I. Kev qhia lus
Nyob rau hauv teb ntawm sab nraum zoov engineering, kev ua tau zoo thiab cov ntaub ntawv thiab cov ntaub ntawv ib txwm yog qhov tseem ceeb uas yuav tsum tau sib npaug. Acrylonitrile-Styrene-acrylate copolymer (ASA), nrog nws cov huab cua zoo heev thiab ntev ntev, tau dhau los ua cov khoom siv zoo rau kev tsim tawm sab nraum zoov. Txawm li cas los xij, nws cov khoom siv raw ntau dua tau txwv nws cov ntawv thov thoob plaws rau qee yam. Acrylonitrile-Butadiene-Styrene copolymer (ABS) tau them tus nqi zoo dua, tab sis nws cov huab cua tsis txaus. Txhawm rau sib npaug nqi-txiaj ntsig thiab cov khoom siv ua tau zoo siv cov ntaub ntawv ua haujlwm ua ntej thiab ua kom tiav los ntawm kev ua kom tiav cov qauv ua lej kom ua tiav cov nqi ua lej kom zoo tshaj plaws ntawm tus nqi thiab kev ua tau zoo.
Ii. Kev sib piv ntawm cov khoom siv thiab cov txiaj ntsig zoo ntawm composite
(1) cov yam ntxwv ntawm asa cov khoom siv
Acrylonitrile-Styrene-acrylate copolymer (ASA) yog cov ntawv ternolymerization lossis monomers: Acryloos (a), STRYREE (a). Nyob rau hauv nws cov qauv molecular, cov pab pawg acrylate tso cov khoom nrog huab cua zoo tiv thaiv. Nyob rau hauv ultraviolet iradiation, cov ntaub ntawv dog dig polymer tau nquag mus rau molecular chart breakage thiab oxidation kev tawm tsam. Cov khoom siv acrylate hauv Asa tuaj yeem nqus cov hluav taws xob ultraviolet, dissipate lub zog los ntawm nws cov kev hloov tsheb, thiab yog li maj mam ua kev laus ntawm cov khoom. Cov kev tshawb fawb muaj feem qhia tau hais tias nyob rau hauv ib puag ncig sab nraum zoov, tom qab 5 xyoos rov siv dua tshiab tshaj li 80%, uas yog qhov zoo dua li lwm cov ntaub ntawv polymer. Tsis tas li ntawd, ASA tseem muaj tshuaj lom neeg corrosion tsis kam, uas tuaj yeem tiv thaiv cov yaig ntawm qhov chaw hnyav xws li cov kua qaub cov kua thiab ntsev. Nyob rau tib lub sijhawm, nws muaj cov kev ua tau zoo siab thiab kev ua haujlwm zoo, sib ntsib cov kev cai ntawm sab nraum zoov rau cov tsos thiab siv sijhawm ntev.
(2) cov yam ntxwv ntawm cov khoom siv abs
Acrylonitrile-Butadiene-Styrene copolymer (ABS) yog cov thermoplastic yas copolymerized los ntawm peb Monomers: Acrylonitrile, Butadiene thiab Styrene. Lub xub ntiag ntawm Butadiene roj hmab theem ua rau ABS muaj kev cuam tshuam zoo heev thaum raug cuam tshuam sab nraud thiab txo ntau tiam thiab nthuav tawm ntawm cov kab nrib pleb. Tsis tas li ntawd, Abs kuj muaj cov tshuaj molding thiab ua tau zoo, thiab tuaj yeem ua rau ntau yam duab ntawm cov khoom lag luam xws li kev txhaj tshuaj molding thiab extrusion. Ntxiv mus, nws cov khoom siv raw yog tus nqi qis dua, thiab nws tau siv dav hauv ntau daim teb. Txawm li cas los xij, huab cua tiv thaiv ntawm tsis muaj neeg pluag. Nyob rau hauv ultraviolet iradiation, nws yog ib qho zoo rau yellowing thiab embrittlement, thiab nws cov khoom siv neeg yuav poob sai sai, txwv nws siv nyob rau sab nraum zoov engineering.
(3) Qhov zoo ntawm composite cov ntawv txheeb
Co-extruding Asa thiab ABS los npaj cov ntawv ua haujlwm tau tuaj yeem paub qhov zoo ua kom zoo ntawm cov khoom ntawm ob cov ntaub ntawv. Raws li cov txheej saum npoo av, ASA tuaj yeem siv tau nws cov huab cua tsis kam, tiv thaiv cov ntawv txheeb ntawm qhov kev yaig ntawm qhov chaw sab nraud. Raws li cov tseem ceeb txheej txheem cov khoom siv, ABS tuaj yeem siv nws cov kws kho tshuab zoo thiab muaj zog rau cov ntawv txheeb, thaum txo cov khoom siv tag nrho. Cov qauv no tsis tuaj yeem ua tau tsuas yog ua tau raws li cov kev xav tau ntawm kev ruaj ntseg sab nraum zoov thiab ua tau zoo ntawm cov ntaub ntawv, tab sis kuj tseem muaj txiaj ntsig zoo thiab cov txiaj ntsig nyiaj txiag.
III. Co-extrusion cov khoom siv thiab proCess tswj
(1) Taw qhia co-extrusion khoom
Cov khoom siv co-extrusion siv nyob rau hauv txoj kev kawm no muaj cov yam ntxwv ntawm kev ua haujlwm siab tshaj plaws ntawm 2.75 meters, uas tuaj yeem ua tau raws li cov kev xav tau ntawm cov kev tsim khoom loj. Cov khoom siv tsuas yog muaj xws li ib tug extruder, tuag, lub tshuab cua txias, ua haujlwm tawm ntawm cov txheej txheem thiab kev tswj hwm. Tus Extruder Adopts ib tug qauv ntxaib, uas muaj kev sib xyaw zoo thiab kev sib xyaw ua ke, kom muaj kev sib xyaw ua ke, kom muaj kev sib xyaw ua ke thiab yas thaum lub sijhawm sib xyaw ua ke. Tus tuag yog tsim nrog cov qauv hloov pauv, uas tuaj yeem ua rau cov khoom siv cov ntawv faib cuav thiab cov khoom siv tuab thiab zoo nkauj ntawm cov ntawv txheeb. Lub kaw lus txias adopts txoj kev txau txias, uas tuaj yeem ua kom txias sai thiab hloov cov nplooj ntawv nplaum, txhim kho ntau dua kev ua tau zoo. Cov traction system adarts sib txawv ntau zaus ceev kev cai thev naus laus zis, uas tuaj yeem tswj tau qhov kev ceev ntawm cov ntawv txheeb ntawm cov ntawv txheeb.
(2) Kev tswj hwm ntawm Co-Extrusion Txheej Txheem
Thaum lub sijhawm Co-Extrusion cov txheej txheem, qhia meej cov txheej txheem tsis yog tus yuam sij los npaj siab ua cov ntawv txheeb. Lub ntsiab tswj tsis muaj xws li kev siv hluav taws xob muaj xws li extrusion ceev, cov khoom sib piv, thiab lwm yam. Cov extrusion kub ncaj qha cuam tshuam cov nyhuv yas thiab fluidity ntawm cov ntaub ntawv. Rau ob cov ntaub ntawv ntawm ASA thiab ABS, raws li lawv melting kub thiab ua cov khoom, qhov kub ntawm txhua ntu ntawm cov extruder yuav tsum tau teeb tsa tsim nyog. Feem ntau hais lus, lub suab kub yaj ntawm Asa yog tus muaj siab, txog {{2} {{2} degree ntawm abs yog hais txog {}} degree. Yog li ntawd, thaum lub sijhawm sib xyaw ua ke, cov ntsuas kub ntawm txhua ntu ntawm cov extruder yuav tsum tau teeb tsa cov ntaub ntawv gradient kom paub meej tias cov khoom siv tau yooj yim thiab tsis decompose.
Lub Extrusion ceev tsis tsuas yog cuam tshuam rau kev tsim tawm kev tsim tawm, tab sis kuj cuam tshuam rau qhov zoo ntawm cov ntawv txheeb. Kev nrawm nrawm nrawm yuav ua rau tsis ncaj cov khoom siv, thiab tsis xws luag xws li npuas thiab delamination hauv cov ntawv txheeb; Qaum qeeb qeeb extrusion ceev yuav txo tau ntau dua thiab nce zog siv hluav taws xob. Los ntawm kev sim thiab kev coj ua thiab ntau lawm, txiav txim siab qhov tsim nyog extrust ntau ntau, thiab ua kom muaj kev hloov kho tiag tiag raws li cov ntaub ntawv kev ua tau zoo.
Cov khoom sib piv yog qhov tseem ceeb cuam tshuam rau kev ua tau zoo thiab tus nqi ntawm cov ntawv sib xyaw. Qhov siab dua cov ntsiab lus ASA, qhov zoo dua huab cua tiv thaiv thiab UV cov laus tiv taus ntawm cov ntawv txheeb, tab sis tus nqi yuav tseem ua kom nce ntxiv; Qhov siab dua cov ntsiab lus tseem ceeb, tus nqi qis, tab sis tej huab cua tsis kam yuav poob. Yog li ntawd, los ntawm kev txheeb xyuas qauv ua lej, txiav txim siab qhov zoo tshaj plaws ntawm ASA thiab AB hauv qab ntawm kev ua tiav ntawm kev siv ntawm sab nraum zoov.
Cov tuag siab muaj qhov cuam tshuam tseem ceeb ntawm cov kev sib tw tuab thiab zoo ntawm cov ntawv txheeb. Tsim kom tsim nyog tswj cov hmoov kev tuag tuaj yeem ua rau cov ntaub ntawv ntws mus rau hauv txoj kev tuag, zam kev sib txawv thiab qhov tsis xws luag. Saib xyuas thiab kho cov hmoov tuag nyob rau lub sijhawm tswj hwm tiag tiag los ntawm kev tswj hwm cov txheej txheem kom ntseeg tau tias cov ntawv ruaj khov.
IV. Daim Ntawv Thov Kev Npaj thiab Kev Tshawb Xyuas Nyiaj Txiag
(1) Daim ntawv thov cia siab
Cov npaj tau npaj asa \/ abs composite formats muaj kev ua tau zoo heev thiab tuaj sab nraud phab ntsa zoo nkauj, chaw tsheb, thiab rooj tog hauv tsheb. Hauv thaj teb sab nraum zoov billboards, huab cua tiv thaiv thiab UV Laus tiv tshuaj thiab cov qauv ntshiab tau ntev, txo cov nqi txij nkawm; Hauv kev ua vaj tsev sab nrauv sib qab zoo nkauj panels, cov kws kho mob zoo thiab tiv thaiv cov ntaub ntawv sab nrauv rau cov vaj tse; Nyob rau hauv daim teb ntawm tsheb seem, nws tuaj yeem siv los tsim cov tsev sab nrauv tsheb xws li Bumpers Sab nrauv cov tsev, txhim kho cov huab cua tsis kam thiab cov tsheb ua haujlwm.
(2) Kev Ntsuam Xyuas Nyiaj Txiag
Los ntawm kev siv co-extrusion tshuab thiab ua kom zoo tshaj plaws los ntawm cov qauv lej, cov khoom raug txo qis ntawm kev ua kom muaj kev ua haujlwm ntawm cov ntawv txheeb. Piv nrog cov ntawv ntshiab asa, tus nqi ntawm cov ntawv sib xyaw tuaj yeem txo los ntawm 30% {%, thaum tswj cov huab cua zoo thiab cov khoom siv zoo. Nrog rau kev nthuav dav txuas ntxiv ntawm kev ua lag luam sab nraum zoov, qhov kev thov kev ua tau zoo thiab cov khoom siv tsawg ua ntej hnub dhau los. Daim foos no muaj cov ntawv sau ua lag luam dav dav thiab cov txiaj ntsig kev lag luam tseem ceeb.
Tag
Txawv los ntawm kev yuav ncaj qha cov hniav sib xyaw rau extrusion, cov ntawv sau ua ke yog npaj los ntawm cov khoom siv ua haujlwm zoo ntawm ASA thiab cov txheej txheem kev tswj hwm tau zoo, kev tswj hwm zoo thiab ua haujlwm ntawm cov ntawv txheeb xyuas. Los ntawm kev txheeb xyuas tus qauv lej, qhov sib piv ntawm Abs thiab ASA yog qhov zoo tshaj plaws, ua tiav qhov zoo tshaj plaws ntawm tus nqi thiab kev ua tau zoo. Txoj kev kawm no muab cov nqi kho nqi rau sab nraud sab nraum zoov, uas muaj qhov tseem ceeb siv cov txiaj ntsig thiab qhov tseem ceeb tshaj plaws. Nyob rau hauv lub neej yav tom ntej, ntxiv rau kev siv tshuab ntawm kev siv cov tshuab thiab kev ua tau zoo ntawm cov ntaub ntawv sib xyaw tuaj yeem ua rau lawv cov ntaub ntawv ntxiv rau kev txhim kho cov ntaub ntawv sab nraud.