A method for evenly coating fluorescent powder on a spiral fluorescent lamp tube

Abstract

The invention relates to a method for evenly coating fluorescent powder on a spiral fluorescent lamp tube. A functional device with rotation and revolution is adopted to make the fluorescent powder slurry layer in the spiral curved glass tube evenly coated and slowly solidified, and the normal temperature air is used as a moisture absorbing method. Infrared radiation, drying in an oven and reciprocating flow of circulating air are used to dry and reinforce the coating process to ensure that the phosphor layer is not too thick and has a uniform thickness, which is conducive to ensuring the quality of spiral fluorescent tubes and can be improved by at least 3 More than 100% of the luminous efficiency, save more than 10% of the phosphor, and the device can be equipped with a considerable number of spiral curved glass tube mounting supports in the form of multiple heads and multi-stations, slow rotation, sequential operation, and cyclic operation, greatly improving It improves work efficiency and product quality, avoids the special hot air dehumidification process of about 90°C in the prior art, reduces the production cost of the product, and has many advantages such as reliable operation, convenient use and obvious energy saving effect. Remarkable economy and strong practicality.

Description

technical field [0001] The invention relates to the technical field of fluorescent tube manufacturing technology, in particular to a method for evenly coating fluorescent powder on a spiral fluorescent tube. Background technique [0002] Among the high-power fluorescent tubes, the spiral fluorescent tube is favored by the market because of its energy saving, good lighting effect, compact structure, small size, high power and wide application range. In the manufacturing process of spiral fluorescent lamps, the process difficulty of evenly setting a phosphor layer on the inner wall of the spirally curved glass tube is the most difficult among all types of fluorescent lamps, and it is a major subject that manufacturers are currently studying to overcome. In the prior art, it is common to first pour phosphor slurry into the spirally curved glass tube, and then lower the end of the spirally curved glass tube to allow the excess phosphor slurry to flow out naturally under the acti...

AI Technical Summary

Problems solved by technology

The method of allowing the excess phosphor paste to flow out naturally under the action of gravity will inevitably lead to the following consequences: first, the formed phosphor layer is thick and uneven, and often results in local areas that are extremely thick or even piled up; second, Since the coating is thick and uneven, it will inevitably lead to low overall luminous efficiency and uneven illumination brightness, so it is difficult to guarantee the quality of new products; third, there is a serious waste of fluorescent powder, and it must be filled with a special 90 ° C heat Air, the additional cost is high; the fourth is that the overall production efficiency is low, it takes time to carry out the process of naturally flowing out the excess phosphor slurry, and it must be accompanied by the process of removing the phosphor layer accumulated at the nozzle.

Therefore, the cost of the product is relatively high, and the quality is difficult to guarantee. From the perspective of practicality and economy, the production process of the prior art coating spiral fluorescent tube phosphor layer is not ideal.

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