KR940016377A - Foshan automatic feeder for CRT screen process - Google Patents

Abstract

The present invention relates to an apparatus for automatically supplying hydrofluoric acid, which is used for pre-treatment of a CRT panel on which a screen is to be formed in a CRT screen process. The main tank (1) to which a hydrofluoric acid liquid having a prescribed concentration is supplied and stored, and one side thereof. The hydrofluoric acid solution from the panel washing chambers 17, 18 and 19 is recovered from the control chamber, and a controlled amount of hydrofluoric acid solution is continuously supplied from the main tank 1 continuously in consideration of the concentration change of the recovered hydrofluoric acid solution. In the configuration including a first tank (8) to be used, and a second tank (10) for receiving the hydrofluoric acid solution from the first tank (8) and supplying it to the panel washing rooms (17) (18) (19). By maintaining constant concentration of hydrofluoric acid automatically throughout the operation of the device, it is possible to improve the processing quality of the panel, and to improve related work efficiency and hydrofluoric acid use efficiency with automated efficient hydrofluoric acid supply circulation system. Not only It shall provide effects that you can minimize the risks on the job.

Description

Foshan automatic feeder for CRT screen process

Since this is an open matter, no full text was included.

1 is a configuration diagram of an automatic hydrofluoric acid supply device according to the present invention, Figure 2 is a circuit diagram of the supply of hydrofluoric acid in the above apparatus.

Claims (6)

The main tank 1 to which the hydrofluoric acid liquid having a prescribed concentration is supplied and stored, and the hydrofluoric acid liquid from the panel washing chambers 17, 18 and 19 are recovered from one side, and the control considering the concentration change of the recovered hydrofluoric acid liquid is carried out. The first tank 8 to which a fixed amount of hydrofluoric acid solution is continuously and quantitatively supplied from the main tank 1, and the hydrofluoric acid liquid from the first tank 8 are accommodated, and each panel washing chamber 17 and 18 are housed. Foshan automatic supplying device for a CRT screen process, characterized in that it comprises a second tank (19) to supply to (19). 2. The first and second reduced pressure water (4) (5) according to claim 1, wherein the hydrofluoric acid pressure from the main tank (1) is decompressed to an appropriate level between the main tank (1) and the first tank (8). And a supply line 7 having a fixed quantity supply means 6 for regulating and supplying the reduced pressure hydrofluoric acid liquid to the first tank 8 side in a controlled amount again, the automatic supply of hydrofluoric acid for CRT screen process Device. The method of claim 1, wherein the hydrofluoric acid used in the first panel washing chamber 17 of the panel washing chambers (17), (18) (19) passes through a third tank (24) provided with a filter means. 8) Foshan automatic feeder for CRT screen process, characterized in that installed to recover. The CRT according to claim 1, wherein all of the hydrofluoric acid used in the panel washing rooms (17) (18) (19) is recovered to the first tank (8) via the third tank (24). Foshan automatic feeder for screen process. The hydrofluoric acid screen for CRT process according to claim 2, characterized in that the first pressure reducing means (4) is a pressure reducing valve, the second pressure reducing means (5) is a pressure reducing orifice, and the fixed quantity feeding means (6) is a fixed quantity feeding pump. Auto Feeder. The concentration measurement according to any one of the preceding claims, wherein the concentration of hydrofluoric acid flowing in the supply line 9 can be measured on the supply line 9 between the first and second tanks 8 and 19. The means 25 is provided so that the quantitative supply means 6 automatically adjusts the amount of hydrofluoric acid supplied to the axis of the first tank 8 in accordance with the result of the concentration measured at that time through the concentration measuring means 25. Foshan automatic feeder for CRT screen process, characterized in that the. ※ Note: The disclosure is based on the initial application.