Defects in the lacquer image印刷疵点说明.ppt

* Defects in the lacquer image上漆中存在的问题 Training for production staff 生产部门培训 Defects in the lacquer image上漆中存在的问题 Defects occur during each production run. To recognise these defects and to eliminate them with economic expenditure needs the knowledge of the defects and their reasons. 批量生产中会产生瑕疵。认识并消除瑕疵需要了解 问题及其产生原因 Exercise in teamwork: 分组练习： 2. Which defects do you know with the stamping foil? 你知道哪些烫印箔有关的瑕疵？ During which working steps can defects occur? 哪些工序会产生瑕疵？ Appearance of defects瑕疵表现 Defects in the lacquer image Defects manifest itself as: 瑕疵分类： optical defects 视觉瑕疵 off-colour 断色 Defects in the coating 涂层瑕疵 Defects of the foil 薄膜瑕疵 stamping defects 压烫瑕疵 Foil stamps too soft / too hard 压烫过轻/过重 Foil shoes poor hiding power 膜鞋覆盖力不足 wrong dimensions 尺寸错误 measurements requested are note kept 未遵循尺寸要求 Defect enumeration瑕疵列举 Defects in the lacquer image On the basis of defect samples the following defects are to be examined : 以下瑕疵可在错样上检查出： 1. Screened lines 印刷辊条纹 2. Voids 空档 3. Blade lines 刀纹 4. Wrinkles 皱褶纹 5. Holes 洞孔 6. Chatter marks 规则间歇纹 7. Scratches 擦损 8. Water marks 水渍 Teamwork / Reasons for defects分组练习/瑕疵原因 Defects in the lacquer image Which reasons do the single defects have? 瑕疵产生原因？ Defect elimination消除瑕疵 Defects in the lacquer image How can you eliminate the defects described? 你将如何解决上述瑕疵问题？ Defect detection I瑕疵检测 I Defects in the lacquer image With the naked eye 裸眼检查 take one point on the foil and follow it. 薄膜上取点跟踪。 Thus you can com-  pensate the foil speed  after some exercise. 练习后补偿薄膜速度 This only works with  speeds until 100m/min. 在速度100米/分钟时进行 Defect detection II瑕疵检测 II Defects in the lacquer image With the stroboscope 频闪观测仪 switch on the  stroboscope lamp 打开频闪观测仪 direct the ray on the foil so  that the reflection gives a  “standing” picture of the  foil. 光束打向薄膜，以便得到“ 停滞”画面 Defect detection III瑕疵检测III Defects in the lacquer image With the electric torc