Izizathu ezininzi zokuhluza ipeyinti (一)

1.Iqamza: isenzeko esenza amaqamza kumphezulu weendawo ezine-sintered ngenxa yokukhutshwa ngobundlobongela kwerhasi.Ikwabizwa ngokuba yiblister, sisiphene sokugquma.Ngenxa yokungangeni kakuhle kunye nokumelana namanzi kwefilimu yokugquma yepeyinti esekwe kwi-solvent, ngexesha lenkqubo yokuguga yangaphandle, ngenxa yempembelelo yemvula okanye indalo emanzi, kukho ukuntywila kwamanzi phantsi kwefilimu yokwambathisa, kwaye emva kokufunxa, ukunyanzeliswa kunye nokungangeni. ifilimu yokwambathisa ethambileyo ngamanzi idumba, yenze amaqamza.Umongo wokufuma ongaphezulu uphezulu, ukufuma kwendawo kuphezulu, iqondo lobushushu liphezulu kakhulu, iputty ayivalwanga kakuhle, kwaye ikhefu phakathi kweeleya alanelanga.

I-2.I-Pinhole: Emva kokuba ifilimu yokugqoka isomile, umphezulu wepeyinti yepeyinti uya kwenza umngxuma, onjengeepores zesikhumba.Esi siphene sibizwa ngokuba yi-pinhole.Ngethuba lokwakhiwa kokutshiza, i-solvent kunye ne-air iya kunyuka ngokukhawuleza kwaye ibaleke kwifilimu yokugqoka emanzi, eya kwenza umngxuma omncinci.Ngeli xesha, ifilimu emanzi ayinayo i-fluidity eyaneleyo, engakwazi ukulinganisa umngxuma omncinci, eshiya umngxuma owenziwe ngenaliti.Xa kukho umkhondo wamanzi kwipeyinti okanye kwi-solvent, i-pinholes kungenzeka ukuba yenzeke.I-diluent iya kukhethwa ngokungqongqo ukukhusela amanzi kunye nezinye i-sundries ekuxubeni, kwaye i-viscosity yokwakha iya kulawulwa ngexesha elifanayo ukunciphisa okanye ukuphepha ukubonakala kweepinki.Kodwa ukuba yingxaki ye-pinhole yepeyinti esekwe emanzini, iya kuba yingxaki yefomula.
I-diluent yongezwa incinci kakhulu, i-viscosity yesihluzo sepeyinti inkulu kakhulu, i-coating ingqindilili kakhulu, ikhefu phakathi kweeleya akwanelanga, ixesha elimileyo emva kokuba ipeyinti ihlanjululwe alanele, kwaye i-diluent iyancipha ngokukhawuleza.

I-3.I-Pelleting: indawo yokwakha yokutshiza isikrini sokucoca ayihlambulukanga, i-workpiece iqulethe ioli, amanzi kunye nothuli, ukungcola okuxutywe kwi-coating akuhluzwanga, izixhobo zokudweba kunye nezikhongozeli azihlambulukanga, ipeyinti ayixutywanga ngokupheleleyo, kwaye ixesha lokucoca kunye nexesha lokuma alanelanga.

I-4.I-Shrinkage hole: isikrini sokucoca isitshizi sikwabizwa ngokuba ngumgodi.Ibhekisela kwisiphene semigodi emincinci ejikelezayo kwifilimu yokugqoka.Emva kokuba kufakwe isambatho, ifilimu emanzi iyancipha ngexesha lenkqubo yokulinganisa, ishiya inani lemingxuma yokunciphisa kunye nobukhulu obuhlukeneyo kunye nokusabalalisa emva kokumisa.Oku kungenxa yomahluko wokuxinana komphezulu phakathi kweendawo eziphezulu nezisezantsi zefilimu emanzi kunye nomgangatho ombi.Inokusombululwa ngokongeza izixhobo ezifanelekileyo zokulinganisa okanye izinyibilikisi ezisezantsi zoxinzelelo.
Uluhlu olusezantsi lungcolile, i-workpiece iqulethe ioli, amanzi kunye nothuli, njl.

I-5.I-Underbite: Xa utshiza isikrini sokucoca ngengubo yesibini yepeyinti, ipeyinti esanda kufakwa iluma ifilimu eyomisiwe ngaphambili kwi-substrate.Xa oku kusenzeka, i-coating iya kwanda, itshintshe, ishwabene, ishwabene, ishwabene, iqhume, okanye iphulukane nokuncamathela kwaye iwe.I-primer kunye nedyasi yokugqiba ayihambelani;Ukunyibilika kwe-solvent yepeyinti yokugqiba yomelele kakhulu;Ukuba i-primer ayimile ngokupheleleyo, iya kubangela "undercut".
I-primer kunye nepeyinti yokugqiba ayihambelani, ikhefu phakathi kweengqimba ayanelanga, umaleko ongezantsi awomile, i-diluent inamandla kakhulu, kwaye i-coating inzima kakhulu ngexesha elinye.