JP3922071B2 - CRT separation method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In order to recycle and reuse the discarded cathode ray tube as a cathode ray tube material, the present invention generates heat or raises the temperature in a state where the wire or strip is wound or pressed around the outer peripheral surface of the cathode ray tube to generate heat in the cathode ray tube. The present invention relates to a method for separating a panel portion and a funnel portion of a cathode ray tube using stress strain and an apparatus for implementing the method.
[0002]
[Prior art]
In order to reuse the waste cathode ray tube as a member, as a means to separate the panel part and the funnel part, heat stress strain is generated by heating the part where the scratches are given in advance along the planned separation position on the outer peripheral surface of the cathode ray tube. In such a situation, an impact was applied to the portion with an iron hammer or the like to generate a crack starting from a scratch, and the crack grew along with the thermal stress strain and separated.
[0003]
As an example, there is a cathode ray tube separation method disclosed in JP-A-2002-025447. Heating means include the use of heat conduction by pressing heat wires such as nichrome wire and radiant heat from infrared and near infrared lamps, etc., but in the recycling business field where there is a high necessity to handle waste CRTs of various sizes and shapes, As shown in FIG. 5, a belt-like nichrome wire applied with tension at both ends by some means is used as a heating element 1, wound around the outer peripheral surface 93 of the cathode ray tube 9, and energized via pressing and sliding electrons arranged at both ends. In general, means for generating heat is often used.
[0004]
[Problems to be solved by the invention]
When a heating element such as nichrome wire in a state where tension is applied is wound around the outer peripheral surface of the cathode ray tube, no pressing force acts on the outer peripheral surface side portion 95, and most of the tension is applied as a load pressing force on the outer peripheral surface corner portion 94. work.
[0005]
Therefore, the outer peripheral surface corner portion 94 has higher heat transfer to the cathode ray tube member than the outer peripheral surface side portion 95, and although the heating purpose of the cathode ray tube member is favorable, the temperature of the heating element itself is lower than the other portions. In order to generate microcracks that are the starting points of cracks and to generate spontaneous cracks, a longer time is required.
[0006]
On the other hand, when the heating element in a state where tension is applied is wound around the outer peripheral surface of the cathode ray tube, in the portion 97 where the outer peripheral surface corner portion 94 transitions to the side portion 95, the influence of the tensile strength possessed by the corner portion 94 and the heating element itself. Thus, the force in the direction of pressing the outer peripheral surface of the CRT does not work at all, and the degree of adhesion inevitably deteriorates.
[0007]
As a result, the amount of heat transferred to the CRT member is reduced, so that the generation of thermal stress strain inside the portion 97 is delayed in time from the other portions, resulting in a lack of thermal stress strain, and as the crack progresses. It was a factor that moved in an unscheduled direction.
[0008]
On the other hand, it is practically impossible to heat and treat the entire outer peripheral surface of a waste cathode ray tube composed of a plurality of curvature surfaces simultaneously and evenly with various sizes and means for heating by infrared and near infrared rays. .
[0009]
In addition, thermal energy such as infrared rays and near-infrared rays has the property of easily passing through the glass member of the object to be processed, and the internal temperature rises quickly, but the temperature gradient and thermal stress strain generation leading to the microcrack that is the starting point of the crack It is difficult to cultivate
[0010]
As a result, in order to generate cracks on the outer peripheral surface of the cathode ray tube, it is indispensable to carry out auxiliary separation work such as scratching, wiping with moisture, applying a strong impact with a hammer, and the type and size of the cathode ray tube. Some were accompanied by their careful separation assistance.
[0011]
The present invention eliminates the need for preparatory processing such as scratching and the like, as well as auxiliary work such as impact application with a hammer during separation, and is stable and highly accurate in a short processing time and independent of the size of the cathode ray tube. It is an object of the present invention to provide a very effective separation method capable of obtaining a separation state and an apparatus for carrying out the separation method.
[0012]
[Means for Solving the Problems]
The present invention presses or wraps a heating element at a scheduled separation position on the outer peripheral surface of the cathode ray tube to energize and heat the heating element with a predetermined power, while a wavelength of 0.8 to 5.6 μm emitted from an infrared or near infrared lamp. The focal area obtained by converging the thermal energy including the area with a reflector having a predetermined focal length is connected to the contact portion between the heating element and the outer periphery of the cathode ray tube, so that the heating element is replenished with heat and the temperature of the heating element is increased. In addition to preventing the decrease, a part of the focal area is blocked by the heating element, so that a thermal stress strain due to a strong tomographic temperature gradient is generated on the inner surface of the contact portion with the heating element.
[0013]
As a result, sufficient conditions for microcrack generation are established, cracks spontaneously occur with a very high probability, and cracks instantly follow the intense fault-like thermal stress strain generated on the surface and inside of these glass materials. It grows and reaches the entire circumference of the cathode ray tube member, and can be instantaneously brought into a divided state.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, the heating element is pressed or wound around the planned separation position on the outer peripheral surface of the cathode ray tube, and energized to generate heat in another state, while the infrared ray or near infrared lamp emits 0.8 to 5.6 μm. The focal region where the heat energy including the wavelength region is focused by a reflector with a predetermined focal length is connected to the contact portion with the heating element on the outer peripheral surface of the cathode ray tube, and the heating element and the outer peripheral surface of the cathode ray tube are heated by both means. The intense thermal stress strain in a tomographic shape generated on the inner surface of the heating element contact portion by raising the temperature raises sufficient conditions for generating microcracks, and is a basic configuration of the present invention.
[0015]
According to the second aspect of the present invention, in the method of separating a cathode ray tube, the focal zone shape focused at a predetermined focal length by a reflecting mirror is set to a substantially small circle, an ellipse, or a belt-like spot shape, and the focal zone is applied. As a place to perform, it is arranged at one place or a plurality of important places, and a sufficient condition fostering place for generating micro cracks as the crack starting point described in the embodiment of claim 1 is arranged at the important places.
[0016]
In the invention according to claim 3, the focal region shape of the radiant heat energy focused by the reflecting mirror is a belt-like L-shape, and one or more corners of the outer peripheral surface of the cathode ray tube around which the heating element is wound, In order to compensate for the temperature drop of the heating element itself at the corners of the outer peripheral surface of the cathode ray tube, the heating element at that location absorbs radiant heat energy and replenishes the amount of heat. This is an improvement. In addition, it prevents the generation of missing portions of thermal stress strain at the transition from the corners of the outer peripheral surface to the sides, and is intended to carry out crack growth along with the winding of the heating element during the progress of the crack. is there.
[0017]
The invention according to claim 4 is an improvement in the function and adaptability as the heating element of the present invention, and as a measure thereof, the absorption characteristics of radiant heat energy including a wavelength region of 0.8 to 5.6 μm are compared. The heat generating material has a specially superior material or a surface-treated material, and has a function of replenishing heat by radiant heat energy.
[0018]
The invention according to claim 5 is an apparatus for carrying out the method for separating a cathode ray tube according to any one of claims 1 to 5; a linear or belt-like body wound or pressed around the outer peripheral surface of the cathode ray tube; Press the belt-like body against the outer peripheral surface of the cathode ray tube and form a thermal energy focal area where the heat and radiation that is supplied and energized as needed and the thermal energy radiated by the reflecting mirror are converged. A heating mechanism composed of an infrared or near-infrared lamp and a reflector arranged so that the object and a linear or belt-like body are within the focal range, a cathode-ray tube mounting mechanism for mounting a cathode ray tube to be processed, and an outer peripheral surface of the cathode ray tube A height adjustment mechanism that adjusts the position where the heating element is wound or pressed, and the functional mechanism portions thereof are associated with each other, and a predetermined set value A control and power supply unit for operating a CRT separation apparatus characterized in that it comprises as main components.
[0019]
(Embodiment 1)
Hereinafter, the structure of Embodiment 1 of this invention is demonstrated based on drawing. The cathode ray tube 9 to be processed is installed on the cathode ray tube holding base 10 shown in FIG. 1, the heating element 1 is wound around the position where the outer peripheral surface 93 of the cathode ray tube 9 is to be separated, and both ends thereof are pressed by both-sliding electrons 2a and 2b. The tension is applied to both ends of the heating element 1 by a driving means such as a torque motor provided separately.
[0020]
On the other hand, it includes a wavelength region of 0.8 to 5.6 μm that is radiated from the infrared or near-infrared lamp 3 arranged at a predetermined gap from the contact portion of the heating element 1 and focused by the reflecting mirror 4. A focal area 6 of thermal energy 5 is connected to a contact portion 7 between the heating element 1 and the outer peripheral surface of the cathode ray tube.
[0021]
In this state, the dividing work is performed by applying predetermined power to the heating element 1 and the lamp 3 for a predetermined time to generate heat.
[0022]
In addition, power supply to the heating element 1 is carried out by using a power supply device having a constant current function, which is prepared separately, with a preset current value via both sliding electrons 2a, 2b. The control circuit device has a predetermined time.
[0023]
The shape of the focal zone 6 is circular, oblong, or short-spotted, and is applied to at least one place or a plurality of places. It is necessary to divide according to the number and the total accumulated length of the focal area 6 Reduction of time and improvement of division accuracy are recognized.
[0024]
As a situation leading to the division, intense thermal stress strain is generated along the contact portion 7 with the heating element 1 on the surface of the outer peripheral member of the cathode ray tube 9 to generate a microcrack as a starting point of the crack.
[0025]
On the other hand, in the member, intense thermal stress strain is generated in the boundary region between the temperature rising region by transmission of radiant heat energy including the wavelength region of 0.8 to 5.6 μm converged on the focal region 6 and the shielding region by the heat ray. The microcrack that is generated as a starting point of the crack is grown along with the thermal stress strain in the boundary region, and the panel portion 92 and the funnel portion 91 are separated into two members.
[0026]
FIG. 2 shows a schematic diagram of a planar arrangement when the spot-shaped focal region 6 is applied to two opposite corner portions 94 of the outer peripheral surface of the cathode ray tube 9.
[0027]
A schematic plane arrangement diagram when the focal region 6 is formed into an L shape with a curvature and applied to a tangent portion of the CRT outer peripheral surface diagonal portion 94 and the outer peripheral surface side portion 95 as a portion where the focal region 6 is connected. As shown in FIG.
[0028]
The operation of the present invention will be described with reference to FIGS. 6A, 6B, and 6C.
[0029]
The temperature measurement point position inside the outer peripheral member 93 of the cathode ray tube 9 that is in contact with the heating element 1 and that connects the focal region 6 of the infrared or near-infrared lamp 3 is indicated by the lines A, B, and C in FIG. It was set as each part cross-section position part. FIG. 6B shows the distribution of temperature after the elapse of a predetermined time in each section of the A-line, B-line, and C-line section of FIG. 6A when both means of the heating element and the lamp are applied simultaneously. Indicates. FIG. 6C shows a temperature distribution state after a predetermined time has elapsed in each part of the A-line, B-line, and C-line position cross sections when the heating element and the lamp are applied individually.
[0030]
In the result of the present invention shown in FIG. 6 (b), compared with FIG. 6 (c) when each heat source is used alone, the internal temperature of the contact portion with the heating element 1 is two kinds of heat sources. Due to the combined effect, the cross section of the B line portion clearly shifts to the high temperature side.
[0031]
In this case, the input power and time to the two types of heat sources are divided into the temperature rise region and the shield region generated inside, until the member tensile strength is exceeded and the thermal stress strain is generated spontaneously by the microcrack that becomes the crack origin. Cracks grow instantly along with the intense thermal stress strain generated in the boundary area of the, leading to separation.
[0032]
That is, preliminary work such as applying scratches, wiping with moisture, applying a strong impact with a hammer, and subsequent auxiliary work are completely unnecessary for generating microcracks as a crack starting point.
[0033]
(Embodiment 2)
Although it is the same purpose as Embodiment 1, in Embodiment 2, a sheathed heater in which a heating element is enclosed in a metal tube in an electrically insulated state is applied as a heating element pressed against the outer peripheral surface of the cathode ray tube. FIG. 4 shows a schematic plane arrangement configuration in a state where the focal region of the radiant heat energy 6 is applied to the outer peripheral surface corner portion 94 of the CRT 9 with the sheathed heater 11 pressed against the outer peripheral surface side portion 95 of the CRT 9.
[0034]
Although the sheathed heater 11 has a configuration that is somewhat flexible, since it is a tubular rod, it does not adapt to the corner portion 94 of the outer peripheral surface of the cathode ray tube, so that only the two parallel sides 95 as shown in FIG. 5 are pressed. It becomes.
[0035]
In this case, the other two sides 96 that are orthogonal to each other are heated in two stages. After heating the two sides 95 in the first half, rotate the Braun tube 90 degrees and heat the remaining two sides 96 in the second half. In many cases, the corner portions 94 that do not come into contact with each other do not generate thermal stress strain and are in an incompletely divided state.
[0036]
In order to improve this point, while the two sides 96 are heated by the sheathed heater 11, the 0.8-5.6 [mu] m radiated from the lamp 3 is radiated from the lamp 3 to one place or a plurality of places as required. The thermal energy 5 including the wavelength region is implemented by connecting the spot-like focal region 6 focused by the reflecting mirror 4, and the time for consolidating the focal region is the same as the latter time when the two sides 96 are heated. It is more effective to implement.
[0037]
【The invention's effect】
According to the present invention, the size and shape of the cathode ray tube can be achieved in a very short processing time without applying an impact by a hammer or the like after heating, or auxiliary work for division such as wiping with water. Regardless of the material or the like, it is possible to obtain a stable divided state in which the divided fracture surfaces are substantially on the same plane. Accordingly, it is possible to greatly improve the efficiency of the processing work and greatly reduce the processing cost.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic side arrangement configuration in which a focal region of radiant heat energy is connected to a key point of an outer peripheral surface of a cathode ray tube wound with a heating element. FIG. 2 is an outer surface angle of the cathode ray tube wound with a heating element. FIG. 3 is a schematic plane arrangement configuration in which the focal area of radiant heat energy is connected to the part. FIG. 3 shows a curvature as a lamp and a reflector so that the focal area of the radiant heat energy fits the corner of the outer peripheral surface of the cathode ray tube. FIG. 4 is a diagram showing a schematic plane arrangement configuration in the case of an L-shape with a ring. FIG. 5 is a diagram showing a schematic plane arrangement configuration in a situation applied to a corner portion. FIG. 5 is a diagram showing a dividing method performed by energizing heat generation by winding a conventional heating element around the outer peripheral surface of a cathode ray tube. Body winding FIG. 6B is an enlarged cross-sectional view in the thickness direction of the outer peripheral surface member of the cathode ray tube connected with the focal region, and a diagram showing the measurement position of the temperature distribution after a predetermined time has elapsed after the start of energization. FIG. 6C is a diagram showing a relative comparison of temperature distributions in FIG. 6C. FIG. 6A is a diagram showing a relative comparison of temperature distributions at various parts along the line B in FIG. 6A.
DESCRIPTION OF SYMBOLS 1 Heat generating body 2a, 2b Sliding electron 3 Infrared or near-infrared lamp 4 Reflecting mirror 5 Focused radiant heat energy 6 Focusing area 7 of a radiant heat energy The contact part 9 of a cathode ray tube outer peripheral surface and a heating element 9 CRT | CRT 10 | Sheathed heater 91 CRT funnel section 92 CRT panel section 93 CRT outer peripheral surface 94 CRT outer peripheral surface each corner 95 Braun tube outer peripheral side two sides 96 CRT outer peripheral surface other two sides 97 perpendicular to CRT outer peripheral surface CRT outer peripheral surface of the transition from each corner of the CRT outer peripheral surface to two sides of the CRT outer peripheral surface and the other two sides of the CRT outer peripheral surface orthogonal to the two sides of the CRT outer peripheral surface

Claims (5)

In the cathode ray tube separation method, in which the heating element is pressed or wound around the planned separation position on the outer peripheral surface of the cathode ray tube, the heating element is energized to generate heat, and a crack is generated in the outer peripheral surface of the cathode ray tube due to generation of thermal stress strain. A focal region in which thermal energy including a wavelength region of 0.8 to 5.6 μm radiated from a near-infrared lamp is focused in a spot shape by a reflecting mirror is connected to a contact portion between the heating element and the outer peripheral surface of the cathode ray tube. A method of separating a cathode ray tube, characterized in that it is carried out.   2. The method of separating a cathode ray tube according to claim 1, wherein the focal region shape obtained by focusing the radiant heat energy according to claim 1 is a small circle, an ellipse, or a belt-like spot shape. The focal zone shape in which the radiant heat energy is focused according to claim 1 is L-shaped when viewed from the tube axis direction, and the focal zone is connected to the heating element contact portion of the outer peripheral surface of the cathode ray tube. The method for separating a cathode ray tube according to claim 1. 4. The cathode ray tube separation method according to claim 1, wherein the heating element that is pressed or wound around the outer peripheral surface of the cathode ray tube is a sheathed heater .   An apparatus for carrying out the cathode ray tube separation method according to any one of claims 1 to 5 is a linear or belt-like body wound or pressed around an outer peripheral surface of a cathode ray tube, and the linear or belt-like body is pressed against the outer peripheral surface of the cathode ray tube. In addition, a pressing and energizing sliding electronic mechanism having a function of energizing supplied electric power as necessary, and a focal point by converging thermal energy including a wavelength region of 0.8 to 5.6 μm emitted. A cathode ray tube mounting mechanism that has a heating mechanism consisting of a near-infrared lamp and a reflecting mirror that forms an area, and a cathode ray tube that is a processing target, and has a function of adjusting the position where the heating element is wound or pressed on the outer peripheral surface of the cathode ray tube. And a power supply unit that supplies the power and a control unit that associates each of the functional mechanism units and operates based on a predetermined set value. Becoming Te CRT separation apparatus according to claim.

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