Liquid injection and mold closing method and system for contact lens astigmatism sheet

Abstract

The invention relates to the technical field of contact lens automatic production, in particular to a liquid injection and mold closing method and system for a contact lens astigmatism lens. A turnover unit drives a lower mold carrier to be subjected to liquid injection to perform turnover transmission; the liquid injection unit injects a liquid material into the unloaded lower mold in the lower mold carrier to complete the liquid injection action; after the adjusting and mold closing unit picks up the upper mold, the upper mold is adjusted to be matched and aligned with the lower mold, and the aligned upper mold is placed in the liquid-injected lower mold; the aligned upper die is pressed in the lower die by the die closing unit; according to the liquid injection and mold closing method for the contact lens astigmatism piece, the processes of alignment and mold closing of the astigmatism piece, liquid injection of the lower mold and compression of the upper mold and the lower mold are integrated, multi-process operation is integrated, redundant turnover is reduced, and the processing efficiency of the astigmatism piece is improved; the time, manpower and equipment site cost caused by independent equipment for die assembly of the light diffusing sheet is reduced, and the processing efficiency and quality of the contact lenses are integrally improved.

Description

Technical Field

[0001] The invention relates to the technical field of automated production of contact lenses, in particular to a liquid injection and mold closing method and system for contact lens astigmatism lenses. Background Art

[0002] Astigmatism is a manifestation of abnormal refraction of the eye. When parallel light enters the eye, it cannot be focused on one point due to the different refractive powers of the eyeball on different meridians, resulting in the inability to form a clear image. The compression molding method is a contact lens molding process. In the existing compression molding method for preparing contact lenses, liquid materials such as high molecular polymers are often used in a mold with upper and lower molds.

[0003] Due to the complex surface of astigmatism contact lenses, one of the most important processes in the preparation of astigmatism contact lenses is the positioning of the mold angle, because only by keeping the astigmatism axis stable can the astigmatism be corrected. However, the existing positioning method of astigmatism contact lenses is not perfect enough, and the astigmatism contact lenses produced often cannot achieve a good correction effect. Summary of the invention

[0004] The object of the present invention is to provide a method and system for liquid injection and mold closing of a contact lens toric lens capable of automatic turnover, liquid injection, alignment adjustment and mold pressing and closing.

[0005] To achieve the above object, the present invention provides the following technical solutions.

[0006] A method for injecting and closing a mold for a contact lens astigmatism lens comprises a carrier turnover unit for rotating a lower mold carrier, an injection unit, a mold adjustment unit and a mold clamping unit are arranged along a turnover path of the carrier turnover unit; the specific steps are as follows:

[0007] S10. The turnover unit drives the lower mold carrier equipped with the lower mold to be injected to the injection unit;

[0008] S20. The injection unit injects liquid into the empty lower mold in the lower mold carrier; the turnover unit drives the lower mold carrier carrying the lower mold after injection to the adjustment clamping unit;

[0009] S30. Adjust the mold clamping unit to pick up the upper mold, adjust the upper mold to match the lower mold to be molded, and place the upper mold in the lower mold after injection;

[0010] S40. The turnover unit drives the matched upper mold and lower mold to the mold clamping unit; the mold clamping unit presses the upper mold and the lower mold together to complete the mold clamping.

[0011] Furthermore, a lower mold loading unit is provided at the feeding end of the turnover unit, and a tray moving unit for carrying the lower mold carrier is provided at the feeding end and the discharging end of the turnover unit;

[0012] In step S10, it also includes:

[0013] S11. The lower mold loading unit moves the lower mold carrier equipped with the lower mold to be injected to the feeding end of the turnover unit;

[0014] S12. The tray moving unit is used to move the lower mold carrier equipped with the lower mold to be injected from the discharge end of the lower mold loading unit to the turnover unit.

[0015] Furthermore, the tray moving unit includes a tray moving tool, a tray moving lifting drive device for driving the tray moving tool to lift and lower, and a tray moving linear drive device for driving the tray moving tool to move;

[0016] The tray linear drive device drives the tray lifting drive device to move between the lower die loading unit, the turnover unit and the lower die carrier unloading position; the tray lifting drive device drives the tray lifting tooling to grab and place the lower die carrier;

[0017] The lower mold loading unit includes a lower mold conveying device for moving the lower mold carrier equipped with the lower mold to be injected to the turnover unit and a dust removal device for removing dust from the moving lower mold carrier.

[0018] Furthermore, the liquid injection unit includes a liquid storage tank for storing liquid material and a liquid injection device for injecting the liquid material into the lower mold.

[0019] Further, the mold adjustment unit includes a pick-up adjustment mechanism, a mold drive mechanism for driving the pick-up adjustment mechanism to move, an upper mold recognition mechanism for acquiring a marking point of the upper mold, and a lower mold recognition mechanism for acquiring a marking point of the lower mold;

[0020] In step S30, it also includes:

[0021] S31. The upper mold recognition mechanism and the lower mold recognition mechanism obtain the marking points of the upper mold and the lower mold respectively;

[0022] S32. The picking and adjusting mechanism picks up and adjusts the upper mold so that the marking point of the upper mold matches the marking point of the lower mold;

[0023] S33. The mold clamping drive mechanism drives the pickup adjustment mechanism with the upper mold and moves the upper mold to the lower mold;

[0024] S34. The mold closing drive mechanism drives the picking-up adjustment mechanism to align the upper mold and place it in the lower mold to complete the mold closing.

[0025] Furthermore, the feeding position of the adjusting clamping unit is also provided with an upper die feeding unit and a temporary storage mechanism; the upper die feeding unit includes an upper die feeding device and an upper die transport mechanism;

[0026] In step S31, it also includes:

[0027] S311. The upper mold feeding device transports the tray containing the upper mold to the upper mold transport mechanism;

[0028] S312. The upper mold to be molded is transported to the temporary storage mechanism by the upper mold transport mechanism;

[0029] S313. The upper mold recognition mechanism identifies and obtains the marking point of the upper mold at the temporary storage mechanism; the lower mold recognition mechanism identifies and obtains the marking point of the lower mold after the lower mold carrier is filled;

[0030] Furthermore, the temporary storage mechanism includes a mold storage frame for placing the upper mold, the mold storage frame is connected to a dust removal chamber for collecting and distributing clean gas, the dust removal chamber is connected to an air amplifier, and the air amplifier is connected to an external clean gas source;

[0031] When the upper mold is located at the mold storage frame and has not been placed, the air amplifier is connected to the external clean air source, and the dust removal chamber collects and distributes the clean gas and then guides the gas to blow the upper mold above the mold storage frame. After dust removal, the upper mold is placed on the mold storage frame.

[0032] Furthermore, the mold closing drive mechanism includes a mold closing translation drive device and a mold closing lifting drive device;

[0033] The mold clamping lifting drive device is drivingly connected to the execution end of the mold clamping translation drive device; the execution end of the mold clamping lifting drive device is drivingly connected to a mold clamping frame plate for installing a picking adjustment mechanism.

[0034] Further, the pickup adjustment mechanism includes a pickup actuator, an adjustment drive device, and a drive mounting frame;

[0035] The adjustment drive device is installed in the drive mounting frame, and the adjustment drive device drives the picking actuator to rotate forward or reverse until the marking point of the upper mold matches the marking point of the lower mold; the picking actuator is used to pick up and place the upper mold to be closed.

[0036] Furthermore, a plurality of the adjustment drive devices are mounted on a drive mounting frame, and a reset sensor is mounted on the side of each of the adjustment drive devices; one end of the output shaft of the adjustment drive device is connected to the pickup actuator, and the other end is mounted with a reset trigger sheet;

[0037] When the adjustment drive device drives the pickup actuator to reset, the pickup actuator rotates coaxially with the reset trigger piece, and the reset sensor determines that the pickup actuator has returned to the initial position through the signal triggered by the reset trigger piece, thereby completing the reset.

[0038] Furthermore, the mold clamping unit includes a pressing assembly, a pressing lifting drive device for driving the pressing assembly to lift and lower, and a pressing linear drive device for driving the pressing assembly to move; the pressing linear drive device drives the pressing lifting drive device to move and then drives the pressing assembly to the mold to be pressed, and the pressing lifting drive device makes the pressing assembly contact and press the upper mold to be pressed, and clamps the upper mold and the lower mold after liquid injection.

[0039] Furthermore, the pressing assembly includes a pressing frame plate drivingly connected to the execution end of the pressing lifting drive device, a pressing block mounting plate movably mounted on the pressing frame plate, and a plurality of clamping standard blocks movably mounted on the pressing block mounting plate.

[0040] Furthermore, an auxiliary bracket is also provided on the turnover unit, and the injection unit, the mold adjustment unit, the mold clamping unit and the plate moving unit are all installed within the turnover range of the turnover unit through the auxiliary bracket.

[0041] A liquid injection and mold clamping system for a contact lens toric lens is used to implement the above-mentioned liquid injection and mold clamping method for a contact lens toric lens, comprising a carrier turnover unit for rotating a lower mold carrier, a liquid injection unit for injecting liquid into the lower mold along the turnover path of the carrier turnover unit, an adjustment and mold clamping unit for adjusting the upper mold to make it cooperate with the lower mold alignment mold, and a mold clamping clamping unit.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] In actual use, the turnover unit drives the lower mold carrier to be injected with liquid for turnover transmission, thereby improving the turnover efficiency; the injection unit injects liquid material into the empty lower mold in the lower mold carrier to complete the automated and standardized injection action, thereby improving the efficiency and quality of injection; after adjusting the clamping unit to pick up the upper mold, the upper mold is adjusted to match the lower mold, and the aligned upper mold is placed in the lower mold after injection, thereby realizing rapid mold matching and reducing the risk of manual clamping operation; the clamping unit presses the aligned upper mold into the lower mold.

[0044] The liquid injection and mold closing method for the astigmatism lens of the contact lens integrates the processes of the astigmatism lens alignment mold closing, the lower mold liquid injection, and the upper and lower mold pressing, integrates multi-process operations, reduces redundant turnover, and improves the processing efficiency of the astigmatism lens; reduces the time, manpower, and equipment and site costs caused by setting up independent equipment for the astigmatism lens mold closing, and improves the processing efficiency and quality of the contact lens as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic top view of the overall structure of the present invention;

[0046] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0047] Figure 3 A schematic diagram of another viewing angle of the overall structure of the present invention;

[0048] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0049] Figure 5 It is a schematic diagram of the structure of adjusting the clamping unit in the present invention;

[0050] Figure 6 A side view schematic diagram of adjusting the clamping unit in the present invention;

[0051] Figure 7 It is a schematic diagram of the three-dimensional structure of adjusting the clamping unit in the present invention;

[0052] Figure 8 for Figure 7 A partial enlarged schematic diagram in the middle. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0054] refer to Figure 1-8 As shown, a method for injecting and closing a mold for a contact lens astigmatism lens comprises a carrier turnover unit 200 for rotating a lower mold carrier 210, an injection unit 300, a mold adjustment unit 400 and a mold clamping unit 500 are arranged along the turnover path of the carrier turnover unit 200; the specific steps are as follows:

[0055] S10. The turnover unit 200 drives the lower mold carrier 210 equipped with the lower mold to be injected to the injection unit 300;

[0056] S20. The injection unit 300 injects liquid into the unloaded lower mold in the lower mold carrier 210; the turnover unit 200 drives the lower mold carrier 210 carrying the lower mold after injection to adjust the clamping unit 400;

[0057] S30. Adjust the mold clamping unit 300 to pick up the upper mold, adjust the upper mold to match the lower mold to be molded, and place the upper mold in the lower mold after injection;

[0058] S40. The turnover unit 200 drives the matched upper mold and lower mold to the mold clamping unit 500; the mold clamping unit 500 presses the upper mold and the lower mold together to complete the mold clamping.

[0059] In actual use of the present invention, the turnover unit 200 drives the lower mold carrier 210 to be injected with liquid to perform turnover transmission, thereby improving the turnover efficiency; the injection unit 300 injects liquid material into the empty lower mold in the lower mold carrier 210, thereby completing an automated and standardized injection action, thereby improving the efficiency and quality of injection; after adjusting the clamping unit 400 to pick up the upper mold, the upper mold is adjusted to match the lower mold, and the aligned upper mold is placed in the lower mold after injection, thereby realizing rapid mold matching and reducing the risk of manual clamping operation; the clamping unit 400 presses the aligned upper mold into the lower mold.

[0060] The liquid injection and mold closing method for the astigmatism lens of the contact lens integrates the processes of the astigmatism lens alignment mold closing, the lower mold liquid injection, and the upper and lower mold pressing, integrates multi-process operations, reduces redundant turnover, and improves the processing efficiency of the astigmatism lens; reduces the time, manpower, and equipment and site costs caused by setting up independent equipment for the astigmatism lens mold closing, and improves the processing efficiency and quality of the contact lens as a whole.

[0061] In this embodiment, a lower mold loading unit 100 is provided at the feeding end of the turnover unit 200, and a tray moving unit 600 for carrying the lower mold carrier 210 is provided at the feeding end and the discharging end of the turnover unit 200;

[0062] In step S10, it also includes:

[0063] S11. The lower mold loading unit 100 moves the lower mold carrier 210 equipped with the lower mold to be injected to the feeding end of the turnover unit 200;

[0064] S12. The tray moving unit 600 is used to move the lower mold carrier 600 equipped with the lower mold to be injected from the discharge end of the lower mold loading unit 100 to the turnover unit 200.

[0065] Preferably, the turnover unit 200 can adopt a disc-type turnover device with a circular turnover path, and its feeding end is provided with a lower mold loading unit 100 for providing the lower mold material; and the feeding end and the discharging end of the turnover unit 100 are in overlapping positions, and the disc moving unit 600 is adopted to realize the loading of the lower mold carrier 210 equipped with the lower mold to be injected, and the unloading of the lower mold carrier 210 carrying the mold after mold closing.

[0066] The tray moving unit 600 described in this embodiment includes a tray moving tool 630, a tray moving lifting drive device 620 for driving the tray moving tool to lift and lower, and a tray moving linear drive device 610 for driving the tray moving tool 630 to move; the tray moving linear drive device 610 drives the tray moving lifting drive device 620 to move between the lower mold loading unit 100, the turnover unit 200 and the unloading position of the lower mold carrier 210; the tray moving lifting drive device 620 drives the tray moving tool 630 to lift and lower the lower mold carrier 210 to grab and place it; preferably, the tray moving lifting drive device 620 can adopt a lifting cylinder, the tray moving linear drive device 630 can adopt a linear motor, and the tray moving tool 630 can adopt a suction cup or a clamping claw or other components that can realize tray picking; through reciprocating motion, the upper and lower trays of the lower mold carrier 210 are transported.

[0067] In this embodiment, the lower mold loading unit 100 includes a lower mold conveying device 130 for moving the lower mold carrier 210 equipped with the lower mold to be injected with liquid to the turnover unit 200, and a dust removal device 110 for removing dust from the lower mold carrier 210; preferably, the lower mold conveying device 130 can adopt a material tray conveyor belt, and the dust removal device 110 can adopt an electrostatic dust collector for removing dust from the lower mold carrier 210 transported by the lower mold conveying device 130 and the lower mold placed thereon.

[0068] In this embodiment, the injection unit 300 includes a liquid storage tank 310 for storing liquid materials and an injection device 320 for injecting liquid materials into the lower mold; preferably, the liquid storage tank 310 can adopt a constant temperature insulation tank to ensure the stability of the injected liquid material and improve the quality of injection and subsequent processing; the injection device 320 can adopt a multi-hole injection needle group for injecting liquid materials into the lower mold.

[0069] In this embodiment, the mold adjustment unit 400 includes a pick-up adjustment mechanism 430, a mold drive mechanism 420 that drives the pick-up adjustment mechanism 430 to move, an upper mold recognition mechanism 411 that obtains the marking point of the upper mold, and a lower mold recognition mechanism 412 that obtains the marking point of the lower mold;

[0070] In step S30, it also includes:

[0071] S31. The upper mold recognition mechanism 411 and the lower mold recognition mechanism 412 respectively obtain the marking points of the upper mold and the lower mold;

[0072] S32. The picking and adjusting mechanism 430 picks up and adjusts the upper mold so that the marking point of the upper mold matches the marking point of the lower mold;

[0073] S33. The mold clamping drive mechanism 420 drives the pickup adjustment mechanism 430 with the upper mold and moves the upper mold to the lower mold;

[0074] S34. The mold closing drive mechanism 420 drives the picking adjustment mechanism 430 to align the upper mold and place it in the lower mold to complete the mold closing.

[0075] Specifically, the upper mold recognition mechanism 411 and the lower mold recognition mechanism 412 first obtain the marking points required for the upper mold and the lower mold to be matched and closed, the mold closing drive mechanism 420 drives the picking and adjusting mechanism 430 to pick up the upper mold that needs to be closed and move the lower mold, and then the picking and adjusting mechanism 430 adjusts the upper mold to match the upper mold recognition point with the lower mold recognition point, and then the mold closing drive mechanism 420 drives the picking and adjusting mechanism 430 to move the upper mold to the lower mold, and place the upper mold in the lower mold to complete the mold closing.

[0076] It can realize rapid identification of the identification points of the upper and lower dies, integrate the astigmatism axis matching function of the astigmatism lens with the pick-and-place function, and complete the rapid rotation and alignment of the astigmatism lens for contact lenses without unnecessary turnover and complicated actions, thereby improving the automation of the processing of astigmatism lenses and the production and processing efficiency of contact lenses.

[0077] In this embodiment, the loading position of the adjusting and clamping unit 400 is further provided with an upper mold loading unit 700 and a temporary storage mechanism 440; the upper mold loading unit 700 includes an upper mold feeding device 710 and an upper mold transport mechanism 720;

[0078] In step S31, it also includes:

[0079] S311. The upper mold feeding device 710 transports the tray containing the upper mold to the upper mold transport mechanism 720;

[0080] S312. The upper mold to be molded is transported by the upper mold transport mechanism 720 to the temporary storage mechanism 440;

[0081] S312. The upper mold recognition mechanism 411 recognizes and obtains the marking point of the upper mold at the temporary storage mechanism 440; the lower mold recognition mechanism 412 recognizes and obtains the marking point of the lower mold after liquid injection at the lower mold carrier 210.

[0082] Specifically, the upper mold feeding device 710 can adopt a tray separation device carrying the upper mold, and the upper mold conveying mechanism 720 can adopt a conveying mechanism with an adsorption function to convey the upper material in the upper mold feeding device 710 to the temporary storage mechanism 440 to provide the required upper mold with clamping for adjusting the clamping unit 400.

[0083] In this embodiment, the temporary storage mechanism 440 includes a mold storage frame 441 for placing the upper mold, the mold storage frame 441 is connected to a dust removal chamber 442 for collecting and distributing clean gas, the dust removal chamber 442 is connected to an air amplifier 443, and the air amplifier 443 is connected to an external clean air source; when the upper mold is located at the mold storage frame 441 and is not placed, the air amplifier 443 is connected to the external clean air source, the dust removal chamber 442 collects and distributes the clean gas and then guides the gas to blow the upper mold above the mold storage frame 441, and the upper mold is placed on the mold storage frame after dust removal is completed.

[0084] Among them, the temporary storage mechanism 440 includes a storage mold frame 441, the storage mold frame 441 is connected to a dust removal chamber 442 for collecting and distributing clean gas, the dust removal chamber 442 is connected to an air amplifier 443, and the air amplifier 443 is connected to an external clean gas source; the clean gas can use ion wind with electrostatic dust removal function.

[0085] In this embodiment, the mold closing drive mechanism 420 includes a mold closing translation drive device 421 and a mold closing lifting drive device 422; the mold closing lifting drive device 422 is driven and connected to the execution end of the mold closing translation drive device 421; the execution end of the mold closing lifting drive device 422 is driven and connected to a mold closing frame plate 423 for installing a picking and adjusting mechanism 430.

[0086] Both the mold closing translation drive device 421 and the mold closing lifting drive device 422 can adopt high-precision controlled linear motor modules, which can control the mold closing frame plate 423 to achieve precise positioning and hovering, thereby realizing the driving of the picking adjustment mechanism 430.

[0087] In this embodiment, the picking and adjusting mechanism 430 includes a picking actuator 436, an adjustment drive device 432, and a drive mounting frame 431; the adjustment drive device 432 is installed in the drive mounting frame 431, and the adjustment drive device 432 drives the picking actuator 435 to rotate forward or reverse until the marking point of the upper mold matches the marking point of the lower mold; the picking actuator 436 is used to pick up and place the upper mold to be closed.

[0088] In this embodiment, multiple adjustment drive devices 432 are installed on the drive mounting frame 431, and a reset sensor 434 is installed on the side of each adjustment drive device 432; one end of the output shaft of the adjustment drive device 432 is connected to the pickup actuator 436, and the other end is installed with a reset trigger plate 433; when the adjustment drive device 432 drives the pickup actuator 436 to reset, the pickup actuator 436 rotates coaxially with the reset trigger plate 433, and the reset sensor 434 determines that the pickup actuator 436 has returned to the initial position through the signal triggered by the reset trigger plate 433, thereby completing the reset.

[0089] In this embodiment, the picking actuator 436 adopts a pneumatic suction nozzle, and the adjustment drive device 432 selects a dual-axis encoded stepper motor to achieve synchronous output of the dual axes; a trigger plate is installed on the output shaft at one end to trigger the reset sensor 434. The reset sensor 434 is used to detect whether the picking actuator 436 reaches the initial position when performing the reset action; the output shaft at the other end is used to drive the picking actuator 436 to achieve high-precision rotation, driving the upper mold to rotate until it is aligned with the lower mold; multiple adjustment drive devices 432 are arranged in a matrix as needed, which can meet the adaptability to different types of material trays as needed, realize the rotational clamping operation of multiple molds, complete it in a single time, improve the synchronization rate of each operation, and further improve the efficiency of the rotational clamping operation.

[0090] In this embodiment, the upper mold recognition mechanism 411 is provided with an upper mold light source 413 for filling in the upper mold; the upper mold light source 413 cooperates with the upper mold recognition mechanism 411 to perform auxiliary fill-in lighting for the upper mold, so as to obtain the marking point information of the upper mold more clearly, improve the accuracy of adjusting the mold, and thus improve the overall production and processing efficiency.

[0091] In this embodiment, the mold clamping unit 500 includes a pressing assembly 530, a pressing lifting drive device 520 that drives the pressing assembly 530 to rise and fall, and a pressing linear drive device 510 that drives the pressing assembly 530 to move; the pressing linear drive device 510 drives the pressing lifting drive device 520 to move and then drives the pressing assembly 530 to the mold to be pressed, and the pressing lifting drive device 520 makes the pressing assembly 530 contact and press the upper mold to be pressed, and clamps the upper mold and the lower mold after liquid injection.

[0092] In this embodiment, the pressing assembly 530 includes a pressing frame plate 531 driven and connected to the execution end of the pressing lifting drive device 520, a pressing block mounting plate 532 movably mounted on the pressing frame plate 531, and a plurality of clamping standard blocks 533 movably mounted on the pressing block mounting plate 532; the installation spacing of the plurality of clamping standard blocks 533 is consistent with the mold spacing of the lower mold carrier 210.

[0093] Among them, the pressing mounting plate 532 adopts a detachable movable assembly structure such as bolts or clips, and is movably installed on the pressing frame plate 531; the clamping standard block 532 can adopt a prefabricated standard weight code block; it can realize rapid adjustment corresponding to different lower mold carriers 210 and different models and types of molds, adapt to a variety of production lines, material trays and mold standards, and improve the clamping efficiency of the upper and lower molds and the adjustment and debugging efficiency of the production line.

[0094] In this embodiment, an auxiliary bracket 220 is also provided on the turnover unit 200, and the injection unit 300, the mold adjustment unit 400, the mold clamping unit 500 and the plate moving unit 600 are all installed within the turnover range of the turnover unit 200 through the auxiliary bracket 220.

[0095] A liquid injection and mold clamping system for a contact lens toric lens is used to implement a liquid injection and mold clamping method for a contact lens toric lens, comprising a carrier turnover unit 200 for rotating a lower mold carrier 210, a liquid injection unit 300 for injecting liquid into the lower mold along the turnover path of the carrier turnover unit 200, an adjustment and mold clamping unit 400 for adjusting the upper mold to make it cooperate with the lower mold alignment mold, and a mold clamping clamping unit 500.

[0096] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope defined by the spirit of the present invention.

Claims

1. A method for liquid injection and mold closing of a contact lens astigmatism lens, characterized in that: The invention comprises a carrier turnover unit (200) for rotating a lower mold carrier (210), and a liquid injection unit (300), a mold adjustment unit (400) and a mold clamping unit (500) are arranged along the turnover path of the carrier turnover unit (200); the specific steps are as follows: S10. The turnover unit (200) drives the lower mold carrier (210) equipped with the lower mold to be injected to the injection unit (300); S20. The injection unit (300) injects liquid into the empty lower mold in the lower mold carrier (210); the turnover unit (200) drives the lower mold carrier (210) carrying the lower mold after injection to the adjustment clamping unit (400); S30. Adjust the mold clamping unit (300) to pick up the upper mold, adjust the upper mold to match the lower mold to be molded, and place the upper mold in the lower mold after injection; S40. The turnover unit (200) drives the paired upper mold and lower mold to the mold clamping unit (500); the mold clamping unit (500) presses the upper mold and the lower mold together to complete the mold clamping.

2. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 1, characterized in that: A lower die loading unit (100) is provided at the feeding end of the turnover unit (200), and a tray moving unit (600) for moving the lower die carrier (210) is provided at the feeding end and the discharging end of the turnover unit (200); In step S10, it also includes: S11. The lower mold loading unit (100) moves the lower mold carrier (210) equipped with the lower mold to be injected to the feeding end of the turnover unit (200); S12. The tray moving unit (600) moves the lower mold carrier (600) carrying the lower mold to be injected from the discharge end of the lower mold loading unit (100) to the turnover unit (200).

3. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 2, characterized in that: The tray moving unit (600) comprises a tray moving tool (630), a tray moving lifting drive device (620) for driving the tray moving tool to lift, and a tray moving linear drive device (610) for driving the tray moving tool (630) to move; The tray moving linear drive device (610) drives the tray moving lifting drive device (620) to move between the lower die loading unit (100), the turnover unit (200) and the lower die carrier (210) unloading position; the tray moving lifting drive device (620) drives the tray moving tooling (630) to lift and lower the lower die carrier (210) to grab and place; The lower mold loading unit (100) comprises a lower mold conveying device (130) for moving a lower mold carrier (210) equipped with a lower mold to be injected with liquid to the turnover unit (200) and a dust removal device (110) for removing dust from the lower mold carrier (210).

4. The method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 1, characterized in that: The liquid injection unit (300) comprises a liquid storage tank (310) for storing liquid material and a liquid injection device (320) for injecting the liquid material into the lower mold.

5. The method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 1, characterized in that: The mold adjustment unit (400) comprises a pick-up adjustment mechanism (430), a mold drive mechanism (420) for driving the pick-up adjustment mechanism (430) to move, an upper mold recognition mechanism (411) for acquiring a marking point of the lower mold, and a lower mold recognition mechanism (412) for acquiring a marking point of the lower mold; In step S30, it also includes: S31. The upper mold recognition mechanism (411) and the lower mold recognition mechanism (412) respectively obtain the marking points of the upper mold and the lower mold; S32. The picking and adjusting mechanism (430) picks up and adjusts the upper mold so that the marking point of the upper mold matches the marking point of the lower mold; S33. The mold clamping drive mechanism (420) drives the pick-up adjustment mechanism (430) with the upper mold and moves the upper mold to the lower mold; S34. The mold closing drive mechanism (420) drives the picking adjustment mechanism (430) to align the upper mold and place it in the lower mold to complete the mold closing.

6. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 5, characterized in that: The loading position of the adjusting and clamping unit (400) is also provided with an upper die loading unit (700) and a temporary storage mechanism (440); the upper die loading unit (700) comprises an upper die feeding device (710) and an upper die transport mechanism (720); In step S31, it also includes: S311. The upper mold feeding device (710) transports the material tray carrying the upper mold to the upper mold transport mechanism (720); S312. The upper mold transport mechanism (720) transports the upper mold to be molded to the temporary storage mechanism (440); S312. The upper mold recognition mechanism (411) recognizes and obtains the marking point of the upper mold at the temporary storage mechanism (440); the lower mold recognition mechanism (412) recognizes and obtains the marking point of the lower mold after liquid injection at the lower mold carrier (210).

7. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 5, characterized in that: The temporary storage mechanism (440) comprises a mold storage frame (441) for placing an upper mold, the mold storage frame (441) is connected to a dust removal chamber (442) for collecting and distributing clean gas, the dust removal chamber (442) is connected to an air amplifier (443), and the air amplifier (443) is connected to an external clean gas source; When the upper mold is located at the mold storage frame (441) and has not been placed, the air amplifier (443) is connected to an external clean air source, and the dust removal chamber (442) collects and distributes the clean gas and guides the gas to blow the upper mold above the mold storage frame (441). After the dust removal is completed, the upper mold is placed on the mold storage frame.

8. The method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 5, characterized in that: The mold closing drive mechanism (420) comprises a mold closing translation drive device (421) and a mold closing lifting drive device (422); The mold clamping lifting drive device (422) is drivingly connected to the execution end of the mold clamping translation drive device (421); the execution end of the mold clamping lifting drive device (422) is drivingly connected to a mold clamping frame plate (423) for installing a pickup adjustment mechanism (430).

9. The method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 5, characterized in that: The picking and adjusting mechanism (430) comprises a picking actuator (436), an adjustment driving device (432), and a driving mounting frame (431); The adjustment drive device (432) is installed in the drive mounting frame (431), and the adjustment drive device (432) drives the pick-up actuator (435) to rotate forward or reverse until the marking point of the upper mold matches the marking point of the lower mold; the pick-up actuator (436) is used to pick up and place the upper mold to be closed.

10. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 9, characterized in that: A plurality of the adjustment drive devices (432) are mounted on a drive mounting frame (431), and a reset sensor (434) is mounted on the side of each of the adjustment drive devices (432); one end of the output shaft of the adjustment drive device (432) is connected to a pickup actuator (436), and the other end is mounted with a reset trigger sheet (433); When the adjustment drive device (432) drives the pickup actuator (436) to reset, the pickup actuator (436) rotates coaxially with the reset trigger sheet (433), and the reset sensor (434) determines that the pickup actuator (436) has been restored to the initial position through the signal triggered by the reset trigger sheet (433), thereby completing the reset.

11. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 1, characterized in that: The mold clamping unit (500) comprises a pressing assembly (530), a pressing lifting drive device (520) for driving the pressing assembly (530) to lift and lower, and a pressing linear drive device (510) for driving the pressing assembly (530) to move; The pressing linear drive device (510) drives the pressing lifting drive device (520) to move and then drives the pressing assembly (530) to the mold to be pressed. The pressing lifting drive device (520) makes the pressing assembly (530) contact and press the upper mold to be pressed, and the upper mold is pressed together with the lower mold after liquid injection.

12. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 11, characterized in that: The pressing assembly (530) comprises a pressing frame plate (531) drivingly connected to the execution end of the pressing lifting drive device (520), a pressing block mounting plate (532) movably mounted on the pressing frame plate (531), and a plurality of pressing standard blocks (533) movably mounted on the pressing block mounting plate (532).

13. A method for liquid injection and mold closing of a contact lens astigmatism lens according to claim 2, characterized in that: The turnover unit (200) is also provided with an auxiliary bracket (220), and the injection unit (300), the mold adjustment unit (400), the mold clamping unit (500) and the plate moving unit (600) are all installed within the turnover range of the turnover unit (200) through the auxiliary bracket (220).

14. A liquid injection and mold clamping system for a contact lens astigmatism lens, characterized in that: The method for implementing the liquid injection and mold closing of a contact lens toric sheet as described in any one of claims 1 to 14 comprises a carrier turnover unit (200) for rotating a lower mold carrier (210), a liquid injection unit (300) for injecting liquid into the lower mold arranged along the turnover path of the carrier turnover unit (200), a mold adjustment and mold closing unit (400) for adjusting the upper mold to cooperate with the lower mold alignment mold, and a mold closing and clamping unit (500).

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