Raws li cov khoom tseem ceeb hauv cov txheej txheem SMT, kev tswj qhov kub thiab txias ntawm solder paste thaum lub sij hawm cia thiab siv ncaj qha txiav txim siab qhov txiaj ntsig ntawm PCBA soldering. Kev lag luam cov ntaub ntawv qhia tau hais tias solder paste tsis muab cia rau hauv txias cia nyob rau hauv ib tug standardized yam yog nquag oxidation thiab txawv txav viscosity, ua rau ntau tshaj 40% nce nyob rau hauv cov nqi xws li virtual soldering thiab bridging ntawm solder pob qij txha. Hauv kev tsim cov siab -PCBA qhov ceev, qhov kub ntawm kev tswj yuav ua rau micron- qib soldering tsis raug. Yog li ntawd, nruj me ntsis siv cov txheej txheem txias cia thiab rwb thaiv tsev yog qhov tseem ceeb ntawm kev tswj xyuas kev sib txuas hauv PCBA kev tsim khoom.
Qhov laj thawj tseem ceeb vim li cas cov tshuaj txhuam hniav xav tau qhov txias cia yog los ntawm nws cov yam ntxwv ntawm cov khoom. Solder paste yog sib xyaw ntawm cov hmoov sib tov (particle loj 20-45μm) thiab flux. Cov resins thiab activators nyob rau hauv lub flux yog rhiab heev rau qhov kub thiab txias, nws yuav ua rau muaj kev cuam tshuam nyob rau hauv chav tsev kub ua rau kev ua kom attenuation, thiab cov hmoov solder kuj yuav oxidize sai heev los ua ib tug oxide zaj duab xis, cuam tshuam rau vuam wettability. Cov qauv kev lag luam kom meej meej yuav tsum tau muab tshuaj txhuam yuav tsum muab cia rau hauv qhov txias txias ntawm 2-10 degree. Qhov ntsuas kub no tuaj yeem cuam tshuam cov tshuaj tiv thaiv thiab oxidation, txuas lub txee lub neej rau ntau tshaj 6 lub hlis; Yog tias qhov ntsuas kub siab tshaj 15 degree, kev ua haujlwm ntawm cov tshuaj nplaum yuav txo qis 30% hauv 1 lub hlis, thiab yog tias nws siab tshaj 25 degree, nws yuav tsis ncaj qha.
Standardized kub tswj khiav los ntawm tag nrho lub neej voj voog ntawm solder paste. Cov khoom siv tub yees tshwj xeeb yuav tsum tau siv rau kev khaws cia, nrog rau -lub sijhawm ntsuas kub thiab kaw kom tsis txhob rov thawing; Ua ntej siv, nws yuav tsum tau sab laug kom sov nyob rau hauv ib puag ncig ntawm 18-25℃rau 4-8 xuab moos, thiab nplawm tom qab qhib lub hau thaum nws nce mus txog chav tsev kub kom tsis txhob muaj dej vapor condensation los ntawm kev ua npuas npuas. Cov tshuaj nplaum uas tsis siv tom qab qhib yuav tsum rov qab mus rau qhov txias txias hauv 24 teev, thiab nws cov viscosity (tus qauv 100-200Pa·s) yuav tsum tau sim tom qab nplawm ua ntej rov siv dua. Kev sib tov tshiab thiab qub solder paste yog txwv tsis pub.
High -kawg teb xws li automotive electronics thiab kev kho mob electronics muaj kev tswj nruj dua li solder paste. Qee lub tuam txhab tau tshaj tawm cov tshuab ua kom txias txias kom ua tiav tag nrho - txheej txheem traceability los ntawm Is Taws Nem ntawm Yam, nrog rau qhov ntsuas kub sib txawv nruj me ntsis hauv ± 1 degree. Standardized tswj tsis tsuas yog txo qhov tsis xws luag, tab sis kuj txo qis solder paste pov tseg, txuag 80,000 mus rau 120,000 yuan nyob rau hauv cov khoom nqi ib SMT ntau lawm kab txhua xyoo.
Cov kws tshaj lij hauv kev lag luam taw qhia tias nrog rau siab - qhov ceev thiab kev txhim kho me me ntawm PCBA, qhov cuam tshuam ntawm cov khoom siv tshuaj txhuam kev ua haujlwm ruaj khov ntawm cov khoom zoo yog qhov tseem ceeb zuj zus. Nyob rau hauv lub neej yav tom ntej, qhov nrov ntawm cov cuab yeej tswj qhov kub thiab txias thiab kev siv cov txheej txheem txheej txheem yuav txhawb kev hloov pauv ntawm kev tswj xyuas cov tshuaj nplaum los ntawm "passive control" mus rau "active ntxov ceeb toom", nteg cov khoom siv hauv paus rau siab - kev loj hlob zoo ntawm kev lag luam.
