Amabhodi esekethe aphrintiwe (ama-PCB) amaqhawe angaqanjwanga obuchwepheshe besimanje, ahlinzeka ngokusebenza kumishini kagesi esiyisebenzisa nsuku zonke. Nakuba ukusebenza kwabo kwangaphakathi kuyisihloko esishisayo, isici esisodwa esiyingqayizivele ngokuvamile singanakwa - umbala wabo. Wake wazibuza ukuthi kungani ama-PCB aluhlaza kakhulu ngombala? Kule bhulogi, sizocubungula izici zomlando, ezobuchwepheshe, kanye nezisebenzayo eziholele ekudumeni kwama-PCB aluhlaza.
Umsuka womlando:
Ukuze siqonde ukuthi kungani okuluhlaza kube umbala okhethwayo wama-PCB, sidinga ukubuyela emuva maphakathi nekhulu lamashumi amabili. Ama-PCB akudala enziwa kusetshenziswa i-substrate ebizwa nge-Bakelite, into evalelayo enombala onsundu ohlukile. Kodwa-ke, njengoba ubuchwepheshe buthuthuka, imboni yaphendukela ezinketho ezisebenza kahle nezibukeka kahle.
Ukuba luhlaza:
Ngawo-1960, imboni ye-elekthronikhi yaqala ukusebenzisa i-epoxy resin njenge-substrate material ngenxa yokufakwa kahle kukagesi kanye nezakhiwo zemishini. Lawa ma-resin aphinde anikeze inzuzo eyengeziwe - ikhono lokuba nombala. Okuluhlaza umbala okhethwayo ngoba nje uyathengeka futhi utholakala kalula kubakhiqizi. Nikeza ukuthinta okukhangayo kokuqeda ku-PCB ngokumboza imikhondo yethusi ngoyinki wemaski we-solder oluhlaza.
Ukucatshangelwa okusebenzayo:
Ngaphezu kwezici zomlando, ukucatshangelwa okusebenzayo nakho kuye kwaba nomthelela ekudumeni kwama-PCB aluhlaza. Ake sihlole izizathu ezimbili ezibalulekile:
1. Ukugqama kanye nokucija:
Onjiniyela bezogesi nabaklami bakhetha okuluhlaza ngenxa yokuthi kuphambene nokubomvu, umbala wendabuko weziyinki zamaski ezidayiswayo. Inhlanganisela ehlukile yokubomvu nokuluhlaza yenza kube lula ukukhomba noma yimaphi amaphutha enqubweni yokukhiqiza nokuhlanganisa. Ukucaca okwandayo kunciphisa kakhulu amathuba okuba khona kwamaphutha futhi kuthuthukisa ikhwalithi iyonke yokukhiqizwa kwe-PCB.
2. Ukukhathala kwamehlo:
Esinye isizathu sokukhethwa kokuluhlaza sihlobene nobunjiniyela bomuntu. Ukusebenza ngemishini kagesi kanye nama-PCB kudinga amahora wokugqolozela kumasekhethi ayinkimbinkimbi nezingxenye ezincane. Okuluhlaza kuyakhethwa ngoba kungumbala onciphisa ukucindezelwa kwamehlo nokucindezeleka, okuvumela ochwepheshe ukuthi basebenze isikhathi eside ngaphandle kokuphatheka kabi noma ukulahlekelwa ukunemba. Umthelela opholile wokuluhlaza emehlweni uwenza alungele ukusetshenziswa isikhathi eside.
Ezinye izindlela zesimanje:
Ngenkathi ama-PCB aluhlaza ebusa imboni amashumi eminyaka, izinto ezintsha zesimanje ziye zandisa iphalethi yama-PCB. Namuhla, ungathola ama-PCB ngemibala ehlukahlukene, kusukela kokuluhlaza okwesibhakabhaka nokubomvu ukuya kokumnyama futhi nokushintshashintshayo. Lezi zinketho zibhekana nezinhlelo zokusebenza ezithile, izintandokazi zobuhle, noma izidingo ezihlukile zokubeka uphawu. Kodwa-ke, naphezu kohlu olubanzi lwezinketho ezitholakalayo, okuluhlaza kuhlala kungumbala osetshenziswa kakhulu ngenxa yezindleko zayo, ukujwayela nokuthembeka.
Ukuduma kwama-PCB aluhlaza kungabangelwa yinhlanganisela yezici zomlando, ezobuchwepheshe kanye nezisebenzayo. Kusukela ezimpandeni zayo zakuqala ekuthengeni nasekuchichimeni kwe-epoxy eluhlaza, kuya ekucaceni kwayo okukhulayo kanye nokuncipha kwamehlo, umbala usufana nemboni yezogesi. Ngenkathi imakethe manje inikezela ngohlu olubanzi lwezinketho zemibala, kuphephile ukusho ukuthi ama-PCB aluhlaza azoqhubeka nokubusa ngekusasa elibonakalayo.
Isikhathi sokuthumela: Aug-23-2023