Contact lens filling and mold closing equipment

Abstract

The utility model relates to the technical field of contact lens automatic production, in particular to contact lens filling and mold closing equipment which comprises a turnover unit used for turnover of jig assemblies, and the turnover unit is divided into a feeding area, at least one filling and liquid injection area and a discharging area according to functional areas; a mold opening and closing unit and a liquid injection unit are arranged on the side part of the filling and liquid injection area; a feeding unit for providing a to-be-filled mold is arranged on the side portion of the feeding area, a discharging unit for collecting the filled mold is arranged on the side portion of the discharging area, and a visual inspection unit is further arranged above the discharging area. According to the utility model, mold opening, filling and mold closing actions are integrated, the whole structure is compact, the function integration degree is high, multiple filling liquid injection areas are synchronously injected and filled in batches, the whole operation period of the mold is shortened, and the liquid injection and filling efficiency is improved; the automatic feeding and discharging unit is matched, the risk of manual operation is reduced, and the overall production and processing quality of the contact lenses is improved.

Description

Technical Field

[0001] This utility model relates to the field of automated production technology of contact lenses, specifically a contact lens filling and molding device. Background Technology

[0002] Contact lenses are becoming increasingly popular due to their role in vision correction and aesthetic enhancement.

[0003] Currently, compression molding is a relatively new contact lens manufacturing process. Existing compression molding methods for contact lens production often use liquid materials such as high-molecular polymers. Liquid injection is a crucial step in the process, and while it has achieved some automation, conventional automated equipment still involves separate injection and suction of the raw materials. This complex injection process is prone to malfunctions, resulting in poor injection precision. Furthermore, misalignment and unevenness during the upper and lower mold closing process can lead to variations in lens thickness, affecting the quality of the finished contact lenses. Asynchronous and unstable pressing processes, with incomplete removal of air bubbles within the mold, can also result in a high bubble rate in the lenses, further impacting the overall lens yield. Utility Model Content

[0004] The purpose of this invention is to provide an automatic mold opening and closing device with multiple cavity synchronization, high functional integration, and stable operation for contact lens filling and mold closing.

[0005] To achieve the above objectives, this utility model provides the following technical solution;

[0006] A contact lens filling and molding device includes a turnover unit for a turnover fixture assembly. The turnover unit is divided into a feeding area, at least one filling and injection area, and a discharging area according to functional regions. The filling and injection area is provided with a mold opening and closing unit and an injection unit on its side. The feeding area is provided with a feeding unit for providing the mold to be filled on its side. The discharging area is provided with a discharging unit for collecting the filled mold on its side. A visual inspection unit is also provided above the discharging area.

[0007] During the filling and mold closing operation, the feeding unit places the mold to be filled on the fixture assembly in the feeding area; the turnover unit drives multiple fixture assemblies to enter the filling and injection area simultaneously, the mold opening and closing unit opens the mold, the injection unit injects the raw material to fill it, and then the mold is closed by the mold opening and closing unit; the turnover unit drives the fixture assembly carrying the filled mold to the unloading area, the visual inspection unit inspects the fixture assembly, and the unloading unit collects the material.

[0008] Furthermore, the feeding unit includes a tray transport trolley, a set of parallel tray moving modules, and a tray temporary storage platform; each tray moving module is equipped with a tray handling gripper and a tray handling module for driving the tray handling gripper to move at its front end; and a material handling robot is equipped with a material handling robot at the end of the two tray moving modules.

[0009] The pallet-moving module drives the pallet-moving gripper to move and transport the pallet containing the mold on the pallet-carrying trolley to the pallet-moving module. The pallet-moving module then moves the pallet containing the mold to the side of the loading area. The material handling robot then transports the mold on the pallet to the fixture assembly located in the loading area. Finally, the material handling robot transports the half-empty pallet to the pallet storage platform for buffering.

[0010] Furthermore, the mold opening and closing unit includes an upper mold positioning mechanism that defines the position of the lower mold, a lower mold positioning mechanism that defines the position of the lower mold, and a mold opening mechanism for opening the mold; the liquid injection unit includes a liquid injection needle assembly, a needle assembly module that drives the liquid injection needle assembly to the liquid injection position, a liquid injector assembly for extracting and injecting raw materials, a liquid injection valve assembly for switching the extraction and injection action, and a constant temperature chamber for storing raw materials.

[0011] Within the filling and injection area, the turnover unit transports the fixture assembly to the predetermined position. After the lower mold positioning mechanism positions the lower mold, the mold opening mechanism separates the upper mold and the lower mold, and the upper mold positioning mechanism moves the upper mold away from the lower mold.

[0012] During the injection process, the injection unit fills the mold in the fixture assembly with the raw material;

[0013] When the mold is closed, the upper mold positioning mechanism moves the upper mold back to the lower mold and places the upper mold in the lower mold. The upper mold positioning mechanism applies pressure to the upper mold, so that the upper mold and the lower mold are pressed together.

[0014] Furthermore, the upper mold positioning mechanism includes a suction nozzle assembly and an upper mold module that pushes the suction nozzle assembly to rise and fall; the upper mold module includes an upper mold lifting drive fixed on the upper mold support, an upper mold sliding frame installed at the execution end of the upper mold lifting drive, the upper mold sliding frame being slidably installed on the upper mold support, and a suction nozzle mounting bracket for installing the suction nozzle assembly being provided at the bottom of the upper mold sliding frame;

[0015] Furthermore, the nozzle assembly includes several nozzle slide rods slidably mounted on the nozzle mounting bracket, with an upper mold nozzle mounted at the end of each nozzle slide rod and a mold closing counterweight mounted on the rod body of each nozzle slide rod;

[0016] Furthermore, the lower mold positioning mechanism includes a lower mold positioning nozzle disposed below the fixture assembly and a lower mold positioning drive for pushing the lower mold positioning nozzle up and down; the mold opening mechanism includes at least one mold opening drive, a fork connecting plate mounted on the execution end of the mold opening drive, and a mold opening fork mounted on the fork connecting plate for inserting and separating the upper and lower molds of the contact lens.

[0017] Furthermore, the injection unit includes an injection needle assembly, a needle assembly module for driving the injection needle assembly to the injection position, an injector assembly for extracting and injecting raw materials, an injection valve assembly, and a constant temperature chamber for storing raw materials; the injector assembly and the constant temperature chamber are both mounted on the main injection frame; the injection needle assembly is connected to the injection valve assembly via an injection hose; the injection needle assembly is mounted on the execution end of the needle assembly module, and the needle assembly module is mounted on the side of the main injection frame via an injection side frame;

[0018] During the injection process, the injector assembly extracts the raw material from the constant temperature chamber, the injection valve group switches to the injection state, the needle module drives the injection needle group to the injection position, and the injector assembly pushes the raw material into the injection needle group to fill the mold in the fixture assembly.

[0019] Furthermore, the visual inspection unit includes a detection camera, a visual inspection drive that drives the detection camera to move laterally, a supplementary light board, a light board drive that drives the supplementary light board to move horizontally, and a top mold assembly for multiple lifting molds; the visual inspection drive is located above the unloading area of ​​the turnover unit and drives the detection camera to scan across the fixture assembly; the light board drive is located below the unloading area and drives the supplementary light board to move below the fixture assembly.

[0020] The top mold assembly includes a top mold head installed below the material unloading area of ​​the turnover unit, and a top mold cylinder for driving the top mold head to rise and fall.

[0021] Furthermore, the fixture assembly includes a fixture plate mounted on a turnover unit; the fixture plate is provided with a first row of mold slots and a second row of mold slots arranged side by side; mold opening mechanisms are respectively provided on the side of the first row of mold slots and the side of the second row of mold slots; the lower mold positioning mechanism is located below the fixture plate, and the upper mold positioning mechanism is located above the fixture plate;

[0022] The turnover unit includes a turnover ring rail, several turnover disks slidably disposed on the turnover ring rail, and a turnover drive mechanism for driving the turnover disks to rotate around the turnover ring rail. The fixture plate is disposed on the turnover disk. The turnover drive mechanism is connected by chain drive or belt drive and drives the turnover disks to slide on the turnover ring rail. There are two filling and injection areas, which are located on the side of the turnover ring rail and between the loading area and the unloading area.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] In practical use, the turnover unit is a rectangular loop-type circulating track. The fixture assembly is used to carry the contact lens mold. The turnover unit is divided into a feeding area, at least one filling and injection area, and a discharging area according to functional areas. The feeding area and the discharging area are adjacent, and the two filling and injection areas are adjacent. The rectangular layout and equipment space are used in a reasonable way to reduce the size of the equipment. Each filling and injection area is equipped with two sets of mold opening and closing units and injection units. During the filling and mold closing operation, the turnover unit drives multiple fixture assemblies to enter the filling and injection area at the same time. The two filling and injection areas each work on half of the fixture assemblies. The rectangular distribution structure is fully utilized to disperse the workstations and reasonably reserve installation space for the mold opening and closing units and injection units. The turnover unit quickly and synchronously turns over, reducing the overall running time of the mold and the filling operation time. After the raw material is filled and injected, the mold is lifted off the fixture assembly by the visual inspection unit after visual inspection, and waits for the unloading unit to collect and pack the material onto the tray. This completes the automated operation of the contact lens mold from mold opening, liquid filling to mold closing.

[0025] This contact lens filling and mold closing device integrates mold opening, filling, and mold closing actions. It has a compact overall structure and a high degree of functional integration. Multiple filling and injection areas can simultaneously inject and fill liquid in batches, reducing the overall mold operation cycle and improving the liquid injection and filling efficiency. With the help of an automatic loading and unloading unit, it reduces the risk of manual operation and improves the overall production and processing quality of contact lenses. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of this utility model with some parts concealed;

[0028] Figure 3 This is a top view of the feeding unit of this utility model;

[0029] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the opening and closing mold unit structure of this utility model;

[0031] Figure 6 This is a partially enlarged schematic diagram of the mold opening and closing unit D of this utility model;

[0032] Figure 7 This is a side view of the opening and closing mold unit structure of this utility model;

[0033] Figure 8 This is a partially enlarged schematic diagram of the mold opening and closing unit B of this utility model;

[0034] Figure 9This is a partially enlarged schematic diagram of the mold opening and closing unit C of this utility model;

[0035] Figure 10 This is a schematic diagram of the liquid injection unit structure of this utility model;

[0036] Figure 11 This is a partially enlarged schematic diagram of the injection unit A of this utility model;

[0037] Figure 12 This is a schematic diagram of the structure of the visual inspection unit of this utility model;

[0038] Figure 13 This is a schematic diagram of the structure of the turnover unit and fixture assembly of this utility model. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] refer to Figure 1-13 As shown, a contact lens filling and molding device includes a turnover unit 200 for a turnover fixture assembly 300. The turnover unit 200 is divided into a feeding area, at least one filling and injection area, and a discharging area according to its functional regions. The filling and injection area is provided with a mold opening and closing unit 500 and an injection unit 400 on its side. The feeding area is provided with a feeding unit 100 for providing the mold to be filled on its side. The discharging area is provided with a discharging unit 700 for collecting the mold after filling on its side. A visual inspection unit 600 is also provided above the discharging area.

[0041] During the filling and mold closing operation, the feeding unit 100 places the mold to be filled on the jig assembly 300 in the feeding area; the turnover unit 200 drives multiple jig assemblies 300 to enter the filling and injection area simultaneously, the mold opening and closing unit 500 opens the mold, the injection unit 400 injects the raw material to fill it, and then the mold is closed by the mold opening and closing unit 500; the turnover unit 200 drives the jig assembly 300 carrying the filled mold to the unloading area, the visual inspection unit 600 inspects the jig assembly 300, and the unloading unit 700 collects the material.

[0042] In practical use, the turnover unit 200 is a rectangular loop-type circulating track, and the fixture assembly 300 is used to support the contact lens mold. The turnover unit 200 is divided into a feeding area, at least one filling and injection area, and a discharging area according to functional regions. The feeding area and the discharging area are adjacent, and the two filling and injection areas are adjacent, making reasonable use of the rectangular layout and equipment space to reduce the equipment volume. Each filling and injection area is equipped with two sets of mold opening and closing units 500 and injection units 400. During the filling and mold closing operation, the turnover unit 200 drives multiple fixture assemblies 300 to enter the filling and injection area simultaneously. The filling and injection area operates on half of the fixture components 300. The rectangular distribution structure is fully utilized to disperse the workstations and reasonably reserve installation space for the mold opening and closing unit 500 and the injection unit 400. The turnover unit 200 enables rapid synchronous turnover, reducing the overall running time of the mold and the filling operation time. After the raw material is filled, the mold is lifted off the fixture component 300 by the visual inspection unit 600 and waits for the unloading unit 700 to collect and pack the material, thus completing the automated operation of the contact lens mold from mold opening, liquid filling to mold closing.

[0043] This contact lens filling and molding equipment integrates mold opening, filling, and mold closing actions. It has a compact overall structure and a high degree of functional integration. Multiple filling and injection areas can simultaneously inject and fill liquid in batches, reducing the overall mold operation cycle and improving the liquid injection and filling efficiency. With the help of an automatic loading and unloading unit, it reduces the risk of manual operation and improves the overall production and processing quality of contact lenses.

[0044] In this embodiment, the feeding unit 100 includes a tray transport trolley 110, a set of parallel tray moving modules 140, and a tray temporary storage platform 150; each tray moving module 140 is provided with a tray handling gripper 130 and a tray handling module 120 for driving the tray handling gripper 130 to move at its front end; and a material handling robot 160 is provided at the ends of the two tray moving modules 140.

[0045] The pallet-moving module 120 drives the pallet-moving gripper 130 to move and transport the pallet containing the mold on the pallet-moving trolley 110 to the pallet-moving module 140. The pallet-moving module 140 moves the pallet containing the mold to the side of the loading area. The material handling robot 160 transports the mold on the pallet to the fixture assembly 300 located in the loading area. The material handling robot 160 transports the empty pallet after it is partially empty to the pallet temporary storage platform 150 for buffering.

[0046] The tray transport trolley 110 is an AGV trolley that can transport trays to designated locations. The tray transfer module 120 is a linear motor module. The tray transfer module 120 drives the tray transfer gripper 130 to pick up the tray containing the mold to be filled from the AGV trolley and transfer it to the tray moving module 140. The tray moving module 140 transports the tray to the side of the loading area, and the material handling robot 160 moves the mold on the tray to the fixture assembly 300. After being emptied, the tray is transferred by the tray moving module 140 to the tray temporary storage platform 150. The loading unit 100 has one handling robot 160 that is responsible for two tray moving modules 140, further improving the overall production efficiency of the equipment.

[0047] In this embodiment, the mold opening and closing unit 500 includes an upper mold positioning mechanism that defines the position of the lower mold, a lower mold positioning mechanism 560 that defines the position of the lower mold, and a mold opening mechanism 550 for opening the mold; the liquid injection unit includes a liquid injection needle assembly 410, a needle assembly module 420 that drives the liquid injection needle assembly 410 to the liquid injection position, a liquid injector assembly 460 for extracting and injecting raw materials, a liquid injection valve assembly 450 for switching the extraction and injection action, and a constant temperature chamber 430 for storing raw materials; in the filling and liquid injection area, the turnover unit (200) transports the fixture assembly (300) to a predetermined position, after the lower mold positioning mechanism (560) positions the lower mold, the mold opening mechanism (550) separates the upper mold and the lower mold, and the upper mold positioning mechanism moves the upper mold away from the lower mold;

[0048] During the injection operation, the injection unit (400) fills the mold in the jig assembly (300) with the raw material;

[0049] When the mold is closed, the upper mold positioning mechanism moves the upper mold back to the lower mold and places the upper mold in the lower mold. The upper mold positioning mechanism applies pressure to the upper mold, so that the upper mold and the lower mold are pressed together.

[0050] The overall liquid injection filling process consists of three actions: mold opening, filling, and mold closing. During the mold opening action, the lower mold positioning mechanism 560 positions the lower mold, and then the mold opening mechanism 550 separates the upper and lower molds of the contact lens. The upper mold module 520 drives the suction nozzle assembly 540 to descend and then rises after adsorbing the upper mold, opening the mold and waiting for liquid injection filling. After the liquid injection is completed, the upper mold module 520 drives the suction nozzle assembly 540 to descend and uses its own designed counterweight to close and seal the mold, completing the mold closing action. During the entire mold opening and filling action, the turnover unit 200 stops moving, and the fixture assembly 300 is stationary. After the mold closing is completed, the turnover unit 200 drives another fixture assembly 300 to start the next filling and mold closing work cycle.

[0051] In this embodiment, the upper mold positioning mechanism includes a suction nozzle assembly 540 and an upper mold module 520 that pushes the suction nozzle assembly 540 up and down. The upper mold module 520 includes an upper mold lifting drive 521 fixed on the upper mold support 510. The upper mold lifting drive 521 has an upper mold sliding frame 522 installed at its execution end. The upper mold sliding frame 522 is slidably installed on the upper mold support 510, and a suction nozzle mounting frame 530 for mounting the suction nozzle assembly 540 is provided at the bottom of the upper mold sliding frame 522.

[0052] Multiple upper mold modules 520 can be set on the upper mold support 510 as needed. The upper mold lifting drive 521 is an electric cylinder module. The upper mold lifting drive 521 can push the upper mold sliding frame 522 to move up and down, thereby driving the suction nozzle assembly 540 to achieve the lifting and lowering movement of the upper mold after suction.

[0053] In this embodiment, the suction nozzle assembly 540 includes several suction nozzle slide rods 542 slidably mounted on the suction nozzle mounting bracket 530. Each suction nozzle slide rod 542 has an upper mold suction nozzle 541 mounted at its end, and a mold closing counterweight 543 mounted on the rod body of each suction nozzle slide rod 542. The suction nozzle mounting bracket 530 has several suction nozzle slide rods 542 slidably mounted. This sliding mounting method avoids the downward movement during mold closing being directly transmitted to the mold, reducing the risk of mold damage. The bottom of each suction nozzle slide rod 542 is connected to the upper mold suction nozzle 541, and the mold closing counterweight 543 corresponding to each upper mold suction nozzle 541 has the same weight. Using a reasonable weight counterweight effectively achieves the mold closing action while avoiding damage to the mold. For different mold closing requirements, only the mold closing counterweight 543 on the suction nozzle slide rod 542 needs to be replaced.

[0054] In this embodiment, the mold opening mechanism 550 includes at least one mold opening drive 551, a fork connecting plate 552 mounted on the execution end of the mold opening drive 551, and a mold opening fork 553 mounted on the fork connecting plate 552 for inserting the upper and lower molds of the contact lens. The mold opening module is located on the side of the liquid filling station. The mold opening drive 551 is a cylinder, and each mold opening drive 551 corresponds to a mold on a fixture assembly 300. The mold opening drive 551 pushes the fork connecting plate 552 forward and inserts the mold opening fork 553 into the mold on the fixture assembly 300. Since the mold has been positioned by the lower mold positioning mechanism 560, only the upper mold is inserted by the mold opening fork 553 and suspended on the mold opening fork 553, waiting for the suction nozzle assembly 540 to adsorb it.

[0055] The lower mold positioning mechanism 560 includes a lower mold positioning suction nozzle 562 disposed below the fixture assembly 300 and a lower mold positioning drive 561 for pushing the lower mold positioning suction nozzle 562 up and down. When the fixture assembly 300 enters the workstation, the lower mold positioning drive 561 is used to push the lower mold positioning suction nozzle 562 up for suction and positioning. The lower mold positioning suction nozzle 562 is used to suction and fix the lower mold in the fixture assembly 300 to ensure the stability of the lower mold during the mold opening, filling and closing processes. After the mold is closed, the lower mold positioning drive 561 is used to push the lower mold positioning suction nozzle 562 down to wait for the next fixture assembly 300 to enter the workstation and start the next work cycle.

[0056] The injection unit (400) includes an injection needle assembly (410), a needle module (420) for driving the injection needle assembly (410) to the injection position, an injector assembly (460) for extracting and injecting raw materials, an injection valve assembly (450), and a constant temperature chamber (430) for storing raw materials; the injector assembly (460) and the constant temperature chamber (430) are both mounted on the main injection frame (470); the injection needle assembly (410) is connected to the injection valve assembly (450) via an injection hose (411); the injection needle... The assembly (410) is installed on the execution end of the needle assembly module (420). The needle assembly module (420) is installed on the side of the injection main frame (470) using an injection side frame (412). During the injection operation, after the injector assembly (460) extracts the raw material from the constant temperature chamber (430), the injection valve assembly (450) switches to the injection state. The needle assembly module (420) drives the injection needle assembly (410) to the injection position. The injector assembly (460) pushes the raw material into the injection needle assembly (410) to fill the mold in the fixture assembly (300).

[0057] The injection valve assembly 450 is a reversible three-way valve assembly. It connects the injection needle assembly 410 and the constant temperature chamber 430. The needle assembly module 420 is mounted on the side of the injection main frame 470, resulting in a compact overall layout that avoids unnecessary movement. During injection filling, the injector assembly 460 performs the extraction and filling actions. During extraction, the injection valve assembly 450 is in extraction mode, and the injector assembly 460 extracts the raw material from the constant temperature chamber 430 for temporary storage. The constant temperature chamber 430 is a small constant temperature refrigerator. During injection, the injection valve assembly 450 switches to injection mode, and the needle assembly module 420 drives the injection needle assembly 410 to move above the fixture assembly 300. The injector assembly 460 then pushes the raw material into the injection needle assembly 410 to complete the filling action.

[0058] In this embodiment, the needle assembly module 420 includes a needle assembly forward movement drive 421 mounted on the injection side frame 412, a displacement adjustment platform 422 mounted on the execution end of the needle assembly forward movement drive 421, and a needle assembly downward pressure drive 423 mounted on the execution end of the displacement adjustment platform 422. The needle assembly forward movement drive 421 is a linear module, and the needle assembly downward pressure drive 423 is a cylinder. The needle assembly forward movement drive 421 is used to drive the needle assembly downward pressure drive 423 to move above the fixture assembly 300, and the needle assembly downward pressure drive 423 drives the needle assembly module 420 to probe downward for injection. A manually adjustable displacement adjustment platform 422 is also provided between the needle assembly forward movement drive 421 and the needle assembly downward pressure drive 423 to achieve precise position adjustment of the execution end and avoid quality problems caused by errors.

[0059] In this embodiment, the needle assembly pressing drive 423 is equipped with a needle assembly mounting plate 424 at its execution end; a plurality of injection needles are mounted on the needle assembly mounting plate 424 to form an injection needle assembly 410; when the number of injection needles needs to be adjusted, only the corresponding needle assembly mounting plate 424 needs to be replaced, so as to achieve rapid equipment adjustment and debugging to adapt to more types of contact lens related fixtures.

[0060] In this embodiment, a leakage collection hopper 480 is also installed below the injection needle assembly 410; after the injection is completed, the injection needle assembly 410 returns to the initial stationary position under the drive of the needle assembly module 420, and the leakage collection hopper 480 can prevent residual raw material from dripping from the needle tip.

[0061] In this embodiment, the visual inspection unit 600 includes a detection camera 620, a visual inspection drive 610 for driving the detection camera 620 to move laterally, a supplementary light plate 630, a light plate drive 650 for driving the supplementary light plate 630 to move horizontally, and a top mold assembly for multiple lifting molds; the visual inspection drive 610 is located above the unloading area of ​​the turnover unit 200 and drives the detection camera 620 to scan across the fixture assembly 300; the light plate drive 650 is located below the unloading area and drives the supplementary light plate 630 to move below the fixture assembly 300; the top mold assembly includes a top mold head 660 installed below the unloading area of ​​the turnover unit 200 and a top mold cylinder 670 for driving the top mold head 660 to rise and fall.

[0062] The visual inspection drive 610 is a linear module, and its execution end is connected to a set of inspection cameras 620 through a frame plate. The visual inspection drive 610 drives the inspection cameras 620 to move, covering all the fixture components 300 in the unloading area to achieve visual inspection. The light board drive 620 is a cylinder. During visual inspection, the light board drive 620 moves the supplementary light board 630 to below the fixture component 300, allowing light to pass through the mold for supplementary lighting, which is convenient for the inspection camera 620 to take visual inspection pictures. After the visual inspection is completed, the light board drive 620 pushes the supplementary light board 630 away, and the top mold cylinder 670 pushes the top mold rubber head 660 to push the mold in the fixture component 300 up, waiting for the operation of the unloading unit 700.

[0063] In this embodiment, the structural features of the unloading unit 700 are the same as those of the loading unit 100, but the working process is reversed. Therefore, during the unloading process, the pallet trolley 110 is used to transport empty pallets, and the pallet transfer module 120 drives the pallet transfer gripper 130 to grab the empty pallet from the AGV trolley onto the pallet moving module 140. The pallet moving module 140 transports the empty pallet to the side of the unloading area, waiting for the visual inspection unit 600 to complete its work. When the mold is lifted, the mold that has been filled on the jig assembly 300 is transported to the empty pallet by the material handling robot 160. After the pallet is full, the pallet of the filled mold is transferred from the pallet moving module 140 to the pallet temporary storage platform 150, and the material is collected after filling.

[0064] In this embodiment, the jig assembly 300 includes a jig plate 310 mounted on the turnover unit 200; the jig plate 310 is provided with a first row of mold slots 320 and a second row of mold slots 330 arranged side by side; the sides of the first row of mold slots 320 and the sides of the second row of mold slots 330 are respectively provided with mold opening mechanisms 550; the lower mold positioning mechanism 560 is located below the jig plate 310, and the upper mold positioning mechanism is located above the jig plate 310;

[0065] Preferably, at each injection filling station, the jig assembly 300 with double mold slots is equipped with two mold opening mechanisms 550 on both sides for opening the upper and lower molds; and is equipped with an upper mold positioning mechanism and a lower mold positioning mechanism 560 for positioning and suction of the upper and lower molds; the double slot design holds the molds, and together with the double mold opening mechanism 550, the overall structure is more compact and the efficiency of one-time injection filling is improved.

[0066] The turnover unit 200 includes a turnover ring rail 210, a plurality of turnover disks 220 slidably disposed on the turnover ring rail 210, and a turnover drive mechanism 230 for driving the turnover disks 220 to rotate around the turnover ring rail 210. The fixture plate 310 is disposed on the turnover disks 220. The turnover drive mechanism 230 is connected by chain drive or belt drive and drives the turnover disks 220 to slide on the turnover ring rail 210. There are two filling and injection areas, which are located on the side of the turnover ring rail 210 and are located between the loading area and the unloading area.

[0067] The rotating drive mechanism 230 is a motor, and the rotating ring rail 210 is a rounded rectangular ring rail with four sides. The output end of the rotating drive mechanism 230 drives a gear disk, which in turn drives a gear chain. Several rotating disks 220 are connected to the gear chain. With one rotation of the rotating drive mechanism 230, the rotating disks 220 on a single side can be rotated synchronously and in one go. On the four sides, there are two adjacent filling and injection areas between the loading area and the unloading area. In a single filling and injection area, the molds in some jig components 300 are filled with liquid. For example, if there are four jig components on a single side, the first and third jig components 300 are filled and injected in the first filling and injection area, and the second and fourth jig components 300 are filled and injected in the second filling and injection area. The overall structure is compact and reasonable, enabling synchronous turnover and batch operation, thus improving the overall processing efficiency.

[0068] A contact lens filling and molding system, and a contact lens filling and molding method, comprising a turnover unit 200 for a turnover fixture assembly 300, and a mold opening and closing unit 500, an injection unit 400, a feeding unit 100 for providing the mold to be filled, a discharging unit 700 for collecting the filled mold, and a visual inspection unit 600 distributed on the side of the turnover unit.

[0069] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by the spirit of this utility model.

Claims

1. A contact lens filling and molding device, characterized in that, The system includes a turnover unit (200) for a turnover fixture assembly (300), the turnover unit (200) being divided into a loading area, at least one filling and injection area, and a unloading area according to functional regions; the filling and injection area is provided with a mold opening and closing unit (500) and an injection unit (400) on its side; the loading area is provided with a loading unit (100) for providing molds to be filled on its side, the unloading area is provided with an unloading unit (700) for collecting molds after filling on its side, and an inspection unit (600) is also provided above the unloading area. During the filling and mold closing operation, the loading unit (100) places the mold to be filled on the fixture assembly (300) in the loading area; the turnover unit (200) drives multiple fixture assemblies (300) to enter the filling and injection area at the same time, the mold opening and closing unit (500) opens the mold, the injection unit (400) injects the raw material to fill, and then the mold is closed by the mold opening and closing unit (500); the turnover unit (200) drives the fixture assembly (300) carrying the filled mold to the unloading area, the visual inspection unit (600) inspects the fixture assembly (300), and the unloading unit (700) collects the material.

2. The contact lens filling and molding device according to claim 1, characterized in that, The feeding unit (100) includes a tray transport trolley (110), a set of parallel tray moving modules (140), and a tray storage platform (150); each tray moving module (140) is provided with a tray handling gripper (130) and a tray handling module (120) for driving the tray handling gripper (130) to move; and a material handling robot (160) is provided at the ends of the two tray moving modules (140). The pallet-moving module (120) drives the pallet-moving gripper (130) to move and transport the pallet containing the mold on the pallet-moving trolley (110) to the pallet-moving module (140). The pallet-moving module (140) moves the pallet containing the mold to the side of the loading area. The material handling robot (160) transports the mold on the pallet to the fixture assembly (300) located in the loading area. The material handling robot (160) transports the empty pallet after it is half empty to the pallet temporary storage platform (150) for buffering.

3. The contact lens filling and molding device according to claim 1, characterized in that, The mold opening and closing unit (500) includes an upper mold positioning mechanism that defines the position of the lower mold, a lower mold positioning mechanism (560) that defines the position of the lower mold, and a mold opening mechanism (550) for opening the mold. In the filling and injection area, the turnover unit (200) transports the jig assembly (300) to the predetermined position. After the lower mold positioning mechanism (560) positions the lower mold, the mold opening mechanism (550) separates the upper mold and the lower mold, and the upper mold positioning mechanism moves the upper mold away from the lower mold. During the injection operation, the injection unit (400) fills the mold in the jig assembly (300) with the raw material; When the mold is closed, the upper mold positioning mechanism moves the upper mold back to the lower mold and places the upper mold in the lower mold. The upper mold positioning mechanism applies pressure to the upper mold, so that the upper mold and the lower mold are pressed together.

4. The contact lens filling and molding device according to claim 3, characterized in that, The upper mold positioning mechanism includes a suction nozzle assembly (540) and an upper mold module (520) that pushes the suction nozzle assembly (540) up and down. The upper mold module (520) includes an upper mold lifting drive (521) fixed on the upper mold support (510). The upper mold lifting drive (521) has an upper mold sliding frame (522) installed at its execution end. The upper mold sliding frame (522) is slidably installed on the upper mold support (510), and a suction nozzle mounting bracket (530) for installing the suction nozzle assembly (540) is provided at the bottom of the upper mold sliding frame (522).

5. The contact lens filling and molding device according to claim 4, characterized in that, The nozzle assembly (540) includes a plurality of nozzle slide rods (542) slidably mounted on the nozzle mounting bracket (530). Each nozzle slide rod (542) has an upper mold nozzle (541) mounted at its end, and each nozzle slide rod (542) has a mold closing counterweight (543) mounted on its body.

6. The contact lens filling and molding device according to claim 3, characterized in that, The lower mold positioning mechanism (560) includes a lower mold positioning nozzle (562) disposed below the fixture assembly (300) and a lower mold positioning drive (561) for pushing the lower mold positioning nozzle (562) up and down; the mold opening mechanism (550) includes at least one mold opening drive (551), a fork connecting plate (552) mounted on the execution end of the mold opening drive (551) and a mold opening fork (553) mounted on the fork connecting plate (552) for inserting the upper and lower molds of the contact lens.

7. The contact lens filling and molding device according to claim 3, characterized in that, The injection unit (400) includes an injection needle assembly (410), a needle module (420) for driving the injection needle assembly (410) to the injection position, an injector assembly (460) for extracting and injecting raw materials, an injection valve assembly (450), and a constant temperature chamber (430) for storing raw materials; the injector assembly (460) and the constant temperature chamber (430) are both mounted on the main injection frame (470); the injection needle assembly (410) is connected to the injection valve assembly (450) by an injection hose (411); the injection needle assembly (410) is mounted on the execution end of the needle module (420), and the needle module (420) is mounted on the side of the main injection frame (470) by an injection side frame (412); During the injection operation, after the injector assembly (460) extracts the raw material from the constant temperature chamber (430), the injection valve assembly (450) switches to the injection state, the needle assembly module (420) drives the injection needle assembly (410) to the injection position, and the injector assembly (460) pushes the raw material into the injection needle assembly (410) to fill the mold in the fixture assembly (300).

8. The contact lens filling and molding device according to claim 1, characterized in that, The visual inspection unit (600) includes a detection camera (620), a visual inspection drive (610) that drives the detection camera (620) to move laterally, a supplementary light plate (630), a light plate drive (650) that drives the supplementary light plate (630) to move horizontally, and a top mold assembly for multiple lifting molds; the visual inspection drive (610) is located above the unloading area of ​​the turnover unit (200) and drives the detection camera (620) to scan across the fixture assembly (300); the light plate drive (650) is located below the unloading area and drives the supplementary light plate (630) to move below the fixture assembly (300); The top mold assembly includes a top mold head (660) installed below the material unloading area of ​​the turnover unit (200), and a top mold cylinder (670) for driving the top mold head (660) to rise and fall.

9. A contact lens filling and molding device according to claim 3, characterized in that, The fixture assembly (300) includes a fixture plate (310) mounted on a turnover unit (200); the fixture plate (310) is provided with a first row of mold slots (320) and a second row of mold slots (330) arranged in parallel; the sides of the first row of mold slots (320) and the sides of the second row of mold slots (330) are respectively provided with mold opening mechanisms (550); the lower mold positioning mechanism (560) is located below the fixture plate (310), and the upper mold positioning mechanism is located above the fixture plate (310).

10. A contact lens filling and molding device according to claim 9, characterized in that, The turnover unit (200) includes a turnover ring rail (210), a plurality of turnover disks (220) slidably disposed on the turnover ring rail (210), and a turnover drive mechanism (230) for driving the turnover disks (220) to rotate around the turnover ring rail (210). The fixture plate (310) is disposed on the turnover disks (220). The turnover drive mechanism (230) is connected by chain drive or belt drive and drives the turnover disks (220) to slide on the turnover ring rail (210). There are two filling and injection areas. The two filling and injection areas are located on the side of the turnover ring rail (210) and are located between the loading area and the unloading area.

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