CN101891374B - Stress control zone - Google Patents
Stress control zone Download PDFInfo
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- CN101891374B CN101891374B CN2009102625783A CN200910262578A CN101891374B CN 101891374 B CN101891374 B CN 101891374B CN 2009102625783 A CN2009102625783 A CN 2009102625783A CN 200910262578 A CN200910262578 A CN 200910262578A CN 101891374 B CN101891374 B CN 101891374B
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- glass
- glass ribbon
- group
- pulling roll
- stress control
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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
- C03B17/067—Forming glass sheets combined with thermal conditioning of the sheets
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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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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention provides a method and a device of controlling a stress in a glass strip (15) formed in a puling-down glass manufacturing method (such as a melting pulling-down method) and controlling the shape of the glass strip. In some embodiments, a stress control area (50) is combined into the pulling method at a position below a first group of pulling rollers (60) and above a second group of pulling rollers (70). The stress control area (50) has a space temperature resolution crosscut with the controlling direction on the glass strip (15); the space temperature resolution is less than or equal to 150 mm. The stress control area (50) can be located in a concreting area (31) of the glass such as at 1/3 of the lower part of the area. By this way, the stress is controlled; simultaneously, the glass strip (15) is not needed to be applied with large energy, thereby reducing the chance of warpage of the glass strip (15) on the pulling direction crosscut direction, such as curtain warpage.
Description
The application requires the right of priority of No. the 61/179097th, the United States Patent (USP) provisional application submitted on May 18th, 2009.
The field
The present invention relates to sheet glass, for example be used as the manufacturing of the sheet glass of substrate in display equipment (as liquid-crystal display (LCD)).More particularly, the present invention relates in drop-down vitrics (as the fusion glass tube down-drawing), stress in the glass ribbon that is used for making described sheet glass and the shape of glass ribbon are controlled, and the method and apparatus to being controlled by the shape of the stress in the sheet glass of described glass ribbon manufacturing and sheet glass.
Background
Display equipment is used to many purposes.For example, Thin Film Transistor-LCD (TFT-LCD) is used to notebook computer, dull and stereotyped both desktop monitors, LCD televisor and internet and communication device etc.
Many display equipments, for example TFT-LCD panel and Organic Light Emitting Diode (OLED) panel is directly upward to make at smooth sheet glass (glass substrate).For faster production speed and reduce costs, the panel manufacturing process can be made a plurality of panels simultaneously on the sub-sheet of single substrate or substrate usually.In the different time points of this technique, along line of cut, described substrate is divided into some small portions.
This cutting operation can change the stress distribution in glass, specifically, when utilization vacuumizes when making glass smooth, can observe in-plane stress and distribute.More particularly, described cutting operation can discharge stress at the line of cut place, makes the cut edge no longer be subject to tractive.This stress relief can cause glass sub-sheets to change by vacuumizing the smooth shape that flattens usually, produces the phenomenon that the display manufacturing person is called " distortion ".Although the degree of change of shape is normally very little, with regard to dot structure used in modern displays, this distortion meeting that is caused by cutting is even as big as producing defective (underproof) indicating meter in a large number.Therefore, the display manufacturing person is concerned about the problem of distortion very much, is strict about the standard of the distortion that can allow that caused by cutting.
Except producing distortion, when sheet glass was cut into sub-sheet, stress (comprising the temporary stress that is frozen in the unrelieved stress in glass and dissipates along with the glass temperature balance as the root of distortion) also can impact the shape of the glass ribbon that is used for making sheet glass.And the shape of glass ribbon can impact the technique of sheet glass separation and so on.Specifically, the shape of glass ribbon can affect simultaneously the line of glass ribbon and separate independently sheet glass from glass ribbon subsequently, also can affect the movement of glass ribbon in scratching process.
In view of above problem, people have carried out a lot of effort, are devoted in drop-down vitrics, to controlling for the manufacture of the shape of the stress in the glass ribbon of sheet glass and glass ribbon.The invention provides to reduce the method and apparatus of the negative impact of undesirable stress and shape in the finished glass plate of making to glass ribbon and by glass ribbon.
Summary of the invention
According to first aspect, disclosed and a kind ofly made glass ribbon (15), be used for making the equipment of sheet glass (13) by glass tube down-drawing, described equipment comprises:
(a) first group of pulling roll (60), it contacts described glass ribbon (15) in described equipment use procedure;
(b) second group of pulling roll (70), it contacts glass ribbon (15) in described equipment use procedure, and described second group of pulling roll (70) is arranged on below described first group of pulling roll (60);
(c) stress control zone (50), in described equipment use procedure, described glass ribbon (15) passes through from this stress control zone, described stress control zone (50) is positioned at first group of pulling roll and second group of pulling roll (60,70) between, have the room temps resolving power with the direction of draw cross-web direction on glass ribbon (15), this room temps resolving power is less than or equal to 150 millimeters.
According to second aspect, disclosed a kind of equipment, it comprises heating unit (51), described heating unit divides two rows to arrange, has slit (55) between two rows, this slit is used for receiving glass ribbon (15), and described equipment has the room temps resolving power with the direction of draw cross-web direction on glass ribbon (15), and this room temps resolving power is less than or equal to 150 millimeters.
According to the 3rd aspect, disclosed a kind of method that is used for making sheet glass, described method comprises:
(A) use drawing to make glass ribbon (15),
(B) from described glass ribbon (15) cutting glass plate (13);
Described glass ribbon (15) is by stress control zone (50), and described district has the room temps resolving power with the direction of draw cross-web direction on glass ribbon (15), and this room temps resolving power is less than or equal to 150 millimeters.
The reference numerals of using in the general introduction to each aspect of the present invention is not used for limiting the scope of the invention just for helping reader, and should not be understood to limitation of the scope of the invention yet.Generally speaking, should understand foregoing general description and the following detailed description is all to example of the present invention, is used to provide overall commentary or the framework of understanding character of the present invention and characteristic.
Supplementary features of the present invention and advantage have been proposed in the following detailed description, for a person skilled in the art, by in described perhaps by understanding according to enforcement the present invention described herein, part of properties wherein and advantage will be apparent.The accompanying drawing that comprises provides further understanding of the invention, and accompanying drawing is incorporated in the present specification and consists of the part of specification sheets.Should be understood that the of the present invention various features that disclose can be with any and all being used in combination in this specification sheets and accompanying drawing.
Description of drawings
Fig. 1 is the front-view schematic diagram according to the fused glass producing apparatus of illustrative embodiments.
Fig. 2 is the schematic side view according to the fused glass producing apparatus of illustrative embodiments.The glass ribbon (not shown) moves downward along the tractive center line between pulling roll.
Fig. 3 is the front-view schematic diagram of an embodiment of the heating unit of stress control zone.
Fig. 4 is the heating unit of stress control zone and the perspective diagram of a kind of embodiment of the equipment that is connected.
Fig. 5 uses four active heating units, the graphic representation of the stress that records in sheet glass in stress control zone.
Fig. 6 uses nine active heating units, the graphic representation of the stress that records in sheet glass in stress control zone.
Fig. 1-3 are not drawn to scale, the relative dimension of parts shown in not representing.The Reference numeral that uses in accompanying drawing is corresponding to lower component:
13 sheet glass (glass substrate)
15 glass ribbons
27 edge rollers
31 glass solidification zone
35 delineation lines
37 overflow grooves (isopipe) namely are used for the shaped structure of drop-down fusion process
Be used for receiving the chamber of melten glass in 39 overflow grooves
41 overflow groove roots
45 viewing windows
50 stress control zones
The heating unit of 51 stress control zones
The electrical lead of the heating unit of 52 stress control zones
53 are used for the supporting frame of heating unit
54 joint bolts
55 are used for the slit of glass ribbon
60 first groups of pulling roll
70 second groups of pulling roll
80,90 other pulling roll groups
Preferred implementation
Be below the discussion about fusion glass tube down-drawing (being also referred to as fusion process, overflow downdraw or press over system), be to be understood that described herein and method and apparatus institute's prescription also can be used for other glass tube down-drawing, for example slot draw.Fusing apparatus is known in the art, and the present invention has omitted it and described in detail, in order to avoid obscure the description of illustrative embodiments.
As shown in Figure 1, conventional fusion process is used shaped structure (overflow groove) 37, and it is the 39 interior melten glass (not shown)s of accepting in the chamber.Described overflow groove comprises root 41, combines at described root from two of the overflow groove melten glass of assembling the side, forms glass ribbon 15.After glass ribbon left root, at first it passed edge rollers 27, then passes first group of pulling roll 60.When glass ribbon moved down in traction process, glass was shown as 31 by solidification zone in Fig. 1.Known in the art, at the temperature higher than solidification zone, glass shows as viscous liquid basically.At the temperature lower than solidification zone, glass shows as the elastic-like solid basically.In solidification zone by high temperature cooling the time, it can not show by the sharply variation of viscosity to elastic property when glass.On the contrary, the viscosity of glass increases gradually, and through showing simultaneously the visco-elasticity zone of significant viscosity and elastic property, final character shows as Hookean body.
Glass can cause viscosity to increase from high temperature to subcooling, can cause stress relaxation.Suppose that the glass material initial temperature is T
0, CR is cooling with steady rate.Temperature-function of time can represent with following formula:
T(t)＝T
0-CR·t
At t=0 constantly, glass is applied very little instantaneous shear strain γ.Need specific shear-stress σ to keep described strain.In general, stress can reduce in time, unless temperature T
0Very low.For greater than moment of 0, shear the relaxation modulus and can be defined as follows:
If strain is very little, shear-stress is linear relevant to shear strain, and described modulus and strain are irrelevant.Along with the time lapse in process of cooling, G (t; T
0, CR) usually can be because stress relaxation reduces.If T
0Very high and CR is very little, G (t; T
0, CR) can decay to rapidly zero.If T
0Very low or CR is very large, G (t; T
0, CR) may not can significantly decay.In situation arbitrarily, long-time, modulus G (t; T
0, CR) can be near asymptotic value G (∞; T
0, CR).
Stress relaxation is than F (T
0, CR) be defined as follows:
In high initial temperature or Slow cooling situation, F is near 0.In low initial temperature or quick cooling situation, F is near 1.According to above definition about the stress relaxation ratio, solidification zone is defined as follows:
Suppose that rate of cooling is CR:
T
95=T
0Make F (T
0, CR)=0.95
T
05=T
0Make F (T
0, CR)=0.05
Solidification zone is T
95-T
05The humidity province.
In Fig. 1, the position contact glass ribbon 15 of edge rollers 27 above solidification zone, and first group of pulling roll 60 is positioned at solidification zone.According to application, within second group of pulling roll 70 is positioned at solidification zone or below.As shown in Figure 2, if necessary, can also use other pulling roll group 80 and 90.The temperature of edge rollers is lower than the temperature of glass, and for example, described edge rollers is water cooling or air cooled.Because the edge rollers temperature is lower, it can the local temperature that reduces glass.Thisly coolingly can reduce attenuating of glass ribbon, namely described Local cooling helps to control reduce (for example the effect by pulling roll makes width reduce) of the glass ribbon width that occurs in pulling process.Described pulling roll typical temperature is also lower than the glass of its contact, but because pulling roll is positioned at drawing process position more on the lower, so the difference of temperature can be less than the edge rollers place.
According to some embodiment, the position below first group of pulling roll 60, above second group of pulling roll 70 is incorporated into stress control zone 50 (stress control assembly) in drawing process.As shown in Figure 1, the distance of described stress control zone and first group of pulling roll can be less than the distance of itself and second group of pulling roll.In some embodiments, within described stress control zone is positioned at solidification zone, for example be positioned at 1/3rd places, bottom of solidification zone, but if necessary, also can be positioned at other position.
Described stress control zone can provide the temperature with on the direction of draw cross-web direction to a certain degree to control (across-the-draw temperature control), and this is that conventional drawing can't be completed.Quantitatively, described stress control zone be provided at the direction of draw cross-web direction on room temps resolving power be less than or equal to 150 millimeters (approximately 6 inches), for example spatial resolution is about 75-125 millimeter (approximately 3-5 inch).In this article, the room temps resolving power of stress control zone represent temperature can change substantially independently of each other (namely the temperature variation of a point to the temperature variation that another point causes mostly be most ± 10%) 2 between minimum horizontal distance, described two points are positioned on the mass fraction of glass ribbon, namely finally can become the part of sheet glass (glass substrate).Wherein, can control stress in glass ribbon by the size of room temps resolving power, thereby reduce the distortion in glass substrate when cutting into sub-sheet (seeing above).
Fig. 3 is the schematic diagram of a kind of embodiment of stress control zone, shows in figure that heating unit 51 with a plurality of close space lengths obtains described that can control the stress in glass ribbon and the room temps resolving power draw direction cross-web direction.Although the purpose of having controlled for bulk temperature before this is used for fusion machinery with heating unit (coil), but these coils with the direction of draw direction traversed by on spacing wide, meticulous room temps resolving power can't be provided enough on the surface of glass ribbon, be not enough to effectively control the stress in glass ribbon.And the spacing between coil and glass ribbon surface is excessive, can't be used for this purpose.
According to the present invention, utilize heating unit along and the spacing (being the distance of center to center between adjacent elements) of draw direction cross-web direction and the spacing (being the distance that glass takes heating unit to) between heating unit and glass ribbon be less than or equal 150 millimeters with the draw direction cross-web direction on room temps resolving power.For the ease of making, for all heating units, the physical separation between adjacent heating unit normally equates.But, if necessary, spacing is changed.Therefore, in the present invention, the spacing between described heating unit is the mean value of spacing of the center to center of all elements of using in stress control zone.
Similarly, for all elements, the spacing from the heating unit to the glass ribbon normally equates, but if necessary, and a part of or whole elements also can have different and spacing glass ribbon.For example, consider the special part of special machine, the spacing of glass ribbon one side can be different from the spacing of opposite side, perhaps can be different near another edge spacing near the spacing at a glass ribbon edge.Therefore, in the present invention, the spacing of described heating unit and glass ribbon is all elements of using in stress control zone and the mean value of the spacing between glass ribbon.The adjusting of these spacings can cause the variation of all spacings usually of equal valuely; for example by will whole a collection of element towards close or away from the position movement of glass ribbon, the stress control zone equipment that perhaps will have particular element-glass ribbon spacing replaces with the distinct device with different elements-glass ribbon spacing.Perhaps, if necessary, can also regulate the independent spacing of a part of or all elements.
Described two kinds of spacings, i.e. spacing between spacing between element and element and glass ribbon, wherein the spacing between element is usually significantly less than the spacing between element and glass ribbon.For example, in one embodiment, the spacing between described element is less than or equal to 50 millimeters (approximately 2 inches), for example be about 30 millimeters (approximately 1 inches), and the spacing between element and glass ribbon is 50-200 millimeter (approximately 2-8 inch).In another embodiment, for the spacing between similar element, the spacing between described element and glass ribbon is 0.5-1.5 times of immediate pulling roll diameter.As reference, conventional pulling roll diameter is 120-150 millimeter (approximately 5-6 inch).Should be noted that the roller that does not usually have pulling roll or other kind in the spacing between described heating unit and glass ribbon, the temperature of glass ribbon is carried out the ability of local influence in order to avoid affect independent element.
Can use the various combinations of spacing and element and glass ribbon spacing between element in stress control zone.In some embodiments, these spacings are selected, make the variation of 1 watt of the every generation of electric energy that flows to heating unit independently, all can cause the STRESS VARIATION of at least 3.5 kPas (approximately 0.5psi) in representative sheet glass at least one zone under the glass ribbon cutting.In other embodiment, described spacing can make stress that the variation of at least 7 kPas (approximately 1psi) occurs.
Heating unit in stress control zone can be comprised of various materials, can have various configurations.For example, wire or bar-shaped high temperature material can be used for this purpose.Fig. 4 shows that use iron/chromium/aluminium high temperature wires forms a kind of embodiment of heating unit 51.Provide electric current by 52 pairs of elements of wire, for the element of independent element or one group series connection provides electric current (middle the heating unit that will power separately and the element of powering in the end in groups compare).According to installation specification, series-fed can be adjacent with heating unit or non-conterminous.Element is arranged in heat-resisting frame 53, and heat-resisting frame draws in machinery in position with for example bolt 54 in fusion.Can use thermal insulation material (aluminum oxide thermal insulation material for example; Demonstration in figure) calorific loss of proof stress control region.In use, glass ribbon is by slit 55, for example the middle part by slit.
The length of frame 53 depends on the width of glass ribbon.Common described length is slightly larger than the width of glass ribbon, but if necessary, the length of stress control zone can be less than the width of glass ribbon.In one embodiment, the height of frame 53 is 125-150 millimeter (approximately 5-6 inch), and described heating unit 51 is slightly short.For example, the center line average of described heating unit can be 50-100 millimeter (approximately 2-4 inch), for example approximately 75 millimeters (approximately 3 inches).If necessary, described frame and heating unit can be higher, in the case, if necessary, can form viewing window at the end sections of frame 53.(perhaps, as shown in Figure 2, can provide the some of one or more viewing windows 45 as the pulling roll assembly.) height may need very little element and the spacing between glass ribbon less than the heating unit of 50 millimeters (approximately 2 inches), therefore may be unsuitable for great majority and use.
The degree of depth of frame depends on the spacing between element and glass ribbon.In some embodiments, the degree of depth of frame is about three times of height of frame.When should be noted that the middle part of the slit by stress control zone when glass ribbon, the twice that the degree of depth of slit will equal the spacing of element and glass ribbon adds the thickness of upper glass.For thin glass, for example thickness is equal to or less than the glass of 0.7 millimeter, and this is the thickness of LCD and OLED glass routine, and the described degree of depth is substantially equal to the twice of element and glass ribbon spacing, for example 100-400 millimeter (approximately 4-16 inch).
From above can obviously finding out, draw the overall dimensions of machinery from fusion, the overall dimension of stress control zone is suitable, this helps structure and the installation of stress control zone.
An important advantage of service stress control region is, it can reduce (can eliminate in some embodiments) fusion and draw the needs that mechanical other parts counter stress is controlled.Specifically, the needs that in this aspect of vitrics, the part counter stress of stress control zone top is controlled can significantly reduce.Described other part location is not good, and proof stress, this means with respect to stress control zone well, need to apply more energy (heat energy) to glass ribbon.And more energy can reduce in glass ribbon with the draw direction cross-web direction on tension force, make glass ribbon easily with the draw direction cross-web direction on warpage occurs, specifically, can produce the curtain warpage, wherein the surface of glass ribbon can become the shape of the curtain transversal wave movement fluctuating of similar vertical hanging.By the stress control zone is arranged in solidification zone, be 1/3rd places, solidification zone middle and lower part, can control by counter stress, and do not need to glass ribbon to apply a large amount of energy, reduced thus glass ribbon and formed the chance of warpage (for example curtain warpage) with the draw direction cross-web direction.
Except can reduce with the possibility that draws reverse cross-web direction and produce warpage, described stress control zone also can be to not causing negative impact along the downward temperature curve of draw direction, this is because less to the energy that glass ribbon provides at stress control zone equally.This has further reduced the possibility that produces warpage, this is because also can produce warpage along the downward temperature curve of draw direction, by making described temperature curve substantially constant, the system that warpage is controlled before introducing stress control zone can not lose control to warpage owing to introducing described control region.
Following non-limiting example for example understands the concrete application of stress control zone of the present invention.
Embodiment
This embodiment understands that for example stress control zone can be used for reducing the unrelieved stress in the sheet glass that uses fusion to draw machinofacture.Specifically, situation (Fig. 6 of the situation of the stress that produces (Fig. 5, comparative example) stress that produces when using nine active heating units when this embodiment will use four active heating units; Test case) compare.Stress control zone is as mentioned about the described structure of Fig. 4, is positioned at 1/3rd places, bottom of first group of pulling roll below that fusion draws machinery, second group of pulling roll top (being between the pulling roll 60 and 70 of Fig. 1) solidification zone.
In Fig. 5 and 6, along the independent heating unit of the numeral stress control zone of transverse axis, the triangle number strong point of transverse axis top represents energy that independent coil is applied.The stress that records in the representative sheet glass that power distribution shown in demonstration use triangle number strong point, square number strong point obtains.In each figure, solid data points is presented at the stress that the top of sheet glass records, and hollow data points is illustrated in the stress that the sheet glass bottom records.Sea line represents zero stress, and point above the horizon represents the normal stress value, and the point of below represents the stress value born.Use conventional birefringence technique to measure stress.
In Fig. 5, only to heating unit 27,28,42 and 43 provide electric current, and element 27 and 28 operates under the power of about 90 watts/element, and element 42 and 43 operates under the power of about 35 watts/element.In Fig. 6, element 24-30 and element 42 and 43 are active, element 42 and 43 is also to operate under the power of about 35 watts/element, and element 27 and 28 is also to operate under the power of about 90 watts/element, and remaining element 24-30 operates under the power of about 50 watts/element.
These figure have shown that most clearly stress control zone reduces the effect of unrelieved stress.In Fig. 5, the most heavily stressedly be about 900 kPas (approximately 130psi), and in Fig. 6, the most heavily stressedly be reduced to about 480 kPas (approximately 70psi), that is, reduce to surpass 45%.In addition, the stress curve of Fig. 6 is more smooth than the stress curve of Fig. 5, and this uses for great majority is also an advantage.In addition, in the zone that heating unit does not start, maximum stress has appearred in Fig. 6.By starting the element in this zone, can obtain even lower maximum stress value and more smooth general curve.
Therefore, the present invention includes but be not limited to following aspect and embodiment:
C1. make glass ribbon, be used for making the equipment of sheet glass by glass tube down-drawing for one kind, this equipment comprises:
(a) first group of pulling roll, it contacts described glass ribbon in described equipment use procedure;
(b) second group of pulling roll, it contacts glass ribbon in described equipment use procedure, and described second group of pulling roll is arranged on below described first group of pulling roll;
(c) stress control zone, in described equipment use procedure, described glass ribbon passes through from this stress control zone, described stress control zone is between first group of pulling roll and second group of pulling roll, have the room temps resolving power with the direction of draw cross-web direction on glass ribbon, this room temps resolving power is less than or equal to 150 millimeters.
C2. equipment as described in C1, wherein said stress control zone comprises a plurality of heating units.
C3. equipment as described in C2, wherein in the use procedure of described equipment, a plurality of heating units extend beyond the edge of glass ribbon.
C4. as C2 or the described equipment of C3, wherein said a plurality of heating units form a slit, and in the use procedure of described equipment, glass ribbon passes through from described slit.
C5. as C2, the described equipment of C3 or C4, the average headway between the Center-to-Center of wherein said heating unit are less than or equal to 50 millimeters.
C6. as C2, C3, the described equipment of C4 or C5, wherein in described equipment use procedure, the average headway between described heating unit and described glass ribbon surface is the 50-200 millimeter.
C7. as C2, C3, C4, the described equipment of C5 or C6, wherein, in the use procedure of described equipment, the average headway between described heating unit and glass ribbon surface is near the 0.5-1.5 of the diameter of the pulling roll of stress control zone the most doubly.
C8. as C2, C3, C4, C5, the described equipment of C6 or C7, wherein, the center line average of described heating unit is the 50-100 millimeter.
C9. equipment as described in any one in aforementioned C1-C8, wherein, the distance of described stress control zone and first group of pulling roll is less than the distance of itself and second group of pulling roll.
C10. equipment as described in any one in aforementioned C1-C9, wherein, in described stress control zone on glass ribbon with the draw direction cross-web direction on room temps resolving power be the 75-125 millimeter.
C11. equipment, it comprises a plurality of heating units, described heating unit divides two rows to arrange, has slit between two rows, this slit is used for receiving glass ribbon, described equipment has the room temps resolving power with the direction of draw cross-web direction on glass ribbon, this room temps resolving power is less than or equal to 150 millimeters.
C12. equipment as described in C11, wherein, the center line average of described heating unit is the 50-100 millimeter.
C13. as C11 or the described equipment of C12, the spacing between the Center-to-Center of wherein said heating unit is less than or equal to 50 millimeters.
C14. as C11, the described equipment of C12 or C13, wherein, the degree of depth of described slit is the 100-400 millimeter.
C15. as C11, C12, the described equipment of C13 or C14 is characterized in that, described equipment on glass ribbon with the draw direction cross-web direction on room temps resolving power be the 75-125 millimeter.
C16. method that is used for making sheet glass, the method comprises:
(A) use drawing to make glass ribbon,
(B) from the glass ribbon cutting glass plate;
Described glass ribbon is by stress control zone, and described district has the room temps resolving power with the direction of draw cross-web direction on glass ribbon, and this room temps resolving power is less than or equal to 150 millimeters.
C17. method as described in C16, wherein, in described stress control zone on glass ribbon with the draw direction cross-web direction on room temps resolving power be the 75-125 millimeter.
C18. as C16 or the described method of C17, wherein said stress control zone comprises a plurality of heating units, described a plurality of heating unit arranges in some way, make at least one heating unit, the variation of every 1 watt of the energy of carrying to heating unit can make the variation of at least 3.5 kPas of stress generations at least one zone from the lower sheet glass of glass ribbon cutting.
C19. as C16, the described method of C17 or C18, wherein, described stress control zone is in the glass solidification zone.
C20. method as described in C19, wherein said stress control zone is within the bottom 1/3rd of the solidification zone of glass.
By the content that this paper discloses, will be apparent for a person skilled in the art in lower without departing from the spirit and scope of the present invention various other modifications of making.The purpose of following claims is to cover the embodiment and this class that propose herein to revise, change and be equal to item.
Claims (10)
1. make glass ribbon, be used for making the equipment of sheet glass by glass tube down-drawing for one kind, this equipment comprises:
(a) first group of pulling roll, it contacts described glass ribbon in described equipment use procedure;
(b) second group of pulling roll, it contacts glass ribbon in described equipment use procedure, and described second group of pulling roll is arranged on below described first group of pulling roll;
(c) stress control zone, in described equipment use procedure, described glass ribbon passes through from this stress control zone, and the feature of described stress control zone is that (i) comprises a plurality of heating units; (ii) between first group of pulling roll and second group of pulling roll; (iii) has room temps resolving power with the direction of draw cross-web direction on glass ribbon, this room temps resolving power is less than or equal to 150 millimeters, the temperature variation that described room temps resolving power is a point mostly is ± minimum horizontal distance between 10% 2 temperature variation that another point causes most, and described two points are positioned at the part that finally can become sheet glass on glass ribbon.
2. equipment as claimed in claim 1, is characterized in that, in the use procedure of described equipment, a plurality of heating units extend beyond the edge of glass ribbon.
3. equipment as claimed in claim 1 or 2, is characterized in that, the average headway between the Center-to-Center of described heating unit is less than or equal to 50 millimeters.
4. equipment as claimed in claim 1 or 2, is characterized in that, in the use procedure of described equipment, the average headway between described heating unit and glass ribbon surface is near the 0.5-1.5 of the diameter of the pulling roll of stress control zone the most doubly.
5. equipment as claimed in claim 1 or 2, is characterized in that, the distance of described stress control zone and first group of pulling roll is less than the distance of this stress control zone and second group of pulling roll.
6. one kind is used for making by glass tube down-drawing the method for sheet glass, and the method comprises:
(A) use drawing to make glass ribbon,
(B) from the glass ribbon cutting glass plate;
Described glass ribbon is by stress control zone, and the feature of described stress control zone is that (i) comprises a plurality of heating units; (ii) between first group of pulling roll and second group of pulling roll, described first group of pulling roll contacts described glass ribbon with second group of pulling roll in described equipment use procedure, and described second group of pulling roll is arranged on described first group of pulling roll below; (iii) have room temps resolving power with the direction of draw cross-web direction on glass ribbon, this room temps resolving power is less than or equal to 150 millimeters.
7. method as claimed in claim 6, is characterized in that, in described stress control zone on glass ribbon with the draw direction cross-web direction on room temps resolving power be the 75-125 millimeter.
8. method as described in claim 6 or 7, it is characterized in that, for at least one in heating unit, the variation of every 1 watt of the energy of carrying to this heating unit can make the variation of at least 3.5 kPas of stress generations at least one zone from the lower sheet glass of glass ribbon cutting.
9. method as described in claim 6 or 7, is characterized in that, described stress control zone is in the glass solidification zone, and wherein said glass solidification zone is T
95-T
05The humidity province, T in formula
95Be F (T
0, the temperature T of CR)=0.95 o'clock
0, and T
05Be F (T
0, the temperature T of CR)=0.05 o'clock
0, CR is glass cools speed, and F (T
0, CR) be defined as follows:
G (t in formula; T
0, CR) defined by following formula:
σ in formula (t) is the medium and small required shear-stress of instantaneous shear strain γ of maintenance glass, G (∞ when being t; T
0, CR) be G (t when long-time; T
0, asymptotic value CR), and G (0; T
0, the G (t when CR) being t=0; T
0, CR).
10. method as claimed in claim 9, is characterized in that, described stress control zone is within the bottom 1/3rd of the solidification zone of glass.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17909709P | 2009-05-18 | 2009-05-18 | |
| US61/179,097 | 2009-05-18 |
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| Publication Number | Publication Date |
|---|---|
| CN101891374A CN101891374A (en) | 2010-11-24 |
| CN101891374B true CN101891374B (en) | 2013-06-12 |
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| CN2009102625783A Active CN101891374B (en) | 2009-05-18 | 2009-12-23 | Stress control zone |
| CN2009203534448U Expired - Lifetime CN201777976U (en) | 2009-05-18 | 2009-12-23 | Equipment for manufacturing glass plate in down-draw method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009203534448U Expired - Lifetime CN201777976U (en) | 2009-05-18 | 2009-12-23 | Equipment for manufacturing glass plate in down-draw method |
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| Country | Link |
|---|---|
| JP (1) | JP5611572B2 (en) |
| KR (1) | KR101662840B1 (en) |
| CN (2) | CN101891374B (en) |
| TW (1) | TWI410379B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5611572B2 (en) * | 2009-05-18 | 2014-10-22 | コーニング インコーポレイテッド | Stress control area |
| KR101497251B1 (en) * | 2011-03-30 | 2015-02-27 | 아반스트레이트 가부시키가이샤 | Method and apparatus for making glass sheet |
| KR101927543B1 (en) | 2011-03-31 | 2018-12-10 | 아반스트레이트 가부시키가이샤 | Glass plate production method |
| US8459062B2 (en) * | 2011-09-27 | 2013-06-11 | Corning Incorporated | Apparatus and methods for producing a glass ribbon |
| EP2922792B1 (en) | 2012-11-26 | 2017-04-19 | Corning Incorporated | Thermal control of the bead portion of a glass ribbon |
| US9290403B2 (en) | 2013-02-25 | 2016-03-22 | Corning Incorporated | Repositionable heater assemblies for glass production lines and methods of managing temperature of glass in production lines |
| CN105764862A (en) * | 2013-11-26 | 2016-07-13 | 康宁股份有限公司 | Glass manufacturing apparatus and methods of fabricating glass ribbon |
| KR20170031165A (en) * | 2014-07-10 | 2017-03-20 | 코닝 인코포레이티드 | Glass ribbon manufacturing apparatus and methods |
| JP6582682B2 (en) * | 2015-07-28 | 2019-10-02 | 日本電気硝子株式会社 | Glass article manufacturing apparatus and glass article manufacturing method |
| CN108249743B (en) * | 2018-03-28 | 2021-02-23 | 河北省沙河玻璃技术研究院 | Shaping method suitable for drawing flexible glass |
| JP2023531448A (en) * | 2020-06-19 | 2023-07-24 | コーニング インコーポレイテッド | Glass ribbon manufacturing method |
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| CN1902045A (en) * | 2003-11-28 | 2007-01-24 | 康宁股份有限公司 | Method of fabricating low-warp flat glass |
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| CN101336366A (en) * | 2005-12-20 | 2008-12-31 | 康宁股份有限公司 | Method and apparatus for characterizing a glass ribbon |
| CN201777976U (en) * | 2009-05-18 | 2011-03-30 | 康宁股份有限公司 | Equipment for manufacturing glass plate in down-draw method |
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| JPH02307833A (en) * | 1989-05-19 | 1990-12-21 | Nippon Sheet Glass Co Ltd | Heating of plate glass for laminated glass |
| JP3586142B2 (en) * | 1999-07-22 | 2004-11-10 | エヌエッチ・テクノグラス株式会社 | Glass plate manufacturing method, glass plate manufacturing apparatus, and liquid crystal device |
| JP4821260B2 (en) * | 2005-10-20 | 2011-11-24 | 日本電気硝子株式会社 | Liquid crystal plate glass heating apparatus, liquid crystal plate glass furnace, and liquid crystal plate glass manufacturing method |
| JP5076443B2 (en) * | 2006-10-24 | 2012-11-21 | 日本電気硝子株式会社 | Glass ribbon manufacturing apparatus and manufacturing method thereof |
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2009
- 2009-11-25 JP JP2009267316A patent/JP5611572B2/en active Active
- 2009-11-27 TW TW098140738A patent/TWI410379B/en active
- 2009-12-23 CN CN2009102625783A patent/CN101891374B/en active Active
- 2009-12-23 CN CN2009203534448U patent/CN201777976U/en not_active Expired - Lifetime
- 2009-12-31 KR KR1020090136033A patent/KR101662840B1/en active IP Right Grant
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|---|---|---|---|---|
| CN1902045A (en) * | 2003-11-28 | 2007-01-24 | 康宁股份有限公司 | Method of fabricating low-warp flat glass |
| CN101312918A (en) * | 2005-09-22 | 2008-11-26 | 康宁股份有限公司 | Methods of fabricating flat glass with low levels of warp |
| CN101336366A (en) * | 2005-12-20 | 2008-12-31 | 康宁股份有限公司 | Method and apparatus for characterizing a glass ribbon |
| WO2008036227A1 (en) * | 2006-09-20 | 2008-03-27 | Corning Incorporated | Temperature compensation for shape-induced in-plane stresses in glass substrates |
| CN101125727A (en) * | 2007-07-19 | 2008-02-20 | 同济大学 | Ultra-thin flat plate glass ligula die clearance diffluence method pull-down forming device |
| CN201777976U (en) * | 2009-05-18 | 2011-03-30 | 康宁股份有限公司 | Equipment for manufacturing glass plate in down-draw method |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201041813A (en) | 2010-12-01 |
| KR20100124197A (en) | 2010-11-26 |
| JP5611572B2 (en) | 2014-10-22 |
| CN101891374A (en) | 2010-11-24 |
| CN201777976U (en) | 2011-03-30 |
| JP2010265162A (en) | 2010-11-25 |
| TWI410379B (en) | 2013-10-01 |
| KR101662840B1 (en) | 2016-10-05 |
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