Automatic filling and mold closing equipment for contact lenses

Abstract

The invention relates to the field of contact lens manufacturing, in particular to contact lens automatic filling mold closing equipment which comprises a positioning carrier plate, a mold splitting assembly, a liquid injection assembly and a mold closing assembly, and the mold splitting assembly, the liquid injection assembly and the mold closing assembly are arranged above the positioning carrier plate. The first transfer device can drive the positioning carrier plate to move right below the mold splitting assembly, the liquid injection assembly and the mold closing assembly; the die splitting assembly comprises a plurality of groups of stripping clamping jaws, and each group of stripping clamping jaws are symmetrically arranged and can be close to or far away from each other; the sides, close to each other, of the two stripping clamping jaws in each set extend oppositely to form wedge-shaped protrusions, and a first inclined face and a second inclined face are formed above and below the extending direction of the protrusions respectively. And during stripping, the bulge is inserted between the upper die and the lower die. Die splitting of the upper die and the lower die of the die is divided into two independent actions of stripping and separation, so that the situation that the upper die deviates or falls off at the moment of separation in one-time die splitting is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of contact lens manufacturing, and particularly relates to an automatic filling and mold closing device for contact lenses. Background Art

[0002] In the production and manufacturing process of contact lenses, the contact lens is formed by injecting liquid contact lens solution into the lower mold (concave mold), buckling the upper mold (convex mold) into the lower mold and fastening it, and then taking it out after curing. Existing molds for producing contact lenses are usually arranged in a circular pattern with multiple molds, including four-cavity, six-cavity, eight-cavity, etc. As Figure 5 shown is an eight-cavity contact lens mold. Usually, in a multi-cavity contact lens mold, the specifications of each mold are different, that is, the degrees of the formed contact lenses are different. For the convenience of mold transportation and to prevent confusion, usually, before injecting the contact lens liquid, the upper and lower molds of the mold are in an assembled state. When injecting the liquid, the upper mold needs to be opened first, and then the upper and lower molds are buckled together after injection.

[0003] In the prior art, the following problems usually occur in the manufacturing process of contact lenses: 1. Before injecting the liquid, the connection between the upper and lower molds is usually relatively tight. Usually, the lower mold is fixed, and then the upper mold is clamped or sucked upward by a clamping jaw or a suction cup to separate it. However, there are cases where it cannot be separated. At the same time, due to the overly tight connection, a large amount of friction and inertia need to be overcome at the moment of separation, which may cause the upper mold to shift or fall off, resulting in inaccurate assembly with the lower mold when closing the mold after injection; 2. When pressing and closing the mold, such as in the patent application of an automatic mold closing and welding device for a contact lens forming mold with the application number CN202210628455.2, a counterweight is provided at the upper end of each pressing fixture to ensure that the mold pressure at each cavity is consistent and stable. However, when this setting is used for pressing multiple groups of multi-cavity molds, it requires a large working space. At the same time, more counterweights also greatly increase the overall mass of the mechanism, which is not conducive to installation, maintenance, and also requires a stronger support mechanism for installation, increasing the equipment cost and usage cost; if an integral pressing setting is used, the pressure of each mold cannot be evenly distributed, resulting in inconsistent mold closing and a high defect rate. Therefore, how to solve the problems of unstable separation of the upper mold and consistent and stable mold closing during the production of contact lenses is a problem that those skilled in the art need to consider. Summary of the Invention

[0004] The object of the present invention is to provide an automatic filling and mold closing device for contact lenses to solve the problems in the prior art such as the unstable separation of the upper and lower molds and the poor mold closing consistency of multi-cavity molds.

[0005] The technical solution of the present invention is: an automatic filling and mold closing mechanism for contact lenses, including: a positioning carrier plate, and a mold splitting component, a liquid injection component and a mold closing component arranged above the positioning carrier plate. A first transfer device is connected to the positioning carrier plate, and the first transfer device can drive the positioning carrier plate to move directly below the mold splitting component, the liquid injection component and the mold closing component; The mold splitting component includes multiple groups of peeling jaws. Each group of peeling jaws is symmetrically arranged and can approach or move away from each other; on one side of the two peeling jaws in each group that approach each other, they extend towards each other to form a wedge-shaped protrusion, and a first inclined surface and a second inclined surface are respectively formed above and below the extending direction of the protrusion; during peeling, the two peeling jaws approach each other, and the protrusion is inserted between the upper mold and the lower mold.

[0006] Preferably, multiple groups of the peeling jaws are arranged in a circumferential arrangement, and the connection line at the center of the two peeling jaws in each group passes through the center of the circumferential arrangement of multiple groups of the peeling jaws.

[0007] Preferably, a material groove is arranged on the positioning carrier plate, the mold is placed in the material groove, and the upper end surface of the lower mold of the mold is not lower than the plane where the upper edge of the material groove is located; during peeling, the lower end surface of the peeling jaw abuts against the plane where the upper end surface of the material groove is located.

[0008] Preferably, the bottom of the material groove is provided with a through hole; a first positioning component is arranged directly below the mold splitting component. During peeling, the first transfer device drives the positioning carrier plate to move directly above the first positioning component, and the first suction cup component at the first positioning component moves upward and sucks the lower mold in the material groove.

[0009] Preferably, the liquid injection component includes multiple liquid injection needles and a first rotating device connected to the liquid injection needles; during liquid injection, the first transfer device drives the positioning carrier plate to move directly below the liquid injection component.

[0010] Preferably, the mold closing component includes multiple pressing components and a mounting plate that simultaneously connects multiple pressing components. The pressing component includes a suction nozzle and a pressing ring connected to the suction nozzle, and the pressing ring is fixedly sleeved and connected to the outer circle of the suction nozzle; The upper end of the pressing ring is connected to the mounting plate and can adjust the connection position with the mounting plate in the vertical direction.

[0011] Preferably, a second positioning component is arranged below the pressing component. During pressing, the first transfer device drives the positioning carrier plate to move directly above the second positioning component, and the second suction cup component at the second positioning component moves upward and sucks the lower mold in the material groove.

[0012] Preferably, the method for automatic filling and mold closing is: S1. The upper and lower molds are peeled off. The peeling jaws move downward until the bottom of the jaws touches the plane where the upper edge of the material trough is located. Each group of the peeling jaws moves towards each other. While the upper and lower molds remain assembled, they press the upper and lower molds upward and downward respectively to complete the peeling. S2. The upper and lower molds are separated. The pressing assembly moves downward until the suction nozzle touches the upper mold and the pressing ring touches the edge of the upper mold. The suction nozzle sucks the upper mold to separate the upper and lower molds. S3. The liquid injection process. The liquid injection needle moves downward to the lower mold. After liquid injection, the lower mold resets. S4. The upper and lower molds are closed. The pressing assembly moves downward until the upper mold touches the lower mold. The suction nozzle loses pressure and continues to press the upper and lower molds downward.

[0013] Preferably, when the upper and lower molds are peeled off, the protrusions move towards each other and insert between the upper and lower molds. The first inclined surface and the second inclined surface press the upper and lower molds upward and downward respectively.

[0014] Preferably, the automatic filling and closing mold device includes a material tray transfer mechanism, a transfer mechanism, and a mold blanking mechanism. The material tray transfer mechanism includes a material tray loading component and a material tray unloading component. The transfer mechanism includes a robotic arm. A third suction cup assembly and a fourth suction cup assembly are connected to the robotic arm. The robotic arm drives the third suction cup assembly to pick up the material tray at the material tray loading component and transfer it to the transfer table at the transfer mechanism. Then, it drives the fourth suction cup assembly to pick up the mold at the transfer table and transfer it to the positioning carrier plate. After the mold is filled and closed, the fourth suction cup assembly picks up the mold and transfers it to the mold blanking mechanism. The robotic arm drives the third suction cup assembly to pick up the empty material tray on the transfer table and transfer it to the material tray unloading component.

[0015] Compared with the prior art, the advantages of the present invention are as follows: (1) In the present invention, the demolding of the upper and lower molds of the mold is divided into two separate actions: peeling and separating. During peeling, the upper and lower molds remain assembled, while during separating, the upper and lower molds are demolded, avoiding the situation where the upper mold is offset or detached instantaneously during one-time demolding. (2) When closing the mold, compared with the setting of separately arranging counterweights for each mold to press and close, the overall space of the equipment is greatly reduced. At the same time, through the separate setting of the pressure components, each pressure component can be adjusted separately to ensure the consistency of the pressure when closing the mold. Description of the Drawings

[0016] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1Schematic structural diagram of the automatic filling and mold clamping device for contact lenses of the present invention; Figure 2 Top view structural diagram of the automatic filling and mold clamping device for contact lenses of the present invention; Figure 3 Schematic structural diagram of the transfer mechanism of the present invention; Figure 4 Schematic structure of the filling and mold clamping mechanism of the present invention Figure 1 ; Figure 5 Schematic structure of the filling and mold clamping mechanism of the present invention Figure 2 ; Figure 6 Schematic structural diagram of the mold splitting component of the present invention; Figure 7 is Figure 6 Enlarged structural diagram at position A in; Figure 8 Schematic structural diagram of the liquid injection component of the present invention; Figure 9 Schematic structural diagram of the mold clamping component of the present invention; Figure 10 is Figure 9 Enlarged structural diagram at position B in.

[0017] Among them: tray transfer mechanism 1, tray loading component 11, tray unloading component 12 Transfer mechanism 2, robotic arm 21, transfer table 22, third suction cup assembly 23, fourth suction cup assembly 24; Filling and mold clamping mechanism 3, positioning carrier plate 31, first transfer device 311, material tank 312, mold splitting component 32, peeling gripper 321, protrusion 322, first inclined surface 3221, second inclined surface 3222, liquid injection component 33, liquid injection needle 331, first rotating device 332, liquid return funnel 333, mold clamping component 34, pressing component 341, pressing ring 3411, suction nozzle 3412, mounting plate 342, downward pressing drive device 343, first positioning component 35, first suction cup assembly 351, second positioning component 36, second suction cup assembly 361; Mold unloading mechanism 4; Mold 5. Specific embodiments

[0018] The following combines specific embodiments to further elaborate on the content of the present invention: As Figures 1-2As shown, the present invention is applied to the filling and mold closing in the manufacturing process of contact lenses. The robotic arm picks up the tray with contact lens molds at the tray loading assembly through the third suction cup assembly and transfers it to the transfer table for temporary storage; then picks up the molds on the tray through the fourth suction cup assembly and transfers them to the positioning carrier plate; after all the molds on the tray are picked up, the robotic arm picks up the empty tray through the third suction cup assembly and transfers it to the tray unloading assembly to complete the unloading of the empty tray; after the molds are filled and molded at the filling and mold closing mechanism, they are picked up through the fourth suction cup assembly and transferred to the mold unloading mechanism under the drive of the robotic arm to complete the unloading of the molds. Among them, when the molds are placed on the positioning carrier plate, first, the upper mold and the lower mold are peeled off at the mold splitting assembly; then the upper mold is taken out at the mold closing assembly to complete the separation of the upper mold and the lower mold; then the lower mold is injected with liquid at the liquid injection assembly; then the upper mold and the lower mold are closed at the mold closing assembly; finally, it returns to the initial position and is picked up and taken out by the fourth suction cup assembly. In this embodiment, the processes of mold peeling, mold splitting and liquid injection, and mold closing require a certain amount of time. Therefore, by setting two filling and pressing mechanisms on one device and using the transfer mechanism to transfer the trays and molds to the two filling and pressing mechanisms simultaneously, the requirements of the production rhythm can be met.

[0019] Specifically: The filling and mold closing equipment includes: a tray transfer mechanism 1, a transfer mechanism 2, a filling and mold closing mechanism 3, and a mold unloading mechanism 4; the tray transfer mechanism 1 includes a tray loading assembly 11 and a tray unloading assembly 12; The transfer mechanism 2 includes a robotic arm 21 and a transfer table 22. The third suction cup assembly 23 and the fourth suction cup assembly 24 are connected to the robotic arm 21. The robotic arm 21 drives the third suction cup assembly 23 to pick up the tray at the tray loading assembly 11 and transfer it to the transfer table 22; then drives the fourth suction cup assembly 24 to pick up the molds at the transfer table 22 and transfer them to the positioning carrier plate 31; after the molds are filled and molded, the fourth suction cup assembly 24 picks up the molds and transfers them to the mold unloading mechanism 4; the robotic arm 21 drives the third suction cup assembly 23 to pick up the empty tray on the transfer table 22 and transfer it to the tray unloading assembly 12.

[0020] In this embodiment, the third suction cup assembly 23 and the fourth suction cup assembly 24 are connected to the same robotic arm 21. When the molds are filled and molded, the following content in this embodiment takes the petal-shaped eight-cavity mold as an example, and the filling and mold closing operations of three groups of eight-cavity molds are carried out simultaneously.

[0021] As Figures 4-10 shown, the filling and mold closing mechanism 3 includes a positioning carrier plate 31 and a mold splitting assembly 32, a liquid injection assembly 33, and a mold closing assembly 34 arranged above the positioning carrier plate 31. A first transfer device 311 is connected to the positioning carrier plate 31, and the first transfer device 311 can drive the positioning carrier plate 31 to move directly below the mold splitting assembly 32, the liquid injection assembly 33, and the mold closing assembly 34.

[0022] The mold splitting assembly 32 includes multiple groups of stripping jaws 321. Each group of stripping jaws 321 is symmetrically arranged and can approach or move away from each other. On the side where the two stripping jaws 321 of each group approach each other, they extend towards each other to form a wedge-shaped protrusion 322. A first inclined surface 3221 and a second inclined surface 3222 are respectively formed above and below the extending direction of the protrusion 322. The multiple groups of stripping jaws 321 are arranged in a circular pattern, and the connection line at the center of the two stripping jaws 321 in each group passes through the center of the circular arrangement of the multiple groups of stripping jaws 321. In this embodiment, the stripping jaws 321 are arranged in twenty-four groups, and every eight groups are arranged in a circular pattern to respectively correspond to the eight molds in the eight-cavity mold.

[0023] A material groove 312 is provided on the positioning carrier plate 31, and the mold is placed in the material groove 312. When the mold is placed on the positioning carrier plate 31 by the fourth suction cup assembly 24, the mold is just placed in the material groove 312. At this time, the plane where the upper end surface of the lower mold of the mold is located is not lower than the plane where the upper edge of the material groove 312 is located. The stripping jaws 321 are initially in an open state and move downward until their lower end surfaces contact the plane where the upper end surface of the material groove 312 is located, and the mold is located between the two stripping jaws 321. Then, the two stripping jaws 321 approach each other. When the protrusion 322 is inserted between the upper mold and the lower mold for stripping, the first inclined surface 3221 abuts against the upper mold upward, and the second inclined surface 3222 abuts against the lower mold downward, so that the upper mold and the lower mold are stripped.

[0024] It should be noted that the inclination degree of the second inclined surface 3222 is small. When it abuts against the lower mold downward, it will not cause the whole lower mold to move downward, and the deformation of the lower mold due to the abutment can be ignored. In addition, after the stripping is completed, the two stripping jaws 321 move away from each other and then move upward to reset, so that only the upper mold and the lower mold are stripped, and the upper mold is still placed on the upper end of the lower mold, which is convenient for the separation of the upper mold at the mold closing station.

[0025] Furthermore, the bottom of the material groove 312 is provided with a through hole. A first positioning assembly 35 is arranged directly below the mold splitting assembly 32. During stripping, the first transfer device 311 drives the positioning carrier plate 31 to move directly above the first positioning assembly 35, and the first suction cup assembly 351 at the first positioning assembly 35 moves upward and sucks the lower mold in the material groove 312 to position the mold, which can avoid displacement during the stripping operation. After the stripping is completed, the first suction cup assembly 351 moves downward and resets to separate from the lower mold.

[0026] The liquid injection assembly 33 includes a plurality of liquid injection needles 331 and a first rotating device 332 connected to the liquid injection needles 331; during liquid injection, the first transfer device 311 drives the positioning carrier 31 to move directly below the liquid injection assembly 33. In this embodiment, the lower mold is injected through the liquid injection needles 331; a liquid return funnel 333 is provided directly below the liquid injection assembly 33. The number of liquid injection needles 331 is set to four, and through the rotation of the first rotating device 332, the injection of eight molds can be completed in two times.

[0027] After the upper and lower molds of the mold are peeled off, the first transfer device 311 drives the positioning carrier 31 to move to the mold closing assembly 34.

[0028] The mold closing assembly 34 includes a plurality of pressing components 341 and a mounting plate 342 that simultaneously connects the plurality of pressing components 341. The pressing component 341 includes a suction nozzle 3412 and a pressing ring 3411 connected to the suction nozzle 3412. The pressing ring 3411 is fixedly sleeved and connected to the outer circle of the suction nozzle 3412. The upper end of the pressing ring 3411 is connected to the mounting plate 342 and can adjust its connection position with the mounting plate 342 in the vertical direction. In this embodiment, eight pressing components 341 are grouped into one set, and a total of three sets are provided; the upper ends of the three sets of pressing components 341 are simultaneously connected to the downward pressing drive device 343, and a second positioning component 36 is provided below the pressing component 341.

[0029] The pressing component 341 performs two sets of actions of separating the upper mold and pressing the upper mold before and after liquid injection filling respectively. Specifically, when the mold is peeled off at the mold separating assembly 32, it is transferred by the first transfer device 311 directly below the pressing component 341. At this time, it is also directly above the second positioning component 36. The second suction cup component 361 at the second positioning component 36 moves upward and sucks the lower mold of the mold in the material tank 312 to achieve lower mold positioning; then, the pressing component 341 moves downward so that the suction nozzle 3412 touches the upper mold and sucks the upper mold. Among them, the suction nozzle 3412 first touches the upper mold downward, and then continues to move downward so that the lower end surface of the pressing ring 3411 touches the upper end surface of the upper mold. Then, the suction nozzle 3412 generates negative pressure to suck the upper mold to ensure that when the upper mold is sucked, its posture can be automatically adjusted; then, the second suction cup component 361 resets, and then under the drive of the first transfer device 311, the lower mold moves directly below the liquid injection assembly 33, and the liquid injection is completed through the liquid injection assembly 33; then, it returns directly below the pressing component 341 under the drive of the first transfer device 311; the second positioning component 36 positions the lower mold again, and then the pressing component 341 moves downward and drives the upper mold to move downward to assemble with the lower mold. After assembly, it can stay for a certain time to complete pressure holding; after mold closing, the mold moves to the side of the peeling component away from the mold closing component 34 under the drive of the first transfer device 311, waiting for the fourth suction cup component 24 to pick up the material.

[0030] Among them, in this embodiment, the source of the downward pressing force of all the pressing components 341 is the downward pressing driving device 343. Compared with the traditional setting of arranging a separate counterweight on each pressing component 341, the occupied space of the overall mechanism is greatly reduced. However, the pressure at each pressing component 341 is inconsistent. Therefore, each pressing component 341 is separately arranged. During adjustment, a pressure sensor can be arranged directly below each pressing component 341. When the downward pressing driving device 343 drives all the pressing components 341 to press downward simultaneously, each pressing component 341 is adjusted according to the pressure value of the pressure sensor, that is, the vertical position of each pressing ring 3411 on the mounting plate 342 is adjusted so that the force when each pressing ring 3411 presses against the lower die is consistent.

[0031] In addition, in this embodiment, the peeling and separation of the upper die are divided into two action steps. Compared with the traditional setting of peeling or separating the upper die by pulling, it avoids the situations of inability to separate, damage to the upper die, or inaccurate die closing caused by the offset of the positions of the upper die or the lower die after separation.

[0032] In this embodiment, the automatic filling and die closing method is as follows: S1. Peeling of the upper and lower dies. The peeling jaws 321 move downward until the bottom thereof abuts against the plane where the upper edge of the material groove 312 is located. Each group of peeling jaws 321 moves towards each other. In the state where the upper die and the lower die are kept assembled, the upper die and the lower die are respectively pressed upward and downward by the first inclined surface 3221 and the second inclined surface 3222 at the protrusion 322 to complete the peeling. After peeling, the upper die is still at the upper end of the lower die, but their connection is no longer tight. S2. Separation of the upper and lower dies. The pressing component 341 moves downward until the suction nozzle 3412 abuts against the groove of the upper die and the pressing ring 3411 abuts against the edge of the upper die. The suction nozzle 3412 sucks the upper die and moves upward to separate the upper die and the lower die. At this time, even if the position of the upper die at the peeling component is offset, when the upper end surface edge of the upper die abuts against the lower end surface of the pressing ring 3411, the upper end surface of the upper die will be automatically adjusted to a horizontal state. It should be noted that the suction nozzle 3412 first abuts against the upper die downward, then continues to move downward so that the lower end surface of the pressing ring 3411 abuts against the upper end surface of the upper die, and then the suction nozzle 3412 generates negative pressure to suck the upper die to ensure that the attitude of the upper die can be automatically adjusted when it is sucked.

[0033] S3. Liquid injection process. After the upper and lower dies are separated, the lower die moves to the liquid injection component 33 with the positioning carrier plate 31. The liquid injection needle 331 moves downward to the lower die, and after liquid injection, the lower die resets. If there is liquid leakage or other situations, the liquid return funnel below can be used for recovery; S4. The upper and lower molds are closed. After injection, the lower mold moves again with the positioning carrier plate 31 to the lower part of the pressing component 341. The pressing component 341 moves downward until the upper mold touches the lower mold. The suction nozzle 3412 loses pressure and continues to move downward. By pressing the upper mold through the pressing ring 3411, the upper and lower molds are tightly pressed together and can be kept in the pressed state for a certain period of time to perform pressure holding.

[0034] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. An automatic filling and clamping mechanism for contact lenses, It is characterized in that include: A positioning carrier plate and a mold splitting assembly, a liquid injection assembly and a mold closing assembly arranged above the positioning carrier plate, wherein the positioning carrier plate is connected to a first transfer device, and the first transfer device can drive the positioning carrier plate to move directly below the mold splitting assembly, the liquid injection assembly and the mold closing assembly; The mold splitting assembly comprises a plurality of groups of stripping jaws, each group of the stripping jaws are symmetrically arranged and can be moved closer to or farther from each other; the two stripping jaws of each group are extended toward each other on one side close to each other to form a wedge-shaped protrusion, and a first inclined surface and a second inclined surface are formed above and below the extending direction of the protrusion respectively; during stripping, the two stripping jaws are moved closer to each other, and the protrusion is inserted between the upper mold and the lower mold; The mold closing assembly includes a plurality of pressing assemblies, and the pressing assemblies include a suction nozzle and a pressing ring connected to the suction nozzle, and the pressing ring is fixedly sleeved and connected to the outer ring of the suction nozzle; before liquid injection, the suction nozzle sucks the peeled upper mold to separate the upper mold; after liquid injection, the pressing ring presses the upper mold to press it with the lower mold.

2. The contact lens automatic filling and clamping mechanism according to claim 1, Features: The plurality of groups of stripping jaws are arranged in a circle, and a line connecting the middle points of two stripping jaws in each group passes through the center of the circle in which the plurality of groups of stripping jaws are arranged.

3. The contact lens automatic filling and clamping mechanism according to claim 2, Features: The positioning carrier is provided with a material trough, the mold is placed in the material trough, and the upper end surface of the lower mold of the mold is not lower than the plane where the upper end edge of the material trough is located; when peeling, the lower end surface of the peeling clamp contacts the plane where the upper end surface of the material trough is located.

4. The contact lens automatic filling and clamping mechanism according to claim 3, Features: The bottom of the material trough is set to be through; a first positioning component is set just below the mold separation component. During peeling, the first transfer device drives the positioning carrier to move to just above the first positioning component, and the first suction cup component at the first positioning component moves upward and sucks the lower mold of the mold in the material trough.

5. The contact lens automatic filling and clamping mechanism according to claim 4, Features: The injection assembly includes a plurality of injection needles and a first rotating device connected to the injection needles; during injection, the first transfer device drives the positioning carrier plate to move to the bottom of the injection assembly.

6. The contact lens automatic filling and clamping mechanism according to claim 5, Features: The clamping assembly comprises a mounting plate, the upper end of the pressure ring is connected to the mounting plate, and the connection position with the mounting plate can be adjusted in the vertical direction.

7. The contact lens automatic filling and clamping mechanism according to claim 6, Features: A second positioning assembly is provided below the pressing assembly. During pressing, the first transfer device drives the positioning carrier to move to just above the second positioning assembly, and the second suction cup assembly at the second positioning assembly moves upward and absorbs the lower mold of the mold in the material trough.

8. The contact lens automatic filling and clamping mechanism according to claim 7, It is characterized in that The method of automatically filling and closing the mold is: S1. Upper and lower mold peeling. The peeling jaws move downward until the bottom of the jaws touches the plane where the upper edge of the material trough is located. Each group of the peeling jaws moves towards each other. While the upper and lower molds remain assembled, they press the upper and lower molds upward and downward respectively to complete the peeling. S2. Upper and lower mold separation. The pressing assembly moves downward until the suction nozzle touches the upper mold and the pressing ring touches the edge of the upper mold. The suction nozzle sucks the upper mold to separate the upper and lower molds. S3. Liquid injection process. The liquid injection needle moves downward to the lower mold. After liquid injection, the lower mold returns to its original position. S4. Upper and lower mold clamping. The pressing assembly moves downward until the upper mold touches the lower mold. The suction nozzle loses pressure and continues to press the upper and lower molds together.

9. An automatic filling and clamping mechanism for contact lenses according to claim 8, characterized in that when the upper and lower molds are peeled, the protrusions move towards each other and insert between the upper and lower molds. The first inclined surface and the second inclined surface press the upper and lower molds upward and downward respectively.

10. An automatic filling and clamping device applying the automatic filling and clamping mechanism for contact lenses according to any one of claims 1-7, characterized in that it includes a tray transfer mechanism, a transfer mechanism and a mold discharging mechanism; the tray transfer mechanism includes a tray loading component and a tray unloading component; the transfer mechanism includes a robotic arm. A third suction cup assembly and a fourth suction cup assembly are connected to the robotic arm. The robotic arm drives the third suction cup assembly to pick up the tray at the tray loading component and transfer it to the transfer table at the transfer mechanism. Then, it drives the fourth suction cup assembly to pick up the mold at the transfer table and transfer it to the positioning carrier plate. After the mold is filled and clamped, the fourth suction cup assembly picks up the mold and transfers it to the mold discharging mechanism. The robotic arm drives the third suction cup assembly to pick up the empty tray on the transfer table and transfer it to the tray unloading component.

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