Kufanana ndi Kusiyana Pakati pa UV ndi EB Ink Curing

Kuchiritsa kwa UV (ultraviolet) ndi EB (electron beam) zonse zimagwiritsa ntchito ma electromagnetic radiation, omwe ndi osiyana ndi kuchiritsa kwa kutentha kwa IR (infrared). Ngakhale kuti UV (Ultra Violet) ndi EB (Electron Beam) zili ndi ma wavelength osiyanasiyana, zonsezi zimatha kuyambitsa kuyanjana kwa mankhwala mu zowunikira za inki, mwachitsanzo, kulumikiza kwa mamolekyulu ambiri, zomwe zimapangitsa kuti inki iwonongeke nthawi yomweyo.

Mosiyana ndi zimenezi, kuchiritsa kwa IR kumagwira ntchito potenthetsa inki, zomwe zimapangitsa kuti pakhale zotsatira zosiyanasiyana:

● Kutuluka kwa nthunzi pang'ono kwa chosungunulira kapena chinyezi,

● Kufewetsa kwa inki ndi kuchuluka kwa madzi, zomwe zimathandiza kuyamwa ndi kuuma,

● Kusungunuka kwa pamwamba komwe kumachitika chifukwa cha kutentha ndi kukhudzana ndi mpweya,

● Kuthira pang'ono utomoni ndi mafuta okhala ndi mamolekyulu ambiri pakatentha.

Izi zimapangitsa kuti kuyeretsa kwa IR kukhale njira yowumitsa yokhala ndi mbali zambiri komanso pang'ono, osati njira imodzi yokha yowumitsa. Inki zochokera ku zosungunulira zimasiyananso, chifukwa kuyeretsa kwawo kumachitika 100% chifukwa cha kusungunuka kwa solvent mothandizidwa ndi mpweya.

Kusiyana Pakati pa Kuchiritsa kwa UV ndi EB

Kuthira kwa UV kumasiyana ndi kuthira kwa EB makamaka pa kuya kwa kulowa. Ma radiation a UV amalowa pang'ono; mwachitsanzo, wosanjikiza wa inki wa 4–5 µm wokuta umafuna kuthira pang'onopang'ono ndi kuwala kwa UV kwamphamvu kwambiri. Sizingachiritsidwe pa liwiro lalikulu, monga mapepala 12,000–15,000 pa ola limodzi mu kusindikiza kwa offset. Kupanda kutero, pamwamba pake pakhoza kuchira pomwe wosanjikiza wamkati umakhalabe wamadzimadzi—monga dzira losaphikidwa bwino—zomwe zingayambitse kuti pamwamba pake pasungunukenso ndikumamatira.

Kulowa kwa UV kumasiyananso kwambiri kutengera mtundu wa inki. Inki za Magenta ndi Cyan zimalowa mosavuta, koma inki za Yellow ndi Black zimayamwa UV wambiri, ndipo inki yoyera imayamwa UV wambiri. Chifukwa chake, dongosolo la mitundu yosindikizira limakhudza kwambiri kuuma kwa UV. Ngati inki zakuda kapena zachikasu zokhala ndi UV wambiri zili pamwamba, inki zofiira kapena zabuluu zomwe zili pansi pake sizingachiritsidwe mokwanira. Mosiyana ndi zimenezi, kuyika inki zofiira kapena zabuluu pamwamba ndi zachikasu kapena zakuda pansi kumawonjezera mwayi woti zichiritsidwe kwathunthu. Kupanda kutero, mtundu uliwonse ungafunike kuuma kosiyana.

Kumbali ina, EB curing ilibe kusiyana kotengera mtundu wa kuchiritsa ndipo imalowa mwamphamvu kwambiri. Imatha kulowa m'mapepala, pulasitiki, ndi zinthu zina, komanso kuchiritsa mbali zonse ziwiri za chosindikizira nthawi imodzi.

Zinthu Zapadera Zoganizira

Inki yoyera pansi pa UV ndi yovuta kwambiri chifukwa imawonetsa kuwala kwa UV, koma kuyeretsa kwa EB sikukhudzidwa ndi izi. Uwu ndi ubwino umodzi wa EB kuposa UV.

Komabe, kuchiritsa kwa EB kumafuna kuti pamwamba pake pakhale malo opanda mpweya kuti pakhale kuchiritsa kokwanira. Mosiyana ndi UV, yomwe imatha kuchiritsa mumlengalenga, EB iyenera kuwonjezera mphamvu kupitirira kakhumi mumlengalenga kuti ikwaniritse zotsatira zofanana - ntchito yoopsa kwambiri yomwe imafuna njira zodzitetezera mwamphamvu. Yankho lothandiza ndikudzaza chipinda chochiritsa ndi nayitrogeni kuti muchotse mpweya ndikuchepetsa kusokoneza, zomwe zimapangitsa kuti kuchiritsa kukhale kogwira mtima kwambiri.

Ndipotu, m'mafakitale opanga zinthu zamagetsi, kujambula ndi kuwonetsa kuwala kwa UV nthawi zambiri kumachitika m'zipinda zodzaza ndi nayitrogeni, zopanda mpweya pachifukwa chomwecho.

Chifukwa chake, EB curing ndi yoyenera mapepala opyapyala kapena mafilimu apulasitiki okha omwe amagwiritsidwa ntchito popaka ndi kusindikiza. Sikoyenera makina osindikizira omwe amathiridwa ndi mapepala okhala ndi unyolo wamakina ndi ma gripper. Mosiyana ndi zimenezi, UV curing imatha kugwiritsidwa ntchito mumlengalenga ndipo ndi yothandiza kwambiri, ngakhale kuti UV curing yopanda mpweya siigwiritsidwa ntchito kawirikawiri posindikiza kapena popaka masiku ano.