涂装常见缺陷分析 PPT.ppt
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涂装常见缺陷分析 PPT.ppt

涂装常见缺陷分析PPT.ppt

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涂装常见缺陷分析漆膜缺陷原因分类:漆膜硬度不够(weak):原因(cause):起泡(blowing):起泡的原因(cause):起泡的原因:溶剂泡(SolventPopping)大家应该也有点累了,稍作休息溶剂泡(SolventPopping)溶剂泡(SolventPopping)针孔(Pinholing)针孔(Pinholing)鱼眼/FishEyes(cissing)产生鱼眼的原因(cause):预防(PREVENTION)鱼眼的产生与鱼眼相似的其它缺陷1.水泡(blister)与鱼眼相似的其它缺陷2.油污(oilpollution)起云/斑纹,(Clouding/Mottling)起云/斑纹,(Clouding/Mottling)应力纹(mapping):脏点/尘点/异色点(Dirt/threads/Bits)脏点/纤维/异色点(Dirt/threads/Bits)脏点/纤维/异色点(Dirt/threads/Bits)颗粒(particles)产生原因纤维或毛丝:当这类缺陷很多时,怎么办??建议干喷/异常光泽低(Dryspray/lossofgloss)起因(CAUSE)Microscopicroughnessofthesurfacewhichmayresultfrom:a)底漆太差或底漆未干就喷面漆.poorholdoutofprimer,ortheapplicationoftopcoatoverprimerwhichisnotthoroughlydry.b)稀释剂太差或加了不合适的添加剂.poorqualityorincorrectthinner,ortheuseofadditivesinthepaint.c)素材前处理不当或喷漆手法不对.incorrectlypreparedorpoorlyappliedpaint.d)素材质量太差applicationoverapoorsubstrate.e)高湿低温时漆膜干燥太慢.excessivelyslowdryingduetohighhumidityorlowtemperature.f)溶剂蒸气在漆膜表面冷凝.solventfumesorexhaustgasesattackingthesurface.g)表面被污染.surfacecontaminationbywax,grease,oil,soaporwater.预防(PREVENTION)a)选择正确种类和比例的稀释剂Usethecorrectproportionofrecommendedthinner.b)正确的喷漆手法:枪距,扇形,气压……Usecorrectsprayingtechniques,ensurethatequipmentisclean,setairpressureaslowaspossible,consistentwithproperatomisation,sprayfromthecorrectdistance.c)使用合适的喷房,确保喷房有良好的空气流通.Useaspraybooth,andensurethataircirculationandextractionisatthecorrectvelocity.漆膜太薄InadequateColourCoverage预防(PREVENTION)a)使用合适的喷涂方法确保合适的漆膜厚度.Usethecorrectsprayingtechnique,ensureevenandadequatefilmthickness.b)使用合适的治具,合适的灯光照明;特别注意难喷涂表面.Workundergoodlightingconditionsinaproperlysizedspraybooth,payspecialattentiontoinaccessibleareas.c)确保漆料混合均匀.Ensurethatthematerialsarethoroughlymixed.橘皮(OrangePeel)橘皮(OrangePeel)橘皮(OrangePeel)流挂(Runs/Sags)流挂(Runs/Sags)流挂(Runs/Sags)色差(Colordifferent)色差原因(Cause)腐蚀/生锈(corrosion/rusting):腐蚀或生锈(cause):胀气