Причини
Accordingtoexperienceandanalysisofnewspapers,ghostimagesaremainlycausedbythefollowingreasons:
1) Лоша корекция на налягането
Theprintingpressureandthecontactpressurebetweenthevariousinkrollersarenotinthebestprintingstate,causingpartialinkshortageandforming"ghostimages".Theinkrollersarerequiredtohavegoodcontactwitheachothertoensurethenormaltransmissionoftheink,andthecontactshouldnotbetoolightortooheavy.Accordingtocommonsense,thethinsolidlinesonthelayoutarenoteasytoproduce"ghostimages",butduetoimproperadjustmentofthepressurebetweentheinkrollers,thenormalinktransferandwatersupplywillbeaffected,andthephenomenonof"ghostimages"willalsooccur.Aslongasthepressureisre-adjustedtoensurethesmoothandeventransferoftheink,the"ghostimage"phenomenoncanbeeliminated.However,iftheprintingpressureistoolight,therewillbepartialblurringintheprintedproduct,andwaterrippleswillalsoappearinseverecases.
2) Цилиндричните зъбни колела и лагерните зъбни колела са износени
Thejournalofthecylindershaftoftheprintingpressisequippedwithhelicalgearsforpowertransmissionandprecisepositioning.Duetothefastrunningspeedandlongworkinghoursofthepress,thewearisnaturallyserious,anditiseasytocausethegearmeshinggaptobetoolarge,causingthecombinedpressurebetweenthelongitudinalrollerstoslip,andthecontactbetweenthegearsisslightlymisaligned,causing"ghosting".Thesolutiontothisproblemistoreplacegearsandbearings;reducethecenterdistanceoftherollerstoreducethegapbetweentherollers.
3) Покривалото и печатащата плоча не са затегнати
Theblanketisnotstretchedtightly,causingtheblanketcylindertonotberesetintimeafterbeingpressedortheblanketisskewedduringcutting,Resultingin"ghosting".Theprintingplatecanalsocause"ghostshadows"duetoinadequateworkandnotightening.Carefullycheckatwork,thesefaultscanbasicallybeeliminated.
4)Дизайнът на оформлението на вестниците трябва да бъде подобрен
Usingthicksolidlines,regionalisolationlinesordecorativelinestodesignthelayout,theselinesareperpendiculartothedirectionoftheinkrolleroftheprinter,andTherearepicturesonbothsidesofthelineortherearelightermeshdecorativestripsperpendiculartotheinkroller,so"ghostimages"arelikelytooccuronthesemeshdecorativestrips.Thereasonisthatthickandsolidlinesconsumelargeamountsofinklocallyinprinting,andthereareoftenblankpartsonbothsidesoftheline.Duetothestructuralcharacteristicsoftheprinter,theinkrollercannotbefilledwiththerequiredinkintime,causingthephenomenonof"ghostimaging".Aslongaswearefamiliarwiththeaboveprinciplesandperformcorrectoperations,wecanreducetheoccurrenceof"ghostimages".