Curved 3D toughened film segmented uniform heat bending forming equipment and forming method thereof

Abstract

The present application relates to glass hot bending forming processing technical field, and disclose a kind of curved surface 3D toughened film segmented type uniform hot bending forming equipment and its forming method, including substrate, in the present application, different curvature area precision temperature control is realized by upper die partition independent heating, matching the different softening needs of center plane area, side edge arc area, four corner area, avoid the softening degree difference of each area of glass, using segmented gradual mold closing pressure mode, according to time sequence step pressure, balance each area stress, avoid corner pressure overload, plane pressure insufficient situation, effectively reduce the internal residual stress of toughened film, abandon the one-size-fits-all mode of global synchronous cooling, using partition gradient annealing cooling mode, different curvature area is set different cooling rate, edge area slow cooling, plane area conventional cooling, match the shrinkage requirement of each area, avoid the problem of overall flatness difference. Through work station interval heat gate plate to block work station heat string temperature, realize the temperature precision control of each area.

Description

Technical Field

[0001] This invention relates to the field of glass hot bending forming technology, specifically to a segmented uniform hot bending forming equipment and forming method for curved 3D tempered film. Background Technology

[0002] 3D curved tempered glass screen protectors, with their high adhesion, excellent visual effect, and superior protective performance, are widely used in the screen protection field of terminal devices such as smartphones, smartwatches, and automotive displays. Currently, the forming of 3D curved tempered glass screen protectors mainly relies on a hot bending process. This involves heating a flat glass blank to a softened state, applying pressure through a mold to conform it to a curved contour, and then cooling and shaping it to obtain the finished product. Existing hot bending forming equipment mostly adopts a production mode of single-stage hot bending with an integrated mold and unified temperature control throughout the furnace. The supporting forming process is mostly an integrated process of simultaneous heating, simultaneous pressing, and simultaneous cooling, which is currently the mainstream production method in the industry. Although the existing integrated hot bending forming process has achieved large-scale production, there are still many unresolved technical defects in practical applications, as follows:

[0003] Different curvature areas of 3D curved tempered glass screen protectors require varying degrees of softening. Under the current overall heating method, uneven heating occurs across different areas, with corners heating up too quickly and flat areas remaining too cold. This leads to significant differences in glass softening, causing molding precision issues such as surface springback, curvature deviations, and edge wrinkles. Furthermore, this results in white edges and bubbles when bonded to the screen. Simultaneously, the overall molding and pressurization method is prone to overloading at corners and insufficient pressure in flat areas, causing residual stress concentration within the tempered glass. This leads to defects such as edge bursting, cracking, and warping during subsequent chemical tempering, significantly reducing product yield and increasing production costs.

[0004] In addition, existing tunnel-type hot bending equipment lacks effective heat insulation and sealing structures between each station, which easily leads to heat cross-contamination between stations, resulting in low temperature control accuracy in each area. At the same time, there is a lack of effective dynamic sealing measures during the movement of the lower mold, resulting in serious heat leakage, which not only affects the stability of the process but also increases the energy consumption of the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a segmented uniform hot bending forming device and its forming method for curved 3D tempered film, which solves the problems of uneven heating, pressure concentration leading to excessive residual stress, and insufficient sealing of the lower mold during the hot bending forming process of existing 3D curved tempered film.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a segmented uniform hot bending forming equipment for curved 3D tempered film, including a substrate, wherein a quick-release assembly and a hot bending assembly are provided on the substrate;

[0007] The hot bending assembly includes an upper template and a lower mold base. Corner modules are slidably connected to the upper template near its four corners. A side module is installed between every two corner modules. The corner modules and side modules are slidably connected below the upper template. Multiple heat conduction holes are evenly opened on the side of the lower mold base. Expansion joints are installed to the upper template near its four corners. Locking rods are fixedly connected to the output ends of the expansion joints. Locking plates are installed to the lower mold base near its four corners. The locking rods are inserted into the locking plates.

[0008] The quick-release assembly includes a sleeve and a top post. The inner wall of the sleeve has two symmetrical telescopic grooves. A telescopic rod is slidably connected in the telescopic groove. The inner end of the telescopic rod extends from the outside of the sleeve through the sleeve wall into the telescopic groove. A sliding rod is fixedly connected to the end of the top post near the sleeve. A first platform is fixedly connected to the end of the sliding rod away from the top post. A locking block is fixedly connected to the end of each telescopic rod near the first platform, and the locking block engages with the first platform.

[0009] Preferably, a first protective box and a second protective box are fixedly connected to the upper surface of the substrate. The side walls of the first protective box and the second protective box are provided with lifting grooves. A heat insulation gate is slidably connected in the lifting groove. Positioning rods are installed near the four corners of the upper mold plate. A material feeding groove is provided in the lower mold base.

[0010] Preferably, the upper ends of the first protective box and the second protective box are both fixedly connected to electric actuators, the output ends of the electric actuators extend into the lifting groove, and the output ends of the electric actuators are fixedly connected to the heat insulation gate.

[0011] Preferably, the substrate has a mounting groove, a sealing box is fixedly connected in the mounting groove, a slide rail is fixedly connected in the sealing box, a threaded seat is slidably connected in the slide rail, and a coil is fixedly connected to the end of the threaded seat away from the slide rail.

[0012] Preferably, a threaded rod is rotatably connected inside the slide rail, the threaded rod is threadedly connected to the threaded seat, and two guide rails are fixedly connected to the upper surface of the base plate, the two guide rails being symmetrically distributed on both sides of the mounting groove.

[0013] Preferably, the outer wall of the guide rail is slidably connected to a carriage, and the upper ends of the two carriages are fixedly connected to a heat insulation pad. The heat insulation pad is fixedly connected to the lower mold base, and a permanent magnet drive block is fixedly connected to the end of the heat insulation pad near the sealing box.

[0014] Preferably, the inner wall of the first protective box is fixedly connected to an exhaust plate and a temperature monitor, the inner wall of the second protective box is fixedly connected to a blower box, the upper surface of the base plate is fixedly connected to an air tank and an air pump, the output end of the air pump is fixedly connected to an air supply pipe, and the air pump and the exhaust plate are connected through the air supply pipe.

[0015] Preferably, a support frame is fixedly connected to the inner wall of the first protective box, a hydraulic rod is fixedly connected to the support frame, a connecting plate is fixedly connected to the output end of the hydraulic rod, and the connecting plate is fixedly connected to the sleeve.

[0016] Preferably, the top column is fixedly connected to the upper template, the outer wall of the sliding rod is slidably connected to a second body, the outer wall of the telescopic rod is fitted with a return spring, and the outer wall of the top column is fitted with a compression spring.

[0017] A method for using a segmented uniform hot bending forming equipment for curved 3D tempered glass film includes the following steps:

[0018] S1. Start the equipment. The electric push rod drives the heat insulation gate on the first protective box to rise and open. After the coil is energized, it forms a magnetic connection with the permanent magnet drive block. Drive the threaded rod to rotate, drive the threaded seat to slide along the slide rail, and then drive the lower mold seat to move, so that the lower mold seat moves out of the outer wall of the first protective box. Put the tempered film raw material to be processed into the material feeding groove of the lower mold seat to complete the positioning and placement of the raw material.

[0019] S2. After placement, drive the lower mold base to move back into the first protective box, operate the electric push rod to drive the heat insulation gate to descend and close, monitor the furnace temperature in real time through the temperature monitor, and at the same time introduce nitrogen into the first protective box to form a basic protective atmosphere; the side modules and corner modules installed on the upper template can realize zoned differentiated temperature control, then the central plane area of ​​the upper template first presses down the heated tempered film material, then the side modules press down the material, and finally the corner modules complete the pressing operation; after pressing is completed, the output end of the telescopic device pushes the locking rod to automatically insert into the locking plate of the lower mold base, realizing the airtight locking of the upper template and the lower mold base;

[0020] S3. The sealed and locked upper template and lower mold base are moved synchronously into the second protective box for cooling. The air blower box in the second protective box is activated to blow out airflow. Multiple heat conduction holes on the side of the lower mold base correspond to the corner module, side module and center plane area respectively. The airflow blown out by the air blower box enters the corresponding heat conduction holes. Through the control system of the heat conduction holes, the corresponding areas are controlled to perform gradient cooling at different speeds.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In this invention, precise temperature control is achieved by independently heating different curvature areas of the upper mold, matching the differentiated softening requirements of the central plane area, the side arc area, and the four corner areas. This avoids differences in the degree of softening of different areas of the glass, eliminates forming defects such as surface springback, curvature deviation, and corner wrinkles, and eliminates white edges and bubbles during bonding. The segmented and progressive mold closing and pressure application method is adopted, with pressure applied step by step according to the time sequence to balance the force on each area, avoiding overload of corner pressure and insufficient pressure on the plane. This effectively reduces the residual stress inside the tempered film and reduces adverse phenomena such as edge bursting, cracking, and warping deformation during the subsequent chemical tempering process.

[0023] 2. This invention abandons the one-size-fits-all approach of simultaneous cooling across the entire surface, instead employing a zoned gradient annealing cooling method. Differentiated cooling rates are set for regions with different curvatures: slow cooling at the edges and conventional cooling in flat areas, matching the shrinkage requirements of each region and avoiding edge warping and poor overall flatness. Simultaneously, the differentiated cooling rate precisely releases residual stress within the glass. Furthermore, thermal barriers at each workstation prevent heat transfer between workstations, achieving precise temperature control in each region. During the lower mold movement, heat loss is effectively reduced, ensuring process stability, lowering equipment energy consumption, and minimizing mold damage from high-temperature heat. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a segmented uniform hot bending forming equipment and forming method for curved 3D tempered film according to the present invention.

[0025] Figure 2 This is a cross-sectional view of the second protective box of the curved 3D tempered film segmented uniform hot bending forming equipment and forming method of the present invention.

[0026] Figure 3 This is a schematic cross-sectional view of the substrate structure of the segmented uniform hot bending forming equipment and forming method for curved 3D tempered film of the present invention.

[0027] Figure 4 This is a cross-sectional view of the sealing box structure of the segmented uniform hot bending forming equipment and forming method for curved 3D tempered film of the present invention.

[0028] Figure 5 This is a schematic diagram of the air pump structure of the segmented uniform hot bending forming equipment and forming method for curved 3D tempered film of the present invention.

[0029] Figure 6 This is a cross-sectional view of the first protective box of the curved 3D tempered film segmented uniform hot bending forming equipment and forming method of the present invention.

[0030] Figure 7This is a schematic diagram of the upper template structure of a segmented uniform hot bending forming equipment and forming method for curved 3D tempered film according to the present invention.

[0031] Figure 8 This is a schematic cross-sectional view of the sleeve section of a segmented uniform hot bending forming device and forming method for curved 3D tempered film according to the present invention.

[0032] In the diagram: 1. Base plate; 2. First protective box; 3. Second protective box; 4. Guide rail; 5. Electric actuator; 6. Heat insulation gate; 7. Sealing box; 8. Mounting slot; 9. Lifting slot; 10. Exhaust plate; 11. Heat insulation pad; 12. Carriage; 13. Temperature monitor; 14. Air blower box; 15. Support frame; 16. Upper mold plate; 17. Lower mold base; 18. Permanent magnet drive block; 19. Slide rail; 20. Threaded seat; 21. Coil disc; 22. Threaded rod; 23. Storage 24. Air tank; 25. Air pump; 26. Air supply pipe; 27. Hydraulic rod; 28. Connecting plate; 29. ​​Expansion joint; 30. Locking rod; 31. Positioning rod; 32. Sleeve; 33. Locking plate; 34. Discharge chute; 35. Top column; 36. Expansion groove; 37. Expansion rod; 38. Return spring; 39. Locking block; 40. First platform; 41. Second platform; 42. Slide rod; 43. Compression spring; 44. Corner module; 45. Side module; 46. Heat conduction hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] refer to Figures 1-8 The illustrated equipment for segmented uniform hot bending of curved 3D tempered glass film includes a substrate 1, on which a quick-release assembly and a hot bending assembly are disposed. A specific embodiment is shown below:

[0035] Example 1

[0036] A first protective box 2 and a second protective box 3 are fixedly connected to the upper surface of the substrate 1. The side walls of the first protective box 2 and the second protective box 3 are provided with lifting grooves 9. A heat insulation gate 6 is slidably connected in the lifting groove 9. An electric push rod 5 is fixedly connected to the upper end of the first protective box 2 and the second protective box 3. The output end of the electric push rod 5 extends into the lifting groove 9 and is fixedly connected to the heat insulation gate 6.

[0037] The first protective box 2 is a high-temperature hot-bending sealed furnace body, and the second protective box 3 is a gradient cooling sealed cavity. The first protective box 2 and the second protective box 3 are arranged side by side, and their internal cavities are independent of each other to prevent heat cross-flow. The heat insulation gate 6 is made of aluminum silicate fiber composite steel plate structure. The side is inserted into the lifting groove 9 to achieve vertical sealing sliding assembly. When the electric push rod 5 extends, it pushes the heat insulation gate 6 down along the lifting groove 9 to close the cavity. When the electric push rod 5 retracts, it lifts the heat insulation gate 6 to rise, realizing the full opening of the cavity inlet and outlet.

[0038] The inner wall of the first protective box 2 is fixedly connected to an exhaust plate 10 and a temperature monitor 13. The inner wall of the second protective box 3 is fixedly connected to a blower box 14. The upper surface of the base plate 1 is fixedly connected to an air tank 23 and an air pump 24. The output end of the air pump 24 is fixedly connected to an air supply pipe 25. The air pump 24 and the exhaust plate 10 are connected through the air supply pipe 25.

[0039] The end of the gas supply pipe 25 passes through the sealing joint on the side wall of the first protective box 2 and connects to the exhaust plate 10. After the first protective box 2 is closed, the air pump 24 starts and sprays high-pressure nitrogen gas evenly into the first protective box 2 through the exhaust plate 10 to form an oxygen-free nitrogen protective atmosphere to prevent the tempered film from oxidizing and turning white at high temperatures. The air blowing box 14 has multiple sets of variable frequency centrifugal fans and a split air duct. The air duct outlet is arranged directly opposite the heat conduction holes 45 of the lower mold base 17. The airflow discharged from the air duct provides the air source for the zoned gradient air cooling of the lower mold base 17.

[0040] Example 2

[0041] A mounting groove 8 is provided on the substrate 1. A sealing box 7 is fixedly connected in the mounting groove 8. A slide rail 19 is fixedly connected in the sealing box 7. A threaded seat 20 is slidably connected in the slide rail 19. A coil disc 21 is fixedly connected to the end of the threaded seat 20 away from the slide rail 19. A threaded rod 22 is rotatably connected in the slide rail 19. The threaded rod 22 is threadedly connected to the threaded seat 20. Two guide rails 4 are fixedly connected to the upper surface of the substrate 1. The two guide rails 4 are symmetrically distributed on both sides of the mounting groove 8. A slide frame 12 is slidably connected to the outer wall of the guide rail 4. A heat insulation pad 11 is fixedly connected to the upper end of the two slide frames 12. The heat insulation pad 11 is fixedly connected to the lower mold base 17. A permanent magnet drive block 18 is fixedly connected to the end of the heat insulation pad 11 near the sealing box 7.

[0042] The sealing box 7 is made of alumina ceramic material, which is resistant to high temperature, has good insulation and is non-magnetic. It will not block the magnetic transmission of the coil disk 21, and can also isolate the high temperature inside the first protective box 2. One end of the threaded rod 22 is connected to a servo drive motor, and the coil disk 21 is connected to a frequency conversion excitation power supply.

[0043] The heat insulation pad 11 isolates the high temperature of the lower mold base 17 from being conducted to the slide 12 and the guide rail 4. The heat insulation pad 11 protrudes from the side end face of the sealing box 7 to fix the permanent magnet drive block 18. The permanent magnet drive block 18 is made of samarium cobalt alloy, which is suitable for the high temperature environment inside the first protective box 2. It ensures a stable magnetic connection with the coil disk 21 inside the sealing box 7. The alternating magnetic field generated by the switching on and off of the coil disk 21 forms a magnetic attraction force with the permanent magnet drive block 18, which drives the lower mold base 17 to move smoothly along the guide rail 4. This drive method has no wear of mechanical transmission parts, runs smoothly and is suitable for high temperature environments.

[0044] Example 3

[0045] The hot bending assembly includes an upper template 16 and a lower mold base 17. Corner modules 43 are slidably connected to the upper template 16 near its four corners. A side module 44 is installed between every two corner modules 43. Both the corner modules 43 and the side modules 44 are slidably connected below the upper template 16. Multiple heat conduction holes 45 are evenly opened on the side of the lower mold base 17. Expansion joints 28 are installed near the four corners of the upper template 16. Locking rods 29 are fixedly connected to the output end of the expansion joints 28. Locking plates 32 are installed near the four corners of the lower mold base 17. Locking rods 29 are inserted into locking plates 32. Positioning rods 30 are installed near the four corners of the upper template 16. A material discharge groove 33 is opened inside the lower mold base 17. A support frame 15 is fixedly connected to the inner wall of the first protective box 2. A hydraulic rod 26 is fixedly connected to the support frame 15. A connecting plate 27 is fixedly connected to the output end of the hydraulic rod 26. The connecting plate 27 is fixedly connected to the sleeve 31.

[0046] The interior of the sealed first protective box 2 is heated to 520-550℃. The temperature inside the furnace is monitored in real time by the temperature monitor 13 and closed-loop temperature control is achieved. At this temperature, the tempered glass only reaches the pre-softening critical state and has not entered the fully softened flow state. The glass blank is laid flat in the feeding groove 33 opened in the lower mold base 17 and suspended to cover the curved cavity. The feeding groove 33 provides stable support for the blank, which can prevent the glass from falling into the lower mold under the action of gravity, prevent the blank from shifting and deforming, and at the same time eliminate the initial temperature gradient inside the blank to avoid the subsequent local sudden heating that causes thermal cracks.

[0047] The upper template 16 is a frame-type template. Independent corner modules 43 are vertically slidably assembled at the four corners of the template. Side modules 44 are horizontally slidably assembled between two adjacent corner modules 43. The corner modules 43 and side modules 44 can be independently raised and lowered vertically. Each corner module 43, side module 44, and the central main body area of ​​the upper template 16 are embedded with an infrared halogen heating tube + ceramic heating plate composite heating module. Each heating module is independently wired to the zone temperature control module.

[0048] The temperature of the central plane area of ​​the upper template 16 is controlled at 540-560℃, the side module 44 at 560-580℃, and the corner module 43 at 580-600℃. Then, under the push of the hydraulic rod 26, the upper template 16, its corner module 43, and the side module 44 move downward together. The central plane area of ​​the upper template 16 first presses down on the heated tempered film material, then controls the power device of the side module 44 to push the side module 44 to press down on the material, and finally the corner module 43 completes the pressing operation. After the upper template 16 and the lower mold base 17 complete the mold closing, the temperature monitoring component of the telescopic device 28 is activated after the mold closing, automatically monitoring the temperature between the upper template 16 and the lower mold base 17. When the monitored temperature is too high, the telescopic device 28 is controlled to push the locking rod 29 to automatically insert into the locking plate 32, automatically locking the upper template 16 and the lower mold base 17 tightly.

[0049] Example 4

[0050] The quick-release assembly includes a sleeve 31 and a top post 34. Two telescopic grooves 35 are symmetrically opened on the inner wall of the sleeve 31. A telescopic rod 36 is slidably connected in the telescopic groove 35. The inner end of the telescopic rod 36 extends from the outside of the sleeve 31 through the sleeve wall and into the telescopic groove 35. A sliding rod 41 is fixedly connected to the end of the top post 34 near the sleeve 31. A first platform 39 is fixedly connected to the end of the sliding rod 41 away from the top post 34. A locking block 38 is fixedly connected to the end of each telescopic rod 36 near the first platform 39, and the locking block 38 engages with the first platform 39. The top post 34 is fixedly connected to the upper template 16. A second platform 40 is slidably connected to the outer wall of the sliding rod 41. A return spring 37 is sleeved on the outer wall of the telescopic rod 36, and a compression spring 42 is sleeved on the outer wall of the top post 34.

[0051] During the mold closing process, the hydraulic rod 26 pushes the connecting plate 27 downward, which in turn drives the sleeve 31 to move. The locking block 38 pushes the second platform 40 to slide along the outer wall of the slide rod 41 until the second platform 40 abuts against the top column 34. Under the pressure of the second platform 40, the locking block 38 retracts along the telescopic groove 35. When the locking block 38 passes the second platform 40, the locking block 38 slides along the conical end face of the second platform 40. The return spring 37 pushes the locking block 38 and the telescopic rod 36 to extend. The locking block 38 abuts against the second platform 40. The two locking blocks 38 clamp the second platform 40. After the mold closing is completed, the hydraulic rod 26 retracts and drives the connecting plate 27 upward. The locking block 38 pulls the second platform 40 to slide along the slide rod 41. When the locking block 38 passes the abutting end of the first platform 39 and the second platform 40, the disassembly of the upper template 16 can be completed.

[0052] The driving threaded rod 22 rotates, driving the threaded seat 20 to slide along the slide rail 19, which in turn drives the upper mold plate 16 and the lower mold base 17 to move together into the second protection box 3, and activates the air blowing box 14 in the second protection box 3 to blow out airflow; the plurality of heat conduction holes 45 opened on the side of the lower mold base 17 respectively correspond to the corner module 43, the side module 44 and the central flat area, the airflow blown out by the air blowing box 14 enters the heat conduction holes 45 at the corresponding positions respectively, and the control system supporting the heat conduction holes 45 controls each corresponding area to perform gradient cooling at different speeds to release the internal stress of the tempered film. After the cooling is completed, the temperature monitoring component matched with the telescopic device 28 controls the telescopic device 28 to retract according to the monitoring result, automatically pulls the locking connecting rod 29 out of the locking plate 32, releases the locking of the upper mold plate 16 and the lower mold base 17, and then the formed curved 3D tempered film can be taken out.

[0053] A method for using a segmented uniform hot-bending forming equipment for curved 3D tempered films, comprising the following steps:

[0054] S1. Start the equipment, drive the heat insulation gate plate 6 on the first protection box 2 to rise and open through the electric push rod 5, and the coil disc 21 is energized to form a magnetic connection with the permanent magnet driving block 18; the driving threaded rod 22 rotates, driving the threaded seat 20 to slide along the slide rail 19, which in turn drives the lower mold base 17 to move, so that the lower mold base 17 moves out of the outer wall of the first protection box 2; place the tempered film raw material to be processed into the discharging groove 33 of the lower mold base 17 to complete the positioning and placement of the raw material;

[0055] S2. After the placement is completed, drive the lower mold base 17 to move back to the inside of the first protection box 2, operate the electric push rod 5 to drive the heat insulation gate plate 6 to descend and close, monitor the temperature inside the furnace in real time through the temperature monitor 13, and simultaneously introduce nitrogen into the first protection box 2 to form a basic protective atmosphere; the side module 44 and the corner module 43 installed on the upper mold plate 16 can realize zoned differentiated temperature control, then the central flat area of the upper mold plate 16 first presses down the heated tempered film raw material, then the side module 44 presses down the raw material, and finally the corner module 43 completes the pressing operation; after the pressing is completed, the output end of the telescopic device 28 pushes the locking connecting rod 29 to automatically insert into the locking plate 32 of the lower mold base 17, so as to realize the airtight locking of the upper mold plate 16 and the lower mold base 17;

[0056] S3. Move the airtightly locked upper mold plate 16 and lower mold base 17 synchronously into the second protection box 3 for cooling, activate the air blowing box 14 in the second protection box 3 to blow out airflow; the plurality of heat conduction holes 45 opened on the side of the lower mold base 17 respectively correspond to the corner module 43, the side module 44 and the central flat area, the airflow blown out by the air blowing box 14 enters the heat conduction holes 45 at the corresponding positions respectively, and the control system supporting the heat conduction holes 45 controls each corresponding area to perform gradient cooling at different speeds.

[0057] The working principle of this invention is as follows: The equipment is started, and the electric actuator 5 drives the heat insulation gate 6 on the first protective box 2 to rise and open. After the coil 21 is energized, it forms a magnetic connection with the permanent magnet drive block 18. The threaded rod 22 is rotated, causing the threaded seat 20 to slide along the slide rail 19, which in turn moves the lower mold base 17, causing it to move out of the outer wall of the first protective box 2. The tempered glass film material to be processed is placed into the material feeding groove 33 of the lower mold base 17. After placement, the lower mold base 17 is driven back into the first protective box 2. The electric actuator 5 drives the heat insulation gate 6 to descend and close, heating the sealed interior of the first protective box 2. The air pump 24 is started, spraying high-pressure nitrogen gas evenly into the first protective box 2 through the exhaust plate 10, forming an oxygen-free nitrogen protective atmosphere. Under the push of the hydraulic rod 26, the upper mold plate 1... The central plane area first presses down the heated tempered film material, then controls the power device of the side module 44 to push the side module 44 to press down the material, and finally the corner module 43 completes the pressing operation. When the monitored temperature is too high, the telescopic device 28 is controlled to push the locking rod 29 to automatically insert into the locking plate 32, automatically locking the upper template 16 and the lower mold base 17 tightly. During the mold closing process, the hydraulic rod 26 pushes the connecting plate 27 to move downward. When the locking block 38 passes the second platform 40, the two locking blocks 38 clamp the second platform 40. The hydraulic rod 26 retracts and drives the connecting plate 27 to move upward. The locking block 38 pulls the second platform 40 to slide along the slide rod 41. When the locking block 38 passes the first platform 39 and abuts the second platform 40, the disassembly of the upper template 16 can be completed.

[0058] The drive threaded rod 22 rotates, causing the threaded seat 20 to slide along the slide rail 19, which in turn causes the upper template 16 and the lower template 17 to move together into the second protective box 3. The blower box 14 in the second protective box 3 is activated to blow out airflow. The airflow blown out by the blower box 14 enters the heat conduction hole 45 at the corresponding position, controlling the corresponding area to perform gradient cooling at different speeds, releasing the internal stress of the tempered film.

[0059] After cooling is complete, the telescopic device 28 retracts, automatically pulling the locking link 29 out of the locking plate 32, releasing the locking of the upper template 16 and the lower mold base 17, and the formed curved 3D tempered glass film can be taken out.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A segmented uniform hot bending forming equipment for curved 3D tempered glass film, comprising a substrate (1), characterized in that: The substrate (1) is provided with a quick-release assembly and a hot bending assembly; The hot bending assembly includes an upper template (16) and a lower mold base (17). The upper template (16) is slidably connected to corner modules (43) near the four corners. A side module (44) is installed between every two corner modules (43). The corner modules (43) and the side modules (44) are slidably connected below the upper template (16). The side of the lower mold base (17) is evenly provided with multiple heat conduction holes (45). The upper template (16) is installed with telescopic devices (28) near the four corners. The output end of the telescopic device (28) is fixedly connected with a locking rod (29). The lower mold base (17) is installed with locking plates (32) near the four corners. The locking rod (29) is inserted into the locking plate (32). The quick-release assembly includes a sleeve (31) and a top post (34). The inner wall of the sleeve (31) has two symmetrically opened telescopic grooves (35). A telescopic rod (36) is slidably connected in the telescopic groove (35). The inner end of the telescopic rod (36) extends from the outside of the sleeve (31) through the sleeve wall into the telescopic groove (35). A sliding rod (41) is fixedly connected to one end of the top post (34) near the sleeve (31). A first platform (39) is fixedly connected to one end of the sliding rod (41) away from the top post (34). A locking block (38) is fixedly connected to one end of each telescopic rod (36) near the first platform (39), and the locking block (38) is engaged with the first platform (39).

2. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 1, characterized in that: The upper surface of the substrate (1) is fixedly connected to a first protective box (2) and a second protective box (3). The side walls of the first protective box (2) and the second protective box (3) are provided with lifting grooves (9). A heat insulation gate (6) is slidably connected in the lifting groove (9). A positioning rod (30) is installed near the four corners of the upper template (16). A material discharge groove (33) is provided in the lower mold base (17).

3. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 2, characterized in that: The upper ends of the first protective box (2) and the second protective box (3) are fixedly connected with electric push rods (5). The output end of the electric push rods (5) extends into the lifting groove (9) and is fixedly connected to the heat insulation gate (6).

4. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 1, characterized in that: The substrate (1) has an installation groove (8), a sealing box (7) is fixedly connected in the installation groove (8), a slide rail (19) is fixedly connected in the sealing box (7), a threaded seat (20) is slidably connected in the slide rail (19), and a coil disc (21) is fixedly connected to one end of the threaded seat (20) away from the slide rail (19).

5. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 4, characterized in that: A threaded rod (22) is rotatably connected inside the slide rail (19). The threaded rod (22) is threadedly connected to the threaded seat (20). Two guide rails (4) are fixedly connected to the upper surface of the base plate (1). The two guide rails (4) are symmetrically distributed on both sides of the mounting groove (8).

6. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 5, characterized in that: The outer wall of the guide rail (4) is slidably connected to a slide (12), and the upper ends of the two slides (12) are fixedly connected to a heat insulation pad (11). The heat insulation pad (11) is fixedly connected to the lower mold base (17), and a permanent magnet drive block (18) is fixedly connected to one end of the heat insulation pad (11) near the sealing box (7).

7. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 2, characterized in that: The inner wall of the first protective box (2) is fixedly connected to an exhaust plate (10) and a temperature monitor (13). The inner wall of the second protective box (3) is fixedly connected to a blower box (14). The upper surface of the base plate (1) is fixedly connected to an air tank (23) and an air pump (24). The output end of the air pump (24) is fixedly connected to an air supply pipe (25). The air pump (24) and the exhaust plate (10) are connected through the air supply pipe (25).

8. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 7, characterized in that: The inner wall of the first protective box (2) is fixedly connected to a support frame (15), and a hydraulic rod (26) is fixedly connected to the support frame (15). The output end of the hydraulic rod (26) is fixedly connected to a connecting plate (27), and the connecting plate (27) is fixedly connected to the sleeve (31).

9. The segmented uniform hot bending forming equipment for curved 3D tempered film according to claim 1, characterized in that: The top column (34) is fixedly connected to the upper template (16), the outer wall of the slide rod (41) is slidably connected to the second body (40), the outer wall of the telescopic rod (36) is fitted with a reset spring (37), and the outer wall of the top column (34) is fitted with a compression spring (42).

10. A method of using a segmented uniform hot bending forming equipment for curved 3D tempered glass film, characterized in that, Includes the following steps: S1. Start the equipment. Drive the heat insulation gate (6) on the first protective box (2) to rise and open through the electric push rod (5). After the coil (21) is energized, it forms a magnetic connection with the permanent magnet drive block (18). Drive the threaded rod (22) to rotate, drive the threaded seat (20) to slide along the slide rail (19), and then drive the lower mold seat (17) to move, so that the lower mold seat (17) moves out of the outer wall of the first protective box (2). Place the tempered film raw material to be processed into the material feeding groove (33) of the lower mold seat (17) to complete the positioning and placement of the raw material. S2. After placement, drive the lower mold base (17) to move back into the first protective box (2), operate the electric push rod (5) to drive the heat insulation gate (6) to descend and close, monitor the furnace temperature in real time through the temperature monitor (13), and at the same time, introduce nitrogen into the first protective box (2) to form a basic protective atmosphere; the side module (44) and corner module (43) installed on the upper template (16) can realize zoned differential temperature control. Then, the central plane area of ​​the upper template (16) first presses down the heated tempered film material, then the side module (44) presses down the material, and finally the corner module (43) completes the pressing operation; after pressing down, the output end of the telescopic device (28) pushes the locking rod (29) to automatically insert into the locking plate (32) of the lower mold base (17) to realize the airtight locking of the upper template (16) and the lower mold base (17); S3. The sealed and locked upper template (16) and lower mold base (17) are moved synchronously into the second protective box (3) for cooling. The air blower box (14) in the second protective box (3) is activated to blow out airflow. The multiple heat conduction holes (45) opened on the side of the lower mold base (17) correspond to the corner module (43), the side module (44) and the central plane area respectively. The airflow blown out by the air blower box (14) enters the corresponding heat conduction holes (45). Through the control system matched with the heat conduction holes (45), the corresponding areas are controlled to perform gradient cooling at different speeds.

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