A production process and equipment for 15-19mm thick borosilicate glass plates

Abstract

This invention discloses a production process and equipment for 15-19mm borosilicate glass ultra-thick plates, relating to the field of float glass technology. The process includes: Step 1, raw material preparation; Step 2, melting; Step 3, forming and annealing; and Step 4, cold end treatment. After the glass strip enters the cold end unit, it sequentially undergoes fully automatic defect monitoring, speed measurement, longitudinal cutting, transverse cutting, pre-cracking, transverse bending, separation, edge bending, and longitudinal splitting to form a raw sheet. By adding a pre-cracking process, after the glass strip is transversely cut, a laser scans along the tangent line to generate 0.1-0.3mm microcracks, guiding the transverse bending direction, reducing the difficulty of crack initiation, and eliminating the randomness of the crack initiation point. Furthermore, in the transverse bending process, multiple lifting mechanisms are used for synchronous lifting. The lifting mechanism in the middle induces initial cracks, precisely matching the pre-cracking line generated in the pre-cracking process, thus avoiding stress dispersion.

Description

Technical Field

[0001] This invention relates to the field of float glass technology, specifically to a production process and equipment for 15-19mm thick borosilicate glass plates. Background Technology

[0002] Float glass is generally defined as thicker than 8mm. The main challenge in producing thicker sheets compared to standard thicknesses lies in process control. Because the molten glass flowing into the tin bath from the melting furnace is continuous, the quality of the produced glass will not fluctuate with changes in thickness unless other factors influence it. Therefore, the quality of ultra-thick sheets depends primarily on the subsequent forming, annealing, and cold-end treatment processes.

[0003] The cold end treatment includes the horizontal bending process after the glass strip is cut. In this process, due to the large thickness and high hardness of 15-19mm borosilicate glass, it is difficult for the glass plate to crack during the traditional lifting and bending process. The crack initiation point is prone to randomness, which leads to the deviation of the microcrack propagation path, resulting in uneven fracture or edge chipping. Summary of the Invention

[0004] The purpose of this invention is to provide a production process and equipment for 15-19mm thick borosilicate glass plates, solving the technical problem that due to the large thickness and high hardness of 15-19mm borosilicate glass, it is difficult for the glass plate to crack during traditional lifting and breaking, the crack initiation point is prone to randomness, resulting in the deviation of the microcrack propagation path, and thus the fracture surface is not straight or the edge is chipped.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A manufacturing process for 15-19mm thick borosilicate glass plates includes the following steps:

[0007] Step 1: Raw material preparation: Weigh the raw materials stored in the raw material workshop and feed them into the mixing equipment for mixing to obtain a mixture.

[0008] Step 2, Melting: The mixture is added to the melting furnace in a measured amount according to requirements. After high-temperature melting, clarification, homogenization, and cooling, it forms qualified glass liquid and flows into the liquid flow channel.

[0009] Step 3, Forming and Annealing: The molten glass enters the tin bath from the flow channel. The molten glass spreads and expands naturally on the surface of the molten tin. Under the control of mechanical pulling, edge blocking and edge pulling machine, it forms a glass strip with a set width and thickness. It is gradually cooled and enters the annealing furnace through the transition roller table for annealing and cooling. After cooling to the set temperature, it leaves the annealing furnace and enters the cold end unit.

[0010] Multiple sets of edge-pulling machines are symmetrically arranged at both ends of the tin bath, with the first pair of edge-pulling machines on the side closest to the beginning of the tin bath being 7-9m away from the beginning of the tin bath.

[0011] Step 4, Cold End Processing: After the glass ribbon enters the cold end unit, it goes through fully automatic defect monitoring, speed measurement, longitudinal cutting, transverse cutting, pre-cracking, transverse bending, separation, edge bending, and longitudinal splitting in sequence to form the original sheet;

[0012] The pre-cracking process involves scanning along the transverse cutting line with a laser after the glass strip is transversely cut to generate microcracks, which guide the transverse breakage direction.

[0013] The horizontal bending process employs multiple sets of lifting mechanisms for synchronous lifting, with the lifting mechanism in the middle inducing the initial cracks.

[0014] As a further aspect of the present invention, the depth of the microcrack is 0.1-0.3 mm.

[0015] As a further aspect of the present invention: the lifting mechanism is provided in three sets, and the three sets of lifting mechanisms are arranged in a straight line perpendicular to the glass belt conveying direction.

[0016] As a further aspect of the present invention: it includes a conveyor line, wherein a positioning mechanism and a pre-splitting mechanism are sequentially arranged at the top of the input end of the conveyor line along the conveying direction;

[0017] The conveyor line is equipped with a horizontal bending mechanism, which is located at the rear end of the pre-crack mechanism and performs a horizontal bending operation on the glass strip processed by the pre-crack mechanism.

[0018] As a further embodiment of the present invention: the conveyor line includes conveyor supports symmetrically arranged at both ends, and multiple sets of conveyor rollers are rotatably arranged between the two conveyor supports;

[0019] Multiple sets of conveying rollers convey the glass strip along the conveying direction.

[0020] As a further aspect of the present invention: the positioning mechanism includes a mounting bracket disposed at the input end of the conveyor line, and a line scan camera is disposed on one side of the mounting bracket.

[0021] As a further aspect of the present invention: the pre-splitting mechanism includes fixed supports on both sides, and mounting base plates are installed on the fixed supports on both sides. A linear module is installed on the bottom of the mounting base plate, and a laser is installed on the movable seat of the linear module.

[0022] Pre-cracking is performed using the laser.

[0023] As a further embodiment of the present invention: the horizontal bending mechanism includes a mounting base, a limiting plate is provided on the mounting base, and multiple sets of lifting mechanisms arranged in a straight line are slidably arranged on the limiting plate;

[0024] A limit mechanism is provided above the conveyor line.

[0025] As a further embodiment of the present invention: the lifting mechanism includes a movable base slidably disposed on the limiting plate, the bottom of the movable base is connected to an ejection cylinder, and the other end of the ejection cylinder is connected to the mounting base;

[0026] A lifting roller is fixed on the movable base;

[0027] The lifting roller in the middle section is provided with a flexible boss.

[0028] As a further aspect of the present invention: the limiting mechanism includes a connecting frame installed on the top of the two side conveying brackets, and the connecting frame is provided with a limiting pressure wheel rotatably corresponding to the position of each group of lifting mechanisms.

[0029] The beneficial effects of this invention are:

[0030] By adding a pre-cracking process, after the glass strip is transversely cut, a laser scans along the tangent to generate microcracks of 0.1-0.3mm, guiding the transverse breaking direction, reducing the difficulty of crack initiation, eliminating the randomness of the crack initiation point, and further employing multiple sets of lifting mechanisms to lift synchronously in the transverse breaking process. The lifting mechanism in the middle induces the initial crack, accurately matching the pre-crack line generated in the pre-cracking process, thus avoiding stress dispersion.

[0031] In this invention, a transverse cutting line is generated on the transversely cut glass strip. The glass strip with the transverse cutting line is introduced from the input end of the conveyor line, and the positioning mechanism captures the glass edge, matches the transverse cutting line, and outputs the position to the pre-crack mechanism. The pre-crack mechanism adapts to the position and starts scanning along the transverse cutting line to generate a pre-crack line. The lifting roller in the middle, through a flexible boss, first contacts the bottom surface of the glass strip, pushing the glass strip and cooperating with the limiting pressure roller to induce an initial crack along the pre-crack line. After that, all lifting roller shaft surfaces are in contact with the bottom surface of the glass strip. Starting from the initial crack, the glass strip is broken laterally along the pre-crack line. After the glass strip is broken, the lifting mechanism resets, and the conveyor line continues to transport the glass strip for the next breaking process. Attached Figure Description

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the production process of the present invention;

[0034] Figure 2 This is a schematic diagram of the deflection direction of the edge-pulling machine of the present invention;

[0035] Figure 3 This is a schematic diagram of the production equipment of the present invention. Figure 1 ;

[0036] Figure 4 This is a schematic diagram of the production equipment of the present invention. Figure 2 ;

[0037] Figure 5 This is a schematic diagram of the conveyor line structure of the present invention. Figure 1 ;

[0038] Figure 6 This is a schematic diagram of the conveyor line structure of the present invention. Figure 2 ;

[0039] Figure 7 This is a schematic diagram of the horizontal bending mechanism of the present invention;

[0040] Figure 8 This is a schematic diagram of the limiting mechanism structure of the present invention;

[0041] Figure 9 This is a schematic diagram showing the position of the lifting mechanism and the glass strip of the present invention;

[0042] Figure 10 This is a schematic diagram of the lifting position of the present invention.

[0043] In the diagram: 100, conveyor line; 101, conveyor support; 102, conveyor roller; 103, synchronous belt; 104, tensioning wheel; 105, drive motor; 106, first transmission platform; 107, second transmission platform; 108, synchronous wheel; 109, protective shell; 200, positioning mechanism; 201, mounting bracket; 202, line array camera; 300, pre-splitting mechanism; 301, fixed bracket; 302, mounting base; 303, linear module; 304, laser; 400, horizontal bending mechanism; 401, mounting base; 402, limiting plate; 403, moving base; 404, ejection cylinder; 405, lifting roller; 406, flexible boss; 407, connecting frame; 408, limiting pressure roller; 409, telescopic rod; 500, glass belt; 501, pre-splitting line. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figure 1As shown, this embodiment provides a production process for 15-19mm borosilicate glass ultra-thick plates. By adding a pre-cracking process, after the glass strip is transversely cut, a laser 304 scans along the tangent to generate microcracks of 0.1-0.3mm, guiding the transverse breaking direction, reducing the difficulty of crack initiation, and eliminating the randomness of the crack initiation point. Furthermore, in the transverse breaking process, multiple sets of lifting mechanisms are used to lift synchronously. The lifting mechanism in the middle induces the initial crack, accurately matching the pre-crack line 501 generated in the pre-cracking process, thus avoiding stress dispersion.

[0047] This embodiment describes a production process for 15-19mm thick borosilicate glass plates, including the following steps:

[0048] Step 1: Raw material preparation: Weigh the raw materials stored in the raw material workshop and feed them into the mixing equipment for mixing to obtain a mixture.

[0049] The main raw materials for the production of ultra-thick borosilicate glass include various inorganic minerals such as quartz sand, borax, boric acid, and soda ash; ensuring high purity and low impurities in the raw materials to meet strict quality standards.

[0050] Based on the desired chemical composition and properties of ultra-thick borosilicate glass plates, the amount of each raw material is precisely calculated, and the precise proportion of different raw materials is determined through complex stoichiometric relationships.

[0051] Using efficient mixing equipment, such as a high-power V-type mixer or a double cone mixer, the raw materials weighed in the specified proportions are thoroughly mixed. The mixing process must ensure high uniformity to prevent the raw materials from separating or segregating, providing a stable mixture for subsequent melting. The prepared mixture is then transferred and lifted to the kiln head silo via a belt conveyor for later use.

[0052] Step 2, Melting: The mixture is added to the melting furnace in a measured amount according to requirements. After high-temperature melting, clarification, homogenization, and cooling, it forms qualified glass liquid and flows into the liquid flow channel.

[0053] The melting furnace can be an all-electric melting furnace, which uses electric current to generate heat through electrodes to melt the raw materials;

[0054] The melting furnace features a rotating top automatic feeding system with automatic liquid level control. Melting is achieved using a molybdenum motor, with a combination of side-mounted and bottom-mounted electrodes (three layers in total). Electrodes utilize thyristor-controlled power adjustment and constant flow control. The liquid level, flame reversal, furnace pressure, and furnace temperature within the furnace are all automatically controlled. This all-electric melting furnace is existing technology, and its specific structure and operation will not be detailed here.

[0055] After the mixture is melted, clarified, homogenized and cooled at high temperature, it forms qualified glass liquid and flows into the flow channel at a temperature of about 1200℃. The flow channel regulating gate controls the glass liquid volume.

[0056] Step 3, Forming and Annealing: The molten glass enters the tin bath from the flow channel. The molten glass spreads and expands naturally on the surface of the molten tin. Under the control of mechanical pulling, edge blocking and edge pulling machine, it forms a glass strip with a set width and thickness. It is gradually cooled and enters the annealing furnace through the transition roller table for annealing and cooling. After cooling to the set temperature, it leaves the annealing furnace and enters the cold end unit.

[0057] The cooling temperature is set to be below 70 degrees Celsius, and the glass strip leaves the annealing furnace at a temperature below 70 degrees Celsius.

[0058] Multiple sets of edge-pulling machines are symmetrically arranged at both ends of the tin bath, with the first pair of edge-pulling machines on the side closest to the beginning of the tin bath being 7-9m away from the beginning of the tin bath.

[0059] And such as Figure 2 As shown, with the direction perpendicular to the flow of molten glass in the tin bath as the O-axis, the specific parameters of multiple edge-pulling machines can be set as follows:

[0060]

[0061] On the surface of the molten glass and molten tin, the thickness and width of the glass strip are controlled by setting parameters for the edge-drawing machine, in conjunction with the main drive, electric heating of the tin bath, and cooling water tank. The linear speed of the edge-drawing machine decreases sequentially from the source of the molten glass feed tank towards the glass plate outlet, thus drawing and shaping the glass strip.

[0062] The annealing furnace is electrically controlled and features automatic temperature control in designated zones to eliminate internal stress in the products. The furnace is divided into three zones horizontally (upper and lower) and vertically (A, B, C, and F, open zones). Zone A has co-current hot air flow, Zone B has counter-current hot air flow, and Zone C has counter-current hot air flow. The electric butterfly valves are selected based on the lowest possible air leakage. Temperature measurement points in the sealed zones are located on the second-to-last section of each zone. Infrared thermometers are not used in the sealed zones. Three infrared thermometers are installed in each of the open zones. Adjustable baffles are installed at the top of each zone, and baffle walls are installed at the bottom.

[0063] Step 4, Cold End Processing: After the glass ribbon enters the cold end unit, it goes through fully automatic defect monitoring, speed measurement, longitudinal cutting, transverse cutting, pre-cracking, transverse bending, separation, edge bending, and longitudinal splitting in sequence to form the original sheet;

[0064] The fully automated defect monitoring process incorporates a fully automated online defect detector, eliminating the uncertainties introduced by manual judgment. It can inspect each product piece individually, automatically record quality information and classify product defects, save data, and integrate it into the factory's industrial internet system. This enables an intelligent process for precise defect location, rapid cause analysis, and timely process adjustments. Simultaneously, a complementary online optimized cutting system allows for optimized cutting of products with minor defects, thereby improving yield.

[0065] The pre-cracking process involves scanning along the transverse cutting line using a laser 304 after the glass strip is transversely cut, generating microcracks of 0.1-0.3mm to guide the transverse breakage direction. The laser 304 is a pulsed CO2 laser, such as the Han's GLC-CO2-3000P (with a peak power ≥3kW, pulse width 10-50μs, and a long depth-of-focus optical system). To ensure precise initiation of the laser pre-cracking, a linear array camera (Basler raL2048-48gm, 2048 pixels / line) is installed between the cutting station and the pre-cracking station to capture the glass edge in real time and match it with the transverse cutting line generated by the cutting station (the transverse cutting line is preset as the pre-cracking line marker). If the match is successful, a control signal is output to the PLC controller for adjustment and control.

[0066] Further points to note include maintaining a distance of at least 1.2m from the cutting point to avoid the dust diffusion zone, and using a 630nm anti-reflection coating on the camera lens to reduce reflectivity.

[0067] The horizontal bending process employs a multi-segment lifting mechanism for synchronous lifting, with the central lifting mechanism creating a localized high-stress zone to induce initial cracks. Precise matching of the pre-crack line 501 (0.1-0.3mm microcracks) generated during the pre-cracking process is used to avoid stress dispersion.

[0068] Example 2

[0069] This embodiment provides a production equipment for 15-19mm borosilicate glass ultra-thick plates. This equipment is applied in the cold end treatment process of Embodiment 1 to optimize the process and improve the quality of the finished product.

[0070] like Figure 3 and Figure 4 As shown, the above-mentioned production equipment includes a conveyor line 100 embedded in the production line for 15-19mm borosilicate glass ultra-thick plates. A positioning mechanism 200 and a pre-cracking mechanism 300 are sequentially arranged at the top of the input end of the conveyor line 100 along the conveying direction. A horizontal bending mechanism 400 is arranged on the conveyor line 100. The horizontal bending mechanism 400 is located at the rear end of the pre-cracking mechanism 300 and performs a horizontal bending operation on the glass strip 500 after it has been processed by the pre-cracking mechanism 300.

[0071] After being transversely cut, a transverse cutting line is generated on the glass strip 500. The glass strip 500 with the transverse cutting line is introduced from the input end of the conveyor line 100. The positioning mechanism 200 captures the glass edge, matches the transverse cutting line, and outputs the position to the pre-crack mechanism 300. The pre-crack mechanism 300 starts scanning along the transverse cutting line according to the position to generate a pre-crack line 501. Then, the transverse breaking mechanism 400 breaks the glass strip 500. The broken glass part continues to be conveyed for other processing steps.

[0072] Specific examples Figures 2-4As shown, the conveyor line 100 in this embodiment includes conveyor supports 101 at both ends. Multiple sets of conveyor rollers 102 are rotatably arranged between the conveyor supports 101 at both ends. The multiple sets of conveyor rollers 102 can be divided into multiple conveyor systems in sequence along the conveying direction according to the conveying distance. Each conveyor system can move independently. When moving independently, each conveyor system is driven by a set of drive sources. Alternatively, multiple conveyor systems can cooperate with each other to achieve synchronous conveying, avoiding the influence of conveying speed difference on the pre-splitting operation. When multiple conveyor systems cooperate with each other, they are powered by a set of drive sources to move.

[0073] In this embodiment, multiple sets of conveying rollers 102 are divided into two conveying systems along the conveying direction as an example.

[0074] Multiple sets of conveyor rollers 102 in both conveyor systems are connected to synchronous pulleys 108 through one side of the conveyor support 101. Multiple synchronous pulleys 108 in each conveyor system are synchronously driven by a synchronous belt 103. One conveyor roller 102 located in the middle is connected to two synchronous pulleys 108 at one end. The synchronous belts 103 of the two conveyor systems are respectively connected to the corresponding synchronous pulleys 108. Multiple sets of tensioning pulleys 104 are also provided on the conveyor support 101 on the same side. The tensioning pulleys 104 limit and tension the synchronous belt 103 to ensure the stability of the transmission.

[0075] Furthermore, a first transmission platform 106 and a second transmission platform 107 are connected between the two conveying systems via a connecting column. Two synchronous pulleys 108 are provided on the first transmission platform 106, and one of the synchronous pulleys 108 is located on the conveying roller 102 that is connected to both conveying systems. One synchronous pulley 108 is provided on the second transmission platform 107, and a drive motor 105 is fixedly installed on the outer side of the second transmission platform 107. The output shaft of the drive motor 105 is connected to the synchronous pulley 108 at the corresponding position. The three synchronous pulleys 108 on the first transmission platform 106 and the second transmission platform 107 are connected by a synchronous belt 103. Power is provided by the drive motor 105 to drive the conveying roller 102 in the two conveying systems to move synchronously, thereby realizing the conveying of the glass belt in the front-end process.

[0076] It should be further noted that the transmission side of the conveyor line 100 in this embodiment is provided with a protective shell 109 for protection.

[0077] Furthermore, such as Figure 6As shown, in this embodiment, the positioning mechanism 200 includes a mounting bracket 201 disposed at the input end of the conveyor line 100. A line scan camera 202 is disposed on one side of the mounting bracket 201. The line scan camera 202 corresponds to the end of the cutting line on one side of the glass strip. The line scan camera 202 can be a Basler RAL2048-48gm with 2048 pixels / line, which captures the glass edge in real time and matches the transverse cutting line generated by the cutting station. If the match is successful, a signal is output to the PLC for adjustment and control. The PLC controller is located in the electrical control box of the production line, which is existing technology and will not be described in detail here.

[0078] Furthermore, such as Figures 4-6 As shown, in this embodiment, the pre-crack mechanism 300 includes fixed supports 301 disposed on both sides of the conveyor line 100. Mounting substrates 302 are mounted on the fixed supports 301. A linear module 303 is mounted on the bottom of the mounting substrate 302. A laser 304 is mounted on the movable seat of the linear module 303. By scanning along the transverse cutting line on the glass strip, microcracks of 0.1-0.3 mm are generated, guiding the transverse breaking direction. The laser 304 can be a pulsed CO2 laser.

[0079] When the PLC controller receives the signal transmitted by the linear array camera 202 in the positioning mechanism 200, it starts the linear module 303 after a set delay time, driving the laser 304 to scan along the transverse cutting line on the glass strip to generate microcracks of 0.1-0.3mm.

[0080] It should be noted that the set time is calculated manually based on the conveying speed of the glass belt 500 and the distance between the line scan camera 202 and the laser 304 (with some compensation based on experience). The control logic and signal transmission of the PLC controller are existing technologies and will not be elaborated here.

[0081] Furthermore, such as Figures 7-10 As shown, the horizontal bending mechanism 400 of this embodiment includes a mounting base 401 disposed at the rear end of the pre-cracking mechanism 300, a limiting plate 402 disposed on the mounting base 401, and multiple sets of lifting mechanisms arranged in a straight line slidably disposed on the limiting plate 402. A limiting mechanism is disposed above the glass strip 500 at the lifting position. By using multiple sets of lifting mechanisms to lift synchronously in the horizontal bending process, the initial crack is induced by the lifting mechanism in the middle cooperating with the limiting mechanism.

[0082] The lifting mechanism includes a movable base 403 that is slidably disposed on a limiting plate 402, an ejector cylinder 404 connected to the bottom of the movable base 403, and the other end of the ejector cylinder 404 connected to the mounting base 401. A lifting roller 405 is fixed on the movable base 403.

[0083] Furthermore, in this embodiment, taking the setting of three sets of lifting mechanisms as an example, an installation groove is provided on the top of the middle lifting roller 405, and a flexible boss 406 is fixed in the installation groove. The flexible boss 406 is made of elastic rubber material and can be fully squeezed into the installation groove under force. Before lifting, the three sets of lifting rollers 405 are horizontal, and the highest point of the flexible boss 406 is lower than the plane formed by the highest points of multiple sets of conveying rollers 102, and does not contact the bottom surface of the conveyed glass belt 500.

[0084] Furthermore, the limiting mechanism includes a connecting frame 407 installed on the top of the conveying brackets 101 on both sides. The connecting frame 407 is an integral structure. A limiting pressure roller 408 is rotatably provided on the connecting frame 407 for each lifting mechanism. The limiting pressure roller 408 cooperates with the corresponding lifting roller 405 to realize the action of lateral bending of the glass strip. The limiting pressure roller 408 can be made of rubber material, which has a slight elasticity during the lifting process to avoid the increase of compressive stress on the glass strip 500 caused by rigid limiting and damage to the glass.

[0085] Furthermore, the aforementioned connecting frame 407 can also be composed of a horizontal frame and a vertical frame, with the vertical frames on both sides fixed to the corresponding conveying brackets 101 (e.g., Figure 6 As shown, a telescopic rod 409 is installed inside the vertical frame. The head of the telescopic rod 409 is connected to both ends of the horizontal frame. The position of the limiting pressure roller 408 can be adjusted by driving the telescopic rod 409, so as to achieve the flexibility of horizontal bending limit.

[0086] The PLC controller, the laser 304, the line scan camera 202, and the prime number

[0087] After the laser 304 completes the pre-crack operation on the glass strip 500, when the pre-crack line 501 moves directly above the lifting mechanism, the PLC controller activates the ejector cylinder 404. The ejector cylinder 404 pushes the lifting roller 405 upwards. The middle lifting roller 405, through the flexible boss 406, preferentially contacts the bottom surface of the glass strip 500, pushing the glass strip 500 and inducing the initial crack along the pre-crack line 501 with the limiting pressure roller 408. Afterwards, the axial surfaces of all lifting rollers 405 are in contact with the bottom surface of the glass strip 500. Starting from the initial crack, the glass strip is broken laterally along the pre-crack line 501. After the glass strip 500 is broken, the lifting mechanism resets, and the conveyor line 100 continues to convey the glass for the next breaking process.

[0088] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0089] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0090] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A manufacturing process for 15-19mm thick borosilicate glass plates, characterized in that, Includes the following steps: Step 1: Raw material preparation: Weigh the raw materials stored in the raw material workshop and feed them into the mixing equipment for mixing to obtain a mixture. Step 2, Melting: The mixture is added to the melting furnace in a measured amount according to requirements. After high-temperature melting, clarification, homogenization, and cooling, it forms qualified glass liquid and flows into the liquid flow channel. Step 3, forming and annealing: The molten glass enters the tin bath from the flow channel. The molten glass spreads and expands naturally on the surface of the molten tin. It is then guided by mechanical pulling, edge blocking and edge pulling machine to form a glass strip (500) with a set width and thickness. It is then gradually cooled and enters the annealing furnace through the transition roller table for annealing and cooling. After cooling to the set temperature, it leaves the annealing furnace and enters the cold end unit. Multiple sets of edge-pulling machines are symmetrically arranged at both ends of the tin bath, with the first pair of edge-pulling machines on the side closest to the beginning of the tin bath being 7-9m away from the beginning of the tin bath. Step 4, Cold end processing: After the glass ribbon (500) enters the cold end unit, it goes through fully automatic defect monitoring, speed measurement, longitudinal cutting, transverse cutting, pre-cracking, transverse bending, separation, edge bending, and longitudinal splitting in sequence to form the original sheet; The pre-cracking process involves scanning along the transverse cutting line with a laser after the glass strip (500) is transversely cut to generate microcracks. The depth of the microcracks is 0.1-0.3 mm, which guides the transverse breaking direction. The horizontal bending process uses three sets of lifting mechanisms to lift synchronously, and the three sets of lifting mechanisms are arranged in a straight line perpendicular to the glass belt (500) conveying direction. The lifting mechanism in the middle induces the initial crack. The lifting mechanism includes a movable base (403) slidably mounted on a limiting plate, a lifting roller (405) fixed on the movable base (403), and a flexible boss (406) provided on the middle part of the lifting roller (405); a transverse cutting line will be generated on the transversely cut glass strip. The glass strip with the transverse cutting line is introduced from the input end of the conveyor line (100), and the glass edge is captured by the positioning mechanism (200), matched with the transverse cutting line, and the position is output to the pre-cracking mechanism (300). 300) Based on the position, start scanning along the transverse cutting line to generate a pre-crack line. The lifting roller (405) in the middle contacts the bottom surface of the glass strip first through the flexible boss (406). The lifting roller (408) moves the glass strip and induces the initial crack along the pre-crack line. After that, the axial surface of all lifting rollers (405) contacts the bottom surface of the glass strip. Starting from the initial crack, the glass strip is broken laterally along the pre-crack line. After the glass strip is broken, the lifting mechanism is reset and the conveyor line continues to convey the glass strip for the next breaking process.

2. A production equipment for 15-19mm thick borosilicate glass plates, characterized in that, It includes a conveyor line (100), and a positioning mechanism (200) and a pre-splitting mechanism (300) are sequentially arranged at the top of the input end of the conveyor line (100) along the conveying direction. The conveyor line (100) is provided with a horizontal bending mechanism (400), which is located at the rear end of the pre-crack mechanism (300) and performs a horizontal bending operation on the glass strip (500) after it has been processed by the pre-crack mechanism (300). The horizontal bending mechanism (400) includes a mounting base (401), a limiting plate (402) is provided on the mounting base (401), and multiple sets of lifting mechanisms arranged in a straight line are slidably provided on the limiting plate (402); a limiting mechanism is provided above the conveyor line (100); The lifting mechanism includes a movable base (403) slidably disposed on a limiting plate (402), a push-out cylinder (404) connected to the bottom of the movable base (403), and the other end of the push-out cylinder (404) connected to the mounting base (401); a lifting roller (405) is fixed on the movable base (403); and a flexible boss (406) is provided on the middle part of the lifting roller (405).

3. The production equipment for 15-19mm borosilicate glass ultra-thick plates according to claim 2, characterized in that, The conveyor line (100) includes conveyor supports (101) symmetrically arranged at both ends, and multiple sets of conveyor rollers (102) are rotatably arranged between the two conveyor supports (101). Multiple sets of the conveying rollers (102) convey the glass strip (500) along the conveying direction.

4. The production equipment for 15-19mm borosilicate glass ultra-thick plates according to claim 2, characterized in that, The positioning mechanism (200) includes a mounting bracket (201) disposed at the input end of the conveyor line (100), and a line scan camera (202) is disposed on one side of the mounting bracket (201).

5. The production equipment for 15-19mm borosilicate glass ultra-thick plates according to claim 2, characterized in that, The pre-splitting mechanism (300) includes fixed brackets (301) on both sides, and mounting base plates (302) are installed on the fixed brackets (301) on both sides. A linear module (303) is installed at the bottom of the mounting base plate (302), and a laser (304) is installed on the movable seat of the linear module (303). Pre-cracking is performed using the laser (304).

6. The production equipment for 15-19mm borosilicate glass ultra-thick plates according to claim 2, characterized in that, The limiting mechanism includes a connecting frame (407) installed on the top of the two side conveying brackets (101), and the connecting frame (407) is provided with a limiting pressure wheel (408) corresponding to the position of each lifting mechanism.

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