Comprehensive Guide For Cleaning Printed Circuit Board

Printed Circuit Boards (PCBs) ke mokokotlo oa lisebelisoa tsa elektroniki tsa sejoale-joale, tse sebetsang e le motheo oa lisebelisoa tse fapaneng, ho kenyeletsoa li-smartphone, likhomphutha le lisebelisoa tsa indasteri. Ho boloka liboto tsena li hloekile ho bohlokoa bakeng sa ho boloka ts'ebetso le nako e telele ea lisebelisoa tsa hau tsa elektroniki. Leha ho le joalo, ho hloekisa PCBs hase mosebetsi o tobileng; e akarelletsa ho sebetsana le likarolo tse pshatlehang le lintho tse silafatsang tse sa tšoaneng. Tataiso ena e felletseng e fana ka lintlha tse qaqileng mabapi le mekhoa e metle, mekhoa le litemoso tsa ho hloekisa li-PCB ka nepo, ho netefatsa hore li lula li le maemong a nepahetseng.

Ho Utloisisa Mathata a ho Hloekisa PCB

Ho hloekisa li-PCB ho thata ka lebaka la moralo o rarahaneng le sebopeho se hlokolosi sa likarolo tsa tsona. Mehato e fosahetseng ts'ebetsong ea ho hloekisa e ka lebisa tšenyo e ke keng ea etsolloa, ke ka lebaka leo ho leng bohlokoa ho ela hloko mathata a tloaelehileng a amehang:

1. Boikutlo ba Karolo: Li-PCB li na le likarolo tse fapaneng tse hlokolosi, ho kenyelletsa le li-microchips, capacitors, 'me lihanyetsi. Likarolo tsena li kotsing ea ho senyeha ha 'mele le ho pepesehela lik'hemik'hale nakong ea ho hloekisa.
2. Mefuta e sa tšoaneng ea Tšilafalo: Li-PCB li ka bokella mefuta e fapaneng ea litšila, joalo ka lerole, oli, masalla a flux, le oxidation. Tšilafalo e 'ngoe le e 'ngoe e hloka mokhoa o itseng oa ho hloekisa, e leng se etsang hore ho be bohlokoa ho tseba mofuta oa tšilafalo pele o tsoela pele.
3. Kotsi ea Tšenyo: Mekhoa e sa nepahalang ea ho hloekisa e ka senya likhokahano tsa PCB, ea theola likarolo, kapa ea hlobolisa litlolo tse sireletsang, e leng se lebisang ho hloleheng ho sebetsa. Kotsi ena e totobatsa bohlokoa ba ho khetha mokhoa o nepahetseng oa ho hloekisa bakeng sa mofuta o mong le o mong oa litšila.

Mefuta ea Litšila tse Fumantsoeng ho PCBs

Ho hloekisa PCB ka nepo, ho bohlokoa ho utloisisa mefuta ea litšila tse ka bang teng:

• Lerōle le Litšila : Litšila tsena tse omileng li tloaelehile hoo e ka bang libakeng tsohle 'me li ka senya ts'ebetso ea motlakase ea PCB ka ho theha ho thibela ho kenella ha motlakase ho sa batleheng kapa litsela tse tsamaisang motlakase.

• Litšila tse Metsi : Metsi a tšolohileng a kang soda, oli, kapa litšila a ka etsa masala a khomarelang holim'a PCB, a hohela lerōle le lengata le ho etsa likarolo tse rarahaneng tsa tšilafalo.

• Ho ntsha oksideishene : Dikarolo tsa tshepe ho PCB, haholo-holo mesaletsa ya koporo e pepeneneng le manonyeletso a solder, di ka ntsha oksideishene ha nako e ntse e ya, e leng se lebisang ho tsamaiso e mpe ya motlakase le ho hloleha ha potoloho.

• Masalla a Tlhahiso : Nakong ea tlhahiso, li-PCB li ka bokella masalla a kang flux, libolo tsa solder, kapa li-solvent tse hloekisang tse ka amang ts'ebetso ea boto haeba li sa tlosoe hantle.

Mekhoa e Sebetsang ea ho Hloekisa ea PCB

Ho ipapisitse le mofuta oa litšila, mekhoa e fapaneng ea ho hloekisa e lokela ho sebelisoa ho netefatsa hore e tlositsoe ka mokhoa o bolokehileng:

1. Litšilafatso tse omileng (Lerōle, Litšila)

• • Borashe: Sebelisa borashe bo bonyenyane, bo bonolo (joalo ka borashe ba moriri oa pere) ho fiela lerōle le litšila. E-ba hlokolosi ha u le haufi le lisebelisoa tse hlokolosi ho qoba tšenyo.
  • Moea o petelitsoeng: Lekotikoti la moea o hatelitsoeng le ka phethola likaroloana tse hlephileng, empa le lokela ho sebelisoa ka mokhoa o fokolang ho thibela ho ntša likaroloana tse nyenyane.
  • Vacuum Cleaners bakeng sa Electronics: Li-vacuum tse khethehileng tse etselitsoeng lisebelisoa tsa elektronike li ka ba molemo, empa etsa bonnete ba hore ho hula ho bonolo hoo ho ke keng ha senya boto.

2. Litšilafalo tse Metsi (Grime, Oils, Flux)

• • Joala ba Isopropyl (IPA): Mokelikeli o sebelisoang hangata bakeng sa ho hloekisa PCB, IPA ka katleho e qhaqha oli le masala a phallo. E sebelise u sebelisa lesela le se nang lint kapa Q-tip 'me u netefatse hore sebaka seo se na le moea o motle nakong ea ho hloekisa.
  • Metsi a Demineralized: Mokhoa o mong ho fapana le IPA, metsi a nang le demineralized a ka sebelisoa ho hloekisa, empa ho bohlokoa ho omisa PCB ka botlalo ho thibela kutu.
  • Li-agent tse Khethehileng tsa ho Hloekisa: Tsena li etselitsoe litšila tse itseng, joalo ka li-flux removers kapa li-degreaser. Sebelisa ka hloko, kaha lik'hemik'hale tse ling li ka senya likarolo tsa polasetiki kapa tsa hlakola matšoao ho PCB.

3. Ultrasonic Cleaning

• • Method: Bahloekisi ba Ultrasonic ba sebelisa maqhubu a molumo a phahameng-frequency ho etsa li-bubble tsa cavitation tse tlosang litšila ho PCB. Le hoja mokhoa ona o sebetsa, ho molemo hore o boloketsoe likaroloana tse sa utloeleng bohloko, kaha ho thothomela ho ka senya likarolo tse pshatlehang.
  • dikopo: E loketse ho hloekisa libaka tseo ho leng thata ho fihla ho tsona le bakeng sa lihlopha tse kholo tsa li-PCB. Leha ho le joalo, ha e khothalletsoe bakeng sa lisebelisoa tse holimo-limo (Li-SMD) ka lebaka la monyetla oa ho falla ha karolo.

Litlhokomeliso le Mekhoa e Metle ea ho Hloekisa PCB

Ha u hloekisa li-PCB, mehato e mengata ea ho itšireletsa e lokela ho nkoa ho qoba ho senya boto le likarolo tsa eona:

• Tšoara Librashe le Masela ka Tlhokomelo: Sebelisa khatello e bonolo ha u hloekisa ho qoba ho senya likarolo tse senyehang joalo ka lipina tsa terata le manonyeletso a solder.
• Sebaka se Sireletsehileng ho Lisebelisoa tsa Ultrasonic: Netefatsa hore PCB e behiloe ka mokhoa o sireletsehileng ka har'a ultrasonic cleaner ho thibela ho sisinyeha ho feteletseng ho ka lebisang ho senyeha ha karolo.
• Sheba ho Component Datasheets: Pele o sebelisa lik'hemik'hale leha e le life tsa ho hloekisa, sheba lipampiri tsa likarolo ho netefatsa hore lia lumellana le ho qoba ho sebelisa lihlapolli tse ka senyang thepa.
• Hloekisa Hang Ka mor'a Soldering: Masala a Flux a ba thata ho a tlosa ha nako e ntse e ea 'me a ka baka kutu. Hloekisa PCB hang ka mor'a ho soasoa ho thibela sena.
• Emahanyang Melao ea ho Hloekisa: Kenya ts'ebetsong mekhoa e tloaelehileng ea ho hloekisa, ho kenyeletsa le tšebeliso ea lisebelisoa tsa ts'ireletso tse kang li-wristbands tsa electrostatic le limaske ho sireletsa PCB le setsebi.
• Lekola Bohloeki ka Mor'a ho Hloekisa: Ka mor'a ho hloekisa, hlahloba PCB bakeng sa mesaletsa leha e le efe e setseng, joalo ka libolo tsa flux kapa solder, tse ka bakang lipotoloho tse khutšoanyane.
• Laola Ho Omisa Mocheso: Ha o omisa PCB, qoba mocheso o phahameng o ka senyang boto kapa oa senya likarolo.
• Qoba ho Kopana ka ho Otloloha le li-PCB tse hloekisitsoeng: Ho thibela ho tšoaetsoa hape, tšoara li-PCB tse hloekisitsoeng u sebelisa liatlana kapa li-tweezers, ho qoba ho kopana le letlalo ka ho toba.

fihlela qeto e

Ho hlwekisa di-PCB ke mosebetsi wa bohlokwa wa tlhokomelo oo, ha o etswa ka nepo, o ka eketsang nako ya bophelo ba disebediswa tsa hao tsa elektroniki haholo. Ka ho utlwisisa mefuta e fapaneng ya ditshila le ho sebedisa mekgwa e loketseng ya ho hlwekisa, o ka netefatsa hore di-PCB tsa hao di dula di le boemong bo botle. Hopola, ho nepahala le tlhokomelo e tshwanang e sebediswang moralong le kopanong ya di-PCB ho lokela ho sebediswa nakong ya ho hlwekisa ha tsona ho qoba tshenyo le ho boloka tshebetso ya tsona. Ho hlwekisa di-PCB ka nepo ha ho thibele feela ho hloleha empa hape ho ntlafatsa tshebetso ya disebediswa tsa hao tsa elektroniki , ho netefatsa hore di phela nako e telele ebile di a tshepahala.