Qhov tseem ceeb tshaj plaws nyob rau hauv ib qho inverter qhov kev ntsuam xyuas ntawm a Kev kub ceev Ob Xim Flexo Printing Tshuabtsis yog qhov ceev qhia hauv daim ntawv qhia. Tsuas yog nrog kev ceev tiag tiag tuaj yeem ua lub tshuab tsim cov khoom lag luam uas ua tau raws li cov qauv zoo yam tsis ua rau cov khoom pov tseg ntau dhau.
Piv txwv li, thaum luam tawm ntawm 60g / m² ntawv, lub tshuab ntsuas 200m / min khiav zoo ntawm 180m / min. Txawm li cas los xij, ntawm BOPP zaj duab xis ntawm 80 microns siv tib lub tshuab luam ntawv, qhov kev ruaj ntseg tuaj yeem raug txo mus rau 120 m / min.
Yog vim li cas rau qhov sib txawv no yog tias cov ntaub ntawv sib txawv thiab kev ua haujlwm hloov pauv txoj kev luam ntawv ua haujlwm ntawm kev kub ceev. Vim li no, nws yog ib qho tseem ceeb heev kom nkag siab txog lub cev txwv ntawm flexographic luam ntawv nyob rau hauv cov txheej txheem ntau lawm tshaj qhov ntsuas lub cev muaj zog.
Qhov tseeb txhais ntawm "qhov siab tshaj plaws"
Tus lej tseem ceeb tshaj plaws rau txhua tus converter ntsuas aKev kub ceev Ob Xim Flexo Printing Tshuabtsis yog qhov ceev qhia hauv daim ntawv qhia. Tsuas yog nrog kev ceev ntawm kev tsim khoom tiag tiag tuaj yeem ua lub tshuab tsim cov khoom uas ua tau raws li qhov yuav tsum tau ua kom zoo yam tsis muaj kev cuam tshuam ntau dhau.
Qhov tseeb ceev no ib txwm qis dua qhov siab tshaj plaws txhua yam ceev. Qhov siab tshaj plaws nyob rau hauv cov ntaub ntawv technical tsuas tuaj yeem qhia qhov ceev ntawm lub tshuab. Nws yog raws li lub cev muaj zog torque bearing load thiab kev co txwv. Nws tsis sawv cev rau tus nqi ruaj khov ntawm kev tsim khoom.
Qhov tseeb ntau lawm yog nyob ntawm substrate, number case system thiab ziab txoj kev. Cov xwm txheej no hloov pauv lub tshuab coj li cas hauv kev luam ntawv.
Piv txwv li, thaum luam tawm ntawm 60g / m² ntawv, xovxwm ntsuas 200m / min tuaj yeem ua haujlwm ntawm 180m / min. Txawm li cas los xij, thaum luam tawm ntawm BOPP zaj duab xis ntawm 80 microns siv tib lub tshuab luam ntawv, qhov kev ruaj ntseg tuaj yeem poob mus rau 120 m / min.
Raws li qhov tshwm sim ntawm qhov sib txawv no, qhov sib txawv ntawm qhov ntsuas thiab cov nqi tsim khoom tiag tiag tsis raug kho. Nws txawv raws li kev ua haujlwm.
Yog li ntawd, kev txiav txim siab ntawm kev yuav khoom ntawm lub tshuab tsuas yog nyob ntawm qhov kev ntsuas siab tshaj plaws yuav ua rau muaj kev cia siab tsis raug ntawm cov khoom tsim tawm.
Txwv 1: Lub sijhawm ziab ntawm cov chaw nres tsheb
Qhov kev txwv ceev tshaj plaws hauv flexographic luam ntawv yog dryness. Ink yuav tsum tau hloov los ntawm cov kua rau cov khoom ua ntej lub tshuab luam ntawv net kov cov nres tom ntej los yog yob. Offsetting tshwm sim yog tias dryness tsis tiav. Cov ntawv ntub dej txav los ntawm ib txheej ntawm lub nruas mus rau lwm qhov, ua rau nws tsis kam lees.
Rau ntau yam ntawm cov ntawv thiab cov ntawv luam ntawv luam ntawv dej-raws li cov tshuab luam ntawv, tus nqi evaporation yog nyob ntawm qhov kub thiab txias, qhov ceev ntawm cov cua ntws thiab cov kua number case. Raws li qhov loj ntawm lub nruas, ob -xim nruab nrab imprint nruas xovxwm chaw nres tsheb ntawm qhov sib nrug ntawm 300 mm -800 mm. Ntawm 150m / min kab nrawm, 500mm interstation nyob lub sijhawm yog li 0.2 vib nas this. Lub sijhawm no, txawm tias muaj kev pabcuam huab cua kub, cov dej evaporates rau lub sijhawm luv luv.
Cov txiaj ntsig tau pom tias evaporation tus nqi qhia tau hais tias muaj kev sib raug zoo ntawm cov hauv paus plaub hau nrog lub sij hawm nyob rau hauv kev tswj hwm diffusion. Qhov no feem ntau nyob rau hauv flexographic printing. Vim li no, qhov ntev ntawm lub tshuab ziab khaub ncaws ob zaug tsis yog ob npaug. Nws nce kev tso cai nrawm li ntawm 41%. Qhov no piav qhia vim li cas cov tshuab ziab khaub ncaws ntev dua tawm los ntawm kev nrawm dua.
UV number case system tsis nyob ntawm evaporation. Lawv kho los ntawm radical polymerization es tsis hnyav poob. UV teeb qhov system tuaj yeem kho tus cwj mem hauv 0.05-0.10 vib nas this. Qhov no tshem tawm qhov kev txwv ntawm dryness thiab ncav cuag lub siab ntawm mechanical limits. UV systems tseem muaj lawv cov kev txwv. Lub zog ntawm lub teeb yuav tsum sib npaug ntawm qhov dav ntawm lub vas thiab ntsuas siv ISO 21377-1: 2020 radiometry txoj kev. Qee cov substrates tsis tuaj yeem tiv thaiv UV tshav kub lossis UV raug. Thaum lub zog siab dhau lawm, lawv tuaj yeem tig daj lossis degrade.
Kev txwv 2: Kev sau npe nrawm nrawm
Nrog rau qhov nce ntawm kev ceev, kev sau npe raug ntawm cov chaw nres tsheb xim kuj tseem tuaj yeem tshwm sim. Cov txheej txheem tswj kev kaw - lub voj voog sau npe muaj sijhawm tsawg dua rau kev tshawb pom qhov yuam kev, kev suav kho thiab hloov kho daim ntawv thov. Cov nyhuv no yog pom zoo tshaj plaws ntawm aKev kub ceev Ob Xim Flexo Printing Tshuabnias thaum pib acceleration. Nws kuj tshwm sim thaum lub vev xaib nro cuam tshuam nrog kev nthuav tawm lossis rov qab ntawm cov txheej txheem.
Qhov tseem ceeb ntawm qhov system no yog kev sib raug zoo ntawm servo lub voj voog ceev thiab kev cuam tshuam zaus. Qhov kev hloov ntawm qhov nro ntawm lub reel yog tshwm sim los ntawm qhov tsis sib xws ntawm kev nthuav dav ntawm lub reel, qhov ceev ntawm lub reel thiab lub reel nws tus kheej. Thaum lub tshuab qis qis, qhov cuam tshuam qeeb. Lub servo system tuaj yeem ntes thiab kho nws kom txaus.
Thaum muaj kev nrawm dua, qhov cuam tshuam ntau zaus nce. Thaum nws mus txog qhov kev txwv servo, feem ntau yog 3-5 hertz hauv cov txheej txheem flexo, cov kev tswj xyuas ua haujlwm lig. Qhov ncua sij hawm no ua rau muaj pes tsawg tus seem uas tsis raug. Qhov yuam kev tau rov ua dua thoob plaws hauv qhov chaw luam tawm.
ISO 12647-6: 2012 teeb tsa qhov kev txwv ntawm ± 0.10 hli rau kev tso npe ntawm cov ntawv luam tawm flexographic zoo. Ua kom qhov tseeb ntawm 150-200m / min yuav tsum muaj cov tshuab servo sai dua lossis kev tswj hwm lub vev xaib kom zoo dua nyob rau theem tso tawm. Ob qho kev xaiv nce nqi lossis xav tau kev hloov khoom dua tshiab. Cov kev hloov no tsis nce lub tshuab ntsuas nrawm, tab sis lawv cuam tshuam rau qhov tseeb ruaj khov ceev ntawm kev sau npe ua haujlwm.
Txoj Cai 3: Coupling ntawm Substrate Properties thiab tshaj tawm
Txawm tias muaj cov tshuab, cov substrates sib txawv tuaj yeem txwv kev luam ntawv ceev. Cov khoom tseem ceeb yog qhov loj stability. Qhov no txhais tau hais tias ntau npaum li cas cov khoom yog stretched nyob rau hauv nro nyob rau hauv lub luam thiab yuav ua li cas nws rov qab thaum lub nro raug tshem tawm.
Cov ntaub ntawv ntawv muaj viscoelastic cwj pwm zoo. Thaum nias, lawv ncab thiab ib nrab rov qab los ntawm lub sijhawm. Cov ntaub ntawv hnyav (350+ g / m²) muaj qhov elongation qis dua li daim ntawv lub teeb thiab yog li ruaj khov ntawm qhov nrawm dua. Txawm li cas los xij, cov ntawv hnyav dua yuav ua rau lub nra hnyav ntawm lub tog raj kheej kheej kheej. Kev hloov tus cwj mem yuav tsum muaj siab. Qhov no tuaj yeem ua rau qhov hnav thiab tsim kua muag ntawm lub phaj thiab ua rau muaj kev hloov pauv hauv qhov me me thaum lub sijhawm ua haujlwm ntev -.
Cov khoom ntawm PE, BOPP thiab PET yog txawv. Lawv ncab yooj yim dua hauv cov xwm txheej ntxhov siab. Tab sis lawv yuav rov qab sai sai, yog tias tsis overextended. Qhov no txhais tau hais tias yog tias qhov nro tswj tau me me, BOPP zaj duab xis tuaj yeem ua haujlwm ntawm kev kub ceev. Yog tias qhov nro qis dhau, lub network tsis ruaj khov. Yog tias nruj heev, cov yeeb yaj kiab tuaj yeem ncab mus tas li. Qhov ntau yam no ua nyuaj rau kev tswj ntawm qhov nrawm dua vim tias kev vibrations los ntawm cov khoom siv tshuab cuam tshuam rau ntau nplooj ntawv web.
TAPPI T 494 om-92 thiab ASTM D882 yog cov qauv kev sim ntsuas ntsuas lub zog tensile thiab elongation. Cov txiaj ntsig no qhia seb lub substrate puas tuaj yeem tuav lub hom phiaj luam ntawv nrawm yam tsis muaj kev puas tsuaj. Cov ntaub ntawv no yuav tsum tau siv ua ntej kev tsim khoom los txiav txim siab ua haujlwm ceev.
Constraint 4: Anilox Roll Transfer Physics
Lub anilox yob yog lub tog raj kheej ceramic nrog ib chav tsev rau kev tswj qhov ntim ntawm cov ntawv luam ntawv phaj number case. Nws txav ntawm tib qhov chaw ceev raws li kab laug sab web tsuas yog thaum lub tswv yim taw tes tsis swb. Hauv kev tsim khoom tiag tiag, yeej ib txwm ua yuam kev. Lub phaj photopolymer khoov me ntsis nyob rau hauv siab. Qhov no tsim qhov sib txawv me me ntawm qhov chaw ntawm aniline oxidase thiab qhov chaw ntawm lub phaj nto. Qhov sib txawv no hloov pauv tus cwj mem. Nws nyob ntawm siab, phaj hardness thiab kab ceev.
Thaum muaj kev nrawm dua, ob qhov teeb meem tseem ceeb tshwm sim.
Ua ntej tuaj inkjet. Tus cwj mem txuas ntawm lub roj teeb thiab lub phaj yuav tsis ruaj khov thaum lub roj teeb phenytoin tawm ntawm qhov chaw sib cuag ntawm kev kub ceev. Qhov no tuaj yeem tawg ua cov tee dej. Cov dej ntws tawm sab nraud ntawm thaj chaw duab. Qhov kev pheej hmoo nce nrawm nrawm nrawm. Qhov no muaj ntau yam ua rau qhov nrawm nrawm ntawm lub voos xwmfab. Qhov no ua rau ceev yog qhov tseem ceeb hauv kev tsim txaws. Viscosity ntawm tus number case siab tuaj yeem txo qhov txaws, tab sis kuj txo tus number case los ntawm kev hloov cov hlwb zoo anilox. Qhov no tsim kev lag luam - tawm ntawm kev nrawm thiab cov duab nthuav dav.
Qhov teeb meem thib ob yog kab noj hniav. Txhua lub xov tooj ntawm tes anilox yuav tsum tso tag nrho cov cwj mem nyob rau hauv kev sib cuag nrog lub phaj hauv lub sijhawm luv luv. Thaum ceev dua, lub sij hawm tiv tauj no yuav luv dua. Tus number case ntws tawm ntawm lub roj teeb hauv lub sijhawm tsawg. Qee tus cwj mem tseem nyob hauv kab noj hniav.
Kev tshawb fawb kev kawm hauv Organic Coatings tau pom tias tsis tiav qhov khoob tuaj yeem txo tus lej hloov ntawm 5% mus rau 15% ntawm qhov nrawm ntawm ntau dua 150 m / min. Cov txiaj ntsig tshwj xeeb nyob ntawm lub roj teeb zoo, qhov tob thiab tus cwj mem. Qhov no txhais tau hais tias tib tus cwj mem thiab anilox teeb tuaj yeem luam cov khoom sib zog ntawm 180m / min tshaj li ntawm 100m / min ntawm ib qhoKev kub ceev Ob Xim Flexo Printing Tshuab. Yuav tsum tau kho lub siab los yog number case viscosity los kho qhov kev hloov no.
Dab tsi ceev cov lej txhais tau tias
Ua raws li cov kev txwv ntawm cov kev sib cuam tshuam no, nyob rau hauv cov xwm txheej ntau lawm, qhov kev cia siab tiag tiag ntawm ob - xim hloov luam ntawv xovxwm yog raws li hauv qab no:
| Matrix | Ink system | Hom loj -Speed txwv | Qhov Tseem Ceeb Limiting Factor |
|---|---|---|---|
| 60-80 g / m² kraft ntawv | Dej -raws li | 100-130m / min | Chaw nres tsheb kom qhuav |
| 120-200 g / m² coated ntawv | Dej -raws li | 140-170 m / min | Kev sau npe dynamics / dryness |
| 250-400 g / m² foldable cardboard thawv | UV kho | 160-200 m / min | Phaj hnav thiab tsim kua muag nyob rau hauv siab nip quab yuam |
| 40-80 μm PE zaj duab xis | Solvent/UV | 150-190 m / min | Web nro stability |
| POB 20-30 μm | UV kho | 180-220 m / min | Ink hloov / kab noj hniav |
Cov nuj nqis yog los ntawm kev lag luam zoo ib yam. Lawv ua raws li cov ntaub ntawv los ntawm cov cuab yeej tsim khoom thiab cov txheej txheem kev tshawb fawb ywj pheej. Lawv tsis muaj ntau npaum li lawv tuaj yeem ua tau.
Qhov qis kawg ntawm txhua lub caij sib tw ua haujlwm nyuaj. Cov hauj lwm no yuav tsum muaj cov ntawv luam loj loj, kev sib dhos nruj, thiab cov xim hom xim. Siab - kawg qhov sib tw rau txhua txoj haujlwm tau yooj yim. Cov hauj lwm no xav tau cov chaw luam ntawv me me thiab ua rau xoob.
Kev ntsuas thiab saib xyuas Ceev -Txoj Kev Zoo
Txoj hauv kev zoo tshaj plaws los nrhiav qhov kev txwv ceev tiag tiag rau txoj haujlwm yog khiav ib kauj ruam ramp thaum lub sijhawm teeb tsa. Pib qeeb. Tom qab ntawd nws nce ntawm tus nqi ntawm 10-20 meters ib feeb. At each step, check registration errors, solid ink density and drying quality using inline tools. Ib qho taw tes saum nws qhov kev tso cai txwv yog qhov siab tshaj plaws ntawm txoj haujlwm tuaj yeem ua tiav. Qhov kev ceev no tuaj yeem sib txawv ntawm qhov siab tshaj plaws ntsuas ntawm lub tshuab, lossis tus neeg teb xov tooj tuaj yeem xav raws li kev ua haujlwm dhau los.
Inline scanning densitometers (raws li ISO 2846-1 txoj cai nruj), tsis siv neeg pom cov tshuab rau kev sau npe kos thiab pinhole ntes cov koob yees duab muab cov lus teb rau lub sijhawm. Nyob rau hauv txoj kev no, cov neeg ua haujlwm tuaj yeem tau los ze zog rau lub hau zoo dua yooj yim dua. Yog tsis muaj cov cuab yeej no, cov neeg ua haujlwm feem ntau khaws qhov kev nyab xeeb ntawm 15 thiab 25 feem pua hauv qab qhov kev txwv. Lawv ua qhov no kom tsis txhob tsim qhov tsis zoo. Cov npoo kev nyab xeeb no txhais ncaj qha rau hauv kev tsim khoom ploj.
Xaus
Qhov siab tshaj plaws ceev ntawm aKev kub ceev Ob Xim Flexo Printing Tshuabtsis yog tus lej tas rau ntawm daim ntawv teev npe. Nws yog lub rooj sib tham ntawm dryness, sau npe txav, substrate steadiness thiab anilox number case hloov. Tag nrho cov no yog sim los ntawm cov qauv zoo meej. Kev ntsuam xyuas qhia tau hais tias muaj peev xwm theoretical ntawm lub tshuab. Qhov tseeb ceev koj tuaj yeem tau txais yog nyob ntawm seb cov kev txwv no cuam tshuam li cas rau koj cov khoom tshwj xeeb thiab kev xav tau haujlwm. Paub txog cov kev txwv twg yog qhov tseem ceeb tshaj plaws rau txhua txoj haujlwm tso cai rau cov neeg ua haujlwm tshuab ua kom paub txog kev xaiv cov khoom siv, npaj txoj haujlwm thiab txhim kho cov txheej txheem. Qhov ntawd yog li cas koj tau txais qhov tseeb tshaj tawm. Lawv tsis nkim sij hawm mus nrhiav kev ceev tshaj plaws uas cov txheej txheem lub cev tsis tuaj yeem txhawb nqa, es tsis yog qhov theoretical speeds uas cov txheej txheem lub cev tsis tuaj yeem txhawb nqa.
Kev siv
- TS EN ISO 12647 Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Zoo Printing Techniques-Kev tswj cov txheej txheem rau ib nrab-Tone Colour Separations, proofreading, and printing processes-Part 6: Flexographic Printing. International Organization for Standardization, 2012. (Kev tso npe kam rau ua ± 0.10 mm specification, suab nrov nce nqi tswj lub moj khaum, pawg pawg pawg)
- TS EN ISO 2846 1: 2017. Xim thiab pob tshab ntawm Graphic Arts Inks-Part 1: Sheet-Fed thiab web offset printing inks. International Organization for Standardization, 2017. (Solid optical density uniformity specification, threshold for acceptable deviation, reference standard for inline densitometers)
- TS EN ISO 21377 Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Kev Tswj Xyuas Zoo Graphic technology-Radiometric Measurement of solidified Curing Radiation Intensity-Part 1: Cov ntsiab lus dav dav. International Organization for Standardization, 2020. (UV curing intensity uniformity measurement methodology, distribution of light in web width)
- TAPPI T 494-om-92. Tensile Breaking Properties ntawm daim ntawv thiab cardboard. Technical Association ntawm Pulp thiab Ntawv Kev Lag Luam, 1992. (Paper tensile zog, tawg elongation, tshaj tawm coupling tsom xam modulus xam)
- ASTM D882-18 (2022). Txuj kev xeem rau Tensile Properties ntawm nyias yas zaj duab xis. ASTM International, 2022. (Thin film substrate tensile testing, elasticity vs. plastic deformation behavior, modulus and elongation data for web shutters)
