讲解减少涂装颗粒的控制措施颗粒在涂装中是最常见的涂膜缺陷之一，在任何一个涂装生产线都会不同程度的存在。它是影响涂装一次交检合格率的最大的也是最难以根除的涂膜弊病。因为颗粒造成的车体返修大大增加了涂装成本，经核算，每台车的中修费用100元左右，而一台车返大修，重新喷涂一遍面漆大约需要成本350元。在外观上修理过的涂膜也略差于一次成型的涂膜。在涂装生产中，涂膜颗粒弊病可以说是顽疾，几乎是无法杜绝的，只能是在生产过程中不断摸索，分析总结，采取相应的措施，使颗粒的产生降到最低，从而减少生产成本，提高生产效率。Particlesinthecoatingisoneofthemostcommoncoatingdefects,inanycoatingproductionlinewillbetheexistenceofdifferentlevel.Itisanespeciallyaffectsthequalificationrateofthelargestandmostdifficulttoeradicatethecoatingofills.Becauseparticlescausedbythebodyrepairgreatlyincreasethepaintingcost,bythecalculation,eachvehiclerepaircostsabout100yuan,whileacarbacktooverhaul,sprayingthepaintagainneedtocostabout350yuan.Theappearanceofrepaireditdoesslightlylesscoatingappliedtothemoldingofacoating.Inpaintingproduction,coatinggrainillscanbesaidtobetheills,almostimpossibletoeliminate,canonlyfumbleceaselesslyisintheprocessofproduction,analysissummary,takecorrespondingmeasurestomakethegenerationofparticlestoaminimum,thusreducingtheproductioncost,improveproductionefficiency.2.1颗粒的定义2.1thedefinitionofparticle涂膜上的突起物叫做颗粒，也称脏点，用目视或触摸可以辨别。Bumpscalledparticlesonfilm,alsocalleddirtypoints,withvisualortouchyoucanidentify.2.2颗粒的分类2.2theclassificationofparticles由于造成涂装颗粒的因素众多，很难制订一个统一的分类标准，按照经验可大致分类如下：Duetothecoatingparticlescausedbymanyfactors,itisdifficulttoformulateaunifiedstandardofclassification,accordingtotheexperiencecanbebroadlyclassifiedasfollows:（1）环境颗粒：由环境因素导致的涂膜颗粒。（2）干燥炉颗粒：因干燥炉不干净而产生的涂膜颗粒。多为黑色坚硬，难以修整，易造成批量返工。（3）涂料颗粒：产生原因多为调输漆系统的涂料沉淀、喷枪或喷杯清洗不净，或雾化效果不好等。（4）喷胶颗粒：因注焊缝胶或喷抗石击底盘胶时，产生的多余胶颗粒。（5）前处理颗粒：白皮车身残留的铁屑、焊渣所致，多发生在门口部位，打磨极其困难。（6）静电颗粒：喷涂金属底漆时，喷涂设备造成的颗粒。(1)environmentalparticles:coatingparticlescausedbyenvironmentalfactors.(2)thedryingfurnaceparticles:duetodryingovenisn'tcleancoatingparticles.Mostlyblackhard,difficulttorepair,easytocausethebatchrework.(3)coatinggrain:reasonformoreadjustablepaintcoatingdeposition,spraygunorcupcleaningnotnet,oratomizationeffectisbad,etc.(4):sprayadhesiveparticlesduetoweldplasticinjectionorspraychassiswithresistancetostoneglue,theexcessgluegranules.(5)pretreatmentparticles:whitebodycausedbyresidualscrapiron,weldingslag,tendtooccurintheentrancearea,burnishisextremelydifficult.(6)electrostaticparticles:sprayingmetalprimer,paintsprayingequipmentcausedbytheparticles.3涂装生产线颗粒产生的原因及防治措施3coatingproductionlineparticlescausesandpreventionmeasures根据颗粒产生的定义和分类，对不同类型的颗粒产生原因加以治理，以下按生产线的工艺顺序，分析影响漆膜质量的原因并介绍为防止颗粒所采取的措施，提出可以试用的一些办法。Accordingtothedefinitionofparticlegenerationandclassification,causestorunondifferenttypesofparticles,thefollowingorderaccordingtotheproductionlineprocess,analysisreasonsofaffectingthequalityofpaintfilmandintroducesthemeasurestakentopreventtheparticles,cantrysomemeasuresareputforward.3.1前处理线3.1b...
