Cov tuam txhab tsim cov txheej txheem hais tias cov txheej txheem dej-dilutable xa mus rau cov txheej txheem npaj los ntawm emulsions ua cov ntaub ntawv tsim zaj duab xis, uas cov tshuaj resins raws li cov kuab tshuaj tau yaj hauv cov kuab tshuaj organic, thiab tom qab ntawd, nrog kev pab los ntawm emulsifiers, cov resins tau tawg hauv dej los ntawm kev sib xyaw ua ke kom tsim cov emulsions, hu ua post-emulsion, tuaj yeem diluted nrog dej thaum lub sijhawm tsim kho.
Cov xim uas ua los ntawm kev ntxiv me ntsis emulsion rau hauv cov resin uas yaj hauv dej tsis tuaj yeem hu ua xim latex. Hais meej meej, cov xim uas ua rau dej nyias tsis tuaj yeem hu ua xim latex, tab sis nws kuj raug cais ua xim latex raws li kev lig kev cai.
Cov txiaj ntsig thiab qhov tsis zoo ntawm cov txheej txheem dej
1. Siv dej ua cov tshuaj yaj yuav txuag tau ntau yam khoom siv. Kev phom sij ntawm hluav taws thaum lub sijhawm tsim kho raug zam thiab txo cov pa phem. Tsuas yog siv me ntsis ntawm cov tshuaj solvent uas tsis muaj kuab lom, uas ua rau qhov chaw ua haujlwm zoo dua.
2. Cov kuab tshuaj organic ntawm cov xim pleev xim dej ib txwm muaj nyob nruab nrab ntawm 10% thiab 15%, tab sis cov xim cathodic electrophoretic tam sim no tau raug txo kom tsawg dua 1.2%, uas muaj cov txiaj ntsig pom tseeb rau kev txo cov pa phem thiab txuag cov peev txheej.
3. Qhov kev ruaj khov ntawm kev sib kis mus rau lub zog muaj zog tsis zoo. Thaum qhov ceev ntawm cov dej ntws hauv cov kav dej xa khoom sib txawv heev, cov khoom tawg tau raug nias ua cov khoom khov, uas yuav ua rau muaj qhov pitting ntawm cov zaj duab xis txheej. Nws yog qhov yuav tsum tau ua kom cov kav dej xa khoom zoo thiab phab ntsa yeeb nkab tsis muaj qhov tsis zoo.
4. Nws yog corrosive heev rau cov khoom siv txheej. Yuav tsum tau siv cov ntaub ntawv uas tiv taus corrosion lossis cov hlau tsis xeb, thiab tus nqi ntawm cov khoom siv kuj kim heev. Kev xeb thiab cov hlau yaj ntawm cov kav dej xa khoom tuaj yeem ua rau muaj nag thiab pitting ntawm cov khoom tawg ntawm cov zaj duab xis txheej, yog li cov kav dej hlau tsis xeb kuj siv tau.
Kev siv xim tiav thiab txoj kev tsim kho ntawm cov chaw tsim xim
1. Kho cov xim kom haum rau qhov viscosity tsuag nrog dej huv, thiab ntsuas qhov viscosity nrog Tu-4 viscometer. Qhov viscosity tsim nyog feem ntau yog 2 txog 30 vib nas this. Tus neeg tsim xim hais tias yog tias tsis muaj viscometer, koj tuaj yeem siv txoj kev pom los do cov xim nrog tus pas hlau, do kom siab txog 20 cm thiab nres saib.
2. Lub zog cua yuav tsum tswj tau ntawm 0.3-0.4 MPa thiab 3-4 kgf/cm2. Yog tias lub zog qis dhau, cov xim yuav tsis atomize zoo thiab qhov chaw yuav pitted. Yog tias lub zog loj dhau, nws yooj yim rau sag, thiab cov xim pa phem dhau los ua pov tseg cov khoom thiab cuam tshuam rau kev noj qab haus huv ntawm cov neeg ua haujlwm tsim kho.
3. Qhov nrug ntawm lub nozzle thiab qhov chaw ntawm cov khoom yog 300-400 hli, thiab nws yooj yim rau sag yog tias nws nyob ze dhau. Yog tias nws nyob deb dhau, cov xim pleev xim yuav tsis sib npaug thiab yuav muaj qhov. Thiab yog tias lub nozzle nyob deb ntawm qhov chaw ntawm cov khoom, cov xim pleev xim yuav nthuav tawm ntawm txoj kev, ua rau muaj kev pov tseg. Tus neeg tsim khoom xim tau hais tias qhov nrug tshwj xeeb tuaj yeem txiav txim siab raws li hom xim, viscosity thiab cua siab.
4. Lub phom tsuag tuaj yeem txav mus rau saum thiab nqis, sab laug thiab sab xis, thiab tuaj yeem khiav sib npaug ntawm qhov ceev ntawm 10-12 m / feeb. Nws yuav tsum ncaj thiab tig ncaj qha rau ntawm qhov chaw ntawm cov khoom. Thaum tsuag rau ob sab ntawm qhov chaw ntawm cov khoom, txhais tes uas rub lub pob ntawm rab phom tsuag yuav tsum tau tso tawm sai sai. Qhib, qhov no yuav txo cov xim pos huab.
Lub sijhawm tshaj tawm: Lub Ib Hlis-18-2024