6.油漆常见缺陷.ppt

3 5 2020 Prepareedby LiuChenzhong 2 漆膜缺陷原因分类 涂料问题 Productproblems 应用不良 Applicationproblems 设备因素 Equipmentproblems 环境因素 EnvironmentCause 颜色问题 Colourproblems 3 5 2020 Prepareedby LiuChenzhong 3 漆膜硬度不够 weak 描述 DESCRIPTION 表现为漆膜软 很容易被划伤 相应的耐溶剂性能表现差 3 5 2020 Prepareedby LiuChenzhong 4 原因 cause 通常是漆膜树酯交链不够好 而交链不够的主要因素有 树酯分子选择不合适 未完全干燥 高温漆或双组份漆烘烤温度不够 双组份漆固化剂配比不对 3 5 2020 Prepareedby LiuChenzhong 5 起泡 blowing 3 5 2020 Prepareedby LiuChenzhong 6 起泡的原因 cause 通常是基底有锈迹 污垢 小凹孔 磷化渣质 水汽等被封在漆膜底下 漆膜在烤干或受热时 这些物质彭涨将漆膜顶起造成 3 5 2020 Prepareedby LiuChenzhong 7 起泡的原因 底下有Money 3 5 2020 Prepareedby LiuChenzhong 8 鱼眼 FishEyes cissing 好可爱噢 真的象鱼眼睛呢 3 5 2020 Prepareedby LiuChenzhong 9 产生鱼眼的原因 cause 放大之后中间有核 通常是 素材被含硅类的物质污染 素材未很好清洁 裸手接触工件 油漆一次喷涂太湿 油漆体质敏感 3 5 2020 Prepareedby LiuChenzhong 10 预防 PREVENTION 鱼眼的产生 KeepthepartawayfromsiliconepollutionThoroughlycleanthesurfacewithwaxandgreaseremover Donotallowcleaningsolventstodryonthesurfacebutremovewithacleandrycloth Alwaysusetherecommendedmaterials Ensurethatthesprayingareaisproperlyventilated 3 5 2020 Prepareedby LiuChenzhong 11 与鱼眼相似的其它缺陷1 水泡 blister 工件表面被溅上水珠 你见过水性漆出现此缺陷吗 3 5 2020 Prepareedby LiuChenzhong 12 与鱼眼相似的其它缺陷2 油污 oilpollution 工件表面被轻质油污染 3 5 2020 Prepareedby LiuChenzhong 13 起云 斑纹 Clouding Mottling 3 5 2020 Prepareedby LiuChenzhong 14 起云 斑纹 Clouding Mottling 起因 常见于银粉漆 主要是银粉排列不一致 主要原因有 十字交叉喷涂 使用太差的稀释剂 或稀释剂加入太少 枪未调好 喷涂手法不正确 5素材厚薄不一 这种情况常叫应力纹 3 5 2020 Prepareedby LiuChenzhong 15 应力纹 mapping 在5220机壳上常出现应力纹的地方 3 5 2020 Prepareedby LiuChenzhong 16 腐蚀 生锈 corrosion rusting 3 5 2020 Prepareedby LiuChenzhong 17 腐蚀或生锈 cause 油漆本身防腐性能差 基材除锈不干净 基材表面有汗迹等污染 磷化质量太差 或磷化液清洗不干净 基材表面有补土 3 5 2020 Prepareedby LiuChenzhong 18 脏点 尘点 异色点 Dirt threads Bits 3 5 2020 Prepareedby LiuChenzhong 19 脏点 纤维 异色点 Dirt threads Bits 3 5 2020 Prepareedby LiuChenzhong 20 脏点 纤维 异色点 Dirt threads Bits 此类缺陷目前占有相当大的比例 您知道其主要原因是什么吗 3 5 2020 Prepareedby LiuChenzhong 21 颗粒 particles 产生原因 素材本身灰尘未被去处 油漆未过滤 或滤网太粗或太脏 喷房 流平间 烤房等环境被污染 调漆间脏污 油漆未盖好 调漆罐 供漆管路 喷枪清洗不够 压缩空气未过滤 或滤网太脏 3 5 2020 Prepareedby LiuChenzhong 22 纤维或毛丝 主要来自衣服纤维 人员走动太多 未穿防尘衣 也有来自劣质空气过滤网 3 5 2020 Prepareedby LiuChenzhong 23 当这类缺陷很多时 怎么办 WhatcanIdo 3 5 2020 Prepareedby LiuChenzhong 24 建议 当这类缺陷很多时 建议将缺陷样品抽取30 50片进行详细分类 有必要的话 使用放大镜观察缺陷形状 颜色等 然后分析原因改善检察改善效果制定SOP贯彻执行SOP 3 5 2020 Prepareedby LiuChenzhong 25 干喷 异常光泽低 Dryspray lossofgloss 描述 DESCRIPTION Althoughapparentlysmoothandevenlyapplied thesurfacelacksshine 3 5 2020 Prepareedby LiuChenzhong 26 起因 CAUSE Microscopicroughnessofthesurfacewhichmayresultfrom a poorholdoutofprimer ortheapplicationoftopcoatoverprimerwhichisnotthoroughlydry b poorqualityorincorrectthinner ortheuseofadditivesinthepaint c incorrectlypreparedorpoorlyappliedpaint d applicationoverapoorsubstrate e excessivelyslowdryingduetohighhumidityorlowtemperature f solventfumesorexhaustgasesattackingthesurface g surfacecontaminationbywax grease oil soaporwater 3 5 2020 Prepareedby LiuChenzhong 27 预防 PREVENTION a Usethecorrectproportionofrecommendedthinner b Usecorrectsprayingtechniques ensurethatequipmentisclean setairpressureaslowaspossible consistentwithproperatomisation sprayfromthecorrectdistance c Useaspraybooth andensurethataircirculationandextractionisatthecorrectvelocity 3 5 2020 Prepareedby LiuChenzhong 28 漆膜太薄InadequateColourCoverage 描述 DESCRIPTION Underlyingsurfacesvisiblethroughthepaintfilm mostfrequentlyinhardtosprayareas onlowerpanelsoronsharpedgesandcontours 3 5 2020 Prepareedby LiuChenzhong 29 预防 PREVENTION a Usethecorrectsprayingtechnique ensureevenandadequatefilmthickness b Workundergoodlightingconditionsinaproperlysizedspraybooth payspecialattentiontoinaccessibleareas c Ensurethatthematerialsarethoroughlymixed d Avoidexcessivecompoundingandpolishing Takespecialcareonedgesandsharpcontours 3 5 2020 Prepareedby LiuChenzhong 30 橘皮 OrangePeel 描述 DESCRIPTION Pebbled unevensurfaceofthepaintfilm similarinappearancetoorangeskin 3 5 2020 Prepareedby LiuChenzhong 31 橘皮 OrangePeel 起因 CAUSE Poorsprayingtechnique sprayguntoofarfromsurface incorrectcompressedairpressure incorrectnozzleadjustment Excessivelythickorthinfilm c Paintincorrectlymixed wrongviscosity poorqualityorincorrectthinner Insufficientdryingtimebetweencoats coldairfanningtospeeddrying e Incorrectambientorsurfacetemperature draughts 3 5 2020 Prepareedby LiuChenzhong 32 橘皮 OrangePeel 预防 PREVENTION a Usethecorrectsprayingtechniqueandensurethatequipmentiscorrectlyadjustedb Applypaintinthin evencoatsc Ensurethatthepaintiscorrectlymixed useonlyrecommendedthinnerwiththecorrectgraded Allowsufficientdryingtimebetweencoatse Spraywithinthere commendedtemperaturerangeandensureproperventilation 3 5 2020 Prepareedby LiuChenzhong 33 针孔 Pinholing 描述 DESCRIPTION Smallcavities generallylessthan1mmindiameter occurringoverstopper fillerorGRPsubstrate 3 5 2020 Prepareedby LiuChenzhong 34 针孔 Pinholing 预防 PREVENTION a Donotspraytoothickonetime b Flashingthefilmbeforebaking c Useonlyrecommendedmaterials d Mixthepaintcorrectly useslowdrythinner e Keepmaterialsclean 3 5 2020 Prepareedby LiuChenzhong 35 流挂 Runs Sags 描述 DESCRIPTION Welldefinedlocalthickeningofthepaintfilmintheformofawavylineorshallow roundedridges normallyconfinedtosharplyslopingorverticalsurfaces 3 5 2020 Prepareedby LiuChenzhong 36 流挂 Runs Sags 起因 CAUSE Slumpingofthepaintfilmdueto a Excessthicknessofapplication airpressuretoolow fanwidthtoonarrow sprayguntooclosetothesurfaceormovingtooslowly b Useofpoorqualityorincorrectthinner c Incorrectviscosityofthepaint d Airorsurfacetemperaturetoolow e Contaminationoftheunderlyingsurface 3 5 2020 Prepareedby LiuChenzhong 37 流挂 Runs Sags 预防 PREVENTION a Usethecorrectsprayingtechniqueandspraygunsettings b Useonlyrecommendedthinner c Ensurethatthepaintismixedtothecorrectviscosity d Alwaysspraywithintherecommendedtemperatures e Ensurethatthesurfaceisscrupulouslyclean 3 5 2020 Prepareedby LiuChenzhong 38 色差 Colordifferent 3 5 2020 Prepareedby LiuChenzhong 39 色差原因 Cause 1 颜色有浮动效应 thefloatationeffect 2 批次 厂家不同3搅拌不均匀 3 5 2020 Prepareedby LiuChenzhong 40 溶剂泡 SolventPopping 描述 DESCRIPTION Opentoppedblistersupto1mmindiameteronthesurfaceofthemostrecentlyappliedpaintfilm 3 5 2020 Prepareedby LiuChenzhong 41 溶剂泡 SolventP