Abadlali abaningi be-DIY bazothola ukuthi imibala ye-PCB esetshenziswa imikhiqizo ehlukahlukene yebhodi emakethe iyakhazimula.Imibala evame kakhulu ye-PCB emnyama, eluhlaza, eluhlaza okwesibhakabhaka, ephuzi, ensomi, ebomvu nensundu.Abanye abakhiqizi bathuthukise ngobuhlakani ama-PCB emibala ehlukene njengomhlophe nopinki.
Ngombono wendabuko, i-PCB emnyama ibonakala ibekwe endaweni ephezulu, kuyilapho okubomvu nokuphuzi kunikezelwe ekugcineni okuphansi.Akulona iqiniso lelo?
Isendlalelo sethusi se-PCB esingagcotshwanga ngemaski ye-solder sifakwa i-oxidized kalula lapho sivezwa emoyeni
Siyazi ukuthi zombili izinhlangothi ze-PCB ziyizingqimba zethusi.Ekukhiqizweni kwe-PCB, ungqimba lwethusi luzothola indawo ebushelelezi futhi engavikelekile kungakhathaliseki ukuthi lwenziwa ngezindlela ezingeziwe noma ezikhiphayo.
Nakuba izakhiwo zamakhemikhali zethusi zingasebenzi njenge-aluminium, insimbi, i-magnesium, njll., lapho kukhona amanzi, ithusi elihlanzekile lifakwa kalula nge-oxidized lapho lithintana nomoya-mpilo;ngenxa yokuthi umoya-mpilo nomhwamuko wamanzi ukhona emoyeni, ingaphezulu lethusi elimsulwa lichayeka emoyeni Ukusabela kwe-oxidation kuzokwenzeka maduze.
Ngenxa yokuthi ukushuba kongqimba lwethusi ku-PCB mncane kakhulu, ithusi eline-oxidized lizoba umqhubi ompofu kagesi, okuzolimaza kakhulu ukusebenza kukagesi kwayo yonke i-PCB.
Ukuze kuvinjwe i-copper oxidation, ukuhlukanisa izingxenye ezidayisiwe nezingathengiswanga ze-PCB ngesikhathi sokudayiswa, nokuvikela ingaphezulu le-PCB, onjiniyela basungula i-coating ekhethekile.Lolu hlobo lukapende lungasetshenziswa kalula ebusweni be-PCB ukwenza ungqimba oluvikelayo olunogqinsi oluthile futhi luvimbele ukuthintana phakathi kwethusi nomoya.Lolu ngqimba lwe-coating lubizwa nge-solder mask, futhi impahla esetshenzisiwe i-solder mask.
Njengoba ibizwa ngokuthi i-lacquer, kufanele ibe nemibala ehlukene.Yebo, imaski yokuqala ye-solder ingenziwa ingabi nambala futhi ibonakale, kodwa ukuze kube lula ukugcinwa nokukhiqiza, ama-PCB ngokuvamile adinga ukuphrinta ngombhalo omncane ebhodini.
Imaski ye-solder ekhanyelayo ingadalula kuphela umbala wangemuva we-PCB, ngakho ukubukeka akukuhle ngokwanele noma ngabe kuyakhiqiza, ukulungisa noma ukudayisa.Ngakho-ke, onjiniyela bengeze imibala ehlukahlukene kumaski e-solder ukuze bakhe i-PCB emnyama noma ebomvu, eluhlaza okwesibhakabhaka.
I-PCB emnyama kunzima ukubona umkhondo, okuletha ubunzima ekunakekeleni
Ngokwaleli phuzu lokubuka, umbala we-PCB awuhlangene nekhwalithi ye-PCB.Umehluko phakathi kwe-PCB emnyama namanye ama-PCB anombala afana ne-PCB eluhlaza okwesibhakabhaka kanye ne-PCB ephuzi usembala we-solder mask.
Uma idizayini ye-PCB nenqubo yokukhiqiza ifana ncamashi, umbala ngeke ube nomthelela ekusebenzeni, futhi ngeke ube nomthelela ekulahlekeni kokushisa.
Ngokuphathelene ne-PCB emnyama, imikhondo yongqimba lwawo ongaphezulu icishe imbozwe ngokuphelele, okubangela ubunzima obukhulu ekuyilungiseni kamuva, ngakho ingumbala ongafanele ukwenziwa nokusetshenziswa.
Ngakho-ke, eminyakeni yamuva nje, abantu baye bashintsha kancane kancane, beyeka ukusetshenziswa kwe-black solder mask, futhi esikhundleni salokho basebenzise imaski eluhlaza okwesibhakabhaka, emnyama, eluhlaza okwesibhakabhaka kanye namanye ama-solder, inhloso ukwenza lula ukukhiqizwa nokugcinwa.
Sengikushilo lokho, wonke umuntu useyiqondile inkinga yombala we-PCB.Mayelana nesitatimende "sokumelwa kombala noma isiphetho esiphansi", kungenxa yokuthi abakhiqizi bakhetha ukusebenzisa ama-PCB amnyama ukuze benze imikhiqizo ephezulu, nokubomvu, okuluhlaza okwesibhakabhaka, okuluhlaza okotshani, nokuphuzi ukwenza imikhiqizo esezingeni eliphansi.
Isifinyezo sithi: umkhiqizo unikeza incazelo yombala, hhayi umbala onikeza incazelo yomkhiqizo.
3.Iziphi izinzuzo zokusebenzisa izinsimbi eziyigugu njengegolide nesiliva ku-PCB?
Umbala ucacile, ake sikhulume ngezinsimbi eziyigugu ku-PCB!Lapho abanye abakhiqizi bekhangisa imikhiqizo yabo, bazosho ngokuqondile ukuthi imikhiqizo yabo isebenzisa izinqubo ezikhethekile ezifana nokufakwa kwegolide nokucwenga kwesiliva.Ngakho yini ukusetshenziswa kwale nqubo?
Indawo ye-PCB idinga izingxenye zokunamathisela, ngakho-ke ingxenye yongqimba lwethusi iyadingeka ukuze ivezwe ukuze ihlanganiswe.Lezi zingqimba zethusi eziveziwe zibizwa ngokuthi ama-pads.Amaphedi ngokuvamile anonxande noma ayindilinga anendawo encane.
Okungenhla, siyazi ukuthi ithusi elisetshenziswe ku-PCB likhishwa kalula nge-oxidized, ngakho-ke ngemva kokusetshenziswa kwe-mask ye-solder, ithusi ku-pad livezwa emoyeni.
Uma ithusi ku-pad i-oxidized, akunzima nje ukudayiswa, kodwa futhi ukumelana nokumelana kukhula kakhulu, okuthinta kakhulu ukusebenza komkhiqizo wokugcina.Ngakho-ke, onjiniyela baqhamuke nezindlela ezahlukahlukene zokuvikela ama-pads.Isibonelo, ifakwe ngegolide lensimbi ye-inert, noma ingaphezulu limbozwe ungqimba lwesiliva ngenqubo yamakhemikhali, noma ifilimu ekhethekile yamakhemikhali isetshenziselwa ukumboza ungqimba lwethusi ukuvimbela ukuthintana phakathi kwephedi nomoya.
Kumaphedi adaluliwe ku-PCB, isendlalelo sethusi sivezwa ngqo.Le ngxenye idinga ukuvikelwa ukuze ivinjwe ukuthi ifakwe i-oxidized.
Kusukela kulo mbono, kungakhathaliseki ukuthi igolide noma isiliva, inhloso yenqubo ngokwayo ukuvimbela i-oxidation, ukuvikela i-pad, nokuqinisekisa isivuno enqubweni ye-solder elandelayo.
Kodwa-ke, ukusetshenziswa kwezinsimbi ezahlukene kuzobeka izidingo ngesikhathi sokugcina kanye nezimo zokugcina ze-PCB ezisetshenziswa endaweni yokukhiqiza.Ngakho-ke, amafekthri e-PCB ngokuvamile asebenzisa imishini yokupakisha ye-vacuum plastic ukupakisha ama-PCB ngemva kokuqedwa kokukhiqizwa kwe-PCB nangaphambi kokulethwa kumakhasimende ukuze kuqinisekiswe ukuthi ama-PCB awafakwa i-oxidized kuze kube umkhawulo.
Ngaphambi kokuba izingxenye zishiselwe emshinini, umenzi wekhadi lebhodi kufanele futhi ahlole i-oxidation degree ye-PCB, asuse i-PCB ye-oxidation, futhi aqinisekise isivuno.Ibhodi elitholwa umthengi wokugcina liphumelele ukuhlolwa okuhlukahlukene.Ngisho nangemva kokusetshenziswa isikhathi eside, i-oxidation cishe izokwenzeka kuphela engxenyeni yokuxhuma i-plug-in, futhi ngeke ibe nomthelela ku-pad kanye nezingxenye ezivele zidayisiwe.
Njengoba ukumelana kwesiliva negolide kuphansi, ngemva kokusebenzisa izinsimbi ezikhethekile njengesiliva negolide, ingabe ukukhiqizwa kokushisa kwe-PCB kuzoncishiswa?
Siyazi ukuthi isici esithinta inani lokushisa ukumelana.Ukumelana kuhlobene nempahla ye-conductor ngokwayo, indawo ye-cross-sectional kanye nobude bomqhubi.Ubukhulu bezinto zensimbi ebusweni bephedi bungaphansi kakhulu kuka-0.01 mm.Uma iphedi icutshungulwa indlela ye-OST (organic protective film), ngeke kube khona ukujiya okweqile nhlobo.Ukumelana okuboniswa ukushuba okuncane okunjalo kucishe kulingane no-0, ngisho akunakwenzeka ukubala, futhi-ke ngeke kuthinte isizukulwane sokushisa.