kule minyaka imbalwa idlulileyo ibikukunciphisa ubungakanani bezinyibilikisi ezikhutshelwe emoyeni. Ezi zibizwa ngokuba yi-VOCs (i-volatile organic compounds) kwaye, ngokufanelekileyo, zibandakanya zonke i-solvents esizisebenzisayo ngaphandle kwe-acetone, ene-reactivity ye-photochemical ephantsi kakhulu kwaye ikhululwe njenge-solvent ye-VOC.
Kodwa kuthekani ukuba sinokuziphelisa ngokupheleleyo izinyibilikisi kwaye sifumane iziphumo ezilungileyo zokukhusela kunye nokuhombisa ngobuncinci bomzamo?
Oko kuya kuba kuhle - kwaye sinako. Itekhnoloji eyenza oku kwenzeke ibizwa ngokuba yi-UV curing. Sele isetyenziswa ukusukela ngeminyaka yoo-1970 kuzo zonke iintlobo zezinto ezibandakanya isinyithi, iplastiki, iglasi, iphepha kwaye, ngokwandayo, ngokhuni.
Iingubo ze-UV ezinyangayo zinyanga xa zibonakaliswe kukukhanya kwe-ultraviolet kuluhlu lwe-nanometer kwinqanaba eliphantsi okanye ngaphantsi kokukhanya okubonakalayo. Iinzuzo zabo ziquka ukunciphisa okuphawulekayo okanye ukupheliswa ngokupheleleyo kwee-VOC, inkunkuma encinci, indawo engaphantsi komhlaba efunekayo, ukuphathwa ngokukhawuleza kunye nokupakisha (ngoko akukho mfuneko yokomisa ii-racks), ukunciphisa iindleko zabasebenzi kunye namazinga okuvelisa ngokukhawuleza.
Izinto ezimbi ezimbi ezibalulekileyo zixabiso eliphezulu lokuqala kwisixhobo kunye nobunzima bokugqiba izinto eziyinkimbinkimbi ze-3-D. Ke ukungena kunyango lwe-UV kuhlala kunqunyelwe kwiivenkile ezinkulu ezenza izinto ezithe tyaba ezinje ngeengcango, iipaneli, umgangatho, ukusikwa kunye neendawo ezilungele ukuhlanganisana.
Eyona ndlela ilula yokuqonda ukugqitywa okunyangwa yi-UV kukuthelekisa kunye nokugqitywa okuqhelekileyo okwenziwe nge-catalyzed onokuthi uqhelene nazo. Njengokugqitywa kwe-catalyzed, ukugqitywa kwe-UV-okunyangwa kuqulethe i-resin yokuphumeza ukwakha, isinyibilikisi okanye indawo yokunciphisa, i-catalyst yokuqalisa ukudibanisa kunye nokuzisa unyango kunye nezinye izongezo ezifana ne-flatting agents ukubonelela ngeempawu ezizodwa.
Kusetyenziswa inani leereyini eziphambili, kubandakanywa izinto eziphuma kwi-epoxy, urethane, acrylic kunye nepolyester.
Kuzo zonke iimeko ezi resins zonyango zinzima kakhulu kwaye ziyakwazi ukunyibilika- kunye ne-scratch-resistant, ezifana ne-catalyzed (conversion) ivanishi. Oku kwenza ukulungisa okungabonakaliyo kube nzima ukuba ifilimu enyangisiweyo kufuneka yonakale.
Ukugqitywa kwe-UV-okunyangwa kunokuba yi-100 yepesenti yezinto eziqinileyo kwimo yolwelo. Oko kukuthi, ubukhulu bento efakwe kwiplanga bufana nobukhulu bengubo ephilileyo. Akukho nto inokujika ibe ngumphunga. Kodwa i-resin ephambili ityebile kakhulu ukuba ingasetyenziswa lula. Ke abavelisi bongeza iimolekyuli ezincinci ezisebenzayo ukunciphisa i-viscosity. Ngokungafaniyo nezinyibilikisi, ezijika zibe ngumphunga, ezi molekyuli zongeziweyo zidibanisa iimolekyuli ezinkulu zeresin ukwenza ifilimu.
I-solvents okanye amanzi anokongezwa njengama-thinners xa ukwakhiwa kwefilimu encinci ifunwa, umzekelo, isambatho se-sealer. Kodwa aziqhelekanga ukuba zenze ukugqiba ukutshiza. Xa izinyibilikisi okanye amanzi zongezwa, kufuneka zivunyelwe, okanye zenziwe (kwi-oveni), ukuba zibe ngumphunga ngaphambi kokuba kuqale ukunyanga kwe-UV.
I-catalyst
Ngokungafaniyo nevanishi eyenziwe nge-catalyzed, eqala ukunyanga xa i-catalyst yongezwa, i-catalyst kwi-UV-cured finish, ebizwa ngokuba yi-"photoinitiator," ayenzi nto ide ibe sesichengeni kumandla okukhanya kwe-UV. Emva koko iqala ukusabela ngokukhawuleza kwekhonkco elidibanisa zonke iimolekyuli ezikwi-coating kunye zokwenza ifilimu.
Le nkqubo yeyona nto yenza ukuba i-UV-enyangwayo igqibeke ibe yodwa. Akukho ngokusisiseko ishelufu- okanye imbiza ubomi ukugqiba. Ihlala ikwimo elulwelo de ibe sesichengeni sokukhanya kwe-UV. Emva koko iyaphilisa ngokupheleleyo kwimizuzwana embalwa. Gcina ukhumbula ukuba ukukhanya kwelanga kunokuphelisa ukunyanga, ngoko ke kubalulekile ukuluphepha olu hlobo lokuvezwa.
Kunokuba lula ukucinga nge-catalyst ye-UV yokwambathisa njengamacandelo amabini kunokuba ibe nye. Kukho i-photoinitiator esele igqityiwe - malunga neepesenti ezi-5 zolwelo-kwaye kukho amandla esibane se-UV esilumisayo. Ngaphandle kokubini, akukho nto yenzekayo.
Olu phawu lukhethekileyo lwenza ukuba kube lula ukuphinda ufune ukutshiza ngaphandle koluhlu lwesibane se-UV kwaye usebenzise ukugqiba kwakhona. Ngoko inkunkuma inokupheliswa ngokupheleleyo.
Isibane esiqhelekileyo se-UV yibhalbhu ye-mercury-vapor kunye ne-elliptical reflector ukuqokelela kunye nokwalathisa ukukhanya kwindawo. Ingcinga kukujolisa isibane sesona siphumo siphezulu ekumiseni i-photoinitiator.
Kule minyaka ilishumi idlulileyo ii-LED (light-emitting diode) sele ziqalisile ukutshintshela iibhalbhu zemveli kuba ii-LED zisebenzisa umbane omncinci, zihlala ixesha elide, akufuneki zifudumale kwaye zibenobude obumxinwa bobude ukuze zinganeli phantse njengoko zinjalo. ubushushu obuninzi obudala ingxaki. Obu bushushu bunokuzinyibilikisa iintlaka zomthi, njengakwipayina, kwaye ubushushu kufuneka buphele.
Inkqubo yokunyanga iyafana, nangona kunjalo. Yonke into "yindlela yokubona." Ukugqitywa kunyanga kuphela ukuba isibane se-UV sikubetha kumgama omiselweyo. Iindawo ezisethunzini okanye ezingaphandle kokukhanya azinyangi. Lo ngumda obalulekileyo wokunyangwa kwe-UV okwangoku.
Ukunyanga isigqubuthelo kuyo nayiphi na into entsonkothileyo, nokuba yinto ephantse yasicaba njengesibumba esineprofayili, izibane kufuneka zicwangciswe ukuze zibethe yonke indawo kumgama oqingqiweyo ofanayo ukuze zitshatise ukuqulunqwa kwengubo. Esi seso sizathu sokuba izinto ezisicaba zenza uninzi lweeprojekthi ezigqunywe ngokugqityezelwa kwe-UV.
Amalungiselelo amabini aqhelekileyo okusetyenziswa kwe-UV-coating kunye nokunyanga ngumgca osicaba kunye negumbi.
Ngomgca osicaba, izinto ezisicaba okanye eziphantse zisicaba zihamba ngezantsi kwesixhobo sokuhambisa phantsi kwesitshizi okanye ngerola okanye ngegumbi lokufunxa, emva koko nge-oveni ukuba kuyimfuneko ukususa izinyibilikisi okanye amanzi kwaye ekugqibeleni phantsi koluhlu lwezibane ze-UV ukuzisa unyango. Izinto ke ngoko zingapakishwa ngoko nangoko.
Emagumbini, izinto zivame ukuxhonywa kwaye zihanjiswe kunye ne-conveyor ngokusebenzisa amanyathelo afanayo. Igumbi lenza ukuba kwenzeke ukugqitywa kwawo onke macala kanye kunye nokugqitywa kwezinto ezingezizo eziyinkimbinkimbi, ezintathu-dimensional.
Enye into enokwenzeka kukusebenzisa irobhothi ukujikelezisa into phambi kwezibane ze-UV okanye ubambe isibane se-UV kwaye ujikeleze loo nto.
Ababoneleli badlala indima ephambili
Ngeengubo zokwaleka ezinyangwa yi-UV kunye nezixhobo, kubaluleke ngakumbi ukusebenza nababoneleli kunevanishi enecatalyzed. Esona sizathu siphambili linani leenguqu ekufuneka zilungelelaniswe. Ezi ziquka ubude be-bulb okanye ii-LED kunye nomgama wabo ukusuka kwizinto, ukuqulunqwa kwengubo kunye nesantya somgca ukuba usebenzisa umgca wokugqiba.
Ixesha lokuposa: Apr-23-2023
