Kuvharika kwemaburi eSMT stencil kakawanda zvichikonzera kudzikira kukuru kwegoho? Kusarudza machira ekuchenesa estencil akakodzera kwakakosha.

Mukugadzirisa PCB pamusoro pechinhu, pepa rekupukuta restencil ipepa rakachena rinoshandiswa kakawanda pakudhinda, asi chinhu chinokanganisa goho rinowanzo tariswa. Pepa rekupukuta re single-layer riri pamusika harina simba rakakwana rekubatanidza fiber; kana rakanyikwa muIPA cleaning solution kuti ribvise solder paste residues kubva pasi pestencil, rinowanzo bvisa zvidimbu zvidiki zvefiber. Aya mafibers akanaka kwazvo anogona kugara mukati memaburi estencils akapfava, zvichikonzera maburi akavharika mushure mekugadzirwa kwenguva refu. Izvi zvinoguma nezvikanganiso zvakaita sekushaya kukwana kwesolder, bridgeging uye solder balls. Kumira kwekugadzira stencil kakawanda kunoderedza kushanda kwese kwemuchina uye kunowedzera mari yekambani yezvinhu zvinoshandiswa uye vashandi.
Tichigadzirisa dambudziko riri muindasitiri rese rekubviswa kwefiber uye kuvharika kwestencil, bepa redu re spunlace stencil rekuchenesa rine chimiro chakagadziridzwa, richipa mabhenefiti akawanda anoshanda:

Chimiro chakagadzirwa ne spunlace chine mativi maviri, chakaumbwa sechinhu chimwe chete chisina kunamira zvakanyanya;

Iine guruva shoma uye isina jira, ine faibha shoma panguva yekupukuta;

Chimiro chine maburi chinopinza mvura zvakanyanya uye chinokwanisa kubata tsvina, chichinyatsobata mabaki emvura inonyungudika uye inoyerera;

Inowanikwa muhupamhi hwakasiyana-siyana, ine saizi dzepakati dzinogoneka kugadziriswa kuti dzikwane maprinta akajairika akagadzirwa otomatiki akadai seDEK neMPM;

Kuenderana kwakanaka kwemakemikari; haisvibisi kana kubvisa tsvina kunyangwe kana yakabatana kwenguva refu neIPA nezvimwe zvinonyungudutsa zvekuchenesa.

Hunhu hushoma hweguruva uye husina lint ndihwo hunhu hukuru hunosiyanisa bepa rekupukuta reSMT remhando yepamusoro kubva kuzvigadzirwa zvemazuva ese. Chigadzirwa ichi chinoshandisa filament polyester pamwe chete ne spunlace entanglement process uchishandisa virgin wood pulp, pasina kushandisa makemikari anonamira, zvichiita kuti fibers dzirambe dzakasungwa zvakasimba mumamiriro akaoma uye akanyorova. Pakupukuta mastencil, hapana lint kana marara anogadzirwa; fine tin residues uye flux powder zvinovharirwa mukati memukati mepepa, zvichidzivirira marara kuti asarambe ari mumaburi estencil kana kupararira mu cleanroom yese. Yakakodzera mitsetse yekugadzira yeClass 1,000 neClass 10,000 cleanroom SMT, inoderedza zvikanganiso zvekuiswa kwestencil zvinokonzerwa nemarara emapepa, inoderedza nguva yekushaikwa kwekuchenesa, uye inodzikamisa mwero wegoho rekugadzira.

Bepa iri risina guruva rinoshandiswa zvakanyanya mumitsetse yekugadzira michina yemagetsi inoshandiswa nevatengi, mabhodhi matsva emagetsi uye kuiswa kwemachipisi chaiwo. Rakakodzera kupukuta nemaoko kwehafu-otomatiki uye kupukuta kunoramba kuchienderera mberi, kunodzokororwa pamichina yekudhinda otomatiki. Mhinduro dzakagadzirwa nemasaizi akasiyana-siyana dzinogona kugadzirwa kuti dzienderane nemidziyo iripo yekambani, zvichibvisa kudiwa kwekutsiva mamodheru emuchina, zvinodyiwa kana zvimwe; chinhu chinodzivirira solvent hachibviswi, chinopa simba rekuchenesa rakanyanya pakubvisa kwega kwega uye chinoderedza kuwanda kwezvinotsiva zvinodyiwa kwenguva refu.

Kune vagadziri veSMT, bepa rekupukuta rinoita serisina kushamisa rine simba guru pakuiswa kwaro. Kusarudza bepa rekupukuta rine guruva shoma uye rinonyudza zvakanyanya rinogona kuderedza dambudziko rekuvharika kwemaburi estencil panzvimbo inobva pepa, nokudaro richitsigira kucheneswa kwakajairika muworkshop.