Polarizing film hole detection device

Abstract

This application relates to the field of hole defect detection equipment, and more particularly to a hole detection device for polarizers, comprising a frame, with multiple adsorption jigs for gripping material slidably connected to the top of the frame. Along the movement path of the adsorption jigs, the frame is sequentially equipped with a feeding assembly, a double-layer detection assembly, a double-layer separation assembly, a hole detection assembly, and a material conveying assembly. By adding a double-layer separation assembly after the double-layer detection assembly, the bonded double-layer polarizers are separated, allowing previously discarded double-layer polarizers to enter the subsequent hole detection stage after separation. This application has the effect of improving the hole detection pass rate of polarizers and saving raw materials.

Description

Technical Field

[0001] This application relates to the field of hole defect detection equipment, and in particular to a polarizer hole detection device. Background Technology

[0002] Polarizing film is an important component of LCD displays. During the production process, holes need to be drilled in the polarizing film before installation. Since defects will be generated at the edges of the holes after drilling, the polarizing film products will be unqualified. Therefore, it is necessary to inspect the holes in the polarizing film after drilling.

[0003] Existing polarizer hole detection equipment can be found in patent document CN216763631U, which discloses a multi-station polarizer hole detection device, including a feeding and conveying assembly, a double-sheet rejection assembly, a detection adsorption fixture assembly, and a discharging and conveying assembly. Because multiple polarizers are stacked during feeding, static electricity can easily be generated between two polarizers, causing them to stick together. The aforementioned technical solution uses a double-sheet rejection assembly to sort and reject double-layer polarizers from the product, only conveying single-layer polarizers to the subsequent hole detection station.

[0004] However, the double-layer polarizer in the above technical solution was directly rejected without participating in the subsequent hole detection process, resulting in a low product qualification rate and a waste of raw materials. Summary of the Invention

[0005] In order to improve the pass rate of polarizer hole detection and save product raw materials, this application provides a polarizer hole detection device.

[0006] The polarizer hole detection device provided in this application adopts the following technical solution:

[0007] A polarizer hole detection device includes a frame on which multiple adsorption fixtures for gripping materials are slidably connected. Along the moving path of the adsorption fixtures, the frame is sequentially provided with a feeding component, a dual-plate detection component, a dual-plate separation component, a hole detection component, and a material conveying component.

[0008] By adopting the above technical solution, multiple perforated polarizing films to be tested are stacked on the feeding assembly. The adsorption fixture picks up the topmost polarizing film and moves it above the double-film detection assembly. Since a double-film separation assembly is added at the rear of the double-film detection assembly, the double-layer polarizing films that are bonded together can be separated. This allows the previously discarded double-layer polarizing films to enter the subsequent hole detection stage after separation, thereby improving the pass rate of hole detection of polarizing films and saving raw materials. The hole detection assembly is used to detect data such as the location, size, and cutting condition of the mounting holes on the polarizing films. The material transfer assembly is used to transfer the qualified polarizing films to the subsequent processing station.

[0009] Optionally, the material conveying assembly includes two parallel conveyor belts, and the dual-plate separation assembly is located between the two conveyor belts; the hole detection assembly is fixed to the top of the frame and is used to detect the material on the conveyor belts.

[0010] The dual-plate separation assembly includes a lifting platform, a first suction cup, and a first vacuum generator. The first suction cup is embedded in the surface of the lifting platform, and the first vacuum generator is installed on the side of the lifting platform opposite to the first suction cup. The first suction cup and the first vacuum generator are connected by a pipeline, and a space is left between the two conveyor belts for the lifting platform to move freely up and down.

[0011] By adopting the above technical solution, when separating the two sheets, the adsorption fixture adsorbs the upper polarizer to fix the two polarizers. The lifting platform rises so that the first suction cup abuts against the lower polarizer. The first vacuum generator, which is connected to the first suction cup, causes the first suction cup to generate suction on the lower polarizer. Then the lifting platform descends, and the lower polarizer descends with the first suction cup to the height of the conveyor belt. It is then conveyed by the conveyor belt to the position directly below the hole detection component for subsequent hole detection.

[0012] Applying suction forces in opposite directions and perpendicular to the polarizer plane to the upper and lower polarizer layers can reduce friction between the two polarizers when separating them, thus reducing the possibility of damage to the polarizer surface.

[0013] Optionally, the material conveying assembly may further include an auxiliary track located between the two conveyor belts, the auxiliary track being synchronously driven with the conveyor belts.

[0014] By adopting the above technical solution, when materials are conveyed, the two ends of the polarizer contact the conveyor belt, and the middle part is prone to warping and deformation due to gravity. The auxiliary track supports the polarizer from the middle, which can reduce the possibility of polarizer deformation during material transportation.

[0015] Optionally, the feeding assembly includes a lead screw, a support plate, and a motor. One end of the lead screw is vertically fixed to the ground, and the motor is fixed to the top of the frame. The other end of the lead screw passes through the frame and is coaxially fixed to the output shaft of the motor. There are at least two lead screws, and each motor corresponds to one of the lead screws. The motor is used to drive the lead screw to rotate. The support plate is threadedly connected to the lead screw, and the support plate can move up and down along the lead screw.

[0016] By adopting the above technical solution, materials are stacked on the pallet by manual feeding. The pallet climbs along the screw to bring the materials close to the adsorption fixture. Since the threads on the screw are evenly spaced, the single lifting height of the pallet can be controlled by adjusting the thread density of the screw. After the adsorption fixture grabs the top polarizer, the pallet climbs along the screw by a distance equal to the thickness of one polarizer, making it easier for the adsorption fixture to grab the next polarizer.

[0017] Optionally, the adsorption fixture includes a telescopic rod, a mounting plate, a second suction cup, and a second vacuum generator. One end of the telescopic rod is slidably connected to the frame, and the other end of the telescopic rod is vertically fixed to the mounting plate. The second suction cup is embedded in the side of the mounting plate opposite to the telescopic rod. The second vacuum generator is fixedly connected to the mounting plate, and the second suction cup and the second vacuum generator are connected through a pipeline.

[0018] By adopting the above technical solution, the second vacuum generator connected to the second suction cup can flexibly control the suction force of the second suction cup, making it easier to pick up and put down materials; the second suction cup is embedded on the surface of the mounting plate, and the mounting plate is flush with the edge of the suction cup, reducing the possibility of warping and deformation of the polarizer, making the polarizer adsorbed on the second suction cup flatter; the telescopic rod raises and lowers the suction cup, making it easy to grab materials of different heights. When placing the polarizer, the telescopic rod can release the polarizer when the suction cup is close to the height of the conveyor belt, so as to prevent the polarizer from falling from a height and being damaged.

[0019] Optionally, the frame is provided with a rotary slide rail, and the adsorption fixture is slidably connected to the rotary slide rail, and the adsorption fixture can move unidirectionally between the feeding component and the material conveying component.

[0020] By adopting the above technical solution, the adsorption fixture moves unidirectionally along the rotary slide rail, making it easy for the empty adsorption fixture to return to the feeding assembly.

[0021] Optionally, the above-mentioned polarizer hole detection device further includes a defective product conveying component, which is arranged parallel to the material conveying component and has opposite transmission directions. When the adsorption fixture moves away from the material conveying component, it passes directly above the defective product conveying component.

[0022] By adopting the above technical solution, a defective product conveying component is set below the path of the adsorption fixture returning to the feeding component. The conveying direction of the defective product conveying component is the same as the return direction of the adsorption fixture. After the hole detection, the adsorption fixture grabs the defective product and returns to the feeding component along the rotary slide rail. During the return, the adsorption fixture passes through the defective product conveying component and places the defective product on the defective product conveying component.

[0023] By utilizing the characteristic that the adsorption fixture moves back and forth in opposite directions on the rotary slide rail, a defective product conveying component is set up in the opposite direction to the material conveying component. This allows qualified products and defective products to be conveyed in opposite directions, and defective products can be sorted while the adsorption fixture is being recovered, thereby simplifying the process.

[0024] Optionally, the dual-chip detection assembly is a reflective photoelectric sensor.

[0025] By adopting the above technical solution, the transmitter and receiver of the reflective photoelectric sensor are located in the same device, which can save installation and usage space.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By adding a double-layer separation component to the rear position of the double-layer detection component, the double-layer polarizer that is bonded together can be separated first. Then, the adsorption fixture places the two separated polarizers on the material conveying component. This allows the originally discarded double-layer polarizers to enter the subsequent hole detection stage after separation, thereby saving product raw materials and indirectly improving the hole detection pass rate of the polarizers.

[0028] 2. The adsorption fixture with double-layer polarizers is moved directly above the lifting platform. The first suction cup adsorbs the lower polarizer. Then the lifting platform is lowered. By applying suction forces in opposite directions and perpendicular to the polarizer plane to the upper and lower polarizers respectively, the friction between the upper and lower polarizers can be reduced when separating the polarizers, thereby reducing the possibility of damage to the polarizer surface. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the polarizer hole detection device according to an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the polarizer hole detection device from another perspective in the embodiments of this application.

[0031] Figure 3 This is a schematic diagram of the structure of the dual-piece separation component in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Polarizing film; 1. Frame; 11. Top cover; 12. Base; 2. Adsorption fixture; 21. Telescopic rod; 22. Mounting plate; 23. Second suction cup; 24. Second vacuum generator; 3. Feeding assembly; 31. Lead screw; 32. Support plate; 33. Motor; 34. Support rod; 4. Dual-plate detection assembly; 41. Reflective photoelectric sensor; 5. Dual-plate separation assembly; 51. Lifting platform; 52. First suction cup; 53. First vacuum generator; 6. Hole detection assembly; 7. Material conveying assembly; 71. Conveyor belt; 72. Auxiliary track; 8. Rotary slide rail; 9. Defective product conveying assembly. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] This application discloses a polarizer hole detection device.

[0036] Reference Figure 1 The polarizer hole detection device includes a frame 1, with multiple adsorption fixtures 2 for gripping materials slidably connected to the top of the frame 1. Along the moving path of the adsorption fixtures 2, the frame 1 is sequentially equipped with a feeding assembly 3, a dual-plate detection assembly 4, a dual-plate separation assembly 5, a hole detection assembly 6, and a material conveying assembly 7. The drive components in each of these parts are electrically connected to a PLC controller (not shown in the figure), and the entire device operates under automated control.

[0037] By adding a dual-layer separation component 5 to the rear position of the dual-layer detection component 4, the bonded dual-layer polarizer 10 can be separated, allowing the originally discarded dual-layer polarizer 10 to enter the subsequent hole detection stage after separation, thereby improving the hole detection pass rate of the polarizer 10 and saving product raw materials.

[0038] Reference Figure 1 , Figure 2 The frame 1 includes a top cover 11 and two bases 12, which are fixedly connected by a bracket. The two bases 12 are rectangular in shape and arranged in a staggered parallel configuration. One base 12 is used to mount a material conveying assembly 7 to convey qualified polarizers 10; the other base 12 is equipped with a defective product conveying assembly 9, which moves in the opposite direction to the material conveying assembly 7, thus conveying qualified and defective products in opposite directions, facilitating product sorting. A rectangular platform plate extends from the end of the base 12 of the material conveying assembly 7, and a dual-piece detection assembly 4 is fixedly placed on the platform plate. The dual-piece detection assembly 4 is preferably a reflective photoelectric sensor 41. Since the transmitter and receiver of the reflective photoelectric sensor 41 are located in the same device, it saves installation space.

[0039] Reference Figure 2A circular rotary slide rail 8 is fixedly installed on the downward-facing side of the top cover 11. The adsorption fixture 2 is slidably connected to the rotary slide rail 8. The PLC controller enables the adsorption fixture 2 to move unidirectionally along the rotary slide rail 8 between the feeding assembly 3 and the material conveying assembly 7, moving and picking up / placing the polarizer 10. The two ends of the rotary slide rail 8 are directly above the material conveying assembly 7 and the defective product conveying assembly 9, respectively. Utilizing the characteristic that the adsorption fixture 2 moves back and forth in opposite directions on the rotary slide rail 8, the adsorption fixture 2 can grab the defective products on the material conveying assembly 7 after the hole inspection is completed and place them on the defective product conveying assembly 9, so that qualified products and defective products are conveyed in opposite directions. While the adsorption fixture 2 moves towards the feeding assembly 3, it can sort defective products, thereby simplifying the process.

[0040] Reference Figure 1 The feeding assembly 3 is located on the side of the dual-plate detection assembly 4 away from the material conveying assembly 7. The feeding assembly 3 includes a lead screw 31, a support plate 32, and a motor 33. The motor 33 is fixedly installed on the top surface of the top cover 11 of the frame 1. The lead screw 31 is perpendicular to the ground. The top end of the lead screw 31 passes through the top cover 11 and is fixed coaxially with the output shaft of the motor 33. The bottom end is connected to the base 12 through a bearing. The support plate 32 is rectangular and is used to place the polarizer 10 to be tested. A positioning groove can be opened on the support plate 32 to limit the polarizer 10. There are mounting holes at all four corners of the support plate 32. The lead screw 31 is inserted into the mounting holes and threadedly connected to the support plate 32. In order to make the force on the support plate 32 more even, at least two lead screws 31 are provided. The motor 33 is set one-to-one with the lead screw 31. Here, ball screws 31 are preferred, and it is preferred that the two ball screws 31 are set at opposite corners of the support plate 32. The motor 33 drives the lead screw 31 to rotate synchronously, which enables the pallet 32 ​​to rise and fall vertically along the lead screw 31. A support rod 34 of the same height as the lead screw 31 is inserted into the mounting hole where the lead screw 31 is not installed. The top end of the support rod 34 is fixedly connected to the top cover 11 of the frame 1, and the bottom end is fixedly connected to the base 12, thereby making the pallet 32 ​​more stable.

[0041] The tray 32 climbs along the lead screw 31 to bring the polarizer 10 close to the adsorption fixture 2. Since the threads on the lead screw 31 are arranged at equal intervals, the single lifting height of the tray 32 can be controlled by adjusting the thread density of the lead screw 31. Whenever the adsorption fixture 2 grabs the uppermost polarizer 10, the tray 32 climbs along the lead screw 31 by the thickness of one polarizer 10, so that the adsorption fixture 2 can grab the next polarizer 10.

[0042] Reference Figure 1The material conveying assembly 7 includes two parallel conveyor belts 71. During material conveying, the two opposite sides of the polarizer 10 contact the two conveyor belts 71 respectively. The hole detection assembly 6 is fixed on the top cover 11 of the frame 1 and located directly above the material conveying assembly 7. It is used to detect the polarizer 10 on the conveyor belts 71 and feeds back data such as the detected mounting hole position, size, and cutting status to the control system to determine whether the product is qualified. To avoid the hole detection assembly 6 interfering with the movement of the adsorption fixture 2, an L-shaped plate can be used to suspend the hole detection assembly 6 on the top cover 11, thereby avoiding the movement path of the adsorption fixture 2. The double-plate separation assembly 5 passes through the gap between the two conveyor belts 71, facilitating the conveying of the separated polarizer 10 to the hole detection assembly 6. During material conveying, the two opposite sides of the polarizer 10 contact the two conveyor belts 71 respectively, while the middle of the polarizer 10 is prone to bending deformation due to gravity. Therefore, an auxiliary track 72 can be set between the two conveyor belts 71. The auxiliary track 72 is synchronously driven with the conveyor belts 71 and supports the polarizer 10 from the middle, which can reduce the possibility of deformation of the polarizer 10 during material transportation.

[0043] Reference Figure 1 , Figure 3 The dual-layer separation assembly 5 includes a lifting platform 51, a first suction cup 52, and a first vacuum generator 53. The lifting platform 51 is fixed to the ground and includes a panel, a lifting bracket, and a cylinder. The lifting bracket is tubular, with the panel vertically fixed to its top and the bottom connected to the cylinder. The first suction cup 52 is horizontally embedded in the center of the panel of the lifting platform 51. The first vacuum generator 53 is mounted on the side of the panel facing away from the first suction cup 52, and the first suction cup 52 and the first vacuum generator 53 are connected by a pipe. To enhance the fixing effect of the adsorption fixture 2 on the polarizer 10, two first suction cups 52 can be arranged side-by-side on the panel. Space is left between the two conveyor belts 71 for the lifting platform 51 to move freely up and down. As the adsorption fixture 2 moves above the dual-layer polarizer 10 in the dual-layer separation assembly 5, the bottom is subjected to downward suction from the first suction cup 52, and then the lifting platform 51 descends, thereby separating the two layers of polarizer 10. Applying suction forces in opposite directions and perpendicular to the plane of the polarizer 10 to the upper and lower polarizers 10 respectively can minimize the friction between the two polarizers 10 during separation and reduce the possibility of damage to the surface of the polarizer 10.

[0044] Reference Figure 2The adsorption fixture 2 includes a telescopic rod 21, a mounting plate 22, second suction cups 23, and a second vacuum generator 24. Two second suction cups 23 are embedded in the side of the mounting plate 22 opposite to the telescopic rod 21, making the polarizer 10 adsorbed on the second suction cups 23 flatter, thereby reducing the possibility of warping and deformation of the polarizer 10 under stress. The second vacuum generator 24 is fixedly connected to the mounting plate 22, and the second suction cups 23 are connected to the second vacuum generator 24 through pipelines. The top end of the telescopic rod 21 is slidably connected to the rotary slide rail 8, and the bottom end of the telescopic rod 21 is vertically fixed to the mounting plate 22. The telescopic rod 21 drives the suction cups to rise and fall via a cylinder, facilitating the gripping of materials at different heights. When placing the polarizer 10, the telescopic rod 21 allows the suction cups to approach the height of the conveyor belt 71 before releasing the polarizer 10, preventing it from falling and being damaged.

[0045] The implementation principle of the polarizer hole detection device in this application embodiment is as follows: The polarizer 10 to be tested is stacked on the tray 32. The motor 33 drives the lead screw 31 to rotate, so that the tray 32 climbs along the lead screw 31. The uppermost polarizer 10 abuts against the suction cup. The second vacuum generator 24 causes the second suction cup 23 to hold the polarizer 10 tightly. The adsorption fixture 2 moves along the rotary slide rail 8 toward the hole detection component 6. After being detected by the double-layer detection component 4, the double-layer polarizer 10 stays above the double-layer separation component 5 with the adsorption fixture 2. The lifting platform 51 rises so that the first suction cup 52 holds the lower polarizer 10 tightly. Then the lifting platform 51 descends, and the upper and lower polarizers 10 are subjected to opposite pulling forces, thus separating them. After the lower polarizer 10 descends with the first suction cup 52 to the height of the conveyor belt 71, it is conveyed by the conveyor belt 71 to the position directly below the hole detection component 6 for subsequent hole detection.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A polarizer hole detection device, comprising a frame (1), characterized in that: Multiple adsorption fixtures (2) for gripping materials are slidably connected to the frame (1). Along the moving path of the adsorption fixtures (2), the frame (1) is sequentially equipped with a feeding assembly (3), a double-plate detection assembly (4), a double-plate separation assembly (5), a hole detection assembly (6), and a material conveying assembly (7). The material conveying assembly (7) includes two parallel conveyor belts (71), and the double-plate separation assembly (5) is located between the two conveyor belts (71). The hole detection assembly (6) is fixed to the top of the frame (1) and is used to detect the hole in the material. The material on the conveyor belt (71) is inspected; the dual-plate separation assembly (5) includes a lifting platform (51), a first suction cup (52) and a first vacuum generator (53). The first suction cup (52) is embedded on the surface of the lifting platform (51), and the first vacuum generator (53) is installed on the side of the lifting platform (51) away from the first suction cup (52). The first suction cup (52) and the first vacuum generator (53) are connected by a pipeline. There is space between the two conveyor belts (71) for the lifting platform (51) to move freely up and down.

2. The polarizer hole detection device according to claim 1, characterized in that: The material conveying assembly (7) also includes an auxiliary track (72) located between the two conveyor belts (71), the auxiliary track (72) being synchronously driven with the conveyor belts (71).

3. The polarizer hole detection device according to claim 1, characterized in that: The feeding assembly (3) includes a lead screw (31), a support plate (32), and a motor (33). One end of the lead screw (31) is vertically fixed to the ground, and the motor (33) is fixed to the top of the frame (1). The other end of the lead screw (31) passes through the frame (1) and is coaxially fixed with the output shaft of the motor (33). There are at least two lead screws (31), and the motor (33) corresponds to the lead screw (31) one by one. The motor (33) is used to drive the lead screw (31) to rotate. The support plate (32) is threadedly connected to the lead screw (31), and the support plate (32) can move up and down along the lead screw (31).

4. The polarizer hole detection device according to claim 1, characterized in that: The adsorption fixture (2) includes a telescopic rod (21), a mounting plate (22), a second suction cup (23), and a second vacuum generator (24). One end of the telescopic rod (21) is slidably connected to the frame (1), and the other end of the telescopic rod (21) is vertically fixed to the mounting plate (22). The second suction cup (23) is embedded in the side of the mounting plate (22) away from the telescopic rod (21). The second vacuum generator (24) is fixedly connected to the mounting plate (22), and the second suction cup (23) and the second vacuum generator (24) are connected through a pipeline.

5. The polarizer hole detection device according to claim 1, characterized in that: The frame (1) is provided with a rotary slide rail (8), and the adsorption fixture (2) is slidably connected to the rotary slide rail (8). The adsorption fixture (2) can move unidirectionally between the feeding assembly (3) and the material conveying assembly (7).

6. The polarizer hole detection device according to claim 5, characterized in that: It also includes a defective product conveying component (9), which is arranged in parallel with the material conveying component (7) and has opposite transmission directions. When the adsorption fixture (2) moves away from the material conveying component (7), it passes directly above the defective product conveying component (9).

7. The polarizer hole detection device according to claim 1, characterized in that: The dual-chip detection component (4) is a reflective photoelectric sensor (41).

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