US1757119A - Molding press - Google Patents

Description

May 6, "1930. I G. G. HEGHINIAN 1,757,119

' MQLDING PRESS Filed Aug. 28, 1926 2 Sheets-Sheet l r I l k 77-715/5 25 73 May 6, 1930. G. Ylcs.. HEGHINIAN' MOLDING PRESS 2 Sheets-Sheet 2 Filed Aug. 28, 1926 FIG. 7

95 F/cal 1o INVENTOR Patented lVllayr6,-1930 i f e l@Ammanne. nnenmmm or BA'Lfrnvro.1r-n, MARYLAND 'Y MOLDINerneuss-` Y.Aplinearity Yfueaaugust 28, 192e.` serial No. 132,240. l

The main object is to provide a simple, feeding the chargesof materialto thel dies. powerful and reliable press for formingai` 1 IThe frame lof the press consists of three ticles from moldable materiah' A mainfparts, a base 15, Which-contains part ofv Another object is to provide a construction the hydraulic equalizing mechanism,and inofv this character for 'molding alternately in termediatepart lfconstituting'a die body 55 and table, and the upper part 17 Which carries L a number of molds.

Another object is to provide for the autothe, driving mechanism, crank shaft and matic control of the'mol'ding pressure 4so as plungers. to produce uniform lresults and avoid'injury The die'bodyis provided Withtvvo molding o to the machine@ .j Y recesses 18 and 19. Theanvill members 2O 60 Another object is to insure perfect molding, and 21are adapted to move up and'doWn in particularly around the edges of the article. these; recesses and form the lower, die vfaces Y Another object is to insure automatic ejec for-the blocks to be moldedh 'A rocker` memj y e tion of the articles.. ber has a shaft 22'resting in. bearing 23 Vin 5 The particular machine' herein illustrated thefupper part of thel base 15 This rcker 65 is designed for handling materialssuch as member has tWo side arms `24k 'andI 25' coninixtures of asphalt, saw-dust and clay, or nected by ycross barsQG and 27 which "are other mineral aggregate. Y mounted linslots 'in the lopposite ends,`V and The machineillustrated constitutes one inwhich 31161063@ in Slots inthe bottomfof the i ,jg strumentality in aprocess of forming blocks anvil members 21 and 2O Yrespectivelyl Two 70 embodying neWand useful characteristics., pail-S Ofpush rods 28 M129 aremo'unted on, For instance, a block formed of asphalt, savvthe Vends ofy the lcross rods l26 andf27 and dust and clay useful especially for road pav-V guided 'in lthe uppep part of ,the body 16, 'S0 ingV purposes. Such an article 1S made thatv they can move up andfdovvn and trans-V mXDg' fSaW-dUSbWlth Clay .Mld wat?? and mitacorresponding'actiorthroughthe rocker then adding liquid asphalt and'mixrngrthe O'n thehaft 22 152'? V-v j K A materials at a temperaturelsulicient to evapo- The' l'plungers 30 and 31l mounted'above the. rate the water. 4The resultant substance 1s anvil mgmbei-S 20- and 21,3@ adapdto'bg adapted to be molded under pressure and raised Aand loweredby the crankshaft/32 3.a V-llhOllt Of further'heat.' and'theconne'ctng 5J Figure V1 isaside view o'on'e formof press ad'altem'ately 4, y n embodyngmy'nVenfQn#l? i f -1Thedrivingroffthecrank'shaft'isfeffected "j Figur-@2 lsa-I'OHWGVZO-thelmei f fromA the gear 35andshaft,.36,Yvvhichcarries Figure 3 isa longitudinal sectional View gear 3,7? meshing with gear 38. f" This-latter l of the machine. l,

- u f is on'the shaft 39,3Which car-r-iesgear'lQkme'sh- Figure 4 is atransverse sect1o1rofthema-V fing with-gaaf 41 'Ongi-ghe 'endbfpzfhg Crank chine. v f j Shaft 1*: 1,7 i.; i Y Figure tt'isiarsectionfof a'modication. Y Qn the* die -body's mouliteda-fs1d; Qrhavi y Figure 6 is a, 'Sdevw 0f.l an accumulator cross seetionalshapeandsizejasthepiangere 13,0 l0@ Sed Wthtlle prrr/SS. y 30,and'll,jandlrecesses18Aand 19,fandffanvils Figure 7 fs, fagmentay Vertlclse- 20 and 21'rspectve1y-f This-slide s'r'ec'ptional view ofahopperand feeddevicef J rocatd on the ldie body-ibyftv'vo arms-145, g Y Figure 8 is a `plan"view ofone formof all which are hinged to the center ofthelslide and 5 anvil or bottomg'die. Y Y l to aleve'r thingedat?. l'lhc'connection 35* Figure 9 is an end view-of the same.; v 1 between the lever 46 and therods'l is'efected Figure lO'is a side view of the same.V v y by ,eyel bolts and nuts so-asto permitradjust- Figure rl1 is a longitudinal sectional view' ment ofthe length ofstrokeandsof the posi# Y* f i tionoftheslideonthe diebody. 1

5e Figure 12is'av planfviewof the vslideV for I Oneformfofsu'ch construction/'consists of l@ an eye bolt 48 on the end of the bar 45 Vadjustable in position by the nuts 49 and 50 so as to Vmove the slide 42 to the desired position for registration With the recess 18. The eye bolt 51 on the shank of eye bolt 48 is itself secured in a vertically adjusted position with respecttolthe lever 46 bythe nuts 52 and 53.

The twvoeye bolts 48 and 51 are'connected by the coupling Sleeve 54. The vertical adjustment of the eye bolts 51 changes the effective" length of the lever 746 iso ashto vary'ltliethrow of the slide 42 so asto bring the opening '43 into registration With fthe recess 19. The

v lever 46 has a roller 55 atxits upperend Which v. extends into the groove 'of cam 156 onthe end of .the crankshaft 32 so `that :as the crank shaft rotatersrthelever y46-'oscillatesfarnd re v eiprocates 'the slide42i between the plungers and fanvils. ,y Y.

The material tol be {molded} is fed through al'hopper'orfchute? toil-a point-immediately abovetheslideg42 andunidivay between theV krecesses 18 and 19. To'facilitatetheeoperation', the chute' has 1a. horizontal portion 58 yat its lower end in which .ispmounted afserew threador; propeller 59. on the V-shaftll 4This shaft has afstepped .pulley 61 beltedto-thev steppedpulley 62 on'ftheshaft 63 Which car-i riesthe spiral; gear` 641which meshes Ewith an'- i otherspiral gear fonetheshaft A39. These stepped pulleys make itfpossiblef-tosvarythe rate offrotationhoftheconveyorzserew 5,9 and hence vary the-amount of material fed to the slide- ,openings 43 L.and `t4-so.; as .to control theV amountof-the materialfor the desired thick- Y nessofblocks v to: loe formed.v The depth of theabloclror thickness Jmay befregulated puttinginlortaking out Yshim plates- 89;'above the pistons oit-rams.

.Itis thusZ possibleto nuakeblocks of- *diner-.I

' ent thicknesses with the same mechanisrmby` simply changingrthe speed of feed ofthe-ma-vr terial andfthe shimsgon `topi,ofthe Vpistons or :Theplun-gerssa-re provided-With projecting lugs 66 Whichextend out overytherods128 and 29:` respectively-S01 that-uhehne-plulleer,

for instance, 531,. is depressedV it Will gat .Y the lower' endgof its strokeg-engagefthe rods 28,"

'f and-pushthem down'.thustiltingthe rocker about thegshaftf22 .-andfforcingupward the anvil20 sofas to ejectthe` block fromgthe. Y* recess-18411; the path fof. movement. ofthe slide mechanism; inludinganaccumulator.' sailin-v 'F der 71,' and fplunger 72, andY a suspended vveigl1`t7 -3.I lIn the bottom; ofthe base 175,-a-re' two cylinders V7 4 and 75 .connectedby a-pipe 76at'o the accumulatorecylinler. `slistons or rams 77 and 78 .in Ythese vcylinders-areapropistons are held in place locking plates 81 and 82. .The Weight? 3 may be varied by adding or subtracting Weights. Liquid may be pumped into `the accumulator through the Valve 83 and its pressure'may be indicated by a Gage 84. f

, ach. anvi1,'such as 211prefer-ablyhasa 'centralmemberS su held 4dovvnby a cross piece 87 and pin 88. "In the operation'of the machine, if We assumethatthe!parts-arekinitially'in the posi y tion of F igure3, the molding composition is `feilthrough thecliute 57and forced by the .screw 5.9 into the opening 43 in the slide 42.

Thefcam'is so `ti1ne`d that the slide 42 is not-moved until theplungerSO has been entirely Withdrawn from; thefopeningfll, WVhen the plunger isy cleared, theislide fis .moved to bring the opening ..43and its; vchargeover the anvil21- and the prospective-recess 19. ;'Ihe

plunger 31 is then forced downwardathrough pported-onssprings. 86 andV the opening A3 rand;` compresses uthe material inl. tlielr'ecess 19; fyIn A.this.- aetion .theganvilfl bottoms on'the-shimiplate -89 fon topnofthe piston or ram, 78. It will besseennthatzthe str-okefof the reciprocating. plnngers f3.0 zand 3l, iis'positivelydetermined by' the 3 design? of 1 the for ankfsh-aft. andconsequentlyrthefamount of compression of the blockaisdeterminedby the ,pressure :in I.the accumulator, that is, E of course, vassumingfthat there isla reasonably fullfcharge fofniaterial in fthe. opening V43 to begin With. f

- In caseari-'excessive amount loff material` has n been 'fedfinto theadiefitsimply results'in the production :of Va fblockjo'f' slightly .l greater thiekness .and Withoutiinj-ury I:to )the .f-appafr-atus, since ithe .anvil and pistonl can .move downward yequivalent .to the excessive 1 thlckness by.:forcingfthealiquidinthe cylinder back I into the.aceuinulator.;-y'V n A 'Theiblocks l.are ej ect'ed :from the Vdife'. byf the positive factionr'if:r thee-flugs: ystriking fthe l l' l rods 28 androckingthe'rfejfector ffrainevabout its shaft g22'so estoi-.lift the. anvil 20andpush the biook `from f the vrecess 1218,] out of`l thev die into the path* ofl movement of f'thexislide 42- perfect l around thefed-ges fsince ithe fkspr-ingsf Y 86|v hold -upth-e center offthe liewhile the. ma? terial is fed into the die,-thuskinsuri ng that more materia-lifall a'llaa-round'fthe: die'y than-'at `the center. Y f I The strength: the. 8672,. hovveve'rj` is merely sufficient to'hold up the centralaporf tienen-1mb@ feeding-fer the; die ena ehe initial pressuretake place," after'which thev 16 onoppo'site edges ofthe recess 19 Vwhen.

theV anvil "is in the position shown at the right in VFigure 3, so that theV center piecev is flush with the face of thefanvil.

In the modification shown inFigure 4& he plunger consists of two parts namely, the die part 90 supported on springs 91and the ram 92 to which the *connecting rod 93 is lconnected. This form has certain advantages over the firstvform but the first form of Figure 4 is more positive'in its withdrawal action.

The slide 42 may have separable ends 42kv connected by yieldable catches 42a as shown in Figure l2fso that in case'the plungers stick in the die, the slide canseparate or pull apart and thus prevent breakage. n

One of the compositions or materials suitable formolding consists Vof from to 50 parts by weight of saw-dust, from to 40 parts of asphalt, and about 10 yto 20parts of clay. The clay is mixed with water so as to soften'all lumpsand nearly as possible form a colloidal solution. This is then'added to `Vthe saw-dust in a d'ouble'walled Vmixerpand heated to about 200 F. whilemixing, the sawdust absorbsthe water and clay. liquid asphalt is then addedv andthe mix- 0' continued Vunder artempera'ture of 300 to 5020@ F;l for about 20 to"30 minutes or until.

the water is entirely evaporatech'leaving 'they A wood impregnated and coated 4with clay and theasphaltic substance. The material, when Vproperly mixed,"resembles the consistencyofk wet sand and is veryeasily handled and molded; Although saw-dust Ai `s'preferred, some small 'wood chips or particles may be us d.V 'Ihepressure ofmolding. is preferably I .from one Vvto two tonsperi-square inchLw-Although I preferY to .use,fclay Vit should be 'il lunderstood that other nely dividedmi'neral substances may be usedwithor in place Vof the clay fory some purposes.` Y

In fact, roadside material including clay,

V'dirt and fine* sand, etc., can be mixed with vwater and asphalt and then the kwater evapo t f 'as ialt im reenatec e lated S0 as o 011m P p o i .theupper moldingsurfaceof the other part ls ok as tonprovideroomfor agreater depth of mol'dablematerial aroundfthe 'edge than over durable road pavingv material.

The process of. preserving vwoodmay also Y be applied to wood bloc-ks V'without vacuum or pressuresowas to impregnate them with clay and kwater phalt or creosote untilmthewater ls'evapof;`

and then immersein hot as rated. Y 1

It shouldbe understood also that the press maybe used kfor molding asphaltic Ymaterial f v having a lrecess,"a "lower molding plunger relatively movable 1n said recess from below containing crushed stone.

Y I claim:

having a recess, a lower molding plunger v relatively movable insaid recess and formed 'common level. j v

offat least two parts one of which has an upper molding` surface which is normally y below the upper moldingsurfaceof the other part so'as-tofprovide room for a "greater depthV of moldable""material over one partl than over Vthe other 'Y part, an upper y plunger movable intosaid recess from above and? `spring means between the two vparts ofthe lowerplunger for allowing the molding'surfaces of the two' parts of the lower'plunger tomove relative fto each other. i

` 21A molding press comprising adie bed` I havingtwo molding recesses, an anvil and a 1 plunger toco-act in each recess, a rocker connecting the two anvils', a feedlng slide having two passages, movable between said plungers and lanvils, means for -feeding the moldable having two molding recesses, anvils movable in lsaid recesses, a rocker connecting lsaiol anvils, plungers to co-actwith the anvils, a crank shaft Afor operating saidplungers, i

means for feeding material alternately to said-'recesses andmeansfor operating said rocker to alternately move said anvils to eject the finishedarticle.

4. Ina molding press,adi`e member having two molding recesses, an anvil and a plunger movable 1n each recess, a slide movable on said diel member between said plungers and anvils and having passages for theplungers, n

a rocker connecting the two anvils for-.feeding material yalternately-to said passages and means whereby when onefplunger is acting to forma bloclrin its respective dielit moves the anvil coacting they other-plunger" and-vice versa.V`

' 5. gmoldingpresscomprisingftwo mold-r ing units, means for-operating theml alter natev yf and hydraulic control and equalizing mea-nscoeafcting-fwithsaidfunits. i

` 6I In# a molding press,"` a idle:

parts one of which hasanupper--molding sur-Y face whichsurrounds andis normally'below the-centralpart,V :anupperiplunger movable into saidirecess fromabovef'and means for allowingthe molding surfaces of? the two'l parts/:ofthe lovverplunger to approach a t 7.y Aimolding 4press comprising a die bed and formed of two parts one of Vwhich'surrounds the other and has anupper molding surface which; is normally )below the 'upper bed havingv a recess, a'llower molding plunger movablev -infsaidre'cessand formedof at; least twof f Y moldngfsur'ace of\ thefotherfpart, an {upper compressing plunger relativelyfmovable yintosaidwreoess from,T` above; and -f sprngfmeans [for allowing fthelgmolding [surfaces :offtlle two parts of f the -loWer :plunger f to -movegrelfatve toqeacb' other: as theupperandlower plung ers ycompress f the Vmaterial fn-the recess.

,18. `Amolding-press eemprsing-afdiebed havrng a: reoess open; atzthegtooa lowermoldmg plunge-r movableun sald recess land formed of at'least twofpartsone of1which hasfanaupper vmolding suracewhich's nor- Y lnally belowfthe upper Vmolding surface of tbe otherfpartso :as to provide room for za s greater deptbfof moldable'materal over` one part than love-r; thefother; pargfanl upper oom-r pressing plunger Vmovable kinto said recess from the @top and means for allowing ,the molding surfaeesofitheftwo partsfof the lower ,plunger to .'approaoh -a common `level as fthe-.upper and f lower .plungers compress` the materlalln the recess.,

' 9, Inafmoldingfpressrthe @Olorlbnationrof a z dre :bed Shavlng a recess open @above f and below, x upper and :lower plungers relatl-Vely v movable. into sadreeess -romaboveandfrom below-said de-,becbtbeflowerf plunger-having two'relatvely movable parts y,one-oli' wh-ebl surrounds,- they other and ,at certainstmes has its nppermoldngsunfaeeheld'ata level dif- Y i ferent from the levelofstbennerpart and means.orgmovngtbettwo parts offtbelower plunger relative to .each other.

,10. lnamoldng press,aa.die bedeh-avng I.: two passages, Vplungersfmounted.above and below `feaeh passage, -means for alternately i raising ,andrlowerng tbe upper plungersand t'beflow'erplungers,eornprrsing a rockerfarm between .tlretwo tlower plungers andmeans foralternately ieedmg nrateralsto "tbeftwo ll. In a moldlng press, a dle Vbedy.baN1I`1gg; two-passages, plungers :mounted 'above and below each. passage, .meansforsalternately uaisngaand vloweringthe,upper,plungerslond n 'Y the lower plungers including-aroolgeraarm connecting*the. 4lowerplu-nge'rs-,and means'for p lternatelyfeeding..materialtothe twopas-A a v sages, :and 'a single-,enankfshat .withfmeans ofg connections tofthe upperfplungers for '-altternatelyfoperatingthesanne.A Y l. :12. A moldingl pressmeomprsing 'adebed emma" 1 Y alternately byfthe 'rockerfarm-sanddepressed altematelyabyfthe uppenpluugersn 14. A molding pnessieornprsing afdeqbed having :sa message; plungers vnl@uu-tedabove Y andbeloW-rsai'flf passa-ges)hydraulic-,pressure means4 for,eushonillg fthe x[lower liplungenga Cie-:uli Sbaftfforgeperatilg ililzuppr. Plvlself a feed slide hailing-afpassagge-foritbe 4 upper plunger :and means :for feeding nmaterial tto eheJ passagerinltheffeedwsldewhenfitiS eutfxf` registry, and means, :for :moving feeid'eed.

slide andi-ts; Contained tma beviel tOiwPOStQn of regietrylwith @the repassage iin 2th@ die Abed wbenibe upper plunger sraisedandtbe 10W- er rluegerfisdepressed. o 15. A molding press comprising a. diexrlpedVA Sage, havinga passage/for imei-ferial, 11eme-ans for ,feeding material ;to the (passage line'said eed slide,-trneans zfor-,uafrying tllle amount-.of material fedrto `the feed-slide, aplunger mov-l able `from,- beneath sad die. bed; into 5folle ,passage therein, :hydraulic grressuae means .ier Cusbon'ngvsaid plunger, aplunger movable from above said die bed zthnoughrtbe passage in tbe veed-slide and into-:the .passagen the 16V. `(In aimolding pressade-bedlbaving ,a reeess, a lower mold-ing plunger .1 movable ,in said recess :and -orlned of at,leastdzwog parts one of .whi'ebhas an. upper molding surtaoe wbe'h; surrounds ,and :is nornrnallyY below the upper Ymolding surffaceiofrtheotber, part sofas to provderoorn fonagreaterdepth ofvgnoldable materalaroundthe .edgeslthan over the oentralgpar't, anupper abutrnent abovesad Vle..CeSSand VJJQQELHS i for llflflevn'gthe melding surfacesiofthe two parts'of the lower. plunger` to; .bring-them Vto a cornmonlevelto compress' the material in4 the recess. agalnst the llower surface ofsaid abutment, the -,edgesf of the u material-1beinseempressflmfethantheenI Y ter. Y

having i two I die vvpassa-ges, `plungers 4r'nevalzle above and belowfQ-eaehfde passagega ffeed Y e ,slldehaving'passa'gesfadapted' to 'alternately register Awith `:ft-he L die passages and .a .screw feed dewiceylooated'betweenxthe upperfplungf passages in said slide.V

two :passa-ges, ipl'ungers mounted faboveliand ers lfor zfeedngmaterial u alternately .tothe Y below.7 said. passages, laf-rocker, armsoonnetng Y they slower L'p'lun'gers and hydraulic 'pressure n rneansvfoneushoningztlezlower?plungersaalternately, s sard f lower Yeplungers belng .-ralsed Y

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