Kodi Silicone Conformal Coating Kwa PCB Ndi Chiyani?

Zozungulira zamagetsi zimatha kuonongeka ndi dzimbiri ngati pali kusanjikiza kosalekeza kwamadzi. Ma ion ochepa osungunuka ndizomwe zimafunika kuti ma electrochemical reaction ayambe, kuwononga zitsulo pa bolodi kapena kupanga kutulutsa kwamagetsi pakati pa ma conductor. Kutalikitsa moyo wamagetsi, zokutira zoteteza ndizofunikira. Zovala za silicone conformal ndi ena mwa othandiza kwambiri popereka chitetezo chofunikira kwambiri.

Silicone imagwira ntchito pamafakitale ndi zochitika chifukwa cha kudalirika kwake komanso zopindulitsa. Ngati mwakhala mukuyang'ana chitetezo chabwino kwambiri cha board board, silicone conformal coating ndichomwe muyenera kuganizira.

The katundu 

Kumamatira kwabwino komanso kunyowa ndikofunikira mukamayang'ana chitetezo pamazungulira apansi ndi zitsulo. Silicone yochiritsidwa imapereka chitetezo chofunikira pama module ndi zida zamagetsi chifukwa imachotsa madzi. Ngakhale nthunzi wamadzi pamagwiritsidwe onyowa amatha kulowa m'mawonekedwe anu, palibe zoyipa zomwe zingachitike pamene zokutira za silicone zili m'malo. Kumamatira kwa silicone kwabwino kumachotsa mipata yomwe imalola kuti madzi asungunuke. Zomwe zimapangitsa kuti zokutira za silicone zikhale zotchuka ndizo:

• Kutsutsa konyowa
• Chitetezo champhamvu
• Mandala ndi otsika kawopsedwe
• Kuchita bwino kwambiri kwa kutentha kwambiri
• Kugwiritsa ntchito kosavuta
• Kukhazikika kwamankhwala ochititsa chidwi, kuphatikiza kuwonongeka kwa ozone ndi UV
• Kuwala kufala luso

Ubwino wake 

Zokutira conformal Zomwe zimapangidwa ndi silicone zimakonda kukhala zosamva kuphulika, zofewa, kapena zolimba, kutengera kapangidwe kake. Mupeza zokutira zolimba, zotengera zosungunulira, zolimba zomwe zimafunikira kutentha, UV, kapena chinyezi kuti muchiritse. Kuchotsa zokutira kumafuna ma strippers a mankhwala, koma ubwino wa zokutira zopangidwa kuchokera ku silikoni ndi zotani?

Kukhazikika kosiyanasiyana kwa kutentha. Silicone imadziwika kwambiri ndikusankhidwa chifukwa cha zabwino zake. Mfundo yakuti imatha kupirira kutentha kwambiri ngakhale panthawi yoyendetsa njinga yamoto imapangitsa kuti ikhale yodalirika kwambiri. Mitunduyi imachokera ku -40 madigiri kufika pafupifupi 200 digiri Celsius, yomwe ndi yochititsa chidwi kwambiri poyerekeza ndi mitundu ina yokutira.

Kusinthasintha. Kusinthasintha kwa zokutira za silicone kumapangitsa kukhala koyenera kupereka chitetezo komanso kunyowetsa. Zinthuzo ndizowonjezera ndipo zimagwirizana mosavuta ngati zikufunika pamagwiritsidwe osiyanasiyana.

Mphamvu zotsika pamwamba. Mphamvu yotsika pamwamba ndiyofunikira pakunyowetsa bwino. Uwu ndi mwayi womwe mumasangalala nawo mukasankha zokutira za silicone.

Kukana chinyezi kwapadera. Mukachita bwino, simudzasowa kudandaula za kuwonongeka kwa chinyezi chifukwa zokutira kumapereka dzimbiri lodalirika komanso kukana chinyezi.

Mphamvu yapamwamba ya dielectric. Izi zikutanthauza kuti zinthuzo zimalimbana ndi minda yamagetsi yapamwamba popanda njira zoyendetsera. Imatetezanso zidazo ku akabudula amagetsi, kutulutsa kosasunthika, ndi ma arcing apamwamba kwambiri.

Kugwiritsa ntchito 

Mu zokutira conformal, njira zosiyanasiyana ntchito ntchito. Kwa zokutira za silicone, zomwe zimagwiritsidwa ntchito kwambiri ndi:

Kuviika kungakhale pamanja kapena makina. Njirayi imagwiritsa ntchito mikono ya robotiki kuti igwire zidazo, kuzitsitsa ndikuviika mu thanki yodzaza ndi silicone. Kuviika kulikonse kumapereka makulidwe osasinthika, ndipo njirayo ndi yoyenera kwambiri pazopanga zapamwamba kwambiri.

Kupopera mbewu mankhwalawa ndi njira ina yogwiritsira ntchito yomwe mungagwiritse ntchito ndi zokutira za silicone. Mutha kugwiritsa ntchito mfuti yopopera kapena aerosol popaka, ndipo ndi njira yoyenera ma voliyumu akulu chifukwa ndi yachangu komanso yosavuta kubwereza.

Mukhozanso kugwiritsa ntchito brushing kuti mugwiritse ntchito zokutira za silicone. Wogwira ntchitoyo amatsuka zokutira ndikuzilola kuti ziziyenda pamwamba pa bolodi. Njira iyi imagwirizana ndi kukonzanso, komanso kuthamanga kwamphamvu.

Kuti mudziwe zambiri ndi silicone conformal zokutira kwa pcb, mutha kupita ku DeepMaterial pa https://www.epoxyadhesiveglue.com/what-is-silicone-conformal-coating-for-electronics-pcb-circuit-board-protection/ chifukwa Dziwani zambiri.