Maitiro ekushandisa solder paste muPCBA process?
(1) Nzira iri nyore yekutonga viscosity ye solder paste: Gadzirisa solder paste ne spatula kweanenge 2-5 maminetsi, tora zvishoma solder paste ne spatula, uye rega solder paste iwire pasi zvakasikwa.Iyo viscosity ine mwero;kana iyo solder paste isingazununguki zvachose, viscosity ye solder paste yakanyanya;kana iyo solder paste ikaramba ichidonha nekukurumidza, viscosity ye solder paste idiki kwazvo;
(2) Mamiriro ekuchengetedza epaste paste: refrigerate mune yakavharwa fomu pane tembiricha ye0 ° C kusvika 10 ° C, uye nguva yekuchengetedza kazhinji mwedzi 3 kusvika 6;
3Iyo nzira yekudziya haigone kushandiswa kudzoka kune tembiricha;mushure mokunge solder paste ichidziyirwa, inoda kukurudzirwa (zvakadai sekusanganiswa nemushini, kusveta 1-2 Maminitsi, kubvongodza nemaoko kunoda kukurudzirwa kwemaminitsi anopfuura maviri) vasati vashandisa;
(4) Tembiricha ye ambient ye solder paste printing inofanira kuva 22℃～28℃, uye hunyoro hunofanira kuva pasi pe65%;
(5) Solder paste kudhinda
1. Paunenge uchidhinda solder paste, zvinokurudzirwa kushandisa solder paste ine metal content ye85% kusvika 92% uye hupenyu hwebasa hwemaawa anopfuura 4;
2. Kudhinda kukurumidza Panguva yekudhinda, kufamba kwekufambisa kwe squeegee pa template yekudhinda kunokosha zvikuru, nokuti solder paste inoda nguva yekuputira uye kuyerera mugomba rekufa.Mhedzisiro yacho iri nani kana solder paste ichitenderera zvakaenzana pane stencil.
3. Kudhinda kudhindwa Kudhindwa kwekudhinda kunofanira kuenzaniswa nekuoma kwe squeegee.Kana kudzvinyirira kwakanyanya kuderera, iyo squeegee haizochenese solder paste pane template.Kana dzvinyiriro yakanyanyisa kana kuti squeegee yakanyanya kupfava, iyo squeegee ichanyura kune template.Chera paste ye solder kubva mugomba guru.Iyo empirical formula yekumanikidza: Shandisa scraper pane simbi template.Kuti uwane kumanikidzwa kwakaringana, tanga nekushandisa 1 kg yekumanikidza kune yega yega 50 mm yehurefu hwe scraper.Semuenzaniso, 300 mm scraper inoshandisa kumanikidzwa kwe6 kg kuti zvishoma nezvishoma kuderedza kudzvinyirira.Kusvikira solder paste atanga kuramba ari template uye haana kukweshwa zvakachena, ipapo zvishoma nezvishoma kuwedzera kumanikidzwa kusvikira solder paste ichangobva scratched kure.Panguva ino, kumanikidzwa kuri nani.
4. Process management system uye process mirau Kuti uwane mibairo yakanaka yekudhinda, zvinodikanwa kuve neiyo chaiyo solder paste zvinhu (viscosity, simbi yemukati, yakakura saizi yehupfu uye yakaderera inogoneka flux chiitiko), maturusi akakodzera (muchina wekudhinda, template. uye Kusanganiswa kwescraper) uye nzira chaiyo (yakanaka chinzvimbo, kuchenesa nekupukuta).Zvinoenderana neyakasiyana zvigadzirwa, isa inopindirana yekudhinda maitiro parameters muchirongwa chekudhinda, senge tembiricha yekushanda, kudzvanywa kwekushanda, squeegee kumhanya, kukurumidza kukurumidza, otomatiki template yekuchenesa kutenderera, etc. Panguva imwecheteyo, zvakakosha kugadzira nzira yakasimba. manejimendi system uye process mirau.
① Shandisa solder paste mukati menguva yechokwadi zvinoenderana nerudzi rwakasarudzwa.Iyo solder paste inofanira kuchengetwa mufiriji mukati mevhiki.Inofanira kuiswa panzvimbo yekushisa kwemaawa anopfuura mana isati yashandiswa, uye ipapo chivharo chinogona kuvhurwa kuti chishandiswe.Iyo inoshandiswa solder paste inofanira kuiswa chisimbiso uye kuchengetwa zvakasiyana.Kana kunaka kwacho kuchikodzera.
② Isati yagadzirwa, mushandisi anoshandisa simbi isina simbi inosimudzira banga kukwenya solder paste kuti ienzane.
③ Mushure mekuongorora kwekutanga kudhinda kana kugadziridzwa kwemidziyo pabasa, solder paste ukobvu tester ichashandiswa kuyera ukobvu hwekudhinda kwesolder paste.Iwo mapoinzi ebvunzo anosarudzwa pamapoinzi mashanu pabvunzo pamusoro pebhodhi rakadhindwa, kusanganisira kumusoro nepasi, kuruboshwe uye kurudyi nepakati mapoinzi, uye nyora kukosha.Ukobvu hweiyo solder paste inotangira -10% kusvika +15% yehukuru hwetemplate.
④ Panguva yekugadzira, 100% yekuongorora inoitwa pamhando yekudhinda yesolder paste.Chinhu chikuru ndechekuti solder paste patani yakakwana, kana ukobvu hwakafanana, uye kana paine solder paste tipping.
⑤ Chenesa template zvinoenderana nezvinodiwa nemaitiro mushure mekunge basa rebasa rapera.
⑥ Mushure mekuedza kwekudhinda kana kutadza kudhinda, solder paste pabhodhi rakadhindwa inofanira kunyatsocheneswa ne ultrasonic midziyo yekuchenesa uye yakaomeswa, kana kucheneswa nedoro uye gasi rinodzvinyirira zvakanyanya kudzivirira solder paste pabhodhi kubva pakukonzeresa. kushandiswa zvakare.Solder mabhora uye zvimwe zviitiko mushure me reflow soldering
NeoDen inopa yakazara SMT mutsetse mhinduro, kusanganisira SMT reflow oven, wave soldering muchina, pick nekuisa muchina, solder paste printer, PCB loader, PCB unloader, chip mounter, SMT AOI muchina, SMT SPI muchina, SMT X-Ray muchina, SMT dhizaini yemutsetse midziyo, PCB yekugadzira Equipment SMT spare parts, etc chero mhando dzeSMT michina yaungade, ndapota taura nesu kuti uwane rumwe ruzivo:
Iyo kambani Hangzhou NeoDen Technology Co., Ltd
Nguva yekutumira: Jul-21-2020