Puas muaj tshuaj lom nyob rau hauv cov hlau?
Qhov tseeb, nws nyob ntawm seb cov hlau tsis muaj hlau lead lossis tsis muaj txhuas, thiab nws yuav tsum tau kuaj xyuas cov ntshav txhuas tsis tu ncua. Yog tias nws tsis dhau tus qauv, yuav tsis muaj teeb meem dab tsi. Puas yog lub solder lom? Feem ntau hais lus, yog tias kev tiv thaiv thiab cov khoom siv raw khoom tau ua raws li lub teb chaws tus qauv, solder yuav tsis ua rau muaj kev puas tsuaj loj. Tam sim no cov khoom tsis muaj hlau lead yog siv los ua.
Lead yog ib qho tshuaj lom. Kev nqus dej ntau dhau yuav ua rau muaj tshuaj lom lom, thiab kev noj tshuaj tsawg tsawg tuaj yeem cuam tshuam rau tib neeg kev txawj ntse, lub paj hlwb thiab lub cev xeeb tub. Lub alloy ntawm tin thiab txhuas feem ntau yog siv solder, uas muaj hluav taws xob zoo conductivity thiab tsawg melting point, yog li nws tau siv nyob rau hauv vuam txheej txheem rau lub sij hawm ntev. Nws toxicity feem ntau yog los ntawm txhuas. Lead pa luam yeeb uas tsim los ntawm soldering yog ib qho yooj yim rau txhuas lom.
Cov hlau lead tuaj yeem tsim cov khoom siv lead ua, tag nrho cov no tau muab cais ua cov khoom txaus ntshai. Hauv tib neeg lub cev, hlau lead yuav cuam tshuam rau lub hauv nruab nrab lub paj hlwb thiab lub raum. Ib puag ncig toxicity ntawm cov hlau lead rau qee cov kab mob feem ntau tau lees paub. Cov ntshav lead concentration siab tshaj 10ug / dl yuav tsim cov teebmeem biochemical rhiab heev. Yog hais tias cov ntshav lead concentration ntau tshaj 60 ~ 70ug / dl tom qab raug mus ntev, nws yuav ua rau cov tshuaj lom tshuaj lom neeg.
Lead yog tshuaj lom, tsis hais seb nws loj los tsis. Nws tsuas yog cov hlau zoo tib yam xwb. Yog tias ntau dhau, nws yuav raug tshuaj lom. Thaum soldering, yuav muaj cov pa luam yeeb, uas muaj cov khoom tsim kev puas tsuaj rau lub cev. Thaum ua haujlwm, nws yog qhov zoo tshaj rau hnav lub npog ntsej muag, tab sis nws tseem yuav muaj qee yam cuam tshuam. Tau kawg, yog tias cov hlau tsis muaj hlau lead tuaj yeem siv tau, nws yuav muaj kev nyab xeeb ntau dua li cov hlau lead.
Puas yog cov hlau lead tsis muaj tshuaj lom?
Solder hlau, cov khoom siv hluav taws xob nrog cov hluav taws xob soldering hlau, feem ntau yog tsim los ntawm cov tin, tab sis nws kuj muaj lwm yam hlau. Feem ntau muab faib ua txhuas thiab tsis muaj txhuas (uas yog, kev tiv thaiv ib puag ncig). Nrog rau kev qhia txog ROHS cov qauv hauv European Union, ntau thiab ntau PCB vuam factories tam sim no xaiv cov hlau lead-dawb thiab ib puag ncig-phooj ywg, thiab solder hlau nrog txhuas yog maj mam hloov, uas tsis yog ib puag ncig tus phooj ywg. Lead-free solder paste, lead-free solder wire thiab lead-free solder bar yog cov khoom tseem ceeb ntawm kev ua lag luam tam sim no.
Txhawm rau muab nws yooj yim: kev phom sij dav dav yog tshuaj lom vim nws cov ntsiab lus melting tsawg, muaj txog 60 feem pua cov hmoov txhuas thiab 40 feem pua tin. Feem ntau ntawm cov solders nyob rau hauv lub lag luam yog hollow thiab puv nrog rosin, yog li cov roj uas koj tau hais yog kwv yees yuav volatilized thaum lub rosin nyob rau hauv lub solder melts thaum vuam. Cov roj volatilized los ntawm rosin kuj yog tshuaj lom me ntsis, uas yog qhov tsis kaj siab heev. Lead fume yog qhov teeb meem loj tshaj plaws hauv kev sib txuas. Txawm tias tsis muaj hmoov txhuas muaj cov hmoov txhuas. Tus nqi txwv ntawm cov pa luam yeeb txhuas hauv GBZ2-2002 yog qhov tsawg heev, thiab nws muaj tshuaj lom heev, yog li nws yuav tsum tau tiv thaiv. Vim yog kev puas tsuaj ntawm cov txheej txheem vuam rau tib neeg lub cev thiab ib puag ncig, hauv Tebchaws Europe, kev tiv thaiv cov neeg ua haujlwm vuam thiab ib puag ncig tau raug tswj hwm raws li txoj cai, thiab kev vuam yam tsis muaj kev tiv thaiv kev tiv thaiv tsis raug tso cai. Nyob rau hauv ISO14000 tus qauv, muaj cov kev cai meej ntawm kev kho thiab kev tiv thaiv kev ua qias tuaj hauv kev sib txuas ntau lawm.
Tin muaj cov hmoov lead. Yav dhau los, txhuas nyob rau hauv solder hlau cais solder raws li ib tug ua hauj lwm txaus ntshai ncej (nyob rau hauv lub teb chaws ua hauj lwm kab mob catalogue); Tam sim no peb cov tuam txhab lag luam siv cov hlau lead-free solder hlau, cov khoom tseem ceeb yog tin, thiab Lub Chaw Tiv Thaiv Kab Mob thiab Tiv Thaiv Kev Ntsuas tin dioxide; Nws tsis yog nyob rau hauv lub teb chaws catalog ntawm kev ua hauj lwm kab mob. Feem ntau hais lus, cov pa luam yeeb txhuas yuav tsis dhau tus qauv hauv cov txheej txheem leadfree, tab sis muaj lwm yam kev phom sij hauv cov khoom siv, xws li flux (rosin), uas nyob ntawm qhov xwm txheej tshwj xeeb. Cov neeg ua haujlwm feem ntau tuaj yeem saib lub logo lub tin yog dab tsi thiab nws yog dab tsi, kom lawv tuaj yeem nrhiav pov thawj thiab nug lub tuam txhab kom kho nws (lawv tuaj yeem muab lawv cov kev xav rau lub koom haum ua lag luam sab hauv ntawm lub Hoobkas). Yog hais tias cov tin npaj muaj cov hmoov lead, nws yuav tsum muaj kev phom sij rau kev noj qab haus huv. Tom qab ib tug ntev lub sij hawm, lawv accumulates nyob rau hauv lub cev thiab ua phem heev rau lub cev tsis muaj zog ntawm lub paj hlwb.
Lead-free solder wire yog ib puag ncig tus phooj ywg, tab sis cov hlau lead-dawb solder hlau kuj ua rau tib neeg lub cev. Cov ntsiab lus tsis tshua muaj hlau lead-dawb solder hlau tsis muaj hlau lead. Piv nrog cov hlau lead uas muaj cov hlau lead, cov hlau tsis muaj hlau lead tsis muaj kuab paug rau ib puag ncig thiab tib neeg lub cev ntau dua li cov hlau lead. Cov roj uas tsim thaum lub sij hawm soldering yog tshuaj lom, nrog rau cov roj rosin, zinc chloride thiab lwm yam roj vapors.
Yuav ua li cas tiv thaiv hluav taws xob soldering hlau solder hlau tsis muaj tshuaj lom;
Ua ntej ntawm tag nrho cov, lub Hoobkas PCB yuav tsum siv ROHS tin hlau thaum soldering Cheebtsam nrog hluav taws xob soldering hlau, thiab ceev faj: piv txwv li, hnav hnab looj tes, qhov ncauj qhov ntswg los yog roj qhov ncauj qhov ntswg, xyuam xim rau qhov cua nyob rau hauv lub chaw ua hauj lwm, muaj ib tug zoo pa system, them. ua tib zoo saib xyuas tom qab ua haujlwm, thiab haus cov mis nyuj kom tsis txhob muaj cov tshuaj txhuas hauv cov khoom siv.
1. Noj ib pliag. Feem ntau, siv sijhawm ib teev los so li 15 feeb kom txo tau qhov qaug zog, vim tias qhov kev tawm tsam yog qhov phem tshaj thaum koj nkees.
2, haus luam yeeb tsawg dua thiab haus dej ntau dua, yog li ntawd feem ntau ntawm cov khoom tsis zoo tuaj yeem raug tshem tawm thaum nruab hnub.
3, haus cov kua txiv hmab txiv ntoo los yog dej zib ntab ua ntej yuav mus pw, uas tuaj yeem txo qhov hluav taws kub thiab pab lub siab, thiab cov taum thiab zib ntab tuaj yeem tshem tawm ntau cov hlau lead thiab hluav taws xob absorbed!
4, tuaj yeem zam tau hluav taws xob, sim zam kom tsis txhob siv ntau lub xov tooj, PHS siv cov xov tooj ntawm tes tsawg dua, thiab siv cov xov tooj ntawm tes thaum tsis muaj kev tawm mus.
5, koj tuaj yeem ua kom cov hlau nplaum ci dua thiab sim siv lub taub hau vuam ntawm PPD, yog li thaum qhov kub nce mus txog, koj tuaj yeem siv cov roj vuam thiab rosin tsawg dua los txo qhov kev puas tsuaj rau koj lub cev.
6. Thaum vuam cov roj thiab cov pa luam yeeb, sim tig koj lub taub hau mus rau sab. Thaum txhuam Tianna dej, koj yuav tsum tig koj lub taub hau mus rau sab thiab sim tuav koj ua pa.
7. Siv dej Tianna tsawg dua thiab haus cawv ntau dua, thiab txhuam nrog cawv ib ntus, thiab cov nyhuv zoo sib xws.
8. Ntxuav koj ob txhais tes.
9. Ua ntej yuav mus pw. Sim mus pw ntxov thiab sawv ntxov kom pw tsaug zog txaus. Tsuav koj tsaug zog zoo, impurities tuaj yeem tawm hauv koj lub cev.
10. Ua haujlwm nrog lub npog ntsej muag.
