資源描述：
《涂裝常見缺陷分析ppt課件》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、涂裝常見缺陷分析G3MODULENAMEMODULENUMBER6/29/20212漆膜缺陷原因分類:涂料問題(Productproblems)應(yīng)用不良(Applicationproblems)設(shè)備因素(Equipmentproblems)環(huán)境因素(EnvironmentCause)顏色問題(Colourproblems)6/29/20213漆膜硬度不夠（weak):描述(DESCRIPTION)表現(xiàn)為漆膜軟,很容易被劃傷；相應(yīng)的耐溶劑性能表現(xiàn)差。6/29/20214原因（cause)：通常是漆膜樹酯交鏈不夠好，而交鏈不夠的主要因素有：１樹酯分子選擇不合適
2、；２未完全干燥；３高溫漆或雙組份漆烘烤溫度不夠；４雙組份漆固化劑配比不對(duì)。6/29/20215起泡（blowing)：6/29/20218溶劑泡（SolventPopping）描述（DESCRIPTION）新噴漆膜表面有直徑小于1MM的小氣泡。Opentoppedblistersupto1mmindiameteronthesurfaceofthemostrecentlyappliedpaintfilm.6/29/20219溶劑泡（SolventPopping）起因（CAUSE）Airorsolventvapourtrappedbyfastdryingpai
3、ntformingaskin.Thismaybedueto:a)天那水太差或太快干。poorqualityortoofastthinner.b)噴得太厚或兩層漆之間干燥時(shí)間不夠。excessivefilmthickness,orinsufficientdryingtimebetweencoats.c)壓縮空氣壓力太低。compressedairpressuretoolow.d)加熱太快。dryingtemperaturetoohigh,heatsourcetooclosetothefilm,toohot,orappliedtoosoon.6/29/2021
4、10溶劑泡（SolventPopping）預(yù)防（PREVENTION）a)確保工件表面清潔Ensurethatthesurfaceisscrupulouslyclean.b)使用合適的天那水。Useonlyrecommendedthinner.c)每層漆膜厚度合適，并適當(dāng)閃干Applypaintinthin,wetfilms.Allowsufficientdryingtimebetweencoats.d)使用正確的噴漆壓力Usecorrectcompressedairpressure.e)烘烤前適當(dāng)流平，避免加熱過快，熱源過近。Allowsufficien
5、tflashofftimebeforeforcedrying,ensurethatthecorrectdryingtemperatureisnotexceeded.Donotallowtheheatsourcetobeplacedtooclosetothesurface.6/29/202111針孔（Pinholing）描述（DESCRIPTION）小凹穴，通常直徑小于1MM。Smallcavities,generallylessthan1mmindiameter,6/29/202112針孔（Pinholing）預(yù)防（PREVENTION）a)一次不要噴得太
6、厚。Donotspraytoothickonetime,b)烘烤之前適當(dāng)流平。Flashingthefilmbeforebaking.c)使用涂料廠商推薦的附料。Useonlyrecommendedmaterials.d)正確調(diào)配油漆，使用較慢干稀釋劑。Mixthepaintcorrectly,useslowdrythinner.E）保持底材干凈。)Keepmaterialsclean.6/29/202113魚眼/FishEyes(cissing)好可愛噢，真的象魚眼睛呢！6/29/202114產(chǎn)生魚眼的原因(cause)：放大之后中間有核,通常是*素材被
7、含硅silicon類的物質(zhì)污染。*素材未很好清潔。*裸手接觸工件。*油漆一次噴涂太濕。*油漆體質(zhì)敏感。6/29/202115預(yù)防(PREVENTION)魚眼的產(chǎn)生KeepthepartawayfromsiliconepollutionThoroughlycleanthesurfacewithwaxandgreaseremover.Donotallowcleaningsolventstodryonthesurfacebutremovewithacleandrycloth,Alwaysusetherecommendedmaterials.Ensurethatt
8、hesprayingareaisproperlyventilate
