WO2019230488A1 - Glass article production method - Google Patents

Glass article production method Download PDF

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Publication number
WO2019230488A1
WO2019230488A1 PCT/JP2019/020021 JP2019020021W WO2019230488A1 WO 2019230488 A1 WO2019230488 A1 WO 2019230488A1 JP 2019020021 W JP2019020021 W JP 2019020021W WO 2019230488 A1 WO2019230488 A1 WO 2019230488A1
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WIPO (PCT)
Prior art keywords
molten glass
tubular portion
tubular
glass
gas
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PCT/JP2019/020021
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French (fr)
Japanese (ja)
Inventor
克利 藤原
周作 玉村
裕之 板津
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日本電気硝子株式会社
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2019230488A1 publication Critical patent/WO2019230488A1/en

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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
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/182—Stirring devices; Homogenisation by moving the molten glass along fixed elements, e.g. deflectors, weirs, baffle plates
    • 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
    • C03B5/225—Refining

Definitions

  • the present invention relates to a method for producing a glass article using a clarification container composed of platinum or a platinum alloy.
  • plate glass is used as a substrate for flat panel displays such as liquid crystal displays and organic EL displays.
  • the material of the plate glass for the substrate alkali-free glass that does not impair the thin film characteristics such as amorphous silicon and polycrystalline silicon is preferably used.
  • Glass articles such as plate glass are manufactured through various processes such as a melting process, a clarification process, a homogenization process, and a molding process.
  • molten glass is passed while being heated in a state in which a gas phase space is formed in a tubular clarification container composed of platinum or a platinum alloy.
  • a vent part is provided for communicating with the gas phase space in the clarification container and for discharging the gas in the gas phase space to the outside.
  • annular reinforcing member may be disposed on the inner surface of the clarification container along the circumferential direction.
  • the present invention has been made in view of the above circumstances, and can perform a defoaming treatment of molten glass, and can prevent the volatilized platinum or platinum alloy from solidifying and mixing into the molten glass. It is a technical problem to provide a manufacturing method.
  • the present invention is for solving the above-mentioned problems, and a melting step of melting a glass raw material in a melting tank to produce a molten glass, and passing the molten glass through a clarification container composed of platinum or a platinum alloy. And a forming step of forming the molten glass that has undergone the refining step as a glass article by a forming apparatus, wherein the refining container is a method for forming the molten glass.
  • a tubular portion that is transported from upstream to downstream; a vent portion that is provided at an upper portion of the tubular portion and that discharges gas generated in the molten glass; and a reinforcing member that is disposed on an inner surface of the tubular portion,
  • the reinforcing member includes a main body portion extending along a circumferential direction of the tubular portion, and a missing portion located at an upper portion of the tubular portion, and in the refining step, the molten glass is applied to the tubular portion.
  • the reinforcing member includes the missing portion positioned at the upper portion of the tubular portion, so that the gas that has reached the upper portion of the tubular portion passes through the missing portion and is discharged from the vent portion.
  • the main body portion is disposed except for an upper portion of the tubular portion, and the missing portion is constituted by a portion where the main body portion is not disposed.
  • the clarification container further includes a partition plate disposed on an inner surface of the tubular portion for stirring the molten glass, and the partition plate is located at an upper portion of the tubular portion and the tubular portion. It is preferable to provide the 1st opening part which lets the gas which reached
  • attained the upper part of a tubular part can be passed through a 1st opening part, and can be discharged
  • the first opening is preferably in contact with the inner surface of the tubular portion.
  • the molten glass is filled with the molten glass by positioning the liquid surface of the molten glass in the melting tank above the top of the inner surface of the tubular portion.
  • the clarification process can be executed without reliably forming a gas phase space between the inner surface of the tubular portion and the molten glass.
  • the defoaming treatment of the molten glass can be performed satisfactorily, and volatilized platinum or platinum alloy can be prevented from solidifying and mixing into the molten glass.
  • FIG. 1 to 4 show a first embodiment of the method for producing a glass article of the present invention.
  • the manufacturing apparatus 10 of the glass article which concerns on this embodiment is the dissolution tank 11, the clarification container 12, the homogenization tank (stirring tank) 13, and the state adjustment tank 14 in an order from the upstream.
  • the molding apparatus 15 and glass supply paths 16a to 16d for connecting them are provided.
  • the melting tank 11 is a container for performing a melting step of melting molten glass Gm to obtain molten glass Gm.
  • the dissolution tank 11 is connected to the clarification container 12 by a glass supply path 16a.
  • the clarification container 12 is a container for performing a clarification process in which the molten glass Gm supplied from the dissolution tank 11 is defoamed by the action of a clarifier or the like.
  • the clarification container 12 is connected to the homogenization tank 13 by a glass supply path 16b.
  • the homogenization tank 13 is a container for performing a homogenization process in which the clarified molten glass Gm is stirred with a stirring blade or the like to make it uniform.
  • the homogenization tank 13 is connected to the state adjustment tank 14 by a glass supply path 16c.
  • the state adjustment tank 14 is a container for performing a state adjustment process for adjusting the molten glass Gm to a state suitable for molding.
  • the state adjustment tank 14 is connected to the molding apparatus 15 by a glass supply path 16d.
  • the forming device 15 forms the molten glass Gm into a desired shape.
  • the molding apparatus 15 of this embodiment includes a molded body 15a that molds the molten glass Gm into a plate shape by an overflow downdraw method.
  • the molded body 15a has a substantially wedge shape in cross-sectional shape (cross-sectional shape orthogonal to the paper surface of FIG. 1), and an overflow groove (not shown) is formed in the upper part of the molded body 15a. Has been.
  • the molten glass Gm supplied to the overflow groove of the molded body 15a by the glass supply path 16d overflows from the overflow groove and flows down along the side wall surfaces (side surfaces located on the front and back sides of the paper surface) of the molded body 15a. To do.
  • the molten glass Gm flowing down fuses at the lower top of the side wall surface, whereby the glass ribbon Gr is formed.
  • the formed glass ribbon Gr is gradually cooled by a slow cooling furnace (not shown). After the plate glass is cut out from the slowly cooled glass ribbon Gr by a first cutting device (not shown), both ends in the width direction of the plate glass are removed by a second cutting device (not shown).
  • plate glass is manufactured as a glass article.
  • the manufactured plate glass has a thickness of 0.01 to 10 mm, for example, and is used for a flat panel display such as a liquid crystal display or an organic EL display, an organic EL illumination, a substrate such as a solar cell, or a protective cover.
  • the molding apparatus may execute another downdraw method such as a slot downdraw method.
  • the clarification container 12 includes a tubular portion 21 that transfers the molten glass Gm from upstream to downstream, a vent portion 22 that is provided at an upper portion of the tubular portion 21 and discharges gas generated in the molten glass Gm, and the tubular portion 21.
  • a reinforcing member 23 disposed on the inner surface, a flange portion 24, and an electrode portion 25 for energizing and heating the tubular portion 21 are provided.
  • the tubular portion 21 of the present embodiment is cylindrical, but is not limited to this shape, and may be a tubular shape provided with a space for flowing the molten glass Gm inside.
  • a glass supply path 16 a that connects the dissolution tank 11 and the tubular portion 21 is connected to one end portion (upstream end portion) in the longitudinal direction of the tubular portion 21.
  • a glass supply path 16 b that connects the homogenization tank 13 and the tubular portion 21 is connected to the other end portion (downstream end portion) in the longitudinal direction of the tubular portion 21.
  • the tubular portion 21 is made of platinum or a platinum alloy.
  • the vent portion 22 is provided so as to protrude upward from the upper portion of the tubular portion 21.
  • the vent portion 22 is configured in a cylindrical shape (for example, a cylindrical shape), is fixed to the upper outer surface of the tubular portion 21, and communicates with the inside of the tubular portion 21.
  • the vent portion 22 is made of platinum or a platinum alloy like the tubular portion 21.
  • a plurality of reinforcing members 23 are arranged at intervals along the longitudinal direction of the tubular portion 21.
  • Each reinforcing member 23 includes a main body portion 23 a extending along the circumferential direction of the tubular portion 21, and the main body portion 23 a is fixed (for example, welded) to the inner surface of the tubular portion 21. Further, an opening is formed inside the reinforcing member 23 so as to allow the molten glass Gm to pass therethrough.
  • Such a reinforcing member 23 can prevent the cross-sectional shape of the tubular portion 21 from being deformed while allowing the high-temperature molten glass Gm to pass through the tubular portion 21.
  • the reinforcing member 23 is made of platinum or a platinum alloy.
  • the reinforcing member 23 includes a missing portion 23 b located at the upper part of the tubular portion 21.
  • the reinforcing member 23 is preferably disposed over the entire circumference of the tubular portion 21.
  • the main body portion 23 a is located above the tubular portion 21 (circumferential direction).
  • the part where the main body part 23a is not arranged becomes a missing part 23b.
  • the missing portion 23 b is connected to an opening formed inside the reinforcing member 23.
  • the flange part 24 is arrange
  • the electrode part 25 is arrange
  • the tubular portion 21 of the clarification container 12 is filled with molten glass Gm. That is, a gas phase space is not formed in the tubular portion 21.
  • the tubular part 21 can be filled with the molten glass Gm (see FIG. 1). If the molten glass Gm is filled in the tubular portion 21 in this way, platinum will not volatilize on the inner surface of the tubular portion 21 due to a high-temperature gas phase space as in the prior art. Thereby, the situation which platinum volatilized like the past can mix in molten glass Gm can be prevented.
  • the reinforcing member 23 includes the missing portion 23 b positioned at the upper portion of the tubular portion 21. Thereby, the gas that has reached the upper portion of the tubular portion 21 passes through the missing portion 23 b and is discharged from the vent portion 22. Therefore, it is possible to suppress the gas from stagnating in the upper portion of the tubular portion 21 and forming a gas reservoir. This also prevents the volatilized platinum from being mixed into the molten glass Gm.
  • the height h (mm) of the reinforcing member 23 (main body portion 23a) is a ratio (h / d) to the inner diameter d (mm) of the tubular portion 21, and can be set to 2 to 40%, for example.
  • the width w (mm) of the missing portion 23b is a ratio (w / d) to the inner diameter d (mm) of the tubular portion 21 and can be set to 4 to 40%, for example.
  • this invention is not limited to the structure of said 1st embodiment, It is not limited to the above-mentioned effect.
  • the present invention can be variously modified without departing from the gist thereof.
  • the missing portion 23b is formed by arranging the main body portion 23a except for the upper portion (a part in the circumferential direction) of the tubular portion 21 is shown, but the present invention is not limited to this.
  • the missing portion 23b may be formed by providing a notch inside the upper portion of the annular main body portion 23a. From the viewpoint of further suppressing gas stagnation at the upper part of the tubular part 21, it is preferable to form the missing part 23b by arranging the main body part 23a except for the upper part of the tubular part 21 as in the first embodiment.
  • a partition plate 26 for stirring the molten glass may be further arranged on the inner surface of the tubular portion 21 as in the third embodiment shown in FIGS. 6 and 7.
  • Each of the partition plates 26 shown in FIGS. 6 and 7 is located at the upper part of the tubular part 21 and allows the gas that has reached the upper part of the tubular part 21 to pass therethrough, and below the first opening part 26a. And a second opening 26b through which the molten glass Gm passes. The first opening 26a and the second opening 26b are closed without being connected. The area of the second opening 26b is set larger than the area of the first opening 26a.
  • the first opening 26 a and the second opening 26 b are all different in the position in the cross section of the tubular portion 21. Specifically, in the partition plate 26 shown in FIG. 6, the first opening portion 26a is located on the right side, whereas in the partition plate 26 shown in FIG. 7, the first opening portion 26a is located on the left side. Further, in the partition plate 26 shown in FIG. 6, the second opening 26b is located at the center, whereas in the partition plate 26 shown in FIG. 7, the first opening 26a is located on the lower side.
  • the partition plates 26 in which the positions of the first opening 26 a and the second opening 26 b are different are alternately arranged along the longitudinal direction of the tubular portion 21.
  • the flow of the molten glass Gm meanders between the partition plates 26 instead of a straight line along the longitudinal direction of the tubular portion 21. For this reason, it becomes possible to perform a favorable defoaming process and homogenization of glass.
  • the first opening 26 a is provided at the upper part of the partition plate 26, the gas that has reached the upper part of the tubular part 21 can be passed therethrough. For this reason, since it can suppress that gas stagnates and the gas pool is formed in the upper part of the tubular part 21, the situation where the volatilized platinum mixes in the molten glass Gm can be prevented.
  • the first opening 26a may have a distance from the inner surface of the tubular part 21 without contacting the inner surface of the tubular part 21, but the first opening 26a shown in FIGS. It is preferable to contact the inner surface of the tubular portion 21 as in the third embodiment. Since the first opening 26a is in contact with the inner surface of the tubular portion 21, the gas that has reached the upper portion of the tubular portion 21 passes more smoothly through the first opening 26a, so that a higher-quality glass article can be manufactured. It becomes possible.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)

Abstract

A clarification container 12 is provided with: a tubular portion 21 through which molten glass Gm is transferred from upstream to downstream; a vent portion 22 which is disposed in an upper part of the tubular portion 21 and through which gas generated in the molten glass is discharged; and a reinforcement member 23 which is disposed on an inner peripheral surface of the tubular portion 21. The reinforcement member 23 is provided with a main body 23a extending along the circumferential direction of the tubular portion 21 and a gap portion 23b positioned in an upper part of the tubular portion 21. In a clarification step, the tubular portion 21 is filled up with molten glass, and, of the gas, gas reaching the upper part of the tubular portion 21 passes the gap portion 23b and is discharged from the vent portion 22. With this configuration, it is possible to perform efficient defoaming of molten glass and prevent evaporated platinum or platinum alloy from solidifying and being mixed in the molten glass.

Description

ガラス物品の製造方法Method for manufacturing glass article
　本発明は、白金又は白金合金により構成される清澄容器を用いるガラス物品の製造方法に関する。 The present invention relates to a method for producing a glass article using a clarification container composed of platinum or a platinum alloy.
　周知のように、液晶ディスプレイ、有機ＥＬディスプレイ等のフラットパネルディスプレイには、板ガラスが基板として使用される。基板用の板ガラスの材質としては、アモルファス・シリコンや多結晶シリコン等の薄膜特性を損なわない無アルカリガラスが好適に使用される。 As is well known, plate glass is used as a substrate for flat panel displays such as liquid crystal displays and organic EL displays. As the material of the plate glass for the substrate, alkali-free glass that does not impair the thin film characteristics such as amorphous silicon and polycrystalline silicon is preferably used.
　板ガラスといったガラス物品は、溶解工程、清澄工程、均質化工程、成形工程等の各工程を経て製造される。例えば特許文献１に開示される清澄工程では、白金又は白金合金で構成される管状の清澄容器内に気相空間が形成された状態で、溶融ガラスを加熱しながら通過させる。これにより、溶融ガラスから気相空間に泡を放出させる脱泡処理を行う。清澄容器の上部には、清澄容器内の気相空間に連通するとともに気相空間のガスを外部に排出するためのベント部（通気管）が設けられている。 Glass articles such as plate glass are manufactured through various processes such as a melting process, a clarification process, a homogenization process, and a molding process. For example, in the clarification process disclosed in Patent Document 1, molten glass is passed while being heated in a state in which a gas phase space is formed in a tubular clarification container composed of platinum or a platinum alloy. Thereby, the defoaming process which discharge | releases foam from a molten glass to gaseous-phase space is performed. In the upper part of the clarification container, a vent part (vent pipe) is provided for communicating with the gas phase space in the clarification container and for discharging the gas in the gas phase space to the outside.
　高温の溶融ガラスが通過するのに伴って清澄容器も高温となる。その際に清澄容器の強度低下を防止するため、清澄容器の内面にその周方向に沿って環状の補強部材を配置する場合がある。 As the high-temperature molten glass passes, the clarification container becomes hot. At that time, in order to prevent the strength of the clarification container from decreasing, an annular reinforcing member may be disposed on the inner surface of the clarification container along the circumferential direction.
特開２０１４－０２８７３４号公報JP 2014-028734 A
　従来の清澄工程では、清澄容器内の気相空間が高温になり、清澄容器の内面における揮発損耗が生じ易くなるという問題がある。また、清澄容器内のガスがベント部から排出される際に、ガスに含まれる白金又は白金合金の揮発成分が冷却され、凝固して溶融ガラス中に混入し、ガラス物品の品質を低下させるおそれがあった。 In the conventional clarification process, there is a problem that the gas phase space in the clarification container becomes high temperature and volatilization wear on the inner surface of the clarification container tends to occur. In addition, when the gas in the clarification container is discharged from the vent, the volatile component of platinum or platinum alloy contained in the gas is cooled, solidified, and mixed into the molten glass, which may deteriorate the quality of the glass article. was there.
　本発明は上記の事情に鑑みてなされたものであり、溶融ガラスの脱泡処理を良好に行うことができ、揮発した白金又は白金合金が凝固して溶融ガラスに混入するのを防止できるガラス物品の製造方法を提供することを技術的課題とする。 The present invention has been made in view of the above circumstances, and can perform a defoaming treatment of molten glass, and can prevent the volatilized platinum or platinum alloy from solidifying and mixing into the molten glass. It is a technical problem to provide a manufacturing method.
　本発明は上記の課題を解決するためのものであり、ガラス原料を溶解槽にて溶解して溶融ガラスを生成する溶解工程と、白金又は白金合金により構成される清澄容器に前記溶融ガラスを通過させることにより脱泡する清澄工程と、前記清澄工程を経た前記溶融ガラスを成形装置によりガラス物品として成形する成形工程とを備えるガラス物品の製造方法であって、前記清澄容器は、前記溶融ガラスを上流から下流へと移送する管状部と、前記管状部の上部に設けられ、前記溶融ガラス中に発生するガスを排出するベント部と、前記管状部の内面に配置される補強部材とを備え、前記補強部材は、前記管状部の周方向に沿って伸びる本体部と、前記管状部の上部に位置する欠落部とを備え、前記清澄工程では、前記管状部に前記溶融ガラスを充満させるとともに、前記ガスのうちで前記管状部の上部に到達したガスが前記欠落部を通過して前記ベント部から排出されることを特徴とする。 The present invention is for solving the above-mentioned problems, and a melting step of melting a glass raw material in a melting tank to produce a molten glass, and passing the molten glass through a clarification container composed of platinum or a platinum alloy. And a forming step of forming the molten glass that has undergone the refining step as a glass article by a forming apparatus, wherein the refining container is a method for forming the molten glass. A tubular portion that is transported from upstream to downstream; a vent portion that is provided at an upper portion of the tubular portion and that discharges gas generated in the molten glass; and a reinforcing member that is disposed on an inner surface of the tubular portion, The reinforcing member includes a main body portion extending along a circumferential direction of the tubular portion, and a missing portion located at an upper portion of the tubular portion, and in the refining step, the molten glass is applied to the tubular portion. Together we are satisfied, a gas that has reached the upper part of the tubular portion among the gas, characterized in that it is discharged from the vent through the missing section.
　かかる方法によれば、清澄容器における管状部の内部空間全てに溶融ガラスが満たされるので、管状部の内面と溶融ガラスとの間に気相空間が形成されなくなる。この場合、従来の環状の補強部材を用いると、溶融ガラス中に発生するガスが補強部材に堰き止められ、管状部の上部にガスが停滞する（後述の図８の符号Ａ参照）。上記方法では、補強部材が管状部の上部に位置する欠落部を備えることにより、管状部の上部に到達したガスが欠落部を通過してベント部から排出される。これらにより、従来のように高温の気相空間において管状部の内面から白金が揮発することを防止できる。よって、溶融ガラスへの白金の混入を防止して溶融ガラスの脱泡処理を良好に行うとともに、高品質なガラス物品を製造することが可能になる。 According to such a method, since the molten glass is filled in the entire internal space of the tubular portion in the clarification container, no gas phase space is formed between the inner surface of the tubular portion and the molten glass. In this case, when a conventional annular reinforcing member is used, the gas generated in the molten glass is blocked by the reinforcing member, and the gas stagnates at the upper portion of the tubular portion (see reference A in FIG. 8 described later). In the method described above, the reinforcing member includes the missing portion positioned at the upper portion of the tubular portion, so that the gas that has reached the upper portion of the tubular portion passes through the missing portion and is discharged from the vent portion. As a result, it is possible to prevent platinum from volatilizing from the inner surface of the tubular portion in a high-temperature gas phase space as in the prior art. Therefore, it is possible to prevent the mixing of platinum into the molten glass and to perform the defoaming treatment of the molten glass satisfactorily and to manufacture a high-quality glass article.
　上記の場合において、前記本体部は、前記管状部の上部を除いて配置され、前記欠落部は、前記本体部が配置されない部分によって構成されることが好ましい。これにより、管状部の上部でのガスの停滞をさらに抑制できるので、より高品質なガラス物品を製造することが可能となる。 In the above case, it is preferable that the main body portion is disposed except for an upper portion of the tubular portion, and the missing portion is constituted by a portion where the main body portion is not disposed. Thereby, since the stagnation of the gas in the upper part of the tubular part can be further suppressed, it becomes possible to manufacture a higher quality glass article.
　上記の場合において、前記清澄容器は、前記溶融ガラスを撹拌するために前記管状部の内面に配置される仕切り板をさらに備え、前記仕切り板は、前記管状部の上部に位置するとともに前記管状部の上部に到達したガスを通過させる第一開口部と、前記第一開口部の下方に設けられるとともに前記溶融ガラスを通過させる第二開口部とを備えることが好ましい。これにより、仕切り板によって清澄容器内の溶融ガラスを撹拌する場合であっても、管状部の上部に到達したガスを第一開口部に通過させてベント部から排出できる。したがって、溶融ガラスの脱泡処理を良好に行うとともに、溶融ガラスへの白金の混入を防止して高品質なガラス物品を製造することが可能になる。 In the above case, the clarification container further includes a partition plate disposed on an inner surface of the tubular portion for stirring the molten glass, and the partition plate is located at an upper portion of the tubular portion and the tubular portion. It is preferable to provide the 1st opening part which lets the gas which reached | attained the upper part pass, and the 2nd opening part which lets the said molten glass pass through while being provided under the said 1st opening part. Thereby, even when it is a case where the molten glass in a clarification container is stirred with a partition plate, the gas which reached | attained the upper part of a tubular part can be passed through a 1st opening part, and can be discharged | emitted from a vent part. Therefore, the defoaming treatment of the molten glass can be performed satisfactorily, and the high-quality glass article can be manufactured by preventing the platinum from being mixed into the molten glass.
　上記の場合において、前記第一開口部は、前記管状部の内面と接触することが好ましい。これにより、管状部の上部でのガスの停滞をさらに抑制できるので、より高品質なガラス物品を製造することが可能となる。 In the above case, the first opening is preferably in contact with the inner surface of the tubular portion. Thereby, since the stagnation of the gas in the upper part of the tubular part can be further suppressed, it becomes possible to manufacture a higher quality glass article.
　上記の場合において、前記溶解槽における前記溶融ガラスの液面を、前記管状部の内面の頂部よりも上方に位置させることにより、前記管状部に前記溶融ガラスを充満させることが好ましい。これにより、管状部の内面と溶融ガラスとの間に気相空間を確実に形成することなく清澄工程を実行できる。 In the above case, it is preferable that the molten glass is filled with the molten glass by positioning the liquid surface of the molten glass in the melting tank above the top of the inner surface of the tubular portion. Thereby, the clarification process can be executed without reliably forming a gas phase space between the inner surface of the tubular portion and the molten glass.
　本発明によれば、溶融ガラスの脱泡処理を良好に行うことができ、揮発した白金又は白金合金が凝固して溶融ガラスに混入するのを防止できる。 According to the present invention, the defoaming treatment of the molten glass can be performed satisfactorily, and volatilized platinum or platinum alloy can be prevented from solidifying and mixing into the molten glass.
ガラス物品の製造装置の全体構成を示す側面図である。It is a side view which shows the whole structure of the manufacturing apparatus of a glass article. 第一実施形態の清澄容器の側面図である。It is a side view of the clarification container of 1st embodiment. 第一実施形態の清澄容器の横断面図である。It is a cross-sectional view of the clarification container of 1st embodiment. 第一実施形態の清澄容器の要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of the clarification container of 1st embodiment. 第二実施形態の清澄容器の横断面図である。It is a cross-sectional view of the clarification container of 2nd embodiment. 第三実施形態の清澄容器が備える仕切り板を示す横断面図である。It is a cross-sectional view which shows the partition plate with which the clarification container of 3rd embodiment is provided. 第三実施形態の清澄容器が備える別の仕切り板を示す横断面図である。It is a cross-sectional view which shows another partition plate with which the clarification container of 3rd embodiment is provided. 従来の清澄容器の要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of the conventional clarification container.
　以下、本発明を実施するための形態について図面を参照しながら説明する。図１～図４は、本発明のガラス物品の製造方法の第一実施形態を示す。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the method for producing a glass article of the present invention.
　図１に示すように、本実施形態に係るガラス物品の製造装置１０は、上流側から順に、溶解槽１１と、清澄容器１２と、均質化槽（攪拌槽）１３と、状態調整槽１４と、成形装置１５と、それらを連結するガラス供給路１６ａ～１６ｄとを備える。 As shown in FIG. 1, the manufacturing apparatus 10 of the glass article which concerns on this embodiment is the dissolution tank 11, the clarification container 12, the homogenization tank (stirring tank) 13, and the state adjustment tank 14 in an order from the upstream. The molding apparatus 15 and glass supply paths 16a to 16d for connecting them are provided.
　溶解槽１１は、投入されたガラス原料を溶解して、溶融ガラスＧｍを得る溶解工程を行うための容器である。溶解槽１１は、ガラス供給路１６ａによって清澄容器１２に接続されている。 The melting tank 11 is a container for performing a melting step of melting molten glass Gm to obtain molten glass Gm. The dissolution tank 11 is connected to the clarification container 12 by a glass supply path 16a.
　清澄容器１２は、溶解槽１１から供給された溶融ガラスＧｍを清澄剤等の作用により脱泡する清澄工程を行うための容器である。清澄容器１２は、ガラス供給路１６ｂによって均質化槽１３に接続されている。 The clarification container 12 is a container for performing a clarification process in which the molten glass Gm supplied from the dissolution tank 11 is defoamed by the action of a clarifier or the like. The clarification container 12 is connected to the homogenization tank 13 by a glass supply path 16b.
　均質化槽１３は、清澄された溶融ガラスＧｍを攪拌翼等により攪拌し、均一化する均質化工程を行うための容器である。均質化槽１３は、ガラス供給路１６ｃによって状態調整槽１４に接続されている。 The homogenization tank 13 is a container for performing a homogenization process in which the clarified molten glass Gm is stirred with a stirring blade or the like to make it uniform. The homogenization tank 13 is connected to the state adjustment tank 14 by a glass supply path 16c.
　状態調整槽１４は、溶融ガラスＧｍを成形に適した状態に調整する状態調整工程を行うための容器である。状態調整槽１４は、ガラス供給路１６ｄによって成形装置１５に接続されている。 The state adjustment tank 14 is a container for performing a state adjustment process for adjusting the molten glass Gm to a state suitable for molding. The state adjustment tank 14 is connected to the molding apparatus 15 by a glass supply path 16d.
　成形装置１５は、溶融ガラスＧｍを所望の形状に成形する。本実施形態の成形装置１５は、オーバーフローダウンドロー法によって溶融ガラスＧｍを板状に成形する成形体１５ａを備える。詳細には、成形体１５ａは、断面形状（図１の紙面と直交する断面形状）が略楔形状を成しており、この成形体１５ａの上部には、オーバーフロー溝（図示せず）が形成されている。 The forming device 15 forms the molten glass Gm into a desired shape. The molding apparatus 15 of this embodiment includes a molded body 15a that molds the molten glass Gm into a plate shape by an overflow downdraw method. Specifically, the molded body 15a has a substantially wedge shape in cross-sectional shape (cross-sectional shape orthogonal to the paper surface of FIG. 1), and an overflow groove (not shown) is formed in the upper part of the molded body 15a. Has been.
　ガラス供給路１６ｄによって成形体１５ａのオーバーフロー溝に供給された溶融ガラスＧｍは、オーバーフロー溝から溢れ出て、成形体１５ａの両側の側壁面（紙面の表裏面側に位置する側面）に沿って流下する。流下する溶融ガラスＧｍが側壁面の下頂部で融合することにより、ガラスリボンＧｒが成形される。成形されたガラスリボンＧｒは徐冷炉（図示せず）によって徐冷される。徐冷されたガラスリボンＧｒから第一切断装置（図示せず）によって板ガラスが切り出された後、その板ガラスの幅方向の両端部が第二切断装置（図示せず）によって除去される。このようにしてガラス物品として板ガラスが製造される。なお、徐冷されたガラスリボンＧｒは、幅方向の両端部を切断して除去した後でロール状に巻き取ることにより、ガラス物品としてガラスロールを製造してもよい。 The molten glass Gm supplied to the overflow groove of the molded body 15a by the glass supply path 16d overflows from the overflow groove and flows down along the side wall surfaces (side surfaces located on the front and back sides of the paper surface) of the molded body 15a. To do. The molten glass Gm flowing down fuses at the lower top of the side wall surface, whereby the glass ribbon Gr is formed. The formed glass ribbon Gr is gradually cooled by a slow cooling furnace (not shown). After the plate glass is cut out from the slowly cooled glass ribbon Gr by a first cutting device (not shown), both ends in the width direction of the plate glass are removed by a second cutting device (not shown). Thus, plate glass is manufactured as a glass article. In addition, you may manufacture a glass roll as a glass article by winding the glass ribbon Gr annealed slowly in the shape of a roll after cut | disconnecting and removing the both ends of the width direction.
　製造された板ガラスは、例えば、厚みが０．０１～１０ｍｍであって、液晶ディスプレイや有機ＥＬディスプレイなどのフラットパネルディスプレイ、有機ＥＬ照明、太陽電池などの基板や保護カバーに利用される。なお、成形装置は、スロットダウンドロー法などの他のダウンドロー法を実行するものであってもよい。 The manufactured plate glass has a thickness of 0.01 to 10 mm, for example, and is used for a flat panel display such as a liquid crystal display or an organic EL display, an organic EL illumination, a substrate such as a solar cell, or a protective cover. Note that the molding apparatus may execute another downdraw method such as a slot downdraw method.
　以下、清澄容器１２の具体的構成について、図２および図３を参照しながら説明する。清澄容器１２は、溶融ガラスＧｍを上流から下流へと移送する管状部２１と、管状部２１の上部に設けられ、溶融ガラスＧｍ中に発生するガスを排出するベント部２２と、管状部２１の内面に配置される補強部材２３と、フランジ部２４と、管状部２１を通電加熱するための電極部２５とを備える。 Hereinafter, a specific configuration of the clarification container 12 will be described with reference to FIGS. 2 and 3. The clarification container 12 includes a tubular portion 21 that transfers the molten glass Gm from upstream to downstream, a vent portion 22 that is provided at an upper portion of the tubular portion 21 and discharges gas generated in the molten glass Gm, and the tubular portion 21. A reinforcing member 23 disposed on the inner surface, a flange portion 24, and an electrode portion 25 for energizing and heating the tubular portion 21 are provided.
　本実施形態の管状部２１は、円筒状であるが、この形状に限定されるものではなく、管状で内部に溶融ガラスＧｍを流動させる空間を備えていればよい。管状部２１における長手方向の一端部（上流側端部）には、溶解槽１１と当該管状部２１とを接続するガラス供給路１６ａが接続されている。管状部２１の長手方向の他端部（下流側端部）には、均質化槽１３と管状部２１とを接続するガラス供給路１６ｂが接続されている。管状部２１は、白金又は白金合金により構成される。 The tubular portion 21 of the present embodiment is cylindrical, but is not limited to this shape, and may be a tubular shape provided with a space for flowing the molten glass Gm inside. A glass supply path 16 a that connects the dissolution tank 11 and the tubular portion 21 is connected to one end portion (upstream end portion) in the longitudinal direction of the tubular portion 21. A glass supply path 16 b that connects the homogenization tank 13 and the tubular portion 21 is connected to the other end portion (downstream end portion) in the longitudinal direction of the tubular portion 21. The tubular portion 21 is made of platinum or a platinum alloy.
　ベント部２２は、管状部２１の上部から上方に突出するように設けられる。ベント部２２は、筒状（例えば円筒状）に構成されるとともに、管状部２１の上部外面に固定され、管状部２１の内部と連通している。ベント部２２は、管状部２１と同様に白金又は白金合金により構成される。 The vent portion 22 is provided so as to protrude upward from the upper portion of the tubular portion 21. The vent portion 22 is configured in a cylindrical shape (for example, a cylindrical shape), is fixed to the upper outer surface of the tubular portion 21, and communicates with the inside of the tubular portion 21. The vent portion 22 is made of platinum or a platinum alloy like the tubular portion 21.
　補強部材２３は、管状部２１の長手方向に沿って間隔を設けて複数配置される。各補強部材２３は、管状部２１の周方向に沿って伸びる本体部２３ａを備え、その本体部２３ａは、管状部２１の内面に固定（例えば溶接）されている。また、補強部材２３の内側には溶融ガラスＧｍを通過させるために開口が形成されている。このような補強部材２３により、高温の溶融ガラスＧｍを管状部２１に通過させながら、管状部２１の断面形状が変形するのを防止できる。補強部材２３は、白金又は白金合金により構成される。 A plurality of reinforcing members 23 are arranged at intervals along the longitudinal direction of the tubular portion 21. Each reinforcing member 23 includes a main body portion 23 a extending along the circumferential direction of the tubular portion 21, and the main body portion 23 a is fixed (for example, welded) to the inner surface of the tubular portion 21. Further, an opening is formed inside the reinforcing member 23 so as to allow the molten glass Gm to pass therethrough. Such a reinforcing member 23 can prevent the cross-sectional shape of the tubular portion 21 from being deformed while allowing the high-temperature molten glass Gm to pass through the tubular portion 21. The reinforcing member 23 is made of platinum or a platinum alloy.
　補強部材２３は、管状部２１の上部に位置する欠落部２３ｂを備える。清澄容器１２の補強のためには、補強部材２３は管状部２１の全周にわたって配置されることが好ましいが、本実施形態の補強部材２３では、本体部２３ａが管状部２１の上部（周方向の一部）を除いて配置されており、本体部２３ａが配置されない部分が欠落部２３ｂとなる。この欠落部２３ｂは、補強部材２３の内側に形成される開口と繋がっている。 The reinforcing member 23 includes a missing portion 23 b located at the upper part of the tubular portion 21. In order to reinforce the fining container 12, the reinforcing member 23 is preferably disposed over the entire circumference of the tubular portion 21. However, in the reinforcing member 23 of the present embodiment, the main body portion 23 a is located above the tubular portion 21 (circumferential direction). The part where the main body part 23a is not arranged becomes a missing part 23b. The missing portion 23 b is connected to an opening formed inside the reinforcing member 23.
　フランジ部２４は、管状部２１の長手方向の両端に配置され、白金又は白金合金により構成される。電極部２５は、フランジ部２４の外側（本実施形態では上側）に配置され、電源と接続される。電極部２５に所定の電圧を印加することにより、フランジ部２４を介して管状部２１に電流が流れて管状部２１が昇温する。これに伴って管状部２１の内部の溶融ガラスＧｍが加熱される。 The flange part 24 is arrange | positioned at the both ends of the longitudinal direction of the tubular part 21, and is comprised with platinum or a platinum alloy. The electrode part 25 is arrange | positioned on the outer side (upper side in this embodiment) of the flange part 24, and is connected with a power supply. By applying a predetermined voltage to the electrode part 25, a current flows through the tubular part 21 via the flange part 24 and the tubular part 21 is heated. Along with this, the molten glass Gm inside the tubular portion 21 is heated.
　本実施形態の清澄工程では、清澄容器１２の管状部２１に溶融ガラスＧｍを充満させる。すなわち、管状部２１には、気相空間が形成されない。溶解槽１１の溶融ガラスＧｍの液面Ｇｍａを、管状部２１の内面の頂部２１ａよりも上方に位置させることにより、管状部２１に溶融ガラスＧｍを充満させることができる（図１参照）。このように管状部２１に溶融ガラスＧｍを充満させれば、従来のように高温の気相空間により管状部２１の内面で白金が揮発することがなくなる。これにより、従来のように揮発した白金が溶融ガラスＧｍに混入する事態を防止できる。 In the clarification step of the present embodiment, the tubular portion 21 of the clarification container 12 is filled with molten glass Gm. That is, a gas phase space is not formed in the tubular portion 21. By positioning the liquid level Gma of the molten glass Gm in the melting tank 11 above the top 21a of the inner surface of the tubular part 21, the tubular part 21 can be filled with the molten glass Gm (see FIG. 1). If the molten glass Gm is filled in the tubular portion 21 in this way, platinum will not volatilize on the inner surface of the tubular portion 21 due to a high-temperature gas phase space as in the prior art. Thereby, the situation which platinum volatilized like the past can mix in molten glass Gm can be prevented.
　このように管状部２１に溶融ガラスＧｍを充満させる場合、図８に示すような従来の環状の補強部材Ｌ（欠落部を有さない補強部材）を用いると、ガス溜りＡが形成される。これは、溶融ガラス中で発生したガスが上昇して管状部２１の上部に到達すると、補強部材Ｌで堰き止められるからである。これに対し、本実施形態の製造方法では、補強部材２３が管状部２１の上部に位置する欠落部２３ｂを備える。これにより、管状部２１の上部に到達したガスは、欠落部２３ｂを通過してベント部２２から排出される。したがって、管状部２１の上部にガスが停滞してガス溜りが形成されるのを抑制できる。これによっても、揮発した白金が溶融ガラスＧｍに混入する事態を防止できる。 In this way, when the tubular portion 21 is filled with the molten glass Gm, when a conventional annular reinforcing member L (a reinforcing member having no missing portion) as shown in FIG. 8 is used, a gas reservoir A is formed. This is because when the gas generated in the molten glass rises and reaches the upper part of the tubular portion 21, it is dammed by the reinforcing member L. On the other hand, in the manufacturing method according to the present embodiment, the reinforcing member 23 includes the missing portion 23 b positioned at the upper portion of the tubular portion 21. Thereby, the gas that has reached the upper portion of the tubular portion 21 passes through the missing portion 23 b and is discharged from the vent portion 22. Therefore, it is possible to suppress the gas from stagnating in the upper portion of the tubular portion 21 and forming a gas reservoir. This also prevents the volatilized platinum from being mixed into the molten glass Gm.
　補強部材２３（本体部２３ａ）の高さｈ（ｍｍ）は、管状部２１の内径ｄ（ｍｍ）に対する比率（ｈ／ｄ）で、例えば２～４０％に設定することができる。 The height h (mm) of the reinforcing member 23 (main body portion 23a) is a ratio (h / d) to the inner diameter d (mm) of the tubular portion 21, and can be set to 2 to 40%, for example.
　欠落部２３ｂの幅ｗ（ｍｍ）は、管状部２１の内径ｄ（ｍｍ）に対する比率（ｗ／ｄ）で、例えば４～４０％に設定することができる。 The width w (mm) of the missing portion 23b is a ratio (w / d) to the inner diameter d (mm) of the tubular portion 21 and can be set to 4 to 40%, for example.
　なお、本発明は、上記第一実施形態の構成に限定されるものではなく、上記した作用効果に限定されるものでもない。本発明は、その要旨を逸脱しない範囲で種々の変更が可能である。 In addition, this invention is not limited to the structure of said 1st embodiment, It is not limited to the above-mentioned effect. The present invention can be variously modified without departing from the gist thereof.
　第一実施形態では、管状部２１の上部（周方向の一部）を除いて本体部２３ａを配置することによって欠落部２３ｂを形成する例を示したが、これに限定されない。図５に示す第二実施形態のように、環状の本体部２３ａの上部の内側に切欠きを設けることによって欠落部２３ｂを形成してもよい。管状部２１の上部でのガスの停滞をさらに抑制する観点では、第一実施形態のように管状部２１の上部を除いて本体部２３ａを配置することによって欠落部２３ｂを形成することが好ましい。 In the first embodiment, the example in which the missing portion 23b is formed by arranging the main body portion 23a except for the upper portion (a part in the circumferential direction) of the tubular portion 21 is shown, but the present invention is not limited to this. As in the second embodiment shown in FIG. 5, the missing portion 23b may be formed by providing a notch inside the upper portion of the annular main body portion 23a. From the viewpoint of further suppressing gas stagnation at the upper part of the tubular part 21, it is preferable to form the missing part 23b by arranging the main body part 23a except for the upper part of the tubular part 21 as in the first embodiment.
　第一実施形態では、補強部材２３のみを管状部２１の内面に配置する例を示したが、これに限定されない。図６および図７に示す第三実施形態のように、溶融ガラスを撹拌するための仕切り板２６を管状部２１の内面にさらに配置してもよい。 In the first embodiment, an example in which only the reinforcing member 23 is disposed on the inner surface of the tubular portion 21 is shown, but the present invention is not limited to this. A partition plate 26 for stirring the molten glass may be further arranged on the inner surface of the tubular portion 21 as in the third embodiment shown in FIGS. 6 and 7.
　図６および図７に示す仕切り板２６は、いずれも、管状部２１の上部に位置するとともに管状部２１の上部に到達したガスを通過させる第一開口部２６ａと、第一開口部２６ａの下方に設けられるとともに溶融ガラスＧｍを通過させる第二開口部２６ｂとを備える。第一開口部２６ａと第二開口部２６ｂは、繋がることなく、それぞれ閉じている。第二開口部２６ｂの面積は、第一開口部２６ａの面積よりも大きく設定される。 Each of the partition plates 26 shown in FIGS. 6 and 7 is located at the upper part of the tubular part 21 and allows the gas that has reached the upper part of the tubular part 21 to pass therethrough, and below the first opening part 26a. And a second opening 26b through which the molten glass Gm passes. The first opening 26a and the second opening 26b are closed without being connected. The area of the second opening 26b is set larger than the area of the first opening 26a.
　図６に示す仕切り板２６と図７に示す仕切り板２６とでは、第一開口部２６ａおよび第二開口部２６ｂは、いずれも、管状部２１の横断面での位置が異なる。具体的には、図６に示す仕切り板２６では、第一開口部２６ａが右側に位置するのに対し、図７に示す仕切り板２６では、第一開口部２６ａが左側に位置する。また、図６に示す仕切り板２６では、第二開口部２６ｂが中央に位置するのに対し、図７に示す仕切り板２６では、第一開口部２６ａが下側に位置する。 In the partition plate 26 shown in FIG. 6 and the partition plate 26 shown in FIG. 7, the first opening 26 a and the second opening 26 b are all different in the position in the cross section of the tubular portion 21. Specifically, in the partition plate 26 shown in FIG. 6, the first opening portion 26a is located on the right side, whereas in the partition plate 26 shown in FIG. 7, the first opening portion 26a is located on the left side. Further, in the partition plate 26 shown in FIG. 6, the second opening 26b is located at the center, whereas in the partition plate 26 shown in FIG. 7, the first opening 26a is located on the lower side.
　このように第一開口部２６ａおよび第二開口部２６ｂの位置が異なる仕切り板２６が、管状部２１の長手方向に沿って交互に配置される。これにより、溶融ガラスＧｍの流れは、管状部２１の長手方向に沿う直線状でなく、仕切り板２６の間で蛇行する。このため、良好な脱泡処理やガラスの均質化を行うことが可能になる。 Thus, the partition plates 26 in which the positions of the first opening 26 a and the second opening 26 b are different are alternately arranged along the longitudinal direction of the tubular portion 21. Thereby, the flow of the molten glass Gm meanders between the partition plates 26 instead of a straight line along the longitudinal direction of the tubular portion 21. For this reason, it becomes possible to perform a favorable defoaming process and homogenization of glass.
　加えて、第一開口部２６ａは、仕切り板２６の上部に設けられることから、管状部２１の上部に到達したガスを通過させることができる。このため、管状部２１の上部にガスが停滞してガス溜りが形成されるのを抑制できるので、揮発した白金が溶融ガラスＧｍに混入する事態を防止できる。 In addition, since the first opening 26 a is provided at the upper part of the partition plate 26, the gas that has reached the upper part of the tubular part 21 can be passed therethrough. For this reason, since it can suppress that gas stagnates and the gas pool is formed in the upper part of the tubular part 21, the situation where the volatilized platinum mixes in the molten glass Gm can be prevented.
　第一開口部２６ａは、仕切り板２６の上部に位置すれば、管状部２１の内面と接することなく、管状部２１の内面と距離を有してもよいが、図６および図７に示す第三実施形態のように、管状部２１の内面と接することが好ましい。第一開口部２６ａが管状部２１の内面と接することにより、管状部２１の上部に到達したガスが第一開口部２６ａをより円滑に通過するので、より高品質なガラス物品を製造することが可能となる。 As long as the first opening 26a is located at the upper part of the partition plate 26, the first opening 26a may have a distance from the inner surface of the tubular part 21 without contacting the inner surface of the tubular part 21, but the first opening 26a shown in FIGS. It is preferable to contact the inner surface of the tubular portion 21 as in the third embodiment. Since the first opening 26a is in contact with the inner surface of the tubular portion 21, the gas that has reached the upper portion of the tubular portion 21 passes more smoothly through the first opening 26a, so that a higher-quality glass article can be manufactured. It becomes possible.
１０　　ガラス物品の製造装置
１１　　溶解槽
１２　　清澄容器
１３　　均質化槽
１４　　状態調整槽
１５　　成形装置
１５ａ　成形体
１６ａ～１６ｄ　ガラス供給路
２１　　管状部
２１ａ　管状部の内面の頂部
２２　　ベント部
２３　　補強部材
２３ａ　本体部
２３ｂ　欠落部
２４　　フランジ部
２５　　電極部
２６　　仕切り板
２６ａ　第一開口部
２６ｂ　第二開口部
Ｇｍ　　溶融ガラス
Ｇｒ　　ガラスリボン DESCRIPTION OF SYMBOLS 10 Glass article manufacturing apparatus 11 Dissolution tank 12 Clarification container 13 Homogenization tank 14 Condition adjustment tank 15 Molding apparatus 15a Molded body 16a-16d Glass supply path 21 Tubular part 21a Top part 22 of inner surface of tubular part Vent part 23 Reinforcement member 23a Main body Part 23b missing part 24 flange part 25 electrode part 26 partition plate 26a first opening part 26b second opening part Gm molten glass Gr glass ribbon

Claims (5)

  1. 　ガラス原料を溶解槽にて溶解して溶融ガラスを生成する溶解工程と、白金又は白金合金により構成される清澄容器に前記溶融ガラスを通過させることにより脱泡する清澄工程と、前記清澄工程を経た前記溶融ガラスを成形装置によりガラス物品として成形する成形工程とを備えるガラス物品の製造方法であって、
    　前記清澄容器は、前記溶融ガラスを上流から下流へと移送する管状部と、前記管状部の上部に設けられ、前記溶融ガラス中に発生するガスを排出するベント部と、前記管状部の内面に配置される補強部材とを備え、
    　前記補強部材は、前記管状部の周方向に沿って伸びる本体部と、前記管状部の上部に位置する欠落部とを備え、
    　前記清澄工程では、前記管状部に前記溶融ガラスを充満させるとともに、前記ガスのうちで前記管状部の上部に到達したガスが前記欠落部を通過して前記ベント部から排出されることを特徴とするガラス物品の製造方法。     A melting step of melting a glass raw material in a melting tank to produce a molten glass, a clarification step of defoaming the molten glass by passing it through a clarification container composed of platinum or a platinum alloy, and the clarification step A glass article manufacturing method comprising a molding step of molding the molten glass as a glass article with a molding apparatus,
    The clarification container includes a tubular part for transferring the molten glass from upstream to downstream, a vent part provided at an upper part of the tubular part, for discharging a gas generated in the molten glass, and an inner surface of the tubular part. A reinforcing member to be disposed;
    The reinforcing member includes a main body portion extending along a circumferential direction of the tubular portion, and a missing portion located at an upper portion of the tubular portion,
    In the clarification step, the tubular portion is filled with the molten glass, and the gas that has reached the upper portion of the tubular portion out of the gas passes through the missing portion and is discharged from the vent portion. A method for manufacturing a glass article.
  2. 　前記本体部は、前記管状部の上部を除いて配置され、
    　前記欠落部は、前記本体部が配置されない部分によって構成されることを特徴とする請求項１に記載のガラス物品の製造方法。     The main body portion is arranged except for an upper portion of the tubular portion,
    The method of manufacturing a glass article according to claim 1, wherein the missing portion is configured by a portion where the main body portion is not disposed.
  3. 　前記清澄容器は、前記溶融ガラスを撹拌するために前記管状部の内面に配置される仕切り板をさらに備え、
    　前記仕切り板は、前記管状部の上部に位置するとともに前記管状部の上部に到達したガスを通過させる第一開口部と、前記第一開口部の下方に設けられるとともに前記溶融ガラスを通過させる第二開口部とを備えることを特徴とする請求項１または２に記載のガラス物品の製造方法。     The clarification container further includes a partition plate disposed on the inner surface of the tubular portion for stirring the molten glass,
    The partition plate is positioned above the tubular part and allows a gas that has reached the upper part of the tubular part to pass therethrough, and is provided below the first opening part and allows the molten glass to pass therethrough. The glass article manufacturing method according to claim 1, further comprising two openings.
  4. 　前記第一開口部は、前記管状部の内面と接することを特徴とする請求項３に記載のガラス物品の製造方法。 The method for manufacturing a glass article according to claim 3, wherein the first opening is in contact with an inner surface of the tubular portion.
  5. 　前記溶解槽における前記溶融ガラスの液面を、前記管状部の内面の頂部よりも上方に位置させることにより、前記管状部に前記溶融ガラスを充満させることを特徴とする請求項１～４のいずれかに記載のガラス物品の製造方法。 5. The molten glass is filled in the tubular portion by positioning the liquid surface of the molten glass in the melting tank above the top of the inner surface of the tubular portion. A method for producing a glass article according to claim 1.
PCT/JP2019/020021 2018-05-30 2019-05-21 Glass article production method WO2019230488A1 (en)

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