US1895296A - Vulcanizer - Google Patents

Description

Jan. 24, 1933. F. J. sHooK ET 1. 1,895,296

VULCANI ZER Filed July 1l. 1930 4 Sheets-Sheet l Nummm INVENTOR /aRA/A/ T Haak AAA/D v Ara IVERso/v By 1% www/LMO v ATTORNEYS Jan. 24, 1933. F, J SHOCK ET AL, 1,895,296

VULCANI ZER Filed July l1. 1930 4 Sheets-Sheet 2 INVENTOR ATTORNEYS Jan. 24, 1933.

F. J. SHOOK ET AL VULCAN I ZER 4 Sheets-Sheet 5 Filed July 11. 1930 N. m mk 0 m TM S T N H e A s WL N 7. I 5?@ i U- ,of

Jan. 24, 1933'. A F J SHOCK ET AL 1,895,296

VULCANIZER Filed July 11. 1930 4 Sheets-Sheet 4 INVENTOR CA To jvc-Rs o/vA ATYORNEYS I Patented Jan. A24V, 1933 FLoRAIN J. snoox AND cA'ro rvrinsoN,

Yor AKRON, onro,

AssreNons rro NATIONAL RUBBER MACHINERY COMPANY, F' AKBONQOHIO, A C OBPRATIONOF` (pH-1.10";k

v n vU'IlcANrznn Application n1aJJu1y"11,./19so. seriaiNo; 467,195.9y Y

This invention relates tovulcanizersjsuch as are employed for the 'manufacture of vehicle tires and inner tubes of rubber or rubber y o Y canizer closed and. locked withan'oinne'r tube 55 and fabric.-

The general VpurposeO-f the inventionv is..y to improve upon existing vulcanizers as to ease, safety and efficiency of operation.

One obJect ofthe invention is toprovide an improved vulcanizer of the balanced type in which the vulcanizer sections are so con'- nected that `one counterbalances 'the other whereby the vulcanizer' is opened or closed with comparativeease. y A Another object of the'invention is to pro-4 vide a vulcanizer of the balanced type 1nA which one section is ofs'uch,` weight, as com;

pared' to theother, as no'rmallytov urge the vulcanizer sections to openposition. "l

A further obj ect of the invention is to provide fluid pressure means for operating a vulcanizer of this type, including means for cushioning the movement of the vulcanizer Y sections. y o .y n 2 A further object of the invention isto provide an improved means in said vulcaninzer Vfor effectively seating mold sections against each other under pressure kto .prevent the formation ,of a

ing the vulcanizer. p

A further object of the linveiitionis to fpro'- Y vide a simple locking'device for holding the4 vulcanizer sections together during-the appli-V cation of heat and pressure to the mold.

A further objectv of the invention is to provide effective means in avulcanizer to pre.

Figure 1 is a sectional Alevation'of a vul-v l canizer embodying the invention yshown in thewin;

`deslignatesa"suitable'bed or base frame 'on rind on.; the vulcanized ar-p` D ticles, such means vpreferably exertinglsuch:

pressure independently of the means Vfor clos- Y 'the bed. frame (Figureyl) and adapted'tov 90,*

as the lowerv platen is swung upwardly" to bring the vulcanizer sections Vintov coopera The lowerplatenvwith the y an open position with an inner tube inserted Figure 2 is a similarview showing the vultherein; y y

l Figure 3 is a view on line 3-3of Figurel 2; Figure 4 isa view online 4-j-4vof Figure 2; Figure 5 is aviewfon line 5'-'5'-of`Fi'gure 2;- f Figure is'a View on line 6-36`of Figure .5 `Figure .7 Y is `a view" on linef7-7 ofFigure 5; 'Y Aigure 8 isja view on line 88-of'Figure 2; an o i Figure 9 is a view on line 9s-f9 of Figure-1. Referringto the drawings,*the vnumeral 10 n which a lower vulcaniz'errsection orgplaten l'lfis pivotd as at 12, 12V by"` arms` 1 3;` 13 tov which the platen 11 is Secured (seeFigure 4) seat -by gravit'ylon` thebed framev 10, pref` erably in a forwardly sloping position (Fig" ure 1), seats vfor the platen 11 on top'of Athe frame 10 being indicated at 14. Y y c The platen 11 is arrangedto cooperate with anlupper platen Vlsecuredon'arms 16;""16 whichy are pivoted at 17, 17 on frame 10,*the f o Theplaten 11- isadapted Vnormally to' pivot supports at 17 being slidablymounted in slots 18,118 in the framey for limited move?" 4ment therein" for' a purposewhichf'willbe* .'explain'ed. 7"

Arms 13may be extended upwardly asiat` lato form one 'memberof a toggle, the other'.` member of which may comprise links 19,19

Connectedfto downwardly extended portions '85,

16a, 16a on arms 161, lthus providing'a toggle connection betweenthe platens designedtol holdl the upper platen upwardly and rearwardly when the lower platenis resting on cause the upper platen to swing downwardly tion V4(Figure 2) .n

various partscarried thereon is heavier thany the upper platen,'withthe result-that it overt-1v 95 balances the upper platen so asnormallyy toi i hold the vulcanizer open as show-nA in lu rel. i i Y For actuating the vulcanize'r sections,uid' f pressurecylinders 20,v 20 nnaypbek pivoted'on '100 zov ` is'adaptedj--to bedrawninto the cylinders,

i frame 10, as at a, with-the pistons 2l. there-j in connected by rods 22 to downwardly extendingportions 13b on arms 13. Afluid pressure supply line 23 is connected to ducts .24 in head 20b of cylinder 20, which ducts are vconnected by ducts 25 with f'to admit fluid intothe endsof thev cylinders d Suitable check valves are Varranged inducts 25to open to pressure' p orts26 serving behind the pistons.

i 34 therein'connectedv-by pipes 35 to arel'ief valve 36v similar` to valve 33,v VThese heads also have' ports 37 thereinl through whichv air I these portsl'gbeing closed yby pressure within y vrdash.potaction between said ports and headsA arranged to cooperate when thel vulc-anizeri's;

th'ecylinder by means ofv check valves37a.

f-Ports 381in saidcylinders at points' spaced.

from .heads20c .are :provided to produce'a Each 'vulcanizer platenv carries, a inoldfsection, platen 11 supporting 'a moldsection 39,?-

-. valves and-platen 15' amold section 40Hwhich-are closed,V These -mold sections arepreferably jacketed asshown to be heated by a iiuid me? Idium. .The ymold shown is designed toprof.

vide anannular molding cavity for vulcanizing inner tubes. v

The vulcanizerlocking means .comprises a f rotatable'bayonet plug 41 which may be arranged on thelower platen centrally of the mold section 39 and a bayonet socket 42=inv rtheupper"platenicentrallyfof the upper mold section, these partsbeing usualinterengaging lugs V43 andA 44, Vrespec-` ftively,'so arranged .as to permit insertio'nof; the pluginto the socket and jthen rotation ofV the plugthe'reinfto',engage the lugs. 'The provided with the plug 41 may be arranged to berotated by i .ends

securing it on a shaft 45 rotatable by a' crank 46 connected toa piston rod 47, the piston of which is operable ina cylinder 48 pivoted at on the lower platen, said cylinder having luldpressure connections 50 and 51 at both thereof whereby said piston is double acting. 1 I. i w' The ,vulcanizer is constructed so that a co1nl paratively heavy pressure may be applied to the mold terial,su'ch as rubber, housedin an annular groove 53 inthe face of thevulcanizer platen l11 (over, which .is arranged a safety plate 54 shiftablef-in said groove, upward movement of whichis limited bystops 55,55.l In order Y innertubeval've, by

and said points..`

admitted throug to eXpandthe same and force when the vulcanizer is locked. This l provisioncomprisesan eXpansible, annular envelope or diaphragnr52 oflexible ma-l to prevent deterioration ofthe expansible diaphragm or envelope 52 by the heat of vulcanization, a composite asbestos and steel plate. 56 (Figure 9) is arranged above plate v54 in groove 53 and is-supported onlplate 54 by-spacer channel members 57 whichprovide an; insulating air space beneath `'the asbestos f and steelV plate 56;k The envelope 52 may be provided with atting 52a, similar to an sureniay beslpplied thereto to expand-fthe same.

' g In an'inner tube vulcanized asY shown, Ait

haslbeen found that there is a tendency for the valve base within'the tube to be ,forced `Vmore or less thro-ugh the wall ofthe tube by the Vvfluid pressure used to expand v the .tube against` the-.mold surface..` the upper mold section 40 with an extending-lug or block` 57 (see Figure 8) adaptedl` toengagerin a recess 5,8 in the other moldsection 3,9 ata pointon the inner `periphery of the mold where the valve stem which a fluid .under ,pres-i To prevent this, may be. .provided Vof the tube-maybe 'brought through :the

mold, the block andrecess the 'valve Stem v;

. vbeing SO designed' as Vto lit about the valve stern, and a springY pressed pinj59 i-nblock V57isdesigned to grip f controlledv eitherfmanually by suitable .hand

able timelcontrolling.mechanism and valves operated thereby (not case the sequenceoffoperationmay be as follows:v Y`

(not shown) or automaticallybysuit- Shown), In either` VV'ith the parts as shown inFigure{1,'ar1finf lower mold' section 39'. Y-A"fluid, 'such as air under pressure,

heads 2 0"` into the cylinders '20, ca'using the tiondownw'ardly into cooperation. {Asthef lmold ksections 39""and` 40 move together,V the pistons 21Ypa`ss over passes through ports 34,

piping 35 'andreliefvalve'i This cushions the closing-of the vulcanizer. [Fluid Ais then is next supplied throughv ner tube or other varticle is mounted on the 1 f la. i

the ports 38 andthele'tt V i y Aends of thecylind'ers thusprovide dash pots rfr'o'm which'the fluid 115 supplied to cylinder 48 to actuate rod 475and crank 46 to -turn-plug" 41 in thereby the-vulcanizer `is locke hfitting 5 2a the lower mold o cket 142' andr Air or other-Huid underfpressure isneXt''lZQ to envelope 52 section tightly against theuppermold sec- .tion under such pressure as Ato`-prevei1ttl`1e forma-tionofa rind on the tube 'vwhen-vul canized. The shifting pivotaly 'mounting of reason 'of Athe'pressurefbet'ween the moldgsec'- section 15 on theffrainerlO at 18irelieves the vi .toggle connections-13 and 19offstresse'sby 'lof Vby 4relieving stresses aref assumed by. thelugsgt3 and 44' of the bayonet locking means.

tonsiQl. 1 Gravity causes the lower vulcanizerasection toswing downwardly and it `in turn, through the linkage, swingsfthe upper cess to cylinder 20 in front of piston `21', rst through .port 86 and then through ports 438,

andV when the pistonsjpass `tlieports 30, the* right ends of the cylinders 20v become dash.

fluid pressure being relieved slowly pots,.th e

valves 33. The vlinished varticle may through now be `remo-ved and araw 'articleinserted Vfor a subsequent vuleanizing operatlon.

, not be affected, ifbeing opened or shut or shut and unlocked it will merely open, and

the pressure shouldfall on the fluid It will'be apparent thatif for any reason pressure would lines, the vulcanizer if shut and loclzed that it is impossible for the vulcanizerv to close except upon positive operationl thereof.

`Accordingly, likelihood. 'of injury toworli- Vperfpivoted members,a toggle mechanism v N I second Varm supporting the,V upper, member, a second pivotal mountinglfor said? secon`d'100 1 per members,

men is reduced toa minimum. y

Modifications of the invention may be re# sorted to without departing from the spirit thereof or the scope of the appended claims. What is claimed is :A l. A vulcanizer comprisingvflower and upconnecting the lower member tothe upper member whereby .when the lower member is lowered the upper member is raised, said lower member having a` preponderance ofV weight so as to overbalance the upper member whereby the vulcanizer normally assumes an open position under means for suppontingr the lower member when the vulcanizer is open, means for closing the vulcanizer, cooperating' means on Vfor locking the members toeanizer member for applying pressure on a mold in said vulcanizer independently of said closing means.

2. A vulcanizer comprising lower and up- I a mechanism connecting the lower member to the upper member whereby when the lowermember is lowered the upper member is raised, said lower member having a preponderance of weight so as to overbalance the uppermember whereby thevulcanizer normally Vassumes an openV position under the action of -gravity, means for supporting the izer is open, means for closing the vulcanieer,

cooperating means on the vulcanizerA members 1 for locking the'v members together when closed, and'means on one vulcanizer member for applying pressure on armold in Asaid vul-- camzer independently of said closing means;

3. A vulcanizer comprising pivoted lower and upper 4thevulc'anizer will normally. be open,Y ymeans fer the acti on of gravity,

' canizer, the vulcan-` the'uppermemberisgraisedgsaidllowerfmem` y v. V12() I lower member when the vulcan-v anduppeI-xmembers, connectionsbetween the members is moved, the lowermember being vof greater weightso las to overbalancefthenp-i open, and VHuid, pressure means fengaging said lowerme'mberlfor. closing the vulcanizer,sa-idfV means being Vadapted tocushionithe' opening; y .75 Y

of theqvulcanizer when the iiuidpress'ure is i 4s A"vulcanizercomprisingfpivotedlower members, connections :between the members forfca'using the members 'to` movey to# wardor from y'each otherfwhen oneofisaid v members is movedthe lowermemberf-being of greater weight soas tooverbal'ance'theup per member normally/to hold the vulcanizer open, and fluid pressure means engaginglsajid lower member for closing"thevulcanizer.- v

ALYlileanizer-including. apa-ir of piv-v otallymcuntedzmembers of different weights so connectedthat the weight et the h'eavier one will eiieet operation of. the v.other whereby loinshevulanizeemeahs le the-rule Gamer folf applying pressure@ between* the' i members independently i c .said closi ng j means, andmeans for 'loc ing thevu'lfc,aniierf initsjclosedfpositiom v Akl .j ff 951` 1. 6; ,A-yiufcanizepeomp ising. lower aiidfup-z Per members; an "arie, SriP'ertee the'. liever 'i member, iipvlotel meantime folrfsiad afm.,

lewered the upper member s'aidlowlf'v `er member overbalancingj'thelupper member normally to hold thevulcanizer open; means" connected to Ythe iirst arm for iclosixig.r the vul-" means cooperating when'the vulcan# izer is closedfor locking the'- vuleani'zer, and s means for exertingV pressure4 between: the vul-f oaniz'er Y sections independently 'of 4s'aidl clos# t A vulcamz'erveomprisinglower land lupi j vper members,E an" armsupportingthelowerl member,"afpivotalmountinglfdrsaidarni, a second f arm* supporting the upper' member,- I'a 115 second p; votal mounting' for saidI ysecondi arm," I a link betweenfsaid farms providing"` a togglef whereby `wl1fen-the` lower member is Y ,llove're'df ber overbalancing the uppermember normal# to hold" the `vulcanizer open, fmea'nsl-con nected to the iirst arm for closingfthef vulcan-K. izer, andl means cooperating when the vulcan? izeris closed :forflock ng they vulcanizer."y i

- 8; .A vulcanizer comprising lower andupef 125 p per. members, anjarfm supporting!theflower member, apivotal: mounting 'forjsaidiarm, f a second arm supportinggthe vupper member;

asecond pivotalg` mounting forssfld Secondg Y arm, a link between saidV arms vproviding s513021 so', i

toggle whereby When .the 1ovver-member lflowered the upperm'ember is raised, said f lower member overbalancingthe upper mem-` ingthevulcanizer.' '9. 1A vulcanlzer comprlsmglower and up-v vand means connected tothe firsta'rmfor closberffnormally to hold Vthe vulcanizer open,YA

per members, an' arm supporting the lower member, a pivotal mounting for Saidarm,

ai second armi supporting the upper member,

a Second pivotal mounting `for secondVV arm, a link between said arms providing. a

toggle .whereby when). the' lower member is loweredl the upper member is raised, saidVV .lower member overbalancing the upper ,mem-

' i 'ber normally to hold the vulcanizer open, and

means for closing the vulcanizer.

jv l0. The combination in vulcanizer 'of re1at1vely movable plvoted vulcanlzer secv tions, connections between the lsections for moving one vulcanizersection when the other l vulcanizer section vis moved, oneof said vsec'- otherfvulc'anizersection is moved, oneofsaid sections beingl of preponderant VWeight so that the sect "12. The combination vulcanizerV of relatively movable plvotedgvulcanlzer sections, conneotionsbetween the sections for .moving one vulcanizerseetion kWhen the othery vulcanizer section is moved, lone fof] saidsectionsY being of preponderant weight so;V that the` sections ynormally move -to an as normally to open,

canizery comprising pivotally l `bers of different Weights linked together so as normally to open,f an annular mold carried: by said members', .and means comprising' inter-engaging bayonet plug and socket een#` forr moving for exerting when locked.

15. The combination with abalanced vulcanizer comprisingpivotally mounted members of different-Weights linked 'together so" of means for Vlocking and means .compr-ising' the members together, a Vfluidy expansible element inkone of"` said membersV for exerting ypressurebetween said a balanced vulmembers When locked. Y

.16. -v The combination with mounted mem'- pressurefbetween said members` trally of 'theI moldv for .A locking the members together; f l c- FLORAIN J.' sHooK.

oaro-ivnason.

ions normally move toan open-V :positionl v v Y open position,.'uid pressure means for movlng the vulcanizer sections together, means for locking the-sections together, and Vmeans in one section for applying lpressure von a 1 mold therein lWhen thevulcanizeris locked.A

13. The y*combination ina vulcanizer of Y relatively 1 movable pivoted vulcanizer secftions, connections between the sectionsfor moving one vulcanizer sectionwhen the other vulcanizer section is moved, Vone ofgsaidsections beingl of preponderant Weight so that l the sections normally,l move to'an open 'posil 14. TheV combination with a balanced-vul- Lricanizer comprising pivotally mounted memberso different :weights linked vtogether so of means, for closing said members, means forv locking said members closed,r: and meansvcomprising a fluid x a5.:eiirpansible lelement in one' of said members ition, means'for locking the sections together, andmeansin one section for applying pressure on a mold therein Whenthe vulcanizer is locked. f Y

aff-

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