KR20010065866A - Apparatus for inspecting the shell cord of crt panel and control method thereof - Google Patents

Abstract

PURPOSE: A cord inspecting apparatus for a panel for a cathode rays pipe and there of method is provided to judge the cord badness of the panel by using a film member and a power source. CONSTITUTION: A solution tank(12) is arranged at a support part(11), having a cylindrical shape. The both sides of solution tank(12) made of a transparent member(14), which is arranged depart from each other. A source of light(16) irradiates a light from the solution tank(12) to the transparent member(14). A film member(43) is arranged at between the source of light(16) and the transparent member(14). The film member(43) is crossly arranged to a light transmission band and a light interception band. A refractive solution accepts in the solution tank(12) to impregnate a panel(10). A ratio of refraction(A) of refractive solution is same with a ratio of refraction(B) of the panel(10). An auto-throwing device(20) is installed both sides to upper end of the solution tank(12) to throw a panel(10) into the solution tank(12).

Description

Code inspection device for cathode ray tube panel and its method {APPARATUS FOR INSPECTING THE SHELL CORD OF CRT PANEL AND CONTROL METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a code inspection apparatus for a cathode ray tube panel, and more particularly, to a code inspection apparatus for a cathode ray tube panel for inspecting a cord, which is a kind of heterogeneous glass layer formed during the molding process of the cathode ray tube panel.

Cathode ray tubes generally have a panel on which an image is projected and a funnel-shaped funnel having an electron gun coupled to the back of the panel. The molding of such a panel is performed by pressing a glass raw material which is heated and melted in a glass melting furnace and provided in the form of a gob by a press molding apparatus.

In this way, the compression molded panel is a predetermined stud pin is fused by a stud pin fusion device for supporting the shadow mask, and then slowly cooled to a predetermined temperature condition through a slow cooling furnace, and then for each control point of the panel It is directed to the gauging process to measure the dimensions. After measuring the peripheral and peripheral dimensions from the gauge process, the panel is directed to the polishing process for polishing the end surface and the effective surface by a predetermined conveying means after the first appearance inspection, and finally released to the product through the inspection process. do.

By the way, conventionally, in the primary inspection for visual inspection of semi-finished products, there is no separate device for measuring the code defects, so-called line cords and shell cords, which may occur on the panel. There is a problem that it is very difficult to determine the exact code defects because only the naked eye can inspect. In addition, if a code defect occurs in the panel, if the first inspection does not find it immediately, the feedback (FEED-BACK) is delayed to the process that causes the problem, and as a result, the correction is delayed, resulting in a large process loss. .

Accordingly, it is an object of the present invention to provide a code inspection apparatus for a cathode ray tube panel which can determine a code defect of a panel.

1 is a perspective view schematically showing a code inspection apparatus of a panel;

2 is a front view of a solution tank,

3 is a view showing a relationship between the refractive index of the refractive solution and the refractive index of the panel to be inspected,

4 is a view showing another embodiment of FIG. 1,

5 is a diagram illustrating a light transmission band and a light blocking band of a panel.

* Explanation of symbols for the main parts of the drawings

10 panel 12 solution bath

16: light source 20: automatic injection device

22: guide portion 43: film member

The above object is, according to the present invention, in the code inspection apparatus of the cathode ray tube panel for inspecting the code defect formed in the cathode ray tube panel, having the upwardly open cylindrical shape of the two sidewalls spaced apart to face each other at a predetermined interval. A solution tank of which at least one region is made of a transparent member; A refractive solution accommodated in said solution tank to impregnate a panel to be inspected with a predetermined refractive index; A light source for irradiating predetermined light toward the transparent member from one side of the solution tank; It is achieved by the code inspection device of the cathode ray tube panel, characterized in that it comprises a film member disposed between the light source and the transparent member, the light transmission band and the light blocking band of the fine width alternately disposed.

Here, since the refractive index of the refractive solution is advantageously almost the same as the refractive index of the panel to be inspected, it may be used as benzyl alcohol. And, it may be configured to further include a guide means installed in the solution tank to guide and maintain the panel accommodated in the solution in a standing state.

The width of the light transmission band of the film member is preferably 30% of the width of the light blocking band, and the width of the light blocking band of the film member is advantageously at least 90 μm to 120 μm.

On the other hand, according to another field of the present invention, in the code inspection method of the cathode ray tube panel for inspecting the code defect formed in the cathode ray tube panel, the step of impregnating the panel of the inspection object in the refractive solution having a predetermined refractive index Wow; Arranging a film member having a predetermined width of a light blocking band and a light transmitting band disposed alternately on one side of the panel; Irradiating light to sequentially pass through the film member and the panel; It is also achieved by the code inspection method of the cathode ray tube panel, characterized in that it comprises the step of inspecting the cord formed on the panel.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As described above, the molding of the panel is performed by pressing the glass raw material which is heated and melted in the glass melting furnace and provided in the form of a gob by a press molding apparatus, and the compression molded panel is prescribed by a stud pin fusion apparatus for supporting the shadow mask. After the stud pins are fused, they are slowly cooled to a predetermined temperature condition through a slow cooling furnace, followed by a gauging process for measuring the dimensions of each control point of the panel, and after the visual inspection by the first visual inspection, The process is directed to a polishing process for polishing the end face and the effective face by predetermined transfer means.

At this time, the cord inspection apparatus according to the present invention performs a sampling inspection for extracting and inspecting only a few samples of a plurality of panels which are installed and molded before the panel goes to the polishing process, that is, immediately after the molding.

In the code inspection apparatus of the panel according to the present invention, as shown in FIG. 1, the sidewalls of the side wall spaced apart from each other at a predetermined interval are disposed on the support part 11 and have an upwardly open cylindrical shape. The solution tank 12 which consists of 14, the light source 16 which irradiates predetermined light toward the transparent member 14 from one side of the solution tank 12, and between the light source 16 and the transparent member 14; It has a film member 43 is disposed in the light transmissive band and the light blocking band of the minute width alternately formed. In the solution tank 12, a refractive solution is accommodated so as to impregnate the panel 10 to be inspected with a predetermined refractive index A.

As shown in FIG. 3, the refractive index A of the refractive solution has a state substantially equal to the refractive index B of the inspection panel 10. Thus, the refractive solution can be used benzyl alcohol (Benzyl Alcohol) or other solutions. At this time, in order to prevent the worker from directly contacting benzyl alcohol, the automatic input device 20 for introducing the panel 10 into the solution tank 12 is installed at the upper end from both sides of the solution tank 12, Guide portions 22 are provided on both sides of the solution tank 12 to guide and hold the panel 10 in an upright state.

The light source 16 irradiating predetermined light to the panel 10 to be inspected may be replaced with other light emitting materials, but preferably, a fluorescent lamp 16 is used. At this time, a plurality of fluorescent lamps 16 may be provided in the frame 17. And, in front of the frame 17, a locking roller 19 for holding and holding the film member 43 is provided.

In the film member 43 disposed between the light source 16 and the transparent member 14, the light transmission band D and the light blocking band C having a fine width are alternately arranged to form a film member ( On the circumferential surface of the 43, a rotating plate 44 using an acrylic material is provided to not only support the film member 43 but also maintain the light source 16 evenly. Therefore, the film member 43 is supported by the rotating plate 44 can be installed in the front locking roller 19 of the frame 17, the film member 43 to be relatively rotatable relative to the panel 10 to be inspected. do.

As shown in FIG. 5, the width of the light transmission band D of the film member 43 is 30% of the width of the light blocking band C, and the light blocking band C of the film member 43. Has a width of at least 90 µm to 120 µm.

On the other hand, as shown in Figure 2, the automatic injection device 20, a pair of the support frame 23 and the support frame 23 is placed upright from both sides of the wall of the solution tank 12, horizontally A slider 25 to be connected, a guide rod 27 coupled to both free ends of the slider 25 to guide the lifting movement of the slider 25, and an adjustment provided to the slider 25 to fix the panel 10. Possible fixing member 29 and control box 31 provided on one wall surface of solution tank 12.

In addition, a pair of rollers 33 spaced apart from each other by a predetermined distance is provided at an upper end of the upper support frame 23, and a driving motor 37 connected to the rollers 33 and the loop 35 on one side of the rollers 33. ) Is provided. In addition, one end of the chain 39, which is integrally connected to each roller 33, is fixed to the center region of the slider 25, and the other end of the chain 39 is disposed outside the support frame 23, and at the end thereof, a predetermined weight ( 41).

With this configuration, the code inspection method of the panel 10 will be described as follows.

First, the panel 10 to be inspected is placed under the slider 25 in an upright state, and then the panel 10 is fixed through a pair of fixing members 29 provided on the slider 25. After that, when driving the drive motor 37 by adjusting the control box 31, the roller 33 connected to the drive motor 37 and the loop 35 is rotated in one direction, and the weight in accordance with this As the 41 is moved upward, the slider 25 is guided by a pair of right and left guide rods 27 and moves downward. At this time, since the guide part 22 which stands | maintains the panel 10 is provided in the solution tank 12, when the slider 25 is down, the panel 10 is guided by each guide part 22 by the solution tank. It is possible to stand up within (12).

Next, when the rotary plate 44 having the film member 43 interposed in front of the light source 16 is applied and power is applied to the light source 16, the predetermined light passes through the film member 43. After irradiated with the transparent member 14 of 12) it passes through the effective surface of the panel 10. In this case, since the film member 43 is rotatable due to the rotating plate 44, when the light source 16 is uneven, the film 10 is inspected for code defects while the film member 43 is rotated by a predetermined angle.

Such a device can be used not only for the primary inspection but also for the final inspection after polishing, in which case only the film member 43 and the light source 16 can be used as shown in FIG. 4 without using the solution bath 12. Will be. This is because fine stipples (unevenness) generated on the surface of the panel 10 are polished by the polishing tool, and in this case, even if only the film member 43 is used, the code defect can be discriminated.

As described above, according to the present invention, it is possible to determine a code defect that can be formed in the panel 10 at the front and rear stages of the polishing process. Accordingly, it is possible to quickly identify and correct the cause of the code defect by the feedback.

As described above, according to the present invention, there is provided a code inspection apparatus for a cathode ray tube panel capable of discriminating a code defect of a panel.

Claims (7)

In the code inspection apparatus of the cathode ray tube panel for inspecting the code defect formed in the cathode ray tube panel, A solution tank having an upwardly open cylindrical shape and at least one region of both sidewall faces spaced apart from each other at a predetermined interval to be a transparent member; A refractive solution accommodated in said solution tank to impregnate a panel to be inspected with a predetermined refractive index; A light source for irradiating predetermined light toward the transparent member from one side of the solution tank; And a film member disposed between the light source and the transparent member, the film member having a light transmissive band and a light blocking band having a fine width disposed alternately with each other. The method of claim 1, And a refractive index of the refractive solution is substantially the same as the refractive index of the panel to be inspected. The method of claim 1, And a guide means installed in the solution tank to guide and hold the panel accommodated in the solution tank in an upright state. The method according to any one of claims 1 to 3, The refractive solution is benzyl alcohol (Benzyl Alcohol) characterized in that the code inspection device of the panel for cathode ray tubes. The method of claim 1, And a width of the light transmission band of the film member is 30% of the width of the light blocking band. The method of claim 1, Code inspection apparatus for a cathode ray tube panel, characterized in that the width of the light blocking band of the film member is at least 90㎛ 120㎛. In the code inspection method of the cathode ray tube panel for inspecting a code defect formed in the cathode ray tube panel, Impregnating a panel to be inspected into a refractive solution having a predetermined refractive index; Arranging a film member having a light blocking band and a light transmitting band having a predetermined width alternately formed on one side of the panel; Irradiating light to sequentially pass through the film member and the panel; Code inspection method of the cathode ray tube panel comprising the step of inspecting the cord formed on the panel.