CN1657453A - Device and drawbench for producing thin glass - Google Patents
Device and drawbench for producing thin glass Download PDFInfo
- Publication number
- CN1657453A CN1657453A CN2005100095568A CN200510009556A CN1657453A CN 1657453 A CN1657453 A CN 1657453A CN 2005100095568 A CN2005100095568 A CN 2005100095568A CN 200510009556 A CN200510009556 A CN 200510009556A CN 1657453 A CN1657453 A CN 1657453A
- Authority
- CN
- China
- Prior art keywords
- drawbench
- glass
- nozzle
- sectional area
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- 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
-
- 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
- C03B17/068—Means for providing the drawing force, e.g. traction or draw rollers
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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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Glass Melting And Manufacturing (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
An arrangement for producing thin sheets of glass, especially sheets which are less than 3 mm thick, comprises a melting bath, a homogenising system, a supply and a drawing tank. The drawing tank has a nozzle system with at least one nozzle slot. The tank (7') has at least two sections of different cross-section, which are dimensioned so the pressure drop at each point on the nozzle (8) is constant.
Description
Technical field
The present invention relates to a kind of production sheet glass, be specially thickness for less than 3 millimeters sheet glass, device, device is provided with melting tank, homogenizing treatment system, inlet and drawbench, the nozzle system of this drawbench comprises at least one slot nozzle.In addition, the invention still further relates to suitable drawbench.
Background technology
In known glass tube down-drawing technology, the glass that comes out from melting tank at first is transported to stirring crucible, and glass carries out homogenizing mechanically in stirring crucible.Glass melt is transported to drawbench by transfer lime, and drawbench is fixed with the drawing mouth.The drawing mouth is provided with groove, and glass ribbon is pulled out by groove.The drawbench that has the drawing mouth is actually builder.The width of drawbench equals the hope width of the glass ribbon that will pull out at least.Suitable heating unit makes the glass heats in the drawbench arrive the forming temperature of wishing.Glass in the drawbench is uniformly distributed on the width of nozzle slot from the transfer lime that is generally rounded section in addition.In order to make from the effusive fluid of rounded section or glass distribution to whole long cross section, the mechanism with horizontally extending cylindrical interior volume is connected to vertically extending transfer lime as drawbench usually.Corresponding device thereof can be with reference to German patent DE-B 1 596 484.
Thickness is less than 3 millimeters, specifically be thickness less than 1 millimeter, sheet glass, generally be used for electron device, as the digital mass storage of display screen (Cell phone, flat-faced screen etc.) and computer, glass substrate.Therefore, to the weight under the internal soundness of glass, degree of cleaning, surface geometry size quality, breaking tenacity, some situation is little very high requirement arranged all.Internal soundness depends on bubble and impurity basically.The surface geometry size quality is decided by crimpness and plane deviation (distortion) basically.
For traditional drawbench, have been noted that glass flows to the center of nozzle earlier.Conversely, the external region of drawbench does not have enough glass.In addition, flow dead can form in upper corner, and this zone has irregular size, causes the technological process fluctuation.
In the past, attempted to improve the quality of sheet glass by utilizing in the mentioned nozzle area relatively the horizontal specified temp of drawing direction to distribute.For this reason, 100 64 977 C1 are disclosed as German patent DE, and inlet, drawbench and nozzle system are designed to closed system, and the inlet that is provided with round tube has the symmetry tubes part, and drawbench is provided with heating system, can be divided into vertical direction and horizontal part.
Japanese Patent 2002-211934A has selected different modes, proposes on the internal diameter of drawbench seam to be set, and can cooperate slot nozzle, and makes that the centre of seam is narrower than the outer end.Increase the resistance to flow at center like this, made the relative term of glass flow of outer end increase.
Summary of the invention
The objective of the invention is to propose a kind of device of production sheets of glass and suitable drawbench, can produce the glass ribbon that satisfies high-level constant thickness and planeness.
Realized purpose of the present invention by the device of claim 1 of the present invention and the suitable drawbench of claim 8.The structure of tool superiority provides in claim 2 to 7 and claim 9 to 13.
According to the present invention, described drawbench comprises at least two parts that have different cross-sectional respectively, and sectional area is measured along the flow direction that is orthogonal to glass flow.The distance that glass melt between inlet and the slot nozzle covers comprises at least two sections, one section on a part, another section is on another part.The length that pressure drop on every in this case segment distance is proportional to distance multiply by the resistance to flow of this section.By making at least two sections of working in coordination have different distances and resistance to flow, can guarantee that the last total pressure drop of distance that the glass melt of two parts covers is a constant, especially the pressure drop in any position of slot nozzle is a constant.Can guarantee glass flow uniform distribution on whole width like this, make any position of mass flow on well width of glass all identical.To cause the drawing glass ribbon on whole bandwidth, to have very constant thickness and planeness like this.
For fluid dynamic reason, described inlet preferably is communicated to the part with larger sectional area, be to have the long-pending part of small cross sections then, depend on flow velocity, the fluid dead band can occur in from the long-pending zone of transition of distinguishing the larger sectional area district of small cross sections, and the dead band can cause the processing fluctuation of uncertain region.
Particularly, when making the inlet of apparatus rounded section, the surface portion at suggestion inlet opening place has circular cross section equally.
If open communication is to the centre of the width of drawbench, and two outward extending therefrom pipes are arranged to have the part of larger sectional area, can obtain very equally distributed glass melt on whole nozzle.Two pipes have identical sectional area, so the even dimidiation of quality fluid, respectively uniform distribution on the external whole width of mind-set therefrom.Particularly, verified under such flow condition, the angle between described slot nozzle and the pipe is preferably between 5 ° and 45 °.
In a preferred embodiment, have the long-pending part of small cross sections and have the square-section.This has been verified to be fit to have the part of the circle of larger cross-section very much.
Become at pipe under the situation of the part with larger sectional area, the circumferential wall of pipe is provided with the groove that is parallel to the tubular axis line, and groove can be by parallel wall adjacency, to form less cross-sectional area.These walls can open in slot nozzle then.Along slot nozzle longitudinally between the parallel walls distance in this case should be less than the cross section of pipe.
Verifiedly be preferably in drawbench heating member is set.This means that drawbench can heat, and makes the temperature distribution of glass be suitable for the drawing process that nozzle region carries out most on its width and height.
Drawbench should adopt refractory material.Platinum or platinum alloy are most preferred.
Description of drawings
The present invention will be described in more detail with reference to the accompanying drawings, in the accompanying drawing:
Fig. 1 a, 1b are the devices according to the production sheet glass of prior art;
Fig. 2 has shown according to drawbench of the present invention; With
Fig. 3 has shown the distance that glass melt covers.
Embodiment
Glass melt A in the melting tank 1 shown in Figure 1 enters container 3 by jitty 2, carries out homogenizing by rotator 4 in container 3.Rotator 4 drives by transmission mechanism 5, and its speed is controlled.Then, melt A is transported to drawbench 7 by channel C uniformly, and drawbench is provided with nozzle 8, nozzle platinum manufacturing, and be provided with lower channel.
Nozzle 8 is arranged on the bottom of drawbench 7, is lined with platinum or platinum alloy equally, can be by direct energising heating through support coils and/or platinum coating, and this heating is undertaken by controlled current source 19, is independent of the heating of drawbench 7.
Fig. 1 a demonstrates entire structure and seals, the bath surface in the nozzle 8 be positioned at exceptionally rotator 4 above, make the melt can not the contact openings surface, the vapor pipe 17 that only is provided with heater coil 16 can.
Melt utilizes known draw-off gear to carry out drawing after the glass flow B curing from nozzle 8 guiding downwards, promptly passes through return idler.Glass ribbon can be cut into the length of hope then.
Fig. 1 b, it demonstrates the ad hoc structure of drawbench 7 corresponding to the section D-D among Fig. 1 a, and it is provided with inlet 20 and nozzle 8.Inlet 20 and drawbench 7 all are tubular design, are provided with the pipe as drawbench 7, and its orthogonal directions along the pipe that forms inlet extends.Horizontally extending pipe can join by the line of rabbet joint, and the line of rabbet joint is parallel to the tubular axis line, the very narrow drawing nozzle 8 that formed of the line of rabbet joint.Glass is preferentially towards the center flow of nozzle, so the outside area of drawbench 7 does not have enough glass flow.In addition, glass is difficult to flow to left top and right top corners, because its irregular shape forms the fluid dead band, causes the technological process fluctuation.
Fig. 2 has shown according to drawbench 7` of the present invention.Drawbench 7` has the part of larger sectional area, and by pipe 21a, 21b forms; The part 22 long-pending with small cross sections, its by with pipe 21a, the parallel plate that 21b links to each other forms.Form distance between the parallel plate of part 22 under situation of the present invention less than pipe 21a, the cross section of 21b.
The whole width of nozzle is 1850 millimeters.Width with the long-pending part 22 of small cross sections is 50 millimeters, and pipe 21a, the diameter of 21b is 80 millimeters.Pipe 21a, the angle [alpha] that 21b and nozzle 8 form is 30 °.Particularly, be approximately 10 in general glass melt viscosity
3Under the situation of Pas, it is independent of concrete glass ingredient and temperature, and particular geometric shapes can guarantee that quality fluid all positions in nozzle of glass are identical.The assign action of drawbench 7` generally is to be independent of viscosity, unless there is temperature distribution on width.As shown in Figure 3, form relational expression 11a * w1+12a * w2=11b * w1+12b * w2=constant supply.In this relational expression, 11a and 11b are the coverage distances with part of larger sectional area, produce lower resistance to flow w1, and 12a and 12b are the coverage distances with the long-pending part of small cross sections, therefore have higher resistance to flow w2.It should be noted that sectional area all is to measure being orthogonal on the flow direction of glass melt.
Traditional fluid simulation instrument allows to set pipe diameter, angle and wall spacing, makes it meet above-mentioned equation.For example, for bigger angle, the wall spacing will be managed diameter relatively to be increased.By simulation tool, can also design the geometrical dimension of drawbench, by changing parameters such as pipe diameter, angle and wall spacing, can realize the uniform distribution of glass melt, even there is uneven temperature distribution on the width.
Claims (13)
1. produce sheet glass for one kind, be specially thickness less than 3 millimeters sheet glass, device, be provided with melting tank, homogenizing treatment system, inlet and drawbench, described drawbench is provided with nozzle system, comprises at least one slot nozzle; It is characterized in that, described drawbench (7`) has the part (21a of at least two different cross-sectional on its whole width, 21b, 22), described part (21a, 21b, 22) size makes the distance (L1a that the glass melt of described two parts covers, L1b, L2a, L2b) total pressure drop on all is constant and identical in any position of described slot nozzle (8).
2. device according to claim 1 is characterized in that, described inlet (20) link part with larger sectional area (21a, 21b).
3. device according to claim 1 and 2 is characterized in that, (21a 21b) has the basic circular cross section that is to have the described part of larger sectional area.
4. according to each described device in the claim 1 to 3, it is characterized in that described inlet (20) is communicated to the mid-way of drawbench (7`) width, (21a 21b) is arranged to have the part of larger sectional area to outward extending therefrom two pipes.
5. device according to claim 4 is characterized in that, (21a, 21b) angle [alpha] between is between 5 ° and 45 ° for described slot nozzle (8) and pipe.
6. according to each described device in the claim 1 to 5, it is characterized in that having the long-pending described part (22) of small cross sections and have the square-section.
7. according to each described device in the claim 1 to 6, it is characterized in that described drawbench (7`) is heatable.
8. a drawbench is used to produce sheet glass, is specially thickness less than 3 millimeters sheet glass, device, it is characterized in that described drawbench has the part (21a of at least two different cross-sectional on its whole width, 21b, 22), described part (21a, 21b, 22) size makes the distance (L1a that the glass melt of two parts covers, L1b, L2a, L2b) total pressure drop on all is constant and identical in any position of described slot nozzle (8).
9. drawbench according to claim 8 is characterized in that, (21a 21b) has the basic circular cross section that is to have the part of larger sectional area.
10. according to Claim 8 or 9 described drawbenchs, it is characterized in that therefrom (21a 21b) is arranged to have the part of larger sectional area to outward extending two pipes of the heart.
11. drawbench according to claim 10 is characterized in that, (21a, 21b) angle [alpha] between is between 5 ° and 45 ° for described slot nozzle (8) and pipe.
12. each described drawbench in 11 is characterized in that according to Claim 8, has the long-pending described part (22) of small cross sections and has the square-section.
13. each described drawbench in 12 is characterized in that described drawbench can heat according to Claim 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004007560.3 | 2004-02-17 | ||
| DE102004007560A DE102004007560B4 (en) | 2004-02-17 | 2004-02-17 | Device and drawing tank for the production of thin glass panes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1657453A true CN1657453A (en) | 2005-08-24 |
| CN1657453B CN1657453B (en) | 2010-09-01 |
Family
ID=34813432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100095568A Active CN1657453B (en) | 2004-02-17 | 2005-02-17 | Device and drawbench for producing thin glass |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP4568616B2 (en) |
| KR (1) | KR20060042932A (en) |
| CN (1) | CN1657453B (en) |
| DE (1) | DE102004007560B4 (en) |
| HK (1) | HK1079757B (en) |
| TW (1) | TWI356812B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109071301A (en) * | 2016-04-21 | 2018-12-21 | 康宁股份有限公司 | Method and apparatus for processing glass |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005019646C5 (en) | 2005-04-26 | 2020-04-30 | AGC Inc. | Device for transferring glass melt to a float bath |
| JP4788951B2 (en) * | 2005-09-27 | 2011-10-05 | 日本電気硝子株式会社 | Sheet glass manufacturing method and apparatus |
| DE102005052421A1 (en) * | 2005-11-03 | 2007-05-16 | Schott Ag | Method for producing cover glasses for radiation-sensitive sensors and apparatus for carrying out the method |
| DE102009026869A1 (en) | 2009-06-09 | 2011-02-03 | Schott Ag | Producing a flat membrane made of porous glass, comprises molding a glass melt to a thin glass plate in a hot-forming process in a desired final thickness, and subsequently thermally separating and extracting the thin glass plate |
| JP6036192B2 (en) * | 2012-11-09 | 2016-11-30 | 旭硝子株式会社 | Sheet glass forming nozzle |
| DE102014002577A1 (en) | 2014-02-26 | 2015-08-27 | Schott Ag | White opaque glass, for use in the housing of electronic devices, in particular smart phones, tablet PCs and methods for producing such a glass |
| KR20180100018A (en) * | 2017-02-28 | 2018-09-06 | 코닝 인코포레이티드 | Apparatus for cleaning edge director and method of cleaning edge director |
| DE102018201846A1 (en) | 2018-02-06 | 2019-08-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Deformable film of at least one inorganic non-metallic material, process for their preparation, and their use |
| DE102019120064A1 (en) | 2019-07-24 | 2021-01-28 | Schott Ag | Device and method for producing glass ribbons |
| CN110590132B (en) * | 2019-10-22 | 2021-11-30 | 河北省沙河玻璃技术研究院 | U-shaped groove platinum-rhodium alloy bushing |
| CN112321137B (en) * | 2020-11-19 | 2024-10-01 | 河北省沙河玻璃技术研究院 | Voltage-stabilizing temperature-regulating device for preparing flexible glass by slit method and control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1596484B1 (en) * | 1967-07-18 | 1971-10-28 | Jenaer Glaswerk Schott & Gen | DEVICE FOR MAKING PANELS OF GLASS BY PULLING DOWN |
| JPH07277761A (en) * | 1994-04-08 | 1995-10-24 | Matsushita Electric Ind Co Ltd | Glass composition, space-forming flat glass filament, crucible for forming the filament, glass-coating apparatus for space-forming and automatic breaking apparatus for glass filament |
| DE10009266A1 (en) * | 2000-02-26 | 2001-08-30 | Enigk Hans Joachim | Production of a glass strip used for electronic applications comprises shaping with a slit-like nozzle having a regulated outlet cross-section and heating and cooling zones |
| JP2002211934A (en) * | 2000-11-10 | 2002-07-31 | Ohara Inc | Method of forming sheet glass |
| DE10064977C1 (en) * | 2000-12-23 | 2002-10-02 | Schott Glas | Device for the production of thin glass panes |
-
2004
- 2004-02-17 DE DE102004007560A patent/DE102004007560B4/en not_active Expired - Fee Related
-
2005
- 2005-01-20 TW TW094101724A patent/TWI356812B/en not_active IP Right Cessation
- 2005-02-02 KR KR1020050009439A patent/KR20060042932A/en not_active Application Discontinuation
- 2005-02-15 JP JP2005037248A patent/JP4568616B2/en active Active
- 2005-02-17 CN CN2005100095568A patent/CN1657453B/en active Active
- 2005-12-29 HK HK05112117.8A patent/HK1079757B/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109071301A (en) * | 2016-04-21 | 2018-12-21 | 康宁股份有限公司 | Method and apparatus for processing glass |
| US11180404B2 (en) | 2016-04-21 | 2021-11-23 | Corning Incorporated | Method and apparatus for processing glass |
| CN109071301B (en) * | 2016-04-21 | 2022-02-01 | 康宁股份有限公司 | Method and apparatus for processing glass |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004007560A1 (en) | 2005-09-01 |
| DE102004007560B4 (en) | 2006-02-09 |
| KR20060042932A (en) | 2006-05-15 |
| TW200528404A (en) | 2005-09-01 |
| HK1079757B (en) | 2010-12-24 |
| HK1079757A1 (en) | 2006-04-13 |
| JP4568616B2 (en) | 2010-10-27 |
| JP2005231992A (en) | 2005-09-02 |
| TWI356812B (en) | 2012-01-21 |
| CN1657453B (en) | 2010-09-01 |
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