Nyob rau hauv lub cheeb tsam ntawm siab - ntim ntim thiab luam tawm luam ntawv, tau txais thiab ua kom cov xim tsis tu ncua yog ib qho nyuaj thiab yog ib qho cim ntawm qhov zoo. Kev tsim tus number case thiab lub tog raj kheej engraving yog qhov tseem ceeb ntawm cov txheej txheem no, tab sis rotogravure luam ntawv nto kho yog lub hnub qub tiag. Cov kauj ruam tseem ceeb no ua ntej luam ntawv yog qhov ua kom paub tseeb tias tus number case sticks tusyees, uas txhais tau hais tias txhua qhov kev khiav yuav muaj tib yam, ci xim uas yooj yim rau kev kwv yees thiab rov ua dua. Ntau thiab ntau, cov thawj coj hauv kev lag luam tau paub tias kev nqis peev hauv kev kho kom raug saum npoo rau rotogravure thooj voos kheej kheej tsis yog ib qho kev xaiv tab sis yuav tsum muaj kev sib tw kom zoo dua, cuam tshuam ncaj qha rau cov neeg pom cov hom thiab txo cov khoom pov tseg.
Yuav ua li cas Nto Zog cuam tshuam rau Ink Adhesion
Lub tswv yim tseem ceeb ntawm rotogravure luam ntawv yog txav tus number case los ntawm cov hlwb me me carved rau hauv lub tog raj kheej mus rau lub substrate, uas feem ntau yog cov khoom siv tau yooj yim xws li ntawv, zaj duab xis, lossis ntawv ci. The colour density, or how rich and opaque the printed ink film is, relies a lot on how well and evenly the ink comes out of these cells and sticks to the surface of the substrate.
Kev Tshawb Fawb Txog Yuav Ua Li Cas Wettable Surfaces Yog
Lub wettability ntawm lub substrate yog txiav txim los ntawm nws lub zog nto, uas yog ntsuas nyob rau hauv dynes / cm. Cov ntaub ntawv uas tsis tshua muaj zog, xws li polyethylene (PE) los yog polypropylene (PP) films, yog ib txwm hydrophobic thiab oleophobic, uas txhais tau hais tias lawv tsis lo rau cov inks tsis tu ncua. Yog tias qhov chaw tsis raug kho kom zoo, tus number case yuav hlaws thiab tsim cov tee dej, uas tuaj yeem ua rau cov pinholes, tsis sib xws, thiab xim ntom ntom uas tsis sib xws. Hauv kev ua ntej - xovxwm, txoj haujlwm tseem ceeb ntawm rotogravure lub tog raj kheej nto kho yog hloov thiab ua qauv lub zog saum npoo ntawm lub substrate mus rau qib siab dua li tus number case qhov nro. Qhov no tso cai rau tus number case "ntub tawm" tag nrho thiab tsim ib qho txuas ntxiv, tuab txheej.
Txoj hauv kev tseem ceeb los kho qhov chaw rau daim ntawv thov Rotogravure
Ntau qhov zoo -paub technologies yog siv los tig rau ntawm substrate nto. Qhov kev xaiv nyob ntawm cov khoom siv, nws luam tawm sai npaum li cas, thiab nws yuav tsum ua haujlwm zoo npaum li cas.
Txoj Cai Kev Lag Luam rau Kev Kho Mob Corona Discharge
Txoj hauv kev zoo tshaj plaws yog kev kho mob corona rau rotogravure luam ntawv, uas xa lub siab -voltage hluav taws xob tawm (corona) los ntawm lub substrate sai ua ntej nws mus txog lub tshuab luam ntawv. Qhov no ionises huab cua, uas tsim ozone thiab plasma uas oxidise saum npoo ntawm cov khoom, muab nws ntau zog thiab ua rau nws yooj yim rau number case los lo. Nws ua haujlwm zoo heev kom tau txais tus lej tas mus li ntawm ntau yam ntawm polyolefin films thiab cov ntaub ntawv, uas ncaj qha ua rau cov xim ruaj khov.
Tshuaj Primers thiab Nplaim kho mob
Kev kho cov nplaim hluav taws (nrog cov nplaim hluav taws xob tswj tau) lossis lub tsho nyias nyias tuaj yeem siv los hloov lwm txoj hauv kev rau qee yam dej num, xws li kev kho mob nyuaj -rau- kho cov polymers lossis ua ntej - luam tawm peb - ntim ntim siv rotogravure. Cov txheej txheem no kuj nce lub zog saum npoo thiab pab cov khoom sib txuas ua ke, uas ua rau cov xim ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom.
Ncaj qha cuam tshuam qhov zoo ntawm cov ntawv luam tawm thiab qhov sib xws ntawm cov xim ntom ntom
Nws yog tsis yooj yim sua kom exaggerate yuav ua li cas ze ze ntawm kev kho mob saum npoo yog rau qhov zoo ntawm cov ntawv tiav. Kev tuav tsis raug ua rau cov ntawv luam tawm tsis zoo uas tshwm sim raws li kev hloov pauv ntawm qhov ceev.
Tau tshem ntawm cov teeb meem luam tawm
Yog tias koj kho qhov chaw kom raug, cov teeb meem xws li kev tsis lees paub tus cwj mem, mottling (pob huab lossis tsis zoo), thiab cov cuab yeej tsis zoo (cov nplaum ntawm ib zaj duab xis ntub dej rau lwm qhov) yuav luag ploj mus. Kev kho deg ua kom ntseeg tau tias cov yeeb yaj kiab number case uas tau muab tso rau yog tas mus li thiab ntawm tib lub thickness los ntawm kev txwv cov teeb meem no. Qhov sib xws no yog qhov nws txhais tau tias kom muaj xim sib xws nyob thoob plaws lub vev xaib thiab los ntawm yob mus rau yob, uas yog qhov tseem ceeb heev rau siab -kawg cov duab thiab cov xim xim.
Ua kom ntau lawm sai thiab ua tau zoo dua
Niaj hnub no rotogravure printing presses ua hauj lwm ntawm high speeds. Cov tshuab luam ntawv tuaj yeem khaws cov kev ceev no yam tsis muaj kev poob zoo vim tias muaj cov txheej txheem kho kom zoo thiab zoo ib yam. Nws txo qis lub sijhawm nias rau kev hloov kho, txo tus lej pov tseg los ntawm kev rov ua haujlwm dua, thiab ua rau kev tsim khoom muaj txiaj ntsig zoo dua, tag nrho thaum ua kom cov xim ntom ntom uas xav tau rau cov khoom txee.
Cov kev coj ua zoo tshaj plaws thiab kev sib koom ua ke thev naus laus zis kom tau txais txiaj ntsig zoo tshaj plaws
Txhawm rau kom tau txais qhov zoo sib xws, koj xav tau ntau dua li muab tso rau hauv chav kho mob; koj yuav tsum xav txog cov txheej txheem.
Kev Tswj Xyuas Zoo thiab Kev Saib Xyuas
Nws yog ib qho tseem ceeb heev uas yuav tsum tau saib xyuas cov qib kev kho mob txhua lub sijhawm. Txhawm rau txhim kho xim ceev hauv ntim luam ntawv, dyne cwjmem lossis ntau dua hauv online dyne- cov neeg sim siv los xyuas kom meej tias lub zog saum npoo yog nyob rau hauv qhov kev pom zoo, uas feem ntau yog 6-10 dynes / cm siab tshaj tus number case qhov nro. Cov txheej txheem kev tswj hwm kev sib koom ua ke tuaj yeem txuas lub zog kho kom nrawm nrawm thiab ua kom tsis siv neeg hloov kho kom qib kev kho mob tib yam.
Synergy nrog engraving ntawm lub tog raj kheej
Kev ua tau zoo ntawm kev kho deg rau rotogravure cylinders ua haujlwm zoo tshaj plaws thaum lub tog raj kheej tau sau ua tib zoo. Ib qhov chaw uas tau raug tswj xyuas kom meej cia tus number case tawm ntawm qhov zoo- tsim cov hlwb yam tsis muaj teeb meem. Thaum siv ua ke, lawv ua qhov sib xyaw ua ke zoo tshaj plaws rau kev luam ntawv gravure vim tias lawv muab cov khoom sib sib zog nqus rau koj, qhov ntse tshaj halftones, thiab cov xim ruaj khov tshaj plaws.
Kev xav zaum kawg
Rotogravure printing nto kev kho mob yog ib qho yooj yim txoj kev uas yuav pab ua kom tiav zoo meej luam ntawv luam tawm. Nws yog qhov tseem ceeb tshaj plaws kev sib txuas ntawm lub tog raj kheej complex thiab ib qho nyuaj substrate. Nws ua rau nws ua tau kom tau txais cov xim sib xws uas cov hom thiab cov neeg siv khoom xav tau. Raws li kev lag luam ntim hloov pauv nrog cov ntaub ntawv tshiab thiab lub siab ua kom zoo ib puag ncig, cov thev naus laus zis tshiab xws li atmospheric plasma yuav txuas ntxiv mus ua ntej. Yog tias cov tshuab luam ntawv thiab cov hloov pauv xav ua qhov zoo tshaj plaws ntawm qhov zoo, ceev, thiab xim raug, lawv yuav tsum ua qhov tseem ceeb ua ntej - xovxwm theem yog qhov tseem ceeb tshaj plaws thiab ua kom muaj txiaj ntsig zoo li sai tau. Lub neej yav tom ntej ntawm siab -kawg rotogravure luam ntawv yog nyob ntawm cov tswv yim tshiab thiab ceev faj siv cov kev tshawb fawb saum npoo av.