Puas muaj tshuaj lom nyob rau hauv hluav taws xob soldering hlau los yog tin
Solder hlau yog ib yam khoom siv rau soldering nrog hluav taws xob soldering hlau. Txawm hais tias nws cov khoom tseem ceeb yog tin, nws kuj muaj lwm yam hlau. Feem ntau muab faib ua cov hmoov lead-dawb thiab tsis muaj hmoov txhuas (xws li ib puag ncig tus phooj ywg). Nrog rau kev taw qhia ntawm EU ROHS tus qauv, ntau thiab ntau PCB vuam factories tau xaiv cov hlau lead-dawb thiab ib puag ncig tus phooj ywg, thiab cov hlau lead-raws li cov hlau txuas tau maj mam hloov, tsis yog ib puag ncig tus phooj ywg uas tsis tuaj yeem xa tawm. Lead free solder paste, lead dawb tin hlau, thiab txhuas dawb tin tuav yog tam sim no cov khoom tseem ceeb ntawm lub khw.
Yooj yim muab tso rau: Kev puas tsuaj rau cov tin, feem ntau siv vim nws qhov qis melting point, muaj li ntawm 60 feem pua cov hlau lead thiab 40 feem pua tin, yog li soldering tin nws tus kheej yog tshuaj lom. Feem ntau ntawm cov soldering tin nyob rau hauv kev ua lag luam yog hollow thiab muaj rosin, yog li cov roj uas koj xa mus yog tej zaum volatilized thaum lub rosin nyob rau hauv lub soldering tin melts thaum vuam. Cov pa tawm los ntawm rosin kuj muaj tshuaj lom me ntsis, ua rau nws tsis hnov tsw tsw. Qhov teeb meem tseem ceeb ntawm cov khoom siv vuam thaum lub sij hawm vuam yog cov pa taws ua rau cov pa taws, txawm tias cov hlau tsis muaj hlau lead muaj qee cov hlau lead. Tus nqi txwv ntawm cov pa luam yeeb hlau lead hauv GBZ2-2002 yog qhov tsawg heev, thiab nws cov toxicity siab heev, yuav tsum muaj kev tiv thaiv tshwj xeeb. Vim muaj kev puas tsuaj los 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 los ntawm txoj cai. Vuam yam tsis muaj kev tiv thaiv zoo yog tsis tso cai. Muaj cov kev cai meej hauv ISO14000 tus qauv rau kev kho thiab kev tiv thaiv cov pa phem hauv cov txheej txheem tsim khoom.
Tin muaj cov hmoov txhuas, uas yav dhau los tau muab cais ua txoj haujlwm ua haujlwm txaus ntshai vim muaj cov hlau lead hauv cov hlau nplaum (tso npe nyob rau hauv cov kab mob ua haujlwm hauv tebchaws); Niaj hnub no, feem ntau ntawm peb cov lag luam siv lead-free soldering hlau, uas yog tsim los ntawm tin. Lub chaw tiv thaiv kab mob thiab tswj kev ntsuas tin dioxide; Tsis muaj npe nyob rau hauv National occupational disease directory. Feem ntau hais lus, cov tshuab tsis muaj hlau lead tsis tshaj tus qauv rau cov pa luam yeeb txhuas, tab sis cov tin soldering kuj muaj lwm yam kev phom sij, xws li kev phom sij ntawm flux (rosin zoo li tshuaj), uas nyob ntawm qhov xwm txheej tshwj xeeb. Cov neeg ua haujlwm feem ntau tuaj yeem saib xyuas qhov kev txheeb xyuas ntawm cov tin dispensed thiab hom dab tsi nws yog, kom lawv tuaj yeem muaj pov thawj thiab thov kom lub tuam txhab kho (lawv tuaj yeem muab kev xav rau lub koom haum sab hauv ntawm lub Hoobkas). Yog tias cov tin sib xyaw muaj cov hmoov lead, nws yog qhov tsim nyog rau lub cev. Nyob rau tib lub sijhawm, lawv khaws cia hauv lub cev thiab ua rau muaj kev puas tsuaj loj 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 noj qab haus huv. Cov ntsiab lus tsis tshua muaj hlau lead-dawb solder hlau tsis txhais hais tias nws tsis muaj txhuas. Piv nrog cov hlau lead uas muaj cov hlau lead, cov hlau tsis muaj hlau lead tsis muaj kuab paug tsawg dua rau ib puag ncig thiab tib neeg lub cev dua li cov hlau lead-muaj cov hlau. Cov roj tsim tawm thaum lub sij hawm soldering yog tshuaj lom, nrog rau cov pa roj xws li roj rosin thiab zinc chloride.
