Three-station glass aspheric surface mold pressing processing method

Abstract

The invention relates to a three-station glass aspheric surface mould pressing processing method which is implemented based on a three-station glass aspheric surface mould pressing machine, and a glass pre-forming material is sequentially subjected to a preheating stage, a forming stage and a cooling stage in the same station; in the preheating stage, the upper vapor chamber and the lower vapor chamber are respectively heated to 420-440 DEG C within 560-700 seconds; in the forming stage, the upper vapor chamber and the lower vapor chamber are kept at 420-440 DEG C respectively, the pressure is increased by 833-1250 kgf for press cutting, and the time of the forming stage is 1100-3000 s; and in the cooling stage, the upper vapor chamber and the lower vapor chamber are cooled to 350-365 DEG C within 280-320 s. According to the method, the non-fog and non-crack aspheric glass lens can be prepared on the three-station glass aspheric molding press, and the yield is high.

Description

Technical Field

[0001] The present invention relates to the technical field of glass processing, and in particular to a three-station glass aspheric surface molding processing method. Background Art

[0002] Aspheric glass lenses offer excellent optical properties, effectively reducing optical aberrations and improving image quality. They are commonly used in cameras, radars, telescopes, microscopes, optical metrology, and other fields. Aspheric glass lenses are typically produced by heating a glass preform, such as the M-FCD1, to near its softening point in a precision-machined aspheric mold. Pressure is applied to the preform to cause deformation, and the desired material is obtained after cooling.

[0003] An existing three-station glass aspheric molding machine is as follows Figure 1 As shown, the machine includes a first processing module 2, a second processing module 3, a third processing module 4, a mold shifting platform 5, and a mold shifting module 6, which are arranged on a machine body 1. The first processing module 2, the second processing module 3, and the third processing module 4 are interconnected. The mold shifting platform 5 is used to support the mold with the glass preform material placed on it. The mold shifting module 6 is used to move the mold to the first processing module 2, the second processing module 3, and the third processing module 4 in sequence. The first processing module 2 is used for pretreatment, such as nitrogen filling. The second processing module 3 is used to heat and pressurize the lens. The third processing module 4 is used to cool the mold and lens before discharging. The detailed structure of this three-station glass aspheric molding machine can be referred to the description in CN222498965U.

[0004] In the process of heating and pressing the aspheric glass surface, if the temperature and pressure and other process conditions are not properly controlled, the optical performance of the aspheric glass lens will be affected, such as Figure 2 As shown in Figure 1, aspheric glass lenses may experience problems such as cracking, heavy fog and light fog. Therefore, the three-station glass aspheric molding process is crucial to improving the quality of glass lenses and increasing the yield rate. Figure 1 In the three-station glass aspheric molding machine shown, heating and pressurizing of the glass preform material are completed at the same station of the second processing module 3. The second processing module 3 is a molding station, and its temperature and pressure control is particularly critical. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a three-station glass aspheric molding processing method, which can produce fog-free and crack-free aspheric glass lenses on a three-station glass aspheric molding machine with a high yield.

[0006] To achieve the purpose of the present invention, the present invention provides a three-station glass aspheric surface molding method, which is implemented based on a three-station glass aspheric surface molding machine. The three-station glass aspheric surface molding machine includes a first processing module, a second processing module, and a third processing module that are connected in sequence. The first processing module and the third processing module do not have a heating function, the second processing module has a heating and pressurizing function, and the second processing module includes an upper heat spreader and a lower heat spreader; the three-station glass aspheric surface molding method includes: passing a mold with a glass preform material through the first processing module, the second processing module, and the third processing module in sequence; the mold is placed in the second processing module. When in the processing module, the mold is clamped between the upper heat spreader and the lower heat spreader, and the glass preform material undergoes a preheating stage, a forming stage and a cooling stage in sequence; in the preheating stage, the upper heat spreader and the lower heat spreader are heated to 420°C to 440°C within 560s to 700s respectively; in the forming stage, the upper heat spreader and the lower heat spreader are maintained at 420°C to 440°C respectively, and the pressure is increased by 833kgf to 1250kgf for press cutting, and the time of the forming stage is 1100 to 3000s; in the cooling stage, the upper heat spreader and the lower heat spreader are cooled to 350°C to 365°C within 280s to 320s.

[0007] In some embodiments of the present invention, the glass preform material is M-FCD1.

[0008] In some embodiments of the present invention, the yield point of the glass preform material is 427°C.

[0009] In some embodiments of the present invention, the softening point of the glass preform material is 513°C.

[0010] In some embodiments of the present invention, the thickness of the glass preform material is 5 mm to 7 mm.

[0011] In some embodiments of the present invention, the third processing module includes a cooling plate, and the temperature of the cooling plate is 15-25°C.

[0012] In some embodiments of the present invention, the three-station glass aspheric surface molding method further includes: after the cooling stage, moving the mold to the third processing module for rapid cooling.

[0013] In some embodiments of the present invention, the first processing module and the third processing module are respectively provided with a sealed box and an inflation and exhaust device connected to the sealed box, the sealed box is connected to the inner cavity of the second processing module and can remain closed with the inner cavity, and the mold can move within the sealed box and the inner cavity; the inflation and exhaust device is used to fill nitrogen into the sealed box and the inner cavity and discharge air.

[0014] In some embodiments of the present invention, the three-station glass aspheric molding machine also includes a feeding device, a discharging device and a shift module. The feeding device is used to place the mold into the sealed box of the first processing module, the discharging device is used to take the mold out of the sealed box of the third processing module, and the shift module is used to move the mold in the sealed box of the first processing module, the inner cavity of the second processing module and the sealed box of the third processing module.

[0015] In some embodiments of the present invention, during the preheating stage, the upper and lower vapor chambers are first cooled to 300°C to 330°C within 30s to 40s, then heated from 300°C to 330°C to 370°C within 60s to 130s, and then heated from 370°C to 420°C to 440°C within 400s to 550s.

[0016] In some embodiments of the present invention, when the mold is a newly opened mold or a mold that has completed maintenance, the mold is first left empty and passes through the first processing module, the second processing module and the third processing module in sequence. When the mold is in the second processing module, the mold is clamped between the upper heat spreader and the lower heat spreader. The upper heat spreader and the lower heat spreader are used to perform empty burning of the mold according to the temperature control of the preheating stage, the molding stage and the cooling stage.

[0017] In some embodiments of the present invention, the total time for the mold to move between two adjacent ones of the first processing module, the second processing module, and the third processing module is 10s to 15s.

[0018] In some embodiments of the present invention, during the preheating stage, the upper vapor chamber is in contact with the mold, or not in contact with the mold, or not in contact with the mold first and then in contact with the mold; during the molding stage and the cooling stage, the upper vapor chamber is in contact with the mold.

[0019] In some embodiments of the present invention, the upper vapor chamber and the lower vapor chamber are in contact with an electric heating device and a water cooling device, respectively.

[0020] In some embodiments of the present invention, the temperature difference between the upper vapor chamber and the lower vapor chamber is between 0° C. and 15° C.

[0021] In some embodiments of the present invention, there are at least two sets of molds, one set of the molds is in the second processing module, and the other set of the molds is in the third processing module.

[0022] In some embodiments of the present invention, there are at least three sets of molds, and while two sets of the molds are being processed in the three-station glass aspheric molding machine, the other set of molds is used to take out the finished lens or place the glass preform material.

[0023] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0024] The three-station glass aspheric molding processing method of the present invention can mold qualified aspheric glass lens products on a three-station glass aspheric molding machine. Since the preheating, molding, and cooling of the three-station glass aspheric molding machine are all performed at the same station, the process conditions required are more stringent than those of conventional equipment. The processing method of the present invention precisely controls time, temperature, and pressure, and the resulting aspheric glass lens has no cracks, heavy fog, or light fog, and has excellent optical properties, a high yield, and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of a three-station glass aspheric molding machine.

[0026] Figure 2 These are the problems that exist in glass aspheric molded products, among which (a) is cracking, (b) is heavy fog, and (c) is light fog.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0028] The embodiment of the present invention provides a three-station glass aspheric surface molding method, which is implemented based on a three-station glass aspheric surface molding machine. The structure of the three-station glass aspheric surface molding machine is as follows: Figure 1 As shown, the three-station glass aspheric surface molding machine includes a first processing module 2, a second processing module 3, and a third processing module 4, which are connected in sequence. The first processing module 2 and the third processing module 3 do not have heating functions, while the second processing module 3 has heating and pressurizing functions. The second processing module includes an upper and a lower vapor chamber, which are arranged in a vertically opposed relationship to transfer heat and implement heating. The specific structure of the three-station glass aspheric surface molding machine can be referred to in CN222498965U.

[0029] Specifically, the three-station glass aspheric molding processing method includes: passing the mold with the glass preform material placed thereon through the first processing module 3, the second processing module 4 and the third processing module 5 in sequence, and the first processing module 3, the second processing module 4 and the third processing module 5 respectively process the mold with the glass preform material placed thereon in order.

[0030] Among them, when the mold is in the second processing module 4, the mold is clamped between the upper heat spreader and the lower heat spreader, and the glass preform material undergoes the preheating stage, the forming stage and the cooling stage in the second processing module 4 in sequence. The second processing module 4 is the forming station, and the preheating, forming and cooling of the mold are completed at the same station.

[0031] During the preheating stage, the upper and lower vapor chambers are heated to 420°C to 440°C within 560s to 700s, respectively, to heat the glass preform material in the mold to the processing temperature.

[0032] During the forming stage, the upper and lower heat spreaders are maintained at 420°C to 440°C respectively, and the pressure is increased by 833kgf to 1250kgf for pressing and cutting. The time of the forming stage is 1100 to 3000s, and the glass preform material in the mold is pressed and cut into the required shape.

[0033] During the cooling stage, the upper and lower vapor chambers are cooled to 350°C to 365°C within 280s to 320s to prevent the glass preform material in the mold from being cracked due to premature cooling.

[0034] As can be seen, the processing method of this embodiment is implemented in a three-station glass aspheric molding machine. Preheating, molding, and cooling are performed in the same station, eliminating the need for different processes in different stations. This reduces the footprint and complexity of the molding equipment, while also reducing the time and cost of transporting the mold between stations. However, performing preheating, molding, and cooling in the same station places more stringent process requirements, and the impact of process parameters on lens performance is particularly critical. This embodiment controls the heating rate during the preheating stage to minimize the impact of the process on the optical properties of the glass. The temperature during the molding stage is controlled to not exceed 440°C, as exceeding 440°C can cause heavy fogging of the lens. The temperature during the molding stage is controlled to not less than 420°C, as below 420°C can cause light fogging. Controlling the pressure and time during the molding stage can also reduce processing time. During the cooling stage, the preform material is cooled to 350°C to 365°C before being pushed into the third processing module 4 for cooling, preventing cracking. This embodiment can efficiently produce crack-free and hazy aspheric glass lenses, making it suitable for the production of high-precision lenses.

[0035] In some examples, during the preheating phase, the upper and lower vapor chambers are heated to 420°C to 440°C within 640 to 660 seconds. During the forming phase, the upper and lower vapor chambers are maintained at 420°C to 440°C, with the pressure increased by 1110 to 1250 kgf for press-cutting. The forming phase lasts for 1850 to 2400 seconds. During the cooling phase, the upper and lower vapor chambers are cooled to 350°C to 365°C within 280 to 320 seconds. Under these conditions, the quality and yield rate of the lenses are improved.

[0036] In some examples, during the molding phase, pressure is applied in a descending manner using a precision electric proportional valve, with a pressure resolution of 0.001 MPa, allowing precise adjustment of pressure based on process requirements. In some examples, 0.9 MPa corresponds to a pressure of 1249.6 kgf.

[0037] In some examples, the pressure is provided by a cylinder, and 833 kgf can be achieved using 0.9 of the pressure of a double-strength cylinder, or 1110 kgf can be achieved using 0.8 of the pressure of a triple-strength cylinder.

[0038] In some examples, the total processing cycle of the mold with the glass preform material placed therein sequentially passing through the first processing module 3 , the second processing module 4 , and the third processing module 5 is 30 minutes to 50 minutes, and the production efficiency is high.

[0039] In some examples, the upper and lower heat spreaders can be made of tungsten steel plates, and the mold can be made of stainless steel, which has good heat transfer effect, good anti-corrosion and anti-rust properties, and high mechanical strength.

[0040] In some examples, the glass preform material is M-FCD1, a commercially available glass preform material with readily available raw materials. M-FCD1 has a yield point of 427°C. In some examples, M-FCD1 has a softening point of 513°C, offering excellent processability. However, M-FCD1 is a soft material with a high coefficient of thermal expansion, making it susceptible to breakage and the generation of white haze. The diameter of the glass preform can range from 10 mm to 130 mm.

[0041] In some examples, the thickness of the glass preform material is 5 mm to 7 mm. The processing method of this embodiment is suitable for molding medium-thick glass lenses.

[0042] In some examples, the third processing module 3 includes a cooling plate, and the temperature of the cooling plate is 15-25° C. The cooling plate can be cooled by water, and the temperature can be controlled at 20±1° C.

[0043] In some examples, the three-station glass aspheric molding method further includes: after the cooling stage, moving the mold to a third processing module for rapid cooling.

[0044] In some examples, the first processing module 2 and the third processing module 4 are respectively provided with a sealed box and an air filling and exhaust device connected to the sealed box. The sealed box is connected to the inner cavity of the second processing module 3 and can remain closed with the inner cavity. The mold can move in the sealed box and the inner cavity. The air filling and exhaust device is used to fill nitrogen into the sealed box and the inner cavity and discharge air. The use of nitrogen can effectively reduce the potential negative impact of oxygen on the lens processing process, thereby improving product quality.

[0045] In some examples, the three-station glass aspheric molding machine also includes a feeding device, a discharging device and a shift module 6. The feeding device is used to place the mold into the sealed box of the first processing module, the discharging device is used to take the mold out of the sealed box of the third processing module, and the shift module 6 is used to move the mold in the sealed box of the first processing module, the inner cavity of the second processing module and the sealed box of the third processing module. The shift module 6 can, for example, use a cylinder to move the mold.

[0046] In some examples, during the preheating phase, the upper and lower vapor chambers are first cooled to 300°C to 330°C within 30s to 40s, then heated from 300°C to 330°C to 370°C within 60s to 130s, and then heated from 370°C to 420°C to 440°C within 300s to 480s. After the mold enters the second processing module 3, due to the low temperature of the mold itself, the upper and lower vapor chambers, after cooling down during the cooling phase, are affected by the newly entered mold and their temperatures continue to drop, generally to 300°C to 330°C within 30s to 40s, during which the mold gradually heats up. The upper and lower vapor chambers are then heated from 300°C to 330°C to 370°C within 60s to 130s, quickly heating the mold to 370°C, which helps reduce the total cycle time. Finally, heat from 370°C to 420°C to 440°C within 300s to 480s. When the temperature is higher than 370°C, control the heating rate to avoid rapid heating that affects the optical performance of the lens.

[0047] In some examples, during the preheating stage, the upper and lower heat spreaders are first cooled to 310°C to 330°C within 35s to 40s, then heated from 310°C to 330°C to 370°C within 75s to 90s, and then heated from 370°C to 420°C to 440°C within 500s to 550s, resulting in better quality of the lenses.

[0048] In some examples, when the mold is a newly opened mold or a mold that has completed maintenance, the mold is first left empty and passed through the first processing module 2, the second processing module 3, and the third processing module 4 in sequence. When the mold is in the second processing module 3, the mold is clamped between the upper and lower heat soaking plates. The upper and lower heat soaking plates are used to dry-burn the mold according to the temperature control of the preheating stage, the forming stage, and the cooling stage. That is, before a new mold or a mold that has just undergone maintenance is used to place glass preform materials for processing, it is first dry-burned at least once to avoid fogging of the lens due to the influence of the mold. After multiple tests, molds that have just undergone maintenance will have heavy fog when used directly for glass lens processing, and newly opened molds will basically have fog and occasionally crack. The effect is significantly improved after dry-burning.

[0049] In some examples, the total time for the mold to move between adjacent ones of the first processing module 2, the second processing module 3 and the third processing module 4 is 10s to 15s, which is conducive to smooth transportation of the mold and reduces the total cycle time.

[0050] In some examples, the upper vapor chamber can be in contact with the mold during the preheating phase, or not, or first not in contact and then in contact, to achieve preheating of the mold. During the forming and cooling phases, the upper vapor chamber is in contact with the mold to better maintain temperature, pressure, and cooling.

[0051] In some examples, the upper vapor chamber and the lower vapor chamber are in contact with an electric heating device and a water cooling device, respectively, which facilitates rapid heating and cooling.

[0052] In some examples, at each stage, the temperature difference between the upper and lower vapor chambers is between 0 and 15°C. Preferably, during the forming stage, the temperature difference between the upper and lower vapor chambers is between 0 and 10°C, which is conducive to uniform heating of the material.

[0053] In some examples, there are at least two sets of molds. When one set of molds is in the second processing module 3, the other set of molds is in the third processing module 4. That is, when one set of molds is in the molding process, the other set of molds can be in the rapid cooling process, thereby improving production efficiency.

[0054] In some examples, there are at least three sets of molds, and while two sets of molds are being processed in a three-station glass aspheric molding machine, the other set of molds is used to remove finished lenses or place glass preform materials, further improving production efficiency.

[0055] The technical solution of this embodiment will be further described in detail below through specific examples.

[0056] Example 1

[0057] The steps of the aspherical glass lens processing method of this embodiment are as follows:

[0058] After the materials are added, the mold with the M-FCD1 glass preform material placed therein is pushed by the shift module 6 to pass through the first processing module 2 , the second processing module 3 and the third processing module 4 in sequence.

[0059] When the mold is in the first processing module 2, nitrogen is filled into the closed space communicating among the first processing module 2, the second processing module 3 and the third processing module 4, and air is exhausted.

[0060] When the mold is in the second processing module 3, the timing begins when the mold enters the inner cavity. Affected by the mold entering the inner cavity, the upper soaking plate temperature drops to 328°C at 37 seconds, then rises to 370°C and maintains at 370°C at 114 seconds. The lower soaking plate temperature drops to 310°C at 37 seconds, then rises to 370°C at 126 seconds. Then, after 126 seconds, molding is performed according to the process parameters shown in Table 1 below. Pressure is applied using a triple-force cylinder. The pressure of 0.8 in Table 1 corresponds to 1110 kgf. STEP 1 to STEP 5 are part of the preheating stage, STEP 6 to STEP 8 are the molding stage, and STEP 9 is the cooling stage. The upper and lower soaking plate temperatures are the temperatures at the end of each step.

[0061] Table 1

[0062] condition pressure Time(s) Upper vapor chamber temperature (℃) Lower vapor chamber temperature (°C) STEP 1 0 120 375 375 STEP 2 0 70 385 385 STEP 3 0 70 395 405 STEP 4 0 70 405 410 STEP 5 0 200 420 430 STEP 6 0.8 900 420 430 STEP 7 0.8 900 420 430 STEP 8 0.8 600 420 430 STEP 9 0.1 310 360 360

[0063] When the mold is in the third processing module 4, the temperature of the cooling plate is 20±1°C, the mold is rapidly cooled, and the material is discharged after cooling for 150 seconds.

[0064] 5 lenses were molded continuously, and the thickness of the lenses were all within the range of 5.794±0.005mm, meeting the requirement of 5.788~5.808mm, without cracks or fog.

[0065] Example 2

[0066] The steps of this embodiment are basically the same as those of embodiment 1, except that the process parameters in Table 1 are replaced by those in Table 2.

[0067] Table 2

[0068]

[0069] 5 lenses were molded continuously, and the thickness of the lenses were all within the range of 5.798±0.005mm, meeting the requirement of 5.788~5.808mm, without cracks or fog.

[0070] Example 3

[0071] The steps of this embodiment are basically the same as those of embodiment 1, except that the process parameters in Table 1 are replaced by those in Table 3.

[0072] Table 3

[0073]

[0074]

[0075] 5 lenses were molded continuously without any cracks, 3 of which had heavy fog and 2 had light fog.

[0076] Example 4

[0077] The steps of this embodiment are basically the same as those of Example 1, except that the process parameters in Table 1 are replaced by those in Table 4.

[0078] Table 4

[0079]

[0080] 5 lenses were molded continuously without any cracks, 2 of which were slightly foggy.

[0081] Example 5

[0082] The steps of this embodiment are basically the same as those of embodiment 1, except that the pressure is applied by a double-force cylinder, and the process parameters in Table 1 are replaced by those in Table 5. The pressure of 0.9 in Table 5 corresponds to 833 kgf.

[0083] Table 5

[0084]

[0085] Five lenses were molded continuously, but two of them were not pressed into place.

[0086] Example 6

[0087] The steps of this embodiment are basically the same as those of embodiment 1, except that STEP 9 in Table 1 is omitted, and the mold directly enters the third processing module 4 for rapid cooling without undergoing a cooling stage in the second processing module 3 .

[0088] In this embodiment, 5 lenses were continuously molded, and all of them were broken.

[0089] Example 7

[0090] The steps of this embodiment are basically the same as those of embodiment 1, except that the temperatures of the upper and lower vapor chambers in STEP 9 in Table 1 are both 370°C.

[0091] In this embodiment, 5 lenses were continuously molded, 3 of which were broken.

[0092] Example 8

[0093] The steps of this embodiment are basically the same as those of embodiment 1, except that the time of STEP 9 in Table 1 is changed to 270 seconds.

[0094] In this embodiment, 5 lenses were continuously molded, 2 of which were broken.

[0095] Example 9

[0096] The steps of this embodiment are basically the same as those of embodiment 1, except that the time of STEP 1 to STEP 4 in Table 1 is changed to 40 seconds respectively, and the time of STEP 5 is changed to 100 seconds.

[0097] In this embodiment, 5 lenses were continuously molded, 4 of which were slightly foggy and 1 was cracked.

[0098] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A three-station glass aspheric molding method, characterized in that The invention is implemented based on a three-station glass aspheric surface molding machine, wherein the three-station glass aspheric surface molding machine includes a first processing module, a second processing module, and a third processing module connected in sequence, wherein the first processing module and the third processing module do not have a heating function, and the second processing module has a heating and pressurizing function, and the second processing module includes an upper heat sink and a lower heat sink; The three-station glass aspheric surface molding method comprises: Passing the mold with the glass preform material placed thereon through the first processing module, the second processing module, and the third processing module in sequence; When the mold is in the second processing module, the mold is clamped between the upper heat spreader and the lower heat spreader, and the glass preform material undergoes a preheating stage, a forming stage and a cooling stage in sequence; in the preheating stage, the upper heat spreader and the lower heat spreader are heated to 420°C to 440°C within 560s to 700s respectively; in the forming stage, the upper heat spreader and the lower heat spreader are maintained at 420°C to 440°C respectively, and the pressure is increased by 833kgf to 1250kgf for press cutting, and the time of the forming stage is 1100 to 3000s; in the cooling stage, the upper heat spreader and the lower heat spreader are cooled to 350°C to 365°C within 280s to 320s.

2. A three-station glass aspheric surface molding method according to claim 1, characterized in that The glass preform material is M-FCD1; The yield point of the glass preform material is 427°C; The softening point of the glass preform material is 513°C; The thickness of the glass preform material is 5 mm to 7 mm.

3. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that The third processing module includes a cooling plate, the temperature of the cooling plate is 15-25°C; The three-station glass aspheric surface molding method further includes: after the cooling stage, moving the mold to the third processing module for rapid cooling.

4. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that The first processing module and the third processing module are respectively provided with a sealed box and an inflation and exhaust device connected to the sealed box. The sealed box is connected to the inner cavity of the second processing module and can remain sealed with the inner cavity. The mold can move within the sealed box and the inner cavity. The inflation and exhaust device is used to fill the sealed box and the inner cavity with nitrogen and exhaust air. The three-station glass aspheric molding machine also includes a feeding device, a discharging device and a shift module. The feeding device is used to place the mold into the sealed box of the first processing module, the discharging device is used to take the mold out of the sealed box of the third processing module, and the shift module is used to move the mold in the sealed box of the first processing module, the inner cavity of the second processing module and the sealed box of the third processing module.

5. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that During the preheating stage, the upper and lower heat spreaders are first cooled to 300°C to 330°C within 30s to 40s, then heated from 300°C to 330°C to 370°C within 60s to 130s, and then heated from 370°C to 420°C to 440°C within 400s to 550s.

6. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that When the mold is a newly opened mold or a mold that has completed maintenance, the mold is first placed empty and passes through the first processing module, the second processing module and the third processing module in sequence. When the mold is in the second processing module, the mold is clamped between the upper heat spreader and the lower heat spreader. The upper heat spreader and the lower heat spreader are used to control the temperature of the preheating stage, the molding stage and the cooling stage to perform empty firing on the mold.

7. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that The total time for the mold to move between two adjacent ones of the first processing module, the second processing module and the third processing module is 10s to 15s.

8. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that During the preheating stage, the upper vapor chamber is in contact with the mold, or not in contact with the mold, or not in contact with the mold first and then in contact with the mold; during the molding stage and the cooling stage, the upper vapor chamber is in contact with the mold; The upper vapor chamber and the lower vapor chamber are in contact with the electric heating device and the water cooling device respectively; The temperature difference between the upper vapor chamber and the lower vapor chamber is between 0° C. and 15° C.

9. A three-station glass aspheric surface molding method according to claim 1 or 2, characterized in that There are at least two sets of molds, one set of molds is in the second processing module, and the other set of molds is in the third processing module.

10. A three-station glass aspheric surface molding method according to claim 9, characterized in that There are at least three sets of molds. When two sets of molds are processed in the three-station glass aspheric molding machine, the other set of molds is used to take out the finished lens or place the glass preform material.

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