Constant tension control light guide plate roll-to-roll coating equipment

Abstract

The utility model discloses a light guide plate roll to roll coating equipment of constant tension control belongs to roll to roll coating equipment technical field, including fixed base, the left side fixed mounting of fixed base has the supporting plate, the top fixed mounting of supporting plate has the mounting bracket, be provided with constant tension control adjusting assembly on fixed base, supporting plate and mounting bracket, the mounting plate fixed mounting is in the output of first electric telescopic handle, and constant tension control adjusting assembly drives mounting plate to go up and down through first electric telescopic handle, and the elastic buffer structure of cooperation slide bar and spring can respond to the change of substrate roll diameter and coating speed fluctuation in real time, pressure sensor real -time monitoring tension adjusting roller and feedback the pressure that suffers, can effectively reduce tension deviation, satisfy the requirement of high -precision coating to tension stability, the elasticity of spring telescopic can absorb instantaneous tension impact, avoid substrate and produce tensile deformation or wrinkle because of tension mutation.

Description

Technical Field

[0001] This utility model relates to the technical field of roll-to-roll coating equipment, specifically to a roll-to-roll coating equipment for light guide plates with constant tension control. Background Technology

[0002] As a core component of display devices, the surface coating quality of the light guide plate directly affects the light transmission efficiency and display uniformity. Roll-to-roll coating technology, due to its advantages of continuous operation and high efficiency, has become the mainstream method for large-scale production of light guide plates. However, this process requires extremely high precision in tension control: if the tension is too low, the light guide plate substrate is prone to wrinkles and misalignment, resulting in uneven coating thickness; if the tension is too high, it may cause tensile deformation of the substrate, damaging the optical performance of the light guide plate. Existing roll-to-roll coating equipment has many limitations: tension control response is lagging, and traditional mechanical tension adjustment methods are difficult to cope with dynamic interferences such as changes in substrate roll diameter and coating speed fluctuations, resulting in large tension deviations and failing to meet the requirements of high-precision coating; substrate guiding stability is insufficient, and coating position deviations are easily caused by lateral offset during high-speed transmission, which has a significant impact on large-size light guide plates; there is a lack of effective substrate surface cleaning pretreatment, and the adhering dust and oil will affect the adhesion of the coating layer and reduce the product qualification rate. Therefore, this device provides a roll-to-roll coating equipment for light guide plates with constant tension control. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a constant tension controlled roll-to-roll coating device for light guide plates, thereby solving the aforementioned technical problems.

[0004] A roll-to-roll coating device for light guide plates with constant tension control includes a fixed base, a support plate fixedly installed on the left side of the fixed base, and a mounting frame fixedly installed on the top of the support plate. A constant tension control adjustment component is provided on the fixed base, the support plate, and the mounting frame. The constant tension control and adjustment assembly includes a first electric telescopic rod, a mounting plate, a slide rod, a spring, a fixing frame, a tension adjusting roller, and a pressure sensor. The first electric telescopic rod is fixedly installed on the top of the mounting frame, the mounting plate is fixedly installed on the output end of the first electric telescopic rod, the slide rod is slidably installed on the four inner corners of the mounting plate, the spring is fixedly installed on the bottom of the mounting plate, the fixing frame is fixedly installed on the bottom of the slide rod, one end of the spring is fixedly installed on the top of the fixing frame, the tension adjusting roller is rotatably installed on the inner side of the fixing frame, and the pressure sensor is fixedly installed on the fixing frame.

[0005] Preferably, an extension plate is fixedly installed on the left side of the mounting frame, an electric guide rail is fixedly installed on the top of the fixing seat, a dust collection box is fixedly installed on the front side of the fixing seat, and a coating processing drying assembly is provided on the mounting frame, the extension plate, the electric guide rail and the dust collection box.

[0006] Preferably, the coating and drying assembly includes a motor, a bidirectional lead screw, a guide rod, and an L-shaped guide frame. The motor is fixedly installed on the inner wall of one side of the fixed base, the bidirectional lead screw is fixedly installed on the output end of the motor, the guide rod is fixedly installed on the inner side of the fixed base, and the L-shaped guide frame is threaded on the outer side of the bidirectional lead screw and slidably installed on the left and right sides of the outer side of the guide rod.

[0007] Preferably, the coating and drying assembly further includes a second electric telescopic rod, a connecting frame, a coating roller, and a coating trough. The second electric telescopic rod is fixedly installed on the top of the mounting frame, the connecting frame is fixedly installed on the output end of the second electric telescopic rod, the coating roller is rotatably installed on the inner side of the connecting frame, and the coating trough is formed on the coating roller.

[0008] Preferably, the coating drying assembly further includes an extension frame, a third electric telescopic rod, and a cleaning scraper. The extension frame is fixedly installed on one side of the connecting frame, the third electric telescopic rod is fixedly installed on one side of the extension frame, and the cleaning scraper is fixedly installed at the output end of the third electric telescopic rod. The cleaning scraper abuts against the coating tank.

[0009] Preferably, the coating and drying assembly further includes a ventilation hole, a heating resistor, and a fan. The ventilation hole is located on the top of the extension plate, the heating resistor is fixedly mounted on the extension plate, and the fan is fixedly mounted on the top of the extension plate.

[0010] Preferably, the coating and drying assembly further includes a movable frame, a cleaning roller, a dust pump, and a dust suction pipe. The movable frame is slidably mounted on an electric guide rail. The cleaning roller is rotatably mounted inside the dust suction pipe and the fixed base. The dust pump is fixedly mounted on one side of the dust collection box, and the dust suction pipe is fixedly mounted on the top of the dust collection box.

[0011] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects: 1. The constant tension control and adjustment component drives the mounting plate to rise and fall through the first electric telescopic rod. With the elastic buffer structure of the slide rod and spring, it can respond in real time to changes in substrate roll diameter and coating speed fluctuations. The pressure sensor monitors the pressure on the tension adjustment roller in real time and provides feedback, which can effectively reduce tension deviation and meet the requirements of high-precision coating for tension stability. The elastic extension and contraction of the spring can absorb instantaneous tension impact and prevent the substrate from being stretched or wrinkled due to sudden tension changes. II. In the coating and drying assembly, a motor drives a bidirectional lead screw to rotate, causing an L-shaped guide frame to move synchronously in the opposite direction along the guide rod. The guide spacing can be precisely adjusted according to the width of the light guide plate. The L-shaped guide frame provides double restraint on the substrate from the side and bottom, and together with the flat transmission of the tension adjusting roller, it effectively prevents lateral deviation during high-speed operation. Especially for large-sized light guide plates, it can reduce coating position deviation and solve the coating misalignment problem caused by unstable guidance in traditional equipment. When the moving frame slides along the electric guide rail, the cleaning roller first performs physical cleaning on the substrate surface to remove larger particulate impurities. The dust pump sucks the dust and debris generated during cleaning into the dust collection box through the dust collection pipe, achieving dust-free pretreatment. Compared with traditional no-cleaning designs, it can improve the cleanliness of the substrate surface, enhance the adhesion of the coating layer, improve the product qualification rate, and reduce defects such as coating peeling and bubbles caused by impurities. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the first electric telescopic rod and mounting plate in this utility model; Figure 3 This is a partial three-dimensional structural diagram of the tension adjusting roller and pressure sensor in this utility model. Figure 4 This is a partial structural diagram of the L-shaped guide frame and guide rod in this utility model.

[0013] Figure Labels

[0014] 1. Constant tension control and adjustment assembly; 2. Coating and drying assembly; 3. Fixing base; 4. Support plate; 5. Mounting bracket; 6. Extension plate; 7. Electric guide rail; 8. Dust collection box; 12. Electric telescopic rod; 13. Mounting plate; 14. Slide rod; 15. Spring; 16. Fixing frame; 17. Tension adjusting roller; 18. Pressure sensor; 19. Motor; 20. Double-acting lead screw; 21. Guide rod; 22. L-shaped guide frame; 23. Second electric telescopic rod; 24. Connecting frame; 25. Coating roller; 26. Paint tank; 27. Extension frame; 28. Third electric telescopic rod; 29. ​​Cleaning scraper; 30. Ventilation hole; 31. Heating resistor; 32. Fan; 33. Moving frame; 34. Sweeping roller; 35. Dust pump; 36. Dust suction pipe. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] The following is in conjunction with the appendix Figure 1-4 This document provides a detailed description of the technical solutions provided in each embodiment of the present invention.

[0017] This utility model embodiment provides a roll-to-roll coating equipment for light guide plates with constant tension control, including a fixed base 3, a support plate 4 fixedly installed on the left side of the fixed base 3, a mounting frame 5 fixedly installed on the top of the support plate 4, and a constant tension control adjustment component 1 provided on the fixed base 3, the support plate 4 and the mounting frame 5. The constant tension control and adjustment assembly 1 includes a first electric telescopic rod 11, a mounting plate 12, a slide rod 13, a spring 14, a fixing frame 15, a tension adjusting roller 16, and a pressure sensor 17. The first electric telescopic rod 11 is fixedly installed on the top of the mounting frame 5. The mounting plate 12 is fixedly installed on the output end of the first electric telescopic rod 11. The slide rod 13 is slidably installed on the four inner corners of the mounting plate 12. The spring 14 is fixedly installed on the bottom of the mounting plate 12. The fixing frame 15 is fixedly installed on the bottom of the slide rod 13. One end of the spring 14 is fixedly installed on the top of the fixing frame 15. The tension adjusting roller 16 is rotatably installed on the inner side of the fixing frame 15. The pressure sensor 17 is fixedly installed on the fixing frame 15.

[0018] Furthermore, the constant tension control adjustment component 1 drives the mounting plate 12 to rise and fall via the first electric telescopic rod 11. In conjunction with the elastic buffer structure of the slide rod 13 and the spring 14, it can respond in real time to changes in the substrate roll diameter and fluctuations in the coating speed. The pressure sensor 17 monitors and provides feedback on the pressure on the tension adjustment roller 16 in real time, which can effectively reduce tension deviation and meet the requirements of high-precision coating for tension stability. The elastic extension and contraction of the spring 14 can absorb instantaneous tension impacts and prevent the substrate from being stretched or wrinkled due to sudden tension changes.

[0019] In a further preferred embodiment of this utility model, an extension plate 6 is fixedly installed on the left side of the mounting frame 5, an electric guide rail 7 is fixedly installed on the top of the fixing seat 3, a dust collection box 8 is fixedly installed on the front side of the fixing seat 3, and a coating processing drying assembly 2 is provided on the mounting frame 5, the extension plate 6, the electric guide rail 7 and the dust collection box 8.

[0020] In a further preferred embodiment of this utility model, the coating and drying assembly 2 includes a motor 19, a bidirectional lead screw 20, a guide rod 21, and an L-shaped guide frame 22. The motor 19 is fixedly installed on the inner wall of one side of the fixed base 3, the bidirectional lead screw 20 is fixedly installed on the output end of the motor 19, the guide rod 21 is fixedly installed on the inner side of the fixed base 3, and the L-shaped guide frame 22 is threaded on the outer side of the bidirectional lead screw 20 and slidably installed on the left and right sides of the outer side of the guide rod 21.

[0021] Furthermore, in the coating and drying assembly 2, the motor 19 drives the bidirectional lead screw 20 to rotate, which in turn drives the L-shaped guide frame 22 to move synchronously in the opposite direction along the guide rod 21. The guide spacing can be precisely adjusted according to the width of the light guide plate. The L-shaped guide frame 22 forms a double limit on the substrate from the side and bottom. With the flat transmission of the tension adjusting roller 16, it effectively prevents side deviation during high-speed operation. Especially for large-size light guide plates, it can reduce coating position deviation and solve the coating misalignment problem caused by unstable guidance in traditional equipment.

[0022] In a further preferred embodiment of the present invention, the coating and drying assembly 2 further includes a second electric telescopic rod 23, a connecting frame 24, a coating roller 25, and a coating trough 26. The second electric telescopic rod 23 is fixedly installed on the top of the mounting frame 5, the connecting frame 24 is fixedly installed on the output end of the second electric telescopic rod 23, the coating roller 25 is rotatably installed on the inner side of the connecting frame 24, and the coating trough 26 is formed on the coating roller 25.

[0023] In a further preferred embodiment of the present invention, the coating and drying assembly 2 further includes an extension frame 27, a third electric telescopic rod 28, and a cleaning scraper 29. The extension frame 27 is fixedly installed on one side of the connecting frame 24, the third electric telescopic rod 28 is fixedly installed on one side of the extension frame 27, and the cleaning scraper 29 is fixedly installed at the output end of the third electric telescopic rod 28. The cleaning scraper 29 abuts against the coating tank 26.

[0024] Furthermore, the second electric telescopic rod 23 drives the coating roller 25 to rise and fall, which can precisely adjust the coating thickness; the third electric telescopic rod 28 drives the cleaning scraper 29 to fit with the paint tank 26, and removes residual paint in real time during the coating gap, so as to avoid the dried paint affecting the uniformity of the next coating; this linkage design can control the coating amount error, ensure the uniformity of the light guide plate coating thickness, and improve the uniformity of light transmission.

[0025] In a further preferred embodiment of the present invention, the coating and drying assembly 2 further includes a ventilation hole 30, a heating resistor 31, and a fan 32. The ventilation hole 30 is opened on the top of the extension plate 6, the heating resistor 31 is fixedly installed on the extension plate 6, and the fan 32 is fixedly installed on the top of the extension plate 6.

[0026] Furthermore, the heating resistor 31 on the extension plate 6 generates heat, and the fan 32 forms a hot air circulation through the ventilation hole 30 to quickly dry the coated substrate; the temperature can be adjusted in conjunction with the tension controller to adapt to the drying requirements of different coatings, shorten the drying time, and increase the speed of the production line; at the same time, the hot air circulation design can improve the drying uniformity and avoid coating discoloration or cracking caused by local overheating.

[0027] In a further preferred embodiment of the present invention, the coating and drying assembly 2 further includes a movable frame 33, a cleaning roller 34, a dust pump 35, and a dust suction pipe 36. The movable frame 33 is slidably mounted on the electric guide rail 7. The cleaning roller 34 is rotatably mounted on the inner side of the dust suction pipe 36 and the fixed seat 3. The dust pump 35 is fixedly mounted on one side of the dust suction box 8. The dust suction pipe 36 is fixedly mounted on the top of the dust suction box 8.

[0028] Furthermore, when the moving frame 33 slides along the electric guide rail 7, the cleaning roller 34 first performs physical cleaning on the substrate surface to remove larger particulate impurities; the dust pump 35 sucks the dust and debris generated during cleaning into the dust collection box 8 through the dust collection pipe 36 to achieve dust-free pretreatment; compared with the traditional no-cleaning design, it can improve the cleanliness of the substrate surface, enhance the adhesion of the coating layer, improve the product qualification rate, and reduce defects such as coating peeling and bubbles caused by impurities.

[0029] Specifically, the constant tension control adjustment component 1 drives the mounting plate 12 to rise and fall via the first electric telescopic rod 11. In conjunction with the elastic buffer structure of the slide rod 13 and the spring 14, it can respond in real time to changes in the substrate roll diameter and fluctuations in the coating speed. The pressure sensor 17 monitors and provides feedback on the pressure on the tension adjustment roller 16 in real time, which can effectively reduce tension deviation and meet the requirements of high-precision coating for tension stability. The elastic extension and contraction of the spring 14 can absorb instantaneous tension impacts and prevent the substrate from being stretched or wrinkled due to sudden tension changes. In the coating and drying assembly 2, the motor 19 drives the bidirectional lead screw 20 to rotate, which in turn drives the L-shaped guide frame 22 to move synchronously in the opposite direction along the guide rod 21. The guide spacing can be precisely adjusted according to the width of the light guide plate. The L-shaped guide frame 22 forms a double limit on the substrate from the side and bottom. With the flat transmission of the tension adjusting roller 16, it effectively prevents side deviation during high-speed operation. Especially for large-size light guide plates, it can reduce coating position deviation and solve the coating misalignment problem caused by unstable guidance in traditional equipment. When the moving frame 33 slides along the electric guide rail 7, the cleaning roller 34 first performs physical cleaning on the surface of the substrate to remove larger particulate impurities. The dust pump 35 sucks the dust and debris generated during cleaning into the dust collection box 8 through the dust collection pipe 36 to achieve dust-free pretreatment. Compared with the traditional no-cleaning design, it can improve the cleanliness of the substrate surface, enhance the adhesion of the coating layer, improve the product qualification rate, and reduce defects such as coating peeling and bubbles caused by impurities. The second electric telescopic rod 23 drives the coating roller 25 to rise and fall, allowing for precise adjustment of the coating thickness. The third electric telescopic rod 28 drives the cleaning scraper 29 to fit against the paint tank 26, removing residual paint in real time during the coating interval to prevent dried paint from affecting the uniformity of the next coating. This linkage design can control coating amount error, ensure consistent coating thickness of the light guide plate, and improve the uniformity of light transmission. The heating resistor 31 on the extension plate 6 generates heat, and the fan 32 forms a hot air circulation through the ventilation holes 30 to quickly dry the coated substrate. The temperature can be adjusted in linkage with the tension controller to adapt to the drying requirements of different coatings, shorten drying time, and increase production line speed. At the same time, the hot air circulation design can improve drying uniformity and avoid coating discoloration or cracking caused by local overheating. The first electric telescopic rod 11, the second electric telescopic rod 23, and the third electric telescopic rod 28 can be precisely controlled by a touch system to adapt to light guide plate substrates of different thicknesses; the L-shaped guide frame 22 has a wide adjustment range and is compatible with products of various sizes and specifications; the equipment can meet the production needs of different models of light guide plates without major modifications, reducing the cost of equipment replacement for enterprises and improving the flexibility of the production line.

[0030] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A roll-to-roll coating equipment for light guide plates with constant tension control, characterized in that: include; A fixed seat (3) is provided with a support plate (4) fixedly installed on the left side of the fixed seat (3), and a mounting bracket (5) is fixedly installed on the top of the support plate (4). A constant tension control adjustment component (1) is provided on the fixed seat (3), the support plate (4) and the mounting bracket (5). The constant tension control and adjustment assembly (1) includes a first electric telescopic rod (11), a mounting plate (12), a slide rod (13), a spring (14), a fixing frame (15), a tension adjusting roller (16), and a pressure sensor (17). The first electric telescopic rod (11) is fixedly installed on the top of the mounting frame (5). The mounting plate (12) is fixedly installed on the output end of the first electric telescopic rod (11). The slide rod (13) is slidably installed on the four inner corners of the mounting plate (12). The spring (14) is fixedly installed on the bottom of the mounting plate (12). The fixing frame (15) is fixedly installed on the bottom of the slide rod (13). One end of the spring (14) is fixedly installed on the top of the fixing frame (15). The tension adjusting roller (16) is rotatably installed on the inner side of the fixing frame (15). The pressure sensor (17) is fixedly installed on the fixing frame (15).

2. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 1, characterized in that: An extension plate (6) is fixedly installed on the left side of the mounting bracket (5), an electric guide rail (7) is fixedly installed on the top of the fixed seat (3), and a dust collection box (8) is fixedly installed on the front side of the fixed seat (3). A coating processing drying assembly (2) is provided on the mounting bracket (5), the extension plate (6), the electric guide rail (7) and the dust collection box (8).

3. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 2, characterized in that: The coating and drying assembly (2) includes a motor (19), a bidirectional lead screw (20), a guide rod (21), and an L-shaped guide frame (22). The motor (19) is fixedly installed on the inner wall of one side of the fixed base (3). The bidirectional lead screw (20) is fixedly installed at the output end of the motor (19). The guide rod (21) is fixedly installed on the inner side of the fixed base (3). The L-shaped guide frame (22) is threaded on the outer side of the bidirectional lead screw (20) and slidably installed on the left and right sides of the outer side of the guide rod (21).

4. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 3, characterized in that: The coating and drying assembly (2) further includes a second electric telescopic rod (23), a connecting frame (24), a coating roller (25), and a coating tank (26). The second electric telescopic rod (23) is fixedly installed on the top of the mounting frame (5). The connecting frame (24) is fixedly installed on the output end of the second electric telescopic rod (23). The coating roller (25) is rotatably installed on the inner side of the connecting frame (24). The coating tank (26) is opened on the coating roller (25).

5. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 4, characterized in that: The coating drying assembly (2) further includes an extension frame (27), a third electric telescopic rod (28), and a cleaning scraper (29). The extension frame (27) is fixedly installed on one side of the connecting frame (24), the third electric telescopic rod (28) is fixedly installed on one side of the extension frame (27), and the cleaning scraper (29) is fixedly installed at the output end of the third electric telescopic rod (28). The cleaning scraper (29) abuts against the coating tank (26).

6. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 5, characterized in that: The coating and drying assembly (2) further includes a ventilation hole (30), a heating resistor (31), and a fan (32). The ventilation hole (30) is located on the top of the extension plate (6), the heating resistor (31) is fixedly installed on the extension plate (6), and the fan (32) is fixedly installed on the top of the extension plate (6).

7. The constant tension controlled roll-to-roll coating equipment for light guide plates as described in claim 6, characterized in that: The coating and drying assembly (2) also includes a movable frame (33), a cleaning roller (34), a vacuum pump (35), and a vacuum pipe (36). The movable frame (33) is slidably mounted on an electric guide rail (7). The cleaning roller (34) is rotatably mounted on the inside of the vacuum pipe (36) and the fixed seat (3). The vacuum pump (35) is fixedly mounted on one side of the vacuum box (8). The vacuum pipe (36) is fixedly mounted on the top of the vacuum box (8).

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