JPS621328B2 - - Google Patents
Info
- Publication number
- JPS621328B2 JPS621328B2 JP56143317A JP14331781A JPS621328B2 JP S621328 B2 JPS621328 B2 JP S621328B2 JP 56143317 A JP56143317 A JP 56143317A JP 14331781 A JP14331781 A JP 14331781A JP S621328 B2 JPS621328 B2 JP S621328B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- molten
- weir member
- metal bath
- molten glass
- 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.)
- Expired
Links
- 239000006060 molten glass Substances 0.000 claims description 37
- 239000011521 glass Substances 0.000 claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 3
- 239000005357 flat glass Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000006124 Pilkington process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
- C03B18/06—Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Description
【発明の詳細な説明】
本発明は溶融金属浴上に溶融ガラスを供給し、
溶融ガラスを溶融金属浴上において薄板状に成形
し、その後これを溶融金属浴から引き出すように
したいわゆるフロート法ガラス製板に関し、特に
１mm以下の厚さの薄板ガラスを製造するのに好適
なフロート法による薄板ガラスの製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides molten glass on a molten metal bath;
Regarding the so-called float glass manufacturing plate in which molten glass is formed into a thin plate shape on a molten metal bath and then pulled out from the molten metal bath, this float is particularly suitable for manufacturing thin plate glass with a thickness of 1 mm or less. The present invention relates to a method for manufacturing thin glass by a method.
フロート法ガラス製板によつていわゆる平衡厚
以下の板厚のガラスを製造する場合は、溶融金属
浴以後において牽引力を働かせて、溶融金属浴上
のガラスリボンを引き伸ばすことが行なわれてき
た。しかし、このような従来方法においてはガラ
スリボンの幅方向に収縮力が作用するため、収縮
力に対抗するようにガラスリボンの側端部にトツ
プロールを係合させる手段が採用されている。し
たがつて、ガラスリボンの側端部がトツプロール
と十分に係合しうるだけの厚さを有することが必
要であり、２mm程度までの板ガラスの製造は可能
であつても、それ以下の板厚を有する板ガラスを
商業的に生産することは困難であつた。 When producing glass having a thickness less than the so-called equilibrium thickness using a float process glass plate, a traction force has been applied after the molten metal bath to stretch the glass ribbon on the molten metal bath. However, in such a conventional method, since a shrinkage force acts in the width direction of the glass ribbon, a means for engaging a top roll with a side end of the glass ribbon is adopted to counteract the shrinkage force. Therefore, it is necessary that the side edges of the glass ribbon have a thickness sufficient to engage with the top roll, and even though it is possible to manufacture plate glass up to about 2 mm, it is not possible to manufacture plate glass with a thickness of less than 2 mm. It has been difficult to commercially produce sheet glass having this.
フロート法ガラス製板においてより薄い板ガラ
スを製造するための改良として、特公昭54−
31012号公報には、溶融金属浴上に溶融ガラスの
流れを横切る方向に堰部材を設け、この堰部材に
より溶融金属浴上に溶融ガラスの溜りを形成し、
堰部材の区域で溶融ガラスを通電加熱しつつ溶融
ガラスを堰部材と溶融金属浴面との間を通過さ
せ、薄い板ガラスを製造する方法が記載されてい
る。しかしながら、この方法により例えば１mm以
下の板厚の板ガラスを製造した場合、板ガラスの
引き出し方向に複数の筋あるいは泡が発生し、高
品質の板ガラスが得がたく、その生産性も著しく
低いものであつた。 As an improvement for producing thinner plate glass using the float method,
Publication No. 31012 discloses that a weir member is provided on a molten metal bath in a direction transverse to the flow of molten glass, and a pool of molten glass is formed on the molten metal bath by this weir member,
A method is described for producing thin sheet glass by passing the molten glass between a weir member and a molten metal bath surface while electrically heating the molten glass in the area of the weir member. However, when producing plate glass with a thickness of, for example, 1 mm or less using this method, multiple streaks or bubbles occur in the drawing direction of the plate glass, making it difficult to obtain high-quality plate glass, and the productivity is also extremely low. Ta.
本発明者らはこれらの方法の欠点を解消する方
法について種々検討する過程において、特公昭54
−31012号公報の発明で泡の発生は堰部材の区域
における通電加熱を行なわないことによりかなり
解消されることを見出した。さらに、なお少量の
泡の発生および筋の発生が堰部材の形状および材
質に大きく影響され、この材質としてカーボング
ラフアイトを用いることにより泡および筋の発生
を大きく抑制しうることを見出した。 In the process of investigating various ways to eliminate the drawbacks of these methods, the present inventors
In the invention disclosed in Japanese Patent No. 31012, it has been found that the generation of bubbles can be largely eliminated by not carrying out electrical heating in the area of the weir member. Furthermore, it has been found that the generation of small amounts of bubbles and streaks is greatly influenced by the shape and material of the weir member, and that by using carbon graphite as the material, the generation of bubbles and streaks can be greatly suppressed.
すなわち、本発明の薄板ガラスの製造法は、溶
融ガラスを溶融金属浴上に供給し、溶融金属浴面
上に溶融金属浴を横切つて設けた堰部材により溶
融ガラスの溜りを形成し、この溶融ガラスを堰部
材と溶融金属浴面との間を通過させて伸延するよ
うにした薄板ガラスの製造法において、溶融ガラ
ス上面と接触する堰部材の部分を下流側に傾斜さ
せて溶融ガラスの堰部材に対する抵抗を下流に向
うに従つて増大させ、かつ溶融ガラスと最終接触
する堰部材の部分を垂直に立上らせて溶融ガラス
との親和力を伸延力に対して直角に作用させると
ともに、該堰部材として気孔率が９〜23％であ
り、かつ炭素の粒径が0.1mm以下である等方性の
カーボングラフアイトを用いることを特徴とする
ものである。 That is, in the method for producing thin glass of the present invention, molten glass is supplied onto a molten metal bath, a pool of molten glass is formed by a weir member provided across the molten metal bath on the surface of the molten metal bath, and this In a method for manufacturing thin glass in which molten glass is stretched by passing between a weir member and a molten metal bath surface, the part of the weir member that contacts the upper surface of the molten glass is inclined downstream to prevent the molten glass from flowing into the weir. The resistance to the member is increased downstream, and the part of the weir member that makes final contact with the molten glass is raised vertically so that the affinity force with the molten glass acts at right angles to the distraction force, and the The weir member is characterized by using isotropic carbon graphite having a porosity of 9 to 23% and a carbon particle size of 0.1 mm or less.
堰部材として使用されるカーボングラフアイト
としては気孔率が23％以下であることが好まし
い。23％を超えると、ガラスとカーボングラフア
イトとの界面での反応性が大となり、また、グラ
スに濡れやすくなり、製造される薄板ガラス面に
微細な凹凸が発生するという欠点を有する。ま
た、さらに好ましくは気孔率は９％以上である。
９％未満であると、ガラスとの界面で発生した気
体がカーボングラフアイトの気孔を通して速やか
に拡散されず、製造される薄板ガラスに泡が発生
しやすくなる。なお、気孔率を嵩比重で表わすと
気孔率９％および23％はそれぞれ嵩比重2.1およ
び1.77である。 The carbon graphite used as a weir member preferably has a porosity of 23% or less. If it exceeds 23%, the reactivity at the interface between the glass and carbon graphite increases, and the glass tends to get wet, resulting in the formation of fine irregularities on the surface of the manufactured thin glass. Furthermore, the porosity is more preferably 9% or more.
If it is less than 9%, gas generated at the interface with the glass will not be quickly diffused through the pores of carbon graphite, and bubbles will easily occur in the manufactured thin glass. Note that when the porosity is expressed in terms of bulk specific gravity, the bulk specific gravity of porosity of 9% and 23% is 2.1 and 1.77, respectively.
カーボングラフアイトの炭素の粒径は0.1mm以
下であることが好ましく、0.1mmを超えると堰部
材の表面が粗くなり、製造される薄板ガラスに微
細な凹凸が発生しやすくなる。 The particle size of carbon in carbon graphite is preferably 0.1 mm or less; if it exceeds 0.1 mm, the surface of the weir member becomes rough, and fine irregularities are likely to occur in the manufactured thin glass sheet.
また、カーボングラフアイトの異方性が大とな
ると、精密加工しても使用中に溶融ガラスによる
不均一な摩耗を生じ、高品質の薄板ガラスが得ら
れないなどの欠点を生じるので、あらゆる物性値
と耐摩耗性が実用的な面で異方性を示さない範囲
の等方性のカーボングラフアイトを用いるのが好
ましい。 In addition, if the anisotropy of carbon graphite becomes large, even if precision processed, molten glass will cause uneven wear during use, resulting in disadvantages such as the inability to obtain high-quality thin glass. It is preferable to use isotropic carbon graphite whose value and wear resistance are within a practical range that does not show anisotropy.
第１図は本発明を実施する場合に使用する薄板
ガラスの製造装置を示す縦断面図である。図中、
１１は底部耐火物、１２は溶融ガラス、１３は溶
融ガラスプール、１４は耐火物製ツイール、１５
はリツプタイル、１６はウエツトバツクタイル、
１７は溶融金属浴、１８は堰部材、１９はヒータ
ー、２０は断熱部材、２１はクーラーを示す。 FIG. 1 is a longitudinal sectional view showing a thin glass manufacturing apparatus used in carrying out the present invention. In the figure,
11 is a bottom refractory, 12 is a molten glass, 13 is a molten glass pool, 14 is a refractory twill, 15
is a lip tile, 16 is a wet back tile,
17 is a molten metal bath, 18 is a weir member, 19 is a heater, 20 is a heat insulating member, and 21 is a cooler.
ガラス溶融タンク窯（図示されていない）で溶
解された溶融ガラス１２はツイール１４によりそ
の量を制御され、リツプタイル１５上を流れ、溶
融金属浴１７上に供給され、側壁２２、ウエツト
バツクタイル１６および堰部材１８により溶融ガ
ラスプール１３を形成する。溶融ガラスプール１
３に供給された溶融ガラス１２は、堰部材１８と
溶融金属浴１７面との間を通過し、この間で例え
ば溶融金属浴１７の外部に設けられた搬送ロール
（図示されていない）の牽引力によつて伸延力を
受け、薄く引き伸ばされて帯状ガラス２３が形成
される。本発明においては堰部材１８の材質とし
て特定のカーボングラフアイトが用いられている
ので、泡、筋の発生の少ない帯状ガラスが得られ
る。 The amount of molten glass 12 melted in a glass melting tank kiln (not shown) is controlled by a twill 14, flows over a lip tile 15, is supplied onto a molten metal bath 17, and is deposited on a side wall 22 and a wet bag tile 16. A molten glass pool 13 is formed by the weir member 18. Molten glass pool 1
The molten glass 12 supplied to the molten metal bath 17 passes between the weir member 18 and the surface of the molten metal bath 17, and is subjected to the traction force of, for example, a conveyor roll (not shown) provided outside the molten metal bath 17. As a result, the ribbon glass 23 is formed by being stretched thinly by a stretching force. In the present invention, since a specific carbon graphite is used as the material for the weir member 18, a glass ribbon with fewer bubbles and streaks can be obtained.
第２図は本発明で使用する堰部材の構成例につ
いて示す拡大図であり、堰部材１８は、溶融ガラ
スプール１３側に下流に傾斜する傾斜部２４を有
し、また、溶融ガラス１２と最終接触部分で垂直
部２５を有している。この堰部材１８は溶融ガラ
スプール１３の上面２６が傾斜部２４に位置する
ように配設され、傾斜部２４は堰部材１８を通過
する溶融ガラス１２が下流に向かうほど大きな抵
抗を受けるように傾斜している。このような傾斜
部２４を有する堰部材を使用すれば、溶融ガラス
プール１３側の堰部材１８付近での溶融ガラス１
２の部分的な停滞によるゴブの形成が抑制され
る。また、堰部材１８による抵抗を受けた溶融ガ
ラス１２の流れは下流に向うに従つて速度を増
す。このとき、溶融ガラス１２の粘性抵抗が伸延
力に対する反作用として働き、溶融ガラス１２と
堰部材１８の接触面に反作用力が集中するのを解
消する。さらに、堰部材１８を離れる時点で帯状
ガラス２３は薄くなつており、帯状ガラス２３を
堰部材直後で極端に伸延する必要はない。 FIG. 2 is an enlarged view showing an example of the structure of the weir member used in the present invention. It has a vertical portion 25 at the contact portion. This weir member 18 is disposed such that the upper surface 26 of the molten glass pool 13 is located at the inclined part 24, and the inclined part 24 is inclined so that the molten glass 12 passing through the weir member 18 receives greater resistance as it goes downstream. are doing. If a weir member having such an inclined portion 24 is used, the molten glass 1 near the weir member 18 on the side of the molten glass pool 13 can be used.
The formation of gobs due to partial stagnation of 2 is suppressed. Further, the flow of the molten glass 12 that has been resisted by the weir member 18 increases in speed as it goes downstream. At this time, the viscous resistance of the molten glass 12 acts as a reaction to the stretching force, eliminating concentration of reaction force on the contact surface between the molten glass 12 and the weir member 18. Furthermore, the glass ribbon 23 is thinner when it leaves the weir member 18, and there is no need to stretch the glass ribbon 23 to an extreme extent immediately after the weir member.
また、堰部材１８は溶融ガラス１２と最終接触
する部分に垂直部２５を有しているため、溶融ガ
ラス１２の堰部材１８に対する親和力（図中の矢
印２７）は伸延力（図中の矢印２８）に対して直
角に作用することになり、親和力の不均一は伸延
力に対して何ら影響しないばかりか、停滞素地の
発生も無く、筋の発生が防止される。 In addition, since the weir member 18 has a vertical portion 25 at the part that makes final contact with the molten glass 12, the affinity force (arrow 27 in the figure) of the molten glass 12 to the weir member 18 is the distraction force (arrow 28 in the figure). ), the non-uniform affinity has no effect on the distraction force, and there is no generation of stagnation, and the generation of streaks is prevented.
本発明の薄板ガラスの製造法によれば、堰部材
の材質として気孔率が23％以下の等方性カーボン
グラフアイトを用いることにより、泡および筋の
発生が抑制され、また、堰部材を連続的に長期間
使用でき、高品質の薄板ガラスを製造することが
できる。 According to the thin glass manufacturing method of the present invention, by using isotropic carbon graphite with a porosity of 23% or less as the material of the weir member, the generation of bubbles and streaks can be suppressed, and the weir member can be made continuous. It is possible to produce high-quality thin glass that can be used for a long period of time.
第１図は本発明で使用する薄板ガラスの製造装
置の一例を示す縦断面図である。第２図は堰部材
の一例を示す断面図である。
１２……溶融ガラス、１３……溶融ガラスプー
ル、１７……溶融金属浴、１８……堰部材、２３
……帯状ガラス、２４……傾斜部、２５……垂直
部。
FIG. 1 is a longitudinal sectional view showing an example of a thin glass manufacturing apparatus used in the present invention. FIG. 2 is a sectional view showing an example of the weir member. 12... Molten glass, 13... Molten glass pool, 17... Molten metal bath, 18... Weir member, 23
... Band-shaped glass, 24 ... Inclined part, 25 ... Vertical part.
Claims (1)
属浴面上に溶融金属浴を横切つて設けた堰部材に
より溶融ガラスの溜りを形成し、この溶融ガラス
を堰部材と溶融金属浴面との間を通過させて伸延
するようにした薄板ガラスの製造法において、溶
融ガラス上面と接触する堰部材の部分を下流側に
傾斜させて溶融ガラスの堰部材に対する抵抗を下
流に向うに従つて増大させ、かつ溶融ガラスと最
終接触する堰部材の部分を垂直に立上らせて溶融
ガラスとの親和力を伸延力に対して直角に作用さ
せるとともに、該堰部材として気孔率が９〜23％
であり、かつ炭素の粒径が0.1mm以下である等方
性のカーボングラフアイトを用いることを特徴と
する薄板ガラスの製造法。1. Molten glass is supplied onto the molten metal bath, a pool of molten glass is formed on the molten metal bath surface by a weir member provided across the molten metal bath, and this molten glass is transferred between the molten metal bath surface and the molten metal bath surface. In a method for manufacturing thin glass in which the molten glass is stretched by passing between At the same time, the part of the weir member that makes final contact with the molten glass is raised vertically so that the affinity force with the molten glass acts perpendicularly to the distraction force, and the weir member has a porosity of 9 to 23%.
1. A method for producing thin glass, characterized by using isotropic carbon graphite having a carbon particle size of 0.1 mm or less.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14331781A JPS5845128A (en) | 1981-09-11 | 1981-09-11 | Manufacture of sheet glass |
| GB08221876A GB2102790B (en) | 1981-07-31 | 1982-07-29 | Method of producing thin sheet glass of high quality by float process |
| FR8213411A FR2510542B1 (en) | 1981-07-31 | 1982-07-30 | PROCESS FOR PRODUCING THIN GLASS GLASS BY HIGH QUALITY FLOTATION PROCESS |
| US06/403,321 US4439222A (en) | 1981-07-31 | 1982-07-30 | Method of producing thin sheet glass of high quality by float process |
| DE3228536A DE3228536C2 (en) | 1981-07-31 | 1982-07-30 | Device for the production of relatively thin glass ribbons using the float process |
| CA000408445A CA1189704A (en) | 1981-07-31 | 1982-07-30 | Method of producing thin sheet glass of high quality by float process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14331781A JPS5845128A (en) | 1981-09-11 | 1981-09-11 | Manufacture of sheet glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5845128A JPS5845128A (en) | 1983-03-16 |
| JPS621328B2 true JPS621328B2 (en) | 1987-01-13 |
Family
ID=15335960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14331781A Granted JPS5845128A (en) | 1981-07-31 | 1981-09-11 | Manufacture of sheet glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5845128A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8707739B2 (en) * | 2012-06-11 | 2014-04-29 | Johns Manville | Apparatus, systems and methods for conditioning molten glass |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838317A (en) * | 1971-09-16 | 1973-06-06 |
-
1981
- 1981-09-11 JP JP14331781A patent/JPS5845128A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838317A (en) * | 1971-09-16 | 1973-06-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5845128A (en) | 1983-03-16 |
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