Txoj kev ntsuas ib qho hnyav (txoj kev thauj khoom hnyav tas li) yog ib qho ntawm cov txheej txheem sim uas siv ntau rau cov cuab yeej ntsuas qhov ntsuas ntawm cov dej ntws (MFR) -YYP-400E;
Lub hauv paus ntawm txoj kev no yog siv qhov hnyav tas li rau cov yas uas yaj siv qhov hnyav ruaj khov, thiab tom qab ntawd ntsuas qhov hnyav ntawm cov khoom yaj uas ntws los ntawm tus qauv pwm ntawm qhov kub thiab sijhawm tshwj xeeb los xam tus nqi ntws. Nws cov txiaj ntsig feem ntau pom tseeb hauv ntau yam xws li kev ua haujlwm, qhov tseeb, kev siv tau, thiab tus nqi. Cov ntsiab lus yog raws li nram no:
1. Cov txheej txheem ua haujlwm yooj yim thiab ncaj nraim, nrog rau kev ncaj qha. Txoj kev ib pawg tsuas yog xav tau kev teeb tsa ntawm cov qhov hnyav ruaj khov thiab tsis xav tau cov khoom siv hloov pauv hnyav. Thaum lub sijhawm sim, tsuas yog cua sov cov qauv kom yaj, thauj cov qhov hnyav ruaj khov, teem sijhawm nws, thiab sau cov khoom siv yaj uas ntws. Cov kauj ruam yog ob peb thiab cov qauv siab, nrog rau cov kev txawj ntse tsawg rau cov neeg teb xov tooj, thiab nws tuaj yeem ua tau sai thiab rov ua dua. Piv nrog rau txoj kev thauj khoom hloov pauv (xws li kev sim ntau qhov hnyav rau qhov ntim ntws ntawm cov dej yaj MVR), nws tshem tawm qhov xav tau hloov cov qhov hnyav thiab calibrate cov khoom thauj, txo qis lub sijhawm npaj rau ib qho kev sim.
2. Cov ntaub ntawv xeem ruaj khov heev thiab qhov yuam kev tswj tau. Nyob rau hauv qhov kev thauj khoom tas li, qhov kev ntxhov siab ntawm cov khoom siv molten yog ruaj khov, qhov nrawm yog sib xws, thiab qhov kev hloov pauv ntawm cov khoom siv molten sau yog me me, ua rau muaj kev rov ua dua zoo ntawm tus nqi MFR. Qhov tseeb zoo ntawm qhov hnyav tuaj yeem tswj tau nruj me ntsis los ntawm kev ntsuas (nrog qhov tseeb ntawm ± 0.1g), zam kev ua yuam kev ntxiv los ntawm kev sib xyaw ua ke ntawm qhov hnyav thiab kev sib kis hauv txoj kev thauj khoom hloov pauv. Qhov no yog qhov tshwj xeeb tshaj yog rau kev sim meej ntawm cov yas qis-flow (xws li PC, PA) lossis cov yas siab-flow (xws li PE, PP).
3. Cov qauv khoom siv tau yooj yim, tus nqi qis dua, thiab kev saib xyuas yooj yim. Cov cuab yeej MFR siv txoj kev ib leeg tsis xav tau lub kaw lus kho qhov hnyav nyuaj (xws li kev thauj khoom hluav taws xob, khaws qhov hnyav), thiab cov khoom siv me dua, nrog cov khoom tsawg dua, ua rau tus nqi yuav khoom qis dua 20% txog 40% piv rau ntau hom cuab yeej hnyav. Kev saib xyuas txhua hnub tsuas yog xav tau calibrating qhov hnyav ntawm qhov hnyav, ntxuav lub pwm thiab lub thoob, thiab tsis tas yuav saib xyuas lub cev xa lossis tswj hwm. Tus nqi ua tsis tiav qis, lub voj voog saib xyuas ntev, thiab nws tsim nyog rau kev tshuaj xyuas zoo niaj hnub hauv cov lag luam me thiab nruab nrab lossis chaw soj nstuam.
4. Nws ua raws li cov qauv kev cai thiab tsim nyog rau cov xwm txheej tshuaj xyuas zoo. Txoj kev ib pawg ua tau raws li cov qauv tseem ceeb xws li ISO 1133-1 thiab ASTM D1238, thiab yog ib txoj kev ib txwm muaj rau kev tshuaj xyuas cov khoom siv yas raw thiab kev tswj xyuas zoo ntawm cov txheej txheem tsim khoom. Rau kev tshuaj xyuas lub Hoobkas ntawm feem ntau cov yas dav dav (xws li PE, PP, PS), tsuas yog qhov hnyav ruaj khov (xws li 2.16kg, 5kg) xwb thiaj li yuav tsum ua tiav qhov kev xeem, tsis tas yuav hloov kho qhov ntsuas ntxiv, thiab nws tsim nyog rau cov kev xav tau ntawm kev tshuaj xyuas zoo hauv kev lag luam loj.
5. Cov ntaub ntawv tau los ntawm cov ntaub ntawv no yooj yim to taub thiab siv tau rau kev sib piv. Cov ntaub ntawv xeem tau muab tso tawm ncaj qha hauv "g/10min" units, thiab qhov loj ntawm cov lej qhia txog qhov fluidity ntawm cov khoom molten, ua rau nws yooj yim los sib piv kab rov tav ntawm cov pawg sib txawv thiab cov chaw tsim khoom ntawm cov khoom siv raw. Piv txwv li: rau tib hom PP raw khoom, yog tias MFR ntawm pawg A yog 2.5g/10min thiab ntawm pawg B yog 2.3g/10min, nws tuaj yeem txiav txim siab ncaj qha tias pawg A muaj fluidity zoo dua, tsis tas yuav hloov pauv lossis ua cov ntaub ntawv nyuaj.
Yuav tsum nco ntsoov tias qhov kev txwv ntawm ib txoj kev zoo yog nws tsis muaj peev xwm ntsuas qhov kev vam khom ntawm qhov shear rate ntawm cov yaj. Yog tias ib tug xav tau kawm txog cov khoom rheological ntawm cov yas nyob rau hauv ntau qhov hnyav, yuav tsum siv cov cuab yeej MVR ntau hom lossis capillary rheometer ua ke.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-13-2025