JPH0253375B2 - - Google Patents
Info
- Publication number
- JPH0253375B2 JPH0253375B2 JP11403184A JP11403184A JPH0253375B2 JP H0253375 B2 JPH0253375 B2 JP H0253375B2 JP 11403184 A JP11403184 A JP 11403184A JP 11403184 A JP11403184 A JP 11403184A JP H0253375 B2 JPH0253375 B2 JP H0253375B2
- Authority
- JP
- Japan
- Prior art keywords
- glass rod
- outer diameter
- optical fiber
- base material
- storage device
- 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.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005373 porous glass Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
【発明の詳細な説明】
［発明の背景と目的］
本発明は光フアイバ母材の成形装置に係り、特
に、VAD法により製造された母材用ガラスロツ
ドを一定の設定外径に延伸成形する光フアイバ母
材の成形装置に関するものである。[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a forming device for an optical fiber base material, and in particular, an optical fiber forming device for forming a base material glass rod manufactured by the VAD method by stretching to a predetermined outer diameter. This invention relates to a fiber base material forming apparatus.
従来、VAD法（気相軸付法）により製造され
る多孔質ガラスプリフオームを加熱炉により加熱
して透明なガラスロツドとし、これを延伸して光
フアイバ母材とする方法は、人手により加熱装置
のバーナで加熱し牽引装置で延伸するもので、そ
のため手間と熟練とを要し、非常に作業能率が悪
く、しかも、常に一定の品質のものが得られない
という難点があつた。 Conventionally, the method of heating a porous glass preform manufactured by the VAD method (vapor deposition method) in a heating furnace to form a transparent glass rod and drawing it to form an optical fiber base material requires manual heating equipment. The process involves heating with a burner and stretching with a traction device, which requires time and skill, resulting in extremely low work efficiency and the disadvantage that products of constant quality cannot always be obtained.
そのため、第１図に示すように自動化装置によ
りガラスロツドの延伸が行われるようになつた。
図の延伸装置において、１は本体、２はガラスロ
ツド３の固定側端部のチヤツク、４は同じく移動
側端部のチヤツク、５は牽引装置、６はバーナ７
および外径測定器９を載置した台車、８は温度
計、１０は制御器である。この装置は、本体１に
ガラスロツド３を横置きにその一端をチヤツク２
により支持し、ガラスロツド３の他端部を移動可
能な牽引装置５のチヤツク４により支持する。そ
して移動可能な台車６上のバーナ７でガラスロツ
ド３を加熱する。加熱されたガラスロツド３の表
面温度を温度計８で測定し、設定温度に達した時
点で牽引装置５を右方向に移動させるとともに台
車６上の外径側定器９でガラスロツド３の延伸外
径が設定外径値になるように制御器１０により牽
引装置５の移動速度を制御しながら、ガラスロツ
ド３を光フアイバ母材に適するように延伸するも
のである。 Therefore, as shown in FIG. 1, glass rods have been drawn using automated equipment.
In the drawing device shown in the figure, 1 is the main body, 2 is a chuck at the fixed end of the glass rod 3, 4 is also a chuck at the movable end, 5 is a traction device, and 6 is a burner 7.
8 is a thermometer, and 10 is a controller. This device consists of a main body 1 with a glass rod 3 placed horizontally, and one end of which is connected to a chuck 2.
The other end of the glass rod 3 is supported by a chuck 4 of a movable traction device 5. The glass rod 3 is then heated by a burner 7 on a movable trolley 6. The surface temperature of the heated glass rod 3 is measured with a thermometer 8, and when the set temperature is reached, the traction device 5 is moved to the right, and the stretched outer diameter of the glass rod 3 is adjusted using the outer diameter side measuring device 9 on the trolley 6. The glass rod 3 is stretched so as to be suitable for the optical fiber base material while controlling the moving speed of the pulling device 5 by the controller 10 so that the outer diameter becomes the set outer diameter value.
ところが、この延伸装置によると、加熱された
ガラスロツド３の外径を測定する場合に測定誤差
が生じ易い。また、設定した延伸外径まで牽引装
置５を移動させる方法では台車６が間欠移動とな
り延伸後のガラスロツド３の外径に変動を与える
ことになる。さらに、凹凸の大きなガラスロツド
３を平滑なガラスロツドに延伸することは困難で
あるなどの問題があつた。 However, with this stretching device, measurement errors are likely to occur when measuring the outer diameter of the heated glass rod 3. Further, in the method of moving the pulling device 5 to a set stretched outer diameter, the cart 6 moves intermittently, which causes fluctuations in the outer diameter of the glass rod 3 after stretching. Furthermore, there were other problems such as difficulty in drawing the glass rod 3 having large irregularities into a smooth glass rod.
本発明の目的は、上記問題点を解決し、ガラス
ロツドを高精度で一定した延伸外径を有するよう
に成型することができる光フアイバ母材の成型装
置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an optical fiber base material molding apparatus that can mold a glass rod with high precision to have a constant stretched outer diameter.
［発明の概要］
本発明は、横置された母材用ガラスロツドに対
して、その軸線方向に沿つて移動可能な加熱装置
および外径測定器、並びに前記ガラスロツドを延
伸する牽引装置を備えた光フアイバ母材の成形装
置において、前記ガラスロツドの全長にわたりそ
の外径測定値を測定位置とともに記憶する位置セ
ンサ並びに記憶装置を設け、該記憶装置に記憶さ
れた前記外径測定値と、設定延伸外径値との偏差
量に基づいて前記牽引装置の移動速度を制御する
比較制御装置を設けてガラスロツドを延伸しその
外径を一定に成形するように構成されていること
を特徴とするものである。[Summary of the Invention] The present invention provides an optical system that includes a heating device and an outer diameter measuring device that are movable along the axial direction of a horizontally placed glass rod for a base material, and a pulling device that stretches the glass rod. A fiber base material forming apparatus is provided with a position sensor and a storage device for storing the outer diameter measurement value along the entire length of the glass rod together with the measurement position, and the outer diameter measurement value stored in the storage device and the set stretched outer diameter are provided. The present invention is characterized in that a comparison control device is provided to control the moving speed of the traction device based on the amount of deviation from the glass rod, and the glass rod is stretched and formed to have a constant outer diameter.
［実施例］
以下、本発明の一実施例を第２図に基づいて説
明する。図において、１１は本体、１２はガラス
ロツド１３の固定側端部のチヤツク、１４は同じ
く移動側端部のチヤツク、１５は牽引装置、１６
はバーナ１７を有し移動可能な加熱装置、１８は
温度計、１９は位置センサ２０とともに台車２６
に設けられた外径測定器、２１は位置センサ２０
および外径測定器１９からの信号を記憶する記憶
装置、２２は記憶装置２１に係合し牽引装置１５
の移動速度を制御する比較制御装置であり、この
実施例が第１図に示す従来のものと異るところ
は、ガラスロツド１３の全長にわたりその外径測
定値を測定位置とともに記憶する位置センサ２０
および記憶装置２１を設け、記憶装置２１に記憶
された外径測定値と、母材とするために設定した
延伸外径値との偏差量に基づいて牽引装置１５の
移動速度を制御する比較制御装置２２を設けてガ
ラスロツド１３を延伸しその外径を一定に成形す
るように構成されている点である。すなわちこの
実施例では、ガラスロツド１３は本体１１のチヤ
ツク１２と１４とに支持されている。加熱装置１
６はモータによりガラスロツド１３に沿つてその
全長にわたり往復移動ができる。また、外径測定
器１９と位置センサ２０とは台車２６上に設けら
れ、加熱装置１６と同様にガラスロツド１３に沿
つてその全長にわたり往復移動ができる。牽引装
置１５は任意の速度でガラスロツド１３の延伸方
向に移動できるようになつている。この装置の操
作にあたり、まず台車２６は、ガラスロツド１３
の一端のチヤツク１２の位置からチヤツク１４の
位置までガラスロツド１３の全長にわたり移動し
ながら、外径測定器１９並びに位置センサ２０に
より外径と位置とを測定し、その値を記憶装置２
１に記憶させる。次に加熱装置１６をガラスロツ
ド１３の一端でチヤツク１２の場所に位置させ、
バーナ１７に点火する。加熱条件のO2、H2の量
は予め実験によつて求められており、延伸可能な
温度になつて、加熱装置１６が移動を開始する。
そして牽引装置１５の移動速度は、記憶装置２１
に記憶されている外径測定値と設定延伸外径値と
を比較制御装置２２で比較し、その偏差量に基づ
いて移動速度を制御する。この場合、ガラスロツ
ド１３の偏差量の大きい部分では、牽引装置１５
の移動速度を早くし、逆に、偏差量が小さい部分
では速度を遅くして延伸後のガラスロツド１３の
外径を一定にすることができる。[Example] Hereinafter, an example of the present invention will be described based on FIG. 2. In the figure, 11 is the main body, 12 is a chuck at the fixed end of the glass rod 13, 14 is also a chuck at the movable end, 15 is a traction device, and 16
is a movable heating device having a burner 17; 18 is a thermometer; 19 is a position sensor 20 and a cart 26;
21 is a position sensor 20
and a storage device 22 for storing signals from the outer diameter measuring device 19, which is engaged with the storage device 21 and connected to the traction device 15.
The difference between this embodiment and the conventional one shown in FIG.
and a storage device 21, and comparison control for controlling the moving speed of the traction device 15 based on the amount of deviation between the outer diameter measurement value stored in the storage device 21 and the stretched outer diameter value set for the base material. The point is that a device 22 is provided to stretch the glass rod 13 and shape it to a constant outer diameter. That is, in this embodiment the glass rod 13 is supported on the chucks 12 and 14 of the body 11. Heating device 1
6 can be moved back and forth along the entire length of the glass rod 13 by a motor. Further, the outer diameter measuring device 19 and the position sensor 20 are provided on a trolley 26, and like the heating device 16, they can be reciprocated along the entire length of the glass rod 13. The traction device 15 can be moved at any speed in the direction of extension of the glass rod 13. When operating this device, first the cart 26 is moved to the glass rod 13.
While moving over the entire length of the glass rod 13 from the position of the chuck 12 at one end to the position of the chuck 14, the outer diameter and position are measured by the outer diameter measuring device 19 and the position sensor 20, and the values are stored in the storage device 2.
Store it in 1. Next, a heating device 16 is placed at one end of the glass rod 13 at the location of the chuck 12;
Ignite burner 17. The amounts of O 2 and H 2 in the heating conditions are determined in advance through experiments, and the heating device 16 starts moving when the temperature reaches a temperature that allows stretching.
The moving speed of the traction device 15 is stored in the storage device 21.
The comparison control device 22 compares the measured outer diameter value and the set stretched outer diameter value stored in the controller 22, and controls the moving speed based on the amount of deviation. In this case, in the portion where the deviation amount of the glass rod 13 is large, the traction device 15
The outer diameter of the glass rod 13 after stretching can be kept constant by increasing the moving speed and decreasing the moving speed in areas where the amount of deviation is small.
［発明の効果］
以上説明したように、本発明によれば、母材用
ガラスロツドを高精度で一定した延伸外径を有す
る光フアイバ母材とすることができ、この母材に
よれば性能のすぐれた光フアイバを製造すること
が容易になるという工業的効果を奏することがで
きる。[Effects of the Invention] As explained above, according to the present invention, the glass rod for the base material can be made into an optical fiber base material having a highly precise and constant drawn outer diameter, and this base material has improved performance. It is possible to produce an industrial effect that it becomes easy to manufacture an excellent optical fiber.
第１図は従来の光フアイバ母材製造装置の全体
図、第２図は本発明の一実施例の光フアイバ母材
製造装置の全体図である。
１，１１；本体、３，１３；ガラスロツド、
５，１５；牽引装置、７，１７；バーナ、１６；
加熱装置、１９；外径測定器、２０；位置セン
サ、２１；記憶装置、２２；比較制御装置。
FIG. 1 is an overall view of a conventional optical fiber preform manufacturing apparatus, and FIG. 2 is an overall view of an optical fiber preform manufacturing apparatus according to an embodiment of the present invention. 1, 11; Main body, 3, 13; Glass rod,
5, 15; Traction device, 7, 17; Burner, 16;
Heating device, 19; Outer diameter measuring device, 20; Position sensor, 21; Storage device, 22; Comparison control device.
Claims (1)
の軸線方向に沿つて移動可能な加熱装置および外
径測定器、並びに前記ガラスロツドを延伸する牽
引装置を備えた光フアイバ母材の成形装置におい
て、前記ガラスロツドの全長にわたりその外径測
定値を測定位置とともに記憶する位置センサ並び
に記憶装置を設け、該記憶装置に記憶された前記
外径測定値と、設定延伸外径値との偏差量に基づ
いて前記牽引装置の移動速度を制御する比較制御
装置を設けてガラスロツドを延伸し、その外径を
一定に成形するように構成されていることを特徴
とする光フアイバ母材の成形装置。1. An optical fiber preform forming apparatus that is equipped with a heating device and an outer diameter measuring device that are movable along the axial direction of a horizontally placed glass rod for the preform, and a traction device that stretches the glass rod, A position sensor and a storage device are provided for storing the measured outer diameter value along the entire length of the glass rod along with the measurement position, and based on the amount of deviation between the measured outer diameter value stored in the storage device and the set stretched outer diameter value. An apparatus for forming an optical fiber base material, characterized in that a comparative control device for controlling the moving speed of the pulling device is provided to draw the glass rod and form the glass rod to a constant outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11403184A JPS60260429A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11403184A JPS60260429A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60260429A JPS60260429A (en) | 1985-12-23 |
| JPH0253375B2 true JPH0253375B2 (en) | 1990-11-16 |
Family
ID=14627298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11403184A Granted JPS60260429A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60260429A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5558692A (en) * | 1994-07-25 | 1996-09-24 | Corning Incorporated | Optical waveguide preform measurement during manufacture |
| FR2728888B1 (en) * | 1994-12-29 | 1997-01-31 | Alcatel Cable | PROCESS FOR OBTAINING FIBER OPTIC PREFORM USING PLASMA RECHARGE |
| JP3131162B2 (en) * | 1996-11-27 | 2001-01-31 | 信越化学工業株式会社 | Manufacturing method of optical fiber preform |
| JP6180377B2 (en) * | 2013-07-02 | 2017-08-16 | 信越化学工業株式会社 | Drawing method of glass base material |
-
1984
- 1984-06-04 JP JP11403184A patent/JPS60260429A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60260429A (en) | 1985-12-23 |
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