US845668A - Mold for making metal castings. - Google Patents

Description

PATENTED FEB, 26; m

P.v 5 SWEET, JR. MOLD FOR MAKINGIMETAL"QASTINGS.

APPLICATION FILED 0GT.17, 1904. RENEWED NOV. 34, 1906.

I Wiiweoom NoL 84 5,668. PATENTED FEB. 26, 1907.

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MOLD FOR MAKHIG METAL GASTINGS. uruom mx run) 0011?, 1904. RENEWED flown. 190s.

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No. 845,668. I v PATENTED FEB. 26, 1907. P. H. SWEET, Jug MGLD FUR MAKING METAL GASTINGS. APPLICATION FILED 00?.11, 1904. RENEWED K012414908;

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' cast and also dispensing with the use of sand- 7 end employed with varying degrees of success scntially,

with a recess for receiving removable multitrmrnn stares PATENT orrron.

PARKER H. SWEET, JR, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF THREE-FOURTHS TO JOHN B: MENDENHALL, OF KANSAS CITY, MISSOURI.

MOLD'FOR MAWNG METAL CASTENGS.

Specification of Letters Patent. PatentedFeb. 26, 1907.

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' Applicationfiled Oc ber 17, 1904. Renewed November 24, 1906. Serial-No. 344,982. To all whom it may concern: 7

Be it known thatl, PARKER H. SWEET, Jr., a citizen of the United States, residing at i Washington, in the District of Columbia, have invented new and useful Improvements in Molds for Making Metal Castings, of which the following is a s ecification.

My invention re ates toimprovements in inolds for making metal castings; and it has for its object to provide a metal mold which can be produced at the minimum of cost and I wherein metal castings embodying difl'erentl shapes and forms and of varying sizes may I he successfully produced in the same mold,

7 My invention further consists in the novel I ment of parts, as will be hereinafter fully escribed, illustrated in the drawings, and pointed out in the claims.

The invention will be more fully understood by reference to the accompanying drawings, wherein the same parts are indicated by like letters throughout the several views, and in which Figure 1 is a perspective view of the mold in a closed position. Fig. 2 is a horizontal cross-section taken on the line a a: of Fig. 1. Fig. 3 is a vertical ;2 1 of Fig. 1, showing the empty recesses in the two sections of the mold. Fig. 4 is a similar view with the various'members or parts in position within the recesses of'the mold.

thus obviating the necessity of employing a separate mold for each diiierent article to be molding and its attendant expense. Heretoforc it has been the general custom to use sand for making molds for the casting of metals, and the fact that a new mold must be made by skilled workmen for every casting produced has led to attempts toiprovide a metal mold which might be used continu-' ously and also cheapen the cost oi making castings, and while such molds have been mold with the nuiliilorm face-blocks and intermediate arch or crown in position in the recess of the same. Fig. 6 is an inside view of the other half of the mold with a patternblock in position within its recess. Fig. 7 is an inside view of one half of the mold, showing a modification of the'space-blocks at the lower end of the recess. Fig. 8 is an inside view of the other half of the mold with the patternblock provided with space-blocks at the lower end of the recess. Fig. 9is a detail perspective view of one of the multiforni face-blocks for forming one of the smaller size of castings, and Fig. 10 a similar View of a multiform face-block for forming the larger size of casting.

In this application I have shown a mold and its several parts or members arranged for casting one of the many diilerent sizes of journal-bearings for car-axle boxes, commonly known as car-brasscs. and in order that the invention may be fully understood it is deemed necessary to mention that such journal-bearings are cast in several diflerent sizcsthat'is to say, from three and threethe main objections to the use of the same lies in the fact that their construction is necessarily expensive, in that the mold-chamber has to be prepared and'iinished by skilled high-priced labor and the completed mold liable at any time to split or crack while in use, owing to the rapid expansion and contraction of the same, thus destroying its usefulness in producing perfect castings.

- It is the object of my present invention to obviate these disadvantages and to provide a metal mold which can be produced at a low cost without skilled labor, which will not split or crack while in use, and whereby smooth and perfect castings can he produced in large quantities at a greatly reduced cost.

To these ends my invention consists, es of a separable or two-part mold, the inner contacting faces of whichrare each length, and soon up to five and one-half provided with gate and vent openings and inches in width by ten inches in length-and the recesses in the two sections of the body of the mold are therefore of a size to readily admit the multil orm iacc-l'ilocks, an intermediate arch or crown, and a pattern-block of 'the largest size to sized casting.

form face-blocks, an intervening removable arch or crown, and s nattern bh ick which are to form the inner walls of themold-chamber and wherein the molten metal'lis'pourcd to produce the desired shape and size of casting.

I details of construction and general arran section taken on the line Fig. 5 is an inside view of one half of the' produce the largestquarter inches in width by seven inches in As shown in the drawings, the main body of the mold is made in two parts or sections A A, which are hinged together on one side,

recess 3, which register with each other when themold is in a closed position. The mold is provided with an ordinary gate C, formed in the two parts of the mold directly above and to the center of the mold-chamber, while a suitable vent-opening 0', also formed in the two partsof the mold, is provided immediately adjacent to said gate C, as shown.

In arranging the mold for casting, the two multiform face-blocks D D, having rightangled projections D of the proper width an length, according to the size of castings -to be produced, are inserted in the recess B of the section A, one on each side of a centrally-arranged arch or crown E, also fitting within the said recess, as fully shown in Figs.

2 and 5 of the drawings. Within the recess B of the opposite section A of the mold is arranged the proper size of pattern-block F, which is to form the crown of the journalbearing, and when the two sections are closed together and securely fastened the various parts or members contained within the said recesses unite to form the inner wallsof the mold-chamber into which the molten metal is to be poured to produce the desired size of' casting. Y

As shown in the drawings, the mold is arranged for casting, and in this instance representing a journal-bearing three and threequarter inchesby seven inches in size, in which case the multit 'orm face-blocks with the largest-sized right-angled projections l) is employed to produce that size of casting, said right-angled projections extendii'lg, in reverse. directions, so as to meet in the center of the recess B and fill the vacant space therein. These right-angled projections increase in sizewith the smaller sizes of the multiform face-blocks and decrease in size with the larger sizes of said face-blocks, so as to always fill the vacant space in the recess, while the various-sized pattern-blocks F in the opposite recessof the section A have an extension F at their base corresponding to the projection D upon the face-block in the" opposite section, as fully shown in Fig. 6. A modification is shown in Figs. 7 and 8, wherein a series of space-blocks G are designedto be substituted for the right-angled projections D u on the lower ends of the mu tiform face-b ocks D and the lower ends if deemed preferable, a sufiieient number of said space-blocks being introduced into the recesses or taken therefrom, according to the size of the casting to be produced. The various widths of the several castings in each instance are provided for by inserting the pro er width of face-blocksand intervening are 1 or crown in the recess of one section, and the corres )onding size of pattern-block in the recess oi the opposite section, according to the size of the casting that is to be formed in the mold.

The arch or crown E is made in several sizes, aecordingto the size of the journalbearing to be cast, and each areh or crown is provided with a rod or lug E, which projeetsinto and through an opening in the wall of the section A of the mold; as fully shown in Figs. 2 and 3.

The free end of the ring-bolt c, which la ks the two sections AA of the mold together, is provided with a handle. A for the easy manipulation of the said bolt into and out of engagement wi slotted lug 0, while the lower end of an angular IUrl sAl,.,l),iX9tc(l within a slotted lug on the back of the seetiib ii fi, is also provided with a similar handle A, whereby the free end of said angular rod may be brought into contact with the outer projecting end ofthe rod or lug E on the arch or crown E to eject the same and the hardened casting from the mold at the proper time. These handles also serve for the ready manipulation of the molduluring the operation of casting.

Each of tl e recesses B are provided with one or more' thin plates B, which snugly lit 'againstthe. 'back wall thereofl the object of which is su l'h that when one or more of the castings are to be made thicker or with a 165 greater depth these plates B may be removed according to the depth of theen iultiform face-blocks and other members to produce the desired thickness of casting. My

invention is equally applicable for casting no-- articles otvarious shapes and sizes, it being only necessary to insert the proper patternblocks or lornis wlthln the recesses of the mold to produce the desired casting, and

such application is hereby contemplated by 115 me without departing from the spirit of my invention. 7

My improved mold can be produced at a very low .cost, the two parts or sections A A,

I having the recesses B, gate C, and vent C, 12b

being preferably formed of cast-iron, while the multiform face-blocks D D, arch or erowvn E, and pattern-block F may be cast r01 some finer grade of metal to present smooth and even surfaces, so as to be capable r z 5 of readily fitting'the recesses of the mold, thus d1spensing with the usual labor and expense of forming and finishing the mold- .chamber.

of the extension F of the pattern-blocks F, Havingthus described my invention. what 130 I claim as new, and desireto secure by Let-' ters Patent, is

1. A metal mold for forming castings, comprising two parts or sections provided with central recesses having gate and vent openings formed integral therewith, and contained partially in one of said sections and partially in the-opposite section, and one of a series of interchangeable pattern-blocks and space-blocks adapted to fit within said central recesses, substantially as described.

2. A metal mold for forming castings, comprising two parts or sections, each section being provided with gate and vent openings, and with a central recess provided with one or more thin plates fitting the rear walls thereof, and adapted to receive removable pa".- tern-blocks of varying sizes and an arch or crown to produce the desired size and thickness of casting, substantially as described.

3. In a metal mold 'for forming castings, comprising two parts or sections forming an inclosing case, each section being provided wit gate and vent openings, and with a central recess provided with thin plates fitting the rear a alls thereof, the combination therewith of removable face-blocks and a cen-* trally-located removable arch or crown fitting within one recess, and a removable pattern-block fitting the opposite recess substantially as described.

4'. A metal mold for forming castings, comprising two parts or sections, each section having gate and vent openings, and a central recess provided with interchangeable patopenings, and a central recess to receive interchangeable pattern-blocl' s or forms and an arch or crown to produce the desired shape and size of casting, the combination therewith of one or more. thin plates B increase or diminish the thickness of the cast ings, substantially as described.

6. In a mold formed of two sections, each section being provided with gate and vent openings and a central recess, the combination therewith of interchangeable face blocks provided with right-angled spacefilling projections, an arch or crown centrally located between said face-blocks, in one of said recesses, and a pattern-block or member located in the opposite recess of said sections, substantially as described.

7. In a mold of the class described, a faceblock provided at its one end with a right "angled projection, in combination with the inclosing walls of the mold, substant al y as described.

In testimony whereof I affix my signature in presence of two subscribing witnesses.

PARKER H. SWEET, JR.

Witnesses:

(J. W. FOWLER,

HOWELL BARTLE.

adapted to fit the rear wall of each recess to'

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