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ID:19902799
大小:3.53 MB
页数:44页
时间:2018-10-07
《涂装常见缺陷分析ppt课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、涂装常见缺陷分析G3MODULENAMEMODULENUMBER6/29/20212漆膜缺陷原因分类: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)6/29/20213漆膜硬度不够(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。6/29/20214原因(cause):通常是漆膜树酯交链不够好,而交链不够的主要因
2、素有:1树酯分子选择不合适;2未完全干燥;3高温漆或双组份漆烘烤温度不够;4双组份漆固化剂配比不对。6/29/20215起泡(blowing):6/29/20218溶剂泡(SolventPopping)描述(DESCRIPTION)新喷漆膜表面有直径小于1MM的小气泡。Opentoppedblistersupto1mmindiameteronthesurfaceofthemostrecentlyappliedpaintfilm.6/29/20219溶剂泡(SolventPopping)起因(CAUSE)Airorsolventva
3、pourtrappedbyfastdryingpaintformingaskin.Thismaybedueto:a)天那水太差或太快干。poorqualityortoofastthinner.b)喷得太厚或两层漆之间干燥时间不够。excessivefilmthickness,orinsufficientdryingtimebetweencoats.c)压缩空气压力太低。compressedairpressuretoolow.d)加热太快。dryingtemperaturetoohigh,heatsourcetooclosetoth
4、efilm,toohot,orappliedtoosoon.6/29/202110溶剂泡(SolventPopping)预防(PREVENTION)a)确保工件表面清洁Ensurethatthesurfaceisscrupulouslyclean.b)使用合适的天那水。Useonlyrecommendedthinner.c)每层漆膜厚度合适,并适当闪干Applypaintinthin,wetfilms.Allowsufficientdryingtimebetweencoats.d)使用正确的喷漆压力Usecorrectcompre
5、ssedairpressure.e)烘烤前适当流平,避免加热过快,热源过近。Allowsufficientflashofftimebeforeforcedrying,ensurethatthecorrectdryingtemperatureisnotexceeded.Donotallowtheheatsourcetobeplacedtooclosetothesurface.6/29/202111针孔(Pinholing)描述(DESCRIPTION)小凹穴,通常直径小于1MM。Smallcavities,generallyless
6、than1mmindiameter,6/29/202112针孔(Pinholing)预防(PREVENTION)a)一次不要喷得太厚。Donotspraytoothickonetime,b)烘烤之前适当流平。Flashingthefilmbeforebaking.c)使用涂料厂商推荐的附料。Useonlyrecommendedmaterials.d)正确调配油漆,使用较慢干稀释剂。Mixthepaintcorrectly,useslowdrythinner.E)保持底材干净。)Keepmaterialsclean.6/29/202
7、113鱼眼/FishEyes(cissing)好可爱噢,真的象鱼眼睛呢!6/29/202114产生鱼眼的原因(cause):放大之后中间有核,通常是*素材被含硅silicon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。6/29/202115预防(PREVENTION)鱼眼的产生KeepthepartawayfromsiliconepollutionThoroughlycleanthesurfacewithwaxandgreaseremover.Donotallowcleaningsolven
8、tstodryonthesurfacebutremovewithacleandrycloth,Alwaysusetherecommendedmaterials.Ensurethatthesprayingareaisproperlyventilate
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