Makina osindikizira a Solder paste ndi zida zofunika kutsogolo gawo la mzere wa SMT, makamaka pogwiritsa ntchito stencil kusindikiza phala la solder pa pad yotchulidwa, kusindikiza kwabwino kapena koipa kwa solder phala, kumakhudza mwachindunji khalidwe lomaliza la solder.Zotsatirazi kufotokoza luso chidziwitso cha makina osindikizira ndondomeko magawo zoikamo.
1. Kupanikizika kwa squeegee.
Kupanikizika kwa squeegee kuyenera kutengera zofunikira zenizeni zopangira.Kupanikizika ndi kochepa kwambiri, pangakhale zinthu ziwiri: squeegee mu njira yopititsira patsogolo mphamvu yotsika ndi yaying'ono, idzayambitsa kutayikira kwa kuchuluka kwa kusindikiza kosakwanira;chachiwiri, squeegee si pafupi pamwamba pa stencil, kusindikiza chifukwa cha kukhalapo kwa kusiyana kakang'ono pakati pa squeegee ndi PCB, kuwonjezera makulidwe osindikizira.Kuonjezera apo, kupanikizika kwa squeegee kumakhala kochepa kwambiri kumapangitsa kuti malo a stencil asiyane ndi phala la solder, mosavuta kuchititsa zithunzi kumamatira ndi zolakwika zina zosindikiza.M'malo mwake, kuthamanga kwa squeegee ndikokulirapo kungayambitse kusindikiza kwa solder phala kumakhala kocheperako, komanso kuwononga stencil.
2. Ngongole yopukusa.
Nthawi zambiri scraper angle ndi 45 ° ~ 60 °, phala la solder lomwe limagudubuza bwino.Kukula kwa ngodya ya scraper kumakhudza kukula kwa mphamvu yowongoka ya scraper pa phala la solder, kakang'ono kakang'ono, ndi mphamvu yowonjezereka.Posintha scraper angle akhoza kusintha kupanikizika kopangidwa ndi scraper.
3. Squeegee kuuma
Kuuma kwa squeegee kudzakhudzanso makulidwe a phala losindikizidwa la solder.Kupopera kofewa kwambiri kumapangitsa kuti phala lothira madzi lizimira, ndiye muyenera kugwiritsa ntchito chopondereza cholimba kwambiri kapena chofinyira chachitsulo, nthawi zambiri pogwiritsa ntchito chitsulo chosapanga dzimbiri.
4. Liwiro losindikiza
Liwiro losindikiza limayikidwa ku 15 ~ 100 mm / s.Ngati liwiro liri lochedwa kwambiri, solder phala mamasukidwe akayendedwe ndi lalikulu, si kophweka kuphonya kusindikiza, ndi zimakhudza kusindikiza Mwachangu.Liwiro ndilothamanga kwambiri, squeegee kupyolera mu nthawi yotsegulira template ndi yochepa kwambiri, phala la solder silingalowetsedwe potsegula, zosavuta kuchititsa phala la solder silidzadza kapena kutayika kwa zolakwika.
5. Kusindikiza kusiyana
Kusindikiza kumatanthauza mtunda pakati pa pansi pa stencil ndi pamwamba pa PCB, kusindikiza kwa stencil kungagawidwe kukhudzana ndi kusindikiza kosalumikizana ndi mitundu iwiri.Kusindikiza kwa stencil ndi kusiyana pakati pa PCB kumatchedwa kusindikiza kosalumikizana, kusiyana kwakukulu kwa 0 ~ 1.27mm, palibe njira yosindikizira yosindikiza yomwe imatchedwa kusindikiza.Kupatukana kwapaintaneti koyimirira kumatha kupangitsa kuti mtundu wosindikizirawo ukhale wocheperako wa Z, makamaka posindikiza phala la solder.Ngati makulidwe a stencil ndi oyenera, kusindikiza kolumikizana kumagwiritsidwa ntchito nthawi zambiri.
6. Kutulutsa liwiro
Pamene squeegee amaliza kusindikiza kusindikiza, kuthamanga kwanthawi yomweyo kwa stencil kuchoka pa PCB kumatchedwa liwiro la demoulding.Kusintha koyenera kwa liwiro lotulutsa, kotero kuti stencil ichoke pa PCB pakakhala njira yayifupi yokhazikika, kotero kuti phala la solder kuchokera pamitseko ya stencil imatulutsidwa kwathunthu (yodetsedwa), kuti mupeze Z yabwino kwambiri ya solder phala zithunzi.Liwiro lolekanitsa la PCB ndi stencil lidzakhudza kwambiri kusindikiza.Nthawi yochotsa ndi yayitali kwambiri, yosavuta mpaka pansi pa phala lotsalira la stencil;nthawi yowononga ndi yaifupi kwambiri, yosagwirizana ndi phala lowongoka, lomwe limakhudza kumveka kwake.
7. Stencil kuyeretsa pafupipafupi
Kuyeretsa stencil ndi chinthu chomwe chimatsimikizira kusindikiza kwapamwamba, kuyeretsa pansi pa stencil mu ndondomeko yosindikizira kuchotsa dothi pansi, zomwe zimathandiza kupewa kuipitsidwa kwa PCB.Kuyeretsa kumachitika ndi ethanol ya anhydrous monga njira yoyeretsera.Ngati pali phala lotsalira la solder pakutsegula kwa stencil isanapangidwe, iyenera kutsukidwa musanagwiritse ntchito, ndikuwonetsetsa kuti palibe njira yoyeretsera yotsalira, apo ayi zidzakhudza kutsekemera kwa phala la solder.Nthawi zambiri zimanenedwa kuti cholemberacho chiyenera kutsukidwa pamanja ndi pepala lopukutira mphindi 30 zilizonse, ndipo cholemberacho chiyenera kutsukidwa ndi akupanga ndi mowa pambuyo popanga kuti zitsimikizire kuti palibe phala lotsalira la solder potsegula.
Nthawi yotumiza: Dec-09-2021