Gudiga wareegga daabacan, gaar ahaan kuwa loo isticmaalo PDA -yada (kaaliyayaasha dhijitaalka ah ee shaqsiyeed) sida taleefannada gacanta, ayaa u nugul xadgudubka. In addition to collecting dust that can seep into the case of a phone, PCBS are also prone to soaking in or splashing out of liquids during daily use on e-book readers and similar handheld devices. Sidaas darteed, waxaa soo baxay warshado adeeg oo bixisa adeegyo nadiifin iyo dayactir PCBS wasakhaysan, laakiin aan lahayn waxyeello jireed PDA -yada iyo qalab weyn.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Haddii la isticmaalo hab nadiifin khaldan, waxay dhaawici kartaa isku -xirnaanta, dabcin kartaa qaybaha iyo alaabta waxyeellaysa. To avoid these defects, you need to take as much care in choosing the right cleaning method as you do in designing, specifying, and manufacturing boards.

Maxay yihiin dabinnadan? How can they be avoided?

Hoos, waxaan ku sahamin doonnaa ikhtiyaarrada nadiifinta PCB iyo qaar laga yaabo inaadan rabin inaad isticmaasho.

Noocyada kala duwan ee sunta

All kinds of pollutants can accumulate on PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Walxaha qallalan (boodh, wasakh)

Mid ka mid ah xaaladaha ugu badan ayaa ah in boodhku ku uruuro gudaha ama agagaarka PCB -ga. Si tartiib ah u isticmaal burush yar oo jilicsan (sida buraashka rinjiga rinjiga) si aad uga saarto boodhka adiga oo aan saamaynayn qaybaha. There is a limit to where even the smallest brush can reach, such as under the component.

Hawada cadaadisani waxay gaadhi kartaa aagag badan, laakiin waxay dhaawici kartaa isku -xidhka muhiimka ah, markaa waa in taxaddar la sameeyaa marka la isticmaalayo.

A specially designed vacuum cleaner for electronic components is also an option, but it is ubiquitous.

Wasaqda qoyan (wasakh, saliid dhuuban, dheecaan, soodh)

High-temperature operations can turn certain wax-coated components into magnets for dust and dirt, resulting in sticky grime that can’t be removed with a brush or vacuum cleaner. Haddii kale, badeecadu waxay heli doontaa soodhadh dheggan oo waxay isku qasaysaa looxyada. Either way, these substances should be addressed before they accumulate and affect performance.

Nadiifyada badankooda waxaa lagu nadiifin karaa nadiifiyeyaasha, sida khamriga isopropyl (IPA) iyo q-talooyin, burush yar ama maro suuf nadiif ah. Isticmaal dareerayaal sida IPA si aad ugu nadiifiso PCB-ga oo kaliya jawi wanaagsan, ha doorbidayso daboolka qiiqa.

You can use deionized water instead. Be sure to remove excess moisture and dry the plate properly (a few hours in a low oven will help remove any remaining moisture.)

In addition to IPA, there are many commercially available PCB cleaners, ranging from acetone to chemicals used to clean electronic equipment. Nadiifiyeyaasha kala duwan waxay la tacaali karaan noocyo gaar ah oo wasakhaysan, sida qulqulka ama wax. Keep in mind that harsh cleaners can remove marks from components or damage plastic or electrolytic capacitor jackets or other exotic components (such as humidity sensors), so make sure that the cleaner you use is not too strong. Haddii aad awooddo, uma baahnid inaad tijaabiso nadiifiyeyaasha qaybaha hore ama isku xirayaasha si aad u hubiso inaadan waxyeello badan geysan.

Ultrasonic PCB nadiifinta

The use of high frequency ultrasonic cleaning machine causes cavitation. Soo -jiidashada rabshadaha leh ee balaayiin goobooyin ah oo yar oo ku jira xalka nadiifinta ee ku jira taangiga nadiifiyaha ultrasonic. The bubbles are generated by a transducer attached to the bottom of the tank and are excited by the generator at an ultrasonic frequency. Dillaaca goobooyinkan waxaa afuufaya wasakh ka timid dusha nadiifta ah ee qaybaha.

Ultrasound waxaa lagu qeexi karaa hirarka dhawaaqa oo soo noqnoqoshadoodu ay ka sarreyso xadka sare ee heerka caadiga ah ee maqalka aadanaha, tusaale ahaan, qiyaastii 20 kHz (20 kHz ilbidhiqsi kasta ama 20,000 wareeg). Runtii, dhawaaqa nadiifiyaha ultrasonic ayaa la maqli karaa inta lagu jiro hawlgalka sababtuna tahay saamaynta waxa aan ugu yeerno cavitation ultrasonic.

Farsamadu waxay lumisaa qaar ka mid ah faa’iidooyinkeedii sida habka nadiifinta sababta oo ah waxay sababi kartaa waxyeello qayb ahaan ama xiriirro dabacsan iyo sidoo kale boodh iyo wasakh. Xaqiiqdii, NASA waxay soo saartay dardaaran ah inaan la isticmaalin nadiifinta ultrasonic sababta oo ah waxay si ulakac ah u sababi kartaa daboolka dhammaadka qaybaha inay kala tagaan oo runtii dhaawacaan fiilooyinka isku xidhka gudaha IC iyo socodsiinta ultrasonic ee tamarta suufka isku xidhka iyada oo loo marayo qaab -dhismeedka hogaanka IC.

Markaan sidaas idhi, weli waxaa jira meelo lagu isticmaali karo nadiifinta ultrasonic. Habka nadiifinta ultrasonic wuxuu gaari karaa meelaha ugu adag, oo ay adag tahay in la gaaro meelaha ka hooseeya shirka cufnaanta badan ee qaybaha badan ee guddiga wareegga. Tani ma aha kiiska qalabka SMD oo leh daldaloolo yar yar oo ka yar isku -dheelitirka xiisadda dusha ee dareeraha nadiifinta. Si kastaba ha ahaatee, howshu waa degdeg, waxaana jira mashiinno badan oo aad u sarreeya oo xamili kara nadaafad tiro badan.

Mashiinka nadiifinta ultrasonic PCB

Daloolintu ma aha hab fudud. Waxaa la xisaabiyey in heerkulka ka sarreeya 10,000 ° F iyo cadaadis ka badan 10,000 PSI laga soo saari doono goobta dillaacaysa ee goobooyin godan.

Nadiifiyeyaasha Ultrasonic waxay soo saari karaan jadwal u dhexeeya 25 kHz illaa 100+ kHz, oo lagu cabiro wareegyo ilbiriqsi kasta. Mowjadaha hoose waxay soo saaraan goobooyin cavitation oo waaweyn marka la barbar dhigo jadwalka sare. Xumbooyin waaweyn ayaa si xoog leh u qarxay, tusaale ahaan in laga saaro guud ahaan wasakhda ka samaysan qaybaha biraha la soo saaray. Mowjadaha sare waxay soo saaraan goobooyin yaryar, taasoo ka dhigaysa nadiifinta xumbada mid jilicsan laakiin awood u leh inay dhex gasho dildilaaca, dillaacyada iyo godadka indha la ‘. Mowjadaha sare ayaa loo isticmaalaa in lagu nadiifiyo meelaha aadka u dhaldhalaalan ama jilicsan.

gabagabeyn

Waxaa jira shirkado ku takhasusay nadiifinta PCB. Iyada oo ku xidhan baahiyahaaga (sida looxyo badan, waxa loo baahan yahay in la nadiifiyo, iyo sida looxyada ay u jilicsan yihiin), waxaa laga yaabaa inaad raadiso ilaha dibadda ee ku habboon si aad u daboosho baahiyahaaga nadiifinta.

Haddii aad marar badan dhibaato ku qabto guddiyada u baahan nadiifinta, waxaa laga yaabaa inay jiraan waxyaabo ka sii muhiimsan oo la hubiyo inta lagu guda jiro naqshadaynta ama habka wax -soo -saarka.

Nadiifinta PCBS ma aha inay noqoto hawl culus. Inaad maanka ku hayso talooyinka kor ku xusan iyo talooyinka waxay kaa caawinaysaa hubinta in nadaafadda si sax ah loo sameeyo.