Ishicilelwe ibhodi yesekethe. 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. Ngenxa yoko, kuye kwavela ishishini lenkonzo elibonelela ngeenkonzo zokucoca nokulungisa ii-PCBS ezingcolileyo, kodwa ngaphandle kokonakala emzimbeni kwii-PDAs nakwizixhobo ezikhulu.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Ukuba kusetyenziswa indlela engeyiyo yokucoca, inokonakalisa unxibelelwano, ikhulule izinto kunye nezinto zokonakalisa. 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.

Yeyiphi le migibe? Zinokuphetshwa njani?

Apha ngezantsi, siza kuvavanya iindlela zokucoca i-PCB kunye nezinye onokungazifuni.

Iindidi ezahlukeneyo zezingcolisi

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

Izinto ezingcolisayo ezomileyo (uthuli, ubumdaka)

Enye yezona meko zixhaphakileyo kukuba uthuli luqokelelana ngaphakathi okanye ngeenxa zonke kwi-PCB. Ngenyameko sebenzisa ibrashi encinci, ethambileyo (enje ngebrashi yepeyinti yehasheha) ukususa uthuli ngaphandle kokuchaphazela izinto. Kukho umda apho ibhrashi encinci inokufikelela khona, njengaphantsi kwecandelo.

Umoya oxineneyo unokufikelela kwiindawo ezininzi, kodwa ungonakalisa unxibelelwano olubalulekileyo, ke kufuneka unonophelo xa ulisebenzisa.

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

Ukungcola okumanzi (ukungcola, ioyile yeoyile, ukuhamba, isoda)

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. Ngaphandle koko, imveliso iya kufumana isoda encangathi kwaye iphazamise iibhodi. Either way, these substances should be addressed before they accumulate and affect performance.

Uninzi lwamabala lungasuswa kunye nezicoci, ezinje nge-isopropyl alcohol (IPA) kunye ne-q-tips, iibrashi ezincinci okanye ilaphu elicocekileyo lomqhaphu. Sebenzisa izinyibilikisi ezinje nge-IPA ukucoca i-PCB kuphela kwindawo enomoya ongcolileyo, ngokukhethekileyo kwindawo evutha umlilo.

Unokusebenzisa amanzi akhethiweyo endaweni yoko. 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. Izicoci ezahlukeneyo zinokujongana neentlobo ezithile zongcoliseko, ezinje ngokuhamba okanye i-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. Ukuba unako, awudingi kuvavanya ukucoca izinto ezindala okanye izihlanganisi ukuze uqiniseke ukuba awenzi monakalo omninzi.

Ukucoca i-Ultrasonic PCB

Ukusetyenziswa komatshini wokucoca ohamba ngesantya esiphezulu kubangela i-cavitation. Ukunyanzelwa kobundlobongela beebhiliyoni zamabhamu amancinci kwisisombululo sokucoca esikwitanki lokucoca i-ultrasonic. Amaqamza aveliswa yitransducer eqhotyoshelwe emazantsi etanki kwaye bonwabile ngumvelisi kumaza e-ultrasonic. Ukuqhuma kwala maqamza kuya kubethwa ngumoya wokungcola komhlaba ococekileyo wamalungu.

I-Ultrasound inokuchazwa njengamaza esandi lawo amaza ombane angaphezulu komda ophezulu kuluhlu oluqhelekileyo lokuva kwabantu, okt malunga ne-20 kHz (20 kHz ngomzuzwana okanye ngama-20,000 imijikelezo). Ewe isandi se-ultrasonic cleaner sinokuviwa ngexesha lokusebenza ngenxa yempembelelo yento esiyibiza ngokuba yi-ultrasonic cavitation.

Obu buchule bulahlekelwa lolunye lweendlela zalo zokucoca kuba kunokubangela ukonakala kwecandelo okanye unxibelelwano olukhululekileyo nothuli nothuli. Ngapha koko, i-NASA ikhuphe umyalelo wokuba ungasebenzisi ukucoca i-ultrasonic kuba inokuthi ngokungacwangciswanga ibangele ukuba ii-caps zokugqibela zihlukane kwaye zonakalise iingcingo zokubopha ngaphakathi kwe-IC kunye nokuqhutywa kwe-ultrasonic yentsimbi ye-bonding yamandla ngokusebenzisa i-IC lead frame.

Xa sele nditshilo, kusekho iindawo apho kusetyenziswa khona ukucoca i-ultrasonic. Inkqubo yokucoca i-ultrasonic inokufikelela kwezona ndawo zinzima, ekunzima ukufikelela kuzo ezantsi kwendibano yoxinaniso oluphezulu kwiindawo ezininzi zebhodi yesekethe. Le ayisiyiyo imeko yezixhobo zeSMD ezinezikhewu ezincinci ezincinane kunomlinganiso wengxwabangxwaba yomphezulu wolwelo lokucoca. Nangona kunjalo, le nkqubo iyakhawuleza, kwaye baninzi oomatshini abaphezulu abanokukwazi ukucoca izixa ezikhulu.

Umatshini wokucoca we-PCB we-ultrasonic

I-Cavitation ayisiyinkqubo ethobekileyo. Kubaliwe ukuba amaqondo obushushu angaphezu kwe-10,000 ° F kunye noxinzelelo olungaphezulu kwe-10,000 PSI ziya kwenziwa kwindawo egqabhukileyo yamaqamza e-cavitation.

Izicoci ze-Ultrasonic zinokuvelisa ii-frequency ezivela kwi-25 kHz ukuya kwi-100 + kHz, ezilinganiswe kwimijikelezo ngomzuzwana. Amaza asezantsi avelisa amaqamza amakhulu e-cavitation xa kuthelekiswa neziqwengana eziphezulu. Amaqamza amakhulu aphuphuma ngogonyamelo ngakumbi, umzekelo ukususa ukungcola okupheleleyo kwiindawo zentsimbi ezenziwe. Amaza aphakamileyo avelisa amaqamza amancinci, enza ukuba kucocwe i-bubble buthozame kodwa kube nakho ukungena ekuqhekekeni, kwimingxunya nakwimingxunya engaboniyo. Amaza aphakamileyo asetyenziselwa ukucoca iindawo ezipholileyo okanye ezibuthathaka.

siphelo

Kukho iinkampani ezijolise ekucoceni i-PCB. Kuxhomekeka kwiimfuno zakho (ezinje ngenani elikhulu lamaplanga, yintoni ekufuneka icociwe, kwaye nokuba zibuthathaka kangakanani iiplanga), unokujonga umthombo olungileyo wangaphandle ukuhlangabezana neemfuno zakho zokucoca.

Ukuba uhlala uneengxaki kwiibhodi ezifuna ukucocwa, kusenokwenzeka ukuba kukho izinto ezibaluleke ngakumbi zokujonga ngexesha loyilo okanye inkqubo yokuvelisa.

Ukucoca iPCBS akufuneki kube ngumsebenzi onzima. Ukugcina ezi ngcebiso kunye neengcebiso ezingasentla engqondweni kuya kunceda ekuqinisekiseni ukuba ukucoca kwenziwa ngokuchanekileyo.