Roj hmab sealing strips yog qhov tseem ceeb Sealing cov khoom hauv kev lag luam niaj hnub thiab kev tsim kho, qhov rooj thiab lub qhov rais, thiab khoom siv txhua yam. Lawv cov haujlwm tseem ceeb yog waterproofing, plua plav, suab rwb thaiv tsev, thiab kev co kom txo tau. Lub cev nruj thiab cov txuj ci ntawm lawv cov txheej txheem ntau lawm ncaj qha cuam tshuam cov khoom lag luam kev ua tau zoo, thiab lub neej pabcuam. Cov hauv qab no piav qhia txog cov txheej txheem tsim kev tsim khoom rau roj hmab sealing strips, los ntawm cov ntaub ntawv raw rau cov khoom tiav.
I. Raw khoom npaj: Tsim qauv tsim thiab pretreatment
Cov kev ua tau zoo ntawm cov roj hmab sib khi ntawm cov ntoo khaub ncaws nyob ntawm feem ntau ntawm cov qauv tshawb fawb ntawm cov khoom siv raw. Cov khoom siv hauv paus feem ntau suav nrog roj hmab ntuj (NR), nitrile roj hmab (nr), antylene diene monomer (EPDM), lossis Silicone roj hmab (VMQ). Txoj kev xaiv tshwj xeeb yog nyob ntawm daim ntawv thov kev cai. Piv txwv li, EPDM feem ntau siv rau sab nraum zoov thiab lub qhov rai sealing vim nws cov cua kub zoo heev, thiab kev kub ntxhov, thiab kev kub ntxhov; Thaum NBR feem ntau siv hauv kev siv tsheb cav vim nws cov roj tsis kam zoo.
Ntxiv nrog rau cov roj hmab matrix, cov qauv tsim kuj yuav tsum muaj ntxiv ntawm ntau yam kev sib ntxiv: vulcanizing cov neeg sawv cev (xws li sulphur lossis peroxide) rau crosslinking thiab kho cov roj hmab; Kev txhawb nqa fillers (xws li carbon dub thiab calcium carbonate) rau kev txhim kho kev siv zog kho lub zog thiab hnav tsis kam; cov hlua khi (xws li roj av - based sakeseners) rau kev txhim kho footeners; Antioxidants (xws li amines lossis phenolic tebchaw) rau kev laus laus; thiab cov xim rau kev hloov cov tsos zoo li xav tau.
Thaum lub sij hawm raw khoom npaj theem, cov roj hmab nyoos thoob plaws hauv qab Mastation. Tus txheej txheem no cuam tshuam nrog kev siv tshuab cov tshuab ntsuas kub (kwv yees li 80-120 degre Cov roj hmab masticated tau tso cai rau so rau ib lub sijhawm (feem ntau 8-24 teev) kom tshem tawm sab hauv kev ntxhov siab thiab ruaj khov lub cev.
Ii. Nws sib xyaw: ib kauj ruam tseem ceeb rau kev sib cais ntawm ntau yam
Kev sib xyaw ua ke yog cov txheej txheem tseem ceeb rau cov roj hmab masticated zoo nkauj nrog ntau yam ntxiv, ncaj qha cuam tshuam kev ua tau zoo kawg ntawm kev sib khi ntawm cov sawb. Cov txheej txheem no feem ntau ua tiav rau hauv cov khoom siv sab hauv Lub siab - nrawm nrawm nrawm ntawm sab hauv tov khoom lub rotor rog, tus neeg mob siab rau cov khoom siv hauv cov roj hmab loj.
Tom qab sib tov, cov roj hmab compound incound nav ua tau qhov kev sim ua kom zoo, suav nrog lub zog, thiab mooney viscosity, kom ua raws li cov qauv. Tsim nyog cov roj hmab sib tov tau nias rau hauv cov nplooj ntawv tuab (ib txwm muaj 2-5 mak), kom tsis txhob muaj qhov kub thiab txias)
III. Extrusion: Ua Daim Ntawv Yooj Yim ntawm Cov Sealing Strips
Extrusion yog ib kauj ruam tseem ceeb hauv kev tsim cov roj hmab sealing strips. Ib qho ntsia hlau extruder tsis tu ncua nias cov roj hmab sib xyaw ua ke rau hauv semi- Cov khoom noj tshwj xeeb nrog cov duab tshwj xeeb nrog cov duab. Ua ntej, cov roj hmab sib txuas yog preheated nyob rau hauv ib qho kev qhib qhib (kwv yees li 60 Lub cev muaj zog - driven ntsia hlau (50-200 rpm) conveys thiab compresses cov roj hmab sib txuas. Ib txhij, cov khoom siv cua kub (ntsuas kub (feem ntau yog 60-100 degree) nyob sab nraum lub thoob txwv tso cai rau cov roj hmab kom nkag mus rau lub xeev yas.
Thaum cov roj hmab txuas mus txog rau lub taub hau extruder, nws yog extruded los ntawm kev xav tau cov kab hla (pwm, duab sib dhos, zoo li lub ntsej muag, thiab lwm yam). Tus tuag qhov tseeb ncaj qha cuam tshuam cov sealing strip txoj kev tiv thaiv ntev (feem ntau tsis pub dhau ± 0.1mm). Yog li ntawd, siab - precision pwm yuav tsum customized raws li cov khoom kos duab. Kev sib tsoo pwm yog tom qab ntawd siv los kho qhov khiav ntawm Channel Siab thiab kub faib kom zam dhau xws li ploj lawm nplaum, nyem, lossis deformation.
IV. Vulcanization: Imj yam ntxwv kawg cov khoom lag luam
Vulcanization yog cov txheej txheem tseem ceeb rau kev ua tiav elasticity thiab lub zog hauv cov roj hmab sealing strips. Cua sov ua ib peb {{{- qhov seem hla, ua kom sov txuas ntxiv, kev teeb tsa kev ua haujlwm, kev teeb tsa kev teeb tsa, thiab cov khoom siv mechanical. Cov hau kev vulcanization feem ntau suav nrog cov huab cua kub ntshiab, ntsev da dej verticalization, thiab microwave vulcanization. Cov cua kub vulcanization (txuas ntxiv qhov cub) tau siv dav vim nws cov kev ua phooj ywg siab thiab ib puag ncig ib puag ncig.
Extruded semi -} tiav kev sib khi ua ke yog pub rau cov roj hmab hom tshuaj ntsuab: rau qib siab (nyob rau ntawm cov roj hmab Thaum lub sij hawm vulcanization, tus neeg sawv cev vulcanizing nyob rau hauv cov roj hmab decomposes los ua cov tshuaj tiv thaiv dawb ntawm cov qauv molecular, thaum kawg ua cov qauv siv hluav taws xob hauv kev ruaj khov.
Rau qee qhov sib khi ntawm cov txheej txheem nyuaj (xws li cov txheej txheem hlau lossis ua npuas ncauj txheej txheem ntawm cov ntoo khaublig qis dua -}} ntawv txuas. Tom qab vulcanization, cov hlua yuav tsum tau txias sai sai rau hauv lub taub dej txias (20-30 degree) los tiv thaiv cov chaw sov los yog deformation.
V. Post {{{- kev ua thiab tshuaj xyuas: theem kawg ntawm kev ua kom zoo
Vulcanized sealing strips strips yauv ntawm posts - kev tshuaj xyuas thiab kev tshuaj xyuas zoo. Nto Kho Mob (tshem tawm cov txheej txheem ntau dhau los yog kev siv cov nplaum corrosion)
Kev tshuaj xyuas nrog rau tag nrho - qhov kev ntsuas lossis kev sib tw ntawm lub cev tsis xws luag), ua kom muaj kev sib luag dua lossis sib npaug ntawm 200% uas yuav tsum tau ntsib cov qauv hauv tebchaws lossis cov neeg siv khoom). Qee qhov siab -}}}} end end end end end test test test test (acid,
Tag
Cov txheej txheem ntau lawm ntawm cov roj hmab sealing strips yog ib qho kev sib cav ntawm cov ntaub ntawv txuj ci, engine machinesering, thiab kev tswj tshuab zoo thiab tsim kho kom zoo nkauj. Los ntawm kev tsim qauv tshwj xeeb ntawm cov khoom siv rawulas rau cov txheej txheem kev tswj hwm, txhua kauj ruam yuav tsum tau ua kom pom tseeb tias cov khoom kawg tau ua raws li cov khoom sib txawv. Nrog kev nce qib ntawm kev lag luam thev naus laus zis, kev siv cov tshuab ua kom muaj zog siv rau kev txhim kho roj hmab ntawm kev ua haujlwm zoo thiab ntau ib puag ncig cov kev daws teeb meem.
