Display screen etching apparatus and process with pressure filtration circulation and bubble etching control functions

Abstract

This invention discloses a display screen etching apparatus and process with pressure filtration circulation and bubble etching functions. The apparatus includes a lifting clamping mechanism, an etching tank, a bubble tube, a first sealing mechanism, and a rotating mechanism. The lifting clamping mechanism is used to clamp the display screen to be etched and to drive the glass substrate to move up and down. The etching tank is used to hold the etching solution. A first through groove corresponding to the glass substrate is opened on the bottom wall of the etching tank. The two ends of the bubble tube are rotatably connected to the bottom of the etching tank, and the bubble tube is located on both sides of the glass substrate. The first sealing mechanism is used to open and close the first through groove. The rotating mechanism is used to drive the bubble tube to rotate so that the air outlet on the bubble tube can emit air upward or toward the side of the glass substrate. The bubble tube of this invention can be better used for bubble etching and can also be used for drying the surface of the glass substrate. Therefore, the drying operation can be carried out directly in the etching tank without transferring to a drying device.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display manufacturing technology, specifically to a display etching apparatus and process with pressure filtration circulation and bubble etching control functions. Background Technology

[0002] Glass substrates are commonly used components in consumer electronics displays. Their manufacturing process typically includes an etching thinning step. During etching, to promote the flow of the etching solution and improve etching efficiency, a bubbling mechanism is usually installed at the bottom of the etching tank. This mechanism blows out a large number of bubbles, which, as they rise, propel the etching solution and increase its fluidity within the tank. Simultaneously, the repeated reactions of the etching solution generate a significant amount of glass powder.

[0003] Currently, existing glass substrate etching equipment has the following drawbacks in practical applications: (1) After the existing etching equipment completes the etching process on the glass substrate, the etched glass substrate needs to be transferred to a special cleaning tank for cleaning. After cleaning, it is then transferred to a drying equipment for drying. During the transfer process, the residual etching solution on the glass substrate is easy to drip onto the ground, which will cause pollution to the working environment. (2) In order to filter the waste liquid generated during the etching process, a plate and frame filter press is usually used. As a widely used wastewater filtration equipment, the plate and frame filter press has many advantages such as high filtration efficiency, strong processing capacity and stable operation. However, the plate and frame filter press requires shutdown to remove glass powder residue, which is inconvenient for glass powder residue discharge. Summary of the Invention

[0004] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a display screen etching device and process with pressure filtration circulation and bubble etching control functions.

[0005] According to a first aspect of the present invention, a display screen etching apparatus having pressure filtration circulation and bubbling controlled etching functions is provided, comprising: A lifting clamping mechanism is used to clamp the display screen to be etched and to move the glass substrate up and down. An etching tank is used to hold etching solution; a first through groove corresponding to the glass substrate is formed on the bottom wall of the etching tank. Bubble tubes are rotatably connected at both ends to the bottom of the etching tank, and the bubble tubes are respectively disposed on both sides of the glass substrate, with a number of air outlet holes spaced apart on the bubble tubes. A first blocking mechanism is used to open and close the first through channel; A rotating mechanism is used to drive the bubbling tube to rotate so that the air outlet on the bubbling tube can emit air upward or toward the side of the glass substrate. A filter press tank, which is used to receive the etching solution after etching the glass substrate; A clamping mechanism, comprising multiple first clamping plates and second clamping plates, is used to move the first clamping plates and second clamping plates closer to or further apart from each other. The third channel is located at the bottom of the filter press tank; The second sealing mechanism is used to open and close the third channel.

[0006] A further embodiment is that the first sealing mechanism includes a first blocking plate and a first cylinder. The bottom wall of the etching tank is provided with a first sliding groove that slides with the first blocking plate. The first blocking plate is provided with a plurality of second through grooves at intervals. The first cylinder is used to drive the first blocking plate to slide in the first sliding groove so that the second through grooves overlap or are offset from the first through grooves.

[0007] A further embodiment is that the rotating mechanism includes a third gear, which is installed at one end of the bubbling tube that passes through the etching tank. The third gears corresponding to the bubbling tubes on both sides of the glass substrate are respectively disposed on both sides of the etching tank, and one end of the bubbling tube is connected to the air inlet pipe through a rotary joint. The third gear is driven to rotate by a rack.

[0008] A further embodiment is that the third gear corresponding to the bubbling tube on one side of the glass substrate is directly meshed with the rack, and the third gear corresponding to the bubbling tube on the other side of the glass substrate is meshed with the rack through the fourth gear; the rack is connected to the first blocking plate through the connecting block, and a strip groove is provided on the etching groove for the connecting block to pass through.

[0009] A further embodiment is that the lifting and clamping mechanism includes electrically operated telescopic rods disposed on both sides of the etching tank. The output end of the electrically operated telescopic rods is connected to the mounting plate via a connecting rod. Several sliders, screws, and sliding rods are spaced apart between the two mounting plates. The screws pass through the sliders and are threadedly connected to them. The sliding rods pass through the sliders and are slidably engaged with them. A clamping plate is installed on the lower surface of the sliders. The sliders are arranged in pairs. The screws are driven to rotate by a motor so that the clamping plates clamp the glass substrate.

[0010] A further embodiment includes a pressing mechanism that further comprises second cylinders disposed on both sides of the filter press tank, and the output ends of the second cylinders on both sides of the filter press tank are respectively fixedly connected to a first fixing rod and a second fixing rod. The first pressing plate is mounted on the first fixing rod and slides in cooperation with the outer surface of the second fixing rod. The second pressing plate is mounted on the second fixing rod and slides in cooperation with the outer surface of the first fixing rod. A partition plate that slides in cooperation with the sides of the first pressing plate and the second pressing plate is also installed in the filter press tank, and a filter cloth is provided on the partition plate.

[0011] A further embodiment is that the second sealing mechanism includes a second blocking plate and a third cylinder. The bottom wall of the filter press tank is provided with a second sliding groove that slides with the second blocking plate. The second blocking plate is provided with a plurality of fourth through grooves at intervals. The third cylinder is used to drive the second blocking plate to slide in the second sliding groove so that the third through groove and the fourth through groove overlap or are staggered.

[0012] A further embodiment is that the second blocking plate is provided with several grooves spaced apart, and a movable plate is slidably fitted in the groove. The lower surface of the movable plate is connected to the bottom wall of the groove by a spring. The upper end of the movable plate is adapted to the third through groove, and one side of the upper end of the movable plate is set as an inclined surface. When the movable plate corresponds to the third through groove, the upper end of the movable plate is embedded into the upper end of the third through groove, so that the upper surface of the movable plate is flush with the bottom wall of the filter press tank.

[0013] According to a second aspect of the present invention, a liquid crystal display etching process with pressure filtration circulation and bubble etching control functions is provided, implemented by any of the above-described apparatus, comprising the following steps: The glass substrate to be etched is held by a lifting clamping mechanism and then immersed in the etching solution in the etching tank. Bubbles are expelled through the vent holes on the bubbling tube to achieve bubbling etching on the surface of the glass substrate. After etching is completed, the first channel is opened through the first sealing mechanism to drain the etching solution from the etching tank; The first channel is closed by the first sealing mechanism, and clean water is injected into the etching tank to clean the etched glass substrate. Then, the first channel is opened through the first sealing mechanism to discharge the waste liquid in the etching tank; The bubbling tube is rotated by a rotating mechanism, so that the air outlet on the bubbling tube changes from upward air outlet to air outlet towards the side of the glass substrate. The glass substrate is moved down by the lifting and clamping mechanism so that the air from the bubbling tube dries the side of the glass substrate. The etching solution after etching the glass substrate is collected in a pressure filter tank. The first and second pressing plates are moved closer or further apart by the pressing mechanism to achieve the pressure filtration operation of the etching solution; The third channel is opened by the second sealing mechanism so that the waste residue can be discharged through the third channel.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention uses the cooperation of the third gear, the fourth gear, the rack, the bubble tube, the connecting block and the first blocking plate to make the first through slot and the second through slot offset from each other, so that the air outlet on the bubble tube can vent upward; and when the first through slot and the second through slot overlap, the air outlet on the bubble tube on both sides of the glass substrate can be switched from venting upward to venting towards the side of the glass substrate; so that the air outlet on the bubble tube can vent upward and also vent towards the surface of the glass substrate; that is, the bubble tube can be better used for bubble etching and can also be used for drying the surface of the glass substrate; therefore, after completing the etching and cleaning operations of the glass substrate, the drying operation can be carried out directly in the etching tank without transferring to the drying equipment for drying; during the drying operation, since the first through slot and the second through slot overlap, the lifting clamping mechanism can drive the glass substrate to move down and pass through the first through slot, so as to facilitate the drying of the entire surface of the glass substrate from bottom to top, thereby realizing the rapid drying of the entire surface of the glass substrate. (2) The present invention sets multiple first pressing plates and second pressing plates in the filter press tank. The first pressing plates and second pressing plates are paired up and correspond to the conveying branch pipe. After the second cylinder is started, the second cylinder will drive multiple sets of first pressing plates and second pressing plates to perform filter press operation at the same time, thus having the advantages of high filtration efficiency and strong processing capacity. In addition, after the filter press is completed, after the second blocking plate is driven to move, the third channel and the fourth channel overlap, which makes it easy to discharge the glass powder between the first pressing plate and the second pressing plate from the filter press tank. Thus, the problem of inconvenient discharge of glass powder is solved.

[0015] (3) The present invention, through the cooperation of the movable plate, spring, second blocking plate and third through groove, so that when the movable plate corresponds to the third through groove, the upper end of the movable plate is embedded into the upper end of the third through groove, so that the upper surface of the movable plate is flush with the bottom wall of the filter press tank; in this way, the first pressing plate and the second pressing plate can perform a full filter press operation on the waste liquid containing glass powder slag; and there will be no situation where the waste liquid remaining in the third through groove is inconvenient to filter; at the same time, with the cooperation of the inclined surface at the upper end of the movable plate and the inner wall at the upper end of the third through groove, when the third cylinder drives the second blocking plate to move, it will squeeze the movable plate back into the groove, so that the movable plate will not hinder the movement of the second blocking plate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the display screen etching device with pressure filtration circulation and bubble etching control functions provided in the first embodiment of the present invention. Figure 2 Provided by the first embodiment of the present invention Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a cross-sectional three-dimensional structural diagram of the etching tank provided in the first embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the lifting clamping mechanism and the second sealing mechanism provided in the first embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the etching tank provided in the first embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the filter press tank provided in the first embodiment of the present invention; Figure 7 This is a cross-sectional perspective view of the filter press tank provided in the first embodiment of the present invention; Figure 8 Provided by the first embodiment of the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0017] Reference numerals: 1. Liquid storage tank; 2. Etching tank; 201. Electric telescopic rod; 202. Connecting rod; 203. Mounting plate; 204. Motor; 205. First gear; 206. Second gear; 207. Screw; 208. Slider; 209. Clamping plate; 210. Glass substrate; 211. Bubble tube; 212. First through groove; 213. First sliding groove; 214. First blocking plate; 215. Second through groove; 216. Third gear; 217. Fourth gear; 218. Rack; 219. Connecting block; 220. Strip groove; 221. 1. First cylinder; 222. Rotary joint; 223. Air inlet pipe; 224. Heating assembly; 3. Filter press tank; 301. Second cylinder; 302. First pressing plate; 303. Second pressing plate; 304. First fixing rod; 305. Second fixing rod; 306. Partition plate; 307. Filter cloth; 308. Second sliding groove; 309. Second blocking plate; 310. Third through groove; 311. Fourth through groove; 312. Groove; 313. Spring; 314. Movable plate; 315. Third cylinder; 4. Centrifugal pump; 5. Main conveying pipe; 6. Branch conveying pipe. Detailed Implementation

[0018] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Example 1 Please see Figure 1 This invention provides a display screen etching apparatus with pressure filtration circulation and bubble etching functions, including a storage tank 1, an etching tank 2, and a pressure filtration tank 3. The etching tank 2 contains etching solution for etching a glass substrate 210. The storage tank 1 is located directly below the etching tank 2. After the etching solution etches the glass substrate 210, the etching solution in the etching tank 2 is discharged into the storage tank 1. The storage tank 1 transfers the etching waste liquid to the pressure filtration tank 3 through a main conveying pipe 5. One end of the main conveying pipe 5 is connected to the storage tank 1, and the other end of the storage tank 1 is located directly above the pressure filtration tank 3. To facilitate the transport of the etching waste liquid, a centrifugal pump 4 is installed on the main conveying pipe 5.

[0021] Please see Figures 3-5 The etching tank 2 is equipped with a lifting clamping mechanism, which is used to clamp the glass substrate 210 to be etched and to drive the glass substrate 210 to move up and down. Specifically, the lifting clamping mechanism includes electric telescopic rods 201 installed on both sides of the etching tank 2. The output end of the electric telescopic rods 201 is connected to the mounting plate 203 through a connecting rod 202. Two mounting plates 203 are disposed inside the etching tank 2. Several sliders 208, screws 207 and sliding rods are spaced apart between the two mounting plates 203. The screws 207 pass through the sliders 208 and are threadedly connected to them. The sliding rods pass through the sliders 208 and are slidably engaged with them. The two ends of the screws 207 are rotatably connected to the mounting plates 203, and the two ends of the sliding rods are fixedly connected to the mounting plates 203. The screws 207 are driven to rotate by a motor 204. A clamping plate 209 is installed on the lower surface of the sliders 208. Preferably, the surface of the clamping plate 209 is provided with fluororubber or butyl rubber. The sliders 208 are arranged in pairs, and the threaded holes on each pair of sliders 208 have opposite spiral directions. When the motor 204 drives the screw 207 to rotate, the screw 207 will cause the two clamping plates 209 corresponding to each pair of sliders 208 to move closer or further apart, thereby facilitating the clamping plates 209 to clamp the glass substrate 210.

[0022] It should be noted that the substrate holder containing multiple glass substrates 210 can be placed directly below the lifting clamping mechanism in advance, with the upper end of each glass substrate 210 positioned between two clamping plates 209; once the clamping plates 209 clamp the upper end of the glass substrate 210, the substrate holder can be removed; then the glass substrate 210 is moved downwards by the electric telescopic rod 201 and immersed in the etching solution.

[0023] To enable the motor 204 to drive the screw 207 to rotate, for example, the motor 204 is mounted on one of the mounting plates 203, and the output end of the motor 204 is fixedly connected to a first gear 205. The first gear 205 is meshed with a second gear 206, and the second gear 206 is mounted on the screw 207.

[0024] Several bubble tubes 211 are installed inside the etching tank 2. The two ends of each bubble tube 211 are rotatably connected to the bottom of the etching tank 2, and the bubble tubes 211 are arranged in pairs on both sides of the bottom of each glass substrate 210. Several air vents are spaced apart on each bubble tube 211. By blowing out a large number of bubbles through the bubble tubes 211, the bubbles propel the etching solution as they rise, increasing the fluidity of the etching solution within the etching tank 2 and improving the etching effect.

[0025] The bottom wall of the etching tank 2 has a first through groove 212 corresponding to the glass substrate 210, and the first through groove 212 is located directly below the glass substrate 210. The bottom of the etching tank 2 is also provided with a first sealing mechanism, which is used to open and close the first through groove 212. When the first through groove 212 is opened, the etching solution in the etching tank 2 can be discharged, and the bottom end of the glass substrate 210 can pass through the first through groove 212, so that the upper end of the glass substrate 210 moves down to below the bubble tube 211.

[0026] For example, the first sealing mechanism includes a first blocking plate 214 and a first cylinder 221, with the first cylinder 221 mounted on the outer wall of the etching tank 2. A first sliding groove 213 is formed on the bottom wall of the etching tank 2, which slides in conjunction with the first blocking plate 214. Preferably, fluororubber or butyl rubber is provided at the contact point between the first blocking plate 214 and the first sliding groove 213. A plurality of second through grooves 215 are spaced apart on the first blocking plate 214. The output end of the first cylinder 221 is connected to one side of the first blocking plate 214. By controlling the extension and retraction of the output end of the first cylinder 221, the first blocking plate 214 is driven to slide within the first sliding groove 213, so that the second through grooves 215 overlap or stagger with the first through grooves 212, thereby opening and closing the first through groove 212.

[0027] It should be noted that after the glass substrate 210 is etched, after opening the first channel 212 and draining the waste liquid in the etching tank 2 into the storage tank 1, the first channel 212 can be closed again; at this time, clean water is injected into the etching tank 2, and a large number of bubbles are blown out through the bubble tube 211 to facilitate cleaning of the etched glass substrate 210.

[0028] To enable the drying operation of the etched and cleaned glass substrate 210, this invention includes a rotating mechanism. This mechanism drives the bubbling tube 211 to rotate, causing the air outlet on the bubbling tube 211 to switch from upward airflow to airflow towards the side of the glass substrate 210. Furthermore, during the drying process, the first through slot 212 is opened, and the lifting clamping mechanism moves the glass substrate 210 downward through the first through slot 212, facilitating drying of the entire surface of the glass substrate 210 from bottom to top, thereby achieving rapid drying of the entire surface of the glass substrate 210.

[0029] Preferably, the bubbling tube 211 located in the etching tank 2 is in the shape of a "Z"; thus, when the vent on the bubbling tube 211 emits air upward, the middle part of the bubbling tube 211 is close to the surface of the glass substrate 210; when the vent on the bubbling tube 211 emits air towards the surface of the glass substrate 210, the distance between the bubbling tube 211 and the glass substrate 210 is sufficient for the clamping plate 209 to pass through.

[0030] For details, please refer to Figure 1-2 and Figures 4-5The rotating mechanism includes a third gear 216, which is installed at one end of the bubbling tube 211 that passes through the etching tank 2. The third gears 216 corresponding to the bubbling tubes 211 on both sides of the glass substrate 210 are respectively located on both sides of the etching tank 2, and one end of the bubbling tube 211 is connected to the air inlet pipe 223 via a rotary joint 222. The third gear 216 is driven to rotate by a rack 218, and the air inlet pipe 223 is connected to an external blower. The third gear 216 corresponding to the bubbling tube 211 on one side of the glass substrate 210 is directly meshed with the rack 218, while the third gear 216 corresponding to the bubbling tube 211 on the other side of the glass substrate 210 is meshed with the rack 218 via a fourth gear 217. The rack 218 is connected to the first blocking plate 214 via a connecting block 219, and a strip groove 220 is provided on the etching tank 2 for the connecting block 219 to pass through. Therefore, when the first channel 212 and the second channel 215 are offset from each other, the air outlet on the bubble tube 211 emits air upwards; after the first cylinder 221 drives the first blocking plate 214 to move, the first channel 212 and the second channel 215 overlap, and the air outlet on the bubble tube 211 on both sides of the glass substrate 210 is automatically switched from emitting air upwards to emitting air towards the side of the glass substrate 210; thus ensuring that when the first channel 212 is opened and the drying operation is performed, the air outlet on the bubble tube 211 automatically emits air towards the side of the glass substrate 210, and when the first channel 212 is closed and the etching and cleaning operations are performed, the air outlet on the bubble tube 211 automatically emits air upwards.

[0031] Preferably, a heating element 224 is provided on the air inlet pipe 223, and a heating tube is provided inside the heating element 224. When the air outlet on the bubbling pipe 211 discharges air towards the side of the glass substrate 210, the heating tube inside the heating element 224 is turned on simultaneously, which helps to improve the drying efficiency.

[0032] Please see Figure 1 The storage tank 1 is equipped with a drain pipe and a valve. One end of the storage tank 1 is connected to the main conveying pipe 5. The other end of the main conveying pipe 5 extends directly above the filter press 3, and several branch conveying pipes 6 are installed at intervals along the main conveying pipe 5. Since the storage tank 1 is located directly below the etching tank 2, the waste liquid after etching and cleaning can be discharged into the storage tank 1. Starting the centrifugal pump 4 on the main conveying pipe 5 allows the etching solution containing glass powder to be transported to the filter press 3 by the conveying action of the main conveying pipe 5 and the branch conveying pipes 6. Opening the valve on the drain pipe allows the waste liquid after cleaning to be discharged into the storage tank 1.

[0033] Please see Figures 6-8The filter press trough 3 is equipped with a pressing mechanism, which includes multiple first pressing plates 302 and second pressing plates 303. The first pressing plates 302 and second pressing plates 303 are arranged in pairs, corresponding to the conveying branch pipe 6. The pressing mechanism is used to move the first pressing plates 302 and second pressing plates 303 closer to or further apart from each other. The pressing mechanism also includes second cylinders 301 located on both sides of the filter press trough 3. The output ends of the second cylinders 301 located on both sides of the filter press trough 3 are respectively fixedly connected to a first fixing rod 304 and a second fixing rod 305. The first pressing plate 302 is mounted on the first fixing rod 304 and slides in cooperation with the outer surface of the second fixing rod 305. The second pressing plate 303 is mounted on the second fixing rod 305 and slides in cooperation with the outer surface of the first fixing rod 304. In addition, two partitions 306 are installed inside the filter press 3, which slide and engage with the sides of the first pressing plate 302 and the second pressing plate 303. Filter cloth 307 is provided on the partitions 306. When the conveying pipe 6 conveys the waste liquid containing glass powder slag between the first pressing plate 302 and the second pressing plate 303, the second cylinder 301 is activated. The second cylinder 301 drives the first pressing plate 302 and the second pressing plate 303 to move closer together, thereby achieving pressure filtration of the conveyed waste liquid containing glass powder slag. The solution in the waste liquid is discharged through the filter cloth 307 on the partitions 306, and the glass powder slag in the waste liquid remains between the first pressing plate 302 and the second pressing plate 303. Since the first pressing plate 302 and the second pressing plate 303 are arranged in pairs, and multiple sets are provided, it has the advantages of high filtration efficiency and strong processing capacity.

[0034] It should be noted that a drain pipe is also provided on the filter press 3, and a valve is provided on the drain pipe; the drain pipe is used to discharge the waste liquid that passes through the baffle 306 into the filter press 3, so as to realize the recycling of waste liquid.

[0035] The bottom wall of the filter press 3 is provided with several third through grooves 310. A second sealing mechanism is provided at the bottom of the filter press 3, which is used to open and close the third through grooves 310. Specifically, the second sealing mechanism includes a second blocking plate 309 and a third cylinder 315. Fluororubber or butyl rubber is provided at the contact point between the second blocking plate 309 and the third through groove 310. The bottom wall of the filter press 3 is provided with a second sliding groove 308 that slides with the second blocking plate 309. Several fourth through grooves 311 are spaced apart on the second blocking plate 309. The third cylinder 315 is installed on the side wall of the filter press 3. The output end of the third cylinder 315 is connected to one end of the second blocking plate 309. The third cylinder 315 drives the second blocking plate 309 to slide in the second sliding groove 308, so that the third through grooves 310 and the fourth through grooves 311 overlap or stagger. When the third channel 310 and the fourth channel 311 overlap, it is convenient to discharge the glass powder residue between the first pressing plate 302 and the second pressing plate 303 into the filter press 3; when the third channel 310 and the fourth channel 311 are staggered, it is convenient for the first pressing plate 302 and the second pressing plate 303 to perform filter press operation on the waste liquid containing glass powder residue.

[0036] It should be noted that, because the second blocking plate 309 slides within the second sliding groove 308, causing the third through groove 310 and the fourth through groove 311 to be misaligned, the second blocking plate 309 will not be flush with the bottom wall of the filter press 3. Therefore, during the filter press operation of the first pressing plate 302 and the second pressing plate 303 on the waste liquid containing glass powder, it will be inconvenient to filter the waste liquid remaining in the upper part of the third through groove 310, thus hindering the full filter press operation of the waste liquid containing glass powder.

[0037] To this end, the present invention provides a plurality of grooves 312 spaced apart on the second blocking plate 309. Movable plates 314 are slidably fitted within the grooves 312, and fluororubber or butyl rubber is also provided at the contact points between the movable plates 314 and the grooves. The lower surface of the movable plates 314 is connected to the bottom wall of the grooves 312 via springs 313, which are spaced apart along the length and / or width of the movable plates 314. The upper end of the movable plates 314 is adapted to the third through groove 310, and one side of the upper end of the movable plates 314 is set as an inclined surface. When the movable plates 314 correspond to the third through groove 310, the upper end of the movable plates 314 is embedded into the upper end of the third through groove 310, so that the upper surface of the movable plates 314 is flush with the bottom wall of the filter press 3. In this way, the first pressing plate 302 and the second pressing plate 303 can perform sufficient pressure filtration of the waste liquid containing glass powder slag, without leaving any waste liquid residue in the third through groove 310. In order to achieve the mutual offset between the third through groove 310 and the fourth through groove 311, when the third cylinder 315 drives the second blocking plate 309 to move, the inclined surface at the upper end of the movable plate 314 cooperates with the inner wall at the upper end of the third through groove 310 to retract the movable plate 314 into the groove 312, so that the movable plate 314 will not hinder the movement of the second blocking plate 309.

[0038] Example 2 This invention provides an etching process for liquid crystal displays with pressure filtration circulation and bubble etching control functions, implemented by the apparatus described in Example 1, and includes the following steps: The glass substrate 210 to be etched is held by the lifting clamping mechanism and immersed in the etching solution of the etching tank 2. Bubbles are expelled through the vent holes on the bubbling tube 211 to achieve bubbling etching on the surface of the glass substrate 210. After etching is completed, the first channel 212 is opened by the first sealing mechanism to drain the etching solution in the etching tank 2. Since the storage tank 1 is located directly below the etching tank 2, after the first passage 212 is opened, the etching waste liquid in the etching tank 2 will be discharged into the storage tank 1; then, under the action of the centrifugal pump 4, the etching waste liquid will be transported to the filter press 3 through the main conveying pipe 5 and the branch conveying pipe 6.

[0039] The first channel 212 is closed by the first sealing mechanism, and clean water is injected into the etching tank 2 to clean the etched glass substrate 210. During the cleaning process, air bubbles are simultaneously discharged through the air outlet on the bubbling tube 211, increasing the fluidity of the water in the etching tank and improving the cleaning effect.

[0040] Then, the first channel 212 is opened through the first sealing mechanism to discharge the waste liquid in the etching tank 2; The bubbling tube 211 is rotated by a rotating mechanism, so that the air outlet on the bubbling tube 211 is changed from upward air outlet to air outlet towards the side of the glass substrate 210. As described above, the rotating mechanism includes a third gear 216, a fourth gear 217, and a rack 218. The rack 218 is connected to the first blocking plate 214 via a connecting block 219. After the first cylinder 221 moves the first blocking plate 214, it can either cause the first through groove 212 and the second through groove 215 to overlap or separate, and it can also cause the rack 218 to move back and forth, thereby driving the third gear 216 to rotate. When the first through groove 212 and the second through groove 215 overlap, the air outlets on the bubble tubes 211 on both sides of the glass substrate 210 will automatically switch from upward airflow to airflow towards the side of the glass substrate 210. This ensures that when the first through groove 212 is opened and the drying operation is performed, the air outlets on the bubble tubes 211 will automatically airflow towards the side of the glass substrate 210, and when the first through groove 212 is closed and the etching and cleaning operations are performed, the air outlets on the bubble tubes 211 will automatically airflow upward.

[0041] The glass substrate 210 is moved down by the lifting clamping mechanism so that the air vented from the bubbling tube 211 dries the entire side of the glass substrate 210. The etching solution after etching the glass substrate 210 is collected by the pressure filter tank 3; The pressing mechanism drives the first pressing plate 302 and the second pressing plate 303 to move closer or further apart, thereby achieving the pressure filtration operation of the etching solution. The third channel 310 is opened by the second sealing mechanism so that the waste residue can be discharged through the third channel 310.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0043] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0044] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A display screen etching apparatus with pressure filtration circulation and bubble etching control functions, characterized in that, include: A lifting clamping mechanism is used to clamp the glass substrate (210) to be etched and to drive the glass substrate (210) to move up and down. Etching tank (2), the etching tank (2) is used to hold etching solution; the bottom wall of the etching tank (2) is provided with a first through groove (212) corresponding to the glass substrate (210); Bubble tube (211), the two ends of the bubble tube (211) are rotatably connected to the bottom of the etching tank (2), and the bubble tube (211) is disposed on both sides of the glass substrate (210), and a number of air outlet holes are provided on the bubble tube (211) at intervals. The first blocking mechanism is used to open and close the first through channel (212). A rotating mechanism is used to drive the bubbling tube (211) to rotate so that the air outlet on the bubbling tube (211) can emit air upward or toward the side of the glass substrate (210); The filter press (3) is used to receive the etching solution after etching the glass substrate (210); The clamping mechanism includes multiple first clamping plates (302) and second clamping plates (303), and the clamping mechanism is used to drive the first clamping plates (302) and the second clamping plates (303) to move closer to or further apart from each other; The third channel (310) is disposed at the bottom of the filter press (3); The second sealing mechanism is used to open and close the third channel (310).

2. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 1, characterized in that: The first sealing mechanism includes a first blocking plate (214) and a first cylinder (221). The bottom wall of the etching tank (2) is provided with a first sliding groove (213) that slides with the first blocking plate (214). The first blocking plate (214) is provided with a plurality of second through grooves (215) spaced apart. The first cylinder (221) The first blocking plate (214) is used to slide within the first groove (213) so that the second through groove (215) overlaps or is offset from the first through groove (212).

3. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 2, characterized in that: The rotating mechanism includes a third gear (216), which is installed at one end of the bubbling tube (211) that passes through the etching groove (2). The third gears (216) corresponding to the bubbling tubes (211) on both sides of the glass substrate (210) are respectively located on both sides of the etching groove (2), and one end of the bubbling tube (211) is connected to the air inlet pipe (223) through a rotary joint (222). The third gear (216) is driven to rotate by a rack (218).

4. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 3, characterized in that: The third gear (216) corresponding to the bubbling tube (211) located on one side of the glass substrate (210) is directly meshed with the rack (218), and the third gear (216) corresponding to the bubbling tube (211) located on the other side of the glass substrate (210) is meshed with the rack (218) through the fourth gear (217); the rack (218) is connected to the first blocking plate (214) through the connecting block (219), and the etching groove (2) is provided with a strip groove (220) for the connecting block (219) to pass through.

5. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 1, characterized in that: The lifting and clamping mechanism includes an electric telescopic rod (201) disposed on both sides of the etching groove (2). The output end of the electric telescopic rod (201) is connected to the mounting plate (203) through a connecting rod (202). Several sliders (208), screws (207) and sliding rods are disposed at intervals between the two mounting plates (203). The screws (207) pass through the sliders (208) and are threadedly connected to them. The sliding rods pass through the sliders (208) and slide with them. A clamping plate (209) is installed on the lower surface of the sliders (208). The sliders (208) are arranged in pairs. The screws (207) are driven to rotate by a motor (204) so ​​that the clamping plate (209) clamps the glass substrate (210).

6. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 1, characterized in that: The pressing mechanism also includes a second cylinder (301) disposed on both sides of the filter press (3), and the output ends of the second cylinder (301) on both sides of the filter press (3) are respectively fixedly connected to a first fixed rod (304) and a second fixed rod (305). The first pressing plate (302) is installed on the first fixed rod (304) and slides with the outer surface of the second fixed rod (305). The second pressing plate (303) is installed on the second fixed rod (305) and slides with the outer surface of the first fixed rod (304). A partition (306) that slides with the sides of the first pressing plate (302) and the second pressing plate (303) is also installed in the filter press (3). A filter cloth (307) is provided on the partition (306).

7. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 1, characterized in that: The second sealing mechanism includes a second blocking plate (309) and a third cylinder (315). The bottom wall of the filter press (3) is provided with a second sliding groove (308) that slides with the second blocking plate (309). A plurality of fourth through grooves (311) are spaced apart on the second blocking plate (309). The third cylinder (315) is used to drive the second blocking plate (309) to slide in the second sliding groove (308) so that the third through groove (310) and the fourth through groove (311) overlap or stagger each other.

8. The display screen etching apparatus with pressure filtration circulation and bubble etching control functions according to claim 7, characterized in that: The second blocking plate (309) is provided with a plurality of grooves (312) spaced apart. A movable plate (314) is slidably fitted in the groove (312). The lower surface of the movable plate (314) is connected to the bottom wall of the groove (312) by a spring (313). The upper end of the movable plate (314) is adapted to the third through groove (310), and one side of the upper end of the movable plate (314) is set as an inclined surface. When the movable plate (314) corresponds to the third through groove (310), the upper end of the movable plate (314) is embedded into the upper end of the third through groove (310) so that the upper surface of the movable plate (314) is flush with the bottom wall of the filter press (3).

9. An etching process for liquid crystal displays with pressure filtration circulation and bubble etching control functions, characterized in that, Implemented by the apparatus according to any one of claims 1-8, comprising the following steps: The glass substrate (210) to be etched is held by the lifting clamping mechanism and immersed in the etching solution of the etching tank (2); Bubbles are expelled through the vent holes on the bubbling tube (211) to achieve bubbling etching on the surface of the glass substrate (210); After etching is completed, the first channel (212) is opened by the first sealing mechanism to discharge the etching solution in the etching tank (2); The first through groove (212) is closed by the first sealing mechanism, and clean water is injected into the etching tank (2) to clean the etched glass substrate (210); Then, the first channel (212) is opened by the first sealing mechanism to discharge the waste liquid in the etching tank (2); The bubbling tube (211) is rotated by a rotating mechanism so that the air outlet on the bubbling tube (211) is changed from upward air outlet to air outlet towards the side of the glass substrate (210); The glass substrate (210) is moved down by the lifting clamping mechanism so that the air outlet of the bubbling tube (211) dries the side of the glass substrate (210). The etching solution after etching the glass substrate (210) is received by the pressure filter tank (3); The pressing mechanism drives the first pressing plate (302) and the second pressing plate (303) to move closer or further apart to achieve the pressure filtration operation of the etching solution; The third channel (310) is opened by the second sealing mechanism so that the waste residue can be discharged through the third channel (310).

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