An automatic filling and molding device for contact lenses

Abstract

This invention relates to the field of contact lens manufacturing, specifically to an automated filling and molding device for contact lenses. The device includes: a positioning carrier plate and a mold-separating assembly, an injection assembly, and a molding assembly disposed above the positioning carrier plate. A first transfer device is connected to the positioning carrier plate, which can drive the positioning carrier plate to move directly below the mold-separating assembly, the injection assembly, and the molding assembly. The mold-separating assembly includes multiple sets of peeling claws, each set of which is symmetrically arranged and can move closer or further apart. Two peeling claws in each set extend towards each other on their closest sides to form a wedge-shaped protrusion. A first inclined surface and a second inclined surface are formed above and below the extension direction of the protrusion, respectively. During peeling, the protrusion is inserted between the upper and lower molds. This method divides the mold separation of the upper and lower molds into two separate actions: peeling and separation, avoiding the possibility of the upper mold shifting or falling off during a single mold separation process.

Description

Technical Field

[0001] This invention relates to the field of contact lens manufacturing technology, and in particular to an automatic filling and molding device for contact lenses. Background Technology

[0002] In the manufacturing process of contact lenses, liquid contact lenses are injected into a lower mold (concave mold), and an upper mold (convex mold) is inserted into and secured to the lower mold. After solidification, the lens is removed. Existing molds for contact lens production typically consist of multiple molds arranged in a circular pattern, including four-cavity, six-cavity, eight-cavity, etc. Figure 5 The image shows an eight-cavity contact lens mold. Typically, in multi-cavity contact lens molds, each mold has a different specification, meaning the resulting contact lenses will have different prescriptions. To facilitate mold transport and prevent confusion, the upper and lower molds are usually assembled before contact lens solution injection. During injection, the upper mold needs to be opened first, and after injection, the upper and lower molds are then snapped together.

[0003] In the existing technology, the following problems are usually encountered in the manufacturing process of contact lenses: 1. Before liquid injection, the connection between the upper and lower molds is usually quite tight. The lower mold is usually fixed, and then the upper mold is clamped or sucked up using grippers or suction cups to separate them. However, there are cases where separation is impossible. Also, due to the overly tight connection, significant friction and inertia must be overcome at the moment of separation, which can cause the upper mold to shift or detach, resulting in inaccurate assembly with the lower mold during mold closing after liquid injection; 2. During pressing and mold closing, as described in application number CN202210628455.2 regarding a contact lens molding mold... Patent applications for automatic mold-closing and welding devices employ counterweights at the top of each pressing fixture to ensure consistent and stable mold pressure at each acupoint. However, this setup requires significant workspace when pressing multiple sets of molds with multiple acupoints. Furthermore, the increased counterweights significantly increase the overall weight of the mechanism, hindering installation and maintenance, and necessitating stronger support structures, thus increasing equipment and operating costs. Conversely, an integrated pressing system can lead to uneven pressure distribution across molds, resulting in inconsistent mold closure and a high defect rate. Therefore, addressing the issues of unstable upper mold separation and consistent, stable mold closure during contact lens production is crucial for those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic filling and molding device for contact lenses, so as to solve the problems of unstable separation of upper and lower molds and poor consistency of multi-cavity molds in the prior art.

[0005] The technical solution of the present invention is: an automatic filling and molding mechanism for contact lenses, comprising: a positioning carrier plate and a mold splitting assembly, an injection assembly and a molding assembly disposed above the positioning carrier plate, wherein 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 assembly, the injection assembly and the molding assembly;

[0006] The mold-separating assembly includes multiple sets of peeling claws, each set of peeling claws being symmetrically arranged and able to approach or move away from each other; the two peeling claws in each set extend towards each other on their sides to form a wedge-shaped protrusion, and a first inclined surface and a second inclined surface are formed above and below the extension direction of the protrusion, respectively; during peeling, the two peeling claws approach each other, and the protrusion is inserted between the upper mold and the lower mold.

[0007] Preferably, the multiple sets of peeling claws are arranged in a circular pattern, and the line connecting the two peeling claws in each set passes through the center of the circle where the multiple sets of peeling claws are arranged in a circular pattern.

[0008] Preferably, the positioning carrier plate is provided with a material groove, the mold is placed in the material groove, and the upper end face of the lower mold is not lower than the plane where the upper edge of the material groove is located; during peeling, the lower end face of the peeling claw abuts against the plane where the upper end face of the material groove is located.

[0009] Preferably, the bottom of the material groove is through-hole; a first positioning component is provided directly below the mold splitting component. During peeling, the first transfer device drives the positioning plate to move directly above the first positioning component, and the first suction cup component at the first positioning component moves upward and sucks up the lower mold in the material groove.

[0010] Preferably, 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 directly below the injection assembly.

[0011] Preferably, the mold clamping assembly includes multiple pressing components and a mounting plate that connects the multiple pressing components simultaneously. The pressing component includes a suction nozzle and a pressure ring connected to the suction nozzle. The pressure ring is fixedly sleeved and connected to the outer ring of the suction nozzle.

[0012] 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.

[0013] Preferably, a second positioning component is provided below the pressing component. During pressing, the first transfer device drives the positioning plate to move directly above the second positioning component, and the second suction cup component at the second positioning component moves upward and sucks up the lower mold of the mold in the material groove.

[0014] The preferred method for automatic filling and mold closing is as follows:

[0015] S1. The upper and lower molds are peeled off. The peeling claws move downwards until their bottoms abut against the plane where the upper edge of the material groove is located. Each set of peeling claws moves towards each other. While the upper and lower molds are still assembled, they press the upper and lower molds upwards and downwards respectively to complete the peeling.

[0016] S2. The upper and lower molds separate. The pressing assembly moves downward until the suction nozzle abuts against the upper mold and the pressure ring abuts against the edge of the upper mold. The suction nozzle picks up the upper mold and separates the upper and lower molds.

[0017] S3, Liquid injection process: The injection needle moves downward to the lower mold, and the lower mold is reset after liquid injection;

[0018] S4. The upper and lower molds close together. 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.

[0019] Preferably, during the peeling of the upper and lower molds, the protrusions move towards each other and insert between the upper and lower molds, and the first inclined surface and the second inclined surface press against the upper and lower molds upward and downward, respectively.

[0020] Preferably, the automatic filling and mold closing equipment includes a tray transfer mechanism, a transfer mechanism, and a mold unloading mechanism;

[0021] The tray transfer mechanism includes a tray loading assembly and a tray unloading assembly;

[0022] The transfer mechanism includes a robotic arm with a third suction cup assembly and a fourth suction cup assembly connected to it. The robotic arm drives the third suction cup assembly to pick up the material tray at the material tray loading assembly 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 unloading 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 assembly.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] (1) In this invention, the separation of the upper mold and the lower mold is divided into two separate actions: peeling and separation. During peeling, the upper mold and the lower mold remain in an assembled state, while during separation, the upper mold and the lower mold separate, thus avoiding the occurrence of the upper mold shifting or falling off at the moment of separation during a one-time mold separation.

[0025] (2) When the mold is closed, compared with the setting of setting a counterweight for each mold to press together, the overall space of the equipment is greatly reduced; at the same time, by setting the pressure components separately, each pressure component can be adjusted separately to ensure the consistency of pressure when the mold is closed. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 This is a schematic diagram of the automatic filling and molding device for contact lenses according to the present invention;

[0028] Figure 2 This is a top view of the automatic filling and molding device for contact lenses described in this invention.

[0029] Figure 3 This is a schematic diagram of the transfer mechanism described in this invention;

[0030] Figure 4 This is a schematic diagram of the filling and mold closing mechanism described in this invention. Figure 1 ;

[0031] Figure 5 This is a schematic diagram of the filling and mold closing mechanism described in this invention. Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the structure of the modular assembly described in this invention;

[0033] Figure 7 for Figure 6 Enlarged structural diagram at point A;

[0034] Figure 8 This is a schematic diagram of the liquid injection assembly described in this invention;

[0035] Figure 9 This is a schematic diagram of the mold clamping assembly described in this invention;

[0036] Figure 10 for Figure 9 Enlarged structural diagram at point B.

[0037] Among them: tray transfer mechanism 1, tray loading assembly 11, tray unloading assembly 12

[0038] Transfer mechanism 2, robotic arm 21, transfer table 22, third suction cup assembly 23, fourth suction cup assembly 24;

[0039] The system includes a filling and mold closing mechanism 3, a positioning carrier plate 31, a first transfer device 311, a material trough 312, a mold parting assembly 32, a peeling gripper 321, a protrusion 322, a first inclined surface 3221, a second inclined surface 3222, an injection assembly 33, an injection needle 331, a first rotating device 332, a return funnel 333, a mold closing assembly 34, a pressing assembly 341, a pressure ring 3411, a suction nozzle 3412, a mounting plate 342, a downward pressure drive device 343, a first positioning assembly 35, a first suction cup assembly 351, a second positioning assembly 36, and a second suction cup assembly 361.

[0040] Mold feeding mechanism 4;

[0041] Mold 5. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to specific embodiments:

[0043] like Figures 1-2 As shown, this invention is applied to the filling and mold closing process in contact lens manufacturing. A robotic arm picks up a tray containing contact lens molds from the tray loading assembly via a third suction cup assembly and transfers it to a transfer table for temporary storage. Then, it picks up the molds from the tray via a fourth suction cup assembly and transfers them to a positioning carrier plate. Once all molds on the tray have been picked up, the robotic arm picks up an empty tray via the third suction cup assembly and transfers it to the tray unloading assembly, completing the unloading of the empty tray. After the molds are filled and closed at the filling and mold closing mechanism, they are picked up by the fourth suction cup assembly and transferred to the mold unloading mechanism under the drive of the robotic arm, completing the unloading of the molds. Specifically, after the mold is placed on the positioning carrier plate, the upper and lower molds are first separated at the mold separating assembly; then, the upper mold is removed at the mold closing assembly, completing the separation of the upper and lower molds; then, liquid is injected into the lower mold at the liquid injection assembly; finally, the upper and lower molds are closed at the mold closing assembly; and finally, the mold returns to its initial position and is picked up and removed by the fourth suction cup assembly. In this embodiment, the processes of mold peeling, mold separation and liquid injection, and mold closing require a certain amount of time. Therefore, by setting two raw filling and pressing mechanisms on one device and transferring the material trays and molds to the two filling and pressing mechanisms simultaneously through a transfer mechanism, the production rhythm requirements can be met.

[0044] Specifically:

[0045] The filling and mold closing equipment includes: a material tray transfer mechanism 1, a transfer mechanism 2, a filling and mold closing mechanism 3, and a mold unloading mechanism 4; the material tray transfer mechanism 1 includes a material tray loading assembly 11 and a material tray unloading assembly 12;

[0046] The transfer mechanism 2 includes a robotic arm 21 and a transfer table 22. The robotic arm 21 is connected to a third suction cup assembly 23 and a fourth suction cup assembly 24. The robotic arm 21 drives the third suction cup assembly 23 to pick up the material tray at the material tray loading assembly 11 and transfer it to the transfer table 22. Then, it drives the fourth suction cup assembly 24 to pick up the mold at the transfer table 22 and transfer it to the positioning carrier plate 31. After the mold is filled and closed, the fourth suction cup assembly 24 picks up the mold and transfers it to the mold unloading mechanism 4. The robotic arm 21 drives the third suction cup assembly 23 to pick up the empty material tray on the transfer table 22 and transfer it to the material tray unloading assembly 12.

[0047] 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 mold is being filled and closed, the following description in this embodiment uses a petal-shaped eight-cavity mold, with three sets of eight-cavity molds being filled and closed simultaneously as an example.

[0048] like Figures 4-10 As shown, the filling and mold closing mechanism 3 includes a positioning carrier plate 31 and a mold splitting assembly 32, an injection assembly 33 and a mold closing assembly 34 disposed 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 injection assembly 33 and the mold closing assembly 34.

[0049] The mold parting assembly 32 includes multiple sets of peeling claws 321, each set of peeling claws 321 being symmetrically arranged and capable of moving closer or further apart from each other; the two peeling claws 321 in each set extend towards each other on their adjacent sides to form a wedge-shaped protrusion 322, and a first inclined surface 3221 and a second inclined surface 3222 are formed above and below the extending direction of the protrusion 322, respectively. The multiple sets of peeling claws 321 are arranged circumferentially, and the line connecting the two peeling claws 321 in each set passes through the center of the circumference of the multiple sets of peeling claws 321. In this embodiment, there are twenty-four sets of peeling claws 321, with eight sets arranged circumferentially to correspond to the eight molds in the eight-cavity mold.

[0050] 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 face of the lower mold is located is not lower than the plane where the upper edge of the material groove 312 is located. The peeling claws 321 are initially in an open state and move downward until their lower end face touches the plane where the upper end face of the material groove 312 is located, and the mold is between the two peeling claws 321. Afterward, the two peeling claws 321 approach each other, and the protrusion 322 is inserted between the upper mold and the lower mold for peeling. The first inclined surface 3221 touches the upper mold upward, and the second inclined surface 3222 touches the lower mold downward, so that the upper mold and the lower mold are peeled off.

[0051] It should be noted that the inclination of the second inclined surface 3222 is relatively small. When it contacts the lower mold downwards, it will not cause the lower mold to move downwards as a whole, and the deformation of the lower mold caused by the contact is negligible. In addition, after the peeling is completed, the two peeling claws 321 move upwards to reset after moving away from each other, so that the upper mold and the lower mold are only peeled, and the upper mold is still placed on top of the lower mold to facilitate the separation of the upper mold at the mold closing station.

[0052] Furthermore, the bottom of the material groove 312 is through-hole. A first positioning component 35 is located directly below the mold parting assembly 32. During peeling, the first transfer device 311 drives the positioning carrier plate 31 to move directly above the first positioning component 35. The first suction cup component 351 at the first positioning component 35 moves upward and sucks up the lower mold in the material groove 312 to position the mold and prevent displacement during the peeling operation. After peeling is completed, the first suction cup component 351 moves downward and resets to separate from the lower mold.

[0053] The injection assembly 33 includes multiple injection needles 331 and a first rotating device 332 connected to the injection needles 331. During injection, the first transfer device 311 drives the positioning carrier plate 31 to move directly below the injection assembly 33. In this embodiment, the lower mold is injected with liquid through the injection needles 331; a return funnel 333 is provided directly below the injection assembly 33. The number of injection needles 331 is set to four, and the injection of liquid into eight molds can be completed in two stages by rotating the first rotating device 332.

[0054] After the upper and lower molds of the mold are separated, the first transfer device 311 drives the positioning carrier plate 31 to move to the mold closing assembly 34.

[0055] The mold clamping assembly 34 includes multiple pressing components 341 and a mounting plate 342 that connects the multiple pressing components 341. Each pressing component 341 includes a suction nozzle 3412 and a pressure ring 3411 connected to the suction nozzle 3412. The pressure ring 3411 is fixedly sleeved on the outer ring of the suction nozzle 3412. The upper end of the pressure ring 3411 is connected to the mounting plate 342, and its connection position with the mounting plate 342 can be adjusted vertically. In this embodiment, eight pressing components 341 are grouped together, and three groups are configured. The upper ends of the three groups of pressing components 341 are simultaneously connected to the downward pressing drive device 343, and a second positioning component 36 is provided below each pressing component 341.

[0056] Before and after liquid injection filling, the pressing assembly 341 performs two sets of actions: separating the upper mold and pressing the upper mold. Specifically, when the mold is separated at the mold separating assembly 32, it is transferred by the first transfer device 311 to directly below the pressing assembly 341. At this time, it is also directly above the second positioning assembly 36. The second suction cup assembly 361 at the second positioning assembly 36 moves upward and sucks up the lower mold of the mold in the material groove 312 to achieve lower mold positioning. Afterward, the pressing assembly 341 moves downward, so that the suction nozzle 3412 abuts against the upper mold and sucks up the upper mold. In this process, the suction nozzle 3412 first touches the upper mold downwards, and then continues downwards until the lower end face of the pressure ring 3411 touches the upper end face of the upper mold. Then, the suction nozzle 3412 generates negative pressure to suck up the upper mold, ensuring that the upper mold can automatically adjust its posture when it is sucked up. After that, the second suction cup assembly 361 resets, and then the lower mold moves to the underside of the injection assembly 33 under the drive of the first transfer device 311, and the injection is completed by the injection assembly 33. Then, under the drive of the first transfer device 311, it returns to the underside of the pressing assembly 341. The second positioning assembly 36 positions the lower mold again, and then the pressing assembly 341 moves downwards and drives the upper mold to move downwards to assemble with the lower mold. After assembly, it can stay for a certain period of time to complete the pressure holding. After the mold is closed, the mold moves to the side of the peeling assembly away from the mold closing assembly 34 under the drive of the first transfer device 311, waiting for the fourth suction cup assembly 24 to pick up the material.

[0057] In this embodiment, the downward pressing force of all pressing components 341 originates from the downward pressing drive device 343. Compared to the traditional method of setting a separate counterweight on each pressing component 341, this greatly reduces the overall space occupied by the mechanism. However, it also results in inconsistent pressure at each pressing component 341. Therefore, each pressing component 341 is set individually. During adjustment, a pressure sensor can be set directly below each pressing component 341. When the downward pressing drive device 343 drives all pressing components 341 to press down simultaneously, the pressure value of the pressure sensor is used to adjust each pressing component 341, that is, to adjust the vertical position of each pressing ring 3411 on the mounting plate 342, so that the force of each pressing ring 3411 pressing against the lower mold is consistent.

[0058] In addition, in this embodiment, the peeling and separation of the upper mold are divided into two action steps. Compared with the traditional pull-type upper mold peeling or separation, this avoids the situation where the upper mold cannot be separated or is damaged, or the position of the upper or lower mold is offset after separation, resulting in inaccurate mold closing.

[0059] In this embodiment, the automatic filling and mold closing method is as follows:

[0060] S1. Upper and lower mold separation. The separation claws 321 move downwards until their bottoms abut against the plane of the upper edge of the material groove 312. Each set of separation claws 321 moves towards each other. While the upper and lower molds remain assembled, the first inclined surface 3221 and the second inclined surface 3222 at the protrusion 322 press the upper and lower molds upwards and downwards respectively to complete the separation. After separation, the upper mold is still above the lower mold, but the connection between the two is no longer tight.

[0061] S2. Separation of upper and lower molds. The pressing assembly 341 moves downward until the suction nozzle 3412 abuts against the groove of the upper mold and the pressure ring 3411 abuts against the edge of the upper mold. The suction nozzle 3412 picks up the upper mold and moves upward, separating the upper and lower molds. At this time, even if the position of the upper mold is offset at the peeling assembly, the upper end face of the upper mold will be automatically adjusted to a horizontal state when the edge of the upper end face of the upper mold abuts against the lower end face of the pressure ring 3411. It should be noted that the suction nozzle 3412 first abuts against the upper mold downward, and then continues downward until the lower end face of the pressure ring 3411 abuts against the upper end face of the upper mold. After that, the suction nozzle 3412 applies negative pressure to pick up the upper mold, so as to ensure that the upper mold can automatically adjust its posture when it is picked up.

[0062] S3. Liquid Injection Process. After the upper and lower molds separate, the lower mold moves with the positioning carrier plate 31 to the liquid injection assembly 33. The injection needle 331 moves downward to the lower mold, and the lower mold resets after liquid injection. If leakage occurs, the return funnel below can be used for recovery.

[0063] S4. The upper and lower molds close. After injection, the lower mold moves again with the positioning carrier plate 31 to below the pressing assembly 341. The pressing assembly 341 moves downward until the upper mold abuts against the lower mold, the suction nozzle 3412 loses pressure, and continues to move downward. The pressure ring 3411 presses against the upper mold, making the upper and lower molds tightly pressed together. The pressed state can be maintained for a certain period of time to maintain pressure.

[0064] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A method of automatically filling a mold for a contact lens, comprising: For an automatic filling and mold closing mechanism, the automatic filling and mold closing mechanism includes: a positioning carrier plate and a mold parting assembly, a liquid injection assembly and a mold closing assembly disposed 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 parting assembly, the liquid injection assembly and the mold closing assembly. The mold-separating assembly includes multiple sets of peeling claws, each set of peeling claws being symmetrically arranged and able to move closer or further apart from each other; the two peeling claws in each set extend towards each other on their sides to form a wedge-shaped protrusion, and a first inclined surface and a second inclined surface are formed above and below the extension direction of the protrusion, respectively; during peeling, the two peeling claws move closer to each other, and the protrusion is inserted between the upper mold and the lower mold. The mold-closing assembly includes multiple pressing components, which are driven by a downward pressing drive device. Each pressing component includes a suction nozzle and a pressure ring connected to the suction nozzle. The pressure ring is fixedly sleeved on the outer ring of the suction nozzle. Before liquid injection, the suction nozzle sucks up the peeled upper mold to separate it. After liquid injection, the pressure ring presses against the upper mold to press against the lower mold. Each pressing component is set independently. During adjustment, a pressure sensor is set directly below each pressing component. When the downward pressing drive device drives all pressing components to press down simultaneously, each pressing component is adjusted according to the pressure value of the pressure sensor, that is, the vertical position of each pressure ring is adjusted so that the force of each pressure ring pressing against the lower mold is consistent. The automatic filling and mold closing method is as follows: S1. The upper and lower molds are peeled off. The peeling claws move downwards until their bottoms touch the plane where the upper edge of the material groove is located. Each set of peeling claws moves towards each other. While the upper and lower molds are still assembled, they press the upper and lower molds upwards and downwards respectively to complete the peeling. S2. The upper and lower molds separate. The pressing assembly moves downward until the suction nozzle abuts against the upper mold and the pressure ring abuts against the edge of the upper mold. The suction nozzle picks up the upper mold and separates the upper and lower molds. S3, Liquid injection process: The injection needle moves downward to the lower mold, and the lower mold is reset after liquid injection. S4. The upper and lower molds close together. 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.

2. A method of automatically filling a mold for a contact lens as defined in claim 1, wherein: The multiple sets of peeling claws are arranged in a circular pattern, and the line connecting the two peeling claws in each set passes through the center of the circle where the multiple sets of peeling claws are arranged in a circular pattern.

3. A method of automatically filling a mold for a contact lens as defined in claim 2, wherein: The positioning carrier plate is provided with a material groove, the mold is placed in the material groove, and the upper end face of the lower mold is not lower than the plane where the upper edge of the material groove is located; during peeling, the lower end face of the peeling claw abuts against the plane where the upper end face of the material groove is located.

4. A method of automatically filling a mold for a contact lens as defined in claim 3, wherein: The bottom of the material groove is through-hole; a first positioning component is provided directly below the mold splitting component. During peeling, the first transfer device drives the positioning plate to move directly above the first positioning component, and the first suction cup component at the first positioning component moves upward and sucks up the lower mold of the mold in the material groove.

5. A method of automatically filling a mold for a contact lens as defined in claim 4, wherein: The injection assembly includes multiple 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 directly below the injection assembly.

6. A method of automatically filling a mold for a contact lens as defined in claim 5, wherein: The mold assembly comprises a mounting plate, and the upper end of the compression ring is connected with the mounting plate and can be adjusted in the vertical direction.

7. A method of automatically filling a mold for a contact lens as defined in claim 6, wherein: A second positioning assembly is arranged below the compression assembly, when compression, the first transfer device drives the positioning plate to move to the upper of the second positioning assembly, the second suction disc assembly at the second positioning assembly moves upward and sucks the lower mold in the mold tray.

8. The method of claim 1, wherein the method further comprises: When the upper and lower molds are stripped, the protrusions move towards each other and are inserted between the upper and lower molds, and the first and second inclined surfaces press the upper and lower molds upward and downward, respectively.

9. An automatic filling and molding apparatus for applying the automatic filling and molding method of any one of claims 1 to 8, characterized in that, The tray transfer mechanism, the transfer mechanism and the mold unloading mechanism are provided. The tray transfer mechanism comprises a tray feeding assembly and a tray unloading assembly. The transfer mechanism comprises a mechanical arm, and the mechanical arm is connected with a third suction disc assembly and a fourth suction disc assembly; the mechanical arm drives the third suction disc assembly to pick up the tray at the tray feeding assembly and transfer to the transfer table at the transfer mechanism; then the fourth suction disc assembly is driven to pick up the mold at the transfer table and transfer to the positioning plate; after the mold is filled and compressed, the fourth suction disc assembly picks up the mold and transfers to the mold unloading mechanism; the mechanical arm drives the third suction disc assembly to pick up the empty tray on the transfer table and transfer to the tray unloading assembly.

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