US2107322A - Centrifugal casting machine - Google Patents

Description

Feb. 8, 1938. A. G. ANDERSON ET AL.

CENTRIFUGAL CASTING MACHINE Filed May 3, 1937 4 Sheets-Sheet 1 we. Q QW E 1 fr' m, Q uf .MA mul 9v .Mmf/ML d @ig-we ilmwwl... m {Ii w m Pk d mes I Add Feb. 1938. A. G. ANDERSON ET AL. 2,107,322

CENTRIFUGAL CASTING MACHINE 4'Sheets-Sheet 2 Filed May 5, 1957 L K e qyioYTORNEY.

Feb. 8, 4 A. G. ANDERSON ET AL. 2,107,322

CENTRIFUGAL CASTING MACHINE Filed May 3, 1957 4 SheefbS-Sheerl 5 A TTORNEY Feb. 8, E938. A. G. ANDERSON ET AL 2,107,322

' l CENTRIFUGAL CASTING MACHNE Filed May 3, 1957 4 sheets-sheet 4 v| l l l I I dop G, A @M Libbe .4 TTORNEY Patented Feb..v 8, 1938 UNITED s'ATl-:s4

PATENT @OFFICE Y amm i oEN'rarr'UGsn cas'rmo moms AAdolph G. Anderson and James I. Kibbe, Mucket0n, Michqwsssignors to'Cainpbeil, Wyant Cannon Foundry Company, Muskegon Heights, ,Miclm s. corporation of Michigan application Mays, 1931, sensi No. 140,368

- 12. Claims.

` and have substantially perfect inner andl outer cylindrical surfaces after machining.

It is 'a primary object and purpose of the present invention to provide a machine for the use stated, and by means of which the cylindrically cast sleeves may be produced in quantity and with economy, the molds in which the sleeves are cast being quickly introduced into the machine and clamped and held therein, thereupon the molten iron may be poured while the mold is revolved, and after the casting operation has been completed, the mold with the cast sleeve therein .re

.moved for the insertionI of a succeeding mold.

Many objects and purposes and structure to attain the same are provided, including novel means for securingl and clamping the molds in the machine; means for compensating for expansion caused by the high temperature of the molten metal, novel means for air coolin'g the machine as it is operated, and many other novel constructions and arrangements of' parts, all of which will appear and be understood fromthe follow-x ing description, taken in connection with the accompanying drawings, in which,

Fig. 1 is an elevation and longitudinal central lvertical section through a machine for centrifugally casting elongated cylindrical sleeves. in

through the left-hand portion of the machine shown in Fig. 1, andwith the closure memberfor holding the 'mold in place swung .partially -outward, and

Fig, is a transverse vertical section. substan-v tially on the plane of lines B-S-of'lligs. .1 and l3, looking in the direction indicated by the arrows.

Like reference characters refer to like parts in ,the diii'erent figures of the drawings.`

' In the construction of the machine a vertical supporting casting I is provided at one lside oi which is an integral horizontalbase 2.- An electric motor 2 is mounted upon a carrying table l above the supporting casting I'. fromwhich table a verticalpost l5 extends downwardly through a sleeve 6 while a pin I attached to the' table l 2| is rotatable with the shaft ment about the axis of the post i. The. post i is equipped with rack teeth at one side meshing withl which is a gear l carried on a shaft which may be operated to .adjust the motor vertically to different positions. 'I'he motor shaft has a ley 9 around which an endless belt I0 passes, he beltv also passing around a driven'pulley II secured at the outer end of the main shaft I2 of themachine. The shafting of the belt is for the purpose of changing the speed of the motor shaft and the belt may be tightened to the desired degree by operation of the shaft carrying the gear 8. A brake Il is associated with the shaft I2 and is tightened by swinging an operating cam .I5 to the left (Fig. 1) through the horizontal movement of a rod I8 connected to the cam member I5 and which is connectedto anarm I1 pivotally mounted at one end on the supporting casting I`, and with which is associated a hand lever I8 to apply the brake and stop the shaft I2 at the end oi a casting operation.

The shaft extends through and is mounted in suitable bearings I9 and 20 carried bythe supporting casting. At its end and extending over the table 2 a mold receiving and holding housing is positioned, preferably cast integral with the shaft I2. Such housing is'of cylindrical form,

, as indicated at 2| (Fig. 4), and has three spaced apart continuous annular ribs 22,. 23, and 2l, the

first of which is intermediate the ends of the cylinder, the second at the open end and the third adjacent the end where it joins with the shaft I2 (see Fig. 3). Longitudinal radially extended and spaced apart vanes 25 extend between-and are integrally connected with said annular ribs. An end 21 to the cylindrical housing integrally joins the wallsof said housingwith thev shaft I2 and through this end'a plurality of openings 2Q are made for air passage; 'It is apparent that the cylindrical mold holding and Iczarryingmember A' cylindrical cover. 30 of suitable thin metal is located around` the mold carrying housing described, being connected at one fend portion to a.

' l .ring 2| which in turn is bolted to the supporting casting I. Atits opposite end a substantially continuous annular trough member 32 is located to -which a similar ring of angle iron cross section 33 is bolted at one flange, the other flange having .a fixed connection to the outer e'nd of the cover Il. This member 32 rests' upon the outer' portion of the base 2. At its upper side it ha'sa hollow branch u which formsI an outlet for air which circulates within the enclosedcover 30 -during the operation ofthe machine. the air being drawn through suitable openings, as indicated atzlla in Fig. 3 made near the-lnnercnd of the'cover 8l. y.

Atfthe open end of ,the housinsr 2I a ring ll is bolted has a horizontally projecting mnular flange yat the outer side of which a plurality of screw threads II are cut. said threads preferably being square threads, though not necessarily so. 'Ihe inner side of the ring is provided with a conical surface 31 which tapers inwardly as shown. l

The drive shaft I2 is hollow extending nearly through which is a rod or shaft 3l.' As shown in Fig. 1, the-right-hand end of the shaft bears against one end of a coiled compression spring 29 which is disposed within the hollow drive shaft I2, .the opposite end of the spring bearing against an adjusting screw which extends through a vscrew cap 4I threaded onto the end of the drive shaft I2, an' adjusting and locking nut being screwed onto the outer end of the adjusting screw 40 as shown. It permits the tension of the spring e 2l to be adjusted. Bald spring vhas a tendency passages therethrough andf` which has a cylindrical dange 48 continuously around the same a'nd bearing against the inner sides of the cylindrical mold carrying housing 2l; The inner sides of 1 the flange are of conical form, as shownv at 41,

tapering ir the same direction Aand at substan-.

- tially the same inclination as the inclined conical surface 21 on the ring II. The end portion of the rod or shaft Ilja) which the head 44 is connected is bored longitudinally for a distance receiving a coiled compression spring 43 therein,V and also a rod 4| one end of which bears against said spring. 1herod49 extends outwardly beyond the end of the' shaft and has a circular plate secured thereto through which` are air' e. II.v lThe plate Il has a vertical outer face as shown. It is evident that the rod 4I and the plate Il attached thereto may have a `limited horisontal movement relative to the spring". In11*lg.1 a pin -and slot is indicated? to limit the extent ofsuch movement.

Themold used is formed within a cylindricall tubular flask l2 to the oposite end portions of vwhichai'e disks Il and I4, permanently secured.

the per'lpheraiedge portions of which are conical 'surfaces corresponding with conical surfaces 41 and. -I1, respectively. The lmold Il is of sand u located withinthe flask I2 and has a cylindrical' mold' cavity into which `molten iron may be de- 'I'heinner end of Athe mold is thickened radially as shown in Fig. 1 and at the outer end of the mold is a disk-like core Il, the outer ver-m tical face of which lies flush with-the enti, 'of the' iiask l2. l ,f Horizontal lugs Il. (Figs. 2 and 4)f extend from the member 22)"on which a drum-like closure member is pivotally mounted to swing about a vertical `axis. Said member comprises a'cylindrical ange l. and an outer web i9A in the cene tral portion of which is a circular opening. A

ring having screw threads Ilia4 at its inner side is mounted within the flange 58 and connected with the web 59 by bolts4 0I which pass through the webvand ring. Compression springs I2 sur round the bolts between the inner side of theweb Il and said ring 60, the tendency of which is to move the ring inward'until' stopped by the nuts on said bolts.

A floating member is mounted upon the closure member and within the same, having a cylindrical flange i3 which passes through the central opem/ ing in web 69, integral with which flange is a web' Q4. A continuous annular rib is cast integral with and-extends from the drum 63 to which a ring N is permanently secured by bolts or screws (Fig. 3). The ring 66 at its outer periphery is provided with square screw threads 61 adapted ,to coact with thethreads 80a on the ring 6I. At its inner side the part thereof projecting inwardly from the rib 65 is interiorly threaded., as at Il with threads of the same size and character as' the threads 26 on the ring 35. A ring 69 provided. at its outer periphery with continuous gear teeth is secured to and located around the drum 63. A

, sleeve 'III having a longitudinal passage 1I therethrough is formed integrally withthe'web 59 through'which passage a shaft 12 `equipped with 4gear orpinion teeth 13 at its in'ner end may pass,

the teeth 13 meshing with the gear teeth on the ring 6I, whereby the floating member may be rotated about its horizontal axis. At the inner edge of the flange 58' of the drum closure member a loeating plug 14 ismounted (Fig. 4) adapted to enter a .guide recess 15 in the member 22 when the closure memberis swung to closed position. A

bracket 10 is connected with said ange 5.3, on 30` which is mounted a pivoted lever latch 'I1 for releasably engaging with a keeper 18 ,on the member/32 as shown in Fig. 4 to clamp the closure member in the closed position shown in Figs. 1 and 3. The motor may be v controlled by switch buttons such as shown at 19 on the outlet at 24; The core 56 and the web 64 ofthe floating memtrance vof molten iron into the mold.

in Fig. 4, the oating member has been operated lber described have central openings l0 for en' I so that it is at its outermost position, and the ring I is in screw threaded engagement with the ring 40. The closure member may be swung to wide open position, anda mold with its surrounding flask, consisting of the sand mold ll, .the ilask l2 and the members I3 and\ I4 at itrsl ends inserted within the housing 2l. The mem ber/i3 engaging ilange 46 will serve tog centrallylocate Ithe inner part of the mold and together with the inner end of the mold bears against the plate ll, while the forward member M at its con7 ical peripheral edges engages with the `conical surface at 21.v v Core It is placed in the outer end o f thje flask and the closure member is then swung toclosed position and latched. The shaft 12f is inserted through the passage 1i and the pinion- 'Il engaged with the gear teeth of ring 6l. Then by rotating the ring in the'proper direction the threads n wm connect with the threads n and the oating member be moved horizontally to the position shown in Fig. 1 or 3, and push the niold andsurrounding flask aheid of it until the outer peripheral conical surface of the member 54 isl I with its connecting member moved. with a resultant compression of the spring I9.

vWith the parts in this position or as shownin Figs. 1 and `3, the mold is then ready to rel ceive molten iron.

' The motor is started in operation driving the i shaft I2 and the connected parts at high speed of rotation about a horizontal The floating member has a bearing inthe opening in the web at 59, and rotates with the cylindrical housing 2Ly -The molten iron is poured through the openings l into the mold and the rotation isy sumciently high that the molten iron, through centrifugal action, spreads evenly over the inner sides of the lui as in Fig. 4. Thereupon, the latch 'Il may be rel leased from the keeper 1I, the closure swung to open position and the flask, mold therein and the sleeve cast within the mold removed from the machine. The succeeding Voperation is a repetition of what has been described, and the operation may be repeated as many times as desired for the production of a plurality cast elongated sleeves. y Y

'Ihe rotative speed of the shaft I2 varies with the casting of'diil'erent diametersof sleeves. It

is apparent that the flask, may be of a diil'er" ent diameter in which case the radial projection of the members 53 and Il outwardly from the ends of the flasks will be reducedA or increased. Forv the larger sleeves a rotation of 1200 R. P.- M. may be sumcient and for smaller sleeves the r'oased 3 tation mayrbe incre to as'high as 600 R P around each end of the cylinder and secured M.; but in any case the rotation must be at a high enough speed that tlie'l molten metal is spread out evenly over the entire inner cylindrical surface of the mold. i'

During the rotation,v 'the an structure compris-- ing the severaly annular` ribs 22,23, and 24 and the horizontal vanes. 2l induce a current of air and also throw'the air'outward'due to centrifugal action, causing a now of air toward the member 3.2 to escape Athrough the outlet at 3l. Air may pass through the es Il, Il, and Il length- `wise of the sleeve which i's being cast and heated air likewise passes through the slots 2l outwardly. the inlet of atmospheric temperature air being through' the openings 3io. e

With the structure described the entering of a flask and mold and the removal of the ask, mold and vcasting therein israpldly accomplished. Thelongitudinal expansionof the flask by reason of the great increase in temperature which occurs when the high. temperature molten iron is put into the mold isl compensated' by a yielding lo'ngitudinal movement of the rod or shaft Il with a further compression of the spring 3l. The floating mount of the'vring-IU on the bolts Il, together with the springs il acting on vsaid, ring permit yielding of the ring when required as the noating member with the ring-Il attachedfthere-I to comes into contact with the ring Il on closure of the closure member: Rapid production of cast iron alloy sleeves is had. The sleeves, because of the high temperature of the molten iron used, which may be a' temperature above 2700? F. are oi high quality, the metal is homogeneous throughout without defects, and-,the free carbon in very iinoly divided form is' thoroughly one homogeneously disseminated through the casting,

permitting the casting to be machined accurately and to a relatively thin cross section. f

' thereof being of tapered form, a yielding memconicalsuriace at the outer end of the flask' vthereby centering the flask and holding it nrmly in the housing, as specified.

of. centrifugally A and is to be considered comprehensive'of all` forms of structure coming within their scope. We claim: v l l. In a machine, of the class described, a r0- tating cylindrical housing adapted toireceive an/ elongatedflask enclosing a nold therein, a flask comprising a cylinder and a disk at each end secured thereto, the peripheral edge surfaces ber at the inner end of said housing including a cup-like endhaving inner sides with' surfaces of conical form corresponding to the peripheral surface of the annular disk at the inner end ofthe nask, said cylindrical housing at its outer end having an inner conical surface corresponding to the surface at the periphery of the disk at the outer end of theiflask, and means for forcing said`iiask with the mold therein inwardly until v' the outermost disk at its edges engages with the 2. In a machine ofthe class described, an elongated horizontal cylindrical housing open at its outer end, a rotatable hollow shaft to whichl the opposite end of-said housing is connected, a second shaft extending through the hollow shaft,

spring means tending to move said second shaft into said housing, a member attached to the end of said second shaft'within said housing of cuplike form and having inner tapered sides, a member connected to the outer end of the housing likewise having innertapered sides, a' ask .comprising an elongated cylinder and a disk located thereto, said disks having conical peripheral sur-` facesadapted-to coact with the tapered inner sides of 'said members attached respectively to the second shaft and tothe outer end of the housing,

a rod extending partially lengthwise of the second shaft, spring means acting thereon tendingto move said rod into said housing, a plate hav-v ing a vertical outer face ofan area greater than the area of the end ofthe ilask connected to the rod within said housing, and closure means adapted to be movedinto a po'sition to age with the outer end of said flask and inovev e saine longitudinally against the yielding resistance of said spring means and until the disk atthe outer end of the flask comes lintro snug ensagement with the member attached to the outer end of said housing.

- from, avclosure member/hinged thereto and cuntos to be swung into closing position against the outer endet the flask or to open 'pt isitio'n.j and a manually operable floating member mounted on said closure member and operable to engage with the outer end of the flask and force the same` into position, said floating member 'having an opening therein' for thepouring of 'molten metal into said mold.

4; A oonstruotibn containing the elements in" lcombination 'defined in claim 3, comblnedwith yielding means resisting the inward ,longitudinal movement of the flask, and coacting means on the housing and the flask for centrally locating the flask in the housingwhen it has been moved to its innermost position.

5. In a machine of the class described,` an

-Y about a horizontal axis, an enclosure surrounding the housing and spaced therefrom, `a closure member hinged thereto adapted to be le'asable held in closed position, a noating member mounted on said closuremember for rotation and for bodily movement in a horizontal direction, means for rotating said floating member, interengaging threaded means on the' floating member and said housing for connecting the same together on rotation of the iloating member in one direction, and interengaging threaded means on the closure member and said floating member for connecting the same together on reverse rotation of the floating member.

'6. In a machine of the class described, a rotatably mounted elongated cylindrical housing', means for locating and centralizing an elongated ilask with a mold therein in said housing, a surg rounding enclosure around the housing, said enclosure at its outer endv having an air outlet and said housing having air passing openings for circulation of air on rotation of the housing and for forcing the same outwardly through said outlet, there being air entrance openings into the space between said housing and enclosure there'- for, a closure member hingedly mountedl on said enclosure, means for releasably securing the closure member in closed position at the outer end oi' the housing, a floating member mounted within said closure member for rotation and for horisontal movement inward or away from said housing, manually operable means for rotating said closure member, an interiorly threaded ring within the closure member, a cylindrical member both interiorly and exteriorly threaded connected to said floating member, and an exteriorly threaded member connected to the outer end of the housing, said member attached to the floating member screwing thereon when rotated in one direction and screwing into the ring carried by` the closure member when rotated in the opposite direction.

'1. A rotatably mounted cylindrical housing- ,open at Yits outer end, an exteriorly. threaded member secured at the open end of said housing, a cover surrounding the housingand open at its outer end, a closure member hinged to said cover and adapted to'be swung to closed position, means for releasably latching theclosu're member in closed position, an interiorly threaded ring position or to open position, means for releasably v latching the closure member in closed position, a iloating member rotatably mounted within said closure member, means on said iloating member, means on said closure'member and means on said housing whereby said floating member on rotation in one direction connects with the housing and bears against the flask to move it to innermost position to move lwith the housing on rotation thereof, and upon rotation of. the closure member in the opposite direction disengages from the housing and connects with said closure member to swing therewith to open position.

9. An elongated cylindrical ilask, a disk connected to and surrounding veachend portion of the flask, said disks having conical peripheral surfaces, a mold within the flask, an elongated housing open at one end to receive said ask and mold -which may be moved longitudinally into said housing, said housing adjacent opposite ends having conical interior surfaces to engage with said disks on the ask and means for pressing against the outer end of the ask and forcing the outer surfaces of the disks and housing into engagement with each other to thereby centrally locate the flask, said means closing the outer end of the ask and having a molten metal pouring opening therein, and a plurality of annular ribs around said housing having a plurality of longitudinal vanes therebetween. y

10. In a machine of the class described, an elongated horizontal rotatably -mounted cylindrical housing having anopen outer end for entrance of a flask and mold1 therein and a plurality' oi holes "through its closed inner end for the passage oi' air therethrough, a cylindrical iiask with mold therein centrally located in said housing, means for closing the inner end of the ilask, means adapted to detachably connect with the outer end oi' the housing to close the outer end of the flask and having a molten metal pouring opening therein, a moyably mounted supporting member and means thereon with which said last mentionedmeans is connected upon disengagement from said housing.

11. A construction containing the elements in combination defined in claim 10, combined with manually operable means for moving said closing means for the outer end oi' the flask to selectively connect the same either with vsaid supporting member or the outer. end portion of the housing.

tially'cylindrical housing open at its outer -end, a cylindrical ask with-a cylindrical mold therein located within' said'vhousing and insertable thereinat the open end of the housing, yielding means within the housing against which the inner end of said ilask engages and which yields and moves'upon the 'application of a'predetermined pressure against the outer end ofthe flask,

' locating means on the ends of the iiask, on thel outer end oi' the housing and on said yielding means for centrally locating the flask and mold within the housing upon the application of said pressure against the outer end of the flask, a de'- tachable' closure for the outer end of the hous-v.- ing screw connectable thereto, and means for manually rotating said closure, said closure member having a molten metal' passing opening therethrough for pouring molten metal into said mold. v

. ADOLPH G. ANDERSON.

JAMES I. KIBBE.

v 50 12. In a machine of the class described,a hori- .sontally positioned rotatably mountedsubstan-

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