JPH06239631A - Apparatus for producing float glass - Google Patents
Apparatus for producing float glassInfo
- Publication number
- JPH06239631A JPH06239631A JP4753993A JP4753993A JPH06239631A JP H06239631 A JPH06239631 A JP H06239631A JP 4753993 A JP4753993 A JP 4753993A JP 4753993 A JP4753993 A JP 4753993A JP H06239631 A JPH06239631 A JP H06239631A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- hanger
- molten metal
- metal bath
- bath
- 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.)
- Granted
Links
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
- C03B18/16—Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
(57)【要約】
【構成】溶融金属浴槽２の天井部をハンガー５に係合し
た耐火物３で構成し、溶融ガラスＧを溶融金属浴１の浴
面に連続的に供給して帯状ガラスを成形するフロートガ
ラスの製造装置であって、ハンガー５を窒化珪素又は炭
化珪素で構成した。
【効果】高歪点ガラス、低膨張フロートガラスの成形が
長期連続して可能となり、従来不可能であったガラスの
工業生産が可能となる。
(57) [Summary] [Structure] The ceiling portion of the molten metal bath 2 is composed of the refractory 3 engaged with the hanger 5, and the molten glass G is continuously supplied to the bath surface of the molten metal bath 1 to form a glass strip. The hanger 5 is made of silicon nitride or silicon carbide. [Effect] High strain point glass and low expansion float glass can be continuously molded for a long period of time, and industrial production of glass, which was impossible in the past, becomes possible.
Description
【０００１】[0001]
【産業上の利用分野】本発明はフロート式のガラス製造
装置で、特に高歪点ガラス及び低膨張ガラスを成形する
フロート製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float type glass manufacturing apparatus, and more particularly to a float manufacturing apparatus for forming high strain point glass and low expansion glass.
【０００２】[0002]
【従来の技術】フロートガラスの製造装置として、図１
に示すような装置が知られている。即ち、溶融金属浴１
を収容する溶融金属浴槽２を設け、溶融金属浴槽２の天
井部をハンガー５に係合した耐火物３で構成してある。
このハンガーはその上端が鋼材４に係合されている。ハ
ンガーは、通常、オーステナイト系のクロム−ニッケル
鋼により構成されている。６はヒータでありガラスリボ
ンＧを所定温度になるように調整する。７は耐火物で構
成された横壁である。2. Description of the Related Art FIG. 1 shows an apparatus for producing float glass.
A device as shown in is known. That is, molten metal bath 1
A molten metal bath 2 for accommodating the above is provided, and a ceiling portion of the molten metal bath 2 is constituted by a refractory 3 engaged with a hanger 5.
The upper end of this hanger is engaged with the steel material 4. The hanger is usually made of austenitic chromium-nickel steel. A heater 6 adjusts the glass ribbon G to a predetermined temperature. Reference numeral 7 is a lateral wall made of refractory material.
【０００３】フロートバスでの帯状ガラスの成形温度は
ソーダーライム組成では通常１１００〜６００℃で、粘
度で表わすと１０3.5 〜１０11.5ポイズの範囲である。
この時のハンガーの温度は最高で９００℃である。近年
エレクトロニクス用を中心とした高歪点ガラス、低膨張
ガラスの用途が拡大し、ソーダーライムガラス以外の例
えば硼珪酸ガラス、アルミノシリケートガラスをフロー
ト法で成形することが試みられている。The forming temperature of the glass ribbon in a float bath is usually 1100 to 600 ° C. in the soda-lime composition, and the viscosity is in the range of 10 3.5 to 10 11.5 poise.
The temperature of the hanger at this time is 900 ° C. at the maximum. In recent years, applications of high strain point glass and low expansion glass mainly for electronics have been expanded, and it has been attempted to mold borosilicate glass and aluminosilicate glass other than soda lime glass by the float method.
【０００４】しかし、これらのガラスは一般に粘性が高
く、成形域で同粘性に合わせるためにはソーダーライム
ガラスに比して１００〜２００℃温度を高くする必要が
ある。その結果ハンガーの温度も１０００〜１１００℃
に迄上昇する。ハンガーを構成しているオーステナイト
系のクロム−ニッケル鋼は、１０００℃以上で錫浴の酸
化防止のためにバスに供給されているＮ2 ガスと反応し
Ｃｒ2 Ｎを生成する。このＣｒ2 Ｎの溶解度が低いた
め、反応の進行と共にＣｒ2 Ｎが析出し全体の脆化を引
き起こす。その結果、通常の耐熱クリープよりはるかに
短時間で破断してしまうため、前記ガラスを製造するの
に、長期運転が不可能であるという課題があった。However, these glasses generally have high viscosities, and it is necessary to raise the temperature at 100 to 200 ° C. as compared with soda lime glass in order to adjust to the same viscosity in the molding region. As a result, the temperature of the hanger is 1000-1100 ° C.
Rises to. The austenitic chromium-nickel steel forming the hanger reacts with N 2 gas supplied to the bath to prevent oxidation of the tin bath at 1000 ° C. or higher and produces Cr 2 N. Since the solubility of Cr 2 N is low, Cr 2 N precipitates as the reaction progresses, causing embrittlement of the whole. As a result, the glass breaks in a much shorter time than the normal heat-resistant creep, so that there is a problem that long-term operation is not possible in producing the glass.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、従来の技術
が有していた上記課題を解消し、高歪点ガラス、低膨張
ガラスであっても長期運転が可能なフロートガラスの製
造装置の提供を目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above problems of the prior art and provides a float glass manufacturing apparatus capable of long-term operation even with high strain point glass and low expansion glass. For the purpose of provision.
【０００６】[0006]
【課題を解決するための手段】本発明は、溶融金属浴槽
の天井部をハンガーに係合した耐火物で構成し、溶融ガ
ラスを溶融金属浴の浴面に連続的に供給して帯状ガラス
を成形する製造装置であって、ハンガーを窒化珪素又は
炭化珪素で構成したことを特徴とするフロートガラスの
製造装置である。SUMMARY OF THE INVENTION According to the present invention, the ceiling of a molten metal bath is made of a refractory which is engaged with a hanger, and molten glass is continuously supplied to the bath surface of the molten metal bath to form a glass strip. An apparatus for manufacturing a float glass, wherein the hanger is made of silicon nitride or silicon carbide.
【０００７】[0007]
【作用】窒化珪素及び炭化珪素が特に有効であるのは、
その形が共有結合形であり、一般の無機化合物のイオン
結合形を異にするためであると思われる。共有結合はそ
の結合力の強さから、高温で極めて安定であり、１２０
０℃の温度条件下でも窒化反応が起こらず窒化脆化のお
それが無いと同時に、高温引張強度、高温クリープ特性
等ハンガーに具備すべき特性を有する。その結果、高歪
点ガラス、低膨張ガラスを成形するフロートガラスの製
造装置に、窒化珪素及び炭化珪素製のハンガーを適用す
ることにより、これまで得られなかった長期連続運転が
可能となる。[Function] Silicon nitride and silicon carbide are particularly effective because
The shape is a covalent bond type, and it is thought that this is because the ionic bond form of a general inorganic compound is different. The covalent bond is extremely stable at high temperature because of its strong bonding force.
It does not cause a nitriding reaction even under a temperature condition of 0 ° C. and there is no possibility of nitriding embrittlement, and at the same time, it has characteristics such as high temperature tensile strength and high temperature creep characteristics that the hanger should have. As a result, by applying a hanger made of silicon nitride and silicon carbide to a float glass manufacturing apparatus that molds high strain point glass and low expansion glass, long-term continuous operation, which has hitherto been unachievable, becomes possible.
【０００８】[0008]
【実施例】図１の装置を使用し、ハンガー５を炭化珪素
で構成し、以下の組成のガラスについて、フロートガラ
スの成形を行なった。ハンガーの形状及び寸法は、従来
のものと同じであった。ハンガー温度が１１００℃にな
っており、５年間経過したが天井部の変形はぜんぜん見
られなかった。EXAMPLE Using the apparatus shown in FIG. 1, the hanger 5 was made of silicon carbide, and a glass having the following composition was molded into a float glass. The shape and dimensions of the hanger were the same as conventional ones. The hanger temperature was 1100 ° C, and after 5 years, no deformation of the ceiling was observed.
【０００９】 ＳｉＯ2 ５６重量％ Ａｌ2 Ｏ3 １１重量％ Ｂ2 Ｏ3 ６重量％ ＭｇＯ ２重量％ ＣａＯ ３重量％ ＳｒＯ ７重量％ ＢａＯ １５重量％ 膨張係数 ４８×１０-7／℃ 歪点 ６３５℃SiO 2 56% by weight Al 2 O 3 11% by weight B 2 O 3 6% by weight MgO 2% by weight CaO 3% by weight SrO 7% by weight BaO 15% by weight Expansion coefficient 48 × 10 −7 / ° C. Strain point 635 ℃
【００１０】比較のために、ハンガー５として従来のク
ロム−ニッケル鋼を用いた装置により、同様組成のフロ
ートガラスを成形した結果、３ケ月後に天井部の垂下が
見られた。溶融金属浴槽を冷却し調査したところ、相当
数のハンガーの破断が認められた。ハンガーの破断面調
査でＮ2 が通常部の８倍以上の濃度になりＣｒ2 Ｎの結
晶が観察された。For comparison, as a result of molding a float glass having the same composition with an apparatus using a conventional chromium-nickel steel as the hanger 5, a drooping of the ceiling was observed after 3 months. When the molten metal bath was cooled and investigated, a considerable number of hangers were broken. When the fracture surface of the hanger was examined, N 2 was 8 times or more the concentration of the normal portion, and Cr 2 N crystals were observed.
【００１１】[0011]
【発明の効果】本発明によれば、溶融金属浴槽の温度を
高温に保つことができ、高歪点ガラス、低膨張フロート
ガラスの成形が長期連続して可能となり、従来不可能で
あったガラスの工業生産が可能となった。According to the present invention, the temperature of the molten metal bath can be maintained at a high temperature, and high strain point glass and low expansion float glass can be continuously molded for a long period of time, which has been impossible in the past. The industrial production of
【図１】フロートガラスの製造装置の横断面図FIG. 1 is a cross-sectional view of a float glass manufacturing apparatus.
１：金属浴 ２：溶融金属浴槽 ５：ハンガー ６：ヒータ Ｇ：溶融ガラス 1: Metal bath 2: Molten metal bath 5: Hanger 6: Heater G: Molten glass
Claims (1)
た耐火物で構成し、溶融ガラスを溶融金属浴の浴面に連
続的に供給して帯状ガラスを成形する製造装置であっ
て、ハンガーを窒化珪素又は炭化珪素で構成したことを
特徴とするフロートガラスの製造装置。1. A manufacturing apparatus for forming a band-shaped glass by constituting a ceiling of a molten metal bath with a refractory engaged with a hanger and continuously supplying molten glass to a bath surface of a molten metal bath. An apparatus for producing float glass, characterized in that the hanger is made of silicon nitride or silicon carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04753993A JP3217177B2 (en) | 1993-02-12 | 1993-02-12 | Float glass manufacturing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04753993A JP3217177B2 (en) | 1993-02-12 | 1993-02-12 | Float glass manufacturing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06239631A true JPH06239631A (en) | 1994-08-30 |
| JP3217177B2 JP3217177B2 (en) | 2001-10-09 |
Family
ID=12777950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04753993A Expired - Lifetime JP3217177B2 (en) | 1993-02-12 | 1993-02-12 | Float glass manufacturing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3217177B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005063635A1 (en) * | 2003-12-25 | 2005-07-14 | Asahi Glass Company, Limited | Float bath and float manufacturing process |
| JP2006016291A (en) * | 2003-12-25 | 2006-01-19 | Asahi Glass Co Ltd | Float bath and float forming method |
| WO2010150831A1 (en) | 2009-06-24 | 2010-12-29 | 旭硝子株式会社 | Hanger assembly and device for producing float plate glass |
| WO2011010622A1 (en) | 2009-07-21 | 2011-01-27 | 旭硝子株式会社 | Hanger assembly and apparatus for producing float plate glass |
| KR20160002774A (en) | 2013-04-18 | 2016-01-08 | 아사히 가라스 가부시키가이샤 | Float bath roof member, float plate glass production device using same, and method for producing float plate glass |
-
1993
- 1993-02-12 JP JP04753993A patent/JP3217177B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005063635A1 (en) * | 2003-12-25 | 2005-07-14 | Asahi Glass Company, Limited | Float bath and float manufacturing process |
| JP2006016291A (en) * | 2003-12-25 | 2006-01-19 | Asahi Glass Co Ltd | Float bath and float forming method |
| EP1702894A4 (en) * | 2003-12-25 | 2009-08-26 | Asahi Glass Co Ltd | FLOATING BATH AND FLOTATION MANUFACTURING METHOD |
| WO2010150831A1 (en) | 2009-06-24 | 2010-12-29 | 旭硝子株式会社 | Hanger assembly and device for producing float plate glass |
| CN102803166A (en) * | 2009-06-24 | 2012-11-28 | 旭硝子株式会社 | Hanger Assembly And Device For Producing Float Plate Glass |
| JP5510454B2 (en) * | 2009-06-24 | 2014-06-04 | 旭硝子株式会社 | Hanger assembly and float plate glass manufacturing equipment |
| WO2011010622A1 (en) | 2009-07-21 | 2011-01-27 | 旭硝子株式会社 | Hanger assembly and apparatus for producing float plate glass |
| KR101419990B1 (en) * | 2009-07-21 | 2014-07-15 | 아사히 가라스 가부시키가이샤 | Hanger assembly and apparatus for producing float plate glass |
| TWI465404B (en) * | 2009-07-21 | 2014-12-21 | Asahi Glass Co Ltd | Hanger assembly and float plate glass making device |
| KR20160002774A (en) | 2013-04-18 | 2016-01-08 | 아사히 가라스 가부시키가이샤 | Float bath roof member, float plate glass production device using same, and method for producing float plate glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3217177B2 (en) | 2001-10-09 |
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