KR930000093Y1 - Device for emitting frit liquid of color cathode ray tube - Google Patents

Abstract

No content.

Description

Frit coating liquid metering device of color cathode ray tube

1A and 1B are panel configuration diagrams of a general color water pipe.

2a and 2b are channel configuration diagrams of a general color water pipe.

FIG. 3A is a configuration diagram of a conventional frit liquid applying device, FIG. 3B is an enlarged view of the state of the A-part nozzle of FIG. 3A being opened, and FIG. 3C is an enlarged view of the state of the A-part nozzle of FIG. 3A closed.

FIG. 4A is a view showing an application state at the initial start of the conventional frit liquid application device, and FIG. 4B is a view showing a state of application when the nozzle is gradually raised in the conventional frit solution application device, and FIG. 4d is a state in which frit liquid is applied to the channel.

FIG. 5A is a coating state in a state where the nozzle is normally opened and closed, FIG. 5B is a coating state in a state where the nozzle is gradually raised, and FIG. 5C is a coating state in a state where the nozzle is gradually lowered.

Figure 6a is the overall structural diagram of the subject innovation, Figure 6b is a detailed structural diagram of the subject innovation.

7 is a frit glass coating state according to the present invention.

* Explanation of symbols for main parts of the drawings

7: Chanel's cotton noodle 8: Frit glass coating liquid

10 tank 11: nozzle

13: speed variable motor 14: liquid stirring motor

15: screw for metered discharge 16: overfloor passage

17: left and right movable shutter opening and closing 17a: nozzle opening and closing shutter

17b: passage opening and closing shutter 18: cylinder

19: shutter opening 21: table rotation motor

The present invention relates to a color cathode ray tube frit coating device, and in particular, to eliminate the change of discharge amount due to the fluctuation of frit liquid at the beginning and the end of frit coating so that the finishing process of the operator is omitted so that it is suitable for the automation process and the productivity improvement for unmanning. A frit coating quantitative derivation device of a cathode ray tube.

The panel portion 1 as shown in FIG. 1 of the conventional general color cathode ray tube is composed of a shadow mask 2, a frame 3, a fluorescent film (not shown), and the like. Likewise, the channel part 4 is composed of an anode bottom (5), internal graphite (6), and channel rest surface (7). The panel (1) and the channel part (4) have a softening point of about 400 ° C. After the frit sealing process of fusion with the fritted glass coating liquid 8, which is a low melting point glass, a cathode ray tube is completed through an encapsulation process and an exhaust primary inspection by inserting an electron gun therein. As a device for applying the liquid 8, as shown in FIG. 3A, a tank 10 capable of holding the frit glass coating liquid 8 is provided, and frit through the nozzle 11 in the tank 10. There is a needle valve 12 for opening and closing the solution of the glass 8 so that the needle valve ( 12), the frit glass solution 8 in the tank is applied onto the channel resting surface 7 through the nozzle by the air pressure coming from the outside through the air hose 9.

However, according to this method, when the frit solution is applied, it becomes a factor that can change the coating amount according to the amount of liquid, and when the initial start proceeds in the closed state as shown in FIG. 3C, and becomes open as shown in FIG. Under the pressure P ₂ on both sides, the initial application state becomes as shown in FIG. 4A when the needle valve 12 increases in speed, and when the needle valve 12 is gradually raised, the nozzle diameter is gradually increased. This causes a lack of fritted glass liquid amount as shown in FIG. 4B.

On the other hand, at the end of frit coating, the portion A fritted glass solution 8 of FIG. 4B has a force of the cross-sectional area of the needle valve 12 to the actual pressure P ₁ due to the lowering of the needle valve 12. As shown in the figure, the discharge is excessive.

As described above, due to the excessive initial discharge amount (see FIG. 4A) and the discharge amount at the end (see FIG. 4C), too much frit liquid is generated, as shown in FIG. 5A, and the needle valve is started when starting. In case of rising slowly without sudden increase, excessive discharge amount at the end and lowering of the needle valve at the end as shown in Fig. 5b, it prevents perfect over ram at start and end due to excessive discharge amount at the start as shown in Fig. 5c. It is not possible to guarantee the perfect quality due to the problem of the structure of the needle valve or the method of opening and closing of the needle valve.

That is, as shown in FIG. 5, when the frit solution is excessively generated, that is, when the panel 1 is placed on the channel rest surface 7, the frit solution is overexposed to the outside of the panel and warnel contact surfaces, thereby degrading the quality.

In order to solve this problem, the present invention provides a frit glass coating device suitable for automated operation by eliminating the over-lapping phenomenon by eliminating the over-lapping phenomenon by almost overlapping the frit glass solution coating state at the start and the end. As it is intended to provide, it will be described in detail by the accompanying drawings as follows.

That is, as shown in FIG. 6A, a speed variable motor 13 and a liquid stirring motor 14 for stirring the fritted glass liquid 8 for adjusting the fritted glass liquid amount are provided, and these two motors 13 and 14 are provided. And a fixed quantity dispensing screw 15 for discharging fritted glass liquid into the fritted glass liquid 8 and the tank 10. The tank 10 has the fixed quantity as shown in FIG. An overfloor passage 16 is provided for automatically overflowing the frit glass liquid 8 when the discharging screw 15 is rotated and the nozzle 11 is closed. 16, the left and right movable opening and closing shutter 17 in which the passage opening and closing shutter 17b for opening and closing the nozzle 10 and the nozzle opening and closing shutter 17a for opening and closing the nozzle 11 formed at the lower end of the tank 10 are integrally formed. The passage opening and closing shutter 17b is formed by the action of the cylinder 18. When the block 16 is blocked, the shutter opening 19 of the nozzle opening and closing shutter 17a opens the passage of the nozzle at the nozzle 11 position, and the passage opening and closing shutter 17b opens the passage 16. The nozzle 11 is integrated so as to alternately operate in a closed state.

In addition, there is provided an optical sensor (not shown) for operating the cylinder 18 is configured to operate by the detection state of the frit glass liquid (8).

And the table rotation motor 21 for operating the initial cylinder 18 is provided to control the opening and closing of the nozzle 11 of the tank 10.

The operation and effects of the present invention configured as described above are as follows.

First, when the cylinder 18 is operated by driving the table rotating motor 21, the nozzle opening / closing shutter 17a is moved so that the shutter opening 19 is aligned with the nozzle 11, thereby simultaneously opening the nozzle 11 and simultaneously. The speed variable motor 13 and the liquid stirring motor 14 rotate the screw 15 for metering discharge in the tank 10 so that the frit glass liquid 8 is applied to the channel resting surface 7 through the nozzle 11. After the fritted glass liquid 8 is detected on the channel rest surface 7 by an optical sensor (not shown), the cylinder 18 is operated so that the nozzle opening / closing shutter 17a of the left / right movable opening / closing shutter 17 is right. The nozzle 11 is closed and the passage opening and closing shutter 17b is opened at the same time.

In the above operation, when time passes for about 20 seconds after the application of the fritted glass liquid 8, the fritted glass liquid 8 stops between the metered discharge screw 15 and the nozzle 11 to start fritted glass. In order to prevent this, the liquid shortage occurs, so that when the nozzle 11 is closed while the metering screw 15 is rotated, the overflow glass passage is automatically overflowed by the overfloor passage 16 to maintain a constant speed. To maintain.

That is, when the cylinder 18 is operated at the initial start in FIG. 6B, the nozzle opening / closing shutter 17a and the overpass passage 16b of the overfloor passage 16 are operated, and the shutter opening 19 opens the nozzle 11. The overflow passage 16 is closed by the passage opening and closing shutter 17b while the frit glass liquid 8 is applied to the channel rest surface 7.

After the application of fritted glass liquid by the above operation, the fritted glass coating liquid applied to the channel rest surface 7 is detected by an optical sensor (not shown). The nozzle 11 is closed, and the overfloor passage 16 is opened to continue rotating the screw 15 for metered discharge.

Applying fritted glass liquid by the device of the present invention enables the combination of the starting point and the ending point on the channel rest surface 7 to be less than 2 [mm] as shown in FIG. 7, and the nozzle opening / closing system is controlled by an optical sensor. After detecting the fritted glass liquid on the channel resting surface 7, it is fed back to the cylinder 18 and time-adjusted by a timer, and the overlap amount adjustment by a timer is attained.

Therefore, the present invention solves the conventional overlapping problem by using the opening and closing opening and closing system of the overlapping prevention nozzle at the start and end of the present invention, thus eliminating the need for the operator's finishing process, and thus enabling automation for unmanned operation. And there is usefulness that can be expected to improve the productivity and quality of frit glass liquid coating.

Claims (4)

In the frit glass coating device of a color cathode ray tube, a fixed quantity discharge screw 15 is provided in the tank 10 as a fixed quantity discharge device of said fritted glass coating liquid, and a speed for driving the fixed quantity discharge screw 15 is provided. Variable motor 13, a liquid stirring motor 14 for agitating the coating liquid, and a table rotating motor 21 for driving the cylinder 18 is provided, the fixed coating liquid fixed quantity discharge of the color cathode ray tube Device. The apparatus for discharging frit coating liquid of a color cathode ray tube according to claim 1, wherein the tank (10) is provided with an overfloor passage (16) integrally for overflooring the frit coating liquid. The frit coating liquid quantitative dispensing device of a color cathode ray tube according to claim 2, wherein the row line (11) and the overfloor passage (16) are provided with left and right movable opening and closing shutters (17) which alternately open and close them. The frit coating solution of the color cathode ray tube according to claim 3, wherein the opening and closing operation of the left / right movable shutter (17) is automatically controlled by an optical sensor detecting the frit glass coating liquid (8). Discharge device.