CN108101345B - Integrated thickness air adjusting system and method for glass substrate forming equipment - Google Patents
Integrated thickness air adjusting system and method for glass substrate forming equipment Download PDFInfo
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- CN108101345B CN108101345B CN201711176339.7A CN201711176339A CN108101345B CN 108101345 B CN108101345 B CN 108101345B CN 201711176339 A CN201711176339 A CN 201711176339A CN 108101345 B CN108101345 B CN 108101345B
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- C—CHEMISTRY; METALLURGY
- 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
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
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Abstract
The invention provides an integrated thickness air adjusting system and method for glass substrate forming equipment, which comprises an air collecting pipe, a heating air pipe and an air exhaust pipe, wherein the air collecting pipe, the heating air pipe and the air exhaust pipe are all connected with the glass substrate forming equipment, and the air collecting pipe, the heating air pipe and the air exhaust pipe are alternately used according to the production process requirement; three different thickness air adjusting systems are selected according to the production process requirements of the glass substrate, the process margin of thickness adjustment is expanded through the application of the system, the thickness adjusting process method is increased, the quality fluctuation of products is favorably controlled, and the quality grade of the products is improved.
Description
Technical Field
The patent belongs to the field of glass substrate production, and particularly relates to an integrated thickness air adjusting system and method for glass substrate forming equipment.
Background
The overflow downdraw method is a method of producing glass sheets in the glass manufacturing art. The overflow downdraw process produces glass sheets having surfaces with superior flatness and smoothness compared to other processes. With the tendency of large-scale glass plate manufacturing, the width direction can reach more than 2000mm, so that the temperature in the width direction is ensured to be uniform and adjustable, and the control of the whole temperature field of the forming equipment is very important. Particularly, in a forming thickness adjusting area, the thickness of the thickness air duct corresponding to the substrate is often opposite, that is, the air volume is maximum, the thickness curve is still in a valley, the air volume is zero, the thickness curve is in a peak value, and other contradictory situations occur. In order to solve similar technical problems, an integrated thickness wind adjusting and controlling system is designed.
Disclosure of Invention
The invention aims to provide an integrated thickness air adjusting system and method for glass substrate forming equipment, which solve the problem that the thickness of a thickness air pipe corresponding to a substrate is opposite when the existing glass substrate is produced, namely the air quantity is maximum, the thickness curve is still in a valley, the air quantity is zero, the thickness curve is in a peak value and other contradictory defects.
In order to achieve the purpose, the invention adopts the technical scheme that:
the integrated thickness air adjusting system for the glass substrate forming equipment comprises an air collecting pipe, a heating air pipe and an air exhaust pipe, wherein the air collecting pipe, the heating air pipe and the air exhaust pipe are all connected with the glass substrate forming equipment, and the air collecting pipe, the heating air pipe and the air exhaust pipe are alternately used according to the production process requirements.
Preferably, the wind collecting pipe is connected with the air inlet through a first connecting hose, the heating wind pipe is connected with the second connecting hose and the exhaust pipe is connected with the air inlet through a third connecting hose.
Preferably, the air collecting pipe is provided with a first flow meter, the heating air pipe is provided with a second flow meter, and the exhaust pipe is provided with a third flow meter.
Preferably, one end of the exhaust pipe is an open end, and the other end of the exhaust pipe is a closed end; an air draft device is arranged at the opening end of the air draft pipe.
Preferably, the pipe wall of the heating pipe is composed of a heat insulation layer, a heater and a heat conduction layer, wherein the heat insulation layer is arranged as an outer wall, the heat conduction layer is arranged as an inner wall, and the heater is arranged between the heat insulation layer and the heat conduction layer.
When the peak value of the thickness distribution limit area of a product exceeds the upper thickness limit deviation and the valley value of the thickness distribution limit area approaches the lower thickness limit deviation, the air inlet of the thickness distribution limit area corresponding to the peak value is communicated with an air collecting pipe, and the air inlet corresponding to the valley value is communicated with an air exhaust pipe;
when the valley value of the thickness distribution limit area of the product exceeds the thickness lower limit deviation and the peak value of the thickness distribution limit area is close to the thickness upper limit deviation, the air inlet corresponding to the valley value is communicated with the air collecting pipe, and meanwhile, the air inlet corresponding to the peak value is communicated with the heating air pipe;
when the thickness distribution limit area of the product is arranged between the upper thickness limit deviation and the lower thickness limit deviation and is in a wave shape, then:
if the deviation of the peak value is larger than the deviation of the valley value, communicating the air inlet corresponding to the thickness distribution limit area corresponding to the peak value with the hot air pipe, and communicating the air inlet corresponding to the thickness distribution limit area corresponding to the valley value with the air collecting pipe;
and if the deviation of the valley value is larger than that of the peak value, communicating the air inlet corresponding to the thickness distribution limit area corresponding to the valley value with the exhaust pipe, and communicating the air inlet corresponding to the thickness distribution limit area corresponding to the peak value with the air collecting pipe.
Compared with the prior art, the invention has the beneficial effects that:
according to the integrated thickness air adjusting system for the glass substrate forming equipment, the cooling device, the heating device and the air draft device are integrated on the glass substrate forming equipment, three different thickness air adjusting systems are selected according to the production process requirements of the glass substrate, and through the application of the system, the thickness adjusting process means are increased, so that the product quality is improved.
According to the integrated thickness wind adjusting method for the glass substrate forming equipment, when the thickness of a product is abnormal, the process adjusting means and method are expanded by adding the hot wind and the air draft device, optimization is carried out through different combination adjustments, and the glass thickness is maintained within the minimum fluctuation range as far as possible.
Drawings
FIG. 1 is a prior art thickness wind adjustment system;
FIG. 2 is a front view of a thickness wind adjustment system according to the present invention;
FIG. 3 is a top view of a thickness wind adjustment system according to the present invention;
FIG. 4 is a schematic structural view of a heated air duct;
FIG. 5 is a first thickness distribution trend graph;
FIG. 6 is a second graphical representation of the thickness distribution trend;
FIG. 7 is a thickness distribution trend graph III;
FIG. 8 is a thickness distribution trend graph four;
wherein, 1, a soaking box body 2, a blowpipe 3, a blast pipe beam 4, a first connecting hose 5, a first flowmeter 6, an air collecting pipe 7, a second flowmeter 8, a third flowmeter 9, a second connecting hose 10, a third connecting hose 11, a heating blast pipe 12, an air exhaust pipe 13, an air exhaust device 11-1, a heat preservation layer 11-2, a heater 11-3, a heat conduction layer 14, a thickness distribution curve 15, an upper thickness limit deviation 16, a lower thickness limit deviation 2-1, a first air inlet 2-2, a second air inlet 2-3, a third air inlet 2-4, a fourth air inlet 14-1, a first thickness distribution limit region 14-2, a second thickness distribution limit region 14-3, a third thickness distribution limit region 14-4, a third air inlet 2-4, a third air inlet and a third air inlet, A fourth thickness distribution limiting region.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the existing integrated thickness air for glass substrate forming equipment adopts cooling air as an adjusting system, and comprises a soaking box body 1, wherein a plurality of blowpipes 2 are uniformly distributed on the soaking box body 1, and one ends of the blowpipes 2 penetrate through an air pipe beam 3 and are connected with an air collecting pipe 6 through a first connecting hose 4; meanwhile, the air collecting pipe 6 is provided with a first flowmeter 5.
Specifically, cooling air adjustment system gets into collection tuber pipe 6 through the cooling air of certain pressure, is provided with the air outlet that corresponds quantity with tuber pipe 2 on the collection tuber pipe 6, installs flow control meter 5 on the air outlet, in actual production, according to the technology needs, adjusts the flow valve switch that corresponds, can reach the purpose that the adjustment corresponds the product thickness point.
In practical application, especially in a forming thickness adjusting area, the situation that the thicknesses of the thickness air pipes corresponding to the substrates are opposite often occurs, namely, the situation that the air volume is the largest, the thickness curve is still in a valley, the air volume is a zero thickness curve, and the situation that the air volume is in a peak value is contradictory to each other.
The integrated thickness air adjusting system for the glass substrate forming equipment provided by the invention is characterized in that a heating device and an air draft device are added on the original cooling air adjusting system, and the cooling air device, the heating device and the air draft device are applied in an integrated manner, so that the corresponding area of each air pipe is quickly adjusted to a required temperature field, and the purpose of stabilizing the product quality is achieved.
As shown in fig. 2 and 3, the integrated thickness air adjusting system for glass substrate forming equipment provided by the invention comprises an air collecting pipe 6, a heating air pipe 11 and an exhaust pipe 12, wherein the air collecting pipe 6 is provided with air blowing ports with the same number as that of the air blowing pipes, and the air blowing ports are connected with the air blowing pipes 2 through first connecting hoses 4; the heating air pipe 11 is provided with blowing openings with the same number as the blowing pipes, and the blowing openings in the heating air pipe 11 are connected with the blowing pipes 2 through second connecting hoses 9; the exhaust pipe 12 is provided with blowing openings with the same number as the blowing pipes, and the blowing openings on the exhaust pipe 12 are connected with the blowing pipes 2 through third connecting hoses 10; meanwhile, the air collecting duct 6, the heating air duct 11 and the exhaust duct 12 are used alternately.
The heating air pipe 11 and the exhaust air pipe 12 are respectively provided with a high-temperature resistant second flowmeter 7 and a high-temperature resistant third flowmeter 8.
One end of the exhaust pipe 12 is an open end; the other end is a closed end, an air exhaust device 13 is arranged at the open end of the air exhaust pipe 12, and the air exhaust device 13 is an exhaust fan.
As shown in fig. 4, the wall of the heating tube 11 is composed of an insulating layer 11-1, a heater 11-2 and a heat conducting layer 11-3, wherein the insulating layer 11-1 is an outer side wall; the heat conduction layer 11-3 is an inner wall side; the heater 11-2 is arranged between the heat insulation layer and the heat conduction layer.
During normal production, the thickness air cooling system is formed by the air collecting pipe 6, the first connecting hose 4 and the blowing pipe 2; at the moment, the hot blast pipe flowmeter and the flowmeter for air draft are in a closed state, and the second connecting hose 9 and the third connecting hose 10 do not have air flow and are not connected with the blowpipe 2;
in the production of glass substrates, the thickness of products is required to be controlled within a certain positive and negative limit range, and the thickness of the products is generally adjusted by adjusting the cooling air volume of a cooling air pipe corresponding to the thickness distribution of the products, but various abnormal conditions can occur in the production, and the purpose of process adjustment cannot be achieved by singly depending on the cooling air. The thickness wind process adjusting system expands process adjusting means and methods by adding hot wind and an air draft device, optimizes through different combination adjustments, and maintains the glass thickness within the minimum fluctuation range as much as possible.
The process tuning method of the system of the present invention is described below in conjunction with several exemplary process tuning approaches.
In the production of the glass substrate, when the thickness of the product is controlled within a certain positive and negative limit range, two adjacent thickness distribution limit regions continuously go up and two adjacent thickness distribution limit regions continuously go down, at the moment, the air inlet corresponding to the thickness distribution limit regions is communicated with the air collecting pipe 6, and the thickness of the product is controlled by adjusting the cooling air volume of the air collecting pipe 6.
As shown in fig. 5, the first thickness distribution limiting region 14-1 and the second thickness distribution limiting region 14-2 are located on the upper center, the third thickness distribution limiting region 14-3 and the fourth thickness distribution limiting region 14-4 are located on the lower center, and at this time, the air inlets corresponding to the first thickness distribution limiting region 14-1, the second thickness distribution limiting region 14-2, the third thickness distribution limiting region 14-3 and the fourth thickness distribution limiting region 14-4 are communicated with the air collecting duct 6.
When the peak value of the thickness distribution limit area of the product exceeds the upper thickness limit deviation 15 and the valley value of the thickness distribution limit area approaches the lower thickness limit deviation 16, the air inlet corresponding to the peak value is communicated with the air collecting pipe 6, and meanwhile, the air inlet corresponding to the valley value is communicated with the exhaust pipe 12.
As shown in fig. 6, the second thickness distribution limiting region 14-2 and the fourth thickness distribution limiting region 14-4 exceed the upper thickness limit deviation 15, and the third thickness distribution limiting region 14-3 approaches the lower thickness limit deviation 16, at which time, and a second air inlet 2-2 and a fourth air inlet 2-4 corresponding to the second thickness distribution limit region 14-2 and the fourth thickness distribution limit region 14-4 are respectively communicated with the air collecting pipe 6, so that the third air inlet 2-3 corresponding to the third thickness distribution limit region 14-3 is communicated with the air exhaust pipe 12 while the cold air flow of the corresponding air collecting pipe is reduced, the operation not only achieves the purpose of adjusting the second thickness distribution limit region 14-2 and the fourth thickness distribution limit region 14-4, but also reduces the influence of the third thickness distribution limit region 14-3.
When the valley value of the thickness distribution limit area of the product exceeds the thickness lower limit deviation 16 and the peak value of the thickness distribution limit area is close to the thickness upper limit deviation 15, the air inlet corresponding to the valley value is communicated with the air collecting pipe 6, the cold air flow of the corresponding air collecting pipe is increased, and meanwhile, the air inlet corresponding to the peak value is communicated with the heating air pipe 11.
As shown in fig. 7, the second thickness distribution limit region 14-2 and the fourth thickness distribution limit region 14-4 approach the upper thickness limit deviation 15, and at the same time, the third thickness distribution limit region 14-3 exceeds the lower thickness limit deviation 16, and then the second air inlet 2-2 and the fourth air inlet 2-4 are communicated with the heating air duct 11, and at the same time, the third air inlet 2-3 is communicated with the air collecting duct 6; so as to achieve the purpose of controlling the thickness fluctuation.
When the limit region of the thickness distribution of the product is located between the upper limit deviation 15 and the lower limit deviation 16 of the thickness, but the wave-shaped fluctuation occurs, the following two cases can be divided:
if the deviation of the peak value is larger than the deviation of the valley value, the air inlet corresponding to the thickness distribution limit area of which the peak value is close to the thickness upper limit deviation 15 is communicated with the hot air pipe 11, and the air inlet corresponding to the thickness distribution limit area of which the valley value is close to the thickness lower limit deviation 16 is communicated with the air collecting pipe 6.
If the deviation of the valley value is larger than the deviation of the peak value, the air inlet corresponding to the thickness distribution limit area of which the valley value is close to the thickness upper limit deviation 15 is communicated with the exhaust pipe 12, and the air inlet corresponding to the thickness distribution limit area of which the peak value is close to the thickness lower limit deviation 16 is communicated with the air collecting pipe 6.
As shown in FIG. 8, the thickness profile 14 is between the upper and lower extreme deviations 15, 16, but with wave-like fluctuations, i.e., the illustrations 14-1, 14-3 are off-center, or 14-2, 14-4 are off-center, in which case if the cooling air operation is performed alone, the thickness profile is further deteriorated by the effect on the thickness at adjacent points. According to the invention, while the cooling air is increased for 14-2 and 14-4, the blowpipes 2-1 and 2-3 corresponding to 14-1 and 14-3 are connected to the hot air device 11 or the air draft device 12, and the optimization adjustment is carried out according to the change condition of the thickness curve 14, so as to achieve the purpose of controlling the thickness of the product.
The above-mentioned several process adjusting methods are typical thickness distribution adjusting methods, but the present invention is not limited to the above-mentioned several cases, and the optimal combination adjustment can be performed according to different situations in the actual production.
Claims (5)
1. An adjusting method of an integrated thickness air adjusting system for glass substrate forming equipment is characterized in that:
the integrated thickness air adjusting system for the glass substrate forming equipment comprises an air collecting pipe (6), a heating air pipe (11) and an exhaust pipe (12), wherein the air collecting pipe (6), the heating air pipe (11) and the exhaust pipe (12) are all connected with an air inlet on the glass substrate forming equipment, and the air collecting pipe (6), the heating air pipe (11) and the exhaust pipe (12) are alternately used according to the production process requirements;
when the peak value of the thickness distribution limit area of the product exceeds the upper thickness limit deviation (15) and the valley value of the thickness distribution limit area approaches the lower thickness limit deviation (16), the air inlet of the thickness distribution limit area corresponding to the peak value is communicated with the air collecting pipe (6), and the air inlet corresponding to the valley value is communicated with the air exhaust pipe (12);
when the valley value of the thickness distribution limit area of the product exceeds the thickness lower limit deviation (16) and the peak value of the thickness distribution limit area approaches the thickness upper limit deviation (15), the air inlet corresponding to the valley value is communicated with the air collecting pipe (6), and meanwhile, the air inlet corresponding to the peak value is communicated with the heating air pipe (11);
when the thickness distribution limit area of the product is arranged between the upper thickness limit deviation (15) and the lower thickness limit deviation (16) and is in a wave shape, then:
if the deviation of the peak value is larger than the deviation of the valley value, the air inlet corresponding to the thickness distribution limit area corresponding to the peak value is communicated with the heating air pipe (11), and meanwhile, the air inlet corresponding to the thickness distribution limit area corresponding to the valley value is communicated with the air collecting pipe (6);
if the deviation of the valley value is larger than that of the peak value, the air inlet corresponding to the thickness distribution limit area corresponding to the valley value is communicated with the exhaust pipe (12), and the air inlet corresponding to the thickness distribution limit area corresponding to the peak value is communicated with the air collecting pipe (6).
2. The adjusting method of the integrated thickness wind adjusting system for a glass substrate forming apparatus according to claim 1, wherein: the air collecting pipe (6) is connected with the air inlet through a first connecting hose (4), the heating air pipe (11) through a second connecting hose (9) and the exhaust pipe (12) through a third connecting hose (10).
3. The adjusting method of the integrated thickness wind adjusting system for a glass substrate forming apparatus according to claim 1, wherein: the air collecting pipe (6) is provided with a first flowmeter (5), the heating air pipe (11) is provided with a second flowmeter (7), and the exhaust pipe (12) is provided with a third flowmeter (8).
4. The adjusting method of the integrated thickness wind adjusting system for a glass substrate forming apparatus according to claim 1, wherein: one end of the exhaust pipe (12) is an open end, and the other end is a closed end; an air draft device (13) is arranged at the opening end of the air draft pipe (12).
5. The adjusting method of the integrated thickness wind adjusting system for a glass substrate forming apparatus according to claim 1, wherein: the wall of the heating air pipe (11) is composed of an insulating layer (11-1), a heater (11-2) and a heat conduction layer (11-3), wherein the insulating layer (11-1) is arranged as an outer wall, the heat conduction layer (11-3) is arranged as an inner wall, and the heater (11-2) is arranged between the insulating layer and the heat conduction layer.
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| CN201711176339.7A CN108101345B (en) | 2017-11-22 | 2017-11-22 | Integrated thickness air adjusting system and method for glass substrate forming equipment |
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| CN201711176339.7A CN108101345B (en) | 2017-11-22 | 2017-11-22 | Integrated thickness air adjusting system and method for glass substrate forming equipment |
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| CN112537902A (en) * | 2020-11-30 | 2021-03-23 | 彩虹显示器件股份有限公司 | Device and method for controlling thickness air flow of glass forming area |
| CN113045184B (en) * | 2021-01-29 | 2023-03-21 | 彩虹显示器件股份有限公司 | Method for precisely adjusting manufacturing thickness of glass substrate |
| CN115010350B (en) * | 2022-05-30 | 2023-09-22 | 彩虹显示器件股份有限公司 | Device and method for stabilizing production of substrate glass |
| CN116199414B (en) * | 2023-02-20 | 2024-04-26 | 彩虹（合肥）液晶玻璃有限公司 | Flow regulating device for thickness air pipe of liquid crystal substrate glass and working method of flow regulating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3723082A (en) * | 1971-01-06 | 1973-03-27 | Corning Glass Works | Sheet glass thickness control |
| JP3468251B2 (en) * | 1994-12-28 | 2003-11-17 | 日本電気硝子株式会社 | Method and apparatus for manufacturing thin glass plate |
| JPH1059732A (en) * | 1996-08-12 | 1998-03-03 | Nippon Electric Glass Co Ltd | Forming device for sheet glass |
| CN201837906U (en) * | 2010-09-29 | 2011-05-18 | 陕西彩虹电子玻璃有限公司 | Shaping temperature control device for TFT (Thin Film Transistor) glass substrates |
| CN202785974U (en) * | 2012-07-26 | 2013-03-13 | 彩虹显示器件股份有限公司 | Device for improving stripes of glass plate |
| CN202936299U (en) * | 2012-11-30 | 2013-05-15 | 东旭集团有限公司 | Air hose device matched with molding kiln for producing glass plate by overflow method |
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