Ungayivimbela kanjani i-UV Ink Smearing ngokuphulukisa okufanele kwe-LED

Ukuvimbela ukugcoba kwe-UV kudinga ibhalansi eqondile ye-UV LED irradiance (ukuqina) ukunqoba ukuvinjelwa kwe-oksijini ebusweni, kanye nokuqina kwamandla okwanele (umthamo) ukuqinisekisa ukunamathela ku-substrate. Uma ukuphrinta kwakho ku-tacky noma ukugcoba, inkinga imvamisa ivela ekungahambisani phakathi kwejubane lomugqa wakho, ubude besibani, nokwakhiwa kweyinki.

Kulesi siqondiso, sizoxazulula inqubo yakho yokuphulukisa ngokulawula:

• I-Peak Irradiance: Ukwephula "umgoqo we-oksijini" wendawo eyomile.
• Ukuqina kwamandla: Ukuqinisekisa ukwelashwa okujulile kokunamathela.
• Ukufanisa ubude be-Wavelength: Ukuqondanisa okukhiphayo kwe-365nm-405nm ngama-photoinitiators we-inki.
• Amasu okuphazamisa: Amachashazi okuqandisa ngaphambi kokwelashwa kokugcina.
• Ukugcinwa kwesibani: Ukuhlanza ama-optics ukubuyisela amandla alahlekile.

Ukuze uthole ukuqonda okubanzi kwezinto eziyisisekelo, ungabhekisa ku-UV LED ink curing guide.

Why UV Ink Smears: The Science of "Under-Curing"

Lapho inki ye-UV ihlambalaza, kuyaqabukela ukuthi "inki embi." Cishe ngaso sonke isikhathi ukwehluleka kokuphendula kwamakhemikhali okwaziwa ngokuthi i-polymerization. Ngokungafani nama-inki we-solvent owomile ngokuhwamuka, ama-inks e-UV aphulukisa ngokushesha lapho ama-photoinitiators amunca ukukhanya kwe-UV.

Kodwa-ke, izinhlobo ezimbili zokwehluleka zibangela ukuphazamiseka:

1. I-Surface Tack (Oxygen Inhibition): Phansi kwesendlalelo sikayinki kuyaphulukiswa, kepha phezulu kuhlala kunamathela. Lokhu kwenzeka ngoba i-oksijini emoyeni ivimbela amakhemikhali ukwelashwa ebusweni. Ukulungisa lokhu, udinga i-Peak Irradiance ephakeme (elinganiswa ku-W / cm²) ukuze "isibhakela" ngokusebenzisa isithiyo se-oksijini.
2. Ukwehluleka kokwelapha: Ubuso bomile, kepha inki iyahlikihla noma imibimbi. Lokhu kusho ukuthi ukukhanya kwe-UV akuzange kungene ekujuleni ngokwanele ukubopha inki ezintweni ezibonakalayo. Lokhu kuvame ukudinga ukuminyana kwamandla aphakeme (kulinganiswa ku-J / cm²), okuyisici sesikhathi namandla.

Ukuqonda indlela UV LED ukuphulukisa isebenza ukuphrinta inkjet kubalulekile: ngokungafani ebanzi-spectrum izibani mercury, LEDs ukukhipha band emincane ukukhanya. Uma lelo bhendi lingashayi amandla athile okusebenza kweyinki yakho, ukusabela kuzoma, okuholela kuma-smears.

5 Izimbangela ezijwayelekile zokugcwala inki (nokuthi ungazilungisa kanjani)

Uma ubona inkinobho emanzi noma i-rub-off, hlola lezi zigebengu ezinhlanu kuqala.

1. Ama-wavelengths angahambisani

Izibani ze-UV LED zivame ukukhipha ku-365nm, 385nm, 395nm, noma 405nm. Uma inkinobho yakho yakhelwe ukusabela ngokuyinhloko ku-365nm (ukwelashwa komhlaba) kepha izibani zakho zingama-395nm (ukwelashwa okujulile), ungagcina unendawo ye-tacky. Njalo hlola ishidi lakho ledatha yezobuchwepheshe (TDS) ye-inki.

2. Amafasitela Wesibani Engcolile

Lena ukuqapha okuvame kakhulu. Izinhlelo zokuphulukisa i-UV zivame ukutholakala eduze kwamakhanda okuphrinta lapho inkungu yeyinki inqwaba inqwabelana. Ungqimba oluncane lwenkungu yeyinki ephulukisiwe efasiteleni le-quartz linganciphisa ukukhishwa kwe-UV ngo-30-50%.

• Isixazululo: Hlola ingilazi yesibani nsuku zonke. Uma kubukeka kungabonakali, kuvimbela amandla e-UV adingekayo ekwelapheni ngokuphelele.

3. Ijubane vs. Ukungalingani komthamo

Ukwandisa ijubane lomugqa kunciphisa "isikhathi sokuhlala"—inani lesikhathi inki evezwa ekukhanyeni kwe-UV. Uma uphinda kabili ijubane, unciphisa umthamo wamandla ophelele ngesigamu.

• Ukulungisa: Uma usheshisa ibhande, kufanele ukhuphule ngokulinganayo ukuqina kwe-LED noma ungeze amanye amamojula okuphulukisa.

4. Ink thickness (opacity)

Ama-inks anemibala eminingi (ikakhulukazi omnyama nomhlophe) asebenza njengama-UV. Uyinki omhlophe ukhombisa ukukhanya kwe-UV, kuyilapho omnyama uyimunca ngaphambi kokuthi ifinyelele ungqimba oluphansi.

• Ukulungisa: Izingqimba zeyinki ezijiyile zidinga ukuminyana kwamandla aphezulu (ijubane elihamba kancane) ukuphulukisa yonke indlela eya ku-substrate.

5. Ukungahambisani kwe-substrate

Ukuphrinta ezintweni zamandla aphansi (njenge-polypropylene engalashwanga noma i-HDPE) kuvame ukubukeka njengokuhluleka kokwelapha, kepha empeleni kungukwehluleka kokunamathela. I-inki iyaphulukisa kodwa ayinamatheli.

• Isixazululo: Yenza isivivinyo se-dyne ezintweni ezibonakalayo. Ungadinga ukwelashwa kwe-corona noma i-primer.

"Isikhali Esiyimfihlo": Ukusebenzisa i-UV Pinning

Uma inkinobho yakho iphuma igazi noma igcoba ngaphambi kokuthi ifinyelele esibani sokugcina sokuphulukisa, udinga "ukukhomba."

Ukukhonya kuhilela ukusebenzisa umthombo ophansi we-UV LED (imvamisa ngokushesha ngemuva kwekhanda lokuphrinta) "ukuqandisa" ithonsi likayinki endaweni. Ayiphilisi ngokuphelele inki, kepha yandisa i-viscosity ngokwanele ukuvimbela ichashazi ekusakazekeni noma ekuxubeni neminye imibala.

Izinzuzo ze-Pinning:

• Umbhalo obukhali: Uvimbela ukuzuza kwamachashazi.
• Ukulawula Umbala: Imisa imibala emanzi ekudideni.
• Ukugcoba okuncishisiwe: I-inki iqinile ngaphambi kokuthi ishaye isiteshi sokuphulukisa esinamandla amakhulu.
• Ithiphu Yokusetha: Setha izibani zakho zokukhomba ku-10-20% ukuqina. Uma inkinobho iqhekeka noma i-peeling kamuva, i-pinning yakho ingahle ibe namandla kakhulu (ukwelapha ngaphezulu kwendawo kusenesikhathi).

Optimizing LED Settings for a Smear-Free Cure

Ukuze ugweme ukugcoba, kufanele uthuthukise i-geometry namandla okusetha kwakho. Ngisho best UV LED ukuphulukisa isibani ukuphrinta inkjet ngeke kwehluleke uma ibekwe ngokungalungile.

1. Nciphisa igebe (ibanga lokusebenza)

Ukukhanya kwe-UV kulandela umthetho we-Inverse Square. Ukuhambisa isibani kusuka ku-2mm kuya ku-10mm kude ne-substrate kungaholela ekulahlekelweni okukhulu kwe-peak irradiance.

• Target Distance: Gcina igebe 2mm kuya ku-5mm phakathi LED ekhipha iwindi kanye substrate for umthelela esiphezulu.

2. Tune Irradiance vs. Energy Density

• Ukulungisa izindawo ezinamathelayo (i-tack): Khulisa ukuqina (%) kwisilawuli sakho. Udinga amandla aphezulu ukuze unqobe ukuvinjelwa kwe-oksijini.
• Ukulungisa i-rub-off (ukunamathela): Nciphisa ijubane lomugqa. Lokhu kwandisa umthamo ophelele wamandla (isikhathi sokuvezwa) ngaphandle kokushintsha ukuqina.

3. Ukuphathwa Okushisayo

Ama-LED ashisa ngokweqile alahlekelwa ukusebenza kahle. Uma iyunithi yakho yokuphulukisa ishisa (>40 ° C ezindlini), ukukhishwa kwe-UV kuyancipha, okuholela ekwelapheni okungahambisani ngesikhathi sokushintsha okude. Qinisekisa ukuthi ama-chillers amanzi noma abalandeli bomoya basebenza kahle.

Ukugcinwa okujwayelekile ukuvimbela ukugcwala kwesikhathi esizayo

Umshini ohlanzekile ungumshini ongaguquguquki. Sungula le protocol elula ukuyeka ukugcwala ngaphambi kokuthi kuqale.

• Nsuku zonke: Hlola iwindi le-quartz le-LED array. Sula nge->99% ye-Isopropyl Alcohol kanye nendwangu engenalint-free uma kukhona inkungu ebonakalayo.
• Masonto onke: Hlola amazinga e-chiller fluid (ezinhlelweni ezipholile ngamanzi) noma uhlanze izihlungi ze-fan (zezinhlelo ezipholile umoya).
• Njalo ngenyanga: Yenza isheke le-radiometer. Linganisa ukukhishwa kwangempela kwe-UV ezingeni lebhande ukuqinisekisa ukuthi ama-LED awawohloka.

Iphutha elivamile: Ungasebenzisi izihlanza zengilazi ezijwayelekile noma ama-solvents anezithasiselo ezithambisa efasiteleni le-quartz; zishiya izinsalela ezivimbela ukukhanya kwe-UV.

FAQ: Ukuxazulula i-Sticky UV Prints

Kungani ukuphrinta kwami kwe-UV kunamathela ngemuva kokwelashwa?
Ukuphrinta okunamathelayo kuvame ukubangelwa "ukuvinjelwa kwe-oksijini," lapho umoya uvimba khona ukwelashwa komhlaba. Khulisa ukukhanya kwakho kwe-LED (amandla) noma unciphise ibanga phakathi kwesibani ne-substrate ukulungisa lokhu.

Ngiyihlola kanjani uma inkinobho ye-UV iphulukise ngokuphelele?
Yenza isivivinyo se- "thumb twist" (cindezela bese usonteka isithupha sakho kuphrinta) noma ukuhlolwa kwe-ASTM D3359 cross-hatch tape. Uma i-inki idluliselwa esikhunjeni sakho noma i-tape, ayilapheki.

Ungakwazi yini ukwelapha ngokweqile inki ye-UV?
Yebo. Ukuphulukisa ngokweqile kungenza inki ibe brittle, kubangele ukuthi iqhekeke noma iphume lapho izinto zigoba. Kungase futhi kubangele ukuthi i-substrate iphume ekushiseni ngokweqile.

Yini engcono wavelength for UV LED ukuphulukisa?
Iningi izinhlelo zokusebenza ejwayelekile inkjet sebenzisa 395nm for ukuphulukiswa ezijulile. Kodwa-ke, i-365nm imvamisa ingcono ekuphulukiseni ubuso namajazi acacile. Hlola ishidi lakho lomkhiqizi we-inki ukuze uthole ubude obudingekayo.

Ingabe umswakama uthinta UV ukuphulukisa?
Umswakama okuphezulu ngokuvamile akuthinti UV ukuphulukisa ukusabela uqobo, kodwa kungathinta ukungezwani ebusweni substrate sika, okuholela abampofu ukunamathela noma ezindabeni manzi.

Kufanele isibani se-UV sisondele kangakanani ephepheni?
Ngokufanelekile, isibani kufanele sibe ngu-2mm kuya ku-5mm kusuka ku-substrate. Wonke amamilimitha ebanga elengeziwe anciphisa kakhulu ukukhanya okuphezulu okufinyelela ku-inki.

Kungani inkinobho yami emnyama ye-UV ingaphuluki?
Uyinki omnyama udonsa ukukhanya kwe-UV, ukuvimbela ukungena ezansi kwesendlalelo. Ungadinga ukunciphisa isivinini sokuphrinta (ukwandisa umthamo) noma ukwehlisa ukuminyana kweyinki / ukusethwa kwe-opacity.

Isiphetho

I-Smearing iwuphawu lwenqubo engalingani, hhayi iphrinta ephukile. Ngokuqinisekisa ukuthi izibani zakho ze-LED zihlanzekile, zibekwe eduze kwe-substrate, futhi zisethwe ekuqineni okulungile ukunqoba ukuvinjelwa kwe-oksijini, ungafinyelela ekugcineni okuhlala isikhathi eside, okomile ngaso sonke isikhathi.

Uma ulwela ukuthola ibhalansi efanele phakathi kwejubane nekhwalithi yokwelapha, noma udinga ukuthuthukisa amamojula akho okuphulukisa wamanje, xhumana nethimba lonjiniyela e-UVET ukuze uthole ukuhlolwa kohlelo.