A precision rolling apparatus

Abstract

The present application belongs to the field of glass hot-pressing technology equipment, and particularly relates to a precision roller pressing equipment. The precision roller pressing equipment comprises a roller pressing structure, a moving structure and a heating positioning structure. The roller pressing structure comprises a box body with a hot-pressing cavity, a roller cylinder rotatably arranged in the hot-pressing cavity, and a driver for driving the roller cylinder to rotate. The cavity bottom of the hot-pressing cavity is provided with a relief hole. The moving structure is located below the roller cylinder and comprises a horizontal moving assembly and a vertical moving assembly connected with the horizontal moving assembly. The heating positioning structure is located below the relief hole and comprises a heating assembly connected with the vertical moving assembly and having a heating surface, and a positioning plate arranged above the heating assembly and covering and abutting against the heating surface. The positioning plate is provided with a positioning hole corresponding to the position of the heating surface. The heating surface is partially exposed at the positioning hole. The positioning hole is shaped to be adapted to the workpiece. The workpiece is accommodated and positioned in the positioning hole and covers the heating surface at the positioning hole. The present application can improve the uniformity of the temperature field of the heating surface and improve the positioning precision of the glass plate.

Description

Technical Field

[0001] This invention belongs to the field of glass hot pressing technology equipment, and particularly relates to a precision rolling pressing device. Background Technology

[0002] Glass roller presses are a crucial piece of industrial equipment, playing a vital role in the manufacture of glass products. They are mechanical devices used in glass processing, primarily for pressing, processing, and improving the physical and chemical properties of glass to enhance its strength, light transmittance, transparency, and appearance.

[0003] The heating structure is an important component of a glass roller press, used to provide heating energy to heat the glass material. In modern glass roller presses, the glass sheet is placed directly on the heating surface of the heating structure during processing. The glass sheet softens due to heat conduction from the heating surface, and then it is pressed by rollers with microstructures.

[0004] There are some six-axis roll forming machines on the market that use multiple axes to control the movement of the roll forming machine and the positioning of the glass plate to achieve higher precision and control. However, these existing six-axis roll forming machines are usually large, complex to operate, and expensive, limiting them to high-end applications.

[0005] In ordinary roller pressing machines, the heating surface of the heating structure is partially covered by a glass plate during use, resulting in a low heat loss rate, while the other part is exposed, resulting in a high heat loss rate. This leads to an uneven temperature distribution in the heating block, and the glass plate will also experience uneven temperature distribution during heating. In severe cases, this can cause the glass plate to crack due to thermal stress and reduce its thermal expansion accuracy. Furthermore, placing the glass plate directly on the heating surface results in poor positioning accuracy of the glass plate during subsequent hot pressing, making it prone to displacement and reducing the hot pressing accuracy. Summary of the Invention

[0006] The purpose of this application is to provide a precision rolling equipment, which aims to solve the problems of how to improve the uniformity of heating of glass workpieces and improve the positioning accuracy of glass workpieces.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0008] A precision rolling mill is provided for hot pressing a workpiece, the workpiece being plate-shaped, the precision rolling mill comprising:

[0009] The roller pressing structure includes a housing with a hot pressing chamber, a roller rotatably disposed in the hot pressing chamber, and a driver for driving the roller to rotate. The bottom of the hot pressing chamber is provided with a clearance hole.

[0010] A movable structure, located below the roller, includes a horizontal moving component and a vertical moving component connected to the horizontal moving component; and

[0011] The heating and positioning structure is located below the clearance hole and includes a heating component connected to the vertical moving component and having a heating surface, and a positioning plate arranged above the heating component and covering and abutting the heating surface. The positioning plate has a positioning hole corresponding to the position of the heating surface. The heating surface is partially exposed at the positioning hole. The shape of the positioning hole is adapted to the workpiece, and the workpiece is received and positioned in the positioning hole and covers the heating surface at the positioning hole.

[0012] The beneficial effects of this application are as follows: the precision rolling equipment includes a rolling structure, a moving structure, and a heating and positioning structure. The heating and positioning structure includes a heating component and a positioning plate. The positioning plate is set above the heating surface and covers and abuts the heating surface, thereby reducing the heat loss rate at the heating surface and improving the uniformity of the temperature field of the heating surface. The positioning plate is provided with positioning holes, so that the glass plate can be placed and positioned in the positioning holes, improving the positioning accuracy of the glass plate and enabling the glass plate to remain stable during the rolling process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the precision rolling equipment provided in the embodiments of this application;

[0015] Figure 2 yes Figure 1 A partial explosion diagram of a precision roller pressing device;

[0016] Figure 3 yes Figure 2 A three-dimensional structural diagram of the heating positioning structure;

[0017] Figure 4 yes Figure 3 A cross-sectional schematic diagram of the heating positioning structure;

[0018] Figure 5 yes Figure 3 An exploded view of the heating positioning structure;

[0019] Figure 6 yes Figure 2A three-dimensional structural diagram of the heating positioning structure provided in another embodiment;

[0020] Figure 7 yes Figure 6 An exploded view of the heating positioning structure.

[0021] The following are the labeling elements in the figure:

[0022] 200. Precision roll forming equipment; 300. Roll forming structure; 301. Housing; 302. Driver; 303. Frame; 304. Roller; 305. Adapter; 400. Moving structure; 401. Horizontal moving assembly; 402. Inclined platform; 403. Vertical moving assembly; 404. Vacuum rotating heat-insulating platform; 3011. Hot pressing chamber; 3012. Clearance hole; 26. Alignment plate; 600. Glass plate; 261. Support plate; 263. Heat-insulating plate; 262. Fixing groove; 27. Cooling plate; 100. Heating Positioning structure; 10. Heating component; 11. Heating plate; 12. Heating block; 13. Flat plate; 121. Heating surface; 20. Positioning plate; 21. First plate; 211. Half plate; 22. Second plate; 23. Limiting part; 212. Heat shield; 24. Positioning hole; 241. Positioning groove; 31. Heat insulation platform; 32. Support platform; 321. Heat shield; 322. Base; 323. Connecting hole; 213. Connecting groove; 231. Through hole; 311. Limiting groove; 271. Fixing hole; 264. Alignment notch. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0025] Please see Figures 1 to 3 This application provides a precision rolling mill 200 for hot-pressing workpieces. The workpieces are plate-shaped. In this embodiment, the workpiece is a glass plate 600 made of optical glass. Optical glass has precise optical properties, which can control, focus, and disperse light, thereby realizing the function of optical devices. It is understood that the heating and positioning structure can bring the glass plate 600 to the glass transition point temperature so that the glass plate 600 can be subsequently rolled.

[0026] Please see Figures 1 to 6 The precision rolling mill 200 includes a rolling structure 300, a moving structure 400, and a heating and positioning structure on which a glass plate 600 is placed. The heating and positioning structure can heat the glass plate 600 to the glass transition point temperature, softening the glass plate 600 so that it can be rolled in an atmospheric environment.

[0027] Please see Figures 1 to 3 The roller pressing structure 300 includes a housing 301 with a hot pressing chamber 3011, a roller 304 rotatably disposed within the hot pressing chamber 3011, and a driver 302 for driving the roller 304 to rotate. The side surface of the roller 304 has microstructures, including micrometer-sized grooves and / or nanometer-sized grooves. The bottom of the hot pressing chamber 3011 has a clearance hole 3012, which communicates with the hot pressing chamber 3011.

[0028] Please see Figures 1 to 3 The moving structure 400 is located below the roller 304 and includes a horizontal moving component 401 and a vertical moving component 403 connected to the horizontal moving component 401; the heating positioning structure is located below the clearance hole 3012 and includes a heating component 10 connected to the vertical moving component 403 and having a heating surface 121, and a positioning plate 20 arranged above the heating component 10 and covering and abutting the heating surface 121. The positioning plate 20 has a positioning hole 24 at the position corresponding to the heating surface 121. The heating surface 121 is partially exposed at the positioning hole 24. The shape of the positioning hole 24 is adapted to the workpiece, and the workpiece is received and positioned in the positioning hole 24 and covers the heating surface 121 at the positioning hole 24.

[0029] The positioning plate 20 is made of ceramic material, which has excellent high-temperature resistance and can maintain its structural and performance stability under high-temperature environments. This makes ceramic material an ideal heat insulation material. Furthermore, ceramic material has low thermal conductivity, which effectively reduces heat conduction outward from the heating surface 121, reduces heat loss from the heating surface 121, and improves the uniformity of the temperature field of the heating surface 121. Positioning holes 24 are provided on the positioning plate 20 corresponding to the heating surface 121. A portion of the heating surface 121 is exposed at the positioning holes 24. The shape of the positioning holes 24 is adapted to the workpiece so that the glass plate 600 covers the exposed area of ​​the heating surface 121, and the workpiece is housed and positioned within the positioning holes 24, improving the positioning accuracy of the glass plate 600 and thus ensuring the stability of the glass plate 600 during subsequent hot pressing.

[0030] Please see Figures 1 to 3 It is understood that the vertical moving component 403 drives the heating positioning structure to move upward so that the glass plate 600 abuts against the roller 304 upward, the driver 302 drives the roller 304 to rotate, and the horizontal moving component 401 drives the glass plate 600 to move horizontally to make the glass plate 600 replicate the microstructure on the roller 304. The precision rolling equipment 200 provided in this embodiment includes a rolling structure 300, a moving structure 400, and a heating and positioning structure. The heating and positioning structure includes a heating component 10 and a positioning plate 20. The positioning plate 20 is disposed above the heating surface 121 and covers and abuts the heating surface 121, thereby reducing the heat loss rate at the heating surface 121 and improving the uniformity of the temperature field of the heating surface 121. The positioning plate 20 is provided with a positioning hole 24, so that the glass plate 600 can be placed and positioned in the positioning hole 24, improving the positioning accuracy of the glass plate 600. This ensures that the glass plate 600 remains stable during the rolling process of the roller 304, and the structure is simple and low in cost.

[0031] It is also understandable that the positioning plate 20 directly abuts against the heating surface 121, which can reduce the area of ​​the heating surface 121 in direct contact with oxygen, reduce the oxidation reaction of the heating surface 121, and improve the service life of the heating component 10.

[0032] Please see Figures 1 to 3 It is understood that in this embodiment, the glass plate 600 is rectangular in shape and the positioning hole 24 is also rectangular in shape. In other embodiments, the positioning plate 20 may also be circular in shape. There is no limitation here, and the choice can be made according to the actual situation.

[0033] Please see Figures 1 to 3 Optionally, the driver 302 can be a servo motor, the output shaft of which is connected to one end of the roller 304. The two ends of the roller 304 are rotatably mounted in the hot pressing chamber 3011 through two adapter seats 305.

[0034] Optionally, the heating positioning structure also includes a heat insulation platform 31, which is connected to the vertical lifting component, and the heating component 10 is disposed on the heat insulation platform 31. The heat insulation platform 31 is made of a material with good heat insulation performance, such as mica material. The heat insulation platform 31 can prevent the temperature of the vertical lifting component from getting too high.

[0035] Please see Figures 3 to 5 In some embodiments, the positioning plate 20 includes a first plate 21 and a second plate 22. The first plate 21 has a positioning groove 241, and the extension path of the positioning groove 241 is set along a first direction. One end of the second plate 22 is slidably disposed in the positioning groove 241 and forms a positioning hole 24 together with the inner wall of the positioning groove 241. The first direction is perpendicular to the axial direction of the roller 304.

[0036] Please see Figures 3 to 5 It is understandable that the glass plate 600 will expand along the first direction during the heating process. During the expansion of the glass plate 600, the second plate 22 will be pushed to move slightly along the first direction and outward from the positioning groove 241, so that the shape of the positioning hole 24 can be adapted to the shape of the expanded glass plate 600, thus preventing the glass from cracking due to over-positioning.

[0037] Please see Figures 3 to 5 In some embodiments, the positioning plate 20 further includes a limiting part 23 connected to the other end of the second plate 22 and an elastic member with elastic restoring force. One end of the elastic member is connected to the limiting part 23, and the other end of the elastic member abuts against the first plate 21. The second plate 22 moves a predetermined distance outward from the positioning groove 241 so that the elastic member is in a stretched state.

[0038] Please see Figures 3 to 5 It is understandable that there are two limiting parts 23, with two second plates 22 located between the two limiting parts 23, and the two limiting parts 23 and the second plates 22 are integrally formed to reduce costs. The elastic element can be a tube spring, with tube springs provided between the two limiting parts 23 and the first plate 21. When the second plate 22 moves outward toward the positioning groove 241, the elastic tension of the tube spring can keep the second plate 22 in contact with the glass plate 600, improving the positioning accuracy of the glass plate 600 and preventing the glass plate 600 from undergoing significant positional changes within the positioning hole 24.

[0039] Please see Figures 3 to 5Optionally, the side surface of the first plate 21 is also provided with a threaded hole, and the limiting part 23 is provided with a through hole 231 corresponding to the position of the threaded hole. One end of the bolt passes through the through hole 231 and is screwed into the threaded hole, thereby realizing the connection between the second plate 22 and the first plate 21. It is understood that the tightening force of the bolt should not be too large, so that the second plate 22 can move a certain distance relative to the first plate 21. This movement distance is generated by the expansion of the glass plate 600 along the first direction. During the heating process, the glass plate 600 will expand slightly and push the second plate 22 outward towards the positioning groove 241 so that the positioning hole 24 fits the glass plate 600, while avoiding the glass plate 600 from cracking.

[0040] Please see Figures 3 to 5 In some embodiments, the heating positioning structure further includes two support platforms 32 connected to the heat insulation platform 31. The two support platforms 32 are arranged at intervals along the second direction, and the heating component 10 is located between the two support platforms 32. The two ends of the first plate 21 are respectively connected to the two support platforms 32. The first direction and the second direction are orthogonal, and the axial direction of the roller 304 is parallel to the second direction.

[0041] Please see Figures 3 to 5 It is understandable that the support platform 32 can support the first plate 21, and the two ends of the first plate 21 along the second direction are respectively connected to the two support platforms 32, which can keep the first plate 21 stable during the heating process.

[0042] Please see Figures 3 to 5 In some embodiments, the support platform 32 has a connecting hole 323. The first plate 21 includes two mating half plates 211. Each half plate 211 has a connecting groove 213 at the position corresponding to the connecting hole 323, and the connecting groove 213 extends along the second direction. The heating positioning structure also includes a connector. One end of the connector passes through the connecting groove 213 and is located in the connecting hole 323. The connector can also be a bolt, and the connecting hole 323 can also be a threaded hole. One end of the bolt passes through the connecting groove 213 and is screwed into the connecting hole 323, thereby realizing the connection between the two half plates 211 and the two support platforms 32 respectively. At the same time, the tightening force of the bolt should not be too large, so that one half plate 211 can move a certain distance relative to the other half plate 211. This movement distance is generated by the expansion of the glass plate 600 along the second direction. That is, during the heating process, the glass plate 600 will expand slightly along the second direction and push the two half plates 211 to move away from each other, thereby preventing the glass plate 600 from cracking.

[0043] Please see Figures 3 to 5It is also understandable that the connecting groove 213 extends along the second direction, so that if the connecting hole 323 is misaligned with the predetermined position due to machining error during the processing, the bolt can be moved along the second direction to offset the machining error of the connecting hole 323, so that the bolt can be smoothly inserted into the connecting groove 213 and screwed into the connecting hole 323.

[0044] Understandably, during the process of the glass plate 600 being heated and expanding along the second direction, both half plates 211 can move slightly relative to each other along the second direction, thereby avoiding the glass plate 600 from being restricted in its expansion and thus breaking brittlely. At the same time, the two half plates 211 can be joined at one end to position the glass plate 600 and improve the positioning accuracy of the glass plate 600.

[0045] Please see Figures 3 to 5 In some embodiments, the support platform 32 includes a base 322 connected to the heat insulation platform 31 and a heat shield 321 connected to the base 322, and the first plate 21 is connected to the heat shield 321.

[0046] It is understandable that the base 322 and the heat shield 321 can also be made of ceramic material. The heat shield 321 can prevent the heat of the heating component 10 from being lost quickly from the side, thereby improving the uniformity of the temperature field at the heating surface 121.

[0047] Please see Figures 3 to 5 In some embodiments, the heating assembly 10 includes a heating block 12 having a heating surface 121 and a heating plate 11 connected to the heating block 12. The heating block 12 is provided on the side surface of the heating block 12, and the heating plate 11 is at least partially located in the heating hole.

[0048] Please see Figures 3 to 5 It is understood that the shape of the heating hole is adapted to the shape of the heating element 11. In this embodiment, the heating element 11 is a ceramic-copper block heating element 11. The ceramic-copper block heating element 11 is a heating element used to provide a heat source in high-temperature environments. It is composed of ceramic materials and copper blocks, combining the advantages of both materials. The ceramic part is usually made of high-temperature ceramic materials, such as alumina ceramics or silicon nitride ceramics. These ceramic materials have good high-temperature resistance and insulation properties, and can withstand thermal stress and electrical insulation requirements in high-temperature environments. The copper block part is used to provide current conduction and heat conduction functions. Copper has good electrical and thermal conductivity, which can effectively transfer electrical energy and heat energy to the ceramic part and distribute the heat energy evenly throughout the heating element 11. Two heating elements 11 are provided, and the two heating elements 11 are located at the two ends of the heating block 12, so that the glass plate 600 can be heated to its glass transition point temperature.

[0049] Please see Figures 3 to 5Optionally, the heating assembly 10 also includes a flat plate 13. The flat plate 13 is disposed on the heating surface 121 at a position corresponding to the positioning hole 24. The glass plate 600 is placed on the flat plate 13. The flat plate 13 can improve the flatness of the heating surface 121. The flat plate 13 is made of tungsten metal.

[0050] Please see Figures 3 to 5 It is also understandable that the flat sheet 13 can prevent high temperatures from being directly conducted to the glass plate 600, thus avoiding uneven heating of the glass plate 600. The flat sheet 13 can also resist the linear expansion and deformation of the material at the heating surface 121 caused by high temperatures. Under high temperatures, the strength, stiffness, shape, and oxidation reactions of many metallic materials will undergo significant changes. The flat sheet 13 can improve the flatness of the heating surface 121, keeping the glass plate 600 as horizontal as possible.

[0051] Please see Figures 3 to 5 In some embodiments, the two ends of the first plate 21 extend toward the heat insulation platform 31 with heat-blocking portions 212. The heat-blocking portions 212 are used to reduce the rate at which heat from the heating assembly 10 is lost from the heat-blocking portions 212, thereby improving the uniformity of the temperature field at the heating surface 121.

[0052] Please see Figures 3 to 5 In some embodiments, the heat insulation platform 31 has a limiting groove 311, with both ends of the limiting groove 311 extending to opposite side surfaces of the heat insulation platform 31. The heating component 10 is at least partially located in the limiting groove 311, and the support platform 32 is connected to the bottom of the limiting groove 311. The positioning groove 241 can be used to position the heating component 10 and the support platform 32, improving the convenience and reliability of assembling the heating component 10 and the support platform 32.

[0053] Please see Figures 3 to 5 The movable structure 400 also includes an inclined platform 402 for adjusting the level of the heating surface 121, with the horizontal moving component 401 and the vertical moving component 403 connected to its two ends respectively.

[0054] Optionally, the vertical moving component 403 is a ball screw lifting Z-platform, and the tilting platform 402 is a ball screw tilting platform 402. A vacuum rotating heat-insulating platform 404 is also provided between the vertical moving component 403 and the heat-insulating table 31, thereby minimizing the downward conduction of heat and improving the moving accuracy of the moving structure 400.

[0055] Understandably, the combination of the horizontal moving component 401, the vertical moving component 403, and the tilting platform 402 makes the moving structure 400 a six-axis moving system, which greatly improves the convenience and accuracy of the movement of the glass plate 600 relative to the roller 304.

[0056] Please see Figure 6 and Figure 7 In some embodiments, the positioning plate 20 includes two slidably mating alignment plates 26, each alignment plate 26 having an alignment notch 264, and the two alignment plates 26 together form a positioning hole 24 through the two alignment notches 264.

[0057] Please see Figure 6 and Figure 7 Optionally, the alignment notch 264 has an L-shaped groove structure, so that during the process of thermal expansion of the glass plate 600, the two alignment plates 26 can move slightly at the same time along the first direction and the second direction, thus preventing the glass plate 600 from breaking brittlely.

[0058] Please see Figure 6 and Figure 7 In some embodiments, the heating positioning structure further includes a cooling plate 27 with cooling channels, a heat-insulating block connected to the cooling plate 27, and a support plate 261 arranged on the cooling plate 27. Two support plates 261 are arranged at intervals, and the heating component 10 is located between the two support plates 261. Two alignment plates 26 are respectively connected to the two support plates 261. A heat-insulating block is provided between each support plate 261 and the heating component 10. The heating block 12 is connected to the cooling plate 27, and the cooling plate 27 is arranged on the heat insulation platform 31. The cooling plate 27 can reduce the rate at which heat is conducted to the heat insulation platform 31.

[0059] Please see Figure 6 and Figure 7 It is understandable that the connection between the support plate 261 and the cooling plate 27 can also adopt a hole and groove structure, that is, a fixing hole 271 is opened on the cooling plate 27, and a fixing groove 262 is opened on the support plate 261. The extension direction of the fixing groove 262 is along the first direction. The fixing member passes through the fixing groove 262 to connect and position it in the fixing hole 271 and maintain an appropriate locking force. Thus, when the glass expands along the first direction, it can push the two positioning plates 26 to move slightly along the first direction, avoiding the glass from breaking brittlely.

[0060] Please see Figure 6 and Figure 7 Optionally, the support plate 261 is also made of ceramic material and is integrally formed with the corresponding alignment plate 26. The heat-insulating block is made of metal material and is located between the side surfaces of the support plate 261 and the heating block 12. The heat-insulating block made of metal material can limit the instantaneous excessive flow of heat from the heating component 10 to the support plate 261, and prevent the support plate 261 from being locally overheated and cracking. The metal material can be alumina.

[0061] The roll forming structure 300 also includes a frame 303 supporting the housing 301. It is understood that the clearance hole 3012 can be sealed to meet the operating conditions of the hot pressing chamber 3011 in a vacuum environment, thereby improving the ease of use of the precision roll forming equipment 200.

[0062] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A precision roll press apparatus for hot pressing a workpiece, the workpiece being in the form of a sheet, characterized by, The precision rolling device comprises: a rolling structure, including a box body with a hot pressing cavity, a roller rotatably arranged in the hot pressing cavity, and a driver for driving the roller to rotate, the hot pressing cavity is provided with an avoiding hole at the bottom of the cavity; a moving structure, located below the roller and including a horizontal moving assembly and a vertical moving assembly connected to the horizontal moving assembly; and a heating positioning structure, located below the avoiding hole and including a heating assembly connected to the vertical moving assembly and having a heating surface, and a positioning plate arranged above the heating assembly and covering and abutting against the heating surface, the positioning plate is provided with a positioning hole corresponding to the position of the heating surface, the heating surface is partially exposed at the positioning hole, the shape of the positioning hole is matched with the workpiece, and the workpiece is accommodated and positioned in the positioning hole and covers the heating surface at the positioning hole; the positioning plate is made of ceramic material and has low thermal conductivity to reduce the outward conduction of heat at the heating surface and reduce the heat loss of the heating surface.

2. The precision roll press apparatus of claim 1, wherein: The positioning plate comprises a first plate and a second plate, the first plate is provided with a positioning groove, the extension path of the positioning groove is arranged along a first direction, one end of the second plate is slidingly arranged in the positioning groove and cooperates with the inner wall of the positioning groove to form the positioning hole, and the first direction is perpendicular to the axial direction of the roller.

3. The precision roll press apparatus of claim 2, wherein: The positioning plate further comprises a limiting portion connected to the other end of the second plate and an elastic member having elastic restoring force, one end of the elastic member is connected to the limiting portion, the other end of the elastic member abuts against the first plate, and the second plate moves a predetermined distance out of the positioning groove so that the elastic member is in a stretched state.

4. The precision roll press apparatus of claim 2, wherein: The heating positioning structure further comprises two support tables connected to the vertical moving assembly, the two support tables are arranged in a second direction and spaced apart, and the heating assembly is located between the two support tables, the two ends of the first plate are respectively connected to the two support tables, and the first direction is arranged orthogonally to the second direction.

5. The precision roll press apparatus of claim 4, wherein: The support table is provided with a connecting hole, the first plate comprises two half plates connected to each other, each half plate is provided with a connecting groove corresponding to the position of the connecting hole, and the connecting groove extends along the second direction, and the heating positioning structure further comprises a connecting piece, one end of the connecting piece passes through the connecting groove and is located in the connecting hole.

6. The precision roll press apparatus of claim 4, wherein: The support table comprises a base connected to the vertical moving assembly and a heat blocking plate connected to the base, and the first plate is connected to the heat blocking plate.

7. A precision roll press apparatus as claimed in any one of claims 2 to 6, wherein: The two ends of the first plate respectively extend heat blocking portions towards the vertical moving assembly, and the heat blocking portions are used to reduce the speed of heat loss of the heating assembly from the heat blocking portions.

8. The precision roll press apparatus of any of claims 1-6, wherein: The moving structure further comprises an inclined platform for adjusting the levelness of the heating surface, and the two ends of the inclined platform are respectively connected to the horizontal moving assembly and the vertical moving assembly.

9. The precision roll press apparatus of claim 1, wherein: The positioning plate comprises two alignment plates slidingly connected to each other, each alignment plate is provided with an alignment gap, and the two alignment plates cooperatively form the positioning hole through the two alignment gaps.

10. The precision roll press apparatus of claim 9, wherein: The heating positioning structure further comprises cooling plates provided with cooling flow channels, heat-blocking blocks connected to the cooling plates, and support plates arranged on the cooling plates, two of the support plates being arranged at intervals, the heating assembly being located between the two support plates, and two alignment plates being connected to the two support plates, respectively, and the heat-blocking blocks being arranged between any of the support plates and the heating assembly.

Images