I-SMT adhesive, eyaziwa nangokuthi i-SMT adhesive, i-SMT enamathelayo ebomvu, ngokuvamile iyinamathisela ebomvu (nayo ephuzi noma emhlophe) esatshalaliswa ngokulinganayo nge-hardener, i-pigment, i-solvent nezinye izinto ezinamathelayo, ezisetshenziselwa kakhulu ukulungisa izingxenye ebhodini lokuphrinta, ngokuvamile lisatshalaliswa ngokukhipha. noma izindlela zokuphrinta isikrini sensimbi. Ngemva kokunamathisela izingxenye, zibeke kuhhavini noma kuhhavini lokuhambisa kabusha ukuze ufudumale futhi uqine. Umehluko phakathi kwayo kanye ne-solder paste yukuthi yelashwa ngemva kokushisa, izinga lokushisa layo lokuqandisa liyi-150 ° C, futhi ngeke lihlakazeke ngemva kokushisa kabusha, okusho ukuthi, inqubo yokuqina kokushisa kwe-patch ayinakuguqulwa. Umphumela wokusetshenziswa kokunamathela kwe-SMT uzohluka ngenxa yezimo zokuphulukisa ezishisayo, into exhunyiwe, okokusebenza okusetshenzisiwe, kanye nendawo yokusebenza. I-adhesive kufanele ikhethwe ngokuvumelana nenqubo yebhodi lesifunda ephrintiwe (PCBA, PCA).
Izici, ukusetshenziswa kanye nethuba lokunamathela kwe-SMT patch
Iglue ebomvu ye-SMT iwuhlobo lwenhlanganisela ye-polymer, izakhi eziyinhloko yizinto eziyisisekelo (okungukuthi, izinto eziyinhloko zamangqamuzana aphezulu), isigcwalisi, i-ejenti yokwelapha, ezinye izithasiselo nokunye. Iglue ebomvu ye-SMT ine-viscosity fluidity, izici zokushisa, izici zokumanzisa nokunye. Ngokwalesi sici se-glue ebomvu, ekukhiqizeni, inhloso yokusebenzisa i-glue ebomvu iwukuba izingxenye zinamathele ngokuqinile ebusweni be-PCB ukuze zingawi. Ngakho-ke, i-patch adhesive iwukusetshenziswa okumsulwa kwemikhiqizo yenqubo engabalulekile, futhi manje ngokuthuthuka okuqhubekayo kwe-PCA design kanye nenqubo, ngokugeleza kabusha kwembobo kanye ne-double side-side reflow welding iye yabonakala, futhi inqubo yokufaka i-PCA isebenzisa i-adhesive patch. ibonisa ukuthambekela kokuncipha.
Inhloso yokusebenzisa okunamathelayo kwe-SMT
① Vimbela izingxenye ukuthi zingawi ekuhlanganisweni kwe-wave soldering (inqubo ye-wave soldering). Uma usebenzisa i-wave soldering, izingxenye zigxilwe ebhodini eliphrintiwe ukuvimbela izingxenye ukuthi zingawi lapho ibhodi eliphrintiwe lidlula emgodini we-solder.
② Vimbela olunye uhlangothi lwezingxenye ukuthi zingawi ku-reflow welding (inqubo ye-reflow welding ephindwe kabili). Enkambweni ye-welding ye-double-side reflow welding, ukuze kuvinjelwe amadivaysi amakhulu ohlangothini oludayisiwe ukuthi angawi ngenxa yokuncibilika kokushisa kwe-solder, i-SMT patch glue kufanele yenziwe.
③ Vimbela ukugudluzwa kanye nokuma kwezingxenye (inqubo ye-reflow welding, inqubo yokumboza ngaphambili). Isetshenziswa ezinqubweni zokushisela okugelezayo kanye nezinqubo zokumboza ngaphambili ukuvimbela ukufuduka kanye nokukhuphuka ngesikhathi sokukhuphuka.
④ Maka (i-wave soldering, i-reflow welding, i-pre-coating). Ngaphezu kwalokho, lapho amabhodi aphrintiwe kanye nezingxenye zishintshwa ngamaqoqo, i-patch adhesive isetshenziselwa ukumaka.
I-SMT adhesive ihlukaniswa ngokwendlela yokusetshenziswa
a) Uhlobo lokukhuhla: ukulinganisa kwenziwa ngemodi yokuphrinta kanye nokukhuhla yensimbi yensimbi. Le ndlela iyona esetshenziswa kakhulu futhi ingasetshenziswa ngokuqondile emshinini wokunamathisela we-solder. Izimbobo zensimbi kufanele zinqunywe ngokuya ngohlobo lwezingxenye, ukusebenza kwe-substrate, ubukhulu kanye nobukhulu kanye nokuma kwezimbobo. Izinzuzo zayo ijubane eliphezulu, ukusebenza kahle okuphezulu kanye nezindleko eziphansi.
b) Uhlobo lokukhipha: Iglue isetshenziswa ebhodini lesifunda eliphrintiwe ngokukhipha izinto zokusebenza. Imishini ekhethekile yokukhipha impahla iyadingeka, futhi izindleko ziphezulu. Imishini yokukhipha iwukusetshenziswa komoya ocindezelwe, ingcina ebomvu ngokusebenzisa ikhanda elikhethekile lokukhipha ku-substrate, ubukhulu bephoyinti leglue, kungakanani, ngesikhathi, ububanzi beshubhu yokucindezela kanye neminye imingcele yokulawula, umshini wokukhipha unomsebenzi oguquguqukayo. . Ezingxenyeni ezihlukene, singasebenzisa amakhanda ahlukene okusabalalisa, ukusetha imingcele ukuze ushintshe, ungashintsha futhi ukuma nobuningi bephoyinti leglue, ukuze ufeze umphumela, izinzuzo zilula, ziguquguqukayo futhi zizinzile. Ububi bulula ukuba nomdwebo wezintambo namabhamuza. Singalungisa amapharamitha okusebenza, isivinini, isikhathi, umfutho womoya, nezinga lokushisa ukuze sinciphise lokhu kushiyeka.
I-SMT Patching Typical CICC
Qaphela:
1. Ukuphakama kwezinga lokushisa lokuphulukisa kanye nesikhathi eside sokuphulukisa, amandla okunamathela anamandla.
2. Ngenxa yokuthi izinga lokushisa le-patch glue lizoshintsha ngobukhulu bezingxenye ze-substrate kanye nesikhundla sesitika, sincoma ukuthola izimo zokuqina ezifanele kakhulu.
Isitoreji se-SMT patch glue
Ingagcinwa izinsuku ezingu-7 ekamelweni lokushisa, isitoreji sikhulu kunoJuni ngaphansi kuka-5 ° C, futhi singagcinwa izinsuku ezingaphezu kwezingu-30 ku-5-25 ° C.
Ukuphathwa kwe-SMT patch gum
Ngenxa yokuthi ingcina ebomvu yesichibi se-SMT ithintwa izinga lokushisa, izici ze-viscosity, i-liquidity, nokuba manzi kwe-SMT, ingcina ebomvu yesichibi se-SMT kufanele ibe nezimo ezithile nokuphathwa okujwayelekile.
1) Ingcina ebomvu kufanele ibe nenombolo ethize yokugeleza, nezinombolo ngokuya ngenani lokudla, usuku, kanye nezinhlobo.
I-2) I-glue ebomvu kufanele igcinwe esiqandisini sika-2 kuya ku-8 ° C ukuvimbela izici zezici ngenxa yezinguquko zokushisa.
I-3) Ukubuyiselwa kweglue ebomvu kudinga amahora angu-4 ekamelweni lokushisa, futhi isetshenziswa ngokuhleleka okuthuthukisiwe kuqala.
4) Ngemisebenzi yokugcwalisa amaphuzu, i-glue tube glue red kufanele yakhelwe. Ukuze iglue ebomvu engakaze isetshenziswe ngesikhathi esisodwa, kufanele ibuyiselwe esiqandisini ukuze ulondoloze.
5) Gcwalisa ifomu lokurekhoda ngokunembile. Isikhathi sokuphumula nokufudumala kufanele sisetshenziswe. Umsebenzisi udinga ukuqinisekisa ukuthi ukutakula kuqediwe ngaphambi kokuthi kusetshenziswe. Ngokuvamile, iglue ebomvu ayikwazi ukusetshenziswa.
Izici zenqubo ye-SMT patch glue
Ukuqina kokuxhuma: Iglue yesichibi se-SMT kufanele ibe namandla okuxhumana aqinile. Ngemuva kokuqina, izinga lokushisa le-weld melt alihlutshiwe.
I-point coating: Njengamanje, indlela yokusabalalisa yebhodi lokuphrinta isetshenziswa kakhulu, ngakho-ke kuyadingeka ukuthi kube nokusebenza okulandelayo:
① Zijwayeze nezitika ezahlukahlukene
② Kulula ukusetha ukunikezwa kwengxenye ngayinye
③ Vele uzivumelanise nezinhlobo zengxenye yokubuyisela
④ Imbobo yephoyinti eqinile
Ijwayelana nemishini enesivinini esikhulu: I-patch glue manje kufanele ihlangabezane ne-high-speed coating kanye nomshini wokuchibiyela onesivinini esikhulu. Ngokuqondile, ichashazi lejubane eliphezulu lidonswa ngaphandle kokudweba, futhi lapho unamathisele wejubane eliphezulu efakwe, ibhodi eliphrintiwe lisendleleni yokudlulisela. Ukunamathela kwe-tape gum kufanele kuqinisekise ukuthi ingxenye ayinyakazi.
I-Ritting and falling: Uma i-patch glue isigcotshwe ku-pad, ingxenye ayikwazi ukuxhunywa ekuxhumekeni kukagesi ngebhodi eliphrintiwe. Ukuze ugweme amaphedi okungcola.
Ukwelashwa kwezinga lokushisa eliphansi: Uma uqina, qala usebenzise izingxenye ezifakiwe ezingamelani nokushisa eziphakeme -welded ezinganele ukuze zishiselwe, ngakho-ke kuyadingeka ukuthi izimo eziqinile kufanele zihlangabezane nezinga lokushisa eliphansi kanye nesikhathi esifushane.
Ukuzilungisa ngokwakho: Enqubweni ye-welding kanye ne-pre-coating, i-patch glue iqinisiwe futhi igxiliwe izingxenye ngaphambi kokuba i-weld incibilike, ngakho-ke izovimbela ukucwiliswa kwe-meta nokuzilungisa ngokwakho. Kuleli phuzu, abakhiqizi benze iglue ye-self-adjustable patch.
SMT patch glue izinkinga ezivamile, amaphutha kanye nokuhlaziya
Ukucindezela okunganele
Izidingo zamandla e-thrust ye-0603 capacitor yi-1.0kg, ukumelana ngu-1.5kg, amandla okucindezela kwe-0805 capacitor ngu-1.5kg, kanti ukumelana ngu-2.0kg.
Ngokuvamile kubangelwa izizathu ezilandelayo:
1. Iglue enganele.
2. Akukho 100% ukuqina kwe-colloid.
3. Amabhodi e-PCB noma izingxenye zingcolile.
4. I-colloid ngokwayo i-crispy futhi ayinawo amandla.
I-Tentile ayizinzile
Iglue yesirinji engu-30ml idinga ukushaywa ukucindezela izikhathi ezingamashumi ezinkulungwane ukuze iqedwe, ngakho-ke kuyadingeka ukuthi ibe nokuthinta okuhle kakhulu ngokwayo, ngaphandle kwalokho izobangela amaphuzu eglue angazinzile kanye neglue encane. Lapho i-welding, ingxenye iyawa. Ngokuphambene nalokho, i-glue ngokweqile, ikakhulukazi ezingxenyeni ezincane, kulula ukunamathela ku-pad, ivimbela uxhumano lukagesi.
Indawo enganele noma yokuvuza
Izizathu nezinyathelo zokuphikisa:
1. Ibhodi lenetha lokunyathelisa aliwashwa njalo, futhi i-ethanol kufanele iwashwe njalo ngemva kwamahora angu-8.
2. I-colloid inokungcola.
3. Ukuvulwa kwe-mesh akunangqondo noma kuncane kakhulu noma ukucindezela kwegesi yeglue kuncane kakhulu.
4. Kunamabhamuza ku-colloid.
5. Xhuma ikhanda ukuze uvimbele, futhi ngokushesha uhlanze umlomo wenjoloba.
6. Ukushisa kwangaphambi kokushisa kwephuzu le-tape akwanele, futhi izinga lokushisa likampompi kufanele libekwe ku-38 ° C.
Ibhulashi
Okubizwa ngokuthi i-brushed ukuthi i-patch ayiphukile lapho i-dicture, futhi i-patch ixhunywe ku-dot-headed direction. Kukhona izintambo eziningi, futhi i-patch glue ihlanganiswe ephepheni eliphrintiwe, elizobangela ukushisela okubi. Ikakhulukazi uma ubukhulu bukhulu, lesi simo cishe kungenzeka uma usebenzisa umlomo wakho. Ukumiswa kwamabhulashi eglue ocezu kuthinteka kakhulu amabhulashi e-resin yesithako sawo kanye nezilungiselelo zezimo zokumboza amaphuzu:
1. Khulisa ukushaywa kwamagagasi ukuze unciphise isivinini sokunyakaza, kodwa kuzonciphisa indali yakho yokukhiqiza.
2. I-viscosity ephansi ephansi, i-high-touch material, encane ukuthambekela komdwebo, ngakho-ke zama ukukhetha lolu hlobo lwe-tape.
3. Khulisa kancane izinga lokushisa lomlawuli oshisayo, futhi ulilungise ku-viscosity ephansi, i-high-touch kanye ne-degeneration patch glue. Ngalesi sikhathi, isikhathi sokugcina se-patch glue kanye nokucindezela kwekhanda lompompi kufanele kucatshangelwe.
Goqa
I-liquidity ye-patch glue ibangela ukuwa. Inkinga evamile yokuwa ukuthi izobangela ukuwa ngemva kokubekwa isikhathi eside. Uma i-patch glue inwetshwa kuphedi ebhodini lesifunda eliphrintiwe, lizobangela ukushisela okubi. Futhi kulezo zingxenye ezinezikhonkwane eziphakeme kakhulu, azikwazi ukuxhumana nomzimba oyinhloko wengxenye, okuzobangela ukunamathela okwanele. Ngakho-ke, kulula ukuwa. Kubikezelwa, ngakho-ke ukusetha kokuqala kokumbozwa kwephuzu nakho kunzima. Ekuphenduleni lokhu, kwadingeka sikhethe labo okwakungelula ukudilika. Ngokuwa okubangelwa amachashazi isikhathi eside kakhulu, singasebenzisa ingcina ye-patch kanye nokuqina ngesikhathi esifushane ukuze sigweme.
Ingxenye ye-offset
I-component offset yinto embi ethambekele emishinini yokuchibiyela enesivinini esikhulu. Isizathu esiyinhloko yilesi:
1. I-offset ekhiqizwa isiqondiso se-XY lapho ibhodi eliphrintiwe lihamba ngesivinini esikhulu. Lesi simo sivame ukwenzeka engxenyeni enendawo encane yokunamathisela iglue. Isizathu sibangelwa ukunamathela.
2. Ayihambisani nenani leglue ngaphansi kwengxenye (isibonelo: amaphuzu we-glue angu-2 ngaphansi kwe-IC, iphuzu leglue likhulu kanye nephuzu elincane leglue). Lapho i-glue ishisa futhi iqinisiwe, amandla awalingani, futhi umkhawulo owodwa ngenani elincane leglue kulula ukuqeda.
Welding ingxenye phezulu
Isizathu siyinkimbinkimbi kakhulu:
1. Ukunamathela okunganele kwe-patch glue.
2. Ngaphambi kokushiselwa kwamagagasi, kwakushaywa ngaphambi kokushiselwa.
3. Kukhona izinsalela eziningi kwezinye izingxenye.
4. Umthelela wokushisa ophezulu we-colloidity awumelani nokushisa okuphezulu
I-patch glue ehlanganisiwe
Abakhiqizi abahlukene bahluke kakhulu ekubunjweni kwamakhemikhali. Ukusetshenziswa okuxubile kujwayele ukudala okubi kakhulu: 1. Ubunzima obulungisiwe; 2. Ukunamathela okunganele; 3. Izingxenye ezishiselwe kakhulu phezulu.
Isixazululo siwukuthi: ukuhlanza kahle i-mesh, i-scraper, nekhanda elinekhanda eliqondile, okulula ukubangela ukusetshenziswa okuxubile ukugwema ukuxuba ukusetshenziswa kwezinhlobo ezahlukene ze-patch glue.
Isikhathi sokuthumela: Jun-19-2023
