Hot pressing device and hot pressing method

Abstract

The invention belongs to the field of glass hot-pressing technical equipment, and particularly relates to a hot-pressing device and a hot-pressing method. The hot pressing device comprises a first cavity and a second cavity, the second cavity and the first cavity are fixedly arranged in a spaced mode in the preset direction, the first cavity is provided with a first opening communicating with the first containing cavity, and the second cavity is provided with a second opening communicating with the second containing cavity. The hot pressing device further comprises a first pressing plate and a second pressing plate which are arranged in a sliding mode in the preset direction, the first pressing plate and the second pressing plate are located in the first containing cavity and the second containing cavity respectively and correspond to the first opening and the second opening respectively, and the first containing cavity and the second containing cavity are filled with flexible media with preset pressure intensity. And the first pressing plate and the second pressing plate are driven to move oppositely. According to the invention, the first pressing plate and the second pressing plate can be uniformly stressed, and the thermal pressure applied to the upper die and the lower die can be steplessly adjusted, so that the accurate adjustment of the thermal pressure is finally realized.

Description

Technical Field

[0001] The invention belongs to the field of glass hot pressing technology and equipment, and in particular relates to a hot pressing device and a hot pressing method. Background Art

[0002] Glass precision hot pressing technology is an important process in the field of modern manufacturing, and is widely used in many fields such as construction, automobiles, electronics and solar energy. With the development of science and technology, the performance and appearance requirements of glass products are gradually increasing, and traditional glass forming methods can no longer fully meet the requirements of precision, quality and production efficiency. Precision hot pressing equipment plays a vital role in this context. It can realize the manufacture of glass products with complex shapes and high-precision patterns by precisely controlling temperature, pressure and deformation.

[0003] However, the existing hot pressing equipment still has certain technical bottlenecks in terms of pressure providing methods, process accuracy and equipment life. At present, most hot pressing equipment relies on mechanical pressure transmission systems, such as mechanical transmission to provide hot pressure. Mechanical transmission generally uses a screw mechanism. Although this method can achieve basic molding requirements, the screw is connected to the center of the lower mold during the hot pressing process, which will lead to uneven pressure distribution and easily cause local stress concentration of glass products, resulting in low yields. It is also difficult to accurately control the molding quality when producing complex geometric shapes. In addition, the pressure of traditional precision hot pressing equipment is driven by a motor. Due to the thread gap of the screw, transmission errors are inevitable. Especially in reverse transmission, the motor regulation cannot achieve precise and accurate pressure regulation. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a hot pressing device, aiming to solve the problem of how to evenly distribute the pressure on the mold and accurately adjust the pressure applied to the mold.

[0005] To achieve the above purpose, the technical solution adopted in this application is: In a first aspect, a hot pressing device is provided, which includes: a first cavity having a first accommodating cavity and a second cavity having a second accommodating cavity, the second cavity and the first cavity are spaced and fixedly arranged along a predetermined direction, the first cavity is provided with a first opening connected to the first accommodating cavity, and the second cavity is provided with a second opening connected to the second accommodating cavity, the hot pressing device also includes a first pressure plate and a second pressure plate both slidably arranged along the predetermined direction, the first pressure plate and the second pressure plate are respectively located in the first accommodating cavity and the second accommodating cavity, and are respectively arranged corresponding to the first opening and the second opening, the first accommodating cavity and the second accommodating cavity are filled with a flexible medium with a predetermined pressure to drive the first pressure plate and the second pressure plate to move toward each other.

[0006] In some embodiments, a plate edge of the first pressing plate is sealed and slidably connected to an inner wall of the first accommodating cavity, and / or a plate edge of the second pressing plate is sealed and slidably connected to an inner wall of the second accommodating cavity.

[0007] In some embodiments, the hot pressing device further includes a third pressing plate located in the first accommodating cavity, the third pressing plate is slidably arranged along the predetermined direction, and the first pressing plate is located between the second pressing plate and the third pressing plate.

[0008] In some embodiments, the hot pressing device further includes a first electromagnet, and two first electromagnets arranged opposite to each other are disposed in the first accommodating chamber, wherein one of the first electromagnets is connected to the first pressing plate, and the other first electromagnet is connected to the inner wall of the first accommodating chamber.

[0009] In some embodiments, two side surfaces of the third pressure plate are respectively provided with two first electromagnets.

[0010] In some embodiments, the hot pressing device further includes a second electromagnet, and two second electromagnets arranged opposite to each other are disposed in the second accommodating chamber, wherein one of the second electromagnets is connected to the second pressure plate, and the other second electromagnet is connected to the inner wall of the second accommodating chamber.

[0011] In some embodiments, the hot pressing device further includes an ultrasonic resonator, which is connected to the first pressing plate or the second pressing plate and is located between the first pressing plate and the second pressing plate.

[0012] In some embodiments, the hot pressing device further includes a counterweight block located in the first accommodating cavity, and the counterweight block is connected to the first pressing plate.

[0013] In some embodiments, the hot pressing device further includes a guide assembly, which includes a guide column fixedly arranged along the predetermined direction and a guide sleeve slidably connected to the guide column, and the guide sleeve is connected to both the first pressing plate and the second pressing plate.

[0014] In a second aspect, a hot pressing method is provided, which is implemented using the hot pressing device, and the hot pressing method comprises the following steps: preparing a hot pressing mold, wherein the hot pressing mold comprises an upper mold connected to the first pressing plate and a lower mold connected to the second pressing plate; placing a glass element on the upper surface of a lower mold, and heating the lower mold and the glass element; Filling the first accommodating chamber with the flexible medium of the predetermined pressure; Filling the second accommodating cavity with the flexible medium of the predetermined pressure to drive the upper mold and the lower mold to close the mold and hot-press the glass element; The lower mold and the glass element are cooled.

[0015] The beneficial effect of the present application lies in that: by arranging the first cavity and the second cavity relatively to each other in the vertical direction, and the first cavity and the second cavity are both fixedly arranged, the upper mold can be connected to the first pressure plate through the first opening, and the lower mold can be connected to the second pressure plate through the second opening, and a flexible medium with a certain pressure is filled into the first accommodating cavity and the second accommodating cavity, so that the first pressure plate and the second pressure plate move toward each other, and since the pressure in the first accommodating cavity or the second accommodating cavity is the same everywhere, the flexible medium can make the first pressure plate and the second pressure plate bear force evenly, and then the thermal pressure transmitted to the upper mold and the lower mold by the first pressure plate and the second pressure plate respectively is also evenly distributed, and through air pressure or hydraulic transmission, there is no transmission gap, and by changing the air pressure or hydraulic pressure, the thermal pressure applied to the upper mold and the lower mold can be steplessly adjusted, and finally the precise adjustment of the thermal pressure is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the hot pressing device provided in an embodiment of the present application; Figure 2 yes Figure 1 A cross-sectional schematic diagram of a hot pressing device; Figure 3 yes Figure 1 Schematic diagram of explosion of hot pressing device; Figure 4 This is a flow chart of a hot pressing method provided in another embodiment of the present application.

[0018] Among them, the reference numerals in the figure are: 100, hot pressing device; 11, first cavity; 12, second cavity; 101, first connecting hole; 102, second connecting hole; 20, guide assembly; 21, guide column; 22, guide sleeve; 14, control structure; 30, hot pressing mold; 111, first accommodating cavity; 112, second accommodating cavity; 131, first pressing plate; 132, second pressing plate; 133, third pressing plate; 41, first electromagnet; 42, second electromagnet; 311, upper mold; 312, water-cooled insulation block; 313, pressure sensor; 314, connecting block; 315, ultrasonic resonator; 321, vacuum cover; 322, heating module; 323, insulation sheet; DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present application.

[0020] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] See also Figures 1 to 3 The embodiment of the present application provides a hot pressing device 100, which can drive a hot pressing mold 30 to perform hot pressing molding on a glass element, and the glass element can be optical glass and is in a plate shape. The hot pressing mold 30 includes an upper mold 311 and a lower mold matched with the upper mold 311. The optical glass can be placed in the lower mold, and the optical glass is heated at the same time, and then the upper mold 311 and the lower mold are driven to close the mold, thereby realizing hot pressing molding of the optical glass.

[0022] See also Figures 1 to 3 The hot pressing device 100 includes: a first cavity 11 having a first accommodating cavity 111 and a second cavity 12 having a second accommodating cavity 112. The second cavity 12 and the first cavity 11 are spaced and fixedly arranged along a predetermined direction. In this embodiment, the predetermined direction is along the vertical direction, and the first cavity 11 is located above the second cavity 12.

[0023] The first cavity 11 is provided with a first opening connected to the first accommodating cavity 111, and the first opening is arranged downwardly. The second cavity 12 is provided with a second opening connected to the second accommodating cavity 112, and the second opening is arranged upwardly. The hot pressing device 100 also includes a first pressing plate 131 and a second pressing plate 132 both slidably arranged along a predetermined direction, and the predetermined direction is a vertical direction. The first pressing plate 131 and the second pressing plate 132 are respectively located in the first accommodating cavity 111 and the second accommodating cavity 112, and are arranged corresponding to the first opening and the second opening, respectively.

[0024] See also Figures 1 to 3 It can be understood that the lower surface of the first pressing plate 131 is connected to the upper mold 311, and the upper surface of the second pressing plate 132 is connected to the lower mold. Through the movement of the first pressing plate 131 and the second pressing plate 132, the upper mold 311 and the lower mold can be driven to move synchronously.

[0025] See also Figures 1 to 3 The first accommodating chamber 111 and the second accommodating chamber 112 are filled with a flexible medium of a predetermined pressure to drive the first pressing plate 131 and the second pressing plate 132 to move toward each other in the vertical direction, thereby driving the upper mold 311 and the lower mold to close the mold. The flexible medium can be a gas or a liquid, the gas can be air, and the liquid can be water, oil, or a mixture of oil and water. The predetermined pressure can range from 5 to 10 atmospheres, such as 5, 6, 7.3, 8, 9, and 10 atmospheres, which is not limited here and can be selected according to actual conditions.

[0026] See also Figures 1 to 3 The hot pressing device 100 provided in this embodiment is configured such that the first cavity 11 and the second cavity 12 are arranged opposite to each other in the vertical direction, and the first cavity 11 and the second cavity 12 are fixedly arranged, the upper mold 311 can be connected to the first pressing plate 131 through the first opening, and the lower mold can be connected to the second pressing plate 132 through the second opening, and a flexible medium with a certain pressure is filled into the first accommodating cavity 111 and the second accommodating cavity 112, so that the first pressing plate 131 and the second pressing plate 132 move toward each other. Since the pressure in the first accommodating cavity 111 and the second accommodating cavity 112 is the same everywhere, the flexible medium can make the first pressing plate 131 and the second pressing plate 132 bear uniform force, and then the pressure transmitted by the first pressing plate 131 and the second pressing plate 132 to the upper mold 311 and the lower mold respectively is also uniformly distributed, and there is no transmission gap through air pressure or hydraulic transmission, and the thermal pressure applied to the upper mold 311 and the lower mold can be steplessly adjusted by changing the air pressure or hydraulic pressure, and finally the precise adjustment of the thermal pressure is achieved.

[0027] Optionally, the first cavity 11 is provided with a first communicating hole 101 to allow the flexible medium to enter or flow out of the first accommodating cavity 111 ; the second cavity 12 is provided with a second communicating hole 102 to allow the flexible medium to enter or flow out of the second accommodating cavity 112 .

[0028] Optionally, the upper mold 311 and the lower mold can be driven by air pressure or hydraulic pressure to improve the production efficiency and product quality of precision hot pressing of optical glass. The hot pressing device 100 provided in this embodiment is an innovative hot pressing device that can provide uniform and controllable pressure, while reducing processing stress and increasing equipment life.

[0029] It is understandable that when the flexible medium is a liquid, the pressure applied to the first pressing plate 131 must be added to the gravity of the liquid in the first accommodating chamber 111, thereby increasing the thermal pressure applied to the upper mold 311, so that the maximum thermal pressure is generated on a limited structure, which is also conducive to the compactness of the overall structure of the hot pressing device 100. In addition, the liquid in the first accommodating chamber 111 and the second accommodating chamber 112 also has a heat insulation effect, which can hinder the heat conduction of the upper mold 311 and the lower mold respectively, and prevent the heat from affecting other electronic components.

[0030] See also Figures 1 to 3 In some embodiments, the edge of the first pressing plate 131 is sealed and slidably connected to the inner wall of the first accommodating cavity 111 .

[0031] In some embodiments, the plate edge of the second pressing plate 132 is sealed and slidably connected to the inner wall of the second accommodating cavity 112 .

[0032] Optionally, sealing rings are provided on the side surfaces of the first pressing plate 131 and the second pressing plate 132 to achieve a sealed and sliding connection between the first pressing plate 131 and the inner wall of the first accommodating chamber 111 , and between the second pressing plate 132 and the inner wall of the second accommodating chamber 112 .

[0033] Optionally, the edge of the first pressing plate 131 is sealed and slidably connected to the inner wall of the first accommodating chamber 111 to prevent leakage of the flexible medium and ensure the stability and reliability of the working pressure. Similarly, the edge of the second pressing plate 132 is sealed and slidably connected to the inner wall of the second accommodating chamber 112 to prevent leakage of the flexible medium and ensure the stability and reliability of the working pressure.

[0034] See also Figures 1 to 3 In some embodiments, the hot pressing device 100 further includes a third pressing plate 133 located in the first accommodating cavity 111, the third pressing plate 133 is slidably arranged along a predetermined direction, and the first pressing plate 131 is located between the second pressing plate 132 and the third pressing plate 133. The predetermined direction is a vertical direction.

[0035] It can be understood that the third pressure plate 133 divides the first accommodating chamber 111 into two parts, thereby realizing graded adjustment of thermal pressure. For example, the third pressure plate 133 is fixed in the vertical direction, and a limit column can be detachably provided on the third pressure plate 133, and the two ends of the limit column respectively abut against the cavity top of the first accommodating chamber 111 and the third pressure plate 133, and a gas or liquid with a certain pressure is filled into the area of ​​the first accommodating chamber 111 between the first pressure plate 131 and the third pressure plate 133, or the limit column is removed to release the vertical restriction on the third pressure plate 133, and the third pressure plate 133 slides upward to the limit position, and a gas or liquid with a certain pressure can be filled into the entire first accommodating chamber 111, thereby realizing multiple adjustments of thermal pressure.

[0036] See also Figures 1 to 3 In some embodiments, the hot pressing device 100 further includes a first electromagnet 41, and two first electromagnets 41 are disposed opposite to each other in the first accommodation chamber 111, wherein one first electromagnet 41 is connected to the first pressing plate 131, and the other first electromagnet 41 is connected to the inner wall of the first accommodation chamber 111, such as the top of the chamber. It can be understood that the first electromagnet 41 includes a permanent magnet and a coil wound around the permanent magnet, which is a prior art and will not be described in detail here.

[0037] Optionally, the first electromagnet 41 is plate-shaped, and the two first electromagnets 41 may be magnetically repelled or magnetically attracted to each other. For example, when the upper mold 311 and the lower mold are closed, the two first electromagnets 41 are magnetically repelled, thereby increasing the downward force applied to the upper mold 311; after the hot pressing is completed, when the upper mold 311 and the lower mold are separated, the pressure in the first accommodating cavity 111 and the second accommodating cavity is reduced, the first pressing plate 131 and the second pressing plate 132 move in opposite directions, the first pressing plate 131 rises, and the second pressing plate 132 falls; the current direction of the two first electromagnets 41 is changed to make the two first electromagnets 41 magnetically attracted to each other, thereby increasing the rising speed and rising stability of the first pressing plate 131, and realizing rapid demoulding.

[0038] It can also be understood that by controlling and adjusting the magnitude of the current on the first electromagnet 41 , precise adjustment of the electromagnetic force can be achieved, thereby precisely adjusting the thermal pressure applied to the upper mold 311 .

[0039] Optionally, the material of the first pressing plate 131 is a magnetic material, such as metal iron. The first pressing plate 131 made of magnetic material can improve the uniformity of the magnetic field distribution of the first electromagnet 41 connected to the first pressing plate 131, and ultimately increase the magnetic field force on the first pressing plate 131 and make the force uniform, thereby making the force uniform on the upper mold 311 and the lower mold, and improving the hot pressing accuracy.

[0040] See also Figures 1 to 3 In some embodiments, two first electromagnets 41 are respectively disposed on both side surfaces of the third pressing plate 133 .

[0041] Optionally, the four first electromagnets 41 located in the first accommodating cavity 111 may magnetically attract each other or magnetically repel each other in sequence, thereby adjusting the thermal pressure applied to the upper mold 311 .

[0042] In some embodiments, the hot pressing device 100 also includes a second electromagnet 42. Two second electromagnets 42 are arranged opposite to each other in the second accommodating chamber 112. One second electromagnet 42 is connected to the second pressing plate 132, and the other second electromagnet 42 is connected to the inner wall of the second accommodating chamber 112, such as the bottom of the chamber.

[0043] See also Figures 1 to 3Optionally, the second electromagnet 42 is plate-shaped, and the two second electromagnets 42 may be magnetically repelled or magnetically attracted to each other. For example, when the upper mold 311 and the lower mold are closed, the two second electromagnets 42 are magnetically repelled, thereby increasing the upward force applied to the lower mold; after the hot pressing is completed, when the upper mold 311 and the lower mold are separated, the pressure in the first accommodating cavity 111 and the second accommodating cavity is reduced, the first pressing plate 131 and the second pressing plate 132 move in opposite directions, the first pressing plate 131 rises, and the second pressing plate 132 falls; the current direction of the two second electromagnets 42 is changed to make the two second electromagnets 42 magnetically attracted to each other, thereby increasing the descending speed and descending stability of the second pressing plate 132, and realizing rapid demolding.

[0044] It can also be understood that by controlling and adjusting the magnitude of the current on the second electromagnet 42, precise adjustment of the electromagnetic force can be achieved, thereby precisely adjusting the thermal pressure applied to the lower mold.

[0045] Optionally, the second pressing plate 132 is made of a magnetic material, such as metal iron. The second pressing plate 132 made of a magnetic material can improve the uniformity of the magnetic field distribution of the second electromagnet 42 connected to the second pressing plate 132, thereby ultimately increasing the magnetic field force on the second pressing plate 132 and making the force uniform, thereby making the force on the upper mold 311 and the lower mold uniform and improving the hot pressing accuracy.

[0046] See also Figures 1 to 3 In some embodiments, the hot pressing device 100 further includes an ultrasonic resonator 315 , which is connected to the first pressing plate 131 or the second pressing plate 132 and is located between the first pressing plate 131 and the second pressing plate 132 .

[0047] See also Figures 1 to 3 Optionally, ultrasonic resonators 315 are provided on the first pressing plate 131 and the second pressing plate 132, and the upper mold 311 and the lower mold are respectively connected to the two ultrasonic resonators 315. The ultrasonic resonators 315 can generate ultrasonic waves to the hot pressing mold 30. The ultrasonic method can be longitudinal waves or transverse waves. The introduction of ultrasonic resonators 315 assists the hot pressing process through high-frequency vibration, improves the fluidity of the optical glass material and improves the processing efficiency. Ultrasonic vibration also helps to reduce microscopic defects on the surface of the material during processing, making the surface of the optical glass after hot pressing smoother.

[0048] See also Figures 1 to 3It can be understood that, through the combination of gas / hydraulic pressure, magnetic field force and gravity of the mechanical part of the hot pressing mold 30, and through the neuron control strategy, the precise application and stepless regulation of thermal pressure can be achieved. The disadvantage of the distribution of thermal pressure presenting a two-dimensional Gaussian distribution at the center is avoided, the uniformity and stability of the thermal pressure are improved, and a stepless regulation force is provided. The ultrasonic resonator 315 can realize high-frequency vibration of the upper mold 311 and the lower mold, and transmit the vibration to the optical glass, thereby increasing the internal energy of the processed optical glass, thereby reducing the energy required for the optical glass during precision hot pressing, and improving the high surface energy behavior of the surface of the hot pressing mold 30.

[0049] The ultrasonic resonator 315 can also effectively control the fluidity inside the optical glass, avoiding material deformation and defects that are easy to occur when processing complex structures, thereby meeting high-precision and high-performance processing requirements.

[0050] It is understandable that the hot pressing device 100 provided in the embodiment of the present application avoids the use of traditional motor drive and ball screw transmission to transmit hot pressure, and forms a composite force through the repulsive force of the first electromagnet 41 and the second electromagnet 42 and the pressure of the gas (liquid) pressure, thereby achieving precise control of the force field and multiplication of the hot pressure of small equipment, which can be conducive to the compact structure of the hot pressing device 100. The ultrasonic resonator 315 is then used to control the type, vibration frequency and power energy of the ultrasonic wave applied to the upper mold 311 and the lower mold to control the acoustic field and the force field.

[0051] See also Figures 1 to 3 In some embodiments, the hot pressing device 100 further includes a counterweight block located in the first accommodating cavity 111 , and the counterweight block is connected to the first pressing plate 131 .

[0052] Optionally, the material of the configuration block can be a metal material with a relatively high density, such as metal iron. The setting of the counterweight block can balance the movement of the first pressing plate 131 during the hot pressing process, prevent the problem of unstable movement caused by the pressure fluctuation of the flexible medium, and provide additional hot pressure. Through the balancing effect of the counterweight block, the upper mold 311 and the lower mold are ensured to be closed during the entire hot pressing process, thereby improving the quality of hot pressing.

[0053] See also Figures 1 to 3 In some embodiments, the hot pressing device 100 further includes a guide assembly 20, which includes a guide column 21 fixedly arranged along a predetermined direction and a guide sleeve 22 slidably connected to the guide column 21, and the first pressing plate 131 and the second pressing plate 132 are both connected to the guide sleeve 22. The two ends of the guide column 21 extend into the first accommodating cavity 111 and the second accommodating cavity 112 respectively, and are connected to the first cavity 11 and the second cavity 12 respectively. The third pressing plate 133 is also provided with a guide sleeve 22 Optionally, four guide assemblies 20 are provided, the first pressing plate 131 and the second pressing plate 132 are square plates, and the four guide assemblies 20 are respectively located at four right angles of the first pressing plate 131 and the second pressing plate 132. The cooperation between the guide column 21 and the guide sleeve 22 ensures the precise sliding of the first pressing plate 131, the second pressing plate 132 and the third pressing plate 133 in the vertical direction, avoids deviation or tilt, and improves the processing accuracy.

[0054] See also Figures 1 to 3 Optionally, the hot pressing mold 30 also includes a water-cooled insulation block 312, a pressure sensor 313, a heating module 322, an insulation sheet 323 and a vacuum cover 321. The upper mold 311, the water-cooled insulation block 312, the pressure sensor 313, the connecting block 314, the ultrasonic resonator 315 and the first pressing plate 131 are connected in sequence from bottom to top, and the upper mold 311 is partially located in the vacuum cover 321 and is sealed and slidably connected to the vacuum cover 321. The lower mold (not shown), the heating module 322, the insulation sheet 323, the pressure sensor 313, the connecting block 314 and the ultrasonic resonator 315 are connected in sequence from top to bottom, and the lower mold is located in the vacuum cover 321.

[0055] The vacuum cover 321 may be made of optical glass, the heat insulating sheet 323 may be made of mica, and the upper mold 311 may be made of hard alloy.

[0056] See also Figures 1 to 3 Optionally, the hot pressing device 100 also includes a control structure 14, which is connected to the second cavity 12 and is used to control the first electromagnet 41, the second electromagnet 42, the ultrasonic resonator 315, the pneumatic pump and the hydraulic pump, the pneumatic pump is used to pump gas into the first accommodating cavity 111 and the second accommodating cavity 112, and the hydraulic pump is used to pump liquid into the first accommodating cavity 111 and the second accommodating cavity 112.

[0057] See also Figure 4 The present invention further proposes a hot pressing method, which is implemented using the above-mentioned hot pressing device 100. The specific structure of the hot pressing device 100 refers to the above-mentioned embodiment. Since the hot pressing method adopts all the technical solutions of all the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0058] The hot pressing method comprises the following steps: S1: preparing a hot pressing mold 30, the hot pressing mold 30 comprising an upper mold 311 connected to the first pressing plate 131 and a lower mold connected to the second pressing plate 132; S2: placing the optical glass on the upper surface of the lower mold, and heating the lower mold and the optical glass; the lower mold and the optical glass may be heated by the heating module 322 to raise the temperature of the optical glass to the glass transition temperature; S3: Filling the first accommodating chamber 111 with a flexible medium of a certain pressure; S4: Filling a flexible medium with a certain pressure into the second accommodating cavity 112 to drive the upper mold 311 and the lower mold to close the mold and hot-press the optical glass; S5: Cooling the lower mold and the optical glass.

[0059] It can be understood that the use of flexible media to drive the hot pressing mold to close the mold, combined with electromagnetic force and ultrasonic resonator, can accurately control the thermal pressure to ensure uniform deformation and precise molding of the optical glass during the hot pressing process.

[0060] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A hot pressing device, characterized in that: include: A first cavity having a first accommodating cavity and a second cavity having a second accommodating cavity, the second cavity and the first cavity are spaced and fixedly arranged along a predetermined direction, the first cavity is provided with a first opening connected to the first accommodating cavity, and the second cavity is provided with a second opening connected to the second accommodating cavity, the hot pressing device also includes a first pressing plate and a second pressing plate both slidably arranged along the predetermined direction, the first pressing plate and the second pressing plate are respectively located in the first accommodating cavity and the second accommodating cavity, and are respectively arranged corresponding to the first opening and the second opening, the first accommodating cavity and the second accommodating cavity are filled with a flexible medium with a predetermined pressure to drive the first pressing plate and the second pressing plate to move toward each other.

2. The hot pressing device according to claim 1, characterized in that: The plate edge of the first pressing plate is sealed and slidably connected to the inner wall of the first accommodating cavity, and / or the plate edge of the second pressing plate is sealed and slidably connected to the inner wall of the second accommodating cavity.

3. The hot pressing device according to claim 1, characterized in that: The hot pressing device further includes a third pressing plate located in the first accommodating cavity, the third pressing plate is slidably arranged along the predetermined direction, and the first pressing plate is located between the second pressing plate and the third pressing plate.

4. The hot pressing device according to claim 3, characterized in that: The hot pressing device further includes a first electromagnet. Two first electromagnets arranged opposite to each other are arranged in the first accommodating chamber, wherein one of the first electromagnets is connected to the first pressing plate, and the other first electromagnet is connected to the inner wall of the first accommodating chamber.

5. The hot pressing device according to claim 4, characterized in that: Two first electromagnets are respectively arranged on both side surfaces of the third pressing plate.

6. The hot pressing device according to any one of claims 1 to 5, characterized in that: The hot pressing device also includes a second electromagnet. Two second electromagnets arranged opposite to each other are arranged in the second accommodating chamber, one of the second electromagnets is connected to the second pressing plate, and the other second electromagnet is connected to the inner wall of the second accommodating chamber.

7. The hot pressing device according to any one of claims 1 to 5, characterized in that: The hot pressing device further includes an ultrasonic resonator, which is connected to the first pressing plate or the second pressing plate and is located between the first pressing plate and the second pressing plate.

8. The hot pressing device according to any one of claims 1 to 5, characterized in that: The hot pressing device further includes a counterweight block located in the first accommodating cavity, and the counterweight block is connected to the first pressing plate.

9. The hot pressing device according to any one of claims 1 to 5, characterized in that: The hot pressing device further includes a guide assembly, which includes a guide column fixedly arranged along the predetermined direction and a guide sleeve slidably connected to the guide column, and the first pressing plate and the second pressing plate are both connected to the guide sleeve.

10. A hot pressing method, which is implemented using the hot pressing device according to any one of claims 1 to 9, and the hot pressing method comprises the following steps: preparing a hot pressing mold, wherein the hot pressing mold comprises an upper mold connected to the first pressing plate and a lower mold connected to the second pressing plate; placing a glass element on the upper surface of a lower mold, and heating the lower mold and the glass element; Filling the first accommodating chamber with the flexible medium of the predetermined pressure; Filling the second accommodating cavity with the flexible medium of the predetermined pressure to drive the upper mold and the lower mold to close the mold and hot-press the glass element; The lower mold and the glass element are cooled.

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