A rotary contact lens color pattern pad printing process

Abstract

The present application relates to the technical field of contact lens automatic production, in particular to a rotary contact lens color mold pad printing process method, comprising the following steps: S10, color mold discharging and dust removal treatment; S20, color mold transfer to jig rotating assembly; S30, the jig rotating assembly drives the color mold to rotate; S40, the color mold is first subjected to pre-treatment by a surface treatment station; S50, a visual guidance assembly is used to position and assist the movement of the pad printing station, complete the pattern printing and curing operation; S60, the color mold full inspection device is used to detect pattern defects and color difference; S70, the marking and material receiving of the feeding and discharging processing unit; the rotary contact lens color mold pad printing process method realizes the integration and miniaturization of the equipment involved in the overall process, improves the precision and quality of the movement in the pad printing process, detects defects and color difference of the pad printing pattern, improves the quality of the pattern of the contact lens color mold as a whole, improves the efficiency of the color mold pad printing movement, and optimizes the equipment cost.

Description

Technical Field

[0001] This invention relates to the field of automated contact lens production technology, specifically a rotary contact lens color mold transfer printing process. Background Technology

[0002] Colored contact lenses (cosmetic lenses) feature various colored patterns on the iris. During the manufacturing process, there are several methods for printing patterns onto colored contact lenses, with pad printing (grooving) being a commonly used method.

[0003] Currently, there are many types of equipment for pad printing of colored contact lenses, and their composition and related process design all have certain defects and shortcomings. 1. Some equipment pursues cost-effectiveness and adopts an equidistant transport mechanism, which is relatively simple to implement, but the synchronous printing does not support visual automatic alignment, and the products often have pad printing misalignment defects. 2. Another type of equipment has a higher degree of automation and has visual automatic alignment function, but its performance in color difference detection is average, and the linear layout of the equipment makes operation and maintenance unfriendly. Summary of the Invention

[0004] The purpose of this invention is to provide a highly automated, rotary layout, integrated pad printing defect and color difference detection, and visual guidance method for contact lens color mold pad printing.

[0005] To achieve the above objectives, the present invention provides the following technical solution;

[0006] A rotating contact lens color model pad printing process includes a loading and unloading unit, a rotating feeding mechanism, a jig rotation assembly, a surface treatment station, a pad printing station, a visual guidance assembly, a light curing station, and a color model full inspection device.

[0007] The specific process steps are as follows:

[0008] S10, the loading and unloading processing unit performs material unloading and dust removal for the color mold;

[0009] S20. The rotating feeding mechanism transfers the color mold from the loading and unloading processing unit to the jig rotating assembly.

[0010] S30, the jig rotation assembly drives the color mold to rotate, and the color mold rotates through the surface treatment station, pad printing station and light curing station.

[0011] S40, the color mold is first pre-treated by the surface treatment station;

[0012] S50. After the pre-processing is completed, the color mold is positioned and guided by the visual guidance component. The pattern printing and curing operation is completed through at least one ink printing in the pad printing station and one ink curing in the curing station.

[0013] S60. After the final curing is completed, the color mold full inspection device will be used to detect pattern defects and color differences.

[0014] S70. The inspected color mold is transferred to the loading and unloading processing unit 10 by the rotary feeding mechanism for marking and receiving.

[0015] Furthermore, the loading and unloading processing unit includes a loading mechanism for providing color molds, a dust removal mechanism for removing dust from the color molds to be printed, a laser engraving marking mechanism for marking the printed color molds, and a unloading mechanism for collecting the printed color molds.

[0016] Furthermore, the feeding mechanism and the dust removal mechanism are connected through a feeding transfer mechanism, and the laser engraving and marking mechanism and the unloading mechanism are connected through an unloading transfer mechanism. Both the feeding mechanism and the unloading mechanism are equipped with a transfer mechanism on their sides for handling the colored mold.

[0017] Furthermore, the jig rotation assembly includes a rotating platform and a plurality of tooling fixtures equally spaced on the rotating platform; the spacing between the surface treatment station, pad printing station and photocuring station is the same as the spacing between the tooling fixtures.

[0018] Furthermore, in S, each pad printing station is equipped with a corresponding visual guidance component and a light curing component, and includes the following steps:

[0019] S41. The jig rotation assembly moves the color mold to be printed to below the pad printing station;

[0020] S42. With the positioning assistance of the visual guidance component, the pad printing station picks up the ink;

[0021] S43. After dipping in ink, the printing station prints the pattern on the color mold to be printed with the help of the positioning of the vision guidance component.

[0022] S44. After printing is completed, the jig rotation assembly moves the color mold to the light curing assembly for curing.

[0023] S45. After the curing is completed, a jig rotating assembly will transfer the color mold and move the next color mold to be printed to the pad printing station to start the next pad printing cycle.

[0024] Furthermore, the pad printing station includes two pad printing head assemblies, a pad printing head micro-adjustment mechanism for fine-tuning the pad printing head assemblies, a pad printing robot for driving the pad printing head micro-adjustment mechanism, an ink scraping mechanism for providing ink to the pad printing head assemblies, and a cleaning mechanism; the pad printing head is also equipped with an air blowing structure.

[0025] During pad printing, the vision guidance component guides and positions the pad printing robot. The robot drives the pad printing head micro-adjustment mechanism and the pad printing head assembly installed at the end of the micro-adjustment mechanism to work. The micro-adjustment mechanism fine-tunes the actions of the pad printing head assembly. The ink scraping mechanism provides ink to the pad printing head assembly for its pad printing action. The air blowing structure blows air onto the pad printing head assembly and the ink scraping mechanism to control the ink viscosity. After a single pad printing operation, the cleaning mechanism cleans the pad printing head assembly, and the printed color mold enters the curing station below.

[0026] Furthermore, the visual guidance component has a dual-camera layout and is mounted on a rack, with one camera located above the ink scraping mechanism and the other camera located above the tooling fixture corresponding to the pad printing station.

[0027] Furthermore, the color mold full inspection device includes an inspection carrier mechanism, an inspection displacement module that drives the inspection carrier mechanism to move back and forth, an optical inspection mechanism, an inspection frame plate, and an inspection stand plate set on the inspection frame plate;

[0028] The optical inspection mechanism includes a backlight structure, a front light structure, an inspection lifting module for driving the front light structure to rise and fall, and a vision camera; the inspection displacement module and the backlight structure are mounted on the inspection frame plate; the inspection lifting module is mounted on the inspection frame platform.

[0029] During the testing process, the rotary feeding mechanism transports the color mold from the last photocuring station to the testing transport mechanism. The testing transport mechanism adjusts the static posture of the color mold to be tested. The testing displacement module drives the testing transport mechanism above the backlight structure. The testing lifting module drives the front light structure to change the front light illumination height. The vision camera acquires images of the color mold under different lighting conditions. After visual inspection of the acquired images, the rotary feeding mechanism transfers the color mold to the loading and unloading processing unit.

[0030] Furthermore, the detection and transport mechanism includes a rotating mechanism and a pitch-changing mechanism. The rotating mechanism is connected to the detection displacement module via a detection displacement frame, and the pitch-changing mechanism is installed at the output end of the rotating mechanism. One end of the detection displacement frame is connected to the output end of the detection displacement module, and the other end is slidably installed on the displacement auxiliary rail. The pitch-changing mechanism includes a pitch-changing frame installed at the output end of the rotating mechanism, a pitch-changing cylinder installed in the pitch-changing frame, and a detection carrier plate slidably installed on the pitch-changing frame. The pitch-changing cylinder drives the detection carrier plate to slide and change pitch on the pitch-changing frame.

[0031] Furthermore, the pitch cylinder is provided with a set of pitch-changing slides that move relative to each other, and each pitch-changing slide is connected to the detection carrier plate by a pitch-changing frame; the detection carrier plate is provided with pitch-changing guide wheels, and the pitch-changing frame is provided with pitch-changing guide grooves; when pitch is changed, the pitch-changing guide wheels slide in the pitch-changing guide grooves.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] In actual use, the loading and unloading processing unit handles the loading and unloading related work in the color mold pad printing operation. The rotating feeding mechanism sends the color mold to be printed into the color mold pad printing full inspection unit. The color mold pad printing full inspection unit includes a jig rotation assembly that drives the color mold to be printed to rotate, a pad printing station that prints patterns on the color mold to be printed, a vision guidance assembly that assists in positioning the pad printing station, a light curing station that cures the ink, and a color mold full inspection device that detects the pad printing quality.

[0034] In the full inspection unit for color mold pad printing, the color mold to be printed is rotated and transferred in the jig rotating assembly. It undergoes multiple pattern printings at the pad printing station. During the printing process, the visual guidance assembly guides the movement and assists in positioning of the pad printing station. After each pad printing station, a light curing station is set up to quickly cure the pattern ink, ensuring the quality of the pattern pad printing. After the final light curing, a full inspection device for color mold is used to detect defects and color differences in the printed color mold online. After the inspection is completed, the rotating feeding mechanism transports the printed color mold to the loading and unloading processing unit for subsequent material receiving.

[0035] In the color mold pad printing full inspection unit, the color mold to be printed is rotated and transferred in the jig rotating assembly, and then the pattern is printed multiple times in the pad printing station. During the printing process, the movement guidance and positioning assistance of the pad printing station are provided by the vision guidance assembly, and the pad printing station can automatically align with the color film to achieve accurate color printing. After each pad printing station, a curing station is set up to quickly cure the pattern ink to ensure the quality of pattern pad printing. The multi-station repeated pad printing and curing completes the multi-layer pattern overprinting. After the last curing, the color mold full inspection device is used to detect the defects and color difference of the printed color mold online. After the inspection is completed, the rotary feeding mechanism transports the printed color mold to the loading and unloading processing unit for subsequent material receiving processing. Attached Figure Description

[0036] Figure 1 This is a side view of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the loading and unloading processing unit of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the color mold pad printing full inspection unit of the present invention;

[0039] Figure 4 This is a schematic diagram of the pad printing station of the present invention;

[0040] Figure 5 This is a schematic diagram of the micro-adjustment mechanism for the rubber head of the present invention;

[0041] Figure 6 This is a cross-sectional view of the pad printing head assembly of the present invention;

[0042] Figure 7 This is a schematic diagram of the structure of the color mold full inspection device of the present invention;

[0043] Figure 8 This is a side view of the structure of the color mold full inspection device of the present invention;

[0044] Figure 9 This is a schematic diagram of the variable pitch mechanism of the present invention;

[0045] Figure 10 This is a schematic diagram of the pitch-changing mechanism of the present invention from a tilted angle. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] refer to Figure 1-10 As shown, a rotating contact lens color model transfer printing process includes a loading and unloading processing unit 10, a rotating feeding mechanism 30, a jig rotation assembly 21, a surface treatment station 22, a transfer printing station 23, a visual guidance assembly 25, a light curing station 24, and a color model full inspection device 26.

[0048] The specific process steps are as follows:

[0049] S10, the loading and unloading processing unit 10 performs material discharge and dust removal for the color mold;

[0050] S20, The rotating feeding mechanism 30 transfers the color mold from the loading and unloading processing unit 10 to the jig rotating assembly 21;

[0051] S30, the jig rotation assembly 21 drives the color mold to rotate and go through the surface treatment station 22, pad printing station 23 and light curing station 24;

[0052] S40. The colored mold is first pre-treated by the surface treatment station 22;

[0053] S50. After the pre-processing is completed, the color mold is positioned and guided by the visual guidance component 25. The pattern printing and curing operation is completed through at least one ink printing by the pad printing station 23 and ink curing by the curing station 24.

[0054] S60. After the final curing is completed, the color mold full inspection device 26 shall inspect for pattern defects and color difference.

[0055] S70, The inspected color mold is transferred by the rotary feeding mechanism 30 to the loading and unloading processing unit 10 for marking and receiving;

[0056] The UV curing station 24 is a UV curing device used to cure the printed pattern of the pre-printing station 23, thereby improving the printing quality of the pattern; the surface treatment station 22 is a corona treatment device used for surface treatment before the pad printing process; the rotary feeding mechanism 30 consists of three gripping mechanisms and a rotary lifting motor mechanism, used to transport the color mold, reducing the equipment space occupied by the linear feeding of the color mold material, and better realizing equipment integration and automation.

[0057] In actual use, the loading and unloading processing unit 10 performs the loading and unloading related processing work in the color mold pad printing operation. The rotating feeding mechanism 30 sends the color mold to be printed into the color mold pad printing full inspection unit 20. The color mold pad printing full inspection unit 20 includes a jig rotation assembly 21 that drives the color mold to be printed to rotate, a pad printing station 23 that prints patterns on the color mold to be printed, a visual guidance assembly 25 that assists in positioning the pad printing station 23, a light curing station 24 that cures the ink, and a color mold full inspection device 26 that detects the pad printing quality.

[0058] In the color mold pad printing full inspection unit 20, the color mold to be printed is rotated and transferred in the jig rotation assembly 21, and then the pattern is printed multiple times in the pad printing station 23. During the printing process, the visual guidance assembly 25 guides the movement and positions the pad printing station 23, and the pad printing station can automatically align with the color film to achieve accurate color printing. After each pad printing station 23, a light curing station 24 is set up to quickly cure the pattern ink to ensure the quality of pattern pad printing. The multi-station repeated pad printing and light curing complete the multi-layer pattern overprinting. After the last light curing, the color mold full inspection device 26 is used to detect the defects and color difference of the printed color mold online. After the inspection is completed, the rotary feeding mechanism 30 transports the printed color mold to the loading and unloading processing unit 10 for subsequent material receiving processing.

[0059] This rotary contact lens color mold transfer printing process integrates the rotational handling and rotational rotation actions, combining the color mold concave mold handling and color mold transfer printing actions. This achieves the integration and miniaturization of the equipment involved in the overall process flow. Furthermore, the visual guidance component guides and positions the transfer printing station, improving the accuracy and quality of the actions in the transfer printing process. Finally, it detects defects and color differences in the transferred pattern, thereby improving the overall quality of the contact lens color mold pattern, increasing the efficiency of the color mold transfer printing action, and optimizing equipment costs.

[0060] In this embodiment, the loading and unloading processing unit 10 includes a loading mechanism 11 for providing color molds, a dust removal mechanism 12 for removing dust from the color molds to be printed, a laser engraving marking mechanism 13 for marking the printed color molds, and a unloading mechanism 14 for collecting the printed color molds. The loading mechanism 11 and the dust removal mechanism 12 are connected through a loading transfer mechanism 16, and the laser engraving marking mechanism 13 and the unloading mechanism 14 are connected through an unloading transfer mechanism 17. Both the loading mechanism 11 and the unloading mechanism 14 are provided with a transfer mechanism 15 on their sides for transporting the color molds. The initial end of the loading transfer mechanism 16 is connected to the rotary feeding mechanism 30, and the initial end of the unloading transfer mechanism 17 is connected to the rotary feeding mechanism 30.

[0061] The loading mechanism 11 and unloading mechanism 14 are both material frames composed of multiple material cylinders, used to carry the color mold cavity; the loading transfer mechanism 16 and unloading transfer mechanism 17 are both composed of linear modules and jigs, playing the role of transfer operation; the transfer mechanism 15 is a lifting robotic arm for handling.

[0062] The feeding mechanism 11 contains the color mold to be printed. The transfer mechanism 15 transports the color mold to be printed onto the fixture at the initial end of the feeding transfer mechanism 16. The feeding transfer mechanism 16 then moves the fixture and the color mold to the dust removal mechanism 12 for dust removal. After dust removal, the rotary feeding mechanism 30 transports the color mold to the color mold pad printing full inspection unit 20 for pad printing full inspection. After pad printing is completed and the inspection is finished, the rotary feeding mechanism 30 transports the color mold to the fixture at the initial end of the unloading transfer mechanism 17. The unloading transfer mechanism 17 then moves the fixture and the color mold to the laser marking mechanism 13 for laser marking of defective and substandard products. After marking, the mold is transferred to the end of the unloading transfer mechanism 17 and then moved by the transfer mechanism 15 into the unloading mechanism 14, completing the unloading, dust removal, marking, and receiving operations of the color mold in the feeding and unloading sections.

[0063] In this embodiment, the jig rotation assembly 21 includes a rotation platform 211 and a plurality of workpieces 212 equally spaced on the rotation platform 211; the spacing between the surface treatment station 22, pad printing station 23 and light curing station 24 is the same as the spacing between the workpieces 212.

[0064] The jig rotation assembly 21 consists of a rotating platform 211 and multiple tooling fixtures 212. In this application, there are a total of 5 pad printing stations 23 and 5 curing stations 24. Combined with the surface treatment station 22 and the workstation for handling and transfer, a total of 12 tooling fixtures 212 are provided. The 12 tooling fixtures are arranged in an equidistant circular distribution. The first workstation is the handling and transfer workstation. Following the rotation direction of the rotating platform, the surface treatment station 22 and 5 sets of pad printing stations 23 are arranged sequentially at the tooling fixtures 212. Each pad printing station 23 is followed by a curing station 24.

[0065] Furthermore, in step S40, each pad printing station 23 is equipped with a corresponding visual guidance component 25 and a light curing component 24, and includes the following steps:

[0066] S41, The printing mold to be printed is moved to the area below the pad printing station 23 by the fixture rotation assembly 21;

[0067] S42. With the positioning assistance of the visual guidance component 25, the pad printing station 23 picks up the ink;

[0068] S43. After dipping in ink, the printing station 23 prints patterns on the color mold to be printed with the help of positioning of the visual guide component 25.

[0069] S44. After printing is completed, the jig rotation assembly 21 moves the color mold to the light curing assembly 24 for curing.

[0070] S45. After the curing is completed, the fixture rotating assembly 21 will transfer the color mold and move the next color mold to be printed to the pad printing station 23 to start the next pad printing cycle.

[0071] Specifically, the pad printing station 23 includes two pad printing head assemblies 232, a pad printing head micro-adjustment mechanism 233 for fine-tuning the pad printing head assemblies 232, a pad printing robot 231 for driving the movement of the pad printing head micro-adjustment mechanism 233, an ink scraping mechanism 235 for providing ink to the pad printing head assemblies 232, and a cleaning mechanism 234; the pad printing head assemblies 232 are also provided with an air blowing structure;

[0072] During pad printing, the vision guidance component 25 guides and positions the pad printing robot 231. The pad printing robot 231 drives the pad micro-adjustment mechanism 233 and the pad printing pad assembly 232 installed at the end of the pad micro-adjustment mechanism 233 to work. The pad micro-adjustment mechanism 233 fine-tunes the actions of the pad printing pad assembly 232. The ink scraping mechanism 235 provides ink for the pad printing action of the pad printing pad assembly 232. The air blowing structure blows air onto the pad printing pad assembly 232 and the ink scraping mechanism 235 to control the ink viscosity. After a single pad printing is completed, the cleaning mechanism 234 cleans the pad printing pad assembly 232, and the printed color mold enters below the photocuring station 24.

[0073] In practical applications, the pad printing robot 231 drives the pad printing head assembly 232 to perform the main actions. During the pad printing process, the ink scraping mechanism 235 prepares the ink for the pad printing operation. The pad printing head assembly 232 is driven by the pad printing robot 231 to be above the ink scraping mechanism 235 to pick up the ink. During the picking process, the air blowing structure can blow air onto the ink scraping mechanism 235 and the pad printing head assembly 232. The blowing air can evaporate the moisture in the ink, thereby achieving adjustment and control of the ink viscosity. After picking up the ink, the color mold is printed using the pad printing process. The guide component 25 is used to capture images of the execution end of the pad printing robot 231 to obtain image information of ink dipping and pad printing process. The control host processes and provides feedback based on the image information, and further outputs control signals to the pad micro-adjustment mechanism 233. The pad micro-adjustment mechanism 233, in conjunction with the pad printing robot 231, further fine-tunes the position and height of the two pad printing pad assemblies 232. After a single pad printing is completed, the cleaning mechanism 234 cleans the pad printing pad assembly 232; then the next color mold pad printing cycle begins.

[0074] The visual guidance component 25 acquires position information in real time for visual guidance, precisely controlling the dual-station pad printing head component 232 and fine-tuning the printing position; adapting to the pad printing of eyeglasses with different printing requirements. The added air blowing structure controls the ink viscosity during the ink dipping process, improving the quality of image writing and printing. The overall structure is compact, highly versatile, and comprehensively improves the quality and efficiency of contact lens pad printing.

[0075] In this embodiment, the visual guidance component 25 has a dual-camera layout and is mounted on a frame 251. One camera is located above the ink scraping mechanism 235, and the other camera is located above the tooling fixture 212 corresponding to the pad printing station 23. The dual-camera layout can more accurately obtain the position information of the pad printing robot 231's execution end, ensuring the accuracy of the pad printing robot 231's movements during the ink application and printing processes. Furthermore, with the auxiliary positioning and guidance of the guidance camera 236, the difficulty of adjusting and debugging the pad printing head assembly 232 of the dual-station execution end of the pad printing robot 231 is further reduced.

[0076] In this embodiment, each pad printing head assembly 232 includes a pad sensor 2324 mounted on the pad micro-adjustment mechanism 233, a pad fixing seat 2325 disposed at the end of the pad sensor 2324, and a pad printing head 2321 mounted at the end of the pad fixing seat 2325.

[0077] In this embodiment, the air blowing structure includes an air blowing ring 2322 disposed on the pad printing pad 2321 and located on the upper edge of the pad printing pad 2325; the lower end face of the air blowing ring 2322 is provided with a plurality of air blowing holes 2323; the upper ends of the plurality of air blowing holes 2323 are connected and connected to an external air source by an air blowing valve 2326.

[0078] The pad sensor 2324 is a tension / compression sensor that can collect the pad printing pressure applied by the pad printing head during operation, which helps to improve the transfer quality and display effect of the pattern; the air blowing ring 2322 is connected to an external air source through the air blowing valve 2326, and is supplied with air by the external air source. During the ink dipping process, the external air is blown out through the air blowing hole 2323 to control the evaporation of moisture in the ink on the doctor blade mechanism 235 and the pad printing head 2321, and to appropriately adjust the ink viscosity, thereby improving the quality of pad printing.

[0079] In this embodiment, the pad printing robot 231 is connected to the pad printing frame 2311 and the pad micro-adjustment mechanism 233. The pad micro-adjustment mechanism 233 includes a height fine-tuning slide 2331 vertically mounted on the pad printing frame 2311, a first translation slide 2332 horizontally mounted on the pad printing frame 2311, and a second translation slide 2333 mounted on the execution end of the first translation slide 2332. A pad printing pad assembly 232 is mounted on the execution end of both the second translation slide 2333 and the height fine-tuning slide 2331. The pad micro-adjustment mechanism 233, in conjunction with the pad printing robot 231, realizes the pad printing of the pad printing pad. The dual-station control of component 232; specifically, the pad printing robot 231 can adjust and control the overall position of the two pad printing head components 232 and the downward stroke during the pad printing operation; and adjust the relative position between the two pad printing head components 232 through the second translation slide 2333 at the execution end of the first translation slide 2332, and adjust the relative height between the two pad printing head components 232 through the height fine-tuning slide 2331; thereby achieving the adaptation of printing effects for various patterns; for the requirement of dual-station operation, it is only necessary to control the height position of one horizontal pad printing head component 232 and the other.

[0080] In this embodiment, the height fine-tuning slide 2331, the first translation slide 2332, and the second translation slide 2333 are all electric slides; the pad printing robot 231 is a high-precision Scara robot.

[0081] In this embodiment, the ink scraping mechanism includes a pad printing steel plate 2353, a base plate mounting seat 2353 for mounting the pad printing steel plate 2353, a pad printing ink cartridge 2352 that slides in contact with the pad printing steel plate 2353 and has a scraper at the bottom, and an ink cartridge drive cylinder 2351 that drives the pad printing ink cartridge 2352 to reciprocate. The ink drive cylinder 2351 is a reciprocating cylinder that drives the pad printing ink cartridge 2352 to reciprocate on the pad printing steel plate 2353. The scraper in the pad printing ink cartridge 2352 can scrape the pad printing steel plate 2353 to ensure that the ink is evenly spread on the pad printing steel plate 2353. The pad printing steel plate 2353 can be quickly replaced on demand on the base plate mounting seat 2354, improving the overall scalability of the pad printing operation.

[0082] Furthermore, the color mold full inspection device 26 includes an inspection carrier mechanism 261, an inspection displacement module 262 that drives the inspection carrier mechanism 261 to move back and forth, an optical inspection mechanism 263, an inspection frame plate 264, and an inspection stand 265 set on the inspection frame plate 264;

[0083] The optical inspection mechanism 263 includes a backlight structure 2631, a front light structure 2632, an inspection lifting module 2634 for driving the front light structure 2632 to rise and fall, and a vision camera 2633; the inspection displacement module 262 and the backlight structure 2631 are mounted on the inspection frame plate 264; the inspection lifting module 2634 is mounted on the inspection platform 265.

[0084] During the testing process, the rotary feeding mechanism 30 transports the color mold under the last photocuring station 24 to the testing transport mechanism 261. The testing transport mechanism 261 adjusts the static posture of the color mold to be tested. The testing displacement module 262 drives the testing transport mechanism 261 above the backlight structure 2631. The testing lifting module 2634 drives the front light structure 2632 to change the front light illumination height. The vision camera 2633 collects images of the color mold under different lighting conditions. After visual inspection of the collected images, the rotary feeding mechanism 30 transfers the color mold to the loading and unloading processing unit 10.

[0085] The backlight structure 2631 is a lamp board structure to achieve backlighting, while the front light structure 2632 is a wraparound lampshade structure that can accommodate various types of light beads as needed to simulate different lighting conditions.

[0086] In practical use, the testing carrier mechanism 261 carries the color mold to be tested transferred from the front-end equipment. After the color mold enters the testing carrier mechanism 261, the product is transported and adjusted to reach the predetermined posture. Then, the testing displacement module 262 moves the testing carrier mechanism 261 and the color mold to be tested together to the optical testing mechanism 263. The backlight structure 2631 provides backlight supplementary lighting from below the color mold. The displacement lifting module 2634 drives the positive light structure 2632 to change the predetermined height. During this period, the vision camera 2633 acquires image data of the color mold under different lighting conditions to complete the color difference detection. During the detection process, the displacement lifting module 2643 drives the testing carrier mechanism 261 to move, implementing parallel single-chip detection by dual cameras. Each camera detects one chip at a time, and one detection cycle completes the color mold detection of one fixture.

[0087] This contact lens product testing device is highly automated, integrating posture adjustment and visual inspection of the color mold to be inspected. By adjusting the incoming material, it can achieve the position and posture required for the specified inspection. The subsequent operation can be completed simply by transporting the color mold to the inspection carrier mechanism. It integrates a backlight structure and a highly controllable positive light structure, which can detect defects in the color mold, detect color difference space, and pattern color difference.

[0088] In this embodiment, the detection transport mechanism 261 includes a rotating mechanism 2611 and a pitch-changing mechanism 2612. The rotating mechanism 2611 is connected to the detection displacement module 262 via a detection displacement frame 2622, and the pitch-changing mechanism 2612 is installed at the output end of the rotating mechanism 2611. One end of the detection displacement frame 2622 is connected to the output end of the detection displacement module 262, and the other end is slidably installed on the displacement auxiliary rail 2621. The detection transport mechanism 261 is composed of the rotating mechanism 2611 and the pitch-changing mechanism 2612. One end of the detection displacement frame 2622 is connected to the output end of the detection displacement module 262, and the other end is slidably installed on the displacement auxiliary rail 2621 and driven by the detection displacement module 262 to drive the reciprocating movement of the rotating mechanism 2611.

[0089] In this embodiment, the pitch-changing mechanism 2612 includes a pitch-changing frame 2617 mounted on the output end of the rotating mechanism 2611, a pitch-changing cylinder 2613 mounted in the pitch-changing frame 2617, and a detection carrier plate 2616 slidably mounted on the pitch-changing frame 2617; the pitch-changing cylinder 2613 drives the detection carrier plate 2616 to slide and change pitch on the pitch-changing frame 2617; the pitch-changing cylinder 2613 is provided with a set of pitch-changing slides 2614 that move relative to each other, and each pitch-changing slide 2614 is in contact with the detection carrier plate 2616. A variable-pitch connecting frame 2615 is used for connection; the variable-pitch cylinder 2613 is a double-headed cylinder, with variable-pitch slides 2614 mounted on each head. The variable-pitch slides 2614 are connected to the detection carrier plate 2616 via the variable-pitch connecting frame 2615. The detection carrier plate 2616 is used to support the color mold to be tested. The variable-pitch cylinder 2613 drives the variable-pitch slides 2614, thereby pulling the detection carrier plate 2616 to adjust its position, ensuring that the spacing of the detection carrier plate 2616 is consistent with the spacing of the optical inspection mechanism 263.

[0090] In this embodiment, the detection carrier plate 2616 is provided with a pitch-changing guide wheel 2618, and the pitch-changing connecting frame 2615 is provided with a pitch-changing guide groove 2619. When pitch is changed, the pitch-changing guide wheel 2618 slides in the pitch-changing guide groove 2619. The pitch-changing connecting frame 2618 is an inclined connecting rod, and an inclined pitch-changing guide groove 2619 is opened on the connecting rod. The pitch-changing guide wheel 2618 of the detection carrier plate 2616 is set in the pitch-changing guide groove 2619. During the traction process, the longitudinal movement of the pitch-changing slide 2614 is changed into the lateral translation of the detection carrier plate 2616 by the pitch-changing guide groove 2619 in conjunction with the pitch-changing guide wheel 2618. Thus, the pitch of the detection carrier plate 2616 can be changed by opening and closing on both sides. To meet the needs of different products, only the detection carrier plate 2616 needs to be replaced to achieve the adaptation and coverage of various product size types.

[0091] In this embodiment, the displacement detection module 262 and the lifting detection module 2634 are both linear modules; the vision camera 2633 is a vision image detector; the rotation mechanism 2611 is a rotary motor or a rotary cylinder; and the variable pitch cylinder 2613 is a double-headed cylinder.

[0092] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the scope defined by the spirit of the invention.

Claims

1. A method for transferring color molds onto rotating contact lenses, characterized in that, It includes a loading and unloading processing unit (10), a rotary feeding mechanism (30), a jig rotation assembly (21), a surface treatment station (22), a pad printing station (23), a vision guidance assembly (25), a light curing station (24), and a color mold full inspection device (26); the process steps are as follows: S10, the loading and unloading processing unit (10) performs material discharge and dust removal of the color mold; S20, The color mold is transferred from the loading and unloading processing unit (10) to the jig rotation assembly (21) by the rotary feeding mechanism (30); S30, the jig rotation assembly (21) drives the color mold to rotate and pass through the surface treatment station (22), pad printing station (23) and light curing station (24). S40. The colored mold is first pre-treated by the surface treatment station (22); S50. After the pre-processing is completed, the color mold is positioned and guided by the visual guidance component (25) to assist in the movement of the pad printing station (23). The pattern printing and curing operation is completed through at least one ink printing by the pad printing station (23) and ink curing by the curing station (24). S60. After the final curing is completed, the pattern defects and color difference are detected by the color mold full inspection device (26); S70, The inspected color mold is transferred by the rotary feeding mechanism (30) to the loading and unloading processing unit (10) for marking and receiving; The pad printing station (23) includes two pad printing head assemblies (232), a head micro-adjustment mechanism (233) for fine-tuning the pad printing head assembly (232), a pad printing robot (231) for driving the head micro-adjustment mechanism (233), a doctoring mechanism (235) for providing ink to the pad printing head assembly (232), and a cleaning mechanism (234); the pad printing head assembly (232) is also provided with an air blowing structure; during pad printing, the air blowing structure blows air onto the pad printing head assembly (232) and the doctoring mechanism (235) to control the ink viscosity; The visual guidance component (25) has a dual-camera layout and is mounted on a rack (251). One camera is located above the ink scraping mechanism (235), and the other camera is located above the tooling fixture (212) corresponding to the pad printing station (23).

2. The method for transferring a rotating contact lens color mold according to claim 1, characterized in that, The loading and unloading processing unit (10) includes a loading mechanism (11) for providing color molds, a dust removal mechanism (12) for removing dust from the color molds to be printed, a laser marking mechanism (13) for marking the printed color molds, and a unloading mechanism (14) for collecting the printed color molds.

3. The method for transferring a rotating contact lens color mold according to claim 2, characterized in that, The feeding mechanism (11) and the dust removal mechanism (12) are connected through the feeding transfer mechanism (16), and the laser marking mechanism (13) and the unloading mechanism (14) are connected through the unloading transfer mechanism (17). The feeding mechanism (11) and the unloading mechanism (14) are both provided with a transplanting mechanism (15) on their sides for handling the colored mold.

4. The method for transferring a rotating contact lens color mold according to claim 1, characterized in that, The fixture rotation assembly (21) includes a rotating platform (211) and a plurality of workpieces (212) arranged at equal intervals on the rotating platform (211); the spacing between the surface treatment station (22), pad printing station (23) and curing station (24) is the same as the spacing between the workpieces (212).

5. The method for transferring a rotating contact lens color mold according to claim 1, characterized in that, In step S40, each pad printing station (23) is equipped with a corresponding visual guidance component (25) and a light curing component (24), and includes the following steps: S41. The color mold to be printed is moved to the bottom of the pad printing station (23) by the jig rotation assembly (21); S42. With the positioning assistance of the visual guidance component (25), the pad printing station (23) picks up the ink; S43. After dipping in ink, the printing station (23) moves to print the pattern on the color mold to be printed with the positioning assistance of the visual guidance component (25). S44. After printing is completed, the jig rotation assembly (21) moves the color mold to the light curing assembly (24) for curing. S45. After the curing is completed, the jig rotation assembly (21) will transfer the color mold and move the next color mold to be printed to the pad printing station (23) to start the next pad printing cycle.

6. The method for transferring a rotating contact lens color mold according to claim 5, characterized in that, During pad printing, the vision guidance component (25) guides and positions the pad printing robot (231). The pad printing robot (231) drives the pad micro-adjustment mechanism (233) and the pad printing pad assembly (232) installed at the end of the pad micro-adjustment mechanism (233) to work. The pad micro-adjustment mechanism (233) fine-tunes the actions of the pad printing pad assembly (232). The ink scraping mechanism (235) provides ink for the pad printing action of the pad printing pad assembly (232). The air blowing structure blows air onto the pad printing pad assembly (232) and the ink scraping mechanism (235) to control the ink viscosity. After a single pad printing is completed, the cleaning mechanism (234) cleans the pad printing pad assembly (232), and the printed color mold enters the curing station (24) below.

7. The method for transferring a rotating contact lens color mold according to claim 1, characterized in that, The color mold full inspection device (26) includes an inspection carrier mechanism (261), an inspection displacement module (262) that drives the inspection carrier mechanism (261) to move back and forth, an optical inspection mechanism (263), an inspection frame plate (264), and an inspection stand (265) set on the inspection frame plate (264). The optical inspection mechanism (263) includes a backlight structure (2631), a front light structure (2632), an inspection lifting module (2634) for driving the front light structure (2632) to rise and fall, and a vision camera (2633); the inspection displacement module (262) and the backlight structure (2631) are mounted on the inspection frame plate (264); the inspection lifting module (2634) is mounted on the inspection platform (265); During the testing process, the rotary feeding mechanism (30) transports the color mold under the last light curing station (24) to the testing transport mechanism (261). The testing transport mechanism (261) adjusts the static posture of the color mold to be tested. The testing displacement module (262) drives the testing transport mechanism (261) above the backlight structure (2631). The testing lifting module (2634) drives the front light structure (2632) to change the front light illumination height. The vision camera (2633) collects images of the color mold under different lighting environments. After visual inspection of the collected images, the rotary feeding mechanism (30) transfers the color mold to the loading and unloading processing unit (10).

8. The method for transferring a rotating contact lens color mold according to claim 7, characterized in that, The detection carrier mechanism (261) includes a rotating mechanism (2611) and a pitch-changing mechanism (2612). The rotating mechanism (2611) is connected to the detection displacement module (262) via a detection displacement frame (2622). The pitch-changing mechanism (2612) is installed at the output end of the rotating mechanism (2611). One end of the detection displacement frame (2622) is connected to the output end of the detection displacement module (262), and the other end is slidably installed on the displacement auxiliary rail (2621). The pitch-changing mechanism (2612) includes a pitch-changing frame (2617) installed at the output end of the rotating mechanism (2611), a pitch-changing cylinder (2613) installed in the pitch-changing frame (2617), and a detection carrier plate (2616) slidably installed on the pitch-changing frame (2617). The pitch-changing cylinder (2613) drives the detection carrier plate (2616) to slide and change pitch on the pitch-changing frame (2617).

9. The method for transferring a rotating contact lens color mold according to claim 8, characterized in that, The variable pitch cylinder (2613) is provided with a set of relatively moving variable pitch slides (2614), each of the variable pitch slides (2614) is connected to the detection carrier plate (2616) by a variable pitch connecting frame (2615); the detection carrier plate (2616) is provided with a variable pitch guide wheel (2618), and the variable pitch connecting frame (2615) is provided with a variable pitch guide groove (2619); when the pitch is changed, the variable pitch guide wheel (2618) slides in the variable pitch guide groove (2619).

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