KR20020027690A - Recycle method and system of optical for color display tube - Google Patents

Abstract

PURPOSE: An apparatus and a method for removing an optical layer for color display tube are provided to enhance productivity by automating a process for removing an optical layer. CONSTITUTION: A loading portion(4) is used for loading an inferior vacuum tube(6). A clamp portion(20) is used for fixing the inferior vacuum tube(6). An etching portion(8) is used for removing an optical layer by spraying an etching solution on a surface of the transferred vacuum tube(6). The first rinse portion(10) is used for reducing density of the etching solution by spraying the first deionized water to the surface of the vacuum tube(6). The second rinse portion(12) is used for cleaning the surface of the vacuum tube(6) by spraying the second deionized water to the surface of the vacuum tube(6). The third rinse portion(14) is used for cleaning the surface of the vacuum tube(6) by spraying the third deionized water to the surface of the vacuum tube(6). A dry portion(16) is used for removing moisture from the vacuum tube(6). An unloading portion(18) is used for transferring the vacuum tube(6) by using a roller.

Description

Optical film removing device for color display tube and method thereof {RECYCLE METHOD AND SYSTEM OF OPTICAL FOR COLOR DISPLAY TUBE}

The present invention relates to an optical film removing device and method for color display tubes (hereinafter referred to as CDT or less), and more particularly, to improve productivity and yield by shortening the working time required for the optical film removing process. The present invention relates to a CDT optical film removing apparatus and method for reducing the number of workers by automation and reducing the defect rate during recoating due to recontamination, thereby improving performance.

In general, CDT coats an optical film on its surface to reduce light reflectance and electrostatic forces. This optical film is an ARAS (Anti Reflection Anti Static) film and is formed of ITO and SiO ₂ films. Varies.

Coating the optical film on the surface of the CDT is carried out as follows.

First, the CDT surface is polished to remove the foreign matter stuck to the CDT surface and first with the back. Then, in order to remove the organic foreign matter adhered to the CDT surface, the user wipes the CDT surface using a nonwoven fabric containing a chemical solution. The next process is a preheating operation, which takes about 3 to 50 minutes at a temperature of 40 ° C. to 150 ° C. to form a gel (GEL) film by solvent evaporation during coating.

Then, an optical film is coated on the CDT surface. At this time, the coating method includes a spin coating method, a spray coating method, a sputter coating method, etc., and a suitable method is selected according to the conditions.

When the optical film coating method is coated by spin coating or spray coating, the coating film is cured by heating at a temperature of 100 to 600 ° C. for 50 to 180 minutes. After this process is completed, the glossiness and surface resistance are tested.

When a foreign material is mixed during the coating process of the optical film formed by the above method or a defect occurs due to a defect factor such as inappropriate coating temperature, the optical film is etched and recycled.

The optical film recycling method by the prior art is as follows.

A vacuum tube in which a defect has occurred is set in a jig and fixed. Then, about 5-10 g of abrasive is apply | coated to the whole surface of a vacuum tube. Then, when the surface of the vacuum tube is brought into contact with the surface of the vacuum tube using an electric motor with a gloss pad attached thereto, the optical pad is removed while the gloss pad is rotated for 3 to 5 minutes at 500 to 1000 RPM. At this time, the abrasive coating and the operation of the electric mechanism is performed manually by the operator.

Then, the abrasive is sprayed on the surface of the vacuum tube to remove the abrasive. Then, the inspection is completed, such as glossiness and surface resistance.

However, since the optical film removing method according to the prior art as described above takes a long time for the optical film removing operation to 3 to 5 minutes, productivity and yield are lowered, and is performed by a skilled worker manually. When the work force is excessively necessary, and the abrasive is mixed in the T-band mounted for the purpose of preventing the damage of the electron tube during the operation, there is a problem in that the defect of the optical film is caused by the abrasive flowing out during the recoating operation.

In addition, there is a problem in that the cost is increased due to the additional cost of materials because it requires an abrasive and a polishing pad.

In addition, the vacuum tube before the coating process is subjected to the surface polishing process by the polishing sponge, whereby the abrasive causes corrosion of the T-band, and the abrasive flows into the gap between the T-band and the vacuum tube to introduce foreign substances during the recoating process. This causes a problem of lowering the price competitiveness of the product and a major cause of environmental pollution during disposal.

The present invention has been created to solve the above problems, the object of the present invention is to automate the entire process of optical film removal, the operation is convenient and can reduce the number of workers, can reduce the work time, productivity and yield It is to provide an optical film removal device and a method for the CDT which can improve the product competitiveness and quality by preventing the occurrence of re-contamination caused by the re-contamination caused by the conventional optical film removal abrasives to improve the product competitiveness and quality. .

1 is a block diagram of an optical film removing apparatus according to the present invention,

2 is a plan view of a clamp mechanism according to the present invention;

3 is an enlarged cross-sectional view of part A of FIG. 2,

4 is a cross-sectional view of an etching apparatus according to the present invention,

5 is a cross-sectional view of a first rinse mechanism according to the present invention;

6 is a cross-sectional view of a second rinse mechanism according to the present invention;

7 is an enlarged plan view of part 6B;

8 is a cross-sectional view of a third rinse mechanism according to the present invention;

9 is a plan view of a rotating mechanism according to the present invention;

10 is an enlarged view of a portion 9C;

11 is a cross-sectional view of the 10 D-D line,

12 is a cross-sectional view of the drying mechanism according to the present invention.

<Explanation of symbols for main parts of the drawings>

4: loading mechanism 6: vacuum tube

8: etching mechanism 10: first rinse mechanism

12: second rinse mechanism 14: third rinse mechanism

16: dry mechanism 18: unloading mechanism

The optical film removal device for CDT according to the present invention for realizing the above object has a loading mechanism for conveying a vacuum tube in which a defect has occurred, a clamp mechanism for fixing the conveyed vacuum tube, and a surface of the vacuum tube conveyed by the loading mechanism. An etching apparatus for spraying etching liquid to remove the optical film, a first rinse mechanism for neutralizing the concentration of the etching liquid by spraying primary pure water on the surface of the vacuum tube after the etching operation, and the second pure water on the surface of the vacuum tube after the first pure water injection is finished. A second rinse mechanism for spraying and cleaning, a third rinse mechanism for spraying the surface of the vacuum tube with a third temperature of a predetermined temperature after the second pure water injection is finished, and for warming the surface of the vacuum tube, and the third pure water spray After the completion of the drying mechanism to remove the pure water by injecting a high-pressure air to the surface of the vacuum tube, and the unloading mechanism conveyed by the roller after the drying process It is characterized by a flaw.

In addition, the CDT optical film removal method according to the above-described configuration includes a transfer step of transporting in a state seated on a clamp mechanism so that the front surface of the vacuum tube faces downward, and etching liquid on the surface of the vacuum tube transferred in the transfer step. An etching step of removing the optical film by rubbing, a neutralization step of neutralizing the etching liquid on the front surface of the vacuum tube after the etching step is finished, and a first cleaning step of cleaning the second surface of the vacuum tube after the neutralization step with second pure water. After the first cleaning step, the first cleaning step is completed, the front surface of the vacuum tube is cleaned with 3rd pure water, and the final cleaning process to wet the front surface of the vacuum tube, and the pure water on the vacuum tube after the final cleaning process is finished. Drying process to remove the pure water and, after the drying process is rotated 180 degrees so that the front of the vacuum tube is directed upward It is characterized by consisting of an unloading process that is transferred to the roller in a state seated on the pallet.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing an optical film removing apparatus according to the present invention.

Such an optical film removing device is a device for removing an optical film formed on the surface of a vacuum tube when a defect occurs in the vacuum tube due to foreign material inflow and coating abnormality during the process of forming the optical film in order to have the ARAS function in the CDT. A loading mechanism 4 for transporting the vacuum tube, a clamp mechanism 20 for fixing the vacuum tube, and an etching mechanism 8 for spraying etching liquid on the surface of the vacuum tube 6 transferred by the loading mechanism 4 to remove the optical film. And a first rinse mechanism 10 for neutralizing the concentration of the etching liquid by spraying the primary pure water on the surface of the vacuum tube 6 after the etching operation, and the secondary pure water on the surface of the vacuum tube 6 after the primary pure water injection is finished. Second rinse mechanism 12 for spraying and cleaning the second rinse mechanism and a third rinse mechanism for spraying the surface of the vacuum tube 6 with the third pure water at a predetermined temperature after the second pure water spray is finished to clean and wet the surface of the vacuum tube. 14) tertiary pure powder After the completion of the drying process, the high pressure air is sprayed on the surface of the vacuum tube 6 to remove the pure water from the vacuum tube 6, and the unloading mechanism 18 or the like transferred by the roller after the drying process. Is done.

The loading mechanism 4 has a transfer rod 24 installed horizontally on the upper side, and a plurality of transfer devices for movably mounted in the longitudinal direction of the transfer rod 24 to move the vacuum tube 6 in each process; It consists of a pallet 26 which transfers to the section which removes the optical film of the vacuum tube 6 which the defect generate | occur | produced.

When the loading mechanism 4 is transported by the roller in the state in which the front surface of the vacuum tube 6 is mounted on the manually operated pallet 26 so as to face upward, the first transfer machine 28 descends and the vacuum tube 6 is removed. In this state, the vacuum tube 6 is rotated 180 degrees in this state, and the front surface thereof is transferred downward.

Here, the pallet 26 has a structure that can be used in a mixed 17-inch, 19-inch vacuum tube, the case of 19-inch vacuum tube rotates the pallet 26 90 degrees so as to be easily seated in the manual loading mechanism and then seated After that, it is rotated back to its original position and transferred to the optical film removing process section.

2 is a plan view of a clamp mechanism according to the invention, and FIG. 3 is a partial side view of the clamp mechanism.

The clamp mechanism 20 includes a main body portion 32 in which a space into which a vacuum tube 6 is inserted is formed, a cylinder portion 34 mounted in four directions of the main body portion 32, and the cylinder portion ( A piston part 40 which is fitted in a linear movement so as to be linearly movable 34 and which fixes the T-band 36 fixed by the lug pin 38 to the front side vacuum tube 6, and the other side of the piston part 40. It is connected to consists of a working rod 42 for linearly moving the piston (40).

The clamp mechanism 20 pushes the piston part 40 while the operating rod 42 is linearly moved when the vacuum tube 6 is inserted into the main body part 32. Then, the piston 40 is fitted to the lug pin 38 protruding from the T-band 36 to fix the vacuum tube 6.

4 is a cross-sectional view of an etching apparatus according to the present invention.

The etching mechanism 8 includes a main body 44 whose upper side is opened so that the vacuum tube 6 is inserted, and a front surface of the vacuum tube 6 which is horizontally seated below the main body 44 and transferred by the loading mechanism. The sponge 46 in contact, the etchant injection nozzle 50 for injecting the etching solution for removing the optical film onto the sponge 46, and the support panel 48 positioned below the sponge 46 to seat the sponge 46 thereon. And a driving motor 52 which is connected to the lower side of the support panel 48 and installed at the lower end of the main body 44 so as to lift and lower the support panel 48.

Here, the sponge 46 is formed to be rounded at a predetermined angle in the same shape as the front surface of the vacuum tube 6 so as to be in close contact with the front surface of the vacuum tube 6.

When the vacuum tube is positioned above the main body 44 in a state where the vacuum tube is fixed to the clamp device 76 by the first transfer machine 28, the upper surface of the sponge 46 in the etching liquid injection nozzle 50 is provided. When the etching solution is sprayed onto the sponge 46 to absorb the etching solution, and then the driving motor 52 is driven, the support panel 48 is moved upward while the sponge 46 is in contact with the front surface of the vacuum tube 6. When the reciprocating line is moved to the left and right of the support panel 48 in the state, the sponge 46 absorbed by the etchant rubs the entire surface of the vacuum tube to remove the optical film.

5 is a cross-sectional view of the first rinse mechanism according to the present invention.

The first rinse mechanism 10 is installed at one side of the main body 60 and a main body 60 into which the vacuum tube 6 is inserted at an upper side of the etching apparatus 8, which is installed at a predetermined interval in the lateral direction. Primary pure water injection nozzles 62a and 62b for injecting primary pure water, sponge 64 for absorbing primary pure water injected from the primary pure water injection nozzles 62a and 62b, and the sponge 64 A support panel 66 on which the seat is mounted, a pressing rod 70 installed to move horizontally in a state of being in close contact with the upper surface of the sponge 64, and squeezing the sponge to squeeze out the remaining chemical solution, and the support panel 66. It consists of a drive motor 68 for lifting and swinging in the horizontal direction.

The first pure water injection nozzles 62a and 62b are mounted on the front and rear sides of the pressing rod 70, respectively.

In the first rinse mechanism 10, after the etching process is completed, the vacuum tube is transported by the second transfer machine 72 to be fixed to the clamp device, but before the vacuum tube 6 is fixed to the clamp device, the pressing rod 70 is fixed. The sponge 64 is squeezed and at the same time, the primary pure water is injected from the primary pure water injection nozzles 62a and 62b to drain the residual etching solution remaining in the sponge 64.

Then, when the vacuum tube 6 is fixed to the clamp device 74, the drive motor 68 is driven to raise and lower the support panel 66 to bring the sponge 64 in close contact with the front surface of the vacuum tube 6, and then the support panel. When the 66 is swung from side to side, the pure water absorbed by the sponge 64 is neutralized while wiping the entire surface of the vacuum tube 6.

Here, the pressing (70) rod is compressed by the cam 64 while moving in the same shape as the front surface of the vacuum tube (6).

6 is a cross-sectional view of a second rinse mechanism according to the present invention.

The second rinse mechanism 12 includes a main body 80 whose upper side is opened so that the vacuum tube 6 can be placed, a sponge roller 82 mounted to the main body 80 so as to be movable in a horizontal direction, and the sponge roller. The second pure water injection nozzle 84 is installed on one side of the 82 to inject secondary pure water onto the sponge roller 82, and is installed in close contact with the sponge roller 84 to rotate the sponge roller 84. It consists of a pressing rod 86 for pressing the sponge roller 84 while being rotated in the opposite direction.

As shown in FIG. 7, the sponge roller 82 is provided with a first adjusting bolt 94 at one side thereof to adjust the amount of contact between the sponge roller 82 and the surface of the vacuum tube 6, A second adjustment bolt 96 is installed on one side of 86 to adjust the amount of contact between the pressing rod 86 and the sponge roller 82.

The second rinse mechanism 12 is the second rinse mechanism when the vacuum tube 6 having been etched by the first rinse mechanism 10 is transferred by the third transfer device 88 and fixed to the clamp mechanism 90. When the pure water spray nozzle 84 sprays pure water and rotates the sponge roller 82, the sponge roller 82 is moved horizontally in the same curved shape as the front surface of the vacuum tube while the sponge roller 82 is in contact with the front surface of the vacuum tube by the cam. Perform the action.

At this time, the pressing rod 86 is rotated in a direction opposite to the rotation direction of the sponge roller 82 to compress the sponge roller 82 to drain the pure water is completed.

8 is a cross-sectional view of a third rinse mechanism according to the present invention.

The third rinse mechanism 14 includes a main body 100 having an upper side opened so that the vacuum tube 6 is placed on an upper side thereof, and a rotating mechanism which is positioned above the main body 100 to rotate the vacuum tube 6 in a fixed state. 106 and a third pure water injection nozzle 102 which is installed in a plurality of horizontally inside the main body 100 to inject the third pure water to the front of the vacuum tube 6, and the third pure water injection nozzle 102 And a supply pipe 104 for feeding the third pure water to the third pure water injection nozzle 102.

When the third rinse mechanism 14 is transported by the fourth transfer machine 130 and seated on the rotary mechanism 106, the third rinse mechanism 14 rotates the vacuum tube and rotates the third pure water injection nozzle 102. The third pure water is sprayed on the front surface of the vacuum tube 6 to perform a final cleaning operation.

At this time, the third pure water is a high pressure pure water of about 60 ℃ warmly wet the surface of the vacuum tube 6, the injected pure water is removed by the centrifugal force due to the rotation of the rotary mechanism 106.

As shown in FIG. 9, the rotary mechanism 106 linearly moves to a housing 110 having a space in which the T-band 36 of the vacuum tube is seated, and a guide groove 114 formed in the housing 110. A fixing member 112 interposed on one side of the fixing member 112 so as to be capable of being mounted to fix the T-band 36 of the vacuum tube, the cylinder 116 to linearly move the fixing member 112, and the fixing member 112. A fixing cylinder for stopping the rotation of the housing 110 is caught by the elastic member 118 for imparting an elastic force in the direction in which the 112 is advanced and the fixing pin 120 protruding from the upper surface of the housing 110 ( 122).

Here, the cylinder 116 is shown in Figure 10 and 11, the fixing member 112 at the end of the operation rod 132 of the cylinder to pull in the direction in which the locking of the fixing member 112 is released. The engaging portion 136 is formed to engage the engaging projection 134 protruding from the upper side of the. In addition, the stopper 138 is rotatably mounted to the locking protrusion 134 to prevent the fixing member 112 from being pushed back by the centrifugal force, and the stopper 138 is pushed to protrude from the housing 110. It is caught by the prevention pin 142.

The fixing cylinder 122 includes a cylinder portion 152 fixed to the housing 110, an operation rod 154 mounted on the cylinder portion 152 so as to be linearly movable, and an end of the operation rod 154. A part is connected by a hinge, one end is hinged to the housing 110, and the other end is composed of a link member 156 that is locked to the fixing pin 120.

Such a rotating mechanism moves the cylinder 116 when the cylinder 116 is operated to pull the fixing member 112 and the vacuum tube 6 is seated in the housing 110. Then, the fixing member is advanced by the elastic force of the elastic member 118 to fix the T-band 36, wherein the fixing member 118 of the vacuum tube (6) to prevent the sprayed pure water to flow out of the top Closed to the side

After the fixing member 112 is closed, operating the fixing cylinder 122 to retract the operating rod 154 to release the locking action from the fixing pin 120 to rotate the housing 110. Then, when the operation rod 154 is advanced again, the link member 156 is engaged with the fixing pin 120 to stop the rotation.

As shown in FIG. 12, the drying mechanism 18 includes a main body 172 whose upper side is opened so that the vacuum tube 6 is placed, and horizontally embedded in the main body 172 to supply high-pressure air to the vacuum tube 6. To rotate the air spray nozzle 174 spraying the front surface of the nozzle, the air pipe 176 supplying the high pressure air to the air spray nozzle 174, and the vacuum tube 6 located above the main body 172. It is composed of a rotating mechanism (170).

The rotating mechanism has the same structure as the rotating mechanism described above, and serves to rotate the vacuum tube when high pressure air is injected onto the front side of the vacuum tube.

Such a drying mechanism rotates the vacuum tube 6 in a state where the vacuum tube 6 is transferred by the fifth transfer machine 150 and seated on the rotary mechanism 170, and the high-pressure air in the air spray nozzle 174 is rotated. Spray to remove the remaining water in the front of the vacuum tube (6).

The unloading mechanism 18 is conveyed by the sixth transfer machine 180 after the drying process is completed, the vacuum tube 6, 180 degrees so that the front surface of the vacuum tube 6 is directed upward again in the downward direction. After rotation, it is placed on the pallet 182 and transferred to the roller.

When the vacuum tube conveyed by the unloading mechanism is transferred to the roller while seated on the pallet, the vacuum tube is introduced into the furnace which performs the heating action, dried by about 150 degrees by the heater, and then transferred to the coating process.

The operation of the optical film removing device according to the present invention thus made will be described below.

The vacuum tube 6 is conveyed to the etching apparatus 8 by the first transfer machine 28 in a state where the vacuum tube 6 is seated on the clamp mechanism so as to face downward on the front surface of the vacuum tube 6 by the loading mechanism 4.

The vacuum tube 6 thus transferred is subjected to a step of removing an optical film by rubbing an etchant on the surface of the vacuum tube.

That is, the optical film is removed by swinging the sponge 46 to the left and right while keeping the sponge 46 absorbed from the etching liquid injection nozzle 50 of the etching mechanism in close contact with the entire surface of the vacuum tube.

After such an etching process is completed, the vacuum tube is transferred by the second transfer machine 72 to neutralize the etching liquid which is buried on the entire surface of the vacuum tube 6.

That is, when the sponge 64 absorbed by the primary pure water is brought into close contact with the front surface of the vacuum tube 6, and the sponge 64 is swung from side to side, the front surface of the vacuum tube 6 absorbed by the sponge 64 is absorbed. Neutralize the etchant while wiping off.

After the neutralization process is completed, the vacuum tube is transferred by a third transfer machine to perform a primary cleaning process for cleaning the second surface of the vacuum tube with pure water.

That is, when the etching solution neutralization process is completed, the vacuum tube 6 is transferred. When the pure water is injected from the secondary pure water injection nozzle 84 and the sponge roller 82 is rotated, the sponge roller 82 is brought into contact with the front surface of the vacuum tube. The primary cleaning is performed while moving horizontally.

After the first cleaning process, the vacuum tube is transferred by the fourth transfer machine 130 to clean the front surface of the vacuum tube with the third pure water and to perform the process of wet the front surface of the vacuum tube.

That is, when the vacuum tube is transferred by the fourth transfer machine 130 and seated on the rotary mechanism 106, the vacuum tube 6 is rotated by the rotary mechanism 106 and the third pure water injection nozzle 102 simultaneously. Spray the 3rd pure water of about 60 ℃ on the front surface of the tube to perform the final cleaning and warm the front surface of the vacuum tube.

After the finish cleaning operation, the vacuum tube 6 is transferred by the fifth transfer machine 150 to perform a pure water removing process for removing the pure water on the vacuum tube 6.

That is, the vacuum tube 6 is rotated by the rotating mechanism and the high pressure air is injected from the air injection nozzle 174 to remove residual water remaining on the front surface of the vacuum tube 6.

After the pure water removal process, the vacuum tube 6 is transferred by the sixth transfer machine 180, rotated 180 degrees so that the front surface of the vacuum tube 6 faces upward, and then transferred to the roller in a state seated on a pallet. By about 150 degrees and then transferred to the coating process.

Therefore, the optical film removing apparatus and method for a CDT according to the present invention constructed and operated as described above are automatically made while the entire process of removing the optical film is carried by a plurality of transfer machines, thereby reducing the working time and reducing the working time. It can be shortened, thereby improving the productivity and yield, there is an advantage that can prevent product from re-introduced to improve product competitiveness and quality.

Claims (15)

A loading mechanism for conveying the defective vacuum tube, a clamp mechanism for fixing the conveyed vacuum tube, an etching mechanism for spraying etching liquid on the surface of the vacuum tube conveyed by the loading mechanism to remove the optical film, and a surface of the vacuum tube after the etching operation is completed. A first rinse mechanism that neutralizes the concentration of the etching solution by spraying primary pure water on the surface, a second rinse mechanism that sprays and cleans the second pure water on the surface of the vacuum tube after the first pure water injection is finished, and a vacuum tube after the second pure water injection is finished A third rinse mechanism for spraying a third temperature of a predetermined temperature on the surface of the surface to clean and wet the surface of the vacuum tube, and a dry to remove the pure water by spraying high pressure air on the surface of the vacuum tube after the third pure water injection is finished. And an unloading mechanism which is transported by the roller after the drying process. The method of claim 1, The loading mechanism is a CDT, characterized in that consisting of a transfer rod is installed horizontally on the upper side over the entire process line, and a plurality of transfer machine is mounted to be movable in the longitudinal direction of the transfer rod to move the vacuum tube in each process Optical film removal device. The method of claim 1, The clamp mechanism includes a main body portion in which a space into which a vacuum tube is inserted is formed, a cylinder portion mounted in four directions of the main body portion, and a lug fitted to the cylinder portion so as to be linearly movable, and formed in a T-band of the vacuum tube on the front side. CDM optical film removal device characterized in that made of a piston rod that is fixed to the pin and the operating rod connected to the other side of the piston portion 40 to move the piston portion linearly. The method of claim 1, The etching mechanism includes a sponge in which an upper side of the main body is opened to insert the vacuum tube, a sponge seated horizontally on the lower side of the main body, and a front surface of the vacuum tube conveyed by the loading mechanism, and an etching solution for removing an optical film on the sponge. Etching liquid injection nozzles to be sprayed, a support panel which is positioned below the sponge and the sponge is seated, and a drive installed at the bottom of the main body connected to the lower side of the support panel to lift and lower the support panel and to swing left and right CDT optical film removal device, characterized in that made of a motor. The method of claim 4, wherein The sponge is a CDT optical film removing device, characterized in that the rounded at a predetermined angle in the same shape as the front surface of the vacuum tube to be in close contact with the front surface of the vacuum tube. The method of claim 1, The first rinse mechanism includes a main body into which a vacuum tube is inserted and installed at a predetermined interval in the lateral direction of the etching apparatus, and a primary pure water injection nozzle installed on one side of the main body to spray primary pure water; The sponge is absorbed by the primary pure water injection nozzle, the support panel on which the sponge is seated, and is installed to move horizontally in close contact with the upper surface of the sponge to compress the sponge to retain the remaining chemical liquid. Squeezing the squeezing rod, the drive motor for lifting the support panel and swinging in the left and right directions, characterized in that the optical film removal device for a CDT. The method of claim 6, The pressing rod is driven by a cam is moved to the same shape as the front of the vacuum tube while the optical film removal device for CDT, characterized in that made to compress the sponge. The method of claim 1, The second rinse mechanism may be installed on a side of the first rinse mechanism, the main body being opened so that a vacuum tube is placed on the upper side, a sponge roller movably mounted to the main body in a horizontal direction, and installed on one side of the sponge roller. And a second pure water injection nozzle for spraying secondary pure water on the sponge roller, and a pressing rod for pressing the sponge roller while being installed in close contact with the sponge roller and rotating in a direction opposite to the rotation direction of the sponge roller. CDT optical film removal device. The method of claim 1, The third rinse mechanism is located in the lateral direction of the second rinse mechanism, the upper body is opened so that the vacuum tube is placed on the upper side, the rotary mechanism is located on the upper side of the main body to rotate in a fixed state, It is installed in a plurality of horizontally on the inside of the main body and the third pure water injection nozzle for injecting the third pure water to the front of the vacuum tube, the third pure water injection nozzle is connected to supply the third pure water to the third pure water injection nozzle CDT optical film removal device, characterized in that made of a pipe. The method of claim 1, The drying mechanism includes a main body having an upper side opened so that the vacuum tube is placed, an air spray nozzle which is horizontally embedded in the main body to inject high pressure air to the front surface of the vacuum tube, and an air pipe which supplies high pressure air to the air spray nozzle. And a rotating mechanism for rotating the vacuum tube located above the main body. The method according to claim 9 or 10, The rotating mechanism may include a housing having a space in which the T-band of the vacuum tube is seated and being rotated, a fixing member fixed to the guide groove formed in the housing to linearly fix the T-band of the vacuum tube, and a straight line of the fixing member. A cylinder for moving, an elastic member interposed on one side of the fixing member to impart an elastic force in a direction in which the fixing member advances, and a fixing cylinder that is stopped by a fixing pin protruding from an upper surface of the housing to stop rotation of the housing. CDT optical film removal device, characterized in that made. The method of claim 11, The cylinder removes the optical film for CDT, characterized in that the engaging portion which is engaged with the locking projection protruding on the upper side of the fixing member is formed at the end of the operating rod of the cylinder to pull in the direction in which the locking of the fixing member is released. Device. The method according to claim 11 or 12, The fixing member is a stopper is rotatably mounted to the locking projection to prevent being pushed back by the centrifugal force, the stopper is an optical film removal device for a CDT, characterized in that the stopper is made to be locked to the push pins protruding from the housing. The method of claim 11, The fixing cylinder includes a cylinder portion fixed to the housing, an actuating rod mounted on the cylinder portion so as to be linearly movable, an end portion of the actuating rod is hinged, and one end is hinged to the housing, and the other end is fixed. Optical film removal device for a CDT, characterized in that consisting of a link member that is locked to the pin. A conveying step of conveying the vacuum tube in a state seated in a clamp mechanism such that the front surface of the vacuum tube faces downward; An etching step of removing the optical film by rubbing the etching solution on the surface of the vacuum tube transferred in the transfer step; A neutralization step of neutralizing the etching solution on the entire surface of the vacuum tube after the etching step is finished; A first cleaning step of performing a first cleaning on the entire surface of the vacuum tube after the neutralization step with second pure water; After the first cleaning step is finished cleaning step of washing the front of the vacuum tube with a third pure water and warmly wet the front of the vacuum tube; A pure water removing step of removing the pure water on the vacuum tube after the finishing cleaning process is completed; After the pure water removal process is completed, the optical film removal method for a CDT, characterized in that the front of the vacuum tube is rotated 180 degrees and then unloading step of transporting to the roller in a state seated on the pallet.