayinterfered with bythe runners.

To enable others skilled in the art to make and use my invention,.I will describe the same more fully, referring to the accompanying drawings, in which- Figure l is a sectional view of the mold illustrating my invention. Figs. 2 and 3 are like views of other forms of the same, while Fig. 4 is a top view and Fig. 5 is a bottom view of the drag.

Like letters of reference indicate like parts in'each of the views.

My invention is illustrated in three different ways; in Fig. l the cores being entirely centered within the cope, in Fig. 2 the cores being formed as part of the drag and extending up into the cope, and in Fig. 3 the cores being centered in seats formed in both. the cope and the drag. In Fig. 1 the flask a, is compacted in the usual way and has the mold cavities b, for forming Wagon boxes, having at the upper ends the inner core seats c and at the lower ends the outer core seats d in which core seats the cores e are seated. In order to feed the metal to the mold cavities through the large ends of the cores, I prefer to form the runner extending between the mold and core-head, as at e. The drag g is a shallow body of sand supported Within the drag flask hand having extending up through the same a series of vertical leaders or feeding gates i, which communicate with the runners e and so feed the metal from the lower surface of the drag into the mold cavities. Formed on the under surface of the drag are different runners k which lead from the vertical pouring gate Z to said leaders t', so that the metal can pass down through the pouring gate Z which extends through both the cope and the drag, the metal striking the mold bed m which is preferably made of sand and on which the completed mold rests, and which bed closes the said runners and vertical pouring gate, the metal then passing from the vertical pouring gate through the runners, through the leaders, and into the mold cavities b.

In Fig. 2 the flask a has the mold cavities b formed therein which are provided at the upper ends with the seats e for theinner ends of the cores p which are formed as parts of the drag g,the mold shown being for forming pipe Welding bells. The drag g is the same shallow bed as shown iu Fig. l, except that the said cores p are formed with the drag and the upper surface of the drag closes the lower ends of the mold cavities b. The drag has the leaders fi extending up through the same, said leaders communicating with the runners k formed on the under surface of the drag, while the vertical pouring gate Z extends through both cope and drag, the completed mold being placed on the mold bed fm', which serves to close the said runners and vertical pouring gate. In said mold the metal passes down through the vertical pouring gate Z onto the mold bed, and thence through said runners la', through the leaders i', and rises within the mold cavities.

In Fig. 3 practically the same form of cope as shown in Fig. 2 is employed, the ask a2 having the mold cavities b2 for forming pipe welding balls provided at the upper end with the seats c2 for the inner ends of the cores. The drag g2 has formed in the upper surface seats fr to receive the lower or outer ends of the cores s. It also has the leaders i? passing entirely through the same and communicatingwith the mold cavities band the runners k2 along the under surface of the drag but in this case actually formed in the mold bed m2, and the pouring gate Z2 passes through both cope and drag and communicates with said runners. In pouring the mold the metal passes down through said vertical pouring gate Z2 and thence through the ruuners 7a2 and leaders t2 into the mold cavities.

It will be seen from the above description that in all cases the leaders which feed the metal into the mold cavities form communicatlons between said mold cavities and runners along the under surface of the drag, so that the runners distributing the metal from the vertical pouring gate can pass in any direction desired without reference to the openings of the mold cavities. The result of such arrangement is that the mold cavities can be placed close to each other, indeed, as close as practicable to make the molds of sufficient strength to support the metal, and that runners of sufficient size to feed the metal freely to the several mold cavities can be employed, while, at the same time, the metal is fed to the ends of the mold cavities where it will not mar the castings formed. By such construction I am enabled to form a much larger number of mold cavities in the same size of iiask, and no more labor is required to form such larger number of mold cavities. The

only possible extra expense is in the formation of the drags, though such drags are necessary in the same classes of molds, such as those shown in Figs. 2 and l3, and the principal labor in filling the molds, namely, in starting and stopping the stream of metal entering the pouring gate, is reduced, While the floor space necessary for the supporting of the molds isA also reduced, these items being important in the practical making of such castings. In some cases the runners forming communication between the pouring gate and the mold cavities may be made in the sand bed, as illustrated in Fig. 3 and covered by Letters Patent granted to mo August 5, 1890, No. 433,588, and such is, of course, included within the invention.

While I have described my invention in connection with tubular molds,it is to be understood that it includes partible molds for forming solid castings, and it possesses substantially the' same advantages for such molds, and provides also for the feeding of the metal at any desired point or points in the bases of the molds, a great advantage in making certain delicate castings.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A partible sand mold formed of cope and drag and containing a series of mold cavities, the drag havingaseries of vertical leaders extending through from the mold cavities to the bottom ot' the drag and communicating with one or more runners, alongthe under surface thereof, and apourng gate extendingthrough the cope and drag and communicating with said runners, in combination with a mold bed supporting the mold and closing the pouring gate and runners, substantially as and for the purposes set forth.

2. A mold for tubular articles having a main mold provided with a series of mold cavities extending up from below into the same, a drag which with the main mold supports the cores, said drag having a series of leaders extending through the same and communicating with the mold cavites,`and one or more runners along the under surface thereof, a pouring gate extending through both cope and drag, and communicating with said runners, and a mold bed supporting the mold and closing the pouring gate and runners, substantially as and for the purposes set forth.

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

STEPHEN JARVIS ADAMS.

Witnesses:

J. N. COOKE, RoBT. D. TOTTEN.

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