Heating device and method for substrate glass production
By setting a groove and fixing rod on the heating furnace plate, combined with the design of a high reflective layer, the problems of small radiation area and melting of the heating wire are solved, realizing efficient and safe glass plate heating, and improving product quality and production stability.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- IRICO DISPLAY DEVICES CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-06-11
AI Technical Summary
Existing heating devices suffer from poor product quality and poor production safety due to the small heating radiation area of the heating wire and the tendency for the heating wire to melt.
Multiple slots are set on the heating furnace plate. Each slot contains a fixing rod and a heating wire. A high-reflectivity layer is provided on the inner side of the slot. The fixing rod is fixedly installed to the heating furnace plate. The heating wire is wound around the outer circumference of the fixing rod, and its outer diameter is larger than the height of the slot. The slots are arranged at equal intervals along the height of the heating furnace plate. A set distance is set between the high-reflectivity layer and the heating wire to ensure that the heating wire does not directly contact the furnace plate.
It improves heating efficiency and product quality, ensures production stability and safety, avoids heating wire detachment and melting, and achieves uniform heating of the glass plate.
Smart Images
Figure CN2025113523_11062026_PF_FP_ABST
Abstract
Description
A heating device and method for producing substrate glass Technical Field
[0001] This application relates to the field of substrate glass manufacturing technology, specifically to a heating device and method for substrate glass production. Background Technology
[0002] Substrate glass is one of the key materials for flat panel display devices and the carrier of panel manufacturing processes. During use, it requires high flatness and thermal stability, especially with the development of high-generation, high-resolution display technologies, which place increasingly higher demands on the performance of substrate glass. Overflow-processed substrate glass holds an important market position due to its surface quality improvement without the need for secondary processing; however, its process control technology is extremely difficult. When molten glass overflows and coalesces at the tip, a reasonable temperature field distribution is needed to control quality during the glass's descent. Therefore, heating devices are required on both sides of the glass plate to compensate for the temperature difference during cooling. Traditional heating devices, due to structural defects, have a small radiation area for the heating wire during heating radiation, resulting in incomplete heating of the glass plate, affecting product quality and exhibiting low heating efficiency. Furthermore, long-term production carries the risk of heating wire melting and detachment, leading to poor safety performance and impacting production stability and product quality. Summary of the Invention
[0003] The purpose of this application is to provide a heating device for substrate glass production, so as to solve the problems of poor product quality and poor production safety performance caused by the small heating radiation area of the heating wire and the melting of the heating wire in the prior art.
[0004] To address the aforementioned problems, this application proposes a heating device for substrate glass production, the technical solution of which is as follows:
[0005] A heating device for substrate glass production includes: a heating furnace plate and multiple heating elements. Multiple grooves are provided on the side of the heating furnace plate near the glass plate. The grooves are arranged in an array along the height direction of the heating furnace plate and extend through the heating furnace plate along its length direction. The heating elements are disposed within the grooves along their length direction. Each heating element includes a fixing rod and a heating wire. The fixing rod is disposed within the groove along its length direction and is fixedly installed to the heating furnace plate. The heating wire is wound around the outer circumference of the fixing rod along its length direction, and the outer diameter of the heating wire is greater than the height of the groove in the thickness direction of the heating furnace plate. A high-reflectivity layer is provided on the inner surface of the groove, and a certain distance is maintained between the high-reflectivity layer and the outer diameter of the heating wire.
[0006] In some embodiments, the thickness of the high-reflectivity layer is 1-1.2 mm.
[0007] In some embodiments, the distance between the high reflectivity layer and the outer diameter of the heating wire is greater than or equal to 5 mm.
[0008] In some embodiments, pressure strips are provided on both sides of the heating furnace plate along its length and along its height, and the two ends of the fixing rod are fixedly connected to the pressure strips.
[0009] In some embodiments, the tanks 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.
[0010] In some embodiments, the heating wire has a circular spiral structure wound around the outer circumferential surface of the fixed rod.
[0011] In some embodiments, the ratio of the diameter of the fixing rod to the inner diameter of the heating wire is (0.8~0.9):1.
[0012] In some embodiments, the ratio of the height of the wire groove to the outer diameter of the heating wire is less than 0.5.
[0013] In some embodiments, the cross-sectional structure of the groove is a semi-circle whose shape is adapted to the shape of the heating wire.
[0014] This application also proposes a heating method for substrate glass production, based on the aforementioned heating apparatus for substrate glass production, comprising the following steps:
[0015] S1, Multiple slots are arranged in an array along the height direction of the heating furnace plate on one side of the heating furnace plate near the glass plate;
[0016] S2, The heating wire is wound around the outer circumference of the fixed rod along the length direction to form a heating element, and the heating element is placed in the groove along the length direction of the groove to form a fixed installation with the heating furnace plate. In the thickness direction of the heating furnace plate, the outer diameter of the heating wire is greater than the height of the groove.
[0017] S3, place the heating plate on both sides of the glass plate, and position the side with the heating element closer to the glass plate;
[0018] S4, the heating wire is energized to heat the glass plate.
[0019] Compared with the prior art, this application has the following beneficial effects:
[0020] This application solves the problems of heating wire melting and falling off during long-term production in existing heating devices by setting a fixed rod on the heating furnace plate and winding the heating wire around the outer circumference of the fixed rod along its length. This makes the heating wire connected to the heating furnace plate through the fixed rod, which is convenient to install and can be used safely and reliably for a long time. It solves the problems of heating wire melting and falling off during long-term production in existing heating devices, thus improving production stability and product quality. At the same time, the outer diameter of the heating wire is larger than the height of the groove on the heating furnace plate in the thickness direction. During use, the radiation angle of the heating wire relative to the glass plate is greater than 120°. When heating the glass plate, the glass plate is heated completely, improving product quality and heating efficiency. Furthermore, a high-reflection layer is provided on the inner side of the groove, and a certain distance is provided 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, which can ensure good reflection and heat dissipation effects.
[0021] The thickness of the high-reflectivity layer is 1-1.2 mm, which further improves the reflection and heat dissipation effects.
[0022] The distance between the high-reflectivity layer and the outer diameter of the heating wire is greater than or equal to 5mm, which further improves the reflection and heat dissipation effect.
[0023] The tanks are arranged at equal intervals along the height of the heating plate, ensuring uniform heating by arranging the heating elements at equal intervals along the height of the heating plate. Attached Figure Description
[0024] Figure 1 is a schematic diagram of the structure of a heating device for substrate glass production in the prior art;
[0025] Figure 2 is a schematic diagram of the structure of a local heating unit in a heating device for substrate glass production in the prior art;
[0026] Figure 3 is a schematic diagram of the structure of the fixed wire ablation in the heating device for substrate glass production in the prior art;
[0027] Figure 4 is a three-dimensional schematic diagram of the heating device for substrate glass production of this application;
[0028] Figure 5 is a structural front view of the heating device for substrate glass production of this application;
[0029] Figure 6 is a schematic diagram of a partial heating unit of the heating device for substrate glass production of this application;
[0030] In the diagram, 1. Glass plate, 2. Thermal radiation zone, 3. Existing heating device, 31. Fixed furnace plate, 32. Spring wire, 33. Metal fixing wire, 34. Ablation, 35. Outer diameter of spring wire, 4. New heating device, 41. Heating furnace plate, 42. Heating wire, 43. Fixing rod, 44. Pressure strip, 45. Screw, 46. High reflectivity layer. Embodiments of the present invention
[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0032] As cited in the background art, existing heating devices suffer from poor product quality and safety due to the small heating radiation area of the heating wire and the tendency for the heating wire to melt. Specifically, as shown in Figures 1, 2, and 3, existing heating devices 3 are distributed on both sides of the glass plate 1, heating and compensating for 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 fixing wire 33. In use, the heating wire is spring-shaped, i.e., spring wire 32, placed in the corresponding wire groove of the fixed furnace plate 31 and fixed by the metal fixing wire 33. When the spring wire 32 is energized and heats up, the heating devices on both sides of the glass plate 1 heat the corresponding areas of the glass plate 1 through the heat radiation area 2. However, in the existing heating device 3, since the spring wire 32 is placed directly in the wire groove and in contact with the bottom of the groove, and the groove height H1 is greater than the outer diameter 35 of the spring wire, the heating radiation angle of the spring wire 32 is within 90°, and the radiation area is small. In addition, during the heating process, the spring wire 32 will expand and deform due to heat, and some of the spring wire 32 will fall out of the wire groove, or the metal fixing wire 33 will loosen and melt due to arcing, and the metal fixing wire 33 will be ablated 34 due to long-term high temperature.
[0033] Therefore, based on the above reasons, this application provides a heating device for substrate glass production, including a heating furnace plate 41 and multiple heating elements. The heating furnace plate 41 is used to install the heating elements, which are used to heat the glass plate 1. Multiple grooves are provided on the side of the heating furnace plate 41 near the glass plate 1. The multiple grooves are arranged in an array along the height direction of the heating furnace plate 41, and the grooves extend through the heating furnace plate 41 along its length direction. The heating elements are disposed in the grooves along their length direction to accommodate them. Each heating element includes a fixing rod 43 and a heating wire 42. The fixing rod 43 is disposed in the groove along its length direction and is fixedly installed with the heating furnace plate 41 to fix the heating wire 42 to the heating furnace plate. On 41, the heating wire 42 will not come out of the tank, ensuring safety, reliability and stability in production; the heating wire 42 is wound around the outer circumference of the fixing rod 43 along its length, 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 tank, 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 fully heated when it is heated, improving product quality and heating efficiency; furthermore, a high reflective layer is provided on the inner side of the tank, and a certain distance is provided between the high reflective 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 effect.
[0034] Specific embodiment 1 of the heating device for substrate glass production of this application:
[0035] In this embodiment, as shown in Figures 4, 5, and 6, the heating device for substrate glass production is a novel heating device 4, which includes a heating furnace plate 41 and multiple heating elements. Multiple grooves are provided on the side of the heating furnace plate 41 near the glass plate 1. These grooves are arranged in an array along the height direction of the heating furnace plate 41, and extend through the heating furnace plate 41 along its length direction. The heating elements are disposed within the grooves along their length direction. Each heating element includes a fixing rod 43 and a heating wire 42. The fixing rod 43 is disposed within the groove along its length direction and is fixedly installed to the heating furnace plate 41. The fixing rod 43 is used for fixing and installing the heating wire 42, and its material is a high-temperature resistant refractory material. The heating wire 42 is wound around the outer circumferential surface of the fixing rod 43 along its length direction, 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 groove. In use, after the heating wire 42 is energized and heated, the radiation angle α 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-reflectivity layer 46 is provided on the inner side of the tank, and a certain distance is provided between the high-reflectivity 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. When the heating wire 42 is energized and heats up, the heating purpose of the glass plate 1 area is achieved through the heat reflection of the high-reflectivity layer 46 and the heat radiation of the exposed part. At the same time, the heating wire 42 does not directly contact the heating furnace plate 41, and it does not require additional metal materials for fixation, ensuring good insulation and heat dissipation under energized conditions, and can be used safely for a long time. The thickness of the high-reflectivity layer 46 is 1-1.2mm, and the distance between the high-reflectivity layer 46 and the outer diameter of the heating wire 42 is greater than or equal to 5mm. Specifically, the thickness of the high-reflectivity layer 46 is 1mm, and the distance between the high-reflectivity layer 46 and the outer diameter of the heating wire 42 is 5mm.
[0036] In other embodiments, the thickness of the high reflectivity layer 46 is 1.2 mm, and the distance between the high reflectivity layer 46 and the outer diameter of the heating wire 42 is 7 mm.
[0037] In this embodiment, the heating wire 42 has a circular spiral structure wound around the outer circumference of the fixing rod 43, and the cross-sectional structure of the groove is a semi-circle that matches the shape of the heating wire 42. 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 ratio of the height H2 of the groove to the outer diameter of the heating wire 42 is less than 0.5. Specifically, the ratio of the diameter of the fixing rod 43 to the inner diameter of the heating wire 42 is 0.8:1; the ratio of the height H2 of the groove to the outer diameter of the heating wire 42 is 0.4.
[0038] In other embodiments, the heating wire 42 is an elliptical spiral structure wound around the outer circumferential surface of the fixing rod 43, and the cross-sectional structure of the groove is an ellipse that matches the shape of the heating wire 42.
[0039] 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; the ratio of the height H2 of the wire groove to the outer diameter of the heating wire 42 is 0.2.
[0040] Specific embodiment 2 of the heating device for substrate glass production of this application:
[0041] Based on the technical concept described above, or based on the specific embodiments of this application described above, another embodiment is provided below.
[0042] In this embodiment, as shown in Figure 1, pressure strips 44 are provided on both sides of the heating furnace plate 41 along its length, and the pressure strips 44 are arranged along the height direction of the heating furnace plate 41. The two ends of the fixing rod 43 are fixedly connected to the pressure strips 44. The pressure strips 44 are fixedly installed on the heating furnace plate 41 by screws 45; the pressure strips 44 are provided with mounting holes corresponding to the fixing rod 43, and the two ends of the fixing rod 43 are installed in the corresponding mounting holes.
[0043] The tanks 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. This may cause uneven heating of the heating wires 42 when heating the glass plate 1. Therefore, in this embodiment, it is preferable that the tanks 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, ensuring the uniformity of heating of the heating wires 42 when heating the glass plate 1.
[0044] The specific installation method of the heating device for substrate glass production in this application is as follows:
[0045] First, the fixing rod 43 passes through the heating wire 42, and at the same time, both 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.
[0046] Specific embodiment 1 of the heating method for substrate glass production of this application:
[0047] A heating method for producing substrate glass, based on the aforementioned heating apparatus for producing substrate glass, includes the following steps:
[0048] First, multiple 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 near the glass plate 1.
[0049] Secondly, the heating wire 42 is wound around the outer circumferential surface of the fixed rod 43 along the length direction of the fixed rod 43 to form a heating element, and the heating element is placed in the groove along the length direction of the groove body to form a fixed installation with the heating furnace plate 41. 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.
[0050] Next, the heating plate 41 is placed on both sides of the glass plate 1, with the side equipped with the heating element positioned close to the glass plate 1;
[0051] Finally, the heating wire 42 is energized to heat the glass plate 1.
[0052] Specifically, a heating method for producing substrate glass includes the following steps:
[0053] First, multiple 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 near the glass plate 1, and a high reflective layer 46 is provided on the inner side of the grooves. The grooves penetrate the heating furnace plate along the length direction of the heating furnace plate 41; the thickness of the high reflective layer 46 is 1-1.2mm.
[0054] Next, the heating wire 42 is wound around the outer circumference of the fixing rod 43 along its length to form a heating element, and the heating element is placed in the groove along its length. The ratio of the height of the groove 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; and the distance between the high reflective layer 46 and the outer diameter of the heating wire 42 is greater than or equal to 5mm.
[0055] Next, the fixing rod 43 is set in the groove along the length of the groove, and its two ends are fixedly connected to the pressure strips 44 set at both sides of the heating furnace plate 41 by screws 45, so that the heating element is fixedly connected to the heating furnace plate 41.
[0056] Then, the heating plate 41 is placed on both sides of the glass plate 1, with the side with the heating element positioned close to the glass plate 1;
[0057] Finally, the heating wire 42 is energized to heat the glass plate 1.
[0058] From the above description of specific embodiments of the heating device for substrate glass production of this application, it can be seen that the heating device for substrate glass production of this application includes a heating furnace plate 41 and multiple 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. Multiple grooves are provided on the side of the heating furnace plate 41 near the glass plate 1. The multiple 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. The heating elements are arranged in the grooves along the length direction of the grooves to accommodate the heating elements. The heating elements include a fixing rod 43 and a heating wire 42. The fixing rod 43 is arranged in the grooves along the length direction of the grooves and is fixedly installed with the heating furnace plate 41 to heat the glass plate 1. The heating wire 42 is fixedly installed on the chassis, preventing it from detaching from the tank and ensuring safety, reliability, and stability during production. The heating wire 42 is wound around the outer circumference of the fixing rod 43 along its length, and its outer diameter is greater than the height of the tank in the thickness direction of the heating plate 41. This results in a radiation angle α of the heating wire 42 relative to the glass plate 1 that is greater than 120°, ensuring complete heating of the glass plate 1 and improving product quality and heating efficiency. Furthermore, a high-reflectivity layer 46 is provided on the inner side of the tank, and a certain distance is maintained between the high-reflectivity layer 46 and the outer diameter of the heating wire 42, preventing direct contact between the heating wire 42 and the heating plate 41 and ensuring good reflection and heat dissipation.
[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. The scope of patent protection of this application shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this application shall also be included within the scope of protection of this application.
Claims
1. A heating device for producing a substrate glass, characterized by include: A heating furnace plate (41) and multiple heating elements are provided. Multiple grooves are provided on the side of the heating furnace plate (41) near the glass plate (1). The multiple 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). The heating elements are arranged in the grooves along the length direction of the grooves. The heating elements include a fixing rod (43) and a heating wire (42). The fixing rod (43) is arranged in the grooves along the length direction of the grooves and is fixedly installed with the heating furnace plate (41). 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 the outer diameter of the heating wire (42) is greater than the height of the grooves in the thickness direction of the heating furnace plate (41). A high reflective layer (46) is provided on the inner side of the grooves, and a certain distance is provided between the high reflective layer (46) and the outer diameter of the heating wire (42).
2. The heating device for substrate glass production according to claim 1, characterized in that, The thickness of the high reflectivity layer (46) is 1-1.2 mm.
3. The heating device for substrate glass production according to claim 2, characterized in that, The distance between the high reflectivity layer (46) and the outer diameter of the heating wire (42) is greater than or equal to 5 mm.
4. The heating device for substrate glass production according to claim 1, characterized in that, Along the length of the heating furnace plate (41), pressure strips (44) are provided on both sides of the heating furnace plate (41), and the pressure strips (44) are provided along the height of the heating furnace plate (41). The two ends of the fixing rod (43) are fixedly connected to the pressure strips (44).
5. The heating device for producing a substrate glass according to claim 1, wherein The tanks 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 a substrate glass according to claim 1, wherein The heating wire (42) has a circular spiral structure that is wound around the outer circumference of the fixed rod (43).
7. The heating device for producing a substrate glass according to claim 6, wherein 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 a substrate glass according to claim 7, wherein 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 a substrate glass according to claim 8, wherein The cross-sectional structure of the groove is a semi-circle that matches the shape of the heating wire (42).
10. A heating method for producing a substrate glass, characterized by The heating apparatus for substrate glass production according to any one of claims 1-9 includes the following steps: S1, multiple 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) near the glass plate (1); S2, the heating wire (42) is wound around the outer circumference of the fixed rod (43) along the length direction to form a heating element, and the heating element is placed in the groove along the length direction of the groove to form a fixed installation with the heating furnace plate (41), and the outer diameter of the heating wire (42) is greater than the height of the groove in the thickness direction of the heating furnace plate (41). S3, place the heating furnace plate (41) on both sides of the glass plate (1), and set the side with the heating element close to the glass plate (1); S4, the heating wire (42) is energized to heat the glass plate (1).