Optical glass surface ultra-clean cleaning method

Abstract

The invention provides an optical glass surface ultra-clean cleaning method. The method includes the following steps that glass is soaked in normal temperature water firstly, then the glass is washedby a 1-3% citric acid aqueous solution, pure water, a 2-3% water-based environment-friendly cleaning agent and a 1-2% water-based environment-friendly cleaning agent sequentially under the conditionsof ultrasonic waves and the temperature between 40 DEG C and 60 DEG C, then the glass is sprinkled by normal temperature pure water and rinsed multiple times by pure water under the conditions of theultrasonic waves and the temperature between 40 DEG C and 60 DEG C, then the glass is descended into water at the high speed of 30 mm / s and lifted out of the water at the low speed of 4 mm / s, and finally moisture on the surface of the glass is dried away through a tunnel drying machine. The method is simple and practical, abrasive powder and other dirt are more easy to remove in an acid-base alternating processing mode, a cleaning effect and cleaning efficiency can be improved, meanwhile, manual brushing operation is substituted, manpower cost expenditure is reduced, the slowly-pulling water leaving speed and tunnel furnace drying are controlled in cooperation, secondary pollution is reduced, and the cleanliness of the surface of the glass is guaranteed.

Description

technical field [0001] The invention relates to the technical field of glass production, in particular to a method for super-cleaning the surface of optical glass. Background technique [0002] Due to its application requirements, optical glass must meet the requirements of no dirt residue on the surface under visual observation and pass relevant reliability tests. With the continuous development of technology, the performance requirements of the market and customers for optical glass are also increasing. For example, products in Avoid birefringence when detecting under a polarizing microscope. According to research and analysis, more than 70% of the poor birefringence problems are caused by the glass surface not being cleaned. The grinding powder and dust particles remaining on the glass surface will block the ion exchange during the subsequent glass chemical tempering process, resulting in The uneven local stress of the glass leads to birefringence, which is not conducive...

AI Technical Summary

Problems solved by technology

According to research and analysis, more than 70% of the poor birefringence problems are caused by the glass surface not being cleaned. The grinding powder and dust particles remaining on the glass surface will block the ion exchange during the subsequent glass chemical tempering process, resulting in The uneven local stress of the glass leads to birefringence, which is not conducive to the quality control and improvement of products

[0003] The reason for the above phenomenon is that the traditional optical glass cleaning method usually uses manual scrubbing and various environmentally friendly cleaning agents. Since the cleaning agent used is single and basically alkaline, not only cannot effectively remove different types of dirt, but also for Alkaline powder removal ability is not strong, it needs to be cleaned repeatedly, the sewage is large, and the consumables are large; in addition, the operation of manual scrubbing is uncertain, which not only increases a lot of labor costs, but also the cleaning effect of the product is not good. Stable, minor scratches on the surface are inevitable

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