JPH08162017A - Method for manufacturing color selection electrode for color picture tube - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the four sides of a mask plate are sandwiched by clips and pulled, it is possible to apply a uniform tension to the mask plate. [Structure] A rectangular area 15 surrounded by two long sides and two short sides
A mask plate 14 in which a large number of apertures 16 are arranged
Is welded to the four sides of the rectangular frame 22 and stretched, the mask is held by sandwiching the outer regions 17a and 17b of the two short sides without sandwiching the outer regions 17c and 17d of the two long sides. The step of pulling the plate in two directions parallel to the long side, and the mask plate parallel to the short side by sandwiching the outer regions 17c and 17d of the two long sides without sandwiching the outer regions 17a and 17b of the two short sides. And the step of pulling the mask plate 14 simultaneously in the four directions while sandwiching the outer regions 17a to 17d on the four sides, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a color selection electrode of a color picture tube used for a TV receiver, a display of a computer terminal or the like.

[0002]

2. Description of the Related Art Generally, the color selection electrode of a color picture tube is
As shown in FIG. 3, it is composed of a rectangular metal mask plate 1 and a rectangular frame-shaped metal frame 2 which stretches the mask plate 1. The mask plate 1 has a large number of apertures 3, 3 ... For passing electron beams. And the supporting ends 1a to 1d of the four sides of the mask plate 1 are welded to the top surfaces of the pair of long sides 4 and 5 of the frame 2 and the pair of short sides 6 and 7 of the frame 2 which face each other. It has been configured.

The welding is performed, for example, as shown in FIG. That is, a pair of clips 9 and 10 for sandwiching the outer regions 1c and 1d on the two short sides of the perforated rectangular region 8 of the mask plate 1 and a pair of clips for sandwiching the outer regions 1e and 1f on the long side. The mask plate 1 is welded to the four sides of the frame 2 while simultaneously pulling the mask plate 1 in two directions parallel to the short side and in two directions parallel to the long side by using 11, 12.

[0004]

With this structure, the mask plate 1 can be stably stretched over the four sides of the frame 2, but the outer regions 1c, 1c of the two short sides of the mask plate 1 can be stably stretched.
d and the outer regions 1e and 1f of the two long sides are sandwiched by the two pairs of clips 9 to 12, so that the pair of clips 9 and 10 pulls the mask plate 1 in two directions parallel to the long sides. Is disturbed by being sandwiched by the remaining clips 11 and 12. Further, the distribution of the force of pulling the mask plate 1 in the two directions parallel to the short sides by the pair of clips 11 and 12 is disturbed by the nipping by the remaining clips 9 and 10. That is, it becomes difficult to apply a uniform tension to the mask plate 1.

Therefore, it is an object of the present invention to provide a mask plate with four
It is an object of the present invention to provide a method for manufacturing a color selection electrode that can apply a uniform tension to the mask plate even if the sides are held by clips and pulled.

[0006]

According to the present invention, in order to achieve the above object, a mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is provided. When welding and stretching on four sides of a rectangular frame, the mask plate is held on the long sides by sandwiching the outer regions of the two short sides without sandwiching the outer regions of the two long sides. And pulling the mask plate in two directions parallel to the short sides by sandwiching each outer region of the two long sides without sandwiching each outer region of the two short sides. And are sequentially set, and then the outer regions of the two long sides and the outer regions of the two short sides are respectively sandwiched so that the mask plate is parallel to two directions parallel to the short sides and the long sides. Set the process of applying the welding while simultaneously pulling in two directions. Method for manufacturing a color picture tube for color selection electrode is provided which is characterized and.

In addition, when a mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is welded to four sides of a rectangular frame, and is stretched,
Sandwiching the outer regions of the two short sides without sandwiching the outer regions of the two long sides, and pulling the mask plate in two directions parallel to the long sides; and placing the mask plate on the long sides. Sandwiching each outer region of the two long sides while pulling in two parallel directions, and sandwiching each outer region of the two long sides without sandwiching each outer region of the two short sides, the mask plate And a step of sandwiching each outer region of the two short sides while pulling the mask plate in two directions parallel to the short side, are sequentially set,
Then, a method of manufacturing a color selection electrode for a color picture tube is provided, in which the step of applying the welding is set while the mask plate is stretched in two directions parallel to the long side.

When a mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is welded and stretched on four sides of a rectangular frame,
Sandwiching each outer region of the two long sides without sandwiching each outer region of the two short sides, and pulling the mask plate in two directions parallel to the short sides; and each outer region of the two long sides. Sandwiching each outer region of the two short sides without sandwiching and pulling the mask plate in two directions parallel to the long sides, which are sequentially set, and thereafter, each outer region of the two short sides. And a step of performing the welding while simultaneously sandwiching the outer regions of the two long sides and simultaneously pulling the mask plate in two directions parallel to the long sides and two directions parallel to the short sides. Provided is a method for manufacturing a color selection electrode for a color picture tube.

When a mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is welded and stretched on four sides of a rectangular frame,
Sandwiching the outer regions of the two long sides without sandwiching the outer regions of the two short sides, and pulling the mask plate in two directions parallel to the short sides; and placing the mask plate on the short sides. Sandwiching each outer region of the two short sides while pulling in two parallel directions, and sandwiching each outer region of the two short sides without sandwiching each outer region of the two long sides, the mask plate And a step of sandwiching each outer region of the two long sides while pulling the mask plate in two directions parallel to the long sides, are sequentially set,
Thereafter, a method for manufacturing a color selection electrode for a color picture tube is provided, wherein the step of applying the welding is set while the mask plate is stretched in two directions parallel to the short side.

At a position surrounding the rectangular area of the mask plate,
It is possible to previously provide cut lines that are arranged intermittently at a uniform pitch.

[0011]

According to the present invention, the step of pulling the mask plate in two directions parallel to the long side by sandwiching the outer areas of the two short sides without sandwiching the outer areas of the two long sides, and the two short sides The step of pulling the mask plate in two directions parallel to the short side by sandwiching each outer region of the two long sides without sandwiching each outer region, the mask plate that has undergone these two processes has a gripping margin of a clip. The plate surface is uniformly stretched without being affected by. Then, since the mask plate in such a state that the plate surface is uniformly stretched is welded to the frame, the mask plate is stretched around the four sides of the frame with a uniform force distribution without disturbance.

[0012]

Embodiments of the present invention will now be described with reference to the drawings.

The mask plate 14 shown in FIG. 1 is made of a thin metal plate such as iron or Invar, and has a large number of apertures 16, 16 ... In a rectangular region 15 at the center. Figure 1 (a)
As shown in, each outer region 1 of the two short sides of the rectangular region 15
7a and 17b are sandwiched by a pair of clips 18 and 19, respectively. When the pair of clips 18 and 19 move by a predetermined amount in the two directions indicated by arrows a and b by a power mechanism (not shown), the mask plate 14 is strongly pulled in two directions parallel to the long sides of the rectangular region 15.

Then, as shown in FIG. 1B, the outer regions 17c and 17d on the two long sides of the rectangular region 15 are set to 1
It is clamped by a pair of clips 20 and 21, respectively.
When the pair of clips 20, 21 are moved by a predetermined amount in two directions indicated by arrows c, d by a power mechanism (not shown), the mask plate 14 is strongly pulled in two directions parallel to the short sides of the rectangular area 15. At this stage, a pair of clips 18, 19
Does not exist, or maintains the state in which the mask plate 14 is not pinched even if it exists.

Then, as shown in FIG. 1 (c), the two short side outer regions 17a, 17b and the two long side outer regions 17c, 17d of the rectangular region 15 are divided into two pairs of clips 18 to 21. Sandwiched by each. At this stage, the pair of clips 18, 19 are in the two directions shown by the arrows a, b, and the pair of clips 20, 21 are the arrows c, d.
Move in a predetermined direction in two directions indicated by. Therefore, the mask plate 14 is simultaneously pulled in two directions parallel to the short sides and two directions parallel to the long sides of the rectangular region 15. Then, under this state, the rectangular area 15 of the mask plate 14 is
2 long sides and 2 short sides of which are rectangular frame-shaped metal frames 2
It is welded to 4 sides of 2.

This welding is performed by welding or brazing, but when all welding is completed, two pairs of clips 18 are used.
The pinching by ~ 21 is released. Then, the rectangular area 15
The outer regions 17a to 17d surrounding the are cut off to complete the color selection electrode.

As shown in FIG. 2, a cut line 23 can be provided in advance at a position surrounding the rectangular area 15 of the mask plate 14. The score lines 23 are so-called perforations arranged intermittently at a uniform pitch,
When the mask plate 14 is pulled as described above, the rectangular region 15 is provided with a uniform cushioning effect, and the outer regions 17a to 17d are easily cut after welding.

The tensile force applied to the mask plate by the two pairs of clips varies depending on the material, size and plate thickness of the mask plate or frame, but the practical numerical range is 6 kg.
f / mm ^{2 to 20} Kgf / mm ² .

After the pulling step shown in FIG. 1 (a) is completed, the time until the pulling step shown in FIG. 1 (b) is started, and after the pulling step shown in FIG. 1 (b) is finished,
The time required to enter the pulling step shown in FIG.
In both cases, it is desirable to be as short as possible. The allowable time width depends on the material and size of the color selection electrode to be manufactured, but is limited to about 30 seconds. Further, the setting order of the pulling step shown in FIG. 1A and the pulling step shown in FIG. 1B can be reversed, or these two steps can be set twice or more. .

Further, following the step of pulling the mask plate in two directions parallel to the long side (while continuing the pulling operation), a step of sandwiching each outer region of the two long sides with a pair of chucks may be provided. Following the process of pulling the mask plate in two directions parallel to the short side (while continuing the pulling operation),
A step of sandwiching each outer region of the two short sides with a pair of chucks can be provided. The vertical and horizontal dimensions of the color selection electrode are not limited to those having a ratio of 3: 4, and needless to say, those having a ratio of 9:16 are applicable.

[0021]

As described above, according to the present invention, since the mask plate can be stably stretched on the frame having a rectangular frame shape while maintaining high flatness, a color picture tube having excellent color reproducibility can be obtained. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a manufacturing process of a color selection electrode according to an embodiment of the present invention.

FIG. 2 is a plan view of a mask plate according to another embodiment of the present invention.

FIG. 3 is an exploded perspective view of a conventional color selection electrode.

FIG. 4 is a perspective view of an assembly process of a conventional color selection electrode.

[Explanation of symbols]

 14 Mask Plate 15 Rectangular Area 16 Aperture 17a to 17d Outside Area 18 to 21 Clip 22 Frame 23 Cut Line

Front Page Continuation (72) Inventor Masaru Nagaike 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takahata Ichiyanagi 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Hideaki Maki 1-1, Saiwaicho, Takatsuki City, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd.

Claims (5)

[Claims] 1. A mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is welded and stretched on four sides of a rectangular frame, Sandwiching each outer region of the two short sides without sandwiching each outer region of the two long sides, and pulling the mask plate in two directions parallel to the long sides; and each outer region of the two short sides. Sandwiching each of the outer regions of the two long sides without sandwiching, and sequentially setting the step of pulling the mask plate in two directions parallel to the short sides, and thereafter, each of the outer regions of the two long sides. And a step of performing the welding while simultaneously sandwiching the outer regions of the two short sides and simultaneously pulling the mask plate in two directions parallel to the short sides and two directions parallel to the long sides. A method of manufacturing a color selection electrode for a characteristic color picture tube. 2. A mask plate, in which a large number of apertures are arranged in a rectangular area surrounded by two long sides and two short sides, is welded to four sides of a quadrangular frame to be stretched. Sandwiching each outer region of the two short sides without sandwiching each outer region of the two long sides, and pulling the mask plate in two directions parallel to the long sides; Sandwiching each outer region of the two long sides while pulling in two parallel directions, and sandwiching each outer region of the two long sides without sandwiching each outer region of the two short sides, the mask plate The steps of pulling in two directions parallel to the short sides and sandwiching the outer regions of the two short sides while pulling the mask plate in two directions parallel to the short sides are sequentially set. Then, while the mask plate is stretched in two directions parallel to the long side, the welding is performed. Method for manufacturing a color picture tube for color selection electrode, characterized in that to set the step of applying. 3. A mask plate, in which a large number of apertures are arranged in a rectangular area surrounded by two long sides and two short sides, is welded and stretched on four sides of a rectangular frame, Sandwiching each outer region of the two long sides without sandwiching each outer region of the two short sides, and pulling the mask plate in two directions parallel to the short sides; and each outer region of the two long sides. And sandwiching each outer region of the two short sides without sandwiching, and sequentially pulling the mask plate in two directions parallel to the long sides, and thereafter, each outer region of the two short sides. And a step of performing the welding while simultaneously sandwiching the outer regions of the two long sides and simultaneously pulling the mask plate in two directions parallel to the long sides and two directions parallel to the short sides. A method of manufacturing a color selection electrode for a characteristic color picture tube. 4. A mask plate having a large number of apertures arranged in a rectangular area surrounded by two long sides and two short sides is welded and stretched on four sides of a rectangular frame, Sandwiching the outer regions of the two long sides without sandwiching the outer regions of the two short sides, and pulling the mask plate in two directions parallel to the short sides; and placing the mask plate on the short sides. Sandwiching each outer region of the two short sides while pulling in two parallel directions; and sandwiching each outer region of the two short sides without sandwiching each outer region of the two long sides, the mask plate Sequentially setting the step of pulling in the two directions parallel to the long side, and the step of sandwiching each outer region of the two long sides while pulling the mask plate in the two directions parallel to the long side. After that, while the mask plate is stretched in two directions parallel to the short side, the welding is performed. Method for manufacturing a color picture tube for color selection electrode, characterized in that to set the step of applying. 5. A color selection electrode for a color picture tube according to claim 1, 2, 3 or 4, wherein cut lines which are intermittently arranged at a uniform pitch are provided in advance in a position surrounding a rectangular area of the mask plate. Production method.