Cov txheej txheem liab yog cov txheej txheem uas siv cov nplaum tshwj xeeb thermosetting nplaum (feem ntau liab) los kho cov hluav taws xob hauv hluav taws xob.
Cov kua nplaum liab muaj cov yam ntxwv ntawm viscosity zoo, cov kev ua kub kub, thiab kev ua tau zoo hluav taws xob, uas tuaj yeem ua kom cov ruaj khov kho ntawm cov hluav taws xob ntawm PCBs.
Cov kauj ruam tseem ceeb ntawm cov txheej nplaum liab muaj xws li:
Gluing: Thov cov kua nplaum liab dawb paug rau cov cam los ntawm pcb los ntawm lub tshuab xa tawm;
SMT: Chaw Hloov Hluav Taws Xob rau ntawm cov nplais hluav taws xob ntawm cov ntaub qhwv duav nrog kua nplaum liab raws li cov qauv yuav tsum tau ua;
Kev kho mob: ua kom sov cov khoom sib xyaw los ntawm cov cua sov kub kom txog thaum cov kua nplaum liab los ntawm cov kua nplaum liab thiab cov cam thiab cov khoom siv;
Vuam: Tom qab cov kua nplaum liab tau kho, yoj soldering, thiab lwm txoj kev xav tau soldering, thiab lwm txoj hauv kev siv rau weld cov khoom siv kom ua tiav cov kev sib txuas hluav taws xob.
Qhov sib txawv ntawm cov cam cov txheej txheem muab cov txheej txheem liab thiab cov kua nplaum liab
1. Los ntawm cov tsos, xim ntawm soldering muab tshuaj txhuam thiab SMT Raj kua nplaum yog txawv, thiab cov tshuaj txhuam paste ua ke; SMT Red Cov kua nplaum yog cov xim liab.
2. Nyob rau hauv cov nqe lus ntawm kev ua tau zoo, ib zaug SMT Patch Liab yog rhuab thiab tawv, nws yuav tsis yaj txawm tias thaum rhuab dua. Qhov no txhais tau hais tias cov txheej txheem thermal tawv ntawm SMT Patch Liab yog irreversible yog irreversible, uas yog qhov kho qhov tshwm sim hauv SMT Patch nplaum. Tom qab soldering lawm, tsis muaj surmenification tshwm sim hauv cov cam coore tuaj yeem tau qeeb qeeb rau hauv lub xeev molten ntawm qhov kub. Yog tias soldering tsis zoo, lub tin yuav tau muab tshem tawm siv ib lub cev siv hluav taws xob.
3. Los ntawm cov txheej txheem cov kua nplaum: Cov kua nplaum liab feem ntau tau txais kev tshaj tawm cov kev faib tawm, haum rau kev siv ntawm Circuit Court boards nrog tsawg dua dots; Cov ham muab tshuaj txhuam feem ntau txhawb kev xav ua soldering rauv luam ntawv luam ntawv, uas tuaj yeem luam ntau tus lej ntawm cov laug cam hluav taws xob ib zaug.
4. Los ntawm kev pom zoo, piv rau cov kua nplaum zoo, muaj ntau cov kua nplaum thiab ib puag ncig, muaj ntau dua kev cog qoob loo thiab ploj mus. Thiab ham muab tshuaj tsuag muaj zog weldability, thiab kev ruaj khov ntawm vuam yog tus muaj siab.
5. Nyob rau hauv cov nqe lus ntawm kev tsim khoom raug nqi, kev xaiv tau yog qhov txawv:
1) Thaum muaj ntau cov khoom siv smt thiab ob peb lub zug-intericents, ntau cov tuam txhab feem ntau siv cov txheej txheem muab tshuaj txhuam, thiab cov ntsaws cov khoom siv ua tiav thiab muab tso rau tom qab ua tiav.
2) Thaum muaj ntau qhov ntsaws cov hluav taws xob thiab cov ntse SMD, cov txheej txheem liab ntsuab feem ntau siv, thiab cov ntsaws rau hauv cov khoom siv tau ua tiav. Tsis hais tus txheej txheem siv, lub hom phiaj yog txhawm rau txhim kho cov txiaj ntsig thiab cov txiaj ntsig zoo.
6. Nyob rau hauv cov nqe lus ntawm cov kev siv, kua nplaum liab feem ntau ua lub luag haujlwm kho thiab pab pawg. SOLDER muab tshuaj txhuam yog qhov tseeb vuam ua haujlwm.
7. Hais txog cov kua nplaum, cov kua nplaum liab tsis yog-conductive, thaum ham muab tshuaj txhuam yog kev coj ua.
8. Nyob rau hauv cov lus cua sov: cov kua nplaum liab muaj qhov kub dua thaum dhau los ntawm kev cuam tshuam nrog soldering, nws tseem xav tau nthwv dej rau wurded. Qhov kub ntawm sold muab muab tshuaj txhuam nyob rau hauv lub reflow soldering tshuab yog ib qho siab dua.
