Vim li cas PPGI Coils Qhia Xim txawv: Ua rau thiab Kev Tiv Thaiv hauv Coil Txheej
Feb 27, 2024
Tso lus
1. Deg Pretreatment ua ntej txheej
PPGI (pre-painted galvanized hlau) coil yuav tsum tau degreasing zoo thiab tshuaj kho mob ua ntej yuav pleev xim rau. Feem ntau, cov tshuaj kub alkaline yog siv rau degreasing - piv txwv li, lub siab txau ntawm li 0.1 MPa nrog 0.5-1.5% sodium hydroxide aqueous tov uas muaj me me ntawm sodium polyphosphate ntawm 60 degree. Electrolytic degreasing kuj tseem siv rau hauv qee cov kab.
Nylon txhuam kom tshem tawm qhov adhesion thiab npaj ib qho chaw huv si rau kev kho tshuaj; lawv yuav tsum tau siv qis dua 60℃vim tias nylon tsis muaj cua sov.
Tshuaj kho mob ua ib zaj duab xis hloov dua siab tshiab ntawm qhov chaw los ntawm kev txau los yog dipping; cov kua hloov pauv yog xaiv raws li cov hlau substrate (hlau oxide lossis phosphate hom rau txias-cov ntawv dov).
Rau kev txhim kho corrosion kuj, passivation nrog cov tshuaj chromate ntawm 0.1-0.5% chromium cov ntsiab lus yog siv. Cov dej ntxuav tu muaj chromium thiab yuav tsum tau ntxuav kom huv ua ntej tso; rau kev xa tawm mus rau kev lag luam txwv, chromium- pub dawb passivation yuav tsum raug txiav txim siab.
Ntsiab Cai
- Kev kho kom zoo ntawm qhov chaw (alkaline degreasing, txhuam, kev hloov pauv-zaj duab xis thiab passivation) nteg lub hauv paus rau cov xim zoo adhesion thiab corrosion kuj ntawm PPGI coils.
- PPGI xim-qhov txawv ntawm qhov tsis xws luag feem ntau tshwm sim los ntawm kev hloov pauv-zaj duab xis teeb meem, xim batch fluctuation thiab substrate spangle variation; Lub teeb-xim cov khoom yog cov rhiab heev rau spangle inconsistency.
- Xim sib txawv yog suav los ntawm ΔE (CIELAB); Tus qauv lees txais ib txwm nyob hauv ib pawg yog ΔE Tsawg dua lossis sib npaug ntawm 1-2, kuaj ib GB / T 13448 lossis ASTM D2244.
- Kev tswj kom zoo yuav tsum npog cov txheej txheem ua ntej, xim sib xyaw & viscosity, xaiv substrate thiab tag nrho cov txheej txheem ntau lawm traceability.
- Rau EU thiab lwm yam kev lag luam uas txwv ib puag ncig, chromium-free passivation yog pom zoo.
Tsis meej pem txog kev xaiv substrate, hom passivation lossis ΔE kam rau ua rau koj qhov project PPGI?
Peb pawg kws tshaj lij tuaj yeem muab cov ntaub ntawv-qib pub dawb thiab cov txheej txheem-cov lus qhia rau kev siv lub ru tsev, cladding lossis khoom siv.
Xav tias dawb tau txais kev sab laj kev sib tham ib leeg.
2. Lub ntsiab ua rau xim txawv
| Ua rau | Mechanism | Tej yam tshwm sim |
|---|---|---|
| 1. Txheej txheej txheem tsis raug | Conversion zaj duab xis tuab heev, tsis txaus ziab kub, los yog puas txheej rau cov menyuam | Cov pob daj tom qab ziab, tshwj xeeb tshaj yog nyob rau xim xim |
| 2. Xim mob | Kev sib xyaw xim tsis sib xws, qhov sib txawv loj ntawm cov khoom sib txawv, lossis kev ntxuav tsis huv thaum hloov xim | Xim- sib txawv bands hla lub coil dav |
| 3. Spangle loj variation | Txawv spangle qhov ntau thiab tsawg tsim cov qhov sib txawv ntawm qhov sib txawv ntawm cov ciam teb, tawg lub teeb tsis sib xws | Patchy tsos ntawm lub teeb xim |
3. Xim txawv li cas ntsuas
Xim txawv yog ntsuas nrog spectrophotometer tiv thaiv tus qauv siv thiab qhia raws li ΔE (CIELAB). Cov qauv kev sim ntau suav nrog GB / T 13448 (cov txheej txheem xim txheej kuaj) thiab ASTM D2244. Kev kam lees txais yog ib txwm pom zoo ntawm tus neeg muag khoom thiab tus neeg yuav khoom - feem ntau ΔE Tsawg dua lossis sib npaug rau 1–2 rau pom ntxoov ntxoo sib piv hauv ib pawg.
4. Kev tiv thaiv
- Tswj hloov dua siab tshiab zaj duab xis hnyav thiab ziab kub nyob rau hauv lub qhov rais txheej txheem; tuav cov txheej txheem txheej.
- Sib tov xim kom huv si thiab standardize viscosity ntawm batch; ntxuav lub tshuab txheej kom tiav thaum hloov xim, tshwj xeeb tshaj yog nyob nruab nrab ntawm siab - sib piv ntxoov.
- Xaiv qhov tsis muaj -spangle lossis me-spangle substrate rau cov xim teeb.
- Siv tib tus neeg muab xim xim thiab batch rau kev tsim khoom tas mus li; khaws cov ntaub ntawv rau traceability.
5. Cov lus xaus
Cov xim sib txawv hauv PPGI coil yog qhov saum npoo - qhov teeb meem zoo nrog cov txheej txheem txheeb xyuas tau. Los ntawm kev tswj xyuas qhov zoo ntawm pretreatment, xim sib xws thiab substrate spangle qauv - thiab los ntawm kev txheeb xyuas cov txiaj ntsig tawm tsam ΔE tolerances - cov tuam txhab tuaj yeem khaws cov xim sib xws hauv qhov tshwj xeeb.
Thov PPGI Coil Daim Ntawv Pom Zoo & Nqe Lus
GNEE muab cov khoom zoo siab prepainted galvanized PPGI coils nrog chromate lossis chromium-free passivation xaiv. Peb txhawb nqa kev cai substrate, zinc txheej hnyav, RAL xim, xim txheej txheem (PE / SMP / PVDF), thiab nruj me ntsis tswj cov xim sib txawv ntawm cov neeg siv khoom pom zoo ΔE cov cai. Daim ntawv qhia txog kev sim tag nrho muaj nyob rau txhua qhov khoom xa tuaj.
Ua siab zoo qhia koj cov phiaj xwm tseem ceeb hauv qab no rau kev daws teeb meem:
- Kev ua haujlwm ib puag ncig (hauv av / ntug hiav txwv / chaw ua haujlwm)
- Substrate hom, zinc txheej loj, xim system
- Target xim tooj, txais ΔE kam rau ua
- Daim ntawv thov (ru tsev / phab ntsa cladding / khoom siv hauv tsev), coil dimension thiab txiav txim kom muaj nuj nqis
Xa koj cov specifications rau peb. Peb pab neeg ua haujlwm engineering yuav teb tsis pub dhau 24 teev nrog cov lus pom zoo thiab kev sib tw Hoobkas nqi.
