US967616A

US967616A - Method of drying molds.

Info

Publication number: US967616A
Application number: US531195A
Authority: US
Inventors: James C Davis
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1907-09-09
Filing date: 1909-12-03
Publication date: 1910-08-16
Anticipated expiration: 1927-08-16

Description

J. G. DAVIS.

METHOD OF DRYING MOLDS.

APPLICATION FILED DEO.3,1909.

Patented Aug. 16, 1910.

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Jlhhllfilfi "U. DAVIS, UIF HINSDALE, ILLINOIS, ASSIGNOR T AMERICAN STEEL FOUNDRLEQ, @F NEW. YORK, N. 1., A. CORPORATION OF NEW JERSEY.

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Specification of letters Patent.

Patented Aug. is, 19m.

llllllfilfihl application tiled September 9,19%, Serial No. 391,961.. Divided and this application filed December ll. 1909, Serial No. 531,195.

To all whom it may concern:

Be it lmown that l, James C. DAVIS, a citizen ot the United States, residing at H1nsdale, in the county of Dupage and State of l /ly invention relates to improvements in the methods used for heating and drying molds employed tor the casting and founding of metal bodies or parts. The usual and ordinary method or process of drying molds is to hit the mold on to a car and run the car and mold into a drying oven to which heat is applied by colic, coal, gas, or other suitable tool. It has been found, however, that molds transported and treated in this manner are likely to be shaken up and injured by their handling, and although the mold is dried hard on its surface its interior is lilrely to be left moist. y

it is the object of my invention to provide a process for heating and drying molds without transporting them and making the drying of the mold complete throughout the entire body of sand. By my lmproved method the heat is supplied to the interior ot the sand of the mold by means of steam or other suitable treating element circulating through or ted to pipes embedded in the sand. Preferably the cope and drag each has a pipe coil or lengths of pipe in its sand, the ends of the pipe being joined when the cope is superposed on the drag, whereby the steam admitted to thepipe of one passes or circulates to the other. course, the supply and circulation of steam and the pipes of the two parts of the mold may be quite distinct and separate.

in carryingout my improved method the drying element, preferably steam, is brought to the mold insteadot the latter being conveyed or carried to the drying chamber, as is usually done, and in carrying out my method the heat is applied to the inside of the body of sand, and consequently the mold is sure to be thoroughly dried throughout and not shin dried.

in the accompanying drawing, forming a part of this specification, I have illustrated a simple and convenient apparatus for carrying on this process, and inthis drawingl igure 1 is a plan view of the cope of the It desired, of

is a plan view of the drag;

Fig. 3 is a side elevation of the parts of the mold assembled; and Fig. 4 is an elevation of the right-hand end of the assembled mol shown in Fig. 3.

Referring now to this mold suitable for carrying on my improved process, it will be noticed that the cope is of the usual and mold; Fi 2 ordinary construction, and has embedded in its sand the lengths of pipe 11, 12, 13, 14-, and 15, united byelbows of the ordinary form. The pipe '10 extends outwardly through one end of the cope, and the protruding portion is equipped with a steam inlet valve 16. The pipe 15 extends through the other end of the co e and is connected by an elbow with a short length of pipe 17 having at its end one element 18 of a union which provides means for disengageably connecting the pipe 17 with a simllar ipe of the drag. It will be noticed from Fig. 1 that the pipes within the sand of the cope prov de three lengths substantially the full ongitudinal dimension of the cope, whereby a complete and thorough heating of its sand may be secured. v

The drag 19 has embedded in its sand a pipe 20 which protrudes through the end of the drag and is connected by an elbow with a short pipe 21 on the free end of which is the other member 22 of the union 18-22. The other end of pipe 20, by-means of a cross-pipe 23, connects with another lon i-

Y pipes

20, 24, 26, and 28 a thorough and complete drying of the sand of the drag may be readily efiected.

After the mold cavity 30 has been formed in the sand, the co e withits pipes is placed upon the drag and fastened thereto 1n any approved manner, as is indicated in Fig. 3.

Pipes

17 and 21 are disengageably connected by the union 1822, whereby the pipes of the cope and drag are joined to form a continuous'conduit or tube for the passage of steam through or admission of steam to the parts of the assembled mold. Steam or other suitable heating element is supplied to the pipes by the opening of the valve 16, and may be allowed to exhaust through the valve 29 or the water of condensation permitted to dri'p through such latter valve. Owing to the fact that the steam pipes are buried within the body of sand formin the mold, it is thoroughly heated and dried throughout, no skin drying alone being eifected. Inasmuch as the heating element such as steam may be readily conducted to the mold in any position or location, it is unnecessary to transport the mold to a drying chamber, thereby risking injury to the carefully fashioned mold. As will be obvious, a disconnection between the

pipes

17 and 21 may be readily efiected, whereupon the cope can be easily lifted from the drag.

To those skilled in the art it will be apparent that the precise number of pipes or their location or disposition within the sand is quite immaterial, and that the structure shown in the drawing and described above is merely set forth as one way in which this method can be advantageously carried out. The disposition of the steam pipes within the sand of the mold, as will be readily understood, may be varied to correspond with different shapes of mold cavities, but in any case the pipes would be buried within the sand and e ect the drying operation as described above, that is, from the interior of the sand outwardly.

I have deemed it unnecessary to illustrate the steam generator or other source of supply of the heating element, but it is to be understood that the pipe 11 is intended to be connected by any suitable means with a boiler generating steam or other source of supply of a suitable heating element.

This a plication is a division of m former app cation Serial No. 391,961, filed September 9, 1907.

I claim:

1. The method of drying a mold which consists in passing a heating inedium through the material of the mold between the mold cavity and the exterior of the mold and maintaining the heating medium out of direct contact with the material of the mold, substantially as described.

2. The method of drying a mold which consists in passing steam through the material of the mold between the mold cavity and the exterior of the mold and maintaining the steam out of direct contact with the material of the mold, substantially as described.

3. The method which consists in drying a mold by radiation from a heating medium located in the body of the mold exterior of the mold cavity and out of direct contact with the material of the mold, substantially as described.

4. The herein described method of drying molds which consists in circulating a heating medium through the material of the mold between the mold cavity and the exterior of the mold and out of direct contact with the material of the mold, substantially as described.

JAMES C. DAVIS. Witnesses:

W. H. CAMERON, A. G. Frscrmu.