CN108996892B - Drainage plate for substrate glass production and construction method thereof - Google Patents
Drainage plate for substrate glass production and construction method thereof Download PDFInfo
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- CN108996892B CN108996892B CN201810844603.8A CN201810844603A CN108996892B CN 108996892 B CN108996892 B CN 108996892B CN 201810844603 A CN201810844603 A CN 201810844603A CN 108996892 B CN108996892 B CN 108996892B
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
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Abstract
The invention provides a drainage plate for producing base plate glass and a construction method thereof, wherein the drainage plate comprises a drainage surface and an overflow brick binding surface, and the drainage surface is a smooth curved surface; when the overflow brick is used, the joint surface of the overflow brick is jointed on the inclined plane at one end of the tip of the overflow brick, and the glass liquid at the end part of the overflow brick flows down from the drainage surface. The drainage surface of the invention can meet the requirements of glass liquid material gathering and the thickness of the edge part, and ensure the width gain requirement of the glass plate of the substrate. According to the invention, the curved surface shape of the drainage plate is optimized, the bonding state of the edge glass metal is improved, the edge glass is prevented from generating pores, and the thickness of the edge glass is increased, so that the state of the glass edge plate of the substrate is improved, and the quality of overflow downdraw forming is stabilized.
Description
Technical Field
The invention belongs to the field of substrate glass manufacturing, and relates to a drainage plate for substrate glass production and a construction method thereof.
Background
The substrate glass used in flat panel display technology, which has a thickness of 0.3mm to 1.0mm, is one of the key components in flat panel displays. The flat panel display has extremely high requirements on optical, mechanical strength, thermal stability and surface flatness of the substrate glass, and thus is particularly important for quality and production stability control in the production process of the substrate glass.
The overflow downdraw process can form high quality thin sheet substrate glass that can be used in a variety of devices like flat panel displays. The overflow down-draw method is a preferred technique for producing substrate glass used in flat panel displays because this process can produce substrate glass having a surface with more excellent flatness and smoothness than substrate glass produced by other methods.
The overflow downdraw process utilizes a specially shaped forming device refractory block known as an overflow brick over which molten glass flows down from both sides and meets at the bottom to form a single substrate glass. As shown in fig. 1, a conventional forming apparatus 100 includes an inlet 102 that receives molten glass 104, and the molten glass 104 flows into a trough 106 (e.g., a weir 106) and then overflows and flows down two edges 108a and 108b before melting together at what is referred to as a root 110 due to gravity and the force of the pulling rolls that pull the molten glass 104. The root 110 is where the two sides 108a and 108b come together and where the two overflow walls of the molten glass 104 rejoin, after which the molten glass is pulled downward and cooled to form a substrate glass 112.
The edge portion of the glass needs to be drained, and therefore a drainage plate is needed, which is used for reducing the width attenuation and the sensitivity to flow instability of the substrate glass plate, and simultaneously controlling the state of the substrate glass edge plate (such as the glass adhesion and the thickness of the edge plate). The substrate glass side plate state determines the stability of substrate glass pulling and pulling, and the bonding quality state of the side glass is more important along with the increase of the breadth size of the substrate glass plate.
The existing curved surface of the drainage plate is formed by splicing a plurality of sections of curved surfaces, the smoothness of the curved surface is easy to cause poor, the glass liquid flowing through the drainage plate is difficult to flow, the state of a thin substrate glass side plate is poor, holes and side edge misalignment are easy to cause, and meanwhile, the substrate glass plate is large in weight change, unstable in process and poor in warping and stress quality of products.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a drainage plate for producing substrate glass and a construction method thereof, namely, the curved surface shape of the drainage plate is optimized, the bonding state of edge glass liquid is improved, the edge glass is prevented from generating pores, the thickness of the edge glass is increased, the state of the substrate glass edge plate is improved, and the quality of overflow downdraw forming is stabilized.
The invention is realized by the following technical scheme:
a drainage plate for producing base plate glass comprises a drainage surface and an overflow brick binding surface, wherein the drainage surface is a smooth curved surface; when the overflow brick is used, the joint surface of the overflow brick is jointed on the inclined plane at one end of the tip of the overflow brick, and the glass liquid at the end part of the overflow brick flows down from the drainage surface.
Preferably, the drainage plate is a cone, and the drainage surface and the overflow brick attaching surface are two side surfaces of the cone.
Furthermore, the drainage surface is provided with four vertexes, namely an innermost stretching point of the drainage surface, a sharp point of the drainage plate, an outermost starting point of the drainage surface and a vertex of the drainage plate; when the drainage plate is used, the lowest point of the drainage surface is a drainage plate sharp point, the drainage plate sharp point is positioned on a vertical surface where the overflow brick sharp point is positioned, the innermost point of the drainage surface, which is in contact with the overflow brick, is the innermost stretching point of the drainage surface, the highest point of the drainage surface is the vertex of the drainage plate, the outermost starting point of the drainage surface and the innermost stretching point of the drainage surface are positioned in the same horizontal plane, and the outermost starting point of the drainage surface and the vertex of the drainage plate are positioned in the same horizontal planeAre positioned on the same vertical line; the horizontal distance from the drainage plate cusp to the innermost stretching point of the drainage surface is the horizontal distance L of the drainage plate cusp2Horizontal distance L between the tips of the drainage plates2100-; the vertical distance from the sharp point of the drainage plate to the innermost stretching point of the drainage surface is the vertical distance H from the sharp point of the drainage plate2Vertical distance H between the tips of the drainage plates2Is 45-90 mm; the vertical distance H between the top of the drainage plate and the innermost stretching point of the drainage surface1-H2Equal to the height of the overflow bricks.
Preferably, the connection of the lower part symmetry of two drainage plates is as an organic whole, and the overflow brick binding face of two drainage plates is relative, and contained angle and the cooperation of overflow brick point portion contained angle between the overflow brick binding face of two drainage plates.
The method for constructing the drainage plate for producing the substrate glass comprises the steps of determining each vertex of a drainage surface according to glass liquid aggregate requirements, substrate glass edge thickness requirements, substrate glass plate width gain requirements and overflow brick heights, and then generating a smooth curved surface according to the obtained vertex by adopting three-dimensional model software.
Preferably, the drainage plate is a cone, and the drainage surface and the overflow brick attaching surface are two side surfaces of the cone; the drainage surface is provided with four vertexes, namely an innermost stretching point of the drainage surface, a sharp point of the drainage plate, an outermost starting point of the drainage surface and a vertex of the drainage plate; determining each vertex of the drainage surface according to the glass liquid gathering requirement, the substrate glass edge thickness requirement, the substrate glass plate width gain requirement and the overflow brick height specifically comprises the following steps:
when the drainage device is used, the lowest point of the drainage surface is a drainage plate sharp point, the drainage plate sharp point is positioned on a vertical surface where the sharp point of the overflow brick is positioned, the innermost point of the drainage surface, which is in contact with the overflow brick, is the innermost stretching point of the drainage surface, the highest point of the drainage surface is the vertex of the drainage plate, the outermost starting point of the drainage surface and the innermost stretching point of the drainage surface are positioned in the same horizontal plane, and the outermost starting point of the drainage surface and the vertex of the drainage plate are positioned on the same vertical line; the horizontal distance from the drainage plate cusp to the innermost stretching point of the drainage surface is the horizontal distance L of the drainage plate cusp2Horizontal distance L between the tips of the drainage plates2100-; the point of the drainage plate is the farthest from the drainage surfaceThe vertical distance between the inner side stretching points is the vertical distance H of the cusp of the drainage plate2Vertical distance H between the tips of the drainage plates2Is 45-90 mm; the vertical distance H between the top of the drainage plate and the innermost stretching point of the drainage surface1-H2Equal to the height of the overflow bricks;
setting the position of the innermost stretching point of the drainage surface, determining the cusp of the drainage plate, the outermost starting point of the drainage surface and the vertex of the drainage plate according to the innermost stretching point of the drainage surface, and forming a smooth curved surface on the four vertexes by adopting three-dimensional model software.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, the curved surface of the drainage plate at the edge of the overflow brick assembly is designed and optimized, so that the formed drainage plate is a curved surface from top to bottom, the shape of the curved surface is smooth, flowing glass liquid can flow conveniently, the pore state and edge misalignment state of the edge of the glass substrate are improved, and the weight, warpage and stress state of the glass substrate are improved to a certain extent in the production process. The state of the glass side plate of the substrate is improved by optimizing the curved surface of the drainage plate of the core equipment for manufacturing the glass substrate, so that the manufacturing stability of the glass substrate is improved, and the good quality of the glass substrate is ensured. The drainage surface of the drainage plate has good smoothness and is favorable for processing and manufacturing.
Furthermore, the design of the drainage plate ensures that the horizontal distance L between the sharp points of the drainage plate2Can meet the requirements of glass liquid material gathering and the thickness of the edge part, and the vertical distance H of the sharp point of the drainage plate2The width gain requirement of the glass plate of the substrate is ensured, so that the drainage plate of the invention also meets various production requirements while forming a curved surface with good smoothness.
Furthermore, connect two drainage plates as an organic whole, directly adorn at overflow brick point portion, reduce the installation procedure, the drainage plate of overflow brick one end can once only be installed and accomplish.
The construction method of the drainage plate can obtain smooth curved surfaces, meet various production requirements and obtain substrate glass meeting the requirements, and can provide guidance for the design of the subsequent drainage plate.
Drawings
FIG. 1 is a diagram of an overflow downdraw apparatus.
FIG. 2 is a schematic view of the structure of a flow guide plate, wherein (a) is a front view of the flow guide plate, and (b) is a right side view of the view of (a) when two flow guide plates are connected into a whole.
FIG. 3 is a schematic view of a flow guide plate mounted on an overflow brick.
FIG. 4 is a schematic diagram of the flow path of molten glass between a drainage plate and an edge roller.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in FIG. 2, the drainage plate of the invention is a cone, the cone comprises a drainage surface 5 and an overflow brick attaching surface, and the drainage surface 5 is a smooth curved surface; when the overflow brick is used, the joint surface of the overflow brick is jointed on the inclined surface at one end of the tip of the overflow brick 6, and the glass liquid at the end part of the overflow brick flows down from the drainage surface to form a thin substrate glass side plate, as shown in figure 3. The drainage surface 5 is a curved surface from top to bottom and is a working surface of the drainage plate, the glass liquid flows down from the drainage surface 5, and the flow path of the glass liquid between the drainage plate and the edge roller is shown in fig. 4.
The drainage surface 5 is provided with four vertexes, namely an innermost stretching point 1 of the drainage surface, a sharp point 2 of the drainage plate, an outermost starting point 3 of the drainage surface and a vertex 4 of the drainage plate; when the drainage device is used, the lowest point of the drainage surface 5 is a drainage plate sharp point 2, the drainage plate sharp point 2 is positioned on a vertical surface where the sharp part of the overflow brick 6 is positioned, the innermost point of the drainage surface 5 contacted with the overflow brick 6 is a drainage surface innermost stretching point 1, the highest point of the drainage surface 5 is a drainage plate vertex 4, the outermost side initial point 3 of the drainage surface and the innermost stretching point 1 of the drainage surface are positioned in the same horizontal plane, the outermost side initial point 3 of the drainage surface and the drainage plate vertex 4 are positioned on the same vertical line, and the outermost side initial point 3 of the drainage surface and the end part of the overflow brick are positioned in parallel and level; the horizontal distance from the drainage plate sharp point 2 to the innermost stretching point 1 of the drainage surface is the horizontal distance L of the drainage plate sharp point2Horizontal distance L between the tips of the drainage plates2100-; the vertical distance from the drainage plate sharp point 2 to the innermost stretching point 1 of the drainage surface is the drainage plateVertical distance H of sharp point2Vertical distance H between the tips of the drainage plates2Is 45-90 mm; the vertical distance H between the vertex 4 of the drainage plate and the innermost stretching point 1 of the drainage surface1-H2Equal to the height of the overflow bricks. The horizontal distance from the outermost starting point 3 of the drainage surface to the innermost stretching point 1 of the drainage surface is L3。H1The vertical distance between the apex 2 of the drainage plate and the apex 4 of the drainage plate.
The principle of the design basis of the drainage surface of the drainage plate is as follows:
1. horizontal distance L of drainage plate sharp point2Can meet the requirements of glass liquid material gathering and the thickness of the edge.
2. Vertical distance H of sharp point of drainage plate2The requirement of the width and the gain of the glass plate of the substrate is ensured.
The construction method of the drainage plate for producing the substrate glass comprises the steps of setting an innermost stretching point 1 of a drainage surface according to the principle, determining a drainage plate sharp point 2, an outermost starting point 3 of the drainage surface and a drainage plate vertex 4 according to the innermost stretching point 1 of the drainage surface, and forming a smooth curved surface by adopting three-dimensional model software.
During the use, with overflow brick binding face laminating fixed on the inclined plane of 6 sharp portions one end of overflow brick, as shown in fig. 2, overflow brick sharp portion both ends are installed the drainage plate respectively, and a drainage plate is installed respectively to every end both sides, and the drainage face of both ends drainage plate is relative, the drainage face symmetry of both sides drainage plate.
The connection of the lower part symmetry that can also will install two drainage plates in overflow brick point portion both sides is as an organic whole, and the overflow brick binding face of two drainage plates is relative, and contained angle and the cooperation of overflow brick point portion contained angle between the overflow brick binding face of two drainage plates, during the use, inserts overflow brick point portion between the two drainage plate binding faces. When two drainage plates are connected into a whole, the distance L between the drainage plates1And the included angle alpha between the drainage plate and the drainage plate meets the thickness requirement of the overflow brick.
According to the invention, the curved surface of the drainage plate at the edge of the overflow brick assembly is designed and optimized, so that the formed drainage plate is a curved surface from top to bottom, the shape of the curved surface is smooth, flowing glass liquid can flow conveniently, the pore state and edge misalignment state of the edge of the glass substrate are improved, and the weight, warpage and stress state of the glass substrate are improved to a certain extent in the production process. The effect of the drainage plates on the substrate glass before and after modification is shown in table 1.
TABLE 1 SCH02 line initial lead quality status
| Item | Target | Production line quality before drainage plate improvement | Production line quality after drainage plate improvement |
| Width of board | ＞ 1820mm | 1843.5mm ◎ | 1853mm ◎ |
| Thickness of side plate | 1.2mm<T<2.0mm | Proximal end 1.406 mm- | T0.7mm proximal end 1.87mm very good end 1.56mm very good T0.5mm proximal end 1.67mm very good end 1.47mm very good |
Wherein ∈: pass, reach design goal ∘: the design target is not reached, and the process requirement can be met reluctantly.
It can be seen from table 1 that the width of the improved rear plate width of the drainage plate is slightly larger than that of the improved front plate width, and the thickness of the initial plate guiding side plate after the improved rear drainage plate is used is larger than that of the improved front drainage plate.
Claims (2)
1. The drainage plate for producing the substrate glass is characterized by comprising a drainage surface (5) and an overflow brick binding surface, wherein the drainage surface (5) is a smooth curved surface; when the overflow brick is used, the joint surface of the overflow brick is jointed on the inclined plane at one end of the tip of the overflow brick (6), and the glass liquid at the end part of the overflow brick flows down from the drainage surface (5);
the drainage plate is a cone, and the drainage surface (5) and the overflow brick binding surface are two side surfaces of the cone;
the drainage surface (5) is provided with four vertexes, namely an innermost stretching point (1) of the drainage surface, a sharp point (2) of the drainage plate, an outermost starting point (3) of the drainage surface and a vertex (4) of the drainage plate; when the drainage plate is used, the lowest point of the drainage surface (5) is a drainage plate sharp point (2), the drainage plate sharp point (2) is located on a vertical surface where the sharp part of the overflow brick (6) is located, the innermost point of the drainage surface (5) in contact with the overflow brick (6) is a drainage surface innermost stretching point (1), the highest point of the drainage surface (5) is a drainage plate vertex (4), the drainage surface outermost starting point (3) and the drainage surface innermost stretching point (1) are located in the same horizontal plane, and the drainage surface outermost starting point (3) and the drainage plate vertex (4) are located on the same vertical line; the horizontal distance between the drainage plate sharp point (2) and the innermost stretching point (1) of the drainage surface is the horizontal distance L of the drainage plate sharp point2Horizontal distance L between the tips of the drainage plates2100-; the vertical distance between the drainage plate sharp point (2) and the innermost stretching point (1) of the drainage surface is the vertical distance H of the drainage plate sharp point2Vertical distance H between the tips of the drainage plates2Is 45-90 mm; the vertical distance H between the vertex (4) of the drainage plate and the innermost stretching point (1) of the drainage surface1-H2Equal to the height of the overflow bricks; h1The vertical distance between the drainage plate sharp point (2) and the drainage plate vertex (4);
the connection of the lower part symmetry of two drainage plates is as an organic whole, and the overflow brick binding face of two drainage plates is relative, and contained angle and overflow brick (6) point portion contained angle cooperation between the overflow brick binding face of two drainage plates.
2. The method for constructing the drainage plate for producing the substrate glass, according to the claim 1, is characterized in that each vertex of the drainage surface (5) is determined according to the requirements of glass liquid aggregate, the thickness of the edge of the substrate glass, the width gain of the substrate glass and the height of the overflow brick, and then a smooth curved surface is generated according to the obtained vertex by adopting three-dimensional model software;
the drainage plate is a cone, and the drainage surface (5) and the overflow brick binding surface are two side surfaces of the cone; the drainage surface (5) is provided with four vertexes, namely an innermost stretching point (1) of the drainage surface, a sharp point (2) of the drainage plate, an outermost starting point (3) of the drainage surface and a vertex (4) of the drainage plate; determining each vertex of the drainage surface (5) according to the glass liquid gathering requirement, the substrate glass edge thickness requirement, the substrate glass plate width gain requirement and the overflow brick height specifically comprises the following steps:
when the drainage plate is used, the lowest point of the drainage surface (5) is a drainage plate sharp point (2), the drainage plate sharp point (2) is located on a vertical surface where the sharp part of the overflow brick (6) is located, the innermost point of the drainage surface (5) in contact with the overflow brick (6) is a drainage surface innermost stretching point (1), the highest point of the drainage surface (5) is a drainage plate vertex (4), the drainage surface outermost starting point (3) and the drainage surface innermost stretching point (1) are located in the same horizontal plane, and the drainage surface outermost starting point (3) and the drainage plate vertex (4) are located on the same vertical line; the horizontal distance between the drainage plate sharp point (2) and the innermost stretching point (1) of the drainage surface is the horizontal distance L of the drainage plate sharp point2Horizontal distance L between the tips of the drainage plates2100-; the vertical distance between the drainage plate sharp point (2) and the innermost stretching point (1) of the drainage surface is the vertical distance H of the drainage plate sharp point2Vertical distance H between the tips of the drainage plates2Is 45-90 mm; the vertical distance H between the vertex (4) of the drainage plate and the innermost stretching point (1) of the drainage surface1-H2Equal to the height of the overflow bricks;
setting the position of the innermost stretching point (1) of the drainage surface, determining the sharp point (2) of the drainage plate, the outermost starting point (3) of the drainage surface and the vertex (4) of the drainage plate according to the innermost stretching point (1) of the drainage surface, and forming a smooth curved surface on the four vertices by adopting three-dimensional model software.
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| CN108996892B true CN108996892B (en) | 2021-10-08 |
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| CN110615608A (en) * | 2019-10-22 | 2019-12-27 | 河北省沙河玻璃技术研究院 | Platinum-rhodium alloy bushing plate suitable for drawing flexible glass |
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| GB1283778A (en) * | 1968-08-07 | 1972-08-02 | Corning Glass Works | Maintaining sheet glass width |
| CN101128399A (en) * | 2005-02-24 | 2008-02-20 | 康宁股份有限公司 | Apparatus and method for making a glass sheet |
| CN201317729Y (en) * | 2008-09-27 | 2009-09-30 | 陕西彩虹电子玻璃有限公司 | Plate-width increased type overflow groove device for photoelectric glass production |
| CN202785978U (en) * | 2012-07-31 | 2013-03-13 | 彩虹显示器件股份有限公司 | Device for improving overflow width |
| JP2017202965A (en) * | 2016-05-13 | 2017-11-16 | 日本電気硝子株式会社 | Plate glass manufacturing apparatus, and manufacturing method therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017210233A1 (en) * | 2016-06-02 | 2017-12-07 | Corning Incorporated | Methods and apparatuses including edge directors for forming glass ribbons |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1283778A (en) * | 1968-08-07 | 1972-08-02 | Corning Glass Works | Maintaining sheet glass width |
| CN101128399A (en) * | 2005-02-24 | 2008-02-20 | 康宁股份有限公司 | Apparatus and method for making a glass sheet |
| CN201317729Y (en) * | 2008-09-27 | 2009-09-30 | 陕西彩虹电子玻璃有限公司 | Plate-width increased type overflow groove device for photoelectric glass production |
| CN202785978U (en) * | 2012-07-31 | 2013-03-13 | 彩虹显示器件股份有限公司 | Device for improving overflow width |
| JP2017202965A (en) * | 2016-05-13 | 2017-11-16 | 日本電気硝子株式会社 | Plate glass manufacturing apparatus, and manufacturing method therefor |
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