CN113325616A - Method and device for separating polaroid and glass substrate of waste liquid crystal display screen - Google Patents
Method and device for separating polaroid and glass substrate of waste liquid crystal display screen Download PDFInfo
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- CN113325616A CN113325616A CN202110604442.7A CN202110604442A CN113325616A CN 113325616 A CN113325616 A CN 113325616A CN 202110604442 A CN202110604442 A CN 202110604442A CN 113325616 A CN113325616 A CN 113325616A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/1309—Repairing; Testing
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Abstract
The invention relates to the technical field of resource regeneration, in particular to a method and a device for separating a polaroid and a glass substrate of a waste liquid crystal display screen; the heating plate is fixedly connected with the first box body, the first support frame is positioned above the first box body, the first air cylinder is fixedly connected with the first support frame, the first push rod is movably connected with the first air cylinder, and the first filter plate is rotatably connected with the first push rod and positioned in the first box body; the second box body is positioned on one side of the first box body, the second support frame is fixedly connected with the second box body, the second cylinder is fixedly connected with the second support frame, the second push rod is movably connected with the second cylinder, and the second filter plate is fixedly connected with the second push rod; and dissolving the epoxy resin adhesive between the polarizer and the glass substrate by using the epoxy resin degumming agent, and separating the polarizer from the glass substrate by using water in the second box body.
Description
Technical Field
The invention relates to the technical field of resource regeneration, in particular to a method and a device for separating a polaroid and a glass substrate of a waste liquid crystal display screen.
Background
Most of liquid crystal display screens are formed by sealing two glass substrates engraved with indium electrodes by using epoxy resin, injecting liquid crystal, and then pressing a polarizer on the outer sides of the two glass substrates. Therefore, the key to recycling and disposing the waste liquid crystal display is how to effectively separate the polarizer, the glass substrate and the ITO film for etching the indium electrode. The waste liquid crystal screen contains valuable resources such as a polaroid, a glass substrate, an ITO (indium tin oxide) coating film and the like. Wherein the polaroid and the glass substrate can be recycled, and the ITO coating film is a main raw material for recycling metallic indium.
The treatment mode of the waste liquid crystal screen adopted at present is mainly landfill and incineration, however, if the treatment means is directly adopted, the atmosphere, the soil and the water body are polluted greatly.
Disclosure of Invention
The invention aims to provide a method and a device for separating a polaroid from a glass substrate of a waste liquid crystal display screen, and aims to solve the technical problem that the treatment mode of the waste liquid crystal display screen adopted currently in the prior art is mainly landfill and incineration, but if the treatment mode is directly adopted, the atmosphere, soil and water body are polluted greatly.
In order to achieve the purpose, the invention provides a method for separating a polaroid and a glass substrate of a waste liquid crystal display screen, which comprises the following steps:
firstly adding the epoxy resin degumming agent into the first container, and then adding purified water to form a water cover;
adding a waste liquid crystal display screen into the first container, and heating the first container;
heating the waste liquid crystal display screen in the first container for a preset time, fishing out the waste liquid crystal display screen, and putting the waste liquid crystal display screen in a second container;
and adding purified water into the second container, separating the waste liquid crystal display screen in the second container, floating the polaroid obtained by separation on the water surface, and sinking the glass substrate to the bottom of the water.
Wherein, in the step of adding a waste liquid crystal display screen into the first container and heating the first container:
the heating temperature is 100-110 ℃, and the heating time is 1-1.5 h.
The invention also provides a separating device adopting the method for separating the polaroid from the glass substrate of the waste liquid crystal display screen, the separating device comprises a soaking box and a separating box, the soaking box comprises a first box body, a first support frame, a heating plate, a first air cylinder, a first push rod and a first filter plate, the heating plate is fixedly connected with the first box body and is positioned on the inner side wall of the first box body, the first support frame is fixedly connected with the first box body and is positioned above the first box body, the first air cylinder is fixedly connected with the first support frame and is positioned in the first support frame, the first push rod is movably connected with the first air cylinder and is positioned below the first air cylinder, the first filter plate is rotatably connected with the first push rod and is positioned below the first push rod, and is positioned inside the first box body; the separation box comprises a second box body, a second support frame, a second cylinder, a second push rod, a second filter plate and a water outlet valve, the second box body is fixedly connected with the first box body and is positioned on one side of the first box body, the second support frame is fixedly connected with the second box body and is positioned on one side of the second box body far away from the first box body, a rectangular hole is formed in one side of the second box body close to the second support frame, the second cylinder is fixedly connected with the second support frame and is positioned above the second support frame, the second push rod is movably connected with the second cylinder and is positioned between the second cylinder and the second filter plate, the second push rod is fixedly connected with the second push rod and is positioned in the rectangular hole, a water outlet hole is formed in the bottom of the second box body, and the water outlet valve is fixedly connected with the box body, and is located inside the drain hole.
And an epoxy resin degumming agent is arranged in the first box body, the epoxy resin bonding agent between the polaroid and the glass substrate is dissolved by using the epoxy resin degumming agent, and then the polaroid is separated from the glass substrate by water in the second box body.
The first filter plate comprises a plate body, a rotating shaft and a magnet block, the rotating shaft is movably connected with the first push rod and is located at the bottom of the first push rod, the plate body is fixedly connected with the rotating shaft and is located below the first push rod, and the magnet block is fixedly connected with the plate body and is located inside the plate body.
The plate body can rotate around the rotating shaft by utilizing the magnetism of the magnet block.
The soaking box further comprises a metal block, wherein the metal block is fixedly connected with the first support frame, is positioned below the first support frame and is positioned above the magnet block.
The metal block is positioned on one side, far away from the second box body, of the first support frame, so that one side, provided with the magnet block, of the plate body is tilted.
The soaking tank further comprises inclined plates, and the inclined plates are fixedly connected with the first tank body and the second tank body respectively and are positioned above the first tank body and the second tank body.
After the plate body inclines, the waste liquid crystal display screen on the upper portion slides to the upper portion of the inclined plate along the inclined plane, and then slides to the inside of the second box body along the inclined plate.
The invention relates to a method and a device for separating a polaroid from a glass substrate of a waste liquid crystal display, wherein when separation is carried out, a first filter plate is positioned at the bottom of a first box body, an epoxy resin degumming agent is arranged in the first box body, the waste liquid crystal display is placed in the first box body, a heating plate is started, the epoxy resin degumming agent is used for dissolving an epoxy resin adhesive between the polaroid and the glass substrate, a first air cylinder is started, a first push rod is used for driving the first filter plate to ascend, so that the dissolved waste liquid crystal display is lifted and placed in a second box body, the polaroid is separated from the glass substrate by water in the second box body, the polaroid obtained by separation floats on the water surface due to different densities, the glass substrate sinks to the water bottom, the second air cylinder is started, the second push rod is used for pushing the second filter plate into the second box body, the polaroid and the glass substrate are separated, the water outlet valve is opened, after water is drained, the polaroid falls above the second filter plate, the glass substrate falls at the bottom of the second box body, through the structure, the epoxy resin degumming agent is used for dissolving the polaroid, and then water is used for separation, so that pollutants are not produced in the separation process, and the polaroid and the glass substrate can be recycled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the steps of the method for separating the polarizer from the glass substrate of the waste liquid crystal display panel according to the present invention.
Fig. 2 is a schematic structural diagram of a device for separating a polarizer from a glass substrate of a waste liquid crystal display panel according to the present invention.
Fig. 3 is a cross-sectional view of the first cylinder provided by the present invention as it contracts.
Fig. 4 is a plan view of a first filter plate according to the present invention.
Fig. 5 is a schematic structural view of a circulation assembly provided by the present invention.
1-soaking box, 11-first box body, 12-first support frame, 13-heating plate, 14-first cylinder, 15-first push rod, 16-first filter plate, 161-plate body, 162-rotating shaft, 163-magnet block, 17-metal block, 18-inclined plate, 2-separation box, 21-second box body, 211-rectangular hole, 212-water discharge hole, 22-second support frame, 23-second cylinder, 24-second push rod, 25-second filter plate, 26-water outlet valve, 3-circulation component, 31-water tank, 32-water discharge pipe, 33-booster pump, 34-water outlet pipe, 35-third support frame and 36-spray head.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, the present invention provides a method for separating a polarizer from a glass substrate of a waste liquid crystal display, comprising the following steps:
s1: firstly adding the epoxy resin degumming agent into the first container, and then adding purified water to form a water cover;
s2: adding a waste liquid crystal display screen into the first container, and heating the first container at the heating temperature of 100-110 ℃ for 1-1.5 h;
s3: after heating is completed, fishing out the waste liquid crystal display screen in the first container, and putting the waste liquid crystal display screen in a second container;
s4: and adding purified water into the second container, separating the waste liquid crystal display screen in the second container, floating the polaroid obtained by separation on the water surface, and sinking the glass substrate to the bottom of the water.
In this embodiment, utilize epoxy to take off the gluing agent and dissolve the polaroid, heating temperature is no longer than 120C, can not harm the polaroid, utilizes the density difference of polaroid and glass substrate, separates through water, can not produce the pollutant among the in-process of separation, and can recycle.
Referring to fig. 2 to 5, the present invention further provides a separating device using the method for separating a polarizer from a glass substrate of a used liquid crystal display, where the separating device includes a soaking tank 1 and a separating tank 2, the soaking tank 1 includes a first tank 11, a first supporting frame 12, a heating plate 13, a first cylinder 14, a first push rod 15 and a first filter plate 16, the heating plate 13 is fixedly connected to the first tank 11 and is located on an inner side wall of the first tank 11, the first supporting frame 12 is fixedly connected to the first tank 11 and is located above the first tank 11, the first cylinder 14 is fixedly connected to the first supporting frame 12 and is located inside the first supporting frame 12, the first push rod 15 is movably connected to the first cylinder 14 and is located below the first cylinder 14, the first filter plate 16 is rotatably connected with the first push rod 15, is positioned below the first push rod 15, and is positioned inside the first box body 11; the separation box 2 comprises a second box body 21, a second support frame 22, a second cylinder 23, a second push rod 24, a second filter plate 25 and a water outlet valve 26, the second box body 21 is fixedly connected with the first box body 11 and is positioned on one side of the first box body 11, the second support frame 22 is fixedly connected with the second box body 21 and is positioned on one side of the second box body 21 far away from the first box body 11, a rectangular hole 211 is formed in one side of the second box body 21 close to the second support frame 22, the second cylinder 23 is fixedly connected with the second support frame 22 and is positioned above the second support frame 22, the second push rod 24 is movably connected with the second cylinder 23 and is positioned between the second cylinder 23 and the second box body 21, the second filter plate 25 is fixedly connected with the second push rod 24 and is positioned in the rectangular hole 211, the bottom of the second box 21 is provided with a drainage hole 212, and the outlet valve 26 is fixedly connected with the box and is located inside the drainage hole 212.
In this embodiment, when performing the separation, the first filter plate 16 is located at the bottom of the first box 11, the epoxy resin degumming agent is disposed in the first box 11, the waste liquid crystal display is placed in the first box 11, the heating plate 13 is started, the epoxy resin degumming agent is used to dissolve the epoxy resin adhesive between the polarizer and the glass substrate, the first cylinder 14 is started, the first push rod 15 is used to drive the first filter plate 16 to ascend, so as to lift the dissolved waste liquid crystal display and place the waste liquid crystal display in the second box 21, the polarizer and the glass substrate are separated by the water in the second box 21, due to different densities, the polarizer obtained by the separation floats on the water surface, the glass substrate sinks to the bottom, the second cylinder 23 is started, the second push rod 24 is used to push the second filter plate 25 into the second box 21, the polaroid and the glass substrate are separated, the water outlet valve 26 is opened, after water is drained, the polaroid falls above the second filter plate 25, the glass substrate falls at the bottom of the second box body 21, through the structure, the epoxy resin degumming agent is used for dissolving the polaroid, and then water is used for separation, so that pollutants are not produced in the separation process, and the polaroid can be recycled.
Further, the first filter plate 16 includes a plate body 161, a rotating shaft 162 and a magnet block 163, the rotating shaft 162 is movably connected to the first push rod 15 and is located at the bottom of the first push rod 15, the plate body 161 is fixedly connected to the rotating shaft 162 and is located below the first push rod 15, and the magnet block 163 is fixedly connected to the plate body 161 and is located inside the plate body 161; the soaking tank 1 further comprises a metal block 17, wherein the metal block 17 is fixedly connected with the first support frame 12, is positioned below the first support frame 12, and is positioned above the magnet block 163; the soaking tank 1 further comprises an inclined plate 18, and the inclined plate 18 is fixedly connected with the first tank body 11 and the second tank body 21 and is positioned above the first tank body 11 and the second tank body 21.
In this embodiment, the magnetism of the magnet block 163 makes the plate body 161 rotate around the rotating shaft 162, after soaking, the first air cylinder 14 lifts the first filter plate 16, the metal block 17 is located on one side of the second box 21 away from the first support frame 12, so that the plate body 161 has one side of the magnet block 163 tilted, after the plate body 161 is tilted, the waste liquid crystal display screen on the top slides to the top of the inclined plate 18 along the inclined plane, and then slides to the inside of the second box 21 along the inclined plate 18.
Further, the device for separating the polarizer from the glass substrate of the waste liquid crystal display screen further comprises a circulating assembly 3, wherein the circulating assembly 3 comprises a water tank 31 and a water drainage pipe 32, the water drainage pipe 32 is fixedly connected with the water outlet valve 26 and is positioned below the second box body 21, and the water tank 31 is fixedly connected with the water drainage pipe 32 and is positioned below the water drainage pipe 32.
In this embodiment, after the outlet valve 26 is opened, water enters the drain pipe 32 through the drain hole 212, and the water used for separation in the second tank 21 is collected by the drain pipe 32, thereby facilitating the next separation.
Further, the circulating assembly 3 further comprises a booster pump 33 and a water outlet pipe 34, the booster pump 33 is fixedly connected with the water tank 31 and is positioned above the water tank 31, and the water outlet pipe 34 is fixedly connected with the booster pump 33 and is positioned above the second tank 21.
In this embodiment, the water in the water tank 31 is pumped out by the booster pump 33 and is sent into the second tank 21 through the water outlet pipe 34, thereby completing automatic water addition.
Further, circulation subassembly 3 still includes third support frame 35, third support frame 35 with second box 21 fixed connection, and be located the top of second box 21, shower nozzle 36 and third support frame 35 fixed connection, and be located the below of third support frame 35, the one end of outlet pipe 34 with booster pump 33 fixed connection, the other end of outlet pipe 34 with shower nozzle 36 fixed connection.
In this embodiment, after the separation, the polarizer falls on the second filter plate 25, and at this time, there is no water in the second box 21, and the water in the water tank 31 is pumped out by the booster pump 33, and the high-pressure water flow is generated by the sprayer 36 to wash the polarizer, so as to remove the residue on the polarizer and improve the separation effect.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A method for separating a polaroid and a glass substrate of a waste liquid crystal display screen is characterized by comprising the following steps:
firstly adding the epoxy resin degumming agent into the first container, and then adding purified water to form a water cover;
adding a waste liquid crystal display screen into the first container, and heating the first container;
heating the waste liquid crystal display screen in the first container for a preset time, fishing out the waste liquid crystal display screen, and putting the waste liquid crystal display screen in a second container;
and adding purified water into the second container, separating the waste liquid crystal display screen in the second container, floating the polaroid obtained by separation on the water surface, and sinking the glass substrate to the bottom of the water.
2. The method of claim 1, wherein in the step of adding a used liquid crystal display to the first container and heating the first container:
the heating temperature is 100-110 ℃, and the heating time is 1-1.5 h.
3. The separation apparatus using the method of separating a used liquid crystal display polarizer from a glass substrate according to claim 2,
the device for separating the polaroid from the glass substrate of the waste liquid crystal display screen comprises a soaking box and a separating box, wherein the soaking box comprises a first box body, a first support frame, a heating plate, a first air cylinder, a first push rod and a first filter plate, the heating plate is fixedly connected with the first box body and is positioned on the inner side wall of the first box body, the first support frame is fixedly connected with the first box body and is positioned above the first box body, the first air cylinder is fixedly connected with the first support frame and is positioned in the first support frame, the first push rod is movably connected with the first air cylinder and is positioned below the first air cylinder, and the first filter plate is rotatably connected with the first push rod and is positioned below the first push rod and is positioned in the first box body;
the separation box comprises a second box body, a second support frame, a second cylinder, a second push rod, a second filter plate and a water outlet valve, the second box body is fixedly connected with the first box body and is positioned on one side of the first box body, the second support frame is fixedly connected with the second box body and is positioned on one side of the second box body far away from the first box body, a rectangular hole is formed in one side of the second box body close to the second support frame, the second cylinder is fixedly connected with the second support frame and is positioned above the second support frame, the second push rod is movably connected with the second cylinder and is positioned between the second cylinder and the second filter plate, the second push rod is fixedly connected with the second push rod and is positioned in the rectangular hole, a water outlet hole is formed in the bottom of the second box body, and the water outlet valve is fixedly connected with the box body, and is located inside the drain hole.
4. The apparatus of claim 3, wherein the separating means comprises a separating means for separating the used polarizer from the glass substrate,
the first filter plate comprises a plate body, a rotating shaft and a magnet block, the rotating shaft is movably connected with the first push rod and is located at the bottom of the first push rod, the plate body is fixedly connected with the rotating shaft and is located below the first push rod, and the magnet block is fixedly connected with the plate body and is located inside the plate body.
5. The apparatus of claim 4, wherein the separating means comprises a separating means for separating the used polarizer from the glass substrate,
the soaking box further comprises a metal block, wherein the metal block is fixedly connected with the first support frame, is positioned below the first support frame and is positioned above the magnet block.
6. The apparatus of claim 5, wherein the separating means comprises a separating means for separating the used polarizer from the glass substrate,
the soaking tank further comprises inclined plates, and the inclined plates are fixedly connected with the first tank body and the second tank body respectively and are positioned above the first tank body and the second tank body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110604442.7A CN113325616B (en) | 2021-05-31 | 2021-05-31 | Method and device for separating polaroid and glass substrate of waste liquid crystal display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110604442.7A CN113325616B (en) | 2021-05-31 | 2021-05-31 | Method and device for separating polaroid and glass substrate of waste liquid crystal display screen |
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| CN113325616B CN113325616B (en) | 2022-11-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274506A (en) * | 2008-05-20 | 2008-10-01 | 友达光电股份有限公司 | Removing device and removing method for polarizer |
| CN103191903A (en) * | 2013-04-11 | 2013-07-10 | 合肥工业大学 | Method for recycling waste LCD (liquid crystal display) panels |
| CN104793369A (en) * | 2015-04-27 | 2015-07-22 | 上海第二工业大学 | Equipment used for separating and recovering glass and polaroid of waste liquid crystal display |
| CN108405551A (en) * | 2018-02-02 | 2018-08-17 | 西南科技大学 | The method that waste LCD polaroid is detached with glass substrate |
-
2021
- 2021-05-31 CN CN202110604442.7A patent/CN113325616B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274506A (en) * | 2008-05-20 | 2008-10-01 | 友达光电股份有限公司 | Removing device and removing method for polarizer |
| CN103191903A (en) * | 2013-04-11 | 2013-07-10 | 合肥工业大学 | Method for recycling waste LCD (liquid crystal display) panels |
| CN104793369A (en) * | 2015-04-27 | 2015-07-22 | 上海第二工业大学 | Equipment used for separating and recovering glass and polaroid of waste liquid crystal display |
| CN108405551A (en) * | 2018-02-02 | 2018-08-17 | 西南科技大学 | The method that waste LCD polaroid is detached with glass substrate |
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