US826997A - Castng-mold. - Google Patents

Description

No. 826,997. PATENTED JULY 24, 1906.

' M. R, CUFF.

CASTING MOLD. APPLIOA'IION FILED FEB. 21 1906.

attorney State of NewvJersey,

skilled in the art to which it MICHAEL R. corn, or JERSEY orgasm JERSEY.

CASTING-MOMS}:

Specification of Letters Patent.

Patented. July 24, 1906.

Application filed February 21,1906. Serial No. 302,256.

To all whom it may concern:

Be it known that 1, MICHAEL R; Gurnof Jersey City,

in the county ofHudson and hav e invented- 5 certain new and useful Improvements in Casting- Molds; and I do hereby declare'the following to be a full, clear, and exactzdes'cription of the invention, such as will enable others appertains' to make and use the same. i

This invention contemplates improving the mechanical construction'of that class of p, molds for brass castings which are made of -metal, usually iron, and which when closed form a cavity or matrix, into which the molten brass is poured to obtain the cast.

The object of the invention is to prov'de a construction especially designed for casting journal brasses or bearings for axles of railroad'cars and engines, in which the parts of the mold forming the portion of the casting to which the axle-box is secured may be remov ed and others substituted without changing the remaining parts.

A further object is to provide a mold which may be quickly opened and closed and which is securely lockedinits closed position.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims. a

In the accompanying drawings, Figure 1 is a perspective view showing the mold closed. Fig. 2 is an end view showing the cope opened and indicating in dotted lines the open positions of the drawbacks forming the sides of the casting. Fig. 3 shows the finished cast- 1n Referring to the drawings, 1 designates a base or pedestal on which is mounted a stationary frame or structure 2, having a vertical portion 3 and a widened base portion 4. A pipe 5 is vertically disposed in the vertical portion of the frame and closed at its lower end. This may contain a cooling medium, as water, or the cooling medium may be disensed with, in which event the part 5 may e termed a inandre Its face 6, projecting beyond the inner edge 7 of the vertical portion 3, and the portion of the part 3 at either side of the pipe or mandrel constitute the drag of the mold, the face 6 forming the bearing-surface in the finished casting, as indioated at 8, Fig. 3. At either side of the core formed by the face 6 of pipe 5 is a false core or drawback 9, pivoted to the inner face of the vertical portion of the frame or vers being suitably secured by structure 2, as at 10. Each of these drawbacks is shown havin its inner edge 12 of the configuration which the casting 18 to assume at its sides, as indicated at 13, Fig. 3, and suitably curved at its base to fit snug against the pipe or mandrel. As an ap ropriate means of operating the drawbac s I ave shown levers 14, mounted u on brackets 15, secured to frame 2, the on s of the leswivel-joints to the drawbacks, so that ugon the levers being moved horizontally t e drawbacks will swing outwardly into the position indicated in dotted lines, Fig. 2.

16 designates the cope or case pivoted to the base portion 4 of frame 2, as indicated at 17. The cope is in the form of a frame designed to accommodate a dry-sand core or insert 18, forming the back of the casting, as indicated at 19, Fig. 3. When the cope 16 is closed, the recesses 20 on the inner face thereof are engaged by studs 21, projecting from the drawbacks 9. By this means the possibility of the drawbacks becoming laterally displaced is avoided. I have shown locking-- bars22- pivoted to the cope,bywhich the latter may be. secured to the frame 2.

23 is a s rue -hole at. the top of the cope.

From t e foregoing the operation of the mold will be readily apparent. With the parts in the closed osition (indicated in Fig. 1) and with or witfiout cold water circulating through pipe 5, the fluid brass is poured in through sprue-hole 23. When the casting within the cavity has become sufiiciently cool and set or hardened, the co e 16 is swung back, releasing the draw acks 9, whereupon the latter may be swung outwa'rdly and the casting removed. It will be noted that in the event of it being desirable to change the formation of the casting at its sides, as indicated at. 13 in Fig. 3, this may readily be accomplished by removing the drawbacks 9"and substitutingothers of the desired formation. Likewise the dry-sand insert 18 may be removed and another substituted of the desired formation and containing the desired marking which is to apear on the back of the castin I have ound it advisable to coat the surfaces forming the mold with a mixture of crude oil and.

metal. This has usually been done by drilling small holes or apertures throu h the metal, which often became clogged'an failed" to accom lish the s urpose. It has been found in t e use of t e mold embodying my invention that the connections between the frame 3 and'the drawbacks and between the I latter and the cope, while sufficiently close to retain the molten metal and insure the corl rect formation of the casting,v afford-sufficient vents-for. the escape of the ases, thus avoiding; the necessity of dril ing' holes through the walls of. the 'mold.. Practice has demonstrated that amoldembodyingmy invention effects a, great savingof time andlabor.

While I haveshown and described a single mold, itis-obvious that a double mold may be providedby duplicatingthe cope 161and drawbacks 9'on the opposite side of pipe or mandreli5, the frame 2and the-levers 1.4v and 22. being. suitably. changedfor that. purpose. a

I claim as-my invention l In a mold-for: castings, adrag-having, a. pipe designedto contain a. cooling mediums and to constitute a core forming, the bearingsurface of the casting, a cope having aninsert l forming the back of the casting, independent pivotal mounted drawbacks intermediate said drag; and cope and forming the sides of. the; casting, and means for: swinging said drawbacks away from saidcore.

2. In avmold for castings, a drag containing alcore formingthe bearing-surface of the casting, a cope containing aninsert forming the backoff the casting,-two drawbacks piv- 1 face of the casting, of a cope-pi'votallymount- 'ed on saidbase portion. and OODlQfliIliIlggtLll; back of the casting, ;drawinsert forming the backs pivotedto saiddrag, at: opposite sides;

of'said pipe, means foroperating said draw? backs to swing them awayfr.om.tsaid,pipe-,= and means for locking said drawbacks to '7 said cope 4. In a mold for castings, the combination;

withthe supportingeframe having a base portion, a vertically-disposed drag,

back of the casting, drawbackspiyotedi to said drag; atopposite sidesof-said1pipec= or, levers-1 pivotally: mounted, on;

mandrel, and said frame andsecured to said drawbacks;

anda pipe or mandrellmounted in saididrag-and designedi to form the bearing-surface: ofz-the casting, of, a cope pivotally mounted on saidrbase pore tion and containing an insertformingthe- In testimonywhereof. I. have signed: this I specification in the presence of two subscribe ingwitnesses.

MIOHAEE R. CUFF. Witnesses:

GRAFTON L. McGILL. ALIoE LIN-D.

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