US1066835A - Mold-table. - Google Patents

Description

E. H. MUMFORD. MOLD TABLE.

APPLICATION FILED AUG. 1B, 1908.

1,066,835. Patented July 8, 1913 EDGAR H. MUMFORD, ,0]? PHILADELPHIA, PENNSYLVANIA.

MOLD-TABLE.

Specification of Letters Patent.

PatentedJulyS, 1913.

Application filedlAug'ust 18, 1908. Serial No. 449,018.

1 '0 all, whom it may concern:

Be it known that I, EDGAR H. MUMFORD, -a citizen of the United States, residing at Philadelphia, in the State of Pennsylvania, 3 have invented certain new and useful Im provments in Mold-Tables, of which the following is a specification.

1 This invention has reference to the provision of an improved form of apparatus for supporting molds in a foundry, andcarrying them from one point to another at which they are poured, and then transferring them to still another point at which they are taken off the supportand the-castings taken out.

The first of the objects of this present invention is the.provision of a device Ofthe character specified, which will very much economizc'in the space necessary for handling molds in a foundry, and which will also handle said molds in a more satisfactory and economical manner. A further object of the invention is the provision of mechanism of this general type in which the molds after being poured are gradually ele vated at a point at which they are above the sand floor, which latter is located above the mold floor or foundry floor, and thusa convenient means is provided for separating the sand and castings after they have cooled, and at an elevation from which the sand can be "rcconveyed through p roper chutes and hoppers, to the molding machineny employed, and the castings also transferred tothe machining department, by the action ,of gravity.

\Vith respect to the saving in space above mentioned a further object of this invention is to eliminate the loss of space incident to the room required for movement cf the transfer devices when traveling in a horizontal plane.

2.To eliminate the loss of space incident to the employment of a return loop which is necessarily included in a horizontally moving mechanism and which neccssarily occupies a large amount of room.

' 3.--To eliminate in a large measure such multiplicity of parts in one connected or 0 continuous mechanism as produce liability to frequent failures.

4.To secure greater certainty and reliability in operation and the avoidance of complete stoppages incident to the failure invonc place of a. mechanism which is continuous throughout the shop.

i 5.To avoid the-necessity of operating a transfer mechanism adapted; to.;t he requirenents. ofanentire foundry output whenas .in slack times only a. small portion there'of may be required.

The aboveas well as such othemobjects as may hereinafter appear, :1 .attain; gby means drawing, whorein- -F.igure 11s a side elevation, somewhat diagrammatic, indicating .an apparatuscmbodyingmy improvement, and Figure Zjsa' front vertical vaewof the same.

In carrying out ,my invention y I airange an endless conveyer orcarrier. composed of.

the cables or chains 3carr-ying shelves 4, the

a motor or other suitable driving .device 9 which in this instance is mounted near-the head of the frame 7, upon the bracket supports 10 so as to be entire ly removed and out of the way of the operatorsupon the foundry floor below. Located substantially on the same level as that of the brackets. 10 I may arrange a sand floor 11 from which there are provided suitable hoppers 12 and down spouts or conductors 13 through which the sand may be returned to the. pr0per place in proximity to the molding mechanism 14, which may be of any preferred yp -In the foundry floor 15 I preferably proof ,a construction which I have illustrated in preferred .form in the-accompanying said endless carrier beingadapted .to travel The power vide a depression indicated at 16, for clea-rance for the mold shelves, the direction of motion being that indicated by the arrow shown at 17. l

At a point some distance above the floor 15 I arrange suitable shafts 18 carrying a couple of wheels 1!) by means of which the court-yer or carrier with the shelves at-' operation. The pouring is to be done by a suitable ladle indicated at 21, and the pr'ess-' 'ing inward of the carrier exposes the up- The molds are first formed on suitable molding machinery indicated generally at 14, and, after being completed and the cores set, are placed upon the depending shelves indicated on the left side in Figure 1, upon which they ride downward, around and upward into the position indicated at 20 where the pouring may be accomplished, a portion of the carrier being arranged so as to permit such pouring. After the mold is poured, it continues to travel upward slowly step by step, or continuously as circumstances re uire, and the casting gradually hardens an cools, until the mold when it reaches the top of the support is in condition for being taken out to effect a separation of the sand andcasting.

In order to avoid slipping, the conveyer is made of sprocket chain which engages with sprocket wheels at the top and bottom, or it may be constructed of cables with suitable projections or buttons thereon engaging corresponding notches or depressions in the wheels 5 and 6.

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent, is the following:

1. In molding apparatus, an endless substantially upright carrier provided with a series of mold supports, a mold floor, a

sand floor thercabove' at the downwardly moving side of the carrier, means whereby the sand may be transferred, from the sand floor to the mold floor and pouring means at the upwardly moving side of the carrier.

2. In molding apparatus, an'endless substantially vertical conveyor provided with a series of mold supports, a molding inachin e adjacent the lower end of the conveyer at the downwardly movin side thereof, sand receiving means above t e molding machine, means whereby the sand may be trans ferred from the receiving means to the molding machine, and pouring means adjacent the line of movement of the conveyer.

3. In molding apparatus, a luralit-y of operating floors one above anot er, a mold conveyor for elevating the molds from one floor to another, means for forming the molds on a lower floor, means for pouring the molds on a lower floor, and means for transferring the sand from the molds shaken out on the upper floor to the floor on which the molds are formed and adjacent to the forming means.

4. In molding apparatus, a plurality of operating floors one above another, an endless conveyer for elevating the molds from one floor to another, means on one side of the conveyer on a lower floor for forming the molds, means on a lower fioor on the f opposite side of the conveyer for pouring the molds, and me; s for transferringthe sand shaken out of he molds 0mm upper floor to the floor on which the molds are formed, and adjacent to the forming means,

In testimony whereof I have hereunto signed my name in the presence otthetwo subscribed witnesses.

EDGAR H." MUMFORD.

Witnesses: r E. M.HUGG1NS, C. S. LovELL.

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