Packaging method for recycling contact lens shell film and contact lens product

Abstract

The invention provides a packaging method for recycling a contact lens shell film and a contact lens product, the contact lens shell film comprises a female shell film and a male shell film, the female shell film or the male shell film is a support type shell film, the female shell film is provided with a lower concave cavity, the male shell film is provided with a lower convex mold wall, and the male shell film and the female shell film are overlapped up and down. A lens cavity is formed between the lower male die wall and the lower concave cavity, a support shell film in the male shell film and the female shell film is reserved, the support shell film is placed in a compression molding device to be subjected to hot compression molding flaring, and a containing cup is formed on the support shell film; the buffer solution is injected into the containing cup, then the lens is placed in the buffer solution of the containing cup, the opening of the containing cup is packaged with a protective film, sterilization and packaging are conducted on the whole, and a complete contact lens product is completed. According to the invention, the shell film not only can effectively realize the molding of the lens, but also can be recycled in the packaging process through simple reprocessing. Therefore, not only is waste reduced, but also the production cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of contact lens packaging, and particularly relates to a packaging method for recycling contact lens shell membranes and a contact lens product. Background Art

[0002] Soft contact lens lenses are usually formed by injecting glue and curing in male and female shell membranes. Due to the extremely high precision requirements of the lenses, the shell membranes are disposable consumables. If one wants to reuse the discarded shell membranes, the traditional waste recycling method is to crush the used shell membranes into powders, and then use other processes such as thermoplastic molding, compression molding, or injection molding to mold the powders into other items. This recycling process is relatively cumbersome, and the dust generated during the process needs to be removed through dust removal facilities, resulting in relatively high reprocessing costs.

[0003] For example, Chinese Patent Document No. 202280089919.5 discloses an airtight sealed blister package for contact lenses. The blister package includes a base member (100) made of a plastic material and a sealing member (103) joined to the base member to form a blister cavity arranged to hold an unworn contact lens and a contact lens packaging solution. The base member (100) has an upper surface (130) and a lower surface (132) and includes a blister well (104) and a handle (106). The blister well (104) has a periphery (101). The blister well (104) is enclosed by a sealing area (102) on the upper surface (130) of the base member (100). The handle (106) and the sealing area (102) are provided by flanges extending from the blister well (104). The base member (100) has a weight of 0.72 g or less.

[0004] In the above technical solution, although the materials and structure of the airtight sealed blister package for contact lenses are disclosed, it is not directly made by improving the shell membrane, so the direct recycling of the discarded shell membrane cannot be achieved, the packaging process of contact lenses cannot be simplified, and the packaging cost cannot be reduced. Summary of the Invention

[0005] The object of the present invention is to address the above problems existing in the prior art and propose a packaging method for recycling contact lens shell membranes and a contact lens product.

[0006] A packaging method for recycling contact lens shell membranes, the contact lens shell membranes include a female shell membrane and a male shell membrane, the female shell membrane or the male shell membrane is a support-type shell membrane, the female shell membrane has a concave cavity, the male shell membrane has a convex mold wall, the male shell membrane and the female shell membrane are stacked up and down, and a lens cavity is formed between the convex mold wall and the concave cavity. The packaging method for recycling contact lens shell membranes includes the following steps: S1. Place the female shell film below, keep the opening of the lower concave cavity facing upward, inject glue into the lower concave cavity of the female shell film, then stack the male shell film on the female shell film for mold closing, so that the colloid solidifies and forms a shape in the lens cavity; S2. Open the male shell film and take out the shaped lens for the hydration process; S3. Retain the support shell film in the male shell film and the female shell film, put the support shell film into the compression molding device for hot compression molding and flaring, so that a receiving cup is formed on the support shell film; S4. Inject the buffer solution into the receiving cup, then place the lens in the buffer solution in the receiving cup, seal the protective film on the opening of the receiving cup, and perform sterilization and packaging as a whole to complete the complete product of the contact lens.

[0007] In the above packaging method for the reuse of the contact lens shell film, when the female shell film is a support shell film, the female shell film has a support platform, the support platform is recessed downward from the top surface to form the lower concave cavity, a sealing convex edge is arranged around the top surface of the support platform for the lower concave cavity, and a support stand is arranged on the bottom surface of the support platform; the male shell film is a matching shell film, a closed edge is arranged around the circumference of the lower convex die wall, and the lower convex die wall is embedded in the lower concave cavity, so that the closed edge presses and seals the sealing convex edge to form a mold closing seal.

[0008] In the above packaging method for the reuse of the contact lens shell film, when the male shell film is a support shell film, the male shell film has a support platform, the support platform is recessed downward from the top surface to form the lower convex die wall, a sealing convex edge is arranged around the top surface of the support platform for the lower convex die wall, a closed part is arranged around the bottom surface of the support platform for the lower convex die wall, and a support stand is arranged on the bottom surface of the support platform; the female shell film is a matching shell film, a flat edge is arranged around the circumference of the lower concave cavity, legs are arranged downward on the outer periphery of the flat edge, and the lower convex die wall is embedded in the lower concave cavity, so that the closed part presses and seals the flat edge to form a mold closing seal.

[0009] In the above packaging method for the reuse of the contact lens shell film, the compression molding device includes an upper mold and a lower mold that cooperate up and down. The top surface of the lower mold is recessed with a flaring female mold core, a pushing mechanism is arranged below the flaring female mold core on the lower mold, the bottom surface of the upper mold is convex with a flaring male mold core, a heating block is arranged above the flaring male mold core on the upper mold, and the flaring male mold core and the flaring female mold core are closed up and down to form a receiving cup mold cavity.

[0010] In the above packaging method for the reuse of the contact lens shell film, a downward inclined positioning surface is arranged on the top surface of the lower mold, an upward inclined positioning surface is arranged on the top surface of the upper mold, and the upward inclined positioning surface presses and fits the downward inclined positioning surface to form a positioning fit.

[0011] In the above packaging method for the reuse of contact lens shell membranes, a positioning groove is recessed on the top surface of the lower mold.

[0012] In the above packaging method for the reuse of contact lens shell membranes, the pushing mechanism includes a lifting cylinder. The lifting cylinder has an upward telescopic rod. A flat plate is fixedly arranged at the top end of the telescopic rod. At least two pushing rods are erected on the flat plate. At least two pushing holes are correspondingly opened at the bottom of the flaring female mold core. The pushing rods correspondingly pass through the pushing holes to form a sliding connection.

[0013] In the above packaging method for the reuse of contact lens shell membranes, the hot compression molding and flaring steps of the compression molding device are as follows: A1. Place the bracket-type shell membrane on the flaring female mold core of the lower mold. A part of the supporting upright frame is attached to the downward-inclined positioning surface, and the other part of the supporting upright frame is inserted into the positioning groove to form a fixation. A2. Drive the upper mold to descend while heating the heating block. The flaring male mold core and the flaring female mold core are closed, and the spherical shell part of the bracket-type shell membrane is heated for hot compression molding and flaring. A3. Enlarge the radius of the spherical shell on the bracket-type shell membrane to form a receiving cup. Drive the upper mold to lift to release the bracket-type shell membrane. The lifting cylinder drives the flat plate and the pushing rods to rise, so that the pushing rods pass through the pushing holes and enter the flaring female mold core, and gradually push out the bracket-type shell membrane.

[0014] In the above packaging method for the reuse of contact lens shell membranes, the protective film is specifically an aluminum foil composite film. The aluminum foil composite film forms a close connection with the sealing convex edge, and the aluminum foil composite film covers the entire top surface of the bracket-type shell membrane.

[0015] A contact lens product includes a packaging container. A lens is soaked in a buffer solution in the packaging container. The packaging container is placed in a packaging box. The contact lens product is completed by the above packaging method for the reuse of contact lens shell membranes.

[0016] Compared with the prior art, the packaging method for the reuse of contact lens shell membranes and the contact lens product have the following beneficial effects: 1. Reuse and saving of resources: The present invention adopts a method for the reuse of contact lens shell membranes. Through steps such as closing the female shell membrane and the male shell membrane and hot compression flaring, the shell membrane can not only effectively realize the molding of the lens, but also be recycled during the packaging process through simple reprocessing. In this way, both waste is reduced and production costs are saved.

[0017] 2. Improvement of product stability and protection: The closed receiving cup design and the use of an aluminum foil composite film as a protective film can further ensure the stability of the contact lens and prevent contamination or damage, achieving a good packaging effect.

[0018] 3. Improve production efficiency and operability: Through the hot compression and flaring operation of the compression molding device, the entire packaging process can efficiently complete the forming and encapsulation of the shell film. During this process, with the assistance of precise mold positioning, heating control, and the feeding mechanism, the operation accuracy and consistency can be improved, thus enhancing production efficiency.

[0019] 4. Effective sealing and safety: During the packaging process, especially when using aluminum foil composite film for encapsulation, a highly sealed space can be formed, which not only prevents the influence of the external environment on the lens (such as humidity, air pollution, etc.), but also improves the safety of the contact lens product, ensuring that it is not contaminated by the outside during transportation and storage.

[0020] 5. Energy conservation and environmental protection: Through reasonable material use and production process design, resource waste is reduced, the recycling of waste materials is improved, and through the reasonable design of the encapsulation process, the negative impact on the environment can be minimized, such as reducing the consumption of packaging materials and energy conservation and emission reduction.

[0021] Generally speaking, the packaging method for the reuse of contact lens shell film not only realizes the direct improvement and utilization of waste materials, but also improves production efficiency, reduces costs, and enhances the safety, stability, and user experience of the product, with significant economic and technical advantages. Brief Description of the Drawings

[0022] Figure 1 It is a mold closing structure diagram of the male shell film and the female shell film in the first embodiment of the present invention.

[0023] Figure 2 It is a mold closing structure diagram of the male shell film and the female shell film in the second embodiment of the present invention.

[0024] Figure 3 It is a structure diagram of the compression molding device in the present invention.

[0025] Figure 4 It is a structure diagram of the bracket-type shell film in the present invention.

[0026] Figure 5 It is a structure diagram of the packaging formed by the female shell film as a bracket-type shell film in the first embodiment of the present invention.

[0027] Figure 6 It is a structure diagram of the packaging formed by the male shell film as a bracket-type shell film in the second embodiment of the present invention.

[0028] In the figure, 1 is the female shell film; 1a is the concave cavity; 2 is the male shell film; 2a is the convex die wall; 3 is the sealing convex edge; 4 is the closing edge; 5 is the closing part; 6 is the flat edge; 7 is the leg; 8 is the support shell film; 8a is the support platform; 8b is the inclined plate; 8c is the vertical plate; 8d is the receiving cup; 9 is the upper mold; 9a is the upward inclined positioning surface; 10 is the flared male mold core; 11 is the heating block; 12 is the lower mold; 12a is the downward inclined positioning surface; 12b is the positioning groove; 13 is the flared female mold core; 14 is the telescopic rod; 15 is the flat plate; 16 is the pushing rod; 17 is the aluminum foil composite film. Detailed implementation manners

[0029] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0030] Embodiment 1

[0031] As Figure 1 、 3 Shown in FIGS. 1 to 5, the packaging method for reusing the contact lens shell film, the contact lens shell film includes a female shell film 1 and a male shell film 2, either the female shell film 1 or the male shell film 2 is a support shell film 8, the female shell film 1 has a concave cavity 1a, the male shell film 2 has a convex die wall 2a, the male shell film 2 and the female shell film 1 are stacked up and down, and a lens cavity is formed between the convex die wall 2a and the concave cavity 1a. The packaging method for reusing the contact lens shell film includes the following steps: S1. Place the female shell film 1 below and keep the opening of the concave cavity 1a facing upward, inject glue into the concave cavity 1a of the female shell film 1, and then stack the male shell film 2 on the female shell film 1 for mold closing, so that the glue is cured and formed in the lens cavity; S2. Open the male shell film 2 and take out the shaped lens for the hydration process; The contact lens hydration process refers to the process of soaking the made contact lens in a solution and assisted by heating to make it fully absorb water and become a soft contact lens suitable for human eyes to wear. This process belongs to the prior art, so it will not be described in detail here.

[0032] S3. Keep the support shell film 8 in the male shell film 2 and the female shell film 1, put the support shell film 8 into a compression molding device for hot compression molding and flaring, so that a receiving cup 8d is formed on the support shell film 8; S4. Inject the buffer solution into the receiving cup 8d, then place the lens in the buffer solution in the receiving cup 8d, seal a protective film on the opening of the receiving cup 8d, and perform sterilization and packaging as a whole to complete the complete contact lens product.

[0033] Preferably, when the female shell film 1 is the support type shell film 8, the female shell film 1 has a support platform 8a. The support platform 8a is recessed downward from the top surface to form a concave cavity 1a. A sealing convex edge 3 is arranged around the top surface of the support platform 8a for the concave cavity 1a, and support brackets are arranged on the bottom surface of the support platform 8a. The male shell film 2 is a matching type shell film. A closed edge 4 is arranged around the circumference of the lower convex die wall 2a. The lower convex die wall 2a is embedded into the concave cavity 1a, so that the closed edge 4 is pressed against the sealing convex edge 3 to form a mold closing seal.

[0034] The concave cavity 1a of the female shell film 1 is a spherical structure, and the top surface of the concave cavity 1a is the bottom surface of the lens cavity. The lower convex die wall 2a of the male shell film 2 is a spherical structure, and the bottom surface of the lower convex die wall 2a is the top surface of the lens cavity. Relatively speaking, the concave cavity 1a has a large curvature and a small radius, while the lower convex die wall 2a has a small curvature and a large radius. After mold closing, a hemispherical gap is formed between the two, thereby determining the shape of the contact lens.

[0035] As Figure 3 shown, preferably, the compression molding device includes an upper mold 9 and a lower mold 12 that cooperate up and down. The top surface of the lower mold 12 is recessed to form a flared female mold core 13. The lower mold 12 is provided with a pushing mechanism below the flared female mold core 13. The bottom surface of the upper mold 9 is convexly provided with a flared male mold core 10. The upper mold 9 is provided with a heating block 11 above the flared male mold core 10. The flared male mold core 10 and the flared female mold core 13 are closed up and down to form a receiving cup mold cavity.

[0036] Place the support type shell film 8 on the flared female mold core 13 for fixation. Lower the upper mold 9 so that the flared male mold core 10 presses against the support type shell film 8. At the same time, heat through the heating block 11 to thermoplastically flare the spherical shell structure of the support type shell film 8 into a receiving cup 8d structure. Lift the upper mold 9 and start the pushing mechanism to push up the support type shell film 8.

[0037] Preferably, the top surface of the lower mold 12 is provided with a downward inclined positioning surface 12a, and the top surface of the upper mold 9 is provided with an upward inclined positioning surface 9a. The upward inclined positioning surface 9a presses against the downward inclined positioning surface 12a to form a positioning fit. The support bracket of the support type shell film 8 includes an inclined plate 8b on one side. Place the support type shell film 8 on the flared female mold core 13. The lower surface of the inclined plate 8b fits against the downward inclined positioning surface 12a. After the upper mold 9 is pressed, the upward inclined positioning surface 9a fits against the upper surface of the inclined plate 8b, thereby clamping and fixing the inclined plate 8b.

[0038] Preferably, a positioning groove 12b is recessed on the top surface of the lower mold 12. The support bracket of the support type shell film 8 includes at least one vertical plate 8c. Place the support type shell film 8 on the flared female mold core 13, and the vertical plate 8c is correspondingly inserted into the positioning groove 12b to form a fixation.

[0039] Preferably, the pushing mechanism includes a lifting cylinder which has an upward telescopic rod 14. A flat plate 15 is fixedly arranged at the top end of the telescopic rod 14. At least two pushing rods 16 are erected on the flat plate 15. At least two pushing holes are correspondingly opened at the bottom of the flaring female mold core 13. The pushing rods 16 are correspondingly inserted through the pushing holes to form a sliding connection.

[0040] A telescopic cavity is arranged inside the lower mold 12. The telescopic rod 14, the flat plate 15 and the pushing rods 16 are arranged in the telescopic cavity. The lifting stroke of the telescopic rod 14 and the flat plate 15 is provided by the telescopic cavity. When hot compression molding operation is carried out, the lifting cylinder drives the flat plate 15 and the pushing rods 16 to descend, so that the pushing rods 16 are located below the flaring female mold core 13. When demolding operation is needed, the lifting cylinder drives the flat plate 15 and the pushing rods 16 to rise, so that the pushing rods 16 enter the flaring female mold core 13 to eject the support shell film 8.

[0041] As Figure 3 shown, preferably, the hot compression molding and flaring steps of the compression molding device are as follows: A1. Place the support shell film 8 on the flaring female mold core 13 of the lower mold 12. A part of the support stand is attached to the downward inclined positioning surface 12a, and another part of the support stand is inserted into the positioning groove 12b to form a fixation; A2. Drive the upper mold 9 to descend and heat the heating block 11 at the same time. The flaring male mold core 10 and the flaring female mold core 13 are closed, and the spherical shell part of the support shell film 8 is heated to carry out hot compression molding and flaring; A3. Expand the spherical shell radius on the support shell film 8 to form a receiving cup 8d. Drive the upper mold 9 to lift to release the support shell film 8. The lifting cylinder drives the flat plate 15 and the pushing rods 16 to rise, so that the pushing rods 16 pass through the pushing holes and enter the flaring female mold core 13, and gradually eject the support shell film 8.

[0042] As Figure 5 and 6 shown, preferably, the protective film specifically adopts an aluminum foil composite film 17. The aluminum foil composite film 17 forms a close connection with the sealing convex edge 3. The aluminum foil composite film 17 covers the entire top surface of the support shell film 8. The aluminum foil composite film 17 is heat-sealed on the sealing convex edge 3, so as to form a sealed internal space for the receiving cup 8d to realize the preservation of the lens. By covering the rest of the top surface of the support shell film 8 with the aluminum foil composite film 17, both the aesthetic effect can be achieved and the peelable force-applying part can be provided by the extra film length.

[0043] Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, and the difference lies in: As Figure 2 and 6As shown, preferably, when the male shell film 2 is a stent-type shell film 8, the male shell film 2 has a support platform 8a. The support platform 8a is recessed downward from the top surface to form a downward convex die wall 2a. A sealing convex edge 3 is arranged around the top surface of the support platform 8a along the downward convex die wall 2a. A closed portion 5 is arranged around the bottom surface of the support platform 8a along the downward convex die wall 2a. A support stand is arranged on the bottom surface of the support platform 8a. The female shell film 1 is a matching-type shell film. A flat edge 6 is arranged around the periphery of the downward concave cavity 1a. Legs 7 are arranged downward on the outer periphery of the flat edge 6. The downward convex die wall 2a is embedded into the downward concave cavity 1a, so that the closed portion 5 is pressed against the flat edge 6 to form a mold closing seal.

[0045] The downward concave cavity 1a of the female shell film 1 is a spherical structure, and the top surface of the downward concave cavity 1a is the bottom surface of the lens cavity. The downward convex die wall 2a of the male shell film 2 is a spherical structure, and the bottom surface of the downward convex die wall 2a is the top surface of the lens cavity. Relatively speaking, the downward concave cavity 1a has a large curvature and a small radius, and the downward convex die wall 2a has a small curvature and a large radius. After mold closing, a hemispherical gap is formed between the two, thereby determining the shape of the contact lens.

[0046] Embodiment 3

[0047] Based on Embodiments 1 and 2, the difference points of this embodiment are: As Figures 1 to 6 As shown, a contact lens product includes a packaging container. The lens is soaked in a buffer solution in the packaging container. The packaging container is placed in a packaging box. The contact lens product is completed by the above packaging method for recycling the contact lens shell film.

[0048] Based on the fact that the raw material components of the accommodation cup are the same as those of the shell film, and the shape of the accommodation cup is similar to that of the shell film. By developing a set of male and female shell film molds with a specific shape, after the lens is made, the shell film does not need to be discarded. After inspecting that the shape and specifications of the shell film are intact, based on the original shape of the shell film, a simple flaring process is carried out to convert the waste shell film into a storage container, and all performance indicators meet the use requirements. Further, it participates in the packaging of contact lenses, avoiding the waste and treatment cost of discarded shell films, reducing the packaging cost, simplifying the packaging production process, improving the packaging efficiency, and conforming to the environmental protection concept.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention has been described in detail in the accompanying drawings and the foregoing description, such description is considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, those of ordinary skill in the art may make changes and modifications. Specifically, the present invention encompasses additional embodiments having any combination of features from the different embodiments described above. With respect to the use of the expressions "generally" or "substantially", this patent application should be understood to disclose that the same fully meets these features and values, i.e., without the foregoing being characterized as "generally" or "substantially".

[0050] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

Claims

1. A packaging method for reusing contact lens shell membranes, the contact lens shell membranes comprising a female shell membrane (1) and a male shell membrane (2), the female shell membrane (1) or the male shell membrane (2) being a bracket-type shell membrane (8), the female shell membrane (1) having a concave cavity (1a), the male shell membrane (2) having a lower convex mold wall (2a), the male shell membrane (2) and the female shell membrane (1) being superimposed on each other, a lens cavity being formed between the lower convex mold wall (2a) and the concave cavity (1a), the packaging method for reusing contact lens shell membranes being characterized in that: The following steps are involved: S1, placing the female shell film (1) at the bottom and keeping the opening of the concave cavity (1a) facing upward, injecting glue into the concave cavity (1a) of the female shell film (1), and then stacking the male shell film (2) on the female shell film (1) to close the mold, so that the colloid is solidified in the lens cavity; S2, opening the male shell membrane (2), taking out the shaped lens and performing a hydration process; S3, retaining the bracket-shaped shell membrane (8) in the male shell membrane (2) and the female shell membrane (1), placing the bracket-shaped shell membrane (8) in a compression molding device for hot compression molding and expansion, so that a receiving cup (8d) is formed on the bracket-shaped shell membrane (8); S4, injecting the buffer solution into the receiving cup (8d), then placing the lens in the buffer solution of the receiving cup (8d), sealing the open mouth of the receiving cup (8d) with a protective film, sterilizing and packaging the whole, and completing the contact lens product.

2. The packaging method for reusing contact lens shell membranes according to claim 1, wherein: When the female shell membrane (1) is a bracket-type shell membrane (8), the female shell membrane (1) has a support platform (8a), the support platform (8a) is recessed downward from the top surface to form the concave cavity (1a), the top surface of the support platform (8a) is provided with a sealing convex edge (3) around the concave cavity (1a), and a support stand is provided on the bottom surface of the support platform (8a); the male shell membrane (2) is a matching shell membrane, the circumference of the lower convex mold wall (2a) is provided with a closed edge (4), and the lower convex mold wall (2a) is embedded in the concave cavity (1a), so that the closed edge (4) is pressed against the sealing convex edge (3) to form a mold seal.

3. The packaging method for reusing contact lens shell membranes according to claim 1, wherein: When the male shell membrane (2) is a bracket-type shell membrane (8), the male shell membrane (2) has a support platform (8a), the support platform (8a) is recessed downward from the top surface to form the lower punch wall (2a), the top surface of the support platform (8a) is provided with a sealing convex edge (3) around the lower punch wall (2a), the bottom surface of the support platform (8a) is provided with a closing portion (5) around the lower punch wall (2a), and a supporting stand is provided on the bottom surface of the support platform (8a); the female shell membrane (1) is a matching shell membrane, the circumference of the concave cavity (1a) is provided with a flat edge (6), the outer periphery of the flat edge (6) is provided with a supporting leg (7) downward, and the lower punch wall (2a) is embedded in the concave cavity (1a), so that the closing portion (5) is pressed against the flat edge (6) to form a mold seal.

4. The packaging method for reusing contact lens shell membranes according to claim 1, wherein: The compression molding device comprises an upper mold (9) and a lower mold (12) that cooperate with each other. The top surface of the lower mold (12) is concavely provided with an expanded female mold core (13). The lower mold (12) is provided with a material pushing mechanism below the expanded female mold core (13). The bottom surface of the upper mold (9) is convexly provided with an expanded male mold core (10). The upper mold (9) is provided with a heating block (11) above the expanded male mold core (10). The expanded male mold core (10) and the expanded female mold core (13) are combined with each other to form a cavity for accommodating a cup (8d).

5. The packaging method for reusing contact lens shell films according to claim 4, characterized in that: The top surface of the lower mold (12) is provided with a downwardly inclined positioning surface (12a), and the top surface of the upper mold (9) is provided with an upwardly inclined positioning surface (9a), and the upwardly inclined positioning surface (9a) is pressed against the downwardly inclined positioning surface (12a) to form a positioning fit.

6. The packaging method for reusing contact lens shell films according to claim 5, characterized in that: A positioning groove (12b) is concavely formed on the top surface of the lower mold (12).

7. The packaging method for reusing contact lens shell films according to claim 6, wherein: The push mechanism comprises a lifting cylinder, the lifting cylinder having an upward telescopic rod (14), a flat plate (15) being fixedly arranged at the top of the telescopic rod (14), at least two push rods (16) being erected on the flat plate (15), at least two push holes being correspondingly opened at the bottom of the expanded female mold core (13), and the push rods (16) correspondingly penetrate the push holes to form a sliding connection.

8. The packaging method for reusing contact lens shell membranes according to claim 7, characterized in that: The hot compression molding and expanding steps of the compression molding device are as follows: A1. Place the bracket-shaped shell membrane (8) on the expanded female mold core (13) of the lower mold (12), with a portion of the support frame attached to the downwardly inclined positioning surface (12a), and another portion of the support frame inserted into the positioning groove (12b) to be fixed; A2, driving the upper mold (9) downward and simultaneously heating the heating block (11), closing the expanding male mold core (10) with the expanding female mold core (13), heating the spherical shell part of the bracket-shaped shell film (8) to perform hot pressing and expanding; A3. The radius of the spherical shell is enlarged on the bracket-shaped shell membrane (8) to form a receiving cup (8d), and the upper mold (9) is driven to lift and release the bracket-shaped shell membrane (8). The lifting cylinder drives the plate (15) and the push rod (16) to rise, so that the push rod (16) passes through the push hole and enters the expanded female mold core (13), and gradually pushes out the bracket-shaped shell membrane (8).

9. The packaging method for reusing contact lens shell films according to claim 2 or 3, characterized in that: The protective film specifically adopts an aluminum foil composite film (17), the aluminum foil composite film (17) is closely connected with the sealing convex edge (3), and the aluminum foil composite film (17) covers the entire top surface of the bracket-type shell film (8).

10. A contact lens product, comprising a packaging container, wherein the lenses are soaked in a buffer solution in the packaging container, and the packaging container is placed in a packaging box, characterized in that: The contact lens product is prepared by the packaging method for reusing the contact lens shell membrane as described in any one of claims 1 to 9.

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