Yini okufanele uyihlole ngaphambi kokubuyisela kabusha i-UV ye-LED kumshini we-offset

Ukubuyisela kabusha i-UV ye-LED kumshini we-offset kungenye yezithuthukisi ezinomthelela kakhulu isitolo sokuphrinta esingazenza, ngokushesha ukuguqula umshini omdala ube yi-high-speed, amandla okuphulukisa ngokushesha. Kodwa-ke, akusona isixazululo "se-plug-and-play"; Kudinga ukuhlolwa okuqondile kwezobuchwepheshe kwemishini yakho ekhona, amakhemikhali, kanye nokuhamba komsebenzi ukuvimbela isikhathi sokuphumula esibizayo.

Noma ngabe ufuna ukuqeda i-powder yokufafaza, ukunciphisa izindleko zamandla ngo-70%, noma ukusheshisa izikhathi zokuguqula, impumelelo ye-retrofit yakho incike ekulungiseleleni. Ngezansi uhlu lokuhlola olucacile lwabanikazi bezitolo zokuphrinta nabaphathi bokukhiqiza ababheka ukushintshela ku-LED UV.

Ingabe umshini wakho wokucindezela ulungele i-LED UV retrofit?

Ngaphambi koku-oda uhlelo, kufanele uqinisekise ukuthi umshini wakho unemvume eyanele yomzimba phakathi kwamayunithi wokuphrinta (i-interdeck) nasekugcineni kokulethwa ukuze uhlale amakhanda ezibani ze-LED ngaphandle kokuvimbela ukudluliswa kwamashidi.

Iningi lanamuhla lokucindezela kwe-offset lingakwazi ukwamukela amakhanda e-LED, kepha kufanele ulinganise "isikhala sokuhlala" phakathi kwesilinda sombono nesigubhu sokudlulisa. Ngenkathi ama-arrays e-LED ehlangene, amabakaki akhuphukayo adinga umugqa ocacile wokubona ku-substrate. Qinisekisa ukuthi imigoqo yokubamba, amathreyi okuwasha, kanye nogada abakhona abavimbeli indlela yokukhanya noma kushayisana namakhanda amasha. Imvume engu-50mm kuya ku-100mm kusuka ku-substrate imvamisa ilungele ukukhanya okuhle.

Ukuhlola ukufaneleka komzimba nokukhuphuka

Lapho ngiqala ukubonisana nge-retrofit ye-6-color Heidelberg Speedmaster, ithimba lacabanga ukuthi amakhanda e-LED azofanelana ngqo nalapho ama-dryers amadala e-IR ayekhona. Babenephutha. Amakhanda e-LED ayemancane kakhulu, kepha amabakaki akhuphukayo kwakudingeka enziwe ngokwezifiso ukuze agweme ukushaya imigoqo ye-gripper ngesikhathi sokujikeleza ngesivinini esikhulu.

Amasheke abalulekile we-Mechanical:

• I-Interdeck Clearance: Linganisa igebe phakathi kwamayunithi wokuphrinta. Ama-LED arrays amancane, kepha adinga ukukhwezwa okuqinile ukuvimbela ukudlidliza okubangelwa ukudlidliza.
• Ukwakhiwa Kokulethwa: Uma ushintsha umhubhe womoya oshisayo noma we-IR, kungenzeka uthole isikhala. Kodwa-ke, kufanele uqinisekise ukuthi umzila weshidi uzinzile; ngaphandle kokushisa kwe-IR, amashidi aziphatha ngendlela ehlukile aerodynamically.
• Ukuvikelwa kokukhanya: I-UV ye-LED inamandla. Kufanele uhlole amaphaneli akho okubuka ukulethwa. Uma zingalinganiswanga nge-UV, kufanele zishintshwe noma ziqoshwe ukuvikela amehlo opharetha.

Ngabe uqinisekisile ukuhambisana nama-inki aqondene ne-LED

Awukwazi ukumane ugijime ama-inki ajwayelekile we-UV ngaphansi kwesibani se-LED; kufanele uqinisekise ukuthi umphakeli wakho we-inki unikeza ukwakheka kwe-"LED-tuned" okuphendula ngokuqondile ku-385nm noma i-395nm wavelength.

Ama-inki ajwayelekile e-UV aklanyelwe ukwelapha ngaphansi kobubanzi bezibani ze-mercury arc (cishe. 200nm-450nm). Ukukhishwa kwe-UV ye-LED kuyi-monochromatic, imvamisa ifinyelela ku-395nm. Uma usebenzisa inkinobho ejwayelekile ye-UV, izohlala i-tacky noma ingalapheki ngoba ama-photoinitiators ngeke abangele. Kufanele uhlole uhlu lwakho futhi uvikele uchungechunge lokuhlinzekwa kwama-inki aqondene ne-LED, ukumboza, kanye nabamhlophe abamhlophe ngaphambi kokuqala kokubuyiselwa kabusha.

The Chemistry Shift: Photoinitiators Matter

Ugibe olujwayelekile engilubonayo yinganekwane "ye-inki yendawo yonke". Ngenkathi amanye ama-inks aphulukisa kabili ekhona, ama-inki we-LED azinikele enza kahle kakhulu. Umkhawulokudonsa omncane wobuchwepheshe be-LED udinga ama-photoinitiators asebenzayo kakhulu.

• Isheke "eliphuzi": Ama-varnishes okuqala e-LED ayethambekele ekuphuzi ngaphezulu kwesikhala esimhlophe ngenxa yokuhlushwa okuphezulu kwama-photoinitiators. Buza umphakeli wakho ukuthi agqoke i-LED "ephuzi ephansi" noma "ekhanyayo ngokubonakalayo", ikakhulukazi uma uphrinta izincwajana zezohwebo ezisezingeni eliphakeme.
• Ukuhlolwa Kokunamathela: Ngoba i-LED iphulukisa kusuka phansi kuya phezulu (ngokungafani nokwelashwa okuphezulu kwezibani ze-arc), ukunamathela kuvame ukuba phezulu. Kodwa-ke, kufanele wenze ukuhlolwa kweteyipu ngokushesha ngemuva kokugijima kwesivivinyo sokuqala ukuqinisekisa ukuthi inki ibopha kuma-substrates akho athile, ikakhulukazi kumapulasitiki angewona ama-porous.

Ithiphu ye-Pro: Ukuze uthole ukujula okujulile kokuthi inqubo yokuphulukisa ihluke kanjani ezindleleni zokuphrinta, buyekeza umhlahlandlela wethu kuUV LED Curing for Offset Printing.

Ingabe unayo ama-roller afanele nezingubo zokulala ezifakiwe?

Ama-roller enjoloba ajwayelekile nezingubo zokulala zizovuvukala, zifake, noma zihlakazeke lapho zivezwa kuma-monomers e-UV kanye nama-solvents wokuhlanza anolaka; kufanele ushintshele ku-EPDM noma kumakhemikhali "ahlanganisiwe".

Ama-inks ajwayelekile asuselwa kuwoyela asebenzisa amakhemikhali enjoloba angahambisani namakhemikhali anolaka we-UV inks nokuwasha. Ngaphambi kokudubula uhlelo lwakho olusha lwe-LED, kufanele ufake esikhundleni sesitimela sakho sonke se-roller nezingubo zokulala nge-EPDM (Ethylene Propylene Diene Monomer) impahla. Ukwehluleka ukwenza kanjalo kuzoholela kuma-roller "avuvukele" abhubhisa ukubhaliswa futhi adale ukungqubuzana kokushisa, okungalimaza amakhanda akho amasha e-LED.

Izindleko ezifihliwe zokungahambisani

Ngikhumbula isitolo esasizama ukonga imali ngokuqhuba imisebenzi "exubile" kuma-roller ajwayelekile, ukugeza phakathi kwamashifti. Kungakapheli amasonto amabili, ama-roller abo efomu ayevuvukele ngo-15%, okwenza i-inki iphume futhi ibhubhise iqoqo lamapuleti.

Uhlu lwakho lokuhlola olusetshenziswayo:

• Ama-EPDM Rollers: Lawa amelana nama-acrylates ku-inki we-UV.
• Izingubo ze-UV: Lezi zinephrofayili ehlukile yokukhipha inkinobho ye-UV ngokuhlanzekile.
• Ukugeza: Awukwazi ukusebenzisa imimoya yamaminerali. Udinga ukugeza okuqondene ne-UV okungeke kuhlasele iraba ye-EPDM.

Ingabe ingqalasizinda yakho kagesi nokupholisa yanele?

Ngenkathi i-UV ye-LED isebenza kahle ngamandla, idinga amandla azinzile we-DC kanye nezivumelwano ezithile zokupholisa (imvamisa ezibandayo ngamanzi) ezihluke kakhulu ku-AC ephezulu kanye nokukhishwa komoya kwezibani ze-arc.

Izinhlelo ze-UV ze-LED zinciphisa ukusetshenziswa kwamandla kuze kufike ku-70% uma kuqhathaniswa nezibani ze-mercury, kepha zishintsha uhlobo lwamandla owadingayo. Uzodinga ukufaka amaconsi amasha we-400V / 480V kumakhabethe omshayeli we-LED. Ngaphezu kwalokho, izinhlelo eziningi ze-high-speed offset ze-LED zipholile ngamanzi ukugcina ukuzinza kokushisa kwe-junction. Kufanele uqinisekise ukuthi unesikhala saphansi seyunithi ye-chiller kanye nendlela yamapayipi okupholisa ukufinyelela ekulethweni kokucindezela.

Ukuphatha Ukushisa nokuzinza

Yize ukukhanya uqobo "kupholile" (kukhipha i-IR encane), ama-chips e-LED akhiqiza ukushisa okumele aphathwe ukugcina isikhathi sokuphila samahora angama-20,000 +.

• Amanzi vs. Ukupholisa Umoya: Ngewebhu emincane noma isivinini esincane, ukupholisa umoya kungakwanela. Ngomshini wokucindezela we-40-intshi osebenza ku-15,000 sph, ukupholisa kwamanzi akunakuphikiswa. Iqinisekisa ukuthi i-LED array ihlala emazingeni okushisa angaguquguquki okusebenza, ivimbela ukwehla kwamandla ngesikhathi sokushintsha okude.
• Akukho ukukhishwa kwe-ozone: Enye inzuzo enkulu yokuhlola uhlu lwakho ukususwa kwe-ozone ducting. I-UV ye-LED ayikhiqizi i-ozone, ikuvumela ukuthi ubuyisele isikhala sophahla futhi uyeke ukulungisa umoya owukhipha ngaphandle.

Uma futhi uhlola ama-hybrids edijithali, kuyafaneleka ukuqhathanisa lezi zidingo ne Indlela Yokwelapha I-UV LED Isebenza Ngayo Ekuphrithelweni Kwe-Inkjet, njengoba izidingo zokupholisa zingafana ngokumangazayo.

Uzophatha kanjani ukufanisa umbala nobufakazi?

I-UV ye-LED iphulukisa inki ngokushesha cishe akukho "eyomile-emuva," okusho ukuthi ishidi lakho eliphrintiwe lizobukeka lifana neshidi elimanzi; kufanele uphinde ulinganise ama-curves akho we-prepress namaphrofayli we-ICC ukufanisa leli qiniso elisha.

I-inki ejwayelekile ye-offset ishintsha umbala njengoba yoma (eyomile-emuva). Abaqhubi bezindaba bavame ukugijima ukuminyana okuphezulu ukunxephezela. Nge-LED UV, lokho okubonayo yilokho okutholayo. Lokhu kuqeda ukuqagela kepha kudinga ukuthi ubuyekeze amaphrofayli akho wobufakazi. Uma ubufakazi bakho bulingisa umbhalo owomile we-inki ojwayelekile, amaphrinta akho e-LED azobukeka "abukhali kakhulu" noma agcwele uma kuqhathaniswa.

The Dot Gain Factor

I-inki ye-UV ye-LED ihlala ngaphezulu kwephepha kunokuba idonce kuwo. Lokhu kuholela ku:

1. Amazinga aphezulu e-gloss: I-inki ayingena emicu.
2. Amachashazi abukhali: Inzuzo encane yamachashazi emzimbeni ngokumuncwa.
3. Vibrancy: Imibala ivela ngaphezulu kumasheya angafakwanga.

Uzodinga ukuqhuba ukuhlolwa kweminwe emshinini ngokushesha ngemuva kokubuyisela kabusha ukusungula ama-curves amasha we-dot gain ye-RIP yakho.

Summary Checklist for Retrofitting

Ukubuyisela emuva kuyisinyathelo samasu esiqinisekisa ikusasa labo. Ngokubhekana nalezi zivivinyo—ikakhulukazi ukulingana kwemishini, ukuhambisana kwamakhemikhali, nokuphathwa kokushisa—uqinisekisa ukuthi utshalomali lwakho lukhokha ngesivinini esiphakeme nekhwalithi yokuphrinta ye-premium kusukela osukwini lokuqala.

Uma ucabanga ukuthuthukiswa okufanayo kwemishini yakho yedijithali, ukuthola Yikuphi ukuphulukiswa kwe-UV LED Lamp engcono kakhulu ukuphrinta kwe-inkjet? inganikeza ukuqonda okufanayo ekukhetheni ubude be-wavelength nokuminyana kwamandla.

Offset Web Press Retrofit kusuka ku-UV kuya ku-SST LED Case Study