JP2002313237A - Separation method of plasma display panel, and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recycle as a glass material, the front substrate and the back substrate that are obtained by separating the plasma display panel, which is produced as defective parts during processes or collected, after being used as products, without scrapping them as a waste matter. SOLUTION: A cutter 4 is inserted into the sealing material 3 between the front substrate 1 and the back substrate 2, and while vibration is given to the cutter 4 by the vibration driving device 5, the cutter 4 is moved forward by the feed driving device 6, by cutting along the applied region of the sealing material 3, so that the front substrate 1 and the back substrate 2 are separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for separating a sealed front substrate and a rear substrate of a plasma display panel.

[0002]

2. Description of the Related Art In recent years, as display devices have become larger and thinner, plasma display panel devices have been developed. Plasma display panel devices
A front substrate on which a pixel electrode is formed on a glass substrate and a rear substrate on which a pixel electrode is formed on a glass substrate and a phosphor is applied are sealed with a sealing material, and between the sealed front substrate and the back substrate. It incorporates a plasma display in which a discharge gas is sealed.
No. 03072, JP-A-4-366526, and JP-A-55-70873.

[0003] Generally, defective products generated in the manufacturing process of the plasma display having the above-mentioned structure and electric appliances used as products have been disposed of by landfilling or the like.

[0004]

DISCLOSURE OF THE INVENTION However, the disposal of electric appliances by landfilling not only accelerates the shortage of landfills, but also in the case of a plasma display panel device, the surface layer formed on the front substrate or the rear substrate has a problem. Since the sealing material contains harmful substances such as lead, the harmful substances must be solidified and landfilled. In addition, the glass substrates used for the front and rear substrates are large in size in order to increase the size of the screen, and since they occupy a large volume and weight in the product, they are environmentally and cost-effective. Is also desired to be reused.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a method of separating a front substrate and a rear substrate without discarding the plasma display panel. An object of the present invention is to remove a surface layer and a sealing material formed on a substrate so that they can be reused as a glass material.

[0006]

In order to solve this problem, a plasma display panel separating method according to the present invention is directed to a method in which a blade is pressed against a sealing material between a front substrate and a rear substrate, and vibration is applied to the blade. The sealing material is cut along the application region of the sealing material to separate the front substrate and the rear substrate.

In a plasma display panel separating apparatus according to a second aspect of the present invention, a front substrate in which pixel electrodes are formed on a glass substrate and a rear substrate in which pixel electrodes are formed on a glass substrate and a phosphor is applied are sealed. A mounting table for mounting the plasma display panel sealed by the above, and pressed against the sealing material from between the front substrate and the rear substrate of the plasma display panel held by the tool post and mounted on the mounting table. The blade, a vibration driving device that applies vibration to the blade in a direction of pressing against the sealing material, and moving the blade post in a plane direction of the plasma display panel to cut the sealing material by the blade. And a feed drive device for advancing.

[0008]

FIG. 1 shows a structure of a plasma display panel 12, and FIG.
(B) is a front view. As shown in FIGS. 1A and 1B, the front substrate 1 and the rear substrate 2 are sealed with a sealing material 3,
Sealing material 3 between sealed front substrate 1 and back substrate 2
A discharge gas such as neon / xenon is sealed in a space 11 surrounded by.

FIG. 2 shows a step of carrying out the method for separating the plasma display panel 12 according to one embodiment of the present invention. The sealing material 3 between the front substrate 1 and the rear substrate 2 of the plasma display panel 12 is used. , Tool post 13
3A shows a state in which the blade 4 held in FIG. 1 is inserted, FIG. 3A is a plan view thereof, and FIG. In this state, while applying vibration to the blade 4 by the vibration driving device 6, the bonding state between the sealing material 3 near the contact portion of the blade 4 and the front substrate 1 and the back substrate 2 is released, and the tool post 13 is fed. The cutter 4 is fed along the application area of the sealing material 3 by the feed driving device 7 for driving the sealing material 3, and the sealing material 3 is cut and advanced to release the bonded state. This process is similarly performed on the other three sides of the panel, so that the front substrate 1 and the rear substrate 2
And separated.

The blade 4 has, for example, a repetition frequency of 10
The front substrate 1 and the rear substrate 2 can be satisfactorily separated by feeding the blade 4 while maintaining the feed speed at a constant speed within 100 mm / s while applying micro-vibration at a moving distance of 1 mm or less within 0 Hz.

As a preparatory operation before panel separation in the above-described process, the plasma display panel 12 is set on the mounting table 10 of the plasma display panel 12, and the tool 4 is moved by the tool post front-rear device 8 and the tool post up-down device 9.
Is precisely set at the position of the sealing material 3. Further, the blade 4 is moved by a stroke 1
The blade 4 is attached to the sealing material 3 by means of a blade pressure adjusting spring 5 of about 0 mm.
Contact by the force of the spring pressure. It is to be noted that the pressing force adjusting spring 5 keeps the position of the blade 4 and the sealing material 3 in a state of being compressed to about half of the stroke 10 mm. During the feeding operation of the blade 4, the blade 4 is kept in a position for accurately transmitting vibration to the sealing material 3.

[0012]

As described above, according to the present invention, the plasma display panel, which has been conventionally disposed of as a defective product in the process and a waste product after use, can be replaced with the front substrate without any change. The blade is inserted into the sealing material between the substrate and the back substrate, and while the blade is vibrated, the blade is fed along the application region of the sealing material to sequentially release the bonded state, thereby causing the plasma display panel to face the front side. An advantageous effect is obtained in that the substrate can be separated into a substrate and a rear substrate, and the surface layer and the sealing material formed on the separated front and rear substrates can be removed and reused as a glass material.

[Brief description of the drawings]

FIG. 1A is a plan view showing a configuration of a plasma display panel. FIG. 1B is a front view showing a configuration of a plasma display panel.

FIG. 2A is a plan view showing a method of separating a plasma display panel. FIG. 2B is a front view showing a method of separating a plasma display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front board 2 Back board 3 Sealing material 4 Knife 6 Vibration drive 7 Feed drive 10 Placing table 12 Plasma display panel 13 Tool post

Continued on the front page (72) Inventor Motoaki Ito 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Person Toru Sugita 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5C012 AA09 5C040 JA25 JA31

Claims (2)

[Claims] 1. A front surface of a plasma display panel manufactured by sealing a front substrate having a pixel electrode formed on a glass substrate and a rear substrate having a pixel electrode formed on the glass substrate and applying a phosphor with a sealing material. A blade is pressed against the sealing material from between the substrate and the back substrate, and the front substrate is sealed by cutting the sealing material along the application region of the sealing material while applying vibration to the blade. A method for separating a plasma display panel from a rear substrate. 2. A mounting table for mounting a plasma display panel in which a front substrate having a pixel electrode formed on a glass substrate and a rear substrate having a pixel electrode formed on the glass substrate and coated with a phosphor are sealed with a sealing material. A blade that is held by a tool rest and is pressed against the sealing material from between the front substrate and the rear substrate of the plasma display panel placed on the placing stand, and the cutting tool is pressed against the sealing material. A plasma display panel separating apparatus, comprising: a vibration driving device that applies vibration in a direction to be applied; and a feed driving device that moves the tool post in a plane direction of the plasma display panel to cause the cutting tool to cut the sealing material.