CN113087366B - Gas expansion forming method for ultrathin glass - Google Patents
Gas expansion forming method for ultrathin glass Download PDFInfo
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- CN113087366B CN113087366B CN202110372121.9A CN202110372121A CN113087366B CN 113087366 B CN113087366 B CN 113087366B CN 202110372121 A CN202110372121 A CN 202110372121A CN 113087366 B CN113087366 B CN 113087366B
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B21/00—Severing glass sheets, tubes or rods while still plastic
- C03B21/02—Severing glass sheets, tubes or rods while still plastic by cutting
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses an ultra-thin glass ballooning forming method, relates to the technical field of glass preparation, and solves the problems that the glass is difficult to homogenize and lift effectively in an ultra-thin manner in the existing glass preparation process; and in the process of gradually cooling the discharged glass liquid, the glass liquid is in a softened semi-solid state, the hollow annular glass belt is extruded into a glass belt with a cross section in a strip shape by using the state, one side or two sides of the strip-shaped glass belt are cut off before the glass is not completely hardened, the glass belt is changed into a glass plate, and then the glass plate enters an annealing kiln for annealing and cooling to produce a qualified and ultrathin glass substrate.
Description
Technical Field
The invention relates to the technical field of glass preparation, in particular to an ultra-thin glass ballooning forming method.
Background
The ultrathin glass has the characteristics of certain light transmission property and thin thickness, and is widely applied to display panels of mobile phones, tablet computers, liquid crystal televisions and the like, and also widely applied to the fields of microelectronic technology, thin film solar energy and the like.
The existing ultra-thin glass is generally prepared by a float production process or a TFT-glass substrate forming process. However, both of the two conventional glass plate production processes adopt a flat plate method, and the glass is formed into a flat plate; the edges of the glass plates prepared by the flat plate method are thicker than the middle glass strip, and the edges of the glass plates in the later finished product must be removed; in addition, along with glass sheet thickness is more and more thin behind the glass sheet shaping, limit portion thickness receives the liquid surface tension effect, hardly further reduces thickness, and limit portion and the poor multiplying power of middle glass sheet thickness can show and improve, and the shared glass liquid load proportion of limit portion also is more and more big, leads to the product yield to lower and lower.
Therefore, how to research and design an ultra-thin glass ballooning forming method is a problem which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to solve the problems that the glass homogenization difficulty is high and the glass is difficult to effectively and ultra-thinly draw up in the existing glass preparation process, and provides an ultra-thin glass ballooning forming method.
The technical purpose of the invention is realized by the following technical scheme: an ultra-thin glass ballooning forming method comprises the following steps:
s101: outputting the molten glass downwards through an annular outlet to form a hollow annular glass belt;
s102: inserting an inflatable device into the annular glass ribbon, and injecting gas into the annular glass ribbon by the inflatable device for inflatable treatment;
s103: gradually extruding and cooling the inflated annular glass ribbon by a clamping device to form a long-strip-shaped glass ribbon with double-layer gaps distributed;
s104: before the strip-shaped glass strip is not cooled and hardened, cutting two sides of the strip-shaped glass strip through a cutting device to form two flat glass strips;
s105: the air flow discharged from the cutting position of the strip-shaped glass ribbon and the self tension of the flat glass ribbon carry out primary unfolding and flattening on the turned edge of the flat glass ribbon;
s106: the two flat glass belts are divided to two sides by the steering guide device, and the edges of the flat glass belts are flattened for the second time;
s107: and (4) conveying the laterally divided flat glass strips into an annealing kiln through a guide device for annealing and cooling to obtain the ultrathin glass plate.
Further, the flat glass ribbon is subjected to primary edge removing after being unfolded and flattened for the first time, and is subjected to secondary edge removing after being flattened for the second time.
Furthermore, the inflatable device is in a conical shape with the tip arranged downwards, the surface of the inflatable device is provided with at least one air chamber and a plurality of air holes communicated with the air chamber, and the annular glass belt is subjected to non-contact balanced inflatable treatment by the air output by the air chamber through the air holes.
Further, the inflatable device is provided with a plurality of independently controlled air chambers, each air chamber is provided with at least one air hole, and each air chamber independently controls the flow and the pressure of output air so as to control the annular glass belt to be gradually pressed together to form the long-strip-shaped glass belt.
Further, the clamping device comprises at least one first pair of rollers, a second pair of rollers and at least one third pair of rollers;
the first pair of rollers, the second pair of rollers and the third pair of rollers are sequentially arranged at intervals along the output direction of the strip-shaped glass strip, and the first pair of rollers, the second pair of rollers and the third pair of rollers are all distributed on two sides of the strip-shaped glass strip;
the internal spacing of the first pair of rollers is gradually reduced along the output direction of the long-strip-shaped glass ribbon;
the inner spacing of the third pair of rollers is equal.
Further, the first pair of rollers is any one of a non-contact air pressure pair roller, a contact rotating pair roller and a contact static pair roller;
the second pair of rollers is any one of a contact type rotating pair roller and a contact type static pair roller;
the third pair of rollers is any one of a non-contact air pressure pair roller, a contact rotating pair roller and a contact static pair roller.
Furthermore, the first pair of rollers, the second pair of rollers and the third pair of rollers are all in a curved shape matched with the corresponding surface parts of the strip-shaped glass belt, and the curvatures of the first pair of rollers, the second pair of rollers and the third pair of rollers are gradually reduced.
Further, the shearing device is a liquid-cooled cutting knife.
Further, the temperature range when the glass liquid is output is 1500-1650 ℃;
the temperature range when the strip glass is cut off is 650-950 ℃;
the temperature range of the flat glass ribbon when being input into the annealing kiln is 500-650 ℃;
the temperature range of the ultrathin glass plate when the ultrathin glass plate exits the annealing kiln is 80-150 ℃.
Furthermore, the thickness of the ultrathin glass plate ranges from 0.01 mm to 1.5mm, and the width of the ultrathin glass plate is not less than 1000 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the glass liquid of the ultrathin glass gas bulging forming process flows out of the annular discharge hole, is in a hollow cylinder shape, is not influenced by the surface tension of the liquid as a whole, and has consistent thickness on the whole annular surface;
2 in the process of gradually cooling the discharged glass liquid, the glass liquid is in a softened semi-solid state, the hollow annular glass belt is extruded into a glass belt with a strip-shaped cross section by utilizing the state, one side or two sides of the strip-shaped glass belt are cut before the glass is not completely hardened, the glass belt is changed into a glass plate, and then the glass plate enters an annealing kiln for annealing and cooling to produce a qualified and ultrathin glass substrate;
3. the thickness of the edge part of the glass substrate produced by the ultra-thin glass ballooning forming process is basically consistent with that of the middle glass plate, and the yield of the glass substrate is greatly superior to that of a float process and a TFT forming process even if the defect caused by edge part deformation is removed in the later period.
4. The ultra-thin glass gas expansion forming process provided by the invention solves the process problems that ultra-wide large plates are difficult to produce in ultra-high glass production, the glass homogenization difficulty is high, and the glass ultra-thin is pulled up from the production process source, and breaks the technical barrier of TFT glass substrate production at home and abroad.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a flow chart in an embodiment of the invention;
FIG. 2 is a schematic structural view of the integral molding in the embodiment of the present invention;
fig. 3 is a schematic view of an integrally formed internal structure in an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
101. an annular outlet; 102. an inflatable device; 103. a clamping device; 104. a first pair of rollers; 105. a second pair of rollers; 106. a third pair of rollers; 107. a steering guide device; 108. a guide device; 109. a shearing device; 201. an endless glass ribbon; 202. a strip-shaped glass ribbon; 203. a flat glass ribbon.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example (b): an ultra-thin glass ballooning forming method, as shown in fig. 1-3, includes the following steps:
s101: outputting the molten glass downwards through an annular outlet 101 to form a hollow annular glass ribbon 201;
s102: inserting the gas expansion device 102 into the annular glass ribbon 201, and injecting gas into the annular glass ribbon 201 by the gas expansion device 102 for gas expansion treatment;
s103: gradually extruding and cooling the inflated annular glass ribbon 201 by a clamping device 103 to form a strip-shaped glass ribbon 202 with double layers of gaps distributed;
s104: before the strip-shaped glass ribbon 202 is not cooled and hardened, two sides of the strip-shaped glass ribbon 202 are cut off by the cutting device 109 to form two flat glass ribbons 203;
s105: the air flow discharged from the cut-off position of the strip-shaped glass ribbon 202 and the self-tension of the flat glass ribbon 203 carry out primary unfolding and flattening on the turned edge of the flat glass ribbon 203;
s106: the two flat glass strips 203 are divided to two sides by the steering guide device 107, and the edges of the flat glass strips 203 are subjected to secondary flattening treatment;
s107: the laterally divided flat glass ribbon 203 is conveyed to an annealing lehr through a guide 108 to be annealed and cooled, and an ultra-thin glass sheet is obtained.
It should be noted that the downward output of the molten glass may be natural outflow under the action of gravity of the internal molten glass, or extrusion under the action of auxiliary equipment such as a screw, and the output mode is not limited, so that the molten glass is uniformly output along the circumferential direction.
In the present embodiment, the sheet glass ribbon 203 is subjected to the primary edging process after the primary flattening is completed, and is subjected to the secondary edging process after the secondary flattening process is completed.
As shown in fig. 3, the inflatable device 102 is in a cone shape with a downward tip, and the surface of the inflatable device 102 is provided with at least one air chamber and a plurality of air holes communicated with the air chamber, and the annular glass ribbon 201 is subjected to non-contact type balanced inflation treatment by the gas output from the air chamber through the air holes.
It should be noted that, in the present embodiment, the inflation device 102 is disposed coaxially with the annular outlet 101 and is located inside the annular outlet 101.
In this embodiment, the inflation device 102 is provided with a plurality of independently controlled plenums, each configured with at least one gas vent, each independently controlling the flow and pressure of the output gas to control the progressive compaction of the endless glass ribbon 201 into the long glass ribbon 202.
As shown in fig. 2 and 3, the gripping device 103 comprises at least one first pair of rollers 104, a second pair of rollers 105 and at least one third pair of rollers 106. The first pair of rollers 104, the second pair of rollers 105 and the third pair of rollers 106 are sequentially arranged at intervals along the output direction of the elongated glass ribbon 202, and the first pair of rollers 104, the second pair of rollers 105 and the third pair of rollers 106 are all distributed on two sides of the elongated glass ribbon 202; the internal spacing of the first pair of rollers 104 decreases gradually along the direction of the output of the elongated glass ribbon 202; the inner spacing of the third pair of rollers 106 is all equal. In the present embodiment, one first pair of rollers 104, one second pair of rollers 105, and one third pair of rollers 106 are used.
The first pair of rollers 104 is any one of a non-contact pneumatic pair roller, a contact rotary pair roller and a contact static pair roller; the second pair of rollers 105 is any one of a contact type rotating pair roller and a contact type static pair roller; the third pair of rollers 106 is any one of a non-contact pneumatic pair roller, a contact rotary pair roller, and a contact stationary pair roller. In this embodiment, the first pair of rollers 104 is a non-contact pneumatic pair roller, the second pair of rollers 105 is a contact rotary pair roller, and the third pair of rollers 106 is a non-contact pneumatic pair roller.
In a preferred embodiment, the first pair of rolls 104, the second pair of rolls 105, and the third pair of rolls 106 are each curved to match the corresponding surface portion of the elongated glass ribbon 202, and the curvatures of the first pair of rolls 104, the second pair of rolls 105, and the third pair of rolls 106 are gradually reduced.
In this embodiment, the shearing device 109 is a liquid-cooled cutter.
The thickness range of the ultrathin glass plate prepared by the ultrathin glass ballooning forming process is 0.01-1.5mm, and the width is not less than 1000 mm.
The temperature range when the glass liquid is output is 1500-1650 ℃; the temperature range when the strip glass is cut off is 650-950 ℃; the temperature range of the flat glass ribbon 203 when being input into the annealing kiln is 500-650 ℃; the temperature range of the ultrathin glass plate when the ultrathin glass plate exits the annealing kiln is 80-150 ℃. For example, when an ultra-thin glass sheet having a thickness of 0.5mm and a width of 1000mm is produced, the temperature at which the molten glass is discharged is 1534.4 ℃, the temperature at which the long glass strip is sheared is 703 ℃, the temperature at which the flat glass ribbon 203 is introduced into the annealing lehr is 674 ℃, and the temperature at which the ultra-thin glass sheet is discharged from the annealing lehr is 85 ℃. It should be noted that the temperature during the preparation of the ultra-thin glass ballooning molding process changes with the change of the aluminum component, and the higher the aluminum is, the higher the surface hardness of the molded glass is, and the lower the fluidity at the same temperature after melting is.
The working principle is as follows: compared with the prior flaky glass plate, the edge of which is influenced by the surface tension of the liquid, the ultrathin glass bloating forming process has the defects of large edge thickness, more edges and low yield. The annular discharge hole is not provided with a plate edge, and the thickness of the whole annular surface is consistent; in the process of gradually cooling the glass liquid after discharging, the glass liquid is in a softened semi-solid state, and by utilizing the state, the hollow glass belt expands under the action of gas pressure, so that the diameter of the hollow glass belt is increased and then becomes thinner, the thickness becomes uniform, and the stripes formed at the discharging port can be further eliminated. In the process of descending the glass ribbon, the hollow annular glass ribbon 201 is extruded into the glass ribbon with a strip-shaped cross section, one side or two sides of the strip-shaped glass ribbon 202 are cut off before the glass is not completely hardened, the glass ribbon is changed into a glass plate, and then the glass plate enters an annealing kiln for annealing and cooling, so that a qualified and ultrathin glass substrate is produced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The ultra-thin glass ballooning forming method is characterized by comprising the following steps of:
s101: outputting the molten glass downwards through an annular outlet to form a hollow annular glass belt;
s102: inserting an inflatable device into the annular glass ribbon, and injecting gas into the annular glass ribbon by the inflatable device for carrying out inflatable treatment, so that the diameter of the hollow glass ribbon is increased and then is further thinned; the gas expansion device is in a conical shape with the downward tip, the surface of the gas expansion device is provided with a plurality of independently controlled gas chambers and a plurality of gas holes communicated with the gas chambers, and the gas output by the gas chambers through the gas holes is used for carrying out non-contact type balanced gas expansion treatment on the annular glass ribbon;
s103: gradually extruding and cooling the inflated annular glass ribbon by a clamping device, and independently controlling the flow and pressure of output gas by each gas chamber to control the annular glass ribbon to gradually press to form a strip-shaped glass ribbon with double-layer gap distribution; the clamping device comprises a first pair of rollers, a second pair of rollers and a third pair of rollers; the first pair of rollers, the second pair of rollers and the third pair of rollers are sequentially arranged at intervals along the output direction of the strip-shaped glass strip, and the first pair of rollers, the second pair of rollers and the third pair of rollers are all distributed on two sides of the strip-shaped glass strip; the internal spacing of the first pair of rollers is gradually reduced along the output direction of the long-strip-shaped glass ribbon; the internal spacing of the third pairs of rollers is equal; the first pair of rollers, the second pair of rollers and the third pair of rollers are all in a curved shape matched with the corresponding surface parts of the strip-shaped glass strip, and the curvatures of the first pair of rollers, the second pair of rollers and the third pair of rollers are gradually reduced;
s104: before the strip-shaped glass strip is not cooled and hardened, cutting two sides of the strip-shaped glass strip through a cutting device to form two flat glass strips;
s105: the air flow discharged from the cutting position of the strip-shaped glass ribbon and the self tension of the flat glass ribbon carry out primary unfolding and flattening on the turned edge of the flat glass ribbon;
s106: the two flat glass belts are divided to two sides by the steering guide device, and the edges of the flat glass belts are flattened for the second time;
s107: and conveying the laterally divided flat glass strips into an annealing kiln through a guide device for annealing and cooling to obtain the ultrathin glass plate.
2. The ultra-thin glass ballooning form of claim 1 wherein the sheet glass ribbon is subjected to a primary edging process after a primary flattening and a secondary edging process after a secondary flattening process.
3. The ultra-thin glass ballooning tool of claim 1 wherein,
the second pair of rollers is any one of a contact type rotating pair roller and a contact type static pair roller;
the third pair of rollers is any one of a non-contact air pressure pair roller, a contact rotating pair roller and a contact static pair roller.
4. The process of claim 1 wherein said shearing device is a liquid-cooled cutting blade.
5. The method as claimed in any one of claims 1 to 4, wherein the temperature of the glass liquid is between 1500-1650 ℃;
the temperature range when the strip-shaped glass strip is cut off is 650-950 ℃;
the temperature range of the flat glass ribbon when being input into the annealing kiln is 500-650 ℃;
the temperature range of the ultrathin glass plate when the ultrathin glass plate exits the annealing kiln is 80-150 ℃.
6. An ultra-thin glass ballooning form method as claimed in any one of claims 1 to 4, wherein the ultra-thin glass sheet has a thickness in a range of 0.01 to 1.5mm and a width of not less than 1000 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110372121.9A CN113087366B (en) | 2021-04-07 | 2021-04-07 | Gas expansion forming method for ultrathin glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110372121.9A CN113087366B (en) | 2021-04-07 | 2021-04-07 | Gas expansion forming method for ultrathin glass |
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| CN113087366A CN113087366A (en) | 2021-07-09 |
| CN113087366B true CN113087366B (en) | 2022-08-23 |
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| CN114804594B (en) * | 2022-06-29 | 2022-09-23 | 武汉荣佳达光电科技有限公司 | Support plate glass forming device and forming method thereof |
| CN115677184B (en) * | 2022-11-22 | 2024-04-09 | 四川超薄玻璃科技有限公司 | Ultrathin glass forming device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006015223B3 (en) * | 2006-03-30 | 2007-08-30 | Schott Ag | Production of glass tube comprises redrawing glass tube preform with initial profile and recasting of glass tube preform into glass tube with another profile |
| CN111453975A (en) * | 2020-04-28 | 2020-07-28 | 田英良 | Flexible glass forming method and forming device |
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- 2021-04-07 CN CN202110372121.9A patent/CN113087366B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006015223B3 (en) * | 2006-03-30 | 2007-08-30 | Schott Ag | Production of glass tube comprises redrawing glass tube preform with initial profile and recasting of glass tube preform into glass tube with another profile |
| CN111453975A (en) * | 2020-04-28 | 2020-07-28 | 田英良 | Flexible glass forming method and forming device |
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