Kugadziriswa kwePowder Coating Application Equipment

Pane nzira dzakawanda dzekushandisa powder coating zvinhu; uye kune vanomweral poda coating application midziyo yesarudzo. Zvisinei, zvinhu zvinofanira kushandiswa zvinofanira kuva zvemhando inowirirana. Semuenzaniso, kana nzira yekushandisa iri fluidized bed. ipapo upfu unhani zvinhu zvinofanira fluidized mubhedha giredhi, Ukuwo, kana nzira kushandiswa ari electrostatic pfapfaidzo, ipapo upfu zvinhu zvinofanira electrostatic pfapfaidzo giredhi.

Kana izvo zvinyorwa zvanyatsosarudzwa, ipapo nzira yekushandisa inosarudzwa nechikamu dhizaini uye zvinangwa zvekugadzira. Pane nzira mbiri dzekushandisa. Izvi zvinosiyana zvakanyanya semashandisirwo azvinokodzera.

Aya mafomu ndeaya:

1. Fluidized bed application
2. Spray application.

FLUIDIZED BED

Iyi nzira yekushandiswa ndiyo yakatanga kushandiswa kuisa poda coating materil. Ichiri kushandiswa nhasi pane akawanda maapplication apo iyo mushure mekurapwa firimu ukobvu iri pamusoro pe5.0 mils. Zvinhu zvakajairika zvigadzirwa zvewaya, mabhawa emagetsi mabhazi, nezvimwe.

Iyo fluidized mubhedha nzira yekushandisa inogona kuitwa nenzira mbiri. Imwe nzira ndeye. Iyi ndiyo nzira inoda preheating chikamu kuitira kuti hupfu hunyunguduke uye hunamatira pairi. Chikamu chinopisa chinoiswa mumubhedha wakanyoroveswa wehupfu hwekuputira. Kuwanda kwehupfu hunoshandiswa kune chikamu ibasa rekuti chikamu chacho chinopisa sei uye yakareba sei mumubhedha. Zviripachena kuti kutonga kwekukora kwemafirimu hakusi kwekutanga kunetseka kana nzira iyi ikashandiswa.

Kuti uwane humwe hutongi hwehupamhi hwefirimu pane chikamu, neine fluidized bed system, nheyo dze electrostatics dzinounzwa. Sezvinoratidzwa mumufananidzo 1, chikamu chacho chinotakurwa pamusoro pemubhedha wemvura uye poda inokwezva kwairi. Iyo chikamu ikozvino haidi preheating isati yaiswa pamusoro pemubhedha. Hupfu hunokwezvwa kune chikamu nenzira ye electrostatic charge pahupfu. Iyi electrostatic charge inogadzirwa mumunda we electrostatic kungave pamusoro kana mumubhedha unoyerera.

Ukobvu hwefirimu pachikamu hwave kudzorwa kwete chete nguva iyo chikamu chiri mumubhedha wakanyungudika, asiwo kuti yakawanda sei electrostatic charge iri pahupfu. Kupisa kuchiri kushandiswa dzimwe nguva mukuita uku kukurira chikamu chigadziriso chinogona kukonzera Faraday cage matambudziko.

Iyi nzira yekushandisa inoshandiswa kupfekedza magetsi mota armatures. Izvi zvinoda high dielectric simba coating ine firimu ukobvu control kubvumira waya kukuvara zvakanaka.

Fluidized bed Kuvaka kunosiyana nemugadziri wega wega; zvisinei, zvikamu zvakafanana zvekutanga zvinoshandiswa mumagadzirirwo ese. Izvi zvikamu ihopper kana tangi, iyo plenum kana kamuri yemhepo, uye iyo fluidizing ndiro. Zvinhu zvakasiyana-siyana zvinoshandiswa kune chimwe nechimwe chezvikamu izvi zvinoenderana nekugadzira, mugadziri, uye kupera kushandiswa. Semuenzaniso, ndiro inoyerera inogona kugadzirwa ne porous polyethylene, inonzwika bhodhi, bepa rekugadzira, kana chero chinhu chine porous kana musanganiswa wezvinhu. Iyo tangi inogona kugadzirwa chero chinhu chinogona kutsigira huremu hwehupfu.

APPLICATION YEPRAY

Nzira yekushandisa poda coating ne electrostatic spray equipment yakaputswa kuita mhando mbiri. Muzviitiko zviviri izvi electrostatics inofanira kushandiswa kukwezva hupfu kune chikamu.Tere hapana mechanical kukwezva kana kunamatira kubata. Iyo hupfu kune chikamu sekuonekwa mune mvura yekupfapfaidza masisitimu. Nokudaro, poda inofanira kubhadharwa, kana kuti chikamu chinopisa (chinopisa chinokwezva), kuti chikwekwe kune substrate. Mufananidzo wakanakisa wekutsanangura izvi ndewekuti kana ukakwiza bharumu pabvudzi rako, inonamira kumadziro nekuda kweiyo electrostatic charge. Iro bharumu rimwechete harinamati kumadziro pasina chaji yemagetsi. Kuedza uku kunofanirwa kuitwa pazuva rakaoma (kwete rakanyorova). Iwo marudzi maviri e electrostatic spray powder coating application zvishandiso ndeaya:

1. corona charged spray guns.
2. Tribo akachaja pfuti dzespray

Amperage kudzikisira, kuchovha bhasikoro kana kupindirana kwazvino kushandiswa kunowedzera nguva inodiwa yekuputira, sezvo iri iyo inoshandiswa ampere-seconds (coulombs) inoburitsa electrodeposit.

Ikozvino Kushandiswa kunotangira kubva pa15 coulombs pagiramu rejasi rakapedzwa kusvika ku150 coul/g. Mushure mekutanga kuvhiyiwa, kukwirira kwemagetsi kweiyo firimu ichangobva kuiswa kunoderedza kuyerera kwazvino, zvichikonzera ovheni.rall chinodiwa maviri kusvika mana amp paskweya tsoka kweimwe kusvika kumaminetsi matatu, kana pakati peawa imwe nematatu kilowatt pa 100 square tsoka. Coating Nguva inosiyana kazhinji kubva kune imwe kusvika kumaminetsi matatu. Kune rimwe basa rinokosha, rakadai sewaya. mabhandi esimbi, nezvimwewo, nguva dzekuputira dzakaderera semasekonzi matanhatu dzinotaurwa.

Izvo zvinodikanwa zvemagetsi zvinonyanya kutaurwa nehunhu hweiyo yakaparadzirwa resin mubhavhu. Kuiswa kunowanzo shandiswa pakati pe200 ne400volts, asi mamwe anonzi anoshanda akadzika se50 volts uye mamwe akakwira se1000 volts.

Rinsing:

Zvimedu zvichangobva kuvharwa, kana zvasimudzwa kubva mubhavhu, takura madonhwe ekugezesa uye kunyange madhiri ependi. Kuwanda kwemafuta ependi kunowanikwa munharaunda yebasa riri kuputirwa. Inofungidzirwa kuti mutumbi wemotokari unogona kutakura (kudhonza kunze) inenge 1 galoni yekugeza. Pa 10wt% isina-volatiles iyi inenge 1 lb. Tichifunga nezve kutama kwezvakaoma kuenda kunzvimbo dziri kuvharwa, kuomarara kunosvika makumi matatu neshanu muzana kunotarisirwa munharaunda yavo. Saka, zviri pachena kuti kudzoreredzwa kwekugezeswa kwependi yakasimudzwa kwakakosha, uye nzira ine mari yakawanda yakawanikwa muchimiro che "ultrafiltrate rinse."

Ultrafiltration inoshandisa membranes inobvumira kupfuura kwemvura uye zvinhu zvakanyungudutswa zvechokwadi, zvakadai sezvinonyungudutsa, solubilizers, munyu (tsvina!), etc. Yakapararira pendi resins, pigments, nezvimwewo zvinochengetwa ne membrane. zana kana kupfuura magaroni ekugezera anopfuura kune rumwe rutivi rwemembrane pasi pekumanikidzwa, nepo galoni imwe yemvura yakajeka inoyerera inopfuura nepa membrane. Mvura, inonzi permeate kana ultrafiltrate, inounganidzwa uye inoshandiswa semvura inosuka (Fig. 7). Iyo yetatu-nhanho yekusuka sisitimu inodzoreredza ingangoita 85% yependi yakaoma iyo yakasimudzwa kubva mubhavhu.

Huwandu hweultrafiltrate dzimwe nguva hunoraswa, izvo zvingada kuti marori aende kunorasa nzvimbo. Huwandu hwemarara aya hunogona kudzikiswa nereverse osmosis.

Kubika kana Kurapa:

Iyo nguva / tembiricha zvinodiwa pakurapwa zvinorairwa neiyo resin system uye yakafanana neinodiwa kune yakajairwa dip kana kupfapfaidza pendi - kazhinji 5-25 maminetsi pa250'F kusvika 400 ° F tembiricha yemhepo. Air-drying electrocoats ari pamusika.

midziyo

Kupfekedza Matangi.

Mhando mbiri dzetangi dzinoshandiswa:

1. Iyo tangi madziro inoshandiswa se counter-electrode.
2. Rusvingo rwetangi rwakaiswa jasi remagetsi rekudzivirira, ukuwo ma-electrode anoiswa mutangi obva aiswa zvinoenderana nehukuru kana chimiro chechidimbu chebasa. Ma electrode ari mune mamwe magadzirirwo akakomberedzwa nemakamuri, rimwe divi iro rinoumbwa ne membrane. Iyo counter ions "X" kana "Y" ( Tafura 1) inoungana mumakamuri emagetsi nemaitiro anonzi electrodialysis, uye anoraswa kana kushandiswa zvakare.

Kushungurudzika:
Mapombi, machubhu ekudhirowa, mitsetse yemitsara uye ejector-nozzle masisitimu anokwanisa kufambisa kana kutenderedza vhoriyamu yese yekugezera mumaminetsi matanhatu kusvika makumi matatu anoshandiswa kudzivirira pendi kuti isagadzika mutangi.

Fltration:
Semutemo, 5 kusvika 75 micron pore saizi mafirita anoshandiswa kupfuudza iyo yese pendi vhoriyamu kuburikidza nesefa mumaminetsi makumi matatu kusvika zana nemakumi maviri. Iyo acidic yekudyisa zvinhu inogadzirwa uye inotumirwa kune pendi solids concentration kubva pa30% kusvika 120+%. Mune kumwe kuisirwa, chikafu chinomisikidzwa mutangi nenzira yezvikamu zviviri kana kupfuura, chimwe chikamu chiri resin, chimwe chikamu chiri pigment slurry, nezvimwe.

Solubilizer Removal Method:

Kuchengeta kugeza mukushanda, kubvisa yakasara solubilizer inoitwa kuburikidza ne electrodialysis, ion exchange, kana dialysis nzira.

Zvishandiso zvekutonhodza:

Anenge ese simba remagetsi rinoshandiswa rinoshandurwa kuita kupisa. Midziyo yekutonhodza inofanirwa kuve yakakwana kuchengetedza tembiricha yekugeza yaunoda, kazhinji iri pakati pe70°F ne90F, sekutsanangurwa kwevanopa pendi.

Kubika kana Kurapa:

Mhando yakajairika yevheni inoshandiswa. Kumhanya kwemhepo kuburikidza neovheni kwakadzikira zvishoma, nekuda kwehuwandu hudiki hwehunyungudika mubhachi repende.

Power source:

Rectifiers iyo inoburitsa yakananga ikozvino isingasviki 10% ripple factor inowanzotsanangurwa. Zvigadziriso zvakasiyana-siyana zvekunze-kuisa magetsi zviri kushandiswa, senge tap switch, induction regulators, saturable core reactors, nezvimwewo. Magetsi ari mu50 kusvika 500V renji anowanzo kupihwa. Chinodiwa chemazuva ano chinotarirwa kubva pahuremu hwekuputira huchashandiswa munguva iripo.