FPC appearance inspection device and FPC appearance inspection method

Abstract

The present invention relates to the field of FPC detection technology, and specifically to an FPC appearance detection device and an FPC appearance detection method, which include a first conveying mechanism, including a first guide rail and a first load-bearing platform sliding along the first guide rail; a second conveying mechanism, including a second load-bearing platform and a second guide rail parallel to the first guide rail, the second load-bearing platform is slidably connected to the second guide rail, and the first load-bearing platform and the second load-bearing platform are both used to carry products; a flipping mechanism is arranged between the first conveying mechanism and the second conveying mechanism, and is used to flip the front and back of the product; a first detection mechanism is used for high-precision detection of the product on the first load-bearing platform; the second detection mechanism is used for low-precision detection of the product on the second load-bearing platform. The present application balances the impact of the time difference of front and back detection, realizes efficient coordination of the detection process, avoids the problem of low detection efficiency caused by the difference in detection time, and enables the entire detection system to operate more stably and efficiently.

Description

Technical Field

[0001] The present invention relates to the technical field of FPC detection, and in particular to an FPC appearance detection device and an FPC appearance detection method. Background Art

[0002] In the electronics manufacturing industry, flexible printed circuits (FPCs) are widely used in various electronic products due to their thinness, lightness, and bendability. As electronic products move toward miniaturization and higher performance, the quality requirements for FPCs are becoming increasingly stringent. As a crucial step in ensuring product quality, FPC appearance inspection requires precise identification of various defects that may exist on both sides. Because the front of an FPC often houses complex circuit layouts, precision solder pads, and other critical structures that determine the electrical performance of electronic products, high-precision appearance inspection is required on the front to detect subtle defects such as broken wires, short circuits, and oxidized pads. The back of an FPC, on the other hand, has a relatively simple structure and focuses primarily on obvious cosmetic defects such as scratches and stains, requiring only low-precision inspection. This difference in inspection accuracy on both sides directly leads to differences in the time and complexity required for inspection.

[0003] At present, existing FPC appearance inspection equipment generally adopts a linear unidirectional inspection method. The equipment will inspect the front and back sides of the FPC in sequence according to a preset fixed order. In specific operation, the equipment first fixes the FPC in the inspection station and performs high-precision inspection on the front side. After completing the front side inspection, the FPC is flipped over and a low-precision inspection is performed on the back side. However, since the high-precision inspection of the front side involves complex image acquisition, algorithm analysis and other processes, the time required is significantly longer than the low-precision inspection of the back side. The difference in the time consumption of the front and back side inspections results in a large amount of waiting and idle time during the inspection process of the equipment, and the overall inspection efficiency is low, which makes it difficult to meet the needs of large-scale production for fast and efficient quality inspection. Summary of the Invention

[0004] The purpose of the present invention is to provide an FPC appearance inspection device and an FPC appearance inspection method to solve the problem of low efficiency of FPC appearance inspection in the prior art.

[0005] The technical solution of the present invention is: an FPC appearance inspection device, comprising: a first conveying mechanism, comprising a first guide rail and a first load-bearing platform sliding along the first guide rail; a second conveying mechanism, comprising a second load-bearing platform and a second guide rail parallel to the first guide rail, the second load-bearing platform is slidably connected to the second guide rail, and the first load-bearing platform and the second load-bearing platform are both used to carry products; a flipping mechanism, arranged between the first conveying mechanism and the second conveying mechanism, for flipping the front and back of the product; a first transporting mechanism, at least having a stroke of moving between the first conveying mechanism and the flipping mechanism to transfer the product; a second transporting mechanism, at least having a stroke of moving between the second conveying mechanism and the flipping mechanism to transfer the product; a first detection mechanism, arranged at the top of the first guide rail, for high-precision detection of the product on the first load-bearing platform; a second detection mechanism, arranged at the top of the second guide rail, for low-precision detection of the product on the second load-bearing platform.

[0006] Preferably, the first guide rail includes a first transfer section and a first detection section, the second guide rail includes a second transfer section and a second detection section, and the first transfer section, the flipping mechanism, and the second transfer section are arranged in sequence along the first direction; the FPC appearance inspection equipment includes a support frame spanning the first guide rail and the second guide rail along the first direction, the first transfer section and the second transfer section are located on the same side of the support frame, and the first detection section and the second detection section are located on the other side of the support frame; the first conveying mechanism and the second conveying mechanism are fixed to the side of the support frame facing the first transfer section, and the first detection mechanism and the second detection mechanism are fixed to the side of the support frame facing the second transfer section.

[0007] Preferably, the first conveying mechanism includes a first drive assembly and a first supporting plate, and the second conveying mechanism includes a second drive assembly and a second supporting plate. The first drive assembly and the second drive assembly are fixed on the same side of the support frame, and both have translational freedom along the first direction and the vertical direction; the travel range of the first drive assembly includes the flipping mechanism, the first transfer section, and the extension space of the first transfer section away from the flipping mechanism to transfer or load and unload products, and the travel range of the second drive assembly includes the flipping mechanism, the second transfer section, and the extension space of the first transfer section away from the flipping mechanism to transfer products or recycle unqualified products.

[0008] Preferably, the flipping mechanism includes a supporting frame and a flipping motor, the supporting frame is fixed to the output shaft of the flipping motor, and the supporting frame is provided with a first adsorption platform, a second adsorption platform and a third adsorption platform in sequence, the first adsorption platform and the third adsorption platform move toward the second adsorption platform to clamp the product, and are used to flip the front and back of two products at the same time.

[0009] Preferably, the first detection mechanism includes a first transmission assembly and a first camera, the first transmission assembly having freedom along the first direction is fixed to the support frame, the first camera is fixed at the output end of the first transmission assembly, the first transmission assembly drives the first camera to reciprocate along the first direction relative to the first detection section, the first support platform moves unidirectionally intermittently in the first detection section, and is used for high-precision detection of the front side of the product on the first support platform; the second detection mechanism includes a second transmission assembly and a second camera, the second transmission assembly having freedom along the first direction is fixed to the support frame, the second camera is fixed at the output end of the second transmission assembly, the second transmission assembly drives the second camera to reciprocate along the first direction relative to the second detection section, the second support platform moves unidirectionally intermittently in the second detection section, and is used for low-precision detection of the back side of the product on the second support platform.

[0010] Preferably, a first sealing and pressing mechanism is provided at the top of the first guide rail, the first sealing and pressing mechanism includes a first bracket and a first glass, the first bracket movably carries the first glass and moves in a vertical direction toward the first guide rail, so as to press the first glass cover or separate from the first supporting platform; a second sealing and pressing mechanism is provided at the top of the second guide rail, the second sealing and pressing mechanism includes a second bracket and a second glass, the second bracket movably carries the second glass and moves in a vertical direction toward the second guide rail, so as to press the second glass cover or separate from the second supporting platform.

[0011] Preferably, the first detection section has a first covering section extending in a direction away from the first transfer section, and the first sealing mechanism is located at the top of the first covering section; the second detection section has a second covering section extending in a direction away from the second transfer section, and the second sealing mechanism is located at the top of the second covering section.

[0012] Preferably, the first sealing and pressing mechanism is located at the top of the first transfer section, and the second sealing and pressing mechanism is located at the top of the second transfer section.

[0013] This application also provides a FPC appearance detection method

[0014] In a first time period, a first product faces upward and arrives at a first loading platform;

[0015] During the second time period, the first product arrives at the first inspection section and the inspection begins; at the same time, the second product arrives at the second loading platform with the reverse side facing upwards;

[0016] During the third time period, the second product arrives at the second detection section and the detection begins;

[0017] During the fourth time period, the first and second products continue to be tested synchronously until the testing is completed. At this point, the high-precision testing time for the front side of the first product is the sum of the third and fourth time periods, and the low-precision testing time for the back side of the second product is the fourth time period.

[0018] During the fifth time period, the first product and the second product are turned over synchronously, and the first product with the reverse side facing upward is transferred to the second inspection section, and the second product with the front side facing upward is transferred to the first inspection section;

[0019] During the sixth time period, the first and second products are tested simultaneously. The low-precision test of the first product is completed first, and the product is removed for unloading.

[0020] During the seventh time period, the high-precision inspection of the second product is completed and the blanking is removed; at this point, the low-precision inspection time for the back of the first product is the sixth time period, and the high-precision inspection time for the front of the second product is the sum of the sixth time period and the seventh time period.

[0021] Preferably, S1: within a first time period, the first transport mechanism absorbs the first product and transfers it to the first carrying platform located in the first transfer section, with the front side of the first product facing upwards;

[0022] S2: During the second time period, the first carrier moves from the first transfer section to the first covering section. The first covering mechanism covers the first glass on the first carrier. The first carrier then moves to the first inspection section. Simultaneously, the first transport mechanism adsorbs the second product and transfers it to the third adsorption station. The second transport mechanism transfers the second product on the third adsorption station to the second carrier on the second transfer section, with the reverse side of the second product facing upwards.

[0023] S3: During a third time period, the first inspection mechanism performs high-precision inspection on the front surface of the first product located in the first inspection section. Simultaneously, the second carrier moves the second product to the second covering and pressing section, where the second covering and pressing section covers the second glass of the second product. The second carrier moves the second product to the second inspection section, where the second inspection mechanism performs low-precision inspection on the back surface of the second product located in the second inspection section.

[0024] S4: During the fourth time period, the first inspection mechanism completes high-precision inspection of the front surface of the first product. The first carrier moves to the first covering and pressing section. The first sealing and pressing mechanism removes the first glass. The first carrier moves the first product to the first transfer section. The first transport mechanism adsorbs the first product and transfers it to the third adsorption platform.

[0025] Simultaneously, the second inspection mechanism completes a low-precision inspection of the back of the second product. Subsequently, the second carrier moves to the second covering and pressing section. The second sealing and pressing mechanism removes the second glass. The second carrier drives the second product to move to the second transfer section. The second transport mechanism adsorbs the second product and transfers it to the second adsorption platform.

[0026] S5: During the fifth time period, the first adsorption platform and the third adsorption platform both move toward the third adsorption platform to clamp the two products. The flip mechanism rotates 180 degrees, and the first adsorption platform and the third adsorption platform move away from the second adsorption platform. At this time, the first adsorption platform is at the bottom and carries the second product with the front side facing up. The second adsorption platform carries the first product with the back side facing up.

[0027] The first inspection mechanism absorbs the second product and transfers it to the first carrying platform located in the first transfer section. The first carrying platform moves to the first covering and pressing section. The first sealing and pressing mechanism covers the first glass on the first carrying platform. The first carrying platform moves to the first inspection section, so that the first inspection mechanism can perform high-precision inspection on the front of the second product.

[0028] Simultaneously, the second inspection mechanism absorbs the first product and transfers it to the second carrying platform located in the second transfer section. The second carrying platform moves to the second covering and pressing section. The second sealing and pressing mechanism covers the second glass on the second carrying platform. The second carrying platform moves to the second inspection section for the second inspection mechanism to perform low-precision inspection on the back of the first product.

[0029] S6: During the sixth time period, the second inspection mechanism completes the low-precision inspection of the back of the first product, the second carrier moves to the second covering and pressing section, the second sealing and pressing mechanism removes the second glass, and then the second carrier moves to the second transfer section;

[0030] If both the front and back of the first product are tested to be qualified, the second transport mechanism transfers the first product on the second carrier to the third adsorption platform, and the first transport mechanism adsorbs the first product on the third adsorption platform and transfers it out of the first transfer section to unload the first product;

[0031] S7: In the seventh time period, the first inspection mechanism completes the high-precision inspection of the front surface of the second product, the first carrier moves to the first covering and pressing section, the first sealing and pressing mechanism removes the first glass, and then the first carrier moves to the first transfer section;

[0032] If both the front and back of the second product are tested to be qualified, the first transport mechanism absorbs the second product on the first carrying platform and transfers it out of the first transfer section to unload the second product;

[0033] S8: When any side of the two products is detected to be unqualified, the products are transferred out of the second transfer section through the second transport component and the products are recycled.

[0034] Compared with the prior art, the advantages of the present invention are:

[0035] The first conveying mechanism and the second conveying mechanism operate independently. While the first detection mechanism performs high-precision detection on the product on the first loading platform, the second detection mechanism performs low-precision detection on the product on the second loading platform. Through this parallel detection method, the detection time is fully utilized and the idle time of the equipment due to waiting for the front detection to be completed is reduced. Through the coordinated work of the first conveying mechanism, the second conveying mechanism, the flipping mechanism, the first transporting mechanism and the second transporting mechanism, while the high-precision detection of the front is being carried out, the back of another product can be subjected to low-precision detection or other inspection preparation work, thereby balancing the impact of the time difference of the front and back detection, realizing efficient coordination of the detection process, avoiding the problem of low detection efficiency caused by the difference in detection time, and enabling the entire detection system to operate more stably and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Figure 1 This is a structural schematic diagram of an FPC appearance inspection device according to the present invention;

[0038] Figure 2 is a structural schematic diagram of the first transport mechanism of the present invention;

[0039] Figure 3 Schematic diagram of the structure of the flipping mechanism of the present invention;

[0040] Figure 4 is a structural schematic diagram of the second transport mechanism of the present invention;

[0041] Figure 5 Schematic diagram of the structure of the first detection mechanism and the second detection mechanism of the present invention;

[0042] Figure 6 Schematic diagram of the structure of the first sealing and pressing mechanism and the second sealing and pressing mechanism of the present invention;

[0043] Figure 7 This is a structural diagram of an FPC appearance inspection device according to the second embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1. First conveying mechanism; 11. First guide rail; 111. First transfer section; 112. First detection section; 113. First covering section; 12. First carrying platform; 2. Turning mechanism; 22. Turning motor; 23. Carrying frame; 24. First adsorption platform; 25. Second adsorption platform; 26. Third adsorption platform; 27. Linear guide rail; 3. Second conveying mechanism; 31. Second guide rail; 311. Second transfer section; 312. Second detection section; 313. Second covering section; 32. Second carrying platform; 4. First transport mechanism; 41. First drive assembly; 411. First track; 412. First slide rail; 413. Second slide rail; 414. First slider; 42. First carrying plate; 43. First adsorption nozzle; 5. Second transport mechanism; 51. Second drive assembly Parts; 511, second track; 512, third slide rail; 513, fourth slide rail; 514, second slider; 52, second carrying plate; 53, second adsorption nozzle; 61, first detection mechanism; 611, first transmission assembly; 6111, first screw rod; 6112, first guide frame; 612, first camera; 62, second detection mechanism; 621, second transmission assembly; 6211, second screw rod; 6212, second guide frame; 622, second camera; 71, first sealing and pressing mechanism; 711, first cylinder; 712, first bracket; 713, first glass; 714, first support bar; 72, second sealing and pressing mechanism; 721, second cylinder; 722, second bracket; 723, second glass; 724, second support bar; 8, support frame. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example 1

[0049] like Figure 1 As shown, an FPC appearance inspection device includes a first conveying mechanism 1, a flipping mechanism 2, and a second conveying mechanism 3, which are arranged in sequence along a first direction. The first conveying mechanism 1 is movably connected to a first inspection mechanism 61 for high-precision inspection of products on the first conveying mechanism 1. The second conveying mechanism 3 is movably connected to a second inspection mechanism 62 for low-precision inspection of products on the second conveying mechanism 3. The first conveying mechanism 1 is provided with a first conveying mechanism 4 for transferring products to the first conveying mechanism 1 and the flipping mechanism 2. The second conveying mechanism 3 is provided with a second conveying mechanism 5 for transferring products to the second conveying mechanism 3 and the flipping mechanism 2. The flipping mechanism 2 flips two products simultaneously, and the first conveying mechanism 4 and the second conveying mechanism 5 transfer the corresponding products. High-precision inspection is performed on the front side of one product, while low-precision inspection and pre-inspection preparation are performed on the back side of another product. Two products are inspected as a group, greatly improving product inspection efficiency.

[0050] The first conveying mechanism 1 includes a first guide rail 11 and a first carrying platform 12. The first guide rail 11 includes a first transfer section 111, a first detection section 112 and a first covering section 113 in sequence along the second direction. The first carrying platform 12 slides between the first transfer section 111, the first detection section 112 and the first covering section 113 along the second direction. The top of the first carrying platform 12 is configured as a horizontal plane for carrying products. A number of adsorption holes are evenly arranged on the top of the first carrying platform 12 for adsorbing products located on the top plane of the first carrying platform 12. In this embodiment, the first carrying platform 12 is a pneumatic adsorption platform. In other embodiments, the first carrying platform can adopt a vacuum adsorption platform or a porous ceramic adsorption platform. Preferably, the product on the first carrying platform 12 faces upward, that is, the product on the first carrying platform 12 is subjected to high-precision inspection.

[0051] like Figure 2As shown, the first transport mechanism 4 is located near the first transfer section 111 of the first guide rail 11. The first transport mechanism 4 includes a first drive assembly 41 and a first carrier plate 42. The first drive assembly 41 extends and contracts in a first direction, and the first carrier plate 42 is fixed to the end of the first drive assembly 41. Preferably, the first carrier plate 42 passes along the first direction through the turnover mechanism 2, the first transfer section 111 of the first guide rail 11, and the space between the first guide rail 11 and the turnover mechanism 2. It is worth noting that the space between the first guide rail 11 and the turnover mechanism 2 is equipped with a loading and unloading device (not shown in the figure) for products. The first transport mechanism 4 removes uninspected products from this device and transfers qualified products to this device for collection.

[0052] In this embodiment, the first carrier plate 42 is constructed as a plate-like structure with a horizontal bottom surface. Several groups of first suction nozzles 43 are fixed to the bottom surface of the first carrier plate 42. The suction ends of the first suction nozzles 43 are located at the same height for sucking products. Preferably, the first suction nozzles 43 are porous suction nozzles. In other embodiments, the first suction nozzles 43 can be flat nozzles or corrugated nozzles.

[0053] like Figure 1 As shown, a support frame 8 is fixedly mounted on the top of the first conveying mechanism 1, and the support frame 8 spans the first conveying mechanism 1 and the second conveying mechanism 3 along the first direction. Specifically, one end of the support frame 8 along the first direction is fixedly mounted on the side of the first conveying mechanism 1, and the other end is fixedly mounted on the side of the second conveying mechanism 3. Space for products to pass through is left between the top of the first conveying mechanism 1 and the top of the second conveying mechanism 3 and the bottom of the support frame 8. The support frame 8 is disposed between the first transfer section 111 and the first detection section 112. That is, one side of the support frame 8 along the second direction is the first transfer section 111, and the other side is the first detection section 112 and the first capping section 113.

[0054] Preferably, the first drive assembly 41 has translational freedom in the vertical direction and the first direction. Specifically, the first drive assembly 41 includes a first rail 411, a first slide rail 412, and a second slide rail 413. The first rail 411 is fixed to the side of the support frame 8 facing the first transfer section 111 and is arranged in the vertical direction. The first slide rail 412 is slidably connected to the first rail 411 in the vertical direction. Preferably, the first slide rail 412 is driven by a motor and a screw.

[0055] The first slide rail 412 is horizontally arranged along a first direction. The second slide rail 413 is slidably connected to the first slide rail 412 along the first direction and is parallel to the first slide rail 412. Preferably, the first slide rail 412 extends along the first direction, and its length covers the working range of the turnover mechanism 2 and the first transfer section 111 of the first conveying mechanism 1. The second slide rail 413 has at least two states: state 1: the second slide rail 413 overlaps the first slide rail 412; state 2: the second slide rail 413 partially extends from the first slide rail 412 in a direction away from the turnover mechanism 2. The second slide rail 413 is slidably connected to the first slider 414. The first slider 414 slides along the first direction on the second slide rail 413. The second slide rail 413 slides along the first direction on the first slide rail 412, driving the first load plate 42 along the first direction through the first transfer section 111 of the first guide rail 11 and the turnover mechanism 2, thereby enabling product loading, unloading, and transfer.

[0056] like Figure 3 As shown, the flipping mechanism 2 is arranged between the first conveying mechanism 1 and the second conveying mechanism 3, and the first conveying mechanism 1 and the second conveying mechanism 3 both extend along the second direction. Preferably, the first conveying mechanism 1 and the second conveying mechanism 3 are arranged in parallel along the second direction. Preferably, the flipping mechanism 2, the first conveying mechanism 1, and the second conveying mechanism 3 are fixedly connected by a frame (not shown in the figure). It is worth noting that the frame is a shell structure with a built-in cavity. The equipment of the present application is all arranged in the internal cavity of the frame, and the structures of the present application are all fixed with the frame as a carrier. The flipping mechanism 2 includes a flipping motor 22 and a carrier frame 23. The shell of the flipping motor 22 is fixedly connected to the frame, the output shaft of the flipping motor 22 is arranged along the second direction, and the output shaft of the flipping motor 22 is fixedly connected to the carrier frame 23.

[0057] The carrier 23 is provided with a first adsorption platform 24, a second adsorption platform 25 and a third adsorption platform 26. The first adsorption platform 24 and the third adsorption platform 26 slide in parallel in opposite or opposite directions, and the second adsorption platform 25 is arranged between the first adsorption platform 24 and the third adsorption platform 26. Specifically, a plurality of linear guide rails 27 are fixed on the side of the carrier 23 facing the support frame 8. The linear guide rails 27 are perpendicular to the output shaft of the flip motor 22. The first adsorption platform 24 and the second adsorption platform 25 are slidably connected to the linear guide rails 27 in sequence. In this embodiment, the second adsorption platform 25 is fixed on the carrier 23. The second adsorption platform 25 is located near the middle position of the carrier 23 to avoid motion interference with the first conveying mechanism 4 and the second conveying mechanism 5. In other embodiments, the second adsorption platform 25 is slidably connected to the linear guide rails 27. The second adsorption platform 25 avoids motion interference with the first conveying mechanism 4 and the second conveying mechanism 5 by moving up and down.

[0058] The first, second, and third adsorption platforms 24, 25, and 26 are constructed as parallel plates, each with adsorption holes for adsorption. The first adsorption platform 24 has adsorption holes on its end facing the second adsorption platform 25, while the third adsorption platform 26 has adsorption holes on its end facing the second adsorption platform 25. The second adsorption platform 25 also has adsorption holes on both sides of its end surface. Preferably, the first, second, and third adsorption platforms 24, 25, and 26 are connected to an air pump (not shown) via a hose to generate negative pressure for adsorption.

[0059] The second conveying mechanism 3 includes a second guide rail 31 and a second carrying platform 32. The second guide rail 31 is parallel to the first guide rail 11. The second guide rail 31 includes a second transfer section 311, a second detection section 312, and a second pressing section 313 in sequence along the second direction. The first transfer section 111 and the second transfer section 311 correspond to each other along the first direction, the first detection section 112 and the second detection section 312 correspond to each other along the first direction, and the second pressing section 313 corresponds to each other along the first direction. That is, the first transfer section 111 and the second transfer section 311 are located on the same side of the support frame 8. The second carrying platform 32 slides along the second direction between the second transfer section 311, the second detection section 312, and the second pressing section 313 for transferring products on the second slide rail 413. The top of the second carrying platform 32 is configured as a horizontal surface for carrying products. A plurality of suction holes are evenly distributed on the top of the second carrying platform 32 for sucking products located on the top plane of the second carrying platform 32. In this embodiment, the second carrier 32 is a pneumatic adsorption platform. In other embodiments, the second carrier can be a vacuum adsorption platform or a porous ceramic adsorption platform. Preferably, the product on the second carrier 32 is facing up, that is, the product on the first carrier 12 is subjected to low-precision inspection.

[0060] like Figure 4 As shown, the second transport mechanism 5 is disposed at the second transfer section 311. The second transport mechanism 5 includes a second drive assembly 51 and a second carrier plate 52. The second drive assembly 51 extends and retracts along a first direction, and the second carrier plate 52 is fixed to the end of the second drive assembly 51. Preferably, the second carrier plate 52 passes along the first direction through the flipping mechanism 2, the second transfer section 311 of the second guide rail 31, and the space where the second guide rail 31 faces away from the flipping mechanism 2. It is worth noting that the space where the second guide rail 31 faces away from the flipping mechanism 2 is equipped with a defective product recovery device (not shown in the figure). The second transport mechanism 5 transfers defective products to the defective product recovery device.

[0061] In this embodiment, the second supporting plate 52 is constructed as a plate-like structure, the bottom surface of the second supporting plate 52 is a horizontal plane, and a plurality of groups of second adsorption nozzles 53 are fixedly provided on the bottom surface of the second supporting plate 52, and the adsorption ends of the second adsorption nozzles 53 are located in the same horizontal plane for smoothly adsorbing the product. Preferably, the second drive assembly 51 has three mutually perpendicular translational degrees of freedom. Specifically, the second drive assembly 51 includes a second rail 511, a third slide rail 512 and a fourth slide rail 513. The second rail 511 is fixed to the side of the support frame 8 facing the second transfer section 311, and the second rail 511 is arranged in the vertical direction. The third slide rail 512 is connected to the second rail 511 by sliding in the vertical direction. Preferably, the third slide rail 512 is driven by a motor and a screw.

[0062] The third slide rail 512 is horizontally arranged along the first direction, and the fourth slide rail 513 is slidably connected to the third slide rail 512 along the first direction, and the fourth slide rail 513 is parallel to the third slide rail 512. Preferably, the third slide rail 512 extends along the first direction, and its length covers the working range of the flip mechanism 2 and the second transfer section 311 of the second conveying mechanism 3. The fourth slide rail 513 has at least two states: state 1: the fourth slide rail 513 overlaps with the third slide rail 512; state 2: the fourth slide rail 513 partially extends out of the third slide rail 512 in a direction away from the flip mechanism 2. The third slide rail 512 is slidably connected to the second slider 514. The second supporting plate 52 is fixed to the second slider 514 to drive the second supporting plate 52 along the first direction through the second transfer section 311 and the flip mechanism 2, thereby achieving product transfer between the second transfer section 311 and the flip mechanism 2 and the discharge of unqualified products.

[0063] Combine Figure 1 、 Figure 5 As shown, the first detection mechanism 61 and the second detection mechanism 62 are both arranged on the side of the support frame 8 near the first detection section 112 and the second detection section 312. The first detection mechanism 61 includes a first transmission assembly 611 and a first camera 612. The first transmission assembly 611 has translational freedom along the first direction and the vertical direction. The first transmission assembly 611 includes a first screw rod 6111 and a first guide frame 6112. The first screw rod 6111 is rotatably connected to the support frame 8 along the first direction. The first screw rod 6111 is driven by a motor. The first guide frame 6112 is threadedly connected to the first screw rod 6111. The first guide frame 6112 translates along the first direction. The movement range of the first guide frame 6112 is the width of the first guide rail 11 along the first direction.

[0064] The first camera 612 is connected to the first guide frame 6112 by sliding in the vertical direction. The first camera 612 is set toward the first detection section 112. The first camera 612 moves in the vertical direction relative to the first guide frame 6112 to adjust the depth of field of the first camera 612. The first carrier 12 absorbs the product and moves it to the first detection section 112. The first carrier 12 moves in coordination with the first transmission assembly 611, so that the first camera 612 detects the front of the product in an "S"-shaped path. Specifically, the first carrier 12 moves intermittently in the first direction. When the first carrier 12 stops, the first guide frame 6112 drives the first camera 612 to perform a partial inspection of the product along the first direction. The first carrier 12 moves a fixed distance in the second direction. The first guide frame 6112 drives the first camera 612 to perform a partial inspection of the product again along the first direction, thereby performing a global inspection of the product.

[0065] The first camera 612 is a high-precision camera. Specifically, the first camera 612 uses a 20-megapixel industrial camera to detect defects such as line breaks / short circuits, pad defects, solder mask offset, and tiny scratches on the front of the product.

[0066] The second detection mechanism 62 includes a second transmission assembly 621 and a second camera 622. The second transmission assembly 621 includes a second screw 6211 and a second guide frame 6212. The second screw 6211 is rotatably connected to the support frame 8 in the second direction. The second guide frame 6212 is threadedly connected to the second screw 6211. The second guide frame 6212 moves in the first direction. The second camera 622 is vertically slidably connected to the second guide frame 6212. The second camera 622 is positioned toward the second detection section 312 and is used to detect the back side of the product on the second support platform 32. The detection path of the second camera 622 is similar to that of the first camera 612 and will not be further described here. The detection accuracy of the second camera 622 is much lower than that of the first camera 612. The detection area of the second camera 622 is larger than that of the first camera 612. The second guide frame 6212 drives the second camera 622 at a faster speed than the first guide frame 6112 drives the first camera 612. In this embodiment, the low-precision detection speed of the second detection mechanism 62 on the back of the product is higher than the high-precision detection speed of the first detection mechanism 61 on the front of the product.

[0067] The second camera 622 is a low-precision camera. The second camera 622 uses a two-megapixel camera to detect macro defects on the back of the product, such as obvious creases, large-area contamination, and warping, and performs non-critical inspections on the back of the product.

[0068] like Figure 6As shown, a first sealing mechanism 71 is provided at the top of the first covering section 113. The first sealing mechanism 71 includes a first cylinder 711, a first bracket 712, and a first glass 713. The cylinder body of the first cylinder 711 is fixedly connected to the frame. The first cylinder 711 extends vertically, and the first bracket 712 is fixedly connected to the piston rod of the cylinder. The first cylinder 711 drives the first bracket 712 to move vertically. The first glass 713 is movably supported on the bottom of the first bracket 712. The first bracket 712 moves toward the first covering section 113 to cover the first glass 713 on the first supporting platform 12 located in the first covering section 113. Specifically, the cross-section of the first bracket 712 along the second direction is "n"-shaped, that is, the first bracket 712 has a downward opening, and the size of the opening of the first bracket 712 is larger than the size of the first supporting platform 12 along the first direction. The first bracket 712 can cover the first supporting platform 12 downward, and a pair of first support bars 714 are fixed to the bottom opening of the first bracket 712. The first support bars 714 extend in opposite directions. The first support bars 714 can support the first glass 713, and the first support bars 714 avoid interference with the first supporting platform 12 in the vertical direction.

[0069] A second sealing mechanism 72 is installed at the top of the second covering section 313. The second sealing mechanism 72 includes a second cylinder 721, a second bracket 722, and a second glass 723. The cylinder body of the second cylinder 721 is fixedly connected to the frame. The second cylinder 721 extends vertically, and the second bracket 722 is fixedly connected to the cylinder's piston rod. The second cylinder 721 drives the second bracket 722 to move vertically, and the second glass 723 is movably supported on the bottom of the second bracket 722. The second bracket 722 moves toward the second covering section 313 to cover the second glass 723 on the second supporting platform 32 located in the second covering section 313. Specifically, the cross-section of the second bracket 722 along the second direction is "n"-shaped, that is, the second bracket 722 has a downward opening, and the size of the opening of the second bracket 722 is larger than the size of the second supporting platform 32 along the first direction. The second bracket 722 can cover the second supporting platform 32 downward, and a pair of second support bars 724 are fixed to the bottom opening of the second bracket 722. The second support bars 724 extend in opposite directions. The second support bars 724 can support the second glass 723, and the second support bars 724 avoid interference with the second supporting platform 32 in the vertical direction.

[0070] The present application also provides a method for detecting the appearance of an FPC.

[0071] The details are as follows:

[0072] S1: The first transport mechanism 4 absorbs the first product and transfers it to the first carrying platform 12 located in the first transfer section 111, with the front side of the first product facing upwards.

[0073] S2: The first carrier 12 moves from the first transfer section 111 to the first pressing section 113. The first pressing mechanism 71 presses the first glass 713 onto the first carrier 12. The first carrier 12 then moves to the first inspection section 112. Simultaneously, the first transport mechanism 4 adsorbs the second product and transfers it to the third adsorption station 26, with the front side of the second product facing upward. The flipping mechanism 2 flips the second product, and the second transport mechanism 5 transfers the second product from the third adsorption station 26 to the second carrier 32 in the second transfer section 311, with the back side of the second product facing upward.

[0074] S3: The first detection mechanism 61 performs high-precision detection on the front side of the first product located in the first detection section 112. Synchronously, the second supporting platform 32 drives the second product to move to the second covering section 313. The second covering section 313 covers the second glass 723 of the second product. The second supporting platform 32 drives the second product to move to the second detection section 312. The second detection mechanism 62 performs low-precision detection on the back side of the second product located in the second detection section 312.

[0075] S4: The first detection mechanism 61 completes the high-precision inspection of the front of the first product, the first carrier 12 moves to the first covering section 113, the first sealing mechanism 71 removes the first glass 713, the first carrier 12 drives the first product to move to the first transfer section 111, and the first conveying mechanism 4 adsorbs the first product and transfers it to the third adsorption platform 26. Since the low-precision inspection time is less than the high-precision inspection time, the second detection mechanism 62 synchronously completes the low-precision inspection of the back of the second product, the second carrier 32 moves to the second covering section 313, the second sealing mechanism 72 removes the second glass 723, the second carrier 32 drives the second product to move to the second transfer section 311, the second conveying mechanism 5 adsorbs the second product and transfers it to the second adsorption platform 25, and the first adsorption platform 24 and the third adsorption platform 26 both move toward the second adsorption platform 25 to clamp the two products. The flipping mechanism 2 rotates 180 degrees, and the first adsorption platform 24 and the third adsorption platform 26 move in the direction away from the second adsorption platform 25. At this time, the first adsorption platform 24 is at the bottom and carries the second product, and the second product faces up. The second adsorption platform 25 carries the first product, and the first product faces up.

[0076] S5: The first inspection mechanism 61 absorbs the second product and transfers it to the first carrier 12 located in the first transfer section 111. The first carrier 12 moves to the first covering section 113. The first sealing mechanism 71 covers the first carrier 12 with the first glass 713. The first carrier 12 moves to the first inspection section 112, allowing the first inspection mechanism 61 to perform high-precision inspection on the front of the second product. Simultaneously, the second inspection mechanism 62 absorbs the first product and transfers it to the second carrier 32 located in the second transfer section 311. The second carrier 32 moves to the second covering section 313. The second sealing mechanism 72 covers the second glass 723 on the second carrier 32. The second carrier 32 moves to the second inspection section 312, allowing the second inspection mechanism 62 to perform low-precision inspection on the back of the first product.

[0077] S6: The second inspection mechanism 62 first completes a low-precision inspection of the back of the first product. The second carrier 32 moves to the second covering section 313. The second sealing mechanism 72 removes the second glass 723. The second carrier 32 then moves to the second transfer section 311. If both the front and back of the first product pass the inspection, the second transport mechanism 5 transfers the first product from the second carrier 32 to the third suction table 26. The first transport mechanism 4 then transfers the first product from the third suction table 26 out of the first transfer section 111, unloading the first product.

[0078] S7: The first detection mechanism 61 completes the high-precision detection of the front of the second product, the first carrier 12 moves to the first covering section 113, the first sealing mechanism 71 removes the first glass 713, and then the first carrier 12 moves to the first transfer section 111. If the front and back of the second product are both qualified, the first conveying mechanism 4 adsorbs the second product on the first carrier 12 and transfers it out of the first transfer section 111 to unload the second product.

[0079] The above steps are for testing both products to ensure they are qualified. If either side of the product is found to be unqualified, the product is transferred to the second loading platform 32 and then moved by the second transport mechanism 5 out of the second transfer section 311 for recycling. It is worth noting that the qualified rate of products in the actual production process exceeds 90%, and the above testing is only for recycling a small number of unqualified products.

[0080] The above solution simultaneously inspects two products, performing high-precision inspection on the front of the product and low-precision inspection on the back of the product. Through reasonable path design and the time difference between the front and back inspections of the product, the inspection efficiency is greatly improved. Example 2

[0081] like Figure 7As shown, the difference between this embodiment and embodiment 1 is that the first sealing and pressing mechanism 71 is fixed on the frame at the top of the first transfer section 111, and the second sealing and pressing mechanism 72 is fixed on the frame at the top of the second transfer section 311, that is, the product is sealed and pressed in the first transfer section and the second transfer section 311.

[0082] The implementation principle of this embodiment is as follows:

[0083] S1: The first transport mechanism 4 absorbs the first product and transfers it to the first carrier 12 located in the first transfer section 111. At this time, the front of the first product faces upward, and the first sealing mechanism 71 presses the first glass 713 onto the first carrier 12.

[0084] S2: The first carrier 12 moves from the first transfer section 111 to the first inspection section 112. The first inspection mechanism 61 performs a high-precision inspection on the front side of the first product in the first inspection section 112. Simultaneously, the first transport mechanism 4 adsorbs the second product and transfers it to the third adsorption platform 26. The second transport mechanism 5 transfers the second product to the second carrier 32, with the back side of the second product facing upward. The second sealing mechanism 72 presses the second glass 723 onto the second carrier 32. The second carrier 32 moves to the second inspection section 312, and the second inspection mechanism 62 performs a low-precision inspection on the back side of the second product.

[0085] S3: The first detection mechanism 61 completes the high-precision detection of the front of the first product, the first carrier 12 moves to the first transfer section 111, the first sealing and pressing mechanism 71 removes the first glass 713, and the first conveying mechanism 4 adsorbs the first product and transfers it to the third adsorption platform 26. Synchronously, the second detection mechanism 62 completes the low-precision detection of the back of the second product, the second carrier 32 moves to the second transfer section 311, and the second sealing and pressing mechanism 72 removes the second glass 723. The second conveying mechanism 5 adsorbs the second product and transfers it to the second adsorption platform 25. The first adsorption platform 24 and the third adsorption platform 26 both move toward the third adsorption platform 26 to clamp the two products. The flipping mechanism 2 rotates 180 degrees, and the first adsorption platform 24 and the third adsorption platform 26 move in the direction away from the second adsorption platform 25. At this time, the first adsorption platform 24 is at the bottom and carries the second product, with the front of the second product facing up, and the second adsorption platform 25 carries the first product, with the back of the first product facing up.

[0086] S4: The first inspection mechanism 61 absorbs the second product and transfers it to the first carrier 12 located in the first transfer section 111. The first sealing mechanism 71 covers the first carrier 12 with a first glass 713. The first carrier 12 moves to the first inspection section 112, allowing the first inspection mechanism 61 to perform a high-precision inspection on the front of the second product. Simultaneously, the second inspection mechanism 62 absorbs the first product and transfers it to the second carrier 32 located in the second transfer section 311. The second sealing mechanism 72 covers the second carrier 32 with a second glass 723. The second carrier 32 moves to the second inspection section 312, allowing the second inspection mechanism 62 to perform a low-precision inspection on the back of the first product.

[0087] S5: The second detection mechanism 62 completes the low-precision detection of the back of the first product, the second carrier 32 moves to the second transfer section 311, and the second sealing and pressing mechanism 72 removes the second glass 723. If both the front and back of the first product are qualified, the second conveying mechanism 5 transfers the first product on the second carrier 32 to the third adsorption platform 26. The first conveying mechanism 4 adsorbs the first product on the third adsorption platform 26 and transfers it out of the first transfer section 111 to unload the first product.

[0088] S6: The first detection mechanism 61 completes high-precision detection of the front of the second product, the first carrier 12 moves to the first transfer section 111, and the first sealing and pressing mechanism 71 removes the first glass 713. If both the front and back of the second product are qualified, the first conveying mechanism 4 adsorbs the second product on the first carrier 12 and transfers it out of the first transfer section 111 to unload the second product.

[0089] This embodiment reduces the number of product transfer steps through path optimization, thereby further improving product detection efficiency.

[0090] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An FPC appearance inspection device, characterized in that: include: A first conveying mechanism includes a first guide rail and a first carrying platform sliding along the first guide rail; a second conveying mechanism comprising a second carrying platform and a second guide rail parallel to the first guide rail, the second carrying platform being slidably connected to the second guide rail, the first carrying platform and the second carrying platform both being used to carry products; A turning mechanism, provided between the first conveying mechanism and the second conveying mechanism, for turning the front and back of the product over; The flipping mechanism includes a carrier and a flipping motor. The carrier is fixed to the output shaft of the flipping motor. The carrier is sequentially provided with a first adsorption platform, a second adsorption platform, and a third adsorption platform. The first adsorption platform and the third adsorption platform move toward the second adsorption platform to clamp the product, so as to flip the front and back of two products at the same time. a first transport mechanism having at least a travel range for moving between the first conveying mechanism and the turning mechanism to transfer products; a second transport mechanism having at least a travel range for moving between the second conveying mechanism and the turnover mechanism to transfer products; A first detection mechanism is provided on the top of the first guide rail and is used for high-precision detection of the front surface of the product on the first loading platform; The second detection mechanism is arranged on the top of the second guide rail and is used for low-precision detection of the back surface of the product on the second supporting platform.

2. The FPC appearance inspection device according to claim 1, characterized in that: The first guide rail includes a first transfer section and a first detection section, the second guide rail includes a second transfer section and a second detection section, and the first transfer section, the flip mechanism, and the second transfer section are arranged in sequence along the first direction; The FPC appearance inspection device includes a support frame spanning the first guide rail and the second guide rail along a first direction, the first transfer section and the second transfer section are located on the same side of the support frame, and the first inspection section and the second inspection section are located on the other side of the support frame; The first conveying mechanism and the second conveying mechanism are fixedly arranged on the side of the support frame facing the first transfer section, and the first detection mechanism and the second detection mechanism are fixedly arranged on the side of the support frame facing the second transfer section.

3. The FPC appearance inspection device according to claim 2, characterized in that: The first transport mechanism includes a first drive assembly and a first carrying plate, and the second transport mechanism includes a second drive assembly and a second carrying plate, wherein the first drive assembly and the second drive assembly are fixedly arranged on the same side of the support frame, and both have translational freedom along the first direction and along the vertical direction; The travel range of the first drive component includes the flipping mechanism, the first transfer section, and the extension space of the first transfer section away from the flipping mechanism, so as to transfer or load and unload products. The travel range of the second drive component includes the flipping mechanism, the second transfer section, and the extension space of the first transfer section away from the flipping mechanism, so as to transfer products or recycle unqualified products.

4. The FPC appearance inspection device according to claim 2, characterized in that: The first detection mechanism includes a first transmission assembly and a first camera. The first transmission assembly having a first degree of freedom in a first direction is fixed to the support frame. The first camera is fixed to the output end of the first transmission assembly. The first transmission assembly drives the first camera to reciprocate in the first direction relative to the first detection section. The first supporting platform performs unidirectional intermittent motion in the first detection section for high-precision detection of the front surface of the product on the first supporting platform. The second detection mechanism includes a second transmission assembly and a second camera. The second transmission assembly having freedom along the first direction is fixed to the support frame, and the second camera is fixed at the output end of the second transmission assembly. The second transmission assembly drives the second camera to reciprocate along the first direction relative to the second detection section. The second supporting platform moves unidirectionally intermittently in the second detection section for low-precision detection of the back of the product on the second supporting platform.

5. The FPC appearance inspection device according to claim 2, characterized in that: A first sealing and pressing mechanism is provided on the top of the first guide rail, and the first sealing and pressing mechanism includes a first bracket and a first glass, and the first bracket movably carries the first glass and moves it vertically toward the first guide rail, so as to press the first glass cover or separate it from the first supporting platform; A second sealing and pressing mechanism is provided on the top of the second guide rail. The second sealing and pressing mechanism includes a second bracket and a second glass. The second bracket movably carries the second glass and moves vertically toward the second guide rail to cover or separate the second glass from the second supporting platform.

6. The FPC appearance inspection device according to claim 5, characterized in that: The first detection section has a first covering section extending in a direction away from the first transfer section, and the first sealing mechanism is located at the top of the first covering section. The second detection section has a second covering section extending in a direction away from the second transfer section, and the second sealing mechanism is located at the top of the second covering section.

7. The FPC appearance inspection device according to claim 5, characterized in that: The first sealing and pressing mechanism is located at the top of the first transfer section, and the second sealing and pressing mechanism is located at the top of the second transfer section.

8. A method for inspecting the appearance of an FPC, characterized by: The FPC appearance inspection device comprising any one of claims 1 to 7; the inspection method is as follows: In a first time period, a first product faces upward and arrives at a first loading platform; During the second time period, the first product arrives at the first inspection section and the inspection begins; at the same time, the second product arrives at the second loading platform with the reverse side facing upwards; During the third time period, the second product arrives at the second detection section and the detection begins; During the fourth time period, the first and second products continue to be tested synchronously until the testing is completed. At this point, the high-precision testing time for the front side of the first product is the sum of the third and fourth time periods, and the low-precision testing time for the back side of the second product is the fourth time period. During the fifth time period, the first product and the second product are turned over synchronously, and the first product with the reverse side facing upward is transferred to the second inspection section, and the second product with the front side facing upward is transferred to the first inspection section; During the sixth time period, the first and second products are tested simultaneously. The low-precision test of the first product is completed first, and the product is removed for unloading. During the seventh time period, the high-precision inspection of the second product is completed and the blanking is removed; at this point, the low-precision inspection time for the back of the first product is the sixth time period, and the high-precision inspection time for the front of the second product is the sum of the sixth time period and the seventh time period.

9. The FPC appearance inspection method according to claim 8, characterized in that: S1: In a first time period, the first transport mechanism absorbs the first product and transfers it to the first loading platform located in the first transfer section, with the front side of the first product facing upwards; S2: During the second time period, the first carrier moves from the first transfer section to the first covering section. The first covering mechanism covers the first glass on the first carrier. The first carrier then moves to the first inspection section. Simultaneously, the first transport mechanism adsorbs the second product and transfers it to the third adsorption station. The second transport mechanism transfers the second product on the third adsorption station to the second carrier on the second transfer section, with the reverse side of the second product facing upwards. S3: During a third time period, the first inspection mechanism performs high-precision inspection on the front surface of the first product located in the first inspection section. Simultaneously, the second carrier moves the second product to the second covering and pressing section, where the second covering and pressing section covers the second glass of the second product. The second carrier moves the second product to the second inspection section, where the second inspection mechanism performs low-precision inspection on the back surface of the second product located in the second inspection section. S4: During the fourth time period, the first inspection mechanism completes high-precision inspection of the front surface of the first product. The first carrier moves to the first covering and pressing section. The first sealing and pressing mechanism removes the first glass. The first carrier moves the first product to the first transfer section. The first transport mechanism adsorbs the first product and transfers it to the third adsorption platform. Simultaneously, the second inspection mechanism completes a low-precision inspection of the back of the second product. Subsequently, the second carrier moves to the second covering and pressing section. The second sealing and pressing mechanism removes the second glass. The second carrier drives the second product to move to the second transfer section. The second transport mechanism adsorbs the second product and transfers it to the second adsorption platform. S5: During the fifth time period, the first adsorption platform and the third adsorption platform both move toward the third adsorption platform to clamp the two products. The flip mechanism rotates 180 degrees, and the first adsorption platform and the third adsorption platform move away from the second adsorption platform. At this time, the first adsorption platform is at the bottom and carries the second product with the front side facing up. The second adsorption platform carries the first product with the back side facing up. The first inspection mechanism absorbs the second product and transfers it to the first carrying platform located in the first transfer section. The first carrying platform moves to the first covering and pressing section. The first sealing and pressing mechanism covers the first glass on the first carrying platform. The first carrying platform moves to the first inspection section, so that the first inspection mechanism can perform high-precision inspection on the front of the second product. Simultaneously, the second inspection mechanism absorbs the first product and transfers it to the second carrying platform located in the second transfer section. The second carrying platform moves to the second covering and pressing section. The second sealing and pressing mechanism covers the second glass on the second carrying platform. The second carrying platform moves to the second inspection section for the second inspection mechanism to perform low-precision inspection on the back of the first product. S6: During the sixth time period, the second inspection mechanism completes the low-precision inspection of the back of the first product, the second carrier moves to the second covering and pressing section, the second sealing and pressing mechanism removes the second glass, and then the second carrier moves to the second transfer section; If both the front and back of the first product are tested to be qualified, the second transport mechanism transfers the first product on the second carrier to the third adsorption platform, and the first transport mechanism adsorbs the first product on the third adsorption platform and transfers it out of the first transfer section to unload the first product; S7: In the seventh time period, the first inspection mechanism completes the high-precision inspection of the front surface of the second product, the first carrier moves to the first covering and pressing section, the first sealing and pressing mechanism removes the first glass, and then the first carrier moves to the first transfer section; If both the front and back of the second product are tested to be qualified, the first transport mechanism absorbs the second product on the first carrying platform and transfers it out of the first transfer section to unload the second product; S8: When any side of the two products is detected to be unqualified, the products are transferred out of the second transfer section through the second transport component and the products are recycled.

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