Kutsekeka pafupipafupi kwa ma stencil a SMT komwe kumabweretsa kuchepa kwakukulu kwa mphamvu ya ntchito? Kusankha ma stencil cleaning wipes oyenera n'kofunika kwambiri.

Mu njira yopangira PCB pamwamba pa stencil, pepala lopukuta ndi loyera lomwe limagwiritsidwa ntchito nthawi zambiri pa malo osindikizira, komabe ndi chinthu chomwe chimakhudza phindu lomwe nthawi zambiri limanyalanyazidwa. Pepala lopukuta lokhala ndi layer imodzi lomwe likupezeka pamsika silikhala ndi mphamvu zokwanira zomangira ulusi; likaviikidwa mu yankho loyeretsera la IPA kuti lichotse zotsalira za solder paste pansi pa stencil, limakhala ndi chiopsezo chachikulu chotaya tinthu tating'onoting'ono ta ulusi. Ulusi wopyapyala kwambiriwu ukhoza kukhala mkati mwa mabowo a ma stencil opyapyala, zomwe zimapangitsa kuti mabowo atsekeke pambuyo popanga nthawi yayitali. Izi zimapangitsa kuti pakhale zolakwika monga solder yosakwanira, bridging ndi solder balls. Kuyimitsidwa kawirikawiri kwa kupanga stencil kumachepetsa mphamvu yonse yopanga mzere ndikuwonjezera ndalama za kampani pazinthu zogwiritsidwa ntchito komanso ntchito.
Pothana ndi vuto la kutayika kwa ulusi ndi kutsekeka kwa ma stencil m'makampani onse, pepala lathu lapadera la spunlace stencil lili ndi kapangidwe kabwino ka substrate, komwe kamapereka zabwino zambiri zothandiza:

Kapangidwe ka spunlace kamene kali ndi zigawo ziwiri, kopangidwa ngati chidutswa chimodzi popanda guluu wochulukirapo;

Yopanda fumbi komanso yopanda utoto, yokhala ndi ulusi wochepa wotayikira panthawi yopukuta;

Kapangidwe kake kokhala ndi mabowo komwe kamapereka kuyamwa kwamadzimadzi mwamphamvu komanso kuthekera kosunga zinthu zodetsa, komwe kamayamwa bwino ma solder phala ndi zotsalira za flux;

Imapezeka m'lifupi mosiyanasiyana, yokhala ndi kukula kwapakati komwe kungasinthidwe kuti igwirizane ndi ma printers odziwika bwino monga DEK ndi MPM;

Kugwirizana bwino kwambiri ndi mankhwala; sikuwononga kapena kutulutsa zinyalala ngakhale mutakhudzana ndi IPA ndi zosungunulira zosiyanasiyana zoyeretsera.

Fumbi lochepa komanso lopanda lint ndi makhalidwe akuluakulu omwe amasiyanitsa pepala lopukuta la SMT labwino kwambiri ndi zinthu wamba. Chogulitsachi chimagwiritsa ntchito filament polyester pamodzi ndi njira yolumikizira spunlace pogwiritsa ntchito virgin wood pulp, popanda kugwiritsa ntchito zomatira za mankhwala, kuonetsetsa kuti ulusiwo umakhala womangika bwino nthawi zonse zouma komanso zonyowa. Mukapukuta ma stencil, palibe lint kapena zinyalala zomwe zimapangidwa; zotsalira zazing'ono za tin ndi flux powder zimatsekeredwa mkati mwa pores amkati mwa pepalalo, zomwe zimaletsa zinyalala kuti zisapitirire m'mabowo a stencil kapena kufalikira m'chipinda chotsukira. Choyenera mizere yopangira SMT ya Class 1,000 ndi Class 10,000, chimachepetsa zolakwika zoyikidwa chifukwa cha kutsekeka kwa stencil chifukwa cha zinyalala za mapepala, chimachepetsa nthawi yopuma yoyeretsera, ndikukhazikitsa kuchuluka kwa zokolola.

Pepala lopukutira lopanda fumbili limagwiritsidwa ntchito kwambiri popanga zinthu zamagetsi, ma board atsopano amagetsi komanso malo okonzera ma chip molondola. Ndiloyenera kupukutira pamanja kokhazikika komanso kopitilira, kobwerezabwereza pamakina osindikizira okha. Mayankho opangidwa mwamakonda osiyanasiyana amatha kupangidwa kuti agwirizane ndi zida zomwe zilipo pakampani, kuchotsa kufunikira kosintha mitundu ya makina, zinthu zogwiritsidwa ntchito kapena zowonjezera; zinthu zosungunulira sizing'ambika, zimapereka mphamvu yoyeretsera bwino pa chopukutira chilichonse ndikuchepetsa kuchuluka kwa zinthu zosinthidwa zomwe zimagwiritsidwa ntchito pakapita nthawi.

Kwa opanga ma SMT, pepala lopukutira la stencil lomwe limawoneka ngati losadabwitsa limakhudza mwachindunji kuchuluka kwa malo oyikamo. Kusankha pepala lopukutira la spunlace lokhala ndi fumbi lochepa komanso loyamwa kwambiri kungathandize kuchepetsa vuto la kutsekeka kwa ma pore a stencil komwe kumachokera, motero kumathandiza kuyang'anira ukhondo m'malo ogwirira ntchito.