Manufacturing device for curved-surface dimming film

Abstract

A manufacturing device for a curved-surface dimming film. By means of a feeding unit, a pulse heat-shock unit, a heat transfer unit, and a hot-press forming unit, on the basis of corresponding process parameters, pulse heat-shock and hot-press forming are performed on a flat dimming film to manufacture a curved-surface dimming film having a preset size and shape, i.e., a preset curved-surface function θ; and then, the curved-surface dimming film and curved glass corresponding thereto are prepared into curved-surface dimming glass. The problem in the prior art that curved-surface dimming glass prepared by a flat dimming film has a wrinkled appearance is solved. The present device is simple and easy to control, and has good application prospects.

Description

Manufacturing equipment for curved dimming film

[0001] Cross-references

[0002] This application claims priority to the international patent application PCT / CN2023 / 138058, entitled “A curved dimming film, curved dimming glass and its preparation”, filed with the Patent Office of China on December 12, 2023, and the international patent application PCT / CN2024 / 076628, entitled “A curved dimming film, curved dimming glass and its preparation”, filed with the Patent Office of China on February 7, 2024, the contents of which are incorporated by reference in their entirety into this application. Technical Field

[0003] The present invention relates to a manufacturing device for a curved surface dimming film, and more particularly, to a manufacturing device for a curved surface dimming film comprising a pulse thermal shock unit and a hot pressing forming unit. Background Art

[0004] Smart glass is a light-control device that primarily incorporates a smart film between two layers of transparent glass. Types of smart films include suspended particle optics (SPD), polymer dispersed liquid crystal (PDLC), electrochromic (EC), thermochromic (TC), and photochromic (PC). For SPD, PDLC, and EC films, when powered on, the arrangement or state of the materials within the film changes, altering the film's light transmission characteristics, such as from low transmittance to high transmittance or vice versa. These films, which can rapidly switch between on and off states through the action of electric fields / currents, offer the advantages of actively controlling light transmittance and energy conservation. They can be used in smart windows, rearview mirrors, sunglasses, and displays in spacecraft, high-speed trains, automobiles, and buildings.

[0005] With the rapid development of new energy vehicle panoramic sunroofs and architectural glass curtain walls, users are increasingly demanding more diverse glass options, particularly for complex, multi-curved glass. However, the production of complex curved glass into smart glass has become a bottleneck restricting its application. Unlike flat smart glass, using flat smart film during the processing of curved smart glass often results in wrinkles in the laminated film as the curvature of the surface increases and multiple curves are required. This severely impacts the appearance of the glass and ultimately leads to low product yields.

[0006] It can be seen that in the existing technology, when manufacturing curved smart glass, the problem of wrinkles easily occurs in the curved smart glass after laminating with a flat smart film. Therefore, it is necessary to provide a device that can manufacture curved smart film from a flat smart film, and then use the curved smart film and the corresponding curved glass to manufacture curved smart glass to solve this problem.

[0007] Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a manufacturing device for preparing a curved dimming film.

[0009] A manufacturing device for a curved dimming film, comprising:

[0010] A loading unit, used for providing a flat dimming film;

[0011] A pulse heat shock unit, used for performing a pulse heat shock on the planar dimming film;

[0012] A heat transfer unit, used for heat-insulating and transferring the planar dimming film produced by the pulse heat shock unit;

[0013] The hot pressing forming unit is used to perform hot pressing forming on the flat dimming film from the heat transfer unit to form a curved dimming film.

[0014] Optionally, the pulse heat shock unit includes an upper heating module and a lower heating module, the upper heating module is used to heat the upper surface of the planar dimming film from the loading unit, and the lower heating module is used to heat the lower surface of the planar dimming film from the loading unit.

[0015] Optionally, the heating temperatures of the upper heating module and the lower heating module can be controlled independently.

[0016] Optionally, the pulse heat shock unit also includes a sample rack arranged between the upper heating module and the lower heating module, the sample rack is used to place the planar dimming film from the loading unit, the sample rack is within a range of 2 cm to 10 cm from the upper heating module, and the sample rack is within a range of 2 cm to 10 cm from the lower heating module.

[0017] Optionally, the hot pressing molding unit includes an upper molding mold and a lower molding mold, the size and shape of the upper molding mold and the lower molding mold match, the upper molding mold is used to hot press molding the upper surface of the planar dimming film from the heat transfer unit, and the lower molding mold is used to hot press molding the lower surface of the planar dimming film from the heat transfer unit.

[0018] Optionally, the upper molding die and the lower molding die can be heated at temperatures controlled independently.

[0019] Optionally, the surface function θ of the upper molding die and the lower molding die ranges from 0 mm / m to 300 mm / m.

[0020] Optionally, the surface function θ of the upper molding die and the lower molding die further ranges from 35 mm / m to 250 mm / m.

[0021] Optionally, the cross-sectional profiles of the cross-sectional lines of the upper molding die and the lower molding die include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

[0022] Optionally, a ratio of curvature R of the cross-section of the sectional lines at the same stacking position of the upper molding die and the lower molding die is in the range of 0.9 to 1.1.

[0023] Optionally, the relative surfaces of the upper molding die and / or the lower molding die have an uneven structure.

[0024] Optionally, the lower molding die is densely covered with vacuum channels with a pore diameter of less than 2 mm.

[0025] Optionally, the lower molding die is connected to a first vacuum pumping system, and the first vacuum pumping system performs vacuuming through vacuum pumping holes on the lower molding die.

[0026] Optionally, the manufacturing equipment also includes a first pressing drive device, which is connected to the upper molding mold and is used to drive the upper molding mold to be pressed on the lower molding mold to perform hot pressing molding on the planar dimming film from the heat transfer unit, and the lower molding mold is fixed.

[0027] Optionally, the pulse heat shock unit includes an upper heating module and a lower heating module, the upper heating module is used to heat the upper surface of the planar dimming film from the loading unit, and the lower heating module is used to heat the lower surface of the planar dimming film from the loading unit;

[0028] The lower forming mold is densely covered with vacuum holes with a pore diameter of less than 2 mm; the lower forming mold is connected to a first vacuum system, and the first vacuum system performs vacuuming through the vacuum holes on the lower forming mold;

[0029] The manufacturing equipment further includes a first pressing driving device, which is connected to the upper molding die and is used to drive the upper molding die to press the upper molding die onto the lower molding die to perform heat pressing on the planar dimming film from the heat transfer unit, and the lower molding die is fixed;

[0030] While working:

[0031] In the pulse heat shock unit, the temperature range of the upper heating module is set to 120°C to 280°C, the temperature range of the lower heating module is set to 130°C to 290°C, the temperature of the lower heating module is set to be 10°C to 15°C higher than that of the upper heating module, and the heating time of the upper heating module and the lower heating module is set to 3s to 60s;

[0032] The temperature range of the heat transfer unit is set to 70° C. to 130° C., and the heat transfer unit is configured to transfer the planar dimming film after the pulse heat shock unit is completed to the hot pressing molding unit within 2s to 50s;

[0033] In the hot pressing unit, the temperature range of the upper forming mold is set to 50°C to 180°C, the temperature range of the lower forming mold is set to 55°C to 185°C, the temperature of the lower forming mold is set to be 5°C to 10°C higher than the temperature of the upper forming mold, and the upper and lower forming molds are configured to perform hot pressing on the planar dimming film from the heat transfer unit for 5s to 90s;

[0034] The temperature of the upper heating module is set to be at least 20° C. higher than the temperature of the upper forming mold;

[0035] The relative pressure range generated by the first pressing driving device driving the upper forming mold to press the lower forming mold is set to 0.05 MPa to 1.5 MPa;

[0036] The relative pressure of the negative pressure provided by the first vacuum system is set to be lower than -0.02 MPa.

[0037] Optional, while working:

[0038] In the pulse thermal shock unit, the temperature range of the upper heating module is further set to 130°C to 250°C, the temperature range of the lower heating module is further set to 140°C to 260°C, and the heating time of the upper heating module and the lower heating module is further set to 4s to 35s.

[0039] Optional, while working:

[0040] In the hot pressing molding unit, the temperature range of the upper molding die is further set to 80°C to 140°C, and the temperature range of the lower molding die is further set to 85°C to 145°C. The upper molding die and the lower molding die are configured to perform hot pressing molding on the planar dimming film from the heat transfer unit for 10s to 60s.

[0041] Optional, while working:

[0042] The temperature of the upper heating module is set to be at least 30° C. higher than the temperature of the upper molding die.

[0043] Optional, while working:

[0044] The relative pressure range generated by the first pressing driving device driving the upper molding die to press the lower molding die is further set to be 0.2 MPa to 1.2 MPa.

[0045] Optionally, the manufacturing equipment further includes a blanking unit for outputting the curved dimming film from the hot pressing forming unit.

[0046] Optionally, the manufacturing equipment further comprises:

[0047] A cold transfer unit, used for cooling and transferring the curved dimming film completed by the hot pressing forming unit;

[0048] A cold curing unit, used for cold curing the curved dimming film from the cold conveying unit;

[0049] The unloading unit is used to output the curved dimming film from the cold-curing unit.

[0050] Optionally, the cold curing unit includes an upper curing mold and a lower curing mold, and the size and shape of the upper curing mold and the lower curing mold match each other. The upper curing mold is used to cold curing the upper surface of the curved dimming film from the cold conveying unit, and the lower curing mold is used to cold curing the lower surface of the curved dimming film from the cold conveying unit.

[0051] Optionally, the upper solid mold and the lower solid mold can be independently heated / cooled.

[0052] Optionally, the hot pressing molding unit includes an upper molding die and a lower molding die, the upper molding die and the lower molding die are matched in size and shape, the upper molding die is used to hot press the upper surface of the planar dimming film from the heat transfer unit, and the lower molding die is used to hot press the lower surface of the planar dimming film from the heat transfer unit;

[0053] The upper molding die in the hot press molding unit matches the size and shape of the upper solidifying die in the cold shock solidifying unit, and the lower molding die in the hot press molding unit matches the size and shape of the lower solidifying die in the cold shock solidifying unit.

[0054] Optionally, the surface functions θ of the upper molding die and the lower molding die in the hot pressing molding unit, and the upper curing die and the lower curing die in the cold curing unit are equal.

[0055] Optionally, the surface function θ of the upper solid mold and the lower solid mold ranges from 0 mm / m to 300 mm / m.

[0056] Optionally, the surface function θ of the upper solid mold and the lower solid mold further ranges from 35 mm / m to 250 mm / m.

[0057] Optionally, the cross-sectional profiles of the cross-sectional lines of the upper solid mold and the lower solid mold include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

[0058] Optionally, a ratio of curvature R of cross sections of the cross-sectional lines at the same stacking position of the upper solid mold and the lower solid mold is in the range of 0.9 to 1.1.

[0059] Optionally, the relative surfaces of the upper solid mold and / or the lower solid mold have an uneven structure.

[0060] Optionally, the lower solid mold is densely covered with vacuum holes with a pore diameter of less than 2 mm.

[0061] Optionally, the lower solid mold is connected to a second vacuum pumping system, and the second vacuum pumping system performs vacuuming through vacuum pumping holes on the lower solid mold.

[0062] Optionally, the manufacturing equipment also includes a second pressing drive device, which is connected to the upper solid mold and is used to drive the upper solid mold to be pressed on the lower solid mold to perform cold curing on the curved dimming film from the cold transfer unit, and the lower solid mold is fixed.

[0063] Optionally, the lower solid mold is densely covered with vacuum holes with a hole diameter of less than 2 mm; the lower solid mold is connected to a second vacuum system, and the second vacuum system performs vacuuming through the vacuum holes on the lower solid mold;

[0064] The manufacturing equipment further includes a second pressing drive device connected to the upper solidifying mold, configured to drive the upper solidifying mold to press the upper solidifying mold onto the lower solidifying mold to perform cold curing on the curved dimming film from the cold conveying unit, wherein the lower solidifying mold is fixedly arranged;

[0065] While working:

[0066] The temperature range of the cold transfer unit is set to be lower than 40° C., and the cold transfer unit is configured to transfer the curved dimming film completed from the hot pressing molding unit to the cold curing unit within 2 seconds to 50 seconds;

[0067] In the cold curing unit, the temperature range of the upper curing mold is set to be lower than 40° C., and the temperature range of the lower curing mold is set to be lower than 40° C. The upper curing mold and the lower curing mold are configured to perform a cold curing treatment on the curved dimming film from the cold conveying unit for 30 seconds to 600 seconds;

[0068] The relative pressure range generated by the second pressing driving device driving the upper fixing mold to press the lower fixing mold is set to 0.05 MPa to 1.5 MPa;

[0069] The relative pressure of the negative pressure provided by the second vacuum system is set to be lower than -0.02 MPa.

[0070] Optional, while working:

[0071] In the cold curing unit, the temperature range of the upper curing mold is further set to be lower than 30°C, and the temperature range of the lower curing mold is further set to be lower than 30°C. The upper curing mold and the lower curing mold are configured to cold cure the curved dimming film from the cold transfer unit for 50s to 500s.

[0072] Optionally, the relative pressure range generated by the second pressing driving device driving the upper fixing mold to press on the lower fixing mold is further set to 0.2 MPa to 1.2 MPa.

[0073] In this invention, the facing surfaces of the upper and / or lower molding dies of the thermoforming unit have an uneven structure, with the height difference between the highest and lowest points of the uneven structure ranging from 1μm to 50μm. This mold structure is more conducive to securing the dimming film during the thermoforming process and preventing displacement between the dimming film and the mold surface. The lower molding die is densely covered with vacuum holes with a diameter of 2mm or less. During thermoforming, these vacuum holes are used to apply vacuum, ensuring a closer fit between the dimming film and the lower molding die surface.

[0074] In this invention, the upper and / or lower surfaces of the cold-curing mold have an uneven structure, with the height difference between the highest and lowest points of the uneven structure ranging from 1μm to 50μm. This mold structure is more conducive to fixing the dimming film during the cold-curing process and preventing displacement between the dimming film and the mold surface. The lower curing mold is densely covered with vacuum holes with a diameter of less than 2mm. During cold-curing, vacuum is applied through these holes, ensuring a closer fit between the dimming film and the lower curing mold surface.

[0075] The present invention ensures that the dimming active layer in the dimming film is not affected by high temperature by precisely controlling the pulse heat shock and hot pressing conditions of the planar dimming film, while satisfying the softening of the transparent substrates on both sides of the dimming film, thereby realizing a curved dimming film with a predetermined surface function θ. This "temperature" is crucial. The deformation of the dimming film before and after the pulse heat shock and hot pressing is controlled to not exceed 10%. The deformation refers to the change in the size of the dimming film in any direction not exceeding 10%, preferably not exceeding 5%. The deformation variable C = (size before treatment - size after treatment) / size before treatment * 100% absolute value, and the maximum value of the deformation variable in any direction is recorded as C max , that is, C max ≤10%, preferably C max ≤5%.

[0076] In the present invention, the cold-shock curing unit is used to prevent the curved dimming film formed by hot pressing from rebounding and deforming during the natural cooling process after the molding pressure is released at a high temperature, resulting in a decrease in the curved surface function θ. The cold-shock curing unit can effectively prevent the curved surface function θ from decreasing.

[0077] Experiments have shown that the manufacturing equipment for the curved dimming film of the present invention adopts the means of pulse heat shock and hot pressing of the flat dimming film to prepare a curved dimming film of a predetermined size and shape, that is, a predetermined surface function θ. Furthermore, the curved dimming film and the corresponding curved glass can be prepared to obtain curved dimming glass, which solves the problem of wrinkle defects in the appearance of curved dimming glass prepared by using flat dimming film in the prior art. This equipment is simple, easy to control, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] FIG1 is a schematic top view of an upper forming mold of the present invention;

[0079] FIG2 is a schematic cross-sectional view of the molding die in FIG1 taken along the XX or YY direction of the present invention;

[0080] FIG3 is a unit block diagram of a manufacturing device for a curved dimming film according to the present invention;

[0081] FIG4 is a unit block diagram of another device for manufacturing a curved dimming film according to the present invention;

[0082] FIG5 is a schematic diagram of a pulse thermal shock unit of the present invention;

[0083] FIG6 is a schematic diagram of a hot pressing forming unit and a first pressing drive device according to the present invention;

[0084] FIG7 is a schematic diagram of a cold-curing unit and a second pressing drive device according to the present invention;

[0085] FIG8 is a photograph of wrinkles of the switchable glass of Comparative Example 9 of the present invention;

[0086] FIG9 is a photograph of wrinkles of the switchable glass of Comparative Example 10 of the present invention;

[0087] FIG10 is a photograph of wrinkles of the switchable glass of Comparative Example 11 of the present invention;

[0088] FIG11 is a photograph of wrinkles of the switchable glass of Comparative Example 12 of the present invention;

[0089] In Figure 2, the solid curve segment ADB represents the outer surface of the upper molding die, the dotted line ACB represents the reference plane, the length of the dotted straight line segment ACB is L (in meters), the length of the dotted straight line segment CD is H (in millimeters), and the dotted straight line segment CD is perpendicular to the dotted straight line segment ACB, that is, the angle β is 90°, where the maximum value of H is recorded as H max . The angle between the XX section line and the YY section line is α, and 0°<α≤90°. The intersection point O of the two section lines is the projection point of the center of gravity of the upper molding die; in Figure 5, 51 is the upper heating module, 52 is the sample holder, and 53 is the lower heating module; in Figure 6, 61 is the first pressing drive device, 62 is the upper molding die, and 63 is the lower molding die; in Figure 7, 71 is the second pressing drive device, 72 is the upper solid mold, and 73 is the lower solid mold. DETAILED DESCRIPTION

[0090] Figure 3 shows a unit block diagram of a manufacturing device for a curved dimming film provided by the present invention. As shown in Figure 3, the manufacturing device includes a loading unit, a pulse heat shock unit, a heat transfer unit and a hot pressing molding unit. According to the process flow, the loading unit is used to provide a flat dimming film, the pulse heat shock unit is used to perform pulse heat shock on the flat dimming film, the heat transfer unit is used to perform heat preservation transfer on the flat dimming film completed by the pulse heat shock unit, and the hot pressing molding unit is used to perform hot pressing molding on the flat dimming film from the heat transfer unit to form a curved dimming film. That is, the manufacturing device can perform pulse heat shock and hot pressing molding on the flat dimming film to form a curved dimming film. Furthermore, the curved dimming film and the corresponding curved glass can be prepared to obtain curved dimming glass, thereby solving the problem of wrinkle defects in the appearance of curved dimming glass prepared using a flat dimming film in the prior art. This device is simple, easy to control, and has good application prospects.

[0091] In the present invention, as shown in Figure 5, the pulse heat shock unit includes an upper heating module 51 and a lower heating module 53. The upper heating module 51 is used to heat the upper surface of the planar dimming film from the loading unit, and the lower heating module 53 is used to heat the lower surface of the planar dimming film from the loading unit. The heating temperatures of the upper heating module 51 and the lower heating module 53 can be controlled independently.

[0092] In the present invention, as shown in Figure 5, the pulse heat shock unit also includes a sample rack 52 arranged between the upper heating module 51 and the lower heating module 53. The sample rack 52 is used to place the flat dimming film from the loading unit. The distance between the sample rack 52 and the upper heating module 51 is in the range of 2cm to 10cm, and the distance between the sample rack 52 and the lower heating module 53 is in the range of 2cm to 10cm.

[0093] In the present invention, as shown in Figure 6, the hot pressing molding unit includes an upper molding die 62 and a lower molding die 63. The sizes and shapes of the upper molding die 62 and the lower molding die 63 match each other. The upper molding die 62 is used to hot press the upper surface of the planar dimming film from the heat transfer unit, and the lower molding die 63 is used to hot press the lower surface of the planar dimming film from the heat transfer unit. The heating temperatures of the upper molding die 62 and the lower molding die 63 can be controlled separately.

[0094] In the present invention, in combination with FIG1 and FIG2, the curvature R of the upper forming die is defined as: curvature R = H max / L, where H max The unit of is mm (millimeter), the unit of L is m (meter), and the unit of curvature R is mm / m (millimeter / meter).

[0095] In the present invention, the surface function θ is used to represent the surface characteristics of the upper forming mold, that is, the size and shape of the upper forming mold. The larger the value of the surface function θ, the more complex the surface. Specifically, the surface function θ is defined as: among the values ​​of the curvature R of any cross-section passing through the center of gravity of the upper forming mold and the section line passing through the upper forming mold, the maximum curvature R is called R max , the minimum curvature R is called R min When R max >0, R min = 0, then the surface function θ = R max / 2, such as a single curved surface, then R max The range is 0mm / m~600mm / m, preferably 70mm / m~500mm / m; when R max =R min >0, then the surface function θ=R max , such as an axisymmetric surface (sphere), then R max The range is 0mm / m~300mm / m, preferably 35mm / m~250mm / m; when Rmax >R min >0, then the surface function θ=(R max +R min ) / 2, such as hyperbolic and complex surfaces; when R max =R min = 0, then θ = 0, which means it is a plane. The unit of surface function θ is mm / m (millimeter / meter).

[0096] The above-mentioned curvature R and surface function θ are both calculated based on the concave or convex outer surface of any cross-section line passing through the center of gravity of the upper molding die and penetrating the upper molding die. In FIG2 , the outer surface of the upper molding die is convex.

[0097] In the present invention, the definitions of the curved glass, the curved dimming film, the curvature R of the lower forming mold, and the curved surface function θ are the same as those of the upper forming mold and will not be repeated herein.

[0098] In the present invention, the upper and lower molding dies of the hot press molding unit have predetermined sizes and shapes, that is, predetermined surface functions θ. This is intended to produce a curved switchable film of predetermined size and shape, that is, a curved switchable film with a predetermined surface function θ. Although the surface function θ of the produced curved switchable film deviates somewhat from the surface functions θ of the upper and lower molding dies, this is reasonable, as it is well known that it is impossible to completely eliminate the thermal deformation effects of materials during thermal processing. Similarly, during the production of a curved switchable film, it is impossible to completely eliminate the rebound deformation that occurs during the cooling process after the hot press molding unit releases the molding pressure at a high temperature. This can cause the surface function θ of the curved switchable film to decrease, resulting in a discrepancy between the surface function θ of the curved switchable film and the surface functions θ of the upper and lower molding dies. Clearly, the present invention is not intended to provide a technique for producing a curved switchable film with a surface function θ that is equal to the surface functions θ of the upper and lower molding dies used. Of course, the present invention can provide a device for preparing a curved dimming film with a predetermined surface function θ by adjusting the surface function θ of the upper molding mold and the lower molding mold. However, the surface function θ of the upper molding mold and the lower molding mold is not necessarily completely equal to the surface function θ of the prepared curved dimming film.

[0099] Optionally, the surface function θ of the upper molding die 62 and the lower molding die 63 may be in the range of 0 mm / m to 300 mm / m, so as to prepare a curved dimming film having a surface function θ in the range of 0 mm / m to 300 mm / m.

[0100] Further optionally, the surface function θ of the upper molding die 62 and the lower molding die 63 may be in the range of 35 mm / m to 250 mm / m, so as to prepare a curved dimming film having a surface function θ in the range of 35 mm / m to 250 mm / m.

[0101] In the present invention, the cross-sectional profiles of the cross-sectional lines of the upper molding die 62 and the lower molding die 63 may include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

[0102] In the present invention, the ratio of the curvature R of the cross-section of the sectional lines at the same stacking position of the upper molding die 62 and the lower molding die 63 may be in the range of 0.9 to 1.1.

[0103] In the present invention, the relative surfaces of the upper molding mold 62 and / or the lower molding mold 63 of the hot pressing molding unit have an uneven structure, and the height difference between the highest point and the lowest point of the uneven structure ranges from 1μm to 50μm. Such a mold structure is more conducive to fixing the dimming film during the hot pressing molding process and preventing displacement between the dimming film and the mold surface.

[0104] In the present invention, the lower molding die 63 of the hot pressing molding unit is densely covered with vacuum channels with an aperture of less than 2 mm. The lower molding die 63 is connected to a first vacuum system, and the first vacuum system performs vacuuming through the vacuum channels on the lower molding die 63, so that the dimming film can be further fitted to the surface of the lower molding die 63 by vacuuming when the dimming film is hot pressed.

[0105] As shown in Figures 3 and 6 , the manufacturing apparatus for a curved dimming film provided by the present invention may further include a first pressing drive device 61. The first pressing drive device 61 is connected to an upper forming mold 62 and is used to drive the upper forming mold 62 to press the upper forming mold 62 onto a lower forming mold 63 to perform thermal pressing on the flat dimming film from the heat transfer unit. The lower forming mold 63 is fixedly positioned. The first pressing drive device 61 uses compressed air as a driving force.

[0106] During specific operation, in the pulse heat shock unit, the temperature range of the upper heating module 51 can be set to 120℃~280℃, the temperature range of the lower heating module 53 can be set to 130℃~290℃, the temperature of the lower heating module 53 is set to be 10℃~15℃ higher than the temperature of the upper heating module 51, and the heating time of the upper heating module 51 and the lower heating module 53 can be set to 3s~60s; the temperature range of the heat transfer unit is set to 70℃~130℃, and the heat transfer unit is set to transfer the planar dimming film after the pulse heat shock unit is completed to the hot pressing molding unit within 2s~50s; in the hot pressing molding unit, the temperature range of the upper molding mold 62 can be set to 50℃~18 0℃, the temperature range of the lower molding mold 63 can be set to 55℃~185℃, the temperature of the lower molding mold 63 is set to be 5℃~10℃ higher than the temperature of the upper molding mold 62, the upper molding mold 62 and the lower molding mold 63 are set to perform hot pressing molding treatment on the flat dimming film from the heat transfer unit for 5s~90s; wherein, the temperature of the upper heating module 51 is set to be at least 20℃ higher than the temperature of the upper molding mold 62; the relative pressure range generated by the first pressing drive device 61 driving the upper molding mold 62 to press on the lower molding mold 63 is set to be 0.05MPa~1.5MPa; the relative pressure of the negative pressure provided by the first vacuum system is set to be lower than -0.02MPa.

[0107] Furthermore, when the pulse thermal shock unit is working, the temperature range of the upper heating module 51 can be set to 130℃~250℃, the temperature range of the lower heating module 53 can be set to 140℃~260℃, and the heating time of the upper heating module 51 and the lower heating module 53 can be set to 4s~35s.

[0108] Furthermore, when the hot pressing molding unit is working, the temperature range of the upper molding mold 62 can be set to 80℃~140℃, and the temperature range of the lower molding mold 63 can be set to 85℃~145℃. The upper molding mold 62 and the lower molding mold 63 are set to perform hot pressing molding treatment on the flat dimming film from the heat transfer unit for 10s~60s.

[0109] Furthermore, during operation, the temperature of the upper heating module 51 may be set to be at least 30° C. higher than the temperature of the upper molding die 62 .

[0110] Furthermore, during specific operation, the relative pressure range generated by the first pressing driving device 61 driving the upper molding die 62 to press on the lower molding die 63 can be set to 0.2 MPa to 1.2 MPa.

[0111] On the basis of any of the above embodiments, optionally, as shown in FIG3 , the manufacturing apparatus for the curved dimming film provided by the present invention may further include a blanking unit for outputting the curved dimming film from the hot pressing forming unit.

[0112] Figure 4 shows a block diagram of another device for manufacturing a curved dimming film according to the present invention. As shown in Figure 4 , in addition to the aforementioned loading unit, pulse heat shock unit, heat transfer unit, and hot pressing unit, the device further includes a cold transfer unit, a cold curing unit, and a discharge unit. The cold transfer unit is used to cool and transfer the curved dimming film produced by the hot pressing unit, the cold curing unit is used to cold-cure the curved dimming film produced by the cold transfer unit, and the discharge unit is used to discharge the curved dimming film produced by the cold curing unit. As previously mentioned, it is impossible to completely prevent the curved dimming film from rebounding during the cooling process after the hot pressing unit releases the molding pressure and the film is subjected to high temperature during the manufacturing process. This can cause the curved dimming film's surface function θ to decrease. Therefore, the present invention further utilizes a cold curing unit to minimize the problem of shrinkage-induced decrease in the curved dimming film's surface function θ.

[0113] In the present invention, as shown in Figure 7, the cold curing unit includes an upper curing mold 72 and a lower curing mold 73. The size and shape of the upper curing mold 72 and the lower curing mold 73 match each other. The upper curing mold 72 is used to cold-cure the upper surface of the curved dimming film from the cold conveying unit, and the lower curing mold 73 is used to cold-cure the lower surface of the curved dimming film from the cold conveying unit. The upper curing mold 72 and the lower curing mold 73 can be individually controlled for heating / cooling temperature.

[0114] In the present invention, the upper and lower curing molds 72 and 73 of the cold curing unit have predetermined sizes and shapes, and the sizes and shapes of the upper and lower curing molds 72 and 73 match. As previously mentioned, the upper and lower molding molds 62 and 63 of the hot press molding unit have predetermined sizes and shapes, and the sizes and shapes of the upper and lower molding molds 62 and 63 match. Furthermore, the upper molding mold 62 in the hot press molding unit matches the size and shape of the upper curing mold 72 in the cold curing unit. Similarly, the lower molding mold 63 in the hot press molding unit matches the size and shape of the lower curing mold 73 in the cold curing unit. In other words, the sizes and shapes of the upper and lower molding molds 62 and 63 in the hot press molding unit, as well as the upper and lower curing molds 72 and 73 in the cold curing unit, all match. Specifically, the surface functions θ of the upper and lower molding molds 62 and 63 in the hot press molding unit, as well as the upper and lower curing molds 72 and 73 in the cold curing unit, are equal.

[0115] In the present invention, the surface function θ of the mold is equivalent to the surface function θ of the upper molding mold and / or lower molding mold of the hot pressing molding unit and the upper curing mold and / or lower curing mold of the cold curing unit.

[0116] In the present invention, the definitions of the curved glass, curved dimming film, lower forming mold, upper solidifying mold, and curvature R and surface function θ of the lower solidifying mold are the same as those of the upper forming mold and will not be repeated.

[0117] Thus, it can be understood that in the present invention, optionally, the surface function θ of the upper solid mold 72 and the lower solid mold 73 can range from 0 mm / m to 300 mm / m; further optionally, the surface function θ of the upper solid mold 72 and the lower solid mold 73 can range from 35 mm / m to 250 mm / m.

[0118] In the present invention, the cross-sectional profiles of the cross-sectional lines of the upper solid mold 72 and the lower solid mold 73 include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

[0119] In the present invention, the ratio of the curvature R of the cross-section of the upper solid mold 72 and the lower solid mold 73 at the same stacking position may be in the range of 0.9 to 1.1.

[0120] In the present invention, the relative surfaces of the upper curing mold 72 and / or the lower curing mold 73 of the cold curing unit have an uneven structure, and the height difference between the highest point and the lowest point of the uneven structure ranges from 1μm to 50μm. Such a mold structure is more conducive to fixing the dimming film during the cold curing process and preventing displacement between the dimming film and the mold surface.

[0121] In the present invention, the lower curing mold 73 of the cold curing unit is densely covered with vacuum holes with a pore size of less than 2 mm. The lower curing mold 73 is connected to a second vacuum system, and the second vacuum system performs vacuuming through the vacuum holes on the lower curing mold 73, so that the dimming film can be further fitted to the surface of the lower curing mold 73 by vacuuming when the dimming film is cold cured.

[0122] As shown in Figures 4 and 7 , the manufacturing apparatus for the curved dimming film provided by the present invention may further include a second pressing drive device 71. The second pressing drive device 71 is connected to an upper solidifying mold 72 and is used to drive the upper solidifying mold 72 to press the upper solidifying mold 72 onto a lower solidifying mold 73, thereby cold-curing the curved dimming film from the cold conveyor unit. The lower solidifying mold 73 is fixedly positioned. The second pressing drive device 71 uses compressed air as a driving force.

[0123] During specific operation, the parameter settings of the pulse heat shock unit, the heat transfer unit, the hot pressing molding unit and the first pressing drive device are as described above. The temperature range of the cold transfer unit can be set to be lower than 40°C, and the cold transfer unit is set to transfer the curved dimming film completed from the hot pressing molding unit to the cold shock curing unit within 2s to 50s; in the cold shock curing unit, the temperature range of the upper solid mold 72 can be set to be lower than 40°C, and the temperature range of the lower solid mold 73 can be set to be lower than 40°C. The upper solid mold 72 and the lower solid mold 73 are set to perform cold shock curing treatment on the curved dimming film from the cold transfer unit for 30s to 600s; the relative pressure range generated by the second pressing drive device 71 driving the upper solid mold 72 to press on the lower solid mold 73 can be set to 0.05MPa to 1.5MPa; the relative pressure of the negative pressure provided by the second vacuum system can be set to be lower than -0.02MPa.

[0124] Furthermore, when the cold curing unit is working, the temperature range of the upper curing mold 72 can be set to below 30°C, and the temperature range of the lower curing mold 73 can be set to below 30°C. The upper curing mold 72 and the lower curing mold 73 are set to cold cure the curved dimming film from the cold transfer unit for 50s to 500s.

[0125] Furthermore, during specific operation, the relative pressure generated by the second pressing driving device 71 driving the upper fixing mold 72 to press on the lower fixing mold 73 can be set to a range of 0.2 MPa to 1.2 MPa.

[0126] In the present invention, the first vacuum pumping system and the second vacuum pumping system can be the same vacuum pumping system or different vacuum pumping systems, depending on the specific situation.

[0127] In the present invention, the compressed air of the first pressing drive device 61 and the compressed air of the second pressing drive device 71 can be provided by the same compressed air system or by different compressed air systems, depending on the specific situation.

[0128] Based on the manufacturing apparatus for the curved dimming film provided by the present invention, it can be understood that the method for manufacturing the curved dimming film using the manufacturing apparatus provided by the present invention is to prepare the flat dimming film by sequentially subjecting the film to pulse thermal shock and hot pressing, wherein the first pulse thermal shock is performed in a pulse thermal shock unit, and the second hot pressing is performed in a hot pressing unit. Furthermore, optionally, after the pulse thermal shock and hot pressing steps, a third cold shock curing step may be included, and the third cold shock curing step may be performed in the cold shock curing unit.

[0129] Considering that a curved dimming film includes a first transparent substrate, a first transparent conductive layer formed on the first transparent substrate, a second transparent substrate, a second transparent conductive layer formed on the second transparent substrate, the first and second transparent conductive layers being arranged opposite each other, and a dimming active layer disposed between the first and second transparent conductive layers, wherein the dimming active layer is selected from at least one of a suspended particle dimming active layer, a polymer dispersed liquid crystal dimming active layer, and an electro-variable dimming active layer. The present invention, through precise control of the pulse thermal shock and hot pressing molding conditions of the flat dimming film, ensures that the dimming active layer in the dimming film is not affected by high temperatures, while simultaneously ensuring that the transparent substrates on both sides of the film are softened, thereby achieving a curved dimming film with a predetermined curvature function θ.

[0130] Furthermore, the curved dimming film with a predetermined curved surface function θ obtained by the manufacturing equipment provided by the present invention can be used to prepare curved dimming glass. Specifically, the curved glass, the curved dimming film, and the interlayer are stacked according to the structure of the curved dimming glass, and then laminated to obtain the curved dimming glass.

[0131] As we all know, curved surface properties are quite complex. The surface function θ defined in this invention is intended to describe these properties simply and clearly through this parameter. The starting point of this invention is to provide equipment for manufacturing curved dimming films. The obvious application of curved dimming films is to manufacture curved glass, and a more specific application is the manufacture of hyperbolic automotive skylight dimming glass.

[0132] Furthermore, due to the difficulty in processing curved glass, the curved surface of the manufactured curved dimming glass rarely has surface convexities or concavities.

[0133] Furthermore, in practical applications, considering aesthetic requirements, curved switchable glass often has a certain degree of symmetry, and the undulations of the curved surface are continuous and gentle.

[0134] Furthermore, in practical applications, considering the economy and processing difficulty, the curved surface of the curved dimming glass is usually not too complicated.

[0135] Furthermore, for a simple curved dimming glass, such as a hemispherical surface, the top view is a circle, and the cross-sectional view in the XX direction and the cross-sectional view in the YY direction are both a circular arc (refer to FIG2 ), R max =R min > 0. Such a surface can be described by the surface function θ to give a specific surface situation.

[0136] Furthermore, for simple curved dimming glass, refer to Figure 2, R max =R min > 0. Such a surface can be described by the surface function θ to give a specific surface situation.

[0137] Furthermore, for some simple curved surfaces, such as single curved surfaces, the top view is shown in Figure 1, the cross-sectional profile of the section line in the XX direction is a circular arc, as shown in Figure 2, the cross-sectional profile of the section line in the YY direction is a straight line, α is 90°, R max >0, R min = 0. Such a surface can be described by a surface function θ to form a specific surface.

[0138] Furthermore, single curved surfaces have at least two planes of symmetry, and spheres have infinitely many planes of symmetry. These have been discussed above and will not be included here in the category of simple surfaces with symmetry. Simple surfaces with symmetry, such as polyhedral surfaces with at least two planes of symmetry, are often rectangular or regular polygonal when viewed from above, and their cross-sectional profiles are circular arcs.

[0139] Furthermore, specifically for the hyperbolic automotive sunroof dimming glass, the top view generally resembles a rectangle, and the height of the sunroof dimming glass increases as it moves toward the center. For such a curved sunroof dimming glass, in order to more simply and clearly illustrate the surface characteristics of the curved dimming glass, the calculation method of the surface function θ can be further simplified. That is, the curvature R of the cross-section of a line parallel to any two sides of the rectangle and perpendicular to each other, passing through the center of gravity of the curved dimming glass and penetrating the laminated structure of the curved dimming glass, is used for calculation. This makes the description of the surface characteristics simple and clear. The curvature R of the cross-section of the XX line is denoted as R X-X , the curvature R of the cross section of the YY section line is denoted as R Y-Y In the specific example of the present invention, this simplified method is used to describe the surface characteristics of the hyperbolic automobile skylight dimming glass. X-X 、R Y-Y >0, then the surface function θ=(R X-X +R Y-Y ) / 2. XX points to the forward and backward direction of the vehicle, and YY points to the width direction of the vehicle body. Generally, the curvature R of the cross section of the XX cross section line is greater than the curvature R of the cross section of the YY cross section line.

[0140] From the definition of the surface function θ above, it can be seen that for the same surface function θ, a single-curved surface is more curved than a double-curved surface. It is well known that double-curved smart glass is more difficult to avoid wrinkling than single-curved smart glass. Clearly, the surface characteristics expressed by the surface function θ of the present invention are more reasonable than those expressed by a single curvature R. The fundamental reason is that the surface function θ takes into account the characteristics of double-curved surfaces while also considering more complex surfaces. In other words, the surface function θ fully accounts for the hyperbolic nature of automotive skylight smart glass.

[0141] From the above application scenarios of the curved dimming film, it can be seen that the shape of the curved dimming glass in actual application is not particularly complicated. Specifically, for the present invention, the curved surface of the mold is not particularly complicated.

[0142] In the present invention, the concepts of upper forming mold and lower forming mold merely indicate their relative relationship and are not limiting. They do not necessarily need to be in an up-down relationship; they can be in a front-to-back, left-to-right, or other orientations. Similarly, the concepts of upper solidifying mold and lower solidifying mold merely indicate their relative relationship and are not limiting. They do not necessarily need to be in an up-to-down relationship; they can be in a front-to-back, left-to-right, or other orientations. Furthermore, the lower forming mold and lower solidifying mold can be densely covered with vacuum ducts with a diameter of 2 mm or less, or the upper forming mold and upper solidifying mold can be densely covered with vacuum ducts with a diameter of 2 mm or less, but not both.

[0143] In the present invention, the working surfaces of the upper forming mold, the lower forming mold, the upper solid mold, and the lower solid mold can be convex or concave, but the working surfaces of the upper forming mold and the lower forming mold must correspond, that is, if one is convex, the other is concave; the working surfaces of the upper solid mold and the lower solid mold must correspond, that is, if one is convex, the other is concave; the concave and convex directions of the working surfaces of the forming mold and the solid mold do not have to be consistent, that is, when the working surface of the upper forming mold is convex, the working surface of the upper solid mold can be convex or concave, but the size and shape of the working surfaces of the molds should match, that is, the surface function θ needs to be equal.

[0144] In the present invention, after a flat dimming film is subjected to pulse heat shock and hot pressing, the dimming performance T of the curved dimming film is measured as follows: 16 points are evenly selected per square meter of the curved dimming film, and the visible light transmittance at these 16 points is measured without power, recorded as Toff1 to Toff16. The curved dimming film is then powered with a corresponding operating power supply and the visible light transmittance at these 16 points is measured, recorded as Ton1 to Ton16. ΔT is then calculated for each point, i.e., ΔT1 = Ton1 - Toff1, and so on. The maximum ΔT is recorded as ΔTmax, and the minimum ΔT is recorded as ΔTmin. Thus, T = (ΔT1 + ΔT2 + ΔT3 ... + ΔT16) / 16. The dimming uniformity U of the curved dimming film is measured as follows: U = (ΔTmax - ΔTmin) / T, where U ≤ 5% is considered "normal" and U > 5% is considered "abnormal." 16 points are evenly selected on each square meter of the curved dimming film to test and calculate the dimming performance T and dimming uniformity U. It is not mandatory to select only 16 points. If the curved dimming film area is smaller or larger, the number of test points can be adjusted, as long as the selected points can illustrate the performance of the curved dimming film. Obviously, at least 2 test points are required. The working power supply of different curved dimming films is different. For example, suspended particle curved dimming film can generally be connected to 110V, 60Hz AC, polymer dispersed liquid crystal curved dimming film can generally be connected to 60V, 60Hz AC, and electrochromic curved dimming film can generally be connected to 3V DC. The specific test should be carried out according to the product requirements of the flat dimming film.

[0145] In this application, the measuring methods of dimming performance T and dimming uniformity U of curved dimming glass are the same as those of curved dimming film, and are not described here in detail.

[0146] The present invention uses curved glass corresponding to the curved dimming film to manufacture a curved dimming film. If the curved surfaces of the curved dimming film and the curved glass are similar, that is, the curves of the cross sections of any corresponding section lines on the curved surface are similar curves, then the curved dimming film and the curved glass are in the most ideal bonding state. However, in this application, such a perfect bonding is not required. In this application, the preparation method of the curved dimming glass provides a curved dimming film having a surface function θ in the range of 0 mm / m to 300 mm / m that is bonded to the curved glass. As is well known, the area of ​​the curved dimming film should match the curved glass. Obviously, according to the definition of the surface function θ of the present invention, two surfaces with equal surface functions θ may have unequal surface areas. The bonding mentioned in this application has three meanings that must be met simultaneously: 1. The area of ​​the curved dimming film is equivalent to that of the curved glass, meeting the requirements of general dimming glass; 2. The surface function θ of the curved dimming film ranges from 20 mm / m to 300 mm / m; 3. The ratio of the curvature R of the curved glass in the cross-section of the cross-section line of the same laminated structure to the curvature R of the corresponding curved dimming film is between 0.7 and 1.3. The measurement method is to divide the curved glass and the curved dimming film into 25 cross-section lines, calculate the ratio of the curvature R of the curved glass in each cross-section to the curvature R of the corresponding curved dimming film, and use the minimum and maximum two values ​​in this group of 25 values ​​as the starting value and the ending value, which are recorded as the numerical range of the ratio of the curvature R of the curved glass in the cross-section line of the cross-section of the same laminated structure of the curved dimming glass to the curvature R of the corresponding curved dimming film.

[0147] The present invention will be further described below by way of examples.

[0148] [Example 1] Manufacturing a hyperbolic dimming film

[0149] A planar suspended particle dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 40 mm / m, and the transition time from the pulsed thermal shock step to the hot pressing step was 50 seconds. The resulting curved dimming film had a surface function θ of 35 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately an elliptical arc, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0150] [Example 2] Manufacturing a hyperbolic dimming film

[0151] A planar suspended particle dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 83 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 40 seconds. The resulting curved dimming film had a surface function θ of 76 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately circular, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0152] [Example 3] Manufacturing a hyperbolic dimming film

[0153] A planar suspended particle dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 168 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 30 seconds. The resulting curved dimming film had a surface function θ of 150 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0154] [Example 4] Manufacturing a hyperbolic dimming film

[0155] A planar electrochromic dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 85 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 50 seconds. The resulting curved dimming film had a surface function θ of 71 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately an elliptical arc, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0156] [Example 5] Manufacturing a hyperbolic dimming film

[0157] A planar electrochromic dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 55 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 50 seconds. The resulting curved dimming film had a surface function θ of 48 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately circular, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0158] [Example 6] Manufacturing a hyperbolic dimming film

[0159] A planar electrochromic dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 285 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 10 seconds. The resulting curved dimming film had a surface function θ of 262 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0160] [Example 7] Manufacturing a hyperbolic dimming film

[0161] A planar polymer-dispersed liquid crystal dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 30 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 25 seconds. The resulting curved dimming film had a surface function θ of 26 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately an elliptical arc, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0162] [Example 8] Manufacturing a hyperbolic dimming film

[0163] A planar polymer-dispersed liquid crystal dimming film was subjected to pulsed thermal shock and hot pressing. The surface function θ of the upper and lower molding dies during the hot pressing process was 204 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 5 seconds. The resulting curved dimming film had a surface function θ of 185 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately circular, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 1.

[0164] [Example 9] Manufacturing a hyperbolic dimming film

[0165] A planar polymer-dispersed liquid crystal dimming film was subjected to pulsed thermal shock, hot pressing, and cold curing to obtain a curved dimming film with a surface function θ of 290 mm / m. The cold curing conditions were: 20°C, 0.5 MPa relative pressure, and 150 seconds in the mold. The surface functions θ of the upper and lower molding dies during hot pressing were 295 mm / m, and the surface functions θ of the upper and lower curing dies during cold curing were 295 mm / m. The transition time from the pulsed thermal shock step to the hot pressing step was 10 seconds, and the transition time from the hot pressing step to the cold curing step was 10 seconds. As shown in Figure 1, the film is approximately rectangular. The cross-sectional profile along the XX and YY directions is approximately an elliptical arc, as shown in Figure 2. The dimming performance T and dimming uniformity U of the film were tested. Specific parameters are shown in Table 1.

[0166] [Example 10] Manufacturing a hyperbolic dimming film

[0167] Similar to Example 3, the curved dimming film, after pulse heat shock and hot pressing, was quickly placed in a cold curing mold and cured at 30°C and a relative pressure of 0.5 MPa for 100 seconds. The surface function θ of the upper and lower curing molds during the cold curing process was 168 mm / m. The resulting curved dimming film had a surface function θ of 162 mm / m, as shown in Figure 1. The film is approximately rectangular, and the cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 2.

[0168] [Example 11] Manufacturing a hyperbolic dimming film

[0169] Similar to Example 6, the curved dimming film, after pulse heat shock and hot pressing, was quickly placed in a cold curing mold and cured at 10°C and a relative pressure of 1.0 MPa for 200 seconds. The surface function θ of the upper and lower curing molds during the cold curing process was 285 mm / m, resulting in a curved dimming film with a surface function θ of 276 mm / m. As shown in Figure 1, the film is approximately rectangular. The cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 2.

[0170] [Example 12] Manufacturing a hyperbolic dimming film

[0171] Similar to Example 3, except that the surface function θ of the upper and lower molding dies during hot pressing was set to 22 mm / m. The resulting curved dimming film had a surface function θ of 20 mm / m, as shown in Figure 1 , and was approximately rectangular. The cross-sectional profile along the XX and YY directions was approximately parabolic, as shown in Figure 2 . The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 2.

[0172] [Example 13] Manufacturing a hyperbolic dimming film

[0173] Similar to Example 3, except that the surface function θ of the upper and lower molding dies during hot pressing was set to 15 mm / m, resulting in a curved dimming film with a surface function θ of 14 mm / m. As shown in Figure 1 , the film is approximately rectangular. The cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2 . The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 2.

[0174] [Example 14] Manufacturing a hyperbolic dimming film

[0175] Similar to Example 3, except that the surface function θ of the upper and lower molding dies during hot pressing was set to 5 mm / m, resulting in a curved dimming film with a surface function θ of 4 mm / m. As shown in Figure 1, the film is approximately rectangular. The cross-sectional profile along the XX and YY directions is approximately parabolic, as shown in Figure 2. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 2.

[0176] [Example 15] Manufacturing a hyperbolic dimming film

[0177] The same method as in Example 10 was used, except that the surface function θ of the upper and lower molding dies used for hot pressing, and the upper and lower curing dies used for cold curing, was set to 5 mm / m. The resulting curved dimming film, with a surface function θ of 5 mm / m, was approximately rectangular, as shown in Figure 1 . The cross-sectional profile along the XX and YY directions was approximately parabolic, as shown in Figure 2 . The dimming performance T and dimming uniformity U were also tested. Specific parameters are shown in Table 2.

[0178] [Example 16] Manufacturing a hyperbolic dimming film

[0179] The same method as in Example 10 was used, except that the surface function θ of the upper and lower molding dies used for hot pressing, and the upper and lower curing dies used for cold curing, was set to 3 mm / m. The resulting curved dimming film, with a surface function θ of 3 mm / m, was approximately rectangular, as shown in Figure 1 . The cross-sectional profile along the XX and YY directions was approximately parabolic, as shown in Figure 2 . The dimming performance T and dimming uniformity U were also tested. Specific parameters are shown in Table 2.

[0180] [Comparative Example 1] A hyperbolic dimming film

[0181] Similar to Example 2, except that the first pulse heat shock duration was replaced with 100 seconds instead of 3 seconds, a curved dimming film with a surface function θ of 76 mm / m was obtained. Its dimming performance T and dimming uniformity U were tested. Because the first pulse heat shock duration exceeded 60 seconds, reaching 100 seconds, the dimming performance T of the curved dimming film was reduced to only 15.6%, and the dimming uniformity U was abnormal. Specific parameters are shown in Table 3.

[0182] [Comparative Example 2] A hyperbolic dimming film

[0183] Similar to Example 3, except that the second hot-pressing temperature was 30°C instead of 120°C, a curved dimming film with a surface function θ of 18 mm / m was obtained. Its dimming performance T and dimming uniformity U were tested. However, since the second hot-pressing temperature was only 30°C, lower than 50°C, the surface function θ of the prepared curved dimming film was too small, at only 18 mm / m. Specific parameters are shown in Table 3.

[0184] [Comparative Example 3] A hyperbolic dimming film

[0185] Similar to Example 4, except that the first pulse heat shock temperature (250°C) was replaced with 80°C, a curved dimming film with a surface function θ of 19 mm / m was obtained. Its dimming performance T and dimming uniformity U were tested. However, since the first pulse heat shock temperature was only 80°C, lower than 120°C, the surface function θ of the prepared curved dimming film was too small, at only 19 mm / m. Specific parameters are shown in Table 3.

[0186] [Comparative Example 4] A hyperbolic dimming film

[0187] Similar to Example 5, except that the second hot pressing step lasted 125 seconds instead of 25 seconds, resulting in a curved dimming film with a surface function θ of 48 mm / m. Its dimming performance T and dimming uniformity U were tested. Because the second hot pressing step lasted 125 seconds, exceeding 90 seconds, the dimming performance T of the curved dimming film was reduced to only 10.1%, and the dimming uniformity U was abnormal. Specific parameters are shown in Table 3.

[0188] [Comparative Example 5] A hyperbolic dimming film

[0189] Similar to Example 7, except that the relative pressure in the second hot pressing step was replaced with 2.0 MPa instead of 0.4 MPa, a curved dimming film with a surface function θ of 26 mm / m was obtained. Its dimming performance T and dimming uniformity U were tested. Because the relative pressure in the second hot pressing step exceeded 1.5 MPa, reaching 2.0 MPa, the dimming performance T of the curved dimming film was reduced to only 12.1%, and the dimming uniformity U was abnormal. Specific parameters are shown in Table 3.

[0190] [Comparative Example 6] A hyperbolic dimming film

[0191] Similar to Example 8, except that the first pulse heat shock temperature was replaced with 300°C in the first step (240°C), a curved dimming film with a surface function θ of 195 mm / m was obtained. Its dimming performance T and dimming uniformity U were tested. Because the first pulse heat shock temperature was lower than 280°C and reached 300°C, the dimming performance T of the curved dimming film was reduced to only 17.6%, and the dimming uniformity U was abnormal. Specific parameters are shown in Table 3.

[0192] [Comparative Example 7] A hyperbolic dimming film

[0193] The same method as in Example 3 was used, except that the first step of pulse thermal shock and heat transfer was omitted. Dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 3. Due to the omission of the first step of pulse thermal shock, the surface function θ was too small, only 13 mm / m.

[0194] [Comparative Example 8] A hyperbolic dimming film

[0195] The same method as in Example 3 was used, except that the first step of pulsed thermal shock and heat transfer was omitted, and the second step of hot pressing was performed at a temperature of 280°C. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 3. Due to the omission of the first step of pulsed thermal shock and the excessively high temperature in the second step of hot pressing, the dimming performance T of the curved dimming film was reduced to only 15.3%, and the dimming uniformity U was abnormal.

[0196] [Example 17] A hyperbolic car skylight dimming glass

[0197] The curved dimming film of [Example 1], EVA film, and ordinary white glass are used, and the curved surface function θ is 35 mm / m.

[0198] After stacking the layers according to the structure of the dimming glass, lamination was carried out in an autoclave; the lamination conditions were: temperature 110°C, vacuuming for 10 minutes, gradually increasing the pressure to 450kPa, and delaying for 60 minutes.

[0199] A curved dimming glass was prepared. The dimming glass had a normal appearance without wrinkles, and its dimming performance T and dimming uniformity U were tested. The specific parameters are shown in Table 4.

[0200] [Example 18] A hyperbolic car skylight dimming glass

[0201] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 2], the EVA film is replaced by PVB film, and the ordinary white glass is replaced by brown glass. The surface function θ is 70 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0202] [Example 19] A hyperbolic car skylight dimming glass

[0203] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 3], the EVA film is replaced by a TPU film, and the ordinary white glass is replaced by a PC board. The surface function θ is 155 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0204] [Example 20] A hyperbolic car skylight dimming glass

[0205] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 4], and the curved surface function θ of ordinary white glass is 71 mm / m. The dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0206] [Example 21] A hyperbolic car skylight dimming glass

[0207] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 5], the EVA film is replaced by PVB film, and the ordinary white glass is replaced by IR blocking glass. The surface function θ is 50 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0208] [Example 22] A hyperbolic car skylight dimming glass

[0209] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 6], the EVA film is replaced by a TPU film, and the ordinary white glass is replaced by a PC board. The surface function θ is 265 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0210] [Example 23] A hyperbolic car skylight dimming glass

[0211] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 7], the curved function θ of ordinary white glass is 30 mm / m, and its dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0212] [Example 24] A hyperbolic car skylight dimming glass

[0213] The same as [Example 17], except that the curved dimming film of [Example 1] is replaced by the curved dimming film of [Example 8], the EVA film is replaced by a PVB film, and the ordinary white glass is replaced by a PMMA plate. The surface function θ is 180 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0214] [Example 25] A hyperbolic car skylight dimming glass

[0215] The same as [Example 17], except that the curved dimming film in [Example 1] is replaced by the curved dimming film in [Example 9], the EVA film is replaced by a TPU film, and the ordinary white glass is replaced by a PC board. The surface function θ is 290 mm / m, and the dimming performance T and dimming uniformity U are tested. The specific parameters are shown in Table 4.

[0216] [Comparative Example 9] A flat dimming glass

[0217] Similar to Example 17, except that ordinary white glass was flat (curvature function θ was 0), the dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 4. The edges of the dimming glass exhibited distinct wrinkles, as shown in Figure 8, where arrows indicate wrinkles. This indicates that wrinkles are more likely to form when using flat glass and curved dimming film to create dimming glass.

[0218] [Comparative Example 10] A hyperbolic dimming glass

[0219] The same method as in Example 17 was used, except that the curved dimming film in Example 1 was replaced with a flat dimming film (curvature function θ was 0). The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 4. The edges of the dimming glass exhibited obvious wrinkles, as shown in Figure 9, where the arrows indicate wrinkles. This indicates that dimming glass fabricated using a flat dimming film and curved glass is prone to wrinkles.

[0220] [Comparative Example 11] A hyperbolic dimming glass

[0221] The same method as in Example 17 was used, except that the curvature function θ of the ordinary white glass was set to 50, and the curvature ratio R of the curved glass / curvature ratio R of the curved switchable film was set between 1.10 and 1.63. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 4. The edges of the switchable glass exhibited noticeable wrinkles, as shown in Figure 10. Arrows in the figure indicate wrinkles. This indicates that wrinkles are more likely to occur when the curvature ratio R of the curved glass / curvature ratio R of the curved switchable film exceeds 0.7 to 1.3.

[0222] [Comparative Example 12] A hyperbolic dimming glass

[0223] The same test as in Example 17 was performed, except that the curvature function θ for the ordinary white glass was 50, while the curvature function for the curved switchable film was 80. The curvature ratio R of the curved glass / curvature R of the curved switchable film ranged from 0.45 to 0.81. The dimming performance T and dimming uniformity U were tested. Specific parameters are shown in Table 4. The edges of the switchable glass exhibited noticeable wrinkles, as shown in Figure 11. Arrows in the figure indicate wrinkles. This indicates that wrinkles are more likely to occur when the curvature ratio R of the curved glass / curvature R of the curved switchable film exceeds 0.7 to 1.3.

[0224] Table 1 Parameters of curved dimming film

[0225] Note: X indicates absence, and relative negative pressure indicates the relative pressure of the negative pressure provided by the vacuum system.

[0226] Table 2 Parameters of curved dimming film

[0227] Note: X indicates absence, and relative negative pressure indicates the relative pressure of the negative pressure provided by the vacuum system.

[0228] Table 3 Parameters of curved dimming film

[0229] Note: X indicates absence, and relative negative pressure indicates the relative pressure of the negative pressure provided by the vacuum system.

[0230] Table 4 Parameters of curved dimming glass

[0231] Note: X indicates not applicable.

[0232] Comparing [Comparative Example 1] and [Example 2], it can be seen that extending the first pulse heat shock time from 3 seconds to 100 seconds resulted in a 15.6% decrease in the dimming performance T of the curved dimming film, with abnormal dimming uniformity U and uneven local dimming of the film. Comparing [Comparative Example 2] and [Example 3], it can be seen that reducing the upper molding die temperature from 120°C to 30°C in the second hot pressing step resulted in the dimming film's surface function θ falling below 20 mm / m, to only 18 mm / m. Comparing [Comparative Example 3] and [Example 4], it can be seen that reducing the upper heating module temperature from 250°C to 80°C in the first pulse heat shock step resulted in a 19 mm / m decrease in the dimming performance θ of the curved dimming film. Comparing [Comparative Example 4] and [Example 5], it can be seen that extending the second hot pressing time from 25 seconds to 125 seconds resulted in a 10.1% decrease in the dimming performance T of the curved dimming film, with abnormal dimming uniformity U and uneven local dimming of the film. Comparing [Comparative Example 5] and [Example 7], it can be seen that increasing the relative pressure in the second hot pressing step from 0.4MPa to 2.0MPa caused the dimming performance T of the curved dimming film to decrease by only 12.1%, the dimming uniformity U was abnormal, and the dimming film had localized dimming unevenness. Comparing [Comparative Example 6] and [Example 8], it can be seen that increasing the temperature of the upper heating module from 240°C to 300°C in the first pulse heat shock caused the dimming performance T of the curved dimming film to decrease by only 17.6%, the dimming uniformity U was abnormal, and the dimming film had localized dimming unevenness. Comparing [Comparative Example 7] and [Example 3], it can be seen that without the first pulse heat shock, the surface function θ of the curved dimming film was lower, only 13 mm / m. Comparing [Comparative Example 8] and [Example 3], it can be seen that without the first-step pulse heat shock and raising the temperature of the upper molding mold in the second-step hot pressing molding to 280°C, the surface function θ of the obtained curved dimming film is normal. However, due to the excessively high temperature of the second-step hot pressing molding, the dimming performance T of the curved dimming film is attenuated to only 15.3%, the dimming uniformity U is abnormal, and the local dimming of the dimming film is uneven.

[0233] As can be seen from the above, in the process of pulse heat shock and hot pressing, each process parameter is crucial. Without the first step of pulse heat shock, it is difficult to prepare a curved dimming film with dimming performance T and dimming uniformity U. The normal surface function θ ranges from 20 mm / m to 300 mm / m.

[0234] By comparing [Example 3] and [Example 10], and [Example 6] and [Example 11], it can be seen that by adding a cold curing step, a curved dimming film with a slightly higher surface function θ can be prepared. This can prevent the curved dimming film formed by hot pressing from rebounding and deforming during the natural cooling process after the molding pressure is released at a high temperature, resulting in a decrease in the surface function θ.

[0235] Comparing [Comparative Example 9] with [Example 17] shows that wrinkles are produced when flat glass is laminated with a curved smart film to produce flat smart glass. Comparing [Comparative Example 10] with [Example 17] shows that wrinkles are produced when curved glass is laminated with a flat smart film to produce curved smart glass. Comparing [Comparative Examples 11-12] with [Examples 17-25] shows that wrinkles are produced when the curvature R of the curved glass / the curvature R of the curved smart film exceeds the range of 0.7-1.3 when producing curved smart glass.

[0236] As can be seen from the above, in the process of manufacturing curved dimming glass, the curved dimming film needs to use the corresponding curved glass, or in other words, the curved glass needs to use the corresponding curved dimming film.

[0237] In the present invention, the dimming performance T of curved smart glasses made with the same type of curved smart film varies significantly. For example, the dimming performance T of [Example 17] is 49.2%, while the dimming performance T of [Example 18] is only 31.4%. This is due to the different curved glass used in the production of the curved smart glasses. As is well known, the visible light transmittance of curved glass of different colors varies, and some vary significantly. However, in some scenarios, a dimming performance T of ≥ 5% for curved smart glasses can meet practical requirements.

[0238] It can be seen from [Example 13] and [Example 14] that by using the manufacturing equipment for the curved dimming film described in this application, after pulse heat shock and hot pressing of the flat dimming film, a curved dimming film with a surface function θ less than 20 mm / m can be prepared. The surface function θ of the curved dimming film prepared in [Example 13] is 14 mm / m, and the surface function θ of the curved dimming film prepared in [Example 14] is 4 mm / m.

[0239] It can be seen from [Example 15] and [Example 16] that by using the manufacturing equipment for the curved dimming film described in this application, after pulse heat shock, hot pressing molding and cold shock curing of the flat dimming film, a curved dimming film with a surface function θ less than 20 mm / m can be prepared. The surface function θ of the curved dimming film prepared in [Example 15] is 5 mm / m, and the surface function θ of the curved dimming film prepared in [Example 16] is 3 mm / m.

[0240] Obviously, the manufacturing equipment of the curved dimming film provided in the present application is capable of preparing a curved dimming film with a curved surface function θ ranging from 0 mm / m to 300 mm / m.

[0241] In summary, the manufacturing equipment of a curved dimming film described in the present invention prepares a curved dimming film with a predetermined surface function θ by performing pulse heat shock and hot pressing molding on a flat dimming film, and further uses the corresponding curved glass to prepare the curved dimming glass. This can avoid the appearance defect of wrinkles in the dimming film when using a flat dimming film to prepare the curved dimming glass, which is of great significance.

Claims

1. A manufacturing device for a curved dimming film, characterized in that: include: A feeding unit, used for providing a flat dimming film; A pulse heat shock unit, used for performing a pulse heat shock on the planar dimming film; A heat transfer unit, used for heat-insulating and transferring the planar dimming film completed by the pulse heat shock unit; The hot pressing and forming unit is used for hot pressing and forming the flat dimming film from the heat transfer unit to form a curved dimming film.

2. The manufacturing equipment of the curved dimming film according to claim 1, characterized in that: The pulse heat shock unit includes an upper heating module and a lower heating module, wherein the upper heating module is used to heat the upper surface of the planar dimming film from the loading unit, and the lower heating module is used to heat the lower surface of the planar dimming film from the loading unit.

3. The manufacturing equipment of the curved dimming film according to claim 2, characterized in that: The upper heating module and the lower heating module can be independently controlled in heating temperature.

4. The manufacturing equipment of the curved dimming film according to claim 2, characterized in that: The pulse heat shock unit also includes a sample rack arranged between the upper heating module and the lower heating module, the sample rack is used to place the planar dimming film from the loading unit, the sample rack is within 2cm to 10cm from the upper heating module, and the sample rack is within 2cm to 10cm from the lower heating module.

5. The manufacturing equipment of the curved dimming film according to claim 1, characterized in that: The hot press molding unit includes an upper molding die and a lower molding die, the sizes and shapes of the upper molding die and the lower molding die match each other, the upper molding die is used to hot press mold the upper surface of the planar dimming film from the heat transfer unit, and the lower molding die is used to hot press mold the lower surface of the planar dimming film from the heat transfer unit.

6. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The upper molding die and the lower molding die can be individually controlled in heating temperature.

7. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The surface function θ of the upper molding die and the lower molding die ranges from 0 mm / m to 300 mm / m.

8. The manufacturing equipment of the curved dimming film according to claim 7, characterized in that: The surface function θ of the upper molding die and the lower molding die further ranges from 35 mm / m to 250 mm / m.

9. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The cross-sectional profiles of the cross-sectional lines of the upper molding die and the lower molding die include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

10. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The ratio of the curvature R of the cross section of the section line of the upper molding die and the lower molding die at the same stacking position is in the range of 0.9 to 1.

1.

11. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The opposing surfaces of the upper molding die and / or the lower molding die have an uneven structure.

12. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The lower molding die is densely covered with vacuum channels with a hole diameter of less than 2 mm.

13. The manufacturing equipment of curved dimming film according to claim 12, characterized in that: The lower molding die is connected to a first vacuum pumping system, and the first vacuum pumping system performs vacuum pumping through a vacuum pumping channel on the lower molding die.

14. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The manufacturing equipment also includes a first pressing drive device, which is connected to the upper molding die and is used to drive the upper molding die to be pressed on the lower molding die to perform hot pressing molding on the planar dimming film from the heat transfer unit. The lower molding die is fixed.

15. The manufacturing equipment of the curved dimming film according to claim 5, characterized in that: The pulse heat shock unit includes an upper heating module and a lower heating module, wherein the upper heating module is used to heat the upper surface of the planar dimming film from the loading unit, and the lower heating module is used to heat the lower surface of the planar dimming film from the loading unit; The lower molding die is densely covered with vacuum channels with a hole diameter of less than 2 mm; the lower molding die is connected to a first vacuum system, and the first vacuum system performs vacuuming through the vacuum channels on the lower molding die; The manufacturing equipment further includes a first pressing driving device, which is connected to the upper molding die and is used to drive the upper molding die to be pressed on the lower molding die to perform hot pressing molding on the planar dimming film from the heat transfer unit, and the lower molding die is fixedly arranged; When working: In the pulse thermal shock unit, the temperature range of the upper heating module is set to 120°C to 280°C, the temperature range of the lower heating module is set to 130°C to 290°C, the temperature of the lower heating module is set to be 10°C to 15°C higher than the temperature of the upper heating module, and the upper heating module The heating time of the block and the lower heating module is set to 3s to 60s; The temperature range of the heat transfer unit is set to 70° C. to 130° C., and the heat transfer unit is configured to transfer the planar dimming film after the pulse heat shock unit is completed to the hot pressing molding unit within 2s to 50s; In the hot pressing unit, the temperature range of the upper molding die is set to 50°C to 180°C, the temperature range of the lower molding die is set to 55°C to 185°C, the temperature of the lower molding die is set to be 5°C to 10°C higher than the temperature of the upper molding die, and the upper molding die and the lower molding die are configured to perform hot pressing molding treatment on the planar dimming film from the heat transfer unit for 5s to 90s; The temperature of the upper heating module is set to be at least 20° C. higher than the temperature of the upper molding die; The relative pressure range generated by the first pressing driving device driving the upper molding die to press the lower molding die is set to 0.05 MPa to 1.5 MPa; The relative pressure of the negative pressure provided by the first vacuum system is set to be lower than -0.02 MPa.

16. The manufacturing equipment of the curved dimming film according to claim 15, characterized in that: When working: In the pulse thermal shock unit, the temperature range of the upper heating module is further set to 130°C to 250°C, the temperature range of the lower heating module is further set to 140°C to 260°C, and the heating time of the upper heating module and the lower heating module is further set to 4s to 35s.

17. The manufacturing equipment of the curved dimming film according to claim 15, characterized in that: When working: In the hot press molding unit, the temperature range of the upper molding mold is further set to 80℃~140℃, the temperature range of the lower molding mold is further set to 85℃~145℃, and the upper molding mold and the lower molding mold are configured to perform hot press molding treatment on the planar dimming film from the heat transfer unit for 10s~60s.

18. The manufacturing equipment of curved dimming film according to claim 15, characterized in that: When working: The temperature of the upper heating module is set to be at least 30° C. higher than the temperature of the upper molding die.

19. The manufacturing equipment of the curved dimming film according to claim 15, characterized in that: When working: The relative pressure range generated by the first pressing driving device driving the upper molding die to press the lower molding die is further set to 0.2 MPa to 1.2 MPa.

20. The manufacturing equipment of the curved dimming film according to any one of claims 1 to 19, characterized in that: The manufacturing equipment also includes a material unloading unit for outputting the curved dimming film from the hot pressing molding unit.

21. The manufacturing equipment of curved dimming film according to claim 1, characterized in that: The manufacturing equipment further comprises: A cold transfer unit, used for cooling and transferring the curved dimming film completed by the hot pressing molding unit; A cold curing unit, used for cold curing the curved dimming film from the cold conveying unit; A material unloading unit is used to output the curved dimming film from the cold-curing solid-type unit.

22. The manufacturing equipment of the curved dimming film according to claim 21, characterized in that: The cold-shock curing unit includes an upper curing mold and a lower curing mold, the sizes and shapes of the upper curing mold and the lower curing mold match each other, the upper curing mold is used to cold-shock cure the upper surface of the curved dimming film from the cold conveying unit, and the lower curing mold is used to cold-shock cure the lower surface of the curved dimming film from the cold conveying unit.

23. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The upper solid mold and the lower solid mold can be individually controlled in heating / cooling temperature.

24. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The hot pressing molding unit comprises an upper molding die and a lower molding die, the upper molding die and the lower molding die are matched in size and shape, the upper molding die is used to perform hot pressing molding on the upper surface of the planar dimming film from the heat transfer unit, and the lower molding die is used to perform hot pressing molding on the lower surface of the planar dimming film from the heat transfer unit; The upper molding die in the hot press molding unit matches the size and shape of the upper solid mold in the cold shock solidification unit, and the lower molding die in the hot press molding unit matches the size and shape of the lower solid mold in the cold shock solidification unit.

25. The manufacturing equipment of curved dimming film according to claim 24, characterized in that: The surface functions θ of the upper molding die and the lower molding die in the hot press molding unit, and the upper curing die and the lower curing die in the cold curing unit are equal.

26. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The range of the surface function θ of the upper solid mold and the lower solid mold is 0 mm / m to 300 mm / m.

27. The manufacturing equipment of the curved dimming film according to claim 26, characterized in that: The surface function θ of the upper solid mold and the lower solid mold further ranges from 35 mm / m to 250 mm / m.

28. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The cross-sectional profiles of the cross-sectional lines of the upper solid mold and the lower solid mold include at least one of a circular arc, an elliptical arc, a parabola, and an asymmetric curve.

29. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The ratio of the curvature R of the cross section of the cross-sectional line of the upper solid mold and the lower solid mold at the same stacking position is in the range of 0.9 to 1.

1.

30. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The relative surfaces of the upper solid mold and / or the lower solid mold have an uneven structure.

31. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The lower solid mold is densely covered with vacuum channels with a hole diameter of less than 2 mm.

32. The manufacturing equipment of the curved dimming film according to claim 31, characterized in that: The lower solid mold is connected to a second vacuum pumping system, and the second vacuum pumping system performs vacuum pumping through the vacuum pumping holes on the lower solid mold.

33. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The manufacturing equipment also includes a second pressing drive device, which is connected to the upper solid mold and is used to drive the upper solid mold to be pressed on the lower solid mold to cold-cure the curved dimming film from the cold transfer unit. The lower solid mold is fixed.

34. The manufacturing equipment of the curved dimming film according to claim 22, characterized in that: The lower solid mold is densely covered with vacuum holes with a hole diameter of less than 2 mm; the lower solid mold is connected to a second vacuum system, and the second vacuum system performs vacuuming through the vacuum holes on the lower solid mold; The manufacturing equipment further includes a second pressing driving device, which is connected to the upper solidifying mold and is used to drive the upper solidifying mold to be pressed on the lower solidifying mold to perform cold curing on the curved dimming film from the cold conveying unit, and the lower solidifying mold is fixedly arranged; When working: The temperature range of the cold transfer unit is set to be lower than 40° C., and the cold transfer unit is configured to transfer the curved dimming film completed by the hot pressing molding unit to the cold curing unit within 2s to 50s; In the cold curing unit, the temperature range of the upper curing mold is set to be lower than 40° C. The temperature range of the lower curing mold is set to be lower than 40° C., and the upper curing mold and the lower curing mold are configured to perform cold curing treatment on the curved dimming film from the cold conveying unit for 30s to 600s; The relative pressure range generated by the second pressing driving device driving the upper solid mold to press the lower solid mold is set to 0.05MPa to 1.5MPa; The relative pressure of the negative pressure provided by the second vacuum system is set to be lower than -0.02 MPa.

35. The manufacturing equipment of the curved dimming film according to claim 34, characterized in that: When working: In the cold curing unit, the temperature range of the upper curing mold is further set to be lower than 30°C, and the temperature range of the lower curing mold is further set to be lower than 30°C. The upper curing mold and the lower curing mold are configured to cold cure the curved dimming film from the cold transfer unit for 50s to 500s.

36. The manufacturing equipment of the curved dimming film according to claim 34, characterized in that: The relative pressure range generated by the second pressing driving device driving the upper fixing mold to press on the lower fixing mold is further set to 0.2 MPa to 1.2 MPa.

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