A color contact lens automatic production line and method thereof

Abstract

The present invention relates to an automatic production line for colored contact lenses and a method thereof. The production method comprises the following processes: upper mold injection molding, lower mold injection molding, upper mold shearing, lower mold shearing, upper mold arrangement, lower mold arrangement, lower mold color printing, lower mold liquid injection, upper and lower mold pressing, molding, upper and lower mold separation, lens demoulding, hydration tray loading, hydration, extraction, cleaning, soaking, and rough inspection. The production line has a reasonable layout and a compact structure, which can effectively save site area; the various equipments in the production line are smoothly connected, which reduces unnecessary turnover and can effectively realize the fully automated production of colored contact lenses; the production line can achieve large-volume production and improve production efficiency.

Description

Technical field:

[0001] The present invention relates to the technical field of production and manufacturing of contact lenses, and further to an automatic production line for colored contact lenses and a method thereof. Background technology:

[0002] With the vigorous development of the contact lens industry, the production process of contact lenses has been constantly updated and upgraded, from the traditional turning molding process to the later centrifugal molding and compression molding methods. In addition to selecting appropriate production processes, major manufacturers will also upgrade their equipment. The purpose is often to improve the degree of automation of equipment in each process and to achieve automated production between each process.

[0003] The production process of colored contact lenses varies according to the different processes. However, no matter which process is used, there are multiple processes in the production process, which mainly include: color printing, molding, turning, separation, extraction, packaging, etc. Each of these processes requires the use of specific equipment to achieve. Some of the equipment used in these processes is bulky and expensive, and the degree of automation of the corresponding equipment in each process is also different. Therefore, it is not easy to realize the automated production of colored contact lenses. In addition to considering the connection between the equipment in each process, the planning of the site and the placement of the equipment must also be considered. In this case, it is necessary to provide a colored contact lens production process and a corresponding fully automatic production line that can organically connect the various production processes to achieve fully automated production of colored contact lenses. Summary of the invention:

[0004] The purpose of the present invention is to provide a colored contact lens production process and a fully automatic production line suitable for the process, aiming to achieve fully automated production of colored contact lenses. The specific technical solution is as follows:

[0005] An automatic production line for colored contact lenses, the production line comprises: an upper mold injection molding machine 1, a lower mold injection molding machine 2, a first manipulator 3 is arranged next to the upper mold injection molding machine, the first manipulator is used to clamp the upper molds connected together after injection molding from the upper mold injection molding machine, a second manipulator 4 is also arranged next to the lower mold injection molding machine, the second manipulator is used to clamp the lower molds connected together after injection molding from the lower mold injection molding machine; an upper mold shearing plate 5 is opposite to the first manipulator, an upper mold transfer device 7 is arranged between the first manipulator and the upper mold shearing plate, a lower mold shearing plate 6 is opposite to the second manipulator, a lower mold transfer device 8 is arranged between the second manipulator and the lower mold shearing plate; the upper mold shearing plate The upper mold channel 9 is connected to the lower mold channel 10, and a first baffle 11 and a first sensor 13 are arranged at the connection. The lower mold shearing disk is connected to the lower mold channel 10, and a second baffle 12 and a second sensor 14 are arranged at the connection. The upper mold channel is parallel to the lower mold channel. There are 2 to 6 pad printers 26 on the lower mold channel, and each pad printer is provided with 1 to 4 pad printing rubber heads. A first mold return disk 15 is arranged at the end of the upper mold channel, and a second mold return disk 16 is arranged at the end of the lower mold channel. There is a first turntable 17 between the end of the upper mold channel and the end of the lower mold channel, and the first turntable is provided with a lower mold feeding station 18, a liquid injection station 19, an upper mold feeding station 20, a pressure station 11, and a pressure station 12. The mold assembly channel 24 is connected to the mold assembly channel 24, and the mold assembly channel is located on the extension line of the lower mold channel. There is a third mold placement disc 25 at the end of the mold assembly channel. The third mold placement disc is connected to the entrance of the molding oven 22. The serpentine tunnel in the molding oven connects the entrance and exit of the molding oven, and the exit is connected to the fourth mold placement disc 28; the fourth mold placement disc is connected to the second turntable 30 through the first channel, and the fifth mold placement disc 27 is connected to the second turntable through the second channel; the second turntable is provided with a feeding station 29 and a discharging station 31; the fifth mold placement disc 25 is connected to the second turntable 30 through the first channel, and the fifth mold placement disc 27 is connected to the second turntable through the second channel; the second turntable is provided with a feeding station 29 and a discharging station 31; the fifth mold placement disc 25 is connected to the second turntable 30 through the first channel, and the fifth mold placement disc 25 ... The placement disc is connected to the U-shaped channel 32, a separator 33 is arranged above the U-shaped channel, the end of the U-shaped channel is connected to the first demoulding disc 35, the first demoulding disc is connected to the second demoulding disc 36, a lens retrieval station is arranged on the second demoulding disc, and a lens retrieval device is arranged above the second demoulding disc; a set of disc feeding devices 34 are arranged next to the first demoulding disc and the second demoulding disc, and stacked lattice discs 37 and stainless steel grid plates 38 are placed on the disc feeding devices; the disc feeding devices cross the entire hydration area 39; there are 4 hydration tanks of the same size and evenly arranged in the hydration area, namely the first hydration tank 40, the second hydration tank 41, the third hydration tank 42, and the fourth hydration tank 43.

[0006] As a preferred solution, it also includes: an inspection platform 44 located at the end of the disk feeding device.

[0007] An automatic production method for colored contact lenses implemented on the above production line comprises the following steps:

[0008] Step 1: Inject the processed raw materials into an upper mold injection molding machine and a lower mold injection molding machine for injection molding respectively, and obtain a plurality of upper molds and a plurality of lower molds connected together after the injection molding is completed;

[0009] Step 2: clamping the multiple upper molds after injection molding onto the upper mold shearing device through the first manipulator and the upper mold transfer device; clamping the multiple lower molds after injection molding onto the lower mold shearing device through the second manipulator and the lower mold transfer device;

[0010] Step 3: Remove the brackets connecting the multiple upper dies and the brackets connecting the multiple lower dies from the upper die shearing plate and the lower die shearing plate, respectively, to obtain separate upper dies and lower dies;

[0011] Step 4: The upper die and the lower die after the bracket is removed enter the upper die channel and the lower die channel one by one, leading to the next process;

[0012] Step 5: According to the different colors of the patterns to be made, the pigments are weighed and mixed in a standard ratio to make ink. Then, in the color printing process, the pattern on the steel plate is printed into the groove of the lower mold using the pad printing head on the pad printing machine, so that the lower mold has the pattern;

[0013] Step 6: Precisely weigh the raw materials according to the formula designed for different models of products, and prepare the main materials required for the contact lenses, and then inject the main materials into the groove of the lower mold printed with the pattern in the injection process;

[0014] Step 7: Press the upper mold into the lower mold after injection to obtain the mold assembly;

[0015] Step 8: Start the molding oven power supply in advance for preheating, set the temperature control parameters on the oven control panel, and adjust the transmission speed of the mold assembly in the serpentine tunnel to make the oven temperature rise to the set temperature. After the equipment temperature remains stable, the preheating is completed. At this time, the mold assembly is placed in the molding oven for curing and molding;

[0016] Step 9: Place the mold assembly after curing and molding in a separator to separate the upper and lower molds, and at the same time separate the lens from the upper and lower molds, and remove the scraps, leaving only the lens;

[0017] Step 10: Place the lenses one by one in the grids of the lattice plate; cover the lattice plate with the lenses with a stainless steel grid plate;

[0018] Step 11: placing the lattice plate covered with a stainless steel grid plate and the lens in the plate in a hydration tank for hydration, extraction, cleaning and soaking;

[0019] Step 12: After hydration, extraction, cleaning and soaking are completed, the desired contact lens is obtained.

[0020] Preferred solution 1: In step 1, the mold injection process, the air pressure is controlled between 0.4 and 0.6 MPA; in step 5, the pad printing process, the air pressure is controlled between 0.4 and 0.6 MPA.

[0021] Preferred solution two, in step 6, the raw materials before batching are placed in a refrigerator for cold storage, and the purified raw materials taken out of the refrigerator during batching need to be placed at room temperature for 0.5 hours; before injection, the injection volume should be set according to the needs of each model of lens product, and the injection volume is 1.2 to 2 times the weight of the dry lens. When injecting, care should be taken to align the injection head with the lower mold groove and extend the injection tube on the injection head into the groove to avoid generating bubbles and waste of the main lens material.

[0022] Preferred solution three, in step 7, before the upper and lower molds are pressed together, the convex surface of the upper mold and the concave surface of the lower mold should be adjusted to completely correspond, and during the pressing process, care should be taken to control the pressing time and pressure. The preferred pressing time is 8 to 20 seconds, and the preferred pressure is 0.4 to 0.6 MPa.

[0023] Preferred solution four, in step 8, the temperature control parameters of the molding oven are set to 60°C ~ 140°C, and the transmission speed is set to 60 to 120 minutes from the time the molding mold enters the oven to the end of molding; the oven needs to be set with an over-temperature protection temperature, which is generally 10°C higher than the operating temperature. If the actual temperature displayed by the oven exceeds the set temperature by ±5°C, the feeding needs to be stopped.

[0024] Preferred solution five, in step 9, when the upper and lower molds are separated, the lens is first separated from the lower mold and still adheres to the convex surface of the upper mold. After the lens is separated from the upper mold, it is convenient to transfer the lens to the lattice plate.

[0025] Preferred embodiment six, the hydration process of the lens in step 11 needs to pass through 4 hydration tanks, wherein the first hydration tank is filled with purified water, and its function is to hydrate the obtained dry contact lens; the second hydration tank is filled with an extraction solution, and its function is to extract, that is, to remove the unpolymerized monomers in the lens material, and the hydration tank is also provided with a heating device, the purpose of which is to heat the extraction solution to 50-100°C, thereby helping to accelerate the extraction process and effectively remove possible toxic substances; the third hydration tank is filled with purified water, and its function is to clean the residual extraction solution, and the hydration tank is also provided with an automatic water changing device, the purpose of which is to thoroughly clean the lens; the fourth hydration tank is filled with a preservation solution for contact lenses, and its function is to soak the lenses to stabilize the water content and size of the lenses, which is convenient for subsequent inspection. Furthermore, the first hydration tank: the hydration time of the lens should be no less than 60 minutes; the second hydration tank: the extraction should start from when the hydration tank reaches the set temperature, and the extraction time should be no less than 60 minutes; the third hydration tank: the cleaning time should be no less than 60 minutes; the fourth hydration tank: the immersion time of the lens should be no less than 15 minutes; the lattice disks in the hydration tank are stacked layer by layer, and the number of layers does not exceed 15.

[0026] The beneficial effects of the present invention over the prior art are as follows: the sequence of the processes in the production process described in the present invention is reasonably arranged and can be effectively connected to realize the fully automated production of colored contact lenses; the processes in the production process described in the present invention are easily controlled and can effectively control the quality of the product; the processes in the production process described in the present invention are all automated production, which can effectively reduce labor costs; the production line described in the present invention has a reasonable layout and a compact structure, which can effectively save site area; the equipment in the production line described in the present invention is smoothly connected to each other, which reduces unnecessary turnover and can effectively realize the fully automated production of colored contact lenses; the production line described in the present invention can achieve large-volume production and improve production efficiency. Description of the drawings:

[0027] Figure 1The present invention is a schematic diagram of the structure of an automatic production line for colored contact lenses; in the figure, 1 represents an upper mold injection molding machine, 2 represents a lower mold injection molding machine, 3 represents a first manipulator, 4 represents a second manipulator, 5 represents an upper mold shearing disk, 6 represents a lower mold shearing disk, 7 represents an upper mold transfer device, 8 represents a lower mold transfer device, 9 represents an upper mold channel, 10 represents a lower mold channel, 11 represents a first baffle, 12 represents a second baffle, 13 represents a first sensor, 14 represents a second sensor, 15 represents a first mold placement disc, 16 represents a second mold placement disc, 17 represents a first turntable, 18 represents a lower mold feeding station, 19 represents a liquid injection station, 20 represents an upper mold feeding station, 21 represents a pressing station, station, 22 represents a molding oven, 24 represents a mold assembly channel, 25 represents the third mold placement disc, 26 represents a pad printing machine, 27 represents the fifth mold placement disc, 28 represents the fourth mold placement disc, 29 represents the feeding station of the second turntable, 30 represents the second turntable, 31 represents the unloading station of the second turntable, 32 represents a U-shaped channel, 33 represents a separator, 34 represents a disc feeding device, 35 represents the first demolding disc, 36 represents the second demolding disc, 37 represents a lattice disc, 38 represents a stainless steel grid plate, 39 represents a hydration area, 40 represents the first hydration tank, 41 represents the second hydration tank, 42 ​​represents the third hydration tank, 43 represents the fourth hydration tank, and 44 represents an inspection platform.

[0028] Figure 2 It is a schematic diagram of the structure of the upper mold or the lower mold connected together after injection molding of the present invention. Specific implementation method:

[0029] Example:

[0030] An automatic production line for colored contact lenses, the production line comprises: an upper mold injection molding machine 1, a lower mold injection molding machine 2, a first manipulator 3 is arranged next to the upper mold injection molding machine, the first manipulator is used to clamp the upper molds connected together after injection molding from the upper mold injection molding machine, and a second manipulator 4 is also arranged next to the lower mold injection molding machine, the second manipulator is used to clamp the lower molds connected together after injection molding from the lower mold injection molding machine; an upper mold shearing plate 5 is opposite to the first manipulator, an upper mold transfer device 7 is arranged between the first manipulator and the upper mold shearing plate, a lower mold shearing plate 6 is opposite to the second manipulator, and a lower mold transfer device 8 is arranged between the second manipulator and the lower mold shearing plate; the upper mold shearing plate is connected to The upper mold channel 9 has a first baffle 11 and a first sensor 13 at the connection, the lower mold shearing plate is connected to the lower mold channel 10, and has a second baffle 12 and a second sensor 14 at the connection; the upper mold channel and the lower mold channel are parallel; 2 to 6 pad printers 26 are arranged on the lower mold channel, and each pad printer is provided with 1 to 4 pad printing rubber heads; a first mold return disk 15 is arranged at the end of the upper mold channel, and a second mold return disk 16 is arranged at the end of the lower mold channel; a first turntable 17 is arranged between the end of the upper mold channel and the end of the lower mold channel, and the first turntable is provided with a lower mold feeding station 18, a liquid injection station 19, an upper mold feeding station 20, a pressing station 21 and a discharge station in sequence The second mold placement disc is connected to the mold assembly channel 24, and the mold assembly channel is located on the extension line of the lower mold channel. There is a third mold placement disc 25 at the end of the mold assembly channel. The third mold placement disc is connected to the entrance of the molding oven 22. The serpentine tunnel in the molding oven connects the entrance and exit of the molding oven, and the exit is connected to the fourth mold placement disc 28; the fourth mold placement disc is connected to the second turntable 30 through the first channel, and the fifth mold placement disc 27 is connected to the second turntable through the second channel; the second turntable is provided with a feeding station 29 and a discharging station 31; the fifth mold placement disc is connected to the U-shaped channel 32 The U-shaped channel is connected, a separator 33 is arranged above the U-shaped channel, the end of the U-shaped channel is connected to the first demoulding tray 35, the first demoulding tray is connected to the second demoulding tray 36, a lens retrieval station is arranged on the second demoulding tray, and a lens retrieval device is arranged above the second demoulding tray; a set of tray feeding devices 34 are arranged next to the first demoulding tray and the second demoulding tray, and stacked lattice trays 37 and stainless steel grid plates 38 are placed on the tray feeding devices; the tray feeding devices cross the entire hydration area 39; four hydration tanks of the same size and evenly arranged are arranged in the hydration area, namely the first hydration tank 40, the second hydration tank 41, the third hydration tank 42, and the fourth hydration tank 43; an inspection platform 44 is arranged at the end of the tray feeding device.

[0031] The upper mold injection molding machine and the lower mold injection molding machine are respectively provided with a heating system and a cooling system, the heating system is used for injection molding the mold, and the cooling system is used for rapidly cooling the mold;

[0032] The upper die shearing plate and the lower die shearing plate can not only remove the brackets connecting the multiple upper dies and the multiple lower dies, but also arrange the upper dies and the lower dies, so that the upper dies and the lower dies enter the upper die channel and the lower die channel one by one respectively;

[0033] When the first sensor senses that there is no upper die at the entrance of the upper die channel, the first baffle opens to allow the upper die to enter the channel in sequence.

[0034] When the second sensor senses that there is no lower die at the entrance of the lower die channel, the second baffle opens to allow the lower die to enter the channel in sequence.

[0035] The second mold placement disc, when the lower mold enters the lower mold feeding station of the first turntable through the disc, the second mold placement disc rotates clockwise; when the mold assembly enters the mold assembly channel from the discharge station through the disc, the second mold placement disc rotates counterclockwise;

[0036] The first turntable rotates counterclockwise, and the first turntable intermittently rotates from one station to the next station at an angle of 90 degrees, and each station can accommodate 1 to 4 molds at the same time;

[0037] The interior of the molding oven is a serpentine tunnel, and the width of the tunnel can accommodate up to 4 mold assemblies side by side;

[0038] The second turntable rotates clockwise, and the second turntable intermittently rotates from one station to the next station at an angle of 90 degrees, and each station can accommodate 1 to 4 molds at the same time;

[0039] The separator is used to separate the upper mold from the lower mold and remove the lower mold at the same time; the first demoulding plate is used to remove the scraps; and the second demoulding plate is used to separate the upper mold from the lens.

[0040] An automatic production method for colored contact lenses implemented on the above production line comprises the following steps:

[0041] Step 1: Inject the processed raw materials into the upper mold injection molding machine and the lower mold injection molding machine for injection molding respectively, and obtain multiple upper molds and multiple lower molds connected together after the injection molding; the air pressure is controlled between 0.4 and 0.6 MPA;

[0042] Step 2: clamping the multiple upper molds after injection molding onto the upper mold shearing device through the first manipulator and the upper mold transfer device; clamping the multiple lower molds after injection molding onto the lower mold shearing device through the second manipulator and the lower mold transfer device;

[0043] Step 3: Remove the brackets connecting the multiple upper dies and the brackets connecting the multiple lower dies from the upper die shearing plate and the lower die shearing plate, respectively, to obtain separate upper dies and lower dies;

[0044] Step 4: The upper die and the lower die after the bracket is removed enter the upper die channel and the lower die channel one by one, leading to the next process;

[0045] Step 5: In advance, pigments are weighed and mixed according to the standard ratio according to the different colors of the patterns to be made, and then the patterns on the steel plate are printed into the grooves of the lower mold using the pad printing head on the pad printing machine in the color printing process, so that the lower mold has patterns; in the pad printing process of step 5, the air pressure is controlled between 0.4 and 0.6 MPA;

[0046] Step 6: weigh the raw materials accurately in advance according to the formula designed for different models of products, and prepare the main materials required for the contact lenses, and then inject the main materials into the groove of the lower mold printed with patterns in the injection process; the raw materials before mixing are placed in a refrigerator for refrigeration and preservation, and the purified raw materials taken out of the refrigerator during mixing need to be placed at room temperature for 0.5 hours; before injection, the injection volume should be set according to the needs of the lenses of each model of products, and the injection volume is 1.2 to 2 times the weight of the dry lens. When injecting, pay attention to aligning the injection head with the groove of the lower mold, and extend the injection tube on the injection head into the groove, so as to avoid bubbles and waste of the main materials of the lens;

[0047] Step 7: Press the upper mold into the lower mold after the injection is completed to obtain a mold assembly; before the upper and lower molds are pressed together, the convex surface of the upper mold and the concave surface of the lower mold should be adjusted to be completely corresponding, and the pressing time and pressure should be controlled during the pressing process. The preferred pressing time is 8 to 20 seconds, and the preferred pressure is 0.4 to 0.6 MPa;

[0048] Step 8: Start the power of the molding oven in advance for preheating, set the temperature control parameters on the oven control panel, and adjust the transmission speed of the mold assembly in the serpentine tunnel to make the oven temperature rise to the set temperature. After the equipment temperature remains stable, the preheating is completed. At this time, place the mold assembly in the molding oven for curing molding; the temperature control parameters of the molding oven are set to 60℃~140℃, and the transmission speed is set to 60~120min from the time the molding mold enters the oven to the end of molding; the oven needs to be set with an over-temperature protection temperature, which is generally 10℃ higher than the operating temperature. If the actual displayed temperature of the oven exceeds the set temperature by ±5℃, the feeding needs to be stopped;

[0049] Step 9: Place the mold assembly after curing and molding in a separator to separate the upper and lower molds, and at the same time separate the lens from the upper and lower molds, and remove the scraps, leaving only the lens; the mold assembly after coming out of the molding oven has a high temperature and strong flexibility, and the mold will not be damaged when the upper and lower molds are separated; when the upper and lower molds are separated, due to the different materials of the upper and lower molds, the adhesion between the lens and the upper mold is greater than the adhesion between the lens and the lower mold, so after the upper and lower molds are separated, the lens first detaches from the lower mold, but still adheres to the convex surface of the upper mold, and after the lens and the upper mold are separated, it is convenient to transfer the lens to the lattice plate;

[0050] Step 10: Place the lenses one by one in the grids of the lattice plate; cover the lattice plate with the lenses with a stainless steel grid plate;

[0051] Step 11: Place the lattice plate covered with a stainless steel grid plate and the lenses in the plate in a hydration tank for hydration, extraction, cleaning and soaking; the hydration process of the lenses needs to pass through 4 hydration tanks, wherein the first hydration tank is filled with purified water, and its function is to hydrate the obtained dry contact lens; the second hydration tank is filled with an extraction solution, and its function is to extract, that is, to remove unpolymerized monomers in the lens material. The hydration tank is also provided with a heating device, the purpose of which is to heat the extraction solution to 50-100°C, thereby helping to accelerate the extraction process and effectively remove possible toxic substances; the third hydration tank is filled with purified water, and its function is to clean the residual extraction solution. The hydration tank is also equipped with an automatic water changing device, and its purpose is to thoroughly clean the lenses; the fourth hydration tank is filled with a preservation solution for contact lenses, and its function is to soak the lenses to stabilize the water content and size of the lenses, which is convenient for subsequent inspection. Furthermore, the first hydration tank: the hydration time of the lens should be no less than 60 minutes; the second hydration tank: the extraction should start from the time when the hydration tank reaches the set temperature, and the extraction time should be no less than 60 minutes; the third hydration tank: the cleaning time should be no less than 60 minutes; the fourth hydration tank: the immersion time of the lens should be no less than 15 minutes; the lattice disks in the hydration tank are stacked layer by layer, and the number of layers does not exceed 15;

[0052] Step 12: After hydration, extraction, cleaning and soaking are completed, the desired contact lens is obtained.

Claims

1. An automatic production line for colored contact lenses, characterized in that: The production line comprises: an upper mold injection molding machine (1), a lower mold injection molding machine (2), a first manipulator (3) is arranged next to the upper mold injection molding machine, the first manipulator is used to clamp the upper molds connected together after injection molding from the upper mold injection molding machine, and a second manipulator (4) is also arranged next to the lower mold injection molding machine, the second manipulator is used to clamp the lower molds connected together after injection molding from the lower mold injection molding machine; an upper mold shearing plate (5) is opposite to the first manipulator, an upper mold transfer device (7) is arranged between the first manipulator and the upper mold shearing plate, a lower mold shearing plate (6) is opposite to the second manipulator, and a lower mold transfer device (8) is arranged between the second manipulator and the lower mold shearing plate; the upper mold shearing plate is connected to the upper mold channel (9), and the connection is There is a first baffle (11) and a first sensor (13); the lower die shearing disc is connected to the lower die channel (10); a second baffle (12) and a second sensor (14) are provided at the connection; the upper die channel and the lower die channel are parallel; 2 to 6 pad printers (26) are provided on the lower die channel, and each pad printer is provided with 1 to 4 pad printing rubber heads; a first die return disk (15) is provided at the end of the upper die channel, and a second die return disk (16) is provided at the end of the lower die channel; a first turntable (17) is provided between the end of the upper die channel and the end of the lower die channel, and the first turntable is provided with a lower die feeding station (18), a liquid injection station (19), an upper die feeding station (20), and a pressing station (21) in sequence. and a discharging station, wherein the lower die feeding station and the discharging station overlap; the second die placement disc is connected to the die assembly channel (24), the die assembly channel is located on the extension line of the lower die channel, and a third die placement disc (25) is provided at the end of the die assembly channel, the third die placement disc is connected to the entrance of the molding oven (22), a serpentine tunnel in the molding oven connects the entrance and the exit of the molding oven, and the exit is connected to the fourth die placement disc (28); the fourth die placement disc is connected to the second turntable (30) through the first channel, and the fifth die placement disc (27) is connected to the second turntable through the second channel; the second turntable is provided with a feeding station (29) and a discharging station (31); the fifth die placement disc is connected to The first demoulding tray (35) is connected to the second demoulding tray (36), a separator (33) is arranged above the U-shaped channel, the end of the U-shaped channel is connected to the first demoulding tray (35), the first demoulding tray is connected to the second demoulding tray (36), a lens taking station is arranged on the second demoulding tray, and a lens taking device is arranged above the second demoulding tray; a set of tray delivery devices (34) are arranged beside the first demoulding tray and the second demoulding tray, and lattice trays (37) and stainless steel mesh plates (38) are stacked in layers on the tray delivery devices; the tray delivery devices cross the entire hydration area (39); and four hydration tanks of the same size and evenly arranged are arranged in the hydration area, namely the first hydration tank (40), the second hydration tank (41), the third hydration tank (42), and the fourth hydration tank (43).

2. The automatic production line for colored contact lenses according to claim 1, characterized in that: Also includes: A testing platform (44) is located at the end of the tray delivery device.

3. A method for automatically producing colored contact lenses implemented on the production line described in claim 1, characterized in that: The process is: Step 1: Inject the processed raw materials into an upper mold injection molding machine and a lower mold injection molding machine for injection molding respectively, and obtain a plurality of upper molds and a plurality of lower molds connected together after the injection molding is completed; Step 2: clamping the multiple upper molds after injection molding onto the upper mold shearing device through the first manipulator and the upper mold transfer device; clamping the multiple lower molds after injection molding onto the lower mold shearing device through the second manipulator and the lower mold transfer device; Step 3: Remove the brackets connecting the multiple upper dies and the brackets connecting the multiple lower dies from the upper die shearing plate and the lower die shearing plate, respectively, to obtain separate upper dies and lower dies; Step 4: The upper die and the lower die after the bracket is removed enter the upper die channel and the lower die channel one by one, leading to the next process; Step 5: According to the different colors of the patterns to be made, the pigments are weighed and mixed in a standard ratio to make ink. Then, in the color printing process, the pattern on the steel plate is printed into the groove of the lower mold using the pad printing head on the pad printing machine, so that the lower mold has the pattern; Step 6: Precisely weigh the raw materials according to the formula designed for different models of products, and prepare the main materials required for the contact lenses, and then inject the main materials into the groove of the lower mold printed with the pattern in the injection process; Step 7: Press the upper mold into the lower mold after injection to obtain the mold assembly; Step 8: Start the molding oven power supply in advance for preheating, set the temperature control parameters on the oven control panel, and adjust the transmission speed of the mold assembly in the serpentine tunnel to make the oven temperature rise to the set temperature. After the equipment temperature remains stable, the preheating is completed. At this time, the mold assembly is placed in the molding oven for curing and molding; Step 9: Place the mold assembly that has been cured and molded in a separator to separate the upper and lower molds, and at the same time separate the lens from the upper and lower molds, remove the scraps, and only leave the lens; Step 10: Place the lenses one by one in the grids of the lattice plate; cover the lattice plate with the lenses with a stainless steel grid plate; Step 11: placing the lattice plate covered with a stainless steel grid plate and the lens in the plate in a hydration tank for hydration, extraction, cleaning and soaking; Step 12: After hydration, extraction, cleaning and soaking are completed, the desired contact lens is obtained.

4. The method for automatically producing colored contact lenses according to claim 3, characterized in that: In step 1, the mold injection process, the air pressure is controlled between 0.4 and 0.6 MPA; in step 5, the pad printing process, the air pressure is controlled between 0.4 and 0.6 MPA.

5. The method for automatically producing colored contact lenses according to claim 3, characterized in that: In the step 6, the raw materials before batching are placed in a refrigerator for cold storage. When batching, the purified raw materials taken out of the refrigerator need to be placed at room temperature for 0.5 hours. Before injection, the injection amount should be set according to the needs of each model of lens product, and the injection amount is 1.2 to 2 times the weight of the dry lens. When injecting, pay attention to aligning the injection head with the lower mold groove and extending the injection tube on the injection head into the groove to avoid generating bubbles and waste of the main lens material.

6. The method for automatically producing colored contact lenses according to claim 3, characterized in that: In step 7, before the upper and lower molds are pressed together, the convex surface of the upper mold and the concave surface of the lower mold should be adjusted to completely correspond, and during the pressing process, care should be taken to control the pressing time and pressure. The pressing time is 8 to 20 seconds and the pressure is 0.4 to 0.6 MPa.

7. The method for automatically producing colored contact lenses according to claim 3, characterized in that: In step 8, the temperature control parameters of the molding oven are set to 60°C to 140°C, and the transmission speed is set to 60 to 120 minutes from the time the molding mold enters the oven to the end of molding. The oven needs to be set with an over-temperature protection temperature, which is 10°C higher than the operating temperature. If the actual displayed temperature of the oven exceeds the set temperature by ±5°C, the feeding needs to be stopped.

8. The method for automatically producing colored contact lenses according to claim 3, characterized in that: In step 9, when the upper and lower molds are separated, the lens is first separated from the lower mold and still adheres to the convex surface of the upper mold. After the lens is separated from the upper mold, it is convenient to transfer the lens to the lattice plate.

9. The method for automatically producing colored contact lenses according to claim 3, characterized in that: The hydration process of the lens in step 11 needs to pass through 4 hydration tanks, wherein the first hydration tank is filled with purified water, and its function is to hydrate the obtained dry contact lens; the second hydration tank is filled with an extraction solution, and its function is to extract, that is, to remove the unpolymerized monomers in the lens material. The hydration tank is also provided with a heating device, and its purpose is to heat the extraction solution to 50-100°C, thereby helping to accelerate the extraction process and effectively remove possible toxic substances; the third hydration tank is filled with purified water, and its function is to clean the residual extraction solution. The hydration tank is also provided with an automatic water changing device, and its purpose is to thoroughly clean the lens; the fourth hydration tank is filled with a preservation solution for contact lenses, and its function is to soak the lenses to stabilize the water content and size of the lenses, which is convenient for subsequent inspection.

10. The method for automatically producing colored contact lenses according to claim 9, characterized in that: First hydration tank: the hydration time of the lens should be no less than 60 minutes; Second hydration tank: the extraction time should start from when the hydration tank reaches the set temperature, and the extraction time should be no less than 60 minutes; Third hydration tank: the cleaning time should be no less than 60 minutes; Fourth hydration tank: the immersion time of the lens should be no less than 15 minutes; the lattice disks in the hydration tank are stacked layer by layer, and the number of layers shall not exceed 15.

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