Liquid crystal coating equipment and coating process

Abstract

The invention discloses liquid crystal coating equipment and a coating process, and relates to the technical field of coating equipment.The liquid crystal coating equipment comprises a workbench, a U-shaped frame is movably arranged on the upper end face of the workbench, two ink jet type coating heads are symmetrically fixed to one side of the U-shaped frame, and a plurality of coating nozzles are arranged on the lower end face of each ink jet type coating head; a first liquid supply hose is arranged on the upper end face of each ink jet type coating head in a communicating mode, the other end of each first liquid supply hose is communicated with an external first liquid supply assembly, a plurality of conveying rollers are rotationally arranged on the upper end face of the workbench, two side edge positioning plates are symmetrically fixed to the upper end face of the workbench, and a tail end positioning plate is fixed to the upper end face of the workbench. An auxiliary positioning assembly is further arranged on the workbench, and a first translation mechanism used in cooperation with the U-shaped frame is arranged on the workbench. By arranging the ink-jet coating head, a row of fine liquid crystals can be sprayed each time, the coating efficiency is high, and the uniformity is good.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and in particular to a liquid crystal coating equipment and coating process. Background Technology

[0002] The LCD panel is the material that determines the brightness, contrast, color, and viewing angle of an LCD monitor. The LCD panel directly affects the price of the LCD monitor, and the quality and technology of the LCD panel are related to the overall performance of the LCD monitor. The manufacturing of LCD panels mainly includes array process, color filter process, panel forming process, module assembly process, and auxiliary processes.

[0003] In the panel forming process, it is necessary to complete the alignment and bonding of TFT glass substrate and CF glass substrate, liquid crystal coating, frame adhesive coating and curing. Existing liquid crystal coating equipment usually uses a syringe to drop liquid onto the glass substrate, and then relies on liquid crystal diffusion to fill the area. Since the syringe can only spray one liquid crystal dot at a time, the spraying efficiency is low, the uniformity of the liquid crystal mainly depends on diffusion, which takes a long time and the effect is not good. Summary of the Invention

[0004] This invention provides a liquid crystal coating equipment and coating process, which can solve the problem in the prior art: existing devices usually use a syringe to spray liquid crystal, resulting in low spraying efficiency.

[0005] A liquid crystal coating device includes a worktable. A U-shaped frame is movably mounted on the upper surface of the worktable. Two inkjet coating heads are symmetrically fixed on one side of the U-shaped frame. Multiple coating nozzles are mounted on the lower surface of each inkjet coating head. A liquid supply hose is connected to the upper surface of each inkjet coating head. The other end of the liquid supply hose is connected to an external liquid supply assembly. Multiple conveying rollers are rotatably mounted on the upper surface of the worktable. Two side positioning plates are symmetrically fixed on the upper surface of the worktable. An end positioning plate is fixed on the upper surface of the worktable. An auxiliary positioning assembly is also mounted on the worktable. A translation mechanism that works with the U-shaped frame is also mounted on the worktable.

[0006] As a further technical solution of the present invention, the translation mechanism includes two sliding grooves opened on the upper surface of the worktable, each sliding groove having a sliding seat slidably disposed therein, the sliding seat being fixedly connected to the lower end face of the U-shaped frame, and each sliding groove having a lead screw rotatably disposed on the inner wall of the sliding groove, the lead screw threaded through the corresponding sliding seat, and a working motor cooperating with the lead screw rotatably disposed inside the worktable.

[0007] As a further technical solution of the present invention, the auxiliary positioning component includes a translation groove opened on the upper surface of the worktable, a translation seat slidably arranged in the translation groove, a lifting groove first opened on the upper surface of the translation seat, a lifting plate first movably arranged in the lifting groove first, a plurality of pairs of mounting plates first symmetrically fixed on the upper surface of the lifting plate first, a contact wheel rotatably arranged on each pair of mounting plates first, a plurality of electric push rods first fixed on the inner bottom of the lifting groove first, the end of the telescopic end of the electric push rod first being fixedly connected to the lower surface of the lifting plate first, and a translation mechanism second used in conjunction with the translation seat is provided on the worktable.

[0008] As a further technical solution of the present invention, the translation mechanism 2 includes multiple electric push rods 2, multiple side grooves are provided on the inner wall of the translation groove, the electric push rods 2 are fixed in the side grooves, the end of the telescopic end of the electric push rods 2 is fixedly connected to the translation seat, guide sliders are fixed on both sides of the translation seat, two guide grooves are symmetrically provided on the inner wall of the translation groove, and the guide sliders are slidably disposed in the guide grooves.

[0009] As a further technical solution of the present invention, the upper surface of the workbench is provided with a plurality of lifting slots II, and a lifting plate II is movably arranged in each lifting slot II. Two mounting plates II are symmetrically fixed on the upper surface of each lifting plate II. A sponge wiping roller is rotatably arranged on each pair of mounting plates II. A working motor II for use with the sponge wiping roller is fixed on the side wall of the mounting plate II. A plurality of auxiliary cleaning components for use with the corresponding sponge wiping roller are provided on the workbench. A lifting unit for use with the lifting plate II is provided in the lifting slot II.

[0010] As a further technical solution of the present invention, each of the auxiliary cleaning components includes a base fixed to the upper surface of the workbench, a collection groove is provided on the upper surface of the base, a support frame is fixed to the bottom of the collection groove, a scraper is fixed to the upper surface of the support frame at an inclination, and a drain pipe communicating with the collection groove is provided through the base.

[0011] As a further technical solution of the present invention, each scraper is fixed with a connecting plate on both sides, a scraper second is movably arranged between the two connecting plates, a lead screw second is rotatably arranged between the two connecting plates, the lead screw second threaded through the scraper second, a working motor third for cooperating with the rotation of the lead screw second is fixed on the side wall of one of the connecting plates, and two guide rods are fixed between the two connecting plates, each guide rod movably passing through the scraper second.

[0012] As a further technical solution of the present invention, each of the scraper blades II has an arc-shaped notch on its upper end face, a spray head is fixed in the arc-shaped notch, a left nozzle and a right nozzle are connected to the outer surface of the spray head, a left solenoid valve and a right solenoid valve are provided inside the spray head, a liquid supply hose II is connected to the spray head, and the other end of the liquid supply hose II is connected to the external liquid supply component II.

[0013] As a further technical solution of the present invention, each of the scraper blades is fixed with a vertical plate on its upper end face, a horizontal plate is fixed with the upper end face of the vertical plate, two suspension ropes are symmetrically fixed with the lower end face of the horizontal plate, a small ball is fixed with the lower end face of each suspension rope, a contact switch for use with the small ball is fixed with both sides of the vertical plate, and a control box for use with the contact switch is provided on the workbench.

[0014] A liquid crystal coating process, the specific steps of which are as follows: Step 1: Place the glass substrate to be processed onto the conveyor roller. Then the conveyor roller rotates, causing the glass substrate to move towards the end positioning plate while adhering to the inner walls of the two side positioning plates, until one side of the glass substrate contacts the side wall of the end positioning plate. Then the auxiliary positioning component works with the end positioning plate and the two side positioning plates to position the glass substrate. Step two: Under the action of translation mechanism one, the U-shaped frame is moved with the inkjet coating head from one end of the glass substrate to the other. During this process, under the action of liquid supply component one, liquid crystal is sprayed onto the surface of the glass substrate through the inkjet coating head and coating nozzle.

[0015] The beneficial effects of this invention are: 1. In use, the glass substrate to be processed is placed on multiple conveyor rollers. The conveyor rollers rotate, causing the glass substrate to move towards the end positioning plate while adhering to the inner walls of the two side positioning plates, until one side of the glass substrate contacts the side wall of the end positioning plate. Then, the auxiliary positioning component works with the end positioning plate and the two side positioning plates to position the glass substrate. Then, under the action of the translation mechanism, the U-shaped frame moves with the inkjet coating head from one end of the glass substrate to the other. During this process, under the action of the liquid supply component, the liquid crystal is sprayed onto the surface of the glass substrate through the inkjet coating head and coating nozzles. Since each inkjet coating head has multiple coating nozzles, the inkjet coating head can spray a row of fine liquid crystals at a time, resulting in high coating efficiency and good uniformity.

[0016] 2. In the initial state, the translation seat is located in the middle of the translation groove. At this time, the telescopic end of the electric actuator is in the retracted state. The upper surface of the contact wheel is flush with the upper surface of the conveying roller, which allows the contact wheel to cooperate with the conveying roller to transport the glass substrate. When one end of the glass substrate moves and contacts the end positioning plate, the contact wheel is no longer in contact with the glass substrate. Then, the telescopic end of the electric actuator extends, pushing the lifting plate, mounting plate, and contact wheel upward a certain distance. At this time, the height of the center of the contact wheel matches the height of the glass substrate. Then, under the action of the translation mechanism, the translation seat moves with the contact wheel towards the glass substrate until the contact wheel contacts the end of the glass substrate, thus limiting and fixing the glass substrate. This is convenient to use.

[0017] 3. After the U-shaped frame moves the inkjet coating head to complete the coating operation on the glass substrate, the U-shaped frame moves the inkjet coating head to directly above the sponge wiping roller. Then, the working motor drives the sponge wiping roller to rotate. Then, the lifting unit drives the lifting plate, the mounting plate, and the sponge wiping roller to move upward, so that the rotating sponge wiping roller contacts the lower end of the coating nozzle, thereby wiping away the small amount of residual liquid crystal adhering to the end of the coating nozzle, preventing the residual liquid crystal from solidifying and affecting the liquid output of the coating nozzle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram showing the connection between the U-shaped frame and the inkjet coating head in this invention; Figure 5 This is a schematic diagram of the structure of the inkjet coating head in this invention; Figure 6 This is a schematic diagram showing the connection between the translation seat and the electric actuator 2 in this invention; Figure 7 This is a schematic diagram of the connection of the lifting groove one in this invention; Figure 8 This is a schematic diagram showing the connection between the lifting plate 2 and the mounting plate 2 in this invention; Figure 9 This is a schematic diagram showing the connection between the mounting plate 2 and the sponge wiping roller in this invention; Figure 10 This is a schematic diagram showing the connection between the base and the support frame in this invention; Figure 11 This is a schematic diagram of the connection between the support frame and the scraper in this invention. Figure 1 ; Figure 12 This is a schematic diagram of the connection between the support frame and the scraper in this invention. Figure 2 ; Figure 13 This is a schematic diagram of the connection between the scraper blade 2 and the vertical plate in this invention. Figure 1 ; Figure 14 This is a schematic diagram of the connection between the scraper blade 2 and the vertical plate in this invention. Figure 2 .

[0019] In the diagram: 100. Workbench; 101. U-shaped frame; 102. Inkjet coating head; 103. Coating nozzle; 104. Liquid supply hose 1; 105. Conveyor roller; 106. Side positioning plate; 107. End positioning plate; 108. Sliding groove; 109. Sliding seat; 110. Lead screw 1; 200. Translation groove; 201. Translation seat; 202. Lifting groove 1; 203. Lifting plate 1; 204. Mounting plate 1; 205. Abutment wheel; 206. Electric actuator 1; 207. Electric actuator 2; 208. Guide slider; 300. Lifting plate II; 301. Mounting plate II; 302. Sponge wiping roller; 303. Working motor II; 304. Base; 305. Collection groove; 306. Support frame; 307. Scraper I; 308. Connecting plate; 309. Scraper II; 310. Lead screw II; 311. Working motor III; 312. Guide rod; 313. Spray head; 314. Left nozzle; 315. Right nozzle; 316. Liquid supply hose II; 317. Vertical plate; 318. Horizontal plate; 319. Suspension rope; 320. Small ball; 321. Contact switch; 400. Glass substrate. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Reference Figures 1-14 A liquid crystal coating device includes a worktable 100. A U-shaped frame 101 is movably mounted on the upper surface of the worktable 100. Two inkjet coating heads 102 are symmetrically fixed on one side of the U-shaped frame 101. Multiple coating nozzles 103 are mounted on the lower surface of each inkjet coating head 102. A liquid supply hose 104 is connected to the upper surface of each inkjet coating head 102. The other end of the liquid supply hose 104 is connected to an external liquid supply assembly. Multiple conveying rollers 105 are rotatably mounted on the upper surface of the worktable 100. Two side positioning plates 106 are symmetrically fixed on the upper surface of the worktable 100. An end positioning plate 107 is fixed on the upper surface of the worktable 100. An auxiliary positioning assembly is also provided on the worktable 100. A translation mechanism is provided on the worktable 100 to cooperate with the U-shaped frame 101.

[0022] Liquid supply component one is existing technology. Liquid supply component one includes a liquid crystal supply tank and a liquid pump one. The liquid crystal supply tank contains liquid crystal. The liquid outlet of the liquid crystal supply tank is connected to the input end of the liquid pump one. The output end of the liquid pump one is connected to the end of the liquid supply hose one 104. Realizing the delivery of liquid crystal is a conventional technical means in this field.

[0023] The worktable 100 is equipped with a drive unit that works in conjunction with the rotation of multiple conveying rollers 105. The rotation of multiple conveying rollers 105 is a conventional technical means in this field.

[0024] The U-shaped frame 101 and the inkjet coating head 102 are detachably connected, and the specific connection method is existing technology.

[0025] In use, the glass substrate 400 to be processed is placed on multiple conveying rollers 105. Then, the conveying rollers 105 rotate, causing the glass substrate 400 to move towards the end positioning plate 107 while adhering to the inner walls of the two side positioning plates 106, until one side of the glass substrate 400 contacts the side wall of the end positioning plate 107. Then, the auxiliary positioning component works with the end positioning plate 107 and the two side positioning plates 106 to position the glass substrate 400. Then, under the action of the translation mechanism, the U-shaped frame 101 moves with the inkjet coating head 102 from one end of the glass substrate 400 to the other end. During this process, under the action of the liquid supply component, liquid crystal is sprayed onto the surface of the glass substrate 400 through the inkjet coating head 102 and the coating nozzle 103. Since each inkjet coating head 102 has multiple coating nozzles 103, the inkjet coating head 102 can spray a row of fine liquid crystals at a time, resulting in high coating efficiency and good uniformity.

[0026] The size of the liquid crystal dots is related to the liquid crystal material and its stability. For a specific material, there is an optimal temperature range; above or below this temperature, the effect is not good. The optimal temperature range is 35°C to 40°C, and the temperature is controlled by a PID algorithm with a control accuracy of 0.1°C.

[0027] The translation mechanism includes two sliding grooves 108 formed on the upper surface of the worktable 100. Each sliding groove 108 has a sliding seat 109 slidably disposed therein. The sliding seat 109 is fixedly connected to the lower end face of the U-shaped frame 101. A lead screw 110 is rotatably disposed on the inner wall of each sliding groove 108. The lead screw 110 is threaded through the corresponding sliding seat 109. A working motor 1 is disposed inside the worktable 100 to cooperate with the rotation of the lead screw 110.

[0028] When the working motor drives the lead screw 110 to rotate, it will drive the sliding seat 109 to move, thereby driving the U-shaped frame 101 to cooperate with the inkjet coating head 102 to perform liquid crystal coating work.

[0029] The auxiliary positioning component includes a translation groove 200 formed on the upper surface of the worktable 100. A translation seat 201 is slidably arranged in the translation groove 200. A lifting groove 202 is formed on the upper surface of the translation seat 201. A lifting plate 203 is movably arranged in the lifting groove 202. Multiple pairs of mounting plates 204 are symmetrically fixed on the upper surface of the lifting plate 203. Each pair of mounting plates 204 is rotatably provided with a contact wheel 205. Multiple electric push rods 206 are fixed on the inner bottom of the lifting groove 202. The end of the telescopic end of the electric push rod 206 is fixedly connected to the lower surface of the lifting plate 203. A translation mechanism 2 is provided on the worktable 100 to cooperate with the translation seat 201.

[0030] In the initial state, the translation seat 201 is located in the middle of the translation groove 200. At this time, the telescopic end of the electric actuator 206 is in the retracted state. The upper surface of the contact wheel 205 is flush with the upper surface of the conveying roller 105, so that the contact wheel 205 can cooperate with the conveying roller 105 to transport the glass substrate 400. When one end of the glass substrate 400 moves and contacts the end positioning plate 107, the contact wheel 205 is no longer in contact with the glass substrate 400. Then, the telescopic end of the electric actuator 206 extends, pushing the lifting plate 203, the mounting plate 204 and the contact wheel 205 to move upward a certain distance. At this time, the height of the center of the contact wheel 205 matches the height position of the glass substrate 400. Then, under the action of the translation mechanism, the translation seat 201 moves with the contact wheel 205 towards the direction close to the glass substrate 400 until the contact wheel 205 contacts the end of the glass substrate 400, limiting and fixing the glass substrate 400, which is convenient to use.

[0031] The translation mechanism 2 includes multiple electric actuators 207. Multiple side grooves are provided on the inner wall of the translation groove 200. The electric actuators 207 are fixed in the side grooves. The ends of the extension and retraction ends of the electric actuators 207 are fixedly connected to the translation seat 201. Guide sliders 208 are fixed on both sides of the translation seat 201. Two guide grooves are symmetrically provided on the inner wall of the translation groove 200. The guide sliders 208 are slidably disposed in the guide grooves.

[0032] In the initial state, the telescopic end of the electric actuator 207 is in a retracted state. When the translation seat 201 needs to move closer to the glass substrate 400, the telescopic end of the electric actuator 207 extends, driving the translation seat 201 and the contact wheel 205 to move.

[0033] The upper surface of the workbench 100 is provided with multiple lifting slots 2. Each lifting slot 2 is equipped with a lifting plate 2 300 that is movably installed. Each lifting plate 2 300 has two mounting plates 2 301 symmetrically fixed on its upper surface. Each pair of mounting plates 2 301 is rotatably mounted with a sponge wiping roller 302. The side wall of the mounting plate 2 301 is fixed with a working motor 2 303 that works with the sponge wiping roller 302. The workbench 100 is provided with multiple auxiliary cleaning components that work with the corresponding sponge wiping roller 302. The lifting slot 2 is provided with a lifting unit that works with the lifting plate 2 300. The lifting unit is existing technology, and the lifting displacement of the lifting plate 2 300 is a conventional technical means in this field.

[0034] After the U-shaped frame 101 moves the inkjet coating head 102 to complete the coating operation on the glass substrate 400, the U-shaped frame 101 moves the inkjet coating head 102 to directly above the sponge wiping roller 302. Then, the working motor 303 drives the sponge wiping roller 302 to rotate. Then, the lifting unit drives the lifting plate 300, the mounting plate 301 and the sponge wiping roller 302 to move upward, so that the rotating sponge wiping roller 302 contacts the lower end of the coating nozzle 103, thereby wiping away the small amount of residual liquid crystal adhering to the end of the coating nozzle 103, preventing the residual liquid crystal from solidifying and affecting the liquid output of the coating nozzle 103.

[0035] Each auxiliary cleaning component includes a base 304 fixed to the upper surface of the workbench 100. A collection groove 305 is provided on the upper surface of the base 304. A support frame 306 is fixed to the bottom of the collection groove 305. A scraper 307 is fixed at an angle on the upper surface of the support frame 306. A drain pipe communicating with the collection groove 305 is provided through the base 304.

[0036] In the initial state, the sponge wiping roller 302 is in contact with the end of the scraper 307. When the sponge wiping roller 302 needs to move upward to wipe and clean the coating nozzle 103, the lifting unit drives the lifting plate 300, the mounting plate 301, and the sponge wiping roller 302 to move upward. The upward-moving lifting plate 300 and the mounting plate 301 will not interfere with the scraper 307. After the sponge wiping roller 302 has finished wiping the coating nozzle 103, the lifting unit drives the lifting plate 300, the mounting plate 301, and the sponge wiping roller 302 to move upward. The mounting plate 301 and the sponge wiping roller 302 move downwards to reset. At this time, the sponge wiping roller 302 again comes into contact with one end of the scraper 307. Since the sponge wiping roller 302 rotates counterclockwise, it works with the scraper 307 during rotation to squeeze out the liquid crystal adhering to the surface of the sponge wiping roller 302 and scrape it onto the scraper 307. This ensures the cleanliness of the sponge wiping roller 302 as much as possible, allowing it to be reused and reducing the number of times it needs to be replaced.

[0037] Each scraper has a connecting plate 308 fixed on both sides. A scraper 309 is movably arranged between the two connecting plates 308. A lead screw 310 is rotatably arranged between the two connecting plates 308. The lead screw 310 is threaded through the scraper 309. A working motor 311 for cooperating with the rotation of the lead screw 310 is fixed on the side wall of one of the connecting plates 308. Two guide rods 312 are fixed between the two connecting plates 308. Each guide rod 312 movably passes through the scraper 309.

[0038] Each time the sponge wiping roller 302 moves upward to wipe the coating nozzle 103, the working motor 311 drives the lead screw 310 to rotate, causing the scraper 309 to move once in a single stroke. This allows the scraper 309 to scrape off the liquid crystal on the scraper 307, preventing it from affecting the next use of the scraper 307. Since the scraper 307 needs to be used in conjunction with the sponge wiping roller 302, it needs to be cleaned.

[0039] Each scraper blade 309 has an arc-shaped notch on its upper surface. A spray head 313 is fixed in the arc-shaped notch. A left nozzle 314 and a right nozzle 315 are connected to the outer surface of the spray head 313. A left solenoid valve and a right solenoid valve are installed inside the spray head 313. A liquid supply hose 316 is connected to the spray head 313. The other end of the liquid supply hose 316 is connected to the external liquid supply assembly 2.

[0040] The second liquid supply component is existing technology. The second liquid supply component includes a cleaning liquid supply tank and a second liquid pump. The outlet end of the cleaning liquid supply tank is connected to the input end of the second liquid pump, and the output end of the second liquid pump is connected to the second liquid supply hose 316.

[0041] When scraper 2 309 moves away from working motor 311, the left solenoid valve and left nozzle 314 work, and liquid supply assembly 2 sprays cleaning fluid from left nozzle 314 through the cooperation of liquid supply hose 2 316 and left solenoid valve, so that scraper 2 309 can scrape and clean the liquid crystal on scraper 1 307.

[0042] Each scraper 309 has a vertical plate 317 fixed to its upper end face, a horizontal plate 318 fixed to its upper end face, and two suspension ropes 319 symmetrically fixed to the lower end face of the horizontal plate 318. A small ball 320 is fixed to the lower end face of each suspension rope 319. A contact switch 321 for use with the small ball 320 is fixed to both sides of the vertical plate 317. A control box for use with the contact switch 321 is provided on the workbench 100.

[0043] Contact switch 321 receives only the initial contact signal each time it moves from start to stop.

[0044] When scraper 2 309 moves to the left (moving away from working motor 311), at the instant scraper 2 309 begins to move, the small ball 320 on the left side will collide with the contact switch 321 on the left side under the action of inertial force. At this time, the left solenoid valve works and the cleaning fluid is sprayed out from the left nozzle 314.

[0045] When scraper 2 309 moves to the right (towards the direction of working motor 311), at the instant scraper 2 309 begins to move, the small ball 320 on the right side will collide with the contact switch 321 on the right side under the action of inertial force. At this time, the solenoid valve on the right side will work, and the cleaning fluid will be sprayed out from the nozzle 315 on the right side.

[0046] A liquid crystal coating process, the specific steps of which are as follows:

[0047] Step 1: Place the glass substrate 400 to be processed onto the conveying roller 105. Then, the conveying roller 105 rotates, causing the glass substrate 400 to move towards the end positioning plate 107 while adhering to the inner walls of the two side positioning plates 106, until one side of the glass substrate 400 contacts the side wall of the end positioning plate 107. Then, the auxiliary positioning component works with the end positioning plate 107 and the two side positioning plates 106 to position the glass substrate 400. Step two: Under the action of translation mechanism one, the U-shaped frame 101 is moved with the inkjet coating head 102 from one end of the glass substrate 400 to the other end. During this process, under the action of liquid supply component one, liquid crystal is sprayed onto the surface of the glass substrate 400 through inkjet coating head 102 and coating nozzle 103.

[0048] In use, the glass substrate 400 to be processed is placed on multiple conveying rollers 105. The conveying rollers 105 rotate, causing the glass substrate 400 to move towards the end positioning plate 107 while adhering to the inner walls of the two side positioning plates 106, until one side of the glass substrate 400 contacts the side wall of the end positioning plate 107. Then, the auxiliary positioning component works with the end positioning plate 107 and the two side positioning plates 106 to position the glass substrate 400. Then, under the action of the translation mechanism, the U-shaped frame 101 moves with the inkjet coating head 102 from one end of the glass substrate 400 to the other end. During this process, under the action of the liquid supply component, liquid crystal is sprayed onto the surface of the glass substrate 400 through the inkjet coating head 102 and the coating nozzle 103. Since each inkjet coating head 102 has multiple coating nozzles 103, the inkjet coating head 102 can spray a row of fine liquid crystals at a time, resulting in high coating efficiency. In the initial state, the translation seat 201 is located in the middle of the translation groove 200. At this time, the telescopic end of the electric push rod 206 is in the retracted state. The upper surface of the abutment wheel 205 is flush with the upper surface of the conveying roller 105, so that the abutment wheel 205 can cooperate with the conveying roller 105 to transport the glass substrate 400. When one end of the glass substrate 400 moves and contacts the end positioning plate 107, the abutment wheel 205 is no longer in contact with the glass substrate 400. Then the telescopic end of the electric push rod 206 extends, pushing the lifting plate 203, the mounting plate 204 and the abutment wheel 205 to move upward a certain distance. At this time, the height of the center of the abutment wheel 205 matches the height position of the glass substrate 400. Then, under the action of the translation mechanism 2, the translation seat 201 moves with the abutment wheel 205 towards the direction close to the glass substrate 400 until the abutment wheel 205 abuts against the end of the glass substrate 400, limiting and fixing the glass substrate 400, which is convenient to use. After the U-shaped frame 101 moves the inkjet coating head 102 to complete the spraying operation on the glass substrate 400, the U-shaped frame 101 moves the inkjet coating head 102 to directly above the sponge wiping roller 302. Then, the working motor 303 drives the sponge wiping roller 302 to rotate. Then, the lifting unit drives the lifting plate 300, the mounting plate 301 and the sponge wiping roller 302 to move upward, so that the rotating sponge wiping roller 302 contacts the lower end of the coating nozzle 103, thereby wiping away the small amount of residual liquid crystal adhering to the end of the coating nozzle 103, and preventing the residual liquid crystal from solidifying and affecting the liquid output of the coating nozzle 103. In the initial state, the sponge wiping roller 302 is in contact with the end of the scraper 307. When the sponge wiping roller 302 needs to move upward to wipe and clean the coating nozzle 103, the lifting unit drives the lifting plate 300, the mounting plate 301, and the sponge wiping roller 302 to move upward. The upward-moving lifting plate 300 and the mounting plate 301 will not interfere with the scraper 307. After the sponge wiping roller 302 has finished wiping the coating nozzle 103, the lifting unit drives the lifting plate 300, the mounting plate 301, and the sponge wiping roller 302 to move upward. The mounting plate 301 and the sponge wiping roller 302 move downwards to reset. At this time, the sponge wiping roller 302 again comes into contact with one end of the scraper 307. Since the sponge wiping roller 302 rotates counterclockwise, it works with the scraper 307 during rotation to squeeze out the liquid crystal adhering to the surface of the sponge wiping roller 302 and scrape it onto the scraper 307. This ensures the cleanliness of the sponge wiping roller 302 as much as possible, allowing it to be reused and reducing the number of times it needs to be replaced.

[0049] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A liquid crystal coating apparatus, comprising a worktable (100), characterized in that, The upper surface of the workbench (100) is movably provided with a U-shaped frame (101). Two inkjet coating heads (102) are symmetrically fixed on one side of the U-shaped frame (101). Multiple coating nozzles (103) are provided on the lower surface of each inkjet coating head (102). A liquid supply hose (104) is connected to the upper surface of each inkjet coating head (102). The other end of the liquid supply hose (104) is connected to an external liquid supply component. Multiple conveying rollers (105) are rotatably provided on the upper surface of the workbench (100). Two side positioning plates (106) are symmetrically fixed on the upper surface of the workbench (100). An end positioning plate (107) is fixed on the upper surface of the workbench (100). An auxiliary positioning component is also provided on the workbench (100). A translation mechanism is provided on the workbench (100) to cooperate with the U-shaped frame (101).

2. The liquid crystal coating equipment according to claim 1, characterized in that, The translation mechanism includes two sliding grooves (108) on the upper surface of the worktable (100). Each sliding groove (108) has a sliding seat (109) slidably disposed therein. The sliding seat (109) is fixedly connected to the lower end face of the U-shaped frame (101). Each sliding groove (108) has a lead screw (110) rotatably disposed on the inner wall of the inner wall. The lead screw (110) is threaded through the corresponding sliding seat (109). The worktable (100) is provided with a working motor that works in conjunction with the rotation of the lead screw (110).

3. The liquid crystal coating equipment according to claim 1, characterized in that, The auxiliary positioning component includes a translation groove (200) opened on the upper surface of the worktable (100), a translation seat (201) slidably arranged in the translation groove (200), a lifting groove (202) opened on the upper surface of the translation seat (201), a lifting plate (203) movably arranged in the lifting groove (202), a plurality of mounting plates (204) symmetrically fixed on the upper surface of the lifting plate (203), a contact wheel (205) rotatably arranged on each pair of mounting plates (204), a plurality of electric push rods (206) fixed on the inner bottom of the lifting groove (202), the end of the extension end of the electric push rod (206) is fixedly connected to the lower surface of the lifting plate (203), and a translation mechanism (2) used in conjunction with the translation seat (201) is provided on the worktable (100).

4. The liquid crystal coating equipment according to claim 3, characterized in that, The translation mechanism includes multiple electric actuators (207). Multiple side grooves are provided on the inner wall of the translation groove (200). The electric actuators (207) are fixed in the side grooves. The end of the extension end of the electric actuators (207) is fixedly connected to the translation seat (201). Guide sliders (208) are fixed on both sides of the translation seat (201). Two guide grooves are symmetrically provided on the inner wall of the translation groove (200). The guide sliders (208) are slidably disposed in the guide grooves.

5. The liquid crystal coating equipment according to claim 1, characterized in that, The upper surface of the workbench (100) is provided with multiple lifting slots, and each lifting slot is provided with a lifting plate (300) that is movably installed. Each lifting plate (300) has two mounting plates (301) symmetrically fixed on its upper surface. Each pair of mounting plates (301) is provided with a sponge wiping roller (302) that is rotatably installed. The side wall of the mounting plate (301) is fixed with a working motor (303) that works with the sponge wiping roller (302). The workbench (100) is provided with multiple auxiliary cleaning components that work with the corresponding sponge wiping roller (302). The lifting slot is provided with a lifting unit that works with the lifting plate (300).

6. A liquid crystal coating apparatus according to claim 5, characterized in that, Each of the auxiliary cleaning components includes a base (304) fixed to the upper surface of the workbench (100), a collection groove (305) is provided on the upper surface of the base (304), a support frame (306) is fixed to the bottom of the collection groove (305), a scraper (307) is fixed to the upper surface of the support frame (306) at an angle, and a drain pipe communicating with the collection groove (305) is provided through the base (304).

7. A liquid crystal coating apparatus according to claim 6, characterized in that, Each of the scrapers is fixed with a connecting plate (308) on both sides. A scraper 2 (309) is movably arranged between the two connecting plates (308). A lead screw 2 (310) is rotatably arranged between the two connecting plates (308). The lead screw 2 (310) is threaded through the scraper 2 (309). A working motor 3 (311) is fixed on the side wall of one of the connecting plates (308) to cooperate with the rotation of the lead screw 2 (310). Two guide rods (312) are fixed between the two connecting plates (308). Each guide rod (312) movably passes through the scraper 2 (309).

8. A liquid crystal coating apparatus according to claim 6, characterized in that, Each scraper blade (309) has an arc-shaped notch on its upper surface. A spray head (313) is fixed in the arc-shaped notch. A left nozzle (314) and a right nozzle (315) are connected to the outer surface of the spray head (313). A left solenoid valve and a right solenoid valve are installed inside the spray head (313). A liquid supply hose (316) is connected to the spray head (313). The other end of the liquid supply hose (316) is connected to the external liquid supply assembly (2).

9. A liquid crystal coating apparatus according to claim 8, characterized in that, Each scraper (309) has a vertical plate (317) fixed to its upper end face, a horizontal plate (318) fixed to its upper end face, two hanging ropes (319) symmetrically fixed to the lower end face of the horizontal plate (318), a small ball (320) fixed to the lower end face of each hanging rope (319), a contact switch (321) for use with the small ball (320) fixed to both sides of the vertical plate (317), and a control box for use with the contact switch (321) provided on the workbench (100).

10. A liquid crystal coating process, characterized in that, The specific steps are as follows: Step 1: Place the glass substrate (400) to be processed onto the conveying roller (105). Then the conveying roller (105) rotates, causing the glass substrate (400) to move towards the end positioning plate (107) along the inner walls of the two side positioning plates (106) until one side of the glass substrate (400) contacts the side wall of the end positioning plate (107). Then the auxiliary positioning component works with the end positioning plate (107) and the two side positioning plates (106) to position the glass substrate (400). Step 2: Under the action of translation mechanism 1, the U-shaped frame (101) is moved with inkjet coating head (102) from one end of glass substrate (400) to the other end. During this process, under the action of liquid supply component 1, liquid crystal is sprayed onto the surface of glass substrate (400) through inkjet coating head (102) and coating nozzle (103).

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