CN110843169A

CN110843169A - Lens forming system and forming method thereof

Info

Publication number: CN110843169A
Application number: CN201911227983.1A
Authority: CN
Inventors: 刘雪石; 汪志勋; 谢志波
Original assignee: DONGGUAN XURUI PHOTOELECTRIC TECHNOLOGY Co Ltd
Current assignee: DONGGUAN XURUI PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-02-28
Also published as: TW202122254A; TWI718885B

Abstract

The invention relates to the technical field of optical lens manufacturing, in particular to a lens forming system and a forming method thereof, wherein the lens forming system comprises a lens forming mold, gas pressure control equipment and high-pressure gas generating equipment; the lens forming mold comprises a first template and a second template; a lens mold cavity is formed between the first mold plate and the second mold plate; the second template is provided with a runner communicated with the lens mold cavity; the first template is provided with an injection gate communicated with the runner; the second template is provided with a gas channel communicated with the lens mold cavity; the output end of the high-pressure gas generating equipment is communicated with the gas channel after passing through the gas pressure control equipment. The invention carries out reverse pressure on the flow front edge of the melt by controlling the change of the gas pressure in the lens die cavity, improves the pressure of the flow front edge of the melt in the forming process, and suppresses the spring phenomenon of the melt at the upper side and the lower side, thereby changing the flow direction of the melt, and achieving the purpose of changing the welding angle of the bonding line and eliminating the bonding line.

Description

Lens forming system and forming method thereof

Technical Field

The invention relates to the technical field of optical lens manufacturing, in particular to a lens forming system and a forming method thereof.

Background

In recent years, with the rapid development of mobile electronic industries such as smart phone industry, the demand for the camera lens mounted inside the mobile electronic industry is continuously increased, which further drives the development of the optical lens manufacturing industry, and the demand for the optical lens is continuously increased, so how to improve the productivity and quality of the optical lens becomes an important problem to be solved urgently.

The conventional optical lens is mainly made of plastic and is formed by injection molding through a CIM (common information model) process; as shown in fig. 1 and fig. 2, in the manufacturing process of the lens, since the depth of the middle part of the mold cavity is greater than four sides (the thickness of the edge of the product is greater than the thickness of the center), the flow direction of the melt is as shown in fig. 1, and when the melts on the upper side and the lower side are combined, a combination line as shown in fig. 2 is formed at the combination part, and the combination line greatly influences the quality of the optical lens.

In the conventional injection molding process, the melt at the flow front in the lens mold cavity can be regarded as a free flow state, the melt pressure at the front is almost zero, and the flow direction of the melt at the front is directly influenced by the wall thickness of a product, namely, the melt is shown in fig. 1. Therefore, the joint line generated during injection molding under the characteristic of the convex-concave structure of the optical white lens exists inevitably, most of the current process debugging methods for the joint line of the injection molding product weaken the visual sense of the joint line by improving the material temperature and the mold temperature and improving the injection molding pressure and flow, and the used process method is light and has low universality and cannot eliminate the joint line fundamentally.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned deficiencies in the art and providing a lens molding system and method for molding lenses that eliminates the lens knit line.

The purpose of the invention is realized by the following technical scheme: a lens molding system includes a lens molding die, a gas pressure control device, and a high-pressure gas generating device;

the lens forming mold comprises a first template and a second template; a lens mold cavity is formed between the first mold plate and the second mold plate; the second template is provided with a runner communicated with the lens mold cavity; the first template is provided with an injection gate communicated with the runner; the second template is provided with a gas channel communicated with the lens mold cavity;

the output end of the high-pressure gas generating equipment is communicated with the gas channel after passing through the gas pressure control equipment.

The invention is further arranged that the gas channel comprises a first gas path arranged on the second template; the second template is provided with an air groove; the gas channel further comprises a first gas channel formed between the first mold plate and the second mold plate and communicating with the lens mold cavity; the gas channel further comprises a second gas channel which is formed between the first template and the gas groove and is communicated with the first gas path; the first air passage is communicated with the second air passage;

the output end of the high-pressure gas generating equipment is communicated with the first gas path after passing through the gas pressure control equipment.

The invention is further arranged that the first template is provided with a first insert; the second template is provided with a second insert; the lens mold cavity is arranged between the first mold insert and the second mold insert; the gas groove is formed in the top of the second insert; the first air passage is arranged between the first insert and the second insert; the second air passage is arranged between the first insert and the air groove;

the first air channel is annularly arranged around the lens mold cavity; the second air passage is annularly arranged around the first air passage; the cross section width of the second air passage is larger than that of the first air passage;

the first air passage is arranged in the second template; the second template is provided with an air inlet communicated with the first air passage; a linear groove is formed in the top of the second template; the gas channel also comprises a second gas path which is formed between the first template and the linear groove and is communicated with the first gas path; the second air passage is communicated with the first air passage through a second air passage;

one end of the second air path is communicated with the second air passage; the other end of the second air path is provided with a first sealing ring; the second template is provided with a sealing groove for placing a first sealing ring;

the output end of the high-pressure gas generating equipment is communicated with the gas inlet through gas pressure control equipment.

The invention is further arranged that the second insert is provided with a sprue communicated with the lens mold cavity; one end of the runner is communicated with the gate; the other end of the runner is communicated with the injection gate; and the inlet pouring gate is provided with an inlet pouring inclined plane.

The invention is further provided that the second template is movably provided with a top plate; a first ejector pin and a second ejector pin are arranged on the top plate; one end of the first ejector pin is connected with the top plate; the other end of the first thimble is movably arranged in the flow passage;

one end of the second ejector pin is connected with the top plate; the other end of the second thimble is movably arranged in the lens die cavity;

second sealing rings are arranged between the first ejector pin and the second template and between the second ejector pin and the second template;

the first template is a fixed mould; the second template is a movable template;

the fixed die is provided with a guide post; the movable mould is provided with a guide groove matched with the guide post.

The invention is further provided that the top of the second template is provided with a detection groove communicated with the flow channel; a detection path communicated with the detection groove is arranged in the second template; the second template is provided with a pressure gauge communicated with the detection path;

the detection grooves comprise a first detection groove and a second detection groove; one end of the first detection groove is communicated with the flow channel; the other end of the first detection groove is communicated with one end of the second detection groove; the other end of the second detection groove is communicated with the detection path; the second detection groove has a cross-sectional width greater than that of the first detection groove.

The invention is further provided that the high-pressure gas generating device comprises an inert gas supply source and a high-pressure gas storage cylinder; the inert gas supply source is connected with the gas pressure control equipment through the high-pressure gas storage cylinder; the high-pressure gas storage cylinder is provided with a gas supercharger;

and nitrogen is arranged in the inert gas supply source.

The invention further provides that the gas pressure control apparatus comprises a gas pressure regulating valve and a controller for controlling the gas pressure regulating valve; the input end of the gas pressure regulating valve is connected with high-pressure gas generating equipment; the output end of the gas pressure regulating valve is connected with the gas channel; the controller is a single chip microcomputer.

A lens molding method comprising the steps of:

A. parameter setting step: setting parameters of a lens forming mold, parameters of gas pressure control equipment and parameters of high-pressure gas generation equipment;

B. a mold closing step: carrying out die assembly operation on the first template and the second template;

C. a pressurization step: inert gas enters the lens mold cavity from the gas channel by controlling the high-pressure gas generating equipment and the gas pressure control equipment, so that the rapid pressurization of the gas in the lens mold cavity is realized;

D. filling: when the gas pressure of the lens mold cavity reaches a set value, the pressurization of the lens mold cavity is stopped, and the injection process of the melt is carried out through the injection gate and the flow channel;

E. constant pressure step: the lens mold cavity is kept in a set constant high-pressure state through the control of a gas pressure control device and a gas channel;

F. pressure maintaining step: the gas pressure control equipment sets the pressure maintaining time for the gas action and synchronously sets the pressure maintaining pressure to make up the defect caused by uneven shrinkage of the solution;

G. pressure relief: when the gas action is finished and the pressure maintaining is finished, high-pressure gas in the lens mold cavity is released and exhausted to the outside of the lens mold cavity through a gas channel in gas pressure control equipment;

H. and (3) cooling: after the pressure relief is finished, cooling a product in the lens mold cavity;

I. opening the mold: and opening the first template and the second template so as to eject the product.

The invention is further arranged that in step E the gas pressure control device maintains a constant high pressure on the lens mould cavity through the pressure maintaining valve.

The invention has the beneficial effects that: the invention carries out reverse pressure on the flow front edge of the melt by controlling the change of the gas pressure in the lens die cavity, improves the pressure of the flow front edge of the melt in the forming process, and suppresses the spring phenomenon of the melt at the upper side and the lower side, thereby changing the flow direction of the melt, and achieving the purpose of changing the welding angle of the bonding line and eliminating the bonding line.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.

FIG. 1 is a diagram of an optical lens forming process of a conventional CIM process;

FIG. 2 is a schematic structural diagram of a conventional optical lens;

FIG. 3 is a schematic view of the present invention during pressurization;

FIG. 4 is a schematic diagram of the present invention in a configuration in which a constant high pressure is maintained;

FIG. 5 is a schematic view of the invention in pressure relief configuration;

FIG. 6 is a schematic view of the lens-forming mold of the present invention;

FIG. 7 is an exploded view of the lens-forming mold of the present invention;

FIG. 8 is a schematic structural view of a second template of the present invention;

fig. 9 is a schematic view of a second insert of the present invention;

FIG. 10 is a cross-sectional view of a lens-forming mold of the present invention;

fig. 11 is an exploded view of the mating of a first insert and a second insert of the present invention;

FIG. 12 is a partial enlarged view of portion A of FIG. 10;

FIG. 13 is a partial enlarged view of portion B of FIG. 11;

FIG. 14 is a diagram of a process for molding an optical lens according to the present invention;

wherein: 1. a lens forming mold; 11. a first template; 111. pouring a gate; 112. a first insert; 113. a guide post; 12. a second template; 121. a flow channel; 122. a first gas path; 123. an air inlet; 124. a linear groove; 125. a second gas path; 126. a guide groove; 13. a lens mold cavity; 141. a first air passage; 142. a second air passage; 15. a second insert; 151. an air tank; 152. a gate is arranged; 153. pouring an inclined plane; 161. a first seal ring; 162. a sealing groove; 17. a top plate; 171. a first thimble; 172. a second thimble; 173. a second seal ring; 181. a first detection tank; 182. a second detection tank; 183. detecting a road; 184. a pressure gauge;

2. a gas pressure control device; 21. a gas pressure regulating valve; 22. a controller;

3. a high pressure gas generating apparatus; 31. an inert gas supply source; 32. a high pressure gas reservoir; 33. a gas booster;

4. an injection molding machine nozzle.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

As can be seen from fig. 3 to 12, the lens molding system of the present embodiment includes a lens molding mold 1, a gas pressure control device 2, and a high pressure gas generating device 3;

the lens forming mold 1 comprises a first template 11 and a second template 12; a lens mold cavity 13 is formed between the first mold plate 11 and the second mold plate 12; the second template 12 is provided with a runner 121 communicated with the lens mold cavity 13; the first mold plate 11 is provided with an injection gate 111 for communicating with a runner 121; the second template 12 is provided with a gas channel communicated with a lens mold cavity 13;

the output end of the high-pressure gas generating device 3 is communicated with the gas channel after passing through the gas pressure control device 2.

Specifically, in the lens molding system of the present embodiment, the parameters of the lens molding die 1, the parameters of the gas pressure control device 2, and the parameters of the high-pressure gas generation device 3 are set before mold closing; the parameters are set for gas pressure, gas action time and basic parameters required by the traditional injection molding machine; then, after the parameter setting is finished, the sealing performance is guaranteed, and the die closing process is carried out on the first template 11 and the second template 12; then, inert gas enters the lens mold cavity 13 from the gas channel by controlling the high-pressure gas generating equipment 3 and the gas pressure control equipment 2, so that the rapid pressurization of the gas in the lens mold cavity 13 is realized; when the gas is filled in the lens mold cavity 13, the gas is directly fed back to the gas pressure gauge, when the gas pressure in the lens mold cavity 13 reaches a set value, the pressurization of the lens mold cavity 13 is stopped, and meanwhile, the injection process of the melt is carried out through the injection gate 111 and the flow passage 121; the gas pressure of the lens mold cavity 13 is gradually increased due to the compression of the gas in the melt filling process, and the lens mold cavity 13 is kept in a set constant high pressure state by the gas channel under the control of the gas pressure control device 2; the gas pressure control device 2 sets the pressure maintaining time for the gas action and synchronously sets the pressure maintaining pressure to make up the defect caused by uneven shrinkage of the solution; when the gas action is completed and the pressure maintaining is finished, the high-pressure gas in the lens mold cavity 13 is released and exhausted out of the lens mold cavity 13 through the gas channel in the gas pressure control equipment 2; after the pressure relief is finished, cooling the product in the lens mold cavity 13; then, the first die plate 11 and the second die plate 12 are opened, and the product is ejected.

The gas pressure change in this embodiment through control lens die cavity 13 carries out reverse pressure to the fuse-element flow front edge, improves the pressure on the fuse-element flow front edge among the forming process, suppresses the spring phenomenon of two side upper and lower side fuses to change the melt flow direction, thereby reach the butt fusion angle that changes the joint line and make its realization eliminate the joint line purpose.

As can be seen from fig. 14, in the lens molding system of this embodiment, the gas pressure change in the lens mold cavity 13 is controlled to apply pressure to the flow front of the melt in the reverse direction, so as to increase the pressure at the flow front of the melt during molding, and suppress the spring phenomenon of the melt at the upper and lower sides, thereby changing the flow direction of the melt, and achieving the purpose of changing the welding angle of the joint line and eliminating the joint line.

In the lens molding system of this embodiment, the gas channel includes a first gas path 122 disposed on the second mold plate 12; the second template 12 is provided with an air groove 151; the gas channel further comprises a first gas channel 141 formed between the first mold plate 11 and the second mold plate 12 and communicating with the lens mold cavity 13; the gas passage further includes a second gas passage 142 formed between the first die plate 11 and the gas groove 151 and communicating with the first gas passage 122; the first air passage 141 is communicated with the second air passage 142;

the output end of the high-pressure gas generating device 3 is communicated with the first gas path 122 through the gas pressure control device 2.

Specifically, before mold closing, the lens molding system according to this embodiment first enters high-pressure gas from the first gas passage 122 through the high-pressure gas generating apparatus 3, and enters the lens mold cavity 13 through the second gas passage 142 and the first gas passage 141, so as to realize rapid pressurization of the gas in the lens mold cavity 13; the melt then enters the runner 121 from the injection gate 111 and flows into the lens cavity 13 through the runner 121 to start injection molding; the gas pressure control device 2 controls the lens mold cavity 13 to keep high pressure during injection molding, so that the aim of eliminating a lens combination line can be fulfilled; in addition, on the basis of the efficiency of rapid pressurization or pressure relief of the gas in the lens mold cavity 13, the larger the size design of the air channel is, the higher the efficiency is, but the higher the risk of generating a mantle or an air mark defect at the position of the corresponding air channel of the lens product is. In order to ensure that the molding process is performed smoothly and obtain high-quality products, the first air passage 141 and the second air passage 142 are arranged, so that high air pressure can rapidly reach the inside of the lens mold cavity 13 through the first air passage 141 and the second air passage 142 before the large-area through parting surfaces are filled, and the slit of the first air passage 141 is gradually discharged when the high air pressure enters the lens mold cavity 13 along with the filling of the solution, so that the self-exhausting effect is realized, and the generation of a mantle or an air mark is prevented.

In the lens molding system of this embodiment, the first mold plate 11 is provided with a first insert 112; the second template 12 is provided with a second insert 15; the lens cavity 13 is disposed between the first insert 112 and the second insert 15; the air groove 151 is arranged at the top of the second insert 15; the first air passage 141 is arranged between the first insert 112 and the second insert 15; the second air passage 142 is arranged between the first insert 112 and the air groove 151; specifically, the present embodiment facilitates the user to manufacture different shaped lenses by replacing different second inserts 15 by integrating the lens cavity 13 and the air groove 151 on the second inserts 15.

The first air channel 141 is annularly arranged around the lens mold cavity 13; the second air passage 142 is annularly arranged around the first air passage 141; the cross-sectional width of the second air passage 142 is greater than that of the first air passage 141; through the arrangement, the lens can be further prevented from generating a mantle or an air mark.

The first air passage 122 is arranged in the second template 12; the second template 12 is provided with an air inlet 123 communicated with the first air passage 122; the top of the second template 12 is provided with a linear groove 124; the gas passage further comprises a second gas passage 125 formed between the first die plate 11 and the linear groove 124 and communicating with the first gas passage 122; the second air passage 142 is communicated with the first air passage 122 through a second air passage 125; the output end of the high-pressure gas generating device 3 is communicated with the gas inlet 123 through the gas pressure control device 2. Through the arrangement, the structure of the second template 12 is more compact and reasonable.

One end of the second air passage 125 is communicated with the second air passage 142; the other end of the second air passage 125 is provided with a first sealing ring 161; the second template 12 is provided with a sealing groove 162 for placing a first sealing ring 161; by providing the first seal ring 161, air leakage between the second air passage 125 and the mold can be prevented.

In the lens molding system of this embodiment, the second mold insert 15 is provided with an inlet 152 communicating with the lens cavity 13; one end of the runner 121 is communicated with the gate 152; the other end of the runner 121 is used for communicating with the injection gate 111; the gate 152 is provided with a gate slope 153. Specifically, the gate 152 is disposed on the second insert 15 to facilitate the melt in the runner 121 to enter the lens cavity 13, and the gate slope 153 is disposed to reduce the thickness of the excess material after the lens is molded.

In the lens forming system of this embodiment, the second mold plate 12 is movably provided with a top plate 17; a first ejector pin 171 and a second ejector pin 172 are arranged on the top plate 17; one end of the first thimble 171 is connected with the top plate 17; the other end of the first thimble 171 is movably arranged in the flow passage 121; one end of the second thimble 172 is connected with the top plate 17; the other end of the second thimble 172 is movably arranged in the lens mold cavity 13; second sealing rings 173 are arranged between the first ejector pin 171 and the second template 12 and between the second ejector pin 172 and the second template 12;

specifically, the first ejector pin 171 is used for ejecting the excess material after the lens is molded, and the second ejector pin 172 is used for ejecting the molded lens; the second sealing ring 173 is provided to perform a sealing function. .

The first template 11 is a fixed mould; the second template 12 is a movable template; the fixed die is provided with a guide column 113; the movable mold is provided with a guide groove 126 engaged with the guide post 113. The guide post 113 and the guide groove 126 are provided to facilitate the guiding and positioning of the fixed mold and the movable mold when the molds are closed.

In the lens forming system of this embodiment, a detection groove communicated with the flow channel 121 is disposed at the top of the second mold plate 12; a detection path 183 communicated with the detection groove is arranged in the second template 12; the second template 12 is provided with a pressure gauge 184 communicated with the detection path 183; with the above arrangement, it is possible to facilitate the user to observe the air pressure in the lens cavity 13 through the pressure gauge 184.

The detection grooves comprise a first detection groove 181 and a second detection groove 182; one end of the first detection groove 181 is communicated with the flow passage 121; the other end of the first detection groove 181 is communicated with one end of the second detection groove 182; the other end of the second detection groove 182 is communicated with the detection path 183; the second sensing groove 182 has a sectional width greater than that of the first sensing groove 181. Specifically, the purpose of preventing glue overflow can be achieved by the arrangement of the embodiment.

In the lens molding system of the present embodiment, the high-pressure gas generating apparatus 3 includes an inert gas supply source 31 and a high-pressure gas storage tank 32; the inert gas supply source 31 is connected with the gas pressure control device 2 through a high-pressure gas storage cylinder 32; the high-pressure air storage cylinder 32 is provided with an air supercharger 33;

the inert gas supply source 31 is provided with nitrogen gas therein.

In a lens molding system according to the present embodiment, the gas pressure control device 2 includes a gas pressure regulating valve 21 and a controller 22 for controlling the gas pressure regulating valve 21; the input end of the gas pressure regulating valve 21 is connected with the high-pressure gas generating equipment 3; the output end of the gas pressure regulating valve 21 is connected with a gas channel; the controller 22 is a single chip microcomputer.

The lens molding method of the embodiment includes the following steps:

A. parameter setting step: setting parameters of the lens forming mold 1, parameters of the gas pressure control device 2, and parameters of the high-pressure gas generation device 3; the parameters are set for gas pressure, gas action time and basic parameters required by the traditional injection molding machine;

B. a mold closing step: after the parameter setting is finished, the sealing performance is guaranteed, and the die closing process is carried out on the first template 11 and the second template 12;

C. a pressurization step: the inert gas enters the lens mold cavity 13 from the gas channel by controlling the high-pressure gas generating device 3 and the gas pressure control device 2, so that the rapid pressurization of the gas in the lens mold cavity 13 is realized;

D. filling: when the gas is filled in the lens cavity 13, the gas is directly fed back to the barometer, when the gas pressure in the lens cavity 13 reaches a set value, the pressurization of the lens cavity 13 is stopped, and meanwhile, the injection process of the melt is performed by the nozzle 4 of the external injection machine through the injection gate 111 and the flow passage 121;

E. constant pressure step: because the gas in the lens mold cavity 13 is compressed in the melt filling process, the gas pressure of the original set value is gradually increased, and the lens mold cavity 13 is kept in a set constant high-pressure state by virtue of the gas channel under the control of the gas pressure control equipment 2; when the gas in the lens mold cavity 13 is larger than the set value gas, a pressure stabilizing valve in the gas pressure control device 2 is opened to establish a pressure stabilizing pipeline channel, the gas in the lens mold cavity 13 is discharged out of the lens mold cavity 13 through the gas channel, the pressure stabilizing pipeline and the pressure stabilizing valve, and when the pressure in the lens mold cavity 13 is reduced to the original set range, the gas pressure control device 2 controls the pressure stabilizing valve to be closed; stopping the pressure relief of the lens cavity 13;

F. pressure maintaining step: the gas pressure control device 2 sets the pressure maintaining time for the gas action and synchronously sets the pressure maintaining pressure to make up the defect caused by uneven shrinkage of the solution; because the optical lens requires higher functions and has high requirements on appearance and surface precision, the V/P pressure of the optical lens which is relatively sensitive to the pressure needs to be switched by using the pressure;

G. pressure relief: when the gas action is finished and the pressure maintaining is finished, the high-pressure gas in the lens mold cavity 13 is released and exhausted out of the lens mold cavity 13 through the gas channel in the gas pressure control equipment 2;

H. and (3) cooling: after the pressure relief is finished, cooling a product in the lens mold cavity 13;

I. opening the mold: the first die plate 11 and the second die plate 12 are opened to eject the product.

In step E, the gas pressure control device 2 maintains a constant high pressure on the lens mold cavity 13 through a pressure maintaining valve.

As can be seen from fig. 14, in the lens molding method of this embodiment, the gas pressure change in the lens mold cavity 13 is controlled to apply a reverse pressure to the flow front of the melt, so as to increase the pressure of the flow front of the melt during molding, and suppress the spring phenomenon of the melt on the upper and lower sides, thereby changing the flow direction of the melt, and achieving the purpose of changing the welding angle of the bonding line and eliminating the bonding line.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lens molding system, comprising: comprises a lens forming mould (1), a gas pressure control device (2) and a high-pressure gas generating device (3);

the lens forming mold (1) comprises a first template (11) and a second template (12); a lens cavity (13) is formed between the first template (11) and the second template (12); the second template (12) is provided with a runner (121) communicated with the lens mold cavity (13); the first template (11) is provided with an injection gate (111) communicated with a flow channel (121); the second template (12) is provided with a gas channel communicated with the lens mold cavity (13);

the output end of the high-pressure gas generating equipment (3) is communicated with the gas channel after passing through the gas pressure control equipment (2).

2. A lens forming system according to claim 1, wherein: the gas channel comprises a first gas path (122) arranged on the second template (12); the second template (12) is provided with an air groove (151); the gas channel further comprises a first gas channel (141) formed between the first template (11) and the second template (12) and communicating with the lens mold cavity (13); the gas passage further comprises a second gas passage (142) formed between the first die plate (11) and the gas groove (151) and communicated with the first gas path (122); the first air passage (141) is communicated with the second air passage (142);

the output end of the high-pressure gas generating equipment (3) is communicated with the first gas circuit (122) through the gas pressure control equipment (2).

3. A lens forming system according to claim 2, wherein: the first template (11) is provided with a first insert (112); the second template (12) is provided with a second insert (15); the lens cavity (13) is arranged between the first insert part (112) and the second insert part (15); the air groove (151) is formed in the top of the second insert (15); the first air passage (141) is arranged between the first insert (112) and the second insert (15); the second air channel (142) is arranged between the first insert (112) and the air groove (151);

the first air channel (141) is arranged around the lens mold cavity (13) in a surrounding manner; the second air passage (142) is arranged around the first air passage (141) in a surrounding manner; the cross-sectional width of the second air passage (142) is larger than that of the first air passage (141);

the first air path (122) is arranged in the second template (12); the second template (12) is provided with an air inlet (123) communicated with the first air channel (122); a linear groove (124) is formed in the top of the second template (12); the gas channel further comprises a second gas path (125) formed between the first template (11) and the linear slot (124) and communicating with the first gas path (122); the second air passage (142) is communicated with the first air passage (122) through a second air passage (125);

one end of the second air path (125) is communicated with a second air path (142); the other end of the second air passage (125) is provided with a first sealing ring (161); the second template (12) is provided with a sealing groove (162) for placing a first sealing ring (161);

the output end of the high-pressure gas generating equipment (3) is communicated with the gas inlet (123) through the gas pressure control equipment (2).

4. A lens forming system according to claim 3, wherein: the second insert (15) is provided with an inlet gate (152) communicated with the lens mold cavity (13); one end of the runner (121) is communicated with the gate (152); the other end of the runner (121) is used for being communicated with an injection gate (111); the pouring gate (152) is provided with a pouring inclined surface (153).

5. A lens forming system according to claim 1, wherein: the second template (12) is movably provided with a top plate (17); a first ejector pin (171) and a second ejector pin (172) are arranged on the top plate (17); one end of the first ejector pin (171) is connected with the top plate (17); the other end of the first ejector pin (171) is movably arranged in the flow channel (121);

one end of the second ejector pin (172) is connected with the top plate (17); the other end of the second thimble (172) is movably arranged in the lens mould cavity (13);

second sealing rings (173) are arranged between the first ejector pin (171) and the second template (12) and between the second ejector pin (172) and the second template (12);

the first template (11) is a fixed mould; the second template (12) is a movable template;

the fixed die is provided with a guide column (113); the movable mould is provided with a guide groove (126) matched with the guide post (113).

6. A lens forming system according to claim 1, wherein: the top of the second template (12) is provided with a detection groove communicated with the flow channel (121); a detection path (183) communicated with the detection groove is arranged in the second template (12); the second template (12) is provided with a pressure gauge (184) communicated with the detection path (183);

the detection grooves comprise a first detection groove (181) and a second detection groove (182); one end of the first detection groove (181) is communicated with the flow channel (121); the other end of the first detection groove (181) is communicated with one end of the second detection groove (182); the other end of the second detection groove (182) is communicated with the detection path (183); the second detection groove (182) has a cross-sectional width greater than that of the first detection groove (181).

7. A lens forming system according to claim 1, wherein: the high-pressure gas generating equipment (3) comprises an inert gas supply source (31) and a high-pressure gas storage cylinder (32); the inert gas supply source (31) is connected with the gas pressure control equipment (2) through a high-pressure gas storage cylinder (32); the high-pressure air storage cylinder (32) is provided with an air supercharger (33);

the inert gas supply source (31) is internally provided with nitrogen.

8. A lens forming system according to claim 1, wherein: the gas pressure control device (2) comprises a gas pressure regulating valve (21) and a controller (22) for controlling the gas pressure regulating valve (21); the input end of the gas pressure regulating valve (21) is connected with high-pressure gas generating equipment (3); the output end of the gas pressure regulating valve (21) is connected with a gas channel; the controller (22) is a single chip microcomputer.

9. A method of forming a lens, comprising: comprising the lens molding system of any one of claims 1-8; further comprising the steps of:

A. parameter setting step: setting parameters of a lens forming mold (1), parameters of a gas pressure control device (2) and parameters of a high-pressure gas generation device (3);

B. a mold closing step: carrying out mold closing operation on a first mold plate (11) and a second mold plate (12);

C. a pressurization step: the high-pressure gas generating device (3) and the gas pressure control device (2) are controlled to enable inert gas to enter the lens mold cavity (13) from the gas channel, so that the rapid pressurization of the gas in the lens mold cavity (13) is realized;

D. filling: when the gas pressure of the lens mold cavity (13) reaches a set value, the pressurization of the lens mold cavity (13) is stopped, and the injection process of the melt is carried out through the injection gate (111) and the flow channel (121);

E. constant pressure step: the lens mold cavity (13) is kept in a set constant high pressure state through the control of the gas pressure control device (2) by a gas channel;

F. pressure maintaining step: the gas pressure control device (2) sets the pressure maintaining time for the gas action and synchronously sets the pressure maintaining pressure to make up the defect caused by uneven shrinkage of the solution;

G. pressure relief: when the gas action is finished and the pressure maintaining is finished, high-pressure gas in the lens mold cavity (13) is discharged out of the lens mold cavity (13) in a pressure relief mode through the gas channel in the gas pressure control equipment (2);

H. and (3) cooling: after the pressure relief is finished, cooling a product in the lens mold cavity (13);

I. opening the mold: and opening the first template (11) and the second template (12) so as to eject the product.

10. A method of molding a lens according to claim 9, wherein: in step E, the gas pressure control device (2) maintains a constant high pressure on the lens mold cavity (13) through a pressure maintaining valve.