Indlela Yokuphulukisa I-UV Ye-LED Isebenza Kanjani Ku-Sheetfed Offset Press

Ukuphulukiswa kwe-UV ye-LED kumshini wokushicilela kusebenza ngokusebenzisa ama-Light Emitting Diode (ama-LED) anamandla kakhulu ukuqhumisa inki emanzi ngama-wavelengths athile wokukhanya kwe-ultraviolet, okubangela ukusabela kwamakhemikhali okusheshayo okubizwa ngokuthi i-polymerization. Ngokungafani nezindlela zendabuko zokomisa ezithembele ekushiseni noma ekuhwamukeni, le nqubo ngokushesha iguqula inkinobho ewuketshezi ibe yi-polymer eqinile, ehlala isikhathi eside lapho ishidi lidlula ngaphansi kwesibani. Lokhu kuvumela amashidi aphrintiwe ukuthi ahlanganiswe, asikwe, noma aqedwe ngokushesha ngaphandle kwengozi yokumaka noma ukusetha, ukusheshisa kakhulu ukukhiqizwa nokuvumela ukuphrinta kuma-substrates angewona ama-porous njengamapulasitiki nama-foil ensimbi.

Inqubo ye-Photochemical: Kusuka ku-Liquid kuya ku-Solid

Ukuze siqonde i-mechanics, kufanele sibheke amakhemikhali ephepheni. Ama-inki ajwayelekile we-offset owomile ngokumunca ephepheni futhi ahlanganise amahora amaningi. Ama-inki we-UV we-LED ahlukile.

Lapho ishidi lidlula ngaphansi kwe-LED array (imvamisa ifakwe ekugcineni kokucindezela noma phakathi kwamayunithi), ama-chips e-LED akhipha umkhawulokudonsa omncane wokukhanya kwe-UV-imvamisa i-385nm noma i-395nm. La mandla athile okukhanya angena kwifilimu kayinki futhi ashaye ama-photoinitiators.

Lawa ma-photoinitiators angamakhemikhali angaphakathi kweyinki. Lapho benikwe amandla ukukhanya kwe-UV, baqala ukusabela kochungechunge oluxhumanisa ama-oligomers nama-monomers ku-inki. Umphumela ukuphulukiswa okusheshayo.

Kungani i-Wavelength Matters

Ukusebenza kahle kwale nqubo kuncike ngokuphelele ekufaniseni umthombo wokukhanya noyinki. Ngenkathi izibani ze-mercury zendabuko zikhipha ukukhanya okubanzi (okuningi okuchithwa njengokushisa), i-UV ye-LED igxila kuwo wonke amandla ayo kubude obuthile obuvula inki.

Uyini umehluko phakathi kwe-UV ejwayelekile ne-UV ye-LED?

Umehluko oyinhloko utholakala emthonjeni wokukhanya nokushisa okukhiqizwayo. Ukuphulukiswa okujwayelekile kwe-UV kusebenzisa izibani ze-mercury-vapor. Ngenkathi zisebenza, lezi zibani zikhiqiza inani elikhulu lokushisa ne-ozone, ezidinga izinhlelo zokukhipha ezibizayo futhi zibeka engcupheni ama-substrates azwela ukushisa.

I-UV ye-LED isusa ukulinganisa kokushisa. Ngoba ama-LED avula futhi avale ngokushesha futhi akhipha ukushisa okuncane kakhulu kwe-infrared, umshini ugijima upholile. Yingakho UV LED Curing for Offset Printing isibe indinganiso yamaphrinta afuna ukusebenza ngezinto ezizwela ukushisa njengamafilimu amancane okwenziwa noma ama-vinyls ama-static-cling ngaphandle kokuhlanekezela.

Ukuqhathanisa: I-UV ye-LED vs. I-UV ejwayelekile

Ingabe ukuphrinta kwe-UV ye-LED kudinga inki ekhethekile?

Yebo, awukwazi ukusebenzisa ama-inki ajwayelekile asuselwa kuwoyela ngohlelo lwe-UV lwe-LED. Kufanele usebenzise ama-inks akhiwe ngokukhethekile ngama-photoinitiators aklanyelwe ukusabela kubude obuthile be-LED chips (imvamisa i-385nm-395nm).

Ukusebenzisa inkinobho engalungile kuzoholela "ekubambeni" (lapho inki ihlala inamathela) noma ukuphulukisa okungaphelele ngokujulile kwifilimu yeyinki. Ngokuthakazelisayo, isayensi yokufanisa inki nokuzwela kokukhanya iyindawo yonke kuzo zonke izindlela zokuphrinta. Kufana Indlela UV LED Ukwelapha Isebenza Inkjet Ukunyathelisa, opharetha offset kumele uqinisekise uchungechunge lwabo inkinobho iyahambisana ngokuqinile nokukhishwa isibani sabo ukufeza ukunamathela efanele futhi scratch ukumelana.

Ingabe i-LED UV yokuphulukisa amandla asebenza kahle?

Impela. Omunye wabashayeli abakhulu bokushicilela amashidi okushintshela ku-LED izindleko zamandla. Ama-LED arrays asebenzisa amandla amancane kakhulu kunezibani ze-mercury ngoba "zivuliwe" kuphela lapho ishidi lidlula ngaphansi kwazo.

• Ukuvula / ukucima okusheshayo: Izibani ezijwayelekile kufanele zisebenze njalo ngesikhathi sokushintsha ukugwema izikhathi ezinde zokufudumala. Ama-arrays e-LED angasuswa phakathi kwemisebenzi noma ngisho naphakathi kwamashidi ngabanye uma kunesidingo.
• Ukuphulukiswa Kwendawo: Izinhlelo eziningi ze-LED zikuvumela ukuthi uvale izingxenye zebha yokukhanya uma uphrinta usayizi weshidi elincane, ukonga amandla ngokwengeziwe.

Izinzuzo ze-Sheetfed Workflow

Ngaphandle nje "ukomisa inki," i-UV ye-LED ishintsha ukusebenza kokusebenza kwegumbi lokucindezela.

• Ayikho i-Spray Powder: I-offset ejwayelekile idinga i-anti-set-off powder ukugcina amashidi omanzi anganamatheli ndawonye enqwabeni yokulethwa. Amashidi we-LED aphulukisiwe e-UV owomile ngokushesha, aqede isidingo se-powder. Lokhu kugcina igumbi lokucindezela lihlanzekile futhi ukuqeda kubushelelezi.
• Ukuguqulwa okusheshayo: Ngoba asikho isikhathi esomile noma sokulinda, ama-pallets angaya ngqo ku-guillotine noma kufolda.
• Ukuphakama kwenqwaba ephakeme: Ungabeka iphepha phezulu ngaphandle kokukhathazeka ngesisindo esibangela "ukuvimba" (amashidi anamathela ndawonye) ezansi kwesitaki.

Imibuzo Evame Ukubuzwa

Q: Ngingakwazi ukubuyisela kabusha umshini okhona we-sheetfed nge-LED UV?

A: Yebo, ukubuyekezwa kujwayelekile kakhulu. Ngoba amayunithi e-LED ahlangene futhi adinga ingqalasizinda encane yokupholisa nokupholisa kunezibani ze-mercury, zingafakwa kalula emishinini eminingi yaseHeidelberg, iKomori, noma iManroland.

Q: Zihlala isikhathi esingakanani izibani ze-UV ze-LED?

A: Ama-diode e-LED UV ngokuvamile ahlala ngaphezu kwamahora angama-20,000 okusebenza. Njengoba zivuliwe kuphela lapho ziphrinta, lokhu kungalingana neminyaka eminingi yokukhiqiza ngaphandle kokushintsha kwe-bulb.

Q: Ingabe ukuphulukiswa kwe-LED UV kuphephile?

A: Ngokuvamile, yebo. Ayikhiqizi i-ozone futhi iqeda izingozi zokuphatha i-mercury ezihambisana nezibani zendabuko. Kodwa-ke, opharetha kufanele bavikele amehlo nesikhumba sabo ekuchayekeni okuqondile ekukhanyeni kwe-UV.

Q: Ingabe i-UV ye-LED ithinta izinga lokucwebezela lokuphrinta?

A: I-UV ye-LED ivame ukubamba inki ebusweni bephepha kunokuba imvumele imuce, okuvame ukuholela ekucwebezeleni kwemvelo okuphezulu kanye nenzuzo yamachashazi abukhali uma kuqhathaniswa nama-inks ajwayelekile asuselwa kuwoyela.

Key Takeaways

• Ukuphulukisa okusheshayo: I-UV ye-LED isebenzisa ukukhanya okuncane kwe-spectrum ukwenza i-polymerize inki ngokushesha, okuvumela ukuqedwa okusheshayo.
• Ukuguquguquka kwezinto ezibonakalayo: Inqubo yokushisa okuphansi ivumela amashidi okucindezela ukuthi asebenzise amapulasitiki namafoyile abucayi ngokuphepha.
• Ukusebenza kahle kwamandla: Ama-LED anikeza ikhono "elisheshayo" kanye nokuphulukiswa kwendawo, ukunciphisa izikweletu zamandla kuze kufike ku-70% uma kuqhathaniswa nezibani ze-mercury.
• Ukuhambisana kwe-Ink: Ama-inki we-UV we-LED azinikezele ayadingeka; ama-inki ajwayelekile ngeke ome ngaphansi kwalezi zibani.

Isiphetho

Ukuqonda ukuthi ukuphulukiswa kwe-UV kwe-LED kusebenza kanjani kumshini wokushicilela kuveza ukuthi kungani kusheshe kube yindinganiso yomkhakha. Ngokushintsha ukushisa nokuhwamuka ngokuphendula okuqondile kwe-photochemical, amaphrinta athola isivinini, anciphise izindleko zamandla, futhi avule izimakethe ezintsha emaphaketheni nasekuphrintiweni kokwenziwa.

Uma ufuna ukuthuthukisa amakhono akho okucindezela, ukuhlola izidingo ezithile ze-wavelength nezidingo zokupholisa zemishini yakho kuyisinyathelo sokuqala.