《粉末涂料喷涂喷枪基础知识内部培训》PPT课件模板

（Excellenthandouttrainingtemplate）《粉末涂料喷涂喷枪基础知识内部培训》MetalPretreatmentforusewithPowderCoatings金属前处理MetalPreparation金属的处理Pretreatmentisaprocessintendedtopreventthecorrosionofthepaintedmetal.前处理是一种提高耐腐蚀的工艺Fe2+O2+H2O=RUSTIronreactswithoxygenandwaterintheatmospherecreatingapowderybrownmess,notveryornamental,andcontinuousuntilnosolidmetalremains.铁在空气中会与氧气和水反应生成褐色的物质MetalPreparation金属的处理WhyPretreatment?为什么要前处理？Powdercoatingsareusedtoenhancetheappearanceofbuildings,machines,furniture,appliances:粉末涂料用于改善建筑，机械设备，家具，以及其它器具的表面：Designersandarchitectsaresearchingtogivedistinctionintermsofcolourandeffects.设计师和建筑师提供了包括颜色和效果在内的 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 等级Theproblemisthatallpaintsareporous：所有的涂料均不同程度的存在会渗水的小孔MetalPreparation金属的处理Moleculesofwaterandsaltcanpenetratethroughthepaintfilm.Whentheyreachthemetalsurfacetheeffectisworsethanifthemetalisuncoated.Theanswer=Pretreatment水和盐分子可以渗透漆膜，一旦它们与金属表面接触，产生的影响甚至比没有喷涂还要糟糕。要解决这个问题就需要前处理。Pretreatment:前处理：Thechemicalconversionofthemetalsurfacebeforeapplyingthepowdercoating.Themetalthenresistscorrosionandtheconversionpermanentlyimprovestheadhesionofthecoating.在使用粉末涂料以前用化学 方法 快递客服问题件处理详细方法山木方法pdf计算方法pdf华与华方法下载八字理论方法下载 对金属表面进行处理，可以改善耐腐蚀性和增加涂层的附着力。Theperformanceofthepowdercoatingisonlygoingtobeasgoodasthemetalpreparation.Wewillcovertwotypesofmetaltreatmentsystems粉末涂料的功能类似于金属处理，我们将介绍两种的金属处理方法IronPhosphateforSteel用于铁系的磷酸铁ZincPhosphateforSteel用于铁系的磷酸锌Othersystemscanbeusedandinformationisavailable.当然还有其它处理方法前处理方式前处理依据工件形式,可有三种处理流程:喷淋:一般用于平板,死角少,形状单纯的工件,或速度较快的喷涂线,如家电,天花板…等浸渍:一般用于形状复杂,管件,死角多的工件,如家具…等游浸:此法为浸渍式的流水线作业方法,通常会搭配喷淋式共同使用,如运动器材MetalPreparation–IronPhosphate金属处理—磷酸铁Metalpretreatmentcanbeappliedbysprayordipping.金属前处理可以借助喷淋或浸渍Inthecaseofironphosphatetheprocesscouldlooklikethis:下面是磷酸铁的工艺流程Stages1,2and3canbeeithersprayordip步骤1，2和3均可采用喷淋或浸渍MetalPreparation–ZincPhosphate金属处理–磷酸锌ZincPhosphateprocessforsteeltendstobemorecomplicated磷酸锌的工艺流程复杂一些MetalPreparation金属处理DwellTime:Eachstagedependson:各阶段所需的时间，受下面的因素控制•Theamountofpretreatmentchemicaldissolvedinwater溶于水的前处理化学药品的浓度•Theageofthechemical化学药品的有效时间Regularcheckingisrequiredtogiveconsistentgoodresults–atleasttwicepershift.通常要经常检查前处理的状态—一个班至少两次MetalPretreatment-BS3189Type39stagepretreatment九步法Degrease脱脂Rinse水洗Rinse水洗AcidEtch(phosphoricacid)表调Rinse水洗ZincPhosphate磷酸锌磷化Rinse水洗Rinse水洗De-ionisedwater去离子水水洗Dry干燥QualityStandardBS6497参考英国标准BS6497MetalPretreatment–QualityControl金属前处理–质量控制TitrationChecks:检测项目：1.Cleaner2.Rinses3.AcidConcentration4.Rinse5.PhosphateConcentrationandcoatingweight6.Rinse7.ObservationsCheckedatregularintervalsduringnormalproductionandbeforeproductioncommences以上项目应在生产过程中定时和生产前进行检验MetalPretreatmentDry金属前处理干燥Toensuremetalsurfaceisdryreadyforpowdercoating.在喷涂粉末涂料前必须保证金属工件已经完全干燥不同前处理药剂比较磷酸铁磷酸锌膜重0.5g/m22.0g/m2盐雾试验150~400Hr1000Hr依据供应商提供资料定期监测药剂浓度,包含水的PH值前处理外观应尽量做到颜色均匀一致前处理不要太厚,一般来说大致3~5um(磷酸锌),或膜重0.2~2g/m2(磷酸铁)怀疑前处理有问题时,可用溶剂清洗工件作对比性测试喷涂前确保工件干燥SprayingandApplicationOfPowderCoatings粉末涂料的喷涂与应用PowderApplicationSystems粉末涂料的应用系统PowderApplicationSystemsFeedSystems粉末涂料应用系统供粉系统DirectfeedsystemfromDrumtoGun.粉末涂料直接从粉桶送至喷枪Thesystemshownfeeds1gun右图是只供一个喷枪的直接供粉系统PowderApplicationSystemsFeedSystems粉末涂料应用系统供粉系统Bulkfeedsystem,powderissuppliedinafibrebag.Weightofpowder–upto1,000kilosperbag.Usedmainlyonautomaticplantswherecolourchangeislimited.大型供粉系统，粉末涂料一般1吨一个包装，用于自动喷涂系统，限于换色较少的场合。PowderFluidisationSystems粉末涂料流化系统Theairmustbedryandfreefromwaterandoil.空气必须除水和油Dryairpassesthroughamembranegivingthepowderliquidqualities.干燥的空气通过微孔板，使粉末涂料象水一样流动。PowderDeliverySystems粉末涂料的传送系统PowderDeliverySystems粉末涂料的传送系统ActualpowderfeedsystemVenturifeedfromfluidbed.右图是用文氏管从流化床吸取粉末的送粉系统ForcesatworkonthePowderParticlesAtanyonetime4forcesareatworkonthepowderparticleasittravelsfromtheguntotheearthedwork-piece.粉末在离开喷枪到达工件时受4种力的影响-AirResistance-ElectrostaticAttraction-Weight(Gravity)-AerodynamicForcePowderChargingSystemsThereare2majorcategoriesinchargingofpowdercoatingcoronaandtribo:粉末涂料主要有两种带电方法—静电/摩擦GuntypeChargelocationInternalExternalCorona静电法Remotepowdersupply××Integratedgunpowdersupply××Tribo摩擦带电法×CoronaChargingSystems静电带电系统Inthismethod,ahighvoltagegeneratorisusedtochargeanelectrodeatthetipwhichcreatesanelectrostaticfield(orcorona)betweenthegunandthework-piece.利用高压电极使粉末带电，并在喷枪与工件间形成电场ExternalChargingSystem/外充电系统CoronaChargingSystems静电带电系统Coronacharging-manualsystem/手动枪-automaticsystem/自动枪CoronaChargingSystems静电带电系统InternalChargingSystem内充电系统CoronaNozzleSystems静电枪的喷嘴Thetypeofproducttobecoatedwillinfluencethenozzletobeusedonthespraygun,twotypesareshownCoronaNozzleSystems静电枪的喷嘴ConicalSprayNozzles–usedtogiveanevenlydistributedfilmthicknessoverflatpanels.圆锥型的喷嘴一般用于喷涂平面，并得到膜厚均匀的涂层。CoronaChargingSystems静电带电法Thehighvoltagepowersupplychargestheelectrode高压发生器使喷枪电极带电Theconcentratedchargecreatesanelectrostaticfield带上电荷后形成静电场Theelectrostaticfieldcausestheairtoionizeandgenerateacorona静电场使空气电离形成电晕Thecoronaemitselectrons电晕放射出电子Theelectronsarepickedupbyoxygenmoleculesformingnegativeions这些电子借助氧分子形成负离子CoronaChargingSystems静电带电法Theionsfollowthefieldlines负离子沿着电力线移动Thepowderparticlesdistortthefieldaroundthem粉末涂料粒子使周围的电力线产生扭曲Thedistortedfieldlinesdirectionstothepowderparticles扭曲后的电力线引导离子被粉末涂料粒子吸附Theionsbombardthepowderparticlesandtransfertheelectronsgivingtheparticlesanegativecharge吸附的离子轰击粉末粒子，并使其带上负电，形成负极TriboChargingSystems摩擦带电法Triboelectricityisgeneratedbythefrictionofonematerialonanother.InTribochargedsprayguns,thepowderrubsonaspeciallyformulatedandshapedsurfacewhichallowschargetotransfer.摩擦带电是通过不同物质摩擦形成的，摩擦枪可以使粉末与特殊设计并有特殊结构的表面摩擦而带电TriboChargingSystems摩擦带电法Tribonozzlesindifferentconfigurations.不同结构的摩擦枪喷嘴ElectrostaticFluidBedSystems静电流化床法PowderPenetration粉末的吸附Thepictureshowsthedevelopmentofthecorona(reddottedarea).Articlespassingthrougharechargedwiththenegativeions(-).Thechargedpowderparticlesareattractedtotheearthedsubstrate.右图显示了电场，电力线，粉末的充电及被接地的工件吸附过程。PowderPenetration粉末的穿透Achievingpenetrationintodeeprecessesinmostimportantwhenapplyingpowdercoating.粉末涂料能否到达死角这对粉末涂料的应用来说很重要Themosteffectivecontrolsarethenozzlepatternandairassistance.有效的控制方法是选择合适外形的喷嘴及调整辅助空气Itispossibletoovercomethe“FaradayCageEffect”现在，克服“法拉第”效应已成为一种可能FaradayCageEffectPowderPenetration粉末的穿透Reducingthe“FaradayCage”Effect减弱“法拉第”效应ToreducetheeffectitisnecessaryToassistinthecreationofchargedairParticlesinsidetherecess.Thisshouldbeachievedbyincreasingtheairstream.可以借助加大传送空气的压力来减弱“法拉第”效应FaradayCageEffect“法拉第”效应AFaradaycagecantechnicallybedefinedasanareawithinwhichthereisnoelectrostaticfield.Infinishing,thistermisappliedmoreloosely,andgenerallyreferstoanareasuchasinsidecornersorcavitiesthataredifficulttocoat.Thereasonwhytheseareasaredifficulttocoatisthattheadjacentsurfacestotheinsideofthecornerattracttheelectrostaticfiled,thereforedeflectingthepowderfrompenetratingintotherecessedareas.Atthesametime,thisrecessedareaisdifficultfortheaerodynamicforcestopenetrateintowithoutblowingpowderoffalreadycoatedareas.法拉第区域可以被认为是静电屏蔽区。实际应用中定义更宽松，通常是指死角和洞等难喷涂区域。难喷涂的原因是这些区域的外围吸引了电荷，这样粉末就不能被吸附。另外，从空气动力学来讲，输送空气将粉末吹至这些区域也很难。BackIonisation反弹效应A=powderattractedtotheearthedcomponentB=builduptocorrectfilmthicknessC=ionisedairwithinthepowderfilmrepelsoncomingparticlesA=粉末吸附在接地工件B=形成合适的膜厚C=在涂层上的离子云抵制吸附带有同类电荷的粉末PowderRecoveryIntegratedSystem粉末回收系统IntegratedSpray/RecoveryBoothSystem完整的喷涂/回收系统PowderRecoverySystems粉末回收系统Typicalcartridgeback-Pulsecleaningdesign.UsedincartridgeRecoverysystems.典型脉冲自清理设计，通常适用于桶状回收系统PowderRecoverySystems粉末回收系统CycloneRecoverySystemThecycloneisusedtoseparatethepowderparticlesfromtheair.Theairisdrivenroundthesidesofthecyclone,reducinginvelocityandreleasingthepowdertobecollectedatthebase.Finepowderisusuallytransportedoutofthecycloneontheairflow.旋风分离器根据粒径分离粉末，空气沿着旋风分离器壁做圆周运动，速度渐渐降低，并释放被收集的粉末至底部。细粉通常会随流动空气离开旋风分离器。PowderRecoverySystems粉末回收系统Finepowderiscollectedonafiltersysteminthe“afterfilters”.Thepneumaticairpulseensuresairflowisconsistentandthefinepowdercollectedfordisposal.细粉通过滤芯滤层被收集。有力的气体脉冲保证了空气流动的连续性及需被分离的细粉收集。PowderRecoverySystems粉末回收系统Amotorgeneratestheairflow.Ensuringthecorrectairvolumeandvelocityismaintained.电机提供流动空气，并保证气体流量和速度。Powderin-lineSievingSystems粉末过筛系统RotaryIn-LineSieve旋转筛PowderVibratingSievingSystems震动筛Vibratingsievesaredesignedtoworkeither:-Freestanding-In-line震动筛适用于：-独立区域-流水线PowderReciprocatorCycle粉末喷涂的往复机构CycleRate=No.OfGunsxPitchofGunsx60÷ConveyorSpeed(mm/min)往复速度=喷枪数量x喷枪位置x60÷传送链速度（毫米/分钟）Thiswillensurestriationsdonotoccuronthecomponentsbeingcoated.在喷涂中要保证不要形成带状涂层。StovingandCuringofPowderCoatings固化炉及粉末涂料的固化TypesofOven固化炉的类型Convection–energyistransmittedbyaircirculationtoheatthecomponents对流–热量通过空气流动传送，加热工件Radiation–energyistransmitteddirectlyontothepartswithoutheatingairbetweenthepartsandtheradiationsource辐射–热量直接从辐射源被传送至工件而无需空气作媒体Induction–energyistransmittedthroughinducingelectricaleddycurrentsthatgenerateheatinthemetalparts感应–热量借助电流来传送来加热金属工件TheBakingProcess固化过程Thebakingstage,duringwhichthepowdercoatingmelts,flows,gelsandfinallychemicallyreacts(crosslinking)andcures.Itiscriticaltotheperformanceofthecoatingthatthetemperatureandtimeattemperaturearemaintained.Mostbakingovensaredesignedtotakethesubstratethroughapre-programmedtime–temperatureprofile.固化过程包括粉末的熔融，流平，凝胶最后发生化学反应形成涂层。固化温度极其所占时间是非常重要的，大多数固化炉借助预先设置固化时间（温度曲线）来设PowderApplicationRadiationStoving粉末的辐射固化GasfiresInfra-Redovenusedforindustrialcomponents.左图为用于固化工业用品的瓦斯红外炉I-Remittersinsidetheovencurethepowderfilmwhenindirectline,asradiationenergy.右图为通过炉内红外发生器（热源）固化粉末涂料I-Risoftenusedtoboostthecuringinfrontofaconventionalaircirculatingoven.红外热常常被用于传统的利用空气循环的固化炉的前段•喷枪应定期检修,更换零件•定期检测炉温,建议半年一次•炉子须定期清理,依据使用的产品,燃料及频率而定,建议每月一次•注意喷涂环境清洁,回收风量不宜太小,造成逸散影响喷涂环境与质量•定期清理吊具,以免影响带电性,或因生锈造成异物掉落•滤芯式回收系统,注意逆洗,以免破坏滤芯或回收风量不足;定期清理浮动槽(一星期至少一次)•在每个过程中,最好都有品检人员:-进入前处理前:工件是否有生锈…-进入喷房前:工件是否处理干净,是否有药剂残留…-进入烤炉前:喷涂是否均匀,是否太薄或太厚…-工件下料:外观,基本机械性能…•理想喷涂环境-18~26oC-相对湿度40~60%•空压机出来的压缩空气的露点,不要超过5oC,较不含有油气或水气,若因高压空气的油水产生凹陷,则管路可能残留,应清理或更换•回收粉应有效地被管理QualityControlinPowderCoatings粉末涂料的质量控制Samplepreparation制样Powderisappliedusingacoronachargedhandspraygun左图为手动静电枪在喷涂粉末涂料Itisimportanttoensurealltheequipmentiscleanandfreefromanycontamination保证所有设备清理干净无污染是非常重要的ManualsprayingFilmthickness膜厚Afterstovingattherecommendedtimeandtemperature采用推荐的温度和时间固化后StatedasObjectTemp. 规定 关于下班后关闭电源的规定党章中关于入党时间的规定公务员考核规定下载规定办法文件下载宁波关于闷顶的规定 工件温度Thefilmthicknessischeckedtoensureitisinthespecifiedtolerance检查膜厚是否在标准的范围内Recordsaremadeoffilmthicknesswhentestingiscarriedout在测量膜厚时应记录结果Glossmeter光泽计MaximumandMinimumglossvaluesarecheckedandrecordedaccordingtoASTMD523(60°Angle)按ASTMD523（60°角）检查和记录光泽的最大和最小值Someindustriesmayuse85°angleand20°angle一些工业可能使用85°角和20°角ColorDifference色差Colourcheckedby/颜色的检测利用Eye/眼睛Computer/计算机Colordifferencesarequotedintermsof:颜色的不同通过下面几项反映Lightness黑白DLRed/Green红绿DaYellow/Blue黄蓝DbChroma(colorstrength)彩度DcHueAngle(shade)灰度DhAnoverallcolordifferenceiscalculated:DE将所有的颜色差别计算表示为：DEParticleSizeAnalysis粒度 分析 定性数据统计分析pdf销售业绩分析模板建筑结构震害分析销售进度分析表京东商城竞争战略分析 Powderparticlesarepassedthroughalaserlightsource粉末经过激光照射区Thedistributionofsizeismeasuredveryaccurately粒径分布被非常准确的测量出来Thedistributionischeckedagainsttheproductspecificationandrecorded粒径分布与产品的标准进行比较并作记录Particledistributioniscriticalforgoodcontrolinpowderapplication粒径分布对粉末涂料的质量控制非常重要MechanicalPerformance粉末涂料机械性能TestcarriedouttoBS3900Part3orASTMD2794依据BS3900Part3或ASTMD2794Ameasureofthecoatingsperformanceunderrapiddeformation是测试涂层快速变形性能的方法Performanceismeasuredintermsofcrackingordisbondmentofthecoating测涂层的裂纹或剥离程度Atestforcompletenessofcure是一种涂层完全固化后的测试ImpactTestMechanicalPerformance粉末涂料机械性能TestcarriedouttoBS3900PartE6orASTMD3359依据BS3900PartE6或ASTMD3359Ameasureofthecoatingsadhesiontothesubstrate是测试涂层附着力的一种方法Performanceismeasuredintermslossofadhesionfollowingatapepull-off测能被胶带粘离的涂层的比率Measuredin%removaloffilm表达单位为%TapAdhesionTestMechanicalPerformance粉末涂料机械性能TestcarriedouttoASTMD3363依据ASTMD3363Ameasureofthecoatingssurfacehardness测试涂层表面硬度的一种方法Performanceismeasuredasthehardestpencilleadtogivenorupturetothefilm测能破坏涂层的铅笔硬度MeasuredinBorHpencil.表达的单位用铅笔的硬度来表示（B或H等）PencilHardnessTestMechanicalPerformance粉末涂料机械性能TestcarriedouttoASTMD4061依据ASTMD4061Ameasureofthecoatingsabrasionresistance测试涂料耐磨损的一种方法Performanceismeasuredastheweightlossafteragivennumberofcycles测经过规定次数的旋转摩擦后的重量损失Measuredingrams表达单位为克TeberAbrasionTestTestcarriedouttoASTMD522/A依据ASTMD522/AAmeasureofthecoatingsflexibility测试涂料韧性的一种方法Performanceismeasuredastheminimumdiameterofbendnocrackingisseen测不产生裂纹的最小直径Measuredinmm表达的单位为毫米Thanks!演讲结速，谢谢观赏！Thankyou. ppt 关于艾滋病ppt课件精益管理ppt下载地图下载ppt可编辑假如ppt教学课件下载triz基础知识ppt 常用编辑图使用方法1.取消组合2.填充颜色3.调整大小选择您要用到的图标单击右键选择“取消组合”右键单击您要使用的图标选择“填充”，选择任意颜色拖动控制框调整大小商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素商务图标元素