US1428048A - Centrifugal casting machine - Google Patents

Description

w. s. MYERS. CENTRIFUGAL CASTING MACHINE.

APPLICATION FILED NOV. l; i918-K Patentedept" 4 flllllllllllllllllllll.lvrfllflllaflfla Patented Sept, 5, 1922.l

STATES PATENT uitrit-cli.`

WALTEE s. 4iframes, or DAEEY, PENNSYLVANIA, Ass'IGNoR-To UNITED sTATEs cAsT IRON PIPE a roUNDRY COMPANY, or BURLINGTON, NEW JEnsEY, A CORPORA- v Tron or' NEW JERSEY.

CENTRIFUGAL CASTING MACHIN.

Application filed .November s1, 1918. Serial No. 260,645.

To all 'wko/mit my concern/' Be it known .that Ik, WAUrER S. MYERS, a citizen of the- United States of America, and a residentof Darby, in the county of e Delaware, in the State of Pennsylvania,

have invented certain new and useful Improvements in' Centrifugal Casting Machines, of which the following is a -true and exact description, reference being had to the accompanying drawing, which, forms part thereof.

-My present invention relates to centrifugal pipe casting machines for forming relatively large size cast iron pipes, and the general object of the invention is to provide improved means for lsupporting the rotating mold during the casting operationand.

for connecting and disconnecting the mold from the mold rotating means and for moving the molds into and out of the casting machine. Y

The various features of novelty which characterize 'my invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, and the advantages possessed by it reference should be had to .the accompanying drawings vand descriptive matter in which I have illustrated and described preferred embodiments'of my invention. C'fihe drawings: i Figure l is anelevation partly in section on the line 1-1 of Fig. 2j

Figure 2 is an end elevation of the apparatus shown inFigure l. Figure 3 isa' sectional elevation of a por tion ofthe apparatus. shown in Figure 1, `but on a largerscale than Figure 1, and ed'. .Figure 4 is a view taken similarly to Fig,- ure. 1, showing a modified construction.

In the drawings, and referringuiirst to the construction shown in Figs. 1,'2 and 3, -A represents the stationary supporting frame work ofthe casting machine proper and B'represents a pedestal mounted thereon and grotatably supporting a memberl C to which, one end member F` ofthe rotating mold is secured in the casting. oper'- ation. As shown, the member C-is in the form of a sleeve having annular ball race members C secured to its periphery as by shrinking them in place. Cooperating stationary ball race members B are secured in the cylindrical seat 'Bs formed in the pedestal Bas by means of the flange B2 detachably closing one end ofV this seat. The opposite end of the seat B3 is closed by an integral inwardly projecting iiange portion of the pedestal. Cooperating with each pair of ball races 'B' and C are a set of bearing balls D.' At one end .of the rotatable sleeve C is formed a conical .surface C2 engaging the surface F provided at the end of the mold. As shown, this engaging surface F is formed on an end member F fitting against and separable fromthe spigot end of the body portion E of the rotating mold. The opposite end of the mold body is .provided with a separable end member K which is formed with a conical socket to receive' the end of a longitudinally-movable driving spindle I. The latter is splined in an elongated tubular member H, which is journalled at its ends by ball bearings DA in pedestals G and GA mounted in the framework A. A driving pulley H', secured on the sleevey H, between the pedestals G and GA, forms a means for imparting rotating power to the member H to rotate through the spindle I the rotatable mold E. `To prevent slippage between the mold and the spindle I the latter is provided with a Vradial driving pin I3A to engage with a driv ing lug K2 formed on the end member K.

To axially yadvance the spindle I, I have provided a fluid pressure motor cylinder l which is in axial alignment with the spindle I and has its piston rod J swivelled'to the' end of the spindle, as shown best in Fig. 3. yTo reduce friction in operation I preferably employ a ball thrust bearing' J2 be tween the spindle 'I and piston rod J as shown. The moldv E visprovided with a dry sand lining E and the end Amember F of the spigot end of the mold is provided -with a seat fora dry sand collar F2, While the-end member K at the bell end of the mold is provided with a seat for a suitably l 'the latter is a vertically acting fluid pressure motor cylinder M, the piston of which supports a cross head or cradle M which forms against which the metal forming the spigotl a means for-elevating the mold into and out of its operative position in which it is in axial ali ment with the spindle I and sleevev C. tationary track railsl L, extending transversely to .the length of the mold below the latter, form a track along which an empty mold may be rolled into position above the lowered cradle M', and along which a mold with the casting formed therein, lowered by the cradle upon the rails, may be rolled away for delivery to the apparatus for pulling the 'casting out of thev mold and forrelining the latter preparatory to a subsequent molding operation. The molten casting forming metal may be introduced into the mold in any known or suitable manner. O indicates the cast pipe in the mold. 4

In the modiiied construction shown in Fig. 4 the end member KA of Athe mold en? .gaged by the spindle I is at the spigot lend of the mold, and is'provided with an an nular recess seat for a dried sand core K10 end of the pipe mold abuts. 'Ihe end member FA at the bell end of the mold is provided with a seat for a suitably shaped dried sand core F10, and the end member FA is formed with a central aperture through which the mold may be charged with molten metal byfany suitable or usual means not shown. In this form of my invention the mold is formed at'the bellv end withv a'portion externally tapered to fit in the tapered socket C formed in the rotatable annular member CA, which journalled by means of ball bearings in the pedestal BA. The arrangement shown in F1g. t` permits of a more compact construetion for the means supporting the end of the rotatingl mold remote from the axially and rotatively movable spindle I, and permlts of a reduction in the weight sup= ported by the spindle I.A `The mold re ceiving cradle M10 carried by the piston or cyllnder Min Fig. 4 is provided with rolls M11 directly engaged by the mold.- These.

' dsengage the mold from the bearing member BA.

isy

With the casting apparatus shown it will be obvious/that a mold in con-dition for casting may be easily and expeditiously moved off of the supporting track rails L into operative relation with the means for supporting and rotating the mold inthe casting operation, e`and, that at the conclusion of the casting operation the mold with the casting therein may be easily and quickly removed from the rotating means and taken awa to the stations for withdrawing the feasting and putting themol-d again in condition for a subsequent casting operation. As rapidly as the casting is formed in one mold andathe latter is removed a previously preparedmold may be put in place so that a large number of pipes may be cast in a given time in a single casting machine.

Whilev in accordance with the provisions of Lthe statutes I have illustrated and described the best form of my invention now known to me lit will be apparent to those skilled in the art that chan es may be made in the form of the apparatus disclosed without departing from the spirit of my invention as set forth in the appended claims, and that certain features of my invention may be used to advantage in certain cases withoutl a corresponding use of other features.

I-Iaving now described my invention, what I claimfas new and desire to secure by Letters Patent, is:

1. I' a y@entr-itugal castin machine the combination of a rotatable e ement having second rotatable element also having a cone shaped portion adapted to engage and center the other end xof the mold one of said rotating elements being formed with a central opening Athrough which molten metal can be charged into the mold, a means for adjusting oneof said elements axially so as tolgrip and release the mold. r

2. n a centrifugal casting machine the combination with rotatable elements adapted to engage the opposite ends of a pipe mold, means for adjusting said elements toward and away fromone another to `grip and release a mold inserted between them, supports along which a mold may be moved to'ward and away from said rotatable elements and mechanism for raising and lower? combination with l.rotatable elements adapt` ed to engage the opposite ends of apipe mold, means' for a justing said elements toward and away from`- one another to grip and release a mold inserted between them, tracks -alongwhich a mold ma be moved toward and away from said elgments and mechanism for `raisingjr and lowering a mold from said tracks into alignmentwith said closures for the shell, and. a support for the ends of the mold or ilask, the core rings and supports havin matching beveled ortions to cause a li ting of the mold W en the beveled portions are brought into eligagement.

WALTER S. MYERS.

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