Plate edge thermal cutting process and device in the production of ultra-thin float glass

Abstract

The invention discloses a plate edge thermal cutting process and device in the production of ultra-thin float glass, relates to the technical field of ultra-thin float glass, solves the production drawbacks of float glass, and leads to the technical problem of low qualified rate of ultra-thin glass annealing and rear-end cutting finished products. The invention comprises the steps of 1: the glass plate after tin bath forming is pulled into the transition roller table equipment by the first transition roller of the transition roller table; 2: the glass plate pulled into the transition roller table equipment by the first transition roller is edge-trimmed by a cutting device before softening; 3: the edge and the middle of the glass plate after edge trimming are separated. 4: the separated glass plate is annealed in the annealing section and then enters the cold end for cutting and packaging. The invention is used to manufacture ultra-thin glass with a thickness of less than 1 mm, and has the advantages of high qualified rate of ultra-thin glass, good quality and no micro-scratches on the glass surface.

Description

Technical Field

[0001] The invention relates to an ultra-thin float glass produced by a float forming process, which can be used to manufacture ultra-thin glass with a thickness of less than 1 mm, and in particular to a plate edge thermal cutting process and a device thereof in the production of ultra-thin float glass. Background Art

[0002] The production process of traditional ultra-thin glass and ordinary glass is that the glass is first melted into glass water, which is then naturally thinned in a tin bath and then artificially stretched to form the edges. The formed glass plate is sent to a transition roller table, and finally the glass plate is lifted and sent to an annealing kiln, where it anneals the glass plate.

[0003] The existing ultra-thin float glass production lines basically follow the original ordinary float process production process. The production process is that the float glass is manufactured by suspending the glass liquid on the tin liquid, using the self-weight of the glass liquid and external molding methods to process the glass into plasticity, and then cooling and molding. When producing ultra-thin glass, factors such as the temperature distribution, viscosity distribution and force distribution of the glass liquid during molding are easy to cause ripples to form on the ultra-thin glass after molding, which seriously affects the quality of the ultra-thin glass.

[0004] The thickness of the edge of an ordinary glass plate is generally 5mm, and the middle of the finished product is basically greater than 1mm. The use of the above-mentioned process for traditional ordinary glass will not affect the shrinkage of the glass and the cutting of the edge of the glass plate, because the overall thickness of the glass is not much different. However, the thickness of the edge of the ultra-thin glass plate is generally 5mm, but the middle of the finished product is basically less than 1mm. The latest technology can produce 0.3mm glass. The thickness of the edge of the glass plate is naturally thinned by the glass liquid in the tin bath. Its thickness cannot be further significantly reduced due to the process. The difference between the thickness of the edge of the glass plate and the thickness of the middle of the glass is hundreds of times, resulting in a large difference in the temperature effect on the edge and the middle of the glass plate in the annealing furnace, and the shrinkage is different. The different shrinkage of the edge and the middle plate will lead to the inconsistency of the edge length and the middle. When conveying in the annealing furnace, the edge will produce lotus leaf warping, increasing the difficulty of the annealing process. In the annealing furnace and when conveying on the transition roller table, the glass plate and the conveying roller will slide, forming micro scratches on the lower surface, reducing the product qualification rate. Even if the glass plate leaves the annealing furnace, it still exists, which will cause the cold end cutting to not be completed well and the yield rate is low. Therefore, it is not advisable to use the manufacturing method of ordinary glass to manufacture ultra-thin glass. The thickness difference between the edge and the middle of the glass plate is too large, the edge cools slowly, and during annealing, the edge is longer than the middle ultra-thin glass plate, bending to form a lotus leaf edge. During annealing, the plate jumps and slides on the annealing roller, resulting in micro scratches under the plate. The cold end is difficult to trim, and the yield of cut glass plates is low. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of low qualified rate of finished products in annealing and subsequent cutting of ultra-thin glass caused by production drawbacks of traditional float glass, and to provide a plate edge thermal cutting process in the production of ultra-thin float glass.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] The plate edge thermal cutting process in the production of ultra-thin float glass is characterized by comprising the following steps:

[0008] Step S101: in the tin bath, the thinned shaped glass sheet is lifted by the first transition roller of the transition roller table and then sent to the transition roller table;

[0009] Step S102: The rotation of the driving roller of the transition roller table drives the formed glass sheet to move toward the rear section. The temperature of the formed glass sheet gradually decreases after being conveyed by the two driving rollers, and the formed glass sheet gradually begins to harden.

[0010] Step S103: the liquid-cooled cutting device comprises two cutting units that rotate in opposite directions, the two cutting units are separated, and there is a large distance between the two cutting units. The liquid-cooled cutting device is inserted into the transition roller stage from the left and right sides of the transition roller stage;

[0011] Step S104: after the liquid-cooled cutting device is inserted into the interior of the transition roller table, the two cutting units are further inserted so that the formed glass sheet is located between the two cutting units;

[0012] Step S105: the two cutting units of the liquid-cooled cutting device are retracted toward the formed glass plate, and the cutting knives on the two cutting units cut the formed glass plate;

[0013] Step S106: the cut edge of the glass sheet and the middle of the glass sheet enter an annealing furnace adjacent to the transition roller table together; the glass sheet moves forward under the action of the annealing furnace drive rollers in the annealing furnace, and the number of the annealing furnace drive rollers is composed of multiple rollers, and the temperature of the middle of the cut glass sheet is gradually reduced during the movement;

[0014] Step S107: After the temperature of the middle part of the glass plate drops to room temperature and exits the annealing furnace, the separated middle part of the glass plate is cold-end cut and packaged.

[0015] To further illustrate, in step S103, when the linear speed of the cutting blades on the two cutting units is equal to or greater than the linear speed of the formed glass plate moving in the production line direction, they move relative to each other, and the two cutting blades form a pair of relatively rotating cutting blades to cut and separate the formed glass plate.

[0016] Further explanation: in step S103, the cutting unit has a cooling liquid inlet and outlet pipeline system, and the cooling liquid inlet and outlet pipeline system has cooling liquid to take away the heat of the cutting knife on the cutting unit.

[0017] Further explanation: in step S104, the thickness difference between the edge and the middle of the glass plate is large, the edge and the middle of the glass plate have been separated, and during the annealing process, only the process adjustment is performed on the middle of the glass plate.

[0018] To further illustrate, in step S103, a pad is placed above the driving roller, the shaped glass plate is placed on the pad, a cutting knife is placed above the shaped glass plate, and the shaped glass plate is cut directly on the driving roller with the cutting knife.

[0019] To further illustrate, step S104 is replaced by: after the liquid-cooled cutting device is inserted into the interior of the annealing furnace, the two cutting units are further inserted so that the shaped glass sheet is located between the two cutting units.

[0020] To further illustrate, there are two cutting knives arranged in upper and lower positions, and the two cutting knives arranged in upper and lower positions form a shearing cooperation mode to cut the shaped glass plate.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention separates the edge and the middle of the glass plate by a liquid-cooled cutting device before the glass plate on the transition roller is softened, and the transition roller sends the middle of the glass plate into an annealing furnace, and the annealing furnace anneals the middle of the glass plate. The edge and the middle of the glass plate are separated before the glass plate is hardened, thereby reducing the difficulty of the manufacturing process of ultra-thin glass, that is, the thickness of the middle of the glass plate can be less than 1 mm, preferably 0.3 mm, and solving the production drawbacks of traditional float glass, which leads to the problem of low qualified rate of ultra-thin glass annealing and subsequent cutting.

[0023] 2. Before the molded glass plate of the present invention is softened, the edge of the glass plate and the middle of the glass plate are separated by a trimming machine, and the thickness difference between the edge of the glass plate and the thickness of the middle of the glass plate is hundreds of times, which avoids the edge and the middle of the glass plate being annealed together in the annealing furnace and being greatly affected by the temperature and shrinking differently.

[0024] 3. The edge and the middle of the glass plate are separated by a cutting knife before the glass plate is softened, so as to avoid hardening of the edge and the middle of the glass plate before annealing, and avoid different shrinkage of the glass plate, resulting in inconsistent length of the edge and the middle of the glass plate. When conveyed in the annealing furnace, the edge will produce lotus leaf warping, which increases the difficulty of the annealing process.

[0025] 4. The present invention avoids the shrinkage of the edge and middle of the glass plate before annealing, and the shrinkage is different, resulting in inconsistency between the edge length and the middle. When the glass plate is transported in the annealing furnace and on the transition roller table, it is prevented from sliding friction due to shrinkage when it is transmitted on the transition roller table, and micro scratches are formed on the lower surface of the glass plate, thereby improving the qualified rate of the product.

[0026] 5. The cutting unit of the present invention has a cooling liquid inlet and outlet pipe system, and the cooling liquid in and out of the cooling liquid inlet and outlet pipe system is used to take away the heat of the cutting knife on the cutting unit, so as to avoid the cutting knife sticking when cutting the glass plate before the glass plate softens. Compared with the cold cutting of traditional glass, the present invention can complete the cutting well without sticking, and has a high yield rate.

[0027] 6. In the present invention, when the rotational linear speed of the two cutting knives on the cutting unit is equal to or greater than the linear speed of the formed glass plate moving in the production line direction, the two cutting knives make relative motion, and the two cutting knives form a pair of relatively rotating cutting knives to cut and separate the formed glass plate.

[0028] 7. The front end of the guide rail of the present invention is connected with a rotating head, so that the cutting knife rotates relative to the rotating head, and the cutting knife forms an angle β° with the moving direction of the glass plate. The range of the angle β° is between 0-15°, so that the cutting knife can separate the middle and edge glass of the glass plate during the glass plate cutting process, and prevent the edge and middle of the glass plate from sticking together again after cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the production process of float glass in the prior art;

[0030] Figure 2 It is a schematic diagram of the production process of float glass of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the production line device of the present invention;

[0032] Figure 4 is a three-dimensional schematic diagram of a glass plate of the present invention being cut;

[0033] Figure 5 is a schematic diagram of a liquid-cooled cutting device of the present invention;

[0034] Figure 6 is a schematic diagram of the main viewing direction of the glass plate of the present invention being cut;

[0035] Figure 7 It is a schematic diagram of the glass plate structure of the present invention.

[0036] Figure 8It is a schematic diagram of the angle formed when the cutting knife separates the edge and the middle of the glass plate during the cutting process of the glass plate of the present invention.

[0037] Figure markings: 1-annealing kiln drive roller, 2-liquid-cooled cutting device, 21-cutting knife, 22-guide rail, 23-frame, 24-motor, 25-transmission device, 26-rotating joint, 27-adjusting handle, 28-bearing seat, 29-rotating machine rod, 3-drive roller, 30-rotating machine rod outer tube, 31-gear, 4-first transition roller, 5-tin bath, 6-molded glass plate, 61-edge of glass plate, 62-middle of glass plate, 7-transition roller table, 8-annealing kiln. DETAILED DESCRIPTION

[0038] In order to better understand the present invention for the personnel of the technical field, the present invention is further described in detail in the following examples. It should be noted that the "front", "back", "up", "down", "inside", "outside", "right" and "left" mentioned in the specific embodiment are only used to identify the various elements oriented in the accompanying drawings. These terms are not meant to limit the elements described therein, because the various elements can be oriented differently in different implementations, and the main viewing direction described in the present invention is the direction from the tin bath to the annealing furnace production line. Example 1

[0039] like Figure 1 As shown in the above background technology, the production process of traditional ultra-thin float glass has the following steps:

[0040] Step 1: Mix quartz sand powder and sodium carbonate powder evenly, heat at high temperature, smelt into glass water and then add calcium carbonate;

[0041] Step 2: Pour liquid glass water onto the tin liquid surface in the tin bath and naturally dilute it. After cooling, the glass water becomes a glass plate. The edge of the glass plate is pulled outward by a side-pulling machine or the middle of the glass plate itself forms an outward expansion tension, making the middle of the glass plate thinner and the edge of the glass plate thicker.

[0042] Step 3: After being formed in the tin bath, the glass sheet is first sent to the annealing kiln for annealing via a transition roller table, and then the annealed glass sheet is taken out of the annealing kiln.

[0043] Step 4: The glass plate is directly trimmed by a trimming machine (the glass plate may have been cooled and hardened before trimming), and the edge and middle of the glass plate are separated after trimming;

[0044] Step 5: After edge trimming, the glass sheet is then cold-cut in the middle and stacked for packaging. Example 2

[0045] like Figure 4 , 5As shown, the shaped glass plate 6 is divided into a glass plate edge 61 and a glass plate middle 62 (the glass plate after trimming), the thickness of the glass plate edge 61 is within 5 mm, the thickness of the glass plate middle 62 is below 1 mm, and the thickness of the glass plate middle 62 is 0.3 mm. The present invention mainly cuts the glass plate 6 by separating the glass plate edge 61 and the glass plate middle 62.

[0046] like Figure 2 As shown, this embodiment is a preferred embodiment, which provides a plate edge thermal cutting process in the production of ultra-thin float glass, including the following steps:

[0047] Step S101: in the tin bath 5, the thinned shaped glass plate 6 is lifted by the first transition roller 4 of the transition roller table 7 and then sent to the transition roller table 7;

[0048] Step S102: The rotation of the driving roller 3 of the transition roller table 7 drives the shaped glass plate 6 to move to the rear section. The temperature of the shaped glass plate 6 gradually decreases after being conveyed by the two driving rollers 3, and the shaped glass plate 6 gradually begins to harden.

[0049] Step S103: the liquid-cooled cutting device 2 is composed of two cutting units that rotate in opposite directions, the two cutting units are separated, and there is a large distance between the two cutting units. The liquid-cooled cutting device 2 is inserted into the transition roller stage 7 from the left and right sides of the transition roller stage 7;

[0050] Step S104: After the liquid-cooled cutting device 2 is inserted into the interior of the transition roller table 7, the two cutting units are further inserted so that the formed glass plate 6 is located between the two cutting units;

[0051] Step S105: the two cutting units of the liquid-cooled cutting device 2 are retracted toward the shaped glass plate 6, and the cutting knives 21 on the two cutting units cut the shaped glass plate 6;

[0052] Step S106: the cut glass plate edge 61 and the glass plate middle 62 enter the annealing furnace 8 adjacent to the transition roller table 7 together; the glass plate edge 61 and the glass plate middle 62 move forward under the action of the annealing furnace drive roller 1 in the annealing furnace 8, and the number of the annealing furnace drive rollers 1 is composed of multiple rollers, and the cut glass plate middle 62 gradually reduces the temperature of the glass plate middle 62 during the movement;

[0053] Step S107: After the temperature of the middle portion 62 of the glass plate drops to room temperature and exits the annealing furnace 8, the separated middle portion 62 of the glass plate is cold-end cut and packaged.

[0054] To further illustrate, in step S103, when the linear speed of the blades of the two cutting knives 21 on the cutting units is equal to or greater than the linear speed of the formed glass plate 6 moving in the production line direction, they move relative to each other, and the two cutting knives 21 form a pair of relatively rotating cutting knives to cut and separate the formed glass plate 6.

[0055] Further explanation: in step S103, the cutting unit has a cooling liquid inlet and outlet pipeline system, and the cooling liquid inlet and outlet pipeline system has cooling liquid to take away the heat of the cutting knife 21 on the cutting unit.

[0056] Further explanation: in step S104, the thickness difference between the edge 61 and the middle 62 of the glass plate is large, and the edge 61 and the middle 62 of the glass plate have been separated. During the annealing process, only the middle 62 of the glass plate is processed.

[0057] To further illustrate, in step S103 , a pad is placed above the driving roller 3 , the shaped glass plate 6 is placed on the pad, a cutting knife is placed above the shaped glass plate 6 , and the shaped glass plate 6 is cut directly on the driving roller 3 with the cutting knife 21 .

[0058] To further illustrate, step S104 is replaced by: after the liquid-cooled cutting device 2 is inserted into the interior of the annealing furnace 8, the two cutting units are further inserted so that the shaped glass plate 6 is located between the two cutting units.

[0059] Further, the cutting blade 21 forms an angle β° with the moving direction of the glass plate 6 , and the angle β° is in the range of 0-15°. Example 3

[0060] like Figure 3-4 As shown, this embodiment provides a plate edge thermal cutting process device in the production of ultra-thin float glass, including a liquid-cooled cutting device 2, a tin bath 5, a transition roller table 7 and an annealing furnace 8, wherein the transition roller table 7 has a first transition roller 4, a drive roller 3 and an annealing furnace 8 has an annealing furnace drive roller 1 (the number of annealing furnace drive rollers 1 is multiple), the annealing furnace 8 is located at the front side of the transition roller table 7, the tin bath 5 is located at the rear side of the transition roller table 7, and the left and right sides of the transition roller table 7 or the left and right sides of the annealing furnace 8 are respectively hung with liquid-cooled cutting devices 2 (not specifically shown in the figure), the liquid-cooled cutting device 2 is connected or hung on a hanger or a slide rail (not shown in the figure), the liquid-cooled cutting device 2 has a cutting knife 21, the liquid-cooled cutting device 2 moves toward the direction of the annealing furnace 8 or moves in the opposite direction, or the cart pushes the liquid-cooled cutting device 2 to move, and the liquid-cooled cutting device 2 can move up and down through the hanger or the slide rail, and the liquid-cooled cutting device 2 can also move left and right on the slide rail, such as Figure 3 , 4As shown, the liquid-cooled cutting device 2 is inserted from the left and right sides of the transition roller table 7. The liquid-cooled cutting device 2 on both sides of the transition roller table 7 is composed of two cutting units that rotate in opposite directions (equivalent to the combination of the rotating joint 26, the rotating machine rod 29 and the cutting knife 21 arranged above and below).

[0061] like Figure 5 As shown, the liquid-cooled cutting device 2 comprises a cutting blade 21, a guide rail 22, a frame 23, a motor 24, a transmission device 25, a rotary joint 26, an adjustment handle 27, a bearing seat 28, a rotary machine rod 29 and a gear 31. The motor 24 and the transmission device 25 are fixed on the frame 23, and the frame 23 is slidably connected to the guide rail 22. A rotary head (not shown in the figure) is connected to the front end of the guide rail 22 so that the cutting blade 21 rotates relative to the rotary head. Figure 5 As shown, the cutting knife 21 forms an angle β° with the movement direction of the glass plate 6, the liquid-cooled cutting device 2 has a rotary joint 26 and a rotating machine rod 29, the rotating machine rod 29 has a rotating machine rod outer tube 30, the transmission device 25 is movably connected to the rotating machine rod 29 through a bearing seat 28, one end of the rotating machine rod outer tube 30 is sealed with the rotary joint 26, and the other end of the rotating machine rod outer tube 30 is locked with the cutting knife 21. After the cooling liquid is passed into the rotary joint 26, the cooling liquid cools the cutting knife 21, and the cooling liquid takes away the heat of the cutting knife 21 to cool the cutting knife 21.

[0062] like Figure 5 , 6 As shown, there are two rotating machine rods 29 arranged in an upper and lower position. The rotating machine rod 29 is provided with a gear 31, and the gear 31 is meshed with the gear on the transmission device 25. The two rotating machine rods 29 make relative rotational motion through the gear 31. The two rotating machine rods 29 are closed or separated by the action of the adjusting handle 27. The transmission device 25 has an adjusting handle 27, which is located below the transmission device 25 and is connected to the bearing seat 7 by means of a screw and a nut.

[0063] The frame 23 is slidably connected to the guide rail 22, and the frame 23 is connected or hung on a mobile device, which can be a cart, a crane or a hanger. The mobile device drives the frame 23 to move up and down or forward and backward or left and right, and the liquid-cooled cutting device 2 can also slide left and right on the frame 23.

[0064] The number of the cutting knives 21 is two and they are arranged at the upper and lower parts so that the two cutting knives 21 arranged at the upper and lower parts form a shearing fit. The gear 31 is rotated by the action of the transmission device 25 driven by the motor 24. At the same time, the rotating machine rod outer tubes 30 arranged at the upper and lower parts perform relative rotational motion so that the two cutting knives 21 arranged at the upper and lower parts perform rotational motion. Example 4

[0065] The difference from Example 2 is that the liquid-cooled cutting device 2 is inserted from the left and right sides of the annealing furnace 8, and the liquid-cooled cutting device 2 on both sides of the annealing furnace 8 is composed of two cutting units that rotate in opposite directions. The cutting knives 21 on the two cutting units cut the formed glass plate 6 in the annealing furnace 8, and the annealing furnace drive roller 1 drives the formed glass plate 6 to move forward. Because the formed glass plate 6 has a temperature in the annealing furnace 8, the formed glass plate 6 is not completely cooled and is in a softened state, so the cutting of the formed glass plate 6 in the annealing furnace 8 is the last extreme process cutting. Example 5

[0066] The main difference between the preferred embodiment 1 of the present invention and the traditional ultra-thin float glass production process is that: in the traditional float glass production process, the glass plate formed in the tin bath can also be sent to an annealing furnace for annealing, and then the annealed formed glass plate is taken out of the annealing furnace, and the formed glass plate is directly trimmed by a cutting device (the glass plate may have been cooled and hardened before this trimming), and the edge and middle of the glass plate are separated after trimming.

[0067] The present invention is as follows: the glass plate formed in the tin bath is first sent to an annealing furnace for annealing through a transition roller table, and then the annealed glass plate is taken out from the annealing furnace, and the formed glass plate is pulled into the transition roller table by the first transition roller on the transition roller table, and the formed glass plate pulled into the transition roller table equipment by the first transition roller is trimmed by a liquid-cooled cutting device or the final extreme position is trimmed in the annealing furnace, and the edge and middle of the glass plate are separated after trimming (before this trimming, the glass plate is always in a softened state to prevent the glass plate from hardening), and the separated glass plate passes through the transition roller of the transition roller table and then the middle of the glass plate is sent to the annealing furnace, and the annealing furnace anneals the middle of the glass plate.

[0068] The main innovation of the present invention is that before the glass plate on the tin bath is sent into the annealing furnace through the transition roller table, the edge of the glass plate (the naturally thinned part) and the middle of the glass plate (the middle of the glass plate is thinned by the outward expansion tension formed by the drawing machine to draw the forming part or the middle of the glass plate itself) are separated by a cutting knife before the glass plate softens. In addition, when the liquid-cooled cutting device cuts the glass plate, the glass plate is in a softened state (has a certain temperature), and the cutting unit on the liquid-cooled cutting device also has a cooling liquid to cool the cutting knife, so the cutting knife will not stick to the glass plate.

[0069] The two annealing processes only concern the transmission and annealing of ultra-thin glass (the middle part of the glass plate), which reduces the difficulty of the annealing process of ultra-thin glass, improves the yield rate of cold section cutting (possibly trimming the glass plate or improving the dimensional accuracy of the glass plate), reduces micro scratches, and improves the qualified rate of finished products.

[0070] The separated edges of the glass sheets can enter the annealing furnace together with the middle of the glass sheets and be transferred to the cold end for processing.

[0071] The separated glass sheet edges can also be transferred to a cullet handling system by other transfer mechanisms before annealing (the best way, because it is possible that the glass sheet edges and the middle are bonded together again during the annealing process).

[0072] Therefore, the technical solution of the float process for producing ultra-thin glass of the present invention has overcome the traditional technical difficulties in particular; the unexpected technical progress effect produced by this technical solution is not obvious to people in the industry; the present invention discloses a new technical solution for the float process for producing ultra-thin glass that has never been disclosed or revealed by the prior art, and produces unexpected technical effects, which are not the kind of results that can be derived by simple logical reasoning or simple experiments after the fact; they are all solutions to technical problems that people have been eager to solve but have not solved; the unexpected effects have produced changes in "quality" and "quantity", and the solution of the present invention is not obvious, and has outstanding substantive characteristics and significant technical progress.

[0073] The above description is only a preferred embodiment of the float process for producing ultra-thin glass of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. The plate edge thermal cutting process in the production of ultra-thin float glass is characterized by: The steps include: Step S101: in a tin bath (5), a thinned shaped glass plate (6) is lifted by a first transition roller (4) of a transition roller table (7) and then sent to the transition roller table (7); Step S102: the rotation of the driving roller (3) of the transition roller table (7) drives the shaped glass plate (6) to move toward the rear section, and the temperature of the shaped glass plate (6) gradually decreases after being conveyed by the two driving rollers (3), and the shaped glass plate (6) also gradually begins to harden; Step S103: the liquid-cooled cutting device (2) comprises two cutting units that rotate in opposite directions, the two cutting units are separated, and there is a large distance between the two cutting units. The liquid-cooled cutting device (2) is inserted into the transition roller table (7) from the left and right sides of the transition roller table (7); Step S104: after the liquid-cooled cutting device (2) is inserted into the interior of the transition roller table (7), the two cutting units are further inserted so that the shaped glass plate (6) is located between the two cutting units; Step S105: the two cutting units of the liquid-cooled cutting device (2) are retracted toward the shaped glass plate (6), and the cutting knives (21) on the two cutting units cut the shaped glass plate (6); Step S106: the cut edge portion (61) and the middle portion (62) of the glass plate enter an annealing furnace (8) adjacent to the transition roller table (7) together; the glass plate moves forward under the action of the annealing furnace drive roller (1) in the annealing furnace (8), wherein the number of the annealing furnace drive rollers (1) is composed of a plurality of rollers, and the temperature of the middle portion (62) of the glass plate is gradually reduced during the movement of the cut edge portion (61) of the glass plate; Step S107: After the temperature of the middle part (62) of the glass plate drops to room temperature and exits the annealing furnace (8), the separated middle part (62) of the glass plate is cold-end cut and packaged.

2. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: In step S103, when the linear speed of the blades of the two cutting knives (21) on the cutting units is equal to or greater than the linear speed of the shaped glass plate (6) moving in the production line direction, the two cutting knives (21) move relative to each other, forming a pair of relatively rotating cutting knives to cut and separate the shaped glass plate (6).

3. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: In step S103, the cutting unit has a cooling liquid inlet and outlet pipeline system, and the cooling liquid inlet and outlet pipeline system has cooling liquid to take away the heat of the cutting knife (21) on the cutting unit.

4. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: In step S104, the thickness difference between the edge (61) and the middle (62) of the glass plate is large, and the edge (61) and the middle (62) of the glass plate have been separated. During the annealing process, only the middle (62) of the glass plate is subjected to process adjustment.

5. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: In step S103, a pad is placed above the driving roller (3), the shaped glass plate (6) is placed on the pad, a cutting knife is placed above the shaped glass plate (6), and the shaped glass plate (6) is cut directly on the driving roller (3) using the cutting knife (21).

6. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: Step S104 is replaced by: after the liquid-cooled cutting device (2) is inserted into the interior of the annealing furnace (8), the two cutting units are further inserted so that the shaped glass plate (6) is located between the two cutting units.

7. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: There are two cutting knives (21) arranged in an upper and lower position, and the two cutting knives (21) arranged in an upper and lower position form a shearing cooperation mode to cut the shaped glass plate (6).

8. The plate edge thermal cutting process in the production of ultra-thin float glass according to claim 1, characterized in that: The cutting blade (21) forms an angle β° with the movement direction of the formed glass plate (6), and the range of the angle β° is between 0° and 15°.

Images