JP4613372B2 - Glass panel separation method and separation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for separating a panel portion and a funnel portion of a cathode ray tube to be discarded / regenerated, or a separation method and a separation device for a plasma display panel, a liquid crystal panel, etc. having a flat main plane.
[0002]
[Prior art]
For the purpose of effective use of resources and preservation of the global environment, cathode ray tubes such as waste television are separated and disassembled into a panel part and a funnel part, and are separately recycled (recycled) for each constituent material. As a method for separating the cathode ray tube into a panel portion and a funnel portion, for example, Japanese Patent Laid-Open No. 62-208525 is proposed. In this case, the joint between the panel glass and the funnel glass is detected and cut from the entire circumference with a disk cutter (grinding stone or diamond wheel).
[0003]
In JP-A-7-57641, the frit glass at the joint is immersed in about 40 ° C. and 10% nitric acid, and uniformly dissolved in a range of about 1 to 2 mm from the valve side wall. About 10 ° C. cold water is alternately applied to the entire bulb to generate a crack that circulates around the frit glass portion to cleave the panel portion and the funnel portion.
[0004]
[Problems to be solved by the invention]
However, the method disclosed in Japanese Patent Laid-Open No. 62-208525 requires replacement as the disk cutter is consumed, making continuous unattended operation 24 hours a day and night difficult.
Japanese Laid-Open Patent Publication No. 7-57641 is a wet method and requires solvent management and solvent disposal equipment for preventing pollution. In addition, the processing time per unit is long, which may increase the cost.
[0005]
It is an object of the present invention to carry out cutting and separation of a cathode ray tube in a substantially dry manner and efficiently.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the method for separating a glass panel of the present invention is a method for separating a glass panel of a flat display panel in which a front glass panel and a rear glass panel are bonded together, and the front glass panel and the rear surface Cutting the peripheral edges of the four sides of the flat display panel to which the glass panel is connected, and separating the flat display panel into the front glass panel and the rear glass panel, In the cutting step, the peripheral portion of the flat display panel is cut in the order of the first long side, the second long side, the first short side, and the second short side of the flat display panel. It is characterized by that.
Further, the glass panel separating apparatus of the present invention is a glass panel separating apparatus for a flat display panel in which a front glass panel and a rear glass panel are bonded to each other, and the front glass panel and the rear glass panel are connected to each other. A cutting device that cuts the peripheral edges of four sides of the flat display panel, and a separation device that separates the flat display panel into the front glass panel and the rear glass panel, and the cutting device includes: The peripheral portion of the flat display panel is cut in the order of the first long side, the second long side, the first short side, and the second short side of the flat display panel. Features.
[0007]
The critical pressure of water is 22.12 MPa (1 megapascal (MPa) ≈10 kg / cm @ 2) and the critical temperature is 374.15.degree. When the pressure is higher than the critical pressure and the liquid temperature is lower than the critical temperature, the water is jetted from the nozzle. To cause supersonic flow. At this time, the jet becomes a two-phase flow of a gas phase and a droplet and gives a mechanical and thermal shock to the object to be crushed. Further, depending on the type of the target object, a chemical destructive force by a hydrothermal reaction is applied.
An object can be crushed by applying these mechanical, thermal, and chemical destructive forces to an object such as a casing or a household appliance component made of a resin member, a metal member, a glass member, a ceramic member, or the like. . Moreover, the high temperature / high pressure water released into the atmosphere is instantly vaporized, and there is almost no waste water to be treated.
[0008]
FIG. 5 shows a conceptual block diagram of a water jet generating apparatus constituting the apparatus of the present invention. In FIG. 5, the ultra-high pressure water pressurized (about 100 to 300 MPa) by the ultra-high pressure water jet pump 71 is continuously heated (about 100 to 350 ° C.) by the ultra-high pressure water heating device 72. Sprayed from the tip.
An ultrahigh pressure pipe cooling device 74 is disposed between the ultrahigh pressure water jet pump 71 and the ultrahigh pressure water heating device 72, and the ultrahigh pressure water jet pump 71 and the ultrahigh pressure pipe cooling device 74 are connected by an ultrahigh pressure pipe 75. The ultrahigh pressure pipe cooling device 74 and the ultrahigh pressure water heating device 72 and the ultrahigh pressure water heating device 72 and the nozzle head 73 are connected by ultrahigh pressure heat resistant piping 76 and 77, respectively.
The ultra-high pressure pipe cooling device 74 cools the heat conducted from the ultra-high pressure water heating device 72 through the ultra-high pressure heat-resistant piping 76 so that the ultra-high pressure water jet pump 71 is not adversely affected by the heat.
[0009]
The ultra-high pressure water jet pump 71 pressurizes water with a plunger or a pressure intensifier to generate ultra-high pressure water (maximum pressure Pmax≈400 MPa). The ultra high pressure water heating device 72 is a device that heats the ultra high pressure water pressurized by the ultra high pressure water jet pump 71 (temperature Tmax≈350 ° C.).
The nozzle head 73 is equipped with a water jet nozzle (not shown) having an inner diameter of about φ0.1 to φ2.0 mm in the head, and jets high temperature / high pressure water. The super high pressure pipe cooling device 74 is a device that cools the pipe and cools the heat conducted from the super high pressure water heating device 72 so that it is not transmitted to the rear equipment such as the super high pressure water jet pump 71.
[0010]
The cathode ray tube is mounted on a dedicated transport pallet and transported to a water jet injection processing position by a transport conveyor device. Thereafter, the cathode ray tube is lifted to a predetermined height through a through hole provided in the central portion of the transport pallet, and in this state, the outer peripheral surface of the cathode ray tube is subjected to water jet injection processing.
[0011]
As a first means for performing water jet injection processing on the entire circumference of the cathode ray tube, the cathode ray tube is fixed, for example, a water jet injection nozzle (nozzle head) is held at the tip of an arm of a 5-axis control robot, And implemented. As a second means, the cathode ray tube is rotated to keep the water jet spray nozzle at a predetermined distance from the processing surface.
[0012]
When rotating the cathode ray tube for processing, it goes without saying that the water jet spray nozzle goes in and out (separates) corresponding to the peripheral surface of the cathode ray tube, and the gap between the peripheral surface and the nozzle tip is automatically fixed. Needless to say.
As a means for making the gap constant, a sensor using the back pressure of the air may be used. The number of water jet injection nozzles is not limited to one, but may be a plurality of locations such as two opposing locations and four locations corresponding to each peripheral surface of the cathode ray tube to improve the water jet injection efficiency. . Further, the cathode ray tube may be processed by alternately rotating forward and reverse.
[0013]
It is desirable to process the joint portion of the panel portion and the funnel portion or the vicinity thereof as a target portion to be subjected to the water jet injection processing. Any method may be used as the means for detecting the joint. For example, detection using a CCD camera, a touch sensor using a stylus, a sensor using the back pressure of the air may be used. Of course, instead of detecting the joint portion, the outer dimensions of the cathode ray tube may be measured, or the water jet injection site may be determined based on the information of the product number detection.
[0014]
With the above configuration, the method and apparatus for separating a cathode ray tube of the present invention can separate the cathode ray tube into a panel portion and a funnel portion at a high speed at a substantially dry type. As a result, the recycling rate of cathode ray tubes is improved, which is useful for environmental conservation and effective use of resources.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, water that is pressurized to a critical pressure or higher and heated to a temperature not lower than 100 ° C. and not higher than the critical temperature is sprayed from the nozzle to the outer peripheral portion of the cathode ray tube, and the panel portion and the funnel This is a cathode ray tube separation method characterized by separating the parts from each other. The cathode ray tube can be separated into a panel part and a funnel part at a high speed in a substantially dry manner, eliminating the need for exchanging cutting tools. Has an effect.
[0016]
According to a second aspect of the present invention, there are provided means for supporting and rotating the cathode ray tube, water injection means, water injection nozzle driving means for driving the water injection nozzle so that three-dimensional shape processing is possible, and a transport pallet on which the cathode ray tube is mounted. And a transport conveyor for transporting the transport pallet, wherein the water is pressurized to a critical pressure or higher, and further heated to a range of 100 ° C. or higher and a critical temperature or lower. This is an apparatus that can separate the cathode ray tube into a panel part and a funnel part at a high speed in a substantially dry manner, enabling continuous processing.
[0017]
【Example】
A cathode ray tube separation method and a separation apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
[0018]
(Example)
FIG. 1 is a conceptual block diagram of a cathode ray tube separating apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the main part of FIG. 1, FIG. 3 is a perspective view of a cathode ray tube used for explaining the present invention, and FIG. The principal part side view which shows the concept of the state which isolate | separated the pipe | tube into the panel part and the funnel part, FIG. 5: shows the block diagram of the concept of the water jet generator which comprises this invention apparatus.
[0019]
1 to 4, reference numeral 1 is a cathode ray tube (CRT), 1A is a funnel section, 2 is a panel section, 73 is a nozzle head for jetting water (water jet) at a super high pressure and below a critical temperature, and 20 is the CRT. A transport pallet for carrying and transporting the transport pallet, 30 a transport conveyor for transporting the transport pallet in a predetermined direction, and 100 a cathode ray tube separator.
[0020]
In FIG. 1, a cathode ray tube separation apparatus 100 according to the present invention has nozzle heads 73 which are arranged to face each other at two locations. The water jet is supplied from the water jet generator shown in FIG.
The nozzle head 73 is configured to be detachable from the side of the cathode ray tube 1 by driving means such as a motor or an air cylinder, and is configured to always maintain a predetermined gap from the cathode ray tube 1.
[0021]
The position data of the joint portion between the funnel portion 1A and the panel portion 2 is determined in advance in a previous process (not shown) and is commanded to the nozzle head 73 driving means. That is, it is determined by means such as detection by a sensor, measurement of external dimensions of a cathode ray tube, or product number recognition.
[0022]
The cathode ray tube 1 is mounted on a transfer pallet 30 and is transferred by the transfer conveyor 30 to a predetermined position below the cathode ray tube separator 100.
The transport pallet 20 is provided with a through hole 21 at the center, and allows a CRT suction pad (not shown) to move up and down and rotate.
The CRT suction pad sucks and mounts the panel display surface of the CRT 1. Further, the CRT suction pad is driven so as to be able to move up and down by rotating the CRT forward and backward by a plurality of motors and the like.
[0023]
Next, the operation of separating and processing the cathode ray tube using the above-described configuration apparatus will be described. First, the transport pallet 20 carrying the CRT 1 is carried into the lower part of the cathode ray tube separator 100. (Step 1)
Next, the transport pallet 20 is positioned at a predetermined position. Next, an elevating unit (not shown) is activated and the CRT suction pad is lifted while supporting the panel surface of the CRT 1, and the panel surface is vacuum-sucked and fixed. At the same time, a CRT pressing means (not shown) is lowered from above by a driving means such as a cylinder, and presses the vicinity of the neck portion of the CRT 1 to be clamped by the CRT suction pad. (Step 2)
Next, the laser beam emitting nozzle 3 moves forward toward the CRT 1 and stops at a predetermined interval from the CRT 1 side portion. (Step 3)
Thereafter, at the same time as the CRT 1 starts rotating, a water jet is sprayed to cut the joint glass of the CRT 1. The nozzle head 73 is driven by means such as a cylinder or a pulse motor in synchronism with the rotation of the CRT 1, and is separated from and connected to the CRT 1 to keep a constant distance from the CRT 1.
When CRT1 is rotated by an angle of 180 degrees (1/2 rotation) plus α, cutting of the entire circumference of the CRT is completed. (Step 4)
If complete cutting is difficult by one water jet spray scanning, the CRT 1 may be continuously rotated to completely cut and separate. Of course, the processing procedure may be arbitrarily set such that the rotation direction of the CRT is alternately reversed.
[0024]
When the cutting of the CRT 1 is completed, the CRT pressing means is raised, and then the CRT suction pad is lowered. Thereafter, the CRT 1 is placed again on the transport pallet 20 and carried out for the next process. (Step 5)
Thereafter, the panel portion and the funnel portion go to the regeneration process step separately.
[0025]
In the above embodiment, instead of rotating the CRT 1, the CRT 1 may be fixed without rotating, and the nozzle head 73 side may be rotated around the CRT 1. As a means for rotating the nozzle head 73 in that case, for example, an arbitrary means such as a three-axis control robot of X, Y, Z or a five-axis control robot capable of processing a three-dimensional shape (three-dimensional shape) is used. That's fine.
[0026]
With the above-described configuration, the cathode ray tube separation apparatus of the present invention separates a 28-inch CRT into a panel portion and a funnel portion at a rate of about one in about 10 seconds. Moreover, it can process by a substantially dry type.
[0027]
The method and apparatus in the present invention are not limited to the cathode ray tube panel and funnel separation processing. For example, water that is pressurized to a pressure higher than the critical pressure and heated to a temperature not lower than 100 ° C. and not higher than the critical temperature is sprayed from the nozzle to the cathode ray tube to cut or cut any portion of the cathode ray tube. Needless to say.
[0028]
Further, the separation object is not limited to the cathode ray tube. It may be used for cutting or separating a flat image-formed panel such as a plasma display panel, a liquid crystal display panel, a fluorescent display tube, or the like.
As shown in FIG. 6, the peripheral portion of the video display panel 61 is cut over four sides in the order of the first to fourth cutting lines, and the two laminated glasses are separated into a front panel 61A and a rear panel 61B. However, it may be recycled.
[0029]
【The invention's effect】
As described above, according to the present invention, the panel portion and the funnel portion of the cathode ray tube can be separated and processed at high speed in a substantially dry manner.
Further, the separation work can be automated, and the separation and regeneration process after removal is facilitated. As a result, the recycling rate is improved, which helps environmental conservation and effective use of resources.
[Brief description of the drawings]
FIG. 1 is a side view of a concept of a cathode ray tube separating apparatus according to an embodiment of the present invention. FIG. 2 is a plan view of an essential part of FIG. 1. FIG. FIG. 4 is a side view of the main part of the panel part and funnel part separated using FIG. 1. FIG. 5 is a conceptual diagram of a water jet generator constituting the dismantling apparatus of the present invention. The perspective view of the concept of the image display panel separation method in the example
1 CRT (cathode ray tube / CRT)
DESCRIPTION OF SYMBOLS 1A Funnel part 2 Panel part 4 Refrigerant supply nozzle 20 Conveyance pallet 21 Through-hole 30 Conveyor 61 Image display panel 61A Front panel 61B Rear panel 71 Ultrahigh pressure water jet pump 72 Ultrahigh pressure water heating device 73 Nozzle head 74 Ultrahigh pressure piping cooling device 75 Super high pressure piping 76, 77 Ultra high pressure heat resistant piping 100 Cathode ray tube separation device

Claims (4)

A method for separating a glass panel of a flat display panel in which a front glass panel and a rear glass panel are bonded together,
Cutting the peripheral edges of the four sides of the flat display panel to which the front glass panel and the rear glass panel are connected;
Separating the flat display panel into the front glass panel and the rear glass panel ,
In the cutting step, the peripheral portion of the flat display panel is cut in the order of the first long side, the second long side, the first short side, and the second short side of the flat display panel. A method for separating a glass panel.   The cutting process is performed by injecting water, which is pressurized to a critical pressure or higher and heated to a temperature of 100 ° C. or higher and below the critical temperature, from the nozzles to the peripheral edges of the four sides of the flat display panel. The glass panel separation method according to claim 1, wherein the glass panel is cut. A glass panel separating device for a flat display panel in which a front glass panel and a rear glass panel are bonded together,
A cutting device for cutting the peripheral portions of the four sides of the flat display panel to which the front glass panel and the rear glass panel are connected;
A separator for separating the flat display panel into the front glass panel and the rear glass panel ;
The cutting apparatus cuts a peripheral portion of the flat display panel in the order of the first long side, the second long side, the first short side, and the second short side of the flat display panel. An apparatus for separating a glass panel, wherein The cutting apparatus pressurizes to a pressure higher than the critical pressure, and further performs a cutting process by injecting water, which is heated to a temperature not lower than 100 ° C. and not higher than the critical temperature, onto the peripheral edges of the four sides of the flat display panel. The glass panel separating apparatus according to claim 3, further comprising a nozzle.

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