A low expansion glass-ceramic crystallization method

Abstract

The present invention discloses a low-expansion microcrystalline glass crystallization method, which specifically includes the following steps: S1, cooling the rolled glass plate to the nucleation temperature for solidification, using laser cutting technology to cut the glass plate at high temperature and then transfer it to the glass plate lamination area; S2, moving the cut glass plate to the loading place, spraying a release agent on one side of the glass plate at the loading place through a spraying mechanism, and the present invention relates to the field of glass crystallization technology. The low-expansion microcrystalline glass crystallization method cools the original glass sheet to the nucleation temperature for solidification after leaving the rolling machine, using laser cutting technology to cut the glass plate at high temperature and then transfer it to the glass plate lamination area, dispersing a composite of silicon dioxide powder and boron carbide as a release agent on the high-temperature glass plate, and then vertically stacking the transported high-temperature glass plates, stacking them in sequence to the required number of layers, and then transferring them to a crystallization furnace for crystallization to obtain microcrystalline glass, which significantly improves the crystallization efficiency and yield rate, has a good crystallization effect, and reduces processing costs.

Description

Technical Field

[0001] The invention relates to the technical field of glass crystallization, in particular to a low-expansion microcrystalline glass crystallization method. Background Art

[0002] Low expansion microcrystalline glass crystallization generally involves annealing the rolled base glass and then heating it from a low temperature for nucleation and crystallization. The annealed base glass is usually cooled to room temperature and cut into plates. The base glass plates are then stacked together in a single layer or in layers. Isolation powder is usually used between the plates. The stacked base glass plates are generally 2-4 layers, plus the lower two layers of silicon carbide plates, a total of 4-6 layers, which are then put into a crystallization roller kiln for crystallization to obtain microcrystalline glass plates.

[0003] In the prior art, the glass is mostly annealed and cooled to room temperature, and then heated up for crystallization. This crystallization method has many steps, high energy consumption, high overall cost, low production efficiency, and cannot play a role in energy saving and consumption reduction. In the crystallization process of the glass plate, the release agent is usually manually sprayed and dispersed on the surface of the glass plate, and the manual operation efficiency is low. In addition, the upper and lower stacking method easily causes excessive pressure on the bottom glass, resulting in cracks, causing economic losses. Therefore, in view of the above shortcomings, the present invention makes the following improvements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a low-expansion glass-ceramics crystallization method, which solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A low expansion glass-ceramics crystallization method, specifically comprising the following steps:

[0006] S1, cooling the rolled glass sheet to the nucleation temperature for solidification, cutting the glass sheet at high temperature by laser cutting technology and transferring it to the glass sheet lamination area;

[0007] S2, moving the cut glass sheets to a loading station, spraying a release agent on one side of the glass sheets by a spraying mechanism at the loading station, and stacking a plurality of glass sheets vertically in sequence by the loading mechanism. During the stacking process, the limit laying mechanism controls two adjacent glass sheets to be closely fitted. After vertically stacking to the required number of layers, the stacked glass sheets are pushed into the placement frame by a push plate, and finally the placement frame is driven to move to the nucleation area of ​​the crystallization furnace, so as to perform nucleation on the stacked glass sheets;

[0008] S3, heating the crystal nucleus at a heating rate of 3°C / min, heating the nucleated laminated glass plate from the nucleation temperature of 720°C to the crystallization temperature of 870°C, and keeping the temperature for 40 minutes;

[0009] S4, quickly cool the crystallized laminated glass plate to 400°C, then slowly cool it to room temperature, and finally take it out of the kiln.

[0010] Preferably, it includes a stacking table, and the top surface of the stacking table is provided with an L-shaped support frame, the loading mechanism includes a first electric slide rail arranged on the top surface of the stacking table in front and back, a loading plate is slidably arranged between the top surfaces of the two first electric slide rails, and a negative pressure pump is fixedly arranged on one side of the loading plate, the front and back sides of one side of the loading plate are connected with a C-shaped exhaust pipe, and the exhaust port of the negative pressure pump is connected to the surface of the C-shaped exhaust pipe through a T-shaped pipe.

[0011] Preferably, the position-limiting paving mechanism comprises two sliding plates, electric push rods are fixedly provided inside the two sliding plates, a movable plate is fixedly provided at the protruding end of the electric push rod, and a rolling wheel is rotatably provided on one side of the movable plate.

[0012] Preferably, the push plate is arranged inside the L-shaped support frame, and hydraulic cylinders are fixedly arranged on both sides of the back side of the L-shaped support frame through connecting frames, and the protruding ends of the hydraulic cylinders are fixedly connected to the back side of the push plate, a support table is fixedly arranged on one side of the front side of the stacking table, and second electric slide rails are fixedly arranged on both sides of the top surface of the support table, the placement frame is slidably arranged between the top surfaces of the two second electric slide rails, and an L-shaped clamping plate is slidably arranged on one side of the placement frame, a threaded rod is rotatably arranged on one side of the placement frame, and one end of the threaded rod is rotatably connected to one side of the L-shaped clamping plate.

[0013] Preferably, the spraying mechanism includes a material barrel fixedly mounted on the top surface of an L-shaped support frame, a material distribution pipe is arranged on one side of the bottom surface of the L-shaped support frame, and a plurality of nozzles are arranged on one side of the surface of the material distribution pipe, the bottom surface of one side of the material barrel is connected with the top surface of the material distribution pipe through a discharge pipe, a telescopic section is arranged on the surface of the discharge pipe, and a control unit for driving the material distribution pipe to move up and down is arranged on the surface of the L-shaped support frame.

[0014] Preferably, the control unit includes a motor fixedly arranged on the top surface of an L-shaped support frame, and one end of the motor output shaft is fixedly provided with a first gear through a coupling, a threaded sleeve is rotatably arranged inside the L-shaped support frame, and the internal thread of the threaded sleeve is connected with a screw rod, the bottom end of the screw rod is connected to the top surface of the distribution pipe, and a second gear meshing with the first gear is fixedly arranged on the surface of the threaded sleeve.

[0015] Preferably, a material leakage trough is provided on one side inside the stacking platform, and a collecting frame is provided on the bottom surface of the material leakage trough, and a collecting box is provided inside the collecting frame.

[0016] The present invention provides a low-expansion glass-ceramics crystallization method, which has the following beneficial effects compared with the prior art:

[0017] (1) The low-expansion microcrystalline glass crystallization method is to cool the original glass sheet to the nucleation temperature after leaving the calender to solidify it, use laser cutting technology to cut the glass plate at high temperature and then transfer it to the glass plate lamination area, disperse the composite of silica powder and boron carbide as a release agent on the high-temperature glass plate, and then vertically stack the high-temperature glass plates that have been transported, and then transfer them to a crystallization furnace for crystallization to obtain microcrystalline glass after stacking the required number of layers in sequence, thereby significantly improving the crystallization efficiency and yield rate, achieving good crystallization effect, and reducing processing costs.

[0018] (2) The low-expansion microcrystalline glass crystallization method can stack multiple glass plates vertically in sequence through the coordinated arrangement of a feeding mechanism and a limit-laying mechanism, and place the laminated glass plates vertically on a stacking table so that the stacking table bears the pressure of each glass plate. The vertical stacking of multiple glass plates can greatly reduce the pressure on the glass plates caused by the upper and lower stacking layers, and each time a layer of glass plates is stacked, the rolling and squeezing of the rolling wheels can make the two adjacent glass plates fit closely together, further improving the uniformity of the release agent dispersion between the two, and improving the production quality of subsequent glass plates.

[0019] (3) The low-expansion microcrystalline glass crystallization method can automatically and evenly spray the release agent on the surface of the glass plate through the setting of the spraying mechanism, which is convenient for the subsequent stacking and setting of the glass plates. Manual spraying is not required, which improves the spraying efficiency of the release agent and reduces labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the position-limiting laying mechanism of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the push plate and the hydraulic cylinder of the present invention;

[0023] Figure 4 For the present invention Figure 1 A partial enlarged view of point A in the middle.

[0024] In the figure: 1. stacking table; 2. L-shaped support frame; 3. feeding mechanism; 31. first electric slide rail; 32. feeding plate; 33. negative pressure pump; 34. C-shaped exhaust pipe; 4. limit laying mechanism; 41. sliding plate; 42. electric push rod; 43. movable plate; 44. rolling wheel; 5. push plate; 6. spraying mechanism; 61. material barrel; 62. material distribution pipe; 63. nozzle; 64. motor; 65. first gear; 66. threaded sleeve; 67. screw rod; 68. second gear; 69. discharge pipe; 7. hydraulic cylinder; 8. support table; 9. second electric slide rail; 10. placement frame; 11. L-shaped clamping plate; 12. threaded rod; 13. collection box; 14. vertical plate; 15. third electric slide rail. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] See also Figures 1 to 4 As shown, the present invention provides a technical solution, a low expansion glass-ceramics crystallization method, which specifically includes the following steps:

[0028] S1. Cool the rolled glass sheet to the nucleation temperature for solidification, cut the glass sheet at high temperature by laser cutting technology, and transfer it to the glass sheet lamination area. Maintain a certain temperature in the glass sheet lamination area, such as near the annealing temperature, to avoid cracking when entering the crystallization furnace;

[0029] S2, moving the cut glass sheets to a loading station, spraying a release agent on one side of the glass sheets by a spraying mechanism 6 at the loading station, stacking a plurality of glass sheets vertically in sequence by a loading mechanism 3, and controlling two adjacent glass sheets to fit closely together during the stacking process by a position limiting laying mechanism 4, and after vertically stacking to a required number of layers, pushing the laminated glass sheets into a placing frame 10 by a pushing plate 5, and finally driving the placing frame 10 to move to a nucleation zone of a crystallization furnace, thereby nucleating the laminated glass sheets;

[0030] S3, heating the crystal nucleus at a heating rate of 3°C / min, heating the nucleated laminated glass plate from the nucleation temperature of 720°C to the crystallization temperature of 870°C, and keeping the temperature for 40 minutes;

[0031] S4, quickly cool the crystallized laminated glass plate to 400°C, then slowly cool it to room temperature, and finally take it out of the kiln.

[0032] Embodiment 2

[0033] Based on Example 1, please refer to Figure 1 and Figure 2 The specific improvements are as follows:

[0034] It includes a stacking table 1, and an L-shaped support frame 2 is arranged on the top surface of the stacking table 1, a vertical plate 14 is arranged between the L-shaped support frame 2 and the stacking table 1, the feeding mechanism 3 includes a first electric slide rail 31 arranged on the top surface of the stacking table 1 in front and back, a feeding plate 32 is slidably arranged between the top surfaces of the two first electric slide rails 31, and a negative pressure pump 33 is fixedly arranged on one side of the feeding plate 32, and the front and back sides of one side of the feeding plate 32 are both connected with a C-shaped exhaust pipe 34, and the exhaust port of the negative pressure pump 33 is connected with the surface of the C-shaped exhaust pipe 34 through a T-shaped pipe;

[0035] The position-limiting laying mechanism 4 comprises two sliding plates 41, the interior of the two sliding plates 41 is fixedly provided with an electric push rod 42, a through slot is provided inside the stacking platform 1, the surface of the L-shaped support frame 2 and the inner wall of the through slot are fixedly provided with a third electric slide rail 15, the upper and lower sliding plates 41 are respectively slidably connected with the surfaces of the two third electric slide rails 15, a movable plate 43 is fixedly provided at the protruding end of the electric push rod 42, and a rolling wheel 44 is rotatably provided on one side of the movable plate 43;

[0036] The glass sheet cut at high temperature is transferred to the left side of the loading plate 32, and the negative pressure pump 33 is started so that the negative pressure pump 33 extracts the air between the glass sheet and the loading plate 32 through the T-shaped tube and the C-shaped exhaust pipe 34, so that the glass sheet is adsorbed on the left side of the loading plate 32, and the first electric slide rail 31 is started to drive the loading plate 32 to move leftward, so that the currently adsorbed glass sheet is pushed leftward by the loading plate 32, until the glass sheet is pushed to the right side of the vertical plate 14, so that the glass sheet contacts the right side of the vertical plate 14;

[0037] Then, the loading plate 32 is controlled to slide to the right until it moves to the initial position. During the movement, the extended end of the electric push rod 42 is synchronously controlled to drive the movable plate 43 to move, so that the upper and lower movable plates 43 are relatively close to each other, and the two rolling wheels 44 are synchronously close to each other to limit the glass plate on the right side of the vertical plate 14. Similarly, another glass plate is transferred to the left side of the loading plate 32 and adsorbed and fixed, and the release agent is sprayed on the left side of the glass plate. After the spraying is completed, the loading plate 32 is controlled to move to the left by the same operation as above until the upper and lower movable plates 43 are relatively close to each other. The glass plate on the left side of the material plate 32 contacts the glass plate on the right side of the vertical plate 14. At this time, the sliding plate 41 is controlled to move to the right through the third electric slide rail 15, so that the two rolling wheels 44 contact the right side of the laminated glass plate for limiting. The electric push rod 42 is started, so that the extended end of the electric push rod 42 drives the rolling wheel 44 to move up and down through the movable plate 43, so that the adjacent glass plates are in close contact, so that the release agent is evenly dispersed between the two glass plates. According to the same operation as above, the corresponding number of glass plates can be stacked in sequence according to needs.

[0038] Embodiment 3

[0039] Based on Example 2, please refer to Figure 1 and Figure 4 The specific improvements are as follows:

[0040] The spraying mechanism 6 includes a material barrel 61 fixedly arranged on the top surface of the L-shaped support frame 2, a pressure pump is arranged inside the material barrel 61, and the discharge port of the pressure pump is connected to one end of the discharge pipe 69, a leakage groove is opened on one side of the inside of the stacking table 1, and a collecting frame is arranged on the bottom surface of the leakage groove, and a collecting box 13 is arranged inside the collecting frame, a distribution pipe 62 is arranged on one side of the bottom surface of the L-shaped support frame 2, and a plurality of nozzles 63 are arranged on one side of the surface of the distribution pipe 62, and the bottom surface of one side of the material barrel 61 is connected to the distribution pipe 69 through the discharge pipe 69. The top surfaces of the tubes 62 are connected, the surface of the discharge tube 69 is provided with a telescopic section, the surface of the L-shaped support frame 2 is provided with a control unit for driving the distribution tube 62 to move up and down, the control unit includes a motor 64 fixedly provided on the top surface of the L-shaped support frame 2, and one end of the output shaft of the motor 64 is fixedly provided with a first gear 65 through a coupling, the inside of the L-shaped support frame 2 is provided with a threaded sleeve 66 for rotation, and the internal thread of the threaded sleeve 66 is connected with a screw rod 67, and the bottom end of the screw rod 67 is connected to the top surface of the distribution tube 62;

[0041] When the glass plate is adsorbed and fixed on the left side of the loading plate 32, the pressure pump is started so that the pressure pump sprays the release agent inside the barrel 61 on the left side of the glass plate through the discharge pipe 69, the distribution pipe 62 and the nozzle 63. The release agent is a composite of silicon dioxide powder and boron carbide. During the spraying process, the motor 64 is started so that the motor 64 drives the threaded sleeve 66 to rotate through the first gear 65 and the second gear 68, and the screw 67 drives the distribution pipe 62 to descend. At this time, the telescopic section of the discharge pipe 69 is extended, and the nozzle 63 descends synchronously with the distribution pipe 62, so that the release agent can be evenly sprayed, and the excess release agent falls into the collection box 13 through the leakage trough for collection to avoid waste and can be recycled later.

[0042] Embodiment 4

[0043] Based on Example 3, please refer to Figure 1 and Figure 3 The specific improvements are as follows:

[0044] The push plate 5 is arranged inside the L-shaped support frame 2, and hydraulic cylinders 7 are fixedly arranged on both sides of the back side of the L-shaped support frame 2 through connecting frames, and the protruding end of the hydraulic cylinder 7 is fixedly connected to the back side of the push plate 5, and a support table 8 is fixedly arranged on one side of the front side of the stacking table 1, and second electric slide rails 9 are fixedly arranged on both sides of the top surface of the support table 8, and the placement frame 10 is slidably arranged between the top surfaces of the two second electric slide rails 9, and an L-shaped clamping plate 11 is slidably arranged on one side of the placement frame 10, and a threaded rod 12 is rotatably arranged on one side of the placement frame 10, and one end of the threaded rod 12 is rotatably connected to one side of the L-shaped clamping plate 11;

[0045] Start the hydraulic cylinder 7, and the extended end of the hydraulic cylinder 7 drives the push plate 5 to move toward the front. The laminated glass plate can be pushed into the placement frame 10 at a uniform speed through the push plate 5. Then rotate the threaded rod 12 so that the threaded rod 12 drives the L-shaped clamping plate 11 to move to the left, so as to clamp and limit the glass plate. Then start the second electric slide rail 9, and drive the placement frame 10 to move through the second electric slide rail 9. Finally, drive the placement frame 10 to move into the crystallization furnace for subsequent processing.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low expansion glass-ceramics crystallization method, characterized in that: The specific steps include: S1, cooling the rolled glass sheet to the nucleation temperature for solidification, cutting the glass sheet at high temperature by laser cutting technology and transferring it to the glass sheet lamination area; S2, moving the cut glass plates to a loading station, spraying a release agent on one side of the glass plates by a spraying mechanism (6) at the loading station, stacking the plurality of glass plates vertically in sequence by the loading mechanism (3), and controlling the close fit between two adjacent glass plates by a limit laying mechanism (4) during the stacking process. After vertically stacking the required number of layers, the stacked glass plates are pushed into the placement frame (10) by a push plate (5), and finally the placement frame (10) is driven to move to the nucleation zone of the crystallization furnace, thereby nucleating the stacked glass plates; S3, heating the crystal nucleus at a heating rate of 3°C / min, heating the nucleated laminated glass plate from the nucleation temperature of 720°C to the crystallization temperature of 870°C, and keeping the temperature for 40 minutes; S4, rapidly cooling the crystallized laminated glass plate to 400°C, then slowly cooling it to room temperature, and finally taking it out of the kiln; The stacking platform (1) is also provided with an L-shaped support frame (2) on the top surface of the stacking platform (1), the position-limiting laying mechanism (4) comprising two sliding plates (41), a through slot being provided inside the stacking platform (1), a third electric slide rail (15) being fixedly provided on the surface of the L-shaped support frame (2) and the inner wall of the through slot, the upper and lower sliding plates (41) being respectively slidably connected to the surfaces of the two third electric slide rails (15), an electric push rod (42) being fixedly provided inside the two sliding plates (41), a movable plate (43) being fixedly provided at the extended end of the electric push rod (42), and a rolling wheel (44) being rotatably provided on one side of the movable plate (43), the movable plate (43) being driven to move by controlling the extended end of the electric push rod (42), so that the upper and lower movable plates (43) are relatively close to each other, and the two rolling wheels (44) are synchronously close to each other for position-limiting support of the glass plate on the right side of the vertical plate (14).

2. A low expansion glass-ceramics crystallization method according to claim 1, characterized in that: The loading mechanism (3) comprises first electric slide rails (31) arranged front and rear on the top surface of the stacking platform (1); a loading plate (32) is slidably arranged between the top surfaces of the two first electric slide rails (31); a negative pressure pump (33) is fixedly arranged on one side of the loading plate (32); the front and back sides of one side of the loading plate (32) are both connected to a C-shaped exhaust pipe (34); and the exhaust port of the negative pressure pump (33) is connected to the surface of the C-shaped exhaust pipe (34) via a T-shaped pipe.

3. A low expansion glass-ceramics crystallization method according to claim 1, characterized in that: The push plate (5) is arranged inside the L-shaped support frame (2), and hydraulic cylinders (7) are fixedly arranged on both sides of the back of the L-shaped support frame (2) through connecting frames, and the protruding ends of the hydraulic cylinders (7) are fixedly connected to the back of the push plate (5). A support table (8) is fixedly arranged on one side of the front of the stacking table (1), and second electric slide rails (9) are fixedly arranged on both sides of the top surface of the support table (8). The placement frame (10) is slidably arranged between the top surfaces of the two second electric slide rails (9), and an L-shaped clamping plate (11) is slidably arranged on one side of the placement frame (10). A threaded rod (12) is rotatably arranged on one side of the placement frame (10), and one end of the threaded rod (12) is rotatably connected to one side of the L-shaped clamping plate (11).

4. A low expansion glass-ceramics crystallization method according to claim 1, characterized in that: The spraying mechanism (6) comprises a material barrel (61) fixedly arranged on the top surface of an L-shaped support frame (2); a material distribution pipe (62) is arranged on one side of the bottom surface of the L-shaped support frame (2); and a plurality of nozzles (63) are arranged on one side of the surface of the material distribution pipe (62); the bottom surface of one side of the material barrel (61) is connected to the top surface of the material distribution pipe (62) via a discharge pipe (69); a telescopic section is arranged on the surface of the discharge pipe (69); and a control unit for driving the material distribution pipe (62) to move up and down is arranged on the surface of the L-shaped support frame (2).

5. A low expansion glass-ceramics crystallization method according to claim 4, characterized in that: The control unit comprises a motor (64) fixedly arranged on the top surface of the L-shaped support frame (2), and a first gear (65) is fixedly arranged on one end of the output shaft of the motor (64) via a coupling, a threaded sleeve (66) is rotatably arranged inside the L-shaped support frame (2), and a screw rod (67) is connected to the internal thread of the threaded sleeve (66), the bottom end of the screw rod (67) is connected to the top surface of the material distribution pipe (62), and a second gear (68) meshing with the first gear (65) is fixedly arranged on the surface of the threaded sleeve (66).

6. A low expansion glass-ceramics crystallization method according to claim 1, characterized in that: A material leakage trough is provided on one side of the stacking platform (1), and a collecting frame is provided on the bottom surface of the material leakage trough, wherein a collecting box (13) is provided inside the collecting frame.

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