KR920007424B1 - Method of cleaning panel pin for crt and apparatus of the same - Google Patents

Abstract

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Description

Panel pin cleaning method of color water pipe and cleaning device

1 is a flowchart of a process applied to the method for cleaning panel pins of a color water pipe according to the present invention.

2 is a block diagram of a panel pin cleaning device of the present invention.

Figure 3 is an explanatory diagram of the correlation between the nozzle cap and the panel pin in the panel pin cleaning device of the present invention.

* Explanation of symbols for main parts of the drawings

1 carrier 2 panel

4: movable base 5: roller

6: panel sealing surface 13: nozzle cap

15: Panel pin 16: Nozzle

17: House

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning panel pins of a color water pipe, in which a graphite liquid adhering to the panel pins is removed, and a washing apparatus thereof.

Usually, the fluorescent surface of a color receiving tube is comprised by the graphite film, the fluorescent material layer which has three kinds of light emission color, and the very thin aluminum reflecting film provided on this fluorescent layer as a light absorption film for improving the contrast of an image.

In forming the graphite film of the first layer, first, a resist stripe or a resist dot is formed on the inner surface of the panel, and then the graphite liquid is sprayed over the entire inner surface of the panel. Therefore, the panel pin for attaching the shadow mask provided on the side wall of the panel is applied. Graphite adheres and remains on the surface of Since the spring of the shadow mask is fitted to the panel pin, the graphite adhered to the surface of the panel pin is scraped and becomes conductive dust in the water pipe, causing sparks in the pipe or poor loading of the shadow mask.

Therefore, as a method of removing graphite of the panel pins, a method of cleaning the surface of the panel pins with a rotating brush and mechanically cleaning them, or as disclosed in Japanese Patent Laid-Open No. 62-219436, uses a sponge roller as a method for removing graphite. The method of removing the coating liquid by pressing on, and removing the coating liquid is used.However, the electronic method consumes a great amount of brush, and the maintenance of the device is cumbersome. In the latter method, there is a problem of generating a defect in the matrix surface, and in the latter method, the sponge roller is weakened and the exchange or the device is complicated. There was a flaw such as the liquid blade is easy to occur.

The conventional panel pin cleaning device is configured such that a cleaning member such as a rotary brush or sponge roller is brought into contact with the panel pins. Therefore, it is necessary to replace it according to the consumption of the panel pin cleaning device. Since it is a method of removing or contacting to remove, there are some problems such as liquid blades or dust blades.

An object of the present invention is to solve the above problems by removing the graphite liquid attached to the surface of the panel pin by a simple method and at the same time to minimize the maintenance of the device panel pin cleaning method of the water pipe and its cleaning device To provide.

In the method for cleaning the panel pin of the color water tube according to the present invention, the graphite liquid is applied, the excess liquid is removed, the inside of the screen is slightly heated, and the inner surface of the panel is stopped to the right position. The aqueous solution was made to drain from the nozzle provided so that the graphite liquid attached to the fins could be washed off.

In the method of cleaning the panel pins according to the present invention, the graphite liquid, which remains in a large amount by the surface tension at the peripheral edge of the panel pins after the graphite is applied, is removed by using an aqueous solution in a time when it is not dried. Graphite does not remain, and since there is no structural member to be worn or weakened as a device, it is excellent in water retention.

The structure of this invention is demonstrated with an Example.

1 is a flowchart of a process applied to the panel pin cleaning method of the color water pipe according to the present invention. First, the pixel pattern of a resist film is provided in the inner surface of the face panel 2 for color receiving tubes. Next, in a plurality of wide-angle spray nozzles 16 which face the center portion of the panel while rotating the inner surface inclined downward to the panel, the pixel pattern surface of the resist film formed on the portion of the panel inner surface to be the screen. Spray coating the graphite liquid on the entire surface including a. Next, the number of revolutions of the panel is increased to discharge (remove) excess graphite liquid from the inner surface of the panel by centrifugal force. Thereafter, the rotation speed is reduced to about 30 rpm, and gradually heated by an infrared heater for 10 to 40 seconds to suppress the fluidity of the graphite film in the screen. Thereafter, the carrier 1 holding the panel is fixed in position directly downward. At this point in time, the amount of the graphite liquid remaining on the surface of the panel pins is very large compared to the inside of the screen, so that it is not dried and is in a wet state. Then, when the inside of the panel is turned downward and the aqueous solution flows about 5-10 ml with several panel pins, the graphite liquid is washed out. Thereafter, the inner surface of the panel and the panel pins are completely dried with an infrared heater.

As a result, the amount of graphite remaining on the panel pins does not generate dust of graphite by attaching and detaching at least the mask spring.

2 is a block diagram showing an embodiment of a panel pin cleaning device of the present invention.

In the drawing, when the panel 2 held on the carrier 1 rotates to the panel pin cleaning position and starts to rotate the graphite-coated panel 2 at just 10 rpm downward, the air cylinder 3 moves on the movable base. (4) is raised and stopped where the positioning roller 5 is in contact with the sealing surface 6 of the panel 2. Thereafter, when the air cylinder 7 is operated and the carrier positioning arm 8 is lowered, the positioning pin 9 of the rotating carrier 1 touches the arm 8 to stop the rotation. Next, when the air cylinder 10 rotates the expansion shaft 11, the lever 12 connected thereto pushes the nozzle cap 13 along the guide rail 14 to the side wall around the panel pin 15. Stop by touching. Subsequently, the aqueous solution guided by the hose 17 flows about 5 to 10 ml at the front end of the nozzle 16 having an inner diameter of 3 mm provided through the nozzle cap 13 to wash the panel pin 15.

A solenoid valve (not shown) is connected to the hose 17 for supplying the aqueous solution, and when it is closed after washing for about 6 seconds, the above-described mechanisms reversely operate sequentially, and the movable base 4 ) Is released from the panel 2 and lowered to return to the reference position. This completes the one-cycle fin washing step, and the carrier 1 again moves to the drying position by the next infrared heater.

FIG. 3 is a partially enlarged view for explaining the interrelationship between the nozzle cap 13 and the panel pin 15 in the panel pin drawing device of FIG. 2, and the structure of the nozzle cap 13 has the panel pin 15 at the tip end thereof. It has a recessed part 13a deeper than the height in the side wall of the panel 2, and the nozzle 16 for discharging aqueous solution is provided in this recessed part 13a. In other words, when the nozzle cap 13 is moved forward and pressed against the side wall of the panel, the nozzle cap 13 is in contact with the U-shape 2a surrounding the panel pin 15, as indicated by the two-dot chain line. Therefore, since the space for washing the panel pins 15 is in a structured state separated from the screen side of the panel 2, the aqueous solution guided by the hose 17 is discharged from the front end of the nozzle 16 and the panel pins ( Fly and scatter while touching 15), this does not create a defect on the screen.

The effects obtained by the representative of the inventions disclosed in this document are briefly described as follows.

That is, according to the present invention as described above, after the graphite liquid is plotted, the aqueous solution surrounding the panel pins is discharged by the nozzle cap so as to clean and remove the graphite liquid in a state where the panel pins are not dried. There is no problem of abrasion, weakening, etc., and the cleaning effect is good, and there is an effect of remarkably improving the breakdown voltage performance.

Claims (2)

A step of providing a pixel pattern of a resist film on the inner surface of the face panel 2 for color receiving tubes, and a plurality of wide-angle spray nozzles 16 facing the central portion of the panel while rotating the inner surface of the panel obliquely downward. Spray-coating a dispersion of graphite in sequential steps, and then increasing the rotational speed of the panel to remove excess of the graphite liquid coated on the inner surface of the panel by centrifugal force, lowering the rotational speed of the panel by using an infrared heater for 1 to 40 seconds. Step to heat. Afterwards, the carrier 1 holding the panel is fixed directly in the downward position. At the nozzle 16 approaching the panel pin 15, the aqueous solution flows on the surface of the panel pin in the wet state by the graphite liquid. And a step of washing and removing the graphite liquid attached to the fin, and finally, a step of drying the panel surface and the panel fin with an infrared heater. A plurality of panel pins (15) from the roller (5) for determining the height of the panel sealing surface (6), the carrier positioning arm (8) for determining the direction of the panel pin (15), and the center of the panel. The retractable nozzle cap 13, which is pressed in contact with the side wall of the panel so as to surround the pin, the nozzle 16 provided through the nozzle cap, and the movable base 4 holding the above mechanism. A panel pin cleaning apparatus for a color water pipe, which has a mechanism for fixing and a fixed base mechanism for supporting them.

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