US244214A - William fawcett - Google Patents

Description

I 140441.) W; PAWGETT,

'FLASK FOR MOLDING GAR WHEELS.

No. 244,214. Patented July 12,1881. 4

"WITNESSES": I mmom W 'BY ATTORNEYS.

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. UNITED STATES PATENT QEEicE.

WILLIAM FAWGETT, OF OMAHA, NEBRASKA.

FLASK FOR MOLDING CAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 244,214, dated July 12, 1881.

Application filed April 29, 1881.

To all whom it may concern Be it known that I, WILLIAM FAWOETT, of Omaha, in the county of Douglas and State of Nebraska, have invented a new and useful Improvement in Flasks for Molding Oar-Wheels, of which the following is a specification.

Figure 1 is a plan view of my improvement, showing a portion of a chill applied to it. Fig. 2 is a sectional elevation of the same, taken through the line .2: a2, Fig. 1, showing in addition a part of the cope F above the chill.

Similar letters of reference indicate corresponding parts.

The object of this invention is to facilitate the manufacture of car-wheels.

The invention consists in constructing the drag in a flask for molding car-wheels of two concentric rings connected by cross-bars and also in the combination, with the bottom plate and the chill, of the drag formed of two concentric rings connected by cross-bars, as will be hereinafter fully described.

In the accompanying drawings, A represents the bottom plate of the flask, and B O D is the drag or cheek.

E is the chill, and F the cope, of the usual construction.

The flask, as composed of the cope F, chill E, and dragB O, is,in formingthe mold,worked as one piece-4. 0., they are not to be separated. Thus in preparing the mold the flask F E B G is turned upside down, or in position the reverse to that shown in Fig.2. The pattern of the wheel is then inserted and sand rammed inside the ring B, and also between rings B and O. The bottom plate is then put on top of the inverted flask, and the flask then turned over to the position shown in Fig. 2 and sand rammed through the top of the cope upon the top side of the pattern. This being done, theflask, as composed of the cope F, chill E, and drag B O,is lifted ofl' the bottom plate. forming a parting extending from the apex of the pattern-flange down along the inside of ring Bto the bottom plate, and thence directly out the upper surface of the bottom plate, the sand between rings B and 0 going with the flask, and the sand inside the ring B staying on the bottom plate. Thepattern is then lifted (Model) out, and the flask F E B G is then placed back again on the bottom plate, and the mold is then ready for the metal.

The drag is formed of two concentric rings, B O, which can be of equal or unequal depths, and which are connected together by crossbars or webs D, so as to leave sufficient space between the rings for holding sand. The inner or dividingrin g, B,is made conical, and serves as a parting-line for separating the two bodies of sand, and allows the sand within the inner ring and the sand between the rings to be rammed at the same time. The inner ring,B, allows a portion of the sand to remain on the bottom plate when lifting of the flask F E B O, and by its peculiar construction carries the sand on the upper side of the flange portion of the mold and holds the sand between the rings, while the flask F E B O is lifted off to allow the pattern to be removed and the mold to be finished. The beveled hearin g or outer surface of the central body of sand left by the inner or conicalring,B, acts by its inclination asa guard in lifting off the flask, and when bringing the flask together again makes the parts of the mold to bear freely and steadily, and always to have the same relative position, for the reason that the sand was molded against the ring. The effect of this arrangement is that practically no fins or ugly scars are left on the wheel.

The chill E for the tread of the wheel is made separate, and is fastened to the drag B G D; but the drag and chill can be cast together, if desired; or the drag can be used without any chill when the wheel is to be cast without having its tread chilled. The drawings show the dragfilled with sand, the pattern being drawn so as to illustrate how the sand on the upper side of the wheel-flange is carried orlifted. The drag, chill, and cope are all fastened together for quick molding, thus doing away with all loose parts of a flask and giving great accuracy and very satisfactory results.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a flask for molding car-wheels, the drag or check constructed substantially as herein shown and described, consisting of the concentric rings B (J, connected by cross-bars D, as set forth.

2. In a flask for molding car-wheels, the

5 combinatiomwith the bottom plate and the chill E, of the drag or cheek B G D, substantially as herein shown and described, whereby the melding of car-wheels is greatly facilitated, as set forth.

WILLIAM FAWGETT.

Witnesses BYRON REED, LEWIS S. REED.

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