JPH05242802A - Method for manufacturing cathode ray tube - Google Patents

Abstract

(57) [Abstract] [Purpose] Improves the cleanliness of the joint surface with the funnel glass after applying phosphor slurry etc. to the face glass, and vacuums or seals from the stopper mechanism of the cleaning liquid pouring device. (EN) A method of manufacturing a cathode ray tube capable of preventing reverse contamination that occurs on a surface and insufficient removal of excess slurry. [Structure] A phosphor slurry or the like adhering to the joint surface of the face glass 6 of the cathode ray tube with the funnel glass is removed by rotating the friction roller 1 on the joint surface and wiping the joint surface. [Effect] Excessive slurry removal and reverse contamination from the contact stop mechanism of the excess slurry removal device to the seal surface can be greatly reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes phosphor slurry, filming agent, and other contaminants on the sealing surface adhering to the joint surface with the funnel glass in the process of coating phosphor slurry on the face glass of a cathode ray tube. The present invention relates to a method for manufacturing a cathode ray tube in which the surface of the cathode ray tube is removed by rubbing the surface thereof with one or more friction rollers.

[0002]

2. Description of the Related Art In the manufacture of a cathode ray tube, in the past, in a step of coating a phosphor slurry (hereinafter simply referred to as a slurry), the surface of the cathode ray tube that joins the funnel glass (hereinafter abbreviated as a sealing surface) In order to remove the excess slurry etc. adhering to (1)), generally, a cleaning solution such as pure water is applied (rim wash or trimming, hereinafter referred to as trimming), or low pressure or vacuum suction is performed (hereinafter referred to as vacuum wipe). , Or a combination of these methods.

In the case of trimming, the edge of the face glass (hereinafter referred to as a skirt portion) coated with a fluorescent substance,
Pure water or the like at an appropriate temperature was poured onto the skirt portion and the sealing surface to remove the excess slurry that had adhered. Further, in the case of vacuum wipe, a vacuum suction device is applied to the skirt to suck excess slurry or the like, and if necessary, the rest of the applied cleaning liquid by the above method.

8 to 11 show a skirt portion S of the face glass in which the excess slurry adhering to the sealing surface has been removed by the above-mentioned conventional method. FIG. 8 shows the outside of the corner portion of the skirt portion S. 9 shows the outside of the straight line portion, FIG. 10 shows the inside of the corner portion, and FIG. 11 shows the inside of the straight line portion.

[0005]

However, even with any of the above-mentioned methods, depending on the adhered state of slurry or the like, particularly on the sealing surface, sufficient removal is not performed, and
There is also a problem that excessive slurry or the like adheres to the contact stop mechanism that determines the position of the nozzle for pouring the cleaning liquid or the suction port of the vacuum suction device, and the sealing surface is contaminated.

As a matter of course, the washing liquid is a suitable acid or basic substance,
Alternatively, use a surfactant or the like, or replace the contact part with the sealing surface of the contact stop mechanism that increases the suction force, or wash it, or even remove the contact stop mechanism itself to position the nozzle, etc. Measures such as numerical control may be considered, but they cause problems such as handling of chemicals and new contamination, limit of capacity as a device, cost and trouble of maintenance and operation of the device.
Neither is the preferred method.

The present invention has been made to solve the above problems, and it is possible to keep the seal surface and the contact stop mechanism clean and prevent reverse contamination from the contact stop mechanism to the seal surface. It is intended to provide a manufacturing method of.

[0008]

In the method of manufacturing a cathode ray tube according to the present invention, the cathode ray tube is removed by using one or a plurality of friction rollers that rub the sealing surface.

[0009]

In the present invention, the seal surface is rubbed by one or more friction rollers to remove excess slurry and the like adhering to the seal surface, and the seal surface and the like are not scratched by an object separated from the seal surface. In this way, the residual deposits on the seal surface are reduced, and the reverse contamination on the seal surface caused by the contamination of the stopper mechanism is significantly reduced.

[0010]

FIG. 1 is a conceptual view of a seal surface wiping mechanism applied to one embodiment, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIGS. It is a combination with a vacuum wipe mechanism. 1 to 3
In the figure, 1 is a friction roller, 2 is a roller of a stopper mechanism, 3 is a nozzle for supplying a cleaning liquid, and 4 is a support structure thereof. This support structure 4 is shown in FIG.
A friction roller 1 and a roller 2 of an abutting stop mechanism are rotatably supported between the upper surface and the lower surface of the support structure 4 in the shape of a letter.

Further, the roller 2 of the contact stopping mechanism is a roller of the contact stopping mechanism of the other excess slurry removing device, and the rotation of the roller 2 of the contact stopping mechanism causes friction between the friction roller 1 and the roller 2 of the contact stopping mechanism. Then, the friction roller 1 is adapted to rotate. The friction roller 1 is formed of a material such as resin that is soft and does not easily wear, and the seal surface is not scratched by itself or by an object separated from the surface of the friction roller 1.

Further, in the central portion of the upper surface of the support structure 4,
As is clear from FIG. 1, a rectangular hole 4a is formed, and the nozzle 3 is inserted through the hole 4a. Excessive slurry removed from the seal surface is sucked by the suction nozzle 5 by the cleaning liquid supplied from the nozzle 3 and the friction roller 1. The suction nozzle 5 is arranged near the outer peripheral surface of the roller 2 of the contact stop mechanism. Reference numeral 6 is a face glass to be cleaned.

Next, a method of removing the surplus slurry will be described. The face glass 6 rotates at an appropriate speed when the seal surface is cleaned. The friction roller 1 pressed against the face glass 6 has a coefficient of kinetic friction with the glass smaller than that of the roller 2 of the contact stop mechanism, thereby obtaining power by friction with the roller 2 of the contact stop mechanism to obtain the face glass. While contacting the sealing surface of 6, the face glass 6 rotates in the opposite direction. As a result, excess slurry and the like attached to the sealing surface is removed.

At this time, the position of each roller, that is, the friction roller 1 and the roller 2 of the abutting mechanism is generally determined, and therefore, the position where the seal surface contacts the friction roller 1 is the rotation of the face glass 6. Move up and down according to. This further enhances the effect of removing excess slurry and the like. Further, an appropriate cleaning liquid, for example, pure water, is poured onto the friction roller 1 to help remove excess slurry, and the friction roller 1 is prevented from being contaminated by excess slurry.

4 to 7 show a state in which the excess slurry adhering to the face glass is removed by the present invention. FIG. 4 is a perspective view showing the outside of the corner portion of the skirt portion S of the face glass 6. 5 indicates the outside of the straight line portion, and FIG.
Shows the inside of the corner of the skirt S, and FIG. 7 shows the outside of the straight portion, and the degree of cleaning of the sealing surface is improved as compared with the case of FIGS.

In this embodiment, by utilizing the fact that a roller is used as the contact stopping mechanism of the other excess slurry removing device,
Driving is performed by bringing the roller for friction on the seal surface into contact with the roller of the stopper mechanism. As a result, the structure of the entire mechanism according to the present invention is simplified, and the contact stop mechanism is also rubbed to some extent to prevent contamination of the mechanism. However, of course, this driving force can be obtained by using an appropriate electric motor or the like. Good.

Further, in the above embodiment, the case where the number of the friction roller 1 for the friction of the seal surface is one is exemplified, but of course, it is possible to improve the ability to remove the excess slurry by providing a plurality of friction rollers.

[0018]

Since the present invention is configured as described above, it has the following effects.

Compared with the case where only the conventional method is used,
Adhesion such as residual slurry on the seal surface and adherence due to reverse contamination from the contact stop mechanism to the seal surface is greatly reduced.When combined with other methods, the contact part of the contact stop mechanism with the seal surface The frequency of replacement or cleaning of this contact part is reduced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a seal surface wiping mechanism applied to a method of manufacturing a cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a side view of the above seal surface wiping mechanism.

FIG. 3 is a front view of the above seal surface wiping mechanism.

FIG. 4 is a perspective view showing a portion inside a corner portion of a skirt portion of a face glass in which an excess slurry attached to a sealing surface is removed according to the above embodiment.

FIG. 5 is a perspective view showing a portion inside a straight portion of a skirt portion of the face glass.

FIG. 6 is a perspective view showing a portion outside the corner portion of the skirt portion of the face glass.

FIG. 7 is a perspective view showing a portion outside the linear portion of the skirt portion of the same face glass.

FIG. 8 is a perspective view showing a portion outside a corner portion of a skirt portion of a face glass in which excess slurry attached to a sealing surface is removed by a conventional wiping method.

FIG. 9 is a perspective view showing a portion outside a straight line portion where excess slurry attached to a sealing surface has been removed by a conventional wiping method.

FIG. 10 is a perspective view showing a portion inside a corner portion of a skirt portion of a face glass in which excess slurry attached to a sealing surface is removed by a conventional wiping method.

FIG. 11 is a perspective view showing an inner portion of the straight portion of the skirt portion of the face glass in which the excess slurry attached to the sealing surface has been removed by the conventional wiping method.

[Explanation of symbols]

 1 Friction Roller 2 Roller for Stopping Mechanism 3 Cleaning Liquid Supply Nozzle 4 Support Structure 5 Suction Nozzle 6 Face Glass S Skirt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Koizumi No. 1 Baba Institute, Nagaokakyo, Kyoto Prefecture Mitsubishi Electric Corporation Kyoto Works (72) Inventor Masumi Kato No. 1 Baba Institute, Nagaokakyo Kyoto Prefecture Mitsubishi Electric Corporation Kyoto Works

Claims (1)

[Claims] 1. A phosphor slurry, a filming agent, and other contaminants on the seal surface adhered to the surface to be joined with the funnel glass are rubbed against the seal surface in the step of applying the phosphor slurry to the face glass of the cathode ray tube. A method of manufacturing a cathode ray tube, which comprises removing with one or more friction rollers.