JPH11302029A - Method for transporting ribbon-like glass and production of sheet glass - Google Patents
Method for transporting ribbon-like glass and production of sheet glassInfo
- Publication number
- JPH11302029A JPH11302029A JP11383098A JP11383098A JPH11302029A JP H11302029 A JPH11302029 A JP H11302029A JP 11383098 A JP11383098 A JP 11383098A JP 11383098 A JP11383098 A JP 11383098A JP H11302029 A JPH11302029 A JP H11302029A
- Authority
- JP
- Japan
- Prior art keywords
- ribbon
- glass
- shaped glass
- vapor
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 title claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 24
- 239000005357 flat glass Substances 0.000 title description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000006124 Pilkington process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000008020 evaporation Effects 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 238000007372 rollout process Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 239000006060 molten glass Substances 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 5
- 238000010583 slow cooling Methods 0.000 description 4
- 230000009477 glass transition Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- -1 for example Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000011850 water-based material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/181—Materials, coatings, loose coverings or sleeves thereof
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/188—Rollers specially adapted for supplying a gas, e.g. porous or foraminous rollers with internal air supply
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、新規なリボン状ガ
ラスの搬送方法および該搬送方法を用いた板ガラス製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for transporting ribbon-shaped glass and a method for manufacturing a sheet glass using the method.
【0002】[0002]
【従来の技術】現在最も普及している板ガラス製造方法
は、所定原料を溶解窯の中で溶解して溶融ガラスとした
後溶融ガラスを溶融金属浴に導入し、機械的な外力を用
いて縦横方向に延展・移動させてリボン状ガラスとし、
その後徐冷窯に搬送して冷却し平滑表面を有する板ガラ
スを得る、いわゆるフロート法である。フロート法の採
用はそれ以外の板ガラス製造方法であるロールアウト法
等に比べ、板ガラス表面の平滑度を格段に向上させ、そ
れまで必須であった磨きの工程を不要にした。そのた
め、平滑で透明な板ガラスの製造方法の主流となってい
る。一方、ロールアウト法は溶融ガラスを上下一対の成
形用ロールの間に通してリボン状ガラスとし、その後徐
冷窯に搬送して冷却する板ガラス製造方法である。ロー
ルアウト法は、模様の入ったガラスや金属線や網などを
挟み込んだ耐火用ガラスの製造にもっとも適した方法と
して現在でも用いられている。2. Description of the Related Art At present, the most widespread sheet glass manufacturing method is to melt a predetermined raw material in a melting furnace to form a molten glass, then introduce the molten glass into a molten metal bath, and use a mechanical external force to apply a vertical and horizontal width to the molten metal bath. Extend and move in the direction to make ribbon-shaped glass,
Thereafter, it is conveyed to a slow cooling kiln and cooled to obtain a sheet glass having a smooth surface, which is a so-called float method. The adoption of the float method significantly improved the smoothness of the surface of the sheet glass and eliminated the necessity of the polishing step, which had been indispensable until then, as compared with the other sheet glass manufacturing methods such as the roll-out method. Therefore, it has become the mainstream of the method for producing a smooth and transparent sheet glass. On the other hand, the roll-out method is a sheet glass manufacturing method in which a molten glass is passed between a pair of upper and lower forming rolls to form a ribbon-shaped glass, which is then conveyed to a slow cooling kiln and cooled. The roll-out method is still used as a method most suitable for producing glass with a pattern, fire-resistant glass sandwiching a metal wire or a net, or the like.
【0003】フロート法においては、溶融金属浴内で成
形されたリボン状ガラスは溶融金属浴から引き出された
後ロールによって徐冷窯まで搬送される。ロールアウト
法においても、ロールアウト成形されたリボン状ガラス
はロールによって徐冷窯まで搬送される。また、リボン
状ガラスは徐冷窯においてもロールで搬送され、徐冷点
程度から常温近くまで冷却される。In the float method, a ribbon-shaped glass formed in a molten metal bath is drawn out of the molten metal bath and then conveyed by a roll to a lehr. Also in the roll-out method, the ribbon-shaped glass formed by roll-out is transported to the annealing furnace by a roll. The ribbon-shaped glass is also conveyed by rolls in an annealing furnace, and cooled from about the annealing point to near normal temperature.
【0004】[0004]
【発明が解決しようとする課題】しかし、前記方法には
いくつかの欠点や問題があり、改善が望まれている。す
なわちフロート法においては、溶融金属浴上で平滑化平
坦化された面性状を維持するために、成形されて溶融金
属浴から引出されたリボン状ガラスの温度は軟化点以下
でなければならない。一方、成形されたリボン状ガラス
は溶融金属浴から引出される際、溶融金属浴を構成する
耐火物槽の壁を越えなければならない。そのため溶融金
属浴の出口付近においては、成形されたリボン状ガラス
の温度は耐火物槽の壁を越える際に生じる変形を修復す
るためにガラス転移点以上でなければならない。However, the above method has some disadvantages and problems, and an improvement is desired. That is, in the float method, the temperature of the ribbon-shaped glass formed and drawn out of the molten metal bath must be lower than the softening point in order to maintain the smoothed and flattened surface properties on the molten metal bath. On the other hand, when the formed ribbon-shaped glass is drawn from the molten metal bath, it has to cross the wall of the refractory bath constituting the molten metal bath. Therefore, near the outlet of the molten metal bath, the temperature of the formed ribbon-shaped glass must be equal to or higher than the glass transition point in order to repair the deformation that occurs when crossing the wall of the refractory tank.
【0005】溶融金属浴の出口付近における前記リボン
状ガラスの温度を高目すなわち軟化点程度に設定する
と、リボン状ガラスの固化が進まず、リボン状ガラスを
溶融金属浴から引き出して搬送する際にロールと接触し
て「ローラーインプリント」と呼ばれる欠点が発生す
る。この欠点は、ロール表面の凸凹がリボン状ガラスに
転写されたものである。逆に、溶融金属浴の出口付近に
おける前記リボン状ガラスの温度を低目すなわちガラス
転移点程度に設定すると、リボン状ガラスの固化が進み
すぎ、リボン状ガラスに亀裂が生じたり破断が生じやす
くなり、さらに、ロールとの接触によって傷が発生し、
後工程でのトラブルにつながることが多かった。従って
溶融金属浴の出口付近におけるリボン状ガラスやロール
の温度管理が非常に難しかった。If the temperature of the ribbon-shaped glass near the outlet of the molten metal bath is set to a high temperature, that is, about the softening point, the solidification of the ribbon-shaped glass does not proceed, and when the ribbon-shaped glass is drawn out of the molten metal bath and transported. A defect called "roller imprint" occurs upon contact with the roll. The disadvantage is that irregularities on the roll surface are transferred to the ribbon glass. Conversely, if the temperature of the ribbon-shaped glass near the outlet of the molten metal bath is set to a low temperature, that is, about the glass transition point, the solidification of the ribbon-shaped glass proceeds excessively, and the ribbon-shaped glass is easily cracked or broken. , In addition, scratches are caused by contact with the roll,
This often led to trouble in later processes. Therefore, it has been very difficult to control the temperature of the ribbon-shaped glass and roll near the outlet of the molten metal bath.
【0006】また、ロールアウト法においても、本質的
にフロート法の場合と同様な、ロールとの接触に基づく
欠点やトラブルが発生しやすかった。さらに、徐冷窯内
でのロールとの接触に基づく欠点やトラブルも発生しや
すかった。本発明は、板ガラスの製造工程において、リ
ボン状ガラス、特に高温のリボン状ガラスと搬送用ロー
ルとの接触によって発生している問題を解決するために
なされたものである。[0006] Also, in the roll-out method, defects and troubles due to contact with the roll, which are essentially the same as in the case of the float method, are likely to occur. Further, defects and troubles caused by the contact with the rolls in the annealing furnace were likely to occur. SUMMARY OF THE INVENTION The present invention has been made to solve a problem caused by contact between a ribbon-shaped glass, in particular, a high-temperature ribbon-shaped glass and a transfer roll, in a manufacturing process of a sheet glass.
【0007】[0007]
【課題を解決するための手段】本発明は、リボン状ガラ
スをその軟化点以下の温度で搬送する方法であって、リ
ボン状ガラスと該リボン状ガラスを搬送時に支持する支
持体との間に蒸気の膜が存在し、該蒸気が該支持体内部
に存在する液体(以下蒸気膜形成剤という。)の蒸発に
よって生成するリボン状ガラスの搬送方法、フロート法
によって成形されたリボン状ガラスを、前記リボン状ガ
ラスの搬送方法を用いて溶融金属浴から引出し徐冷窯ま
で搬送する板ガラス製造方法、および、ロールアウト法
によって成形されたリボン状ガラスを、前記リボン状ガ
ラスの搬送方法を用いて徐冷窯まで搬送する板ガラス製
造方法、を提供する。SUMMARY OF THE INVENTION The present invention relates to a method of transporting a ribbon of glass at a temperature lower than its softening point, wherein a ribbon glass and a support for supporting the ribbon glass during transportation are provided. A method of transporting a ribbon-like glass produced by evaporation of a liquid (hereinafter referred to as a vapor film-forming agent) in which a vapor film is present and the vapor present inside the support, a ribbon-like glass formed by a float method, A sheet glass manufacturing method of drawing from a molten metal bath using the method of transporting the ribbon-shaped glass and transporting it to a slow cooling kiln, and gradually reducing a ribbon-shaped glass formed by a roll-out method using the method of transporting the ribbon-shaped glass. Provided is a method for manufacturing a sheet glass to be transported to a cold kiln.
【0008】[0008]
【発明の実施の形態】本発明において、温度が軟化点以
下であるリボン状ガラスはその支持体との間に存在する
蒸気の膜と接触し、前記支持体との直接接触がない状態
で搬送される。したがって、リボン状ガラスと支持体と
の接触にともなう欠点やトラブルが発生するおそれは少
ない。なお、リボン状ガラス搬送時の変形が問題となる
のでリボン状ガラスの温度は軟化点以下でなければなら
ない。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a ribbon-shaped glass whose temperature is lower than the softening point comes into contact with a vapor film existing between the support and its support, and is conveyed without direct contact with the support. Is done. Therefore, there is little possibility that defects or troubles occur due to the contact between the ribbon-shaped glass and the support. The deformation of the ribbon-shaped glass during transfer poses a problem, so the temperature of the ribbon-shaped glass must be lower than the softening point.
【0009】前記蒸気は、前記支持体内部に存在する液
体(以下蒸気膜形成剤という。)の蒸発によって生成す
る。蒸気膜形成剤の蒸発は、支持体のリボン状ガラスに
近接する面(以下接触面という。)で起きてもよく、接
触面近傍の支持体内部で起きてもよい。蒸発のために必
要な熱量は高温のリボン状ガラスから供給される。この
観点からはリボン状ガラスの温度は高い方がよい。好ま
しくは300℃以上、より好ましくはガラス転移点以上
である。[0009] The vapor is generated by evaporation of a liquid (hereinafter referred to as a vapor film forming agent) existing inside the support. Evaporation of the vapor film forming agent may occur on a surface of the support close to the ribbon-shaped glass (hereinafter referred to as a contact surface) or may occur inside the support near the contact surface. The amount of heat required for evaporation is supplied from hot ribbon glass. From this viewpoint, the higher the temperature of the ribbon-shaped glass, the better. It is preferably at least 300 ° C., more preferably at least the glass transition point.
【0010】前記蒸気膜形成剤は前記支持体内部に、蒸
気発生量とバランスするように供給される。蒸気膜形成
剤は高温のリボン状ガラスによる加熱によって蒸発する
物質であれば特に限定されず、有機、無機の各種液体を
使用できる。しかし、その蒸気がガラス品質を損なうほ
どにはガラスと化学的に反応せず、リボン状ガラス搬送
温度において熱的に安定であり、また不燃性であるもの
が好ましい。また、支持体への供給の操作性を低下させ
ないためには、蒸気膜形成剤の沸点は300℃未満であ
ることが好ましく、より好ましくは200℃未満であ
る。以上のような点を考慮すると、化学的に安定であ
り、毒性がなく、取り扱いが容易であり、また安価であ
る水もしくは水を主成分とするものを用いることが特に
好ましい。なお、支持体に供給する際の蒸気膜形成剤の
温度は沸点以下であれば特に限定されない。[0010] The vapor film forming agent is supplied to the inside of the support so as to balance the amount of generated steam. The vapor film forming agent is not particularly limited as long as it is a substance that evaporates by heating with a high-temperature ribbon glass, and various organic and inorganic liquids can be used. However, it is preferred that the vapor does not chemically react with the glass to such an extent as to impair the glass quality, is thermally stable at the ribbon-like glass transport temperature, and is nonflammable. Further, in order not to lower the operability of the supply to the support, the boiling point of the vapor film forming agent is preferably less than 300 ° C, more preferably less than 200 ° C. In view of the above points, it is particularly preferable to use water or water-based materials which are chemically stable, have no toxicity, are easy to handle, and are inexpensive. The temperature of the vapor film forming agent when supplied to the support is not particularly limited as long as it is equal to or lower than the boiling point.
【0011】本発明におけるリボン状ガラスの支持体
は、リボン状ガラスおよび作業雰囲気に悪影響を与えな
ければ、特に限定されない。その内部を蒸気膜形成剤が
透過できるものが好ましい。支持体の材質は、蒸気膜形
成剤と親和性が高く、蒸気膜形成剤により湿潤し支持体
内部に充分な量の蒸気膜形成剤を包含できる材質である
ことが好ましい。支持体が蒸気膜形成剤を包含できる量
の大小が、蒸気発生量の大小を左右するからである。す
なわち、蒸気膜形成剤を包含できる量が小さすぎると、
一時的に蒸気発生量が過大になった場合支持体内部の蒸
気膜形成剤が一時的に枯渇し蒸気発生が途絶えるおそれ
がある。The support of the ribbon glass in the present invention is not particularly limited as long as it does not adversely affect the ribbon glass and the working atmosphere. A material through which a vapor film forming agent can permeate is preferred. The material of the support is preferably a material that has a high affinity for the vapor film forming agent and can wet the vapor film forming agent and include a sufficient amount of the vapor film forming agent inside the support. This is because the amount of the support that can contain the vapor film forming agent determines the amount of generated steam. That is, if the amount that can include the vapor film forming agent is too small,
If the amount of generated steam temporarily becomes excessive, the vapor film forming agent inside the support may be temporarily depleted and the generation of steam may be interrupted.
【0012】支持体材質としては、蒸気膜形成剤が適度
に透過でき、かつ蒸気膜形成剤を適度に包含できる多孔
質体が好適に用いられる。ここでいう多孔質体とは、そ
の内部に蒸気膜形成剤を包含でき、かつ蒸気膜形成剤を
適度に透過できる構造を有するものであり、繊維状構造
の隙間が実質的に孔になっているものも含まれる。蒸気
膜形成剤が適度に透過できるためには、多孔質体の孔の
直径は、好ましくは5mm以下、より好ましくは1mm
以下、特に好ましくは100μm以下である。As the material of the support, a porous body that can appropriately transmit the vapor film forming agent and appropriately include the vapor film forming agent is preferably used. The porous body referred to here has a structure that can contain the vapor film forming agent therein and can appropriately transmit the vapor film forming agent, and the gaps of the fibrous structure become substantially pores. Is included. In order for the vapor film forming agent to be able to permeate properly, the diameter of the pores of the porous body is preferably 5 mm or less, more preferably 1 mm or less.
The thickness is particularly preferably 100 μm or less.
【0013】具体的な支持体材料として、たとえば、セ
ルロース、紙、木、竹等の天然物由来の高分子材料、ポ
リオレフィン等の合成高分子系材料、炭素系材料、が使
用できる。金属フィルタ等に使用されているNi−Cr
−Al合金およびFe−Cr−Al合金、その他の金属
材料も使用できる。また、酸化アルミニウム、酸化ジル
コニウム等の金属酸化物、炭化ケイ素等の金属炭化物、
窒化ケイ素等の金属窒化物、を主成分とするセラミック
ス材料も使用できる。水を蒸気膜形成剤として使用する
場合、親水性処理を施した材料を使用することが好まし
い。なかでも、親水性多孔質カーボンが、水透過性、水
を包含できる量、機械的強度、等の点で支持体材質とし
て優れている。As specific support materials, for example, polymer materials derived from natural products such as cellulose, paper, wood, bamboo and the like, synthetic polymer materials such as polyolefin, and carbon materials can be used. Ni-Cr used for metal filters, etc.
-Al alloy, Fe-Cr-Al alloy, and other metal materials can also be used. Also, metal oxides such as aluminum oxide and zirconium oxide, metal carbides such as silicon carbide,
A ceramic material containing a metal nitride such as silicon nitride as a main component can also be used. When water is used as the vapor film forming agent, it is preferable to use a material that has been subjected to a hydrophilic treatment. Among them, hydrophilic porous carbon is excellent as a support material in terms of water permeability, an amount capable of containing water, mechanical strength, and the like.
【0014】支持体表面は、支持体の孔または繊維状の
凹凸以外は非常に平滑であることが望ましいが、一般的
に工業的に安価に成形仕上げされる面であれば問題なく
使用できる。支持体としては、接触面が固定されない、
等の利点を有する回転可能なロールを使用することが好
ましい。The surface of the support is desirably very smooth except for holes or fibrous irregularities in the support. Generally, any surface can be used without problems as long as it can be formed and finished industrially at low cost. As a support, the contact surface is not fixed,
It is preferable to use a rotatable roll having such advantages.
【0015】本発明においては、リボン状ガラスとその
支持体との間に存在する蒸気の膜は蒸気の連続的供給に
より更新されていく。その結果、リボン状ガラスが接触
する蒸気の膜に不純物等が残留するおそれは少なく、表
面平滑性の良好な板ガラスが得られる。蒸気膜形成剤
は、支持体に液体状態で供給されるため、連続的な供給
が容易であり供給量も少量でよい。In the present invention, the vapor film existing between the ribbon glass and the support is renewed by continuous supply of the vapor. As a result, there is little possibility that impurities or the like remain in the vapor film in contact with the ribbon-shaped glass, and a sheet glass with good surface smoothness can be obtained. Since the vapor film forming agent is supplied to the support in a liquid state, continuous supply is easy and the supply amount may be small.
【0016】次に、本発明の実施形態を図面を用いて説
明する。図1はフロート法における本発明実施の一例で
あり、溶解窯で溶解された溶融ガラスは図の左方から溶
融金属浴3に供給され、溶融金属2の上で平滑化平坦化
されるとともに厚み調整されリボン状ガラス1に成形さ
れる。リボン状ガラス1は溶融金属浴3から引出され、
本発明のリボン状ガラス支持体である親水性多孔質カー
ボンロール5に乗る形で搬送される。リボン状ガラス1
と親水性多孔質カーボンロール5の間には、図示してい
ないが蒸気の膜が存在する。また、発生した蒸気が還元
性雰囲気に保たれている溶融金属浴内上部空間4に入り
込まないように遮蔽板6によって空間が仕切られてい
る。リボン状ガラス1はさらに徐冷窯7に搬送される。
なお本図で示した例において、親水性多孔質カーボンロ
ール5以外のものはフロート法において公知な材料、構
造であればよく、何ら限定されるものではない。Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention in a float method. Molten glass melted in a melting furnace is supplied to a molten metal bath 3 from the left side of the figure, and is smoothed and flattened on the molten metal 2 and has a thickness. It is adjusted and formed into a ribbon-shaped glass 1. The ribbon-shaped glass 1 is withdrawn from the molten metal bath 3,
It is transported on a hydrophilic porous carbon roll 5 which is a ribbon-shaped glass support of the present invention. Ribbon glass 1
Although not shown, there is a vapor film between the and the hydrophilic porous carbon roll 5. Further, the space is partitioned by a shielding plate 6 so that the generated steam does not enter the upper space 4 in the molten metal bath kept in the reducing atmosphere. The ribbon-shaped glass 1 is further conveyed to the annealing furnace 7.
In the example shown in this figure, the material other than the hydrophilic porous carbon roll 5 may be any material and structure known in the float process, and is not limited at all.
【0017】図2は図1に示した例において使用される
親水性多孔質カーボンロール5の構造の一例を示したも
のである。8はロールシャフト、9は給水口、10は排
水口である。ここでは、円筒状の親水性多孔質カーボン
でロール本体が作られ、蒸気膜形成剤としての水が供
給、排出されるようになっている。図示したものは最も
一般的で単純な構造の模式図であるが、液体状態の蒸気
膜形成剤が連続的に供給排出できるものであれば、何ら
限定されるものではない。FIG. 2 shows an example of the structure of the hydrophilic porous carbon roll 5 used in the example shown in FIG. 8 is a roll shaft, 9 is a water supply port, and 10 is a drain port. Here, the roll body is made of cylindrical hydrophilic porous carbon, and water as a vapor film forming agent is supplied and discharged. The illustrated one is a schematic diagram of the most common and simple structure, but is not limited in any way as long as the liquid-state vapor film forming agent can be continuously supplied and discharged.
【0018】図3はロールアウト法における本発明実施
の一例であり、溶解窯で溶解された溶融ガラス11は成
形用ロール12によって板状に成形されてリボン状ガラ
ス1となる。場合によっては型模様がリボン状ガラス1
の表面に施される。リボン状ガラス1は、本発明のリボ
ン状ガラス支持体である親水性多孔質カーボンロール5
に乗る形で搬送される。リボン状ガラス1と親水性多孔
質カーボンロール5の間には、図示していないが蒸気の
膜が存在する。リボン状ガラス1はさらに徐冷窯7に搬
送される。FIG. 3 shows an embodiment of the present invention in a roll-out method. A molten glass 11 melted in a melting furnace is formed into a plate shape by a forming roll 12 to form a ribbon-shaped glass 1. In some cases, the pattern is ribbon-shaped glass 1
Is applied to the surface. The ribbon-shaped glass 1 is made of a hydrophilic porous carbon roll 5 which is the ribbon-shaped glass support of the present invention.
It is transported in the form of riding. Although not shown, a vapor film is present between the ribbon-shaped glass 1 and the hydrophilic porous carbon roll 5. The ribbon-shaped glass 1 is further conveyed to the annealing furnace 7.
【0019】図1および図3において、本発明を成形直
後から徐冷窯に入るまでのリボン状ガラスの搬送に用い
る場合について述べたが、本発明はこれに限定されるも
のではなく、たとえば徐冷窯入口付近でのリボン状ガラ
スの搬送にも用いることができる。以上述べたように本
発明は、現在工業的に汎用されている板ガラスの代表的
製法であるフロート法やロールアウト法において、成形
直後の高温での搬送工程における搬送用ロールとリボン
状ガラスとの接触に起因する問題を解決する技術を提供
するものであり、板ガラスの工業的な製造に広く利用で
きる。In FIGS. 1 and 3, the case where the present invention is used for transporting ribbon-shaped glass from immediately after molding to entering a slow cooling kiln has been described. However, the present invention is not limited to this. It can also be used to transport ribbon-shaped glass near the cold kiln entrance. As described above, the present invention is a method for manufacturing a glass sheet which is currently widely used in industry, in a float method or a roll-out method, in which a transfer roll and a ribbon-shaped glass in a transfer step at a high temperature immediately after molding. The present invention provides a technique for solving a problem caused by contact and can be widely used for industrial production of sheet glass.
【0020】[0020]
【発明の効果】本発明は、板ガラスの製造工程におい
て、リボン状ガラス、特に高温のリボン状ガラスと搬送
用ロールとの接触によって発生している種々の問題を解
決することができ、製造工程の安定およびガラス表面の
欠点減少にもとづく歩留り向上を通して大幅なコストダ
ウンを図ることができる。According to the present invention, it is possible to solve various problems caused by the contact between a ribbon-shaped glass, particularly a high-temperature ribbon-shaped glass and a transporting roll, in a manufacturing process of a sheet glass. Significant cost reduction can be achieved through improvement of the yield based on stability and reduction of defects on the glass surface.
【図1】本発明の実施の形態を示す側断面図FIG. 1 is a side sectional view showing an embodiment of the present invention.
【図2】本発明の親水性多孔質カーボンロールを示す図FIG. 2 is a view showing a hydrophilic porous carbon roll of the present invention.
【図3】本発明の他の実施の形態を示す側断面図FIG. 3 is a side sectional view showing another embodiment of the present invention.
1:リボン状ガラス 2:溶融金属 3:溶融金属浴 4:溶融金属浴内上部空間 5:親水性多孔質カーボンロール 6:遮蔽板 7:徐冷窯 8:ロールシャフト 9:給水口 10:排水口 11:溶融ガラス 12:成形用ロール 1: ribbon-shaped glass 2: molten metal 3: molten metal bath 4: upper space in the molten metal bath 5: hydrophilic porous carbon roll 6: shielding plate 7: annealing furnace 8: roll shaft 9: water supply port 10: drainage Mouth 11: Molten glass 12: Roll for forming
Claims (6)
搬送する方法であって、リボン状ガラスと該リボン状ガ
ラスを搬送時に支持する支持体との間に蒸気の膜が存在
し、該蒸気が該支持体内部に存在する液体(以下蒸気膜
形成剤という。)の蒸発によって生成するリボン状ガラ
スの搬送方法。1. A method of transporting a ribbon-shaped glass at a temperature lower than its softening point, wherein a film of vapor exists between the ribbon-shaped glass and a support that supports the ribbon-shaped glass during transportation. A method of transporting ribbon-shaped glass in which vapor is generated by evaporation of a liquid (hereinafter referred to as a vapor film forming agent) existing inside the support.
が透過できる材料からなる請求項1記載のリボン状ガラ
スの搬送方法。2. The method according to claim 1, wherein the support is made of a material through which the vapor film forming agent can pass.
2記載のリボン状ガラスの搬送方法。3. The method according to claim 1, wherein the support is a roll.
または3記載のリボン状ガラスの搬送方法。4. The method according to claim 1, wherein said vapor film forming agent is water.
Or the method for transporting ribbon-shaped glass according to 3.
ラスを、請求項1、2、3または4記載のリボン状ガラ
スの搬送方法を用いて溶融金属浴から引出し徐冷窯まで
搬送する板ガラス製造方法。5. A method for manufacturing a glass sheet, comprising drawing a ribbon-shaped glass formed by a float method from a molten metal bath using the ribbon-shaped glass transportation method according to claim 1, 2, 3 or 4, and transporting the drawn glass to an annealing furnace. .
状ガラスを、請求項1、2、3または4記載のリボン状
ガラスの搬送方法を用いて徐冷窯まで搬送する板ガラス
製造方法。6. A method for manufacturing a glass sheet, comprising transporting a ribbon-shaped glass formed by a roll-out method to an annealing furnace using the ribbon-shaped glass transportation method according to claim 1, 2, 3 or 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11383098A JPH11302029A (en) | 1998-04-23 | 1998-04-23 | Method for transporting ribbon-like glass and production of sheet glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11383098A JPH11302029A (en) | 1998-04-23 | 1998-04-23 | Method for transporting ribbon-like glass and production of sheet glass |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11302029A true JPH11302029A (en) | 1999-11-02 |
Family
ID=14622119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11383098A Pending JPH11302029A (en) | 1998-04-23 | 1998-04-23 | Method for transporting ribbon-like glass and production of sheet glass |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11302029A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10307588B4 (en) * | 2002-03-06 | 2005-03-24 | Schott Ag | Device for cleaning the surface of lifting-out rollers (lift-out rollers) of a floatation plant for producing a floated glass ribbon |
DE102006027944B4 (en) * | 2006-06-17 | 2009-05-14 | Schott Ag | Scrapers for cleaning transport rollers in the lifting area of a float glass plant |
JP2009107871A (en) * | 2007-10-29 | 2009-05-21 | Asahi Glass Co Ltd | Glass plate manufacturing method |
CN104724911A (en) * | 2015-04-09 | 2015-06-24 | 蚌埠中建材信息显示材料有限公司 | Tin bath outlet end sealing device |
CN105384326A (en) * | 2014-09-01 | 2016-03-09 | 旭硝子株式会社 | Atmosphere separation device, float glass manufacturing device and float glass manufacturing method |
WO2019192894A1 (en) * | 2018-04-05 | 2019-10-10 | Eisenmann Se | Support structure, furnace installation, treatment plant, and method for treating workpieces |
-
1998
- 1998-04-23 JP JP11383098A patent/JPH11302029A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10307588B4 (en) * | 2002-03-06 | 2005-03-24 | Schott Ag | Device for cleaning the surface of lifting-out rollers (lift-out rollers) of a floatation plant for producing a floated glass ribbon |
DE102006027944B4 (en) * | 2006-06-17 | 2009-05-14 | Schott Ag | Scrapers for cleaning transport rollers in the lifting area of a float glass plant |
JP2009107871A (en) * | 2007-10-29 | 2009-05-21 | Asahi Glass Co Ltd | Glass plate manufacturing method |
CN105384326A (en) * | 2014-09-01 | 2016-03-09 | 旭硝子株式会社 | Atmosphere separation device, float glass manufacturing device and float glass manufacturing method |
CN104724911A (en) * | 2015-04-09 | 2015-06-24 | 蚌埠中建材信息显示材料有限公司 | Tin bath outlet end sealing device |
WO2019192894A1 (en) * | 2018-04-05 | 2019-10-10 | Eisenmann Se | Support structure, furnace installation, treatment plant, and method for treating workpieces |
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