US1325972A

US1325972A - anthony

Info

Publication number: US1325972A
Authority: US
Publication date: 1919-12-23
Anticipated expiration: 1936-12-23

Description

T. P. ANTHONY.

MOLD DRYING PROCESS.

APPLICATION FILED NOV. 2. 191s.

{ 1 25,972. Patented Dec. 23, 191 9.

THOMAS P. ANTHONY, OF EDGEWATER PARK, NEW J ERSEY. ASSIGNOR TO UNITED I STATES CAST IRON PIPE & FOUNDRY COMPANY, OF BURLINGTON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

MOLD-DRYING PROCESS.

Application filed November 2, 1918.

To all whom it may concern:

Be it known that I, THOMAS. P. ANTHONY, a citizen of the United States of America, and resident of Edgewater Park, in the county of Burlington and State of New Jersey, have invented a certain new and useful Improvement in Mold-Drying Processes, of-which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to the drying of pipe molds, and has for its object to provide a rapid and eflicient method of drying the pipe molds, which is especially well adapted for drying the molds in approximately the position they are to occupy during the casting operation.

Essentially my invention consists in placing the mold flask, with its lining of undried mold, in a vertical position, closing thetop of the mold and introducing burning gases into the bottom of the mold at some distance from its sides, causing the burning gases to pass upward through the central portion of the mold to its top, then downward along the sides of the mold to its bottom where ample space is left for its lateral escape.

By preference, the mold flask is arranged with its bell end downward and above and at some distance from, but concentric with, the mold members which coact with the bell in the assembled mold, so that the hot gases will escape from the mold flask between its bell end and the said coaeting mold members, with the result that all the parts of the mold are simultaneously dried.

Reference being now had to the drawings, which illustrate my invention, and certain convenient mechanical appliances for its practice, and in which Figure 1 is a vertical sectional elevation showing the mold flask and coacting mold members together with the supporting mechanism and the appliances for introducing air and gas.

Fig. 2 is a similar section to Fig. 1, showing the mold members assembled, the core in place, the casting completed, and the appliances in the position they occupy during the casting operation, and

Fig. 3 is a plan view of the base of the structure shown in Figs. 1 and 2.

A indicates the mold flask having a bell Specification of Letters Patent.

. mouth, as indicated at A.

Patented Dec. 23, 1919.

Serial No. 260,897.

B is the mold supported in the flask and having its bell mouth B. C is the bottom plate of the mold having, as shown, a seat C for the annular socket iron and a recess C to contain molding sand as indicated at D. E is the annular socket iron, the outer face of which supports the molding sand F, which coacts with the bell end B of the sand lining B to make up the mold for the bell. G represents one of several separating blocks, which, during the drying of the mold, rest upon the bottom plate C and support the mold flask at some distance above it. By preference I form these blocks with perforations as indicated at G, so that gases can pass freely through them as well as between them. H H represent what may be called the legs of the stool or base. By preference I use four or six symmetrically disposed and continued upward in the form of supporting ribs H, preferably formed with a series of concentric annular notches, as indicated at h, to fit different sizes of bottom plates C. The ribs H and legs H are connected together by web plates H which slope gradually outward and upon which a layer of sand, held in place by projections indicated at I, is advantageously placed as shown in Fig. 1, as a protection against runouts. H is an annular chamber supported, as shown, by the ribs H and fed with gas through a passage H and gas pipe J. H indicates an annularly arranged system of gas burners extending upward from the chamber H. K indicates the support for an annular deflector indicated at K. The support is preferably cylindrical in form and made so as to fit against a cylindrical inner face at the end of the chamber H It is provided, as shown, with depending legs K which, during the drying oporation rest upon blocks L, as shown in Fig. 1, said blocks being removed and the cylinder and supported deflector brought to the position shown in Fig. 2 during the casting operation. M is a cover plate which closes the upper end of the mold during the drying operation. N, Fig. 2, represents the core bar having trunnions as indicated at N and N For the drying operation the parts are assembled as shown in Fig. 1. Gas is fed to the annular system of burners and directed upward against the baffie K, which forces it to move outward into the entering air current which passes freely through the space between the bottom plate C and the web H The ignited air and gas pass upward through the central portion of the mold, as indicated at O, turning outward at the top of the mold against the cover plate M, as indicated at O, and then pass downward as indicated at O in contact with the molding sand to be dried, finally passing between the bell mouth B and the mold members F and D and outward between and through the spacing blocks G.

I have found that a good and eflicient circulation of the burning gases is effected in this way, and that both the radiant and sensible heat of the gases is effectually used forthe drying of the molds.

In Fig. 2 I have found the parts in the position they occupy during the casting operation, and it will be observed that the only changes in position of the parts involved is the removal of the spacing blocks G, permitting the flask to rest upon the bottom plate C, and the removal of the supporting blocks L, which permits the cylinder K and deflector K to assume the position as shown. This will indicate an advantageous feature incident to the practice of my new method of drying molds in that it enables them to be dried approximately in the positions which they occupy during the casting operation.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The method of drying long open ended pipe molds consisting in placing the mold in a vertical position, covering the top of the mold to prevent escape of gases therethrough, introducing burning gases at the bottom of the mold at some distance from the sides thereof and providing an outlet passage for the gases in free communication with the outer periphery of the lower end of the mold, whereby said burning gases are caused to pass upward through the central part to the top of the mold and downward along the sides of the mold to escape at the bottom thereof.

2. The method of drying long open ended pipe molds consisting in supporting the mold in a vertical position with its lower end in free lateral communication with the atmosphere, covering the top of the mold to prevent escape of gases therethrough, introducing burning gases at the bottom of the mold at some distance from the sides thereof whereby said burning gases are caused to pass upward through the central part'to the top of the mold and downward along the sides of the mold to escape laterally at the bottom thereof.

3. The method of drying pipe molds, which consists in supporting the mold flask vertically above and with its bell end at some distance from and concentric with the mold members which coact with said bell end in the assembled mold, covering the top of the mold, introducing burning gases at the bottom of the mold flask and at a distance from its inner sides, whereby said burning gases are caused to pass upward to the top of the mold, downward along its inner sides, and out between thebell end of the flask and the said other mold members.

THOMAS P. ANTHONY.