US1295594A - Process of vulcanizing rubber articles. - Google Patents

Description

lonmwlngl was mantel-awn:

To allwihcmiit mayconcerma- ,Be it known that I, Bar tone-i Peron, a citizen of the United, States r s d ng a Mishawaka in the cannty :otSt. Jo eph an State of Indiana ihav inv nted: new and useful Improvements in Processes'of yulcanizingRubber Articles, oi which: therfollowingiisza specification.. My inventionrelates to the manufacture of articles, such as tires, hose, ruhberboots and shoes, and the like, andahas for ltaobleet to provide certain improvements inthe .prpcess of preparing the. articles for vulcanization and of then vulc'anizing the, same-as will be hereinafter more fully set forth and claimed 1 l Primarilymy improved process embodies the steps. of building. ,up ,thearticle either upon a suitable form or without the same, in such manner as to, reventthaentraneeiof the -vulcanizi-ng flui infiQthed-ntflgmz ther of or between: said! articleandits o m, and finally isubjeatingIthearticle so i prepared; to the-action oithe sultan-si ng med um-1, .A' further andimpertant s ep am my; treetosubject therticle-whemso bui tap to theaction ofan exhaust which isarra'nged to exert its sumion uponithednterio aof the article so that any trapped air, moist l lre or as will be withdrawn and the article ,will be more closely compacted or thug its form closer, thus elim nating alidanger otbuh- 'bles or blisters forming illthe article during subsequent .vulcanizaticrn. t

Many articles are formed with nqr a or less fabric or fiber, and the shape; enhausting the air ortotherifiuids rom mai -W of such! builtiupharticles not only prevents any subsequent blistering, but also i auses the rubberito murezai'ntinrately amalgamate with the fabric or fiber, thus insuring; a finished article in whiehrthaflow of the rubber into the fabric is accomplished; in a most thorough and homogeneous manner.

In carrying out said processes the article .is built up, either alone or on the form in such manner as to prevent access of exterior fluid to its interior, and if the exhaust step is to be emplo ed, is Sub ected in its interior, in any suitab e manner, to the action of an exhaust which will withdraw all the trapped air from the interior of the article and will cause the same when on a form to closely hug said, form. The final step of imlcanization may now be performed, and this may be done l p iarliebiilmflafi of Patent.

OFFICE animate tato mam 1m m m A Q Q QWB R B I lXQWWJQF 4 W F 3 rnoczss or vunqnuizmcinunmmim'rxcnnsi p rate-med Feb. 25,; 1919. s me. 634,939.

by means oflstearn, water, air or other fluid, either under pressure r n a da lt w ll e unde sto d that by reason of thescharapter otfabric, in which the threads n ws e ilvsstsnd h QQ Qll earea thereof, said threads will actas ducts to conduct the entrapped air or other fluidto the source of the vacuum. necessary, special ducts,

in the shape, of threads or i strips of fabric,

may be inserted when necessary to facilitate the escape, oi the entrap led air or other fluid from more or less isoigted ctions.

An important result following the exhaustion oifthe air or other fluid as above described is found in the fact that therubber will; ollow the escaping fluid, thus'not only insurin armors intimate union of the rub ber emf fabric, but also aeting to seal said d w i .14 i i It will be un derstood that the exterior :i QBfig iih l9J [.Q ihe areas an b imadifi du ing. e me nd .tu wlii etio i i consi rable limits, without interfering in t e 'eastw hlthe new s eps v a r i I ah yagpu d it imp ttent t i ure the immens the int r al v eem m m y be" in as we as the exclusion from the interior of the article of they vulcaniaing medium, which ma be done in several iways, as follows 7 i1. By ooating'the article which can reach ily be done by di ping sai article in a suit- 'able rubber soluion, or in collodjion, 01' by cover' 1 thesame with thin, flexible tin-foil. lfi one tgfthe labqve coatings; will in'any way int fere; ith, the flexi ility of the article il efih h e 'aste etthe matin m be changed if 3. ese fiezgi 1e oneisfdesired, such as ns-111d ers hemes t me extent .a ns l 7 sw ng. the-hr ie awh n uilt p t amass .rfl amzataen b sa e 19h would mate ally increase per able resistance'whenlater subjected to its complete vulcanization. This cold cure could also be applied to an article which had been coated with rubber solution as above described. It is, however, necessary to avoid over-curing of the surface when subjected to both the cold cure and to the subsequent heat cure, which may be done either by havin a the rubber cement used contain practical .no vulcanizin in edient, such as ea] ur,orby vulcanizmg 1n 9, medium, such as an extremely dilute alkalitv of the-rub er sed te so. that" ufthe access of the vuloamting m dition en a g t m heat, to 'efieetually counterbalance the expansive action of the entrefiped consistency it t it P hi ltl il W 1 i line solution, which would prevent overvulcenization of t mepiece, in I Still another importantjeeture or my proved process resides in exerting a Freeter pressure on the suriweiufir 1 1M remit t Yuma-Wi t re l 3 et40lbs. ressure ge t'erhperatiireof 287 R, which is a proper vfilofiiiizihg hedt for many articles. Now it is perfectly feasible to vuloen'ize' under we'tei; lfiaiiltdlhin' the wettest-287 F: end-exerting thereon" mahdrenliio of mutate lb'sl," bind "this" is many true "of eamen, l'ycerin aiidmahfw ther. suesmnees; fluiujet sucht emperiuires Such eddlti'ohal' press re w" l have fen im ortent weenie-cam eetin "the article, but it may requirea "sti er s eeewwithstand it, which mayte 'obtdinetl' by cold vulcanization a" gre te'r degree or by a stifier coating! l My inventionfeontemplates the application of pressure tothe erticles at a temperature high enough to soften the rubber so that it willflow morefreel into the fabric, but not high enoughito i'u canize; end then either removing he pressure-and then veleenizing in any manner, or subsequently inerfeasihg th tempereturebrthecem niediurnto the vulcenizihg ointeiter 's'til under pressure withijt e premiereleased; 01- I may employ a. mediate; such as alcohol, wliih when raisedito the {V111- thre wiil, by reason of said have amplepressur, due to expansion,

in order to still further aid in preventing interior of the article belng treated, '1 may use a vulcenizi'ng medium so thick in its that it willnottend topenetrate the ajrtile as quickly as would air or steam. For thispu tpp e'every igh me'ltlug 'poinepar-e would answer, "enthit It will be epprecieteil'thet by' e khelufsting the entrapped eir ithdj oth j fluids m the interiors of hu1lt ;up articles before or durvhlcani'zation;

' hitbfilet l l h iv h F 36m exter al than, would be obtained from the vuloanizing fluid edmm to the article which comprises 'formi bber and fabric on eeee by T all the disedvanthges pressure is exerted, are

pressure or notfbut will also be more firmly flfi fi 'im We" 1 avin thus what l c aim is e recess of tioles, 'wlneh elmsists cles, inclosing t0 terio'r surfaces-- descrlbed my invention,

vuleanizin illbher airin formingszthesartithem in envelope impervious gases to prevent eeeesskofi gasestothe ex- 'f the iertiel v. then? exerting a suction upon theinterior thereoito remove the inloshd by the en welep',:- and fihell? subjeetlh the same to :theeetioni of the:

can zlhggmedinma 1 2. The proeess er vuleenizing rubber erticles, which consists in' formingltheeertioles,

then treating the exteriorsurfaces thereof to render-them fluid ti tion upon the interior ghif, then' exerting thereof, an

a; sued finally subjecting the "same to the -action of the vulcaniz'ing medium under "pressure.

3. The process of vulcamzing ruliber artieles,-whieh consists in forming the articles, then treating the exterior surfaces thereofto render them fluid tight, nee upon the interiorsthen exerting a suctheneof, andafinally subjecting said -erticles to the aotion oi the I K pressure other than thetproduced b Fitsown elastieityu;

vulcanlzjin'g medium-under a ole whichbomprisesshe pin the article one coating over") theem i su rf *eXrtiIigfi suctlon on the inshaped article,

eial fluid-tight ace of the terior of the article "to therebyremove entrepplved fluid therefrom, ,artieex of l yer-s of rutind vulc'enizi ng the proo'ess for vulcenizing e rubber ng the article a form,

- prov1ding a substantially fluid-tight eoatin over the formed ertiele, removing' entrap 'the 'leyers, end vul'eaimzm l ow e Peron;