US1323252A - de lavaud - Google Patents

Description

D. S. DE LAVAUD.

ROTARY CASTING.

APPLICATION FILED MAR. 25. I3I9.

Patented Deo. 2, 1919.

2 SHEETS-SHEEI I.

IIN.

.si Ai l m .M .mmw In .M mmv n. s. DE LAV/wn. ROTARY CASTING.

APPLICATION FILED MAR. 25| 1919'.

1,323,252. l Patented Deo. 2,1919.

2 SHEETS-SHEET 2.

fige 4 INVENTOR .MA/gym@ L M I AT R'NEY plurality of fluiddscharge outlets leading Y To all whom zt may concern:

Drmrrm sENsAUD E LAVAUD, or NEWr YORK, N. if.

ROTARY, CASTING.

. f Application led March 25,

Be it known that I, DIMITRI' SENsAUD'MDE LAVAUD, a citizen of the United "States of Brazil, and a resident of New| York, in the 'county of New York and State of New Yorlhaveinvented certain new andA useful Improvements' in Rotary Casting, of which the following is a specification.

This invention relates to rotary or centrifugal casting, and provides an improved method of cooling and rotating'the moldstructure and an improved apparatus to facilitate carrying out the process. By the resent invention, .the problems of providing ball bearings tb avoid jamming ofthe moldstructure in the journaling-structure, such as the ball 'bearin described in my copenderial No. 194,977, of proapplication ifliing arrangements for. water cooling the mold-structure under pressure, such as thse discussed in my copending application Se-.

rial No. 194,976,- and of providing power v mean'sfor rotating the mold-structure other @than the cooling fluid, such as the meansdisclosed in U. S.' Letters Patent No.k

1,276,038 issued ,to me, are all absent.

The new method involves rotating' the :mold-structure about an axis out of the horizontal, by floatingly supporting the mold-Y structure while rotating the same by the ac,- tion 'of a stream of fluid under pressure, preferably water; the stream preferably impinging against the mold-structure lbelow its axis and flowing around the outside `of the mold-structure .for-practically the entire circumference of the latter; the stream also, preferably, being so 'conined and guided that as it flows around the circumference it l is of gradually increasing cross section, with such cross section the result of maintaining ,the stream at substantially the same width,

that is, 4a width lsubstantially equal to the length ofthe mold-structure, but with the stream of gradually increasing thickness, as it liows around the mold-structure.

The new apparatus'to facilitate carrying outv the processincludes the combination with ,the mold-structure, Vof 'a structure surrounding structure jbeing provided with-a viluid` inlet approaching the Jmold-structure below its axis sulistantially-tangentially, a,

v recess following the curvature of the outer periphery of'. the -mold-structure .intermef diate the ends of the mold-structure. and a Specification of 'Letters Patent.

isis.' serial No. 285,027.

, from said one adjacent to each end of Patented Dec. 2, 1919.

recess at a point removed 1 l The invention also provides a novel arrangement, bywhich the fluid in the stream for sustaining, rotating and" cooling'the mold-structure is prevented -from leaving the spaces Ibetweenthe mold and surround-- ing structures, despite the comparatively hlgh velocity fof the former, while'at the same time the 'use of gaskets is avoided and the relatively moving parts are almost en-l' tirely if not entirely out of contact. These obJe'cts. are preferably attained bya construction wherein the exterior of the mold-` structure and the interior of the Isurrounding.-

structu`re,at opposite sides of the recess, are

both provided with alternate annular ribs and recesses, with each of several ribson one part seated in but out of contact with each v of several ribs on the other,although, as

- will be seen in the structure illustrated, the

ribs onthe mold-structure forming boundmg wallsof the recess for confining and guiding the` stream are in contact with' a spirally curved projection in the surround-` ing structure.

@The invention' will be more clearly underi* lstood from the following descriptiommwhen taken-Hin connection with. the accompanying drawings showing illustratively apparatus at present preferred. In this drawing,y

.Figure 1 v 1s a transverse section of a possilFile embodlment, taken on: the line. 1-1 of 1g. 2' i c rigfe is partially, as ,1-.01 itstupper half,

an axial section, rand partially, as -to its lower half, a side elevation;

' Fig. 3 is a fragmentary` view, tionen-line 3- 3 of Fig. Il;

Fig-4' is -a portion of :an axial section of mold, 'showing a' modification;

Fig. 5 is a'v section 'taken-on line 5--5 Aof Fig. 4; and

all

- Fig; 6 is a sideY elevation showing a further modification.

The yapparatis of Figs. 1, 12 and?) will being a sec-y lio --during discharge, an upper section'? and a lower section 8, detachably bolted togetherv as indicated at 9. inside the Ysurroundin structure therebyprovided, thereis yforme a plurality of ribs establishin recesses 10 and -11. These recesses receiv the'ri'bs 6 on themold-structure. the ribs 6 in the recesses V10 are out of -contact with `the latter.

readily detached/from the main body 4 of the mold-structure, without taking down the surrounding or journaling structure,l iixed pins 12 are set in the main body as shown in Fig. 2, and the auxiliary member is aper- 'tured to receive these pins so that the auxiliary member may be mounted on the main body as illustrated; 'the pins being' transthat centrifugal torce will tend -to tighten.

versely slotted and removable wedge-pieces 13 being relied on lto maintain 'the parts -4 and 5 of the mold-structure in secure en` gagement during casting. it will be seen .J rather than to loosen the wedge-pieces 13.

The iuid inlet is formed by providing a pipe 14 screwedinto thesection 8 or the surrounding structure, by .providing a cutaway portion 15 in the bottom ofthe lower .dii

forming curvatures 18 `pending below the axis oi` the mold' sections .of the mold-structure forming thesection of the mold-structure, and by. setting into this-cut-away ortion a root-member 16 uand' a door-mem er 1'?.

rihe inner edge ci the root-member 16 is downwardly beveled to conform to the con- (Fig. v1) inside the surrounding structure which establish a recess .19` of gradually increasing-'cross section for the sustaining, rotating and cooling stream for the'moid-structure. This recess l19 curves around4 the mold-structure. for

practically itsV entire circumference," confirming, beyond the point 20 (Figs. y1 and A3), as a vertically-arranged compartment 21 at the inlet side of the mold-structure destructure. The side bounding wallsy of this recess 19 are forn'ied by the inner, sides of the innermost-ribs ,6 (lig.- 2).-on the mold structure, which rest lightly against' the outer sides of the projections within the two curved walls 18. of the .recess 19. The' duid discharge outlet includes those It willbe noted that -b in order that, when desired, the auxiliary member 5 may be4 or more surrounding structures meseta para of the' recesses 11, which at my insane .are overlapping and in open communication with the bottom 'of the compartment 21,

and the two depending conduits 22 at the bottom. ot such recesses.

pcraton. l

The' stream lof water or' other lsuitable j fluid, entering the pipe 14, passes through and the door-member 17, and thence enters y' the. same and` between the roo-members'- 16 thek recess 19: As the stream passes around such recess, the mold-structure is Hoatin'gl supported,y rotated at the requisite yspeef and cooled under pressure; the stream being delivered to the recesses 11 and thence to the discharge conduits 22. 'Ehe paths of the stream, from its entrance' into .until its dischargefrom the'apparat'us, may be followed y notingrst the arrows in Fig. 1, then those in Fig. 3, and then those in Eig. 2.

rihe arrangement provided by the ribs 6 and the recesses, 10 and 11- preventsescape of fluid from the apparatus, except bin-'way` of the discharge conduits, despite thb absence of gaskets and the like.

in connection with the parts of the speciication here below, referenceshould be had to Figs. 4, 5 and 6. t

. rihe term mold-structure .is used herein, because while what is practically a uni= ta'ry mold has been described, it is obvious that a multi-part mold-structure may be used, even a laminated mold-structure as shown in Figs. 5 and Grand such as described in my copending application Serial No.

264,444. in the case of such laminated i mold-structure it would be desirable to place suitable gaskets 23, as of'fiber or soit'copper,

between the different rings orvlamin 24,'at

latter, to prevent the admission of any Huid into the spaces between the laminae near the inside of the mold-structure, and it would also be desirable to provide apertures in the laminee forthe passagel of 'tie-bolts 25 therethrough as described in my copending applithe outer marginal edge portions of the cation last' identified, but of larger cross sec'- tions than the cross sections of the tie-bolts themselves, as indicated at 26, to

rov-ide gas-escape passages alongside the tlc-bolts lengthwise the mold-structure. in Fig. 4,-

the thicknessesof the gaskets 2 3 andconsequentlyoi the spaces between-the laminas inside vsaid gaskets, are shown very much exaggerated. v

Also, it should be understood that while a comparatively s` ort mold-structure is illustrated, ene for .making lpot castings ,125 vention can be Well applied vto Ya llonger f from which to machine piston rings, the inmold-structure', as one for making pipe, such a moldQstructure, for example,I as indicated at 27 1n Fig. 6, and in the'latter7case, one

tainin recesses similar to the recesses 19, or'

sists in fioatingly supporting the moldstructure while rotating the same by. the action of a stream of fluid under ressure.

2. The method of rotating a mold-structure about ain axis out of theve'rtical, in a centrifugal casting apparatus, which consists in rotating and cooling the mold-structure by confining and directing a stream of fluid under pressure so that such fluid' passes into contact with the mold-structureV at an angle to the axis of the mold and substantially tangentially to the outer periphery of the mold-structure.

3. The method defined in claim 2, wherein such stream is so confined and directed that it impinges against the mold-structure below its axis.

4. The method-daada@ claim 3, wherein.

such streamis so confined and directed'after impinging the mold-structure, that the stream fiows around the outside of the moldstructure for a portion ofits circumference.

5. The method defined in claim 3, wherein lsuch stream is so confined and directed after impinging the mold-structure, that lthe stream flows around the outside of the moldl-structure for more than one-half its circumference.y

6. The method defined in claim 3, whereini such stream is so confined anddirected after impinging the -mold-structure, that thc 'stream flows around the outside of the moldstructure for practically its entire circum'- ference. f

7. The method defined in claim 3, wherein such stream is so confined and directed after impinging the mold-structure, thatrthe stream iows around the outside of the moldstructure for a portion of its circumference in a stream of gradually increasing crosssection.

8. In a centrifugal casting machine of the 'horizontal mold type, the combination with the mold-structure, of a structure loosely surrounding the mold-structure, such surrounding structure being provided with Va fluid inlet approaching the mold-structure a below its axis substantially tangentially, a

recess following the curvature of the outer periphery of the mold-structure intermediate the ends of thev mold-structure, and a fluid discharge outlet leading from said recess.`

v 9. In a centrifugal casting machine ofkthe l horizontal mold type, the combination with the" mold-structure, of a structure loosely"- l fluid inlaet approaching the mold-structure surrounding the mold-structure, such surrounding structure bemg provlded w1th a below its axis substantially tangcntially, a

recess following the curvature/of the outer periphery of the mold-structure intermedil ate the ends of the mold-structure, and a plurality of fluid discharge outlets leading l from sald recess, one adjacent to each end of the mold-structure.

-the fluid -inletto the fiud outlet.

12. lThe apparatus defined in claim 8, wherein the exterior of the mold-structure and the interior of said surrounding structure, at one side ofthe recess, are bothlprovided with alternate annular ribs and re- .cesses, with a rib on one part seated in a recess on the.' other, to prevent discharge of the fluid except by wav-of the outlet while avoiding the use of gaskets between the mold-structure and the surrounding structure. Y v- 13. The apparatus defined in claim 9, wherein the exterior'. of the mold-structure and the interior of the surrounding structure, at opposite sides of the Trecess,\ are both provided with alternate annular ribs and recesses, with a rib on onepart seated A in a recess on the other, to prevent discharge of the fluid except by way ofthe outlet while avoiding the use of gaskets between" the mold-structure and the surrounding structure. y

14. The a paratus dened in claim 8,

wherein the ischarge outlet includes an annular chamber in the surrounding structure having a part overlapping and in'open communication with the recessatfa *point removed from the connection between the recess andthe inletand also includes a discharge conduit leading from the chamber.

15. In a centrifugal casting machine of the horizontal mold type, the combination vwith Athe mold-structure, of a structure formed and arranged to include journaling means for the mold and to confine a cooling liquid and maintain said liquid in contact with the exterior of the mold-structure during rotation, the exterior of the-.mold-'structure and the interior of the llast mentioned structure being povided with a rib and a recess, with the rib on one structure seated in the recess on the other, to Aprevent discharge of the liquid between said two structures while avoiding the use of gaskets between such structures.

Signed at New York, jin lthe county of New York and State of New York.

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