JPH05116965A - Apparatus for producing glass tube - Google Patents

Apparatus for producing glass tube

Info

Publication number
JPH05116965A
JPH05116965A JP27532391A JP27532391A JPH05116965A JP H05116965 A JPH05116965 A JP H05116965A JP 27532391 A JP27532391 A JP 27532391A JP 27532391 A JP27532391 A JP 27532391A JP H05116965 A JPH05116965 A JP H05116965A
Authority
JP
Japan
Prior art keywords
glass tube
outer diameter
sleeve
measuring means
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP27532391A
Other languages
Japanese (ja)
Inventor
Koichi Nishio
広一 西尾
Hiromoto Takeda
浩基 竹田
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.)
AGC Techno Glass Co Ltd
Original Assignee
Toshiba Glass Co Ltd
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 Toshiba Glass Co Ltd filed Critical Toshiba Glass Co Ltd
Priority to JP27532391A priority Critical patent/JPH05116965A/en
Publication of JPH05116965A publication Critical patent/JPH05116965A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/04Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To efficiently and stably produce a glass tube having a prescribed outside diameter with simple operations. CONSTITUTION:Glass tube outside diameter measuring means 12, 13 which respectively measure the outside diameters are disposed near a sleeve 1 and just before a cutting means 8 for the glass tube formed by a tube-drawing. This apparatus is so constituted as to control the pressure gas to be supplied by continuously computing the outside diameter control of the glass tube in accordance with the measured values by these glass tube outside diameter measuring means. Namely, the glass tube changed in the outside diameter by adjusting the blow pressure is subjected to the primary measurement of the outside diameter by the 1st glass tube outside diameter measuring means 12 at the point of this time. On the other hand, the outside diameter is measured by the 2nd glass tube outside diameter measuring means 13 even at the point of the time when the glass tube is cut as the final product. The measured values by the two glass tube outside diameter measuring means 12, 13 are both instantaneously fed back to the control of the pressure gas to be supplied. The wasteful time is decreased and eliminated and the exact adjustment of the corresponding blow pressure is possible.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は所定の外径を有するガラ
ス管を、連続的,かつ容易に製造し得るガラス管の製造
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass tube manufacturing apparatus capable of continuously and easily manufacturing a glass tube having a predetermined outer diameter.

【0002】[0002]

【従来の技術】周知のようにガラス管は、たとえば蛍光
ランプの構成などに広く使用されており、また蛍光ラン
プの製造においては、製造される蛍光ランプの品質面な
どから、ガラス管においても品種に応じた一定の外径を
有することが望まれている。ところで、ガラス管の製造
には、一般に次のような手段が採られている。すなわ
ち、図3にその概略構成を断面的に示すごとく、斜め方
向に配置され回転するスリーブ1と、前記スリーブ1の
上端側の周面に溶融ガラス2を滴下する溶融ガラス供給
源3と、前記スリーブ1の軸心に沿い貫通して設けられ
たガス圧送路4と、前記スリーブ1周面に担持された溶
融ガラス2′に対してガス圧送路4を介して圧ガスを供
給してスリーブ1下端側で溶融ガラス2′を所要外径に
バルブ化する圧ガス供給源5と、前記スリーブ1下端側
でバルブ化しながら管引きする管引き手段6と、前記管
引き手段6により管引き・形成したガラス管7を所要の
長さに切断するガラス管切断手段8と、前記管引き手段
6近傍において所要外径にバルブ化されたガラス管の外
径を測定するガラス管外径測定手段9と、前記管引き・
形成したガラス管7の切断手段8位置の直前に配置され
切断するガラス管7の管引き・形成速度を測定する管引
き速度測定手段10と、前記管引き速度測定手段10からの
信号および管外径測定手段9での測定結果により圧ガス
供給源5からのガス供給圧を制御するブロー圧制御手段
12を具備して成るガラス管の製造装置が知られている。
2. Description of the Related Art As is well known, glass tubes are widely used, for example, in the construction of fluorescent lamps, and in the manufacture of fluorescent lamps, the quality of the fluorescent lamps manufactured and other factors also contribute to the production of glass tubes. It is desired to have a constant outer diameter according to By the way, the following means are generally adopted for manufacturing a glass tube. That is, as shown in a schematic cross-sectional view in FIG. 3, a sleeve 1 arranged in an oblique direction and rotating, a molten glass supply source 3 for dropping molten glass 2 on the peripheral surface of the sleeve 1 on the upper end side, A gas pressure feed passage 4 penetrating along the axis of the sleeve 1 and a molten glass 2'carried on the peripheral surface of the sleeve 1 are supplied with a pressure gas through the gas pressure feed passage 4 to thereby provide the sleeve 1 At the lower end side, a pressurized gas supply source 5 for turning the molten glass 2'to a required outer diameter, at the lower end side of the sleeve 1, a tube drawing means 6 for drawing a tube while forming a valve, and a tube drawing / forming by the tube drawing means 6 A glass tube cutting means 8 for cutting the formed glass tube 7 to a required length, and a glass tube outer diameter measuring means 9 for measuring the outer diameter of the glass tube which is valved to the required outer diameter in the vicinity of the tube drawing means 6. , The pipe drawing
Pipe drawing speed measuring means 10 arranged immediately before the cutting means 8 position of the formed glass tube 7 to measure the drawing / forming speed of the glass tube 7 to be cut, and a signal from the tube drawing speed measuring means 10 and the outside of the tube. Blow pressure control means for controlling the gas supply pressure from the pressurized gas supply source 5 based on the measurement result of the diameter measuring means 9.
A glass tube manufacturing apparatus comprising 12 is known.

【0003】次に、上記構成のガラス管製造装置の動作
について説明する。
Next, the operation of the glass tube manufacturing apparatus having the above structure will be described.

【0004】スリーブ1の上端側の周面に溶融ガラス供
給源3から滴下された溶融ガラス2は、回転するスリー
ブ1周面に巻き付き・担持され、重力によって下端(先
端)側に移動する。そして、スリーブ1の下端(先端)
側に達した溶融ガラス2′は、バルブ化しながら管引き
手段6によって管引きされる。つまり、このとき前記ス
リーブ1の軸心に沿い貫通して設けられたガス圧送路4
を介して供給される圧ガスによって、スリーブ1下端側
で溶融ガラス2′は所要外径にバルブ化しながら、管引
き手段6によって管引きされる。しかして、この管引き
で形成したガラス管7は、ガラス管切断手段8によって
所要の長さに切断されて所要のガラス管が得られる。こ
のガラス管製造工程において、ガラス管の外径・肉厚は
前記管引き手段6による管引き(引っ張り)速度,スリ
ーブ1のガス圧送路4を介して供給(送入)されるガス
圧(空気圧など)、溶融ガラス2の滴下量(供給量)に
よって決まる。
Molten glass 2 dropped from the molten glass supply source 3 on the peripheral surface on the upper end side of the sleeve 1 is wrapped around and carried on the peripheral surface of the rotating sleeve 1 and moves to the lower end (tip) side by gravity. And the lower end (tip) of the sleeve 1
The molten glass 2 ′ that has reached the side is drawn by the tube drawing means 6 while forming a bulb. That is, at this time, the gas pressure feed passage 4 provided so as to penetrate along the axis of the sleeve 1
The molten glass 2'is pipe-drawn by the pipe-drawing means 6 on the lower end side of the sleeve 1 while being valved to a required outer diameter by the pressurized gas supplied via the pipe. Then, the glass tube 7 formed by this tube drawing is cut into a required length by the glass tube cutting means 8 to obtain a required glass tube. In this glass tube manufacturing process, the outer diameter and the wall thickness of the glass tube are the tube drawing (pulling) speed by the tube drawing means 6 and the gas pressure (pneumatic pressure) supplied (introduced) through the gas pressure passage 4 of the sleeve 1. Etc.) and the amount of the molten glass 2 dropped (supply amount).

【0005】一方、前記のガラス管製造過程において
は、スリーブ1の先端からガラス管外径測定手段9まで
の距離を、管引き速度で除した値を無駄(遅れ)時間と
し、この遅れ時間とガラス管外径測定手段9による測定
値(外径偏差信号)とから、ブロー圧制御手段12によっ
て、前記圧ガス供給源5からのガス供給圧を制御し、連
続的に製造されるガラス管の外径ないし肉厚など制御し
ている。
On the other hand, in the above-mentioned glass tube manufacturing process, a value obtained by dividing the distance from the tip of the sleeve 1 to the glass tube outer diameter measuring means 9 by the tube drawing speed is regarded as a dead (delay) time. The blow pressure control means 12 controls the gas supply pressure from the compressed gas supply source 5 based on the measured value (outer diameter deviation signal) by the glass tube outer diameter measuring means 9 to continuously produce glass tubes. The outer diameter and wall thickness are controlled.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、前記構
成のガラス管製造装置には、次のような不都合な問題が
ある。すなわち、上記ガラス管製造装置の場合は、管引
きされたガラス管7を切断するガラス管切断手段8の近
傍に配置した1個のガラス管外径測定手段9によって外
径値を読取り、ガラス管外径を規格中央値(設計値)に
一致させるように演算し、ブロー圧制御手段12に供給圧
ガス(ブロー圧)値を出力させる構成を成している。し
たがって、ガラス管7の管引きラインが長くなると(数
十メートルの場合もある)、前記ブロー圧の調整(調
節)と現実に管引き製造されたガラス管外径とが対応し
ない現象が起こる。つまり、ブロー圧が調節されて外径
を変化させたガラス管が、実際にガラス管外径測定手段
9に到達するまで数秒ないし数分の時間(遅れ時間)を
要するため、的確に対応したブロー圧の調節もしくはガ
ラス管外径測定手段9の制御演算も事実上困難で、一定
の外径制御を達成し得ないのが実情である。
However, the glass tube manufacturing apparatus having the above structure has the following inconvenient problems. That is, in the case of the above glass tube manufacturing apparatus, the outer diameter value is read by one glass tube outer diameter measuring means 9 arranged in the vicinity of the glass tube cutting means 8 for cutting the drawn glass tube 7, and the outer diameter value is read. The configuration is such that the outer diameter is calculated so as to match the standard median value (design value), and the blow pressure control means 12 outputs the supply pressure gas (blow pressure) value. Therefore, if the drawing line of the glass tube 7 becomes long (may be several tens of meters), a phenomenon occurs in which the blow pressure adjustment (adjustment) does not correspond to the outer diameter of the actually manufactured glass tube. In other words, it takes several seconds to several minutes (delay time) for the glass tube whose blow pressure is adjusted to change the outer diameter to actually reach the glass tube outer diameter measuring means 9. It is practically difficult to adjust the pressure or control the glass tube outer diameter measuring means 9, and it is impossible to achieve a constant outer diameter control.

【0007】一方、近年ガラス管の外径制御手段とブロ
ー圧制御手段とを一体化し、一つの制御装置とすること
も試みられている。しかし、このガラス管の外径制御手
段とブロー圧制御手段とを一体化した制御装置を具備し
た構成の場合は、ブロー圧発生源の1次圧が電源電圧の
変動により変化し易く、ブロー圧が変化したときもしく
はガラス管の外径を変化させる何等かの外乱が発生した
ときなど、前記のような無駄(遅れ)時間に起因して、
製造されるガラス管の外径にバラツキが生じるという問
題がある。
On the other hand, in recent years, it has been attempted to integrate the outer diameter control means of the glass tube and the blow pressure control means into a single control device. However, in the case of a configuration including a control device in which the outer diameter control means of the glass tube and the blow pressure control means are integrated, the primary pressure of the blow pressure generation source is likely to change due to fluctuations in the power supply voltage, and the blow pressure is likely to change. When there is a change or when some disturbance that changes the outer diameter of the glass tube occurs, due to the dead (delay) time as described above,
There is a problem that the outer diameter of the manufactured glass tube varies.

【0008】従来の手段はいずれの場合も、前記のよう
な問題の存在に伴い、製造するガラス管の品種変更ある
いは日中と夜間とで、制御定数の変更を要するなどの問
題があるため、製造操作性(量産性)が劣るという不都
合がある。
In any of the conventional means, there is a problem that due to the existence of the above-mentioned problems, the type of glass tube to be manufactured must be changed or the control constant must be changed between daytime and nighttime. There is an inconvenience that the manufacturing operability (mass productivity) is poor.

【0009】本発明は上記事情に対処してなされたもの
で、操作が容易で能率よく,かつ安定的に所定の外径か
ら成るガラス管を製造し得る製造装置の提供を目的とす
る。
The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a manufacturing apparatus capable of easily manufacturing a glass tube having a predetermined outer diameter with high efficiency and stability.

【0010】[0010]

【課題を解決するための手段】本発明に係るガラス管の
製造装置は、斜め方向に配置され回転するスリーブと、
前記スリーブの上端側の周面に溶融ガラスを滴下する溶
融ガラス供給源と、前記スリーブの軸心に沿い貫通して
設けられたガス圧送路と、前記スリーブ周面に担持され
た溶融ガラスに対してガス圧送路を介して圧ガスを供給
してスリーブ下端側で溶融ガラスを所要外径にバルブ化
する圧ガス供給源と、前記スリーブ下端側でバルブ化し
ながら管引きする管引き手段と、前記管引き手段により
管引き・形成したガラス管を所要の長さに切断するガラ
ス管切断手段と、前記回転するスリーブ近傍において所
要外径にバルブ化されたガラス管の外径を測定する第1
のガラス管外径測定手段と、前記管引き・形成したガラ
ス管の切断手段位置の直前に配置され切断するガラス管
の外径を測定する第2のガラス管外径測定手段と、前記
第2のガラス管外径測定手段による測定値の偏差量を演
算し第1のガラス管外径測定手段による測定値の偏差量
と対比してガス圧送路を介して供給する圧ガスを制御す
る供給圧ガス制御手段とを具備して成ることを特徴とす
る。
SUMMARY OF THE INVENTION A glass tube manufacturing apparatus according to the present invention comprises a sleeve arranged obliquely and rotating,
A molten glass supply source for dropping molten glass onto the peripheral surface on the upper end side of the sleeve, a gas pressure feed passage penetrating along the axial center of the sleeve, and a molten glass carried on the peripheral surface of the sleeve. A pressure gas supply source for supplying a pressure gas through a gas pressure feeding path to valve the molten glass to a required outer diameter on the lower end side of the sleeve; Glass tube cutting means for cutting the glass tube drawn / formed by the tube drawing means to a required length, and first measuring the outer diameter of the glass tube valved to the required outer diameter in the vicinity of the rotating sleeve.
Glass tube outer diameter measuring means, second glass tube outer diameter measuring means arranged immediately before the cutting means position of the glass tube formed and drawn, and measuring the outer diameter of the glass tube to be cut; The amount of deviation of the measured value by the glass tube outer diameter measuring means is calculated and compared with the amount of deviation of the measured value by the first glass tube outer diameter measuring means to control the pressurized gas supplied through the gas pressure feeding passage. And a gas control means.

【0011】[0011]

【作用】本発明に係るガラス管の製造装置においては、
スリーブの近傍および管引き・形成されたガラス管の切
断手段位置の直前に、それぞれ外径を測定するガラス管
外径測定手段が配置されており、これらのガラス管外径
測定手段による測定値に基づいて、連続的にガラス管外
径制御を演算して供給する圧ガスを制御する構成と成っ
ている。つまり、ブロー圧が調節されて外径を変化させ
たガラス管は、その時点で1次的に第1のガラス管外径
測定手段によって外径が測定される一方、最終製品とし
て切断される時点でも第1のガラス管外径測定手段にて
外径が測定され、両ガラス管外径測定手段による測定値
の相互が、瞬時に供給する圧ガスの制御にフィードバッ
クされる。換言すると互いに離隔している複数箇所での
測定値相互によって供給圧ガスの制御演算がなされるこ
とになるので、実質的にいわゆる無駄時間(遅れ時間)
が大幅に低減・解消することになり、的確に対応したブ
ロー圧の調節が可能となる。したがって、ガラス管の製
造において、常に安定した状態で所定(一定)の外径制
御を達成し得る。
In the glass tube manufacturing apparatus according to the present invention,
Glass tube outer diameter measuring means for measuring the outer diameter are arranged in the vicinity of the sleeve and immediately before the cutting means position of the drawn / formed glass tube. Based on this, the glass tube outer diameter control is continuously calculated to control the pressurized gas to be supplied. That is, for the glass tube whose blow pressure is adjusted to change the outer diameter, the outer diameter is primarily measured by the first glass tube outer diameter measuring means at that time, while the glass tube is cut as the final product. However, the outer diameter is measured by the first glass tube outer diameter measuring means, and the mutual measurement values of both the glass tube outer diameter measuring means are fed back to the control of the pressurized gas supplied instantaneously. In other words, the control calculation of the supply pressure gas is performed by the measured values at a plurality of points separated from each other, so that the so-called dead time (delay time) is substantially generated.
Will be greatly reduced and eliminated, and the blow pressure can be adjusted appropriately. Therefore, in manufacturing a glass tube, it is possible to always achieve a predetermined (constant) outer diameter control in a stable state.

【0012】[0012]

【実施例】以下図1〜図2を参照して本発明の実施例を
説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0013】図1は本発明に係るガラス管製造装置の構
成の概略を示すブロック図であり、1は斜め方向に配置
され回転するスリーブ、3は前記スリーブ1の上端側の
周面に溶融ガラス2を滴下する溶融ガラス供給源、4は
前記スリーブの軸心に沿い貫通して設けられたガス圧送
路、5は前記スリーブ1周面に担持された溶融ガラス
2′に対してガス圧送路4を介して圧ガス(ブロー圧)
を供給してスリーブ1下端側で溶融ガラス2′を所要外
径にバルブ化する圧ガス供給源(たとえば空気ブロー圧
発生装置)、6は前記スリーブ1下端側で溶融ガラス
2′をバルブ化しながら所定の速度で管引きする管引き
手段、8は前記管引き手段6により管引き・形成したガ
ラス管7を所要の長さに切断するガラス管切断手段であ
る。また、12は前記回転するスリーブ1近傍において所
要外径にバルブ化されたガラス管7の外径を測定する第
1のガラス管外径測定手段、13は前記管引き・形成した
ガラス管切断手段8位置の直前に配置され切断するガラ
ス管7の外径を測定する第2のガラス管外径測定手段、
14は前記第2のガラス管外径測定手段13による測定値の
偏差量を演算し第1のガラス管外径測定手段12による測
定値の偏差量と対比してガス圧送路4を介して供給する
圧ガスを制御する供給圧ガス制御手段である。
FIG. 1 is a block diagram showing the outline of the structure of a glass tube manufacturing apparatus according to the present invention, wherein 1 is a sleeve which is obliquely arranged and rotates, and 3 is a molten glass on the peripheral surface of the upper end of the sleeve 1. A molten glass supply source for dripping 2 is a gas pressure feed passage 4 which penetrates along the axis of the sleeve, and a gas pressure feed passage 4 is a gas pressure feed passage 4 for a molten glass 2'carried on the peripheral surface of the sleeve 1. Through pressurized gas (blow pressure)
To supply a pressure gas supply source (for example, an air blow pressure generator) for making the molten glass 2'at the lower end side of the sleeve 1 into a required outer diameter, and 6 while making the molten glass 2'at the lower end side of the sleeve 1 as a valve. A tube drawing means for drawing the tube at a predetermined speed, and a glass tube cutting means 8 for cutting the glass tube 7 drawn and formed by the tube drawing means 6 into a required length. Further, 12 is a first glass tube outer diameter measuring means for measuring the outer diameter of the glass tube 7 valved to a required outer diameter in the vicinity of the rotating sleeve 1, and 13 is the glass tube cutting means formed and drawn. Second glass tube outer diameter measuring means arranged immediately before the 8th position to measure the outer diameter of the glass tube 7 to be cut,
Reference numeral 14 calculates the deviation amount of the measured value by the second glass tube outer diameter measuring means 13 and compares it with the deviation amount of the measured value by the first glass tube outer diameter measuring means 12 and supplies it via the gas pressure feeding path 4. It is a supply pressure gas control means for controlling the pressure gas to be applied.

【0014】つまり、本発明に係るガラス管製造装置
は、その基本的な構成において従来の場合と共通する
が、ガラス管外径測定手段を複数個配置すること、その
ガラス管外径測定手段を配置する位置としてスリーブ1
近傍およびガラス管切断手段8位置の直前を選択したこ
と、さらにこれら両ガラス管外径測定手段による外径測
定値を基に、最適なブロー圧の設定値を演算してブロー
圧を制御することなどの機能を付加したものといえる。
That is, although the glass tube manufacturing apparatus according to the present invention has the same basic configuration as that of the conventional case, a plurality of glass tube outer diameter measuring means are arranged and the glass tube outer diameter measuring means is arranged. Sleeve 1 as the position to place
To select the vicinity and immediately before the position of the glass tube cutting means 8 and to control the blow pressure by calculating an optimum blow pressure set value based on the outer diameter measurement values of these glass tube outer diameter measurement means. It can be said that these functions are added.

【0015】次に、上記構成のガラス管製造装置の動作
例、ないし使用態様例の要点を説明する。
Next, an explanation will be given of the points of the operation example or the usage example of the glass tube manufacturing apparatus having the above-mentioned structure.

【0016】先ず、スリーブ1の上端側の周面に溶融ガ
ラス供給源3から滴下された溶融ガラス2は、回転する
スリーブ1周面に巻き付き・担持され、重力によって下
端(先端)側に移動する。そして、スリーブ1の下端
(先端)側に達した溶融ガラス2′は、バルブ化しなが
ら一定速度で管引き手段6によって管引きされる。つま
り、このとき前記スリーブ1の軸心に沿い貫通して設け
られたガス圧送路4を介して供給される圧ガスによっ
て、スリーブ1下端側で溶融ガラス2′は所要外径にバ
ルブ化しながら、管引き手段6によって管引きされる。
しかして、管引きされたガラス管7は、前記ガラス管切
断手段8位置直前に配置されている第2のガラス管外径
測定手段13によって外径が測定される。
First, the molten glass 2 dropped from the molten glass supply source 3 on the peripheral surface on the upper end side of the sleeve 1 is wrapped around and carried on the peripheral surface of the rotating sleeve 1 and moved to the lower end (tip) side by gravity. .. The molten glass 2 ′ reaching the lower end (tip) side of the sleeve 1 is drawn by the drawing means 6 at a constant speed while forming a valve. That is, at this time, the molten glass 2'is valved to the required outer diameter on the lower end side of the sleeve 1 by the pressurized gas supplied through the gas pressure feeding passage 4 provided penetrating along the axis of the sleeve 1, It is drawn by the drawing means 6.
The outer diameter of the drawn glass tube 7 is measured by the second glass tube outer diameter measuring means 13 arranged immediately before the position of the glass tube cutting means 8.

【0017】そして、その測定値(データ)PV2 は図2
にブロック図として示すように、ディジタルフィルター
DF2 を通して平滑化された後、 PID2 演算ブロックのPV
入力となり、ここで外径目標値(設定値)に対してPID
演算され、操作出力MV2 が決定される。つまり、第2の
ガラス管外径測定手段13で得た外径データと、規格中央
値…目的値(設定中心値)との差(偏差)を演算して、
第1のガラス管外径測定手段12における外径目標値(設
定値)となる操作出力MV2 が決定され、比率設定RBによ
って感度調整される。
The measured value (data) PV 2 is shown in FIG.
As shown in the block diagram in
PV of PID 2 operation block after smoothed through DF 2.
It becomes an input, and here the PID for the outer diameter target value (setting value)
The operation output MV 2 is calculated. That is, the difference (deviation) between the outer diameter data obtained by the second glass tube outer diameter measuring means 13 and the standard median value ... target value (set center value) is calculated,
The operation output MV 2 that is the outer diameter target value (set value) in the first glass tube outer diameter measuring means 12 is determined, and the sensitivity is adjusted by the ratio setting RB.

【0018】一方、前記第1のガラス管外径測定手段12
によって測定された外径データPV1 は、ディジタルフィ
ルターDF1 を通して平滑化された後、前記比率設定RBブ
ロックの出力SV1 と PID1 ブロックにて比較 PID演算
(偏差値の演算)される。この比較 PID演算された PID
1 ブロックからの出力MV1 が、ブロー圧制御手段14の目
標値(設定値)SV3 となる。この目標値SV3 に対する現
実のブロー圧PV3が等しい値を呈するように、 PID3
ロックにて PID演算されて操作出力MV3 を出力する。こ
うして出力された操作出力MV3 によって、供給圧(ブロ
ー圧)制御手段14のブロー圧開閉弁を自動的に制御し
て、目標値(設定値)SV3 に対して最適なブロー圧が設
定・保持されることになる。しかも、第1のガラス管外
径測定手段12は、スリーブ1に近接して配置され、無駄
時間が低減された形を構成しているため、第2のガラス
管外径測定手段13における目標値(設定値)に対し、ク
ィックリイに応動して安定(一定)した状態で所定の外
径から成るガラス管が製造される。
On the other hand, the first glass tube outer diameter measuring means 12
The outer diameter data PV 1 measured by is smoothed through the digital filter DF 1 , and then is compared PID calculation (deviation calculation) at the output SV 1 of the ratio setting RB block and the PID 1 block. This comparison PID Calculated PID
The output MV 1 from one block becomes the target value (set value) SV 3 of the blow pressure control means 14. PID calculation is performed in the PID 3 block to output the operation output MV 3 so that the actual blow pressure PV 3 with respect to this target value SV 3 exhibits the same value. The operation output MV 3 thus output automatically controls the blow pressure on-off valve of the supply pressure (blow pressure) control means 14 to set the optimum blow pressure for the target value (set value) SV 3 . Will be retained. Moreover, since the first glass tube outer diameter measuring means 12 is arranged close to the sleeve 1 and has a shape in which the dead time is reduced, the target value in the second glass tube outer diameter measuring means 13 is set. With respect to the (set value), a glass tube having a predetermined outer diameter is manufactured in a stable (constant) state in response to a quick dry.

【0019】本発明に係るガラス管製造装置は、前記構
成例に限定されるものでなく、たとえばガラス管外径測
定手段を3箇所以上に設置してもよいし、また各ガラス
管外径測定手段に対応させてブロー圧制御手段を配置し
て、さらに精度の向上を図ってもよい。
The glass tube manufacturing apparatus according to the present invention is not limited to the above-mentioned constitutional example, and for example, glass tube outer diameter measuring means may be installed at three or more places, and each glass tube outer diameter measuring means. The blow pressure control means may be arranged corresponding to the means to further improve the accuracy.

【0020】[0020]

【発明の効果】上記説明したように、本発明に係るガラ
ス管の製造装置によれば、管引き開始時(スリーブ1に
近接した位置),管引き・形成されたガラス管の切断位
置近くで、それぞれ外径が測定され、これらの測定値
(データ)に基づいて、管引き・形成するガラス管の外
径制御が演算される。換言すると、ガラス管を管引き・
形成する(一定速度で管引きする)とき、外径の変化な
いし精度に大きく関与するブロー圧が、容易にかつ速応
的に制御され、外径の振動が抑制・低減するので、溶融
ガラスの流量(滴下量),温度の変化などの外乱もほと
んど無視し得る状態で、外径が一定のガラス管を量産的
に製造することが可能である。
As described above, according to the glass tube manufacturing apparatus of the present invention, at the start of tube drawing (position close to the sleeve 1), near the cutting position of the drawn / formed glass tube. The outer diameter of each glass tube is measured, and the outer diameter control of the glass tube to be drawn / formed is calculated based on these measured values (data). In other words, pull the glass tube
When forming (pulling at a constant speed), the blow pressure, which greatly affects the change or accuracy of the outer diameter, is easily and promptly controlled, and vibration of the outer diameter is suppressed and reduced. It is possible to mass-produce a glass tube with a constant outer diameter in a state in which disturbances such as changes in flow rate (dropping amount) and temperature can be almost ignored.

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

【図1】本発明に係るガラス管の製造装置の要部構成例
を示すブロック図。
FIG. 1 is a block diagram showing a configuration example of a main part of a glass tube manufacturing apparatus according to the present invention.

【図2】本発明に係るガラス管の製造装置における管引
き・形成するガラス管の外径測定および供給ガス圧(ブ
ロー圧)の制御手段を説明するためのブロック図。
FIG. 2 is a block diagram for explaining an outer diameter measurement and a supply gas pressure (blow pressure) control means for drawing and forming a glass tube in the glass tube manufacturing apparatus according to the present invention.

【図3】従来のガラス管の製造装置の要部構成を模式的
に示す断面図。
FIG. 3 is a cross-sectional view schematically showing a configuration of a main part of a conventional glass tube manufacturing apparatus.

【符号の説明】[Explanation of symbols]

1…回転可能なスリーブ 2,2′…溶融ガラス
3…溶融ガラス供給源 4…ガス圧送路 5…圧ガス供給源 6…管引き手
段 7…管引き・形成されたガラス管 8…ガラス
管切断手段 9…外径測定手段 10…管引き速度測
定手段 11…ブロー圧制御手段 12…第1のガラス
管外径測定手段 13…第2のガラス管外径測定手段
14…供給圧(ブロー圧)制御手段
1 ... rotatable sleeve 2, 2 '... molten glass
3 ... Molten glass supply source 4 ... Gas pressure feeding path 5 ... Pressure gas supply source 6 ... Pipe drawing means 7 ... Glass tube formed / formed 8 ... Glass tube cutting means 9 ... Outer diameter measuring means 10 ... Pipe drawing speed measurement Means 11 ... Blow pressure control means 12 ... First glass tube outer diameter measuring means 13 ... Second glass tube outer diameter measuring means
14 ... Supply pressure (blow pressure) control means

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 斜め方向に配置され回転するスリーブ
と、前記スリーブの上端側の周面に溶融ガラスを滴下す
る溶融ガラス供給源と、前記スリーブの軸心に沿い貫通
して設けられたガス圧送路と、前記スリーブ周面に担持
された溶融ガラスに対してガス圧送路を介して圧ガスを
供給してスリーブ下端側で溶融ガラスを所要外径にバル
ブ化する圧ガス供給源と、前記スリーブ下端側でバルブ
化しながら管引きする管引き手段と、前記管引き手段に
より管引き・形成したガラス管を所要の長さに切断する
ガラス管切断手段と、前記回転するスリーブ近傍におい
て所要外径にバルブ化されたガラス管の外径を測定する
第1のガラス管外径測定手段と、前記管引き・形成した
ガラス管の切断手段位置の直前に配置され切断するガラ
ス管の外径を測定する第2のガラス管外径測定手段と、
前記第2のガラス管外径測定手段による測定値の偏差量
を演算し第1のガラス管外径測定手段による測定値の偏
差量と対比してガス圧送路を介して供給する圧ガスを制
御する供給圧ガス制御手段とを具備して成ることを特徴
とするガラス管の製造装置。
1. A sleeve which is arranged in an oblique direction and rotates, a molten glass supply source for dropping molten glass onto the peripheral surface on the upper end side of the sleeve, and a gas pressure feed provided penetrating along the axis of the sleeve. A channel, a pressure gas supply source for supplying a pressure gas to the molten glass carried on the peripheral surface of the sleeve through a gas pressure feed channel to valve the molten glass to a required outer diameter on the lower end side of the sleeve, and the sleeve. A tube drawing means for drawing a tube while forming a valve at the lower end side, a glass tube cutting means for cutting a glass tube drawn / formed by the tube drawing means to a required length, and a required outer diameter near the rotating sleeve. A first glass tube outer diameter measuring means for measuring the outer diameter of the bulbized glass tube, and an outer diameter of the glass tube to be cut and arranged immediately before the cutting means position of the glass tube formed and drawn. Second glass tube outer diameter measuring means,
The amount of deviation of the measured value by the second glass tube outer diameter measuring means is calculated and compared with the amount of deviation of the measured value by the first glass tube outer diameter measuring means to control the pressurized gas supplied through the gas pressure feeding path. And a supply pressure gas control means for controlling the glass tube.
JP27532391A 1991-10-23 1991-10-23 Apparatus for producing glass tube Withdrawn JPH05116965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27532391A JPH05116965A (en) 1991-10-23 1991-10-23 Apparatus for producing glass tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27532391A JPH05116965A (en) 1991-10-23 1991-10-23 Apparatus for producing glass tube

Publications (1)

Publication Number Publication Date
JPH05116965A true JPH05116965A (en) 1993-05-14

Family

ID=17553855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27532391A Withdrawn JPH05116965A (en) 1991-10-23 1991-10-23 Apparatus for producing glass tube

Country Status (1)

Country Link
JP (1) JPH05116965A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2376015A (en) * 2001-06-02 2002-12-04 Zeiss Stiftung Drawing glass tubing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2376015A (en) * 2001-06-02 2002-12-04 Zeiss Stiftung Drawing glass tubing
GB2376015B (en) * 2001-06-02 2005-06-29 Zeiss Stiftung Device for reduction of gas flow

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