Yuav ua li cas siv solder paste hauv PCBA txheej txheem?
(1) Cov txheej txheem yooj yim rau kev txiav txim siab qhov viscosity ntawm cov tshuaj txhuam hniav: Muab cov tshuaj txhuam cov tshuaj txhuam nrog cov spatula rau li 2-5 feeb, tuaj tos me ntsis solder paste nrog cov spatula, thiab cia cov tshuaj txhuam hniav poob lawm.Lub viscosity yog nruab nrab;Yog hais tias lub solder paste tsis plam tag nrho, lub viscosity ntawm solder paste yog siab dhau;Yog hais tias cov tshuaj txhuam hniav ua kom plam sai, qhov viscosity ntawm cov tshuaj txhuam hniav me me dhau lawm;
(2) Kev khaws cia ntawm cov tshuaj txhuam hniav: tso rau hauv ib daim ntawv kaw ntawm qhov kub ntawm 0 ° C mus rau 10 ° C, thiab lub sijhawm cia feem ntau yog 3 txog 6 lub hlis;
(3) Tom qab muab tshuaj txhuam tawm ntawm lub tub yees, nws yuav tsum tau sov so hauv chav sov li 4 teev ua ntej nws tuaj yeem siv tau.Cov txheej txheem cua sov tsis tuaj yeem siv rov qab mus rau qhov kub thiab txias;Tom qab cov tshuaj txhuam tau sov so, nws yuav tsum tau nplawm (xws li sib tov nrog lub tshuab, nplawm 1-2 feeb, nplawm los ntawm tes yuav tsum tau nplawm ntau tshaj 2 feeb) ua ntej siv;
(4) ambient kub rau solder paste luam ntawv yuav tsum yog 22 ℃ ~ 28 ℃, thiab cov av noo yuav tsum qis dua 65%;
(5) Solder paste luam ntawv
1. Thaum luam ntawv solder paste, nws raug nquahu kom siv cov tshuaj txhuam hniav nrog cov ntsiab lus hlau ntawm 85% mus rau 92% thiab lub neej ua haujlwm ntev tshaj 4 teev;
2. Printing ceev Thaum lub sij hawm luam ntawv, kev mus ncig ceev ntawm lub squeegee ntawm lub luam ntawv template yog ib qho tseem ceeb heev, vim hais tias lub solder paste xav tau sij hawm los yob thiab ntws mus rau hauv lub qhov tuag.Cov nyhuv yog qhov zoo dua thaum cov tshuaj txhuam hniav yob sib npaug ntawm cov stencil.
3. Printing siab Lub tshuab luam ntawv siab yuav tsum tau ua haujlwm nrog lub hardness ntawm squeegee.Yog tias qhov siab qis dhau lawm, lub squeegee yuav tsis ntxuav cov tshuaj pleev xim rau ntawm tus qauv.Yog hais tias lub siab loj heev los yog lub squeegee yog mos heev, lub squeegee yuav tog rau lub template.Khawb cov tshuaj nplaum los ntawm lub qhov loj.Cov mis empirical rau lub siab: Siv lub scraper ntawm ib lub hlau template.Txhawm rau kom tau txais qhov tseeb siab, pib los ntawm kev siv 1 kg ntawm lub siab rau txhua txhua 50 mm ntawm qhov ntev scraper.Piv txwv li, 300 mm scraper siv lub siab ntawm 6 kg kom maj mam txo qhov siab.Kom txog rau thaum lub solder paste pib nyob twj ywm ntawm lub template thiab tsis khawb kom huv si, ces maj mam nce lub siab kom txog rau thaum lub solder paste tsuas yog khawb tawm.Lub sijhawm no, lub siab yog qhov zoo tshaj plaws.
4. Kev tswj cov txheej txheem thiab cov txheej txheem cov txheej txheem Yuav kom ua tiav cov txiaj ntsig luam ntawv zoo, nws yog qhov yuav tsum muaj cov khoom siv hluav taws xob zoo (viscosity, hlau cov ntsiab lus, qhov siab tshaj plaws hmoov loj thiab qis tshaj qhov ua tau flux), cov cuab yeej raug (lub tshuab luam ntawv, qauv. thiab kev sib xyaw ntawm scraper) thiab cov txheej txheem raug (qhov chaw zoo, tu thiab so).Raws li cov khoom sib txawv, teeb tsa cov txheej txheem luam ntawv tsis sib xws hauv kev luam ntawv, xws li kev ua haujlwm kub, ua haujlwm siab, squeegee ceev, demoulding ceev, tsis siv neeg template tu lub voj voog, thiab lwm yam, tib lub sijhawm, nws yog ib qho tsim nyog los tsim cov txheej txheem nruj. tswj system thiab cov txheej txheem kev cai.
① Siv cov tshuaj txhuam hniav nyob rau hauv lub sij hawm siv tau nruj me ntsis raws li lub hom phiaj.Cov tshuaj txhuam hniav yuav tsum muab cia rau hauv lub tub yees rau hnub ua haujlwm.Nws yuav tsum tau muab tso rau ntawm chav tsev kub ntau tshaj 4 teev ua ntej siv, thiab tom qab ntawd lub hau tuaj yeem qhib rau kev siv.Cov kua nplaum uas siv tau yuav tsum tau muab kaw thiab khaws cia nyias.Seb qhov zoo yog tsim nyog.
② Ua ntej kev tsim khoom, tus neeg teb xov tooj siv lub tshuab tshwj xeeb stainless hlau nplawm riam los txhuam cov tshuaj txhuam kom ua kom nws txawm.
③ Tom qab thawj qhov kev tshuaj ntsuam luam ntawv lossis cov cuab yeej hloov kho ntawm lub luag haujlwm, lub solder paste thickness tester yuav tsum tau siv los ntsuas cov luam ntawv thickness ntawm cov tshuaj txhuam.Cov ntsiab lus xeem raug xaiv ntawm 5 cov ntsiab lus ntawm qhov chaw xeem ntawm cov ntawv luam tawm, suav nrog cov ntsiab lus sab sauv thiab qis, sab laug thiab sab xis thiab nruab nrab cov ntsiab lus, thiab sau cov txiaj ntsig.Lub thickness ntawm solder paste yog li ntawm -10% mus rau +15% ntawm template thickness.
④ Thaum lub sij hawm tsim khoom, 100% kev tshuaj xyuas yog ua los ntawm kev luam ntawv zoo ntawm cov tshuaj nplaum.Cov ntsiab lus tseem ceeb yog seb tus qauv muab tshuaj txhuam puas ua tiav, seb lub thickness yog zoo li cas, thiab seb puas muaj cov tshuaj txhuam hniav tipping.
⑤ Ntxuav tus qauv raws li cov txheej txheem yuav tsum tau ua tom qab ua haujlwm tiav.
⑥ Tom qab kev sim luam ntawv lossis luam ntawv tsis ua haujlwm, cov tshuaj pleev xim rau ntawm cov ntawv luam tawm yuav tsum tau muab ntxuav kom huv nrog cov cuab yeej ntxuav ultrasonic thiab ziab, los yog ntxuav nrog dej cawv thiab roj siab kom tsis txhob muaj cov tshuaj pleev xim rau ntawm lub rooj tsavxwm los ntawm kev tshwm sim thaum nws yog. siv dua.Solder npas thiab lwm yam tshwm sim tom qab reflow soldering
NeoDen muab tag nrho SMT sib dhos kab kev daws teeb meem, suav nrog SMT reflow qhov cub, yoj lub tshuab siv lub tshuab, xaiv thiab tso tshuab, tshuab luam ntawv muab tshuaj txhuam, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X-Ray tshuab, SMT sib dhos kab khoom, PCB ntau lawm Equipment SMT spare qhov chaw, thiab lwm yam yam SMT tshuab koj xav tau, thov hu rau peb kom paub ntxiv:
Hangzhou NeoDen Technology Co., Ltd
Post lub sij hawm: Jul-21-2020