US1820405A - Molding machine - Google Patents

Description

Aug. 25, 1931. H. B. swAN l, u 1.8209405 HOLDING MACHINE Filed Nov. 1e, 192s 2 snets-snet 41` WMP i Aug. 25, I1931.

,H. B. SWAN MOLDI'NG MACHINE Filed Nov.' 16. 1929 "2 sheets-sheet 2 Y am,

25 sand and the sand rammed down.A

Patented Aug. `25, 1931V UNITED 'Is'rarescl HARRY B. SWAN, orfnnrnorr; MICHIGAN, assenonro 'GENERAL kivrorons cpon'ro- RATION, or DE'rnorT, MrcHreaN, Aeon-fonetica or' DEL-AWARE f nonnina 'MACHINE Application fue'd 'Novemberia 1,929'. serial No. www. I

T his invention relates to 'molding machines* and has particular reference to a machine which utilizes a rotatable pattern plate or a` plate which may he inverted so as to utilize the two complementary patterns on thetrwo* ksides of the plate.'

AIn the prior art where a split pattern hasA been used it vhas been customary to place the y pattern in the drag and ram down the sand.

` A board is then placed over the bottom of the drag and the pattern and drag picked up and turned over. The cope was then placed over the drag and filled with sandv and the sand rammed down.' The cope is then lifted 0H T the drag and the split pattern removed by' In the present invention, a pattern plateis turnablyjmounted on trunnions in a frame and the two halves of the 'pattern securedto oppositev sides of 'the plate. The ydrag Visplaced on the pattern plate and filled v'vrith he pattern is then stripped fromthe mold and the drag is then removed-in the usual way such as by applying-a Vibrator tor ar it loose from Athe pattern..y The pattern plate is then rotated or `inverted and the copeplaced on the opposite side and sand applied and rammed down in the conventionalway; The vibrator is again applied to vtheV cope to permit its ready removal, and the cope then placedon the' 'drag and thetwo arev thenv ready'to be poured. This method necessitates less'handling and the handling of only cope or drag at one time instead of the entire flask.

It desired (and in practice it is tol be kpre-l ,vm ferred) 'ione-half of the pattern plate .will first be used to make theseries of fifteen or twenty molds (such yas the drag) andthe plate then inverted and a'second series of fifteen or twenty copes prepared to mate with thedrags. f

The machine of theinvention comprises a frame having enduprights and lateral connecting members.A Both of the end uprightsr are'provided with a pair of bars adapted to` lreceive a pair of reciprocable bearings in which `are mounted the trunnions of the r0- tatablev pattern plate. The end plates are providedwith suitable slots to vpermit 'the' extensionxof the'trunnions therethrough and; to allow for the reciprocation of vthebear` ings.;l A pair of links att-ached tothe OPPO- c lsiteends of the trunnions is'each'intercon.

nected with 'a second link pivotally mounted relative to the frame at one'end and provided with operating handles at theother endl By Y swinging fthe handles the bearings and pat-V Y tern plate maybe caused tol reciprocate.` 'A spring attached tothe operating links al-` ways tendsto holdV the 'pattern plate in its uppermost position and a plurality of pivotedlingers are mounted -on-the sidebars of theplate to retain it in position, "Common means is provided to'operatethe retaining` 'lnvers L 1. r

one end of one of thetrunni-onsthere isl secured va disc which is" provided with a Vthefra'rne and are adapted kto engage below Y pair of recesses intolwhich there is adapted to i enga-ge the 'point of a' fin-geripivoted on onevv of the bearings, The: inger is provided with an extension"V which is adapted to strike Y acam on the frame so that when the pattern platewis Lmovedfdownwardly7 ythe Vcam will.l

strike the-linger end to cause the point to bef" released from litsy recess and permit the rotaf tion of the plate'. The fingemlwhen engaged inthe recess,willprevent the plates rotation.- A finger suitably pivoted totheframe,` is` adapted Vtofbe swung on' itspivot when thel pattern plateis movedldownwardly, buton its upward movement the plate will strike the nger to cause the plate tobe rotated. The rotation of 'the plate will ofcourse rotate the.'

disc and after'the bearingshave been moved` to an uppermost position the plate 'will be atan angl-eef about andv itmayibe ro,Y Y

tated or movedthe remainder of its distance' byhandfv 'On the supporting` rods yare shown as positioned on the outside of the 'frame for the reasonthat "thereis less likelihood of their becoming in-V jured by thesand, although it is within the scope of the'k invention to placethe bearings and rods on the inside of the end pieces.

drawings the bearings .and'their On the drawings:

Figure 1 is a plan view of the molding machine with parts broken away and shown in section for purposes of clearer illustration.

Figure 2 is a side view of the structure of Figure 1 with one-half the llask in position and parts broken away and shown in section for purposes ot clearer illustration.

`Figures 3 and 4 are end views on the lines 3-3 and 4-4 of Figure 1 with parts broken away and shown in section.

Referring to the drawings, the numeral 2 indicates the molding machine as a whole. The machine has the frame 4 comprising the upright end plates 6 and 8 and connecting side pieces 10 and 12. The end pieces are preferably provided with the top flanges 14 and lateral flanges 16 and are recessed as at 18 to form the feet 20.

Mounted on the outer sides of the uprights 6 and 8 are the brackets 22 and 24 adapted to receive the lower ends of the rods 26, the opposite or upper ends of which are mount ed in bosses 28 formed on the top flanges 14. Mounted on the rods 26 are the bearings 30 which are adapted to slide up and down or reciprocate on the rods 26. The bearings 30 each comprise a pair of cylinders 32 and a connecting piece 34 which has formed thereon the bosses 36 and is provided with an opening for the reception of trunnions 38 rigidly secured as by means of bolts and nuts 40 to a rotatable or turnable pattern plate 42. The end plates 6 and 8 are each provided with a slot 44 Vto allow the trunnions to extend throught-he end plates to the bearings 30.

On the end of each trunnion 38, there is pivotally mounted a link 46, both of which extend downwardly and are pivoted as at 48 to rods 50 rigidly connected as at 52 to links or arms 54 pivoted as at 56 to the end uprights 6 and 8 of the frame. A tube 58 is welded to and connects the adjacent pivoted ends of the two links or arms 54 so that the operation of either handle 62 will lower the plate. The arms 54 are each provided with handles 60 which extend laterally of the machine and are provided with the operating ends 62 to be grasped by the operator. The end members 6 and 8 areprovided with the arcuate slots 64 to permit the rods50 to extend therethrough for their operation. By pushing .downward on the operating ends 62, the links 54 and rods 50 will pull on the links 46 to pull the bearings 30 and pattern plate 42 downwardly. The purpose of this downward movement will be later explained. The downward pull on the handles 60 and arms 54 will tension the springs 63 secured to the free ends of the arms and to a rod or bar 65 mounted between the end uprights 6 and 8. The springs will therefore always tend to return the arms 54 to or hold them in the position shown in Figures 3 and 4 which corpattern plate 42 from rotating. lWhen the point 72 ol' the finger 70 is engaged in one ol' the recesses 68, the plate will be prevented from turning. A cam 80 is rigidly mounted on the outside of the end plate 6 immediately below a linger and when the handles 60 are operated to pull the bearings and plate downwardly, the projecting end 82 ot' the linger 70 will strike the cam surface 84 to cause the finger 70 to swing away *from the recess 68 against the tension of the spring 85. liVhen the linger is withdrawn, it will be held by the cam out ot the recess until the end 82 is again freed from the cam surface 84.

On the downward movement of the pat-- tern plate 42, the squared portion 86 (Figure 1) of the trunnion mounting 88 will strike against the beveled edge 90 (Figures 1 and 4) ot a linger 92 pivoted as at 94 to the end upright 6 at either side of the pattern plate 42. 'When the squared portion 86 strikes the beveled edge 90, it will swing the linger 92 on its pivot and eventually pass the end ot the linger to allow it to lall back to the posif tion shown in Figure 4. A lug 96 on the trame 4 will prevent the finger 92 from turning in a counter-clockwise direction beyond the position shown in Figure 4. As the plate now moves upwardly, the upper side of the squared portion 86 will strike the lower or llat side ot the tapered end 90 and cause the pattern plate 42 to rotate or turn on its trunnions 38, the linger 70 being still out of the recess 68 owing to the fact that the end 82 is in engagement with the cam 80. The continued upward movement oit the bearings 30 and plate 42 will permit the end 82 of the linger T0 to be released from the cam 80 and permit the spring 86 to pull the linger 72 against the periphery of the disc 66. However, inasmuch as the plate has been partially rotated, the groove 68 will not conlorm to the linger 72 so that the finger will ride on the peripheral edgeY until the plate has been rotated through 180O to bring the second recess 68 into mesh with the tip 72. The spring 86 will now force the tip into the groove and in this position the plate will be inverted and the side which was uppermost will now Jface downwardly and the downwardly facing side will be uppermost.

The purpose ol2 this inversion or turning of the plate is to otter or present the two pattern halves for the flask and the cope. AThe pattern halves are shown diagrammatically at 98, 100, 102 and 104. Considering Figure l, the operator places the drag over the pate tern se it restslon the stripper plate 1057 at'tliey frame edge, suitable positioning means the plate on the Vstripper plate 105.

thatvv when they are taken from 2e 106 at the opposite sides 35'4 any being v appliedv on' 'the ystripper "or pattern cplates'l2, Aor botlikto properly position the drag.l The sand is now placed in thedrag and rammed down by hand to get a good shape of mold. applied to brealr'tlie pattern from the sand, 42 may be lowered 'leaving'the drag 'The plate may nowbe reversed or inverted, as hasibeen previously described, andthe patterns 102 and.

104 brought on the upper side. The cope is now applied and the sandplacedtherein and rammed dovvn.,` The vibrator `is yagain appliedV and the cope Withdrawn and placed on top o'l the drag. The positioning oi' the cope and drag on the pattern plate is so arranged the pattern plate andl placed on each other, the tvvo mold halveszivill conform `and permit the direct? pouring of the metal.-

In actual practice, it isxpreferred to: use

one side of the pattern plate to form a num- '2Q ber of drags and then invert ,the pattern plate and 'form a similar number of .copes This is desirable for lthe reason thaty it necessitatesfewer `turnings of the plate and speeds up production. Y' When tha purpose there have been'provided thengers of f the n machine. The fingers larerigiolly mounted onthe 'pive otal rods 108 trame uprightS." 'A handle 120 is secured to the end of therod 116 and bysuitalolyy turning the handle 120 the' rod 116and arms 11Ll'are operated to move the links 112 and links Y110. .The movement of thelinks 110 Will turn the rods 108fto swing the finger 106' which engage `beneath thepattern plate- 42. Suitable recesses 122 are provided in the nions mounted outside the. frame, reciprocating said Vtrunnions, and means vfor 'gdsides 10 and -12 to permit the fingers to swing freeof the pattern plate 42. f

Iclaim: x j f* A 1. In a moldingmachinmfa ltrarne, a pat'- tern plate. having tru-nnions, patterns on both .55.

sides of' said plate, reciprocable bearings for said trunnions mounted on said trame, means tor reciprocating said` bearings, and means operative on's'aid reciprocation to rotate saidv plate to'presentI eitherpattern.v 2. Ina molding maclii e, a frame, a pat` tern plate having'tru-nnions extending ontside the frame, patternson both sides oi said plate, reciprocablebearings for saidv trun- After va vibrator has been plate is'in its uppermost posi-` tion, means is provided to rigidly holdit and preventits accidental movement. .For this' lwhich extend through the frame sides12` andhave the rlinks 1.10 secured to the lowerends. The links 110 are in turn'fpivot-y ,o ed to links 1,12 connected at theireXtrem-ities. to arms 114 rigidly securedto a rod 116 turn mounted inbrackets' 118' secured to the means for causin-v the rotation ofsaid plate incident tofsa'id reciprocati'on tov present either pattern. Y 3. In 'a molding;

mounted in said bearings, vrpatterns' on both ymachine,a frame, bars mounted on said frame, bearings mounted on said bars, a pattern plate having trunnions sidesfof` said plate, means for moving said bearings'on said'bars, and means for causing the 'rotationof said VVplate incident tothe reciprocation 'of saidfbearings and plate t0' present .either pattern.

4f In `a molding' machine, a frame, a pat? tern plate rotatably and reciprocably mount-f ed in y saidy frame," patterns` on sides ot saidQplate', means for normally holding ysaid plate stationary, means for releas ing said holding means, means for reciprocat-k ing said kplate, and .means operative incidenty to said recipro'cation for rotating said plate to present either pattern.

ln a molding-machine, a frame, a p'at/ ternv plate, patterns'on both sides of. said plate, trunnions onsaid plate, bearings vfor said trunnions, kmeans mounted on one of said bearings and one of lsaid trunnions 'to normally hold said plate from rotation,

means for reciprocating said' plate and beari'ngs, mcans operative Yincident to said recip-V rocationA for causing the Vdisengagement of bothv said holdingrnea'na'and means operative in-` ,n

.In a molding machine,'a ltrame, a pattern plate, patterns on Vboth'sides of said plate, trunnions on ysaid plate, ybearings vreceiving said trunnions and reciprocably `mounted on said frame, a'disc on oneof said trunnionslhaving aiplurality of recesses, va finger onone of said bearings adapted to en-l gage in said recesses, means for reciprocating the bearings and plate ,tocause' thefdisengagem'entI of said vlinger from 'said recesses, l'

and means for rotating the plate toY present either :pattern upon the'r'elease ofsaid hold'- ing means. 1 I

` l8. 7In a molding machine,-a frame, a pat-v tern plate, patterns on `both. sides ofV said l f plate,v trunnions on said plate, bearingsreyceiv-ing said trunnions and reciprocabl'y mounted on said' frame, a disconone offsaid ytrunn-ioi-is` hav-ing av plurality of recesses, ay .finger on one offsaidbearings adapted to en-y gage in said recesses,4 means `for reciprocating the bearingsv and plate, a lcam'on said frame' rov 9. In a molding machine, a frame, a pattern plate, patterns on both sides of said plate,trunnions on said plate, hearings receiving said trunnions and reciprocably mounted on said frame, a disc on one of said trunnions `having a plurality of recesses, a finger on one of said bearings adapted to engage in said recesses, meansefor reciproeating `the bearings and plate to cause the simultaneous disengagement of said linger from said recesses, and a finger on said frame adapted to engage said plate when reciprocated to cause said plate to rotate to present either pattern.

10. In a molding machine, a frame, a pattern plate, patterns on hoth sides of said plate, trunnions on said plate, bearings receiving said trunnions and reciprocaloly mounted on said frame, a disc on one of said trunnions having a plurality of recesses, a finger on one of said hearings adapted to engage in said recesses, means for reciprocating the bearings and plate, a cam on said frame adapted to actuate said finger to remove it from said recesses upon the reciprocation of said plate, and a linger on said frame adapted to engage said plate when reciprocated to cause said plate to rotate to present either pat-tern.

11. In a molding machine, a trame, bearings reciprocably mounted in said frame, a rotatable pattern plate mounted in said bearings, patterns on both sides of said plate, links connected to said plate, handles operatively connected to said links and adapted to be moved to reciprocate said plate through said links, resilient means normally holding said plate in its Work receiving position, and means for rotating said plate on the movement of said handles to present either pattern.

12. In a molding machine, a frame, bearings reciprocaloly mounted in said frame, a rotatable pattern plate mounted in said bearings, patterns on both sides of said plate, a linkage having handles for reciprocating said bearings and plate, resilient means constantly urging said linkage in one direction, means for normally holding said plate from A rotation but ieleasable on the reciprocation of said plate, and means for rotating or re- Versing said plate on its reciprocation to present either pattern.

13. In a molding machine, a frame, a plurality of rods mounted on said frame, a plurality of bearings reciprocaloly mounted on said rods, a pattern plate turnahly mounted in said bearings, patterns on both sides of said plate, a disc rigidly mounted relative vto said plate and having a plurality of recesses, means pivoted to one of said hearings and adapted to engage in said recesses to normally hold said plate from rotating, means including handles for reciprocating said bearings and plate, means operative incident to said reeiprocation to disengage said pivoted means from said disc to permit rotation of said plate to present either pattern.

14. In a molding machine. a frame, a plurality of rods mounted on said frame, a plurality of hearings reciprocably mounted on said rods, a pattern plate turnahly mounted in said bearings, patterns on both sides of said plate, a disc rigidly mounted relative to said plate and having a plurality of receases, means pivoted to one of' said bearings and adapted to engage in said recesses to normally hold said plate from rotating, means including handles for reciprocating said bearings and plate, means operative incident to said reciprocation to disengage said pivoted means :from said disc to permit rotation of said plate, and means operative incident to said reciprocation to rotate or reverse said plate to present either pattern.

15. In a molding machine, a frame, a plurality of rods mounted on said frame, a plurality of hearings reciprocahly mounted on said rods, a pattern plate turnahly mounted in said bearings, patterns on both sides of said plate, a disc rigidly mounted relative to said plate and having a plurality of recesses, means pivoted to one of said hearings and adapted to engage in said recesses to normally hold said plate from rotating, means including handles for reciprocating said bearings and plate, means operative incident to said reciprocation to disengage said pivoted means from said disc to permit rotation of said plate to present either pattern, and a finger pivoted to said framevand operative incident to said reciprocation to cause the rotation or reversal of said plate.

16. In a molding machine, a frame, a plurality of rods mounted on the frame, a plurality of bearings reciprocahly mounted on said rods, a pattern plate, patterns on both sides of said plate, trunnions on said plate mounted in said hearings, means on said frame adapted to engage said table to hold it stationary, means for releasing said holding means, a disc on one of said trunnions having a plurality of recesses, a finger pivoted to one of said hearings and adapted to engage in said recesses to prevent the rotation of said plate, a linkage connected to said trunnions and including operating handles for reciprocating said bearings and'plate, means on said frame adapted to loe engaged by said finger to remove it from said disc, and a pivoted finger on said frame adapted to engage said plate on its upward movement to cause its rotation to permit either pattern tern plater r'eeiprocablyV and rotatalolv monnted in said Jframe and having patterns on both sides thereof, means for reciprocating said plate, reoprocation of said plate to cause a rotary? movement thereof, said plate capable of rotaa tion to present either pattern. y

v tern plate mounted n said cable and rotary movement and having pat-V 18. In a molding machine, a rame,va patrame :for reeipro terns on both sides thereof, means operative to ,Cause said pattern plate to take one of said 'V movements, and means operative upon thetaking ofsaid one movement to canse said plate to take the other movement, said plate 'l capable of rotation yto present either patn' tern. Y y v `Intestimony whereof I aHiX my signature;

HARRY B. SWAN.k

and means operative upon the

Images