JPS62131440A - Manufacture of cathode-ray tube - Google Patents
Manufacture of cathode-ray tubeInfo
- Publication number
- JPS62131440A JPS62131440A JP27140285A JP27140285A JPS62131440A JP S62131440 A JPS62131440 A JP S62131440A JP 27140285 A JP27140285 A JP 27140285A JP 27140285 A JP27140285 A JP 27140285A JP S62131440 A JPS62131440 A JP S62131440A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- funnel
- temperature
- panel
- furnace
- 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.)
- Granted
Links
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は陰極線管の製造方法、特に管内の７ＩＯ熱排気
方法に関するものでおる。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for manufacturing a cathode ray tube, and particularly to a method for exhausting 7IO heat inside the tube.
従来、陰極線管、例えばブラウン管を製造する場合、一
般にガラスパルプのパネル内面に螢光面を形成してベー
キングを行なう一方でファンネル内面に内装黒鉛膜を形
成し、両者をフリットシールにより封着した後、ネック
部に電子銃を封止し、その後でバルブを排気炉内に入れ
、約４００℃程度まで加熱しながら、管内の排気を行な
っていた。Conventionally, when manufacturing cathode ray tubes, such as cathode ray tubes, a fluorescent surface is generally formed on the inner surface of a glass pulp panel and baked, while an internal graphite film is formed on the inner surface of the funnel, and both are sealed with a frit seal. An electron gun was sealed in the neck, and then the valve was placed in an exhaust furnace, and the inside of the tube was evacuated while being heated to about 400°C.
この加熱排気工程においては、第３図で示すようにパネ
ル１とファンネル２とがフリットシール部３で封着して
構成姑れるバルブ４を、第４図に示すように約１０１１
１１四方の網目状の金網で形成したゲージ５内に挿入し
、このゲージ５の支持体５ａに連結された図示しないベ
ルトコンベアにより排気炉６内を定速で移動させ、この
排気炉６内の底部から吹き出す熱風１により、バルブ４
を外部から加熱しながら管内の排気を行なっていた。こ
の場合のゲージ５は排気炉６内でバルブ４の爆縮発生時
にガラス破片による隣接バルブへの影響を防止式せてい
る。In this heating and exhausting step, the panel 1 and the funnel 2 are sealed with the frit seal portion 3 as shown in FIG.
It is inserted into a gauge 5 formed of a wire mesh with 11 square meshes, and is moved at a constant speed inside the exhaust furnace 6 by a belt conveyor (not shown) connected to the support 5a of the gauge 5. Hot air 1 blowing out from the bottom causes valve 4 to
The inside of the pipe was evacuated while being heated from the outside. The gauge 5 in this case is designed to prevent glass fragments from affecting adjacent bulbs when the bulb 4 implodes in the exhaust furnace 6.
なお、ブラウン管の排気方法は例えば特開昭５６−１６
２４５１号公報などに記載されている。The method for exhausting a cathode ray tube is, for example, disclosed in Japanese Patent Application Laid-Open No. 56-16.
It is described in Publication No. 2451, etc.
しかしながら、このような排気方法によると、排気炉６
内では熱風Ｔがその内側壁を下部から上部に向って上昇
し、バルブ４が加熱でれるので、熱風Ｔが最初に当るフ
ァンネル２および排気炉５の内側壁を通過した熱風７が
集中するパネル１部分の表面温度が約４００℃となり、
一方パルブ４内の温度は約３４０℃となり、パルプ４の
内外面で約６０℃程度の温度差が生じる。この結果、フ
リットシール部３において、パルプ１外面側では高温度
による圧縮力が作用し、その内面側では低温度による伸
張力が作用する。換言すれば、フリットシール部３に肉
厚方向の熱応力が発生し、この部分の接合力を低下させ
ることになる。特にフリットシール部３の肉厚が大きい
例えば２４インチ以上の大形ブラウン管では爆縮が発生
しやすくなるという問題があった。However, according to such an exhaust method, the exhaust furnace 6
Inside, the hot air T rises up the inner wall from the bottom to the top, and the valve 4 is heated, so the hot air 7 that has passed through the funnel 2, which the hot air T hits first, and the inner wall of the exhaust furnace 5 concentrates on the panel. The surface temperature of one part is about 400℃,
On the other hand, the temperature inside the pulp 4 is about 340°C, and a temperature difference of about 60°C occurs between the inner and outer surfaces of the pulp 4. As a result, in the frit seal portion 3, a compressive force due to the high temperature acts on the outer surface of the pulp 1, and an elongating force due to the low temperature acts on the inner surface thereof. In other words, thermal stress is generated in the frit seal portion 3 in the thickness direction, reducing the bonding force in this portion. Particularly in large cathode ray tubes in which the frit seal portion 3 has a large wall thickness, for example, 24 inches or more, there is a problem in that implosion is likely to occur.
本発明の目的は、パルプの７リツトシ一ル部の熱応力の
発生を軽ｔｃすせ、排気中の爆縮の発生を低減させるこ
とができる陰極線管の製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a cathode ray tube that can reduce the occurrence of thermal stress in the 7-litre seal portion of pulp and reduce the occurrence of implosion during exhaust.
このような目的を達成するために本発明による陰極線管
の製造方法は、パルプのファンネルまたはパネルの少な
くとも一方の温度を、フリットシール部の温度よりも相
対的に低くしてパルプの刀口熱排気を行なうものでるる
。In order to achieve such an object, the method for manufacturing a cathode ray tube according to the present invention makes the temperature of at least one of the pulp funnel or the panel relatively lower than the temperature of the frit seal part to exhaust heat from the pulp edge. There's something to do.
次に図面を用いて本発明の実施例を詳細に説明する。 Next, embodiments of the present invention will be described in detail using the drawings.
第１図は本発明による陰極線管の製造方法の一実施例を
説明するだめの排気装置の断面図であり、前述の図と同
一部分は同一符号を付しである。同図において、パルプ
４を挿入するゲージ５′はそのファンネル２と対向する
底面にステンレス製の遮蔽板８が固定配置されている。FIG. 1 is a cross-sectional view of a preliminary exhaust device for explaining an embodiment of the method for manufacturing a cathode ray tube according to the present invention, and the same parts as those in the previous figures are given the same reference numerals. In the figure, a gauge 5' into which the pulp 4 is inserted has a shielding plate 8 made of stainless steel fixedly arranged on the bottom surface facing the funnel 2.
第２図はそのゲージ５の斜視図を示したものでるる。FIG. 2 shows a perspective view of the gauge 5.
このような構成において、底面に熱遮蔽板８を装着した
ゲージ５′内にパルプ４を挿入し、排気炉６内を所定方
向に定速で移動させて加熱排気を行なう。この場合、排
気炉６の底部から吹き出した熱風Ｔは遮蔽板８により遮
断でれ、ゲージ５′の側面側網目から進入してパルプ４
が加熱される。このためにファンネル２には排気炉６の
底部から吹き出した熱風７が直接当たることがなく、遮
蔽板８を介して間接的に加熱されることになるので、フ
ァンネル２の温度がパネル１に対して約２０℃程度低下
する。この結果、パルプ４の内外面の温度差が小さくな
り、これによってフリットシール部３の外面側の温度が
低下するので、熱応力の発生が大幅に低減され、例えば
２４インチ管においては、排気炉６内での爆縮発生率を
約７％から約１チ程度まで著しく減少させることができ
た。In such a configuration, the pulp 4 is inserted into the gauge 5' having a heat shielding plate 8 attached to the bottom thereof, and heated and evacuated by moving the pulp 4 in the exhaust furnace 6 in a predetermined direction at a constant speed. In this case, the hot air T blown out from the bottom of the exhaust furnace 6 is blocked by the shielding plate 8, enters through the side mesh of the gauge 5', and enters the pulp 4.
is heated. For this reason, the funnel 2 is not directly hit by the hot air 7 blown out from the bottom of the exhaust furnace 6, but is heated indirectly via the shielding plate 8, so that the temperature of the funnel 2 is lower than that of the panel 1. The temperature drops by about 20°C. As a result, the temperature difference between the inner and outer surfaces of the pulp 4 becomes smaller, which lowers the temperature on the outer surface of the frit seal portion 3, thereby significantly reducing the occurrence of thermal stress. We were able to significantly reduce the incidence of implosion within 6.6 cm from about 7% to about 1.6 cm.
なお、前述した実施例においては、ファンネル２の温度
をパネル１の温度に対して低くして加熱排気を行なった
場合について説明しだが、本発明はこれに限定でれるこ
とはなく、例えばパネル１の表面中央部にヒートシンク
などを設けてこの部分の熱を吸収でせ、パネル１全体の
温度を低下させることにより、フリットシール部３の温
度を低下させても前述と全く同様の効果が得られる。こ
のような方法によれば、排気装置の構造を大きく変更す
ることなく容易に実施することができる。In addition, in the above-mentioned embodiment, the case was explained in which the temperature of the funnel 2 was lowered than the temperature of the panel 1 to perform heating exhaust, but the present invention is not limited to this, and for example, the temperature of the funnel 2 is lower than that of the panel 1. By providing a heat sink or the like in the center of the surface of the panel to absorb the heat in this area and lowering the temperature of the entire panel 1, the same effect as described above can be obtained even if the temperature of the frit seal section 3 is lowered. . According to such a method, it can be easily implemented without significantly changing the structure of the exhaust device.
また、パネル１およびファンネル２の温度を同時に低下
させ、フリットシール部３と同等ないしは低くしても前
述と全く同様の効果が得られることは勿論である。Furthermore, it goes without saying that even if the temperatures of the panel 1 and the funnel 2 are lowered at the same time to be equal to or lower than the temperature of the frit seal section 3, the same effect as described above can be obtained.
以上説明したように本発明による陰極線管の製造方法に
よれば、排気炉内での加熱排気工程を、パルプのファン
ネルまたはパネルの少なくとも一方の温度を、プリント
シール部の温度よりも相対的に低くしてパルプの７１Ｏ
Ａ６排気を行なうことによシ、フリットシール部の熱応
力の発生を低減嘔せることかできるので、爆縮の発生を
著しく低減石せ、排気装置の大幅な変更２作業性を低下
させることなく、陰極線管の歩留りを向上１せることか
できるという極めて優れた効果が得られる。As explained above, according to the method for manufacturing a cathode ray tube according to the present invention, the heating and exhausting step in the exhaust furnace is performed so that the temperature of at least one of the pulp funnel or the panel is relatively lower than the temperature of the printed seal part. 71O of pulp
By performing A6 exhaust, it is possible to reduce the occurrence of thermal stress in the frit seal part, which significantly reduces the occurrence of implosion, making it possible to significantly change the exhaust system without reducing work efficiency. , an extremely excellent effect can be obtained in that the yield of cathode ray tubes can be improved.
第１図は本発明による陰極線管の製造方法の一実施例を
説明するための排気装置の断面図、第２図は第１図のゲ
ージを示す斜視図、第３図および第４図は本発明の詳細
な説明するだめの図でるる。
１・・・・パネル、２・・−・ファンネル、３・・・・
フリットシール部、４・・・・ガラスパルプ、５′・・
・・ゲージ、５＆ ・・・・支持体、６・・・・排気炉
、Ｔ・・・・熱風、８・・・・熱遮蔽板。FIG. 1 is a sectional view of an exhaust device for explaining an embodiment of the method for manufacturing a cathode ray tube according to the present invention, FIG. 2 is a perspective view showing the gauge in FIG. 1, and FIGS. This figure is intended to explain the invention in detail. 1...Panel, 2...Funnel, 3...
Frit seal part, 4...Glass pulp, 5'...
...Gauge, 5...Support, 6...Exhaust furnace, T...Hot air, 8...Heat shield plate.
Claims (1)
電子銃を封止したガラスパルプを排気炉内で加熱排気す
る工程を有する陰極線管の製造方法において、ガラスパ
ルプのフアンネルまたはパネルの少なくとも一方の温度
をフリットシール部の温度よりも相対的に低くして加熱
排気することを特徴とした陰極線管の製造方法。In a method for manufacturing a cathode ray tube, the method includes the step of heating and exhausting glass pulp, which has a fluorescent surface formed on the inner surface of the panel and an electron gun sealed in the funnel neck part, in an exhaust furnace. A method of manufacturing a cathode ray tube characterized by heating and exhausting at a temperature relatively lower than that of the frit seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60271402A JPH0785400B2 (en) | 1985-12-04 | 1985-12-04 | Method for manufacturing cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60271402A JPH0785400B2 (en) | 1985-12-04 | 1985-12-04 | Method for manufacturing cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62131440A true JPS62131440A (en) | 1987-06-13 |
| JPH0785400B2 JPH0785400B2 (en) | 1995-09-13 |
Family
ID=17499558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60271402A Expired - Fee Related JPH0785400B2 (en) | 1985-12-04 | 1985-12-04 | Method for manufacturing cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0785400B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5501928A (en) * | 1994-12-14 | 1996-03-26 | Thomson Consumer Electronics, Inc. | Method of manufacturing a luminescent screen for a CRT by conditioning a screen-structure layer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210668A (en) * | 1975-07-15 | 1977-01-27 | Sony Corp | Process of cathode ray tube |
-
1985
- 1985-12-04 JP JP60271402A patent/JPH0785400B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210668A (en) * | 1975-07-15 | 1977-01-27 | Sony Corp | Process of cathode ray tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5501928A (en) * | 1994-12-14 | 1996-03-26 | Thomson Consumer Electronics, Inc. | Method of manufacturing a luminescent screen for a CRT by conditioning a screen-structure layer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0785400B2 (en) | 1995-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |