Dust-free drying trough

Abstract

The invention provides a dust-free drying trough. A draught fan and an efficient air filtering element are additionally arranged above the drying trough, so that clean air is always delivered to a lens drying region. A time relay is additionally arranged, so that the dwell time of a lifting frame in a condensing region can be adjusted and controlled, and the drying effect is enhanced. A bottom heat conducting oil region is sealed, a hole is formed in a part close to the upper end, and the hole is connected with an outdoor exhaust pipe for exhausting. The fixing standard of the liquid level of the drying trough is that: the distance between a lens and the liquid level is 5-15cm. By improving the drying trough, drying function and conditions are improved, the time control of the condensing region is adjustable, the height of the liquid level of the drying trough is examined and checked at fixed time and spots, air in the condensing region is kept clean and is free of pollution, a great drying effect is realized, the unqualified rate of products is reduced, and great economical benefits are created.

Description

technical field [0001] The invention relates to the technical field of lens production, in particular to lens drying equipment. Background technique [0002] In the ultrasonic cleaning of lenses, drying is a very important link, but there are some problems in the current cleaning and drying tanks that cause great trouble to the cleaning effect, and produce a lot of defective products caused by drying, causing huge economic losses to the company. The disadvantages are as follows: 1. After the lens with a large outer diameter is dried, there will be a certain proportion of dust spots. 2. After the lenses are dried, there will be a certain proportion of watermarks in each basket. Some pre-coating inspections cannot be found with the naked eye. 3. When the heat transfer oil is heated, the oil gas floats into the air and spreads to the dry area, resulting in water drop corrosion. 4. The IPA liquid level in the drying tank changes with time, resulting in watermarks. Contents o...

AI Technical Summary

Problems solved by technology

[0002] In the ultrasonic cleaning of lenses, drying is a very important link, but there are some problems in the current cleaning and drying tanks that cause great trouble to the cleaning effect, and produce a lot of defective products caused by drying, causing huge economic losses to the company. Disadvantages: 1. After the lens with a large outer diameter is dried, there will be a certain proportion of dust spot-like dirt

2. After the lens is dried, there will be a certain proportion of watermark in each basket. Some pre-coating inspections cannot be found with the naked eye. After coating, it will become a bad watermark under the film.

3. When the heat transfer oil is heated, the oil gas floats into the air and spreads to the dry area, resulting in water drop corrosion

4. The IPA liquid level in the drying tank changes with time, resulting in watermarks

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