CN203128398U - Glass plate manufacturing device - Google Patents
Glass plate manufacturing device Download PDFInfo
- Publication number
- CN203128398U CN203128398U CN2013200780979U CN201320078097U CN203128398U CN 203128398 U CN203128398 U CN 203128398U CN 2013200780979 U CN2013200780979 U CN 2013200780979U CN 201320078097 U CN201320078097 U CN 201320078097U CN 203128398 U CN203128398 U CN 203128398U
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- China
- Prior art keywords
- glass
- groove width
- groove
- melten glass
- transfer tube
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- 239000011521 glass Substances 0.000 title claims abstract description 236
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000005357 flat glass Substances 0.000 claims description 58
- 238000000465 moulding Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 21
- 230000004927 fusion Effects 0.000 claims description 18
- 230000003467 diminishing effect Effects 0.000 claims description 4
- 238000004031 devitrification Methods 0.000 abstract description 32
- 239000012530 fluid Substances 0.000 abstract description 20
- 239000007791 liquid phase Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 19
- 239000004065 semiconductor Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000005352 clarification Methods 0.000 description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910006404 SnO 2 Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000013872 defecation Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/005—Controlling, regulating or measuring
-
- 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)
Abstract
The utility model provides a glass plate manufacturing device. In the forming of melted glass by using a forming body, fluid of the melted glass passing through a trench part of the forming body is difficult to retain, so that devitrification and heterogeneous billet of the melted glass can be avoided; and therefore, high-quality glass plates can be manufactured. During the manufacturing of the glass plates, at the end of the trench part of the forming body, which is connected with a conveying pipe, the trench part is provided with a trench width narrow part of which the trench width is gradually or continuously reduced along the depth direction of the trench part; and in the melted glass flowing direction of the forming body, the trench width of the trench width narrow part is increased along the direction departing from the conveying pipe.
Description
Technical field
The utility model relates to the sheet glass manufacturing installation of making sheet glass.
Background technology
In the past, when making sheet glass, used overflow downdraw to carry out the moulding of sheet glass.In the overflow downdraw, thereby in the fusion groove frit fusion is formed melten glass, after this melten glass enforcement clarifying treatment, the processing that homogenizes, melten glass is supplied to the formed body of strip by transfer tube.
In the formed body of strip, be provided with the groove that extends along its length on the top of formed body, supply with melten glass to an end of this groove.For this groove, more then gash depth is more shallow to the opposition side of length direction from the supply side of melten glass, so melten glass overflows from the groove of formed body, flows down downwards along the formed body side walls.Thereby the melten glass that flows down downwards along the formed body side walls pools one at the interflow, lower end of formed body, forms foliated glass.
In addition, the flowing path section shape that melten glass is supplied to the transfer tube of formed body generally is toroidal, and the flowing path section of the groove of formed body is shaped as rectangle or polygonal shape.Making the flowing path section of transfer tube be shaped as toroidal is because also do not have curved part in the transfer tube, can keep intensity even preferably the melten glass of high temperature is filled to.On the other hand, make the flowing path section of the groove of formed body be shaped as rectangle or polygonal shape is because the easiness of groove processing.
For example, disclose a kind of formed body in Fig. 1, Fig. 3 of following patent documentation 1, it has flowing path section and is shaped as the transfer tube of toroidal and the groove that flowing path section is shaped as rectangular shape.Under this situation, when melten glass was supplied to the groove of formed body from round-shaped transfer tube, the flowing path section of melten glass had difference of altitude and sharply enlarges.
The prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Application Publication 2008-501609 communique
The utility model content
Utility model problem to be solved
As mentioned above, generally, the flowing path section that melten glass is supplied to the transfer tube of formed body is shaped as toroidal, the flowing path section of the groove of formed body is shaped as rectangle or polygonal shape, when therefore melten glass being supplied to the groove of formed body from transfer tube, the flowing path section of melten glass has difference of altitude and sharply enlarges.Therefore, because the rapid expansion of the stream of melten glass causes the part of the fluid of melten glass to rest on easily in the groove of formed body sometimes.The stop of the fluid of melten glass causes the devitrification of melten glass easily.In addition, the stop of the fluid of melten glass easily produces heterogeneous blank, also causes the generation of brush line easily.Illustrate in greater detail, if the fluid of melten glass stops, then compare with the melten glass of other parts, its duration of contact with formed body is elongated, so the composition of formed body makes the glass of melten glass form the locality variation from the surperficial stripping of formed body easily.In addition, be subjected to the Temperature Influence of formed body, the easy locality of the viscosity of melten glass changes.That is, easily produce heterogeneous blank in the melten glass, consequently: the sheet glass at the finished product is easy to generate brush line, and the thickness of sheet glass becomes inhomogeneous easily.
In addition, for the glass for flat panel display plate, be formed with TFT semiconductor elements such as (thin film transistors) at sheet glass.In recent years, become more meticulous in order to realize the further height that indicating meter shows, require to form the α-SiTFT that has always used since p-Si (low temperature polycrystalline silicon) TFT or oxide semiconductor replace in the past at sheet glass.In the formation operation of p-SiTFT or oxide semiconductor, there is the higher heat treatment step of temperature than the formation operation of α-SiTFT.Therefore, require its percent thermal shrinkage little for the sheet glass that is formed with p-Si (low temperature polycrystalline silicon) TFT or oxide semiconductor.In order to reduce shrinking percentage, preferably improve the strain point of glass, but the tendency that the high glass of strain point exists liquidus temperature to increase, liquid phase viscosity (in the viscosity of liquidus temperature) tends to descend.Therefore, the difference of the viscosity of the melten glass that the moulding of foliated glass sometimes is required (moulding viscosity) and liquid phase viscosity reduce or moulding viscosity ratio liquid phase viscosity big, its result can cause the easy devitrification of glass.Therefore, by p-Si (low temperature polycrystalline silicon) TFT form with or oxide semiconductor form with etc. the low glass of glass, particularly liquid phase viscosity when making foliated glass, a part of fluid that must fight off melten glass rests on the interior such situation of groove of formed body easily, because this situation might cause the composition of formed body from surperficial stripping, the liquid phase viscosity rising (generation of devitrification) of formed body.
Therefore, in order to solve problem in the past, the purpose of this utility model is to provide a kind of manufacturing installation of sheet glass, wherein, when using formed body to carry out the moulding of melten glass, the fluid of the melten glass of the groove by formed body is difficult to stop, and can not produce devitrification or heterogeneous blank in the melten glass, and can make does not have brush line and the uniform high-quality plate of glass of thickness of slab.
Be used for solving the method for problem
A mode of the present utility model relates to the sheet glass manufacturing installation of making sheet glass.This manufacturing installation possesses:
The fusion groove wherein, thereby is made melten glass with the frit fusion;
Shaped device wherein, while the groove that makes described melten glass flow to formed body utilizes overflow downdraw that described melten glass is carried out moulding, thereby is made foliated glass; With
Transfer tube, it is arranged between described fusion groove and the described shaped device, is used for described melten glass is supplied to described formed body.
In the connection end that the described groove of described formed body is connected with described transfer tube, described groove has the groove width small that groove width narrows down towards depth direction stage or the continuity of described groove.
In the mobile direction of the melten glass of described formed body, the groove width of described groove width small is along with becoming big away from described transfer tube.
So, described groove has described groove width small in the connection end, so melten glass does not flow to described groove from described transfer tube with can having stop smoothly.Therefore, melten glass can be controlled in more constant scope in the residence time of described groove, thereby melten glass is overflowed from described groove.Therefore, be difficult to produce devitrification or the heterogeneous blank of glass, can make the uniform high-quality plate of glass of no brush line and thickness of slab.
In addition, preferably, the groove width that the described groove of described formed body has with the location independent of the depth direction of described groove is constant groove width constant portion, and described groove width small is arranged on the trench bottom surfaces side of the gash depth direction of described groove with respect to described groove width constant portion.
Under this situation, near the fluid of the melten glass the trench bottom surfaces of the described groove of flowing through is difficult to produce stop.Therefore, be difficult to produce devitrification or the heterogeneous blank of glass, can make the uniform high-quality plate of glass of no brush line and thickness of slab.
In addition, preferably, described groove width small is formed by plane trench bottom surfaces and the scarp that tilts with respect to described trench bottom surfaces, the zone on described scarp in the mobile direction of described melten glass along with diminishing away from described transfer tube.
Under this situation, the flowing path section of the melten glass in the described groove is along with before the flow direction of melten glass and then enlarge, the groove width of described groove width small moves closer in the groove width of described groove width constant portion, so melten glass flows, is difficult to produce stop smoothly at described groove.Therefore, be difficult to produce devitrification or the heterogeneous blank of glass, can make the constant high-quality plate of glass of no brush line and thickness of slab.
In addition, preferably, the cross-sectional shape of described transfer tube is toroidal, and the described groove width of described groove width small narrows down corresponding to described toroidal and groove width bottom surface stage or the continuity towards described groove.
In addition, preferably, the cross-sectional shape of described groove width small is half-circle-arc shape, in described connection end, disposes described transfer tube according to the circular arc portion of the cross-sectional shape of described transfer tube along the mode of the semi arch part of the cross-sectional shape of described groove width small.
Further, preferably, described groove width small is formed with the scarp that relative described trench bottom surfaces tilts by plane trench bottom surfaces, direction is flowed along with diminishing away from described transfer tube at described melten glass in the zone on described scarp, the cross-sectional shape of described transfer tube is toroidal, and the described groove width of described groove width small narrows down corresponding to described toroidal and groove width bottom surface stage or the continuity towards described groove.
Under these situations, near the enlarged degree of the flowing path section of the melten glass the trench bottom surfaces of the described groove of flowing through reduced than in the past, was difficult to produce the stop of the fluid of melten glass.Therefore, be difficult to produce devitrification or the heterogeneous blank of glass, can make the uniform high-quality plate of glass of no brush line and thickness of slab.
Even the strain point of described melten glass is more than 655 ℃, also can be applicable to the manufacturing of described sheet glass.
Such glass is the high glass of strain point, and liquidus temperature (devitrification temperature) tends to increase.When to use this strain point be glass more than 655 ℃, the suitable viscosity of the melten glass in the molding procedure (for example being more than 40000 pools) approached with the liquid phase viscosity of glass, therefore devitrification easily.Particularly, if melten glass stops when moulding, then the composition of formed body is from formed body surface stripping, easier devitrification.During the manufacturing of described sheet glass, the fluid of melten glass is difficult to rest on the described groove of described formed body, therefore can suppress the devitrification of glass.
Even the strain point of described melten glass is the glass more than 675 ℃, also can be applicable to the manufacturing of described sheet glass, be difficult to produce devitrification.In addition, even the strain point of described melten glass is the glass more than 680 ℃, also can be applicable to the manufacturing of described sheet glass, be difficult to produce devitrification.Further, even the strain point of described melten glass is the glass more than 690 ℃, also can be applicable to the manufacturing of described sheet glass, be difficult to produce devitrification.
The liquid phase viscosity that also can make described melten glass is more than 45000 pools.Such glass is close to the viscosity of the melten glass that is fit in the molding procedure, so easy devitrification.Particularly, rest in the formed body as if melten glass, then easier devitrification.But in the manufacturing installation of above-mentioned sheet glass, the fluid of melten glass is difficult to rest on the described groove of described formed body, even therefore liquid phase viscosity is the situation of 45000 pools, also can suppress the devitrification of glass, makes sheet glass.
If the liquid phase viscosity of described melten glass is more than 50000 pools, then by being applicable to the manufacturing of described sheet glass, more be difficult to produce devitrification; Further, if the liquid phase viscosity of described melten glass is more than 60000 pools, then by being applicable to the manufacturing of described sheet glass, further be difficult to produce devitrification, can make high-quality sheet glass.
In addition, described sheet glass for example is the glass for flat panel display plate, for example is the sheet glass that p-Si (low temperature polycrystalline silicon) TFT formation usefulness or oxide semiconductor form usefulness.
P-Si (low temperature polycrystalline silicon) TFT formation usefulness or oxide semiconductor form the strain point height of the sheet glass of usefulness.If strain point height then liquidus temperature has the tendency that increases, liquid phase viscosity (in the viscosity of liquidus temperature) tends to step-down.Therefore, the difference of the viscosity of the melten glass that foliated glass moulding sometimes is required (moulding viscosity) and liquid phase viscosity diminish or moulding viscosity ratio liquid phase viscosity big, its result causes the glass devitrification easily.Particularly, rest on formed body as if melten glass, then easier devitrification.Therefore, the manufacturing of the sheet glass of the aforesaid way that will flow smoothly even can make melten glass be difficult to rest on the groove of formed body is applicable to that glass for flat panel display plate, particularly p-Si (low temperature polycrystalline silicon) TFT formation is used or the sheet glass of oxide semiconductor formation usefulness, also is difficult to produce devitrification.
The effect of utility model
Manufacturing installation according to the sheet glass of aforesaid way, when using formed body to carry out the moulding of melten glass, the fluid of the melten glass of the groove by formed body is difficult to stop, and can not produce devitrification and heterogeneous blank in melten glass, can make high-quality sheet glass.
Description of drawings
Fig. 1 is the figure of an example of operation of manufacture method that the glass substrate of present embodiment is shown.
Fig. 2 is the figure of an example that fuses the device of operation～cut-out operation in the schematically illustrated present embodiment.
Fig. 3 (a) is the exploded perspective view that the connection portion of formed body in the present embodiment and glass supply-pipe is shown; Fig. 3 (b) be glass supply-pipe that present embodiment is shown when being connected with groove the connection end and the frontview of the relative position between the groove; Fig. 3 (c) be glass supply-pipe that present embodiment is shown when being connected with groove the connection end and the vertical view of the relative position between the groove.
Fig. 4 is connection end when in the past enlargement of pipe portion being shown being connected with groove and the frontview of the relative position between the groove.
Fig. 5 (a) and (b) are the groove of explanation in the variation and the figure of the connection state of glass supply-pipe.
Embodiment
Below the manufacturing installation of sheet glass of the present utility model is elaborated.Fig. 1 is the figure of an example of operation of manufacture method that the glass substrate of present embodiment is shown.
(the whole summary of the manufacture method of glass substrate)
The manufacture method of glass substrate mainly has fusion operation (ST1), clarification operation (ST2), the operation that homogenizes (ST3), supplies with operation (ST4), molding procedure (ST5), slow refrigerating work procedure (ST6) and cuts off operation (ST7).In addition, also have to grind and cut operation, grinding step, matting, inspection operation, packaging process etc.; In packaging process, carried out the carrying glass sheet more than 2 of lamination to the staff of recipient.
Fusion operation (ST1) is carried out in the fusion groove.In the fusion operation, be fed into frit on the liquid level that is accumulated in the melten glass of fusion in the groove and heat to make melten glass.Further, make melten glass flow to lower procedure from the spout of 1 bottom of the inside side walls that is arranged on the fusion groove.
The heating of the melten glass of fusion groove also can utilize burner to provide flame that frit is fused except the method for melten glass self energising being carried out spontaneous heating and heating complementaryly.Need to prove, be added with finings in the frit.Be not particularly limited as finings, known have a SnO
2, As
2O
3, Sb
2O
3Deng.But, from reducing the viewpoint of carrying capacity of environment, can use SnO
2(stannic oxide) is as finings.
Clarification operation (ST2) is carried out in finer at least.In the clarification operation, the melten glass in the clarifying tank is heated up, what contain in the melten glass thus contains O
2, CO
2Or SO
2Bubble can absorb the O that the reduction reaction because of finings generates
2And grow up, thereby bubble floating to the liquid level of melten glass is emitted.Further, in the clarification operation, the temperature of melten glass is descended, thereby the reducing substance that the reduction reaction by finings is obtained carry out oxidizing reaction.Thus, the O in the remaining bubble in the melten glass
2Be absorbed in the melten glass bubble collapse again etc. gaseous constituent.Oxidizing reaction and reduction reaction based on finings can be undertaken by the temperature of control melten glass.Need to prove that the clarification operation can be used the vacuum deaerator mode, thereby this vacuum deaerator mode is to form the space of reduced atmosphere and the bubble that exists in the melten glass is grown up to carry out deaeration in clarifying tank in reduced atmosphere.Under this situation, also be effective even do not use finings.Need to prove, used the defecation method of stannic oxide as finings in the clarification operation.
In the operation that homogenizes (ST3), use agitator to stirring by the melten glass in the steel basin of supplying with from the extended pipe arrangement of clarifying tank, thereby carry out homogenizing of glass ingredient.Can reduce thus and form uneven as the glass of the reason of brush line etc.
In supplying with operation (ST4), by from the extended pipe arrangement of steel basin melten glass being supplied to shaped device.
In shaped device, carry out molding procedure (ST5) and slow refrigerating work procedure (ST6).
In molding procedure (ST5), melten glass is shaped to foliated glass, form the fluid of foliated glass.Moulding can be used overflow downdraw.
In slow refrigerating work procedure (ST6), cool off so that the foliated glass that moulding is flowed for the thickness of expectation, do not produce internal strain, further do not produce warpage.
In cutting off operation (ST7), in shut-off device, will be cut to the length of regulation from the foliated glass that shaped device is supplied with, thereby obtain tabular sheet glass.Sheet glass after the cut-out further is cut to the size of regulation, forms the glass substrate of target size.Afterwards, carry out the grinding of end face of glass substrate and cut, grind, carry out the cleaning of glass substrate, further, check unusual defectives such as having or not bubble after, the sheet glass of passed examination product is packed as the finished product.
Fig. 2 is the figure of an example that fuses the device of operation (ST1)～cut-out operation (ST7) in the schematically illustrated present embodiment.As shown in Figure 2, mainly have fusing device 100, shaped device 200 and shut-off device 300 in this device.Fusing device 100 has fusion groove 101, clarifying tank 102, steel basin 103 and glass supply-pipe 104,105,106.
In fusing device shown in Figure 2 101, the input of frit is to use hopper 101d to carry out.In the finer 102, thereby the temperature of adjusting melten glass MG utilizes the redox reaction of finings to carry out the clarification of melten glass MG.Further, in steel basin 103, thereby utilize agitator 103a to stir melten glass MG it is homogenized.In shaped device 200, foliated glass SG is obtained by melten glass MG moulding by the overflow downdraw of having used formed body 210.
(the glass supply-pipe is connected with formed body)
Fig. 3 (a) is the exploded perspective view that the connection portion of formed body 210 and glass supply-pipe 106 is shown; Fig. 3 (b) is connection end when glass supply-pipe 106 being shown being connected with groove 210a and the frontview of the relative position between the groove 210a; Fig. 3 (c) is its vertical view.
The angle that never produces devitrification and brush line is considered, preferably smoothly melten glass MG (fluid of melten glass MG is difficult to stop) is supplied to the groove 210a of such formed body 210.The viscosity (moulding viscosity) of the melten glass during close to molding procedure for liquidus temperature height, liquid phase viscosity particularly, or liquid phase viscosity must avoid the fluid of melten glass MG to rest on groove 210a less than the glass of the so easy devitrification of moulding viscosity.
The groove 210a of formed body 210 has groove width constant portion and groove width small along the gash depth direction of groove 210a from top.The groove width constant portion is to be constant part with the location independent of gash depth direction and groove width.The groove width small part that to be groove width narrow down towards gash depth direction stage or continuity.Consider that from the level and smooth aspect of fluid that makes melten glass MG the preferred groove width of groove width small narrows down towards gash depth direction continuity.The groove width small is with respect to the groove of groove width constant portion and be arranged on the trench bottom surfaces side of gash depth direction.The groove width small is formed with the scarp 210e that relative this trench bottom surfaces 210d tilts by plane trench bottom surfaces 210d, the zone of scarp 210e at the mobile directions X of melten glass MG along with reducing away from glass supply-pipe 106.
On the other hand, the glass supply-pipe 106 that is connected with the groove 210a of formed body 210 is transfer tubes, the tabular end 106b that it comprises the glass supply-pipe main body 106a with constant flowing path section and is arranged on the end of glass supply-pipe main body 106a.The rounded shape of flowing path section of glass supply-pipe main body 106a.In addition, as the circular diameter of the flowing path section shape of the glass supply-pipe main body 106a groove width less than the groove width constant portion of groove 210a.
So, in the connection end that groove 210a is connected with glass supply-pipe 106, groove 210a has the groove width small that groove width narrows down towards gash depth direction stage or continuity.At the mobile directions X of the melten glass MG of formed body 210, the groove width of this groove width small (at the groove width of gash depth direction same position) along with increasing away from glass supply-pipe 106, becomes identical with the groove width of groove width constant portion.Therefore, the groove width of groove width small is more little the closer to glass supply-pipe 106, thereby the flowing path section that is circulated to the melten glass MG of groove 210a from glass supply-pipe 106 can sharply not enlarged with glass supply-pipe 106 contact positions.
Shown in Fig. 3 (b), be provided with the groove width small corresponding near the shape the trench bottom surfaces 210d in the cross-sectional shape of the toroidal of glass supply-pipe main body 106a, therefore can suppress from glass supply-pipe 106 degree that the flowing path section of the melten glass MG the trench bottom surfaces of groove 210a near enlarges of flowing through.Further, near the melten glass MG the trench bottom surfaces of the groove 210a that flows through advances along directions X according to the cross-sectional shape of groove width small, follows in this, and groove width enlarges gradually, finally forms the groove width of groove width constant portion.That is, little by little enlarge flowing path section, the therefore stop that is difficult to produce melten glass MG from the flow through melten glass MG of groove 210a of glass supply-pipe 106.
Fig. 4 be illustrate do not have above-mentioned groove width small and have rectangular shape in the past cross-sectional shape groove 210a ' and have the figure of relation of glass supply-pipe 106 ' of the cross-sectional shape of toroidal.Compare with the embodiment shown in Fig. 3 (b), in the example depicted in fig. 4, the degree that the flowing path section of the melten glass MG that flows at regional Y enlarges is bigger.Therefore, stop easily near the flow through fluid of the melten glass MG the regional Y of groove 210a ' of glass supply-pipe 106 '.
(variation)
Fig. 5 (a), Fig. 5 (b) illustrate the variation with groove shape different from the embodiment described above.Shown in Fig. 5 (a), the cross section of the coupling end that is connected with glass supply-pipe 106 from groove 210a, groove 210a has the groove width constant portion of top among the figure that is arranged at groove 210a and is arranged at the groove width small of below.The cross-sectional shape of groove width small is half-circle-arc shape, and it is formed by curved surface 210f corresponding to the glass supply-pipe main body 106a of the cross-sectional shape with toroidal.Glass supply-pipe main body 106a arranges in the mode of coupling end along the circular arc portion (curved surface 210f) of the cross-sectional shape of groove width small according to the circular arc portion of the cross-sectional shape of glass supply-pipe main body 106a.In addition, shown in Fig. 5 (b), the zone of the curved surface 210f of groove 210a is more away from glass supply-pipe 106 (glass supply-pipe main body 106a) (more advancing to directions X), and then the zone of curved surface 210f narrows down gradually.That is, at the flow direction of the melten glass MG of formed body 210, the groove width of groove width small is along with increasing away from glass supply-pipe 106.
In this variation, same with above-mentioned embodiment, the groove width small is arranged on the trench bottom surfaces side of gash depth direction of the groove 210a of groove width constant portion, therefore is difficult to produce near the stop of fluid of the melten glass MG the curved surface 210f of groove 210a of flowing through especially.Therefore, this variation is difficult to produce devitrification or the heterogeneous blank of glass, can make the uniform high-quality plate of glass of no brush line and thickness of slab.
In addition, the zone of the curved surface 210f of groove 210a is more away from glass supply-pipe 106 (glass supply-pipe main body 106a) (more advancing to directions X), and then the zone of curved surface 210f narrows down.Therefore, the stream section of the melten glass MG of the groove 210a that flows through enlarges gradually and becomes the flowing path section of groove width constant portion, the stop of flowing that therefore is difficult to produce melten glass MG.Therefore, present embodiment is difficult to produce devitrification or the heterogeneous blank of glass, can make the uniform high-quality plate of glass of no brush line and thickness of slab.
(characteristic of sheet glass, suitable)
The sheet glass of present embodiment is used under the situation of glass for flat panel display plate, can enumerates the example of coming the hybrid glass raw material according to the mode with following glass composition.
The non-alkali glass that contains following compositions.
SiO
2: 50 quality %～70 quality %,
Al
2O
3: 0 quality %～25 quality %,
B
2O
3: 1 quality %～15 quality %,
MgO:0 quality %～10 quality %,
CaO:0 quality %～20 quality %,
SrO:0 quality %～20 quality %,
BaO:0 quality %～10 quality %,
RO:5 quality %～30 quality % (wherein, R is the total amount of Mg, Ca, Sr and Ba)
Need to prove, be non-alkali glass in the present embodiment, contains alkali-metal micro-alkali-containing glass but glass substrate also can be trace.Contain under the alkali-metal situation R '
2It is above and 0.5 quality % following, the above and 0.5 quality % following (wherein, R ' is at least a kind that is selected among Li, Na and the K, and is the material that glass substrate contains) of 0.20 quality % more preferably that the total content of O is preferably 0.10 quality %.Certainly, R '
2The total amount of O can be lower than 0.10 quality %.
In addition, under the situation of the manufacturing installation of the sheet glass of use present embodiment, except above-mentioned each composition, glass component can also contain the SnO of 0.01 quality %～1 quality % (being preferably 0.01 quality %～0.5 quality %)
2, 0 quality %～0.2 quality % (being preferably 0.01 quality %～0.08 quality %) Fe
2O
3, consider carrying capacity of environment, can be according to not containing As in fact
2O
3, Sb
2O
3And the mode of PbO is modulated frit.
In addition, in recent years, the further height that shows for the picture of realizing flat-panel monitor becomes more meticulous, and requires to use p-Si (low temperature polycrystalline silicon) TFT or oxide semiconductor but not the indicating meter of α-Si (non-crystalline silicon) TFT.In the formation operation of p-Si (low temperature polycrystalline silicon) TFT or oxide semiconductor, have the heat treatment step higher than the formation process temperature of α-SiTFT herein.Therefore, require its percent thermal shrinkage little for the sheet glass that is formed with p-SiTFT or oxide semiconductor.In order to reduce percent thermal shrinkage, preferably improve strain point, but as mentioned above, the glass that strain point is high tends to that liquidus temperature increases, liquid phase viscosity descends.That is, above-mentioned liquid phase viscosity is close to the suitable viscosity of the melten glass in the molding procedure.Therefore, in order to suppress devitrification, strong request makes the fluid of melten glass MG not rest on the groove 210a of formed body 210 more.In present embodiment and the variation, the fluid of melten glass MG is difficult to stop.Therefore, the manufacturing installation of the sheet glass of present embodiment can be applicable to that also for example having used strain point is the sheet glass of the glass more than 655 ℃.Particularly used that the strain point that is suitable for p-SiTFT or oxide semiconductor is more than 655 ℃, strain point is more than 680 ℃, further strain point is under the situation of sheet glass of the glass more than 690 ℃, utilizes the manufacturing installation of the sheet glass of present embodiment to be difficult to produce devitrification.
In addition, even liquid phase viscosity is the above glass of 45000 pools, further liquid phase viscosity is that glass, particularly liquid phase viscosity more than 50000 pools is under 60000 the situations of sheet glass of glass more than mooring having used, also can use the manufacturing installation of the sheet glass of present embodiment, be difficult to produce devitrification.
Be more than 655 ℃ with strain point or liquid phase viscosity is the above glass of 45000 pools when being used for sheet glass, can enumerate: form as glass, % represents with quality, and for example sheet glass can contain following composition.
Preferably contain following composition, and mass ratio (SiO
2+ Al
2O
3)/B
2O
3Non-alkali glass or micro-alkali-containing glass in 7～20 scopes.
SiO
252 quality %～78 quality %
Al
2O
33 quality %～25 quality %
B
2O
33 quality %～15 quality %
RO (wherein, R is at least a kind that is selected from whole compositions that the sheet glass of Mg, Ca, Sr and Ba contains) 3 quality %～20 quality %
Further, in order to improve strain point more, preferred mass is than (SiO
2+ Al
2O
3)/RO is more than 7.5.Further, in order to improve strain point, preferably make β-OH value be 0.1mm
-1～0.3mm
-1Further, prevent simultaneously that in order to realize high strain-point liquid phase viscosity from descending, preferably making CaO/RO is more than 0.65.Consider carrying capacity of environment, can be according to not containing As in fact
2O
3, Sb
2O
3And PbO modulates frit.
Further, except mentioned component, for the characteristic of various physical propertys, fusion, clarification and the moulding of regulating glass, the glass that is used for the sheet glass of present embodiment can contain various other oxide compounds.Example as other such oxide compound is not limited to following material, but can enumerate SnO
2, TiO
2, MnO, ZnO, Nb
2O
5, MoO
3, Ta
2O
5, WO
3, Y
2O
3And La
2O
3Herein, strict especially to the requirement of bubble in the glass for flat panel display plates such as liquid-crystal display or OLED display, therefore contain the big SnO of clarifying effect at least in the preferred above-mentioned oxide compound
2
Supply source for above-mentioned RO can use nitrate or carbonate.Need to prove, in order to improve the oxidisability of melten glass, more expect to be suitable for the ratio use nitrate of operation as the supply source of RO.
More than, manufacturing installation to sheet glass of the present utility model has been described in detail, but the utility model is not limited to above-mentioned embodiment, in the scope that does not break away from juche idea of the present utility model, can carry out various improvement and change, this is from needn't.
Nomenclature
100 fusing devices
101 fusion grooves
The 101d hopper
102 clarifying tanks
103 steel basins
The 103a agitator
104,105,106,106 ' glass supply-pipe
106a glass supply-pipe main body
106b enlargement of pipe portion
200 shaped devices
210 formed bodys
210a, 210a ' groove
The 210b sidewall
The 210c lower front end
The 210d trench bottom surfaces
The 210e scarp
The 210f curved surface
300 shut-off devices
Claims (6)
1. the manufacturing installation of a sheet glass, it is the sheet glass manufacturing installation of making sheet glass, it is characterized in that,
The manufacturing installation of this sheet glass possesses:
The fusion groove wherein, thereby is made melten glass with the frit fusion;
Shaped device wherein, while the groove that makes described melten glass flow to formed body utilizes overflow downdraw that described melten glass is carried out moulding, thereby is made foliated glass; With
Transfer tube, it is arranged between described fusion groove and the described shaped device, is used for described melten glass is supplied to described formed body,
In the connection end that the described groove of described formed body is connected with described transfer tube, described groove has the groove width small that groove width narrows down towards depth direction stage or the continuity of described groove,
In the mobile direction of the melten glass of described formed body, the groove width of described groove width small is along with becoming big away from described transfer tube.
2. the manufacturing installation of sheet glass as claimed in claim 1, wherein, it is constant groove width constant portion that the described groove of described formed body has with the location independent of the depth direction of described groove and groove width, and described groove width small is arranged on the trench bottom surfaces side of the gash depth direction of described groove with respect to described groove width constant portion.
3. as the manufacturing installation of claim 1 or the described sheet glass of claim 2, wherein, described groove width small is formed by plane trench bottom surfaces and the scarp that tilts with respect to described trench bottom surfaces, the zone on described scarp in the mobile direction of described melten glass along with diminishing away from described transfer tube.
4. as the manufacturing installation of claim 1 or the described sheet glass of claim 2, wherein,
The cross-sectional shape of described transfer tube is toroidal,
The described groove width of described groove width small narrows down corresponding to described toroidal and groove width bottom surface stage or the continuity towards described groove.
5. the manufacturing installation of sheet glass as claimed in claim 4, wherein,
The cross-sectional shape of described groove width small is half-circle-arc shape,
In described connection end, dispose described transfer tube according to the circular arc portion of the cross-sectional shape of described transfer tube along the mode of the semi arch part of the cross-sectional shape of described groove width small.
6. as the manufacturing installation of claim 1 or the described sheet glass of claim 2, wherein,
Described groove width small is formed by the trench bottom surfaces on plane and the scarp that tilts with respect to described trench bottom surfaces, the zone on described scarp in the mobile direction of described melten glass along with diminishing away from described transfer tube,
Further, the cross-sectional shape of described transfer tube is toroidal,
The described groove width of described groove width small narrows down corresponding to described toroidal and groove width bottom surface stage or the continuity towards described groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-090411 | 2012-04-11 | ||
| JP2012090411A JP5651634B2 (en) | 2012-04-11 | 2012-04-11 | Manufacturing method of glass plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203128398U true CN203128398U (en) | 2013-08-14 |
Family
ID=48936396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200780979U Expired - Lifetime CN203128398U (en) | 2012-04-11 | 2013-02-20 | Glass plate manufacturing device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5651634B2 (en) |
| KR (1) | KR101513793B1 (en) |
| CN (1) | CN203128398U (en) |
| TW (1) | TWI541205B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5921742B2 (en) * | 2014-03-29 | 2016-05-24 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass plate manufacturing method and glass plate manufacturing apparatus |
| TWI750256B (en) * | 2016-11-22 | 2021-12-21 | 美商康寧公司 | Forming bodies for forming continuous glass ribbons and glass forming apparatuses comprising the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006248855A (en) * | 2005-03-11 | 2006-09-21 | Nippon Electric Glass Co Ltd | Formation apparatus for plate glass and method for forming plate glass |
| JP2009132595A (en) * | 2007-10-29 | 2009-06-18 | Nippon Electric Glass Co Ltd | Refractory material for glass production, method for producing the same, glass melting furnace, and method for producing glass article |
| JP5751439B2 (en) * | 2010-08-17 | 2015-07-22 | 日本電気硝子株式会社 | Alkali-free glass |
-
2012
- 2012-04-11 JP JP2012090411A patent/JP5651634B2/en active Active
-
2013
- 2013-02-20 CN CN2013200780979U patent/CN203128398U/en not_active Expired - Lifetime
- 2013-03-05 KR KR1020130023232A patent/KR101513793B1/en active Active
- 2013-03-21 TW TW102110100A patent/TWI541205B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TW201343572A (en) | 2013-11-01 |
| TWI541205B (en) | 2016-07-11 |
| JP5651634B2 (en) | 2015-01-14 |
| JP2013216551A (en) | 2013-10-24 |
| KR101513793B1 (en) | 2015-04-20 |
| KR20130115118A (en) | 2013-10-21 |
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