JP2002234736A - Flow rate regulating device of fused glass - Google Patents

Flow rate regulating device of fused glass

Info

Publication number
JP2002234736A
JP2002234736A JP2001025835A JP2001025835A JP2002234736A JP 2002234736 A JP2002234736 A JP 2002234736A JP 2001025835 A JP2001025835 A JP 2001025835A JP 2001025835 A JP2001025835 A JP 2001025835A JP 2002234736 A JP2002234736 A JP 2002234736A
Authority
JP
Japan
Prior art keywords
outflow pipe
glass
power supply
platinum
outflow
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.)
Withdrawn
Application number
JP2001025835A
Other languages
Japanese (ja)
Inventor
Tamakazu Yogo
瑞和 余語
Isamu Shigyo
勇 執行
Hiroyuki Kubo
裕之 久保
Masayuki Tomita
昌之 冨田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP2001025835A priority Critical patent/JP2002234736A/en
Publication of JP2002234736A publication Critical patent/JP2002234736A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/08Feeder spouts, e.g. gob feeders
    • C03B7/094Means for heating, cooling or insulation
    • C03B7/096Means for heating, cooling or insulation for heating
    • C03B7/098Means for heating, cooling or insulation for heating electric

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

Abstract

PROBLEM TO BE SOLVED: To provide a flow rate regulating device of fused glass which enables the supply of a fused glass block which is small in weight fluctuation, is excellent in shape, is stria free and is excellent in optical quality for a long time to a molding die. SOLUTION: This flow rate regulating device of fused glass is provided with an outlet pipe 3 made of platinum or platinum alloy which is attached to an outlet 2 of a glass fusion vessel 1, power feeding terminals 11, 12 made of platinum or platinum alloy which is connected with the outlet pipe in order to impress the DC or AC voltage on the outlet pipe 3 and a power feeder 16 for supplying the power to the power feeding terminals. Furthermore, terminals 13, 14 having bends made of gold are connected with the base edge sides of the power feeding terminals 11, 12 and the terminals made of gold are equal in electric resistance and is smaller in strength as compared to the power feeding terminals 11, 12 made of platinum or platinum alloy.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ガラス流出管を通
して溶融ガラスを成形型等へ供給するに際し、長期にわ
たって流出管の変形を防止でき、正確な流量を実現する
ための流量調節装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device for preventing a deformation of an outflow pipe for a long time when supplying molten glass to a molding die or the like through a glass outflow pipe and realizing an accurate flow rate. is there.

【0002】[0002]

【従来の技術】溶融ガラスを成形型等へ供給する場合に
ガラスの流量を調節するための溶融ガラス流量調節装置
は、特公昭40−11742号公報や、特開昭64−7
2927号公報に開示されている。前者を図4に、後者
を図5に示す。
2. Description of the Related Art A molten glass flow rate adjusting device for adjusting the flow rate of glass when supplying the molten glass to a molding die or the like is disclosed in Japanese Patent Publication No. 40-11742 and Japanese Patent Application Laid-Open No. Sho 64-7.
It is disclosed in Japanese Patent Publication No. 2927. The former is shown in FIG. 4 and the latter is shown in FIG.

【0003】前者の装置を図4を用いて説明する。この
装置は、ガラス溶融槽101の流出口102に取付けら
れた白金または白金合金製の流出管103と、この流出
管103を被覆する保温材104と、流出管103に直
流または交流電圧を印加するために流出管103に接続
された給電端子105,106および給電装置107
と、流出管103の温度(流出管内を流れる溶融ガラス
108の温度)を検知するための、流出管103に溶接
された熱電対109とを備えている。この場合、熱電対
109で、流出管103あるいは溶融ガラス108の温
度を検知しながら、流出管103に直流あるいは交流電
圧を印加し、この流出管103自体の発熱作用によりガ
ラス108の粘性を制御し、ガラス108の流量の調節
を行なう。
The former device will be described with reference to FIG. This apparatus applies an outflow pipe 103 made of platinum or a platinum alloy attached to an outflow port 102 of a glass melting tank 101, a heat insulating material 104 covering the outflow pipe 103, and applies a DC or AC voltage to the outflow pipe 103. Terminals 105 and 106 connected to the outflow pipe 103 and the power supply device 107
And a thermocouple 109 welded to the outflow pipe 103 for detecting the temperature of the outflow pipe 103 (the temperature of the molten glass 108 flowing in the outflow pipe 103). In this case, while detecting the temperature of the outflow tube 103 or the molten glass 108 with the thermocouple 109, a DC or AC voltage is applied to the outflow tube 103, and the viscosity of the glass 108 is controlled by the heat generation action of the outflow tube 103 itself. The flow of the glass 108 is adjusted.

【0004】後者の装置を図5を用いて説明する。この
装置は、流出管111を上側部分111aと下側部分1
11bとから構成し、上側部分に比して下側部分の電気
抵抗値を大きくして、流出管の下側部分の発熱量を大き
くすることができるようにしたものである。図5では、
流出管の肉厚は同じで、下側部分111bの内径を上側
部分111aの内径よりも若干小さくすることで、下側
部分の電気抵抗値を大きくしている。これにより、流出
管先端部116を露出させても、流出管先端部116の
温度を下げずにガラス流出ができるようになる。そし
て、流出管先端部116近傍に邪魔になる保温材がない
ため、流出管先端部116の下方直近にガラス流の切断
装置(図示していない)などを取付けることが容易にで
きるようになる。
The latter device will be described with reference to FIG. The device comprises an outlet pipe 111 which is connected to an upper part 111a and a lower part 1a.
11b, the electric resistance of the lower part is made larger than that of the upper part, and the calorific value of the lower part of the outflow pipe can be made larger. In FIG.
The thickness of the outflow pipe is the same, and the electrical resistance of the lower portion is increased by making the inner diameter of the lower portion 111b slightly smaller than the inner diameter of the upper portion 111a. Thus, even if the outflow pipe tip 116 is exposed, glass can be discharged without lowering the temperature of the outflow pipe tip 116. Since there is no heat insulating material in the vicinity of the outflow pipe tip 116, a glass flow cutting device (not shown) or the like can be easily attached immediately below the outflow pipe tip 116.

【0005】[0005]

【発明が解決しようとする課題】上記の装置は、流出管
内を流れるガラス(108や119)の温度をほとんど
タイムラグなしに検知し、流出管(103や111)の
温度を制御し、流量を調節することができるという点で
は、いずれも優れた装置である。
The above apparatus detects the temperature of the glass (108 or 119) flowing in the outflow pipe with almost no time lag, controls the temperature of the outflow pipe (103 or 111), and regulates the flow rate. Both are excellent devices in that they can do this.

【0006】しかしながら、このような従来の流量調節
装置を用いて溶融ガラスの流出を長期にわたって行なお
うとすると、次に述べる様な問題が発生することがわか
った。
However, it has been found that when the outflow of the molten glass is performed for a long time using such a conventional flow control device, the following problem occurs.

【0007】図4や図5で示される流量調節装置は、給
電端子(105、106、113、114)が流出管の
片側にのみ(図に向かって左側)に設置されている。こ
のような装置を使って、朝、温度を上げて溶融ガラスの
流出を開始し、夕方まで約6時間の間、同様の温度域で
流出を継続した後、夕方、温度を下げて流出を停止する
操作を、毎日繰返し実施した結果、例えば1ヶ月ほど経
過しただけで、流出管の中間部121、124は、それ
ぞれ図6、図7に示すように湾曲してしまった。実験を
更に継続すると、湾曲の程度は時間経過につれて少しず
つ進行して、3ヶ月後に保温材122、125を剥して
みると、流出管の中間部がつぶれかけているのがわかっ
た。また、流出管の先端部123、126の断面も、初
めは円形だったのが1ヶ月を過ぎる頃から楕円状につぶ
れてくることがわかった。
In the flow control devices shown in FIGS. 4 and 5, the power supply terminals (105, 106, 113, 114) are provided only on one side of the outflow pipe (left side in the figure). Using such a device, the temperature was raised in the morning to start the outflow of molten glass, and continued to flow in the same temperature range for about 6 hours until the evening, then lowered the temperature in the evening and stopped the outflow As a result of repeating this operation every day, the intermediate portions 121 and 124 of the outflow pipe were curved as shown in FIGS. When the experiment was further continued, the degree of bending progressed little by little with the passage of time, and when the heat insulating materials 122 and 125 were peeled off three months later, it was found that the middle part of the outflow pipe was crushed. Also, it was found that the cross-sections of the distal end portions 123 and 126 of the outflow pipes were initially circular, but collapsed into elliptical shapes after about one month.

【0008】このような、流出管の湾曲や流出管断面形
状のつぶれの結果、同じ温度設定のままではガラスの流
量が変化して、成形型等へ供給される溶融ガラス塊の重
量が一定しなかったり、流出管断面形状を反映して流出
ガラスの断面形状もつぶれてしまい、所望の形状の溶融
ガラス塊が得られなかったり、溶融ガラス塊に脈理が発
生するといった問題が発生した。脈理の発生の原因は定
かなことは明らかでないが、流出管の湾曲や断面形状の
つぶれの結果、流出管内や、流出管先端部から外に出る
所でガラスの流れが乱されるためと予想される。
As a result of the curvature of the outflow pipe and the collapse of the cross-sectional shape of the outflow pipe, the flow rate of the glass changes under the same temperature setting, and the weight of the molten glass lump supplied to the forming die or the like becomes constant. However, the cross-sectional shape of the outflow glass was crushed by reflecting the cross-sectional shape of the outflow pipe, and a problem occurred in that a molten glass lump having a desired shape could not be obtained, and striae occurred in the molten glass lump. It is not clear that the cause of the striae is unclear, but it is because the flow of glass is disturbed inside the outflow pipe and at the place where it exits from the tip of the outflow pipe as a result of the curvature of the outflow pipe and collapse of the cross-sectional shape. is expected.

【0009】従って、本発明は上述した課題に鑑みてな
されたものであり、その目的は、長期にわたって、重量
変動が小さく、形状が良好で、脈理のない光学的品質の
良好な溶融ガラス塊を成形型等へ供給することができる
溶融ガラスの流量調節装置を提供することである。
SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a molten glass ingot having a small weight variation, a good shape, and a good optical quality without striae over a long period of time. To provide a molten glass flow rate control device capable of supplying the molten glass to a molding die or the like.

【0010】[0010]

【課題を解決するための手段】上述した課題を解決し、
目的を達成するために、本発明に係わる溶融ガラスの流
量調節装置は、ガラス溶融槽の流出口に取付けられた白
金または白金合金製の流出管と、該流出管に直流または
交流電圧を印加するために該流出管に接続された白金ま
たは白金合金製の給電端子と、該給電端子に電力を供給
するための給電装置とを備え、前記給電端子の基端側に
金製の屈曲部を有する端子が接続され、該金製の端子
は、白金または白金合金製の前記給電端子に比べて、電
気的な抵抗は同等で、強度が小さいことを特徴としてい
る。
Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, a flow control device for molten glass according to the present invention includes a platinum or platinum alloy outflow pipe attached to an outflow port of a glass melting tank, and applies a DC or AC voltage to the outflow pipe. A power supply terminal made of platinum or a platinum alloy connected to the outflow pipe, and a power supply device for supplying power to the power supply terminal, and having a bent portion made of gold on a base end side of the power supply terminal. A terminal is connected, and the gold terminal is characterized in that it has the same electrical resistance and a lower strength than the power supply terminal made of platinum or a platinum alloy.

【0011】また、本発明に係わる溶融ガラスの流量調
節装置は、ガラス溶融槽の流出口に取付けられた白金ま
たは白金合金製の流出管と、該流出管に直流または交流
電圧を印加するために該流出管に接続された白金または
白金合金製の給電端子と、該給電端子に電力を供給する
ための給電装置とを備え、前記給電端子はガラスの流れ
る方向を軸として前記流出管の軸対称の位置に設置さ
れ、前記給電端子の基端側に金製の屈曲部を有する端子
が接続され、該金製の端子は、白金または白金合金製の
前記給電端子に比べて、電気的な抵抗は同等で、強度が
小さいことを特徴としている。
The apparatus for controlling the flow rate of molten glass according to the present invention comprises an outflow pipe made of platinum or a platinum alloy attached to an outflow port of a glass melting tank, and a DC or AC voltage applied to the outflow pipe. A power supply terminal made of platinum or a platinum alloy connected to the outflow tube, and a power supply device for supplying power to the power supply terminal, wherein the power supply terminal is axially symmetric with respect to the flowing direction of the glass. And a terminal having a bent portion made of gold is connected to the base end side of the power supply terminal. The gold terminal has an electric resistance lower than that of the power supply terminal made of platinum or a platinum alloy. Are equivalent and have low strength.

【0012】[0012]

【発明の実施の形態】以下、本発明の好適な実施形態に
ついて説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.

【0013】本発明の一実施形態の流量調節装置は、ガ
ラス溶融槽の流出口に取付けられた白金または白金合金
製の流出管と、この流出管を被覆する保温材と、流出管
に直流または交流電圧を印加するための、流出管に接続
された白金または白金合金製の給電端子と、給電装置
と、流出管の温度(流出管内を流れる溶融ガラスの温
度)を検知するための、流出管に溶接された熱電対とを
備えた溶融ガラスの流量調節装置において、給電端子の
基端側に金製の屈曲部を有する端子を接続し、金製の端
子は、白金または白金合金製の給電端子に比べて、電気
的な抵抗は同等以下で、強度を小さくしている。
[0013] In one embodiment of the present invention, there is provided a flow control device comprising an outflow pipe made of platinum or a platinum alloy attached to an outflow port of a glass melting tank, a heat insulating material covering the outflow pipe, and a direct current or direct current flowing through the outflow pipe. A power supply terminal made of platinum or a platinum alloy connected to the outflow pipe for applying an AC voltage, a power supply device, and an outflow pipe for detecting the temperature of the outflow pipe (the temperature of the molten glass flowing in the outflow pipe). In a flow control device for molten glass provided with a thermocouple welded to a terminal, a terminal having a bent portion made of gold is connected to the base end side of the power supply terminal, and the gold terminal is a power supply made of platinum or a platinum alloy. Compared to the terminals, the electrical resistance is equal to or less than that and the strength is reduced.

【0014】これにより、流出管の温度を上げ下げした
時に、熱膨張収縮に伴い流出管の長さが変化しても、給
電端子の基端側に接続した金製の端子が変形して、流出
管に力が加わるのを防止できるようになり、流出管の湾
曲や流出管断面形状がつぶれることを防止できる。
Thus, when the temperature of the outflow pipe is raised or lowered, even if the length of the outflow pipe changes due to thermal expansion and contraction, the gold terminal connected to the base end side of the power supply terminal is deformed, and the outflow occurs. It is possible to prevent the force from being applied to the pipe, and it is possible to prevent the outflow pipe from being curved or the outflow pipe from being collapsed in cross section.

【0015】また、本発明の他の実施形態の流量調節装
置は、ガラス溶融槽の流出口に取付けられた白金または
白金合金製の流出管と、この流出管を被覆する保温材
と、流出管に直流または交流電圧を印加するための、流
出管に接続された給電端子および給電装置と、流出管の
温度(流出管内を流れる溶融ガラスの温度)を検知する
ための、流出管に溶接された熱電対とを備えた溶融ガラ
スの流量調節装置において、給電端子はガラスの流れる
方向を軸として軸対称の位置に設置され、更に、給電端
子の基端側に金製の屈曲部を有する端子を接続し、金製
の端子は、白金または白金合金製の給電端子に比べて、
電気的な抵抗は同等以下で、強度を小さくしている。
A flow control device according to another embodiment of the present invention includes an outflow pipe made of platinum or a platinum alloy attached to an outflow port of a glass melting tank, a heat insulating material covering the outflow pipe, and an outflow pipe. A power supply terminal and a power supply device connected to the outflow pipe for applying a DC or AC voltage to the outflow pipe, and welded to the outflow pipe for detecting the temperature of the outflow pipe (the temperature of the molten glass flowing in the outflow pipe). In the molten glass flow rate control device provided with a thermocouple, the power supply terminal is installed at an axially symmetric position with respect to the flowing direction of the glass, and further, a terminal having a bent portion made of gold on the base end side of the power supply terminal. Connect the gold terminal, compared to the platinum or platinum alloy power supply terminal,
The electrical resistance is equal to or less than that, and the strength is reduced.

【0016】これにより、流出管の温度を比較的速く上
げ下げしても、熱膨張収縮に伴い流出管の長さが変化す
ることに応じて、給電端子の基端側に接続した金製の端
子が変形して、流出管に力が加わるのを防止できるよう
になり、流出管の湾曲や流出管断面形状がつぶれること
を防止できる。
Thus, even if the temperature of the outflow pipe rises and falls relatively quickly, the gold terminal connected to the base end of the power supply terminal responds to the change of the length of the outflow pipe due to thermal expansion and contraction. Is deformed to prevent the force from being applied to the outflow pipe, and it is possible to prevent the outflow pipe from being curved or the outflow pipe cross-sectional shape from being crushed.

【0017】以下、実施形態について具体的に説明す
る。
Hereinafter, embodiments will be specifically described.

【0018】(第1の実施形態)初めに、第1の実施形
態の溶融ガラスの流量調節装置の概要を図面を用いて説
明する。
First Embodiment First, an outline of a molten glass flow rate control device according to a first embodiment will be described with reference to the drawings.

【0019】図1は第1の実施形態の溶融ガラスの流量
調節装置を示す図であり、1はガラス溶融槽で底部の流
出口2に流出管3が取付けられている。溶融槽と流出管
はいずれも白金もしくは白金合金でできている。溶融槽
1は耐火物や断熱材で作られたガラス溶融炉4に設置さ
れていて、炉内雰囲気5をヒーター6で加熱して、溶融
槽内部の溶融ガラス7を溶融できるようになっている。
FIG. 1 is a view showing an apparatus for controlling the flow rate of molten glass according to a first embodiment, wherein 1 is a glass melting tank in which an outflow pipe 3 is attached to an outlet 2 at the bottom. Both the melting tank and the outflow pipe are made of platinum or a platinum alloy. The melting tank 1 is installed in a glass melting furnace 4 made of a refractory or a heat insulating material, and the furnace atmosphere 5 is heated by a heater 6 so that the molten glass 7 in the melting tank can be melted. .

【0020】ガラス溶融槽内の溶融ガラス7は、攪拌棒
8によって攪拌均質化して脈理のないガラスが流出でき
るようになっている。攪拌棒は溶融ガラス7に接触する
部分は白金もしくは白金合金でできている。
The molten glass 7 in the glass melting tank is stirred and homogenized by a stirring rod 8 so that glass without striae can flow out. The portion of the stirring rod that contacts the molten glass 7 is made of platinum or a platinum alloy.

【0021】図1の右側には、図示していないが、所定
の重量のガラス原料を投入するための装置が設置されて
いて、ガラス流出量に相当する重量のガラス原料を投入
することで、溶融ガラス液面9の高さを一定に保てるよ
うになっている。そして、必要に応じて、ガラスを連続
して溶融流出できるようになっている。
On the right side of FIG. 1, although not shown, a device for charging a predetermined weight of glass raw material is provided, and by inputting a glass raw material having a weight corresponding to the glass outflow amount, The height of the molten glass liquid surface 9 can be kept constant. Then, if necessary, the glass can be continuously melted and flown out.

【0022】流出管は保温材10で覆われている。流出
管には、流出管と同じ材質の白金もしくは白金合金でで
きた給電端子11、12が溶接されている。それぞれの
給電端子の基端部に、金で作られた板状の端子13,1
4が溶接されていて、いずれも、若干伸縮できるように
屈曲した形状をしている。更に、この金製の端子の先に
は給電用の電線15が接続され、給電装置16から電圧
が印加されるようになっている。また、17は流出管3
の温度(流出管内を流れる溶融ガラスの温度)を検知す
るための熱電対で、流出管3に溶接されている。
The outflow pipe is covered with a heat insulating material 10. Feeding terminals 11 and 12 made of platinum or a platinum alloy of the same material as the outflow tube are welded to the outflow tube. At the base end of each power supply terminal, a plate-like terminal 13, 1 made of gold is provided.
4 are welded, and each has a bent shape so that it can be slightly expanded and contracted. Further, a power supply wire 15 is connected to the end of the gold terminal, and a voltage is applied from a power supply device 16. 17 is the outflow pipe 3
(A temperature of the molten glass flowing in the outflow pipe) and is welded to the outflow pipe 3.

【0023】流出管先端部19の下方直近には、図示し
ていないが、例えば、流出ガラス20を一定時間受けて
溶融ガラス塊を得るための成形型が設置されている。
Although not shown, for example, a molding die for receiving the outflow glass 20 for a predetermined time to obtain a molten glass lump is installed immediately below the outflow tube tip portion 19.

【0024】以上説明した溶融ガラス流量調節装置は、
給電装置16によって流出管3に直流または交流電圧を
印加し、流出管自体のジュール熱による発熱作用により
ガラス18の温度(すなわち粘度に対応)を変化させ
て、溶融ガラスの流量調節を行なう。その際、熱電対1
7で流出管3の温度を検知しながら、流出管3の温度が
設定値になるように給電装置16の電圧を調整すること
により、管内の溶融ガラス18の流量を調節して安定化
させることができる。
The molten glass flow control device described above is
A DC or AC voltage is applied to the outflow pipe 3 by the power supply device 16, and the temperature of the glass 18 (that is, corresponding to the viscosity) is changed by the heat generated by the Joule heat of the outflow pipe itself, thereby adjusting the flow rate of the molten glass. At that time, thermocouple 1
Adjusting the flow rate of the molten glass 18 in the pipe by adjusting the voltage of the power supply device 16 so that the temperature of the outflow pipe 3 becomes a set value while detecting the temperature of the outflow pipe 3 at 7. Can be.

【0025】次に、具体的なガラス流出実験を試みた。
流出管3は肉厚1.5mm、内径6.0mm、長さ50
0mm(ガラス溶融槽の流出口2から流出管先端部19
までの長さ)で、白金で作られている。給電端子11、
12の材質も同様の白金で、肉厚2.0mm、巾20m
m、長さ50mm(図1において左右方向)の板状であ
る。流出管3の周囲には、厚さ12.5mmの耐熱性の
断熱ウールを巻付けることで、保温材10としている。
Next, a specific glass outflow experiment was attempted.
The outflow pipe 3 has a thickness of 1.5 mm, an inner diameter of 6.0 mm, and a length of 50 mm.
0 mm (from the outlet 2 of the glass melting tank to the outlet pipe tip 19
Length), made of platinum. Power supply terminal 11,
The material of No. 12 is the same platinum, thickness 2.0 mm, width 20 m
m, a plate shape having a length of 50 mm (in the left-right direction in FIG. 1). A heat insulating material 10 having a thickness of 12.5 mm is wound around the outflow pipe 3 to form a heat insulating material 10.

【0026】給電端子の基端部に、本実施形態の特徴で
ある金製の屈曲した板が端子13、14として溶接され
ている。金の端子は肉厚0.5mm、巾20mm、伸ば
した時の長さは60mmとした。金の端子は、その肉厚
が白金給電端子の1/4と薄いが、巾は同一なので、曲
げるのに要する力は白金給電端子よりかなり小さいこと
になる。断面積についても、金の端子は白金給電端子の
1/4となっている。金と白金の比抵抗は例えば20℃
で、白金の10.6×10-6Ωcmに対して、金では
2.2×10-6Ωcmと約1/5である。従って、金の
端子13、14と白金給電端子11、12とでは、単位
長さ当たりの両者の電気的な抵抗はほぼ同等か、若干、
金の端子の方が小さめであるから、通電時に金の端子が
異常に発熱することを防止できる。
At the base end of the power supply terminal, a bent plate made of gold, which is a feature of the present embodiment, is welded as terminals 13 and 14. The gold terminal had a thickness of 0.5 mm, a width of 20 mm, and a length of 60 mm when extended. The thickness of the gold terminal is as thin as 1/4 of that of the platinum power supply terminal, but since the width is the same, the force required for bending is considerably smaller than that of the platinum power supply terminal. As for the cross-sectional area, the gold terminal is 1 / of the platinum power supply terminal. The specific resistance of gold and platinum is, for example, 20 ° C.
In contrast to platinum, which is 10.6 × 10 -6 Ωcm, that of gold is 2.2 × 10 -6 Ωcm, which is about 1/5. Accordingly, the electrical resistance per unit length of the gold terminals 13 and 14 and the platinum power supply terminals 11 and 12 is substantially equal or slightly different.
Since the gold terminals are smaller, it is possible to prevent the gold terminals from abnormally generating heat when energized.

【0027】以上説明した装置を用いて重バリウムクラ
ウン系の光学ガラスの流出を試みた。このガラスは室温
の比重が3.3であり、 1300℃の時に101.5dPa・s 1200℃の時に101.6dPa・s 1100℃の時に101.8dPa・s 1000℃の時に102.2dPa・s 890℃の時に102.9dPa・s 610℃の時に107.6dPa・s 498℃の時に1013dPa・s となる粘度特性を持っている。このガラスを溶融槽1内
で溶融して1000℃に調整した。攪拌棒8は60rp
mで動かして溶融ガラス7が均質化されるようにした。
Using the apparatus described above, the outflow of heavy barium crown optical glass was attempted. The glass is a specific gravity at room temperature is 3.3, 1300 ℃ 10 1.5 dPa · s 1200 10 2.2 dPa · s 890 when 10 1.6 dPa · s 1100 ℃ when 10 1.8 dPa · s 1000 ℃ when ° C. When the It has a viscosity characteristic of 10 2.9 dPa · s at 610 ° C., 10 7.6 dPa · s at 610 ° C., and 10 13 dPa · s at 498 ° C. This glass was melted in the melting tank 1 and adjusted to 1000 ° C. The stirring rod 8 is 60 rpm
m so that the molten glass 7 was homogenized.

【0028】次いで、流出管3に通電加熱を行なった。
それには、熱電対17で流出管3の温度を検知しなが
ら、毎分100℃の昇温速度で、流出管3の温度が90
0℃になるように、給電装置16の電圧を調整した。こ
の時、温度の上昇に伴って流出管3の長さが熱膨張で長
くなるため、流出管先端部19の高さは下方に4〜5m
m低くなっていた。流出管の伸びに対応して、金製の端
子13、14、特に流出管先端部側の14が変形してい
たが、白金の給電端子11、12は共に変形は認められ
なかった。なお、この時の溶融ガラス流量は12g/分
だった。なお、熱電対17で測定される温度を、例えば
850〜1100℃まで変えることで、溶融ガラスの流
量を2〜40g/分の範囲で変えることができ、必要に
応じて流量を設定することができる。
Next, the outflow pipe 3 was heated by energization.
To do this, while detecting the temperature of the outflow pipe 3 with the thermocouple 17, the temperature of the outflow pipe 3 is raised at a rate of 100 ° C./min.
The voltage of the power supply device 16 was adjusted to be 0 ° C. At this time, since the length of the outflow pipe 3 becomes longer due to thermal expansion with an increase in temperature, the height of the outflow pipe tip 19 is lowered by 4 to 5 m.
m lower. Corresponding to the elongation of the outflow pipe, the gold terminals 13 and 14, particularly the 14 on the tip side of the outflow pipe, were deformed, but no deformation was observed in the platinum power supply terminals 11 and 12. The flow rate of the molten glass at this time was 12 g / min. By changing the temperature measured by the thermocouple 17 to, for example, 850 to 1100 ° C., the flow rate of the molten glass can be changed in a range of 2 to 40 g / min, and the flow rate can be set as necessary. it can.

【0029】次に、流出管先端部19の下方直近に設置
された成形型(図示していない)を用いて、10秒の
間、流出ガラス20を受けることで、2gの溶融ガラス
塊を得た。この動作を6時間連続して行なうと、1分当
たり6個、6時間では合計2160個程度の溶融ガラス
塊が得られた。重量については、ガラス塊の97%が2
gに対して±1%以内のバラツキに収まり、良好だっ
た。脈理は、重量の良否に関わらず全てのガラス塊につ
いて認められず、光学的品質も良好だった。真円度(直
径の径方向の違いによるバラツキ)も、やはり重量の良
否に関わらず全てのガラス塊について、直径の±1%以
内に収まり良好だった。
Next, the molten glass 20 is obtained by receiving the outflow glass 20 for 10 seconds by using a molding tool (not shown) installed immediately below the outflow pipe end portion 19. Was. When this operation was continuously performed for 6 hours, six molten glass blocks were obtained per minute, and about 6160 molten glass blocks were obtained in six hours. In terms of weight, 97% of the glass block is 2
g was within ± 1%, which was good. Striae were not observed in all the glass ingots regardless of the weight, and the optical quality was also good. The roundness (variation due to the difference in diameter in the radial direction) was also good within ± 1% of the diameter for all the glass blocks regardless of the weight.

【0030】次に、毎分100℃の降温速度で、流出管
3の温度が500℃以下になるまで温度を下げて、ガラ
スの流出を停止した。その後、更に室温(約20〜25
℃)まで流出管3の温度を下げた。
Next, the temperature was lowered at a rate of 100 ° C./min until the temperature of the outflow pipe 3 became 500 ° C. or less, and the outflow of glass was stopped. Then, further at room temperature (about 20-25
(° C.).

【0031】以上、流出管3の昇温(ガラス流出開
始)、約6時間のガラス流出、流出管の降温(流出停
止)の各工程について説明したが、実際の実験では、朝
に流出管を昇温してその後、6時間ガラスを流出してガ
ラス塊を得て、夕方、流出管の温度を下げて、ガラス流
出を停止した。この操作を約6ヶ月継続したが、その間
に作られたガラス塊は、そのほぼ95%が重量、脈理、
真円度ともに良好な品質を有していた。また、6ヶ月の
実験後に、保温材10を剥がして流出管3を調べてみた
が、ほとんど変形は認められなかった。
The steps of raising the temperature of the outflow pipe 3 (start of outflow of glass), outflow of glass for about 6 hours, and lowering of the temperature of the outflow pipe (stopping outflow) have been described above. After the temperature was raised, the glass flowed out for 6 hours to obtain a glass lump, and in the evening, the temperature of the outflow pipe was lowered to stop the outflow of the glass. This operation was continued for about six months, during which time approximately 95% of the glass mass was weight, striae,
It had good quality in both roundness. After the experiment for 6 months, the heat insulating material 10 was peeled off and the outflow pipe 3 was examined, but almost no deformation was observed.

【0032】なお、流出管3の昇温速度と降温速度は前
述のごとく100℃/分で行なったが、この速度が速く
なると、流出されたガラス品質の悪化や、流出管の変形
の進み方が速くなる傾向があった。第1の実施形態で使
用した装置の場合、少なくとも6ヶ月以上にわたって、
良好な品質のガラス塊が得られて流出管が変形しないた
めには、昇温速度と降温速度はいずれもおよそ毎分20
0℃以下であれば良いことがわかった。
The rate of temperature rise and fall of the outflow pipe 3 was set at 100 ° C./min as described above. However, if this rate is increased, the quality of the outflow glass deteriorates and the way the outflow pipe deforms is advanced. Tended to be faster. In the case of the device used in the first embodiment,
In order to obtain good quality glass lumps and not to deform the outflow tube, both the heating rate and the cooling rate should be about 20 min / min.
It was found that the temperature should be 0 ° C. or less.

【0033】(比較例1)ここで比較のため、従来の装
置で行なった実験結果を説明する。従来の装置は、図4
で示す装置を使用した。
(Comparative Example 1) Here, for comparison, the results of an experiment performed with a conventional apparatus will be described. The conventional device is shown in FIG.
The device shown in Table 1 was used.

【0034】この比較実験では、第1の実施形態で使用
した金の端子を用いないことを除けば、ガラスの種類、
流出管103と給電端子105、106の材質や寸法、
更に設定温度条件などはいずれも第1の実施形態と同じ
である。また、図4には示していないが、第1の実施形
態と同様に溶融ガラス110を攪拌均質化するための攪
拌棒や、ガラス原料投入装置が設置されている。
In this comparative experiment, except for not using the gold terminal used in the first embodiment, the type of glass and
Materials and dimensions of the outflow pipe 103 and the power supply terminals 105 and 106,
Further, the set temperature conditions and the like are all the same as in the first embodiment. Although not shown in FIG. 4, a stirrer for stirring and homogenizing the molten glass 110 and a glass raw material charging device are provided as in the first embodiment.

【0035】この場合、朝に流出管を100℃/分の昇
温速度で昇温してその後、6時間ガラスを流出してガラ
ス塊を得て、夕方、流出管の温度を100℃/分で下げ
てガラス流出を停止する操作を、第1の実施形態と同様
に毎日繰返し行なうと、初めの約半月間は、作られたガ
ラス塊は、そのほぼ90%以上が重量、脈理、真円度と
もに良好な品質を有していた。しかし、実験開始から約
1ヶ月ほど経過しただけで、流出管中間部121は、図
6に示すように湾曲してしまった。実験を更に継続する
と、湾曲の程度は時間経過につれて少しずつ進行して、
3ヶ月後に保温材122を剥してみると、流出管中間部
がつぶれかけていることがわかった。また、流出管先端
部123の断面も、初めは円形だったのが1ヶ月を過ぎ
る頃から楕円状につぶれてくることがわかった。
In this case, the outflow tube is heated at a rate of 100 ° C./min in the morning, and then the glass is discharged for 6 hours to obtain a glass lump. In the evening, the temperature of the outflow tube is increased to 100 ° C./min. When the operation of lowering and stopping the outflow of glass is repeated every day in the same manner as in the first embodiment, for the first half month, approximately 90% or more of the produced glass lump has weight, striae and trueness. It had good quality in both roundness. However, only about one month after the start of the experiment, the outflow pipe intermediate portion 121 was curved as shown in FIG. As the experiment continued, the degree of curvature gradually progressed over time,
Three months later, when the heat insulating material 122 was peeled off, it was found that the middle portion of the outflow pipe was almost crushed. Also, it was found that the cross section of the outflow pipe tip portion 123 was initially circular, but was crushed into an elliptical shape after about one month.

【0036】このような、流出管の湾曲や流出管断面形
状のつぶれの結果、実験開始から約半月より後では、同
じ温度設定のままではガラス流量が少なくなり始めて、
流出管103の温度を徐々に上げるか、流出ガラスを成
形型へ供給する時間を長くしていかないと、成形型上に
得られる溶融ガラス塊の重量が±1%の公差内に入ら
ず、この場合は2gより少なくなってしまった。
As a result of such curvature of the outflow pipe and collapse of the outflow pipe cross-section, after about half a month from the start of the experiment, the glass flow began to decrease under the same temperature setting.
Unless the temperature of the outflow pipe 103 is gradually increased or the time for supplying the outflow glass to the mold is not increased, the weight of the molten glass lump obtained on the mold does not fall within the tolerance of ± 1%, and this In that case, it was less than 2 g.

【0037】同様に、流出管の湾曲や流出管断面形状の
つぶれの結果、実験開始から約1ヶ月より後では、溶融
ガラス塊の真円度も悪化することがわかった。約3ヶ月
経過後は、ほとんどの溶融ガラス塊の真円度は直径の±
1%を超えるようになり、形状の良いものが事実上得ら
れなくなってしまった。
Similarly, as a result of the curvature of the outflow pipe and the collapse of the cross-sectional shape of the outflow pipe, it was found that the roundness of the molten glass lump deteriorated after about one month from the start of the experiment. After about 3 months, the roundness of most molten glass blocks is ±
It exceeded 1%, and a good-shaped thing could not be obtained practically.

【0038】脈理についても同様で、流出管の湾曲や流
出管断面形状のつぶれの結果、実験開始から約1ヶ月よ
り後では、溶融ガラス塊に脈理が認められた。
The same applies to the stria. As a result of the outflow pipe bending and the collapse of the outflow pipe cross-section, stria was observed in the molten glass lump after about one month from the start of the experiment.

【0039】以上説明したように、白金の給電端子1
1、12よりも、その基端の金の端子13、14の電気
的な抵抗は同等以下にしておいて、強度を小さくするこ
とで、流出管3の温度を上げ下げした時に、熱膨張収縮
に伴い流出管の長さが変化しても、金製の端子が変形し
て、流出管に力が加わるのを防止できるようになる。
As described above, the platinum power supply terminal 1
The electrical resistance of the gold terminals 13 and 14 at the base end is set to be equal to or less than 1 and 12, and by reducing the strength, when the temperature of the outflow pipe 3 is raised or lowered, the thermal expansion and contraction is reduced. Accordingly, even if the length of the outflow tube changes, the gold terminal is deformed, so that it is possible to prevent the force from being applied to the outflow tube.

【0040】この結果、流出管温度の上げ下げを繰返し
ても、長期にわたって、重量変動が小さく、形状が良好
で、脈理のない光学的品質の良好な溶融ガラス塊を成形
型等へ供給するための溶融ガラスの流量調節装置を提供
できるようになる。
As a result, even if the temperature of the outlet pipe is repeatedly raised and lowered, the molten glass ingot having a small weight fluctuation, a good shape, and a good optical quality without striae can be supplied to a molding die or the like over a long period of time. Can be provided.

【0041】以上の説明のなかで、流出管の取付け方
は、ガラス溶融槽の底部に取付けて鉛直下方を向いてい
るが、これ以外にも、溶融槽の側面に取付けたり、その
方向が水平方向や斜め下向きであったり、更に、予め所
定の屈曲を与えてあっても差し支えない。また、必要に
応じて、給電装置を複数用意して、流出管を複数のゾー
ンに分けて通電加熱する構成でも差し支えない。この場
合には、白金または白金合金製の給電端子の基端には、
それぞれ金製の屈曲させた端子を接続してあれば、第1
の実施形態と同様の効果が得られることは言うまでもな
い。また、流出管の設定温度は第1の実施形態の条件に
限るものではなく、使用するガラス材料や所望のガラス
塊の重量などに合せて条件を適宜変更することができ
る。
In the above description, the outflow pipe is attached to the bottom of the glass melting tank so as to face vertically downward. Alternatively, the outflow pipe may be attached to the side surface of the melting tank or the direction may be horizontal. It does not matter if it is directed in the direction or obliquely downward, or is given a predetermined bend in advance. In addition, a configuration in which a plurality of power supply devices are prepared as necessary and the outflow pipe is divided into a plurality of zones and energized and heated may be used. In this case, at the base end of the power supply terminal made of platinum or platinum alloy,
If the gold bent terminals are connected, the first
Needless to say, the same effects as those of the embodiment can be obtained. Further, the set temperature of the outflow pipe is not limited to the condition of the first embodiment, and the condition can be appropriately changed according to the glass material used, the desired weight of the glass lump, and the like.

【0042】(第2の実施形態)次に、本発明の第2の
実施形態を図2を参照して説明する。第2の実施形態の
装置は基本的には第1の実施形態と同じものであるが、
流出管の形状が異なっている。第2の実施形態では、流
出管31を上側部分31aと下側部分31bとから構成
し、上側部分に比して下側部分の電気抵抗値を大きくし
て、流出管の下側部分の発熱量を大きくすることができ
るようにしている。これにより、流出管先端部32を露
出させても、流出管先端部の温度を下げずにガラス流出
ができるようになっている。流出管の肉厚は第1の実施
形態と同じで1.5mmであり、上側部分31aの内径
は6.0mm、下側部分31bの内径は4.0mmとし
ている。また、上側部分31aの長さは300mm、下
側部分31bの長さは200mmで、流出管全体の長さ
は500mmである。流出管31の材質は第1の実施形
態と同じで白金でできている。
(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The device of the second embodiment is basically the same as that of the first embodiment,
Outflow pipe shape is different. In the second embodiment, the outflow pipe 31 is composed of an upper part 31a and a lower part 31b, and the electric resistance of the lower part is made larger than that of the upper part, so that the lower part of the outflow pipe generates heat. The amount can be increased. Thereby, even if the outflow pipe tip 32 is exposed, the glass can flow out without lowering the temperature of the outflow pipe tip. The thickness of the outflow pipe is 1.5 mm as in the first embodiment, the inner diameter of the upper part 31a is 6.0 mm, and the inner diameter of the lower part 31b is 4.0 mm. The length of the upper part 31a is 300 mm, the length of the lower part 31b is 200 mm, and the length of the entire outflow pipe is 500 mm. The material of the outflow pipe 31 is the same as that of the first embodiment, and is made of platinum.

【0043】給電端子33、34の材質も同様に白金
で、肉厚2.4mm、巾16mm、長さ70mm(図2
において左右方向)の板状である。流出管31の周囲に
は、厚さ12.5mmの耐熱性の断熱ウールを巻付ける
ことで、保温材35としている。
The material of the power supply terminals 33 and 34 is also platinum, 2.4 mm in thickness, 16 mm in width, and 70 mm in length (FIG. 2).
In the left-right direction). A heat insulating material 35 having a thickness of 12.5 mm is wound around the outflow pipe 31 to form a heat insulating material 35.

【0044】この基端部に、金製の屈曲した板が端子3
6、37として溶接されている。金の端子は肉厚0.6
mm、巾16mm、伸ばした時の長さは80mmとし
た。金の端子は、その肉厚が白金給電端子の1/4で、
巾は同一なので、第1の実施形態と同様の設定になって
いる。このため、白金の給電端子33、34よりもその
基端の金の端子36、37は、電気的な抵抗は同等以下
で、強度が小さくなっている。
At the base end, a bent plate made of gold
6, 37 are welded. Gold terminals are 0.6 thick
mm, the width was 16 mm, and the length when extended was 80 mm. The gold terminal has a thickness of 1/4 of the platinum power supply terminal.
Since the widths are the same, the settings are the same as in the first embodiment. For this reason, the gold terminals 36 and 37 at the base end of the platinum power supply terminals 33 and 34 have an electric resistance equal to or less than that and have a small strength.

【0045】以上説明した装置を用いて、第1の実施形
態と同じ重バリウムクラウン系の光学ガラスの流出を試
みた。溶融槽38内のガラス温度(1000℃)と、攪
拌棒41の回転数(60rpm)は第1の実施形態と同
じである。
Using the apparatus described above, the outflow of the same heavy barium crown-based optical glass as in the first embodiment was attempted. The temperature of the glass in the melting tank 38 (1000 ° C.) and the number of rotations of the stirring rod 41 (60 rpm) are the same as in the first embodiment.

【0046】流出実験は次の様にした。熱電対44で流
出管31の温度を検知しながら、毎分150℃の昇温速
度で、流出管31の温度が950℃になるように、給電
装置48の電圧を調整した。この時、流出管の下側部分
31bの温度は熱電対45で測定できるが、955℃と
なっており、上側部分31aより低くなることはなくほ
ぼ同等の温度だった。この時、流出管31の長さが熱膨
張で長くなり、流出管先端部32の高さは下方に約5m
m低くなっていた。流出管の伸びに対応して、金製の端
子36と37が変形していたが、白金の給電端子33、
34には共に変形は認められなかった。なお、この時の
溶融ガラス流量は8g/分だった。なお、熱電対44で
測定される温度を変えることで、溶融ガラスの流量を変
えることができ、必要に応じて流量を設定することがで
きるのは、第1の実施形態と同様である。
The outflow experiment was performed as follows. While detecting the temperature of the outflow pipe 31 with the thermocouple 44, the voltage of the power supply device 48 was adjusted at a heating rate of 150 ° C. per minute so that the temperature of the outflow pipe 31 became 950 ° C. At this time, although the temperature of the lower portion 31b of the outflow pipe can be measured by the thermocouple 45, it was 955 ° C., and was not lower than that of the upper portion 31a and was almost the same temperature. At this time, the length of the outflow pipe 31 becomes longer due to thermal expansion, and the height of the outflow pipe tip 32 is lowered by about 5 m.
m lower. The gold terminals 36 and 37 were deformed in response to the elongation of the outflow pipe.
No deformation was observed in both samples. The molten glass flow rate at this time was 8 g / min. It is to be noted that the flow rate of the molten glass can be changed by changing the temperature measured by the thermocouple 44, and the flow rate can be set as required, as in the first embodiment.

【0047】次に、流出管先端部32の下方直近に設置
した成形型(図示していない)を用いて、12秒の間、
流出ガラス47を受けることで、1.6gの溶融ガラス
塊を得た。この動作を6時間連続して行なうと、1分当
たり5個、6時間では合計1800個程度の溶融ガラス
塊が得られた。重量については、ガラス塊の94%が
1.6gに対して±1%以内のバラツキに収まり、良好
だった。脈理は全てのガラス塊について認められず、真
円度(直径の径方向の違いによるバラツキ)も、やはり
全てのガラス塊について、直径の±1%以内に収まり良
好だった。
Next, using a mold (not shown) installed immediately below the outlet pipe tip 32, for 12 seconds,
By receiving the outflow glass 47, 1.6 g of molten glass lump was obtained. When this operation was continuously performed for 6 hours, 5 molten glass blocks were obtained per minute, and about 1800 molten glass blocks were obtained in 6 hours. With respect to the weight, 94% of the glass block was within ± 1% of 1.6 g, which was good. Striae were not observed in all the glass lumps, and the roundness (variation due to the difference in the diameter in the radial direction) was also good for all the glass lumps within ± 1% of the diameter.

【0048】次に、毎分150℃の降温速度で、流出管
31の温度が500℃以下になるまで温度を下げて、ガ
ラスの流出を停止した。その後、更に室温(約20〜2
5℃)まで流出管31の温度を下げた。
Next, the temperature was lowered at a rate of 150 ° C./min until the temperature of the outflow pipe 31 became 500 ° C. or less, and the outflow of glass was stopped. Then, at room temperature (about 20-2
(5 ° C.).

【0049】以上の各工程について、実際の実験では、
朝に流出管を昇温してその後、6時間ガラスを流出して
ガラス塊を得て、夕方、流出管の温度を下げて、ガラス
流出を停止した。この操作を約6ヶ月継続したが、その
間に作られたガラス塊は、そのほぼ93%が重量、脈
理、真円度ともに良好な品質を有していた。また、6ヶ
月の実験後に、保温材35を剥がして流出管31を調べ
てみたが、ほとんど変形は認められなかった。
For each of the above steps, in an actual experiment,
The temperature of the outflow tube was increased in the morning, and then the glass was allowed to flow out for 6 hours to obtain a glass lump. In the evening, the temperature of the outflow tube was lowered to stop the outflow of the glass. This operation was continued for about 6 months, during which time about 93% of the glass lump had good quality in weight, striae, and roundness. After the experiment for 6 months, the heat insulating material 35 was peeled off and the outflow pipe 31 was examined, but almost no deformation was observed.

【0050】(第3の実施形態)本発明の第3の実施形
態を図3を参照して説明する。第3の実施形態の装置の
構成は、ガラス溶融炉51、ガラス溶融槽52、攪拌棒
53、ヒーター54については、基本的に第1の実施形
態と同様である。また、ガラス溶融槽の流出口55に流
出管56を取付けることや、図示していないがガラス原
料の投入装置等を設置して、溶融ガラス液面57の高さ
を一定に保つことができるのも第1の実施形態と同様で
ある。
(Third Embodiment) A third embodiment of the present invention will be described with reference to FIG. The configuration of the apparatus of the third embodiment is basically the same as that of the first embodiment with respect to a glass melting furnace 51, a glass melting tank 52, a stirring rod 53, and a heater 54. In addition, it is possible to keep the height of the molten glass liquid level 57 constant by attaching an outflow pipe 56 to the outflow port 55 of the glass melting tank or installing a glass raw material charging device (not shown). Is the same as in the first embodiment.

【0051】第3の実施形態では、図3で示すように、
流出管56の左右対称の位置に、給電端子58、59と
60、61とを設けたことが特徴である。すなわち、給
電端子はガラスの流れる方向を軸として軸対称の位置に
一対ずつ設置したことになる。また、流出口55に近い
方の給電端子58、59は、流出管56の付け根付近に
溶接されていて、図3で示すように炉壁62内で折り曲
げられて、ガラス溶融炉51の底面の外側まで引き出さ
れるようになっている。また、もう一対の給電端子6
0、61は、流出管先端部71に溶接されていて、図3
に示すように左右対称で水平方向を向いている。
In the third embodiment, as shown in FIG.
Power supply terminals 58, 59 and 60, 61 are provided at symmetrical positions of the outflow pipe 56. In other words, a pair of power supply terminals are provided at axially symmetric positions with respect to the flowing direction of the glass. The power supply terminals 58 and 59 closer to the outlet 55 are welded near the base of the outflow pipe 56 and are bent in the furnace wall 62 as shown in FIG. It is designed to be pulled out to the outside. Another pair of power supply terminals 6
0 and 61 are welded to the outflow pipe tip 71, and FIG.
As shown in FIG.

【0052】第3の実施形態で用いた流出管や給電端子
58、59、60、61の材質はいずれも白金90%−
ロジウム10%(Pt−Rh10%)の白金合金を使用
した。この材料の強度(引張り強さ)は、白金にロジウ
ムを添加する前より、約2倍ほどの強さに強くなってい
る。
The material of the outflow pipe and the power supply terminals 58, 59, 60, 61 used in the third embodiment are all 90% platinum.
A platinum alloy of rhodium 10% (Pt-Rh 10%) was used. The strength (tensile strength) of this material is about twice as strong as before adding rhodium to platinum.

【0053】流出管56は肉厚1.0mm、内径3.0
mm、長さ800mmとなっていて、ガラス溶融槽の流
出口55から流出管先端部71まで同じ太さとなってい
る。流出管56の周囲には、厚さ12.5mmの耐熱性
の断熱ウールを巻付けることで、保温材63としてい
る。給電端子58、59は、肉厚1.4mm、巾10m
m、全長120mm(図3においてクランク状に折り曲
げられているので、それを伸ばした時の長さ)の板状で
ある。もう一対の給電端子60、61は、肉厚1.4m
m、巾10mm、全長50mmである。
The outflow pipe 56 has a thickness of 1.0 mm and an inner diameter of 3.0.
mm and a length of 800 mm, and have the same thickness from the outlet 55 of the glass melting tank to the tip 71 of the outlet pipe. A heat insulating material 63 having a thickness of 12.5 mm is wound around the outflow pipe 56 to form a heat insulating material 63. The power supply terminals 58 and 59 have a thickness of 1.4 mm and a width of 10 m.
m, 120 mm in length (because it is bent in a crank shape in FIG. 3, the length when it is extended) is a plate shape. The other pair of power supply terminals 60 and 61 has a thickness of 1.4 m.
m, width 10 mm, total length 50 mm.

【0054】次に、給電端子の基端側には金製の屈曲部
を有する端子64、65、66、67が接続されてい
る。第3の実施形態では、金製の端子は白金合金で作ら
れた給電端子に比べて、電気的な抵抗が小さめで、強度
も小さくなるように作られている。具体的な寸法を説明
すると、金製の端子は4枚とも、肉厚0.2mm、巾1
0mm、伸ばした時の長さは100mmとした。金の端
子は、その肉厚が白金合金の給電端子の1/7と薄い
が、巾は同一なので、曲げるのに要する力は給電端子よ
りかなり小さいことになる。断面積についても金の端子
は給電端子の1/7となっている。比抵抗を比較すると
例えば20℃で、Pt−Rh10%の19.2×10-6
Ωcmに対して、金では2.2×10-6Ωcmと約1/
8.7である。従って、単位長さ当たりの両者の電気的
な抵抗は金の端子の方が小さめとなっており、通電時に
金の端子が異常に発熱することを防止できる。
Next, terminals 64, 65, 66, and 67 having a bent portion made of gold are connected to the base end side of the power supply terminal. In the third embodiment, the gold terminal is made to have a lower electrical resistance and a lower strength than the power supply terminal made of a platinum alloy. To explain the specific dimensions, all four gold terminals have a thickness of 0.2 mm and a width of 1
0 mm, and the length when extended was 100 mm. The thickness of the gold terminal is as thin as 1/7 that of the platinum alloy power supply terminal, but since the width is the same, the force required for bending is considerably smaller than that of the power supply terminal. Regarding the cross-sectional area, the gold terminal is 1/7 of the power supply terminal. Comparing the specific resistance, for example, at 20 ° C., 19.2 × 10 −6 of Pt-Rh 10%
For gold, 2.2 × 10 -6 Ωcm is about 1 /
8.7. Accordingly, the electrical resistance of the gold terminal per unit length is smaller for the gold terminal, and it is possible to prevent the gold terminal from abnormally generating heat when energized.

【0055】以上説明した装置を用いてホウ酸ランタン
系の光学ガラスの流出を試みた。このガラスは室温の比
重が3.8であり、 1100℃の時に100.3dPa・s 1000℃の時に101.0dPa・s 890℃の時に102.8dPa・s 817℃の時に103.0dPa・s 764℃の時に104.0dPa・s 654℃の時に107.6dPa・s 579℃の時に1013dPa・s となる粘度特性を持っている。このガラスを溶融槽52
内で溶融して1100℃に調整した。攪拌棒53は10
0rpmで動かして溶融ガラス68が均質化されるよう
にした。
An outflow of lanthanum borate-based optical glass was attempted using the apparatus described above. The glass is a specific gravity at room temperature is 3.8, 1100 ℃ 10 0.3 dPa · s 1000 10 when 10 1.0 10 2.8 dPa · s 817 ℃ when dPa · s 890 ° C. When the ℃ 3.0 dPa · s 764 when It has a viscosity characteristic of 10 4.0 dPa · s at 654 ° C., 10 7.6 dPa · s at 654 ° C., and 10 13 dPa · s at 579 ° C. This glass is melted in a melting tank 52
The temperature was adjusted to 1100 ° C. by melting. The stirring rod 53 is 10
It was moved at 0 rpm so that the molten glass 68 was homogenized.

【0056】流出実験は次の様にした。熱電対69で流
出管56の温度を検知しながら、毎分100℃の昇温速
度で、流出管56の温度が1000℃になるように、給
電装置70の電圧を調整した。この時、流出管56の長
さが熱膨張で長くなり、流出管先端部71の高さは下方
に約8mm低くなっていた。流出管の伸びに対応して、
金製の端子64、65、66、67とが変形していた
が、白金の給電端子58、59、60、61には変形は
認められなかった。なお、この時の溶融ガラス流量は2
1g/分だった。なお、他の実施形態と同様、熱電対6
9で測定される温度を変えることで、溶融ガラスの流量
を変えることができる。
The effluent experiment was performed as follows. While detecting the temperature of the outflow pipe 56 with the thermocouple 69, the voltage of the power supply device 70 was adjusted at a heating rate of 100 ° C. per minute so that the temperature of the outflow pipe 56 became 1000 ° C. At this time, the length of the outflow pipe 56 was increased due to thermal expansion, and the height of the outflow pipe tip 71 was reduced by about 8 mm downward. In response to the outflow pipe elongation,
The gold terminals 64, 65, 66, and 67 were deformed, but the platinum power supply terminals 58, 59, 60, and 61 were not deformed. The molten glass flow rate at this time was 2
It was 1 g / min. Note that, similarly to the other embodiments, the thermocouple 6
By changing the temperature measured at 9, the flow rate of the molten glass can be changed.

【0057】次に、流出管先端部71の下方直近に設置
された成形型(図示していない)を用いて、5.6秒の
間、流出ガラス72を受けることで、1.96gの溶融
ガラス塊を得た。この動作を6時間連続して行なうと、
6時間では合計約3800個程度の溶融ガラス塊が得ら
れた。重量については、ガラス塊の95%が1.96g
に対して±1%以内のバラツキに収まり、良好だった。
脈理は全てのガラス塊について認められず、真円度(直
径の径方向の違いによるバラツキ)も、やはり全てのガ
ラス塊について、直径の±1%以内に収まり良好だっ
た。
Next, by using a mold (not shown) installed immediately below the outlet pipe tip 71, the outflow glass 72 is received for 5.6 seconds to melt 1.96 g. A glass mass was obtained. If this operation is performed continuously for 6 hours,
In 6 hours, about 3800 molten glass ingots were obtained in total. In terms of weight, 95% of the glass block is 1.96 g
The variation was within ± 1%, which was good.
Striae were not observed in all the glass lumps, and the roundness (variation due to the difference in the diameter in the radial direction) was also good for all the glass lumps within ± 1% of the diameter.

【0058】次に、毎分100℃の降温速度で、流出管
56の温度が580℃以下になるまで温度を下げて、ガ
ラスの流出を停止した。その後、更に室温(約20〜2
5℃)まで流出管56の温度を下げた。
Next, the temperature was lowered at a rate of 100 ° C./min until the temperature of the outflow pipe 56 became 580 ° C. or less, and the outflow of glass was stopped. Then, at room temperature (about 20-2
(5 ° C.).

【0059】以上の各工程について、実際の実験では、
朝に流出管を昇温してその後、6時間ガラスを流出して
ガラス塊を得て、夕方、流出管の温度を下げて、ガラス
流出を停止した。この操作を約6ヶ月継続したが、その
間に作られたガラス塊は、そのほぼ92%が重量、脈
理、真円度ともに良好な品質を有していた。また、6ヶ
月の実験後に、保温材63を剥がして流出管56を調べ
てみたが、ほとんど変形は認められなかった。
For each of the above steps, in an actual experiment,
The temperature of the outflow tube was increased in the morning, and then the glass was allowed to flow out for 6 hours to obtain a glass lump. In the evening, the temperature of the outflow tube was lowered to stop the outflow of the glass. This operation was continued for about 6 months, during which time about 92% of the glass lump had good quality in weight, striae, and roundness. After the experiment for 6 months, the heat insulating material 63 was peeled off and the outflow pipe 56 was examined, but almost no deformation was observed.

【0060】次に、流出管56の昇温速度と降温速度を
変える実験を行なった。流出管56の昇温速度と降温速
度は前述の実験では100℃/分で行なったが、これを
昇温、降温いずれの速度も、200℃/分、400℃/
分、600℃/分に速くする実験を試みた。
Next, an experiment was performed in which the heating rate and the cooling rate of the outlet pipe 56 were changed. The rate of temperature rise and fall of the outlet pipe 56 was set at 100 ° C./min in the above-mentioned experiment, but the rate of temperature rise and fall was 200 ° C./min and 400 ° C./min.
An experiment was conducted to increase the speed to 600 ° C./min.

【0061】この結果、第3の実施形態で使用した装置
の場合、少なくとも6ヶ月以上にわたって、良好な品質
のガラス塊が得られて流出管が変形しないためには、昇
温速度と降温速度はいずれも400℃/分以下であれば
良いことがわかった。600℃/分の場合は、実験開始
から約1ヶ月を経過すると、流出管が湾曲し始めてガラ
ス流量が変化してしまい、一定時間成形型で受けて得ら
れるガラス塊の重量が変動したり、ガラス塊の真円度の
悪化や脈理の発生がみられるようになった。
As a result, in the case of the apparatus used in the third embodiment, in order to obtain a good quality glass lump and not to deform the outflow pipe for at least 6 months or more, the heating rate and the cooling rate are set to be equal. In any case, it was found that 400 ° C./min or less was sufficient. In the case of 600 ° C./min, after about one month from the start of the experiment, the outflow pipe starts to bend and the flow rate of the glass changes, and the weight of the glass lump obtained in the molding die for a certain period of time fluctuates. Deterioration of roundness and striae of glass ingots have been observed.

【0062】また、第3の実施形態で使用した装置、す
なわち給電端子を設置するにあたって、流出管に対して
軸対称の位置(ガラスの流れる方向を軸とする)に一対
ずつ設置した装置は、第1及び第2の実施形態で使用し
た装置、すなわち給電端子を流出管の片側にだけ設置し
た装置に比べて、流出管の昇温や降温速度を速くするこ
とができることになる。その一方で、第3の実施形態で
使用した装置は、給電端子を数多く設置するのでその分
白金あるいは白金合金の量が必要となる。このため、第
3の実施形態のタイプか、第1及び第2の実施形態のタ
イプかは、状況に応じて選択すればよい。
The apparatus used in the third embodiment, that is, the apparatus in which a pair of power supply terminals are installed at a position axially symmetrical with respect to the outflow pipe (with the glass flowing direction as an axis) when installing the power supply terminal, As compared with the device used in the first and second embodiments, that is, the device in which the power supply terminal is provided only on one side of the outflow pipe, the temperature of the outflow pipe can be raised or lowered at a higher temperature. On the other hand, in the device used in the third embodiment, a large number of power supply terminals are provided, and accordingly, an amount of platinum or a platinum alloy is required. Therefore, the type of the third embodiment or the types of the first and second embodiments may be selected according to the situation.

【0063】(比較例2)ここで比較のため、金製の端
子を用いない従来の装置(図示しない)で比較実験を行
なった。この実験では、金製の端子を用いないことを除
けば、装置の構成や寸法、ガラスの種類、流出管の設定
温度条件などはいずれも第3の実施形態と同じである。
この場合、朝に流出管を100℃/分の昇温速度で昇温
してその後、6時間ガラスを流出してガラス塊を得て、
夕方、流出管の温度を100℃/分で下げてガラス流出
を停止する操作を、第3の実施形態と同様に毎日繰返し
行なうと、やはり約1ヶ月ほど経過しただけで、流出管
が湾曲し始めてガラス流量が変化してしまい、−定時間
成形型で受けて得られるガラス塊の重量変動、真円度の
悪化、脈理の発生がみられるようになった。
Comparative Example 2 For comparison, a comparative experiment was performed using a conventional device (not shown) not using a gold terminal. In this experiment, the configuration and dimensions of the apparatus, the type of glass, the set temperature conditions of the outflow pipe, and the like are all the same as those of the third embodiment except that the gold terminals are not used.
In this case, the outflow tube was heated at a rate of 100 ° C./min in the morning, and then the glass was discharged for 6 hours to obtain a glass lump,
In the evening, if the operation of lowering the temperature of the outflow pipe at 100 ° C./min and stopping the outflow of the glass is repeated every day in the same manner as in the third embodiment, the outflow pipe will bend after only about one month has elapsed. For the first time, the glass flow rate changed, and-the weight fluctuation of the glass lump obtained by the fixed-time molding die, the deterioration of roundness, and the occurrence of striae were observed.

【0064】以上説明したように、白金または白金合金
製の給電端子を設置するにあたって、流出管に対して軸
対称の位置(ガラスの流れる方向を軸とする)に設置し
て、更に、給電端子の基端側に接続した金製の端子は、
屈曲部を有すると同時に、白金または白金合金製の給電
端子に比べて、電気的な抵抗は同等以下で強度を小さく
した。この結果、流出管の温度を比較的速く上げ下げし
ても、熱膨張収縮で流出管の長さが変化することに応じ
て金製の端子が変形することで、流出管に力が加わるの
を防止できるようになる。このため、流出管温度を比較
的速く上げ下げすることを繰返しても、流出管の湾曲や
流出管断面形状がつぶれないようになる。
As described above, when the power supply terminal made of platinum or a platinum alloy is installed, the power supply terminal is installed at an axially symmetrical position with respect to the outflow pipe (the direction in which the glass flows is the axis). The gold terminal connected to the base end of
At the same time as having the bent portion, the electric resistance was equal to or less than that of the power supply terminal made of platinum or a platinum alloy, and the strength was reduced. As a result, even if the temperature of the outflow pipe is raised and lowered relatively quickly, the force applied to the outflow pipe is reduced by deforming the gold terminal in accordance with the change in the length of the outflow pipe due to thermal expansion and contraction. Can be prevented. Therefore, even if the temperature of the outflow pipe is raised and lowered relatively quickly, the outflow pipe does not bend or the outflow pipe cross-section does not collapse.

【0065】この結果、流出管の温度を比較的速く上げ
下げしても、長期にわたって、重量変動が小さく、形状
が良好で、脈理のない光学的品質の良好な溶融ガラス塊
を成形型等へ供給するための溶融ガラスの流量調節装置
を提供できるようになる。
As a result, even if the temperature of the outflow pipe is raised and lowered relatively quickly, the molten glass ingot having a small weight fluctuation, a good shape, and a good optical quality without striae over a long period of time into a molding die or the like. It becomes possible to provide a molten glass flow rate adjusting device for supplying.

【0066】以上説明したように、上記の実施形態によ
れば、 (1)白金または白金合金製の溶融ガラス流出管に白金
または白金合金製の給電端子を接続して、更に、給電端
子の基端側に金製の端子を接続した。金製の端子は屈曲
部を有すると同時に、白金または白金合金製の給電端子
に比べて、電気的な抵抗は同等以下で強度を小さくし
た。この結果、流出管の温度を上げ下げして熱膨張収縮
で流出管の長さが変化しても、金製の端子が変形するこ
とで流出管に力が加わるのを防止できるようになる。こ
のため、流出管温度の上げ下げを繰返しても、流出管の
湾曲や流出管断面形状がつぶれないようになる。
As described above, according to the above embodiment, (1) a platinum or platinum alloy power supply terminal is connected to a molten glass outflow pipe made of platinum or a platinum alloy, and Gold terminals were connected to the ends. At the same time as the gold terminal has the bent portion, the electric resistance is equal to or less than that of the power supply terminal made of platinum or platinum alloy, and the strength is reduced. As a result, even if the temperature of the outflow pipe is raised or lowered and the length of the outflow pipe changes due to thermal expansion / contraction, it is possible to prevent the force from being applied to the outflow pipe due to the deformation of the gold terminal. Therefore, even if the temperature of the outflow pipe is repeatedly raised and lowered, the outflow pipe does not become curved or the outflow pipe cross-sectional shape does not collapse.

【0067】この結果、長期にわたって、重量変動が小
さく、形状が良好で、脈理のない光学的品質の良好な溶
融ガラス塊を成形型等へ供給するための溶融ガラスの流
量調節装置を提供できるようになる。 (2)白金または白金合金製の溶融ガラス流出管に、白
金または白金合金製の給電端子を、ガラスの流れる方向
を軸として軸対称の位置に設置して、更に、給電端子の
基端側に金製の端子を接続した。金製の端子は屈曲部を
有すると同時に、白金または白金合金製の給電端子に比
べて、電気的な抵抗は同等以下で強度を小さくした。こ
の結果、流出管の温度を比較的速く上げ下げして熱膨張
収縮で流出管の長さが変化しても、金製の端子が変形す
ることで流出管に力が加わるのを防止できるようにな
る。このため、流出管温度を比較的速く上げ下げするこ
とを繰返しても、流出管の湾曲や流出管断面形状がつぶ
れないようになる。
As a result, it is possible to provide a molten glass flow rate adjusting device for supplying a molten glass lump having a small weight variation, a good shape, and a good optical quality without striae to a molding die or the like over a long period of time. Become (2) A power supply terminal made of platinum or a platinum alloy is installed in a molten glass outflow pipe made of platinum or a platinum alloy at an axially symmetric position with respect to the flowing direction of glass as an axis. Gold terminals were connected. At the same time as the gold terminal has the bent portion, the electric resistance is equal to or less than that of the power supply terminal made of platinum or platinum alloy, and the strength is reduced. As a result, even if the temperature of the outflow pipe is raised and lowered relatively quickly and the length of the outflow pipe changes due to thermal expansion and contraction, it is possible to prevent the force from being applied to the outflow pipe by deforming the gold terminal. Become. Therefore, even if the temperature of the outflow pipe is raised and lowered relatively quickly, the outflow pipe does not bend or the outflow pipe cross-section does not collapse.

【0068】この結果、流出管の温度を比較的速く上げ
下げしても、長期にわたって、重量変動が小さく、形状
が良好で、脈理のない光学的品質の良好な溶融ガラス塊
を成形型等へ供給するための溶融ガラスの流量調節装置
を提供できるようになる。
As a result, even if the temperature of the outflow pipe is raised and lowered relatively quickly, a molten glass lump having a small weight change, a good shape, and a good optical quality without striae over a long period of time into a molding die or the like. It becomes possible to provide a molten glass flow rate adjusting device for supplying.

【0069】[0069]

【発明の効果】以上説明した様に、本発明によれば、長
期にわたって、重量変動が小さく、形状が良好で、脈理
のない光学的品質の良好な溶融ガラス塊を成形型等へ供
給することができる溶融ガラスの流量調節装置が提供さ
れる。
As described above, according to the present invention, a molten glass lump having a small weight fluctuation, a good shape, and a good optical quality without striae is supplied to a molding die or the like over a long period of time. There is provided an apparatus for controlling the flow rate of molten glass.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の第1の実施形態の説明のための図であ
る。
FIG. 1 is a diagram for explaining a first embodiment of the present invention.

【図2】本発明の第2の実施形態の説明のための図であ
る。
FIG. 2 is a diagram for explaining a second embodiment of the present invention.

【図3】本発明の第3の実施形態の説明のための図であ
る。
FIG. 3 is a diagram for explaining a third embodiment of the present invention.

【図4】従来例の説明図である。FIG. 4 is an explanatory diagram of a conventional example.

【図5】従来例の説明図である。FIG. 5 is an explanatory diagram of a conventional example.

【図6】図4で示される従来装置に基づいてガラスを流
出した時の、流出管の変形を示す図である。
FIG. 6 is a view showing deformation of an outflow pipe when glass is discharged based on the conventional apparatus shown in FIG.

【図7】図5で示される従来装置に基づいてガラスを流
出した時の、流出管の変形を示す図である。
FIG. 7 is a view showing a deformation of the outflow pipe when the glass flows out based on the conventional apparatus shown in FIG.

【符号の説明】[Explanation of symbols]

1 ガラス溶融槽 2 流出口 3 流出管 4 ガラス溶融炉 5 炉内雰囲気 6 ヒーター 7 溶融ガラス 8 攪拌棒 9 溶融ガラス液面 10 保温材 11 給電端子 12 給電端子 13 金の端子 14 金の端子 15 電線 16 給電装置 17 熱電対 18 溶融ガラス 19 流出管先端部 20 流出ガラス 31 流出管 31a 流出管の上側部分 31b 流出管の下側部分 32 流出管先端部 33 給電端子 34 給電端子 35 保温材 36 金の端子 37 金の端子 38 ガラス溶融槽 39 ガラス溶融炉 40 ヒーター 41 攪拌棒 42 溶融ガラス 43 流出口 44 熱電対 45 熱電対 46 溶融ガラス 47 流出ガラス 48 給電装置 49 溶融ガラス液面 51 ガラス溶融炉 52 ガラス溶融槽 53 攪拌棒 54 ヒーター 55 流出口 56 流出管 57 溶融ガラス液面 58 給電端子 59 給電端子 60 給電端子 61 給電端子 62 炉壁 63 保温材 64 金の端子 65 金の端子 66 金の端子 67 金の端子 68 溶融ガラス 69 熱電対 70 給電装置 71 流出管先端部 72 流出ガラス 101 ガラス溶融槽 102 流出口 103 流出管 104 保温材 105 給電端子 106 給電端子 107 給電装置 108 溶融ガラス 109 熱電対 110 溶融ガラス 111 流出管 111a 流出管の上側部分 111b 流出管の下側部分 112 保温材 113 給電端子 114 給電端子 115 給電装置 116 流出管先端部分 117 熱電対 118 熱電対 119 溶融ガラス 121 流出管中間部 122 保温材 123 流出管先端部 124 流出管中間部 125 保温材 126 流出管先端部 DESCRIPTION OF SYMBOLS 1 Glass melting tank 2 Outflow port 3 Outflow pipe 4 Glass melting furnace 5 Furnace atmosphere 6 Heater 7 Molten glass 8 Stirrer rod 9 Molten glass liquid level 10 Heat insulation material 11 Power supply terminal 12 Power supply terminal 13 Gold terminal 14 Gold terminal 15 Electric wire Reference Signs List 16 power supply device 17 thermocouple 18 molten glass 19 outflow pipe tip 20 outflow glass 31 outflow pipe 31a upper part of outflow pipe 31b lower part of outflow pipe 32 outflow pipe tip 33 power supply terminal 34 power supply terminal 35 heat insulator 36 gold Terminal 37 Gold terminal 38 Glass melting tank 39 Glass melting furnace 40 Heater 41 Stirrer rod 42 Melted glass 43 Outflow port 44 Thermocouple 45 Thermocouple 46 Molten glass 47 Outflow glass 48 Power supply device 49 Molten glass liquid level 51 Glass melting furnace 52 Glass Melting tank 53 Stirrer rod 54 Heater 55 Outlet 56 Outflow pipe 57 Melting gas Liquid surface 58 Power supply terminal 59 Power supply terminal 60 Power supply terminal 61 Power supply terminal 62 Furnace wall 63 Insulation material 64 Gold terminal 65 Gold terminal 66 Gold terminal 67 Gold terminal 68 Molten glass 69 Thermocouple 70 Power supply device 71 Outflow pipe tip Part 72 outflow glass 101 glass melting tank 102 outflow port 103 outflow pipe 104 heat insulator 105 power supply terminal 106 power supply terminal 107 power supply device 108 molten glass 109 thermocouple 110 molten glass 111 outflow pipe 111a upper part of outflow pipe 111b lower side of outflow pipe Part 112 Insulation material 113 Power supply terminal 114 Power supply terminal 115 Power supply device 116 Outflow pipe tip part 117 Thermocouple 118 Thermocouple 119 Fused glass 121 Outflow pipe middle part 122 Insulation material 123 Outflow pipe tip part 124 Outflow pipe middle part 125 Insulation material 126 Outflow Tube tip

───────────────────────────────────────────────────── フロントページの続き (72)発明者 久保 裕之 東京都大田区下丸子3丁目30番2号 キヤ ノン株式会社内 (72)発明者 冨田 昌之 東京都大田区下丸子3丁目30番2号 キヤ ノン株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Kubo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Masayuki Tomita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inside the corporation

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ガラス溶融槽の流出口に取付けられた白
金または白金合金製の流出管と、 該流出管に直流または交流電圧を印加するために該流出
管に接続された白金または白金合金製の給電端子と、 該給電端子に電力を供給するための給電装置とを備え、 前記給電端子の基端側に金製の屈曲部を有する端子が接
続され、該金製の端子は、白金または白金合金製の前記
給電端子に比べて、電気的な抵抗は同等で、強度が小さ
いことを特徴とする溶融ガラスの流量調節装置。
1. An outflow pipe made of platinum or a platinum alloy attached to an outlet of a glass melting tank, and a platinum or platinum alloy connected to the outflow pipe for applying a DC or AC voltage to the outflow pipe. A power supply device for supplying power to the power supply terminal, a terminal having a bent portion made of gold is connected to a base end side of the power supply terminal, and the gold terminal is platinum or An apparatus for controlling the flow rate of molten glass, characterized in that the electric resistance is equal and the strength is small as compared with the power supply terminal made of a platinum alloy.
【請求項2】 ガラス溶融槽の流出口に取付けられた白
金または白金合金製の流出管と、 該流出管に直流または交流電圧を印加するために該流出
管に接続された白金または白金合金製の給電端子と、 該給電端子に電力を供給するための給電装置とを備え、 前記給電端子はガラスの流れる方向を軸として前記流出
管の軸対称の位置に設置され、前記給電端子の基端側に
金製の屈曲部を有する端子が接続され、該金製の端子
は、白金または白金合金製の前記給電端子に比べて、電
気的な抵抗は同等で、強度が小さいことを特徴とする溶
融ガラスの流量調節装置。
2. An outflow pipe made of platinum or a platinum alloy attached to an outlet of a glass melting tank, and a platinum or platinum alloy connected to the outflow pipe for applying a DC or AC voltage to the outflow pipe. And a power supply device for supplying power to the power supply terminal, wherein the power supply terminal is installed at an axially symmetric position of the outflow pipe with respect to a flowing direction of the glass as an axis, and a base end of the power supply terminal. A terminal having a bent portion made of gold is connected to the side, and the gold terminal has the same electrical resistance and lower strength than the power supply terminal made of platinum or a platinum alloy. Flow control device for molten glass.
JP2001025835A 2001-02-01 2001-02-01 Flow rate regulating device of fused glass Withdrawn JP2002234736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001025835A JP2002234736A (en) 2001-02-01 2001-02-01 Flow rate regulating device of fused glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001025835A JP2002234736A (en) 2001-02-01 2001-02-01 Flow rate regulating device of fused glass

Publications (1)

Publication Number Publication Date
JP2002234736A true JP2002234736A (en) 2002-08-23

Family

ID=18890753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001025835A Withdrawn JP2002234736A (en) 2001-02-01 2001-02-01 Flow rate regulating device of fused glass

Country Status (1)

Country Link
JP (1) JP2002234736A (en)

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