Configuration ntawm Powder Coating Application Equipment

Muaj ntau txoj hauv kev los thov hmoov txheej cov ntaub ntawv; thiab muaj sevral hmoov txheej daim ntawv thov khoom siv rau kev xaiv. Txawm li cas los xij, cov khoom siv uas yuav tsum tau siv yuav tsum yog hom sib xws. Piv txwv li, yog hais tias tus txheej txheem ntawm daim ntawv thov yog fluidized txaj. Tom qab ntawd cov hmoov txheej yuav tsum yog qib fluidized txaj, Hloov pauv, yog tias cov txheej txheem ntawm daim ntawv thov yog electrostatic tsuag, ces cov hmoov khoom yuav tsum yog qib electrostatic tsuag.

Thaum cov khoom raug xaiv raug, ces cov txheej txheem ntawm daim ntawv thov raug xaiv los ntawm ib feem tsim thiab cov hom phiaj ntau lawm. Muaj ob daim ntawv thov txheej txheem. Cov no sib txawv raws li cov ntawv thov lawv haum.

Cov qauv no yog:

1. Fluidized txaj siv
2. Daim ntawv thov tshuaj tsuag.

FLUIDIZED BED

Txoj kev ntawm daim ntawv thov no yog thawj tus siv los siv cov hmoov txheej txheej. Nws tseem siv niaj hnub no ntawm ntau daim ntawv thov qhov twg tom qab kho cov yeeb yaj kiab thickness yog siab dua 5.0 mils. Cov khoom siv yog cov khoom siv hlau, hluav taws xob tsheb npav, thiab lwm yam.

Txoj kev siv lub txaj fluidized tuaj yeem ua tau ob txoj hauv kev. Ib txoj kev yog cov. Qhov no yog ib txoj kev uas yuav tsum tau preheating ib feem kom cov hmoov yuav yaj thiab ua raws li nws. Qhov kub yog muab tso rau hauv lub txaj fluidized ntawm hmoov rau txheej. Tus nqi ntawm cov hmoov uas siv rau ntawm ib feem yog qhov ua haujlwm ntawm qhov kub npaum li cas thiab ntev npaum li cas nws nyob hauv txaj. Nws yog qhov pom tseeb tias kev tswj cov yeeb yaj kiab thickness tsis yog qhov kev txhawj xeeb tseem ceeb thaum siv txoj kev no.

Txhawm rau kom tau txais kev tswj hwm ntau ntawm cov yeeb yaj kiab thickness ntawm ib feem, nrog rau lub txaj fluidized, cov ntsiab lus ntawm electrostatics tau qhia. Raws li pom nyob rau hauv daim duab 1, ib feem yog thauj saum lub txaj fluidized thiab cov hmoov yog attracted rau nws. Qhov tam sim no yuav tsum tsis muaj preheating ua ntej muab tso rau saum txaj. Cov hmoov yog attracted rau ib feem los ntawm ib tug electrostatic nqi ntawm cov hmoov particle. Qhov no electrostatic nqi yog tsim nyob rau hauv ib tug electrostatic teb sab saum toj los yog nyob rau hauv lub txaj fluidized.

Cov zaj duab xis thickness ntawm ib feem tam sim no tswj tsis tau tsuas yog lub sij hawm ntawm lub sij hawm nyob rau hauv lub fluidized txaj, tab sis kuj npaum li cas electrostatic nqi nyob rau hauv cov hmoov particle. Thaum tshav kub kub tseem qee zaum siv rau hauv cov txheej txheem no kom kov yeej qhov kev teeb tsa uas yuav ua rau Faraday teeb meem hauv tsev.

Txoj kev ntawm daim ntawv thov no yog siv rau txheej hluav taws xob lub cev muaj zog armatures. Cov no xav tau lub siab dielectric lub zog txheej nrog cov yeeb yaj kiab tuab tswj kom tso cai rau cov hlau kom raug mob kom zoo.

Fluidized txaj Kev tsim kho sib txawv nrog txhua lub chaw tsim khoom; Txawm li cas los xij, tib lub ntsiab lus tseem ceeb yog siv hauv txhua qhov tsim. Cov khoom no yog lub hopper los yog tank, lub plenum los yog cua chamber, thiab lub phaj fluidizing. Cov ntaub ntawv sib txawv yog siv rau txhua yam ntawm cov khoom no nyob ntawm kev tsim, chaw tsim khoom, thiab kev siv kawg. Piv txwv li, lub phaj fluidizing tuaj yeem ua los ntawm porous polyethylene, suab board, ntawv paj ntaub, lossis cov khoom ntxeem tau lossis cov ntaub ntawv sib xyaw. Lub tank tuaj yeem ua los ntawm txhua yam khoom uas tuaj yeem txhawb nqa qhov hnyav ntawm cov hmoov.

THOV APPLICATION

Cov txheej txheem ntawm kev siv cov hmoov txheej nrog cov khoom siv electrostatic txau yog tawg ua ob hom. Nyob rau hauv ob qho tib si electrostatics yuav tsum tau siv los nyiam cov hmoov mus rau ib feem.Tere yog tsis muaj mechanical attraction los yog adhesion los tuav. Cov hmoov mus rau ib feem raws li pom nyob rau hauv cov kua tshuaj tsuag tshuab. Yog li ntawd, cov hmoov yuav tsum tau them, los yog ib feem rhuab (thermal attraction), yuav tsum tau attracted rau lub substrate. Qhov kev sib piv zoo tshaj plaws los piav qhia qhov no yog tias yog tias koj rub lub zais pa tawm tsam koj cov plaub hau, nws yuav lo rau ntawm phab ntsa vim yog cov nqi hluav taws xob electrostatic. Tib lub zais pa yuav tsis lo rau ntawm phab ntsa yam tsis muaj tus nqi electrostatic. Qhov kev sim no yuav tsum tau ua nyob rau ib hnub qhuav (tsis ntub). Ob hom electrostatic tsuag hmoov txheej daim ntawv thov cov cuab yeej yog:

1. corona them phom phom.
2. Tribo them phom phom

Amperage txwv, kev caij tsheb kauj vab tam sim no lossis daim ntawv thov tam sim no ncua sij hawm lub sijhawm txheej txheej, vim nws yog siv ampere-seconds (coulombs) uas tsim cov electrodeposit.

Kev siv tam sim no yog li ntawm 15 coulombs ib gram ntawm lub tsho tiav mus txog 150 coul / g. Tom qab thawj zaug amperage surge, lub siab hluav taws xob tsis kam ntawm cov yeeb yaj kiab uas tau tso tawm tshiab yuav txo qis cov dej ntws tam sim no, ua rau lub ove.rall xav tau ntawm ob mus rau plaub amp ib square feet rau ib mus rau peb feeb, los yog nruab nrab ntawm ib thiab peb kilowatt teev ib 100 square feet. Lub sij hawm txheej txheej feem ntau yog los ntawm ib mus rau peb feeb. Rau qee qhov haujlwm tshwj xeeb, xws li xov hlau. steel bands, thiab lwm yam., txheej lub sij hawm tsawg li rau lub vib nas this tau tshaj tawm.

Qhov yuav tsum tau muaj hluav taws xob yog feem ntau hais los ntawm qhov xwm txheej ntawm cov resin dispersed hauv da dej. Kev teeb tsa feem ntau ua haujlwm ntawm 200 thiab 400volts, tab sis qee qhov tau tshaj tawm tias ua haujlwm tsawg li 50 volts thiab lwm tus siab txog 1000 volts.

Yaug:

Freshly coated pieces, thaum nqa los ntawm da dej, nqa cov da dej da dej thiab txawm tias cov xim pleev xim. Ib tug siab concentration ntawm cov xim khib nyiab muaj nyob rau hauv ib ncig ntawm ib tug workpiece uas yog coated. Nws yog kwv yees tias lub tsheb lub cev muaj peev xwm nqa tau (txiav tawm) txog 1 nkas loos da dej. Ntawm 10wt% non-volatiles qhov no yog kwv yees li 1 lb. solids. Xav txog kev tsiv teb tsaws ntawm cov khib nyiab rau ntawm qhov chaw uas tau coated, cov khib nyiab ntau txog li 35% yuav tsum nyob hauv lawv qhov chaw. Yog li, nws yog qhov tseeb tias qhov kev rov qab los ntawm cov xim pleev xim da dej yog qhov tsim nyog, thiab txoj kev muaj txiaj ntsig tau pom nyob rau hauv daim ntawv ntawm "Ultrafiltrate yaug."

Ultrafiltration siv daim nyias nyias uas tso cai rau cov dej ntws thiab cov khoom yaj tiag tiag, xws li cov kuab tshuaj, cov kuab tshuaj, cov ntsev (impurities!), thiab lwm yam. Dispersed xim resins, pigments, thiab lwm yam yog khaws cia los ntawm daim nyias nyias. Ib puas los yog ntau nkas loos da dej hla ntawm ib sab ntawm daim nyias nyias nyob rau hauv siab, thaum ib nkas loos dej ntshiab aqueous dhau los ntawm daim nyias nyias. Cov kua dej, hu ua permeate lossis ultrafiltrate, yog sau thiab siv los ua cov kua dej yaug (Fig. 7). Peb-theem yaug qhov system rov qab tau kwv yees li 85% ntawm cov xim pleev xim uas tau muab tshem tawm hauv da dej.

Qee zaum cov khoom siv ultrafiltrate raug muab pov tseg, uas yuav tsum tau thauj khoom mus rau qhov chaw pov tseg. Qhov ntim ntawm cov khib nyiab no tuaj yeem txo los ntawm rov qab osmosis.

Ci los yog Kho:

Lub sij hawm / qhov kub thiab txias yuav tsum tau kho yog txiav txim los ntawm cov txheej txheem resin thiab zoo ib yam li cov uas yuav tsum tau rau cov pa dip los yog tshuaj tsuag xim - feem ntau 5-25 feeb ntawm 250'F txog 400 ° F huab cua kub. Cua ziab electrocoats yog nyob rau hauv kev ua lag luam.

KHOOM

Txheej Tank.

Ob hom tank yog siv:

1. Lub tank phab ntsa yog siv los ua counter-electrode.
2. Lub tank phab ntsa yog lined nrog ib lub tsho tiv thaiv hluav taws xob, thaum cov khoom siv hluav taws xob tau muab tso rau hauv lub tank thiab tom qab ntawd muab tso rau raws li qhov loj lossis cov duab ntawm cov khoom ua haujlwm. Cov electrodes yog nyob rau hauv ib co kev teeb tsa ib puag ncig los ntawm compartments, ib sab ntawm uas yog tsim los ntawm ib daim nyias nyias. Cov txee ions "X" lossis "Y" (Table 1) khaws cia hauv cov khoom siv hluav taws xob los ntawm cov txheej txheem hu ua electrodialysis, thiab muab pov tseg lossis rov siv dua.

Kev ntxhov siab:
Cov twj tso kua mis, cov raj xa dej, kab shafts thiab ejector-nozzle systems muaj peev xwm txav lossis tig tag nrho cov ntim da dej hauv 6 mus rau 30 feeb yog siv los tiv thaiv cov xim los ntawm kev nyob hauv lub tank.

Kev piav qhia:
Raws li txoj cai, 5 mus rau 75 micron pore loj lim tau siv los hla tag nrho cov xim ntim los ntawm cov lim hauv 30 mus rau 120 feeb. Cov khoom noj acidic yog tsim thiab xa tawm ntawm cov xim khib nyiab ntau ntawm 40% txog 99+%. Hauv qee qhov kev teeb tsa, cov khoom noj yog ntsuas rau hauv lub tank hauv daim ntawv ntawm ob lossis ntau yam khoom, ib qho khoom siv yog cov cob, lwm yam khoom yog xim slurry, thiab lwm yam.

Txoj kev tshem tawm Solubilizer:

Txhawm rau kom da dej hauv kev ua haujlwm, kev tshem tawm cov khoom seem solubilizer tau ua tiav los ntawm electrodialysis, ion exchange, lossis dialysis method.

Cov khoom siv cua txias:

Xyaum tag nrho cov siv hluav taws xob siv hluav taws xob hloov mus rau hauv tshav kub. Cov khoom siv cua txias yuav tsum tsim nyog kom tswj tau qhov xav tau da dej kub, feem ntau ntawm 70 ° F thiab 90F, raws li tau teev tseg los ntawm cov neeg muab xim.

Ci los yog kho:

Cov pa hom qhov cub yog siv. Cov cua tshaj tawm los ntawm qhov cub yog com-paratively tsawg, vim muaj tsawg heev ntawm cov organic volatiles nyob rau hauv cov xim pleev xim.

Hwj chim qhov chaw:

Rectifiers uas xa ncaj qha tam sim no tsawg dua 10% ripple yam feem ntau tau teev tseg. Ntau yam kev tawm hluav taws xob tawm hluav taws xob tau siv, xws li kais keyboards, induction regulators, saturable core reactors, thiab lwm yam. Voltages nyob rau hauv 50 mus rau 500V ntau yog muab. Qhov kev xav tau tam sim no yog xam los ntawm qhov hnyav ntawm cov txheej txheem los siv rau lub sijhawm muaj.