Powder Txheej Cia thiab tuav

Hmoov Txheej Cia Thiab Tuav

Hmoov, zoo li txhua yam khoom siv txheej yuav tsum raug xa tawm, khaws cia, thiab ua haujlwm hauv nws txoj kev taug kev los ntawm cov chaw tsim khoom hmoov txheej mus rau qhov chaw ntawm daim ntawv thov. Cov neeg tsim khoom pom zoo cov hnub, cov txheej txheem, thiab cov lus ceeb toom yuav tsum ua raws. Txawm hais tias ntau yam hmoov yuav muaj cov cai tshwj xeeb, qee qhov kev cai thoob ntiaj teb siv. Nws yog ib qho tseem ceeb uas cov hmoov yuav tsum ib txwm:

• Tiv thaiv los ntawm tshav kub ntau dhau;
• Tiv thaiv los ntawm cov av noo thiab dej;
• Kev tiv thaiv los ntawm kev sib kis nrog cov khoom txawv teb chaws, xws li lwm cov hmoov, hmoov av, av, thiab lwm yam.

Cov no tseem ceeb heev, lawv tsim nyog tau piav qhia ntau ntxiv.

Thaum tshav kub kub

Cov hmoov yuav tsum tuav lawv cov particle loj kom tso cai tuav thiab siv. Feem ntau cov thermoset ting hmoov yog tsim los tiv thaiv qee qhov kev raug tshav kub hauv kev thauj mus los thiab hauv kev cia. Qhov no yuav txawv raws li hom thiab kev tsim, tab sis tuaj yeem kwv yees li ntawm 100-120 ° F (38-49 ° C) rau lub sijhawm luv luv. Thaum cov kub tseem ceeb no dhau mus rau lub sijhawm ntev, ib lossis tag nrho cov kev hloov ntawm lub cev hauv qab no yuav tshwm sim. Cov hmoov tuaj yeem sinter, ntim, thiab clump hauv lub thawv. Lub siab ntawm cov hmoov uas hnyav rau ntawm nws tus kheej (Le., qhov siab loj muaj ers) tuaj yeem ua kom lub ntim thiab clumping ntawm cov hmoov mus rau hauv qab ntawm lub thawv.

Cov neeg tsim khoom pom zoo kom khaws cia ntev ntev ntawm 80 ° F (27'C) lossis qis dua. Tshwj tsis yog tias nws raug tshav kub dhau mus rau lub sijhawm ntev, cov hmoov uas tau ntsib cov kev hloov pauv no feem ntau tuaj yeem tawg thiab rov zoo dua tom qab dhau los ntawm kev tshuaj ntsuam xyuas.

Hmoov nrog ceev ceev los yog qis-kub curing mechanisms yuav raug kev hloov tshuaj raws li qhov tshwm sim ntawm kev raug tshav kub ntau dhau. Cov hmoov no tuaj yeem ua rau qee yam los yog "B theem." Txawm hais tias cov hmoov no tuaj yeem tawg, lawv yuav tsis tsim cov dej ntws zoo ib yam thiab tshwm sim cov yam ntxwv zoo li cov hmoov tsis pom. Lawv yuav muaj, thiab irreversibly khaws cia, txwv tsis pub txaus, txawm mus rau lub point ntawm ib tug qhuav kev ntxhib los mos.

Cov hmoov uas tsim los nrog cov tshuaj thaiv cov tshuaj tiv thaiv kom tsis txhob kho hauv qab qee qhov ntsuas kub tsis zoo feem ntau "B theem" ​​ntawm tem peratures qis dua 200 ° F (93 ° C).

Tiv thaiv los ntawm cov av noo thiab dej

Dej thiab hmoov tsis sib tov thaum lub hom phiaj yog los tsuag raws li cov hmoov qhuav. Kev cuam tshuam rau cov av noo ntau dhau tuaj yeem ua rau cov hmoov nqus ntawm qhov chaw lossis cov dej noo ntau. Qhov no ua rau kev tuav tsis zoo, xws li cov kua dej tsis zoo lossis kev noj phom tsis zoo, uas tuaj yeem ua rau phom phom thiab thaum kawg pub hose txhaws. Cov ntsiab lus ntawm cov dej noo siab yuav ua rau tus cwj pwm tsis zoo electrostatic, uas tuaj yeem ua rau muaj kev hloov pauv lossis txo qis kev hloov pauv thiab, nyob rau hauv huab cua, cuam tshuam rau cov tsos thiab kev ua tau zoo ntawm cov txheej ci ci.

Tshuaj Txau

Vim tias cov hmoov txheej yog txheej txheej txheej qhuav, cov hmoov av los yog lwm yam hmoov tsis tuaj yeem raug tshem tawm los ntawm kev lim dej, xws li hauv cov xim ua kua. Nws yog ib qho tseem ceeb, yog li ntawd, tag nrho cov ntim raug kaw thiab tiv thaiv los ntawm cov nroj tsuag sib tsoo plua plav, tshuaj tsuag aerosol, thiab lwm yam.

POWDER COATING STORAGE RECOMMENDATIONS

Cov khoom ruaj khov ntawm cov hmoov txheej yuav tsum tsis txhob ua teeb meem ntawm tus neeg siv khoom kawg, muab qee qhov kev ceev faj yooj yim. Ntawm cov kev ceev faj no yog:

• 1. Tswj kub, 80 ° F (27 ° C) lossis tsawg dua. Nco ntsoov tias hmoov yuav tsum tau qhov chaw cia tsawg kawg nkaus. Piv txwv li, ib lub tsheb laij teb semi-trailer-qhov loj me tuaj yeem ua tau 40,000 lbs. (1 8,143 kg) hmoov, uas yog kwv yees li mately sib npaug rau 15,000 nkas loos (56,775L) ntawm cov kua pleev xim rau ntawm daim ntawv thov khib nyiab.
• 2. Ua haujlwm zoo tig cov hmoov uas khaws cia kom txo tau lub sijhawm khoom muag tsawg. Hmoov yuav tsum tsis txhob muab khaws cia rau lub sijhawm dhau qhov chaw tsim khoom pom zoo.
• 3. Tsis txhob qhib pob khoom ntawm cov hmoov hauv khw hauv pem teb kom tiv thaiv kom tsis txhob muaj dej noo thiab paug.
• 4. Precondition hmoov ua ntej tshuaj tsuag daim ntawv thov tion los ntawm kev muab preconditioning fluidiza tion, raws li muaj nyob rau ntawm ib co tsis siv neeg tshuab, los yog los ntawm kev ntxiv nkauj xwb hmoov los ntawm reclaim system. Cov txheej txheem no yuav tawg cov hmoov yog tias me me agglomeration tau tshwm sim hauv pob.
• 5. Ua kom cov hmoov hloov ua kom zoo tshaj plaws hauv lub rooj muag khoom kom tsis txhob muaj teeb meem cuam tshuam nrog kev rov ua dua cov hmoov ntau.
• 6. Txo cov hmoov txheej ntawm cov khoom siv hauv tsev yog tias kub thiab av noo

KEV RUAJ NTSEG

Cov hmoov coatings muaj cov polymers, curing agents, pigments, thiab fillers uas yuav tsum tau muaj kev nyab xeeb tuav cov txheej txheem thiab tej yam kev mob. Pigments yuav muaj cov hlau hnyav, xws li txhuas, mercury, cadmium, thiab chromium. Kev tuav cov khoom uas muaj cov ntsiab lus no yog tswj hwm los ntawm OSHA cov cai. Kev siv kawg yuav raug txwv raws li Consumer Product Safety Commission Regulations.

Raws li qee qhov xwm txheej, OSHA cov kev cai xav kom tus neeg thov kev pab qhia cov neeg ua haujlwm ntawm cov kev phom sij cuam tshuam nrog kev tuav qee cov khoom siv los yog cov hmoov txheej. Tus neeg thov raug qhia kom tau txais cov ntaub ntawv no los ntawm tus neeg muag khoom hauv daim ntawv ntawm Cov Ntaub Ntawv Kev Nyab Xeeb Cov Ntaub Ntawv. Cov hmoov coatings yuav tsum tau ua tib zoo saib xyuas kom txo tau ob qho tib si ntawm daim tawv nqaij thiab ua pa tawm raws li cov lus pom zoo ntawm Cov Ntaub Ntawv Kev Nyab Xeeb Cov Ntaub Ntawv. Cov tshuaj tiv thaiv kev noj qab haus huv pom tau tias yog vim li cas cov hmoov txheej txheej yuav tsum raug xa mus rau physi cian sai li sai tau.

Qhib, tshem tawm, thiab tuav cov thawv ntim hmoov, xws li lub thawv thiab hnab, feem ntau nthuav tawm cov neeg ua haujlwm loj tshaj plaws, txawm tias muaj cov txheej txheem tsim tau zoo. Kev coj ua engineering, cov cuab yeej tiv thaiv tus kheej, thiab kev nyiam huv ntawm tus kheej yuav tsum tau siv los txwv qhov raug. Hauv kev tsim cov tshuaj tsuag zoo, yuav tsum muaj qhov tsis zoo ntawm cov neeg ua haujlwm rau plua plav. Hmoov txheej, vim lawv qhov loj me me thiab feem pua ​​​​ntawm TiO feem ntau, yuav nqus dej noo thiab roj tau yooj yim.

Yog tias cov hmoov cia nyob rau hauv kev sib cuag nrog daim tawv nqaij rau lub sij hawm ntev, nws zoo li qhuav tawm ntawm daim tawv nqaij. Txhawm rau tiv thaiv qhov no, cov hnab looj tes thiab cov khaub ncaws huv yuav tsum tau hnav los ntawm cov neeg ua haujlwm. Cov neeg ua haujlwm ntawm phau ntawv siv phom electrostatic yuav tsum yog hauv av. Txhawm rau tiv thaiv kom tsis txhob nqa hmoov av tawm ntawm qhov chaw ua haujlwm, cov neeg ua haujlwm yuav tsum hloov khaub ncaws ua ntej tawm hauv chaw ua haujlwm. Yog tias cov hmoov nkag mus rau ntawm daim tawv nqaij, nws yuav tsum tau ntxuav tawm thaum lub sijhawm yooj yim tshaj plaws, tsawg kawg ntawm hnub kawg. Cov neeg ua haujlwm uas pom cov tawv nqaij tshwm sim thaum raug cov hmoov yuav tsum tau ceev faj tshwj xeeb kom ntxuav tsis tu ncua. Ntxuav lub sfin nrog cov kuab tshuaj organic yog ib qho kev xyaum tsis zoo uas yuav tsum tau txwv. GeneralYog lawm, kev ntxuav nrog xab npum thiab dej yog qhov kev coj ua kom huv si. Ntxiv cov ntaub ntawv hais txog yuav tsum tau txais los ntawm tus neeg muag khoom Cov Ntaub Ntawv Kev Nyab Xeeb Cov Ntaub Ntawv.

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