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1、9/16/2018,Prepareed by: Liu Chenzhong,2,漆膜缺陷原因分类:,涂料问题(Product problems) 应用不良(Application problems) 设备因素(Equipment problems) 环境因素(Environment Cause) 颜色问题(Colour problems),9/16/2018,Prepareed by: Liu Chenzhong,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。,9/16/2018,Prepareed by: Liu Che
2、nzhong,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。,9/16/2018,Prepareed by: Liu Chenzhong,5,起泡（blowing)：,9/16/2018,Prepareed by: Liu Chenzhong,6,起泡的原因(cause)：,通常是基底有锈迹(擴大）、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（受熱膨脹）时，这些物质彭涨将漆膜顶起造成。,9/16/2018,Prepareed by: Liu Chen
3、zhong,7,起泡的原因：,底下有Money!,9/16/2018,Prepareed by: Liu Chenzhong,8,溶剂泡（Solvent Popping ）,描述（DESCRIPTION） 新喷漆膜表面有直径小于1MM的小气泡。Open topped blisters up to 1mm in diameter on the surface of the most recently applied paint film.,9/16/2018,Prepareed by: Liu Chenzhong,9,溶剂泡（Solvent Popping ）,起因（CAUSE） Air or
4、solvent vapour trapped by fast drying paint forming a skin. This may be due to: a) 天那水太差或太快干。poor quality or too fast thinner. b) 喷得太厚或两层漆之间干燥时间不够。excessive film thickness, or insufficient drying time between coats. c) 压缩空气压力太低。compressed air pressure too low. d) 加热太快。drying temperature too high, he
5、at source too close to the film, too hot, or applied too soon.,9/16/2018,Prepareed by: Liu Chenzhong,10,溶剂泡（Solvent Popping ）,预防（PREVENTION） a) 确保工件表面清洁Ensure that the surface is scrupulously clean. b) 使用合适的天那水。Use only recommended thinner. c) 每层漆膜厚度合适，并适当闪干Apply paint in thin, wet films. Allow suff
6、icient drying time between coats. d) 使用正确的喷漆压力Use correct compressed air pressure. e) 烘烤前适当流平，避免加热过快，热源过近。Allow sufficient flash off time before force drying, ensure that the correct drying temperature is not exceeded. Do not allow the heat source to be placed too close to the surface.,9/16/2018,Pre
7、pareed by: Liu Chenzhong,11,针孔（Pinholing）,描述（DESCRIPTION） 小凹穴，通常直径小于1MM。 Small cavities, generally less than 1 mm in diameter,9/16/2018,Prepareed by: Liu Chenzhong,12,针孔（Pinholing）,预防（PREVENTION ） a)一次不要喷得太厚。Do not spray too thick one time, b)烘烤之前适当流平。Flashing the film before baking. c) 使用涂料厂商推荐的附料。
8、Use only recommended materials. d) 正确调配油漆，使用较慢干稀释剂。Mix the paint correctly, use slow dry thinner. E）保持底材干净。)Keep materials clean.,9/16/2018,Prepareed by: Liu Chenzhong,13,鱼眼/ Fish Eyes (cissing),好可爱噢， 真的象鱼眼睛呢！,9/16/2018,Prepareed by: Liu Chenzhong,14,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。
9、 *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。,9/16/2018,Prepareed by: Liu Chenzhong,15,预防(PREVENTION)鱼眼的产生,Keep the part away from silicone pollution Thoroughly clean the surface with wax and grease remover. Do not allow cleaning solvents to dry on the surface but remove with a clean dry cloth, Always use
10、 the recommended materials. Ensure that the spraying area is properly ventilated.,9/16/2018,Prepareed by: Liu Chenzhong,16,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？,9/16/2018,Prepareed by: Liu Chenzhong,17,与鱼眼相似的其它缺陷 2.油污(oil pollution),工件表面被轻质油污染.,9/16/2018,Prepareed by: Liu Chenzhong,18,起云
11、/斑纹,(Clouding / Mottling ),9/16/2018,Prepareed by: Liu Chenzhong,19,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）。,9/16/2018,Prepareed by: Liu Chenzhong,20,应力纹(mapping):,在5220机壳上常出现应力纹的地方,9/16/2018,Prepareed by: Liu Chenzhong,2
12、1,脏点/尘点/异色点(Dirt / threads / Bits),9/16/2018,Prepareed by: Liu Chenzhong,22,脏点/纤维/异色点（Dirt / threads / Bits）,9/16/2018,Prepareed by: Liu Chenzhong,23,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？,9/16/2018,Prepareed by: Liu Chenzhong,24,颗粒(particles)产生原因,素材本身灰尘未被去除； 油漆未过滤， 或滤网太粗或太脏；
13、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。,9/16/2018,Prepareed by: Liu Chenzhong,25,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。,9/16/2018,Prepareed by: Liu Chenzhong,26,当这类缺陷很多时， 怎么办？,What can I do?,9/16/2018,Prepareed by: Liu Chenzhong,27,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
14、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。,9/16/2018,Prepareed by: Liu Chenzhong,28,干喷/异常光泽低 （Dry spray/loss of gloss),描述（DESCRIPTION） 虽然漆膜表面光滑,但漆膜表面光泽异常偏低. Although apparently smooth and evenly applied, the surface lacks shine.,9/16/2018,Prepareed by: Liu Chenzhong,29,起因(CAUSE) Microscopic roug
15、hness of the surface which may result from: a)底漆太差或底漆未干就喷面漆. poor hold out of primer, or the application of topcoat over primer which is not thoroughly dry. b)稀释剂太差或加了不合适的添加剂. poor quality or incorrect thinner, or the use of additives in the paint. c) 素材前处理不当或喷漆手法不对. incorrectly prepared or poorly a
16、pplied paint. d) 素材质量太差application over a poor substrate. e) 高湿低温时漆膜干燥太慢. excessively slow drying due to high humidity or low temperature. f) 溶剂蒸气在漆膜表面冷凝. solvent fumes or exhaust gases attacking the surface. g) 表面被污染. surface contamination by wax, grease, oil, soap or water.,9/16/2018,Prepareed by:
17、 Liu Chenzhong,30,预防（PREVENTION ） a) 选择正确种类和比例的稀释剂Use the correct proportion of recommended thinner. b) 正确的喷漆手法: 枪距, 扇形, 气压Use correct spraying techniques, ensure that equipment is clean, set air pressure as low as possible, consistent with proper atomisation, spray from the correct distance. c) 使用合适的喷房, 确保喷房有良好的空气流通. Use a spray booth, and ensure that air circulation and extraction is at the correct velocity.,
