US701105A - Flask for sand molds. - Google Patents

Description

(Patented May 27, |902.

n. c. ToLMlE. FLASK F08 SAND MOLDS.

(Application led June 2B, 1991.)

2 Sheets-Sheet I.

(No Model.)

C'. Tof

wi Nomi muws co. Marquina. Msnmumn. u. c

- Patented May 27. |902. R. C. TOLMIE.

FLASK FUR SAND MOLDS.

(Application led June 26, 1901.]

2 Sheets-Sheet '2,

(No Model.)

Frx

ms Param co, Puo-rauwe.. wAsmvm UNTTED STATES PATENT OFFICE.

ROBERT O. TOLMIE, OF WILMINGTON, DELAWARE, ASSIGNOR TO LOBDELL CAR WHEEL COMPANY, OF WILMINGTON, DELAVARE, A CORPORATION OF DELAVARE.

FLAsK FoR SAND MoLos.

sPEoIFIcATroN forming part of Letters Patent No. 701,105, dated, May 2v, 1902.

Application filed June 26. 1901.

To all whom', it mrtg] concer-n:

Be it known that I, ROBERT C. TOLMIE, a citizen of the United States, and a resident of Wilmington, Delaware, have, invented certain Improvements in Flasks for Sand Molds,

of which the following is a specification.'

My invention relates to certain improvements in flasks used in the process of molding, and particularly the fiask forming the 1o cope-section of the mold. Y

The object of my invention is to so construct the fiask that the sand can be loosely placed therein and compressed to the proper densityr in any suitable molding-press without being 5 previously rammed, as in the common method of making castings.

In the accompanying drawings, Figure lis a plan view of a flask, illustrating my invention. Fig.A 2 is a side View of the iiask shown zo in Fig. l. Fig. 3 is a transverse sectional View on the line 3 3, Fig. l, showing the' parts in position when the sand is first placed in the mold; and Fig. 4 is a view similar to Fig. 3, showing the flask and the sand after the z5 sand has been compressed to the proper density.

I have illustrated my inventionin connection with the cope-section of a fiask for molding car-Wheels, and while my invention is par:

3o ticularly adapted for this purpose I do not Wish to limit myself 4to a car-wheel flask, as it will be understood that my invention can be used in connection with any sand mold.

A is the pattern, having a face conforming to the shape of one side of the car-wheel to be cast. t

B is the chill-ring, mounted on the base A in any suitable manner, and D is the copesection of the fiask. This cope-section is 4o made in two parts E and F, the part E being in the form of a ring and secured to the chillring B by bolts b or other suitable fastenings in the presentinstance; but the ring may form part of the chill-ring, if desired. The part F has a flange f, which fits within the fixed part E, forming a telescopic flask. On the flange f are lugs j", arranged to travel in grooves c in the section E, and a stop e' is secured to the upper edge of the section E. This stop eX- tends over the slot and prevents the with- Serial No. 66,136. (No model.)

'section F in its depressed position. In the present instance I have shownthree of these latches; but any number maybe used without departing from the main feature of my invention. .The movable section F of the flask is open at the top and has aseries of ribs or partitions t, which in the present instance connect with an annular rib or partition i', forming a number of compartments in which the sand can be placed.

G is a compressible pattern to form'the gate or pouring opening for the mold. This pattern is made in two parts g g', one telescoping with the other, and mounted between a fixed portion g2 of the part g and the bottom of the part g is a spring g3, tending to eX- pand the pattern. `Any number of these pat-- terns can be used, according to the size of the casting. In the present instanceI have shown three arranged around the center of the mold, so that one end of thispattern rests against the face of the pattern A, while the other end rests against the press-plate of the moldingpress,and so that when the mold is compressed the spring will yield, contracting the 'pattern G. As soon as the press-plate is withdrawn, however, the portion g of the pattern G will be projected by the spring above the line of the mold, so that it can be readily removed by the melder.

The operation is as follows: If, forinstance, the cope-section of a mold for a oar-wheel is to be formed, then a suitable patternA'is arranged as shown, a chill-ring B mounted 95 thereon, and the fixed section E 'of the cope D is secured to the chill-ring or to the pattern, as desired. The movable section F of the cope is in the elevated position, as shown in Fig.

3, the latches C supporting the section F in 10o its elevated position. Sand is then placed in the cope formed by the sections E and F and is packed around the ribs or partitions of the movable section F, the patterns G to form the pouring-openings being previously set in position. After the sand has been loosely placed within the flask the iiask is run under the platen of a suitable molding-press, and the latches are turned down, and pressure is applied to the movable section F and the sand within the said section, so that the sand as pressure is applied will be compressed to the proper density, and when the section F,with its partitions or ribs, is forced down to the position shown in Fig. 4 the latches C are then turned up and over the lugs on the section F, so as to hold the section in position. Thus a mold is formed inwhich the desired quantity of sand has been previously loosely packed Within the flask and around its ribs, which can readily be compressed to the proper den sity in the ordinary molding-machine. The upper section of the Vfiask is open, so that the sand can be properly packed around the ribs and around the pouring-opening patterns, thus insuring the accurate preparation of each mold for casting.

I claim as my inventionl. The combination in a fiask of a fixed section, a movable section mounted within the fixed section, ribs or partitions carried by the movable section, said section being open at the top so that the sand can be packed into the mold prior to compression of the same with a single device constructed to perform the double function of holding the movable section in either its elevated or its depressed position, substantially as described.

2. The combination of a fiask made in two parts, one part being xed and the other part being movable, vertical slots in one part, and lugs on the other part entering said slots, and stops to limit the movement of the movable part of the fiask, substantially as described.

3. The combination of a two-part iiask, one part being iixed, the other part being movable within the said fixed part and having stops to limit the movement of the said movable part, latches on one part and lugs on the other part, said latches and lugs being so arranged that the latches will support the movable part when raised and hold it down in position when depressed, substantially as described.

1l. The combination of a pattern A, a chillring B mounted on the pattern, a two-part flask D, one part E being lixed, bolts securing the said fixed part to the chilllring, the .movable part F arranged to slide within the fixed part, said movable part having an annular rib or partition; and radial ribs extending from the annular rib to the outer portion of the section, a stop to limit the upward movement of the movable section, and means for holding the movable section either in its raised or depressed position, substantially as described. In testimony whereof .l have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT C. TOLMIE. Witnesses:

WILL. A. BARR, Jos. H. KLEIN.

Images