Muaj cov ntawv sau los ntawm cov cim ntawm cov ntoo roj hmab o-rings tuaj yeem ua rau poob rau hauv lawv cov kev nyab xeeb thiab lwm yam kev nyab xeeb yog siv nyob rau hauv cov khoom xws li li qub thiab twj. Yog li ntawd, daws cov teeb meem ntawm cov tsiaj ntawv sulphur ntawm fluoroelastomer yog qhov tseem ceeb fluoroelastomer thiab kev ua si tag nrho ntawm nws cov khoom tau zoo.
Kev tsom xam ntawm cov ua rau cov leej faj cov cim ntawm fluoroelastomer O-Rings
Ntawm chav sov, fluoroelastomer yog nyob rau hauv lub xeev siab-elastic lub xeev. Thaum qhov kub nce mus rau lub ntsiab lus melting, nws hloov los ntawm lub xeev siab-elastic ntawm lub xeev loj heev uas yog cov kua dej khov uas tuaj yeem ntws tawm. Nyob rau hauv kev txiav txim ntawm sab nraud quab yuam, cov roj hmab ua kom pom lub xeev ntws ntws thiab yog li tau txais feebatity. Nws yog cov fluidity ntawm kev kub siab uas xaus roj hmab nrog cov kev ua kom zoo rau kev ua thiab ua tau raws li kev xav tau ntawm kev ua cov txheej txheem xws li compression moulding.
Los ntawm kev tsom xam ntawm qhov teeb meem ntws thaum lub compressoroelomer, cov laj thawj tseem ceeb rau kev tsim cov tshuaj uas fluoroelastomer O-rings yog raws li hauv qab no:
I. Cov Khoom Siv Cov Teeb Meem
Uneven dispersion ntawm Fausoo: Hauv Fluorooelomer Formula, Fashers (xws li Carbon Dub, sila, thiab lwm yam) yuav tsum tau ua tusyees dispersed. Yog tias kev dispersion tsis ncaj, cov fillers yuav ua agglomeration cov ntsiab lus hauv cov roj hmab matrix, ua rau cov txiv kab ntxwv cov cim.
Kev ua lag luam tsis raug cai ntawm cov roj ntxiv: kev siv cov tshuaj tiv thaiv tsis raug cai, cov tshuaj tua kab mob antioxidan thiab lwm yam ntxiv yuav ua rau cov roj hmab ntawm cov roj hmab, ua rau cov kab mob uas tsis txaus ntseeg.
Ii. Sib xyaw cov txheej txheem teeb meem
Uneven Mixing: During the mixing process, improper temperature control or insufficient mixing time will lead to uneven mixing of each component, and eventually result in sulfur marks on the product surface.
Cov teeb meem khoom siv: yam xws li kev sib hloov ceev ntawm lub rotor, thiab tsim ntawm cov kev sib xyaw ua ke thiab ua rau tsis sib xws dispersion ntawm cov khoom nyoos.
III. Pwm Tsim Teeb
Tsis tsim nyog Gard txoj haujlwm ntawm lub rooj vag txoj hauj lwm, duab thiab loj yuav ua rau cov roj hmab ntws tsis zoo hauv cov pwm thiab cov ntawv sau los ntawm cov txiv ntoo.
Pwm Thaj Chaw Mob: Cov ntxhib lossis tsis zoo pwm ua rau kev sib txhuam thiab tawm tsam thaum ntws los ntawm cov roj hmab thiab tsim cov ntawv faj sulfur.
IV. Kev Txhaj Tshuaj Txheej Txheem Ntsuas Teeb Meem
Txhaj tshuaj nyem siab: siab dhau los yog kev txhaj tshuaj tsis tshua muaj siab yuav ua rau cov roj hmab ntws tawm ntawm cov roj hmab thiab cov ntawv faj sulfur. Ntau dhau los yuav ua rau cov khoom sib cais, thaum lub sijhawm qis dhau yuav ua rau tsis tiav pwm sau.
Kev Txhaj Tshuaj Ceev: Kev Txhaj Tshuaj sai: Kev txhaj tshuaj sai yuav ua rau cov khoom siv kom nrawm dua, ob qho tib si yuav tsim cov cim los ntawm cov neeg tuajxev.
Txhaj tshuaj kub: dhau dhau los yog kev txhaj tshuaj qis dua los yog pwm sau cov nyhuv thiab ua rau cov txiv neej sulphur cim.
V. Vulcanization Txheej Txheem Teeb Meem
Vulcanization kub: dhau lawm ib tug vulcanization kub yuav ua rau cov roj hmab los ua kom muaj qhov kub thiab txias, thaum tsis muaj qhov tsis txaus ntseeg thiab tsim cov cim cov tsiaj ntawv uas tsis muaj txiaj ntsig.
Lub sij hawm vulcanization: Lub sijhawm tsis txaus ntseeg yuav ua rau cov roj hmab tsis txaus ntseeg, thiab ntev dhau lawm yuav ua rau dhau los-ob leeg yuav tsim cov cim los ntawm cov neeg tuajxev.
Kev siv tsis raug ntawm cov khoom siv tsis raug cai: Hom tsis raug thiab cov neeg sawv cev ntawm cov neeg sawv cev ua kom viurcanization ceev thiab ua cov yeeb yaj kiab uas tsis sib xws.
Cov kev daws teeb meem rau cov tub rog Sulphur
Nce tus naj npawb ntawm lub sijhawm ntawm cov roj hmab compound remixing. Ua ntej kev tsim khoom thiab daim pam, nco tag nrho cov fluoroelastomer los txhim kho cov kev sib txuas ntawm cov pa roj caround xws li cov pa roj hmab thiab txhim kho kom muaj cov pa roj hauv cov compound thaum lub sij hawm vulcanization. Kev tshawb fawb qhia tau hais tias nrog kev nce ntawm tus naj npawb ntawm remixing thiab nyias-dhau, cov khoom pov thawj ua pov thawj "shear thinning" nyhuv. Ntawd yog, ntawm tib tus nqi shear, lub sij hawm ntau ntawm nyias-dhau, qis dua cov shear viscosity. Qhov laj thawj yog qhov remixing thiab nyias-dhau tsoo cov kev sib txuam thiab agglomeration ntawm fitters thiab txhim kho lub fluters thiab txhim kho cov kua txiv ntoo ntawm cov compound. Yog li no, thaum lub sijhawm ua tiav ntawm fluoroelastomer, nce tus naj npawb ntawm remixing thiab nyias-dhau ntawm qhov sib txuas, uas yog, ntawv tawm tom qab {4}} lub sij hawm ntawm nyias-dhau rov qab remixing.
Txhim kho txoj kev paug ntawm cov kab sib xyaw. Hauv cov txheej txheem ntau lawm, cov yeeb yaj kiab sib tov tau txiav rau hauv strip-puab ib daim hlab los ntawm kev txiav. Ua ntej nias thiab vulcanization, cov kab txaij raug mob nyob ib ncig ntawm cov pwm kab noj hniav. Tom qab kev ua kom zoo dua, kev tuag tuag yog siv rau kev pam kom cov zaj duab xis sib xyaw rau hauv lub nplhaib-puab qab. Qhov hnyav ntawm cov sawb yog tswj hwm ntawm txog 1. 3 - 1. 5 zaug}. 5 zaug. 5 zaug. 5 zaug. 5 zaug.)
Txhim kho cov txheej txheem tswj. Thaum lub sij hawm vulcanization, nyob rau hauv thiaj li yuav tiv thaiv cov teeb meem ntawm lub chaw thau khoom nrawm ntawm lub chaw thau khoom, tswj tau lub sijhawm ua kom tsim nyog thiab lub siab txhawb nqa kev ua haujlwm ntawm cov compound.
Nce lub qhov kev ua kom muaj kev limcxization siab, uas tau txais txiaj ntsig zoo rau kev ntws ntawm cov compound thiab lav ntawm cov khoom zoo. Tom qab kev ua kom zoo dua, cov siab-kev coj lub siab ntawm cov pwm muaj ntau dua 20 MPA kom ua kom cov khoom sib txuas ntxiv.
Los ntawm kev xeem cov ntsuas saum toj saud, kev nias thiab tshuaj ntsuam xyuas cov kev xeem ntawm roj hmab o-rings tau nqa tawm. Ntawm cov tsis tsim nyog o-rings, kev sib npaug ntawm cov neeg uas muaj cov tsiaj uas muaj nplaim thaiv cov kab mob saum npoo av tau txo ntawm 75% ua ntej kev txhim kho txog li 10% {{%. Qhov laj thawj yuav yog qhov ua kom muaj ntau tus lej ntawm kev hloov pauv ntawm cov compound, thiab kev ua kom zoo dua cov kab ke tsis sib thooj, tsis txhob sawb ceg tawv. Los ntawm cov txheej txheem tswj cov txheej txheem, qhov tshwm sim ntawm leej faj kos cim phenomena tuaj yeem txo qis.
