JP2007153713A - Glass manufacturing unit - Google Patents

Glass manufacturing unit Download PDF

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JP2007153713A
JP2007153713A JP2005354627A JP2005354627A JP2007153713A JP 2007153713 A JP2007153713 A JP 2007153713A JP 2005354627 A JP2005354627 A JP 2005354627A JP 2005354627 A JP2005354627 A JP 2005354627A JP 2007153713 A JP2007153713 A JP 2007153713A
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glass
platinum
molten glass
contact
brick
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Noriaki Hara
範明 原
Yasunori Gama
保典 蒲
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Tanaka Kikinzoku Kogyo KK
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Tanaka Kikinzoku Kogyo KK
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
    • 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

<P>PROBLEM TO BE SOLVED: To provide various units used for glass manufacturing processes which are hardly abraded by molten glass and capable of stably supplied. <P>SOLUTION: Disclosed units are a melter, a refiner, a throat, a forehearth, a feeder and a fusion cell which are used in glass manufacturing processes and brought into contact with molten glass, and each equipped with a thermally sprayed coating film of platinum or platinum alloy formed on a core material of sintered brick. For example, the melter 10, the refiner 20 and the throat 50 are manufactured by combining blocks 11, 21 and 51 comprising sintered bricks formed into prescribed forms, respectively. In these embodiments, contact faces 12, 22, 52 of these blocks with molten glass and mating faces 13, 23, 53 of the neighboring blocks are each formed of a platinum thermally sprayed coating film. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ガラス製造工程で使用される各種装置（溶解槽、清澄槽、スロート、フィーダー、フュージョンセル）に関する。詳しくは、浸食・摩耗による溶融ガラスの汚染が従来品より抑制されており、高品質のガラス製品を製造することができるものに関する。   The present invention relates to various apparatuses (dissolution tank, clarification tank, throat, feeder, fusion cell) used in the glass production process. Specifically, the present invention relates to a product capable of producing a high-quality glass product in which contamination of molten glass due to erosion / wear is suppressed compared to conventional products.

光学ガラス、ガラス建材等の各種のガラスの製造においては、ガラス原料（カレット）を高温で溶解し、製造された溶融ガラスを清澄し均質化した後に成形して製品としている。そして、ガラス製造装置において高温の溶融ガラスと接する、ガラス溶解槽、清澄槽等の槽類や、各槽間のガラスの流通、供給を担うスロート、フィーダーといった機器を構成する材料には、溶融ガラスを汚染することがないような安定性、強度が要求される。また、近年、板ガラスの成形工程として、オーバーフロー法が用いられている。この方法は、溶解したガラスを樋状の成形体（フュージョンセル）の上部から溢れさせて成形する方法であり、ガラス表面が成形部材と全く接触しないため高品位の表面が得られるというメリットがある。この成形工程で使用するフュージョンセルの材料でも同様の高温安定性、強度が要求される。   In the production of various types of glass such as optical glass and glass building materials, glass raw materials (cullet) are melted at a high temperature, the produced molten glass is refined and homogenized, and then molded into products. And in the glass manufacturing apparatus, molten glass, materials such as glass melting tanks, clarification tanks, etc., and throats and feeders that are responsible for the distribution and supply of glass between the tanks are used for molten glass. Stability and strength are required so as not to contaminate. In recent years, an overflow method has been used as a sheet glass forming step. This method is a method in which melted glass is formed by overflowing from the upper part of a bowl-shaped molded body (fusion cell), and has a merit that a high-quality surface can be obtained because the glass surface does not contact the molded member at all. . The same high temperature stability and strength are required for the material of the fusion cell used in this molding process.

従来からこれら溶解槽、清澄槽、スロート、フィーダー、フュージョンセルの構成材料は、電鋳煉瓦と称される耐火物材料が用いられている。電鋳煉瓦とは、電気溶融鋳造（電鋳）により製造される煉瓦であり、電気炉にて溶融したレンガ原料（Ａｌ2 Ｏ3 −ＺｒＯ2 −ＳｉＯ2 質セラミックやＡｌ2 Ｏ3 −ＳｉＯ2 質セラミック等）を鋳型に流し込んで冷却させたものである。電鋳煉瓦は、緻密で硬度が高いことから、高温の溶融ガラスを取り扱うのに好適である。
特開平０５−８２１０号公報 Conventionally, a refractory material called an electroformed brick is used as a constituent material of these dissolution tanks, clarification tanks, throats, feeders, and fusion cells. An electrocast brick is a brick manufactured by electromelting casting (electroforming), and is a brick material (Al 2 O 3 —ZrO 2 —SiO 2 quality ceramic or Al 2 O 3 —SiO 2 ) melted in an electric furnace. Quality ceramic) is poured into a mold and cooled. Electroformed brick is dense and has high hardness, and is suitable for handling high-temperature molten glass.
Japanese Patent Laid-Open No. 05-8210

しかしながら、電鋳煉瓦でも溶融ガラスによる侵食が全く生じないとはいえず、長時間の使用による摩耗は回避できない。そして、煉瓦素材の摩耗は溶融ガラスを汚染し、製品の品質を低下させるおそれがある。また、電鋳煉瓦は、現在、需要が増大しており、その供給が不安定となっているが、このような供給が安定しない材料を用いるのは装置のコストに影響を与える。   However, electrocast bricks cannot be said to be eroded at all by molten glass, and wear due to prolonged use cannot be avoided. And the wear of the brick material may contaminate the molten glass and reduce the quality of the product. In addition, the demand for electrocast bricks is currently increasing, and the supply thereof is unstable. However, the use of such a material with unstable supply affects the cost of the apparatus.

そこで、本発明は、電鋳煉瓦に替わる材料を用いた溶解槽、清澄槽、スロート、フィーダー、フュージョンセルであって、高温の溶融ガラスによる摩耗が少なく、また、安定的な供給が可能なものを提供することを目的とする。   Therefore, the present invention is a melting tank, a clarification tank, a throat, a feeder, and a fusion cell using a material that replaces an electroformed brick, which is less likely to wear due to high-temperature molten glass and can be stably supplied. The purpose is to provide.

本発明者等は、上記課題を解決すべく検討を行い、従来用いられていた電鋳煉瓦に対して焼結煉瓦を用いることを検討した。焼結煉瓦とは、セラミック原料と適宜の結合材とを混練し成形した後、焼成することによって得られる煉瓦材料であり、電鋳煉瓦よりも緻密性には欠けるが、高温での強度においては十分なものがある。そして、本発明者等は、焼結煉瓦の緻密性の不足による摩耗の問題を解決するため、焼結煉瓦を芯材とし、これに溶射により白金膜を形成した各種装置を見出し本発明に想到した。   The inventors of the present invention have studied to solve the above-described problems, and have studied to use sintered bricks for electrocast bricks that have been conventionally used. Sintered brick is a brick material obtained by kneading and forming a ceramic raw material and an appropriate binder and then firing, and it lacks denser than electroformed brick, but at high temperature strength There is enough. In order to solve the problem of wear due to lack of denseness of the sintered brick, the present inventors have found various apparatuses in which the sintered brick is used as a core material and a platinum film is formed thereon by thermal spraying, and the present inventors have conceived the present invention. did.

即ち、本発明は、ガラス製造工程で用いられ、溶融ガラスと接触する溶解槽、清澄槽、スロート、フォアハース、フィーダー、フュージョンセルにおいて、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなるものである。   That is, the present invention is used in a glass manufacturing process, and in a melting tank, a clarification tank, a throat, a foreher, a feeder, and a fusion cell that are in contact with molten glass, a sprayed film made of platinum or a platinum alloy on a core made of sintered brick Is formed.

本発明において、焼結煉瓦とは、上記のようにして製造されるものであるが、具体的な物性は、アルミナ、シリカ、ジルコニアを主成分とする耐熱温度１０００℃以上の耐熱煉瓦であって、見掛気孔率５〜５０％の耐火物煉瓦である。この点、従来、ガラス製造分野で用いられてきた電鋳煉瓦は、見掛気孔率が２％以下のものが主であり、両者は明確に区別されるものである。   In the present invention, the sintered brick is manufactured as described above, and specific physical properties are heat-resistant bricks having a heat-resistant temperature of 1000 ° C. or more mainly composed of alumina, silica, and zirconia. This is a refractory brick having an apparent porosity of 5 to 50%. In this regard, electrocast bricks conventionally used in the field of glass production are mainly those having an apparent porosity of 2% or less, and both are clearly distinguished.

そして、本発明において各装置に施す溶射膜の厚さは、１００〜１０００μｍとするのが好ましい。これは、１００μｍ未満の膜厚では、溶融ガラスの焼結煉瓦への侵入を防ぐことが困難となるからである。また、膜厚が１０００μｍを超えても効果には差が生じず、溶射時の溶射膜が収縮する際に剥離が生じやすくなるからである。溶射膜を形成する溶射法は、特に制限されるものはなく、フレーム溶射、プラズマ溶射などが知られているが、何れも適用できる。尚、本発明においては、焼結煉瓦からなる芯材に直接、溶射膜を形成しても良いが、芯材上に適宜の中間層を形成し、その上に溶射膜を形成しても良い。また、溶射膜は白金の他に白金合金、例えば、白金−ロジウム合金、白金−イリジウム合金、白金−金合金からなる。白金合金については、白金より硬度等の特性に優れるものがあり、ガラス製造装置の部位によっては適用が好ましい場合がある。   And in this invention, it is preferable that the thickness of the thermal spray film | membrane applied to each apparatus shall be 100-1000 micrometers. This is because it is difficult to prevent the molten glass from entering the sintered brick at a film thickness of less than 100 μm. Further, even if the film thickness exceeds 1000 μm, there is no difference in effect, and peeling tends to occur when the sprayed film shrinks during spraying. The thermal spraying method for forming the thermal spray film is not particularly limited, and flame spraying, plasma spraying, and the like are known, but any of them can be applied. In the present invention, the sprayed film may be formed directly on the core material made of sintered brick, but an appropriate intermediate layer may be formed on the core material, and the sprayed film may be formed thereon. . In addition to platinum, the sprayed film is made of a platinum alloy such as a platinum-rhodium alloy, a platinum-iridium alloy, or a platinum-gold alloy. Some platinum alloys are more excellent in properties such as hardness than platinum, and application may be preferable depending on the part of the glass manufacturing apparatus.

焼結煉瓦の上に形成された溶射膜は、その表面が鏡面処理されたものが好ましい。高温の溶融ガラスと白金との界面で泡の発生を抑制し、成形するガラスの形状を安定させるためである。この鏡面処理は、予定厚さより厚く溶射膜を形成し、これを物理的に研磨するの方法で行なわれる。   The thermal spray film formed on the sintered brick preferably has a mirror-finished surface. This is to suppress the generation of bubbles at the interface between the high-temperature molten glass and platinum and stabilize the shape of the glass to be molded. This mirror surface treatment is performed by a method of forming a sprayed film thicker than a predetermined thickness and physically polishing it.

以上説明したように、本発明に係る溶解槽、清澄槽、スロート、フィーダー、フュージョンセルは、表面の白金溶射膜により耐摩耗性が向上され、溶融ガラス中での長期使用にあっても摩耗が低減されており、溶融ガラスの汚染も少ない。そして、本発明では、その構成材料として入手が比較的に容易な焼結煉瓦を用い、装置の安定的供給を可能とする。   As described above, the dissolution tank, clarification tank, throat, feeder, and fusion cell according to the present invention have improved wear resistance due to the platinum sprayed film on the surface, and wear even during long-term use in molten glass. It is reduced and there is little contamination of the molten glass. And in this invention, the stable supply of an apparatus is enabled using the sintered brick which is comparatively easy to obtain as the constituent material.

以下、本発明の実施形態について説明する。図１は、ガラス製造設備の構成の概略を示す図である。このガラス製造設備は、ガラス原料を溶解し溶融ガラスの供給源となる溶解槽１０と、溶解槽１０の下流に設けられる清澄槽２０、それらの下流側に設けられた攪拌槽３０、フュージョンセル４０から構成される。そして、溶解用１０と清澄槽２０との間には、溶解槽１０内の溶融ガラス上層の不均一層の流出を遮るための幅狭の通路であるスロート５０が連結されている。また、攪拌槽から成形装置へ溶解ガラスを供給するためのフォアハース６０が設置されている。   Hereinafter, embodiments of the present invention will be described. FIG. 1 is a diagram showing an outline of the configuration of a glass manufacturing facility. This glass production facility includes a melting tank 10 that melts a glass raw material and serves as a supply source of molten glass, a clarification tank 20 provided downstream of the melting tank 10, a stirring tank 30 provided downstream thereof, and a fusion cell 40. Consists of A throat 50, which is a narrow passage for blocking the outflow of the heterogeneous layer on the molten glass upper layer in the melting tank 10, is connected between the melting 10 and the clarification tank 20. Further, a forehearth 60 is provided for supplying molten glass from the stirring tank to the molding apparatus.

図２は、溶解槽１０、清澄槽２０、及び、スロート５０を示す。これらの装置は、所定の形状に成形された焼結煉瓦（商品名：Ｍ３９０、東芝セラミックス社製）からなるブロック１１、２１、５１を組合わせて製造される。本実施形態では、これらのブロックについて、溶融ガラスとの接触面１２、２２、５２及び隣接するブロックの合わせ面１３、２３、５３について白金溶射膜が形成されている。白金溶射膜は、ブロック表面に溶射膜の密着性向上のための中間層を形成した後、フレーム溶射法にて形成した。膜厚は、溶融ガラス接触面１２、２２、５２について４００μｍ、ブロックの合わせ面１３、２３、５３について２００μｍとしている。   FIG. 2 shows the dissolution tank 10, the clarification tank 20, and the throat 50. These devices are manufactured by combining blocks 11, 21, and 51 made of sintered brick (trade name: M390, manufactured by Toshiba Ceramics) formed into a predetermined shape. In this embodiment, a platinum sprayed film is formed on the contact surfaces 12, 22, 52 with the molten glass and the mating surfaces 13, 23, 53 of the adjacent blocks for these blocks. The platinum sprayed film was formed by flame spraying after an intermediate layer for improving the adhesion of the sprayed film was formed on the block surface. The film thickness is 400 μm for the molten glass contact surfaces 12, 22, 52, and 200 μm for the mating surfaces 13, 23, 53 of the blocks.

図３は、フォアハース６０を示す。このフォアハース６０は、焼結煉瓦（商品名：Ｍ３１５、東芝セラミックス社製）からなるチャンネルブロック６１を複数連結して製造される。本実施形態では、各チャンネルブロックについて、溶融ガラスとの接触面６２、及び、隣接するチャンネルブロックの合わせ面６３について白金溶射膜が形成されている。フレーム溶射法及び溝内についてプラズマ溶射法を用い、白金溶射膜を焼結煉瓦に直接形成した。膜厚は、溶融ガラス接触面６２について４００μｍ、ブロックの合わせ面６３について２００μｍとしている。   FIG. 3 shows the forehouse 60. The forehearth 60 is manufactured by connecting a plurality of channel blocks 61 made of sintered brick (trade name: M315, manufactured by Toshiba Ceramics). In this embodiment, for each channel block, a platinum sprayed film is formed on the contact surface 62 with the molten glass and the mating surface 63 of the adjacent channel block. The flame spraying method and the plasma spraying method for the inside of the groove were used to directly form a platinum sprayed film on the sintered brick. The film thickness is 400 μm for the molten glass contact surface 62 and 200 μm for the block mating surface 63.

また、このフォアハース６０は、スターラーによる溶融ガラスの攪拌部を備える。このガラス攪拌部には、焼結煉瓦（商品名：Ｍ３９０、東芝セラミックス社製）からなるチャンネルブロックの底部と側壁に中間層を形成した後、白金よりも高硬度で耐摩耗性に優れる白金−１０％ロジウム合金からなる溶射膜を形成した。溶射膜は、フレーム溶射法にて、溶融ガラス接触面について３５０μｍ、ブロックの合わせ面について２００μｍ形成した。   In addition, the forehearth 60 includes a stirrer for molten glass. In this glass stirring part, an intermediate layer is formed on the bottom and side walls of a channel block made of sintered brick (trade name: M390, manufactured by Toshiba Ceramics), and then a platinum having higher hardness and higher wear resistance than platinum. A sprayed film made of a 10% rhodium alloy was formed. The sprayed coating was formed by a flame spraying method with a molten glass contact surface of 350 μm and a block mating surface of 200 μm.

図４は、フュージョンセル４０を示す。フュージョンセル４０は、その各部材を焼結煉瓦（商品名：Ｍ３９０、東芝セラミックス社製）を成形加工して接合して製造される。そして、製造後、溶融ガラスとの接触面について白金溶射膜が形成されている。白金溶射膜は、ブロック表面に中間層を形成した後、フレーム溶射法にて形成した。溶射膜の厚さは、溶融ガラスが直接接触するセルの内外面４２については３５０μｍとし、溶融ガラスの接触のないフォアハースとの接合部４３を２００μｍとした。また、セル外壁の傾斜部分４４については、溶射膜厚を５００μｍとし、その後研磨を行い表面を平滑化処理している。   FIG. 4 shows the fusion cell 40. The fusion cell 40 is manufactured by forming and bonding sintered bricks (trade name: M390, manufactured by Toshiba Ceramics) of the respective members. And after manufacture, the platinum sprayed film is formed about the contact surface with molten glass. The platinum sprayed film was formed by flame spraying after forming an intermediate layer on the block surface. The thickness of the sprayed film was 350 μm for the inner and outer surfaces 42 of the cell with which the molten glass was in direct contact, and the joint 43 with Fore Haas without contact with the molten glass was 200 μm. Further, the inclined portion 44 of the cell outer wall has a sprayed film thickness of 500 μm and is then polished to smooth the surface.

以上のガラス製造設備を用いたガラス製造の方法については、従来と変わる点はない。即ち、目的組成に調合されたガラス原料を溶解槽１０に投入し、加熱して溶融ガラス化する。溶融ガラスは、スロート５０を通って清澄槽２０へ導入され、清澄剤を導入して溶解槽での反応時に発生した泡を除去する。そして、清澄された溶融ガラスを攪拌槽３０へ導入し。スターラーで溶融ガラスを均質化する。このようにして、清澄、均質化された溶融ガラスをフォアハースを通過させてフュージョンセル４０に供給し成形してガラス製品が製造される。   About the method of glass manufacture using the above glass manufacturing equipment, there is no point different from the past. That is, the glass raw material prepared to the target composition is put into the melting tank 10 and heated to be melted into glass. The molten glass is introduced into the clarification tank 20 through the throat 50, and a clarifier is introduced to remove bubbles generated during the reaction in the dissolution tank. Then, the clarified molten glass is introduced into the stirring tank 30. Homogenize the molten glass with a stirrer. In this way, the clarified and homogenized molten glass is supplied to the fusion cell 40 through the forehearth and molded to produce a glass product.

本実施形態に係るガラス製造装置にて１年間の連続的にガラス製造を行なったところ、白金溶射膜により保護された面には摩耗による変形も見られず清浄な面を呈していた。この点、従来の電鋳煉瓦（例えば、サンゴバン社製の商品名ＣＺ、ＣＳ）を使用する同様の構成のガラス製造装置の使用後の状態と比較すると、従来品では摩耗・変形が見られており、白金溶射膜による効果が確認できた。   When glass was continuously manufactured for one year by the glass manufacturing apparatus according to the present embodiment, the surface protected by the platinum sprayed film was not deformed by wear and exhibited a clean surface. In this respect, compared with the state after use of a glass manufacturing apparatus having a similar configuration using conventional electrocast bricks (for example, trade names CZ and CS manufactured by Saint-Gobain), the conventional products show wear and deformation. The effect of the platinum sprayed film was confirmed.

ガラス製造装置の概略図Schematic diagram of glass manufacturing equipment 本実施形態で使用したガラス溶解槽、清澄層、スロートの外観図。The external view of the glass dissolution tank, clarification layer, and throat which were used in this embodiment. 本実施形態で使用したフォアハースの外観図。FIG. 3 is an external view of a foreground used in the present embodiment. 本実施形態で使用したフュージョンセルの外観図。The external view of the fusion cell used in this embodiment.

Claims (5)

ガラス製造工程で用いられ、溶融ガラスと接触するガラス溶解用スロートにおいて、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなるガラス溶解用スロート。 A glass melting throat that is used in a glass manufacturing process and is in contact with molten glass, wherein a sprayed film made of platinum or a platinum alloy is formed on a core made of sintered brick. ガラス製造工程で用いられ、溶融ガラスと接触するガラス溶解槽において、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなるガラス溶解槽。 A glass melting tank in which a thermal spray film made of platinum or a platinum alloy is formed on a core material made of sintered brick in a glass melting tank used in a glass manufacturing process and in contact with molten glass. ガラス製造工程で用いられ、溶融ガラスと接触するガラス清澄槽において、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなる清澄槽。 In a glass clarification tank used in a glass production process and in contact with molten glass, a clarification tank in which a thermal spray film made of platinum or a platinum alloy is formed on a core material made of sintered brick. ガラス製造工程で用いられ、溶融ガラスと接触するフィーダー又はフォアハースにおいて、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなるフィーダー又はフォアハース。 In a feeder or fore-hearth that is used in a glass manufacturing process and is in contact with molten glass, a feeder or fore-hearth in which a thermal spray film made of platinum or a platinum alloy is formed on a core made of sintered brick. ガラス製造工程で用いられ、溶融ガラスと接触するフージョンセルにおいて、焼結煉瓦からなる芯材に白金又は白金合金からなる溶射膜が形成されてなるフュージョンセル。
A fusion cell, which is used in a glass manufacturing process and is in contact with molten glass, wherein a thermal spray film made of platinum or a platinum alloy is formed on a core made of sintered brick.
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WO2012091130A1 (en) * 2010-12-28 2012-07-05 旭硝子株式会社 Clarification tank, glass melting furnace, molten glass production method, glassware production method and glassware production device
JP2013534895A (en) * 2010-06-21 2013-09-09 サン−ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン Refractory block and glass furnace
WO2021005934A1 (en) * 2019-07-05 2021-01-14 日本電気硝子株式会社 Glass article production apparatus
WO2022209393A1 (en) * 2021-03-31 2022-10-06 Ａｇｃ株式会社 Member applied to part in contact with molten glass and manufacturing method of member

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JP2000086249A (en) * 1998-09-07 2000-03-28 Asahi Glass Co Ltd Vacuum defoaming device for molten glass

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JPH10195623A (en) * 1996-12-27 1998-07-28 Nippon Electric Glass Co Ltd Platinum-coating refractory
JP2000086249A (en) * 1998-09-07 2000-03-28 Asahi Glass Co Ltd Vacuum defoaming device for molten glass

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013534895A (en) * 2010-06-21 2013-09-09 サン−ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン Refractory block and glass furnace
WO2012091130A1 (en) * 2010-12-28 2012-07-05 旭硝子株式会社 Clarification tank, glass melting furnace, molten glass production method, glassware production method and glassware production device
WO2021005934A1 (en) * 2019-07-05 2021-01-14 日本電気硝子株式会社 Glass article production apparatus
JP2021011404A (en) * 2019-07-05 2021-02-04 日本電気硝子株式会社 Device for producing glass article
JP7358806B2 (en) 2019-07-05 2023-10-11 日本電気硝子株式会社 Glass article manufacturing equipment
WO2022209393A1 (en) * 2021-03-31 2022-10-06 Ａｇｃ株式会社 Member applied to part in contact with molten glass and manufacturing method of member

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