Indlela Yokuthuthukisa Ukwelashwa Kwe-High Speed Web Printing

Ukuphrinta kwewebhu okusheshayo kuyisenzo sokulinganisa esibucayi. Cindezela isivinini sokucindezela esiphakeme kakhulu, futhi ubeka engcupheni inkinobho engaphansi kokuphulukiswa, imiqulu enamathelayo, namaqoqo anqatshiwe. Yigcine kancane kakhulu, futhi inzuzo yakho iyanyamalala. "Indawo emnandi" ayigcini nje ngejubane lomshini—imayelana ne-physics ye-polymerization. Uma ulwela ukugcina ukwelashwa okuqinile ku-1,000 + fpm (izinyawo ngomzuzu), i-bottleneck kungenzeka ukuthi akuyona umshini wakho, kepha ikhono lohlelo lwakho lokuphulukisa ukuletha amandla ngempumelelo kulelo windi lesibili eliqhekekile.

Ukwenza ngcono ukwelashwa emigqeni enejubane eliphakeme kudinga ukushintshwa kwesu—kusuka "ekuqhumeni ukushisa" kuya ekuphathweni kwamandla ngokunemba. Noma ngabe usebenzisa i-flexo yewebhu emincane yamalebula noma i-offset yevolumu ephezulu, ukuthuthukisa isilinganiso sakho sokwelapha kusho ukuqonda izinto ezintathu eziguquguqukayo: ukukhanya, isikhathi sokuhlala, nokuqhathanisa kwe-spectral.

Lo mhlahlandlela ucacisa kahle ukuthi ungazinzisa kanjani inqubo yakho yokuphulukisa, ukunciphisa imfucuza, futhi ukhuphule ngokuzethemba isivinini sakho sokucindezela usebenzisa ubuchwepheshe besimanje be-UV LED.

Kungani ukwelapha kunzima kangaka ngesivinini esiphezulu sewebhu?

Inselele:

Njengoba ijubane lokucindezela likhuphuka, isikhathi sokuhlala (isikhathi sikayinki esivezwa ekukhanyeni kwe-UV) siyancipha kakhulu. Uma "umthamo" (amandla aphelele alethwayo) ehla ngaphansi komkhawulo odingekayo we-polymerization, inki ihlala uketshezi noma i-tacky.

I-Physics yenkinga:

Ngesivinini esiphansi, unesikhathi sokunethezeka. Isibani esinamandla alinganiselayo ekugcineni singaphulukisa inki ngoba i-substrate idlula kancane ngaphansi kogongolo. Kodwa-ke, ngesivinini esiphezulu (isb., Ngaphezu kuka-500 fpm), lelo windi lokuchayeka liyancipha libe ngama-milliseconds.

Isitha esiyinhloko lapha ukuvimbela umoya-mpilo. I-oksijini emoyeni isebenzisana nama-radicals wamahhala ebusweni beyinki, ibavimbela ekuxhumaneni ukuze bakhe i-polymer eqinile. Ukuze unqobe lokhu ngesivinini esikhulu, awukwazi nje ukuthembela "isikhathi esithe xaxa"—udinga ukukhanya okuphezulu okuphezulu. Udinga uhlelo oluletha isibhakela esikhulu samandla ngokushesha ukushayela ukusabela ngefilimu ye-inki ngaphambi kokuthi i-oksijini iphazamise.

Izibani ezijwayelekile ze-mercury arc zivame ukulwa lapha ngoba ukwandisa amandla azo nakho kwandisa kakhulu ukushisa, okungahlanekezela izinto ezizwela ukushisa njengemikhono yokuncipha noma amalebula ashisayo. Yilapho ukushintshela ku-UV LED Curing for Flexo & Labels iba yisidingo sokusebenza kunokuba nje ukuthuthukisa.

Ubuchwepheshe be-UV LED buxazulula kanjani izinkinga zokuphulukisa ngesivinini esiphezulu?

Impendulo Esheshayo:

Izinhlelo ze-UV LED zixazulula izinkinga zokuphulukisa ngesivinini esiphezulu ngokunikeza ukukhanya okusheshayo, okuphezulu ngaphandle komthwalo wokushisa wezibani ze-mercury. Bakhipha ubude obuhlosiwe (imvamisa i-385nm noma i-395nm) engena ekujuleni kwezingqimba zeyinki ezijiyile, ukuqinisekisa ukwelashwa okugcwele ngisho nangesivinini esiphezulu sokucindezela.

Ukunwetshwa okuningiliziwe:

Isiguquli somdlalo sokuphrinta ngesivinini esiphezulu yimvelo yokukhishwa kwe-LED. Ngokungafani nezibani ze-mercury ezifafaza amandla ku-spectrum ebanzi (iningi lazo lichithwa njengokushisa), ama-LED e-UV angama-monochromatic. Bagxila ku-100% wamandla abo ku-bandwidth ethile esebenzayo yokwelapha.

1. I-High Peak Irradiance: Izibani ze-UV LED zingaletha ukukhanya okuphezulu kakhulu (kulinganiswa ngama-Watts / cm²) uma kuqhathaniswa nezibani ze-arc. Le "punch" enamandla kakhulu ibalulekile ekunqobeni ukuvinjelwa kwe-oksijini ebusweni ngokushesha.
2. Ukuphathwa kokushisa: Ukucindezela okusheshayo kuvame ukugijima amafilimu amancane, angasekelwa. Izibani ezijwayelekile zikhipha imisebe ye-infrared (IR), eshisa iwebhu. Ukuze uphulukise ngokushesha ngezibani ze-arc, uvula amandla, avula ukushisa, kubangele izinkinga zokubhalisa noma ukwelula iwebhu. Ama-LED e-UV akhipha amandla we-zero IR ku-substrate, akuvumela ukuthi uqhumise inki ngamandla amakhulu okuphulukisa ngaphandle kokuncibilikisa iwebhu.
3. I-Instant On / Off: Imigqa enejubane eliphakeme iyahlupheka lapho izibani zidinga isikhathi sokushisa. Ama-LED we-UV avula / avala ngokushesha. Uma ukucindezela kumisa, izibani ziyacima ngokushesha, ukuvimbela ukushiswa kwewebhu. Lapho umshini ukhuphuka, ama-LED ahambisana nejubane ngokushesha.

Ukuze uthole ukujula okujulile ekukhetheni i-hardware efanele, funda nge- Uhlelo oluhle kakhulu lokuphulukisa lwe-UV LED lokuphrinta ilebula le-Flexo.

Yimaphi ama-wavelength angcono kakhulu ekwelapheni ngesivinini esiphezulu?

Impendulo Esheshayo:

Ngezinhlelo zokusebenza eziningi zokuphulukisa ngesivinini esiphezulu, i-395nm iyi-wavelength ejwayelekile ngoba inikeza ibhalansi engcono kakhulu yokungena kokujula nokwelashwa komhlaba. Kodwa-ke, i-385nm iya ngokuya ithandwa ngamajazi acacile nama-adhesives lapho ukuvimbela ophuzi kubalulekile.

Ukunwetshwa okuningiliziwe:

Ukukhetha i-wavelength engalungile kuyimbangela ejwayelekile yokwelashwa okungalungile. Ubude be-wavelength bunquma ukuthi ukukhanya kuhamba ngokujula kangakanani kwifilimu ye-inki.

• I-395nm: Leli yihhashi lomsebenzi embonini. Ingena kahle ngama-inks anemibala eminingi (njengabamnyama abaminyene noma abamhlophe abangabonakali), okunzima kakhulu ukwelapha ngesivinini.
• I-365nm: Ngokwesiko isetshenziselwa ukwelapha ubuso ukudala ungqimba oluphezulu oluqinile, olumelana nokuklwebha. Kodwa-ke, ama-wavelengths amafushane alwela ukungena kuma-pigment amakhulu.
• Ama-Arrays ahlanganisiwe: Ezinye izinhlelo ezithuthukile zisebenzisa inhlanganisela yama-wavelengths ukuqinisekisa kokubili ukunamathela (ukwelashwa okuyisisekelo) kanye nendawo engenayo i-tack.

Uma ama-photoinitiators akho alungiselelwe i-365nm (ejwayelekile kuma-inki amadala wesibani se-arc) kodwa usebenzisa isibani se-LED esingu-395nm, inki ngeke iphulukise kahle, noma ngabe ugijima kancane kangakanani. Kufanele uqinisekise ukuthi uchungechunge lwakho lweyinki "lulungiselelwe i-LED" ngobude obuthile besibani sakho.

Funda kabanzi ngalesi sihloko:Yimaphi ama-wavelength angcono kakhulu kuma-inki we-flexo UV?

How critical is lamp position and maintenance?

Impendulo Esheshayo:

Isikhundla sesibani sibalulekile; ukuhambisa isibani se-UV nje esingu-10mm ukusuka ku-substrate kunganciphisa amandla alethwe ngaphezu kuka-30%. Ukuze uthuthukise ukwelashwa, qiniseka ukuthi ikhanda lesibani lifakwe eduze kwewebhu njengoba umenzi encoma (imvamisa i-2-5mm) futhi ugcine iwindi le-quartz lingenayo inkungu yeyinki.

Ukunwetshwa okuningiliziwe:

I-Physics ithi ukukhanya okukhanyayo kulandela umthetho we-Inverse Square. Lokhu kusho ukuthi njengoba uphinda kabili ibanga ukusuka emthonjeni wokukhanya, ukuqina kwehla kuya kwikota eyodwa. Esimweni esisheshayo esiphezulu, awukwazi ukukhokhela ukulahlekelwa amandla anjalo.

Uhlu lokuhlola lwe-Optimization:

• Hlola igebe: Qinisekisa ukuthi igebe phakathi kwe-LED array newebhu liyahambisana. Uma iwebhu iqhuma, sebenzisa i-roller ebandayo noma i-roller yokulondoloza ukuyizinzisa ngqo ngaphansi kwesibani.
• Hlanza i-Optics: Ukucindezela okusheshayo okuphezulu kukhiqiza inkungu yoyinki nothuli. Ungqimba oluncane lokungcola efasiteleni lengilazi yesibani lusebenza njengelensi yengilazi yelanga, ivimbela amandla e-UV. Sungula iphrothokholi yokusula amakhanda ezibani ekuqaleni kweshift ngayinye usebenzisa i-solvent evunyiwe.
• Ukuqapha okukhiphayo: Ungaqageli. Sebenzisa i-radiometer (elinganiselwe ngokukhethekile i-LED uma usebenzisa i-LED) ukukala okukhiphayo kwangempela okufinyelela kuwebhu. Ama-LED anciphisa kancane kakhulu, kepha ama-optics angcolile noma izinkinga zokuphakelwa kwamandla zinganciphisa ukukhishwa okungalindelekile.

How do you troubleshoot "Surface tack" vs. "Through Cure"?

Impendulo Esheshayo:

I-Surface Tack isho ukuthi ungqimba oluphezulu lunamathele (ukuvinjelwa kwe-oksijini), okuvame ukulungiswa ngokwandisa ukukhanya noma ukusebenzisa i-wavelength emfushane. Ukwehluleka kwe-Cure kusho ukuthi inki ikhipha i-substrate, okubonisa ukuthi ukukhanya akuzange kungene phansi; Lokhu kulungiswa ngokwandisa isikhathi sokuhlala noma ukusebenzisa ubude obude (njenge-395nm).

Ukunwetshwa okuningiliziwe:

Ukuhlukanisa phakathi kwalezi zinkinga ezimbili kubalulekile ngoba ukulungiswa kuphambene.

Scenario A: The Thumb Twist Test (Surface Cure)

Ucindezela isithupha sakho kuphrinta bese usonteka.

• Umphumela: Ushiya umunwe noma ubuso buzizwa buyinjoloba.
• Ukuxilongwa: I-oksijini emoyeni ibulala ikhambi ebusweni.
• Ukulungisa: Udinga ukukhanya okuphezulu okuphezulu (ukuqina okuthe xaxa, hhayi amandla aphelele). Hlola ukuthi ukugxila kwesibani kubukhali noma uma ukusethwa kwamandla ku-100%.

Scenario B: The Tape Test (Through Cure / Adhesion)

Faka itheyiphu kuphrinta bese uyikhipha.

• Umphumela: I-inki iphakamisa i-substrate ngokuhlanzekile.
• Ukuxilongwa: Ukukhanya kwe-UV akukaze kufinyelele ezansi kwesendlalelo sikayinki ukuze kuhlanganiswe nezinto ezibonakalayo.
• Into esemqoka - lokhu kuyinkinga yokungena. I-inki ingahle ibe mikhulu kakhulu (isisindo esiphakeme sefilimu), noma umthwalo we-pigment uvimbela ukukhanya. Kungadingeka ukuthi unciphise ukucindezela (ukwandisa umthamo / isikhathi sokuhlala) noma ushintshele kubude be-wavelength engena kangcono (njenge-395nm).

Ingabe ukuphathwa kwe-inki kunganciphisa izinkinga zokwelapha?

Impendulo Esheshayo:

Yebo, ukugcina i-viscosity ye-inki efanele kanye nobukhulu befilimu kubalulekile. Amafilimu we-inki amancane aphulukisa ngokushesha futhi ngokulinganayo. Inkinobho e-emulsified ngokweqile (ku-offset) noma inkinobho ene-viscosity engalungile (ku-flexo) ingavimba ukudluliswa kokukhanya kwe-UV, okuholela ekwelapheni okungaphelele kungakhathalekile amandla esibani.

Ukunwetshwa okuningiliziwe:

I-chemistry ye-inki kufanele ihambisane ne-physics yesibani.

1. Isisindo sefilimu: Lapho uyinki ujiyile, kuba nzima kakhulu ukwelapha. Ku-flexo, ukusebenzisa umqulu we-anilox ovolumu ophansi kungasiza ukubeka phansi ungqimba oluncane, olulawulekayo olulapha ngokushesha ngesivinini esiphezulu.
2. Umthwalo we-Photoinitiator: Uma ugijima ngesivinini esiphezulu, ama-inks "ajwayelekile" okuphulukisa angahle angaphenduli ngokushesha ngokwanele. Ungadinga ukwakheka kwe-inki "okusheshayo" noma "okusebenzayo kakhulu" okuklanyelwe ngomthwalo ophakeme wama-photoinitiators.
3. Ukulawulwa Kwephunga: Ukuphulukiswa okungaphelele kuyimbangela # 1 yephunga emaphaketheni. Ama-monomers angalapheki ayaguquguquka futhi aphunga. Uma uphrinta amalebula okudla, ukuqinisekisa ukwelashwa okugcwele kuyinkinga yokuhambisana nokuphepha, hhayi nje ikhwalithi.

Funda kabanzi ngalesi sici esibucayi: Indlela Yokunciphisa Iphunga ku-UV Flexo Inks nge-LED Curing.

5-step routine to optimize high-speed curing

Ukuze uqinisekise imiphumela engaguquguquki, sebenzisa le nqubo ejwayelekile yokusebenza (SOP) yabaqhubi bakho bezindaba:

Isiphetho

Ukuthuthukisa ukwelashwa kokuphrinta kwewebhu okusheshayo akuvamile nje "ukuvula amandla." Lokhu kumayelana nokusetshenziswa okuhlakaniphile kwamandla. Ngokushintshela ezinhlelweni ze-UV LED, ukufanisa i-inki yakho yamakhemikhali nobude besibani sakho, nokuphatha ngokuqinile igebe elibonakalayo phakathi kwesibani newebhu, ungaphula umgoqo wejubane.

Akudingeki ukhethe phakathi kwejubane nekhwalithi. Ngokusetha okufanele, ungasebenzisa umshini wakho ngesivinini esiphezulu esilinganisiwe ngenkathi uletha ukuphrinta okomile, okuhlala isikhathi eside, futhi ongenaphunga ngaso sonke isikhathi.