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Syväpainatus



Introduction

Gravureprinting,referredtoasgravureprinting,isoneofthefourprintingmethods.Gravureprintingisadirectprintingmethodthatdirectlyimprintstheinkcontainedinthegravurepitsontothesubstrate.Theshadeoftheprintedpictureisdeterminedbythesizeanddepthofthepits.Ifthepitsaredeeper,Itcontainsmoreink,andtheinklayerleftonthesubstrateafterembossingisthicker;onthecontrary,ifthepitsareshallower,theamountofinkcontainedisless,andtheinklayerleftonthesubstrateafterembossingIt'sthinner.Theprintingplateofgravureprintingiscomposedofpitscorrespondingtotheoriginalimageandtextandthesurfaceoftheprintingplate.Duringprinting,theinkisfilledintothepits,andtheinkonthesurfaceoftheprintingplateisscrapedoffwithasqueegee.Thereisacertainpressurecontactbetweentheprintingplateandthesubstrate,andtheinkinthepitsistransferredtothesubstratetocompletetheprinting.Gravureprinting,asakindofprintingprocess,hastheadvantagesofthickinklayer,brightcolor,highsaturation,highprintingplatedurability,stableprintingquality,fastprintingspeedandotheradvantagesinprintingpackagingandgraphicpublishing.Occupyanextremelyimportantposition.Fromtheperspectiveofapplication,inforeigncountries,gravureprintingismainlyusedforfinepublicationssuchasmagazinesandproductcatalogs,packagingprintingandprintingofsecuritiessuchasbanknotesandstamps,anditisalsousedinspecialfieldssuchasdecorativematerials;inChina,gravureprintingPrintingismainlyusedforflexiblepackagingprinting.Withthedevelopmentofdomesticgravureprintingtechnology,ithasalsobeenwidelyusedinpaperpackaging,woodgraindecoration,leathermaterials,andpharmaceuticalpackaging.Ofcourse,gravureprintingalsohasitslimitations.Itsmaindisadvantagesare:complexpre-pressplate-makingtechnology,longcycle,highplate-makingcost;duetotheuseofvolatilesolvents,thehighcontentofharmfulgasesintheworkshopwillcausegreaterdamagetothehealthofworkers;gravureprintingPractitionersrequirerelativelyhighremuneration.

Developmenthistory

Oneofthebasicprintingmethods.Thegraphicsandtextoftheprintingplatearelowerthantheblankpart,andthewholepageisinkedwhenprinting,andthenthelayoutiswiped,sothatonlytheinkisleftinthegraphicsandtextpart,whichistransferredtothesubstrateandbecomesaprintedmatter.Itcanbedividedintothreetypes:engravingintaglio,photo-etchingintaglioandelectronicengraving.

Engravingintaglioisdevelopedfromtheartofprintmaking.Itwasinventedin1452bytheItaliangoldandsilversmithM.Finiguela.Atfirstitwasallhand-carved,butlateritwaschemicallyetched.Inmoderntimes,machineryhasbeenusedasmuchaspossible.Thelayoutiscomposedofpointsandlinesofdifferentdepthandthickness.Thelinesoftheprintedmatterareslightlyconvex,cleanandclear,andanti-counterfeiting,soitismostlyusedforprintingbanknotes,stampsandothervaluablesecurities.

PhotographiccorrosionintaglioInthelate19thcentury,thepainterK.Klick,whowasborninBohemia,usedhispredecessor'sphotographyandcarbonpaperprintingtoinventthephotogravureandtheintagliowithascraper.Printingmethod.Theinkedpartofthegraphiconthepageisaregulararrangementofsmallholes(cells),whicharegenerallysquareinshapeandthesamesize,butwithdifferentshadesanddifferentinkcapacities.Itsprintedmatterhasthickinkandcanachieveaprintingeffectthatiscompletelyconsistentwiththetoneleveloftheoriginalimage.Itisthemostcommontypeofgravureprinting,soitisalsocalledtraditionalgravure.Formorethanhalfacentury,severalnewphoto-corrosiveintaglioplateshavebeendeveloped.Forexample,referringtotheoffsetprintingdotstructure,theinkingholesaredifferentinsize,butthedepthisthesameorinconsistent,andtheprintingqualityisbetter.

Inthemiddleofthe20thcentury,electronicengravingofintaglioengravingmachinesbegantohaveintaglioelectronicengravingmachines.Itusesascanningheadandacomputer-controlleddiamondcuttertoengravepicturesandtextsonthedrum.Theinkingholesareintheshapeofaninvertedpyramid.Therearechangesindepth.Itsprintingqualityisnolessthanthatofphoto-corrosiongravure,andithastheadvantagesofsimpleoperation,shortplate-makingtime,andnowasteliquiddisposalproblems.

Moderngravureprintingplatesaremostlymadeonthesurfaceofaroundcylinder,andtheprintingmethodofroundpressingisadopted.Usuallytheimpressioncylinderisontopandtheplatecylinderisonthebottom.Thelowerpartoftheprintingplatecylinderisimmersedintheinktank,andtheplatesurfacegetsinkfromthetank(itisalsousedtoejectinkfromaninkpumportransferinktotheplatesurfacebyaninkrollerimmersedintheinktank).Athinsteelscraperisplacedabovetheinktanktopressonthesurfaceoftheplatecylindertoscrapeofftheinkontheplatesurfacewithoutgraphics(itcanalsobewipedwithacounter-rotatingwiperroller).Theinkremainingintheinkholes(orlines)ofthegraphicandtextonthelayoutistransferredtothepaper(plasticfilm,aluminumfoil,etc.)passingthroughwhenitistransferredtothetangentpointofthetwocylinders,andthegraphicandtextareprinted.

Comparedwithoffsetprintingorcopperplateembossingwhencopyingmonochromeorcolorphotographs,ithasthickinklayer,richlayers,goodprintingquality,lowwastepaperrate,printingplatedurability,long-termstorage,etc.Advantages,especiallygoodprintingeffectoncoarsepaper,cellophane,plasticfilmandmetalfoil.However,gravureprintingtakesalongtimeandhighcost,soonlycolorpictures,picturealbums,magazines,bookillustrations,postcards,trademarks,packaginganddecoration,securities,buildingdecorationmaterials,etc.withhighqualityrequirementsaresuitableforgravureprinting.Moreover,thenumberofprintedproductsislarge,sogravureprintingismorecost-effective.Inaddition,thequalityofprintedsmalltextisnotgood,sogravureprintingisnotrequiredfortext-basedbooksandperiodicals.

Becausethegravureinkmusteasilyentertheinkingholesoftheprintingplateandtransfertothepaper,ithasgoodfluidity,andvolatilebenzenesarecommonlyusedassolvents.Inordertopreventsolventsfrompollutingtheairandpreventingfires,attentionmustbepaidtosealingoffallsourcesofpollution,recoveringsolvents,andventilatingtheworkplace.Theresearchandapplicationofwater-basedgravureinksthatrequirenodegradationofprintingqualityareactivelybeingexploredathomeandabroad.

Tyypit

Syväpainatustyypit on jaettu kahteen tyyppiin levynvalmistusmenetelmän mukaan: kaiverrus ja syvennys.

Engravingintaglio

Engravingintaglioistodirectlyengravethepitscorrespondingtotheoriginalimageandtextonthesurfaceoftheprintingplatecylinderwithacutter.Accordingtothecontrolmethodofthecutter,itcanbedividedintoHand-engravedintaglio,mechanicalengravedintaglioandelectronicengravedintaglio.

(1)Käsin kaiverrettu syvennys

Hand-engravedintaglioismadebytechniciansusingacarvingknifetohand-engravethesurfaceoftheprintingplatecylinderaccordingtotheoriginalgraphicsandtext.TheprintingplatematerialsareavailableCopperorsteelplate.Themanuallaborisheavy,theplate-makingcostislarge,andthecycleislong.However,thehand-engravedintagliohasclearlines,andtheprintedmatterhasastrongsenseoflayeringandisdifficulttoforge.Mostlyusedtoproduceprintedintaglioplatesforsecuritiesandhigh-qualityartworks.

(2)Mekaaninen kaiverrusmusiikki

Mechanicalengravingintaglioismadebyengravingonthesurfaceoftheprintingplatecylinderwithamechanicallycontrolledcutter,whichreducestheheavylaborofmanualengraving,andmakestheplateThespeedisfast,thecycleisshorter,andtheplate-makingcostisalsolower.Mainlyusedtoproduceprintedintaglioplatesforsecurities.

Becauseofthehighcostoftheabovetwotypesofengravingandplate-making,theplate-makingcycleislong,sothescopeofuseislimited.Butthingsaredividedintotwoparts.Asfarasanti-counterfeitingpackagingisconcerned,hand-engravingintagliomaybethebestmethodofplatemaking.Becausesecretanti-counterfeitingisoneofthemainmethodsofanti-counterfeitingpackaging,technicianscanusevariousmethodstoengravesomesecretmarksduringtheprocessofhand-engravingtheintaglio.Thesesecretmarksonthehand-engravedintaglioarenoteasytobefound,anditismoredifficulttodistinguishthemontheprintedmatter.,Whichformsthesecretofanti-counterfeiting.

(3)Sähköinen kaiverrusmusiikki

Thiskindofplateisengravedonthesurfaceoftheprintingplatecylinderbytheelectroniccontroldevicetocontrolthecarvingknife.Usingtheelectronicengravingmachine,accordingtothephotoelectricprinciple,theengravingknifeiscontrolledtoengravethemeshonthesurfaceofthedrum,andtheareaanddepthofthemesharechangedatthesametime.

Corrodedintaglio

Thecorrodedintaglioismadebyetchinginkpitsonthesurfaceoftheplatecylinderbychemicaletchingaccordingtotheoriginalgraphicsandtext.Accordingtothedifferentmethodsofmanuscriptimageandtextconversion,thecorrosionintagliocanbedividedintoetchingintaglio,photointaglio,anddotintaglio.

Theetchingintaglioismadebyaplate-makingmethodthatcombinesengravingandetching.Thatis,theshapeoftheoriginalimageandtextisfirsthand-carved,andthentheintaglioismadebytheetchingmethod.

Photogravureiswidelyused,andisthemostwidelyusedprintingplateingravureprinting,mainlyusedforprintingpictures.

Dotgravureismainlyusedforpackaginganddecorationprintingandbuildingmaterialsprinting.

Tuotantotekijät

Käsikirjoitukset

Syvennyskäsikirjoitukset ovat enimmäkseen jatkuvaa kiveä.

Ink

Gravureprintinginkiscomposedofsolidresin,volatilesolvents,pigments,fillersandadditives.Itdoesnotcontainvegetableoil,andmostofitsdryingmethodsarevolatile.Gravureprintinginkscanbedividedintothreetypes:photocopyinggravureprintinginks;plasticgravureprintinginks;alcohol-solublegravureprintinginks.Theroleofthesolventintheinkis:dissolvingordispersingallsolidcomponentsintheink;wettingthesurfaceofthesubstratetobeprinted;adjustingthedryingspeedoftheink;adjustingtheconsistencyoftheinktomakeitsuitablefortheinkingrequirementsoftheprintingplate.

Theprintingplate

Asignificantdifferencebetweentheintaglioplateandotherplatesisthatthegraphicpartiscomposedofconcaveholeslowerthanthenon-graphicpart,andtheprintingplateismadeofmetalmaterials.Itisfinishedwithchromeandcopperplatedontheoutside.

Substraatti

Syväpainatuksen materiaali voi olla hyvin leveä, mutta sitä voidaan pehmentää korkealaatuisen paperin ja muovikalvon tulostamiseen.

Tulostuskoneet

Syväpainokone koostuu tavallisesti kahdesta osasta, mukaan lukien kelausosa, ohjaustela, painerulla, painotela, musteosa, kaavinterä, kuivausrumpu, vastaanottava tilavuusosa, syväpainokoneen osa, joka sisältää myös virtajärjestelmän.

Productionprocess

Becauseofthehighdegreeofautomationoftheprintingmachineandthehighqualityofplatemaking,theprocessoperationofgravureprintingissimplerthanthatoflithographicprintingandeasytomaster.Theprocessflowisasfollows:

Painamista edeltävä valmistelu→ Pre-press→ Säätösäännöt→ Muodollinen painatus→ Jälkikäsittely

Esivalmistelut

Syväpainatuksen valmistelutyöhön sisältyy:tulostukseen valmistautuminen rakennearkin vaatimusten mukaisesti.Tämä on tarpeen painokoneen voitelemiseksi materiaaleilla, musteella, vetolastalla jne.

Plasticfilmisthemainsubstrateforgravureprinting.Commonlyusedplasticfilmsarepolyethylene,polypropylene,polyvinylchlorideandsoon.Becausetheplasticfilmhasasmoothsurfaceandpoorinkadhesion,thesurfaceofthefilmmustbetreatedbeforeprinting.Coronatreatmentisgenerallyused.Thismethodistopasstheplasticfilmthroughtwoelectrodes,andusehigh-frequencyoscillatingpulsestoforcetheairtoionizetoproduceadischargephenomenontoformacorona.Freeoxygenatomscombinewithoxygenmoleculestogenerateozoneandformthesurfaceofthefilm.Somestronggroupsand"burrs"thatareinvisibletothenakedeyewillincreasethesurfacetensionandroughnessofthefilm,whichisconducivetotheadhesionofinkandadhesive.

Syväpainatus, käyttäen liuotinta haihtuvaa meinkiä, alhaista viskositeettia, hyvää juoksevuutta ja vahvaa tarttuvuutta. Yleisesti käytetyt liuottimet ovat retolueeni, ksyleeni, bensiini, alkoholi jne. Lisää sopiva määrä liuotinta mekaan ennen tulostusta, ja se on paras suodatin ennen käyttöä.

Themainfeatureofthegravureprintingmachineistheuseofasqueegeetoscrapeofftheinkintheblankpartoftheprintingplate.Thesqueegeeisaspecialsteelsheetwithawidthof60mmto80mmandalengthof1000mmto1500mm(dependingonthesizeoftheprintingplatecylinder).Thesqueegeeblademustbeinastraightline.Ifthereisa"smallcrescent"scar,awideobliquelinewillappearontheprintedsheet,thatis,thephenomenonofemptybarswilloccur.

Theprintingplateisthebasisofprinting,anditisdirectlyrelatedtotheprintingquality.Theprintingplateneedstobereviewedbeforetheprinting.Checkwhetherthedotsareneatandcomplete,whetherthechrome-platedprintingplatehasde-chromiumphenomenon,andthetextprintingplaterequirescompletelinesandnobrokenpensandlesslines.Theprintingplatecanbeinstalledontheprintingpressonlyafterdetailedinspection.

Upgrade

Duringtheoperationofprintingplate,payspecialattentiontoprotectthelayoutfrombeingscratched,alignthegrippingrulesandpush-pullrules,andalsoaligntheprintingplate.Thecylinderisfastenedontheprintingmachinetopreventtheplatecylinderfromlooseningduringformalprinting.

Säätösäännöt

Kun tulostusta edeltävät valmistelut on suoritettu, kalibroi tulostuslevy huolellisesti, tarkista paperinsyöttö, paperinsyöttö, paperin syöttö ja työntösäännöt ja tee sopivat säädöt.

Theadjustmentofthesqueegeeismainlytoadjustthedistancebetweenthesqueegeeandtheprintingplateandtheangleofthesqueegee,sothatthepressureofthesqueegeeonthelayoutisevenwithoutdamagingtheprintingplate.

Muodollinen painatus

Muodollisen painatusprosessin aikana sinun tulee tarkistaa, ovatko pisteet ehjät, onko ylipainatus tarkka, ovatko värit kirkkaita, onko värin viskositeetti ja kuivuminen yhdenmukaisia ​​tulostusnopeuden kanssa. s,brokenedges jne.painetulla arkilla.

Theworksiteofgravureprintingshouldhavegoodventilationequipmenttoeliminateharmfulgases,andsolventrecoveryequipmentshouldbeused.Theelectricalappliancesontheprintingpressmusthaveexplosion-proofdevices,andtheymustbecheckedandrepairedfrequentlytoavoidfire.

Features

Theinkcarrieringravureprintingisthepitsengravedontheprintingplate.Theshapeofthepitsisexactlythesameastheoriginalimageandtext.Thereisnoinkonthesurfaceoftheprintingplate.Whentheprintingplateisincontactwiththesubstrate,theinkinthepitistransferredtothesurfaceofthesubstratetocompletetheprintingprocess.Therefore,gravureprintinghassomeuniquecharacteristicsthataredifferentfromotherprintingmethods,whicharediscussedseparatelybelow.

Anti-counterfeiting

Gravureprintingusespitscarvedaccordingtotheoriginalgraphicstocarryink.Thethicknessofthelinesandtheintensityoftheinkcanbearbitrarilycontrolledduringengraving,whichisnoteasytobeimitatedandForgery,especiallythedepthoftheinkpit,isveryunlikelytoberealisticallyengravedaccordingtotheprintedgraphics.Therefore,currentsecuritiessuchasbanknotes,stamps,stocks,etc.aregenerallyprintedwithgravure,whichhasagoodanti-counterfeitingeffect.Atpresent,somecompanies'trademarksandevenpackaginganddecorationhaveconsciouslyadoptedgravureprinting,whichshowsthatgravureprintingisamorevigorousanti-counterfeitingprintingmethod.

Laaja valikoima

Yleisiä ohjelmistomateriaaleja voidaan käyttää syväpainatuksen alustana. Kuten muovi, paperi, alumiinifolio jne., erityisesti joillekin materiaaleille, jotka ovat helposti venyviä ja muotoutuvia, kuten tekstiilimateriaaleja jne., jotka ovat paremmin sopeutumattomia ja painettuina.

Korkea tulostuslaatu

Syväpainatuksessa käytetään paljon mustetta, grafiikka ja teksti ovat kuperia, ja kerrokset ovat rikkaita, linjat ovat selkeitä jalaatukorkea. Suurin osa kirjojen, aikakauslehtien, aikakauslehtien, pakkausten ja koristeiden painamisesta on syväpainoa.

Massprinting

Gravureprintinghasalongplate-makingcycle,highefficiencyandhighcost.Buttheprintingplateisdurable,soitissuitableformassprinting.Thelargerthebatch,thehigherthebenefit,andthelowerthebenefitforprintingwithsmallerbatches.Therefore,thegravuremethodisnotsuitablefortheprintingofsmallbatchesoftrademarks.

Digitalplatemaking

Accordingtothecurrentdomesticactualsituation,therearethreemethodsfordigitalplatemakingofgravure:electronicengravingmachinemethod,laserengravingandpost-corrosionprocessingmethod,andlaseralloyelectroplatingDirectablationmethod.

Elektroninen kaiverruskonemenetelmä

Electronicengravingmachineisaprecisionmachinewithhighqualitystabilityapplyingmoderntechnologysuchasintegratedautomationcontrol.Allproductiondataofelectriccarvingiscollectedindigitalform,whichcanbeusedinsubsequentjobswithstrongreliability.Themanuscriptbecomesadigitalsignalfromthebeginningofbeingscannedandsenttothesoftwareforcolorseparationandthentransmittedtotheelectricengravingmachineorcolorproofingmachine,whichisverybeneficialtothestandardizationandstandardizationoftheproductionprocess,therebyensuringthequalityoftheprintedmatter.Moreover,theelectricengravingworkstationusesTIFFgraphicdatatotransfer,anditiseasilyintegratedandsettheworkingparameterconfigurationthroughtheHelioLightassemblyworkstation.Theengravingsoftwaregeneratestheelectro-engravingcurve,recordstheelectro-engravingparametersanddisplaystheengravingstatus,untiltheCDisburnedtosavethefile.(Convenientformultipleuseandrevision).

Theelectriccarvingcraftisrelativelymature,thecontrolissimple,andthelevelsarerestoredtolife.Thedisadvantageisthattheamountofinkappliedonthespotislimited,andtheinklayerhasinsufficienthidingpowerforsomeroughsubstrates;duetothepartitionbetweenthemechanicallyengravedmeshandthemesh,theedgeofthelinecomposedofthemeshisinevitablyjagged.,Whenprinting,smalltextisnotclearandeasytobreakorpaste.However,HaierofGermanyrecentlylaunchedXtremeengravingtechnology,whichcanreproducethemostsubtlepartsveryfinelyatascreencountofupto400lines/cm.Thefinetextcanindependentlyselecttherecordingresolutionwithoutrelyingonthenumberofengravingscreenlines.ThroughoptimizationTheinkflowsmoothesthecontoursandproducescontourlines.Itcannotonlyrealizeregularoutlets,butalsorealizeFMscreeningandcopying.

Laserkaiverrus ja jälkietsausprosessi

Laserengravingandpost-etchingprocessisanotheradvanceddigitalplatemakingmethodafterelectro-engraving.Itisacceptedthroughinterfacelikeelectro-engravingTheimagefileprocessedbycolorseparationissenttothelasermodulator.Thelaseractsontheprotectivelayerpre-coatedonthesurfaceofthedrumtoexposethecopperorironbottom,andthenformsonthedrumafterdifferentperiodsofcorrosion.Dotpitsofdifferentsizes.

Thelaserengravingprocessovercomestheweaknessofelectro-engravedtextandthinlines,hairyandweakhair,andhighlightsthecharacteristicsofhighinkcontent,thickcolor,clearwriting,anddurability.Itissimilartotraditionalphotogravureplatemaking.Italsohastheadvantagesofhighscreenaccuracy,arbitraryeditingofthenetworkshape,andnoseams.Itissuitableforprintingplateswithparticularlysmallbuthighdefinitionrequirementssuchascigaretteprintingandanti-counterfeitingprinting.Itiswidelyusedinhigh-precisionanti-counterfeitingprintingsuchascurrency,securities,andticketing,aswellashigh-endtobaccoandalcoholpackaging.Itisproducedonfineembossingrollersandrubbercoatingrollers.Therearemoreadvantagesintheprocess.

Thereisalsoasensitizerlasermethod,whichusesavioletlasertoexposeandrinsethephotosensitivelayerofthegraphicpart.Theotherprocessesarebasicallythesameasthelaserengravingmethod.

Laserdirectablationofelectroplatedalloyplatemakingmethod

Thewideapplicationoflaserablationtechnologyingravurewillberapidlypopularizedwiththedevelopmentoflasertechnology.Itdoesnotrequiremechanicaladjustmentandfine-tuning.Linesandtextareclearer,anditiseasiertocontrollevelsthancorrosion.Thelatestlaserengravingmachineonthemarketcurrentlyuseshigh-resolutionlasersforfineengravingdirectlyonthesurfaceofthecopperdrum.Thecontour,dotdistributionanddepthoftheengravedinformationcanbearbitrarilychanged,soastoachievetheoutputeffectthatonlylaserimagesetterscouldachievebefore.

Edut ja haitat

①Edut:Noin 90 % ilmeikäsja rikkaat värit. Vahva väritoistuvuus. Vahva sivutoleranssi. Tulosteiden määrä on suuri.

②Haitat: levyjen valmistusmaksu on kallis, tulostusmaksu on myös kallis, levyjen valmistus on monimutkaisempi ja pieni tulosteiden määrä ei sovellu.

Syväpainon sovellusalue

Engravinggravureprinting,becauseofitsexquisitelinesandnoteasytocounterfeit,isusedintheprintingofsecurities,suchasbanknotes,stocks,giftcertificates,Stampsandcommercialcreditcertificatesorstationery,etc.Becauseofitshighcostofplatemakingandprinting,thereareveryfewusersofgeneralprintedmatter.Asforphotogravure,althoughitsplatemakingprocessismorecomplicatedanditscostismoreexpensive,itisnotsuitableforprintingasmallnumberofprints.Itisgenerallyusedinalargenumberofprintedmaterials,suchascolormagazinesandcurrentlypopularbuildingmaterialsprinting,etc.Bothareextremelysuitable.Becausegravureprintingadoptshigh-speedrotarytype,notonlythespeedisfast,buttheinkfilmismuchthickerthanthatofletterpressorlithography.

Control

Inadditiontobooks,newspapers,andmajorprintingpackaginganddecorationmaterials,gravureprintingshouldmeetthefollowingqualityrequirementsaccordingtothecharacteristicsofgravureprinting.

Mustavalkoiset syväpainot, kirkkaat, keskikokoiset ja tummat sävyt ovat hyvin erottuvia, koordinoituja ja herkkiä. Ulostulot ovat selkeitä ja täydellisiä.

Colorintaglioprinting:theimageisbright,mediumanddarktoneswithdistinctlevels,coordinationandfineness.Thecolorisnaturalandharmonious.Theoutletsareclear,complete,andtheangleisaccurate.Theimageoutlineisclear,andtheoverprintingtoleranceisallowed.

Appearanceofprintedmatter:Thelayoutisclean,uniform,withoutobviousstains.Thepositionoftheimageandtextisaccurate.Thecoloroftheprintingplateisbasicallythesame,thesizeerroroffineprintsisnotmorethan0.5mm,thegeneralprintsarenotmorethan1.0mm,andtheoverprinterrorofthefrontandbacksidesisnotmorethan1.0mm.

Tulostuslaadunhallinta

1.Automaattinen päälletulostuslaite

Anautomaticoverprintingdeviceisinstalledonthewebgravureprintingmachine.Thedeviceiscomposedofscanninghead,pulsegenerator,electroniccontroller,regulatingmotor,overprintregulatingrollerandsoon.

Whentheoverprintmarkontheprintedsheetpassesthroughthescanninghead,thepulsesignalissenttotheelectroniccontroller.Iftheoverprintmarkofthesecondcoloriswrongbeforeorafterthemarkofthefirstcolor,thepulsetimewillbeUneven,sotheelectroniccontrollerstartstheadjustmentmotor,sothattheregisteradjustmentrollerbetweenthefirstcolorandthesecondcolorhasaslightmovementtoeliminatetheregistererror.

2.Staattisen sähkön imeytyslaite

Gravureprintingmachinesaregenerallyequippedwithelectrostaticink-absorbingdevices.Thedeviceiscomposedofahigh-voltageadjustablegenerator,analuminumconductiveroller,aspecialimpressioncylinderwithconductivesurfaceandinsulatingbottomlayer,andaprotectionmechanismtoautomaticallycutoffstaticelectricityandovercurrentshort-circuitprotectionwhenthemachinestops.Theuseofstaticelectricitytoadsorbtheinkintheprintingplatecellstothesurfaceofthesubstratecanincreasetheinktransferratebyabout20%,especiallytomakethelevelofthebrightpartoftheprintedmatterrichlyreproduced.

Ongelmia

Syväpainatuksen viat johtuvat pääasiassa tulostuslevyistä, musteista, substraateista, vetolastuista jne.

(1) Musteen värin epätasaisuus

Thephenomenonofperiodicinkcolorchangesonprintedmatter.Theeliminationmethodsare:correcttheroundnessoftheplatecylinder,adjusttheangleandpressureofthesqueegeeorreplacewithanewsqueegee.

(2) Jälki on sumea ja pörröinen

Theimageoftheprintedmatterishierarchicalandfuzzy,andburrsappearontheedgesoftheimageandtext.Eliminationmethodsinclude:removingstaticelectricityonthesurfaceofthesubstrate,addingapolarsolventtotheink,appropriatelyincreasingtheprintingpressure,andadjustingthepositionofthesqueegee.

(3)Estäminen

Thephenomenonthattheinkdriesupinthecellsoftheprintingplate,orthecellsoftheprintingplatearefilledwithpaperwoolorpaperpowder,iscalledblockage.Theeliminationmethodsare:increasethecontentofthesolventintheink,reducethedryingspeedoftheink,andprintonpaperwithhighsurfacestrength.

(4)Inkoverflow

Thephenomenonofspotsonthesolidpartoftheprintedmatter.Theeliminationmethodsare:addhardvarnishtoincreasetheviscosityoftheink.Adjusttheangleofthesqueegee,increasetheprintingspeed,replacethedeep-cellprintingplatewithashallow-cellprintingplate,etc.

(5)Naarmut

Therearetracesofsqueegeeontheprintedmatter.Theexclusionmethodsare:usecleaninkprintingwithnoforeignmattermixedin.Adjusttheviscosity,dryness,andadhesionoftheink.Useahigh-qualitysqueegeetoadjusttheanglebetweenthesqueegeeandtheprintingplate.

(6)Pigmentisaostuminen

Thephenomenonthatthecolorontheprintedmatterbecomeslighter.Theexclusionmethodsare:printingwithinkswithgooddispersibilityandstableperformance.Addanti-cohesionandanti-precipitationadditivestotheink.Fullyrollandstirtheinkintheinktankfrequently.

(7)Likainen

Thereisinkstainontheprintedmatter.Theeliminationmethodsare:chooseprintinginkwithfastvolatilizationspeed,increasethedryingtemperatureorappropriatelyreducetheprintingspeed.

(8)Musteen valuminen

Theadhesionoftheinkprintedontheplasticfilmispoor,anditisaphenomenoninwhichtheinkisrubbedoffbyhandormechanicalforce.Theeliminationmethodsare:preventtheplasticfilmfromgettingdamp,selectinkprintingwithgoodaffinityfortheplasticfilm,andresurfacetheplasticfilmtoincreasethesurfacetension.

Sovellusala

1. Käsin kaiverretun syväpainon väärentämisenestovaikutus on parempi

Thesecretthatanti-counterfeitingisamajoraspectofcommodityanti-counterfeiting,Andthisisimplementedbythetrademark,hand-engravedgravureprintingprovidesthenecessarymeansforit.Hand-engravedgravureprintingiseasytoimplementsecretanti-counterfeitingduringplatemaking.Thedepthofthepitsduringengravingdeterminestheintensityoftheprints.Theimitatorcaneasilyimitatethesizeoftheimageandthethicknessoftheline,butitisdifficulttoimitatetheintensity.Printsofthesamelevel(thatis,thesamedeepinkpit).Thisisthemainreasonwhygravuremustbeusedforsecuritiesforalongtime.

Thelesstheprintvolume,thebettertheanti-counterfeitingeffect.Duetothelongcycleandhighcostofhand-carvingintaglioplates,thepriceofprintedproductsishigherwhentheprintvolumeissmall.Themainpurposeofcounterfeitersistopursueeconomicbenefits.Theyareunwillingtotakeanyriskswhentheyareunprofitableorprofitable.Therefore,itcanbesaidthattheanti-counterfeitingeffectofgravureprintingforsmallbatchesoftrademarksmaybebetterthanthatoflargebatchesofgravureprinting.

2. Levyjen valmistus ja painaminen suoritetaan kahdessa paikassa

Theplate-makingandprintingindifferentplaceshaveagoodanti-counterfeitingeffect.Printinghousesgenerallyhavetheabilitytomakeplates,buttrademark-usingcompaniesshouldchooseadifferentunitforplatemakingwork,becauseoneofthekeytoanti-counterfeitingistoknowthelesspeoplethebetter.Theentireprocessoftrademarkdesignandprinting,sothatevenifthereareloopholesinonelink,otherlinksaresufficienttomeettheneedsofanti-counterfeiting.Whenthetrademarkisprintedintheprintingplant,thecompanymustsendresponsiblepersonneltothesitetosupervisetheprintingtopreventthetheftoftheprintingplateandthetheftofthetrademark.Afterprinting,theprintingplateshouldbetakenbackandstored.

3.Yhdistä väärentämisenestotekniikkaan

Inkanti-counterfeitingtechnologyisalsoanaspectofsecretanti-counterfeiting,combininggravureprintingtechnologywithinkanti-counterfeitingtechnology,Realizethedoublesecretanti-counterfeiting,theanti-counterfeitingeffectwillbebetter.Someprintinganti-counterfeitinginkshavelargerpigmentparticlesandrequireathickerinklayer,whilethegravureprintinginklayeristhickerandtheprintedproducthasastrongertexture.Thecombinationofthetwowillachievedoubleanti-counterfeitinganddecorationeffects.Ifgravureprintingusesfluorescentink,itnotonlyguaranteesthemicroconvexityofgravureprinting,butalsoguaranteestheuserequirementsoffluorescentink,andthesecretanti-counterfeitingfunctionsofbotharealsoguaranteed.Theinkshouldbepreparedbyitself,andthenhandedovertotheprintingcompanyforuse.Afterprinting,theinkshouldberecoveredandstored,sothatabetteranti-counterfeitingeffectcanbeobtained.

Developmenttrend

1.Largeandmedium-sizedpackaginggravureprintingcompanieswilloccupythemainstream,especiallycigarettepackagegravureprintingcompaniesthatarepursuingeconomiesofscale,highqualityandhightechnology.

2.Duetoenvironmentalprotectionandhygienereasons,industriessuchasfood,medicine,tobacco,andwinearepayingmoreandmoreattentiontotheenvironmentalprotectionofpackagingmaterialsandprintingprocesses.Gravureprintingcompaniespaymoreattentiontotheenvironmentoftheprintingworkshop.Environmentally-friendlyinksandvarnisheswillbecomemoreandmorepopular,closedsqueegeesystemsandquick-changedeviceswillbepromotedandapplied,andgravureprintingmachinessuitableforwater-basedinkswillbewidelyadopted.

3.Theindependentdrivetechnologyofthegravureprintingmachineandtheelectronicshafttransmissionasthetechnologyplatformwillrealizethecomprehensiveupgradeofthegravureprintingmachine.Allkindsofgravureprintingmachineswilladoptelectronicshafttransmission.TheelectronicshaftdriveandregistersystemmainlycomefromJapanandEurope,buttheycanonlybeappliedtoasmallnumberofdomesticgravureprintingpresses.Thedevelopmentofadomesticoverprintsystemwillbethekeytoacomprehensiveupgradeofdomesticgravureprintingmachines.

4.Theratioofwide-formatgravurepressesandpapergravurepresseswillcontinuetoincrease.Ontheonehand,thedecorativeprinting(mainlywoodgrainpaperprinting)andcartongravureprintingmarketwillgrowrapidly.Ontheotherhand,therangeofflexiblepackaginggravureprintingmachineswillcontinuetoincrease,andthenumberoflargeformatgravureprintingmachineswillincreaserapidly.Paperandpaper-basedcompositegravureprintingmachines(woodgrainpapercigarettelabels,asepticpackaging,giftwrappingpaper,etc.)willgrowrapidly.

5.Theprocessingofthegravureproductionlinewillbemorediversified,andthefunctionconfigurationwillbecomestrongerandstronger,suchaspolishing,diecutting,crosscutting,softlabelcutting,etc.Correspondingly,gravureprintingmachinemanagementsystemsandremotetechnicalsupportsystemswillbemoreandmoreadopted.Atthesametime,inordertomeettheneedsofindividualization,allpartsfromunwinding,printing,in-lineprocessing,andwindingwillbemodularized,themostimportantofwhichwillbethegravurecartortheinterchangeofgravureandflexographicprinting.Smallcart.

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