研究了凹版印刷机用铝导向辊的阳极氧化工艺，获得了较佳的工艺条件：H2SO4含量180~200 g/L，Al3+<20 g/L ，添加剂R 10~15 g/L，电流密度范围0.8~3.0 A/dm2，氧化温度10~30°C，氧化时间60 min，压缩空气搅拌压力0.08~0.10 MPa。该工艺已正常运转3 a，日产量达到2000 dm2左右，所生产的铝导向辊的硬度、厚度、耐磨性以及表面状况符合用户要求，不合格率为3%以下，完全可以取代进口导向辊，获得了可观的经济效益。
The anodizing process of aluminum guide roll used for gravure printing machine was studied. The optimal process conditions were obtained as follows: H2SO4 180-200 g/L, Al3+<20 g/L, additive R 10-15 g/L, current density 0.8-3.0 A/dm2, oxidation temperature 10-30 °C, oxidation time 60 min, and stirring by compressed air 0.08-0.10 MPa. The process has normally run for three years with a daily yield of ca.2 000 dm2. The hardness, thickness, abrasion resistance, and appearance of the produced aluminum guide roll meet the users’ requirements, and the fraction defective is below 3%. The aluminum guide roll prepared by the process can completely replace the imported products, obtaining good economic benefit.
参考文献
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