Tshooj 1: O-Ring yog dab tsi?
O-ring yog ib lub voj voog ncig uas yog siv los ua lub foob rau kev siv zoo li qub thiab muaj zog. Lawv lub hom phiaj tseem ceeb yog los ua lub foob ntawm cov qauv xws li cov kav dej, cov raj, hauv pistons, thiab lub tog raj kheej. O-rings yog ua los ntawm ntau yam ntaub ntawv nyob ntawm seb lawv yuav siv li cas thiab yog cov pliable heev. Thaum muab tso rau nruab nrab ntawm ob qhov chaw, lawv thaiv cov kua los yog roj.
Thaum siv los ua lub foob zoo li qub, O-ring tseem nyob ruaj ruaj kom muaj lub siab los yog foob lub tshuab nqus tsev. Daim ntawv dynamic ntawm O-ring tuaj yeem ua tau reciprocating lossis tig. O-rings yog ib qho kev sib khi rau tus kheej uas siv lub siab hauv lub raj lossis cov yeeb nkab los tsim cov foob.
Tshooj 2: Yuav Ua Li Cas O-Rings
Kev tsim thiab kev tsim khoom ntawm O-rings suav nrog kev siv extrusion lossis txhaj tshuaj, compression, thiab hloov molding. Lub extrusion ib feem ntawm cov txheej txheem yog siv los tsim elastomers rau txheej txheem molding.
Xaiv lub Pwm
Cov pwm rau O-rings muaj ob halves. Cov khoom yog compressed ntawm ob seem. Kev xaiv ntawm O-ring pwm nyob ntawm qhov xav tau txoj kab uas hla. Txij li thaum cov khoom nthuav dav thaum nws yog compressed, qhov zawj dav yuav tsum yog 1.5 npaug ntawm nws txoj kab uas hla. Rau kev cai O-rings, cov cuab yeej pwm tshiab yog lub computer tsim thiab tsim kom haum rau txhua qhov loj me uas yuav tsum tau ua. O-ring blanks yog txiav los ntawm steel siv lub tshuab dhos.
Rau tam sim ntawm O-rings, spliced thiab vulcanized O-ring ntau lawm tuaj yeem siv tau thiab tsis koom nrog kev siv cov cuab yeej tuag tab sis yog tsim los ntawm extruded elastomer qaum.
Xaiv cov khoom siv
Xaiv cov khoom raug rau daim ntawv thov O-rings yog ib qho tseem ceeb los xyuas kom meej nws cov kev ua tau zoo. Cov tshuaj sib xyaw ua ke, qhov kub thiab txias, thiab lwm yam khoom siv los txiav txim siab txog yam khoom uas yuav tsum tau xaiv raws li nws daim ntawv thov.
O-rings yog tsim los ntawm ntau hom elastomers nrog ntau cov khoom siv yog PTFE, Nitrile (Buna), Neoprene, EPDM Roj Hmab, Fluorocarbon (VitonTM), thiab Silicone nrog silicone siv rau kev siv kub. Daim duab hauv qab no yog cov npe luv luv ntawm ob peb O-ring cov ntaub ntawv thiab lawv cov khoom. Elastomers tau txais lawv cov kev ua tau zoo thiab cov yam ntxwv los ntawm cov khoom siv sib xyaw hauv lawv.
| O-ring Properties | |||||
|---|---|---|---|---|---|
| O-ring Properties | Nitrile | Viton | Ethylene propylene | Fluorosilicon | PTFE |
| Khoom | |||||
| Tensile zog | Ncaj-zoo | Zoo-Zoo heev | Zoo-Zoo heev | Zoo-Zoo heev | Zoo heev |
| Cov khoom hluav taws xob | pluag | Zoo heev | Zoo heev | Zoo | Zoo heev |
| Huab cua Resistance | Zoo | Zoo | Zoo heev | Zoo | Zoo heev |
| Ozone Resistance | Ncaj ncees | Zoo | Zoo heev | Zoo heev | Zoo heev (450 degree F) |
| Thaum tshav kub kub Resistance | Zoo (225 degree F) | Zoo heev (400 degree F) | Zoo heev (275 degree F) | Zoo heev (400 degree F) | Zoo heev (-100 degree F) |
| Txias Resistance | Zoo-zoo (-40 degree F) | Ncaj ncees (-25 degree F) | Zoo (-70 degree F) | Ncaj ncees (-20 degree F) | Zoo heev |
| Chav ua haujlwm | Zoo | Zoo | Zoo | Zoo | Zoo heev |
| Tear Resistance | Zoo | Zoo | Zoo | Ncaj ncees | Zoo heev |
| Abrasion Resistance | Zoo | Zoo | Zoo | Zoo | Zoo heev |
| Acid Resistance | Zoo | Zoo | Zoo-Zoo heev | Zoo | Zoo heev |
| Petroleum Roj | Zoo heev | Zoo heev | pluag | Zoo heev | Zoo heev |
| nplaim taws Resistance | pluag | Zoo | pluag | Zoo | Zoo heev |
| Zaub roj | Zoo | Zoo heev | Zoo | Zoo heev | Zoo heev |
Extrusion
Thaum lub sij hawm extrusion txheej txheem, elastomer yog pub rau hauv ib qho extruder uas heats cov khoom thiab yuam nws los ntawm ib tug tuag. Cov txheej txheem tsim cov kev teeb tsa xav tau los muab tso rau hauv pwm hauv qhov ntev ntawm txoj hlua. Cov tuag xaiv rau txheej txheem extrusion yog xaiv raws li txoj kab uas hla ntawm O-ring tiav.
Moulding
Muaj peb txheej txheem molding siv hauv kev tsim cov O-rings, uas yog compression, hloov, thiab txhaj tshuaj.
Compression
Compression molding yog siv thaum muaj qhov xav tau rau lub siab ntim me me uas tsis yog tus qauv O-rings. Nrog compression molding, cov khoom extruded yog muab tso rau hauv pwm kab noj hniav thiab tuav ntawm qhov kub thiab txias nyob rau hauv lub siab, uas yuam kom nws coj cov pwm.
Hloov
Hloov molding yog qhov nruab nrab hauv nruab nrab ntawm compression thiab txhaj tshuaj molding. Nyob rau hauv cov txheej txheem kev hloov, cov khoom raug yuam mus rau hauv pwm, thaum lub pwm raug kaw ua rau muaj qhov siab dua qhov ntev thiab tsis tshua muaj kev cuam tshuam ib puag ncig. Uniform siab yog siv los ua kom tiav cov pwm. Cov khoom siv molding tej zaum yuav muaj zog thiab muab tso rau hauv lub lauj kaub hloov los ntawm qhov uas nws raug yuam mus rau hauv cov pwm preheated.
Txhaj tshuaj
Cov txheej txheem txhaj tshuaj yog ua ntej cua sov cov khoom, uas yog yuam kom nyob rau hauv lub siab los ntawm kev txhaj tshuaj nozzle. Cov khoom nkag mus rau hauv cov pwm los ntawm ib tug series ntawm sprues. Cov khoom siv molded yog sab laug kom txias thiab tawv rau qhov kev teeb tsa ntawm lub pwm kab noj hniav.
Post Pwm Curing
Post pwm curing txhim kho lub cev thiab kev ua haujlwm ntawm cov pwm O-ring. Post curing nthuav tawm O-ring kom siab thiab nce qhov kub thiab txias raws li kev txhim kho nws cov yam ntxwv. Nws pab txoj kev sib txuas ntawm tus ntoo khaub lig thiab txhim kho lub zog tensile, hloov tau yooj yim, thiab qhov kub thiab txias distortion saum toj no yuav tshwm sim yog tias nws kho tau ntawm chav tsev kub.
Spliced thiab Vulcanized Extrusion
Lwm cov txheej txheem siv rau kev tsim cov hlua extruded yog spliced vulcanization uas tsis siv cov tuag los tsim O-rings. Spliced vulcanized O-rings yog tsim los ntawm extruded qaum uas txiav thiab sib koom ua ke. Lawv yog siv rau cov ntawv thov kev sib khi zoo li qub, kev ua haujlwm nrawm, lossis thaum tsuas yog ob peb O-rings xav tau. Lawv yog tsim los ntawm ntau yam elastomers thiab tuaj nyob rau hauv txhua qhov loj.
Txhawm rau tsim ib qho spliced thiab vulcanized O-ring, lub extruded qaum yog txiav mus rau qhov ntev kom zoo tom qab uas cov txiav xaus tau koom nrog siv tus neeg sawv cev sib txuas. Cov kev sib raug zoo thiab kev sib koom ua ke yog muab tso rau hauv cov pwm kub kub kom tsim tau ib daim ntawv cog lus molecular ntawm kev sib koom ua ke.
Spliced thiab vulcanized O-rings yog siv rau static nkaus xwb thiab yuav tsum tsis txhob tuaj nrog cov khoom txav. Lawv tsis pom zoo rau kev siv dynamic. Spliced thiab vulcanized O-rings yog tsim nyob rau hauv me me thiab yog zoo tagnrho rau luv luv manufacturing khiav.
Ua tiav
Tom qab O-rings raug molded, lawv yuav muaj cov khoom siv ntau dhau ntawm ob sab uas cov pwm sib ntsib. Cov khoom no, hu ua flash, yuav tsum tau muab tshem tawm rau O-ring kom muaj qhov zoo thiab qhov loj me. Flash tuaj yeem raug tshem tawm siv peb txheej txheem los muab O-ring nws zoo kawg nkaus puag ncig.
Drumming - Cov O-rings tau muab tso rau hauv lub nruas nrawm nrawm uas muaj pob zeb. Raws li lub nruas tig, cov khoom siv ntau dhau raug tshem tawm los ntawm kev rub tawm ntawm lub pob zeb.
Buffing - Rau qhov loj dua O-rings uas tsis tuaj yeem muab tso rau hauv lub nruas, lub teeb raug tshem tawm los ntawm kev ua haujlwm ntawm qhov tsis sib xws.
Cryogenic - Cryogenic deflashing yog lub computer tswj cov txheej txheem uas siv cov roj nitrogen kom khov O-rings ua rau lub teeb kom khov thiab tom qab ntawd raug tshem tawm nrog grit. Nws yog txheej txheem huv huv uas tshem tawm sab nraud (OD) thiab sab hauv (ID) flash.
Kho
Thaum O-rings deflashed, lawv yuav tsum tau kho. Ntev npaum li cas O-rings nyob rau hauv qhov cub kho yog nyob ntawm hom elastomer thiab tuaj yeem sib txawv ntawm ob peb teev mus rau ib hnub. Lub hom phiaj ntawm cov kauj ruam no yog txhawm rau txhim kho cov O-rings tiav thiab tshem tawm ib qho los ntawm cov kab mob ntawm cov txheej txheem tsim khoom.