Electrostatic cov hmoov txau yog cov ua tau zoo thiab ib puag ncig cov txheej txheem txheej txheem qub. Nws txoj ntsiab cai yog ua kom cov hmoov txheej ua raws li cov chaw ua haujlwm los ntawm cov txheej txheem electrostatic, thiab tom qab ntawd tsim ib co. Cov teeb meem tseem ceeb hauv qab no yuav tsum tau them ntau rau hauv kev tsim khoom los kom ntseeg tau tias muaj kev nyab xeeb ntau yam thiab ua haujlwm tau zoo:
1. Workpiece Pretricement: Lub hauv paus rau kev ua kom tiav txheej txheej adhesion
Kev ua tsis tau zoo yuav ua rau muaj teeb meem ncaj qha xws li cov txheej txheem txiav thiab blistering, uas yuav tsum tau nruj me ntsis tswj:
- Deg Tu:
Los ntawm tshem tawm impurities xws li roj, nplai, hmoov av, thiab lwm yam nyob rau saum npoo ntawm workpiece. Cov txheej txheem sib xws muaj xws li:
Tshuaj lom neeg tshuaj: Pickling (xeb tshem tawm), kev tshem tawm roj ntxiv rau kev kho cov khoom nplaum, feem ntau siv rau aluminium alloys);
NCO TSEG: Tom qab pretricative, lub workpiece xav tau kom tsis txhob muaj kev sib kis ob (xws li ntiv tes thiab yuav tsum nkag mus rau theem txau kom sai li sai tau.
- Xeev Xeev Haum:
Cov ntaub ntawv sib txawv (steel, txhuas, yas, thiab lwm yam) yuav tsum tau phim cov txheej txheem etreatment tshwj xeeb, txhuas tag nrho yuav tsum tau tshem tawm cov yeeb yaj kiab oxide thiab ua ib txheej passivation).
2. Xaiv thiab Kev Tswj Xyuas Cov Hmoov Txheej
Cov kev ua tau zoo thiab lub xeev cov txheej txheej ncaj qha cuam tshuam rau qhov zoo ntawm kev ua tau zoo, thiab saib xyuas yuav tsum tau them rau:
- Qauv Sib Tw:
Xaiv hom hmoov raws li lub hom phiaj ntawm workpiece (xws li epoxy hmoov yog haum rau huab cua tiv thaiv, thiab acrylic hmoov yog tsim rau cov gloss);
Nco ntsoov tias cov hmoov tau sib xws nrog cov khoom siv ua haujlwm (xws li Galvanized cov khoom yuav tsum zam kev siv cov hmoov acidic tiv thaiv kom tiv thaiv cov tshuaj lom neeg cov tshuaj lom neeg).
- Xeev hmoov tswj:
Particle qhov loj me me: Cov hmoov cov hmoov loj yog feem ntau 10 ~ 100μm. Ntau dhau qhov kev faib tawm loj me me yuav ua rau muaj kev sib tw tsis sib xws (coarse hmoov yog ib qho yooj yim los poob, thiab hmoov zoo yog yooj yim ya). Nws yog ib qho tsim nyog yuav tsum lim dej ntawm lub vijtsam kom tshem cov lumps lossis cov khoom loj;
Vaum tswj: Cov hmoov yuav clump thiab nws cov kua txiv hmab yuav tsis zoo tom qab nqus dej noo. Nws yuav tsum tau muab ntim thiab khaws cia rau hauv ib puag ncig qhuav (cov txheeb ze cov av noo tsawg dua lossis sib npaug rau 60%). Yog tias nws tseem noo ua ntej siv, nws yuav tsum tau qhuav (qhuav ntawm qhov kub ntawm 40 ~ 50℃kom tsis txhob mob siab dua).
3. Electrostatic txau khoom thiab parameter tswj: lub ntsiab los xyuas kom meej txheej txheej sib dhos
Khoom siv parameter nqis ncaj qha cuam tshuam ncaj qha rau cov hmoov adsorption nyhuv thiab cov txheej txheej tuab:
- Txau Phom Tes Haujlwm:
Electrostatic voltage: feem ntau 60 ~ 100kv (kho raws li hom hmoov). Yog tias tus voltage dhau lawm, nws yog ib qho yooj yim los tsim cov nyhuv "Faraday lub tawb ua haujlwm" (fab tsis txaus Yog tias qhov hluav taws xob tsawg dhau, lub zog tshaj tawm tsis muaj zog thiab cov hmoov yog yooj yim los poob tawm.
Cov hmoov tawm: kho raws qhov loj me ntawm qhov chaw ua haujlwm thiab cov txau ceev (xws li 50 ~ 100g / min rau cov me me thiab 100 ~ 300g / min rau cov ntawv loj). Cov dej tsis sib haum hmoov yuav ua rau txheej txheej tuab tuab.
Atomization cua siab: feem ntau 0.3 ~ 0.55mpa. Cov huab cua ntau dhau yuav tshuab cov hmoov, thiab cua hlob heev yuav ua rau atomization tsis zoo thiab cov txheej txheej.
Deb thiab kaum sab xis ntawm rab phom txau thiab workpiece:
Qhov kev ncua deb feem ntau khaws cia ntawm 15 ~ 30 tau. Kaw heev yuav yooj yim coj mus rau lub zos tuab txheej (soagging tom qab kho lub zog), thiab deb dhau lawm yuav ua rau muaj cov khoom pov tseg qis (pov tseg thiab kev qias neeg).
Rau cov workpieces nyuaj (xws li grooves thiab fab tsuag, thiab ntau {{{{}} phom txoj hauj lwm tsim yuav tsum tau siv kom tsis txhob "cov ceg tuag" los ntawm kev xau.
- Kev ntseeg tau:
Lub workpiece, khuam khawb ncaws, thiab conveyor saw yuav tsum tau zoo dua (ground hluav taws xob tsis tuaj yeem tso tawm, ua rau muaj hluav taws xob tsis zoo lossis sib npaug (ua rau muaj kev nyab xeeb rau kev nyab xeeb).
Nquag ntxuav cov hmoov thiab oxide txheej ntawm tus khuam khawb ncaws (zam qhov tsis zoo ntawm tus neeg hauv kev ua haujlwm thiab ua haujlwm).
4. Kev kho cov txheej txheem: Tus yuam sij rau kev txiav txim siab txheej txheej ua haujlwm
Kev kho yog cov txheej txheem ntawm cov hmoov melting, leveling, thiab hla -}} txuas. Parameter txawv txav tuaj yeem ua rau kom cov teeb tsa embrittlement, txom nyem adhesion, pom tsis ncaj, thiab lwm yam teeb meem:
- Kub thiab sijhawm:
Nruj me ntsis tswj qhov kev kho kub (xws li Epoxy Hmoov 180 ~ 200 Degree, Polyester Hmoov 160 ~ 180 feeb) thiab sijhawm siv tus pas ntsuas kub los soj ntsuam qhov kub thiab txias hauv lub sijhawm tiag tiag.
- Qhov cub ib puag ncig:
Khaws lub cub kom tsis txhob muaj cov hmoov av thiab roj paug paug rau ntawm qhov chaw ua haujlwm (tshwj xeeb yog "theem theem" ua ntej kho).
Nco ntsoov tias huab cua kub kub kom tsis txhob muaj kev sib cav thiab hlawv ntawm cov txheej los ntawm cov kub ntau hauv lub zos.
5. Cov Khoom Siv Txij Nkawm thiab Cov Hmoov Qab: Xyuas kom muaj kev tiv thaiv thiab kev tiv thaiv ib puag ncig
- Txij nkawm ntawm txau phom phom thiab cov chav hmoov:
Ntxuav cov tshuaj txau rab phom nozzle tsis tu ncua (kev hnav khaub ncaws cov quav), hnav yuav cuam tshuam rau lub zog electrostatic thiab yuav tsum tau hloov nyob rau lub sijhawm).
Sab hauv phab ntsa ntawm chav dej yuav tsum tau so kom tsis tu ncua (xws li cyclone sepetatory), thiab kev tiv thaiv kev thaiv kom tsis tu ncua (kom tiv thaiv kev tiv thaiv thiab txo ntawm hmoov).
- Hmoov kom zoo thiab tshuaj ntsuam:
Unadsorbed hmoov yuav tsum tau siv rov los ntawm txoj kev rov qab los, tab sis nws yuav tsum tau sau tseg tias:
Cov hmoov zoo thiab cov hmoov tshiab yuav tsum tau sib xyaw ua feem (feem ntau ua feem ntawm kev rov ua kom zoo dua 30% kom tsis txhob muaj kev cuam tshuam ntau dhau yuav cuam tshuam qhov zoo ntawm cov txheej);
Sab cib ua ntej sib tov (80 ~ 120 mesh npo) kom tshem cov lumps thiab txawv teb chaws.
6. Kev Nyab Xeeb Kev Nyab Xeeb thiab Ib Puag Ncig: Zam kev pheej hmoo thiab ua qias tuaj
- Hluav taws thiab tawg tiv thaiv:
Cov hmoov yog qhov sib txuas ua hmoov nplej, qhib cov nplaim taws txwv tsis pub muaj cov hmoov av, thiab cov khoom sib txuam tsis tu ncua (kom tsis txhob muaj kev sib txuam tsis tu ncua).
Cov neeg khiav lag luam yuav tsum tau hnav anti - Cov khaub ncaws zoo li qub thiab cov khoom nqus hluav taws xob (los tiv thaiv cov hluav taws xob zoo li qub los ntawm kev ua rau cov txim taws).
- Tswj plua plav:
Cov hmoov chav yuav tsum ua kom muaj kev kub siab tsis zoo (txhawm rau tiv thaiv hmoov los ntawm overflowing), thiab lub tshuab cua yuav tsum ua kom tau raws tus qauv (10-20 huab cua hloov ib teev).
Cov hmoov pov tseg yuav tsum tau kho kom tsis txhob muaj kev phom sij kom tsis txhob muaj kev tiv thaiv tawm tsam (qee cov hmoov muaj cov hlau hnyav lossis cov khoom siv tsis zoo).
7. Kev Soj Ntsuam Zoo Tshaj Plaws: Sijhawm kuaj pom thiab daws teeb meem
Cov txheej yuav tsum tau kuaj online lossis offline thaum lub sijhawm tsim khoom. Cov khoom nquag muaj xws li:
Cov tsos pom: Tshawb xyuas qhov tsis xws luag xws li pinholes, sagging, txiv kab ntxwv tev, thiab xiam txau;
Thickness: ntsuas nrog cov yeeb yaj kiab thickness (feem ntau 60-120μm, kho raws li cov kev cai) los xyuas kom muaj kev sib dhos;
Adhesion: Hla {- Txiav Kuaj (ISO 2409) kom ntseeg tau tias cov txheej tsis poob;
Hardness thiab corrosion Kuj: Mem hluav ntsuas hardness, ntsuas ntsev ua kom cov qauv tshuaj).
Lub ntsiab
Electrostatic cov hmoov txau yuav tsum muaj cov txheej txheem tswj tas nrho los ntawm "pretrice - tsuag tsuag {1} Kho". Cov tub ntxhais yog kom ntseeg tau ruaj khov electrostatic, uniform hmoov nplaum, thiab caping txaus. Tib lub sijhawm, kev tiv thaiv kev nyab xeeb, kev tiv thaiv ib puag ncig thiab kev kuaj xyuas ib puag ncig yuav tsum tau ua tiav kom ua tiav kev ua tiav thiab siab {4 4 4}} kev tsim khoom zoo.
