Direct extrusion yog ib qho ntawm cov kev xav tau ntawmtshuab extrusion.Raws li kev txheeb xyuas cov yam ntxwv ntawm co rotating ntxaib ntsia hlau extrusion rau kev sib xyaw txheej txheem, qee cov ntsiab lus tseem ceeb ntawm cov cuab yeej siv, cov txheej txheem, thiab pwm ntawm kev sib txuas ncaj qha nrog kev sib hloov ntxaib ntsia hlau extruder yog tam sim no.
Twin-ntsia hlau extruder yog siv dav siv txuas ntxiv ntawm polymer.Txawm hais tias nws tuaj yeem raug extruded ncaj qha, uas yog, txawm tias nws tuaj yeem ua tiav ib zaug, tuaj yeem muab faib ua ob pawg: kev sib hloov ntawm kev sib hloov thiab kev sib hloov hetero-directional.Coaxial ntxaib ntsia hlau rau hauv kev sib tov thiab molding extrusion.Muaj zog muaj peev xwm ntawm kev sib xyaw, feem ntau yog siv rau kev hloov kho, sau, 1 ncaj qha txhim kho thiab cov yas extrusion thiab tov nrog cov khoom siv hluavtaws ntawm ob chav ntsia hlau alloys sib xyaw ua haujlwm, cov txheej txheem extrusion feem ntau yog siv cov modular ncaj qha extrusion mob nyob rau hauv cov khoom yog qhov chaw. ntawm tag nrho cov qauv sib xyaw, los ntawm kev sib txawv synfuels fiasco tube tivthaiv, kev sib xyaw ua ke ntawm cov ntsia hlau lub ntsiab kom txaus siab rau extruder tuaj yeem tsim kom txaus siab thiab txaus stability.Raws li cov txheej txheem kev sib xyaw tshwj xeeb ntawm kev xa tawm, yaj, sib tov, descaling, homogenizing thiab lwm yam, qhov xwm txheej ntawm kev sib koom ua ke ntxaib-ntsia hlau extruder siv hauv kev sib xyaw yog thawj zaug tshuaj xyuas.
1.Non - directional ntxaib - ntsia hlau tuaj yeem tsim kom muaj kev siab dua thiab ntws tsis tu ncua
Kev sib hloov ceev thiab cov nyhuv dispersion, feem ntau yog siv rau cov khoom lag luam uas yuav tsum muaj qhov tseeb qhov loj me molding thiab extrusion, xws li cone-direction twin-screw ntsia hlau siab dua tus txheeb ze tuaj yeem tsim cov duab siab ntxaib-ntsia hlau extruder rau PVC profile molding thiab extrusion.Piv nrog rau tus nqi shear thiab loj shear kev nyuaj siab, qhov siab dua qhov kev sib hloov ceev, qhov txiaj ntsig zoo dua.Ib leeg-ntsia hlau extruder tuaj yeem hloov mus rau qhov dav dav, tab sis nws cov yam ntxwv ntau yam tsis zoo li qhov sib xyaw ua ke.Nyob rau tib lub sijhawm, qhov kev sib hloov siab ceev tsis muaj zog ua rau qhov zoo ntawm kev hloov pauv ntawm cov ntsia hlau ntxaib yog li qhov tseem ceeb, ib qho ntsia hlau feem ntau yog siv rau molding extrusion, ntsia hlau dav dav lub luag haujlwm, kom ruaj ntseg ntawm extrusion.
Tsim tshwj xeeb raws li cov txheej txheem extrusion tshwj xeeb thiab cov khoom.
2.Principle ntawm ntsia hlau ntsiab tsim
Hauv kev siv cov khoom siv tshwj xeeb tsim khoom yuav tsum sib tov granulation thiab molding extrusion sib xyaw nrog tib cov kev taw qhia ntawm cov ntsia hlau ntawm cov ntsia hlau ntxaib feem ntau raws li "los ntawm kev huv" thawj ob kauj ruam, thiab feem ntau nrog tib cov kev taw qhia ntawm cov ntsia hlau ntxaib. thiab ib leeg ntsia hlau kom tiav cov qauv tsim, lub hauv paus ntsiab lus no txiav txim siab qhov ntev ntawm txoj kab yuav tsum qhib, kom ob lub ntsia hlau rau hauv.Tom qab granulation ntawm ob chav ntsia hlau sib tov, cov khoom yog txias rau hauv chav tsev kub, thiab cov khoom sib pauv tshwm sim ntawm ib tug ntsia hlau tuav, raws li qhia nyob rau hauv daim duab 1 (a).Thaum lub longitudinal ntws channel qhib, qhov kub nce mus txog rau thaum cov khoom melts.Tom qab ob qho kev ua tiav, nws muaj peev xwm qhib lub transverse ntws channel kom paub qhov nce ntawm kev noj cov ntsia hlau uas nyob ib sab ntawm tib lub hau, qhov nce ntawm kev ua cov nqi, kev ncua sij hawm ntawm kev tsim khoom thiab kev sib pauv khoom.Raws li qhov tshwm sim, qhov sib xyaw ua ke thermal keeb kwm nce thiab kev ua haujlwm qis.ib txwm ua rau muaj teeb meem: lub peev xwm, tab sis kuj ua rau tsis muaj zog rau qhov zoo ntawm kev hloov pauv.
Post lub sij hawm: Jul-18-2019