A conical twin ntsia hlau extruderyog ib hom twin screw extruder uas muaj ob lub ntsia hlau teeb tsa ua ib lub conical zoo li, tapering mus rau qhov kawg ntawm lub extruder. Qhov kev tsim no muab kev txo qis maj mam hauv qhov ntim ntawm lub hau ntswj, ua rau muaj kev nce siab thiab kev sib xyaw zoo dua. Lub conical twin screw extruder feem ntau yog tsim los ntawm lub hau ntswj, lub iav kis tau tus mob, kev pub mov kom ntau, lub tshuab nqus tsev, cua sov, cua txias thiab cov khoom tswj hluav taws xob.
Lub tshuab extruder conical twin screw yog qhov tsim nyog rau kev tsim cov khoom PVC los ntawm cov hmoov sib xyaw. PVC yog cov thermoplastic polymer uas muaj ntau yam kev siv hauv ntau yam lag luam, xws li kev tsim kho, kev ntim khoom, hluav taws xob, tsheb, thiab kev kho mob. Txawm li cas los xij, PVC tsis sib xws nrog ntau lwm cov polymers thiab cov khoom ntxiv, thiab xav tau cov txheej txheem ua tshwj xeeb kom ua tiav cov khoom thiab kev ua tau zoo raws li qhov xav tau. Lub tshuab extruder conical twin screw tuaj yeem muab kev sib tov, yaj, devolatilization, thiab homogenization ntawm PVC thiab nws cov khoom ntxiv rau hauv txoj kev txuas ntxiv thiab ua haujlwm tau zoo.
Lub tshuab extruder conical twin screw kuj yog cov khoom siv tshwj xeeb rau WPC hmoov extrusion. WPC sawv cev rau ntoo-yas composite, uas yog cov khoom siv uas sib xyaw cov ntoo fibers lossis hmoov ntoo nrog thermoplastic polymers, xws li PVC, PE, PP, lossis PLA. WPC muaj qhov zoo ntawm ob qho tib si ntoo thiab yas, xws li lub zog siab, kev ruaj khov, kev tiv thaiv huab cua, thiab kev siv rov qab. Lub tshuab extruder conical twin screw tuaj yeem ua cov hmoov WPC nrog cov zis siab, kev khiav ruaj khov, thiab lub neej ntev.
Nrog ntau yam pwm thiab cov khoom siv sib txawv, lub tshuab extruder conical twin screw tuaj yeem tsim ntau yam khoom PVC thiab WPC, xws li cov kav dej, qab nthab, qhov rai profile, ntawv, decking, thiab granules. Cov khoom no muaj ntau yam duab, qhov loj me, thiab kev ua haujlwm, thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm cov neeg siv khoom thiab kev ua lag luam.
Kev Piav Qhia Txog Txheej Txheem
Cov txheej txheem ntawm conical twin screw extrusion tuaj yeem muab faib ua plaub theem tseem ceeb: pub mis, yaj, devolatilization, thiab shaping.
Kev pub mis
Kauj ruam thawj zaug ntawm kev siv conical twin screw extrusion yog pub mis. Hauv theem no, cov khoom siv raw, xws li PVC lossis WPC hmoov, thiab lwm yam khoom ntxiv, xws li cov stabilizers, cov roj nplua nyeem, cov khoom sau, cov xim, thiab cov khoom hloov kho, raug ntsuas thiab pub rau hauv lub extruder los ntawm cov khoom siv pub mis sib txawv, xws li cov ntsia hlau augers, vibratory trays, weigh-belts, thiab cov twj tso kua mis. Qhov nrawm pub mis thiab qhov tseeb yog cov yam tseem ceeb uas cuam tshuam rau qhov zoo thiab kev sib xws ntawm cov khoom kawg. Cov khoom siv raw tuaj yeem sib xyaw ua ntej thiab pub mis, lossis sib cais thiab sib lawv liag ntsuas rau hauv lub extruder, nyob ntawm cov qauv thiab cov khoom xav tau ntawm cov khoom.
Yaj
Theem ob ntawm kev siv conical twin screw extrusion yog melting. Hauv theem no, cov khoom siv raw raug xa mus, nias, thiab cua sov los ntawm cov ntsia hlau tig thiab lub tshuab cua sov, thiab hloov pauv los ntawm cov khoom khov mus rau cov kua. Cov txheej txheem melting cuam tshuam nrog ob qho tib si thermal thiab mechanical zog input, thiab cuam tshuam los ntawm qhov ceev ntawm lub hau ntswj, kev teeb tsa ntawm lub hau ntswj, qhov kub ntawm lub hau ntswj, thiab cov khoom siv. Cov txheej txheem melting kuj tseem ceeb rau kev sib kis thiab kev faib tawm ntawm cov additives hauv polymer matrix, thiab qhov pib ntawm cov tshuaj lom neeg, xws li kev sib txuas, kev sib txuas, lossis kev puas tsuaj, uas yuav tshwm sim hauv cov yaj. Cov txheej txheem melting yuav tsum tau tswj hwm kom zoo kom tsis txhob overheating, over-shearing, lossis under-melting ntawm cov khoom, uas yuav ua rau cov khoom tsis zoo thiab kev ua tau zoo.
Kev Ua Phem Rau Lwm Tus
Theem peb ntawm conical twin screw extrusion yog devolatilization. Hauv theem no, cov khoom volatile, xws li dej noo, cua, monomers, cov kuab tshuaj, thiab cov khoom decomposition, raug tshem tawm ntawm cov yaj los ntawm kev siv lub tshuab nqus tsev ntawm cov qhov cua raws li lub thoob extruder. Cov txheej txheem devolatilization yog qhov tseem ceeb rau kev txhim kho cov khoom zoo thiab kev ruaj khov, nrog rau kev txo cov kev cuam tshuam rau ib puag ncig thiab kev noj qab haus huv ntawm cov txheej txheem extrusion. Cov txheej txheem devolatilization nyob ntawm tus qauv ntsia hlau, qib nqus tsev, viscosity yaj, thiab cov yam ntxwv ntawm cov khoom. Cov txheej txheem devolatilization yuav tsum tau ua kom zoo tshaj plaws kom ua tiav kev tshem tawm cov volatile txaus yam tsis ua rau muaj kev ua npuas ntau dhau, dej nyab qhov cua, lossis kev puas tsuaj yaj.
Kev Ua Duab
Kauj ruam plaub thiab theem kawg ntawm kev siv conical twin screw extrusion yog shaping. Hauv theem no, cov yaj raug extruded los ntawm lub pwm lossis lub pwm uas txiav txim siab qhov zoo thiab qhov loj ntawm cov khoom. Lub pwm lossis pwm tuaj yeem tsim los tsim ntau yam khoom, xws li cov kav dej, cov ntaub ntawv, daim ntawv, zaj duab xis, lossis cov granules. Cov txheej txheem shaping yog cuam tshuam los ntawm cov qauv ntawm lub pwm, lub siab ntawm lub pwm, qhov kub ntawm lub pwm, thiab kev yaj rheology. Cov txheej txheem shaping yuav tsum tau kho kom ua tiav cov extrudates sib xws thiab du yam tsis muaj qhov tsis zoo, xws li lub pwm swell, yaj tawg, lossis qhov tsis ruaj khov. Tom qab cov txheej txheem shaping, cov extrudates raug txias, txiav, thiab sau los ntawm cov khoom siv downstream, xws li calibrators, haul-offs, cutters, thiab winders.
Xaus lus
Lub tshuab extruder conical twin screw yog ib lub tshuab ua tau ntau yam thiab siv tau zoo rau kev tsim cov khoom PVC thiab WPC los ntawm cov hmoov sib xyaw. Nws tuaj yeem muab cov haujlwm tsim nyog ntawm kev pub, yaj, devolatilization, thiab shaping hauv txoj kev txuas ntxiv thiab tswj tau. Nws kuj tseem tuaj yeem tsim ntau yam khoom nrog ntau yam duab, qhov loj me, thiab kev ua haujlwm, los ntawm kev siv cov pwm sib txawv thiab cov khoom siv downstream. Lub tshuab extruder conical twin screw muaj qhov zoo ntawm kev sib xyaw zoo, cov zis loj, kev khiav ruaj khov, thiab lub neej ua haujlwm ntev, thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm cov neeg siv khoom thiab kev ua lag luam.
Yog xav paub ntxiv los yog xav nug ntxiv, thovtiv tauj peb:
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Lub sijhawm tshaj tawm: Lub Ib Hlis-24-2024