US1466309A - Lowby - Google Patents

Description

Aug. 2g, w23. www@ E. .J1 HHQYl Anz' 0F momma Filed mb. 1e, 1921 "2 summa-simi .1

ff. W

dum nllgg Figures 6,

,i sterne unirono renne newer, er scorn Bunn, rumene, nssreuon 'ro onrvnn ennemie rnow wenns, or scorn nnnnnunmun.

ART 0F HOLDING.

Application tiled February le, 1921. Serial No. $416,159.l

To aZZ whom t may concern.

Be it known that ll, EDMUND ql. Lower, u citizen ot the United States, und a resident of South Bend, in the county of Suini; Joseph and Stute of Indiano, have invented certain new end useful Improvements in the Art of Molding; und l do hereby declerc the following to-be e full, cleer, and enactdescription of theinvention, such es will enable others skilled in theert to which it e. erteins to make und use the seine.

his invention relatesl to improvements in the nrt of molding or costing end 'to improvements in permanent two-part molds und meens for manipulating end controlling the operetion of the seme,one object of the invention being to so construct e molding epperetus of the type specified thet the speed of its operetion in the making of castings of .e high degree-o perfection shell be enhanced.

A further-object is to so construct the moldino apparatus es to `avoid liability of injuryY thereto durin the cesting or molding operetions und whic will .else reduce to u minimum imperfections in the custings A further object is to provide meens for melting plow points und vshores having chilled edges so that the chilled portion of the edge shell be unitorm, end so thet e menimum degreevot strength und herdness shell be ohtuined in the share or point, thus resultingyin enhancing 'the longevity oil the seme.

With these und other objects in view, the invention consists in certuin novel tentures of construction end combinations of ports es hereinafter set `berth end pointed out in the claims.

ln the accompanying drawings; Figure l is e side elevation ot e molding eppuretus illustrating en embodiment oif my invention und showing the mold members closed; Figure 2' is e similar view showing the mold members open or sepereted; Figure 3 is e plan view with the mold members in closed position; Figure d is en end view; Figure 5 is en enlarged regmentury sectional view on the line 5-5 of Figure .3; 7, 8 und 9 ere views ot the mold members, end Figure 10 is u view illustretor dies ing e portion of u plow share or point es molded in the apparatus.

l re resents e, table or supporting frame on which the apparatus is mounted. Angular bars'Q, 2 ere secured upon the table and suitably s uced `eport in parallel relation to euch ot er to receive the members 3 and 4 of 'e' permanent mold between them. The mold member 3 is loosely ivoted near its bottom es et 6 to the ' ung e bers 2, 2 end sold moldmember is rounded es et 5 so that it muy turn or tilt on such pivotal connection. The angle bers 2 ere notched to form inclined edges 7 lund the mold member 3 is provided on its side portions with shoulders 8 which muyrest on the/ inclined edges 7 ywhen the mold member is tilted und thus limit the tilting vmovement of seid member und hold it in tilted position.

At one end of the teble or treme l, en abutment 9 is provided for the pivoted mold member 3 und from said ebutment, arms 9a reject for guiding seid mold member.

he mold member 4l is mounted to slide on the table between the guide bers 2 `und the table muy be provided with en opening 10 through which the casting mey be discharged.

The sliding mold member l is moved towerd und ewey from the mold member 3, by ineens of e. motor loceted upon thetreme or teble 1. rJFhis motor comprises u cylinder ll having e, suiteble piston therein, und the rod l2 of this piston is connected with e cross heed i3 secured to the mold member l. A U-sheped pipe 1li is connected with ports et respective ends oie the cylinder ll, und et u convenient point between the ends of this pipe, e vulve l5 is located und constructed to direct compressed sir (received trom uny suiteble source oit .compressed nir supply communicating with the cesin of seid vulve) to one or the other end ot the cylinder for causing movement of the mold member l in one direction or the other., llhe operation oi the. vulve l5 is controlled by the melder through the medium oil tootopereted lever mechenism. This mechanism comprises e foot lever 16 pivotelly supported et i7, e rod 18 pivotully connected to one end of seid lever, und en erin 19 se drawn, as shown in Figure 2. lin order to facilitate such operation, the pivotal connections between the parts constituting said lever mechanism are made loose, llt is evident that when the molder depresses the free end of the foot lever, the arts constituting the lever mechanism wil 'be moved from the positions shown in Figure 2 tothe positions shown in Figure l; the valve l will be shifted and the motor will operate to move the mold member to and against the mold member 3 as shown in Figure l. llt is equally evident that when the melder releases the foot lever, the parts of the lever lti mechanism will at once assume the positions shown in bFigure 2, shifting the valve l5 and eecting separation ot the mold member l from the mold member 3 as shown' in Figure 2, to release the casting and permit to escape through the opening in the trame or table l,

Motive duid other than compressed air may be employed for operating the motor .but l prefer to employ a compressible duid es the same will act,inot only to move the mold member 42 relatively to the mold member 3, but it will also serve os yielding means for sov holding the mold member l during the molding operation that it may yield to expansion ot the metal and avoid necessity for the use of' other means for connecting the mold members either hxedly or yieldingly,

Referring now more specioally to the mold'members 3 and t, it will be observed las indicated in Figures 5, 3 and 9) that each ci said mold members is provided with a chamber or jacket to receive a heating media which may be conducted thereto from any convenient source of supply, by pipes indicated at 2l.

ln the embodiment of my invention shown in drawing, the mold member 3 is shaped to provide a female die 22 for a. plow share and the mold member l is shaped to provide the male die 23,--these dies cooperating when the mold members are broughttogether to provide a mold cavity, the diameter of which is so reduced at and near those portions in which the cutting edges of the share or point are cast as to facilitate chillin of these parts. llihe respective mold mem ers are made with channels 2t which cooperate to provide a pouring gate which is o en at its upperend and .extends under an communicates with the bottom ot the mold cavity, preferably at two points, as indicated in the mold caviy reeaeoe Figures 7 and 8. 'llhe respective mold members are also provided with vertical channels 25 which extend to and communicate with to provide for a riser from the casting. ach mold member 3 and 4c is made with a channel 26, wherein another riser may be formed on the body portion of the casting. ln order that the share shall be provided with a bolt hole, the mold member 4l is provided with a hole 27 and a tube' 28 exten ing across the chamber 20, 'to permit the insertion of a suitable core.

rllo facilitate the ejecting of the casting when the mold members are separated, the devices now to be described may be emploiyed,l A hole 29 (Fig. 5) is made in the mo d member d in position to be in line with the base portion of the riser` formed in the channel 26, and a tube 30 (having greater internal diameter than the diameter of the hole 29) passes vthrough the chamber 20 in said mold member and communicates with said hole. A rod 3l passes throu h the tube 30 and is adapted also to pass t hole 29 and to have frictional with the mold member 4;-, Ilhe rod 31 passes through an opening in a bracket 32, secured to the motor cylinder ll, said rod being provided with a head 33 to engage the bracket when moved in one direction or the cylinder ll. when movedjn the other direction,a l/Vhen .a share shall have been cast between the mold members and the mold `n'iembers Il is caused to move .awayV from the mold member 3, the rod will move back with the mold member e until the head 33 on said rod strikes the cylinder il., Further bach ward movement of the member e, will cause the rod to engage the riser V(formed in the channel 26) on the casting and tree the latter, permitting it to drop through the openi ing 1G in the table. should be explained at this point however, that when the mold member t moves away from the member 3,`

the latter will tilt forwardly and free the casting therefrom.

F or casting a plow share or point having a chilled. cutting edge portion, with the use of my improved apparatus, i may employ iron ot any of the lrnown grades, such as foundry iron l, 2, 3 or charcoal iron, or Bessemer iron, and in this iron l incorporate a chilling mixture comprisin the following ingredients, in a proximate y the relative proportions state ,-viz, silicon 2.40 to 2.70 per cent, sulphur .O6 to .l5-per cent, phosphorus 20 to .250per cent, andvmenganese .50 to .85 per cent. @r li might modify the chilling mixture as followsf-silicon 3.50 per cent, sulphur ..06 to ,i5 per cent, phosphorusy .3,20 to .250 per cent and manganese L00 per cent.,

fr plow share or point cast with the use of iron containing the chilling mixture above mentioned, in. the mold cavity formed rough the connection Elli - incapace,

by the permanent mold members hereinbel fore described, will result in a substantial share or point 34 (Figure 10) having its cuttin edge portions'v uniformly chilled, (the chi ling occurring in that portion of the mold cavity, having the reduced cross section), and extending an appreciable distance f back of the cutting edge er se as at 35 and appreciabledistances on oth sides or faces of the share or oint as shown at 36,',leaving a ll-shaped une illed portion 37 extending down into the chilledl portion -36 to an extent limited by the analysis of the metal and the shape of the cuttin edge portion of the share or point and t etemperature of the mold. A plow share or Apoint is thus produced, which notonly has, a 'uniformly' chilled ed e, but which is strong and hard and capa le of successfully withstanding long usage.

lf deslred, in order to add strength to the share, nickel, chromium, titanium, vanadium or other such elements may be alloyed with mitted into the chambers 20 of the mold members for heating said members to prevent the formation of shot metal 'and to prolong the lite of the mold members by eliminating quick expansion when the metal is poured." After the first casting shall have been made, mixed water and steam will be admitted into the chambers 20 of the mold members to maintain a constant temperature.

After the mold membersshall have been brought together' as above described, the metal will be poured through'the gate and will be conducted .to the bottom of the mold cavity, gradually rising therein until the same shall become lilled and the metal lappears in or extends through the riser channels. The operator will then immediately release the lever 16, thus causing reversal of the motor and theconsequent separation ot the mold members andthe .discharge -or ejecting of the cast share in the manner previously explained. 4

lt will be observed that no latching means are emplo ed tor-holding the mold members together, ut that the air motor serves to properly hold the mold members together. This air motor forms a yielding .holding means so that should sudden expansion of the casting occur, whether such casting be a plow share or other object, such suddenl eX- pansion would be compensated for by the yielding cushion afforded by the air motor.

Various changes might be made lin the details of=invent1on without "departing Mfrom the ,spirit'thereof or limiting its scope and hence l do not wish to restrict myself vto the recise details herein set forth. I

aving fully described my invention what lclaim as new and desire tosecure by 1. ln a molding apparatus, the combination with a support, of a permanent mold member'pivotally mounted on said support and adapted to tilt, a second permanent vmold member mounted on said'support to move' toward and away vfrom .the pivoted mold member, means for moving said sec- 0nd mold member., means for controlling said moving means, and means carried by the said second mold member and operable automatically to free the casting when'the mold members are separated.'

2. ln a molding ap aratus, the combination with a support, el) two permanent mold members mounted thereon and one movable relativelyto the other, means for moving the movable 'moldfmemben means for controlling moving means, a rod assing through the movable member and trictional connection therewith so as to be movable with and also independently ot the movement of said movable mold member,

and stop means for controlling the movements of said rod, whereb operate automatically to be prevented from entering the mold cavity when the mold members are closed `against each other.

-Sll

'aving v said rod willl ree the casting when 'the mold members are separated and, w@

3. ln a moldingv apparatus, the combina- Q tion with a sup-port, of two permanent mold members thereon and one movable relatively to the other, of a motorv connected with the movable mold member, a rod passing through vand having frictional connec'n tion with said movable mold member, a head on said rod, a bracket secured to the motor and through which said rod passes with the head lthereof between a part of the bracket and said motor, and means for controlling the o eration o' the motor.

Ll. n molding apparatus, the combination with a support, of two permanent mold members mounted on said support, one of said mold members being movable relatively to the other, a duid pressure motor connected with the movable mold member, a

les i valve for controlling the supply ot duid to members separated 'from the other and to move the valve to such position to -edect separation of the mold members.

5.. Molding apparatus comprising two v menganese in .the relative pi'epoiiens enmie-l Meme@ permanent mold members, each heving e, cheminer, ineens. Whei'eby heating iiuieimay be inmeziuced inte seid ehnmber seid meid membei's eoopemting ifo form e meid cavity having a ieeinced cross section nem* sin exige poi-tien thereof, sind means im' eeezcing movement ef ene ei said meid membei'e neiativeiy te the einen.

6. The herein describe/dimmed of mez-iiing e plow Share er point having n, ehiiied cutting edge peitieny censisiing in (insti-ng seid siime en point between permanent meid members farming e, meid eeviy having neduced cross section Whee seid @uiting edge camions are east, with bhe use e iron een taining siiicen, snipinn7 phesphoine and stentiaiiy es speeied.

i. The heiein deseiiberi method of nini ing e, pievi shane er point having e, chilled cutting edge pentium, censisising in penning inte n suinbiy shaped cavity of n jeeieifee er ehembeieei metni meid, n ehiiiing iron emitiens.

eiiey end discharging int/e the jeeketefi o1" ehem ered pensions ei? the meid, mixed We ier and stemmi.

8. The herein desei'ibed methed nieking e. Diaw-ehm@ or peini havin chilled eufqing edge pmfien, consisting in iseherging steam into the ehembeis m inekepei bei or jeeket pei'iens end @mining the Seme thenein during subsequent melding epiin 'etestimeny *Wffieceeif9 have signed eine speementien in the presenee @we enb- `seiiioing Winmegsseeo EDMUNTU JAMES LQVVRY. Witnessesz Been E ififinnnnen, JnNmn M, @wie

Images