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In the process of book printing, if the temperature and humidity of the printing paper are not well controlled, it is likely to hinder the whole printing process due to the phenomenon of stuffy car.<br><br>The printing press is very sensitive to paper. If the temperature and humidity are not well controlled, it is easy to produce curly edges on the paper, which will have an impact on the printing paper feeding and printing overprint.
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How to adjust the humidity of book printing paper? Intheprocessofbookprinting,ifthetemperatureandhumidityofthe printingpaperarenotwellcontrolled,itislikelytohinderthewholeprinting process due to the phenomenon of stuffy car. Theprintingpressisverysensitivetopaper.Ifthetemperatureandhumidity arenotwellcontrolled,itiseasytoproducecurlyedgesonthepaper,which will have an impact on the printing paper feeding and printing overprint. HowdoestheChineseprintingfactoryadjustthehumidityofthebook printingpaper?Duringnormalprinting,thepaperfeedinghead,frontgauge, pullgauge,paperfeedingsystemandfrontgaugedetectionsystemcooperate closely.However,duetopaperreasonsoradjustmentfaults,severaloreven morethanadozensheetsofpaperenterbetweentheembossingdrumand therubberdrum,resultinginasuddenstop,whichiscalledstuffycar.Stuffy carhasafatalimpactontheprintingopportunity,Therefore,itneedstoattract the attention of printing workers. Themainreasonsforthestuffycarare:first,thegapisnotadjustedwell, includingbetweenthepaperfeedingheadandthepaperfeedingtable,and betweenthepaperfeedingrollerandthepaperfeedingrollerofthe mechanicaldoublesheetcontroller.Theheightadjustmentofthepressing sheetatthefrontendofthepaperfeedingtableisinappropriate.Generally,it isthethicknessof3printingpapers.Ortheultrasonicdoublesheetcontroller andswingrodmechanismfail,resultingindoublesheetsandmultiplesheets. Second,thepaperadhesioncausesseveralsheetsofpapertobesuckedup atthesametimefortransportation,becausetheinklayeroftheprintistoo thickorthepaperisdeformed.Thethirdisthestuffyaccident.Whenthe printingpressisworkingnormally,ifthepaperreachesthefrontgaugeearly, late,skew,lackofangle,crimpingandlackofpaper,thephotoelectric detectionimmediatelycommandsthefrontgaugetostopswingingtoprevent thepaperfromenteringthedrumagain.Atthesametime,theswingpaper deliveryteethdonotholdthepaper,themachineslowsdown,thedrumis pressedoff,theinkingrollerislifted,andthewatertransferrollerandinking rollerstopswinging.Iftheelectricalcontrolcircuitfails,itiseasytorollastack ofpaperbetweentheembossingdrumandtherubberdrum,andastuffy
accident will occur. Therefore,thebookprintingcompaniesmustsetupaspecialpaper warehousetomakethetemperatureandhumidityofthestorageplacecloseto theprintingworkshop.Suchpaperisprintedonthemachineaftercutting, whichhaslittleimpactontheprintingqualityandcanensuresmoothpaper feeding.
