JPH0963476A - Manufacture of cathode-ray tube color sorting electrode device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CRT which has less formation of wrinkles on an electrode assembly and has highly fine image by cooling down the whole frame in such a state as unifying its temperature distribution before welding the color sorting electrode assembly to a frame. SOLUTION: Members to be welded, 5A, 5B, 5L, 5R, 4L, 4R are welded in prescribed positions of A and B members 2A, 2B, 2L, 2R of a frame 1. Formation rates of wrinkles formed on the surface of an electrode assembly 6 are differed by ambient temperature, when a color sorting electrode assembly 6 is welded to the welded frame 1 along a welding part 9. The experiment results show that, while the ambient temperature is from -20 deg.C to +20 deg.C, the formation rate of wrinkle is 0. It is clarified that there is no problem to set the surface temperature of the electrode assembly to +15 deg.C-+20 deg.C to quicken the unit work time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for manufacturing a cathode ray tube color selection electrode device, and more particularly to a method for manufacturing a cathode ray tube color selection electrode device in which wrinkles are not generated on an electrode element body of an aperture grill. .

[0002]

2. Description of the Related Art A color cathode ray tube (hereinafter referred to as CRT) having a striped phosphor screen and a color selection electrode element has been well known. The color selection electrode body used for such a color CRT is formed by vertically etching slits on a thin steel plate by a chemical etching method, and fixing the slits to a frame made of a steel frame by welding with a predetermined tension. It is a thing.

The manufacturing process of such a color CRT frame and color selection electrode body is shown in FIGS. As shown in FIG. 3 (A), the frame 1 includes upper and lower members (hereinafter referred to as A members) 2A and 2B and left and right members (hereinafter referred to as B members) 3L and 3R such as steel members having an L-shaped cross section.
Is configured.

Further, a self-temperature compensating element 4L and 4R such as a bimetal is fixed to the back side of the B members 3L and 3R by welding or the like, and a spring holder for holding a leaf spring to be fitted to a pin formed on the inner surface of the panel of the CRT. 5A and 5B are fixed to the A members 2A and 2B, and spring holders 5L and 5R are fixed to the B members 3L and 3R by welding or the like on the side surfaces of the respective members as shown by the arrows.

Next, as shown in FIG. 3B, the step of welding the color selection electrode body 6 to the frame 1 is carried out. The color selection electrode body 6 is formed by photochemical etching of a rectangular thin mild steel plate. A vertical slit 7 is formed by a method as shown in FIG. 3B, and an electrode element body 8 is formed between the slits 7 and 7.

When the color selection electrode element body 6 is welded to the frame 1 as described above, the surfaces of the A members 2A and 2B are finished and the welding is performed at the welded portion 9 of the color selection electrode element body 6. 3B in which tension is applied to the electrode body 6 in the direction indicated by arrow G in FIG. 3B, and compression force is applied to the frame 1 in the direction indicated by arrow F as shown in FIG. 3B. Welding is performed using the welding jigs 10A and 10B as shown in FIG.

The color selection electrode body 6 is welded to the frame 1 to form the color selection electrode shown in FIG. 4 (B), and a leaf to be fitted to a pin provided on the inner surface of the face panel in a later step. The springs are spring holders 5L, 5R,
It is welded to 5A and 5B.

[0008]

As described in detail in the above-mentioned conventional structure, in the process of obtaining the color selection electrode device, the self-temperature correction elements 4L and 4R and the spring holder 5 are attached to the frame 1.
In the process of welding L, 5R, 5A, 5B with a welding machine, the heat applied to the frame 1 is non-uniformly distributed, and the temperature of the portion where the above-mentioned respective parts are welded rises.

The frame 1 having a non-uniform temperature distribution accumulated in the frame 1 is flown to the next step, and brought to the step of welding the color selection electrode body 6 onto the A members 2A and 2B of the frame 1. When the color selection electrode element body 6 is welded, the portion of the color selection electrode element body 6 in contact with the welded portion 9 and the electrode element body 8 in contact with the welded portion 9 are non-uniform due to partial heat storage of the frame 1. After the color selection electrode body 6 has been welded, the left and right side end portions of the color selection electrode body 6 and the spring holder are shown in the front view of FIG. 5 (A) and the side view of FIG. 5 (B). Wrinkles 11 are generated on the electrode element body 8 of the color selection electrode element body 6 in the vicinity where 5A and 5B are welded. For this reason, the surface of the color selection electrode element body 6 has an uneven curvature. Therefore, in the process of forming a phosphor screen on the inner surface of the face panel using the color selection electrode element body 6 as a mask, stripe-shaped R, G The line widths of the B phosphor and the carbon stripe are disturbed at the wrinkle generation portion, and there is a problem that the image quality is deteriorated.

When the color selection electrode element body 6 is welded to the frame 1, a compressive force as indicated by an arrow F is applied to the frame 1 to longitudinally move the electrode element body 8 of the color selection electrode element body 6 after welding. Tension is applied to the cable, but in order to damp the vibration that cannot be absorbed even by applying such tension, as shown in FIG.
As shown in the front view of FIG. 6A and the side view of FIG. 6B, the damper wires 12 and 12 made of extremely thin wires are stretched in a direction orthogonal to the longitudinal direction of the electrode body 8 to form the electrode body 8. Of the color selection electrode body 6, the damper wire 12 must be in contact with the surface of the electrode body 8 of the color selection electrode body 6, but may be in contact with the wrinkle 11 at the generation portion. There is a problem that vibration cannot be absorbed at the time of resonance because it cannot be done.

The present invention is intended to provide a method of manufacturing a cathode ray tube color selection electrode device which eliminates the above problems.
The problem is to obtain a method for manufacturing a cathode ray tube color selection electrode device in which wrinkles do not occur in the electrode body of the color selection electrode body.

[0012]

A method of manufacturing a cathode ray tube color selection electrode device according to the present invention is a method of manufacturing a cathode ray tube color selection electrode device having a color selection electrode in which a color selection electrode element is mounted on a frame. Further, before the color selection electrode body is fixed to the frame, it is cooled so that the temperature distribution of the entire frame becomes uniform.

According to this structure, the tact time until the welding process of the color selection electrode body after the welding process of the spring holder and the self-temperature correction element on the frame 1 can be significantly reduced, and the color selection electrode body is also reduced. It is possible to obtain a color selection electrode in which wrinkles do not occur during welding to the frame.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A method for manufacturing a CRT color selection electrode device according to the present invention will be described below with reference to FIGS. 1 (A) and 1 (B) are configuration diagrams of a frame and a cooling device which are cooled in one step of the manufacturing process of the CRT color selection electrode device of the present invention, and FIG. 2 is a process showing the manufacturing process of the frame of this example. It shows a figure.

The manufacturing process of this example will be described with reference to FIGS. First, the A members 2A and 2B and the B members 3L and 3R described in FIG.
The frame 1 having a substantially rectangular frame is subjected to a welding step 15 in which the spring holders 5A, 5B, 5L, 5R and the self-temperature correction elements (bimetals) 4L and 4R are welded to the frame 1.

Next, the frame 1 has a spring holder 5L,
5R, 5A, 5B and self-temperature correction elements 4L and 4R
The welded part of is heated at the time of welding, and the temperature distribution is non-uniform when viewed as the whole frame 1, and the welded frame 1 having a temperature gradient is placed on the conveyor and the next step shown in FIG.
The welding of the color selection electrode body 6 and the trimming step 17 of the color selection electrode body 6 described in (B) are performed.

On the welded frame 1, a color selection electrode body 6 is formed.
Of the welding and color-selecting electrode element 6 to the trimming step 17, or immediately after the welding step 15 of the welded frame 1 is completed, a cooling step 16 with air, compressed air, cooling air, water, or other refrigerant is interposed. .

In FIG. 1A, the spring holder 5
The welded frame 1 to which the members to be welded such as L, 5R, 5A, and 5B are welded is cooled by the refrigerant 13 at a predetermined position where the cooling step 16 is performed, so that the temperature distribution of the frame 1 is made uniform. For example, it is cooled by cooling air.

FIG. 1B shows an embodiment of such a cooling device. A blower or spin dryer motor 24 is provided in a cooling casing main body 23 arranged near the conveyor.
Etc. are built in, and the opening 26 of the duct 25 is arranged to face the frame 1. The upper example of the casing body 23 has an intake port for the cooling air 27, and the cooling air 21 that has passed through the filter 22 is blower or spin dryer motor 24.
The wind 28 around the rotor generated along the spiral globe 27 by the high speed rotation of the rotor cools the welded frame 1 as the refrigerant 13 from the opening 26 via the duct 25.

The welded frame 1 in which the members to be welded which have been cooled in this way are welded is the color selection electrode body 6 as shown in FIG.
After the welding and trimming process 17 to the frame 1 and the blackening treatment process 18 are performed, rust prevention and light reflection prevention measures are taken, and then the springs are attached to the spring holders 5L, 5R, 5
The step 19 of welding to A and 5B is performed, and the finished product completed as the color selection electrode is transferred to the step 20 of assembling into the next panel.

According to the structure of this example as described above, the ambient temperature after welding the member to be welded to the frame 1 is room temperature 0 ° C. to 50 ° C.
Below, the welded portion 9 of the color selection electrode body 6 is attached to the frame 1.
The average surface temperature of the electrode body 8 when welding along
The maximum and minimum values T of the surface temperature of the welded frame 1 when the temperature is ₀ (° C.) are: T ₀ −20 ° C. ≦ T ≦ T ₀ + 20 ° C. A method for manufacturing a CRT color selection electrode device was obtained in which wrinkles 11 did not occur in 8 and the takt time from step 15 to step 17 could be shortened. Hereinafter, this embodiment will be described in detail.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, as an embodiment of this embodiment, the members to be welded 5A, 5B, 5L, 5R, 4L, 4R as shown in FIG. 1 are at predetermined positions of the A and B members 2A, 2B, 2L, 2R of the frame 1. Welded to the welded frame 1 when the color selection electrode body 6 is welded along the welded portion 9 (see FIG. 3C) at room temperature of 20 ° C. to 25 ° C. Table 1 shows the relationship between the maximum surface temperature T (° C.) of the finished frame 1 and the occurrence rate of wrinkles on the surface of the electrode body 8 of the color selection electrode body 6.

[0023]

[Table 1]

From this result, the color selection electrode body 6 was welded to the welded frame.
The maximum surface temperature of the welded frame 1 before welding on the frame 1
To T₀-20 ° C ≦ T ≦ T₀Wrinkles may occur at + 20 ℃
It can be seen that the livelihood is greatly reduced. Also, shorten the tact time
To T₀+ 20 ° C ~ T ₀+ 15 ℃ and frame surface
It turns out that there is no problem even if the temperature is changed in a high state. This example
Then, the temperature minimum value T₀Near -20
Is a negative factor, but this range
Shows the limit that can reduce wrinkle occurrence rate to almost zero
doing.

[0025]

According to the method of manufacturing the cathode ray tube color selection electrode device of the present invention, the electrode element body is cooled by making the temperature distribution of the entire frame uniform before welding the color selection electrode element body to the frame. It is possible to obtain a wrinkle that can be reduced. As a result, a CRT with a high-definition screen can be obtained, the non-contact surface between the electrode body and the damper wire can be eliminated, and the vibration resistance of the electrode body can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a frame (FIG. 1A) and a cooling device (FIG. 1B) showing a method for manufacturing a cathode ray tube color selection electrode device of the present invention.

FIG. 2 is a process drawing of the manufacturing method of the cathode ray tube color selection electrode device of the present invention.

FIG. 3 is a manufacturing process explanatory diagram (I) of a conventional method for manufacturing a cathode ray tube color selection electrode device.

FIG. 4 is a manufacturing process explanatory view (II) of a conventional method for manufacturing a cathode ray tube color selection electrode device.

5A and 5B are a front view (FIG. 4A) and a side view (FIG. 4B) for explaining a wrinkle occurrence cause of a conventional color selection electrode.

6A and 6B are a front view (FIG. 5A) and a side view (FIG. 5B) for explaining a damper of a conventional color selection electrode.

[Explanation of symbols]

 1 Frame 2A, 2B Upper / lower member (A member) 3L, 3R Left / right member (B member) 4L, 4R Self-temperature correction element 5L, 5R, 5A, 5B Spring holder 13 Refrigerant 24 Blower

Claims (2)

[Claims] 1. A method of manufacturing a cathode ray tube color selection electrode device having a color selection electrode in which a color selection electrode element is mounted on a frame, wherein the color selection electrode element is fixed to the frame. A method of manufacturing a cathode ray tube color selection electrode device, characterized in that the frame is cooled so that the temperature distribution of the entire frame is made uniform. 2. The method of manufacturing a cathode ray tube color selection electrode device according to claim 1, wherein the temperature at the time of cooling is within ± 25 ° with respect to the ambient temperature T ₀ in which the frame is arranged.