US30525A - Improvement in molding cast-iron wheels - Google Patents

Description

' nrrn Srarns FATENT OFFICE.

GEORGE S. BOSVORTH, OF TROY, NEV YORK.

HWPROVEMENT lN MOLDING CAST-IRON WHEELS.

Speci lic-ation forming part oi' Letters Patent No. 30,5255, (l ated October 30, 1860.

To @ZE whom it may concern.-

Be it known that I, Gnonen S. BoswonTi-r, of the city of Troy,in the county of Rensselaer and State of New York, have invented a new and useful Improvement in Molding Cast-Iron Car and other W'hcels with Chilled Rims, whereby the requisite molds for casting such wheels can be made by less skillful workmen and more expeditiously, and at less expense than previously; and I do hereby dec-lare that the following is a full and exact description thereof, reference being had to the annexed drawings, making a part of this specification in which the same letters of refence indicate like parts in all the figures.

Instead of employing` but one pattern of the same' form as the whole exterior of the wheel A to be cast (shown in section by Fig. l) in the manner commonly practiced in making molds for casting in one piece car-wheels with chilled rims I use in making such molds two face-patterns,B @,{shown in plan by Figs. 2 and 3,separately in section by Figs. 4; and 5, and together in section by Iig. 6,) one of which face-patterns, B, is of the same form as one face, d, of the wheel, and the other, (l, of the form of the other face, c, whatever form the faces of the wheel may have, both facepatterns having immediately around the outer edges of those parts which are in the form of the faces of the wheel, annular surfaces f g, of the same form as the corresponding parts, j" g', ofthe chill H, (shown in section by Fig. 7, and partially in plan by Fig. 8,) which chill I also employ,together with two llasks, I J,(shown in plan by Figs. Qand 10.) The facepatterns B O also have whatever projections e y x are required to make the necessary coreprints, if any cores are used in casting the wheel; also, the outer portion of one face-pattern,B,is formed to lit one of the ilasks,l, and of the other, G, to fit the other flask, J, substantially as shown in Figs. 11 and 12, the tlasks and face-patterns being held in place when put respectively together by steady-pins 7s and corresponding holes, Z, or by other suitable or equivalent means. The flasks I and J also fit upon the corresponding sides, f g', of the chill, as shown in section by Fig. 13, and the chill is held in place between the ilasks by steady-pins k and holes m, or by equivalent devices.

In making molds for casting wheels with chilled rims by means of the face-patterns B C, flasks I J, and chill H in connection,

each flask is placed upon the face-pattern which belongs to it, and is then rammed up full of sand, as represented by Figs. 11 and 12, and a bottoni board, N, applied to the lower flask to hold the sand O therein. Next, each flask, clamped to its respective face-pattermis turned over. rlhen each pattern is lifted off from its ilask and the molds dusted N ext, each face-pattern is pressed or printed back upon its mold and then withdrawn, in order to remedy any defects therein and to leave the molds with the proper smooth surface for receiving the metal. The iii-gatesw being previously formed in the upper mold, and the cores o w, if any are used, being set in the lower mold, the chill is then placed upon the latter, and the upper mold placed upon the chill, so as to complete the mold, as shown by Fig. 13.

It is plain that the two face-patterns can be used if they are both formed upon the same side or upon opposite sides of a single block. Such changes are, however, mere modifications of my invention, and would readily occur to any competent molder and pattern-maker, and I greatly prefer to have the chill separate from each flask, and to have the facepatterns each oh a separate block. It is also apparent that disk-wheels of different thicknesses maybe cast by the use ofthe very same patterns and asks when the patterns are facepatterns B C by merely using chills of different depths; and this is a consideration of some importance in manufacturing car-wheels for roads which require or use wheels of different thicknesses 5 butit cannot be done with the patterns in common use. Agaimthe facepatterns which I use can be made so as to be less liable to .become winding when made, as commonly, of wood, than the patterns heretofore used, and if the face-patterns B C do get warped or damaged on their faces they can be turned off or otherwise made true without altering the thickness of the wheel made from them; but this cannot be donewith a single pattern of the form of the whole exterior of the wheel.

In using the two face-patterns the steadypins serve as guides, so that there is no difficulty in printing the patterns back upon the molds to remedy defects therein. Consequently the molds do not require to be slieked off by hand, and, therefore, workmen can readily make the molds by my improved Inode who are not qualified to make them by the method commonly practioechwherein thepattern cannot be printed back upon the mold with proit.

I am aware that itis not new to employ facepatterns in connection with flasks merely in making molds for casting stove-plates and like articles, and that it is not new to merely use a frame between two sand molds to separate them so that a casting can be made in the molds and within and of the same depth as the said frame, and that the mere employment of two flasks in connection with a chill is not new in making molds for casting car-wheels; but l do believe that it is new to employ the two faee-patterns B C, two flasks, I J, and chill H, all three in combination or connection as above specified, and illustrated by the annexed drawingsnd by thus using them all iu connection in making molds for casting earwheels with chilled rims in I am enabled to make such molds much faster, generally better, and with far less labor and expense than by the method in Common use, and can, therefore, manufacture suoli wheels at a cheaper rate than they have been heretofore made.

Having thus shown the manner of practicing my invention, what I cla-im is- Forming a mold by means of a flask, consisting` of three part-s, to wit: a cope, a nowel or drag, and cheeks or chill, the two former being open to rain up the sand to form the mold on facepatterns which can beprinted back, the mold being formed in the manner and by the means set forth, and the thickness and weight of the wheel being determined by the depth of the cheeks, which can be varied in the same sized wheel and with the same pattern andsame cope and nowel.

GEO. S. lEOSVORTH. RVi t n esses l. S. BARNBY, A. F. Panic.

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