Rotary contact lens color mold transfer printing method and system

Abstract

The invention relates to the technical field of contact lens automatic production, in particular to a rotary contact lens color mold transfer printing method and system, and the method comprises the following specific steps: S10, discharging of a mold; s20, carrying out pad printing pretreatment; s30, the connection device is ferried to a transfer printing area; s40, ink printing and ink light curing are conducted, pattern printing is completed, and a color mold is obtained; s50, curing is finished, and the connection device is ferried to the supply area again; s60, pattern defect and color difference detection; s70, the mold is transferred to a discharging mechanism; according to the invention, rapid switching of mold material operation stations is realized; a working area is subjected to centralized layout, and partition rapid switching ferrying is realized through a connection device, so that the overall working efficiency is improved; the defects that the thread is long and the occupied space is large are overcome, and the defects that under the rotary layout, the space of the center area of a rotary disc is wasted, and mold circulation is achieved through multiple kinds of transfer equipment are overcome; and the quality of printed patterns is improved, color difference flaws are detected in time, and the good product and processing efficiency of mold transfer printing work are integrally improved.

Description

Technical Field

[0001] The invention relates to the technical field of automated production of contact lenses, and in particular to a rotary contact lens color mold pad printing method and system. Background Art

[0002] Colored contact lenses (cosmetic lenses) have patterns of various colors on their irises. During the manufacturing process, there are usually a variety of methods for printing patterns on colored glasses, among which mold (concave mold) pad printing is a commonly used method;

[0003] At present, there are many types of equipment for contact lens mold pad printing, but all of them have certain defects and shortcomings; 1. Some equipment pursues cost-effectiveness and adopts equidistant transport mechanism to achieve it, which is relatively simple to implement, but the synchronous printing color does not support visual automatic alignment, and the products produced often have pad printing offset defects; 2. Another type of equipment has a relatively high degree of automation and has a visual automatic alignment function, but its performance in color difference detection is average, and it adopts a single linear layout. Its equipment operation and maintenance are not friendly. There are also equipment with a rotary layout, which causes waste of space in the middle of the turntable, and it is also easy to cause waste for the layout of the site. Summary of the invention

[0004] The purpose of the present invention is to provide a high degree of automation, rotary layout,

[0005] , integrated pad printing defect color difference detection and vision-guided contact lens mold pad printing device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A rotary contact lens color mold pad printing method includes a rotary unit, one side of the rotary unit is a supply area, and the other side is a pad printing area; the pad printing area is provided with at least one group of pad printing stations and light curing stations; the rotary unit includes at least two rotary devices, a rotary rotor, and a docking device; each of the rotary rotors is equipped with a mold carrier; a plurality of transfer and handling mechanisms are set up above the rotary device, and the specific method steps are as follows:

[0008] S10. The loading assembly discharges the mold; the transfer mechanism transfers the mold to the mold carrier in the supply area;

[0009] S20. The rotary device drives the rotary rotor to move the mold carrier to the pre-processing position for pre-dust removal and surface treatment;

[0010] S30. After dust removal and surface treatment are completed, the mold carrier is transferred to the rotary device of the pad printing area by the docking device;

[0011] S40. A visual guidance component is used to assist in positioning the movement of the pad printing station, and the pattern printing and curing operation is completed by at least one ink printing of the pad printing station and the ink light curing of the light curing station. After the mold pad printing is completed, a color mold is obtained;

[0012] S50. After the last curing is completed, the mold carrier is ferryed to the supply area again by the docking device;

[0013] S60. The rotary device moves the mold carrier to the bottom of the full inspection component to perform defect detection on the color mold;

[0014] S70. The transfer and handling mechanism transfers the inspected mold to the unloading mechanism;

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention realizes the rapid switching of the working stations of the mold materials through the rotary flow conveying mode; the supply area and the pad printing area are divided to centrally arrange the working area, and the rapid switching and ferrying of the partitions are realized through the docking device, thereby improving the overall work efficiency; this layout not only improves the shortcomings of the traditional linear layout, such as the long thread length and large space occupation, but also avoids the waste of space in the center area of ​​the turntable under the rotary layout, and the defect of requiring multiple transfer equipment to realize the mold circulation; in the pattern printing operation, the visual guidance component and the full inspection component are adopted to improve the quality of the printed pattern, timely detect the color difference defects, and improve the overall quality and processing efficiency of the mold pad printing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a top view of the overall structure of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the rotary unit of the present invention;

[0020] Figure 4 This is a partial enlarged schematic diagram of point A of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the rotary rotor of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the transfer and transport mechanism of the present invention;

[0023] Figure 7 The overall structure of the feeding assembly of the present invention;

[0024] Figure 8 A side view of a feeding assembly of the present invention;

[0025] Fig. 9 It is a schematic oblique rear view of the feeding assembly of the present invention;

[0026] Fig.10 It is a structural schematic diagram of the surface treatment mechanism of the present invention;

[0027] Fig.11 It is a structural schematic diagram of the pad printing station of the present invention;

[0028] Fig.12 It is a structural schematic diagram of the micro-motion adjustment mechanism of the rubber head of the present invention;

[0029] Fig.13 It is a cross-sectional view of the structure of the pad printing rubber head assembly of the present invention;

[0030] Fig.14 It is a schematic structural diagram of the full inspection component of the present invention. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] refer to Figure 1-14 As shown, it includes a rotary unit 30, one side of the rotary unit 30 is a supply area 301, and the other side is a pad printing area 302; the rotary unit 30 includes at least two rotary devices 31, a rotary rotor 32, and a docking device; each of the rotary rotors 32 is installed with a mold carrier 33; a plurality of transfer and handling mechanisms 60 are set up above the rotary device 31, and the specific method steps are as follows:

[0033] S10. The feeding mechanism 10 discharges the mold; the transfer mechanism 60 transfers the mold to the mold carrier 33 in the supply area;

[0034] S20. The rotary device 31 drives the rotary rotor 32 and then drives the mold carrier 33 to move to the pre-processing position for pre-dust removal and surface treatment;

[0035] S30. After dust removal and surface treatment are completed, the docking device transfers the mold carrier 33 to the rotary device 31 in the pad printing area;

[0036] S40. The visual guidance component 401 is used to assist in positioning the action of the pad printing station 40, and the pattern printing and curing operation is completed by at least one ink printing of the pad printing station 40 and the ink light curing of the light curing station 50, and the color mold is obtained after the mold pad printing is completed;

[0037] S50. After the last curing is completed, the mold carrier 33 is ferryed to the supply area again by the docking device;

[0038] S60. The rotating device 31 moves the mold carrier 33 to the bottom of the full inspection component 70 for pattern defect and color difference detection;

[0039] S70. The transfer mechanism 60 transfers the inspected mold to the unloading mechanism;

[0040] The light curing mechanism 50 is a UV curing device, which is used to cure the printed pattern of the front pad printing station 40 to improve the printing quality of the pattern;

[0041] In actual use, the rotary unit 30 is used for the circulation and driving of the mold, and is responsible for circulating the mold to be printed with patterns to various processing stations to complete the transfer of the mold; the rotary unit 30 divides the working area into two sides, one side is the supply area, in which the feeding mechanism 10 is used to provide materials, the full inspection component 70 is used to detect the pattern printing quality and color difference, and the receiving component 90 is used to receive the printed mold; the other side is the printing area, which is used to perform multiple pattern printing operations as needed, and each printing is completed by a group of pad printing stations 40 and light curing mechanisms 50;

[0042] The rotary device 31 can drive the rotary rotor 32 to move a predetermined distance, thereby driving the mold carrier 33 to move in a controllable manner; the transfer and transport mechanism 60 is mounted above the rotary device 31 and is correspondingly arranged on the side of the feeding mechanism 10 and the receiving assembly 90, and is used to assist in transporting the mold, ensuring the transfer and transport of the mold between the mold carrier 33 and the feeding mechanism 10 and the receiving assembly 90 in the supply area;

[0043] During the specific pad printing operation, the feeding mechanism 10 supplies the mold to be printed. After the mold reaches the predetermined position, the transfer and transport mechanism 60 on the side of the feeding mechanism 10 transfers the mold to the mold carrier 33. The rotary device 31 drives the mold carrier 33 to run to the end of the supply area. The docking device drives the mold carrier 33 to switch the corresponding rotary device 31, and then the mold carrier 33 switches between the supply area and the pad printing area. The mold carrier 33 performs multiple pattern printing in the pad printing area. Each printing is performed by the corresponding visual guidance component (401) corresponding to the auxiliary pad printing station 40. After the first printing is completed, the pattern is cured by the light curing mechanism 50 to ensure the quality of printing; after the last printing and curing are completed, the docking device drives the mold carrier 33 to be transferred to the supply area again; the rotary device 31 drives the mold carrier 33 to run to the full inspection component 70 for pattern quality and color difference inspection, and then the transfer and transportation mechanism 60 on the side of the receiving component 90 transports the mold from the mold carrier 33 to the receiving component 90 to complete a complete pattern printing operation; the rotary device 31 is equipped with and drives a plurality of rotary rotors 32, thereby realizing the continuous operation of multiple groups of mold carriers 33;

[0044] The rotary contact lens color mold transfer printing method realizes the rapid switching of the working station of the mold material through the rotary flow conveying mode; the supply area 301 and the transfer printing area 302 are divided to centrally arrange the work area, and the rapid switching and ferrying of the partitions are realized through the docking device, thereby improving the overall work efficiency; this layout not only improves the shortcomings of the traditional linear layout of long thread length and large space occupation, but also avoids the waste of space in the center area of ​​the turntable under the rotary layout, and the defect of requiring multiple transfer equipment to realize the mold flow; in the pattern printing operation, the visual guidance component 401 and the full inspection component are used to improve the quality of the printed pattern, timely detect color and color difference defects, and overall improve the quality and processing efficiency of the mold transfer work

[0045] In this embodiment, the feeding mechanism 10 includes a barrel assembly 11 for placing the mold, a material handling assembly 13 for picking up and placing the mold, and a height adapter assembly 12 for adjusting the height of the mold receiving and feeding material; the barrel assembly 11 includes a rotating barrel 112, a barrel drive 111 for driving the rotating barrel 112 to rotate, a push rod 114 for pushing the mold inside the rotating barrel 112, and a push rod module 113 for driving the push rod 114 to rise and fall;

[0046] During the loading action, the push rod module 113 drives the push rod 114 to extend into the rotating barrel 112, pushing the mold to the transport position of the material handling component 13, the material handling component 13 absorbs the mold and places it on the height adaptation component 12, and the height adaptation component 12 suspends the mold at a specified height to wait for subsequent actions; during the unloading action, the external component places the mold on the height adaptation component 12, the height adaptation component 12 lifts the mold to the working position of the material handling component 13, the material handling component 13 absorbs the mold and places it in the rotating barrel 112, and the push rod module 113 drives the push rod 114 to support the mold and gradually descend;

[0047] Specifically, the feeding mechanism 10 and the receiving assembly 90 have the same structural features and only differ in function. The two adopt the same technical features.

[0048] In actual use, it can be freely selected for loading or unloading according to layout requirements; in the loading action, the rotating barrel 112 is used as the feeding part to temporarily store the mold, and the push rod module 113 is a linear motor, which is used to drive the push rod 114 to extend into the rotating barrel 112, and can push the mold in the rotating barrel 112 to rise, so that the uppermost mold is always located at the starting transport position of the material handling component 13; the transport component 13 sucks the mold from the rotating barrel 112 and transports it to the height adaptation component 12, and the height adaptation component 12 moves the mold to a height that matches the external assembly line or other turnover components; improve the overall loading efficiency and ensure that the loading stage can adapt to various types of equipment layouts; in the unloading action, the overall process is that the mold is collected to the rotating barrel 112, and then the mold is transported to the height adaptation component 12. In the rotating barrel 112, after the external assembly line or other turnover components place the mold on the height adaptation component 12, the height adaptation component 12 moves the mold to the working position height of the conveying component 13, and the conveying component 13 conveys the mold to the rotating barrel 112. During the mold collection process, the push rod module 113 drives the push rod 114 to gradually descend, reserving placement space for each mold to be collected; the overall structure is streamlined, and functional differentiation can be carried out as needed to meet the requirements of loading and unloading actions; the cylinder-type temporary storage of materials makes rational use of the longitudinal space, reduces the area occupied by equipment, and improves the overall loading and unloading efficiency, and is equipped with a height adjustment structure to meet and adapt to various types of material conveying structures, thereby improving the overall adaptability of the loading and unloading mechanism.

[0049] In this embodiment, the rotating barrel 112 includes a plurality of barrel groups 1121, and the bottoms of the barrel groups 1121 are all installed on a rotating base plate 1122, and the barrel drive 111 drives the rotating base plate 1122 to rotate; the present application adopts a double barrel group 1121 design, which is centrally symmetrically installed on the rotating base plate 1122; when the mold in one barrel group 1121 is completed or fully stored, the barrel drive 111 is used to rotate the rotating base plate 1122, and the other group of rotating barrels 1121 is rotated again to the working position of the conveying structure 13, so as to realize one backup and one use of the barrel group 1121; the barrel group 1121 can be adjusted in multiple groups according to the actual working conditions, thereby improving the production capacity release of one-time loading and unloading and the adjustment of product storage capacity.

[0050] In this embodiment, a push rod through hole 1123 is provided on the rotating base plate 1122 corresponding to the bottom of the barrel group 1121, which is convenient for the push rod 114 to extend into the barrel group 1121. The diameter of the push rod through hole 1123 is smaller than the diameter of the mold; the height of the barrel group 1121 matches the installation height of the material handling assembly 13; the push rod 114 enters the barrel group 1121 through the push rod through hole 1123, and the mold can be smoothly stored or taken out in the barrel group 1121 that matches its size. The diameter of the push rod through hole 1123 is smaller than the mold to prevent the mold from falling out of the barrel group 1121; the push rod 114 is driven by the push rod module 113 to push the mold up and down to meet the different height changes of the mold material during the loading and unloading processes.

[0051] In this embodiment, the material handling assembly 13 includes a material handling suction cup 135, a material handling frame plate 132 for assembling the material handling suction cup 135, and a material handling drive 131 for driving the material handling frame plate 132; the material handling suction cup 135 is connected to the material handling frame plate 132 by a material handling guide rod 134; in this embodiment, a suction cup push cylinder 133 for pushing the material handling suction cup 135 downward is also installed on the material handling frame plate 132, and the telescopic end of the suction cup push cylinder 133 passes through the material handling frame plate 132 and is connected to the material handling suction cup 135, and the material handling suction cup 135 is connected to an external air source; the material handling suction cup 135 is a multi-head suction cup, which is connected to an external air source to adsorb the mold, and the suction cup push cylinder 133 is used to control the downward exploration height of the material handling suction cup 135, and the material handling guide rod 134 ensures that the material handling suction cup 135 can slide smoothly with the material handling frame plate 132 to ensure that the material handling suction cup 135 can completely adsorb the mold.

[0052] In this embodiment, the material handling drive 131 is supported and installed by a material handling frame 136, and the height adaptation component 12 is installed on the material handling frame 136; in this embodiment, the height adaptation component 12 includes a height-adjusting film frame 121 for temporarily storing molds and a height adaptation drive 122 for driving the height-adjusting film frame 121 to rise and fall; the height-adjusting film frame 121 is installed at the moving end of the height adaptation drive 122, and the placement holes opened in the height-adjusting film frame 121 correspond to the material handling suction cup 135; the height adaptation drive 122 is a linear motor module, which is installed on the material handling frame 126 and is used to drive the height-adjusting film frame 121 to rise and fall; the height-adjusting film frame 121 is movably installed at the moving end of the moving end of the height adaptation drive 122, and can be quickly replaced according to the material handling suction cup 135 or the rear-end conveying equipment as needed; ensuring that the mold can be quickly turned over between the handling component 13 and the conveying equipment; and adapting to more equipment layout types and conveying equipment of various heights and sizes through the height adaptation component 12.

[0053] In this embodiment, in the supply area 301, according to the mold flow direction, the rear end of the feeding mechanism 10 is further provided with a dust removal component 21 and a surface treatment mechanism 22 for dust removal of the mold to be printed, and S20 also includes:

[0054] S21. The mold enters the dust removal station 21 for dust removal under the operation of the mold carrier 33;

[0055] S22. After dust removal, the mold carrier 33 moves the mold to the surface treatment mechanism 22 station for corona treatment; in the supply area 301, the dust removal component 21 can absorb dust from the mold to be printed to prevent dust or other foreign particles from affecting the pattern printing effect. The surface treatment mechanism 22 is a corona component, which can promote the surface oxidation of the mold to be printed, moderately increase the roughness, and contribute to the display effect of the pattern printing.

[0056] The dust removal component 21 is a pneumatic dust blowing device, which is connected to an external air source and blows air to the mold on the mold carrier 33 to blow away the attached dust or other particulate impurities.

[0057] In this embodiment, the surface treatment mechanism 22 includes a corona positive electrode head 225, a corona drive 223 for driving the corona positive electrode head 225 to rise and fall, a corona negative electrode group 227 installed below the corona positive electrode head 225, a corona support plate 222 for carrying the mold, and a support plate drive 221 for driving the corona support plate 222; one end of the corona support plate 222 is supported by an auxiliary rail, and the support plate drive 221 is connected to and drives the other end of the corona support plate 222; the corona support plate 222 travels back and forth between the transfer and handling mechanism 60 and the bottom of the corona positive electrode head 225;

[0058] The surface treatment mechanism 22 is a corona assembly. When performing the treatment operation, the rotary unit 30 transfers the mold to the bottom of the transfer and transport mechanism 60 on the side of the surface treatment mechanism 22, and the transfer and transport mechanism 60 transfers the mold to the corona pallet 222. The pallet drive 221 drives the corona pallet 222 to move to the treatment station; the corona negative electrode group 227 is pushed up by the negative electrode cylinder 226, and the corona positive electrode head 225 is pushed down by the corona drive 223. After the positive and negative electrodes are in contact with the mold, corona treatment is performed to increase the surface roughness of the mold, so as to improve the quality of subsequent mold pattern printing work.

[0059] In this embodiment, the docking device includes a docking module 35 and a rotary drive 34 for driving the docking module 35 to move; the rotary device 31 and the docking module 35 are both magnetically driven linear motors; the two rotary devices 31 are arranged in parallel, and the rotary drive 34 drives the docking module 35 to realize alternating ferrying with the rotary device 31;

[0060] During the rotation process, each of the rotating devices 31 is driven in one direction, driving the rotating rotor 32 to move to the docking module 35, and then the turnover drive 34 drives the docking module 35 to move to another rotating device 31 that moves in the opposite direction, so as to realize the turnover of the film carrier 33; the rotating device 31 is the main turnover track, and a plurality of rotating rotors 32 are slidably mounted on the rotating device 31, and the rotating rotor 32 is driven, and then the turnover drive 34 controls the movement of the docking module 32, so that the rotating rotor 32 running to the end realizes the docking and ferrying action, and is rotated to another rotating device 31, so as to realize the rapid and stable turnover rotation of the film carrier 33;

[0061] In this embodiment, the rotating device 31 and the docking module 35 are both magnetically driven linear motors; the rotating device 31 is arranged in parallel, and the turnover drive 34 drives the docking module 35 to achieve alternating ferrying with the rotating device 31; the magnetically driven linear motor has a small overall size, runs smoothly, and can freely select a stroke to drive the rotating stator 32, thereby realizing the hovering of the film carrier 33 installed on the rotating stator 32 at a predetermined position; the rotating device 31 is arranged in parallel, and the installation direction of the turnover drive 34 is perpendicular to the rotating device 31, ensuring that the turnover drive 34 drives the docking module 35 to smoothly dock and ferry with the rotating device.

[0062] In this embodiment, the rotating device 31 and the docking module 35 only differ in the driving stroke, and the other parameters are matched with each other; in this embodiment, the tops of the rotating device 31 and the docking module 35 are both installed with auxiliary upper rails 311, and the side end faces are both provided with auxiliary side rails 312; the rotating rotor 32 adopts the auxiliary upper rails 311 and the auxiliary side rails 312 to realize sliding assembly; the rotating device 31 and the docking module 35 are both provided with auxiliary upper rails 311 and auxiliary side rails 312 to realize the smooth operation of the rotating rotor 32.

[0063] In this embodiment, the rotary rotor 32 is an L-shaped plate; the auxiliary upper rail 311 and the auxiliary side rail 312 are both installed on the inner wall of the L-shaped plate, and the top of the L-shaped plate is connected to the film-bearing carrier 33; the rotary rotor 32 is also installed with an anti-roll plate 323; on the basis of the double sliding rails of the auxiliary upper rail 311 and the auxiliary side rail 312 to ensure stable operation, the addition of the anti-roll plate 323 can further avoid accidental tilting of the rotary rotor 32 during operation, thereby ensuring the safety of the conveying operation of the film-bearing carrier 33.

[0064] In this embodiment, the film carrier 33 includes a carrier plate 331 installed on the rotary rotor 32, and a mold fixture 334 for positioning the mold; an opening and closing paddle 333 is provided at the bottom of the mold fixture 334; the carrier plate 331 is provided with a fixture avoidance hole 332; the mold fixture 334 is used to place the mold that needs color film pad printing, and the mold fixture 334 is a movable fixture, which can be unlocked and locked by operating the opening and closing paddle 333 to avoid the displacement or falling of the mold during transportation; the carrier plate 331 is provided with a fixture avoidance hole 332 to reduce weight and avoid the opening and closing paddle 333;

[0065] In this embodiment, it also includes an unlocking component 36 and a fill light component 37 arranged on the inner side of the rotating device 31; in this embodiment, the unlocking component 36 is a thin pneumatic finger; the unlocking component 36 is set as needed to achieve locking and unlocking of the film carrier 33, so as to facilitate the transportation of the mold at the loading mechanism 10, the unloading mechanism 90 and the surface treatment mechanism 22; the fill light component 37 is used to assist the pad printing station 40 and the full inspection component 70 in related actions to perform light compensation.

[0066] In this embodiment, the pad printing station 40 includes two pad printing rubber head assemblies 42, a pad head fine adjustment mechanism 43 for fine-tuning the pad printing rubber head assemblies 42, a pad printing robot 41 for driving the pad head fine adjustment mechanism 43 to move, an ink scraping mechanism 45 for providing ink to the pad printing rubber head assemblies 42, and a cleaning mechanism 44; the pad printing rubber head 42 is also provided with an air blowing structure;

[0067] During the pad printing operation, the visual guidance component 401 guides and positions the pad printing manipulator 41, and the pad printing manipulator 41 drives the pad head fine-motion adjustment mechanism 43 and the pad printing rubber head component 42 installed at the end of the pad head fine-motion adjustment mechanism 43, and the pad head fine-motion adjustment mechanism 43 further fine-tunes the pad printing action of the pad printing rubber head component 42 in terms of level and height; the ink scraping mechanism 45 provides ink for the pad printing action of the pad printing rubber head component 42, and the air blowing structure blows air to the pad printing rubber head component 42 and the ink scraping mechanism 45 to control the ink viscosity; after a single pad printing is completed, the cleaning mechanism 44 cleans the pad printing rubber head component 42, and the printed mold enters the bottom of the light curing mechanism 50;

[0068] In actual application, the pad printing robot 41 drives the pad printing rubber head assembly 42 to perform the main action. During the pad printing process, the ink scraping mechanism 45 prepares the ink for the pad printing operation, and the pad printing rubber head assembly 42 is driven by the pad printing robot 41 to the top of the ink scraping mechanism 45 to dip the ink; during the dipping process, the air blowing structure can blow air to the ink scraping mechanism 45 and the pad printing rubber head assembly 42, and the blowing can volatilize the water in the ink, thereby realizing the adjustment and control of the ink viscosity; after dipping the ink, the pad printing of the mold to be printed is carried out; the visual guidance component (401) 25 is used to capture the image of the execution end of the pad printing robot 41 to obtain image information of the ink dipping and pad printing process. The control host processes and feeds back the image information, and further outputs the control signal to the pad head fine-motion adjustment mechanism 43. The pad head fine-motion adjustment mechanism 43 combines with the pad printing robot 41 to further fine-tune the position and height of the two pad printing rubber head assemblies 42. After a single pad printing is completed, the cleaning mechanism 44 cleans the pad printing rubber head assembly 42; and then the pad printing work cycle of the next mold to be printed is carried out;

[0069] The visual guidance component 401 obtains the position information in real time, performs visual guidance, and accurately controls the double-station pad printing rubber head component 42 and fine-tunes the printing color position; in order to adapt to the pad printing of eyeglass molds with different printing requirements, the added air blowing structure can control the ink viscosity during the ink dipping process, improve the pattern writing quality and color quality, the overall structure is exquisite, and the versatility is strong, which improves the overall contact lens pad printing quality and efficiency.

[0070] In this embodiment, the visual guidance component 401 includes a first camera 46 for pad printing positioning and a second camera 47 located above the ink scraper mechanism 45; the first camera 46 and the second camera 47 are both hoisted by a visual frame 48; a visual guidance component 401 is correspondingly arranged above each pad printing station 40; the dual-camera layout can more accurately obtain the position information of the execution end of the pad printing robot 41, ensuring the accuracy of the movement of the pad printing robot 41 during the ink dipping process and the printing process; and through the auxiliary positioning and guidance of the guiding camera 46, the difficulty of adjusting and debugging the double-station pad printing rubber head assembly 42 at the execution end of the pad printing robot 41 is further reduced.

[0071] In this embodiment, each of the pad printing rubber head components 42 includes a rubber head sensor 424 installed on the rubber head fine-motion adjustment mechanism 43, a rubber head fixing seat 425 arranged at the end of the rubber head sensor 424, and a pad printing rubber head 421 installed at the end of the rubber head fixing seat 425;

[0072] In this embodiment, the air blowing structure includes an air blowing ring 422 disposed on a rubber head fixing seat 425 and located on the upper edge of a pad printing rubber head 421; a plurality of air blowing holes 423 are formed on the lower end surface of the air blowing ring 422; the upper ends of the plurality of air blowing holes 423 are connected and connected to an external air source by an air blowing valve 426;

[0073] The pad head sensor 424 is a tensile pressure sensor, which can collect the pad printing pressure applied by the pad printing pad during operation, which helps to improve the transfer quality and display effect of the pattern; the air blowing ring 422 is connected to the external air source through the air blowing valve 426, and the air is supplied by the external air source. During the ink dipping process, the external gas is blown out through the air blowing hole 423 to control the volatilization of water in the ink scraping mechanism 45 and the pad printing pad 421, and appropriately adjust the ink viscosity, thereby improving the quality of pad printing.

[0074] In this embodiment, the pad printing robot 41 is connected to the pad printing frame 411 with the pad head fine-motion adjustment mechanism 43, and the pad head fine-motion adjustment mechanism 43 includes a height fine-adjustment slide 431 vertically installed on the pad printing frame 411, a first translation slide 432 horizontally installed on the pad printing frame 411, and a second translation slide 433 installed on the execution end of the first translation slide 432; the execution ends of the second translation slide 433 and the height fine-adjustment slide 431 are each installed with a pad printing rubber head assembly 42; the pad head fine-motion adjustment mechanism 43 cooperates with the pad printing robot 41 to realize the pad printing rubber head assembly 4 2 double-station control; the specific pad printing robot 41 can adjust and control the overall position of the two pad printing rubber head assemblies 42 and the downward pressure stroke during the pad printing operation; and adjust the relative position between the two pad printing rubber head assemblies 42 through the second translation slide 433 at the execution end of the first translation slide 432, and adjust the relative height between the two pad printing rubber head assemblies 42 through the height fine-tuning slide 431; thereby achieving adaptation to the printing effects of various patterns; for the need for double-station operation, it is only necessary to control the height position of one of the horizontal position pad printing rubber head assemblies 42 and the other.

[0075] In this embodiment, the height fine-tuning slide 431 , the first translation slide 432 and the second translation slide 433 are all electric slides; and the pad printing robot 41 is a high-precision Scara robot.

[0076] In this embodiment, the ink scraping mechanism includes a pad printing steel plate 453, a bottom plate mounting seat 454 for mounting the pad printing steel plate 453, a pad printing ink cartridge 452 which is in sliding contact with the pad printing steel plate 453 and has a scraper at the bottom, and an ink cartridge driving cylinder 451 which drives the pad printing ink cartridge 452 to reciprocate; the ink driving cylinder 451 is a reciprocating cylinder, which can drive the pad printing ink cartridge 452 to reciprocate on the pad printing steel plate 453. The scraper in the pad printing ink cartridge 452 can scrape the pad printing steel plate 453 to ensure that the ink is evenly spread on the pad printing steel plate 453; the pad printing steel plate 453 can be quickly replaced on the bottom plate mounting seat 454 as needed to improve the expandability of the overall pad printing work.

[0077] In this embodiment, in the supply area 301, a laser marking component 80 is further provided between the full inspection component 70 and the unloading mechanism 90 for marking the mold after inspection and identification; S60 also includes:

[0078] S61. After the color difference detection of the full inspection component 70 is completed, the mold enters the laser marking component 80 under the operation of the mold carrier 33 to mark the defective products; the laser marking component 80 can perform laser marking on the mold after the full inspection, which is helpful for subsequent further sorting work.

[0079] In this embodiment, the full inspection component 70 includes a full inspection base 76 installed on the side of the rotating unit 30 and a full inspection camera 71 installed on the full inspection base 76 using a full inspection bracket 711. The full inspection base 76 is also provided with a full inspection drive 73, and the execution end of the full inspection drive 73 is connected to a fill light cover 72; the full inspection bracket 711 is provided with a camera cover 75; the full inspection component 70 performs color pattern quality and color difference detection on the mold that has been transferred from the rotating unit 30 and has completed pad printing; the full inspection camera 71 is used to acquire patterns and colors. In this process, the fill light cover 72 is pushed down by the full inspection drive 73, so that the mold to be inspected can be better filled with light, and a camera cover 75 is added externally to prevent other external light from interfering with the image acquisition of the full inspection camera 71.

[0080] In this embodiment, the transfer transport mechanism 60 includes a transfer transport drive 61 which is mounted above the rotating device 31 using a transfer bracket 66, and the execution end of the transfer transport drive 61 is provided with a transfer mounting plate 63, and the transfer mounting plate 63 is movably suspended with a transfer suction cup group 65 using a suction cup guide rod 641, and a transfer downward drive 62 for driving the transfer suction cup group 65 is installed on the transfer mounting plate 63; during transfer transport, the transfer transport drive 61 drives the transfer mounting plate 63 to travel back and forth in the working area; after the transfer mounting plate 63 reaches the transport position, the transfer downward drive 62 drives the transfer suction cup 65 to move downward and upward to complete the grabbing and placement of the mold, thereby realizing the flow of the color film between the rotating unit 30 and the supply area.

[0081] Specifically, a transfer and transport mechanism 60 is provided on the side of the feeding mechanism 10, the receiving assembly 90, and the surface treatment mechanism 22. The transfer and transport drive 61 is a linear motor, which is mounted above the rotating device 31 through a transfer bracket 66. One end of the transfer mounting plate 63 is slidably mounted on the transfer bracket 66 using an auxiliary rail, and the other end is driven by the transfer and transport drive 61. Driven by the transfer and transport drive 61, the transfer mounting plate 63 carries the transfer suction cup 65 to and fro between the workstations above the rotating device 31 and the supply area, thereby completing the transportation and transfer of the mold and improving the material transfer speed between the processing station and the rotating unit 30.

[0082] A rotary contact lens color mold pad printing system is used to implement a rotary contact lens color mold pad printing method, comprising a rotary unit 30 for circulating the mold, one side of the rotary unit 30 is a supply area 301 for auxiliary mold materials, and the other side is a pad printing area 302 for printing mold patterns; the supply area 301 is provided with a feeding mechanism 10, a material receiving component 90, a dust removal component 21, a surface treatment mechanism 22 and a laser marking component 80; the pad printing area is provided with a pad printing station 40 and a light curing component 50; the feeding mechanism 10, the material receiving component 90 and the surface treatment mechanism 22 all use a transfer and handling mechanism 60 to realize the interaction of the mold with the rotary unit 30.

[0083] A rotary contact lens color mold pad printing method includes a rotary unit 30 for driving the mold to be printed to rotate, one side of the rotary unit 30 is a supply area, which is provided with a feeding mechanism 10, a receiving assembly 90 and a full inspection assembly 70; the other side of the rotary unit 30 is a pad printing area, which is provided with a plurality of pad printing stations 40 for printing patterns on the mold to be printed and a light curing mechanism 50 for curing ink;

[0084] The rotary unit 30 includes a rotary device 31, a plurality of rotary rotors 32 mounted on the rotary device 31, and a docking device mounted at the end of the rotary device 31 for ferrying the rotary rotors 32; each rotary rotor 32 is mounted with a mold carrier 33 for placing a mold; a plurality of transfer and transport mechanisms 60 for transporting the mold are mounted above the rotary device 31;

[0085] During the pad printing operation, the transfer and transport component 60 transfers the mold to be printed from the loading mechanism 10 to the mold carrier 33, and the rotating device 31 drives the mold carrier 33 to circulate in the supply area. When it reaches the end of the stroke, the docking device ferryes the mold carrier 33 to the pad printing area; multiple pad printing stations 40 are equidistantly spaced in the pad printing area, and a light curing mechanism 50 is correspondingly installed on the side of each pad printing station 40, and a visual guidance component (401) is correspondingly set above each pad printing station 40; after the pad printing is completed, the docking device on the side of the last light curing machine 50 ferrys the mold carrier 33 back to the supply area, and the pattern pad printing and color difference full inspection are carried out by the full inspection component 70, and finally the mold carrier 33 is transported by the transfer and transport mechanism 60 to the receiving component 90 to complete the printing operation.

[0086] The light curing mechanism 50 is a UV curing device, which is used to cure the printed pattern of the front pad printing station 40 to improve the printing quality of the pattern;

[0087] In actual use, the rotary unit 30 is used for the circulation and driving of the mold, and is responsible for circulating the mold to be printed with patterns to various processing stations to complete the transfer of the mold; the rotary unit 30 divides the working area into two sides, one side is the supply area, in which the feeding mechanism 10 is used to provide materials, the full inspection component 70 is used to detect the pattern printing quality and color difference, and the receiving component 90 is used to receive the printed mold; the other side is the printing area, which is used to perform multiple pattern printing operations as needed, and each printing is completed by a group of pad printing stations 40 and light curing mechanisms 50;

[0088] The rotary device 31 can drive the rotary rotor 32 to move a predetermined distance, thereby driving the mold carrier 33 to move in a controllable manner; the transfer and transport mechanism 60 is mounted above the rotary device 31 and is correspondingly arranged on the side of the feeding mechanism 10 and the receiving assembly 90, and is used to assist in transporting the mold, ensuring the transfer and transport of the mold between the mold carrier 33 and the feeding mechanism 10 and the receiving assembly 90 in the supply area;

[0089] During the specific pad printing operation, the loading mechanism 10 supplies the mold to be printed. After the mold reaches the predetermined position, the transfer and handling mechanism 60 on the side of the loading mechanism 10 transfers the mold to the mold carrier 33. The rotary device 31 drives the mold carrier 33 to run to the end of the supply area. The docking device drives the mold carrier 33 to switch the corresponding rotary device 31, and then the mold carrier 33 switches between the supply area and the pad printing area. The mold carrier 33 performs multiple pattern printing in the pad printing area, and each printing is performed by the corresponding visual guidance component 401 corresponding to the auxiliary pad printing station 40 for image and text printing. A single printing After printing is completed, the light curing mechanism 50 solidifies the pattern to ensure the quality of printing; after the last printing and curing are completed, the docking device drives the mold carrier 33 to be transferred to the supply area again; the rotary device 31 drives the mold carrier 33 to the full inspection component 70 for pattern quality and color difference inspection, and then the transfer and transportation mechanism 60 on the side of the receiving component 90 transports the mold from the mold carrier 33 to the receiving component 90, completing a complete pattern printing operation; the rotary device 31 is equipped with and drives a plurality of rotary rotors 32, thereby realizing the continuous operation of multiple groups of mold carriers 33;

[0090] The rotary contact lens color mold pad printing equipment realizes the rapid switching of the working stations of the mold materials through the rotary flow conveying mode; the supply area and the pad printing area are divided to centrally arrange the work area, and the fast switching and ferrying of the partitions are realized through the docking device, thereby improving the overall work efficiency; this layout not only improves the shortcomings of the traditional linear layout, such as long thread length and large space occupation, but also avoids the waste of space in the center area of ​​the turntable under the rotary layout, and the defect of requiring multiple transfer equipment to realize the mold circulation; in the pattern printing operation, the visual guidance component 401 and the full inspection component are used to improve the quality of the printed pattern, timely detect color and color difference defects, and improve the overall quality and processing efficiency of the mold pad printing work.

[0091] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope defined by the spirit of the present invention.

Claims

1. A rotary contact lens color mold pad printing method, characterized in that: The invention comprises a rotating unit (30), wherein one side of the rotating unit (30) is a supply area (301), and the other side is a pad printing area (302); the pad printing area (302) is provided with at least one group of pad printing stations (40) and photocuring stations (50); The rotary unit (30) comprises at least two rotary devices (31) arranged in parallel, a rotary rotor (32) and a docking device; A mold carrier (33) is installed on the rotating rotor (32); a plurality of transfer and transport mechanisms (60) are installed above the rotating device (31); The steps for contact lens mold pad printing are as follows: S10. The feeding mechanism (10) discharges the mold; the transfer mechanism (60) transfers the mold to the mold carrier (33) in the supply area; S20. The rotary device (31) located in the supply area (301) drives the rotary rotor (32) to drive the mold carrier (33) to move to the pre-treatment position for pre-dust removal and surface treatment; S30. After dust removal and surface treatment, the mold carrier (33) is transferred to another rotary device (31) located in the pad printing area by the docking device; S40. A visual guidance component (401) is used to assist in positioning the movement of the pad printing station (40), and the pattern printing and curing operation is completed by at least one ink printing of the pad printing station (40) and the ink light curing of the light curing station (50). After the mold pad printing is completed, a color mold is obtained; S50. After the last curing is completed, the mold carrier (33) is ferryed to the supply area (301) again by the docking device; S60. The rotating device (31) moves the mold carrier (33) to the bottom of the full inspection component (70) to perform defect detection of the color mold; S70. The transfer mechanism (60) transfers the inspected mold to the unloading mechanism.

2. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: The loading mechanism (10) comprises a barrel assembly (11) for placing the mold, a material handling assembly (13) for picking up and placing the mold, and a height adaption assembly (12) for adjusting the height of the mold receiving and feeding material; the barrel assembly (11) comprises a rotating barrel (112), a barrel drive (111) for driving the rotating barrel (112) to rotate, a push rod (114) for pushing the mold inside the rotating barrel (112), and a push rod module (113) for driving the push rod (114) to rise and fall; During the loading action, the push rod module (113) drives the push rod (114) to extend into the rotating barrel (112), pushing the mold to the transport position of the material handling component (13), and the material handling component (13) adsorbs the mold and places it on the height adaptation component (12), and the height adaptation component (12) suspends the mold at a specified height.

3. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: In the supply area (301), according to the mold flow direction, a dust removal component (21) and a surface treatment mechanism (22) for removing dust from the mold to be printed are also provided at the rear end of the feeding mechanism (10), and S20 also includes: S21. The mold enters the dust removal assembly (21) station for dust removal while the mold carrier (33) is in operation; S22. After dust removal is completed, the mold carrier (33) moves the mold to the surface treatment mechanism (22) station for corona treatment.

4. A rotary contact lens color mold pad printing method according to claim 3, characterized in that: The surface treatment mechanism (22) comprises a corona positive electrode head (225), a corona drive (223) for driving the corona positive electrode head (225) to rise and fall, a corona negative electrode group (227) installed below the corona positive electrode head (225), a corona support plate (222) for carrying a mold, and a support plate drive (221) for driving the corona support plate (222); One end of the corona support plate (222) is supported by an auxiliary rail, and the support plate drive (221) is connected to and drives the other end of the corona support plate (222); the corona support plate (222) moves back and forth between the transfer and transport mechanism (60) and the bottom of the corona positive electrode head (225).

5. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: The docking device comprises a docking module (35) and a rotary drive (34) for driving the docking module (35) to move; In S30 and S60, the rotary drive (34) drives the docking module (35) to alternately ferry between the two rotary devices (31).

6. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: The pad printing station (40) comprises two pad printing rubber head assemblies (42), a pad printing head fine-motion adjustment mechanism (43) for fine-tuning the pad printing rubber head assemblies (42), a pad printing robot (41) for driving the pad printing head fine-motion adjustment mechanism (43) to move, an ink scraping mechanism (45) for providing ink to the pad printing rubber head assemblies (42), and a cleaning mechanism (44); an air blowing structure is also provided on the pad printing rubber head (42); During the pad printing operation, the visual guidance component (401) guides and positions the pad printing robot (41), and the pad printing robot (41) drives the pad head fine-motion adjustment mechanism (43) and the pad printing rubber head component (42) installed at the end of the pad head fine-motion adjustment mechanism (43), and the pad printing rubber head fine-motion adjustment mechanism (43) further fine-tunes the horizontal and height of the pad printing action of the pad printing rubber head component (42); the ink scraping mechanism (45) provides ink for the pad printing action of the pad printing rubber head component (42), and the air blowing structure blows air to the pad printing rubber head component (42) and the ink scraping mechanism (45) to control the viscosity of the ink; after a single pad printing is completed, the cleaning mechanism (44) cleans the pad printing rubber head component (42), and the printed mold enters the bottom of the light curing mechanism (50).

7. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: In the supply area (301), a laser marking component (80) is also provided between the full inspection component (70) and the unloading mechanism (90) for marking the mold after inspection and identification; S60 also includes: S61. After the color difference detection of the full inspection component (70) is completed, the mold enters the laser marking component (80) station under the operation of the mold carrier (33) to mark defective products.

8. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: The full inspection assembly (70) comprises a full inspection base (76) mounted on the side of the rotary unit (30) and a full inspection camera (71) mounted on the full inspection base (76) by means of a full inspection bracket (711); the full inspection base (76) is further provided with a full inspection drive (73); an execution end of the full inspection drive (73) is connected to a fill light cover (72); and a camera shield (75) is provided on the full inspection bracket (711).

9. A rotary contact lens color mold pad printing method according to claim 1, characterized in that: The transfer transport mechanism (60) comprises a transfer transport drive (61) mounted on the top of the rotating device (31) by using a transfer bracket (66); a transfer mounting plate (63) is provided at the execution end of the transfer transport drive (61); a transfer suction cup group (65) is movably mounted on the transfer mounting plate (63) by using a suction cup guide rod (641); a transfer downward driving (62) for driving the transfer suction cup group (65) is installed on the transfer mounting plate (63); During transfer transportation, the transfer transportation drive (61) drives the transfer installation plate (63) to travel back and forth in the working area; after the transfer installation plate (63) reaches the transportation position, the transfer downward driving (62) drives the transfer suction cup (65) to move downward and upward to complete the grabbing and placing actions of the mold, thereby realizing the flow of the color film between the rotary unit (30) and the supply area.

10. A rotary contact lens color mold pad printing system, used for implementing the rotary contact lens color mold pad printing method according to claims 1-9, characterized in that: The invention comprises a rotary unit (30) for circulating the mold, wherein one side of the rotary unit (30) is a supply area (301) for auxiliary mold materials, and the other side is a pad printing area (302) for printing mold patterns; the supply area (301) is provided with a feeding mechanism (10), a material receiving component (90), a dust removal component (21), a surface treatment mechanism (22) and a laser marking component (80); the pad printing area is provided with a pad printing station (40) and a light curing component (50); the feeding mechanism (10), the material receiving component (90) and the surface treatment mechanism (22) all use a transfer and handling mechanism (60) and the rotary unit (30) to realize the interaction of the mold.

Images