JP2001319576A - Method for removing aluminum-deposited membrane applied to panel portion and equipment therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method in which after separating a cathode-ray tube into a funnel portion and a panel portion, an aluminum-deposited membrane or the like applied on the inner plane of the panel is removed. SOLUTION: The inner side of a side wall of a panel 120 is polished with a cylindrical face 52 of an elastic grinder 50, and simultaneously, a part of a bottom face is polished with a conical face 51 of the grinder tip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention separates a cathode ray tube into a funnel portion and a panel portion in order to recycle a discarded cathode ray tube (CRT). It relates to the method of removing.

[0002]

2. Description of the Related Art As a recycling method of a cathode ray tube constituting a television receiver, a display monitor or the like, for example, Japanese Patent Application Laid-Open No. Hei 9-115445 has been proposed.
In this case, the panel portion recycling method involves scraping off the phosphor provided on the inner surface side of the panel with a rotating brush and removing it by suction.

[0003]

Problems to be Solved by the Invention
In the case of the method disclosed in Japanese Patent Application Laid-Open No. 5 (1999) -2005, the phosphor provided on the panel phosphor screen can be efficiently written off and collected. However, since the AL (aluminum) vapor-deposited film provided on the inner surface of the panel has a strong adhesive force and the vapor-deposited film itself is extended, it is difficult to remove the film by brush polishing. Further, in the method of grinding and removing using a normal rotating grindstone, since the inner wall surface of the panel portion is an irregular curved surface, the contact of the grindstone surface is poor, and a long time is required for peeling.

[0004] It is an object of the present invention to efficiently polish and remove an AL vapor deposition film or the like provided on the inner surface of a panel section with a light work load.

[0005]

In order to solve the above-mentioned problems, the present invention provides a method of removing an AL vapor-deposited film or the like attached to an inner surface of a panel section by using a rotating rubber-like elastic grindstone. The side is abutted and moved along the inner wall surface of the panel to polish.

[0006] Also, an AL vapor deposition apparatus having an arm portion of a robot provided with an elastic grindstone having a conical surface at the tip, an electric tool for rotating and driving the elastic grindstone, and a dust collecting nozzle arranged near the elastic grindstone. A film removing device was used. The elastic grindstone has a rubber hardness of about 50 to 60, and is naturally configured such that abrasive grains such as glass, alumina, and carborundum are always exposed on the grindstone surface. The shape of the elastic grindstone was a cylinder having a conical surface at the tip. The diameter of the cylindrical portion of the elastic grindstone was about 3 cm, the number of revolutions was about several hundred to 3000 revolutions per minute, and the pressing force of the elastic grindstone on the polishing surface was about several hundred grams. The moving trajectory of the elastic grindstone was substantially rectangular in shape corresponding to the inner wall shape of the cathode ray tube panel part.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, an elastic grindstone having a conical surface at a tip abuts on an inner wall surface of a panel portion in a rotating state and moves along the inner wall surface of the panel portion. The removal of the AL vapor deposition film attached to the panel portion, wherein the inner surface of the side wall of the panel is simultaneously polished with the cylindrical surface of the elastic grindstone and a part of the bottom of the panel portion is simultaneously polished with the conical surface of the elastic grindstone. With this method, the AL vapor-deposited film or the like attached to the inner surface of the panel can be efficiently removed in a short time.

Further, a second aspect of the present invention provides a robot arm comprising: an elastic grindstone having a conical surface at a tip end; an electric tool for rotating and driving the elastic grindstone; and a dust collecting nozzle arranged near the elastic grindstone. This is an apparatus for removing an AL vapor deposition film, which is provided in the panel section, which can automate the work of removing the AL vapor deposition film and reduce the recycling cost of the panel section.

Hereinafter, a method of removing an AL vapor deposition film attached to a panel portion in one embodiment of the present invention will be described with reference to the drawings.

[0010]

FIG. 1 is a plan view showing a method of removing an AL vapor-deposited film attached to a panel portion according to an embodiment of the present invention, and FIG.
FIG. 3 is a side view of the concept of a cathode ray tube (CRT) used for describing the present invention, and FIG. 4 is a side view of a polishing means used in one embodiment of a method for removing an AL vapor deposition film. 5 is a side view of an automatic AL vapor deposition film removing apparatus which mounts the polishing means of FIG. 4 on the arm of the robot and automatically removes the AL vapor deposition film attached to the panel. 1 to 5, reference numeral 50 denotes an elastic grindstone, 51 denotes a conical surface of a cylindrical elastic grindstone, 52
Is a cylindrical surface of a cylindrical elastic grinding wheel, 70 is a power tool, 80 is a dust collecting nozzle, 100 is a cathode ray tube, 110 is a funnel section,
Reference numeral 120 denotes a panel portion, 121 denotes a screen surface, 122 denotes a panel inner wall surface, 123 denotes a panel bottom surface (phosphor-coated surface), 1
30 is a joint surface between the funnel portion and the panel portion, 150
Denotes an AL deposited film automatic removal apparatus, 151 denotes a multi-axis control type robot, and 152 denotes a panel holding unit that holds the screen surface of the panel unit by vacuum suction.

In the method of removing the AL vapor-deposited film or the like attached to the panel portion according to the present invention, a cylindrical elastic grindstone 50 having a conical surface 51 at its tip is rotated by an electric tool 70 at about 1800 RPM, and a pressing force of 300 gm is applied. This was performed by contacting the portion to be polished to the extent and moving it in a substantially rectangular shape along the panel inner wall surface 122.

That is, the cylindrical surface 52 of the elastic grindstone 50 faces the inner wall surface 122 of the panel portion, and the conical surface 51 of the elastic grindstone 50 defines the peripheral portion of the panel bottom surface 123 (near the intersection between the panel inner wall surface and the panel bottom surface). ) Is simultaneously polished. The movement trajectory of the elastic grindstone 50 was substantially rectangular in shape corresponding to the inner wall shape of the cathode ray tube 100.

A dust collecting nozzle 80 is provided in the vicinity of the elastic grindstone 50 to collect abrasive powder.

After the screen surface 121 is vacuum-adsorbed and held by the panel holding portion 152, the inner wall surface and the bottom edge of the panel portion are provided on the arm portion of the robot 151 with the elastic whetstone 50, the electric tool 70, and the dust collecting nozzle 80. The AL-deposited film removing apparatus 150 is configured to move and polish it into a substantially rectangular shape, thereby automatically removing the AL-deposited film and the like.

[0015]

According to the above construction, the present invention can efficiently and reliably connect the AL vapor deposition film provided on the inner wall surface of the panel, the AL vapor deposition film provided on the bottom surface of the panel and the phosphor, etc. simultaneously and by one rectangular movement. Can be polished and removed. In addition, by automating the polishing operation by the robot, the recycling cost of the panel unit can be reduced.

[Brief description of the drawings]

FIG. 1 shows an AL attached to a panel according to an embodiment of the present invention.
Top view of the method of removing the deposited film

FIG. 2 is a cross-sectional view of FIG. 1 taken along line S-S.

FIG. 3 is a side view of the concept of a cathode ray tube used for describing the present invention.

FIG. 4 is a side view of the polishing means in one embodiment of the present invention.

FIG. 5 is a side view of an apparatus for removing an AL deposited film according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 50 elastic grindstone 51 conical surface 52 cylindrical surface 70 electric tool 80 dust collection nozzle 100 cathode ray tube (CRT) 110 funnel unit 120 panel unit 121 screen surface 122 panel inner wall surface 123 panel bottom surface (phosphor coated surface) 130 bonding surface 150 AL deposition Film removal device 151 Robot 152 Panel holding unit

Continuing from the front page (72) Inventor Takayuki Kube 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 3C047 HH12 3C049 AA02 AA11 AA13 CA01 CB03 3C058 AA02 AA11 AA13 CA01 CB03 5C012 AA02

Claims (3)

[Claims] 1. An AL vapor-deposited film attached to a panel part, wherein an AL vapor-deposited film attached to an inner surface of a panel part constituting a cathode ray tube is removed by abutting and moving a rotating elastic grindstone. Removal method. 2. The panel part according to claim 1, wherein the inner surface of the side wall of the panel part is polished simultaneously with the cylindrical surface of the elastic whetstone, and part of the bottom surface of the panel part is simultaneously polished with the conical surface of the tip of the whetstone. How to remove AL deposited film. 3. An elastic grindstone having a conical surface at a tip thereof,
An AL-evaporated film removing apparatus, comprising: an electric tool that rotationally drives the elastic grindstone; and a dust collecting nozzle disposed near the elastic grindstone, on an arm of the robot.