US1218438A - Apparatus for releasing copes and risers. - Google Patents

Description

' A. McNAUGHTON. APPARATUS FOR RELEASING COPES AND RISERS.

APPLICATION FILED NOV- 3,1916- I I P Patented Mar. 6, 1917.

2 SHEETS-sflEET f/VVEN TOR A. McN'AUGHTON.

AEPARATUS FOR RELEASJNG COPES A'ND msERs. Y 4

APPLICATION HLED NOV- 3, 1915- 1,218,438. Patented Mar. 6, 1917.

2 SHEETS-SHEET Z.

ALEXANDER McNAUGI-ITON, OF BUFFALO, NEW YORK.

' APPARATUS FOR RELEASING- COPES AND RISERS.

Specification of Letters Patent.

Patented Mar. 6, 1917.

Application filed November 3, 1916. Serial N 0. 129,388.

To all whom it may concern.

Be it known that I, ALEXANDER Mo- NAUGHTQN, a citizen of the Dominion of Canada, residing at Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Apparatus for Releasing Copes and Risers, of which the following is a full, clear, and exact description.

It is well known to those skilled in the art, that when molding large castings it is necessary that the cope be removed before the casting is cold in order that the usual shrinking may take place without restriction. Before the cope is removed it is necessary that the sand be broken away around the risers provided in the mold. The sand around the risers, as is well known, must be supported by gaggers and, these are placed very close to the print when the pattern is molded. When the mold is poured the metal coming up through the risers causes the sand to fuse with the ends ofthe gaggers. When the casting is still red hot the sand must be broken away from around therisers before the cope can be removed and because of the fusing above mentioned this operation is extremely difiicult, in view of the excessive heat. labor and requires considerable time.

In producing my invention, I have sought to provide an apparatus which will greatly simplify the releasing of the risers and copes and which shall result in a great saving of time and labor.

My apparatus is such that it may be cheaply and easily manufactured.

The above objects and advantages have been accomplished and the disadvantages overcome by the device shown in the'accompanying drawings. In the drawings:

Figure 1 represents a fragmentary, plan view of my apparatus, the sand in this figure, for clearness of illustration, being omitted. p 1 Fig. 2 is a sectional elevation of my appa ratus and is taken on line 22 of Fig. 1.

Fig. 3 is a perspective view of one of the filler casings of my apparatus.

Fig. 4 is a perspective view of the key used for withdrawing the filler casings.

Fig. 5 is afragmentary, plan view of a modified form of apparatus.-

This necessitates much extra Fig. 6 is a sectional elevation of the form of apparatus shown in Fig. 5, taken on line 66 of Fig. 5.

Fig. 7 is a plan View of a modified form of filler-core.

Fig. 8 is an elevation of the core shown in Fig. 7

Fig. 9 is a fragmentary, plan view of the form of apparatus of Fig. 1 showing sand between the filler casings.

Referring to the drawings and more particularly toFigs. 1*to 3, inclusive, 5 represents a'molding flask of which 6 is the cope and 7 the drag or molding floor. 8 are the usual flask bars which support the gaggers 9.

In'Fig. 2, 10 represents the pattern within the mold and 11 the riser print, these parts for clearness of illustration, having been omitted in Fig. 1. 12 is the well known pad core, which is placed upon the pattern and beneath the print 11, and which is removed and replaced by the usual core when the pattern-is withdrawn from the mold.

13 is the filler of my apparatus, which preferably comprises a plurality of filler casings 14. Each of these filler casings is preferably hollow'and provided with tapering walls, whereby each casing is larger at its top side than at its bottom. In the top face of each casing is provided an elongated slot 17 whereby the casing may be lifted by means of the key 16, shown in Fig. L. This key is provided with a T-shaped end 18, which is made to fit the slot 17 and engage with the under side of the top of the casing.

A handle 19 is provided whereby the key may berotated and the casing lifted.

The filler casings 14 are so designed that when placed together the filler has a slightly larger diameter than the diameter of the riser print, which provides a space for a sand lining 15. The filler casings 14 may be placed close together (as shown in the drawing) or they may be separated slightly so as to permit sand to be passed therebetween, which latter arrangement facilitates, somewhat, the easy withdrawal of the casings.

Referring now to Figs. 5 and 6, where I show a modified form of apparatus, 20 is the filler, which is, preferably, square in shape. This filler comprises, preferably, 4 filler cores 21. Each of these cores isprovided with an outer metal casing 22, which extends around the two sides of the core. It is also provided with an inwardly extending lip 23. Each of the casings is placed in a box and a core of sand 24: is rammed up to the desired shape as shown in the drawings.

Figs. 7 and 8 illustrate another modification of my apparatus. In these figures I show a baked core 25 which is made substantially the same as the filler casings 22 of the filler 20 shown in Figs. and 6.

When the apparatus shown in Figs. 1 to V 3 inclusive, is to be used, the pattern 10 is placed within the drag of the flask or the molding floor and the cope is placed over the same in the usual manner. The pad core 12 is now placed upon the pattern where each of the risers is to come and upon this core is placed a riser print 11. The filler casings 14 are now placed about the riser print with, preferably, an equal space between them and the said print. The gaggers 9 are now put into position with their ends closely adjacent to the filler casings 14:. The sand is now placed within the space between the filler and the riser print after which it is rammed up. The mold is also now rammed up in the usual manner. After the casting is poured and has become sufliciently solid to remove the cope, the T-shaped end 18 of the key 16 is now placed within the slot 17 in each of the filler casings and the same are withdrawn from the sand. This leaves a space 35 between the sand surrounding the riser and the sand about the filler, so that the cope may be easily removed.

hen using the form of invention shown in Figs. 5 and 6, the molder places a filler core print of the same shape and size as the filler upon the pad core and the gaggers 26 are placed in position, after which the mold is rammed up as usual and the filler core print withdrawn. Each of the metal casings 22 is now placed within a box and a rammed up core is made by the molder. The box referred to and not shown is so designed as to form a quarter of a tapered cylindrical print so that when the four casings are put together the riser opening 27 will be provided. After each of the filler cores 21 have been made they are put into position as shown in the drawings.

The filler cores 25 shown in Figs. 7 and S are formed to the shape shown in a core boX I and are afterward baked and are then placed in the mold in the same manner as described in connection with the forms shown in Figs. 5 and 6.

'After the mold is poured and sufliciently solid to remove the cope, the molder knocks away the sand in the filler core, and then removes each of the casings by any well known means. In the case of the baked filler core,

it is only necessary that the molder break away the sand, after which the cope may be quickly and easily removed.

Obviously, some modification of the details herein shown and described may be made without departing from the spirit of my invention or the scope of the appended claims and I do not, therefore, wish to be limited to the exact embodiment herein shown and described.

Having thus described my invention, what I claim is: r

1. In an apparatus for releasing copes and risers, the combination with the bars of a molding flask of a filler comprising a plurality of sections and a plurality of gaggers positioned adjacent the outside periph cry of the filler and supported by the flask bars, whereby the gaggers, being'set back from the riser by the filler, are prevented from being fused with the sand surrounding the riser. v

2. In an apparatus for releasing copes and risers, the combination with the bars of a molding flask of a filler comprising a plurality of sections, a plurality of gaggers positioned adjacent the outside periphery of the filler and supported by the flask bars, and a sand lining disposed between the filler and the riser opening, whereby the gaggers, being set back from the riser by the filler, are prevented from becoming fused with the sand surrounding the riser.

. 3. In an apparatus for releasing copes and risers, the combination with the bars of a molding flask of a filler comprising a plurality of hollow metal sections, a plurality of gaggers positioned adjacent the outside periphery of the filler and supported by the flask bars, and a sand lining disposed between the filler and the riser opening, whereby the gaggers, being set back from the riser by the filler, are prevented from becoming fused with the sand surrounding the riser. I

4:. In an apparatus for releasing copes and risers, the combination with the bars of a molding flask and ariser print of a filler comprising a plurality of filler casings, said filler being larger in diameter than the riser print, a plurality of gaggers positioned adjacent the outside periphery of the filler and supported by the flask bars, and a sand lining disposed between the filler and the print, whereby the gaggers, being set back from the riser by the filler, are prevented from being larger in diameter than the riser print, the riser by the filler are prevented from a plurality of gaggers positioned adjacent becoming fused with the sand surrounding the outside periphery of the filler and supthe riser. ported by the flask bars and a sand lining In testimony whereof, I have hereunto 10 5 disposed between the filler and the print, signed my name.

whereby the gaggers, being set back from ALEXANDER MONAUGHTON.

Copies of this patent may'be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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