US2150962A - Apparatus for casting finger rings - Google Patents

Description

March 21, 1939. I F. H. cuRL 2,150,962.

APPARATUS FOR CASTING FINGER RINGS Filed Oct. 4, 1937 Patented Mar. 21, 1939 UNITED STATES PATENT OFFICE half to Albert E. Kullander,

Iowa

Des Moines,

Application October 4, 1937, Serial No. 167,240

2 Claims.

My invention relates to the art of finger ring casting and particularly to that class of devices for this purpose disclosed in United States Letters Patent No. 1,115,905, issued to me November 3, 1914. With the device there disclosed it was not practicable to cast the crown of a ring if the crown comprised a cup-shaped recess to receive a setting or if the crown was embossed.

The object of my present invention is to provide an apparatus for finger ring casting of sim ple and inexpensive construction and which may be readily, quickly and easily operated to mold, with great accuracy and a minimum loss of metal, finger rings having crowns of any structure or design, and accurately reproduce not only the body of the ring pattern but the entire crown portion of the ring pattern.

More specifically, it is my object to provide a drag flask member of two parts separable along a vertical longitudinal line and hinged together at their lower ends, and a cope flask member having drag pins to co-operate with sockets on the drag member in the ordinary way, and at the same time to firmly and securely hold the two sections of the drag member together as required when tamping the mold, and to release the section of the drag member as required for removing the pattern when the cope member is removed.

A further object is to provide means for forming a clear, sharp separation of the molders loam at the longitudinal center of the pattern when the sections of the drag member are swung outwardly to remove the pattern and insert a core.

In the accompanying drawing Figure 1 shows a vertical central sectional view of my improved apparatus taken through the longitudinal center of the cylindrical pattern member.

Figure 2 shows a similar view taken at right angles to that of Figure 1 and showing the cope member of the flask in an elevated position.

Figure 3 shows a view similar to Figure 2 with the cope member in position relative to the drag member, and with the cylindrical pattern member removed and a core inserted in the flask in lieu thereof.

Figure 4 shows a vertical sectional view of the drag member of the flask with the hinged portions thereof separated for the removal of the cylindrical pattern member and the replacement of a core.

Figure 5 shows a vertical sectional view of my improved flask with the pattern therein and shown in the position it assumes when the molders loam is first tamped in the flask.

Figure 6 shows a similar view to Figure 5 and in an inverted position with the molders loam separated along the line with the crown of the ring pattern and with the core in position within the ring pattern.

Figure '7 shows an enlarged detail sectional View through the cylindrical pattern member and the ring pattern member; and

Figure 8 shows a top or plan View of same.

Referring to the accompanying drawing, the drag member of the flask is formed of two semicylindrical bodies IS, with hinge members II projecting downwardly therefrom and hinged together. At the adjacent free corners of the drag member are the recesses l2 to receive the cylindrical member hereinafter described. At the outer upper surface of each of the drag members is a drag pin socket l3.

The cope member I4 is cylindrical in form and has two drag pins 15 projecting downwardly therefrom to enter the sockets l3 and also two pattern supporting pins to arranged with sides diagonally opposite from the pins H5.

The pattern support comprises a cylindrical member I! of a length greater than the width of the drag member and of such size as to enter the recess I2 and be held therein by the pins l6. Mounted on the pattern support is a pattern ring member I8 which is fitted to the cylindrical pattern member ll at its central portion, and this ring member, as illustrated in Figure 7, has in its crown a recess Hi to receive a stone setting or the like.

Mounted upon the top surface of the cylindrical pattern member H, as shown in Figure 1, are the molders loam separating fins 20. These are straight narrow fins with their adjacent ends fitted against the ring pattern and extended outwardly and upwardly toward the cope member.

In practice the cylindrical member with its ring member mounted thereon is placed in position within the recess I2 of the drag member. Then the cope member is placed in position on top of the drag member with the drag pins l5 entering the drag sockets l3 and the pattern supporting pins i 6 projected through suitable openings in the cylindrical pattern member 11. This can be readily and quickly accomplished and when in this position the drag pins [5 will not only hold the cope member in position relative to the drag member but also look the two sections of the drag member against outward swinging movements on their hinges, and in addition loam may be powdered in the manner usually practiced by molders, so that when the cope member is again filled with molders loam, as shown in Fig. 6, there will be a line of separation and the copy member may be raised as shown in Fig. 2 and the molders loam will remain in the cope member and in the drag member as shown in Fig. 2. When this has been done the operator has access to the crown portion of the ring pattern member and removes the molders loam from around the crown or from the recess I9 in the crown. In this manner a pattern may be formed in the molders loam from whichan actual reproduction of the crown of the ring may be -molded. When this has been done, the top surface of the cylindrical mold member I! is close to the top of the molders loam within the drag 7 drag member, and the loam will be cleanly divide'd at its upper portion because of the fins 20 and the cylindrical mold member I1, and the molders loam below the cylindrical member I! will be separated on more or less straight lines, but without any injury because the molders loam on one side will fit into the other side'when' the parts of the drag member are again brought together. Then when the pattern has been re-. moved a loam core 2| may be inserted in the space formerly occupied by the cylindrical pattern member I1, and the parts of the drag member brought together and held in this position by the drag pins on the cope member entering the sockets I3 of the drag member, whereupon 'the casting may he proceeded with in the ordinary manner.

In actual practice with my invention I have demonstrated that the mold may be prepared to receive the molten metal very quickly and easily and that the finger rings will be cast with a minimum of surplus metal adheringthereto. I have demonstrated that in practically every instance the molders loam within the drag members will readily and easily separate when the drag mem bers are swung outwardly away from each other, and this separation. will be along the central line through the cylindrical mold member, at least at the upper portion of the drag members, so that the pattern may be readily and easily removed and a core inserted therein, and then the hinged drag members may be swung together along ber, and when the cope member is removed the two sections of the drag member will be held together firmly enough for the purpose of handling the drag member by means of the hinges, and yet may be quickly and easily separated to remove the pattern when desired.

I'claim as my invention:

1. A molders flask, comprising a. drag member formed of two parts hinged together at their lower ends and formed with recesses at their up per adjacent corners, a cope member having downwardly extended pins at opposite sides, a pattern supporting member detachably' mounted member together when the cope member is in position on the drag member. V

2. A molders flask, comprising a drag member formed of two parts hinger together and having recesses at their adjacent free edges, a pat:-

. on said recesses andhaving openings at. its ends to receive said pins, and means carried by the cope member for holding the sides of the drag tern-supporting member detachably supported,

in said recesses, a pattern mounted on the pat tern-supporting member, fins fixed to the pat- -,tern-supporting member on opposite sides of the pattern and extended substantially in line with the line of separation of the hinged drag members, a cope member, downwardly extended pins on the. cope member to engage the sides of the drag member and hold'them against outward movement, and downwardly extended pins on the cope member to enter the pattern-supporting member and hold it against movement when the

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