涂装常见缺陷分析

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9
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,
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4
起泡(blowing):
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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。
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起泡的原因:
底下有 Money!
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2
漆膜硬度不够(wБайду номын сангаасak):
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。
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3
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: 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。
14
预防(PREVENTION)鱼眼的产生
a) Keep the part away from silicone pollution
b) 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,
7
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
9/25/202f0ilm.
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10
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,
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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。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.
c) Always use the recommended materials. d) Ensure that the spraying area is properly
ventilated.
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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?
wet films. Allow sufficient 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.
8
溶剂泡(Solvent Popping )
起因(CAUSE)
Air or 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, heat source too close to the film, too hot, or applied too soon.
MODULE NAME
涂装常见缺陷分析
MODULE NUMBER
G3
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)
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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.
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12
鱼眼/ Fish Eyes (cissing)
好可爱噢, 真的象鱼眼睛呢!
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13
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。
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