Shadow mask type plasma display fluorescent powder constant-temperature and constant-pressure spraying device

Abstract

A phosphor constant temperature and pressure spraying device of a plasma display panel with shadow mask belongs to plate television manufacturing equipment, which includes a spray gun (1) and a slurry tank (9). The slurry tank (9) is connected with a feed port (10), an exhaust port (11) and a material discharging port (12). The feed port of the spray gun (1) is respectively connected with a compressed air source (8) and the slurry tank (9) and is characterized in that the tank wall of the slurry system tank (9) is a double-layer structure. Liquid medium is arranged in the tank wall and is connected with a heat exchange system (2). The compressed air source (8) is communicated with the space on the upper part of the liquid in the slurry tank (9) through an air pipe. The air pipe is equipped with a constant pressure valve (6). A stirring shaft (3) is installed in the slurry tank (9) and is driven by a stirring motor. The present invention solves a problem that a present spraying system sprays unevenly and has the advantages of simple structure and good spraying effect.

Description

technical field [0001] The invention relates to a spraying device, in particular to a phosphor powder spraying device used in the manufacturing process of a flat panel display, in particular to a constant temperature and constant pressure phosphor powder spraying device for a shadow mask plasma display. Background technique [0002] As we all know, in the SMPDP phosphor powder spraying process, due to the large specific gravity of the phosphor powder, it is easy to precipitate in the ethanol slurry. During the spraying process, if a certain stirring speed is not maintained, it is difficult to guarantee the uniformity of the slurry. Once the phosphor settles, it is easy to block the spray gun. Moreover, the temperature has a great influence on the viscosity of the slurry. To obtain the best spraying effect from the spray gun, it must be obtained under the condition of constant viscosity. Therefore, it is very important to keep the temperature constant. In addition, the amou...

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Problems solved by technology

[0003] The object of the present invention is to design a constant temperature and pressure constant temperature and pressure uniform phosphor powder constant temperature for the shadow mask type plasma display to solve the problem of uneven spraying caused by a series of problems such as temperature, pressure and stirring in the existing phosphor powder spraying. Constant pressure spraying device

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