Domov Technika Hlubotisk

Hlubotisk



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.

Typy

Typy hlubotisku se dělí na dva typy podle způsobu výroby desek: rytí, hlubotisk a leptání, hlubotisk.

Engravingintaglio

Engravingintaglioistodirectlyengravethepitscorrespondingtotheoriginalimageandtextonthesurfaceoftheprintingplatecylinderwithacutter.Accordingtothecontrolmethodofthecutter,itcanbedividedintoHand-engravedintaglio,mechanicalengravedintaglioandelectronicengravedintaglio.

(1)Ručně ryté rytí

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

(2) Mechanické rytí

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)Elektronické rytí

Thiskindofplateisengravedonthesurfaceoftheprintingplatecylinderbytheelectroniccontroldevicetocontrolthecarvingknife.Usingtheelectronicengravingmachine,accordingtothephotoelectricprinciple,theengravingknifeiscontrolledtoengravethemeshonthesurfaceofthedrum,andtheareaanddepthofthemesharechangedatthesametime.

Corrodedintaglio

Thecorrodedintaglioismadebyetchinginkpitsonthesurfaceoftheplatecylinderbychemicaletchingaccordingtotheoriginalgraphicsandtext.Accordingtothedifferentmethodsofmanuscriptimageandtextconversion,thecorrosionintagliocanbedividedintoetchingintaglio,photointaglio,anddotintaglio.

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

Photogravureiswidelyused,andisthemostwidelyusedprintingplateingravureprinting,mainlyusedforprintingpictures.

Dotgravureismainlyusedforpackaginganddecorationprintingandbuildingmaterialsprinting.

Produkční faktory

Rukopisy

Rukopisy jsou většinou kontinuální kámen.

Ink

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

Theprintingplate

Asignificantdifferencebetweentheintaglioplateandotherplatesisthatthegraphicpartiscomposedofconcaveholeslowerthanthenon-graphicpart,andtheprintingplateismadeofmetalmaterials.Itisfinishedwithchromeandcopperplatedontheoutside.

Podklad

Materiál pro hlubotisk může být velmi široký, ale lze jej použít pro tisk vysoce kvalitního papíru a plastové fólie.

Tlakařské stroje

Hlubotiskový stroj se obvykle skládá z osmi částí, včetně odvíjecí části, vodícího válce, přítlačného válce, tiskového válce, barvicí části, čepele, sušičky, přijímací objemové části, části hlubotiskového stroje, včetně libovacího systému a elektrického systému, kalibrace

Productionprocess

Becauseofthehighdegreeofautomationoftheprintingmachineandthehighqualityofplatemaking,theprocessoperationofgravureprintingissimplerthanthatoflithographicprintingandeasytomaster.Theprocessflowisasfollows:

Předtisková příprava→Předtisková příprava→Pravidla pro úpravy→Formální tisk→Potiskové zpracování

Předtisková příprava

Příprava pro hlubotisk zahrnuje: přípravu na tisk podle požadavků konstrukčního listuJe nutné namazat tiskový lis materiály, inkoustem, stěrkou atd.

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

Hlubotisk s použitím těkavého inkoustu z rozpouštědla, nízké viskozity, dobré tekutosti a silné přilnavosti. Běžně používaná rozpouštědla jsou toluen, xylen, benzín, alkohol atd. Před tiskem přidejte do inkoustu správné množství rozpouštědla a před použitím jej nejlépe přefiltrujte.

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.

Pravidla pro seřízení

Po dokončení předtiskových příprav pečlivě zkalibrujte tiskovou desku, zkontrolujte podávání papíru, podávání papíru, podávání papíru a tahová pravidla a proveďte příslušná nastavení. Opravte tlak a seřiďte přísun inkoustu

Theadjustmentofthesqueegeeismainlytoadjustthedistancebetweenthesqueegeeandtheprintingplateandtheangleofthesqueegee,sothatthepressureofthesqueegeeonthelayoutisevenwithoutdamagingtheprintingplate.

Formální tisk

Během procesu formálního tisku byste měli vždy zkontrolovat, zda jsou body neporušené, zda je přetisk přesný, zda je inkoust světlý, zda viskozita inkoustu a zasychání jsou v souladu s rychlostí tisku Přizpůsobení, je na stěrkovacích značkách, stěrka, broušená čára je rovnoměrně rozřezaná. list.

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.

Široká škála

Obecné měkké materiály lze použít jako substráty pro hlubotisk. Například plast, papír, hliníková fólie atd., zejména pro některé materiály, které se snadno roztahují a deformují, jako jsou například textilní materiály atd., které mají lepší přizpůsobivost tisku, které se lisováním a neshodují.

Vysoká kvalita tisku

Hlubotisk používá velké množství inkoustu, grafika a text jsou konvexní a vrstvy jsou bohaté, linie jsou jasné a kvalita je vysoká. Většina tisku knih, časopisů, časopisů, obalů a dekorací je hlubotisk.

Massprinting

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

Digitalplatemaking

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

Metoda elektronického gravírovacího stroje

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.

Proces laserového rytí a následného leptání

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.

Výhody a nevýhody

①Výhody:Ink je asi 90% výrazný a má bohaté barvy.Silná reprodukovatelnost barev.Tolerance silných stránek.Počet tisků je velký.Rozsah použití papíru je široký a materiály jiné než papírové kanály mohou být potištěny.

②Nevýhody: poplatek za výrobu desek je drahý, poplatek za tisk je také drahý, práce na výrobě desek je složitější a malý počet tisků není vhodný.

Rozsah použití hlubotisku

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.

Monochromatické hlubotisky, světlé, střední a tmavé tóny jsou dobře definované, koordinované a jemné. Vývody jsou čisté a kompletní. Uspořádání je stejné a čisté.

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

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

Kontrola kvality tisku

1.Zařízení pro automatický přetisk

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

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

2.Zařízení pohlcující elektrostatický inkoust

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

Problémy

Chyby pravoúhlého tisku jsou způsobeny hlavně tiskovými deskami, inkousty, substráty, stěrkami atd.

(1)Nerovnoměrnost barvy inkoustu

Thephenomenonofperiodicinkcolorchangesonprintedmatter.Theeliminationmethodsare:correcttheroundnessoftheplatecylinder,adjusttheangleandpressureofthesqueegeeorreplacewithanewsqueegee.

(2)Otisk je neostrý a načechraný

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

(3)Blokování

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

(4)Inkovoverflow

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

(5)Škrábance

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

(6)Precipitace pigmentu

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

(7)Špinavý

Thereisinkstainontheprintedmatter.Theeliminationmethodsare:chooseprintinginkwithfastvolatilizationspeed,increasethedryingtemperatureorappropriatelyreducetheprintingspeed.

(8)Propouštění inkoustu

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

Rozsah použití

1. Účinek ručního hlubotisku proti padělání je lepší

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. Výroba a tisk desek se provádí na dvou místech

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

3. Kombinujte s technologií proti padělání inkoustu

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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