Ua ntej cov txheej txheem extrusion tseem ceeb, cov khoom siv polymeric khaws cia yog tov nrog ntau yam khoom ntxiv xws li stabilizers (rau tshav kub, oxidative stability, UV stability, thiab lwm yam), xim xim, nplaim hluav taws kub, muab tub lim, lubricants, reinforcements, thiab lwm yam. khoom zoo thiab processability. Kev sib xyaw polymer nrog cov khoom siv ntxiv kuj tseem pab ua kom tiav lub hom phiaj cov cuab yeej profile specifications.
Rau qee cov txheej txheem resin, cov txheej txheem ziab ntxiv los tiv thaiv qhov degradation ntawm polymer vim cov dej noo feem ntau yog ua haujlwm. Ntawm qhov tod tes, rau cov uas feem ntau tsis xav kom ziab ua ntej siv, nws tseem yuav tsum tau ziab tshwj xeeb tshaj yog thaum cov no tau muab cia rau hauv chav txias thiab dheev muab tso rau hauv ib qho chaw sov so uas pib ya raws ntawm cov khoom siv.
Tom qab cov polymer thiab additives tau tov thiab qhuav, qhov sib tov yog nqus mus rau hauv lub feed hopper thiab los ntawm lub caj pas extruder.
Ib qho teeb meem tshwm sim thaum tuav cov ntaub ntawv zoo li cov hmoov polymer yog nws cov flowability. Qee qhov xwm txheej, cov khoom siv txuas rau hauv lub hopper tuaj yeem tshwm sim. Yog li, kev ntsuas tshwj xeeb xws li kev txhaj tshuaj tsis sib xws ntawm nitrogen lossis ib qho roj inert tuaj yeem ua haujlwm los cuam tshuam cov polymer tsim nyob rau saum npoo ntawm cov hopper pub yog li ua kom cov khoom ntws zoo.
Cov khoom ntws mus rau hauv qhov chaw annular ntawm cov ntsia hlau thiab lub thoob. Cov khoom tseem raug khi los ntawm cov ntsia hlau channel. Raws li cov ntsia hlau tig, cov polymer yog xa mus rau pem hauv ntej, thiab kev sib txhuam quab yuam ua rau nws.
Cov thoob yog feem ntau rhuab nrog ib tug maj mam nce kub profile. Raws li cov khoom sib xyaw polymer txav los ntawm thaj chaw pub khoom mus txog thaj tsam metering, cov kev sib txhuam thiab cov cua kub hauv lub raj ua rau cov khoom siv plasticized, homogeneously tov, thiab kneaded ua ke.
Thaum kawg, thaum lub yaj mus txog qhov kawg ntawm lub extruder, nws dhau los ua ntej los ntawm lub npov pob. Lub npov pob yog siv los lim cov khoom txawv teb chaws hauv cov thermoplastic yaj. Nws tseem tiv thaiv qhov tuag phaj qhov los ntawm clogging. Tom qab ntawd lub yaj yog yuam tawm ntawm qhov tuag kom tau qhov tuag zoo li. Nws yog tam sim ntawd txias thiab rub tawm ntawm lub extruder ntawm qhov nrawm nrawm.
Cov txheej txheem ntxiv xws li nplaim taws kho, luam ntawv, txiav, annealing, deodorization, thiab lwm yam tuaj yeem ua tiav tom qab txias. Lub extrudate yuav raug soj ntsuam thiab mus rau ntim thiab xa khoom yog tias tag nrho cov khoom specifications tau ntsib.
Post lub sij hawm: Dec-08-2022
