Heating device and method for substrate glass production

Abstract

The invention relates to the technical field of substrate glass manufacturing, in particular to a heating device and method for substrate glass production. The heating device for substrate glass production comprises a heating furnace plate and a plurality of heating pieces, a plurality of groove bodies are formed in the side, close to a glass plate, of the heating furnace plate, the groove bodies are arranged in an array mode in the height direction of the heating furnace plate, and the groove bodies penetrate through the heating furnace plate in the length direction of the heating furnace plate; the heating piece comprises a fixing rod and a heating wire, and the fixing rod is arranged in the groove body in the length direction of the groove body and fixedly installed with the heating furnace plate; the heating wire is wound on the peripheral surface of the fixing rod in the length direction of the fixing rod, and the outer diameter of the heating wire is larger than the height of the groove body; a high-reflection layer is arranged on the inner side face of the groove body, and a certain distance is reserved between the high-reflection layer and the outer diameter of the heating wire. The heating device can be safely and reliably used for a long time, and the production stability is improved; and meanwhile, the product quality and the heating efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of substrate glass manufacturing, and in particular to a heating device and method for producing substrate glass. Background Art

[0002] Substrate glass is one of the key materials for flat panel display devices and is also the carrier of panel manufacturing process. During use, its flatness and thermal stability are required to be high. Especially with the development of high-generation and high-precision display technology, the performance requirements for substrate glass are getting higher and higher. Overflow method substrate glass occupies an important market position due to its characteristics of surface quality without secondary processing, but its process control technology is extremely difficult. When the molten glass overflows and merges at the tip of the brick, then, a reasonable temperature field distribution is required during the glass descent process to achieve quality control. Therefore, it is necessary to set a heating device on both sides of the glass plate to compensate for the temperature difference of the glass plate cooling. Due to structural defects, the radiation area of ​​the heating wire in the traditional heating device is small during the heating radiation process, resulting in incomplete heating of the glass plate when heating the glass plate, thereby affecting the quality of the product and low heating efficiency; at the same time, there is a phenomenon and risk of heating wire melting and falling off in long-term production, poor safety performance, and a certain impact on production stability and product quality. Summary of the invention

[0003] The object of the present invention is to provide a heating device for producing substrate glass, so as to solve the problem in the prior art that the heating device has a small heating radiation area of ​​the heating wire and the heating wire is melted, resulting in poor product quality and poor production safety performance.

[0004] In order to solve the above problems, the present invention proposes a heating device for substrate glass production, and the technical solution adopted is: A heating device for producing substrate glass comprises: a heating furnace plate and a plurality of heating elements, wherein a plurality of slots are arranged on a side of the heating furnace plate close to a glass plate, the plurality of slots are arranged in an array along a height direction of the heating furnace plate, and the slots penetrate the heating furnace plate along a length direction of the heating furnace plate, and the heating elements are arranged in the slots along a length direction of the slots; the heating elements comprise a fixing rod and a heating wire, the fixing rod is arranged in the slots along a length direction of the slots, and is fixedly mounted to the heating furnace plate; the heating wire is wound around an outer peripheral surface of the fixing rod along a length direction of the fixing rod, and in a thickness direction of the heating furnace plate, an outer diameter of the heating wire is greater than a height of the slots; a high reflection layer is arranged on an inner side surface of the slots, and a certain distance is arranged between the high reflection layer and an outer diameter of the heating wire.

[0005] Furthermore, the thickness of the high reflective layer is 1-1.2 mm.

[0006] Furthermore, the distance between the high reflective layer and the outer diameter of the heating wire is greater than or equal to 5 mm.

[0007] Furthermore, in the length direction of the heating furnace plate, pressure strips are arranged at both sides of the heating furnace plate, and the pressure strips are arranged along the height direction of the heating furnace plate, and both ends of the fixing rod are fixedly connected to the pressure strips.

[0008] Furthermore, the trough bodies are arranged at equal intervals along the height direction of the heating furnace plate, so that the heating elements are arranged at equal intervals along the height direction of the heating furnace plate.

[0009] Furthermore, the structure of the heating wire is a circular spiral structure wound around the outer circumference of the fixing rod.

[0010] Furthermore, the ratio of the diameter of the fixing rod to the inner diameter of the heating wire is (0.8-0.9):1.

[0011] Furthermore, the ratio of the height of the wire groove to the outer diameter of the heating wire is less than 0.5.

[0012] Furthermore, the cross-section of the groove body is configured as a semicircle whose shape matches the shape of the heating wire.

[0013] The present invention also proposes a heating method for substrate glass production, based on the above-mentioned substrate glass production heating device, comprising the following steps: S1, a plurality of slots are provided on the side of the heating furnace plate close to the glass plate and arranged in an array along the height direction of the heating furnace plate; S2, winding the heating wire around the outer circumference of the fixing rod along the length direction of the fixing rod to form a heating element, and setting the heating element in the trough body along the length direction of the trough body to form a fixed installation with the heating furnace plate, and in the thickness direction of the heating furnace plate, the outer diameter of the heating wire is greater than the height of the trough body; S3, placing the heating furnace plates on both sides of the glass plate, and placing the side with the heating element close to the glass plate; S4, the heating wire is energized to achieve heating treatment of the glass plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention is an improved invention. The present invention arranges a fixing rod fixedly mounted on the heating furnace plate, and winds the heating wire on the outer peripheral surface of the fixing rod along the length direction of the fixing rod, so that the heating wire is connected to the heating furnace plate through the fixing rod, the installation is convenient, and the heating device can be used safely and reliably for a long time, thereby solving the problem of the heating wire fusing and falling off and the risk in the heating device of the prior art during long-term production, and improving the production stability and product quality; at the same time, in the thickness direction of the heating furnace plate, the outer diameter of the heating wire is greater than the height of the groove body on the heating furnace plate, so that the radiation angle of the heating wire relative to the glass plate is greater than 120° when it is used, and the glass plate is completely heated when it is heated, thereby improving the product quality and the heating efficiency; furthermore, a high reflection layer is arranged on the inner side surface of the groove body, and a certain distance is arranged between the high reflection layer and the outer diameter of the heating wire, so that the heating wire does not directly contact the heating furnace plate, thereby ensuring good reflection and heat dissipation effects.

[0015] The thickness of the high reflective layer is 1-1.2 mm, which further improves the reflection and heat dissipation effects.

[0016] The distance between the high reflective layer and the outer diameter of the heating wire is greater than or equal to 5 mm, which further improves the reflection and heat dissipation effects.

[0017] The trough bodies are arranged at equal intervals along the height direction of the heating furnace plate, so that the heating elements are arranged at equal intervals along the height direction of the heating furnace plate, thereby ensuring uniform heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a heating device for producing substrate glass in the prior art; Figure 2 It is a schematic structural diagram of a local heating unit in a heating device for producing substrate glass in the prior art; Figure 3 It is a schematic diagram of the structure of fixed wire ablation in a heating device for substrate glass production in the prior art; Figure 4 It is a schematic structural perspective view of a heating device for producing substrate glass according to the present invention; Figure 5 It is a structural front view of the heating device for producing substrate glass of the present invention; Figure 6 It is a structural schematic diagram of a local heating unit of a heating device for producing substrate glass of the present invention; In the figure, 1, glass plate, 2, heat radiation zone, 3, existing heating device, 31, fixed furnace plate, 32, spring-shaped wire, 33, metal fixed wire, 34, ablation, 35, outer diameter of the spring-shaped wire, 4, new heating device, 41, heating furnace plate, 42, heating wire, 43, fixing rod, 44, pressure strip, 45, screw, 46, high reflective layer. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0020] As cited in the background art, the heating device in the prior art has poor product quality and poor safety performance due to the small heating radiation area of ​​the heating wire and the melting of the heating wire. Figure 1 , 2 As shown in Figure 3, the existing heating device 3 is distributed on both sides of the glass plate 1, and heating and temperature compensation are performed according to the actual temperature difference of the glass plate 1. The existing heating device 3 includes a fixed furnace plate 31, a heating wire and a metal fixed wire 33; when in use, the heated wire is in the shape of a spring, that is, a spring-shaped wire 32, which is placed in the corresponding wire groove of the fixed furnace plate 31 and fixed by the metal fixed wire 33. When the spring-shaped wire 32 is powered on and heated, the heating device placed on both sides of the glass plate 1 heats the glass plate 1 in the corresponding area through the heat radiation area 2. However, in the existing heating device 3, since the spring-shaped wire 32 is directly placed in the wire groove as a whole and contacts the bottom of the groove; at the same time, the groove height H1 of the wire groove is greater than the outer diameter 35 of the spring-shaped wire, resulting in the heating radiation angle of the spring-shaped wire 32 being within 90° and the radiation area being small; in addition, during the power-on heating process, the spring-shaped wire 32 will be heated and expanded and deformed, part of the spring-shaped wire 32 will fall out of the wire groove, or the metal fixed wire 33 will be loosened and ignited and melted, and the metal fixed wire 33 will be ablated 34 due to long-term high temperature.

[0021] Therefore, based on the above reasons, the present invention provides a heating device for substrate glass production, including a heating furnace plate 41 and a plurality of heating elements, the heating furnace plate 41 is used to install the heating elements, and the heating elements are used to heat the glass plate 1; a plurality of slots are provided on the side of the heating furnace plate 41 close to the glass plate 1, and the plurality of slots are arranged in an array along the height direction of the heating furnace plate 41, and the slots penetrate the heating furnace plate 41 along the length direction of the heating furnace plate 41, and the heating elements are arranged in the slots along the length direction of the slots for accommodating the heating elements; the heating elements include a fixing rod 43 and a heating wire 42, the fixing rod 43 is arranged in the slots along the length direction of the slots, and is fixedly installed with the heating furnace plate 41, and is used to fix the heating wire 42 on the heating furnace plate 41, the heating wire 42 will not fall out of the groove body, ensuring safety, reliability and stability in production; the heating wire 42 is wound around the outer circumference of the fixing rod 43 along the length direction of the fixing rod 43, and in the thickness direction of the heating furnace plate 41, the outer diameter of the heating wire 42 is greater than the height of the groove body, so that the radiation angle of the heating wire 42 relative to the glass plate 1 is greater than 120°, and the glass plate 1 is completely heated when heating the glass plate 1, thereby improving the quality of the product and the heating efficiency; in addition, a high reflection layer is provided on the inner side surface of the groove body, and a certain distance is provided between the high reflection layer 46 and the outer diameter of the heating wire 42, so that the heating wire 42 does not directly contact the heating furnace plate 41, which can ensure good reflection and heat dissipation effects.

[0022] Specific embodiment 1 of the heating device for producing substrate glass of the present invention: In this embodiment, Figure 4 , 5As shown in , 6, a heating device for substrate glass production is a new type of heating device 4, comprising a heating furnace plate 41 and a plurality of heating elements. A plurality of slots are provided on the side of the heating furnace plate 41 close to the glass plate 1, and the plurality of slots are arranged in an array along the height direction of the heating furnace plate 41, and the slots penetrate the heating furnace plate 41 along the length direction of the heating furnace plate 41, and the heating elements are arranged in the slots along the length direction of the slots; the heating elements comprise a fixing rod 43 and a heating wire 42, the fixing rod 43 is arranged in the slots along the length direction of the slots, and is fixedly installed with the heating furnace plate 41, wherein the fixing rod 43 is suitable for fixing and installing the heating wire 42, and the material thereof is a refractory material with high temperature resistance; the heating wire 42 is wound on the outer peripheral surface of the fixing rod 43 along the length direction of the fixing rod 43, and in the thickness direction of the heating furnace plate 41, the outer diameter of the heating wire 42 is greater than the height H2 of the slots. When in use, after the heating wire 42 is powered on for heating, the radiation angle a of the heating wire 42 relative to the glass plate 1 is greater than 120°, and the heating wire 42 is stably mounted on the fixing rod 43. A high-reflection layer 46 is provided on the inner side of the groove body, and a certain distance is provided between the high-reflection layer 46 and the outer diameter of the heating wire 42, so that the heating wire 42 does not directly contact the heating furnace plate 41, and a good reflection and heat dissipation effect can be ensured. When the heating wire 42 is powered on for heating, the glass plate 1 area is heated by the heat reflection of the high-reflection layer 46 and the heat radiation of the leaking part. At the same time, the heating wire 42 does not directly contact the heating furnace plate 41, and it does not need to be fixed with other metal materials, which ensures good insulation and heat dissipation in the power-on state, and can be used safely for a long time. Among them, the thickness of the high-reflection layer 46 is 1-1.2mm, and the distance between the high-reflection layer 46 and the outer diameter of the heating wire 42 is greater than or equal to 5mm. Specifically, the thickness of the high-reflection layer 46 is 1mm, and the distance between the high-reflection layer 46 and the outer diameter of the heating wire 42 is 5mm.

[0023] In other embodiments, the thickness of the high reflective layer 46 is 1.2 mm, and the distance between the high reflective layer 46 and the outer diameter of the heating wire 42 is 7 mm.

[0024] In this embodiment, the structure of the heating wire 42 is a circular spiral structure wound on the outer circumference of the fixed rod 43, and the cross-section of the groove body is a semicircular shape that matches the shape of the heating wire 42; the ratio of the diameter of the fixed rod 43 to the inner diameter of the heating wire 42 is (0.8~0.9):1; the ratio of the height H2 of the wire groove to the outer diameter of the heating wire 42 is less than 0.5. Specifically, the ratio of the diameter of the fixed rod 43 to the inner diameter of the heating wire 42 is 0.8:1; the ratio of the height H2 of the wire groove to the outer diameter of the heating wire 42 is 0.4.

[0025] In other embodiments, the structure of the heating wire 42 is an elliptical circular spiral structure wound around the outer circumference of the fixing rod 43 , and the cross-sectional structure of the groove body is an elliptical shape that matches the shape of the heating wire 42 .

[0026] In other embodiments, the ratio of the diameter of the fixing rod 43 to the inner diameter of the heating wire 42 is 0.9:1; and the ratio of the height H2 of the wire groove to the outer diameter of the heating wire 42 is 0.2.

[0027] Specific embodiment 2 of the heating device for producing substrate glass of the present invention: Based on the above technical concept of the present invention, or based on the above specific embodiment of the present invention, another embodiment is provided below.

[0028] In this embodiment, Figure 1 As shown, in the length direction of the heating furnace plate 41, pressure strips 44 are provided at both sides of the heating furnace plate 41, and the pressure strips 44 are provided along the height direction of the heating furnace plate 41, and both ends of the fixing rod 43 are fixedly connected to the pressure strips 44. The pressure strips 44 are fixedly mounted on the heating furnace plate 41 by screws 45; the pressure strips 44 are provided with mounting holes corresponding to the fixing rods 43, and both ends of the fixing rods 43 are mounted in the corresponding mounting holes.

[0029] The trough bodies can be arranged at unequal intervals along the height direction of the heating furnace plate 41. At this time, the heating elements are also arranged at unequal intervals along the height direction of the heating furnace plate 41, which may cause the heating wire 42 to heat the glass plate 1 unevenly. Therefore, in this embodiment, preferably, the trough bodies are arranged at equal intervals along the height direction of the heating furnace plate 41, so that the heating elements are arranged at equal intervals along the height direction of the heating furnace plate 41, thereby ensuring the heating uniformity of the heating wire 42 when heating the glass plate 1.

[0030] The specific installation method of the heating device for producing substrate glass of the present invention is: First, the fixing rod 43 passes through the heating wire 42, and the two ends of the fixing rod 43 are inserted into the corresponding mounting holes of the pressure strip 44; then, the pressure strip 44 is fixed to the heating furnace plate 41 by screws 45; finally, the assembled heating device is symmetrically placed on both sides of the glass plate 1, and the heating wire 42 is powered on for use.

[0031] Specific embodiment 1 of the heating method for producing substrate glass of the present invention: A heating method for producing substrate glass, based on the above-mentioned heating device for producing substrate glass, comprises the following steps: First, a plurality of slots are arranged in an array along the height direction of the heating furnace plate 41 on one side of the heating furnace plate 41 close to the glass plate 1; Secondly, the heating wire 42 is wound around the outer circumference of the fixing rod 43 along the length direction of the fixing rod 43 to form a heating element, and the heating element is arranged in the trough body along the length direction of the trough body to form a fixed installation with the heating furnace plate 41, and in the thickness direction of the heating furnace plate 41, the outer diameter of the heating wire 42 is greater than the height of the trough body; Next, the heating furnace plate 41 is placed on both sides of the glass plate 1, and the side with the heating element is placed close to the glass plate 1; Finally, the heating wire 42 is energized to achieve heating of the glass plate 1 .

[0032] Specifically, a heating method for producing substrate glass comprises the following steps: First, a plurality of grooves are arranged in an array along the height direction of the heating furnace plate 41 on one side of the heating furnace plate 41 close to the glass plate 1, and a high reflection layer 46 is provided on the inner side of the grooves, wherein the grooves penetrate the heating furnace plate 41 along the length direction of the heating furnace plate 41; the thickness of the high reflection layer 46 is 1-1.2 mm; Secondly, the heating wire 42 is wound on the outer circumference of the fixing rod 43 along the length direction of the fixing rod 43 to form a heating element, and the heating element is arranged in the slot body along the length direction of the slot body, wherein the ratio of the height of the wire slot to the outer diameter of the heating wire 42 is less than 0.5; the ratio of the diameter of the fixing rod 43 to the inner diameter of the heating wire 42 is (0.8-0.9):1; the distance between the high reflective layer 46 and the outer diameter of the heating wire 42 is greater than or equal to 5 mm; Next, the fixing rod 43 is arranged in the trough body along the length direction of the trough body, and its two ends are fixedly connected to the pressure strips 44 arranged at the two sides of the heating furnace plate 41 by screws 45, so that the heating element is fixedly connected to the heating furnace plate 41; Then, the heating furnace plate 41 is placed on both sides of the glass plate 1, and the side with the heating element is placed close to the glass plate 1; Finally, the heating wire 42 is energized to achieve heating of the glass plate 1 .

[0033] Through the above description of the specific embodiment of the heating device for producing substrate glass of the present invention, it can be seen that the heating device for producing substrate glass of the present invention comprises a heating furnace plate 41 and a plurality of heating elements, the heating furnace plate 41 is used to install the heating elements, and the heating elements are used to heat the glass plate 1; a plurality of slots are arranged on one side of the heating furnace plate 41 close to the glass plate 1, and the plurality of slots are arranged in an array along the height direction of the heating furnace plate 41, and the slots penetrate the heating furnace plate 41 along the length direction of the heating furnace plate 41, and the heating elements are arranged in the slots along the length direction of the slots for accommodating the heating elements; the heating elements comprise a fixing rod 43 and a heating wire 42, the fixing rod 43 is arranged in the slots along the length direction of the slots, and is fixedly installed with the heating furnace plate 41 for heating the glass plate 1. The wire 42 is fixedly installed on the chassis, and the heating wire 42 will not fall out of the slot body, thereby ensuring safety, reliability and stability in production; the heating wire 42 is wound around the outer circumference of the fixing rod 43 along the length direction of the fixing rod 43, and in the thickness direction of the heating furnace plate 41, the outer diameter of the heating wire 42 is greater than the height of the slot body, so that the radiation angle a of the heating wire 42 relative to the glass plate 1 is greater than 120°, and when heating the glass plate 1, the glass plate 1 is completely heated, thereby improving the quality of the product and the heating efficiency; furthermore, a high reflection layer is provided on the inner side surface of the slot body, and a certain distance is provided between the high reflection layer 46 and the outer diameter of the heating wire 42, so that the heating wire 42 does not directly contact the heating furnace plate 41, thereby ensuring good reflection and heat dissipation effects.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A heating device for producing substrate glass, characterized in that: include: A heating furnace plate (41) and a plurality of heating elements, wherein a plurality of grooves are provided on a side of the heating furnace plate (41) close to the glass plate (1), the plurality of grooves are arranged in an array along the height direction of the heating furnace plate (41), and the grooves penetrate the heating furnace plate (41) along the length direction of the heating furnace plate (41), and the heating elements are arranged in the grooves along the length direction of the grooves; the heating elements comprise a fixing rod (43) and a heating wire (42), the fixing rod (43) being arranged in the grooves along the length direction of the grooves and being fixedly mounted on the heating furnace plate (41); the heating wire (42) is wound around the outer peripheral surface of the fixing rod (43) along the length direction of the fixing rod (43), and in the thickness direction of the heating furnace plate (41), the outer diameter of the heating wire (42) is greater than the height of the grooves; a high reflection layer (46) is provided on the inner side surface of the grooves, and a certain distance is provided between the high reflection layer (46) and the outer diameter of the heating wire (42).

2. The heating device for producing substrate glass according to claim 1, characterized in that: The thickness of the high reflection layer (46) is 1-1.2 mm.

3. The heating device for producing substrate glass according to claim 2, characterized in that: The distance between the high reflective layer (46) and the outer diameter of the heating wire (42) is greater than or equal to 5 mm.

4. The heating device for producing substrate glass according to claim 1, characterized in that: In the length direction of the heating furnace plate (41), pressure strips (44) are arranged at both sides of the heating furnace plate (41), and the pressure strips (44) are arranged along the height direction of the heating furnace plate (41), and both ends of the fixing rod (43) are fixedly connected to the pressure strips (44).

5. The heating device for producing substrate glass according to claim 1, characterized in that: The trough bodies are arranged at equal intervals along the height direction of the heating furnace plate (41), so that the heating elements are arranged at equal intervals along the height direction of the heating furnace plate (41).

6. The heating device for producing substrate glass according to claim 1, characterized in that: The structure of the heating wire (42) is a circular spiral structure wound around the outer peripheral surface of the fixing rod (43).

7. The heating device for producing substrate glass according to claim 6, characterized in that: The ratio of the diameter of the fixing rod (43) to the inner diameter of the heating wire (42) is (0.8-0.9):

1.

8. The heating device for producing substrate glass according to claim 7, characterized in that: The ratio of the height of the wire groove to the outer diameter of the heating wire (42) is less than 0.

5.

9. The heating device for producing substrate glass according to claim 8, characterized in that: The cross-section of the groove body is configured as a semicircle whose shape matches the shape of the heating wire (42).

10. A heating method for producing substrate glass, characterized in that: The heating device for producing substrate glass according to any one of claims 1 to 9 comprises the following steps: S1, a plurality of slots are provided on a side of the heating furnace plate (41) close to the glass plate (1) and arranged in an array along the height direction of the heating furnace plate (41); S2, winding the heating wire (42) around the outer peripheral surface of the fixing rod (43) along the length direction of the fixing rod (43) to form a heating element, and arranging the heating element in the trough body along the length direction of the trough body to form a fixed installation with the heating furnace plate (41), and in the thickness direction of the heating furnace plate (41), the outer diameter of the heating wire (42) is greater than the height of the trough body; S3, placing the heating furnace plate (41) on both sides of the glass plate (1), and placing the side provided with the heating element close to the glass plate (1); S4, the heating wire (42) is energized to achieve heating treatment of the glass plate (1).

Images