US1086824A - Molding apparatus. - Google Patents

Description

M. J. HEWLETT L H. L. DBMMLER.

MOLDNG APPARATUS.

APPLIOATON FILED 0ST.

Patented Feb. 10, 1914 M. J. HEWLETT a H. L. DBMMLERl MOLDING APPARATUS.

APPLGATION .FILED OGT.5.1908.

1,086,824, A Patented Feb.10,1914L M. J. HEWLETT 2. H. LA DBMMLER.

MOLDING APPARATUS.

APPLXGATION FILED OCT. 5, 1908.

1,086,824. Patented Feb. 10, 1914 6 SHEETS-SHEET 3.

rfz/JTNESSES: Y JNVENTQRS:

M. J. HEWLETT L H. L. DEMMLER. MOLDING APPARATUS.

APPLICATION FILED @015.1908

1,086,824, Patented Feb. 10, 1914.

` /w s SHEETS-SHEET 4.

l Hy

WIVNESSES Y BY ` @07 v AYTQRNVV El. J. HEWLETT a H. L. DEMMLER.

MOLDING APPARATUS.

APPLIGANON ULEB 0015. um

1,086,824. Patented Feb. 10, 191%l dm if INVENTOR'S .1.. l qfml/emyLemmZcr,

49,1%@ ,1, 1 .ff fn# ATTORNEY UNITED STATESl PATENT oFFioE.

)uoLmNG APPARATUS.

.Specification of Letters Patent.

Application filed October 5, 1908. Serial No. 456.320.

Patented Foi). 1o,1914.

To all 11b/wm. 'it may concern Be it known that we, Mannini d. l.li:\\'- Lirr'r and HEX nv L. Dnwiviniu. citizens of the linited States. and residents ot Kewanec. in the county of Henry and State of Illinois, have invented certain new and useful linproveinents in Molding Apparatus. of which the tollowintiy is a specification. reference bcin;r had t-o the accompanying drawings.

Our invention relates to the moldingl ot' sand or analogous material. either in the? forni of cores or in making molds. and vthe present application has to do particularly with apparatus for so molding sand or analogous material.

The 'invention relates to a machine in which sand or analogous material is forced into a flask and packed around or into a paitern by compressed air or other fluid. and in which further packing of the sand or analogous material is ctl'eifted by jarring the flask by interinittentliraising the flask and con tents and allowing the same to drop and solidify by gravity coupled with theshock itl receives on being arrested.

A further objectot the invention is to providc an apparatus of this character, equipped with fillingjdevices adapt/ed to be brought into and out of charging relation with the flask. aud capable of enabling the latter to be filled and conveniently removed after filling. thereby'v making a place for its sin cessor and enablingr the. machine to lie con-- venientlv operated.

ll'it'n these and .other objects in view. the

invention consists in the construction :ind novel combination of parts hereinafter tiillv described.l illustrated in the accompaiiyn,"r drawings, and pointed out in the clainis hereto appended; it being understood that izii'icus changes in the torni. proportioiusize and minor details ot construction. within the scope of the claims, may be resorted to without departing from the spirit or sacriticing' any of the advantages of the invention.

ln the drawingst--lf`igure l is a vertical longitudinal sectional view on the line. 2---2 of Fig. -lshoiving` a iiioldnig apparatus. coniictcd iii accordance with this invention.

is :i plan view ot the apparatus. is a side elevation of the saine. Fig. 4 is a side elevation of the eccentric locking' mechanism. Fig. 5 is a plairtview ot the saine. Fig. G is a front elevation of the molding apparatus. Figs-t and 8 are fle- Fig. 1

` tail views. illustrating the construction of the guiding means for 'the sand frame. Fig. is a central vertical sectional view on the line t`i-9 of Fig. 1, illustrating the arrange- 3 nient of' vthe parts prior to clamping the sand reservoir on the flask. Fig. 10 is a vertical g sectional view similar to Fig. t), but showing the flask clamped and-ready for filling. {"ig. 1l is a vertical sectional view, the stripping plate being supported by the adjustable postT the niain cylinder being lowered and the carriage being moved back to permit the reservoir to be lled with sand.

Like numerals of reference designate corresponding parts Iin all the figures of thev drawings.. l

the preferred embodiment. of the inveiit'ion. 2 designates a base plate, forming a .support for a hollow cushioning cylinder 3. which also constitutes means for drawn/ig a pattern bv lowering a vertically movable piston 5. The verticallyv movable piston 5 provided with packing rings 4. and it rcceives a fixed vertical tube (l, forming a port which leads to a nain cylinder 7. The tub-c, 6 is provided adjacent to its upper end with packing rings S to make a fluid tight joint for the sliding piston 5. A soft packinif t) is provided to cushion t-he ie-aetion of the sliding piston 5,A and blocks 10 of wood, or other soft material are employed to avoid abia- K` sure from Contact. The main cylinder 'T is equipped at its upper end with a platen, preferably formed integral with the cylinder 1 and adapted to receive a pattern 13, or a set l of patterns. which pattern 13 is carried upward in a vertical direction through a sti-ippin plateI 12. The stripping plate 12. which i is designed to be provided with the usual opening 12 or openings for the passage of f the patterns7 is adapted to receive a flask 14. and is supported bv adjustable posts l5. as clearly illustrated in l"ig. 11 of the accompauving drawings. 'l`lie stripping plate is i supported by the posts before the pattern l 13 is carried upward by the main cylinder.

whichnraises the strippingplate and .sup, ports the same above the posts l5. and when thev cylinder is moved downward to draw the pattern. the stripping` plate is lowered to tlie posts 15 and is supported by the latter.

1T designates a horizontal pressure head provided at opposite' sides of the apparatus i with depending arms 18, preferably formed Tn tbe accompanying drawings illust ating integral with the pressure head 17 and provided with inwardly extending horizontal .projections 19 to engage the platen 11. The depending arms of the pressure head are also equipped with rollers orwheels 20, 1ocated at the outer face of the said arms 18 and arranged to run on horizontal tracks 16 to facilitate the horizontal movement of the pressure head 17, Which carries a vertical cylinder 21, suitably attached to the pressure head 17. The arms 18 have enlarged portions to which the said rollers or wheels 20 are secured, and a car`51 is thereby formed for carrying the reservoir 25 to and from the sand supplying means. Operating within the cylinder 21 is a piston head 22. having a piston rod 23 connected at its upper end with thepiston head and at its lower end with a cross head 24. The reservoir 25 is open at the top and has perforations 26 in its bottom. Admission of compressed air to the reservoir 25 through a supply port 30 is controlled by a piston valve 27, mounted in a valve chamber 28 in the cross head 24 and provided with pack- .ing rings 29. The supply port 30 may be connected with any suitable source of supply, and the pressure wit-hin the reservoir is exhausted by means of a valve 32, held closed by fluid pressure in a cylinder 33, acting against a piston 34, which is attached to the cross head 24. This valve is for the purpose of exhausting lluid pressure from the sand reservoir 25 after the mold has been completed and the valve 27 has been closed.

Attached to the head of the cylinder 21 are bearings 75 in which is journaled an eccentric shaft 35, pr'ovided with opposite shoulders 36 and equipped with a crank 37, attached to one end of the shaft. One of the shoulders 36 coperates with a fixed stop 36, located atv one side of the shaft 35 in the path of the coperating shoulder 36, as clearly shown in Fig. 4 of the drawings, and the other shoulder is engaged by a piv- `ot-ed pawl 38, mounted on a pinA 39 and pressed into engagement with the said shoulder 36 b v a spring 40, and adapted to be withdrawn from such engagement by a'cord 41. attached t0 the pawl 38 and adapted to disengage the same from the co-acting shoulder to permit the shaft 3 5 to rotate. The shoulder 36, stop 36a and pawl 38 hold the eccentric shaft in a given position during'the initial filling of the ilask, and the rotary movement of the shaft allows the reservoir 25 to descend during the jarring operation, as hereinafter fully explained. The piston rod 23 is provided with 'an extension 42, having an elliptical loop 42, which receives a crankV bend of the eccentric shaft 35. The crank bend is adapted to support the piston rod 23 and the parts 'carried thereby, and when the eccentric shaft 35 is partially rotated, the crank bend swings downward antLpermits the said downward movement of the reservoir 25.

The reservoir 25 is surrounded by a band 43 having a relatively slidable movement on the outside of the reservoir, and connected with the same by means of pins 44, projecting from `the reservoir and extending through vertical slots 44a in the band. The band is I normally held in its lowermost position with the pins at the upper ends of the vertical slots by means of springs 45, interposed between the upper edge of the band 43 and projectingr flange 46 extending horizontally from the reservoir 25.

Supported in an elevated position is a` supply hopper 47,`adapted to contain sand or analogous material, which is delivered to the reservoir 25 by a slidable b'ottomless drawer 48, adapted to be pushed forward on guides 49 by a fluid pressure controlled piston 50 of a cylinder 70 to deliver a charge of sand, or other material into the reservoir 25. The car 51 travels on the tracks 16 and Ais actuated by a fluid controlled piston 52 of a cylinder 53. The base 2 also supports a valve casing 54 having a supply port 55, and provided with a valve seat 56 and receiving a valve 57, provided with suitable packing rings 58. The supply port is adapted to furnish fluid pressure from'any suitable source of supply, and the Valve 57 is lifted by a compression spring 59, seated upon the valve casing and interposed between the same and a washer 60, which is connected with the stem of the Valve 57. The casing of the valve 57 is connected by a port 61 with the main cylinder 7. The` port 61 consists of apassage extending through the valve casing 54 and through the base at a point beneath the lower end of the vertical tube' 6. The base 2 isprovided ivith a supply port 63, consisting of a passage communicating with the cushioning cylinder 3.

The sand hoppei` is equipped with -a proi jection 65, consisting of an armtextending from the path of and adapted to ,engage the vc'rimlr'37 of the eccentric shaft 35. Compressed air or other acriform fluid is supplied to the cyl? inders 53. 21 and 70 by supply pipes 66, 66a and 66". andthe cross head 24, which has a port 68, is provided with a vale seat 69 to co-act with the piston valve 27.v The reservoir 25, from which compressed air is exhausted through the. port 62, is guided by projections 78, extending from the reservoir 25 and operating in guides 79 on the arms 18. The projections 78a of the sand band 43 are supported by compression springs 80, which raisethe band 43 and the reservoir to clear the. flask. A fluid pressure chest 73 in the cross head 24 is supplied from any suitable source of fluid pressure by a pipe or port 30.

san'd hopper and arranged xinl'the- T he air is exhausted from the main cylinder through an exhaust port 74 of the valve casingA 54, and a supply pipe 76 furnishes fluid pressure to the cylinder 33. The several pipe connections may he connected to a hose leading to any sui-table operating valves so as to furnish tluid pressure from a common `source` of supply. The cross head 24 is provided at the bottom with a perforated plate 81 for the purposemf distributing the lluid pressure The cylinder 28 `is provided with a port 32. through which the pressure is supplied and exhausted.

To operate the molding' apparatus. fluid pressure Vis applied through the pipe to the cushioning c vlinde 3, lifting the sliding piston ."ifrom its lowermost position at the lower end of thecylinder 3 and raising the pattern ll-lto the startingr position. A flask is'then placed on the stripping plate and the, hopper 4T'is lled with sand or' analogous imiterial. By moving; the car to the right to a position adjacent. to the hopper 4, the drawei 48 is beneath the hopper and the shelf 4S) forms a temporary 'bottom for the said drawer. which at this time,.is filled with sand from the hopper. The drawer is then nioved to the left. so that its bottom will register with the openingat the top ofthe reservoir 25, an extension 4S of the drawer mea nwhile closingl the bottom of the hopper. The drawer is then moved to the right to return it to its initial position beneath the hopper. and the car is moved to the left to position it over the main cylinder 7. Fluid pressure is supplied to the back of the piston of the cylinder T0. pushing the hottomless drawer or reservoir 48 over the reservoir 25. I Fluid pressure is then applied Ato the hack of the piston ot the cylinder' 53; ,causing the ca 51 to move over the flask 14. By applying fluid pressure to the top of the cylinder 21. the cross head 24 forms a cover for the f reservoir 25 land rests thereon and causes the i dependingr arms 18 to rise. liftingr the car 51 and causing the projections 19 of the arms 18 to engage the. platen. and thus clamp the reservoir 25 over the flask formimer a closed .receptacle for the introduction of sand. or

other filling;r material. The arms and the inwardly extending projections llt thereof eonstitute fluid controlled means for lockiinf.r thc flask or core box to tht` said reservoir Q5 i and the means for introducing sand under fluid pressure into tht`v said flask or core box. rl`he piston i?? is arrested in its downward i travel by the eccentric shaft 37. the eccentric or crank portion of which is supported in its uppermost position by thtl paw] 3Q. When the tlasl; is thus clamped and ready for filling. the strippingr plate with the flask thereon is supported hy the main cylinder T: the hand 43 rests upon the upper edge of the tlaslt. and the sand reservoir is supported t by the said band 43 through the pin kand slot I wnneetion and the said springs 45. This will permit the lifting of the carriage 51 and the clamping of the flask in the manner before explained. Fluid pressure is then exhausted from the top of the valve 2'?, which rises from its seat 69 admitting fluid pressure from the supply pipe 30 through the port (58 into the reservoir 25, forcing the sand or other analogous material through theperforatious in the bottom of the reservoir Q5 ,and fillingr the flask 14.r The sand band 43 acts as an extension of the flask to .admit further pakking of the sand b v vibration. The pawl 38 is withdrawn, allowing the crank or eeoentrie to rotate and move dowmvardly from the upper end of the:I loop 42 to permit the sand reservoir to descend in the further packingr ofthe sand through the jarringof the flask. Fluid presi sure is supplied through the port of the valve casing 54 and through the port 61 to the main cylinder i", thereby causing the platento rise. As the platen moves upward. the spring 59 eats the valve 57 euttintr otll the fluid to the p ort (il and connecting the said port (l1 to the exhaust port 74. exhanstiingr the Ipressure within the main cylinder and causingr the platen to' fall. The main cylinder is arrested in its downward movement by the piston 5 and the. platen in fallin;T engages the cap a over the valve 5T. unseating said valve and reestablishingrcommunication between the supply port 55 and the port ttl. By this construction the main cylinder autonmtieally raised. and dropped. thereby producingr a jarring of thc flask and thel contents thereof. and the main cylinder T willl e continuously rceiproeatcd or vihrated in this manner" as lon;r as fluid pressure is supplied to theport. 55. 'l`hc valve 5T reciprocates ultomatically and the platen is continuously operated until thc mold is completed. B v applying tluid prt-ssurc over the valvev "2T and seating the same and exhausting: fluid pressure from the cylinder 33. exhaust valve 3L) is unseated and the fluid pressure is exhausted from the reservoir By exhausting t'luid4 pressure trom the top of the c vllndcr 2l. the cross t head 2l is raised and the car ."1 is permitted to return to the track 16. Fluid pressure is then applied to the forward end of th(` cylindcr 53 and the car is drawn hack. Fluid pressure is then exhausted from the cylinder Il and the platen is allowed to drop. lea ving thtl strippiupr plat-e 12 supported on the posts l5. and permittingr the. patterns to lie drawn. 'l`hc sand hand 43 is only employed in cases where an extremely hard mold is required. Ordimirilir molds can he made of sutlieient strength hy \ibratin; T the flask while fluid pressure is actingr upon the contents of the reservoir Q5. thus` dispensing with the neceseity of locking the reservoir 25 above the. flask. In such eases the reservoir will be supported directly by the-fl'ask, and uid pressure applied to the contents of the' reservoir and also to the vibrating mechanism to keep the flask full and to compensate for the 5 settling of the sand, resulting from the jarring or vibration of the flask. The mold ma)v be finished level in this manner, andl it will be unnecessary to strike ofi' the surplus material as is necessary with fthe ordinary molding device. The finished mold may now be removed and another flask placed on the pattern. t l 1 l The moldingapparatus ay employed for forming cores or molds lfor any purpose for which they may beb required. l

Having thus fully described our invention, whatwe claim as new and desire'l to Secure by Letters Patent, is

1. In a molding machine, the combination sand under fluid pressure into said ask 'or core box, and fluid controlled means for locking said flask or corebox into controlled relation to said means for introducing sand under fluid'pressure into said flask or core box.

2. In a molding machine,'the combination of a flask orl core box, means for introducing sand under fluid pressure into said flask or core box, fluid controlled means for locking said flask or core box into controlled relation to said means for introducing sand under fluid pressure into said flask or core box, and means for withdrawing a pattern or core from said flask or core box.

Il. In a molding machine. the combination of a mold box. means for introducing sand under fluid pressure into said mold box` fluid controlled means for locking said mold box in controlled relation to said means for introducing sand uuderuid pressure, and means for changing thc relative positions of said mold box and said means for introducing sand' under fluid pressure, for the purpose described. A

4. In a molding machine, the combination sot' a mold box. means` for introducing sand under fluid pressurehiknto said mold box. fluid controlled means for locking said mold box into controlledif-'lation to said means l'or introducing sand into said mold box. fluid controlled means for withdrawing a pattern or core from `said mold box` and means for changing the relative positions of said mold box and said,means for introducing sand into said mold box. for the purpose described.

5. ln a molding machine. the combination of a mold box, means for introducing sand with fluid pressure. int-o said mold box. fluid v controlled means for locking said box in controlled relation with the said sand introducing means, and means for exhausting pressure from the sand supplying means.

6. In a molding machine, the combination of a mold box, means for introducing sand of a flask or core box, means for introducing4 with fluid pressure into said mold box, fluid controlled means for locking said sand introducing means into controlled relation with said mold box, means for 4exhims fluid pressure from said' means for introdue's ing sand into said mold box, and fluid controlled means for withdrawing a pattern or core from said sand box.

7. In a molding machine, the combinationflask to-form a mold, means for rechargingrgf said filling means, means for changing the relat'irepositions of said platen and said filling' means, means for supporting said pla-ten, and fluid controlled means forsupporting said platen support.

9. 'In a molding machine, the combination with a flask or core box, means for support` ing the same in a relatively fixed position,

fluid controlled means for filling thc flask or core box to forni a mold or core, and means carried by the filling means for engaging witlrthe said supporting means for locking thcI filling means at. a point above the flask or core box.

l0. ln a molding machine, the combination with a flask or core box, means for supporting 'the same in a relatively fixed position. a car provided with means for engaging thc said supportin means, means carried by the car for filling the said flask or core box to form a` mold or core, and means for raising and lowering the car to engage the same with the supporting means to lock the. filling means at a point above the flask or core box and to release the filling means.

1l. In a molding machine. the combination with a flask or core box, fluid controlli-Pd means' for filling said flask or core box to form a mold, means for locking said filling means above said flask. means for releasing said locking means, and means for compressing said mold. A

l2. ln a molding machine. the combination with a flask or core box. fluid controlled means for filling said flask or core box to forni a mold. means for locking .said filling means above said flask or core box. means for releasing said locking means. and means for \f'ibratingsaid flask or core. box to further compress said mold.

13. In a molding machine. the combina` tion with a flask, fluid controlled means for filling said flask to form a mold. means for hold-ing said filling means'in controlled rela.- tion to said flask. and'mcans for vibrating said mold to further compress said mold.

14. In a molding machine, the combiua- Lori-6.324

P :nouns for changing thv .f'llniiw if'milinny I will flank nml unl filling;v immun. nml

nnwins for drawing n pntei'n.

Y il molding innnhino inulndlng n llink, l :illngrilnblc fluid controlled moans for filling l will flask to forni n mold. flnnl .'onfi'ollofl l inmuis foi' Plnnging said filling4 means. nouns fox' hanging the relative punitions of nld flnnk and 51ml fillingr nivnnfl. nnnin loi' dmwinf u palle-ini, :unl nnsins for YiM limiting :nin fleisk lo further ooinpi'vswa mill nnilll.

l?. In a molding machine, lnj; ffnmliiininon with n flask, fluid controlled inonnl for filling said flask. means for vibrating snill llink und the filling menus, and means for nshionmg said vibrating Insulin.

lB. In a molding machine. the conihinnlion with a flask. fluid contrnllml means fni filling bald flask to form u mold. moana for iliruiing said flask und the filling means to further compress contents of sind flask, unil voii' Carried by lli@ car. find al fluid pwssnio 'jllinalefr mounted on tho car und haii-ing :i pinion connected willi the.` i-snmvfiin ,will fsylinilei and pislon opel"- nling lio lowci' ille reservoir to lhoflask and mine the uur. l'l om* when raised engzigiiig with flan zuid vibrating means for holding' hl.- flask tliorullfn and for retaining Irlic reservnir in ponlllnn on lh@ flask.

tf1, In :i nmlfling nnmliine, the voniliinnlion with n ilu flninl (re-niiollurl means foi' filling nhl llnsk in loi'in n mold, means foi' minfin; .inni lllling manna with' felation lo .will flask nml :nouns for further vomA prf-wing sniil innld without disturbing tho i'olntinn lwfwnnn the flask :ind the fllling'.;

n'ienns.

ln :i nwlrling machine, the combinatn-.n will] n I'lusk oi'l vom box, means fnr snp'- poxfing said flask or Core box, means for vibrating Suid supporting means und snifl flank nivoi'o box.. and i'eslliently snppoi'lod r means foi' sni'ioiling said maling for inppoillng snifl ask oi core box.

25. ln a molding machin?, the conibina fion n ilh n flask or mvo box, means foil Slipnppning .smid flask or core box.,l moan for vibrating will snppoi'tinw innnns uno' Said llniil means to Cushion said vibrating mean i lion, n #sur pio'ln'lfvl with menus, for ungen?- i 1.9. In n molding machine, thu combinav tion with vibrating mechanism, of a flask "nil-lul by the same2 n cui' movable toward und from the vibrating moohnnism` :i resem Voir' carried by the cai: and n llnifl pressnrf vylinder mounted nn the mi' find having :i pinfon connected with flic i'l ei\i ii. Said 'yliinlei :unl pintni: opninling to imm-i' tin, i'onxivoir fo tho flask land mise lln` l-ni.

20. ln :i molding machine, tlnl comliinnfion nifl vibrating math-anhin. of n tlnk carried by the lsaine, a car nn,- 'nbie towni' und from the vibi'aling mechanism. d reserllusk or vor@ box. und flni Coniolld inmune l'ni' Supporting said moans for snppni'ing will llink of wir@ box.

El. ln n molding machine, the combination will; n fins-k ni com box, means for snppoijting; lho 5min, in n relatively lrfefl posiing.Y the supporting means, fluid Con'inlled nwnns vni'i'ied lijf llnf cui' for filling tbe flnSi: nr con box. :nifl means for imparting mlntivo 'vmlivnl mowinen tu flic oni. und he filling nwnns finiq engaging the nur with lnlinnn-ming! nimm and looking the fillini.r :infima: nl n point nbovn the flask or con) box.

.lllilll JACKSON HEWLWP'V. [in SJ inruil L. DEMMLER. n. s.; W ltnwsns:

lil l'liiws. lonnn'i C Molina.

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