CN104185611B - The method and apparatus for manufacturing glass tape - Google Patents
The method and apparatus for manufacturing glass tape Download PDFInfo
- Publication number
- CN104185611B CN104185611B CN201280065946.5A CN201280065946A CN104185611B CN 104185611 B CN104185611 B CN 104185611B CN 201280065946 A CN201280065946 A CN 201280065946A CN 104185611 B CN104185611 B CN 104185611B
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- China
- Prior art keywords
- glass
- glass tape
- tape
- heating element
- furnace
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/037—Re-forming glass sheets by drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/12—Other methods of shaping glass by liquid-phase reaction processes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The present invention relates to the method and its device of the Flat belt of manufacture glass-based material.Method includes providing glass preform, heats glass preform in stove, form tear drop and prefabricated band, remove tear drop and prefabricated glass band is drawn into flat glass band.Additionally provide the device for glass preform to be drawn into glass tape, device includes tempering furnace, for being stretched prefabricated band and being drawn into the stretching arm of glass tape and for applying downward force to the phase reverse edge roller of glass tape.Tempering furnace may include multiple independent heating elements, and the temperature of each heating element heater can control respectively.Device also includes the annealing furnace that glass tape is annealed.
Description
The application is required on the November 9th, 2011 of the U.S.Provisional Serial submitted according to 35.U.S.C. § 119
The benefit of priority of No. 61/557521, its content is as foundation and to be included in a manner of herein.
Background of invention
Invention field
This patent disclosure relates generally to the method and apparatus for forming glass tape, and relate more specifically to draw from glass preform and put down
The method and apparatus of thin glass tape.
Technical background
The demand of the accurate flat glass band of flat glass band, especially great surface quality and thickness is increasingly increased
Add, glass tape is made up of glass-based material or glass ceramics.Flat-panel monitor comprising this Flat belt is greatly closed
Note.Mostly concern concentrated on such as those be used for portable computer skinny device and such as flat-panel monitor (i.e. TV) it is non-
Often in big equipment.However, existing positive consideration flexible display, and become bright for very thin, flexible glass substrate demand
It is aobvious.
The two methods for being commonly used to manufacture display base plate are floating process and melting technology.Both techniques are required for
Refractory glass melter by melten glass shaping raw material to be streamed to glass tape shaped device.In the feelings of high strain-point glass component
, it is necessary to which relatively large high-temperature glass melter is molded so that the melten glass shaping raw material of high quality is streamed into glass tape under condition
Device.This is due to the high melting temperature that high strain-point glass has usually more than 1700 DEG C.
In floating process, melten glass shaping raw material stream is from furnace emissions to the float furnace containing liquid metal medium.
Generally, metal is tin.The air in float furnace is controlled to prevent tin from aoxidizing.Melten glass is in the form of flat continuous band in liquid
Float and extend on tin.Glass tape is admitted in annealing furnace or cooling tunnel, glass tape in annealing furnace or cooling tunnel with by
The speed of control is cooled to environment temperature.Glass after cooling has and can needed in some cases by such as grinding and polishing
Flat, the smooth surface that process is further repaired.
However, it is hardly formed the glass with high strain-point in surrounding containing molten tin.Because tin more than
There is high-vapor-pressure at a temperature of 1050 to 1100 DEG C.Under the high forming temperature needed for high strain-point glass, molten tin is floating
It can vaporize in method stove and then be condensed in the colder part of stove.In some cases, condensation sufficiently high can be referred to as with producing
The situation of " tin rain ", in this case, tin is fallen on glass and comprising on the glass surface a shower ofly.
In melting technology, glass shaping fused solution flows into fire resisting groove and then overflow in a controlled manner from the either side of groove
Stream.The ribbon surfaces that the major advantage of the technique is ultimately formed will not connect with any refractory material or other formers
Touch.Another benefit of the technique is that it forms very flat and equal thick glass tape.It is therefore not necessary to second is handled to obtain use
In smooth, the flat and uniform glass tape of display application.However, method has due to required high temperature and can not handle has
The shortcomings that high strain-point glass, because the temperature has greatly accelerated the deterioration of glass profiled part and has increase glass melting liquid dirty
The possibility of dye.Generally, thus it will be appreciated that 105To 106Glass is formed under viscosity in the range of pool to obtain best fit plane degree
And uniform thickness.
Unfortunately, either fusion draw process or float glass technology all can not be effectively from high strain-points
The glass ingredient of (for example, strain point that can be more than 900 DEG C) produces flat, very thin glass tape.
The content of the invention
The ability for producing thin flexible glass substrate is that the roller of flexible electronic device and display is of interest to roller working process
's.As it is used herein, roller to roller refers to supply to the glass tape of the second roller or takers-in from the first roller or source roller, wherein
Glass tape from source roller advance to takers-in when, the working process of band occurs.Such as slot drawn, found the thin glass of manufacture with float glass process
The existing process of glass plate has the limitation for producing thin glass tape, such as with about 200 μm of equally thin or about 200 μm of ratios
The glass tape of the thickness of thin (for example, 50 to 100 microns).Again draw or draw glass plate prefabrication downwards and make it possible to manufacture
Glass tape with the thickness less than 100 and good geometry and Intensity attribute.Even if it is not new moulding process to draw again
And have been used for fiber, tubing and other glasswares, but the ability for drawing flat glass band is that acquisition is sufficiently thin and soft enough
Property substrate unique technical, the substrate can wind and for roller to roller technique.Roller to roller technique enables coating to pass through existing work
Industry technology is printed in thin substrate.For example, in roller into roller technique, thin film electronic can be deposited on movable glass band.
The glass tape of edge without band, non-distorted, wrinkle or other visible deformations can draw glass by controlling
Specified temp distribution in viscosity and holding tempering furnace.This second stove that shape can be drawn by using heat treatment extends.Deformation
Can further it be reduced to glass tape by applying low tensile stress.Drawing glassribbons can scribble protective coating to keep its intensity category
Property simultaneously makes glass tape to wind.
Therefore, in one embodiment, a kind of method for manufacturing glass tape is disclosed, this method is included in tempering furnace and added
For hot glass preform to form glass tape, glass preform includes core, a pair of opposing edge parts and glass preform
Thickness be more than 200 μm, but preferably less than 1.5mm, heating includes heating glass preform and caused in the viscoelastic region of glass tape
Interior, the temperature of the core of glass tape is higher than the temperature of the marginal portion of glass tape.Glass tape is drawn to predetermined thickness and caused
The core of glass tape in the annealing temperature higher than glass tape but is less than the soft of glass tape less than 200 μm and in heat-treatment furnace
It is heat-treated at a temperature of changing point.First coating is coatable to arrive glass tape, and after this, glass tape can be wound up on take-up spool, its
The bending radius of middle wound glass tape is less than about 10cm.
Tempering furnace may include to be positioned to and the orthogonal edge heating element of side heat element.Method is additionally included in back
Glass preform is heated in preheating furnace before heating in stove.
Drawing glassribbons are preferably comprised glass tape and tractor component touch, and the traction device assembly is in two reversely rotations
Turn downward drawing glassribbons between conveyer belt.It is preferred that the core of glass tape has the thickness less than about 200 μm.Glass
The marginal portion of glass band is also smaller than 200 μm.
The strain point of glass preform is preferably higher than about 600 DEG C, and in certain embodiments, strain point is higher than about
900℃。
Protective coating before the contact by drawing device assembly it is coatable to glass tape coating be located at glass tape and
Between reverse rotation conveyer belt.For example, protective coating can be used as being derived from the solid film of coating raw material volume, coating raw material can be from source roller
Untie and be coated to glass tape.Once being formed, glass tape can be rolled onto on spool.
In another embodiment, a kind of device of drawing glassribbons is described, the device includes being configured to heat solid-state glass
The tempering furnace of glass prefabrication, tempering furnace include along more than first horizontally disposed individual heating element heaters of the width of tempering furnace and along with
More than second horizontally disposed individual heating element heaters of the width mutually orthogonal direction of tempering furnace.
Device can also include heat-treatment furnace, and heat-treatment furnace includes the multiple heating units arranged vertically along the length of heat-treatment furnace
Part.It is installed in rotation on below tempering furnace and is preferably configured as extending and retracting from glass tape relative to glass tape respectively
Reverse rotation conveyor belt design glass tape and apply downward power to glass tape into coordinating.Device, which is preferably comprised, to be used for film
Material is coated in glass tape and reversely rotates the first applying coating device between conveyer belt.In certain embodiments, device includes
Positioned at the second applying coating device for reversely rotating conveyer belt downstream.
More than first individual heating element heaters (that is, the temperature for controlling heating element heater respectively) are preferably controlled respectively.Also can control respectively
Make individual heating element heater more than second.
Device may also include the preheating furnace positioned at tempering furnace upstream.
Below in reference to accompanying drawing illustrative description during, it will the present invention is more readily understood, of the invention is other
Purpose, feature, details and advantage can also become more fully apparent, and the illustrative description is not intended to the limited making of taste anyway
With.
Brief description of the drawings
Fig. 1 is the sectional view for the device that glass plate is drawn into more thin glass plate again；
Fig. 2 be for Fig. 1 device include optional preheating furnace and heat-treatment furnace tempering furnace sectional view；
Fig. 3 is the vertical view of Fig. 2 of the horizontally disposed heating element heater of heating zone tempering furnace for showing to include to control respectively
Sectional view；
Fig. 4 is the stereogram of the independent heating element heater of Fig. 2 tempering furnace；
Fig. 5 is bowing for Fig. 2 of the heating element heater of the vertical arrangement for the heating zone for showing to include controlling respectively heat-treatment furnace
Depending on sectional view.
Embodiment
In the following detailed description, in order to illustrate rather than the purpose of limitation, showing for a variety of specific details will be illustrated
Example embodiment is to be fully understood by the present invention.But one of ordinary skill in the art is being used for reference in disclosed herein
After appearance, it is readily apparent that can be put into practice without departing from the other embodiments of detail disclosed herein for them
The present invention.In addition, description of the omission to known devices, method and material is so that description of the invention understands.Finally, use as far as possible
Identical reference indicates identical component.
Embodiments of the invention heat glass preform including offer glass preform, in stove, form tear drop and will be in advance
Product is drawn into glass tape etc..Meant by forming tear drop and glass preform is heated at least its softening point, therefore in advance
The change thickness portion (tear drop) of product leaves from preform body, is drawn into roomy flat glass stream.Softening point is generally recognized
To be glass in its own weight, about 107.6The temperature that can be deformed under pool viscosity.
In one embodiment of the invention, glass preform is formed by traditional glass forming technique.These technology bags
Chemical vapor deposition and die casting method are included, includes the use of sol-gel.Chemical vapor deposition (CVD) technology is in field fiber
It is well known, and including outside vapor deposition (OVD), vapour deposition (VAD) and improved chemical vapor deposition (MCVD) etc.
Deng.OVD and VAD is required for degrading glass precursor chemicals in flame to form soot (soot), and by soot deposit to target
Upper formation cellular glass soot preform product.Heated by first in the case of the purgative gas that such as chlorine-containing gas be present prefabricated
Product, after this prefabrication be further heated sufficiently to the temperature for causing soot particles to be solidified into bright solid glass prefabrication
Degree, porous soot preform product can then be cleaned, dried and solidified.It is to be noted, however, that available glass deposition process is unlimited
In example set forth above.
In contrast to OVD or VAD, the die casting of glass preform may include that mixing organic glass precursors are prefabricated to form green compact
Product.Green compact prefabrication by heating and/or dried exposed to the suitable purgative gas of such as chlorine-containing gas, be then heated to by
Green compact prefabrication is solidified into bright solid glass prefabrication.The alternative of molded glass prefabrication is included in suitable crucible
Melt glass (for example, cullet or glass soot) and melten glass is hereafter poured into appropriate mould to form required prefabrication
Shape.Two kinds of die casting methods are well known in the art and will not be described further.Such as with foregoing deposit glass
Method it is the same, it should be noted that die casting method be not limited to set forth herein example.
In other embodiments, glass preform can be founded or other traditional glasses of floating process as the aforementioned by all
Forming technique is formed.In addition, these techniques are well known and will not be described further.
Fig. 1 shows according to embodiments of the present invention to be used to generally use accompanying drawing by what glass preform 14 was drawn into glass tape 12
The exemplary means that mark 10 indicates.Glass preform 14 is the preceding glass plate in the edge seen in Fig. 1.Glass preform
14 can be more than 200 μm, for example more than 0.5mm, more than 0.7mm, more than 1.0mm or more than 1.2mm.However, glass preform 14
Generally but require to be less than 1.5mm.Include being used to keep downward with movable glass prefabrication 14 according to the device 10 of the present embodiment
Component feeding 16, tempering furnace 18, optional heat-treatment furnace 20, optional preheating furnace 22, the first coater 24, tractor 26, can
The second coater 28 and Webbing take-up device 30 of choosing.Generally, device 10 can be according to the width of prefabrication with about 3:1 ratio is from pre-
The thin glass tape of production of articles.That is, the necking down due to glass tape when it draws from glass preform, glass tape generally have about
It is 1/3rd beam overall of the beam overall of glass preform, during glass tape includes marginal portion and is arranged between marginal portion
Center portion point.
Glass preform 14 can provide by any one of above-mentioned technology or by other known glass manufacturing techniques.
It is preferred that glass preform 14 is rectangular shape, there is almost parallel relative edge and the width more than thickness.The glass of prefabrication
The glass preferably substantially transparent under visible wavelength, have scope from about 390nm on about 750nm wavelength at least about
95% light transmittance.The prefabrication formed for available such as cylindrical other shapes, prefabrication can be such as by grinding shape
Into rectangular shape.Although glass tape 12 can be from similar to the strain point for float glass process or the traditional glass of melting technology
The glass preform of (for example, between about 600 DEG C and 700 DEG C) is drawn, but can draw the glass with much higher strain point
Glass, for example it is more than about 700 DEG C, 800 DEG C or even greater than about 900 DEG C of strain point.For example, with about 1956 DEG C should
Apparatus and method of the present invention can be used to be drawn into glass tape for the pure vitreous silica of height.
Glass preform 14 is typically hung under the downward component feeding 16 of prefabrication, and downward component feeding 16 includes being used for
Clip on glass preform 14 and firmly hold the clip 32 of glass preform 14.Downward component feeding 16 can be by by nut
(not shown) is connected to the motor 36 of screw rod 38, and along parallel vertical direction, (along Z axis 34), movable glass is prefabricated up or down
Product.As it is used herein, X, Y and Z axis represent three orthogonal axis.But, using the teaching of the invention it is possible to provide to downward feed rate
The other suitable drives known in the art accurately controlled can be substituted for.Downward component feeding 16 can also along with Z axis phase
Mutually the mobile prefabrication in vertical direction (that is, along X-Y plane) causes glass preform to be appropriately positioned in tempering furnace 18.Example
Such as, glass preform 14 is preferably located at the center in tempering furnace to ensure that prefabrication uniformly heats.
Once being suspended under downward component feeding 16, glass preform 14 lowers into tempering furnace by downward component feeding
18 hot-zone, therefore the bottom of glass preform 14 is heated at least its softening point.For example, tempering furnace can be heated to it is at least big
About 1075 DEG C of temperature is so that prefabrication " tear drop ".The practice of tear drop allow glass make its width thinning under its own weight and
Carried out at a temperature of a little higher than actual draw operation temperature.Tempering furnace 18 can be resistance furnace, wherein hot by by electric current stream
Stratie is crossed to obtain；Induction furnace, wherein it is hot by microwave susceptor induced current obtain；Or stove heat can be arrived
At least other heating means of the temperature of the softening point of glass preform.For example, stove can be gas furnace, wherein gaseous fuel fires
Burn to form flame.It is preferred that glass can be heated at least about 900 ° of temperature by stove；More preferably at least about 1500 DEG C；
Most preferably arrive at least about 2200 DEG C.Once prefabrication is " tear drop ", so that it may reduces the temperature of tempering furnace.
In the embodiment of the tempering furnace 18 shown in Fig. 2, tempering furnace belongs to including being arranged to limit hollow interior space 46
A pair of rectangular shape relative side plates 42 and a pair of relative end plates 44 resistance type.Tempering furnace 18 includes being labeled as in Fig. 2
Multiple horizontally disposed heating zones in area 2-5, each heating zone include one along two primary side lateral arrangements of glass tape
Individual or multiple heating element heaters 48.It is preferred that the heating element heater of each heating zone is controlled independently of the heating element heater of other heating zones
System, and in certain embodiments, controlled independently of other heating element heaters in identical heating zone.Each heating element heater 48 compared with
Be goodly rod to ensure enough current capacities, and can be made up of such as molybdenum disilicide.In order to assist uniform thermal gradient of inducting
With reduce from the immediate glass preform of heating element heater caused by focus, side plate 42 and end plate 44 can be by such as diamond dust
(for example,) suitable high-temperature heat-conductive material be made and be located between glass preform and heating element heater.Side plate spreads
There is provided by heating element heater hot and interior in each heating zone offer more uniform temperature distribution in tempering furnace 18.Rectangle tempering furnace
End plate 44 has the construction similar to side plate and can heated as with 2-5 points of the area heating zone opened (area 6 is labeled as in Fig. 3).
Independent heating element heater 50 in end region (area 6) provide by by the edge heating of glass tape to being different from glass tape core
Temperature with the viscosity different from glass tape core draw glass plate edge ability.End heat element 50 can have
The direction arrangement for having with the design of the identical of side heat element 48 but being generally perpendicular to each other along the direction with side heat element 48,
And it is positioned to heat its edges in addition to transverse direction (main) surface of glass tape.It is preferred that the edge of glass preform
It is heated to the inside more than glass preform, the temperature of core.End plate 44 is by end heat element 50 and glass tape 12
Separate.Side plate 42 and end plate 44 relax what the drawing stress that drawing glassribbons apply due to thermal change and on prefabrication can be subjected to
Distortion and other plane deformations.
Most of glass forming operation requires isothermy, but when drawing wide flat rubber belting again, it is preferred that have non-etc.
Warm condition.Isothermy on glass preform can produce plus the pulling force for being applied to thinning glass tape on prefabrication width
Nonuniform stretching tension force.Under isothermal conditions, tensile stress can be bigger than at edge at prefabrication center and therefore in prefabrication
The glass of the heart can draw soon than edge.On prefabrication width caused tensile stress difference can be produced in glass tape distortion and
Thickness change.For example, the curling in its edges may occur in which.By specifically in the glass preform edge heating of prefabrication root
The influence of tensile stress is alleviated to the temperature higher than prefabrication center and produces more flat drawn ribbon.As it is used herein,
Prefabrication root refers to that glass preform is converted to the point of viscous liquid from elastic solid (Hookean body), may be generally characterized as width reduction.More
Briefly, root represents the region that glass preform terminates and glass tape starts.By temperature control at glass preform center
Specifically the ability between the prefabrication edge of prefabrication root makes it possible to draw flat and substantially non-distorted glass tape.
However, glass tape in extreme edge it is possible that some slight thickness changes.Accordingly, it may be desirable to remove edge part
Point.
In one embodiment, each side heat element 48 can be disposed linearly on the width of stove, i.e., in single file.Compared with
Goodly, the temperature of each heating element heater is for example separately controlled by controller (not shown) and can be separated for each heating element heater 48
Regulation.The use of each heating element heater, the temperature for each heating element heater that can be separately controlled are by promoting particular space temperature point
Cloth is applied to glass preform and specifically to the glass tape on ribbon width, there is provided the flexibility bigger to drawing process,
So as to reduce lacking for the temperature correlation for such as causing glass tape to distort due to the non-uniform temperature distribution on ribbon width
Fall into.In the example using heating element heater multiple and being separately controlled, controller also can control the temperature of each heating element heater with
Regulation is applied to the Temperature Distribution of glass preform.
As shown in figure 3, each tempering furnace heating element heater 48 and 50 can shape as along vertical with the vertical consistency of tempering furnace 18
The " u "-shaped element extended to L.That is, it is preferred that length of at least a portion of each heating element heater 48 and/or 50 along tempering furnace
Vertically extend along draw direction.Thermocouple 52 can insert tempering furnace 18 in the opening position suitable for monitoring tempering in-furnace temperature.
In addition to tempering furnace 18, as shown in figure 1, preheating furnace 22 can be positioned on the top of tempering furnace 18.Tempering furnace 18 is being drawn
Left unused between circulation at about 500 DEG C to extend the life-span of tempering furnace heating element heater and reduce stove heat to draw temperature institute
The time needed.If the heat expansion of glass is sufficiently low, that tempering furnace that glass preform is immersed in into 500 DEG C is not usually problem.
However, for high CTE glass, or if glass is chemcor glass, that is necessary when glass preform is loaded into tempering furnace
Carefully.In order to prevent the thermal shock to glass or tempering furnace part, optional preheating furnace 22 can be used for entering in glass preform 14
Glass preform is preheating to suitable temperature before entering tempering furnace 18.Preheating furnace 22 includes one be arranged on the width of preheating furnace 22
Individual or multiple heating element heaters 53, the heating element heater can be resistive heating elements.For example, heating element heater 53 can be such as line
The wire heating element heater of round wire heating element heater.Suitable heating element material may include tungsten or nichrome.
Device 10 may include optional heat-treatment furnace 20, and the embodiment of heat-treatment furnace 20 is shown in Fig. 2 and Fig. 5, at heat
Reason stove 20 can be positioned on the lower section of tempering furnace 18 relative to draw direction.It is preferred that heat-treatment furnace 20 has along treatment furnace edge side
The multiple heating zones arranged vertically to L, multiple heating zones include the multiple heating units arranged straight down along the length for the treatment of furnace
Part 54.Heat-treatment furnace 20 generally has the temperature capability reduced compared with tempering furnace 18, and can for example be provided with resistance metal silk
Heating element heater 54.That is, heating element heater 54 is preferably had than 48 and/or 50 small current capacity of tempering furnace heating element heater.At heat
Manage stove 20 and be preferably the side with independent control and the rectangular shape of end heat element.It should be noted that due to heat treatment
Temperature in the upper heating zone of stove is intended to operate on the annealing point of glass tape, therefore heat-treatment furnace 20 is not annealing furnace.Heat
Treatment furnace 20 is used to control the shape of glass tape to reduce the deformation in glass tape.In addition, heat-treatment furnace 20 contribute to reduce by
Glass tape quenching produces the part into the internal stress of glass tape.Heat-treatment furnace 20 can be directly coupled to tempering furnace 18, such as
Shown in Fig. 1, or heat-treatment furnace 20 can be separated and is spaced apart with tempering furnace 18.
Similar to tempering furnace 18, heat-treatment furnace 20 is preferably included between heating element heater and drawing glassribbons along heat treatment
The heat sink 39 of the width positioning of stove.Heat-treatment furnace may also include the radiating between end heat element and its edges
Plate 41.Heat sink 39 and 41 can be byOr similar material is made.
Increase the ability that heat-treatment furnace 20 further provides for drawing flat glass band under draw machines again.In view of handling
Lu Zhongshang areas are in just less than glass softening point but more than the temperature of glass annealing point, and treatment furnace still heat enough is to allow glass
Viscoelastic deformation.When glass tape crosses the upper area of heat-treatment furnace, the edge of drawing glassribbons is colder than center soon.With
Drawing tractor is equably on more carinate parts (not obscuring with the relatively low viscosity zone of above-mentioned prefabrication) of glass tape
Apply tensile stress, glass can flatten when edge quenches.The center for the treatment of furnace is in the Annealing Temperature of Glass higher than glass tape
Temperature and lower area about strain point of glass temperature.Because glass tape is so thin so that glass tape is in these regions
Time is sufficient, and this allows any residual stress in glass tape to be reduced or eliminated.This enables glass is no to roll up damagedly again
Around and be used subsequently to roller to roller technique.
After drawing process is stablized, polymer coating 56 is preferably coated with the glass on tractor 26 is drawn
Band.Coating 56 prevents glass tape from being contacted with downstream drawing components with the acceptable optical quality of holding surface and prevents that glass can be reduced
The glass surface damage of glass band strength.In addition to applying coating, or applying coating is substituted, what it is by adhesive tape applicator to belt edge is
System can be implemented in pulling process.The edge clung with adhesive tape of glass tape can handle the position of glass tape by providing, and
Roller can be carried out from spool to roller working process.That is, roller to roller processing equipment can clamp adhesive tape by mechanical conveying system.Or
If polymer coating removes before adhesive tape application, that can implement the adhesive tape applicator at edge offline.Therefore, equipment and technique can
The protective coating of all or part of width is coated to ribbon surfaces, and coating can permanently or temporarily be bonded to glass.
Therefore, Fig. 1 shows the first coater 24 that polymer coating 56 will be protected to be coated to glass tape 12.Protect polymer
Coating 56 can be supplied from least one donor rollers 58 and be coated to glass tape 12 by applicator 60.For example, applicator 60 can wrap
Include roller paint film being pressed onto on glass tape.It is preferred that the protection polymer coating 56 of coating is coated to two masters of glass tape
Want surface.Protection polymer coating 56 provides the mechanical protection to the high-quality area of glass tape 12 and prevents glass tape and tractor 26
Between direct contact.As it is used herein, the high-quality area of term refers to and is generally removed from glass tape and can be used as entering one
The marginal portion of the glass tape of cullet in step glass moulding processes directly contrasts, final to sell and for the glass tape of manufacture
Part.Therefore, high-quality area is the core of glass tape.
Once drawing, glass preform is lowered into stove with accurate feed rate, and the feed rate is by downward
Motor speed and the interior Temperature Distribution established of tempering furnace 18 are fed to control.For example, the typical case of glass preform feeding downwards
Speed about 10-12mm/min.As previously described, once tear drop is fallen and glass tape is attracted by tractor, tempering furnace is from opening
Beginning tear drop temperature (for example, about 1075 DEG C) drops to suitable draw temperature.Again the major parameter of pulling process, which drives, is：To
Lower feed rate, the furnace temperature and the also referred to as drawing speed of draw rate for controlling glass viscosity.Viscosity is drawn generally about 106
Moor about 107Between pool.The suitable stretching such as measured by the dynamometer in downward feeder system
Power, gratifying tensile stress can be in the range of about 2 to 3 pounds.Flake glass band is drawn from glass preform
Difficult point is that prefabrication can have the thick thickness of such as about 0.70mm but about 300mm is wide, and this is equivalent to about 1：400 height is wide
Than or it is bigger.Therefore, in order to keep the suitable flat degree of drawing glassribbons, it is necessary to carefully monitor glass preform downward feeding
Speed, furnace temperature and the draw rate applied by tractor 26.
In alternative embodiments, polymer coating is for example applied by the way that glass tape is pulled through into liquid coating pond.Or liquid
On the sprayable surface to glass of coating.The coatable one or more surfaces to glass of liquid coating.Hereafter, liquid coating can
Solidified by the suitable solidification equipment required by coating type.For example, solidification equipment can be for by being heating and curing
The oven (heat cure) or solidification equipment of coating can be by coating material solidified exposed to ultraviolet (photocuring) by coating.The coating or
Glass can be permanently or temporarily bonded to by being coated to the coating of glass tape.
Once tear drop is dropped through and arrived under heat-treatment furnace 20, it is generally pulled through downwards coater with hand and is put into drawing
Draw device assembly 26.Drawing tractor 26 includes two reverse rotation conveyer belts 62, reversely rotates conveyer belt 62 and passes through multiple drives
Driving wheel 64, which drives, make it that the motion between it is downward.Reversely rotating conveyer belt 62 can move inward to glass tape or away from glass
Glass band is displaced outwardly.When conveyer belt is combined, glass tape 12 is clipped between conveyer belt.Conveyer belt can pass through pneumatic actuator
Opening and closing, and the grip force applied in closure by conveyer belt can adjust.For the thin glass tape with core, in this
Center portion point with the thickness (such as average thickness) equal to or less than 200 μm, be for example equal to or less than about 150 μm, be equal to or
Less than about 100 μm and in some instances equal to or less than about 50 μm, grip force is maintained at minimum and passed in order to avoid crushing
The glass tape between band is sent, but is enough to allow conveyer belt successfully to open and close.Tractor unit speed is servo-controlled
And it is arranged to be enough to be maintained at the light tension on glass tape.Dynamometer on clamping device (not shown) provides measurement feedback
To controller so that the tensile stress for being applied to prefabrication can control.Typical draw rate or drawing speed are about
0.30m/min。
Conveyer belt 62 is from the downward drawing glassribbons 12 of glass preform 14.Conveyer belt 62 is preferably by high temperature resistant elastomeric material
It is made.It has been found that softer, more flexible conveyer belt performance is better than hard transmission belt surface.It is preferred that conveyer belt 62 is in glass
Extend on the whole width of band and can for example compare glass band width.Coating as the aforementioned is for example by can to glass tape by applying coating
It is positioned between glass tape and conveyer belt to prevent the major surfaces of glass tape from being contacted with conveyer belt.
Or tractor 26 may include a plurality of narrow conveyer belt, a plurality of narrow conveyer belt can it is independently vertically oriented and
Wherein every conveyer belt can open or close.For example, six conveyer belts can be used, wherein three conveyer belts are positioned at glass tape
Other three conveyer belts are positioned on the opposite side of glass tape on side.The retractor system enables glass tape only from its edge
Or drawn only from center or from the combination of center and peripheral.This arrangement of tractor conveyer belt allows substantially uniform pulling force
It is applied on much broader glass tape, such as the glass tape with the width for reaching 500mm.Foregoing " single " tractor is limited to width
Glass tape of the degree less than about 150mm.
When glass tape 12 is drawn downwards by tractor 26, ribbon thickness is thinning until the core of glass tape reaches
To predetermined thickness.That is, glass tape would generally include core and thickening marginal portion.Marginal portion can remove, wherein in
Center portion point can be processed further handling.The thickness of glass tape, and the especially thickness of core, it is that glass tape is drawn from prefabrication
A factor in temperature of speed, the speed (downward feed rate) of prefabrication feeding tempering furnace and tempering furnace stretched etc..
The upper thickness limit for the glass tape that can be drawn generally is determined by the thickness of prefabrication.It is preferred that the maximum gauge of drawing glassribbons is small
In about 1.5mm, less than about 1.0mm and more preferably less than about 0.7mm, but typically larger than 200 μm.Implemented according to the present invention
The glass tape that example is drawn can be drawn into cause the thickness of the core of glass tape equal to or less than about 200 μm, be equal to or small
In about 150 μm, equal to or less than about 100 μm or equal to or less than about 50 μm.The thickness of the marginal portion of glass tape
It can also be drawn into less than 200 μm.
The thickness of glass tape can be measured as a part for drawing process, and the measurement result can be used for control for example prefabricated
The downward feed rate of product and/or the draw rate of tractor 26.Ribbon thickness can be measured by suitable measurement apparatus, example
Such as the laser micrometer for using reference 66 to indicate in Fig. 1.This device is commercially readily available.Error signal is according to defeated
The ribbon thickness predetermined set-points for entering controller are produced by measurement apparatus 66.Error signal is delivered to controller and (not shown
Go out).Controller can be for example computer.Controller can adjust feeding downwards then according to predetermined instruction (such as computer program)
Speed, side roller velocity of rotation and/or torque or furnace temperature or its combination with reduce the error signal from measurement apparatus 66 and because
This correction ribbon thickness.
In certain embodiments, optional second coater 28 can be used.As shown in Figure 1, it may include for by diaphragm
68 are coated to the second coating device assembly 28 of glass tape 12.Diaphragm can be supplied from least one donor rollers 70 and pass through coating roll
72 are coated to glass tape 12.It is preferred that the diaphragm 68 of coating is coated to two major surfaces of glass tape.
Final step is the glass tape that winding coats coating.From draw operation recovery drawing glassribbons mode partly according to
Rely the thickness in glass tape, and more specifically thickening marginal portion.For example, if the thickened edges part of glass tape has
Electric coiling machine can be used to be wound up into the huge spool 31 shown in figure for thickness equal to or less than about hundreds of microns, that glass tape
On.Up- coiler, which has, allows glass to be tightly wound up into the tension force on spool with minimum tension.Spool can store very long by one
The section time, and because glass is bent around reel diameter, surface tension is produced on glass tape, therefore with relatively low on glass
Winding tension can reduce breakage.Huge spool 31 can be then used as with the source book axle in back roller to roller technique, wherein glass tape
Subsequent take-up spool is moved to from source book axle and middle working process occurs when it advances to take-up spool from source book axle for glass tape.
Middle working process may include such as finishing (for example, removal) its edges, one or more film layers of deposition or can be used for
Increase glass tape is worth to promote to provide other any techniques of finished product.For roller to roller working process, a few volume glass tapes can glue
It is connected together to provide greater length of glass tape.
Or if desired, can the time later from glass tape cutting predefined size each panel.With causing
Glass tape is being drawn in the glass tape for attempting to wind the thickness (for example, thickness is more than about 1mm) that can be fractureed during glass tape
During cleavable each panel into preliminary dimension or size.Glass tape cuts into each panel can be by known in the art
Any conventional method is completed, including glass tape delineation and fracture or be cut by laser.
Example
As described above, the fine-grained management of Temperature Distribution is that solve glass preform to be drawn into glass tape in glass preform
When the tensile stress difference that is subjected to necessary to.Therefore, tempering furnace and heat-treatment furnace are divided into area, wherein the temperature in each area can divide
Do not control.For example, referring to Fig. 2 and 3, can be created as from the exemplary temperature distribution of glass plate prefabrication drawing glassribbons so that returning
Each area of stove and heat-treatment furnace is heated according to table 1.
Table 1
Scope can be had from about 280mm to about 325mm width according to the glass preform of this example.Glass plate
Length is consistent with the amount of glass and the physical capability of drawing device for drawing.Glass preform has scope from about 600 DEG C
To about 1956 DEG C of strain point, for example, from about 600 DEG C to about 1000 DEG C, from about 600 DEG C to about 900 DEG C or from big
About 600 DEG C to about 800 DEG C.In other embodiments, glass preform have scope from about 700 DEG C to about 1956 DEG C,
Answering from about 800 DEG C to about 1956 DEG C, from about 900 DEG C to about 1956 DEG C or from about 1000 DEG C to about 1956 DEG C
Height.The thickness of prefabrication can be in the range of such as about 0.70 to about 1.5mm.
It is preferred that feedback of the glass preform by downward component feeding 16 with scope from about 10mm/min to 12mm/min
Speed is sent to drive downwards.By the draw rate that traction device assembly 26 applies in the range of from about 0.2 to about 0.4m/min.
For example, the draw rate applied by traction device assembly 26 can be about 0.3m/min, produced about in the centerline of glass tape
2.8 pounds of stretching pulling force.
It will be apparent for a person skilled in the art that various modifications and variations can be made to the present invention without departing from this hair
Bright spirit and scope.Therefore it is contemplated that the modifications and variations of the present invention are covered, as long as these modifications and variations are appended
In the range of appended claims and their equivalents.
Claims (15)
1. a kind of method for manufacturing glass tape, including：
Glass preform is heated in tempering furnace to form glass tape, the glass preform include core, a pair it is relative
Marginal portion and the thickness more than 200 μm and less than 1.5mm, the heating are included in heating glass at the root of glass preform
The marginal portion of prefabrication and the core cause in the viscoelastic region of the glass preform, the prefabricated glass
Temperature of the temperature of the marginal portion of product higher than the core of the glass preform；
The glass tape is drawn to the predetermined thickness less than 200 μm from the glass preform；
It is hot in heat-treatment furnace at a temperature of the softening point higher than the annealing temperature of the glass tape but less than the glass tape
Handle the glass tape drawn；
By the first applying coating to the glass tape；And
The glass tape is wound up on take-up spool, wherein the bending radius of the glass tape wound is less than 10cm.
2. the method as described in claim 1, it is characterised in that also include：Before the heating in the tempering furnace,
The glass preform is heated in preheating furnace.
3. the method as described in claim 1, it is characterised in that heat the glass preform and positioned including edge heating element
It is mutually perpendicular into side heat element.
4. the method as described in claim 1, it is characterised in that include the glass tape and traction device assembly the step of drawing
Contact, the traction device assembly draw downwards the glass tape between two reverse rotation conveyer belts.
5. the method as described in claim 1, it is characterised in that the glass preform has the strain point higher than 600 DEG C.
6. the method as described in claim 1, it is characterised in that the glass preform has the strain point higher than 900 DEG C.
7. method as claimed in claim 4, it is characterised in that first coating is by described in the traction device assembly
The glass tape is coated to before contact so that first coating is positioned at the glass tape and the reverse rotation conveyer belt
Between.
8. the method as described in claim 1, it is characterised in that first coating paints solid film.
9. the method as described in claim 1, it is characterised in that the heating includes：With heating element heats glass preform,
The heating element heater is configured to along the U-shaped element with the Longitudinal extending of tempering furnace vertical consistency.
10. a kind of device of drawing glassribbons, including：
Tempering furnace, the tempering furnace are configured to heat solid glass prefabrication, and the tempering furnace includes the width along the tempering furnace
Spend more than first horizontally disposed individual heating element heaters of direction and edge and the width mutually orthogonal direction of the tempering furnace is horizontal
More than second individual heating element heaters of arrangement, individual heating element heater more than described first are positioned to heat the main table of glass preform root
Face, individual heating element heater more than described second are positioned to heat the edge of glass preform root rather than the transverse direction of glass preform root
Major surfaces, so that temperature of the temperature at the edge of glass preform root higher than the core of glass preform root；
Heat-treatment furnace, the heat-treatment furnace include the multiple heating element heaters arranged vertically along the length of the heat-treatment furnace；
Relative reverse rotation conveyer belt, the reverse rotation conveyer belt are installed in rotation on below the tempering furnace and constructed
Into extending respectively to the glass tape and being retracted from the glass tape, wherein the extension makes the conveyer belt and the glass tape
Coordinate to apply downward power to the glass tape；And
First coater, first coater are used to membrane material being coated in the glass tape and the reverse rotation conveyer belt
Between.
11. device as claimed in claim 10, it is characterised in that control individual heating element heater more than described first respectively.
12. device as claimed in claim 10, it is characterised in that control individual heating element heater more than described second respectively.
13. device as claimed in claim 10, it is characterised in that also include：Preheating furnace positioned at the tempering furnace upstream.
14. device as claimed in claim 10, it is characterised in that also include：Positioned at the reverse rotation conveyer belt downstream
Second coater.
15. device as claimed in claim 10, it is characterised in that individual heating element heater more than described first and it is described more than second plus
Each heating element heater in thermal element is configured to along the U-shaped element with the Longitudinal extending of tempering furnace vertical consistency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161557521P | 2011-11-09 | 2011-11-09 | |
| US61/557,521 | 2011-11-09 | ||
| PCT/US2012/063819 WO2013070672A1 (en) | 2011-11-09 | 2012-11-07 | Process and device for manufacturing glass ribbon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104185611A CN104185611A (en) | 2014-12-03 |
| CN104185611B true CN104185611B (en) | 2018-02-06 |
Family
ID=48290493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280065946.5A Expired - Fee Related CN104185611B (en) | 2011-11-09 | 2012-11-07 | The method and apparatus for manufacturing glass tape |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6280503B2 (en) |
| KR (1) | KR101979048B1 (en) |
| CN (1) | CN104185611B (en) |
| TW (1) | TWI583637B (en) |
| WO (1) | WO2013070672A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014100750B4 (en) | 2013-04-30 | 2023-08-17 | Schott Ag | Process for the manufacture of glass components |
| DE102013105734B4 (en) | 2013-06-04 | 2024-08-22 | Schott Ag | Process for redrawing glass |
| US9321677B2 (en) * | 2014-01-29 | 2016-04-26 | Corning Incorporated | Bendable glass stack assemblies, articles and methods of making the same |
| JP2015182909A (en) * | 2014-03-24 | 2015-10-22 | Hoya株式会社 | Production apparatus of glass preform, production method of glass preform, and production method of optical element |
| CN106573451A (en) * | 2014-08-15 | 2017-04-19 | 3M创新有限公司 | Glass and polymer film assemblies and methods of making |
| JP6299973B2 (en) * | 2014-08-21 | 2018-03-28 | 日本電気硝子株式会社 | Glass pulling apparatus, glass forming apparatus and glass forming method |
| CN104261658A (en) * | 2014-09-24 | 2015-01-07 | 河北省沙河玻璃技术研究院 | Heating furnace for drawing flexible glass by virtue of secondary melting process |
| EP3978450A1 (en) * | 2014-11-26 | 2022-04-06 | Corning Incorporated | Thin glass sheet and system and method for forming the same |
| WO2017095791A1 (en) * | 2015-11-30 | 2017-06-08 | Corning Incorporated | Glass redraw system and methods of forming a thin glass sheet using a glass redraw system |
| KR20200026316A (en) * | 2017-07-28 | 2020-03-10 | 코닝 인코포레이티드 | Glass Processing Equipment and Methods |
| CN107522399A (en) * | 2017-09-18 | 2017-12-29 | 张家港伟宇工艺玻璃制品有限公司 | A kind of manufacture craft of high-performance artistic glass |
| NL2021322B1 (en) * | 2018-06-28 | 2020-01-06 | Corning Inc | Continuous methods of making glass ribbon and as-drawn glass articles from the same |
| WO2020005555A1 (en) | 2018-06-28 | 2020-01-02 | Corning Incorporated | Continuous methods of making glass ribbon and as-drawn glass articles from the same |
| US20210163334A1 (en) * | 2018-08-14 | 2021-06-03 | Corning Incorporated | Methods and apparatus for manufacturing a glass ribbon |
| CN114401929A (en) * | 2019-09-13 | 2022-04-26 | 康宁股份有限公司 | System and method for forming glass ribbon using heating device |
| WO2021050506A1 (en) * | 2019-09-13 | 2021-03-18 | Corning Incorporated | Continuous methods of forming glass ribbon using a gyrotron microwave heating device |
| WO2024044089A1 (en) * | 2022-08-25 | 2024-02-29 | Corning Incorporated | System and method for continuous casting of single- or multiple-layer composite glass structures |
| CN115710084A (en) * | 2022-11-03 | 2023-02-24 | 长飞光纤光缆股份有限公司 | Glass plate directional stretching device and stretching method |
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- 2012-11-07 WO PCT/US2012/063819 patent/WO2013070672A1/en active Application Filing
- 2012-11-07 KR KR1020147014869A patent/KR101979048B1/en active IP Right Grant
- 2012-11-07 JP JP2014541172A patent/JP6280503B2/en not_active Expired - Fee Related
- 2012-11-08 TW TW101141567A patent/TWI583637B/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104185611A (en) | 2014-12-03 |
| WO2013070672A1 (en) | 2013-05-16 |
| TW201328991A (en) | 2013-07-16 |
| KR20140107225A (en) | 2014-09-04 |
| JP2015502315A (en) | 2015-01-22 |
| TWI583637B (en) | 2017-05-21 |
| KR101979048B1 (en) | 2019-05-15 |
| JP6280503B2 (en) | 2018-02-14 |
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