Momwe Mungapewere Zotsalira Zomatira & Zomatira Kutuluka kwa PTFE Kutentha Kwambiri Tepi Mukateteza Zala Zagolide za PCB mu SMT Mounting

Jiangsu Aokai New Materials, katswiri wopanga tepi yotentha kwambiri ya PTFE, amapereka chitsogozo chaukadaulo. Pamene tepi ya PTFE yotentha kwambiri imagwiritsidwa ntchito kuteteza zala za golide za PCB panthawi ya msonkhano wa SMT, zotsalira zotsalira (zotsalira zotsalira zomwe zatsalira pa zala za golide pambuyo pa kupukuta tepi) ndi magazi omatira (zomatira zimafewetsa ndi kusefukira pansi pa kutentha kwakukulu, kuwononga malo osatetezedwa kapena malo a PCB) pambuyo pa reflow soldering makamaka chifukwa cha kusankha kolakwika kwa tepi kapena kusankhidwa kwa tepi yolakwika. Pansipa pali mayankho mwadongosolo:

I. Root Cause Analysis of Adhesive Residue & Bleed

1. Zotsalira Zomatira  Zimachitika pamene zomatira zikuvutika kulephera kogwirizana (kung'ambika kwamkati kwa zomatira zosanjikiza) kapena kulephera kusuntha kwapakati (zomatira zimachotsa gawo lapansi ndikumatira ku zala zagolide). Zoyambitsa zodziwika bwino ndi monga kusakwanira kwa kutentha kwa tepi, zomatira zakale, kapena kupemba nthawi kosayenera.

2. Zomatira Magazi  Kukhuthala kwa zomatira kumatsika kwambiri pansi pa reflow kutentha kwambiri, zomwe zimapangitsa kuti madzi achuluke kwambiri. Pansi pa kuthamanga kwa lamination ndi capillary action, zomatira zimasefukira m'mphepete mwa tepi. Izi nthawi zambiri zimayamba chifukwa cha zomatira zokhuthala kwambiri, kukwera msanga kwa kutentha, kapena kutsika kwamphamvu kwa zomatira zokha.

II. Kusankha Tepi Moyenera - The Core Solution

Tepi wamba wa PTFE sangathe kukwaniritsa zofunikira kwambiri za njira za SMT. Zogulitsa zomwe zidapangidwira chitetezo cha chala chagolide cha SMT ziyenera kusankhidwa, ndikuyika patsogolo magwiridwe antchito a makina omatira:

 

· Temperature Resistance Grade : Kutentha kwakukulu kwa nthawi yochepa ≥ 300 ° C, kutentha kwa utumiki kosalekeza ≥ 260 ° C, kupitirira kwambiri kutentha kwapamwamba kwa soldering yopanda lead reflow soldering (245-250 ° C).

· Makulidwe a Zomatira : Makulidwe apamwamba samafanana ndi kumamatira mwamphamvu. Kondani matepi okhala ndi makulidwe onse a 0.08-0.13mm, okhala ndi zigawo zoonda koma zomata kwambiri kuti muchepetse kuopsa kwa magazi.

· Chitsimikizo Chopanda Kukhetsa magazi & Chotsalira Chotsalira : Pemphani malipoti oletsa magazi komanso opanda zotsalira operekedwa ku chitetezo cha chala chagolide cha SMT kuchokera kwa ogulitsa, ndikuyesa kuyesa ng'anjo yeniyeni ndi zitsanzo.

III. Six-Step Process Control Standard

1. Pre-Lamination: Pamwamba Kuyeretsa & Pre-Kuchiza

Kuchotseratu mafuta: Zala zagolide ndi malo ozungulira PCB akuyenera kukhala opanda madontho a thukuta, zodetsa mafuta ndi zotsalira zotuluka. Pukutani ndi nsalu yopanda lint yoviikidwa mu anhydrous ethanol kapena isopropyl alcohol (IPA), ndiyeno muziwumitsa mpweya.

· Dry substrate: Onetsetsani kuti ma PCB alibe chinyezi kwathunthu musanagwiritse ntchito tepi.

2. Lamination: Zero Tension & Full Air Evacuation

Osatambasula tepi: Gawo la PTFE lili ndi ductility wabwino. Kutambasula panthawi ya lamination kumayambitsa kupsinjika kwamkati komwe kumayambitsa kuchepa kwa kutentha kwambiri, zomwe zimapangitsa kuti zomatira zing'ambika, zotsalira kapena kutuluka magazi. Ikani tepiyo kukhala yosanja mwachibadwa pa zala zagolide ndikusindikiza mopepuka kuti mumamatire koyamba.

Kuchotsa mpweya wathunthu : Gwiritsani ntchito chodzigudubuza chodzipatulira kapena hard scraper kukankhira pang'onopang'ono kuchokera pakati kupita ku mbali zonse ziwiri kuti mugwirizane. Onetsetsani kuti mumamatira m'mphepete mwathunthu popanda thovu lotsekeka; thovu limakula pansi pa kutentha ndikukweza m'mphepete mwa tepi, zomwe zimapangitsa kuti zomatira zisefukire.

· Kuyanjanitsa kolondola: Gwirizanitsani m'mphepete mwa tepiyo ndi chala chagolide kapena kuyika pang'ono ndi 0.2-0.5mm (ngati mapangidwe alola). Osaphimba zomatira kapena ma vias, chifukwa capillary siphonage imakokera zomatira zosungunuka kunja.

3. Reflow Soldering: Konzani Kutentha Mbiri

• Tsatirani mfundo za kutentha kwa tepi: Yesani kutentha kwenikweni kwa bolodi kuti mutsimikize kuti kutentha kwapamwamba komanso nthawi yonse yotenthetsera imakhalabe m'malo ololedwa ndi tepiyo.

Njira yotenthetsera yofatsa: Sungani pang'onopang'ono kutentha (<2°C/s) musanafike kumalo ofewetsa zomatira (150°C–200°C). Mwadzidzidzi lakuthwa kutentha spikes mofulumira kufewetsa zomatira ndi kugwa mamasukidwe ake mamasukidwe, zikubweretsa kwambiri magazi.

4. Kusamba Nthawi: Kuzizira Kozizira Kumapereka Zotsatira Zabwino Kwambiri

Kuziziritsa mokwanira mpaka kutentha kwa chipinda: Mukatenthetsa, dikirani mpaka kutentha kwa PCB kutsika pansi pa 50 ° C (kutentha koyenera kozungulira) musanasegule tepi. Zomatira zimakhalabe zofewa komanso zotsika-kugwirizana pa kutentha kwakukulu; kukakamiza otentha peeling mosavuta kumayambitsa wosanjikiza kulekana ndi zotsalira guluu.

· Njira yakung'amba: Pendani pang'onopang'ono pakona yotsika ya 180 ° ndi mphamvu yofanana. Osakoka zolimba ngati kutsutsa kwapezeka.

5. Kuwongolera Njira: Kuwongolera Shelf Moyo & Kugwiritsanso Ntchito Zozungulira

Ikani ndikukonza nthawi yomweyo: Ma PCB okhala ndi tepi yopangidwa ndi laminated alowe mung'anjo ya reflow nthawi yomweyo. Pewani kusungirako nthawi yayitali (maola opitilira 24) mumsonkhanowu kuti mupewe kuyamwa kwa chinyezi komanso kuchulukana kwafumbi.

· Kugwiritsa ntchito kamodzi kokha podutsa ng'anjo: Tepi yotentha kwambiri ya SMT ndi yotayika. Ngakhale tepiyo ikuwoneka yosasunthika pambuyo pa ng'anjo imodzi, zomatirazo zadutsana ndi kukalamba; Kutentha kwachiwiri kudzachititsa zotsalira zomatira kapena kulephera kumamatira. Kwa ma PCB okhala ndi mbali ziwiri, sinthani ndi tepi yatsopano musanakonze mbali yachiwiri mutadutsa koyamba.

6. Kulephera Kuchita Zadzidzidzi & Kutsimikizira

Kutaya zotsalira zazing'ono zotsalira : Imitsani kupanga nthawi yomweyo zotsalira zikadziwika. Pukuta pang'onopang'ono ndi nsalu yopanda lint yonyowa ndi IPA; tumizani matabwa oyeretsera akatswiri pazovuta kwambiri. Osasakaza ndi zida zolimba.

Kutsimikizika kwatsopano kwa tepi: Chitani zoyeserera zonse ndi 1:1 ma PCB enieni. Mukadutsa m'ng'anjo, tsegulani tepiyo ndikuyang'ana madera a zala zagolide pansi pa chokulitsa 40-50x kuti mutsimikizire ziro zotsalira ndi zomatira ziro kusefukira.

Zomwe zili pamwambapa zaukadaulo zimaperekedwa ndi Malingaliro a kampani Jiangsu Aokai New Materials Technology Co., Ltd.

Ngati mukufuna kudziwa mwatsatanetsatane, zochitika ntchito ndi mayankho makonda athu zonse katundu katundu kuphatikizapo PTFE mkulu kutentha nsalu, PTFE mkulu-kutentha zomatira tepi, PTFE mkulu-kutentha mauna lamba, msokonezo kutentha atolankhani lamba, single-mbali PTFE nsalu, mkulu kutentha zosagwira magalasi, kukhudzana ndi magalasi zosagwira magalasi, chonde kukhudzana ndi magalasi zosagwira magalasi conveyor.

· Mafoni a Utumiki: Bambo Guo +86 18944819998

· Nambala yafoni yautumiki: Bambo Liu +86 13705266308

Nthawi zonse timatsatira filosofi yautumiki waukatswiri ndi kukhulupirika, kupereka ndi mtima wonse mayankho amakampani omwe amasiyanitsidwa ndi ntchito zamakasitomala oganiza bwino kwa onse othandizana nawo!