印刷过程中油墨温度场的分析VIP免费

摘要油墨作为印刷生产中的重要材料之一，它的特性如何很大程度上决定着产品的印刷质量。油墨的多种特性中，粘度又是最为重要的。而在实际生产中，影响油墨粘度最为明显的因素就是温度。温度高时，油墨分子相对移动能力增强，油墨的粘度下降；温度低时，油墨分子内聚力强，油墨的粘度上升。因此，通常温度增高，油墨变稀，温度降低，油墨变稠。本课题中，通过ANSYSCFX建立油墨流动仿真模型，提取数据，分析温度变化；随后通过对油墨印刷适应仪进行多组模拟印刷实验，用温度枪和红外热像仪测量墨辊表面温度数据，记录并处理数据，分析油泵压力、墨辊转速对油墨温度上升的影响，得出结论，并与仿真的结论进行对比分析，掌握油墨温度变化机理以及油墨温度场变化的特性，从而对实际生产提供理论依据。关键词：印刷；油墨；粘度；温度AbstractInk,asoneoftheimportantmaterialintheproductionofprinting,howitsfeaturestoagreatextentdeterminetheprintqualityoftheproduct.Avarietyoffeaturesofink,viscosityisthemostimportant.Intheactualproduction,factorsaffectinginkviscosityisthemostobviousisthetemperature.Athightemperature,theinkmoleculesrelativemobilityenhancement,inkviscositydecreased;Atlowtemperature,strongmolecularcohesionink,inkviscosityrise.Often,therefore,highertemperature,inkisthinning,temperatureisreduced,inkthicken.Thistopic,providedbyANSYSCFXinkchannelsimulationmodelissetup,extractthedata,theanalysisoftemperaturechange;Thenthroughtheinkprintingtoadapttotheinstrumenttomultiplesetsofsimulationexperiment,thetemperaturegunandinfraredthermalimagerwasusedtomeasuretheinkrollersurfacetemperaturedata,recordandprocessthedata,analysistheinfluenceofvariousfactorsontheinktemperaturerise,cometotheconclusion,andcomparedwiththeconclusionofsimulationanalysis,grasptheinktemperaturechangemechanismandthecharacteristicsofinktemperaturefieldchanges,soastoprovidetheoreticalbasisforpracticalproduction.Keywords:printing；printingink；viscosity；temperature目录摘要................................................................IAbstract............................................................II第1章绪论.........................................................11.1课题的意义...................................................11.2课题的背景...................................................11.2.1油墨的性质.............................................11.2.2油墨温度对印刷的影响...................................21.2.3热传递规律.............................................21.3研究目标.....................................................31.4技术路线.....................................................41.5课题研究内容.................................................41.5.1ANSYSCFX仿真分析.....................................41.5.2印刷过程中油墨温度场的变化.............................4第2章ANSYS仿真....................................................52.1油墨流动模型................................................52.2网格划分....................................................52.3CFX-Pre前处理..............................................62.3.1库设定.................................................62.3.2计算域设定.............................................72.4边界条件设定................................................92.4.1Inlet入口边界条件.......................................92.4.2Outlet出口边界条件....................................102.4.3Wall壁面边界条件......................................112.5初始条件设定...............................................142.6求...