Driving device for cold cathode lamp tube powdering machine

Abstract

The invention discloses a driving device for a cold cathode lamp tube powdering machine. The driving device comprises a rail which is positioned in a powdering machine shell and connected with a chuck of the rail through a shaft and rotates around the circle center of the shell, and an operating window formed on the shell; the shaft of the chuck is rotationally connected with the rail; a driving wheel is arranged on the shaft; the driving wheel is in driving connection with a drive wheel through a driving belt; and a wheel shaft of the drive wheel is movably connected with the shell. In the driving device, the shaft of the chuck is rotationally connected with the rail and is provided with the driving wheel connected with the drive wheel through the driving belt, so a lamp tube can revolve one circle around the circle center of the shell and rotate with the rail when the lamp tube of which the inner wall is coated with slurry is clamped on the chuck. Due to a centrifugal force produced by rotation, residual slurry on the inner wall of the tube is thrown away from the tube quickly; therefore, the consistency of the thickness of the slurry on the inner wall of the tube and the quality of the lamp tube can be guaranteed.

Description

Technical field: [0001] The invention relates to a production device of an electric light source, in particular to a powder coating machine which is a key equipment in the manufacture of cold cathode lamp tubes. Background technique: [0002] In the production process of cold cathode lamps, the most important process is to apply powder to the open tube (coat fluorescent powder slurry on the inner wall of the lamp tube), and the lamp tube coated with powder slurry needs to be carried out at an appropriate temperature and within a specified time dry. The quality of the powder coating directly affects the yield of the subsequent workshops. If the powder coating is not good, the phosphor powder must be washed off and re-coated, which not only increases the cost, but also wastes manpower and time. At present, the powder coating method of the cold cathode lamp tube is to use a pump to blow the powder slurry from one port of the lamp tube, and then hang the lamp tube vertically on...

AI Technical Summary

Problems solved by technology

From the above-mentioned heating and drying process, it can be seen that the lamp tube suspended on the chuck is statically revolving with the orbit for one revolution (it does not rotate by itself). Practice has proved that the defects of this drying method are: The excess slurry flows down slowly by gravity. Therefore, the result is that the thickness of the slurry in the lower part of the lamp tube is thicker than that in the upper part of the lamp tube, and the consistency of the thickness of the powder layer on the tube wall cannot be guaranteed, resulting in The later lamps have quality problems such as low luminous efficiency and large light decay.

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