Contact lens filling and mold closing device

Abstract

The utility model relates to the technical field of contact lens automatic production, in particular to a contact lens filling and mold closing device which comprises a mold opening and closing unit, a liquid injection unit and a turnover unit, the mold opening and closing unit comprises an upper mold positioning mechanism for limiting the position of the lower mold, a lower mold positioning assembly for limiting the position of the lower mold, and a mold opening mechanism for opening the mold; the liquid injection unit comprises a liquid injection needle group, a needle group module for driving the liquid injection needle group to move to a liquid injection position, a liquid injector assembly for extracting and injecting raw materials, a liquid injection valve group and a constant-temperature bin; according to the utility model, the whole structure is compact, the function integration level is high, and redundant turnover and complex actions are not needed; rapid mold splitting and cover opening can be achieved, and the liquid injection filling action integrating pumping and injection is completed through the liquid injection valve set; the liquid injection needle group is prevented from performing redundant actions, the multi-hole liquid injection filling efficiency is improved, the risk of manual operation is reduced, and the overall production and processing quality of contact lenses is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to contact lens automation production technical field, specifically be a kind of contact lens filling and moulding device. BACKGROUND

[0002] Contact lenses are more and more popular due to their role in vision correction and beautification;

[0003] At present, the molding method is a new contact lens forming process. In the process of preparing contact lenses by the existing molding method, liquid materials such as high molecular polymers are often used; the liquid injection process is an important part of the process of preparing contact lenses by the molding method, and the liquid injection process is also partially automated. However, in conventional automated equipment, the specific actions of the raw materials are also separated by injection and suction. The overall liquid injection operation is complex, prone to failure, and the liquid injection precision is not good. The upper mold and the lower mold are not concentric during the mold closing process, which is not horizontal, resulting in uneven thickness of the lens, affecting the quality of the finished contact lenses. The pressing process is not stable, and the bubbles in the mold are not completely removed, which can cause high bubble rate of the lens and affect the qualification rate of the lens. SUMMARY

[0004] The utility model aims at providing a kind of contact lens filling and moulding device with automatic mold opening and closing, multi-hole synchronization, high function integration and stable operation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.

[0006] A contact lens filling and moulding device includes an opening and closing mold unit, a liquid injection unit, and a turnover unit for transmitting a jig assembly. The opening and closing mold unit includes an upper mold positioning mechanism for positioning the lower mold, a lower mold positioning mechanism for positioning the lower mold, and an opening mechanism for opening the mold. The liquid injection unit includes a liquid injection needle group, a needle group module for driving the liquid injection needle group to move to the liquid injection position, a liquid injection device assembly for extracting and injecting the raw material, a liquid injection valve group for switching the extraction and injection action, and a constant temperature bin for storing the raw material.

[0007] During filling and moulding, the turnover unit (200) transports the jig assembly (300) to the predetermined position, the lower mold positioning mechanism (560) positions the lower mold, the opening mechanism (550) separates the upper mold and the lower mold, and the upper mold positioning mechanism moves the upper mold away from the lower mold. During liquid injection, the liquid injection unit (400) fills the raw material into the mold in the jig assembly (300). During mold closing, the upper mold positioning mechanism moves the upper mold back to the lower mold and places the upper mold in the lower mold. The upper mold positioning mechanism applies pressure to the upper mold to press the upper mold and the lower mold.

[0008] Further, the upper die positioning mechanism comprises a suction nozzle assembly, and an upper die module for driving the suction nozzle assembly to move up and down, wherein the upper die module comprises an upper die lifting drive fixed on an upper die support, and an upper die sliding frame is installed on the execution end of the upper die lifting drive, the upper die sliding frame is slidably installed on the upper die support, and a suction nozzle mounting frame for mounting the suction nozzle assembly is arranged on the bottom of the upper die sliding frame;

[0009] Further, the suction nozzle assembly comprises a plurality of suction nozzle sliding rods slidably installed on the suction nozzle mounting frame, and an upper die suction nozzle is installed at the end of each suction nozzle sliding rod, and a mold closing counterweight is installed on the rod body of each suction nozzle sliding rod.

[0010] Further, the mold opening mechanism comprises at least one mold opening drive, a fork connecting plate installed on the execution end of the mold opening drive, and a mold opening fork installed on the fork connecting plate for inserting the contact lenses;

[0011] Further, the lower die positioning mechanism comprises a lower die positioning suction nozzle arranged below the jig assembly and a lower die positioning drive for driving the lower die positioning suction nozzle to move up and down.

[0012] Further, the liquid injection unit comprises a liquid injection needle group, a needle group module for driving the liquid injection needle group to move to a liquid injection position, a liquid injection valve group, and a constant temperature bin for storing raw materials.

[0013] The liquid injection needle group is connected to the liquid injection valve group through a liquid injection hose, the liquid injection needle group is installed on the execution end of the needle group module, and the needle group module is installed on the side of the liquid injection main frame through a liquid injection side frame.

[0014] After the liquid injection needle group is driven to the liquid injection position by the needle group module, the liquid injection valve group is switched to the liquid injection state, and the liquid injection needle group is filled with raw materials from the constant temperature bin.

[0015] In the embodiment, the needle group module comprises a needle group forward movement drive installed on the liquid injection side frame, a displacement adjustment table installed on the execution end of the needle group forward movement drive, and a needle group downward pressing drive installed on the execution end of the displacement adjustment table, the execution end of the needle group downward pressing drive is provided with a needle group mounting plate, and a plurality of liquid injection needles are installed on the needle group mounting plate to form the liquid injection needle group.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] In actual use, the jig assembly is transported to the liquid filling station by the turnover unit, and the contact lens mold to be filled is placed in the jig assembly; the whole liquid filling is divided into three actions, mold opening, filling and mold closing; during the mold opening action, the lower mold positioning mechanism positions the lower mold, then the mold opening mechanism separates the contact lens upper mold and the lower mold, the upper mold module drives the suction nozzle assembly to descend and adsorb the upper mold, and then rises to open the mold, and waits for liquid filling; during the liquid filling, the liquid filler assembly performs the raw material extraction and liquid filling action; during the liquid extraction action, the liquid valve group is in the liquid extraction mode, and the liquid filler assembly extracts the raw material from the constant temperature bin and temporarily stores it; during the liquid injection action, the liquid valve group switches to the liquid injection mode, the needle group module drives the liquid injection needle group to move above the jig assembly, and the liquid filler assembly pushes the raw material into the liquid injection needle group to complete the liquid filling action; after the liquid injection is completed, the upper mold module drives the suction nozzle assembly to descend and close the mold by using the counterweight designed by itself to complete the mold closing action; during the whole mold opening and filling action, the turnover unit stops moving, and the jig assembly is in a static state; after the mold closing is completed, the turnover unit drives another jig assembly to start the next filling and mold closing work cycle;

[0018] The contact lens filling and mold closing device integrates the mold opening, filling and mold closing actions, has compact overall structure, high function integration degree, and does not need redundant turnover and complex actions; can realize rapid mold opening and cover opening, and the raw material extraction and liquid injection action is realized by the liquid filler assembly, the liquid injection filling action of extraction and injection is completed by the liquid valve group; the liquid injection needle group is avoided to perform redundant actions, the efficiency of multi-hole liquid injection filling is improved, the risk of manual operation is reduced, and the overall production and processing quality of the contact lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 It is a mold opening and closing unit structure schematic view of the utility model;

[0021] Figure 3 It is a local enlarged schematic view of D of the mold opening and closing unit of the utility model;

[0022] Figure 4 It is a mold opening and closing unit structure side view of the utility model;

[0023] Figure 5 It is a local enlarged schematic view of B of the mold opening and closing unit of the utility model;

[0024] Figure 6 It is a local enlarged schematic view of C of the mold opening and closing unit of the utility model;

[0025] Figure 7 It is a liquid injection unit structure schematic view of the utility model;

[0026] Figure 8 It is partial enlarged view of the liquid injection unit A of the utility model;

[0027] Figure 9 It is rear view of the liquid injection unit of the utility model. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0029] Reference Figures 1-9 As shown in the figure, a contact lens filling and molding device comprises an opening and closing mold unit, a liquid injection unit, and a turnover unit for conveying a jig assembly; the opening and closing mold unit 500 comprises an upper mold positioning mechanism for defining the position of a lower mold, a lower mold positioning mechanism 560 for defining the position of the lower mold, and an opening mechanism for opening the mold; the liquid injection unit comprises a liquid injection needle group, a needle group module for driving the liquid injection needle group to move to a liquid injection position, a liquid injection assembly for extracting and injecting raw materials, a liquid injection valve group for switching the extraction and injection actions, and a constant temperature bin for storing raw materials;

[0030] When filling and molding, the turnover unit (200) conveys the jig assembly (300) to a predetermined position, the lower mold positioning mechanism (560) positions the lower mold, and the opening mechanism (200) separates the upper mold and the lower mold, and the upper mold positioning mechanism moves the upper mold away from the lower mold; when injecting liquid, the liquid injection unit (400) fills the raw materials into the mold in the jig assembly (300); when closing the mold, the upper mold positioning mechanism moves the upper mold back to the lower mold, and places the upper mold in the lower mold, and the upper mold positioning mechanism applies pressure to the upper mold to press and close the upper mold and the lower mold.

[0031] In actual use, the jig assembly 300 is conveyed by the turnover unit 200 to the liquid injection filling station, and the contact lens mold to be filled is placed in the jig assembly 300; the overall liquid injection filling is divided into three actions, opening the mold, filling, and closing the mold; when opening the mold, the lower mold positioning mechanism 560 positions the lower mold, and the opening mechanism 550 separates the contact lens upper mold and the lower mold, the upper mold positioning mechanism moves the upper mold away from the lower mold, opens the mold, and waits for liquid injection filling; after the liquid injection is completed, the upper mold positioning mechanism descends and closes the mold by using the counterweight designed by itself, and the closing action is completed; during the whole opening and filling action, the turnover unit 200 stops moving, and the jig assembly 300 is in a stationary state, and after the closing is completed, the turnover unit 200 drives another jig assembly 300 to start the next filling and molding work cycle.

[0032] The present contact lens filling and combining device integrates mold opening, filling and combining actions, has compact overall structure, high function integration degree, and does not need redundant turnover and complex actions; can realize rapid mold opening and cover opening, and the liquid extraction and injection actions of raw materials are realized by the liquid injector assembly, the liquid extraction and injection integrated liquid filling action is completed by the liquid injection valve group; the liquid injection needle group is avoided to perform redundant actions, the efficiency of multi-hole liquid filling is improved, the risk of manual operation is reduced, and the overall production and processing quality of the contact lens is improved.

[0033] The upper mold positioning mechanism in the embodiment includes a suction nozzle assembly 540, and an upper mold module 520 that pushes the suction nozzle assembly 540 to ascend and descend includes an upper mold lifting drive fixed on an upper mold support, and an execution end of the upper mold lifting drive is installed with an upper mold sliding frame that is slidingly installed on the upper mold support and is provided with a suction nozzle mounting frame at the bottom for mounting the suction nozzle assembly;

[0034] A plurality of upper mold modules 520 can be arranged on the upper mold support 510 as needed, the upper mold lifting drive 521 is an electric cylinder module, the upper mold lifting drive 521 can push the upper mold sliding frame 522 to perform lifting movement, and in turn drive the suction nozzle assembly 540 to realize the lifting movement after suction of the upper mold;

[0035] In the embodiment, the suction nozzle assembly 540 includes a plurality of suction nozzle sliding rods 542 slidingly installed on the suction nozzle mounting frame 530, an upper mold suction nozzle 541 is installed at the end of each suction nozzle sliding rod 542, and a mold combining counterweight 543 is installed on the rod body of each suction nozzle sliding rod 542; a plurality of suction nozzle sliding rods 542 are slidingly installed on the suction nozzle mounting frame, the sliding installation mode is adopted to avoid that the descending action in the mold combining process is directly transmitted to the mold, and the risk of damage to the mold is reduced; the bottom of each suction nozzle sliding rod 542 is connected with the upper mold suction nozzle 541, and the weight of the mold combining counterweight 543 corresponding to each upper mold suction nozzle 541 is consistent; the counterweight with reasonable weight can effectively realize the mold combining action and avoid damage to the mold; for different mold combining requirements, only the mold combining counterweight 543 on the suction nozzle sliding rod 542 needs to be replaced.

[0036] In the embodiment, the mold opening mechanism 550 includes at least one mold opening drive 551, a fork connecting plate 552 installed at the execution end of the mold opening drive 551, and a mold opening fork 553 installed on the fork connecting plate 552 for inserting and separating the contact lenses; the mold opening mechanism is located at the side of the liquid filling station, the mold opening drive 551 is a gas cylinder, and each mold opening drive 551 corresponds to a mold on the jig assembly 300; the mold opening drive 551 pushes the fork connecting plate 552 to advance, inserts the mold opening fork 553 into the mold on the jig assembly 300, and since the mold has been positioned by the lower mold positioning mechanism 560, only the upper mold is inserted by the mold opening fork 553 and suspended on the mold opening fork 553, and waits for the suction nozzle assembly 540 to be adsorbed.

[0037] In this embodiment, the lower mold positioning mechanism 560 includes a lower mold positioning suction nozzle 562 arranged below the jig assembly 300 and a lower mold positioning drive 561 for driving the lower mold positioning suction nozzle 562 to move up and down. When the jig assembly 300 enters the working position, the lower mold positioning drive 561 is used to drive the lower mold positioning suction nozzle 562 to move up for adsorption positioning. The lower mold positioning suction nozzle 562 is used to adsorb and fix the lower mold in the jig assembly 300, so as to ensure the stability of the lower mold during the processes of mold opening, filling and mold closing. After the mold closing is completed, the lower mold positioning drive 561 is used to drive the lower mold positioning suction nozzle 562 to move down, so as to wait for the next jig assembly 300 to enter the working position and start the next working cycle.

[0038] In this embodiment, the liquid injection unit includes a liquid injection needle group 410, a needle group module 420 for driving the liquid injection needle group 410 to move to a liquid injection position, a liquid injection device assembly 460 for extracting and injecting the raw material, a liquid injection valve group 450, and a constant-temperature bin 430 for storing the raw material. The liquid injection device assembly 460 and the constant-temperature bin 430 are both mounted on a liquid injection main frame 470. The liquid injection needle group 410 is connected to the liquid injection valve group 450 through a liquid injection hose 411. The liquid injection needle group 410 is mounted on an execution end of the needle group module 420, and the needle group module 420 is mounted on a side of the liquid injection main frame 470 through a liquid injection side frame 412. After the liquid injection device assembly 460 extracts the raw material from the constant-temperature bin 430, the liquid injection valve group 450 is switched to a liquid injection state, the needle group module 420 drives the liquid injection needle group 410 to the liquid injection position, and the liquid injection device assembly 460 pushes the raw material into the liquid injection needle group 410 to fill the mold in the jig assembly 300.

[0039] The liquid injection valve group 450 is a reversible three-way valve group, which is connected to the liquid injection needle group 410 and the constant-temperature bin 430. The needle group module 420 is mounted on the side of the liquid injection main frame 470, so that the overall layout is compact and unnecessary movement is avoided. During liquid injection filling, the liquid injection device assembly 460 performs the actions of extracting and injecting the raw material. During the extraction action, the liquid injection valve group 450 is in the extraction mode, the liquid injection device assembly 460 extracts the raw material from the constant-temperature bin 430 and temporarily stores it. The constant-temperature bin 430 is a small constant-temperature refrigerator. During the injection action, the liquid injection valve group 450 is switched to the injection mode, the liquid injection needle group 410 is driven by the needle group module 420 to move above the jig assembly 300, and the liquid injection device assembly 460 pushes the raw material into the liquid injection needle group 410 to complete the filling and injection action.

[0040] In the embodiment, the needle group module 420 comprises a needle group forward driving 421 installed on the liquid injection side frame 412, a displacement adjustment table 422 installed at the execution end of the needle group forward driving 421, and a needle group downward driving 423 installed at the execution end of the displacement adjustment table 422; the needle group forward driving 421 is a linear module, and the needle group downward driving 423 is a cylinder; the needle group forward driving 421 is used to drive the needle group downward driving 423 to move above the jig assembly 300, and the needle group downward driving 423 drives the needle group module 420 to inject liquid; the displacement adjustment table 422 between the needle group forward driving 421 and the needle group downward driving 423 is manually adjusted, so that the precise position of the execution end can be adjusted, and the quality problem caused by error can be avoided.

[0041] In the embodiment, the execution end of the needle group downward driving 423 is installed with a needle group mounting plate 424; a plurality of liquid injection needles are installed on the needle group mounting plate 424 to form the liquid injection needle group 410; when the number of injection needles needs to be adjusted, only the corresponding needle group mounting plate 424 needs to be replaced, so that the equipment adjustment and debugging can be quickly realized, and more types of contact lenses related jigs can be adapted.

[0042] In the embodiment, a liquid leakage collection bucket 480 is further installed below the liquid injection needle group 410; after the liquid injection is completed, the liquid injection needle group 410 returns to the initial static position under the driving of the needle group module 420, and the liquid leakage collection bucket 480 can prevent the residual raw materials of the needle from splashing.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the range defined by the spirit of the utility model.

Claims

1. A contact lens filling and molding device, characterized in that, It includes a mold opening and closing unit (500), a liquid injection unit (400), and a turnover unit (200) for transferring the jig assembly (300); the mold opening and closing unit (500) includes an upper mold positioning mechanism for defining the position of the lower mold, a lower mold positioning mechanism (560) for defining the position of the lower mold, and a mold opening mechanism (550) for opening the mold. During the filling and mold closing process, the turnover unit (200) transports the fixture assembly (300) to the predetermined position. After the lower mold positioning mechanism (560) positions the lower mold, the mold opening mechanism (550) separates the upper mold and the lower mold. The upper mold positioning mechanism moves the upper mold away from the lower mold. During the liquid injection operation, the liquid injection unit (400) fills the mold in the fixture assembly (300) with the raw material. During the mold closing process, the upper mold positioning mechanism moves the upper mold back to the lower mold and places the upper mold in the lower mold. The upper mold positioning mechanism applies pressure to the upper mold to press the upper mold and the lower mold together.

2. The contact lens filling and molding device according to claim 1, characterized in that, The upper mold positioning mechanism includes a suction nozzle assembly (540) and an upper mold module (520) that pushes the suction nozzle assembly (540) up and down. The upper mold module (520) includes an upper mold lifting drive (521) fixed on the upper mold support (510). The upper mold lifting drive (521) has an upper mold sliding frame (522) installed at its execution end. The upper mold sliding frame (522) is slidably installed on the upper mold support (510), and a suction nozzle mounting bracket (530) for installing the suction nozzle assembly (540) is provided at the bottom of the upper mold sliding frame (522).

3. The contact lens filling and molding device according to claim 2, characterized in that, The nozzle assembly (540) includes a plurality of nozzle slide rods (542) slidably mounted on the nozzle mounting bracket (530). Each nozzle slide rod (542) has an upper mold nozzle (541) mounted at its end, and each nozzle slide rod (542) has a mold closing counterweight (543) mounted on its body.

4. The contact lens filling and molding device according to claim 1, characterized in that, The mold opening mechanism (550) includes at least one mold opening drive (551), a fork connecting plate (552) mounted on the execution end of the mold opening drive (551), and a mold opening fork (553) mounted on the fork connecting plate (552) for inserting contact lenses.

5. The contact lens filling and molding device according to claim 1, characterized in that, The lower mold positioning mechanism (560) includes a lower mold positioning nozzle (562) disposed below the fixture assembly (300) and a lower mold positioning drive (561) that pushes the lower mold positioning nozzle (562) up and down.

6. The contact lens filling and molding device according to claim 1, characterized in that, The injection unit includes an injection needle assembly (410), a needle assembly module (420) for driving the injection needle assembly (410) to the injection position, an injector assembly (460) for extracting and injecting raw materials, an injection valve assembly (450), and a constant temperature chamber (430) for storing raw materials. The injector assembly (460) and the constant temperature chamber (430) are both mounted on the main injection frame (470); the injection needle assembly (410) is connected to the injection valve assembly (450) via an injection hose (411); the injection needle assembly (410) is mounted on the execution end of the needle assembly module (420), and the needle assembly module (420) is mounted on the side of the main injection frame (470) via an injection side frame (412); After the injector assembly (460) extracts the raw material from the constant temperature chamber (430), the injection valve assembly (450) switches to the injection state, the needle assembly module (420) drives the injection needle assembly (410) to the injection position, and the injector assembly (460) pushes the raw material into the injection needle assembly (410) to fill the mold in the fixture assembly (300).

7. The contact lens filling and molding device according to claim 6, characterized in that, The needle assembly module (420) includes a needle assembly forward movement drive (421) mounted on the injection side frame (412), a displacement adjustment platform (422) mounted on the execution end of the needle assembly forward movement drive (421), and a needle assembly downward pressure drive (423) mounted on the execution end of the displacement adjustment platform (422); a needle assembly mounting plate (424) is mounted on the execution end of the needle assembly downward pressure drive (423); a plurality of injection needles are mounted on the needle assembly mounting plate (424) to form an injection needle assembly (410).

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