A slurry printing device for LED screen production and a method thereof

Abstract

The application relates to the technical field of LED display screen manufacturing, and discloses a slurry engraving equipment for LED screen production and a method thereof, which comprises a guide rod, an engraving table, a machine case and an engraver. In the application, the rotating shaft rotates through the friction rotation of the rubber ring on the surface of the glass substrate. Since the stress disc on the side of the central rod extrudes the fixing rod, the central rod moves upwards. Therefore, when the rubber ring rolls on the surface of the glass substrate, the rotating shaft contacts the surface of the glass substrate in an interval mode through the movable mechanism. In this way, the slurry is closely engraved on the surface of the glass substrate under the rotating pressure of the rotating shaft in a mode of transferring and engraving through the rotating shaft. The problem that the slurry accumulation caused by silk screen engraving forms a broken line or cannot be connected is avoided. The precision of the slurry texture is not affected through the rolling and engraving. The position of the middle screw rod of the stress disc in the hollow groove is manually adjusted, the interval of the rotating shaft from the surface of the glass substrate is adjusted, and the interval adjustment can be conveniently conducted according to different intervals of LED lamp beads.

Description

Technical Field

[0001] This invention relates to the field of LED display manufacturing technology, specifically to a paste engraving device and method for LED screen production. Background Technology

[0002] The circuitry within the LED screen uses a conductive paste. By imprinting the paste onto the LED screen's substrate, the circuitry of multiple LED beads on the substrate surface is achieved. Before curing, the paste is imprinted onto the substrate using screen printing technology. The imprinting method involves pouring the paste into a screen frame, applying pressure to the screen surface with a squeegee, and moving it to transfer the paste through the mesh to a designated area on the substrate, forming the outline of the circuit pattern. Subsequently, the paste is cured through high-temperature treatment to form a dense metal film layer.

[0003] However, during the engraving process, because there are gaps between the LED beads, and the paste does not need to be engraved at the position of the LED beads, there needs to be a gap between the paste pieces. Moreover, this gap changes as the size of the LED beads changes. The mesh openings between the frames are not fixed, which is not conducive to practical use after the gaps change. Furthermore, when the squeegee applies pressure and moves on the screen surface, because the substrate of the LED screen is made of glass, and the mesh openings in the engraved screen are small, if the mesh openings become clogged or the squeegee pressure is too high or the gap is too small, the contact area between the squeegee and the screen will be too large, causing residual paste to accumulate, resulting in broken lines or inability to connect, which affects the accuracy of the paste texture. Summary of the Invention

[0004] This invention provides a paste engraving device and method for LED screen production, which overcomes the shortcomings described in the background art.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An LED screen production paste engraving device includes guide rods, an engraving table, a chassis, and an engraver. The chassis is located on the side of the engraving table, and the surface of the chassis is provided with arranged guide rods. The engraver is L-shaped, with one side of the engraver fixed to the side of the engraving table and the other side parallel to the surface of the engraving table.

[0007] The etching stage includes a glass substrate, rollers, an etching mechanism, a chain, and support bars. There are two support bars, which are distributed parallel to each other on the surface of the support platform. Rollers are arranged at equal intervals inside the support bars and are connected by a chain. The chain drives the equally spaced rollers to rotate synchronously. The glass substrate moves between the two support bars, and the rollers rotate around the edge of the glass substrate. The etching mechanism extends and moves laterally within the etching unit, and its lower end abuts against the surface of the glass substrate, causing the etching mechanism to roll and etch the paste onto the surface of the glass substrate.

[0008] Furthermore: the roller is equipped with a gear block, a rotating rod and a rubber belt. The rotating rod rotates inside the support bar, and the rubber belt on the outside of the rotating rod rotates and rubs against the edge of the glass substrate. The support platform is equipped with a motor, and the output end of the motor corresponds to the lower end of one of the rotating rods inside the support bar. The upper end of the rotating rod is equipped with a gear block, and the rotating rods are connected by a chain on the gear block to rotate synchronously.

[0009] Furthermore: the engraving mechanism includes a long box, a spring, a scraper, and an engraving shaft. The engraving shaft rotates at the lower inner side of the long box and rolls against the surface of the glass substrate. The slurry inside the long box is discharged and transferred to the upper end of the engraving shaft, causing the engraving shaft to rotate and engrave on the surface of the glass substrate. A spring is fixedly inclined on the right side of the long box, and the scraper elastically scrapes the surface of the glass substrate through the spring.

[0010] Furthermore: the scraper is provided with a plastic strip and a support plate. The plastic strip is located on the side of the support plate. When the spring is at rest, the scraper is tilted at 45°. When the engraving shaft rolls on the surface of the glass substrate, the support plate drives the plastic strip to tilt and scrape the surface of the glass substrate through the spring on the right side of the long box.

[0011] Furthermore: the support bar is L-shaped, and the surface of the L-shaped corner of the support bar is provided with arranged balls, and the balls support the rolling of the glass substrate on the lower surface. The rubber band is wider at the top and narrower at the bottom, and keeps the glass substrate moving horizontally relative to the rubber band. When the outer side of the rubber band rubs against the edge of the glass substrate, the rolling of the balls reduces the friction required for the glass substrate to move.

[0012] Furthermore: the engraving shaft is equipped with a rotating shaft, a movable mechanism, and a rubber ring. The rubber ring is located on the outer side of both ends of the rotating shaft and rolls against the surface of the glass substrate. The rotating shaft rotates through the movable mechanism. The elongated box body consists of a discharge port and a main box. The movable mechanism rotates in the main box. The discharge ports are equidistantly arranged at the lower end of the main box, and the lower ends of the discharge ports abut against the outer side of the rotating shaft. Through the rotation of the rotating shaft, the slurry is discharged from the discharge port at the lower end of the main box to the outer side of the rotating shaft.

[0013] Furthermore: the movable mechanism includes a fixed rod, a screw, a support rod, a spring rod, a force-receiving plate, a central rod, and a bearing ring. The upper end of the spring rod is fixed inside the main housing, and the bearing ring at the lower end of the spring rod is supported by a bearing on the outside of the central rod. The support rod and the fixed rod are fixed horizontally inside the main housing. The force-receiving plate is distributed in a ring on the side of the central rod through the screw. When the central rod rotates, the central rod presses against the fixed rod through the force-receiving plate, and the bearing ring on the outside of the central rod compresses the spring rod upward. The side of the central rod is provided with two threaded grooves, and the screw in the force-receiving plate is fixed in the threaded grooves.

[0014] A method for using a paste etching device for LED screen production, based on the aforementioned paste etching device for LED screen production, is characterized by the following steps:

[0015] S1: The glass substrate is transported by the rotation of the guide rod, so that the glass substrate is transferred between the two support bars. At this time, the rollers on the inner side of the support bars are rotated by the motor, and under the transmission of the chain belt, the rollers synchronously rub against the edge of the glass substrate, so that the glass substrate moves to the engraving position.

[0016] S2: The engraver drives the engraving mechanism to extend and retract, and controls the engraving mechanism to move left and right on the surface of the glass substrate, so that the engraving mechanism rolls against the surface of the glass substrate to engrave. At this time, the scraper scrapes the impurities off the surface of the glass substrate through the elasticity of the spring, and the engraving shaft rolls against the surface of the glass substrate, so that the slurry inside the long box is guided to the glass substrate by the engraving shaft.

[0017] S3: When the rubber ring rolls on the surface of the glass substrate, the bottom end of the rubber ring is in a compressed state. At this time, the outer side of the rotating shaft touches the surface of the glass substrate. The rolling of the rubber ring on the surface of the glass substrate will cause the slurry to be guided from the discharge port to the outer side of the rotating shaft, and then transferred to the surface of the glass substrate for orderly engraving through the rotating shaft.

[0018] S4: When the rubber ring rolls on the surface of the glass substrate, the central rod rotates between the fixed rod and the support rod. When the force plate squeezes the fixed rod, the central rod generates an upward force under the pressure of the force plate, and the bearing ring on the outside of the central rod compresses the spring rod upward. As a result, the central rod drives the rotating shaft to move upward, so that the rotating shaft is separated from the contact with the surface of the glass substrate.

[0019] Compared with existing technologies, this technical solution has the following advantages:

[0020] In this invention, the rotating shaft rotates by friction between the rubber ring and the glass substrate surface. The force-bearing plate on the side of the central rod presses against the fixed rod, causing the central rod to move upwards. Thus, as the rubber ring rolls on the glass substrate surface, the rotating shaft intermittently contacts the glass substrate surface through the movable mechanism. This rotating shaft transfers the printing process, ensuring the paste is tightly printed onto the glass substrate surface under the rotational pressure of the shaft. This avoids insufficient printing pressure and low density of the paste, preventing cracking during high-temperature drying. Furthermore, the rolling printing by the rotating shaft avoids the problems of paste accumulation leading to broken lines or disconnections caused by screen printing. The rolling printing also prevents the accuracy of the paste texture from being affected.

[0021] In this invention, the position of the middle screw of the force-receiving plate in the hollow groove is manually adjusted so that when the force-receiving plate is in the outer hollow groove, the outer part of the force-receiving plate protrudes beyond the center rod. At this time, when the center rod rotates, it will drive the force-receiving plate to squeeze the fixing rod. By adjusting the position of multiple adjacent force-receiving plates, the duration of the force-receiving plate squeezing the fixing rod when the center rod rotates is extended, thereby extending the interval of the center rod's upward movement. This adjusts the interval at which the rotating shaft detaches from the glass substrate surface. This interval is the interval at which the paste on the outside of the rotating shaft is transferred to the glass substrate surface, thus realizing the interval adjustment of the paste imprinting, which is convenient for interval adjustment according to LED beads with different intervals. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is an overall diagram of the present invention.

[0024] Figure 2 This is a top view of the engraving platform.

[0025] Figure 3 This is a side view of the roller.

[0026] Figure 4 This is a side view of the engraving mechanism.

[0027] Figure 5 This is a three-dimensional schematic diagram of the scraper.

[0028] Figure 6 This is a planar schematic diagram of the engraving shaft.

[0029] Figure 7 This is a side view of the event organizer.

[0030] In the diagram: Guide rod-1, Engraving table-2, Chassis-3, Engraver-4, Glass substrate-21, Roller-22, Engraving mechanism-23, Chain belt-24, Support bar-25, Support platform-26, Gear block-221, Rotating rod-222, Rubber belt-223, Ball bearing-101, Long strip box-31, Spring-32, Scraper-33, Engraving shaft-34, Plastic strip-331, Support plate-332, Rotating shaft-341, Movable mechanism-342, Rubber ring-343, Discharge port-311, Main box-312, Fixed rod-421, Screw-422, Support rod-423, Spring rod-424, Force plate-425, Center rod-426, Bearing ring-427. Detailed Implementation

[0031] like Figures 1 to 7 As shown, the present invention proposes a paste engraving device for LED screen production, including a guide rod 1, an engraving table 2, a chassis 3 and an engraver 4. The chassis 3 is located on the side of the engraving table 2, and the surface of the chassis 3 is provided with arranged guide rods 1. The engraver 4 is L-shaped, with one side of the engraver 4 fixed to the side of the engraving table 2 and the other side parallel to the surface of the engraving table 2.

[0032] The etching table 2 is provided with a glass substrate 21, rollers 22, etching mechanism 23, chain 24 and support bars 25. There are two support bars 25, which are distributed parallel to each other on the surface of the support platform 26. Rollers 22 are arranged at equal intervals inside the support bars 25 and are connected to each other by the chain 24. Under the drive of the chain 24, the equally spaced rollers 22 rotate synchronously. The glass substrate 21 moves between the two support bars 25 and the rollers 22 rotate and drive the glass substrate 21 along its edge. The etching mechanism 23 moves through the internal extension and lateral movement of the etching device 4, and the lower end of the etching mechanism 23 abuts against the surface of the glass substrate 21, causing the etching mechanism 23 to roll and etch the paste on the surface of the glass substrate 21.

[0033] Furthermore, the glass substrate 21 moves in a horizontal state. The engraver 4 is equipped with a hydraulic device for extending and retracting the engraving mechanism 23. The hydraulic device and the hydraulic device for translating the engraving mechanism 23 cooperate with each other, so that the engraving mechanism 23 rolls left and right against the surface of the glass substrate 21.

[0034] The roller 22 is equipped with a gear block 221, a rotating rod 222, and a rubber belt 223. The rotating rod 222 rotates inside the support bar 25, and the rubber belt 223 on the outside of the rotating rod 222 rotates and rubs against the edge of the glass substrate 21. The support platform 26 is equipped with a motor, and the output end of the motor corresponds to the lower end of one of the rotating rods 222 inside the support bar 25. The upper end of the rotating rod 222 is equipped with a gear block 221, and the rotating rods 222 are connected by a chain belt 24 on the gear block 221 for synchronous rotation.

[0035] Furthermore, since the rubber band 223 is wider at the top and narrower at the bottom, the rubber band 223 will only rub against the edge of the glass substrate 21 and generate a downward force, so that the glass substrate 21 remains stable during movement and prevents the glass substrate 21 from becoming unstable and easily moving up and down when moving horizontally.

[0036] The engraving mechanism 23 includes a long box 31, a spring 32, a scraper 33, and an engraving shaft 34. The engraving shaft 34 rotates at the lower inner side of the long box 31 and rolls against the surface of the glass substrate 21. The slurry in the long box 31 is discharged and transferred to the upper end of the engraving shaft 34, causing the engraving shaft 34 to rotate and engrave on the surface of the glass substrate 21. The spring 32 is fixedly inclined on the right side of the long box 31, and the scraper 33 elastically scrapes the surface of the glass substrate 21 through the spring 32.

[0037] The scraper 33 is provided with a plastic strip 331 and a support plate 332. The plastic strip 331 is located on the side of the support plate 332. When the spring 32 is stationary, the scraper 33 is tilted at 45°. When the engraving shaft 34 rolls on the surface of the glass substrate 21, the support plate 332 drives the plastic strip 331 to tilt and scrape the surface of the glass substrate 21 through the spring 32 on the right side of the long box 31.

[0038] Furthermore, when the etching shaft 34 rolls on the surface of the glass substrate 21, the scraper 33 needs to be kept at an inclined elastic angle under the elastic force of the spring 32, so as to drive the plastic strip 331 to form a scraping effect on the surface of the glass substrate 21, so as to prevent impurities from being present on the surface of the glass substrate 21 during the etching process, which could cause drying and cracking.

[0039] The support bar 25 is L-shaped, and the surface of the L-shaped corner of the support bar 25 is provided with arranged balls 101, which support the rolling of the glass substrate 21 on the lower surface. The rubber band 223 is wider at the top and narrower at the bottom, and keeps the glass substrate 21 moving horizontally relative to the rubber band 223. When the outer side of the rubber band 223 rubs against the edge of the glass substrate 21, the rolling of the balls 101 reduces the friction required for the glass substrate 21 to move.

[0040] Furthermore, when the ball bearing 101 guides the glass substrate 21 to move, it can reduce the friction between the rubber band 223 and the edge of the glass substrate 21. The ball bearing 101 generates greater rolling guidance on the lower surface of the glass substrate 21, avoiding the large elastic friction required when the rubber band 223 rubs against the edge of the glass substrate 21, which facilitates the translation of the heavy glass substrate 21.

[0041] The engraving shaft 34 is provided with a rotating shaft 341, a movable mechanism 342, and a rubber ring 343. The rubber ring 343 is located on the outer side of both ends of the rotating shaft 341 and rolls against the surface of the glass substrate 21. The rotating shaft 341 rotates through the movable mechanism 342. The elongated box 31 is composed of a discharge port 311 and a main box 312. The movable mechanism 342 rotates in the main box 312. The discharge ports 311 are equidistantly arranged at the lower end of the main box 312, and the lower end of the discharge ports 311 abuts against the outer side of the rotating shaft 341. Through the rotation of the rotating shaft 341, the slurry is discharged from the discharge port 311 at the lower end of the main box 312 to the outer side of the rotating shaft 341.

[0042] Furthermore, when the rubber ring 343 rolls against the surface of the glass substrate 21, the hydraulic mechanism, with a pressure range of 0.5-1.2 MPa, works in conjunction with the spring rod 424 to keep the rubber ring 343 in rolling contact. Under the downward elasticity of the spring rod 424, the rubber ring 343 can roll while pressing against the glass substrate 21, preventing the rubber ring 343 from sliding on the surface of the glass substrate 21. The rolling and rotating effect is formed by the pressure friction of the rubber ring 343.

[0043] The movable mechanism 342 includes a fixed rod 421, a screw 422, a support rod 423, a spring rod 424, a force-receiving plate 425, a central rod 426, and a bearing ring 427. The upper end of the spring rod 424 is fixed inside the main housing 312, and the bearing ring 427 at the lower end of the spring rod 424 is supported by a bearing on the outside of the central rod 426. The support rod 423 and the fixed rod 421 are fixed horizontally inside the main housing 312. The force-receiving plate 425 is distributed in a ring on the side of the central rod 426 by the screw 422. When the central rod 426 rotates, the central rod 426 presses against the fixed rod 421 through the force-receiving plate 425, and the bearing ring 427 on the outside of the central rod 426 compresses the spring rod 424 upward. The side of the central rod 426 is provided with two threaded grooves, and the screw 422 in the force-receiving plate 425 is fixed in the threaded grooves.

[0044] Furthermore, the support rod 423 is hollow at the position corresponding to the force-receiving plate 425. When the force-receiving plate 425 protrudes outside the center rod 426, it will not squeeze the support rod 423, but will pass through the hollow position. When the force-receiving plate 425 squeezes the fixing rod 421, the center rod 426 will rise and squeeze upward. At this time, the rubber ring 343 will not detach from the surface of the glass substrate 21. The rubber ring 343 will still rotate and rub against the surface of the glass substrate 21. The rotational force of the rubber ring 343 on the surface of the glass substrate 21 overcomes the squeezing force of the force-receiving plate 425 squeezing the fixing rod 421, so that the center rod 426 moves upward while the bearing rotates in the bearing ring 427.

[0045] In this invention, the rotating shaft 341 rotates by frictional rotation of the rubber ring 343 on the surface of the glass substrate 21. Because the force-bearing plate 425 on the side of the central rod 426 presses against the fixed rod 421, the central rod 426 moves upward. Thus, when the rubber ring 343 rolls on the surface of the glass substrate 21, the rotating shaft 341 contacts the surface of the glass substrate 21 intermittently through the movable mechanism 342. This intermittent transfer of the slurry discharged from the main chamber 312 onto the surface of the glass substrate 21 by the rotating shaft 341 ensures that the slurry is tightly imprinted onto the surface of the glass substrate 21 under the rotational pressure of the rotating shaft 341. This avoids the problem of low density due to insufficient slurry imprinting pressure, preventing cracking of the slurry during high-temperature drying after imprinting. Furthermore, the rolling imprinting by the rotating shaft 341 avoids the problem of slurry accumulation leading to broken lines or disconnections caused by screen printing. The rolling imprinting also prevents the accuracy of the slurry texture from being affected.

[0046] Furthermore, when the center rod 426 rotates, it rotates within the bearing ring 427. When the center rod 426 moves upward, it compresses the spring rod 424 through the bearing ring 427. The bearing ring 427 supports the center rod 426, allowing the rotation and upward movement of the center rod 426 to occur simultaneously. This facilitates the upward movement of the center rod 426 as it rolls with the rubber ring 343.

[0047] Furthermore, when the rotating shaft 341 drives the slurry at the lower end of the discharge port 311, since the lower end of the discharge port 311 is open, the slurry discharged from the discharge port 311 is transferred at the opening position with a certain width. When the slurry is inside the main box 312, a gravity block is provided at the upper end to squeeze the slurry, so that the slurry is discharged downward with a certain pressure. When the rotating shaft 341 rotates, the slurry under a certain pressure is transferred to the outside of the rotating shaft 341 with a certain thickness.

[0048] Furthermore, when the rotating shaft 341 moves upward following the moving mechanism 342, the rotating shaft 341 squeezes the lower end of the discharge port 311. There is a rubber layer at the bottom of the discharge port 311. When the rotating shaft 341 moves upward, it will squeeze the rubber layer. Under the elastic compression of the rubber layer, when the slurry is transferred to the rotating shaft 341, the slurry can be prevented from overflowing from the edges of the rubber layers on both sides by the compression of the rubber layer. This ensures that the slurry is neat when it is transferred to the outside of the rotating shaft 341, and avoids the irregular edges of the slurry affecting the engraving when it is in a ring state on the outside of the rotating shaft 341.

[0049] In this invention, the position of the middle screw 422 of the force-receiving disk 425 in the hollow groove is manually adjusted so that when the force-receiving disk 425 is in the outer hollow groove, the outer part of the force-receiving disk 425 protrudes beyond the outer part of the central rod 426. At this time, when the central rod 426 rotates, it will drive the force-receiving disk 425 to press the fixing rod 421. By adjusting the position of multiple adjacent force-receiving disks 425, the time for the force-receiving disk 425 to press the fixing rod 421 is extended when the central rod 426 rotates. This extends the interval of the upward movement of the central rod 426, thereby adjusting the interval at which the rotating shaft 341 disengages from the surface of the glass substrate 21. This interval is the interval at which the paste on the outside of the rotating shaft 341 is transferred to the surface of the glass substrate 21, thereby realizing the interval adjustment of the paste printing, which is convenient for the interval adjustment according to the different intervals of LED beads.

[0050] A method for using a paste etching device for LED screen production, based on the aforementioned paste etching device for LED screen production, is characterized by the following steps:

[0051] S1: The glass substrate 21 is transported by the rotation of the guide rod 1, so that the glass substrate 21 is transferred between the two support bars 25. At this time, the roller 22 on the inner side of the support bar 25 rotates through the motor and is driven by the chain belt 24 to synchronously rub the edge of the glass substrate 21, so that the glass substrate 21 moves to the imprinting position.

[0052] S2: The engraver 4 drives the engraving mechanism 23 to extend and retract, and controls the engraving mechanism 23 to move left and right on the surface of the glass substrate 21, so that the engraving mechanism 23 rolls and engraves against the surface of the glass substrate 21. At this time, the scraper 33 scrapes away impurities from the surface of the glass substrate 21 through the elasticity of the spring 32, and the engraving shaft 34 rolls against the surface of the glass substrate 21, so that the slurry inside the long box 31 is guided to the glass substrate 21 by the engraving shaft 34.

[0053] S3: When the rubber ring 343 rolls on the surface of the glass substrate 21, the bottom end of the rubber ring 343 is in a compressed state. At this time, the outer side of the rotating shaft 341 abuts against the surface of the glass substrate 21. The rolling of the rubber ring 343 on the surface of the glass substrate 21 will cause the slurry to be guided from the discharge port 311 to the outer side of the rotating shaft 341, and then transferred to the surface of the glass substrate 21 through the rotating shaft 341 for orderly printing.

[0054] S4: When the rubber ring 343 rolls on the surface of the glass substrate 21, the central rod 426 rotates between the fixed rod 421 and the support rod 423. When the force plate 425 presses the fixed rod 421, the central rod 426 generates an upward force under the pressure of the force plate 425, and causes the bearing ring 427 on the outside of the central rod 426 to compress the spring rod 424 upward. As a result, the central rod 426 drives the rotating shaft 341 to move upward, so that the rotating shaft 341 is separated from the contact of the surface of the glass substrate 21.

[0055] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A paste engraving device for LED screen production, characterized in that, It includes guide rods, an engraving table, a chassis, and an engraver. The chassis is located on the side of the engraving table, and the surface of the chassis is provided with arranged guide rods. The engraver is "L" shaped, with one side of the engraver fixed to the side of the engraving table and the other side parallel to the surface of the engraving table. The etching table is provided with a glass substrate, rollers, etching mechanism, chain, and support bars. There are two support bars, which are distributed parallel to each other on the surface of the support platform. Rollers are arranged at equal intervals inside the support bars and are connected by the chain. The chain drives the equally spaced rollers to rotate synchronously. The glass substrate moves between the two support bars, and the rollers rotate and drive the glass substrate along its edge. The etching mechanism moves through internal extension and lateral movement, and the lower end of the etching mechanism abuts against the surface of the glass substrate, causing the etching mechanism to roll and etch the paste on the surface of the glass substrate. The engraving mechanism includes a long box, a spring, a scraper, and an engraving shaft. The engraving shaft rotates at the inner side of the lower end of the long box and rolls against the surface of the glass substrate. The slurry in the long box is discharged and transferred to the upper end of the engraving shaft, causing the engraving shaft to rotate and engrave on the surface of the glass substrate. A spring is fixedly inclined on the right side of the long box, and the scraper elastically scrapes the surface of the glass substrate through the spring. The engraving shaft is equipped with a rotating shaft, a movable mechanism, and a rubber ring. The rubber ring is located on the outer side of both ends of the rotating shaft and rolls against the surface of the glass substrate. The rotating shaft rotates through the movable mechanism. The elongated box consists of a discharge port and a main box. The movable mechanism rotates in the main box. The discharge ports are equidistantly arranged at the lower end of the main box, and the lower ends of the discharge ports abut against the outer side of the rotating shaft. Through the rotation of the rotating shaft, the slurry is discharged from the discharge port at the lower end of the main box to the outer side of the rotating shaft. The movable mechanism includes a fixed rod, a screw, a support rod, a spring rod, a force-receiving plate, a central rod, and a bearing ring. The upper end of the spring rod is fixed inside the main housing, and the bearing ring at the lower end of the spring rod is supported by a bearing on the outside of the central rod. The support rod and the fixed rod are fixed horizontally inside the main housing. The force-receiving plate is distributed in a ring on the side of the central rod by the screw. When the central rod rotates, the central rod compresses the fixed rod through the force-receiving plate, and the bearing ring on the outside of the central rod compresses the spring rod upward. The side of the central rod is provided with two threaded grooves, and the screw in the force-receiving plate is fixed in the threaded grooves.

2. The paste engraving equipment for LED screen production according to claim 1, characterized in that, The roller is equipped with a gear block, a rotating rod, and a rubber belt. The rotating rod rotates inside the support bar, and the rubber belt on the outside of the rotating rod rotates and rubs against the edge of the glass substrate. The support platform is equipped with a motor, and the output end of the motor corresponds to the lower end of one of the rotating rods inside the support bar. The upper end of the rotating rod is equipped with a gear block, and the rotating rods are connected by a chain on the gear block to rotate synchronously.

3. The paste engraving equipment for LED screen production according to claim 2, characterized in that, The scraper has a plastic strip and a support plate. The plastic strip is located on the side of the support plate. When the spring is at rest, the scraper is tilted at 45°. When the engraving shaft rolls on the surface of the glass substrate, the support plate drives the plastic strip to tilt and scrape the surface of the glass substrate through the spring on the right side of the long box.

4. The paste engraving equipment for LED screen production according to claim 3, characterized in that, The support bar is L-shaped, and the surface of the L-shaped corner of the support bar is provided with arranged balls, which support the rolling of the glass substrate on the lower surface. The rubber band is wider at the top and narrower at the bottom, and keeps the glass substrate moving horizontally relative to the rubber band. When the outer side of the rubber band rubs against the edge of the glass substrate, the rolling of the balls reduces the friction required for the glass substrate to move.

5. A method of using a paste etching device for LED screen production, based on the paste etching device for LED screen production as described in claim 4, characterized in that... The specific usage method is as follows: S1: The glass substrate is transported by the rotation of the guide rod, so that the glass substrate is transferred between the two support bars. At this time, the rollers on the inner side of the support bars are rotated by the motor, and under the transmission of the chain belt, the rollers synchronously rub against the edge of the glass substrate, so that the glass substrate moves to the engraving position. S2: The engraver drives the engraving mechanism to extend and retract, and controls the engraving mechanism to move left and right on the surface of the glass substrate, so that the engraving mechanism rolls against the surface of the glass substrate to engrave. At this time, the scraper scrapes the impurities off the surface of the glass substrate through the elasticity of the spring, and the engraving shaft rolls against the surface of the glass substrate, so that the slurry inside the long box is guided to the glass substrate by the engraving shaft. S3: When the rubber ring rolls on the surface of the glass substrate, the bottom end of the rubber ring is in a compressed state. At this time, the outer side of the rotating shaft touches the surface of the glass substrate. The rolling of the rubber ring on the surface of the glass substrate will cause the slurry to be guided from the discharge port to the outer side of the rotating shaft, and then transferred to the surface of the glass substrate for orderly engraving through the rotating shaft. S4: When the rubber ring rolls on the surface of the glass substrate, the central rod rotates between the fixed rod and the support rod. When the force plate squeezes the fixed rod, the central rod generates an upward force under the pressure of the force plate, and the bearing ring on the outside of the central rod compresses the spring rod upward. As a result, the central rod drives the rotating shaft to move upward, so that the rotating shaft is separated from the contact with the surface of the glass substrate.

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