US1218437A - Process of molding. - Google Patents

Description

A. MCNAUGHTON.

PROCESS OF MOLDING.

APPLICATION FILED AUG-23, 1915.

1,211 8,437. Patented Mar. 6, 1917.

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ALEXANDER MoNAUGI-ITON, OF BUFFALO, NEW YORK.

PROCESS OF MOLDING.

To all whom it may concern: 1

Be it known that I, ALEXANDER MoNAUGH- TON, 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 ina Process of Molding, 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 riser causes the sand around the riser to fuse with the ends of the gaggers. WVhen the casting is still red hot the sand must be broken away from around the risers before the cope can be removed and because of, the fusing above mentioned this operation is extremely difficult, in View of the excessive heat. This necessitates much extra labor and requires considerable time. In producing my invention I have sought to provide a process in which the above objections may be overcome. My invention comprises a process wherein means are employed for holding the sand to shape around the risers and thus permitting the gaggers to be set back far enough so that they will not fuse with the sand around the risers when the mold is cast.

In the accompanying drawings I have shown one form of means or apparatus for carrying out my process, but it is obvious that other means or apparatus of different form may be employed with equal efficiency. In the drawings:

Figure 1 represents a fragmentary, plan view of a mold provided with apparatus for carrying out my process, the sand in this view, for clearness of illustration, being omitted.

Fig. 2 is a sectional elevation of the ap' paratus taken on line 22 of Fig. 1.

Fig. 3 is a perspective view of one of the filler casings employed in carrying out my process.

Fig. '1 is a perspective view of the key used for withdrawing the filler casings.

Specification of Letters Patent.

Patented Mar. 6, 1.91'7.

Application filed August 23, 191s. Serial No. 116,443.

Fig. 5 is a fragmentary, plan View of the apparatus, showing sand between the filler casin s.

Referring now to the drawings, and more particularly to Figs. 1 to 3 inclusive, 5 represents a molding flask of which 6 is the and replaced by the usual core when the pattern is withdrawn.

13 is a filler 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. 4. These filler casings are so designed that when placed together the filler has a slightly larger diameterthan the diameter of the riser print. This provides space for a sand lining 15. The filler casings 14 may be placed close together (as shown in the drawings) or they may be separated slightly so as to permit the sand to be passed therebetween, which facilitates somewhat their easy withdrawal.

When the apparatus shown in the drawings is to be used the pattern 10 is placed within the drag of the flask or on the molding floor and the cope 6 placed over the same. The pad core 12 is placed upon the pattern where each of the risers is to come and upon this core is placed the riser print 11. About this riser print are now placed the filler casings 14. The gaggers 9 are now put into position with their ends closely adjacent to the filler casings 14 and the mold is rammed up in the usual manner.

After the casting is poured'and has become sufficiently. solid to remove the cope,

that with my process the risers and the cope may be quickly and easily removed Without the disagreeable labor which attends the old method of releasing.

Having thus described my invention, What I claim is:

1. The herein described process, comprising the placing of a filler about the riser print of a pattern, then placing the gaggers in position With their ends adjacent to the filler, and then rammin sand into the mold.

2. The herein described process, compris ing the placing of a filler, larger than the riser print, around about said print, then placing the gaggers in position with their ends adjacent to the filler, and then ramming sand between the filler and the print and into the mold.

In testimony whereof, I have hereunto signed my name in the presence of two sub scribing Witnesses.

ALEXANDER MONAUGHTON.

Vitnesses J. VVM. ELLIs, XVALTER H. KELLEY.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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