Mold for contact lenses and forming process of mold

Abstract

The invention discloses a mold for contact lenses and a forming process thereof. The mold comprises a base; a first mounting seat and a lifting mechanism are arranged at the top of the base; a second mounting seat is arranged at the output end of the lifting mechanism; a lower die is arranged on the first mounting seat; an upper mold is arranged on the second mounting seat; the upper mold is positioned right above the lower mold; a plurality of arc-shaped grooves are distributed in the top end of the upper mold in a rectangular array; a plurality of arc-shaped convex blocks are arranged at the bottom end of the lower mold; the arc-shaped grooves and the arc-shaped protruding blocks are the same in number and are arranged in a one-to-one correspondence mode. A plurality of first cooling grooves are formed in the top end of the first mounting seat; the number of the first cooling grooves is the same as that of the arc-shaped grooves, and the first cooling grooves and the arc-shaped grooves are in one-to-one correspondence; and a thermoelectric refrigeration sheet is arranged on the inner bottom wall of each first cooling groove. Through refrigeration of the thermoelectric refrigeration sheet, the contact lenses can be rapidly cooled, cured and molded, so that the production efficiency of the contact lenses can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of contact lens production, and more particularly to a mold for contact lenses and its molding process. Background Art

[0002] Contact lenses, also known as corneal contact lenses or corneal contact glasses, refer to lenses that are worn on the cornea of the eyeball to correct vision or protect the eyes. Colored contact lenses are contact lenses. According to the hardness of the material, it includes hard, semi-hard, and soft types. Contact lenses have not only brought great improvements to patients with refractive errors such as myopia, hyperopia, and astigmatism in terms of appearance and convenience. Moreover, the field of vision is wide and the vision is vivid. In addition, it also plays a special role in controlling the development of myopia and astigmatism in teenagers and treating special eye diseases.

[0003] The Chinese utility model patent with the publication number CN221892383U discloses a mold for producing silicone hydrogel contact lenses, which relates to the technical field of molds. The present utility model includes a base, a clamping plate is fixedly connected to the surface of the driven component, a limiting component for fixing the mold is arranged on the top surface of the base, and a fixing component for fixing the upper mold is arranged on the surface of the moving component. When the mold needs to be disassembled and cleaned in the present utility model, through the control of the control switch, then the electric push rod pushes the lower mold out a certain distance through the limiting block, which facilitates the removal process of the lower mold. Pull out the pin from the jack, place the lower mold on the base, and the limiting block is brought back to the original position by the electric push rod, and the lower mold fits with the limiting block. Similarly, the driving component and the driven component drive the clamping plate to clamp and position the lower mold, achieving the goal of facilitating the disassembly and assembly of the mold base. Therefore, when disassembling and cleaning the mold base, it is not necessary to waste a large amount of disassembly and assembly time, which facilitates the cleaning work of the mold base.

[0004] The mold in the above patent needs to be naturally cooled and solidified before demolding during the production of contact lenses, resulting in the problem of low production efficiency.

[0005] Therefore, how to provide a mold for contact lenses and its molding process that can improve production efficiency is one of the technical problems urgently needed to be solved in this field. Summary of the Invention

[0006] In view of this, the present invention provides a mold for contact lenses and its molding process, and the purpose is to solve the problems in the prior art.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A mold for contact lenses, comprising: a base; a first mounting seat and a lifting mechanism are provided on the top of the base; a second mounting seat is provided at the output end of the lifting mechanism; a lower mold is provided on the first mounting seat; an upper mold is provided on the second mounting seat; the upper mold is located directly above the lower mold; a plurality of arc-shaped grooves are distributed in a rectangular array at the top end of the upper mold; a plurality of arc-shaped protrusions are provided at the bottom end of the lower mold; the number of the arc-shaped grooves is the same as that of the arc-shaped protrusions, and they are arranged in one-to-one correspondence; a plurality of first cooling grooves are formed at the top end of the first mounting seat; the number of the first cooling grooves is the same as that of the arc-shaped grooves, and they are arranged in one-to-one correspondence; a thermoelectric cooler is provided on the inner bottom wall of each first cooling groove.

[0009] Preferably, adjacent first cooling grooves in each row are communicated through a first connection channel; first air cavities are provided on both the left and right sides inside the first mounting seat; the outermost first cooling groove is communicated with the corresponding first air cavity through a second connection channel; first circulation pipes are provided on both the left and right sides of the first mounting seat; one end of each first circulation pipe is communicated with the corresponding first air cavity; a circulation fan is provided on one of the first circulation pipes; a second cooling groove is provided inside the arc-shaped protrusion; a cavity corresponding to the second cooling groove is provided inside the upper mold; the cavity is communicated with the corresponding second cooling groove; adjacent cavities in each row are communicated through a third connection channel; second air cavities are symmetrically provided on both sides inside the upper mold; the outermost cavity is communicated with the second air cavity through a fourth connection channel; second circulation pipes are symmetrically provided on both the left and right sides of the upper mold; the second circulation pipes are communicated with the second air cavities; an insertion joint adapted to the second circulation pipe is provided at one end of the first circulation pipe away from the first air cavity.

[0010] Preferably, the lifting mechanism includes two columns; the two columns are symmetrically arranged on the left and right sides of the top end of the base; the first mounting seat is located between the two columns; a lifting groove is formed inside the column; a lead screw is rotatably connected inside the lifting groove; driving blocks are symmetrically provided on both the left and right sides of the second mounting seat; the driving blocks are threadedly connected to the corresponding lead screws; a motor is provided outside the base; a transmission assembly is provided inside the base; the motor is drivingly connected to the two lead screws through the transmission assembly.

[0011] Preferably, the transmission assembly includes a transmission shaft; a working cavity is provided inside the base; the transmission shaft is rotatably connected inside the working cavity; one end of the transmission shaft is connected to the output end of the motor; the bottom end of the lead screw extends downward into the working cavity and is provided with a driven bevel gear; a driving bevel gear corresponding to the driven bevel gear is provided on the transmission shaft; the driven bevel gear meshes with the corresponding driving bevel gear.

[0012] Preferably, first sliders are symmetrically arranged on both sides of the driving block; first sliding grooves adapted to the first sliders are formed on the inner wall of the lifting groove; the first sliders are slidably connected in the corresponding first sliding grooves.

[0013] Preferably, a top plate is provided at the top of the column; an air pump is provided at the top of the top plate; an air outlet pipe is provided at the air outlet of the air pump; a plurality of air holes are evenly distributed around the root of the arc-shaped convex block; a third air cavity is provided inside the upper mold; the air holes are communicated with the third air cavity; a first through hole adapted to the air outlet pipe is formed at the top of the second mounting seat; a second through hole communicated with the first through hole is formed at the top of the upper mold; the second through hole is communicated with the third air cavity.

[0014] Preferably, a fixing plate is provided at the rear side of the top of the base; a guiding plate is rotatably connected to the upper front side of the fixing plate; a limiting plate is provided at the top of the guiding plate; a driving plate corresponding to the limiting plate is provided at the rear side of the second mounting seat.

[0015] Preferably, a pulley is rotatably connected to the driving plate.

[0016] Preferably, an installation groove is provided inside the second mounting seat; second sliding grooves are formed on the inner walls of the left and right sides of the installation groove; second sliders adapted to the second sliding grooves are provided on the upper mold; the second sliders are slidably connected in the corresponding second sliding grooves.

[0017] A molding process for contact lenses, using the above-mentioned mold for contact lenses, includes the following steps:

[0018] S1: Inject the material for preparing contact lenses into the arc-shaped groove.

[0019] S2: Drive the second mounting seat to move downward through the lifting mechanism, and the second mounting seat drives the upper mold to move downward until the lower mold and the upper mold are closed.

[0020] S3: Start the thermoelectric cooler to cool the contact lenses between the lower mold and the upper mold until the contact lenses are solidified and formed.

[0021] S4: Drive the upper mold to move upward through the lifting mechanism to separate the lower mold and the upper mold, and then take off the contact lenses.

[0022] The present invention has achieved the following technical effects compared with the prior art:

[0023] 1) By refrigerating with the thermoelectric cooler, the present invention can quickly cool and solidify the contact lenses to form, thereby improving the production efficiency of contact lenses.

[0024] 2) The components of the present invention, such as the circulation fan, the first circulation pipe, the second circulation pipe, the first cooling tank, and the second cooling tank, cooperate with each other to cool the arc-shaped groove and the arc-shaped protrusion simultaneously, thereby not only improving the cooling and curing efficiency of the contact lens, but also making the cooling of the contact lens more uniform and improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view of a mold for contact lenses of the present invention;

[0026] Figure 2 is Figure 1 the enlarged partial view of part A in

[0027] Figure 3 is Figure 1 the enlarged partial view of part B in

[0028] Figure 4 is Figure 1 the enlarged partial view of part C in

[0029] Figure 5 is Figure 1 the enlarged partial view of part D in

[0030] Figure 6 is the side view of a mold for contact lenses of the present invention;

[0031] In the figure: 1, base; 2, first mounting seat; 3, second mounting seat; 4, lower mold; 5, upper mold; 6, arc-shaped groove; 7, arc-shaped protrusion; 8, first cooling tank; 9, thermoelectric cooler; 10, first connection channel; 11, first air cavity; 12, second connection channel; 13, first circulation pipe; 14, circulation fan; 15, second cooling tank; 16, cavity; 17, third connection channel; 18, second air cavity; 19, fourth connection channel; 20, second circulation pipe; 21, plug connector; 22, column; 23, lifting groove; 24, lead screw; 25, driving block; 26, motor; 27, transmission shaft; 28, working cavity; 29, driven bevel gear; 30, driving bevel gear; 31, first slider; 32, top plate; 33, air pump; 34, air outlet pipe; 35, air hole; 36, third air cavity; 37, first through hole; 38, second through hole; 39, fixing plate; 40, guiding plate; 41, limiting plate; 42, driving plate; 43, pulley; 44, second slider; 45, fixing frame; 46, first positioning rod; 47, pull ring; 48, second positioning hole; 49, limiting ring; 50, spring; 51, second positioning rod. DETAILED DESCRIPTION OF THE INVENTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to Figure 1-5 As shown, the present invention provides a mold for contact lenses, including: a base 1; a first mounting seat 2 and a lifting mechanism are provided on the top of the base 1; a second mounting seat 3 is provided at the output end of the lifting mechanism; a lower mold 4 is provided on the first mounting seat 2; an upper mold 5 is provided on the second mounting seat 3; the upper mold 5 is located directly above the lower mold 4; a plurality of arc-shaped grooves 6 are distributed in a rectangular array at the top end of the upper mold 5; a plurality of arc-shaped protrusions 7 are provided at the bottom end of the lower mold 4; the number of the arc-shaped grooves 6 is the same as that of the arc-shaped protrusions 7, and they are arranged in one-to-one correspondence; a plurality of first cooling grooves 8 are formed in the top end of the first mounting seat 2; the number of the first cooling grooves 8 is the same as that of the arc-shaped grooves 6, and they are arranged in one-to-one correspondence; a thermoelectric cooler 9 is provided on the inner bottom wall of each first cooling groove 8; during use, first, the material for preparing contact lenses is injected into the arc-shaped grooves 6, then the second mounting seat 3 is driven to move downward by the lifting mechanism, and then the upper mold 5 is driven to move downward by the second mounting seat 3 until the lower mold 4 and the upper mold 5 are closed. Subsequently, the thermoelectric cooler 9 is started to cool the contact lenses between the lower mold 4 and the upper mold 5 until the contact lenses are solidified and formed. Finally, the upper mold 5 is driven to move upward by the lifting mechanism to separate the lower mold 4 from the upper mold 5, and then the contact lenses can be taken off.

[0034] The above technical solution can quickly cool and solidify the contact lenses by refrigeration with the thermoelectric cooler, so as to improve the production efficiency of contact lenses.

[0035] In this embodiment, adjacent first cooling grooves 8 in each row are communicated through a first connection channel 10; first air cavities 11 are provided on both the left and right sides inside the first mounting base 2; the outermost first cooling grooves 8 are communicated with the corresponding first air cavities 11 through second connection channels 12; first circulation pipes 13 are provided on both the left and right sides of the first mounting base 2; one end of each first circulation pipe 13 is communicated with the corresponding first air cavity 11; a circulation fan 14 is provided on one first circulation pipe 13; the end of the first circulation pipe 13 away from the first air cavity 11 is vertically arranged; a second cooling groove 15 is provided inside the arc-shaped convex block 7; a cavity 16 corresponding to the second cooling groove 15 is provided inside the upper mold 5; the number of cavities 16 is the same as that of the second cooling grooves 15, and they are arranged in one-to-one correspondence; the cavity 16 is communicated with the corresponding second cooling groove 15; adjacent cavities 16 in each row are communicated through a third connection channel 17; second air cavities 18 are symmetrically provided on both sides inside the upper mold 5; the outermost cavity 16 is communicated with the second air cavity 18 through a fourth connection channel 19; second circulation pipes 20 are symmetrically provided on both the left and right sides of the upper mold 5; the second circulation pipes 20 are communicated with the second air cavities 18; the end of the second circulation pipe 20 away from the second air cavity 18 is vertically arranged; an insertion joint 21 adapted to the second circulation pipe 20 is provided at the end of the first circulation pipe 13 away from the first air cavity 11; during use, when the upper mold 5 moves downward to be clamped with the lower mold 4, the end of the second circulation pipe 20 away from the second air cavity 18 just inserts into the corresponding insertion joint 21, so that a circulation path is formed between the first cooling groove 8 and the second cooling groove 15. The thermoelectric cooler 9 is started for refrigeration and cooling, and at the same time, the circulation fan 14 is started to make the air in the first cooling groove 8 and the second cooling groove 15 circulate, so that the arc-shaped groove 6 and the arc-shaped convex block 7 can be cooled simultaneously, which can not only improve the cooling and curing efficiency of the contact lens, but also make the contact lens cooler more evenly and improve the product quality.

[0036] In this embodiment, the lifting mechanism includes two columns 22; the two columns 22 are symmetrically arranged on the left and right sides of the top of the base 1; the first mounting base 2 is located between the two columns 22; a lifting groove 23 is formed inside the column 22; a lead screw 24 is provided inside the lifting groove 23; the top of the lead screw 24 is rotatably connected to the inner top wall of the lifting groove 23, and the bottom of the lead screw 24 is rotatably connected to the inner bottom wall of the lifting groove 23; driving blocks 25 are symmetrically provided on both the left and right sides of the second mounting base 3; the driving blocks 25 are threadedly connected to the corresponding lead screws 24 through lead screw nuts; a motor 26 is provided outside the base 1; a transmission assembly is provided inside the base 1; the motor 26 is drivingly connected to the two lead screws 24 through the transmission assembly; during use, the motor 26 drives the two lead screws 24 to rotate through the transmission assembly, the lead screws 24 drive the driving blocks 25 to move up and down, the driving blocks 25 drive the second mounting base 3 to move up and down, and the second mounting base 3 drives the upper mold 5 to move up and down, realizing the opening and closing of the upper mold 5 and the lower mold 4.

[0037] In this embodiment, the transmission assembly includes a transmission shaft 27; a working cavity 28 is provided inside the base 1; the transmission shaft 27 is rotatably connected inside the working cavity 28; one end of the transmission shaft 27 is connected to the output end of the motor 26; the bottom end of the lead screw 24 extends downward into the working cavity 28 and is provided with a driven bevel gear 29; a driving bevel gear 30 corresponding to the driven bevel gear 29 is provided on the transmission shaft 27; the number of driving bevel gears 30 and driven bevel gears 29 is the same and they are arranged in one-to-one correspondence; the driven bevel gear 29 meshes with the corresponding driving bevel gear 30; during use, the motor 26 drives the transmission shaft 27 to rotate, the transmission shaft 27 drives the driving bevel gear 30 to rotate, the driving bevel gear 30 drives the driven bevel gear 29 to rotate, and the driven bevel gear 29 drives the lead screw 24 to rotate.

[0038] In this embodiment, first sliders 31 are symmetrically arranged on the front and rear sides of the driving block 25; first sliding grooves adapted to the first sliders 31 are formed on the inner wall of the lifting groove 23; the first sliders 31 are slidably connected in the corresponding first sliding grooves; through the cooperation of the first sliders 31 and the first sliding grooves, the driving block 25 is slidably connected in the lifting groove 23, so that the movement process of the second mounting seat 3 can be more stable.

[0039] In this embodiment, a top plate 32 is provided at the top of the column 22; an air pump 33 is provided at the top of the top plate 32; an air outlet pipe 34 is provided at the air outlet of the air pump 33; a plurality of air holes 35 are evenly distributed around the root of the arc-shaped convex block 7; the air holes 35 do not interfere with the third connection channel 17 and the fourth connection channel 19; a third air cavity 36 is provided inside the upper mold 5; the air holes 35 are communicated with the third air cavity 36; a first through hole 37 adapted to the air outlet pipe 34 is formed at the top of the second mounting seat 3; a second through hole 38 communicated with the first through hole 37 is formed at the top of the upper mold 5; the second through hole 38 is communicated with the third air cavity 36; when the contact lens is cured and formed, the lifting mechanism drives the upper mold 5 to move upward to a preset position. At this time, the end of the air outlet pipe 34 away from the air pump 33 just inserts into the first through hole 37. Then, the air pump 33 is started, and the air pump 33 sucks in air and blows it out through the air outlet pipe 34, the first through hole 37, the second through hole 38, the third air cavity 36 and the air holes in sequence, so as to blow the contact lens off the surface of the arc-shaped convex block.

[0040] In this embodiment, a fixing plate 39 is provided at the rear side of the top end of the base 1; the fixing plate 39 is located behind the second mounting seat 3; the upper end of the front side of the fixing plate 39 is rotatably connected to a material guiding plate 40; a limiting plate 41 is provided at the top end of the material guiding plate 40; a driving plate 42 corresponding to the limiting plate 41 is provided at the rear side of the second mounting seat 3; when the second mounting seat 3 rises to a certain height, the driving plate 42 contacts the limiting plate 41, and then the second mounting seat 3 continues to rise to a preset position. During this process, the driving plate 42 drives the material guiding plate 40 to rotate through the limiting plate 41, so that the material guiding plate 40 tilts forward by a certain angle, so that the contact lenses blown off by the air pump 33 fall onto the material guiding plate 40, which is convenient for collecting the contact lenses.

[0041] In this embodiment, a pulley 43 is rotatably connected to the driving plate 42; the driving plate 42 contacts the limiting plate 41 through the pulley 43, so that the driving plate 42 can drive the limiting plate 41 to rotate more smoothly and avoid jamming.

[0042] In this embodiment, two mounting plates are symmetrically provided at the upper end of the front side of the fixing plate 39; rotating shafts are symmetrically provided at the left and right sides of the upper end of the material guiding plate 40; the rotating shafts are rotatably connected to the corresponding mounting plates.

[0043] In this embodiment, an installation groove is provided inside the second mounting seat 3; second sliding grooves are opened on the inner walls of the left and right sides of the installation groove; second sliding blocks 44 adapted to the second sliding grooves are provided on the upper die 5; the second sliding blocks 44 are slidably connected to the corresponding second sliding grooves; through the cooperation of the second sliding blocks 44 and the second sliding grooves, the upper die 5 is slidably connected inside the second mounting seat 3, which is convenient for the installation and disassembly of the upper die.

[0044] In this embodiment, a fixing frame 45 is provided at the front side of the top end of the second mounting seat 3; a first positioning rod 46 is provided inside the fixing frame 45; the top end of the first positioning rod 46 extends upward above the fixing frame 45 and is provided with a pull ring 47; a first positioning hole corresponding to the first positioning rod 46 is formed at the top end of the second mounting seat 3; a second positioning hole 48 corresponding to the first positioning hole is formed at the top end of the upper mold 5; a limiting ring 49 is fixedly sleeved outside the first positioning rod 46; the limiting ring 49 is located above the second mounting seat 3; a spring 50 is sleeved outside the first positioning rod 46; the top end of the spring 50 is fixedly connected to the fixing frame 45, and the bottom end of the spring 50 is fixedly connected to the top end of the limiting ring 49, and under the action of the spring 50, the bottom end of the limiting ring 49 abuts against the top end of the second mounting seat 3; when the upper mold 5 needs to be taken out, pull the pull ring 47 upward, the pull ring 47 drives the first positioning rod 46 to move upward, so that the pull rod disengages from the second positioning hole 48, and then the upper mold 5 can be pulled out of the second mounting seat 3. When the upper mold 5 needs to be installed, pull the pull ring 47 upward to make the pull rod disengage from the second positioning hole 48, then push the upper mold 5 into the installation groove on the second mounting seat 3, release the pull ring 47, and the first positioning rod 46 is inserted into the second positioning hole 48 again under the action of the spring 50, and the installation of the upper mold 5 can be completed. The operation is simple and convenient.

[0045] In this embodiment, the number of the fixing frames 45 is two; the two fixing frames 45 are symmetrically arranged left and right.

[0046] In this embodiment, four second positioning rods 51 are evenly distributed on the periphery of the bottom end of the lower mold 4; a third positioning hole adapted to the second positioning rod 51 is provided at the top end of the first mounting seat 2; the number of the third positioning holes is the same as that of the second positioning rods 51 and they are arranged in one-to-one correspondence; the second positioning rods 51 are inserted into the corresponding third positioning holes; through the cooperation of the second positioning rods 51 and the third positioning holes, the rapid positioning and installation of the lower mold can be realized, and the disassembly of the lower mold 4 is convenient.

[0047] In this embodiment, a limiting block is provided at the middle position of the front side of the fixing plate 39 for limiting the guide plate 40; by providing the limiting block, the lower guide plate can be kept in a vertical state when not receiving materials.

[0048] The present invention also provides a molding process for contact lenses, using the above-mentioned mold for contact lenses, including the following steps:

[0049] S1: Inject the material for preparing the contact lens into the arc-shaped groove 6;

[0050] S2: Drive the second mounting seat 3 to move downward through the lifting mechanism, the second mounting seat 3 drives the lower mold 4 to move downward until the lower mold 4 and the upper mold 5 are closed;

[0051] S3: Start the thermoelectric cooler 9 to cool the contact lens between the lower mold 4 and the upper mold 5 until the contact lens is solidified and formed;

[0052] S4: Drive the lower mold 4 to move upward through the lifting mechanism to separate the lower mold 4 from the upper mold 5, and then remove the contact lens.

[0053] As mentioned above, it is only a preferred embodiment of the present invention, and it does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A mold for contact lenses, characterized in that: include: A base (1); a first mounting seat (2) and a lifting mechanism are provided on the top of the base (1); a second mounting seat (3) is provided at the output end of the lifting mechanism; a lower mold (4) is provided on the first mounting seat (2); an upper mold (5) is provided on the second mounting seat (3); the upper mold (5) is located directly above the lower mold (4); a plurality of arc-shaped grooves (6) are distributed in a rectangular array on the top of the upper mold (5); a plurality of arc-shaped protrusions (7) are provided on the bottom of the lower mold (4); the number of the arc-shaped grooves (6) is the same as that of the arc-shaped protrusions (7), and they are arranged one-to-one; a plurality of first cooling grooves (8) are provided on the top of the first mounting seat (2); the number of the first cooling grooves (8) is the same as that of the arc-shaped grooves (6), and they are arranged one-to-one; a thermoelectric cooling plate (9) is provided on the inner bottom wall of each of the first cooling grooves (8).

2. A mold for contact lenses according to claim 1, characterized in that: Each row of adjacent first cooling grooves (8) is connected via a first connecting channel (10); first air cavities (11) are provided on both left and right sides of the first mounting seat (2); the outermost first cooling groove (8) is connected to the corresponding first air cavity (11) via a second connecting channel (12); first circulation pipes (13) are provided on both left and right sides of the first mounting seat (2); one end of the first circulation pipe (13) is connected to the corresponding first air cavity (11); a circulation fan (14) is provided on one of the first circulation pipes (13); a second cooling groove (15) is provided inside the arc-shaped protrusion (7); a second cooling groove (15) is provided inside the upper mold (5) The upper mold (5) has a corresponding cavity (16); the cavity (16) is connected to the corresponding second cooling groove (15); each row of adjacent cavities (16) is connected through a third connecting channel (17); second air cavities (18) are symmetrically arranged on both sides of the interior of the upper mold (5); the outermost cavity (16) is connected to the second air cavity (18) through a fourth connecting channel (19); second circulation pipes (20) are symmetrically arranged on the left and right sides of the upper mold (5); the second circulation pipe (20) is connected to the second air cavity (18); and a plug connector (21) adapted to the second circulation pipe (20) is provided at one end of the first circulation pipe (13) away from the first air cavity (11).

3. A mold for contact lenses according to claim 2, characterized in that: The lifting mechanism comprises two columns (22); the two columns (22) are symmetrically arranged on the left and right sides of the top of the base (1); the first mounting seat (2) is located between the two columns (22); a lifting groove (23) is provided inside the column (22); a screw rod (24) is rotatably connected inside the lifting groove (23); driving blocks (25) are symmetrically provided on the left and right sides of the second mounting seat (3); the driving blocks (25) are threadedly connected to the corresponding screw rods (24); a motor (26) is provided on the outside of the base (1); a transmission assembly is provided inside the base (1); the motor (26) is transmission-connected to the two screw rods (24) through the transmission assembly.

4. A mold for contact lenses according to claim 3, characterized in that: The transmission assembly comprises a transmission shaft (27); a working chamber (28) is provided inside the base (1); the transmission shaft (27) is rotatably connected to the working chamber (28); one end of the transmission shaft (27) is connected to the output end of the motor (26); the bottom end of the screw rod (24) extends downward into the working chamber (28) and is provided with a driven bevel gear (29); a driving bevel gear (30) corresponding to the driven bevel gear (29) is provided on the transmission shaft (27); and the driven bevel gear (29) is meshed with the corresponding driving bevel gear (30).

5. A mold for contact lenses according to claim 4, characterized in that: First sliding blocks (31) are symmetrically arranged on both sides of the driving block (25); a first sliding groove matched with the first sliding block (31) is opened on the inner wall of the lifting groove (23); and the first sliding block (31) is slidably connected in the corresponding first sliding groove.

6. A mold for contact lenses according to claim 3, characterized in that: The top of the column (22) is provided with a top plate (32); the top of the top plate (32) is provided with an air pump (33); the air outlet of the air pump (33) is provided with an air outlet pipe (34); a plurality of air holes (35) are evenly distributed around the root of the arc-shaped protrusion (7); a third air cavity (36) is provided inside the upper mold (5); the air hole (35) is connected to the third air cavity (36); the top of the second mounting seat (3) is provided with a first through hole (37) adapted to the air outlet pipe (34); the top of the upper mold (5) is provided with a second through hole (38) connected to the first through hole (37); the second through hole (38) is connected to the third air cavity (36).

7. A mold for contact lenses according to claim 6, characterized in that: A fixing plate (39) is provided at the rear side of the top end of the base (1); a material guide plate (40) is rotatably connected to the upper end of the front side of the fixing plate (39); a limiting plate (41) is provided at the top end of the material guide plate (40); and a driving plate (42) corresponding to the limiting plate (41) is provided at the rear side of the second mounting seat (3).

8. A mold for contact lenses according to claim 7, characterized in that: The driving plate (42) is rotatably connected to a pulley (43).

9. A mold for contact lenses according to claim 1, characterized in that: The second mounting seat (3) is provided with a mounting groove inside; the inner walls on both sides of the mounting groove are provided with second sliding grooves; the upper mold (5) is provided with a second sliding block (44) adapted to the second sliding groove; the second sliding block (44) is slidably connected in the corresponding second sliding groove.

10. A molding process for contact lenses, characterized in that: Utilize the mold for contact lens as described in any one of claims 1-9, comprise the following steps: S1: injecting materials for preparing contact lenses into the arc-shaped groove (6); S2: The second mounting seat (3) is driven to move downward by the lifting mechanism, and the second mounting seat (3) drives the upper mold (5) to move downward until the lower mold (4) and the upper mold (5) are completely molded; S3: starting the thermoelectric cooling sheet (9) to cool the contact lens between the lower mold (4) and the upper mold (5) until the contact lens is solidified and formed; S4: The upper mold (5) is driven upward by the lifting mechanism to separate the lower mold (4) from the upper mold (5), and then the contact lens is removed.

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