Shelf moyo wa PCB?Nthawi yophika ndi kutentha?
Nthawi yosungirako PCB, ndi kutentha ndi nthawi yogwiritsira ntchito uvuni wa mafakitale kuphika PCB zonse zimayendetsedwa ndi makampani. Kodi alumali moyo wa PCB ndi chiyani?Ndipo momwe mungadziwire nthawi yophika ndi kutentha? 1. Mafotokozedwe a PCB control 1. Kutsegula ndi kusunga PCB (1) The Chithunzi cha PCB itha kugwiritsidwa ntchito mwachindunji pa intaneti mkati mwa miyezi iwiri kuchokera tsiku lopangidwa la bolodi ya PCB yosindikizidwa komanso yosatsegulidwa (2) Tsiku lopanga bolodi la PCB lili mkati mwa miyezi 2, ndipo tsiku lotsegulira liyenera kulembedwa pambuyo potsegula. (3) PCB board kupanga tsiku ndi mkati 2 miyezi, pambuyo unpacking, ayenera Intaneti ndi ntchito mkati 5 masiku 2. PCB kuphika (1) Ngati PCB yosindikizidwa ndi kumasulidwa kwa masiku oposa 5 mkati mwa miyezi 2 kuchokera tsiku lopanga, chonde kuphika pa 120 ± 5 ℃ kwa ola limodzi. (2) Ngati PCB ndi yoposa miyezi 2 kuchokera tsiku kupanga, chonde kuphika pa 120±5 ℃ kwa ola 1 musanalowe pa intaneti. (3) Ngati PCB ili miyezi 2-6 yadutsa tsiku lopanga, chonde ikani pa 120 ± 5 ℃ kwa maola 2 musanalowe pa intaneti. (4) Ngati PCB ili ndi miyezi 6 mpaka chaka chimodzi kuposa tsiku lopanga, chonde phikani pa 120 ± 5 ° C kwa maola 4 musanalowe pa intaneti. (5) PCB yophikidwa iyenera kugwiritsidwa ntchito mkati mwa masiku 5 (kuyikidwa mu IR REFLOW), ndipo PCB iyenera kuphikidwa kwa ola lina isanayambe kugwiritsidwa ntchito pa intaneti. (6) Ngati PCB yadutsa chaka chimodzi kuchokera tsiku lopangidwa, chonde ikani pa 120±5℃ kwa maola 4 musanalowe pa intaneti, ndiyeno tumizani ku fakitale ya PCB kuti mupozerenso malata musanalowe pa intaneti. 3. PCB kuphika njira (1) Ma PCB akuluakulu (16 PORTs ndi pamwamba, kuphatikizapo 16 PORTs) amayikidwa mozungulira, ndi zidutswa za 30 mu stack.Tsegulani uvuni mkati mwa mphindi 10 mukamaliza kuphika, chotsani PCB, ndikuyiyika pansi kuti iziziziritsa (mufunika kukanikiza anti-plate bay fixture) (2) Ma PCB ang'onoang'ono ndi apakatikati (kuphatikiza 8PORTs pansipa 8PORT) amayikidwa mozungulira.Chiwerengero chachikulu cha stack ndi zidutswa 40.Chiwerengero cha mtundu woyima chilibe malire.Tsegulani uvuni ndikutulutsa PCB mkati mwa mphindi 10 mutatha kuphika.Banwan fixture) 2. Kusungidwa ndi kuphika kwa PCBs m'madera osiyanasiyana Nthawi yeniyeni yosungiramo ndi kutentha kwa kuphika kwa PCB sikungokhudzana ndi mphamvu yopangira ndi kupanga mapangidwe a wopanga PCB, komanso kukhala ndi ubale wabwino ndi dera. PCB yopangidwa ndi njira ya OSP ndi kumiza golide koyera nthawi zambiri imakhala ndi shelufu ya miyezi 6 mutatha kulongedza, ndipo nthawi zambiri sivomerezedwa kuti iphike njira ya OSP. Kusunga ndi kuphika nthawi ya PCB ili ndi zambiri zokhudzana ndi dera.Kum'mwera, chinyezi chimakhala cholemera kwambiri, makamaka ku Guangdong ndi Guangxi.M’mwezi wa March ndi April chaka chilichonse, padzakhala nyengo ‘yobwerera kum’mwera,’ ndipo kumagwa mvula tsiku lililonse.Mopitiriza, kunali chinyezi kwambiri panthawiyi.PCB poyera mpweya ayenera kugwiritsidwa ntchito mkati maola 24, apo ayi n'zosavuta oxidize.Mukatsegula mwachizolowezi, ndi bwino kugwiritsa ntchito maola 8.Kwa ma PCB ena omwe amafunika kuphikidwa, nthawi yophika idzakhala yayitali.Kumadera akumpoto, nyengo imakhala yowuma, nthawi yosungira PCB idzakhala yayitali, ndipo nthawi yophika ikhoza kukhala yayifupi.Kutentha kophika nthawi zambiri kumakhala 120 ± 5 ℃, ndipo nthawi yophika imatsimikiziridwa malinga ndi momwe zilili. Pakuti PCB yosungirako nthawi, kuphika nthawi ndi kutentha, mavuto enieni ayenera kusanthula mwatsatanetsatane, ndi kusankha enieni ayenera kupangidwa pamaziko a PCB kasamalidwe ndi kulamulira specifications, malinga ndi mphamvu kupanga, ndondomeko, dera ndi nyengo opanga osiyanasiyana. . 
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