JPH05139766A - Molding for producing glass plate - Google Patents
Molding for producing glass plateInfo
- Publication number
- JPH05139766A JPH05139766A JP30069691A JP30069691A JPH05139766A JP H05139766 A JPH05139766 A JP H05139766A JP 30069691 A JP30069691 A JP 30069691A JP 30069691 A JP30069691 A JP 30069691A JP H05139766 A JPH05139766 A JP H05139766A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- central portion
- glass plate
- molten glass
- 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.)
- Granted
Links
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス板製造用成形体
に係り、特に垂直方向下方にガラス板を引き抜くことに
よってガラス板を製造する際に用いる成形体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product for manufacturing a glass plate, and more particularly to a molded product used for manufacturing a glass plate by pulling the glass plate downward in the vertical direction.
【０００２】[0002]
【従来の技術】ガラス板を製造する方法として、ガラス
板を垂直方向に引き抜くダウンドロー式の製造方法が知
られている（例えば特開昭６０−１１２３５号公報参
照）。このダウンドロー式では、溶融槽の底部に設けら
れたスリットを通って流下する溶融ガラスを、スリット
の下方に位置する断面がくさび状の成形体の頂部に供給
し、成形体の表裏面に沿って流下させ、成形体の下端部
において合流させ、下方に向って引き抜くことによって
ガラス板の製造を行なう。2. Description of the Related Art As a method for manufacturing a glass plate, a down-draw type manufacturing method is known in which a glass plate is pulled out in a vertical direction (see, for example, JP-A-60-11235). In this down-draw method, the molten glass flowing down through a slit provided at the bottom of the melting tank is supplied to the top of a wedge-shaped molded body located below the slit, and along the front and back surfaces of the molded body. The glass sheet is manufactured by allowing the glass sheet to flow down, merging at the lower end of the molded body, and pulling out downward.
【０００３】前記成形体は、アルミナチューブの内部に
モリブデン製中空円筒発熱体を納め、その下部にくさび
状の耐火レンガ部材を取付け、これらの外周を白金薄板
で被覆した形状をしている。この成形体は、耐火レンガ
製の炉壁によって取り囲まれた炉室内の上側に配置さ
れ、前記炉室内の下側は成形されたガラス板を冷却する
冷却雰囲気となっている。The molded body has a shape in which a molybdenum hollow cylindrical heating element is housed inside an alumina tube, a wedge-shaped refractory brick member is attached to the lower part thereof, and the outer circumference of these is covered with a platinum thin plate. This molded body is arranged on the upper side of the furnace chamber surrounded by the furnace wall made of refractory bricks, and the lower side of the furnace chamber is a cooling atmosphere for cooling the molded glass sheet.
【０００４】[0004]
【発明が解決しようとする課題】上記のガラス板の製造
装置に用いられる成形体の耐火レンガ等の外周を白金で
被覆してあるのは、成形体の部分的温度差、熱疲労によ
るひび割れや欠損、あるいは成形体表面上を流れる溶融
ガラスによる耐火レンガ等の侵蝕によって、成形される
ガラス板の品質が低下することを防止するためである。The outer periphery of the refractory brick or the like of the molded body used in the above-mentioned glass plate manufacturing apparatus is coated with platinum because of the partial temperature difference of the molded body, cracking due to thermal fatigue, and the like. This is to prevent the quality of the molded glass plate from being deteriorated due to chipping or erosion of refractory bricks or the like by the molten glass flowing on the surface of the molded body.
【０００５】しかしながら、このように耐火レンガ等を
白金で被覆してなる成形体を用いてガラス板を成形する
場合、成形体の頂部から高温の溶融状態のガラスが成形
体の表裏面に沿って流下する際、成形体表面の白金被覆
と内部の耐火物との熱膨張の差により、白金被覆と耐火
物との密着性が部分的に損なわれ、白金板が耐火物から
部分的に浮き上がることがあった。このとき、成形体の
表面に生じた凹凸のため、溶融ガラスが全体に渡って均
一な厚さで流下することができず、成形されるガラス板
の形状精度が著しく損なわれる。このため、ガラス板の
製造を一時中断し、成形体を補修或いは交換しなければ
ならないという問題点があった。However, when a glass sheet is formed by using a molded body obtained by coating a refractory brick or the like with platinum in this manner, high temperature molten glass from the top of the molded body runs along the front and back surfaces of the molded body. When flowing down, due to the difference in thermal expansion between the platinum coating on the surface of the molded product and the refractory inside, the adhesion between the platinum coating and the refractory is partially impaired, and the platinum plate rises partially from the refractory. was there. At this time, due to the irregularities formed on the surface of the molded body, the molten glass cannot flow down with a uniform thickness over the whole, and the shape accuracy of the molded glass sheet is significantly impaired. Therefore, there has been a problem that the production of the glass plate must be temporarily stopped and the molded body must be repaired or replaced.
【０００６】また、上記熱膨張の差により、あるいは他
の何等かの原因により、被覆白金板に亀裂や穴が生じた
ときも、成形されるガラス板の形状精度が著しく損なわ
れる。この場合も、ガラス板の製造を一時中断し、成形
体を補修或いは交換する必要がある。このため、被覆白
金板の亀裂や穴が生じたことを迅速に発見することが望
まれている。Further, even when a crack or a hole is formed in the coated platinum plate due to the difference in thermal expansion or some other cause, the shape accuracy of the glass plate to be molded is significantly impaired. Also in this case, it is necessary to temporarily stop the production of the glass plate and repair or replace the molded body. Therefore, it is desired to quickly find out that cracks or holes have occurred in the coated platinum plate.
【０００７】さらに、成形体が位置する炉室内の成形雰
囲気は、溶融ガラスが成形体に沿って均一な厚さで流れ
るように比較的高温に保たれているが、高すぎると、成
形体の下端部で合流し、融着したガラスは、ガラスの表
面張力の作用により、幅方向に大きく収縮し、ガラス板
の幅方向の平坦な部分が小さくなり好ましくない。した
がって、前記成形雰囲気の温度は比較的低温に保たれる
が、低温過ぎると、炉内にはその下方からガラス板に沿
って上昇してくる低温の気流があり、このため成形体の
溶融ガラスで覆われていない側縁部は冷却され、成形体
の側縁部近くを流下する溶融ガラスの熱を奪い、ガラス
板の幅方向端部が融着しがたいという問題点があった。Furthermore, the molding atmosphere in the furnace chamber in which the molded body is located is kept at a relatively high temperature so that the molten glass flows with a uniform thickness along the molded body. The glass merged and fused at the lower end is greatly undesirably contracted in the width direction due to the effect of the surface tension of the glass, and the flat portion in the width direction of the glass plate becomes small. Therefore, the temperature of the forming atmosphere is kept relatively low, but if the temperature is too low, there is a low-temperature airflow rising along the glass plate from below in the furnace, and therefore the molten glass of the formed body is formed. There is a problem that the side edge portion not covered with is cooled, the heat of the molten glass flowing near the side edge portion of the molded body is taken away, and the widthwise end portion of the glass plate is difficult to be fused.
【０００８】本発明は、上記問題点を解決するために為
されたものである。すなわち本発明の第１の目的は、表
面形状精度の高いガラス板を得るため、ガラス板の成形
中、成形体の耐火物と該耐火物を覆う白金板との密着性
が損なわれて白金板が部分的に浮き上がることのない成
形体を提供することにある。また、本発明の第２の目的
は、幅広のガラス板を得るため、成形体の下端部で合流
する溶融ガラスをガラス板の全幅に渡って融着し得る成
形体を提供することにある。さらに本発明の第３の目的
は、耐火性本体と被覆板との密着性が維持され、被覆板
の変形を防止できるとともに、被覆白金板の亀裂や穴の
発生を検知することのできる成形体を提供することにあ
る。The present invention has been made to solve the above problems. That is, the first object of the present invention is to obtain a glass plate having a high surface shape accuracy, so that during molding of the glass plate, the adhesion between the refractory material of the molded body and the platinum plate covering the refractory material is impaired, and the platinum plate The object is to provide a molded body that does not partially float. Further, a second object of the present invention is to provide a molded body capable of fusing the molten glass that joins at the lower end of the molded body over the entire width of the glass plate in order to obtain a wide glass plate. Further, a third object of the present invention is to provide a molded article capable of maintaining adhesion between the refractory body and the cover plate, preventing deformation of the cover plate, and detecting cracks or holes in the cover platinum plate. To provide.
【０００９】[0009]
【課題を解決するための手段】第１の目的を達成する本
発明によるガラス板製造用成形体は、溶融ガラスが供給
される頂部と、前記溶融ガラスが合流してガラス板とな
る下端部と、前記頂部からの溶融ガラスが分流して前記
下端部の方向へ流下する中央部と該中央部に隣接する２
つの側縁部とから成り前記下端部において近接した幅広
の表裏面と、前記表裏面に隣接する２つの端面とを有す
る耐火性の本体と、前記本体の全表面を覆う白金または
白金合金板の被覆と、を備え、前記中央部、側縁部及び
端面のそれぞれの部分の被覆の厚さを次のうちのいずれ
かとしたことを特徴とする。 （ａ）中央部の被覆を端面及び側縁部の被覆より厚くす
る。 （ｂ）中央部の被覆を端面の被覆より厚くし、かつ側縁
部の被覆を中央部と同じ厚さにする。 （ｃ）中央部の被覆を端面の被覆と同じ厚さにし、かつ
中央部の被覆を側縁部の被覆より厚くする。[Means for Solving the Problems] A molded article for producing a glass plate according to the present invention, which achieves the first object, comprises a top portion to which molten glass is supplied and a lower end portion where the molten glass joins to form a glass sheet. , A central portion adjacent to the central portion where the molten glass is branched from the top portion and flows down toward the lower end portion 2
A refractory body having a wide front and back surfaces that are close to each other at the lower end and two end surfaces adjacent to the front and back surfaces; and a platinum or platinum alloy plate that covers the entire surface of the main body. A coating is provided, and the thickness of the coating of each of the central portion, the side edge portion and the end surface is set to any one of the following. (A) The coating of the central portion is made thicker than the coating of the end faces and the side edge portions. (B) The coating of the central portion is made thicker than the coating of the end face, and the coating of the side edge portion is made the same thickness as the central portion. (C) The coating of the central portion has the same thickness as the coating of the end surface, and the coating of the central portion is thicker than the coating of the side edge portions.
【００１０】第２の目的を達成する本発明による他のガ
ラス板製造用成形体は、溶融ガラスが供給される頂部と
前記溶融ガラスが合流してガラス板となる下端部と、前
記頂部からの溶融ガラスが分流して前記下端部の方向へ
流下する中央部と該中央部に隣接する２つの側縁部とか
ら成り前記下端部において近接した幅広の表裏面と、前
記表裏面に隣接する２つの端面とを有する耐火性の本体
と、前記本体の全表面を覆う白金または白金合金板の被
覆とを備えるガラス板製造用成形体であって、前記下端
部において前記成形体の幅方向に亘って形成され、該下
端部における前記被覆の垂直方向の厚さよりも大きい高
さの白金または白金合金材の中実体と、を備えることを
特徴とする。Another molded article for producing a glass plate according to the present invention, which achieves the second object, comprises a top portion to which molten glass is supplied, a lower end portion where the molten glass merges to form a glass sheet, and a top portion from the top portion. A wide front and back surfaces that are close to each other at the lower end portion and that are composed of a central portion where the molten glass splits and flows down toward the lower end portion and two side edge portions that are adjacent to the central portion; A fire-resistant main body having one end face and a platinum or platinum alloy plate coating covering the entire surface of the main body, the molded body for glass plate production, wherein the bottom end extends in the width direction of the molded body. And a solid body of platinum or a platinum alloy material having a height larger than the vertical thickness of the coating at the lower end portion.
【００１１】第３の目的を達成する本発明によるさらに
他のガラス板製造用成形体は、溶融ガラスが供給される
頂部と前記溶融ガラスが合流してガラス板となる下端部
と、前記頂部からの溶融ガラスが分流して前記下端部の
方向へ流下する中央部と該中央部に隣接する２つの側縁
部とから成り前記下端部において近接した幅広の表裏面
と、前記表裏面に隣接する２つの端面とを有する耐火性
の本体と、前記本体の全表面を覆う白金または白金合金
板の被覆と、前記被覆と前記本体との間を負圧により吸
引する吸引手段と、を備えることを特徴とする。According to still another aspect of the present invention for attaining the third object, there is provided a glass sheet manufacturing molded article, wherein a top portion to which molten glass is supplied, a lower end portion where the molten glass joins to form a glass sheet, and the top portion. Adjacent to the front and back surfaces, and a wide front and back surface close to each other at the lower end portion, which is composed of a central portion of the molten glass that flows down toward the lower end portion and two side edge portions adjacent to the central portion. A refractory body having two end faces; a platinum or platinum alloy plate coating covering the entire surface of the body; and suction means for sucking a negative pressure between the coating and the body. Characterize.
【００１２】[0012]
【作用】成形体の耐火性の本体を白金または白金合金板
で被覆し、溶融ガラスが分流して流下する中央部の被覆
の厚さを、中央部の被覆を端面及び側縁部の被覆より厚
くするか、中央部の被覆を端面の被覆より厚くし、かつ
側縁部の被覆を中央部と同じ厚さにするか、あるいは中
央部の被覆を端面の被覆と同じ厚さにし、かつ中央部の
被覆を側縁部の被覆より厚くしたことにより、成形体と
被覆板との熱膨張の差によって生じる被覆板の変形が、
被覆板の薄い部分に生じ、溶融ガラスと接する中央部分
の被覆の変形を防止することができる。[Function] The refractory body of the molded body is coated with platinum or a platinum alloy plate, and the thickness of the coating at the central portion where the molten glass is shunted and flows down from the coating on the end surface and side edge portions Thicker, or the central coating is thicker than the end coating and the side edge coating is the same thickness as the central coating, or the central coating is the same thickness as the end coating and the central coating is By making the coating of the portion thicker than the coating of the side edge portion, the deformation of the coating plate caused by the difference in thermal expansion between the molded body and the coating plate,
It is possible to prevent the deformation of the coating of the central portion which occurs in the thin portion of the cover plate and contacts the molten glass.
【００１３】また、成形体の下端部をその下端部の被覆
の垂直方向の厚さよりも大きい高さの白金または白金合
金材で形成した中実体とすることにより、下方からの低
温の上昇気流にさらされている成形体の側縁部は、溶融
ガラスから常に熱の供給を受けている中央部（流下面）
から、中実体を介して熱の供給を受け、成形体の側縁部
近くを流れるガラスの温度の局部的低下が防止され、成
形体の下端部で合流したガラスはガラス板の全幅に亘っ
て融着される。Further, by making the lower end portion of the molded body a solid body formed of platinum or a platinum alloy material having a height larger than the vertical thickness of the coating of the lower end portion, a low temperature rising air flow from below is formed. The side edge of the exposed molded body is the central portion (the lower surface) where heat is constantly supplied from the molten glass.
From the above, heat is supplied via the solid body, the local decrease of the temperature of the glass flowing near the side edge of the molded body is prevented, and the glass joined at the lower end of the molded body spans the entire width of the glass plate. Fused.
【００１４】さらに、成形体を真空引きするための吸引
手段を成形体に設けたことにより、耐火性本体と被覆板
との密着性が維持され、被覆板の変形を防止することが
できると共に、万一被覆板に亀裂等が生じた場合に真空
圧力の変化によりそのような事態を検知することができ
る。Further, by providing the molded body with suction means for evacuating the molded body, the adhesion between the refractory body and the cover plate can be maintained and deformation of the cover plate can be prevented. If a crack or the like occurs in the coated plate, such a situation can be detected by the change in vacuum pressure.
【００１５】[0015]
【実施例】以下、図面に示した実施例に基づいて本発明
を説明する。図１は本発明によるガラス板製造用成形体
の一実施例を用いたガラス板の製造装置の縦断面図を概
略的に示す図、図２ａは成形体の正面図、図２ｂは図２
ａのＡ−Ａ’端面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a diagram schematically showing a vertical cross-sectional view of a glass plate manufacturing apparatus using an embodiment of a molded product for manufacturing a glass plate according to the present invention, FIG. 2a is a front view of the molded product, and FIG. 2b is FIG.
It is an AA 'end view of a.
【００１６】図において、１は炉壁であり、炉壁１内は
隔壁２により成形室（上室）３とローラ室（下室）４と
に区切られている。成形室３内には図示しない支持手段
によって支持された成形体５が納められ、複数個の抵抗
発熱体６に通電することにより、９３０〜９７０℃に制
御されている。In the figure, 1 is a furnace wall, and the inside of the furnace wall 1 is divided by a partition wall 2 into a molding chamber (upper chamber) 3 and a roller chamber (lower chamber) 4. A molded body 5 supported by a supporting means (not shown) is housed in the molding chamber 3 and is controlled to 930 to 970 ° C. by energizing a plurality of resistance heating elements 6.
【００１７】ローラ室４には、成形されたガラス板７を
下方に引くためのローラ８が図示しない支持手段により
支持され、図示しない駆動手段により駆動されている。
このローラ室４はほぼ６５０℃に保持されている。In the roller chamber 4, a roller 8 for pulling the molded glass plate 7 downward is supported by a supporting means (not shown) and driven by a driving means (not shown).
The roller chamber 4 is maintained at about 650 ° C.
【００１８】成形体５の本体９はアルミナ質の電鋳材料
等の耐火性材料から成り、溶融ガラスが供給される頂部
１０と、溶融ガラスが合流してガラス板７となる下端部
１１と、下端部１１において近接した幅広の表裏面１３
と、表裏面１３に隣接する２つの端面１２と、を有し、
全表面を薄い白金または白金合金板の被覆１５により覆
われている。表裏面１３は頂部１０に供給された溶融ガ
ラスが分流して下端部１１の方向へ流下する中央部１３
ａと該中央部１３ａの両側に隣接する２つの側縁部１３
ｂから成る。The body 9 of the molded body 5 is made of a refractory material such as an alumina electroformed material, and has a top portion 10 to which molten glass is supplied and a lower end portion 11 where the molten glass joins to form a glass plate 7. Wide front and back surfaces 13 that are close to each other at the lower end portion 11
And two end faces 12 adjacent to the front and back surfaces 13,
The entire surface is covered with a thin platinum or platinum alloy plate coating 15. The front and back surfaces 13 have a central portion 13 in which the molten glass supplied to the top portion 10 splits and flows down toward the lower end portion 11.
a and two side edge portions 13 adjacent to both sides of the central portion 13a
It consists of b.
【００１９】頂部１０にはスリット状に開口した溜部１
６が設けられている。A reservoir 1 having a slit-like opening is provided on the top 10.
6 is provided.
【００２０】中央部１３ａと側縁部１３ｂの間には、溶
融ガラスの広がりを制御するためのガイド壁１７，１７
が設けられ、このガイド壁１７，１７によって溶融ガラ
スは側縁部１３ｂを通らないようにされている。Between the central portion 13a and the side edge portion 13b, there are guide walls 17, 17 for controlling the spread of the molten glass.
Is provided, and the guide walls 17 prevent molten glass from passing through the side edge portion 13b.
【００２１】使用される耐火性の本体９の材質は、白金
板を腐蝕しない各種耐火レンガ、セラミックス等であ
り、さらにモリブデンやタングステン等の金属をアルミ
ナ質のもので被覆したものでも良い。The material of the refractory body 9 used is various refractory bricks that do not corrode the platinum plate, ceramics and the like, and may be a material such as molybdenum or tungsten coated with alumina.
【００２２】被覆１５の厚さは、中央部１３ａの被覆１
５を端面１２及び側縁部１３ｂの被覆１５より厚くし
た。本実施例においては溶融ガラスが流下する中央部１
３ａの被覆１５の厚さを０．７５ｍｍ（好ましい範囲は
０．６〜１．５ｍｍである。）、側縁部１３ｂ及び端面
１２の被覆１５の厚さを０．５ｍｍとした。The thickness of the coating 15 is the same as that of the coating 1 on the central portion 13a.
5 is thicker than the coating 15 on the end face 12 and the side edge portion 13b. In this embodiment, the central portion 1 through which the molten glass flows down
The thickness of the coating 15 of 3a was 0.75 mm (a preferable range is 0.6 to 1.5 mm), and the thickness of the coating 15 of the side edge portion 13b and the end face 12 was 0.5 mm.
【００２３】このように、中央部１３ａの被覆１５を端
面１２及び側縁部１３ｂの被覆よりも厚くした理由は、
溶融ガラスと接する中央部１３ａの被覆１５を相対的に
厚くすることにより、中央部１３ａの被覆１５の相対的
な強度を増して局部的な被服板の変形を押えることにあ
る。すなわち、耐火性の本体９と被覆板１５との熱膨張
の差によって生じる変形を、成形体５の端面１２及び側
縁部１３ｂの相対的に被覆１５の薄い部分を変形しやす
くして、熱膨張の差によって生じる変形を成形体５の端
面１２及び側縁部１３ｂに集中させて溶融ガラスと接す
る部分の変形を防止し、表面形状精度の良いガラス板を
得ることにある。なお、耐火物、たとえば高アルミナ質
電鋳レンガと白金板の２０〜１０００℃における平均線
膨張係数は、それぞれ４〜８×１０-6／℃、１０．２×
１０-6／℃であり、伸びにかなりの差がある。The reason why the coating 15 on the central portion 13a is thicker than the coatings on the end surface 12 and the side edge portions 13b is as follows.
By making the coating 15 of the central portion 13a in contact with the molten glass relatively thick, the relative strength of the coating 15 of the central portion 13a is increased to suppress the local deformation of the clothing plate. That is, the deformation caused by the difference in thermal expansion between the fire-resistant main body 9 and the covering plate 15 makes it easier to deform the relatively thin portion of the covering 15 on the end face 12 and the side edge portion 13b of the molded body 5, and The purpose is to concentrate the deformation caused by the difference in expansion on the end surface 12 and the side edge portion 13b of the molded body 5 to prevent the deformation of the portion in contact with the molten glass and to obtain a glass plate having a high surface shape accuracy. The average linear expansion coefficient of the refractory, for example, high alumina electroformed brick and platinum plate at 20 to 1000 ° C. is 4 to 8 × 10 −6 / ° C. and 10.2 ×, respectively.
It is 10 −6 / ° C., and there is a considerable difference in elongation.
【００２４】上記においては中央部１３ａの被覆１５を
端面１２及び側縁部１３ｂの被覆より厚くした場合につ
いて説明したが、被覆１５の厚さはこれに限らず、中央
部１３ａの被覆１５を端面１２の被覆より厚くし、かつ
側縁部１３ｂの被覆１５を中央部１３ａと同じ厚さにし
ても同様な効果を得ることができる。たとえば中央部１
３ａ及び側縁部１３ｂの被覆の厚さを１．３ｍｍ、端面
１２の被覆の厚さを１．０ｍｍとすることができる。あ
るいはまた、中央部１３ａの被覆１５を端面１２の被覆
と同じ厚さにし、かつ中央部１３ａの被覆１５を側縁部
１３ｂの被覆より厚くしても同様な効果を得ることがで
きる。たとえば中央部１３ａ及び端面１２を１．３ｍ
ｍ、側縁部１３ｂを１．０ｍｍとする。In the above description, the case where the coating 15 of the central portion 13a is thicker than the coating of the end surface 12 and the side edge portion 13b has been described. However, the thickness of the coating 15 is not limited to this, and the coating 15 of the central portion 13a is formed into the end surface. The same effect can be obtained by making the coating 12 thicker than 12 and the coating 15 of the side edge portion 13b the same thickness as the central portion 13a. For example, central part 1
The coating thickness of 3a and the side edge portion 13b can be 1.3 mm, and the coating thickness of the end face 12 can be 1.0 mm. Alternatively, the same effect can be obtained by making the coating 15 of the central portion 13a the same thickness as the coating of the end surface 12 and making the coating 15 of the central portion 13a thicker than the coating of the side edge portion 13b. For example, the central portion 13a and the end face 12 are 1.3 m
m, and the side edge portion 13b is 1.0 mm.
【００２５】この場合、中央部１３ａの被覆１５の厚さ
と他の被覆を薄くした部分の被覆の厚さの差を被覆１５
を薄くした部分の被覆の厚さの２０％未満としたとき、
上述したような効果があまり得られず、溶融ガラスと接
する中央部１３ａにも被覆白金板１５の変形が認められ
た。したがって、中央部１３ａの被覆は、被覆１５を薄
くした部分の被覆よりも２０％以上厚くするのが好まし
い。In this case, the difference between the thickness of the coating 15 on the central portion 13a and the thickness of the coating on the thinned portion of the other coating is taken as the coating 15
When less than 20% of the coating thickness of the thinned part,
The effect as described above was not obtained so much, and the coated platinum plate 15 was also deformed in the central portion 13a in contact with the molten glass. Therefore, the coating of the central portion 13a is preferably 20% or more thicker than the coating of the thinned portion of the coating 15.
【００２６】図２ａにおいて、１８は成形体５の端面１
２に付設された吸引口であり、図示しない真空ポンプに
接続されている。ガラス板の製造中、この吸引口１８が
被覆１５を成形体５の本体９側へ負圧により吸引する。
このため成形体５の本体９と被覆１５とが密着状態に維
持され、被覆白金板１５の変形が防止される。本実施例
では、吸引口１８からゲージ圧にて５×１０-4Ｔｏｒｒ
で真空引きした。In FIG. 2a, 18 is the end face 1 of the molded body 5.
2 is a suction port attached to the unit 2 and is connected to a vacuum pump (not shown). During manufacture of the glass plate, the suction port 18 sucks the coating 15 toward the main body 9 side of the molded body 5 by negative pressure.
Therefore, the main body 9 of the molded body 5 and the coating 15 are kept in close contact with each other, and the deformation of the coated platinum plate 15 is prevented. In this embodiment, the pressure is 5 × 10 −4 Torr from the suction port 18 with a gauge pressure.
I evacuated.
【００２７】このように吸引手段により真空引きする
と、真空度の変化を検出することにより、被覆白金板１
５に亀裂や穴があく等の事故を検知することが可能とな
る。When the vacuum is drawn by the suction means in this way, the coated platinum plate 1 is detected by detecting the change in the degree of vacuum.
It is possible to detect an accident such as a crack or a hole in 5.
【００２８】成形体５の中央部１３ａの上を流れるガラ
スは、表面張力によって幅方向中央部に向って収縮す
る。本発明者等は、このときの収縮量の大小が、ガラス
の粘度に加えて、成形体５の下端部１１の表裏面がなす
角度αによっても左右されることを見いだした。すなわ
ちこの角度αが大きくなればなるほど、成形体５の下端
部１１の面上を流れる溶融ガラスに作用する下方への重
力が大きくなっていく。そしてこの角度αが４０度を超
えると、溶融ガラスに作用する重力が、成形体５の表面
上での溶融ガラスの界面張力に打ち勝ち、溶融ガラスは
成形体５の表面上から離間しやすくなる。その結果、溶
融ガラスは次第に粘度の大きなガラス流の縁の方から離
間して、得られるガラス板７の幅が狭くなる。たとえ
ば、角度αが５０度の場合、３０度の場合に対してガラ
ス板７の板幅が５％狭くなった。The glass flowing over the central portion 13a of the molded body 5 contracts toward the central portion in the width direction due to surface tension. The present inventors have found that the amount of shrinkage at this time depends not only on the viscosity of the glass but also on the angle α formed by the front and back surfaces of the lower end 11 of the molded body 5. That is, the greater the angle α, the greater the downward gravity acting on the molten glass flowing on the surface of the lower end 11 of the molded body 5. When this angle α exceeds 40 degrees, the gravity acting on the molten glass overcomes the interfacial tension of the molten glass on the surface of the molded body 5, and the molten glass easily separates from the surface of the molded body 5. As a result, the molten glass gradually separates from the edge of the viscous glass stream, and the width of the glass plate 7 obtained becomes narrower. For example, when the angle α is 50 degrees, the width of the glass plate 7 is 5% narrower than when the angle α is 30 degrees.
【００２９】一方、角度αが２０度未満の場合では、成
形体５を製造する際、本体９の下端部１１が鋭角すぎて
加工の際欠けやすい。また、溶融ガラスを成形体５の頂
部１０へ供給する関係上、頂部１０はそれなりの厚みが
必要なので、角度αをあまり小さくすると成形体５の縦
方向の長さが必要以上に大きくなり、面上を流下するガ
ラスの冷却が過度に進み融着し難くなる。さらに、成形
体５の表面積がその分増すため、被覆する白金板の使用
量も増え、コスト的に好ましくない。このため、好まし
い角度は２０度〜４０度である。本実施例では、下端部
１１の角度αは３０度とした。成形体５のサイズは全幅
８００ｍｍ、ガイド壁１７，１７間の距離を６００ｍ
ｍ、高さを１９０ｍｍとした。On the other hand, when the angle α is less than 20 degrees, the lower end 11 of the main body 9 is too acute when the molded body 5 is manufactured, and is easily chipped during processing. Further, since the molten glass is supplied to the top 10 of the molded body 5, the top 10 needs to have a certain thickness. Therefore, if the angle α is made too small, the length of the molded body 5 in the vertical direction becomes unnecessarily large. The glass flowing down above is excessively cooled and it becomes difficult to fuse the glass. Furthermore, since the surface area of the molded body 5 increases by that amount, the amount of the platinum plate used for coating increases, which is not preferable in terms of cost. Therefore, the preferable angle is 20 to 40 degrees. In this embodiment, the angle α of the lower end 11 is 30 degrees. The size of the molded body 5 is 800 mm in total width, and the distance between the guide walls 17 is 600 m.
m and the height was 190 mm.
【００３０】次に、以上述べた成形体５を用いたガラス
板製造装置により、ガラス板を製造した結果を説明す
る。ほぼ９５０℃のＳｉＯ2 ，Ｂ2Ｏ3 を主成分とする
硼珪酸塩系の溶融ガラスを図示しない供給管から成形体
５の頂部１０の溜部１６へ連続的に供給する。供給され
た溶融ガラスは、上方に向けてスリット状に開口した成
形体５の頂部１０から溢出し、中央部１３ａの表裏面に
向って分流した後、水平方向に広がり、左右のガイド壁
１７，１７によって規制されながら一様な厚さで中央部
１３ａに接して流下し、成形体５の下端部１１で合流す
る。このとき溶融ガラスの温度は約９００℃に降下して
いて、ガラス板７となり、ローラ８によって下方に引き
抜かれ、４０ｍ／ｈｒの速度で幅５５０ｍｍ、厚さ１．
１ｍｍのガラス板が製造された。Next, the result of manufacturing a glass plate by the glass plate manufacturing apparatus using the molded body 5 described above will be described. Borosilicate-based molten glass containing SiO 2 and B 2 O 3 as main components at approximately 950 ° C. is continuously supplied from a supply pipe (not shown) to the reservoir 16 at the top 10 of the molded body 5. The supplied molten glass overflows from the top 10 of the molded body 5 which is opened upward in a slit shape, splits toward the front and back surfaces of the central portion 13a, then spreads horizontally, and the left and right guide walls 17, While being regulated by 17, it comes into contact with the central portion 13a with a uniform thickness and flows down, and joins at the lower end portion 11 of the molded body 5. At this time, the temperature of the molten glass has dropped to about 900 ° C., the glass plate 7 is formed, is drawn downward by the roller 8, and has a width of 550 mm at a speed of 40 m / hr and a thickness of 1.
A 1 mm glass plate was produced.
【００３１】ガラス板７の成形中真空引きを続けたこと
及び中央部１３ａの被覆１５の厚みを端面１２の被覆よ
りも相対的に厚くしたことによって、中央部１３ａの被
覆１５は長期に渡って変形が防止され、形状精度の優れ
たガラス板が得られた。Since the vacuum drawing is continued during the molding of the glass plate 7 and the thickness of the coating 15 on the central portion 13a is made relatively thicker than the coating on the end face 12, the coating 15 on the central portion 13a is maintained for a long period of time. Deformation was prevented and a glass plate with excellent shape accuracy was obtained.
【００３２】また、成形体５の下端部１１の角度を３０
度としたことにより、ガイド壁１７，１７間の幅６００
ｍｍに対して収縮量の小さい５５０ｍｍ幅のガラス板が
得られた。The angle of the lower end 11 of the molded body 5 is set to 30.
Depending on the degree, the width between the guide walls 17, 17 is 600
A glass plate with a width of 550 mm having a small shrinkage amount with respect to mm was obtained.
【００３３】さらに、得られたガラス板は、ガラス板の
中央部３００ｍｍ幅で厚さ１．１ｍｍ±１０μ、中央部
３００ｍｍスパンでの反り（両端を結んだ直線から、そ
の直角方向へのガラス面までの最大距離を、両端間の長
さで割った値）は０．１％以下、表面の凹凸が０．１μ
以下であり、形状精度が極めて高く、研磨をする必要の
ない品質レベルであった。Furthermore, the obtained glass plate has a width of 300 mm at the central portion of the glass plate, a thickness of 1.1 mm ± 10 μ, and a warp at a span of 300 mm at the central portion (from a straight line connecting both ends to a glass surface in the direction perpendicular to the glass surface). Value obtained by dividing the maximum distance up to the distance between both ends) is 0.1% or less, and the surface unevenness is 0.1μ.
It was below, and the shape accuracy was extremely high, and the quality level did not require polishing.
【００３４】図３は本発明によるガラス板製造用成形体
の他の実施例の縦断面図を示す。本実施例は、成形体５
の下端部１１を白金または白金合金材で形成された中実
体１９とした以外は前述の実施例と同じである。この中
実体１９は成形体５の全幅に渡る棒状のもので、断面が
図示のように三角形である。本実施例においてはこの三
角形の断面の高さは２５ｍｍとした。FIG. 3 is a vertical sectional view of another embodiment of the molded article for producing a glass plate according to the present invention. In this example, the molded body 5
This is the same as the above-described embodiment except that the lower end portion 11 of the above is a solid body 19 formed of platinum or a platinum alloy material. The solid body 19 is a rod-shaped member extending over the entire width of the molded body 5 and has a triangular cross section as shown in the drawing. In this example, the height of the cross section of this triangle was 25 mm.
【００３５】成形体５の頂部１０から成形体の中央部１
３ａの表裏面に沿って流下する溶融ガラスは、成形体５
の下端部にて融着してガラス板７が形成されるが、この
成形体５の側縁部１３ｂは融着ガラスと接せず、かつガ
ラス板７に沿って下方から上昇してくる冷風によって熱
が奪われるため、中央部１３ａより温度が低い。したが
って、成形体５の側縁部１３ｂ近くを流下する溶融ガラ
スは中央部を流下する溶融ガラスよりも成形体５に熱を
奪われて温度が低く、その部分すなわち溶融ガラスの幅
方向端部近傍は融着しがたくなっているが、本実施例で
は成形体５の下端部１１をその下端から上方に少なくと
も５ｍｍの高さの熱伝導性の良い白金材で形成した中実
体（インゴット）１９とすることによって、中実体１９
部分は中央部１３ａの熱が側方に十分供給されて幅方向
に均一な温度に保持される。このため、流下する溶融ガ
ラスは幅方向全体に渡って融着し、温度分布がよいた
め、成形されるガラス板７の肉厚分布も変動幅が極めて
小さく、かつ表面形状精度も改善された。なお、成形体
５の下端部１１の中実体１９の高さを５ｍｍ未満とした
場合、中央部１３ａからの熱の供給量及び温度の均一化
の効果が小さかったので５ｍｍ以上とするのが好まし
い。From the top 10 of the compact 5 to the central part 1 of the compact
The molten glass flowing down along the front and back surfaces of 3a is the molded body 5
The glass plate 7 is formed by fusion at the lower end of the glass plate 7. However, the side edge 13b of the molded body 5 does not come into contact with the fused glass and the cold air rising from below along the glass plate 7 Since the heat is taken away by the heat, the temperature is lower than that in the central portion 13a. Therefore, the temperature of the molten glass flowing down near the side edge portion 13b of the molded body 5 is lower than that of the molten glass flowing down the central portion by the molded body 5, and the temperature thereof is lower. Is less likely to be fused, but in this embodiment, the lower end 11 of the molded body 5 is formed of a platinum material having a height of at least 5 mm and having good heat conductivity from the lower end thereof. By doing, the solid body 19
In the portion, the heat of the central portion 13a is sufficiently supplied to the side and is maintained at a uniform temperature in the width direction. For this reason, the molten glass that flows down is fused over the entire width direction and has a good temperature distribution, so that the thickness distribution of the glass plate 7 to be molded has a very small fluctuation range and the surface shape accuracy is improved. When the height of the solid body 19 of the lower end portion 11 of the molded body 5 is less than 5 mm, the effect of equalizing the amount of heat supplied from the central portion 13a and the temperature is small, so that the height is preferably 5 mm or more. ..
【００３６】なお、ガラス板７の成形量が少なく溶融ガ
ラスが保有する熱量が不十分なため成形体５の下端部１
１での融着が完全でないときは、中実体１９の両端に電
力の入出力端子を接続し、通電することによって発生す
るジュール熱を利用することもできる。Since the glass plate 7 has a small amount of molding and the amount of heat held by the molten glass is insufficient, the lower end portion 1 of the molded body 5
When fusion at 1 is not complete, it is also possible to use Joule heat generated by connecting power input / output terminals to both ends of the solid body 19 and energizing.
【００３７】本実施例では中実体１９に通電しなかった
が、下端部１１で合流した溶融ガラスは、その全幅に渡
って完全に融着して幅広のガラス板７を得ることがで
き、かつガラス板７の形状精度も前述の実施例と同様に
極めて精度の高いものであった。In the present embodiment, the solid body 19 was not energized, but the molten glass joined at the lower end portion 11 can be completely fused over the entire width to obtain a wide glass plate 7, and The shape accuracy of the glass plate 7 was also extremely high as in the above-mentioned embodiment.
【００３８】以上主に図面に示した実施例に基づいて本
発明を説明したが、本発明はこれらの実施例には限定さ
れず、特許請求の範囲に記載した範囲内において種々変
形可能である。Although the present invention has been described mainly based on the embodiments shown in the drawings, the present invention is not limited to these embodiments and can be variously modified within the scope of the claims. ..
【００３９】[0039]
【発明の効果】本発明のガラス板製造用成形体によれ
ば、成形体の耐火性の本体を白金または白金合金板で被
覆し、溶融ガラスが分流して流下する中央部の被覆の厚
さを、中央部の被覆を端面及び側縁部の被覆より厚くす
るか、中央部の被覆を端面の被覆より厚くし、かつ側縁
部の被覆を中央部と同じ厚さにするか、あるいは中央部
の被覆を端面の被覆と同じ厚さにし、かつ中央部の被覆
を側縁部の被覆より厚くしたことにより、溶融ガラスと
接する中央部分の被覆の変形を防止することができ、そ
の結果、表面形状精度の高いガラス板を得ることができ
た。According to the molded product for producing a glass plate of the present invention, the refractory body of the molded product is coated with platinum or a platinum alloy plate, and the thickness of the coating at the central portion where the molten glass is diverted and flows down. Is thicker than the coating on the end faces and side edges, or the central coating is thicker than the coating on the end faces and the side edge coating is the same thickness as the central portion, or By making the coating of the portion the same thickness as the coating of the end surface and making the coating of the central portion thicker than the coating of the side edge portion, it is possible to prevent deformation of the coating of the central portion in contact with the molten glass, and as a result, It was possible to obtain a glass plate with high surface shape accuracy.
【００４０】また、本発明のガラス板製造用成形体によ
れば、成形体の下端部をその下端部の被覆の垂直方向の
厚さよりも大きい高さの白金または白金合金材で形成し
た中実体とすることにより、成形体の下端部で合流した
ガラスをガラス板の全幅に渡って融着させることがで
き、幅広のガラス板を得ることができた。Further, according to the molded article for producing a glass plate of the present invention, a solid body in which the lower end portion of the molded article is formed of platinum or a platinum alloy material having a height larger than the vertical thickness of the coating on the lower end portion. By this, the glass joined at the lower end of the molded body could be fused over the entire width of the glass plate, and a wide glass plate could be obtained.
【００４１】さらに、本発明のガラス板製造用成形体に
よれば、成形体を真空引きするための吸引手段を成形体
に設けたことにより、被覆板の変形をさらに防止するこ
とができるので表面形状精度の高いガラス板を得ること
ができたことに加え、被覆板に亀裂等が生じた場合に真
空圧力の変化によりそのような事態を検知することがで
きる。Further, according to the molded article for producing a glass plate of the present invention, since the molded body is provided with the suction means for evacuating the molded article, the deformation of the cover plate can be further prevented, and thus the surface can be prevented. In addition to being able to obtain a glass plate having high shape accuracy, such a situation can be detected by a change in vacuum pressure when a crack or the like occurs in the cover plate.
【図１】本発明によるガラス板製造用成形体の一実施例
を用いたガラス板の製造装置の縦断面図を概略的に示す
図である。FIG. 1 is a diagram schematically showing a vertical cross-sectional view of a glass plate manufacturing apparatus using an embodiment of a molded product for manufacturing a glass plate according to the present invention.
【図２】本発明によるガラス板製造用成形体を示す図で
あり、図２ａは成形体の正面図、図２ｂは図２ａのＡ−
Ａ’端面図である。FIG. 2 is a view showing a molded body for producing a glass plate according to the present invention, FIG. 2a is a front view of the molded body, and FIG. 2b is A- of FIG. 2a.
It is an A'end view.
【図３】本発明によるガラス板製造用成形体の他の実施
例の縦断面図である。FIG. 3 is a vertical cross-sectional view of another embodiment of the molded article for producing a glass plate according to the present invention.
１ 炉壁 ２ 隔壁 ３ 成形室 ４ ローラ室 ５ 成形体 ６ 抵抗発熱体 ７ ガラス板 ８ ローラ ９ 本体 １０ 頂部 １１ 下端部 １２ 端面 １３ 表裏面 １３ａ 中央部 １３ｂ 側縁部 １５ 被覆 １６ 溜部 １７ ガイド壁 １８ 吸引口 １９ 中実体 DESCRIPTION OF SYMBOLS 1 furnace wall 2 partition wall 3 forming chamber 4 roller chamber 5 forming body 6 resistance heating element 7 glass plate 8 roller 9 main body 10 top 11 lower end 12 end 13 front and back 13a center 13b side edge 15 coating 16 reservoir 17 guide wall 18 Suction port 19 Solid body
───────────────────────────────────────────────────── フロントページの続き (72)発明者 苅谷 浩幸 東京都新宿区中落合２丁目７番５号 ホー ヤ株式会社内 (72)発明者 内田 一弥 東京都新宿区中落合２丁目７番５号 ホー ヤ株式会社内 (72)発明者 遠藤 栄昭 東京都新宿区中落合２丁目７番５号 ホー ヤ株式会社内 (72)発明者 星野 和彦 大阪府大阪市中央区道修町３丁目５番11号 日本板硝子株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Kariya 2-7-5 Nakaochiai Shinjuku-ku, Tokyo Within Hoya Co., Ltd. (72) Inventor Kazuya Uchida 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Hoya Co., Ltd. (72) Inventor Eiaki Endo 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Hoya Co., Ltd. (72) Inventor Kazuhiko Hoshino 3-5-11 Doshomachi, Chuo-ku, Osaka-shi, Osaka Within Nippon Sheet Glass Co., Ltd.
Claims (3)
ガラスが合流してガラス板となる下端部と、前記頂部か
らの溶融ガラスが分流して前記下端部の方向へ流下する
中央部と該中央部に隣接する２つの側縁部とから成り前
記下端部において近接した幅広の表裏面と、前記表裏面
に隣接する２つの端面とを有する耐火性の本体と、 前記本体の全表面を覆う白金または白金合金板の被覆
と、を備え、 前記中央部、側縁部及び端面のそれぞれの部分の被覆の
厚さを次のうちのいずれかとしたことを特徴とするガラ
ス板製造用成形体。 （ａ）中央部の被覆を端面及び側縁部の被覆より厚くす
る。 （ｂ）中央部の被覆を端面の被覆より厚くし、かつ側縁
部の被覆を中央部と同じ厚さにする。 （ｃ）中央部の被覆を端面の被覆と同じ厚さにし、かつ
中央部の被覆を側縁部の被覆より厚くする。1. A top portion to which molten glass is supplied, a lower end portion where the molten glass joins to form a glass plate, and a central portion where the molten glass from the top portion is branched and flows down toward the lower end portion. A refractory body having a wide front and back surface composed of two side edge portions adjacent to the central portion and being close to each other at the lower end portion, and two end surfaces adjacent to the front and back surfaces, and a whole surface of the main body. And a coating of a platinum or platinum alloy plate to cover the molded body for producing a glass plate, characterized in that the thickness of the coating on each of the central portion, the side edge portion and the end surface is one of the following. .. (A) The coating of the central portion is made thicker than the coating of the end faces and the side edge portions. (B) The coating of the central portion is made thicker than the coating of the end face, and the coating of the side edge portion is made the same thickness as the central portion. (C) The coating of the central portion has the same thickness as the coating of the end surface, and the coating of the central portion is thicker than the coating of the side edge portions.
ガラスが合流してガラス板となる下端部と、前記頂部か
らの溶融ガラスが分流して前記下端部の方向へ流下する
中央部と該中央部に隣接する２つの側縁部とから成り前
記下端部において近接した幅広の表裏面と、前記表裏面
に隣接する２つの端面とを有する耐火性の本体と、 前記本体の全表面を覆う白金または白金合金板の被覆
と、を備えるガラス板製造用成形体であって、 前記下端部において前記成形体の幅方向に亘って形成さ
れ、該下端部における前記被覆の垂直方向の厚さより大
きい高さの白金または白金合金材の中実体と、を備える
ことを特徴とするガラス板製造用成形体。2. A top portion to which molten glass is supplied, a lower end portion where the molten glass joins to form a glass plate, and a central portion where the molten glass from the top portion is branched and flows down toward the lower end portion. A refractory body having a wide front and back surface composed of two side edge portions adjacent to the central portion and being close to each other at the lower end portion, and two end surfaces adjacent to the front and back surfaces, and a whole surface of the main body. A coating of a platinum or platinum alloy plate covering, which is a molded product for glass plate production, wherein the lower end is formed over the width direction of the molded product, and the vertical thickness of the coating at the lower end is A molded body for glass plate production, comprising: a solid body of platinum or a platinum alloy material having a large height.
ガラスが合流してガラス板となる下端部と、前記頂部か
らの溶融ガラスが分流して前記下端部の方向へ流下する
中央部と該中央部に隣接する２つの側縁部とから成り前
記下端部において近接した幅広の表裏面と、前記表裏面
に隣接する２つの端面とを有する耐火性の本体と、 前記本体の全表面を覆う白金または白金合金板の被覆
と、 前記被覆と前記本体との間を負圧により吸引する吸引手
段と、を備えることを特徴とするガラス板製造用成形
体。3. A top portion to which molten glass is supplied, a lower end portion where the molten glass joins to form a glass plate, and a central portion where the molten glass from the top portion is branched and flows down toward the lower end portion. A refractory body having a wide front and back surface composed of two side edge portions adjacent to the central portion and being close to each other at the lower end portion, and two end surfaces adjacent to the front and back surfaces, and a whole surface of the main body. A molded body for producing a glass plate, comprising: a coating of platinum or a platinum alloy plate for covering; and a suction means for sucking between the coating and the main body by negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3300696A JP2602382B2 (en) | 1991-11-15 | 1991-11-15 | Molded body for glass sheet production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3300696A JP2602382B2 (en) | 1991-11-15 | 1991-11-15 | Molded body for glass sheet production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05139766A true JPH05139766A (en) | 1993-06-08 |
| JP2602382B2 JP2602382B2 (en) | 1997-04-23 |
Family
ID=17887982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3300696A Expired - Lifetime JP2602382B2 (en) | 1991-11-15 | 1991-11-15 | Molded body for glass sheet production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602382B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10305141A1 (en) * | 2003-02-08 | 2004-08-19 | Eglass Platinum Technology Gmbh | Device for preparation of thin flat glass consisting of a hollow body of contracted lower cross-section and a devitrification prevention heat source useful for production of Flat-Panel-Displays or storage medium plates |
| JP2007112684A (en) * | 2005-10-24 | 2007-05-10 | Nippon Electric Glass Co Ltd | Molded refractory article mounted to manufacturing device for plate glass and forming method for glass plate |
| JP2008069024A (en) * | 2006-09-13 | 2008-03-27 | Tanaka Kikinzoku Kogyo Kk | Method of manufacturing sheet glass by fusion down draw method |
| JP2009518275A (en) * | 2005-12-08 | 2009-05-07 | コーニング インコーポレイテッド | Method and apparatus for pulling low liquidus viscosity glass |
| WO2009070230A1 (en) * | 2007-11-29 | 2009-06-04 | Corning Incorporated | Creep resistant multiple layer refractory used in a glass manufacturing system |
| WO2012114842A1 (en) * | 2011-02-22 | 2012-08-30 | 日本電気硝子株式会社 | Device for manufacturing sheet glass, and method for manufacturing sheet glass |
| CN102906034A (en) * | 2010-05-28 | 2013-01-30 | 康宁股份有限公司 | Composite isopipe |
| WO2014030649A1 (en) * | 2012-08-24 | 2014-02-27 | 日本電気硝子株式会社 | Device for manufacturing sheet glass, and method for manufacturing sheet glass |
| JP2015048278A (en) * | 2013-09-02 | 2015-03-16 | 日本電気硝子株式会社 | Sheet glass molding, production method of sheet glass molding, production device of sheet glass, and production method of sheet glass |
-
1991
- 1991-11-15 JP JP3300696A patent/JP2602382B2/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10305141A1 (en) * | 2003-02-08 | 2004-08-19 | Eglass Platinum Technology Gmbh | Device for preparation of thin flat glass consisting of a hollow body of contracted lower cross-section and a devitrification prevention heat source useful for production of Flat-Panel-Displays or storage medium plates |
| JP2007112684A (en) * | 2005-10-24 | 2007-05-10 | Nippon Electric Glass Co Ltd | Molded refractory article mounted to manufacturing device for plate glass and forming method for glass plate |
| JP2009518275A (en) * | 2005-12-08 | 2009-05-07 | コーニング インコーポレイテッド | Method and apparatus for pulling low liquidus viscosity glass |
| JP2008069024A (en) * | 2006-09-13 | 2008-03-27 | Tanaka Kikinzoku Kogyo Kk | Method of manufacturing sheet glass by fusion down draw method |
| WO2009070230A1 (en) * | 2007-11-29 | 2009-06-04 | Corning Incorporated | Creep resistant multiple layer refractory used in a glass manufacturing system |
| JP2011505319A (en) * | 2007-11-29 | 2011-02-24 | コーニング インコーポレイテッド | Fire resistant creep resistant multilayers used in glass manufacturing systems |
| EP2576463A2 (en) * | 2010-05-28 | 2013-04-10 | Corning Incorporated | Composite isopipe |
| CN102906034A (en) * | 2010-05-28 | 2013-01-30 | 康宁股份有限公司 | Composite isopipe |
| JP2013527121A (en) * | 2010-05-28 | 2013-06-27 | コーニング インコーポレイテッド | Composite isopipe |
| EP2576463A4 (en) * | 2010-05-28 | 2013-11-13 | Corning Inc | Composite isopipe |
| US9038415B2 (en) | 2010-05-28 | 2015-05-26 | Corning Incorporated | Composite isopipe |
| US9676648B2 (en) | 2010-05-28 | 2017-06-13 | Corning Incorporated | Composite isopipe |
| WO2012114842A1 (en) * | 2011-02-22 | 2012-08-30 | 日本電気硝子株式会社 | Device for manufacturing sheet glass, and method for manufacturing sheet glass |
| WO2014030649A1 (en) * | 2012-08-24 | 2014-02-27 | 日本電気硝子株式会社 | Device for manufacturing sheet glass, and method for manufacturing sheet glass |
| JPWO2014030649A1 (en) * | 2012-08-24 | 2016-07-28 | 日本電気硝子株式会社 | Sheet glass manufacturing apparatus and sheet glass manufacturing method |
| US10570046B2 (en) | 2012-08-24 | 2020-02-25 | Nippon Electric Glass Co., Ltd. | Method of manufacturing glass sheet |
| JP2015048278A (en) * | 2013-09-02 | 2015-03-16 | 日本電気硝子株式会社 | Sheet glass molding, production method of sheet glass molding, production device of sheet glass, and production method of sheet glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2602382B2 (en) | 1997-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3335291B2 (en) | Method and apparatus for manufacturing glass plate | |
| JP3093000B2 (en) | Glass plate manufacturing equipment | |
| KR101329867B1 (en) | Process and device for manufacturing flat sheets of a glass-based material | |
| EP0019353B1 (en) | Method and apparatus for forming laminated sheet glass | |
| TWI458689B (en) | Method and apparatus for producing glass sheet | |
| JP2602382B2 (en) | Molded body for glass sheet production | |
| JP2023030089A (en) | Glass article capable of suppressing variation in thickness, method for manufacturing the same, and apparatus therefor | |
| US4360373A (en) | Method of and apparatus for controlling erosion of a refractory threshold | |
| US7007511B2 (en) | Device for supporting a ribbon of glass | |
| JP2007191319A (en) | Method for production of glass formed product | |
| JPH06256031A (en) | Method and device for press bending of plate glass | |
| JP2002096370A (en) | Mouthpiece, sheet, and apparatus and method for manufacturing the sheet | |
| JPS5946894B2 (en) | Sheet or ribbon glass manufacturing equipment | |
| TW201418172A (en) | Manufacturing device and manufacturing method of glass plate | |
| TW201636306A (en) | System for forming a glass article | |
| JP2572444B2 (en) | Glass plate manufacturing equipment | |
| JP4277118B2 (en) | Method and apparatus for manufacturing thin glass | |
| JP4280977B2 (en) | Sheet glass forming equipment | |
| US3503728A (en) | Float glass tank with replaceable bottom wall means | |
| JP2604080B2 (en) | Glass plate manufacturing equipment | |
| US3473911A (en) | Adjustable orifice apparatus for forming glass films | |
| TW202142504A (en) | Methods and apparatus for manufacturing a glass ribbon | |
| US4091156A (en) | Manufactured glass by contiguous float process | |
| US20090235693A1 (en) | Manufacturing Method of Plate Glass | |
| JP2614803B2 (en) | Sheet glass forming equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961119 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090129 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090129 Year of fee payment: 12 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090129 Year of fee payment: 12 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090129 Year of fee payment: 12 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090129 Year of fee payment: 12 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100129 Year of fee payment: 13 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100129 Year of fee payment: 13 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100129 Year of fee payment: 13 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100129 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110129 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120129 Year of fee payment: 15 |
|
| EXPY | Cancellation because of completion of term |