TW202122254A - Lens forming system and forming method thereof - Google Patents

Abstract

The invention relates to the technical field of optical lens manufacturing, in particular to a lens forming system and a forming method thereof. The lens forming system comprises a lens forming mold, a gas pressure control device and a high-pressure gas generating device. The lens forming mold comprises a first mold plate and a second mold plate, a lens mold cavity is formed between the first mold plate and the second mold plate, and the second mold plate is provided with a runner communicating with the lens mold cavity. The first mold plate is provided with a pouring gate for communicating with the runner; the second mold plate is provided with a gas channel communicating with the lens mold cavity; and the output end of the high-pressure gas generating device communicates with the gas channel through the gas pressure control device. According to the system, by controlling the pressure change of gas in the lens mold cavity to conduct reverse pressure application on the flow front of melt, the pressure of the flow front of the melt in the forming process is improved, and the gush phenomenon of the melt on the upper and lower sides is suppressed, so that the melt flow direction is changed, and the bonding angle of a joint line is changed to eliminate the joint line.

Description

Lens molding system and molding method thereof

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

In recent years, with the vigorous development of the mobile electronics industry such as the smart phone industry, the demand for camera lenses installed in them has continued to increase, which in turn has driven the development of the optical lens manufacturing industry. The demand for optical lenses has continued to increase. Lens productivity and quality have become important issues to be solved.

The current optical lenses mainly use plastic materials, and the traditional optical lenses are injection molded through the CIM process; as shown in Figure 1 and Figure 2, during the manufacturing process of the lens, the depth of the middle of the mold cavity is greater than the surrounding (the edge of the product). The thickness of the flesh is greater than the thickness of the central flesh), so the flow of the melt is shown in Figure 1. When the upper and lower sides of the melt are combined, a junction line A as shown in Figure 2 will be formed at the junction. The junction line A is greatly Affected the quality of optical lenses.

In the traditional injection molding process, the melt at the front of the lens mold cavity can be regarded as a free-flowing state, the melt pressure at the front is almost zero, and the wall thickness of the product directly affects the flow of the melt at the front, as shown in Figure 1. Therefore, at present, under the characteristics of the convex-concave structure of the optical white lens, the bonding line generated during injection molding must exist. The current process trial adjustment methods for the injection molding product bonding line are mostly by increasing the material temperature, mold temperature, and increasing injection pressure. Flow to weaken the visual sense of the bonding line, the process method used is relatively simple and not very versatile, and it is fundamentally impossible to eliminate the bonding line.

The purpose of the present invention is to provide a lens molding system and a molding method for the above-mentioned shortcomings in the prior art, so as to eliminate the joint line of the lens.

The objective of the present invention is achieved by the following technical solutions: a lens forming system, including a lens forming mold, a gas pressure control device, and a high-pressure gas generating device;

The lens forming mold includes a first mold plate and a second mold plate; a lens mold cavity is formed between the first mold plate and the second mold plate; the second mold plate is provided with a flow channel communicating with the lens mold cavity; A template is provided with a pouring port for communicating with the flow channel; the second template is provided with a gas channel communicating with the lens mold cavity;

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

The present invention is further provided that the gas channel includes a first gas path provided on the second template; the second template is provided with a gas groove; the gas channel further includes a gas channel formed between the first template and the second template; A first air passage communicating with the lens mold cavity; the gas passage further includes a second air passage formed between the first template and the air groove and communicating with the first air passage; the first air passage is communicated with the second air passage;

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

The present invention further provides that the first template is provided with a first insert; the second template is provided with a second insert; the lens cavity is provided between the first insert and the second insert; The air groove is arranged on 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 passage is arranged around the lens mold cavity; the second air passage is arranged around the first air passage; the cross-sectional width of the second air passage is greater than the cross-sectional width of the first air passage;

The first gas path is provided in the second template; the second template is provided with an air inlet communicating with the first gas path; the top of the second template is provided with a linear groove; the gas channel also includes A second air path formed between the first template and the linear groove and communicated with the first air path; the second air path communicates with the first air path through the second air path;

One end of the second air path is connected to the second air path; 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 the first sealing ring;

The output end of the high-pressure gas generating device is communicated with the air inlet after passing through the gas pressure control device.

The present invention is further provided that the second insert is provided with a gate communicating with the lens mold cavity; one end of the runner is connected with the gate; the other end of the runner is used for communicating with the gate ; The gate is provided with a pouring inclined surface.

The present invention is further provided that the second template is movably provided with a top plate; the top plate is provided with a first thimble and a second thimble; one end of the first thimble is connected to the top plate; the other end of the first thimble is movable Located in the flow channel;

One end of the second thimble is connected to the top plate; the other end of the second thimble is movably arranged in the lens mold cavity;

A second sealing ring is provided between the first thimble and the second template and between the second thimble and the second template;

The first template is a fixed mold; the second template is a movable mold;

The fixed mold is provided with a guide post; the movable mold is provided with a guide groove matched with the guide post. The present invention is further provided that the top of the second template is provided with a detection groove communicating with the flow channel; the second template is provided with a detection path communicating with the detection groove; the second template is provided with a detection path communicating with the detection path Pressure gauge

The detection groove includes a first detection groove and a second detection groove; one end of the first detection groove communicates with the flow channel; the other end of the first detection groove communicates with one end of the second detection groove; The other end of the detecting groove is connected with the detecting path; the cross-sectional width of the second detecting groove is larger than the cross-sectional width of the first detecting groove.

The present invention further provides that the high-pressure gas generating equipment includes an inert gas supply source and a high-pressure accumulator; the inert gas supply source is connected to the gas pressure control device through the high-pressure accumulator; the high-pressure accumulator is provided with a gas booster ；

Nitrogen is provided in the inert gas supply source.

The present invention further provides that the gas pressure control device includes 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 to a high-pressure gas generating device; the gas pressure regulating valve The output end of the valve is connected with the gas channel; the controller is a single-chip microcomputer.

A lens forming method includes the following steps:

A. Parameter setting steps: set the parameters of the lens forming mold, the parameters of the gas pressure control equipment, and the parameters of the high-pressure gas generating equipment;

B. Mold clamping step: perform a mold clamping operation on the first template and the second template;

C. Pressurization step: by controlling the high-pressure gas generating equipment and gas pressure control equipment, the inert gas enters the lens cavity from the gas channel to realize the rapid pressurization of the lens cavity gas;

D. Filling step: When the gas pressure of the lens cavity reaches the set value, the pressure of the lens cavity will be stopped, and the melt injection process will be carried out through the injection gate and runner at the same time;

E. Constant pressure step: Controlled by gas pressure control equipment, through the gas channel to keep the lens mold cavity at a set constant high pressure state;

F. Pressure-holding steps: the gas pressure control equipment sets the pressure-holding time for the gas action and the pressure-holding pressure is set simultaneously to compensate for the defects caused by uneven shrinkage of the solution;

G. Pressure relief step: When the gas action is completed and the pressure holding is completed, the high-pressure gas in the lens cavity is discharged out of the lens cavity through the gas pressure control device through the gas channel;

H. Cooling step: After the pressure is relieved, the product in the lens cavity is cooled;

I. Mold opening step: mold the first template and the second template to eject the product.

The present invention is further provided that, in step E, the gas pressure control device maintains a constant high pressure on the lens mold cavity through a stabilizing valve.

The beneficial effects of the present invention: the present invention reversely pressurizes the melt flow front by controlling the gas pressure change in the lens mold cavity, increases the pressure of the melt flow front during the molding process, and suppresses the surge phenomenon of the upper and lower melts. Thereby changing the flow direction of the melt, so as to achieve the purpose of changing the welding angle of the bonding line to eliminate the bonding line.

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

It can be seen from FIGS. 3 to 12 that the lens forming system described in this embodiment includes a lens forming mold 1, a gas pressure control device 2 and a high-pressure gas generating device 3;

The lens forming mold 1 includes a first template 11 and a second template 12; a lens mold cavity 13 is formed between the first template 11 and the second template 12; the second template 12 is provided with a lens mold cavity 13 A communicating flow channel 121; the first template 11 is provided with a pouring port 111 for communicating with the flow channel 121; the second template 12 is provided with a gas channel communicating with the lens cavity 13;

The output end of the high-pressure gas generating device 3 passes through the gas pressure control device 2 and then communicates with the gas channel.

Specifically, in the lens molding system of this embodiment, the parameters of the lens molding mold 1, the parameters of the gas pressure control device 2, and the parameters of the high-pressure gas generating device 3 are set before the mold clamping; the parameters are gas pressure and gas effect Time and basic parameter setting required for traditional injection molding machine; then after the parameter setting is completed, the sealing is ensured, and the mold clamping process is performed on the first template 11 and the second template 12; then by controlling the high-pressure gas generating device 3 and the gas pressure The control device 2 makes the inert gas enter the lens cavity 13 from the gas channel to realize the rapid pressurization of the gas of the lens cavity 13; when the gas is filled into the lens cavity 13, it directly feeds back to the barometer, and when the gas pressure of the lens cavity 13 reaches the setting When the value is set, the pressurization of the lens cavity 13 will be stopped, and the melt injection process will be carried out through the pouring gate 111 and the runner 121; however, since the gas in the lens cavity 13 is compressed during the melt filling process, the original set value of gas pressure Will be gradually increased, controlled by the gas pressure control device 2, through the gas channel to keep the lens mold cavity 13 at a constant high pressure state; the gas pressure control device 2 sets the pressure holding time for the gas action and the pressure holding pressure is set to compensate for the solution. Uneven shrinkage causes defects; when the gas action is completed and the pressure holding is completed, the high-pressure gas in the lens mold cavity 13 is discharged to the outside of the lens mold cavity 13 through the gas channel in the gas pressure control device 2; after the pressure relief is completed, The product in the lens cavity 13 is cooled; then the first template 11 and the second template 12 are opened to eject the product.

In this embodiment, by controlling the gas pressure change in the lens cavity 13 to reversely pressurize the melt flow front, the pressure at the melt flow front during the molding process is increased, and the surge of the upper and lower melts is suppressed, thereby changing the melt. Flow direction, so as to achieve the purpose of changing the welding angle of the bonding line to eliminate the bonding line.

It can be seen from FIG. 14 that the lens molding system of this embodiment controls the gas pressure change in the lens cavity 13 to reversely pressurize the melt flow front to improve the melt flow front during the molding process. The pressure suppresses the springing phenomenon of the upper and lower sides of the melt, thereby changing the direction of the melt flow, so as to achieve the purpose of changing the welding angle of the bonding line and eliminating the bonding line.

In the lens molding system of this embodiment, the gas channel includes a first gas path 122 provided on the second template 12; the second template 12 is provided with an air groove 151; the gas channel also includes a first gas path 122 A first air passage 141 formed between the template 11 and the second template 12 and communicated with the lens cavity 13; the gas passage further includes a first air passage 141 formed between the first template 11 and the air groove 151 and communicated with the first air passage 122 The second airway 142; the first airway 141 communicates with the second airway 142;

The output end of the high-pressure gas generating device 3 is in communication with the first gas path 122 after passing through the gas pressure control device 2.

Specifically, in the lens molding system of this embodiment, before the mold is closed, the high-pressure gas is first introduced from the first gas path 122 through the high-pressure gas generating device 3, and enters after passing through the second air path 142 and the first air path 141 Into the lens cavity 13, the gas in the lens cavity 13 is rapidly pressurized; then the melt enters the runner 121 from the pouring gate 111, and flows into the lens cavity 13 through the runner 121 to start injection molding; During molding, the gas pressure control device 2 controls the lens mold cavity 13 to maintain high pressure, so as to eliminate the lens bonding line; in addition, in terms of the rapid gas pressure or pressure relief efficiency of the lens mold cavity 13, the larger the airway size design is in principle Larger, higher efficiency, but the higher the risk of cloak or air mark defects caused by the position of the lens product corresponding to the airway. In order to ensure the smooth progress of the molding process and obtain high-quality products, in this embodiment, the first air passage 141 and the second air passage 142 are provided. Due to the large penetrating parting surface area, the high pressure passes through the first air passage 141 and the second air passage before filling. 142 quickly reaches the inside of the lens mold cavity 13, and when the melt is filled into the lens mold cavity 13, it is gradually discharged by the slit of the first air passage 141, which plays a role of self-exhausting, thereby preventing the generation of cloaks or air marks.

In the lens molding system of this embodiment, the first template 11 is provided with a first insert 112; the second template 12 is provided with a second insert 15; the lens mold cavity 13 is provided on the first insert 112; Between the first insert 112 and the second insert 15; the air groove 151 is arranged on 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 provided between the first insert 112 and the air groove 151; specifically, this embodiment integrates the lens mold cavity 13 and the air groove 151 on the second insert 15, so as to facilitate the user to replace different The second insert 15 thus produces lenses of different shapes. The first air passage 141 is arranged around the lens mold cavity 13; the second air passage 142 is arranged around the first air passage 141; the cross-sectional width of the second air passage 142 is greater than the cross-sectional width of the first air passage 141; The above arrangement can further prevent the lens from producing cloaks or air marks.

The first gas path 122 is provided in the second template 12; the second template 12 is provided with an air inlet 123 communicating with the first gas path 122; the top of the second template 12 is provided with a linear groove 124; The gas passage further includes a second gas passage 125 formed between the first template 11 and the linear groove 124 and communicating with the first gas passage 122; the second gas passage 142 is connected to the first gas passage 125 through the second gas passage 125 The gas path 122 is connected; the output end of the high-pressure gas generating device 3 is connected to the air inlet 123 after passing through the gas pressure control device 2. Through the above arrangement, the structure of the second template 12 is made more compact and reasonable.

One end of the second air path 125 is in communication with the second air path 142; the other end of the second air path 125 is provided with a first sealing ring 161; the second template 12 is provided with a first sealing ring 161 Sealing groove 162; by providing the first sealing ring 161, air leakage between the second air path 125 and the mold can be prevented.

In the lens molding system of this embodiment, the second insert 15 is provided with a gate 152 communicating with the lens cavity 13; one end of the runner 121 is connected with the gate 152; the runner The other end of 121 is used to communicate with the pouring port 111; the pouring port 152 is provided with a pouring inclined surface 153. Specifically, the second insert 15 is provided with a gate 152 to facilitate the melt in the runner 121 to enter the lens mold cavity 13, and the thickness of the remaining material after the lens is formed can be reduced by setting the pouring bevel 153.

In the lens molding system of this embodiment, the second template 12 is movably provided with a top plate 17; the top plate 17 is provided with a first thimble 171 and a second thimble 172; one end of the first thimble 171 and the top plate 17 is connected; the other end of the first thimble 171 is movably arranged in the flow channel 121; one end of the second thimble 172 is connected to the top plate 17; the other end of the second thimble 172 is movably arranged in the lens mold cavity 13; A second sealing ring 173 is provided between the first thimble 171 and the second template 12 and between the second thimble 172 and the second template 12;

Specifically, the first ejector pin 171 is used to eject the remaining material after the lens is molded, and the second ejector pin 172 is used to eject the molded lens; the second sealing ring 173 is provided to play the role of sealing.

The first mold plate 11 is a fixed mold; the second mold plate 12 is a movable mold; the fixed mold is provided with a guide post 113; the movable mold is provided with a guide groove 126 that cooperates with the guide post 113. By providing the guide post 113 and the guide groove 126, it is convenient to guide and position the fixed mold and the movable mold during mold clamping.

In the lens molding system of this embodiment, the top of the second template 12 is provided with a detection groove communicating with the flow channel 121; the second template 12 is provided with a detection path 183 communicating with the detection groove; The second template 12 is provided with a pressure gauge 184 communicating with the detection path 183; through the above arrangement, it is convenient for the user to observe the air pressure in the lens cavity 13 through the pressure gauge 184.

The detection groove includes a first detection groove 181 and a second detection groove 182; one end of the first detection groove 181 communicates with the flow channel 121; the other end of the first detection groove 181 and one end of the second detection groove 182 Connected; the other end of the second detection groove 182 communicates with the detection path 183; the cross-sectional width of the second detection groove 182 is greater than the cross-sectional width of the first detection groove 181. Specifically, this embodiment can achieve the purpose of preventing glue overflow through the above arrangement.

In the lens molding system of this embodiment, the high-pressure gas generating device 3 includes an inert gas supply source 31 and a high-pressure accumulator 32; the inert gas supply source 31 is connected to the gas pressure control device 2 through the high-pressure accumulator 32; The high-pressure accumulator 32 is provided with a gas supercharger 33;

The inert gas supply source 31 is provided with nitrogen gas.

In the lens molding system of this 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 to the high pressure The gas generating device 3 is connected; the output end of the gas pressure regulating valve 21 is connected to the gas channel; the controller 22 is a single-chip microcomputer.

The lens forming method described in this embodiment includes the following steps:

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

B. Mold clamping step: After the parameter setting is completed, the tightness is ensured, and the mold clamping process is performed on the first template 11 and the second template 12;

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

D. Filling step: When the gas is filled into the lens cavity 13, it will be directly fed back to the barometer. When the gas pressure of the lens cavity 13 reaches the set value, the pressure of the lens cavity 13 will be stopped, and the external injection machine nozzle 4 will pass the injection The gate 111 and the runner 121 perform the melt injection process;

E. Constant pressure step: As the gas in the lens cavity 13 is compressed during the melt filling process, the original set value gas pressure will gradually increase. It is controlled by the gas pressure control device 2, and the lens cavity 13 is kept set through the gas channel. When the gas in the lens mold cavity 13 is greater than the set value, the pressure regulator valve in the gas pressure control device 2 is opened to establish a pressure regulator pipeline channel, and the gas in the lens mold cavity 13 passes through the gas channel and the pressure regulator tube When the pressure of the lens mold cavity 13 drops to the original setting range, the gas pressure control device 2 controls the pressure regulator valve to close; stop the lens mold cavity 13 to relieve pressure;

F. Pressure holding step: The gas pressure control device 2 sets the holding time for gas action and sets the holding pressure synchronously to make up for the defects caused by uneven shrinkage of the solution; due to the higher functions of the optical lens, the requirements for appearance and surface accuracy are high. Therefore, the V/P pressure of the optical lens, which is relatively sensitive to pressure, needs to be switched by pressure;

G. Pressure relief step: When the gas action is completed and the pressure holding is completed, the high-pressure gas in the lens mold cavity 13 is relieved and discharged out of the lens mold cavity 13 through the gas channel in the gas pressure control device 2;

H. Cooling step: After the pressure is relieved, the product in the lens mold cavity 13 is cooled;

I. Mold opening step: mold the first template 11 and the second template 12 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 stabilizing valve.

It can be seen from FIG. 14 that the lens molding method of this embodiment controls the gas pressure change in the lens mold cavity 13 to reversely press the melt flow front to increase the melt flow front during the molding process. The pressure suppresses the springing phenomenon of the upper and lower sides of the melt, thereby changing the direction of the melt flow, so as to achieve 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 to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand The technical solution of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the present invention.

1: Lens forming mold 11: The first template 111: pouring gate 112: The first insert 113: Guiding Post 12: The second template 121: Runner 122: First Air Path 123: air inlet 124: straight groove 125: Second Air Path 126: Guide groove 13: Lens cavity 141: First Airway 142: Second Airway 15: The second insert 151: Air Groove 152: Inlet 153: Pouring slope 161: The first sealing ring 162: Seal groove 17: Top plate 171: The first thimble 172: second thimble 173: second sealing ring 181: first detection slot 182: second detection slot 183: Detection Road 184: Pressure gauge 2: Gas pressure control equipment 21: Gas pressure regulator 22: Controller 3: High-pressure gas generating equipment 31: Inert gas supply source 32: High pressure accumulator 33: Gas booster 4: Nozzle of injection machine

[Figure 1] is a diagram of the optical lens molding process of the traditional CIM process; [Figure 2] is a schematic diagram of the structure of a traditional optical lens; [Figure 3] is a schematic diagram of the structure of the present invention during pressurization; [Figure 4] is a schematic diagram of the structure of the present invention when maintaining a constant high pressure; [Figure 5] is a schematic diagram of the structure of the present invention when the pressure is relieved; [Figure 6] is a schematic diagram of the structure of the lens forming mold of the present invention; [Figure 7] is an exploded view of the structure of the lens forming mold of the present invention; [Figure 8] is a schematic diagram of the structure of the second template of the present invention; [Figure 9] is a schematic view of the structure of the second insert of the present invention; [Fig. 10] is a cross-sectional view of the lens forming mold of the present invention; [Figure 11] is an exploded view of the structure of the first insert and the second insert of the present invention; [Fig. 12] is a partial enlarged view of part A in Fig. 10; [Fig. 13] is a partial enlarged view of part B in Fig. 11; [Figure 14] is a diagram of the molding process of the optical lens of the present invention;

1: Forming mold

11: The first template

12: The second template

123: air inlet

2: Gas pressure control equipment

21: Gas pressure regulator

22: Controller

3: High-pressure gas generating equipment

31: Inert gas supply source

32: High pressure accumulator

33: Gas booster

4: Nozzle of injection machine

Claims (10)

A lens forming system, characterized in that it includes a lens forming mold, a gas pressure control device, and a high-pressure gas generating device; 　　 the lens forming mold includes a first template and a second template; the first template and the second template are formed There is a lens cavity; The second template is provided with a flow channel communicating with the lens mold cavity; the first template is provided with a pouring port for communicating with the flow channel; the second template is provided with a gas channel communicating with the lens mold cavity; 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). The lens forming system according to the first item of the scope of patent application, wherein the gas channel includes a first gas path provided on the second template; The second template is provided with an air groove; the gas passage further includes a first air passage formed between the first template and the second template and communicated with the lens cavity; The gas passage further includes a second gas passage formed between the first template and the gas groove and communicated with the first gas path; the first gas passage is communicated with the second gas passage; the output end of the high-pressure gas generating device passes through the gas The pressure control device is connected with the first gas path. As described in the second item of the scope of patent application, a lens molding system, wherein the first template is provided with a first insert; the second template is provided with a second insert; the lens mold cavity is provided on the first Between the insert and the second insert; the air groove is arranged on 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 on the first insert Between an insert and the air groove; The first air passage is arranged around the lens mold cavity; the second air passage is arranged around the first air passage; the cross-sectional width of the second air passage is greater than the cross-sectional width of the first air passage (141); The first gas path is provided in the second template; the second template is provided with an air inlet communicating with the first gas path; the top of the second template is provided with a linear groove; the gas channel also includes A second air path formed between the first template and the linear groove and communicated with the first air path; the second air path communicates with the first air path through the second air path; One end of the second air path is connected to the second air path; the other end of the second air path is provided with a first sealing ring; the second template (with a sealing groove for placing the first sealing ring; The output end of the high-pressure gas generating device is communicated with the air inlet after passing through the gas pressure control device. A lens molding system as described in item 3 of the scope of patent application, wherein the second insert is provided with a gate communicating with the lens cavity; one end of the runner is connected with the gate; the flow The other end of the channel is used to communicate with the pouring port; the pouring port is provided with a pouring inclined surface. A lens forming system as described in item 1 of the scope of patent application, wherein the second template is movably provided with a top plate; A first thimble and a second thimble are provided on the top plate; One end of the first thimble is connected to the top plate; the other end of the first thimble is movably arranged in the flow channel; One end of the second thimble is connected to the top plate; the other end of the second thimble is movably arranged in the lens mold cavity; A second sealing ring is provided between the first thimble and the second template and between the second thimble and the second template; The first template is a fixed mold; the second template is a movable mold; The fixed mold is provided with a guide post; the movable mold is provided with a guide groove matched with the guide post. A lens molding system as described in item 1 of the scope of patent application, wherein the top of the second template is provided with a detection groove communicating with the flow channel; The second template is provided with a detection path communicating with the detection groove; The second template is provided with a pressure gauge communicating with the detection path; The detection slot includes a first detection slot and a second detection slot; 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 connected to the detection path; The cross-sectional width of the second detection groove is greater than the cross-sectional width of the first detection groove. A lens forming system as described in item 1 of the scope of patent application, wherein the high-pressure gas generating equipment includes an inert gas supply source and a high-pressure storage cylinder; The inert gas supply source is connected to a gas pressure control device through a high-pressure storage cylinder; The high-pressure accumulator is provided with a gas supercharger; Nitrogen is provided in the inert gas supply source. A lens forming system as described in item 1 of the scope of patent application, wherein the gas pressure control device includes 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 a high-pressure gas generating device; The output end of the gas pressure regulating valve is connected with the gas channel; the controller is a single-chip microcomputer. A lens forming method, characterized in that it comprises the lens forming system described in any one of items 1-8 in the scope of patent application; and further comprises the following steps: A. Parameter setting steps: set the parameters of the lens forming mold, the parameters of the gas pressure control equipment, and the parameters of the high-pressure gas generating equipment; B. Mold clamping step: perform a mold clamping operation on the first template and the second template; C. Pressurization step: by controlling the high-pressure gas generating equipment and gas pressure control equipment, the inert gas enters the lens cavity from the gas channel to realize the rapid pressurization of the lens cavity gas; D. Filling step: When the gas pressure of the lens cavity reaches the set value, the pressure of the lens cavity will be stopped, and the melt injection process will be carried out through the injection gate and runner at the same time; E. Constant pressure step: controlled by a gas pressure control device, the lens mold cavity (13) is maintained at a set constant high pressure state through the gas channel; F. Pressure-holding steps: the gas pressure control equipment sets the pressure-holding time for the gas action and the pressure-holding pressure is set simultaneously to compensate for the defects caused by the uneven shrinkage of the solution; G. Pressure relief step: When the gas action is completed and the pressure holding is completed, the high-pressure gas in the lens cavity is discharged out of the lens cavity through the gas pressure control device through the gas channel; H. Cooling step: After the pressure is relieved, the product in the lens cavity is cooled; I. Mold opening step: mold the first template and the second template to eject the product. A lens molding method described in item 9 of the scope of patent application, wherein, in step E, the gas pressure control device maintains a constant high pressure on the lens mold cavity through a pressure regulator valve.

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