JPS61239543A - Coating method for fluorescent material suspension - Google Patents
Coating method for fluorescent material suspensionInfo
- Publication number
- JPS61239543A JPS61239543A JP8072785A JP8072785A JPS61239543A JP S61239543 A JPS61239543 A JP S61239543A JP 8072785 A JP8072785 A JP 8072785A JP 8072785 A JP8072785 A JP 8072785A JP S61239543 A JPS61239543 A JP S61239543A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- suspension
- opening
- steam
- foot section
- 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.)
- Pending
Links
Landscapes
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、U字状螢光ランプの製造工程で。[Detailed description of the invention] [Industrial application field] This invention relates to the manufacturing process of U-shaped fluorescent lamps.
U字状のガラス管内面に螢光体懸濁液を塗布する方法に
関するっ
〔従来の技術〕
通常、U字状螢光ランプの製造工程で、U字状のガラス
管内面に螢光体懸濁液(V後半に懸濁液と略称する)を
塗布するには、まずU字状ガラス管を、その脚部開口端
が上向きになるように保持し9脚部開口端より懸濁液を
ガラス管内に注入し、 1ガラス管内を懸濁液
で満たしてから、ガラス管を反転させて内部の懸濁液を
流し出し2脚部開口端を下にした状態で乾燥させるとい
う方法が行われている。Related to a method for applying a phosphor suspension to the inner surface of a U-shaped glass tube [Prior art] Usually, in the manufacturing process of a U-shaped fluorescent lamp, a phosphor suspension is applied to the inner surface of a U-shaped glass tube. To apply a suspension (abbreviated as "suspension" in the second half of V), first hold a U-shaped glass tube with the open ends of the legs facing upward, and pour the suspension from the open ends of the nine legs. The method used is to inject it into a glass tube, fill the first glass tube with the suspension, and then turn the glass tube upside down to pour out the suspension and dry it with the open ends of the two legs facing down. ing.
このような従来性われている塗布方法では、IA:。In such conventional coating methods, IA:.
産的に塗布しようとする時、ガラス管内に懸濁液を外部
に漏洩させることな(正確に充満させる機構と、懸濁液
を内部に充満させたガラス管を、暉 □濁液
を周囲に飛散させることなく反転させる機構が難しく、
必然的に複雑な構造の塗布装置が必要 □と々
る。このような問題を解消することを目的として1本出
願人は特願昭58−245956号でU字状ガラス管の
内面に懸濁液を塗布するのに有効。When attempting to apply the suspension to the outside, the glass tube must be filled with an accurate filling mechanism and the glass tube filled with the suspension must not be leaked to the outside. It is difficult to create a mechanism to turn it over without causing it to scatter.
A coating device with a complicated structure is inevitably required. In order to solve this problem, the present applicant has published Japanese Patent Application No. 58-245956 to effectively apply a suspension to the inner surface of a U-shaped glass tube.
かつ簡潔な構造の塗布装置を提案している。この特願昭
58−245 !956号で提案している装置では、U
字状ガラス管を、その脚部開口端が下方になるように保
持し、一方の脚部開口端から懸濁液をガラス管内に噴射
し、他の脚部開口端から流下させるという方法で塗布す
る機構になっているので、ガラス管を反転させる必要が
なく、簡潔な構造の装置になっている。We also propose a coating device with a simple structure. This special application was made in 1984-245! In the device proposed in No. 956, U
Application is carried out by holding a letter-shaped glass tube with the open end of the leg facing downward, and injecting the suspension into the glass tube from the open end of one leg and letting it flow down from the open end of the other leg. Since the mechanism is such that there is no need to invert the glass tube, the device has a simple structure.
しかし、U字状ガラス管の一方の脚部端から懸濁液を噴
射して塗布する方法では、懸濁液を噴射する脚部の反対
側の脚部内面に塗シ残しの部分ができやすいという問題
がある。通常、上記懸濁液は溶剤として水を使用してい
るので乾燥しているガラス面に対する濡れ性はあま如良
好でなく、従って上記のようなU字状ガラス管の一方の
脚部から懸濁液を噴射し、他方の脚部に流下させるよう
な塗布方法では、噴射する側の脚部は懸濁液が充満され
るので問題ないが2反対側の脚部は懸濁流が自然流下す
るだけなので塗シ残しが発生しやすい。However, when applying the suspension by spraying it from the end of one leg of a U-shaped glass tube, it is easy to leave uncoated areas on the inner surface of the leg on the opposite side of the leg from which the suspension is sprayed. There is a problem. Normally, the above suspension uses water as a solvent, so it does not have very good wettability on a dry glass surface. If the application method involves spraying the liquid and letting it flow down the other leg, there is no problem because the leg on the side to be sprayed will be filled with the suspension, but the leg on the opposite side will just have the suspension flowing down naturally. Therefore, it is easy to leave paint marks behind.
この発明は上記の問題を解決することを目的としたもの
で、U字状ガラス管の脚部開口端を下方に位置させ、一
方の開口より水蒸気を吹き込みガラス管内を湿潤させて
から、他の一方の開口より懸濁液をガラス管頂部に向け
て噴射するということを特徴とする。U字状ガラス管内
に懸濁流を効率良く塗布する方法を提供するものである
。The purpose of this invention is to solve the above-mentioned problem.The opening end of the leg of a U-shaped glass tube is positioned downward, and water vapor is blown into one opening to moisten the inside of the glass tube. It is characterized in that the suspension is injected from one opening toward the top of the glass tube. The present invention provides a method for efficiently applying a suspension flow inside a U-shaped glass tube.
上記のようなこの発明の塗布方法によれば、U字状ガラ
ス管内に懸濁液を噴射する時には、噴射する反対側の脚
部内面は水蒸気で充分に湿潤されているので、水を溶剤
とする懸濁液が非常に濡れやすい状態になってお如、従
って塗シ残し不良は発生しにくい。According to the coating method of the present invention as described above, when the suspension is injected into the U-shaped glass tube, the inner surface of the leg on the opposite side to which the suspension is injected is sufficiently moistened with water vapor, so that water can be used as a solvent. The suspension is in a state where it is very easy to wet, so it is difficult for defects to leave uncoated areas.
以下、この発明の方法を図によって説明する。 Hereinafter, the method of the present invention will be explained with reference to the drawings.
まず、第1図に示すように両脚部(”l+ (12の端
部が開口しているU字状ガラス管(1)を開口部が下方
になるように保持し、一方の脚部aυの開口に水蒸気発
生装置(2)により水蒸気を吹き込む。この水蒸気発生
装置(2)は内部に水QDが入っておシアヒーター02
で一定温度に加熱され、蒸気吹出し口aa+から水蒸気
を吹き出すようになっている。First, as shown in FIG. Steam is blown into the opening by a steam generator (2).This steam generator (2) contains water QD inside and generates a shear heater 02.
It is heated to a constant temperature and steam is blown out from the steam outlet aa+.
次に第2図に示すように、水蒸気を吹き込んだm;
脚部(Illと反対側の脚部+13の開口から
、噴射ノズル(3)により懸濁液(4)をU字状ガラス
管(1)内に噴射する。噴射された懸濁液(4)は脚部
[11j側に流下し、U字状ガラス管fllの内面全体
に塗布される。この後通常の方法で乾燥させることによ
りU字状ガラス管内面に螢光体層を形成する。Next, as shown in FIG. 2, water vapor was blown into m;
The suspension (4) is injected into the U-shaped glass tube (1) by the injection nozzle (3) from the opening of the leg +13 on the opposite side to the leg (Ill).The injected suspension (4) flows down to the leg [11j side and is applied to the entire inner surface of the U-shaped glass tube flll. Thereafter, it is dried in a conventional manner to form a phosphor layer on the inner surface of the U-shaped glass tube.
以上のようなこの発明の塗布方法で内径15m。The inner diameter is 15 m using the coating method of the present invention as described above.
長さ150朋のU字状ガラス管内面に螢光体懸濁液を塗
布した結果1000本中塗シ残し不良の発生は皆無であ
った。As a result of coating the phosphor suspension on the inner surface of a U-shaped glass tube with a length of 150 mm, there was no occurrence of defects due to the intermediate coating remaining after 1000 tubes.
なお、上記のようなこの発明の方法では、U字状ガラス
管(1)内に吹き込む水蒸気の量が重要であシ、少ない
とガラス表面に対する懸濁液の濡れ性が充分改善されず
、又多すぎるとU字状ガラス管(1)の内面に水滴が付
着し、これが懸濁液中に混入して懸濁液が薄くなってし
まう。この水蒸気の量、□、ガ は蒸気発生
装置(2)内の水の温度、蒸気吹出しローとU字状ガラ
ス管(1)の脚部aυの開口端との距離。In addition, in the method of the present invention as described above, the amount of water vapor blown into the U-shaped glass tube (1) is important; if it is small, the wettability of the suspension to the glass surface will not be sufficiently improved; If the amount is too high, water droplets will adhere to the inner surface of the U-shaped glass tube (1) and will be mixed into the suspension, making the suspension thinner. The amount of water vapor, □, is the temperature of the water in the steam generator (2), and the distance between the steam outlet row and the open end of the leg aυ of the U-shaped glass tube (1).
吹き込ろ時間を適当に設定することにより最適値を維持
出来る。The optimum value can be maintained by appropriately setting the blowing time.
以上説明したようにこの発明の方法は、U字状ガラス管
の内面に螢光体懸濁液を塗布するに際し、
′U字状ガラス管両脚部の開口を下方に位置させるとと
もに、一方の開口より水蒸気を吹き込みガラス管内面を
湿潤させてから他の一方の開口より螢光体懸濁液をガラ
ス管頂部に向けて噴射するようにしているので塗り残し
不良がほとんど発生しないという利点がある。As explained above, in the method of the present invention, when applying a phosphor suspension to the inner surface of a U-shaped glass tube,
'Position the openings of both legs of the U-shaped glass tube downward, and blow water vapor through one opening to moisten the inner surface of the glass tube, and then direct the phosphor suspension toward the top of the glass tube through the other opening. This has the advantage that there are almost no uncoated defects.
第1図及び第2図はとの発明の塗布方法を説明するため
のもので9図中(1)はU字状ガラス管、(2)は水蒸
気発生装置、(3)は噴射ノズルである。
なお、各図中同一符号は同−又は相当部分を示す。Figures 1 and 2 are for explaining the coating method of the invention. In Figure 9, (1) is a U-shaped glass tube, (2) is a steam generator, and (3) is an injection nozzle. . Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
濁液を塗布するに際し、ガラス管両脚部の開口を下方に
位置させるとともに、一方の開口より水蒸気を吹き込み
ガラス管内面を湿潤させてから、他の一方の開口より螢
光体懸濁液をガラス管頂部に向けて噴射するようにした
ことを特徴とする螢光体懸濁液の塗布方法。When applying a phosphor suspension to the inner surface of a U-shaped glass tube with both legs opened, the openings of both legs of the glass tube are positioned downward, and water vapor is blown through one opening to coat the inner surface of the glass tube. 1. A method for applying a phosphor suspension, comprising: wetting the glass tube, and then spraying the phosphor suspension toward the top of a glass tube from the other opening.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8072785A JPS61239543A (en) | 1985-04-16 | 1985-04-16 | Coating method for fluorescent material suspension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8072785A JPS61239543A (en) | 1985-04-16 | 1985-04-16 | Coating method for fluorescent material suspension |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61239543A true JPS61239543A (en) | 1986-10-24 |
Family
ID=13726399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8072785A Pending JPS61239543A (en) | 1985-04-16 | 1985-04-16 | Coating method for fluorescent material suspension |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61239543A (en) |
-
1985
- 1985-04-16 JP JP8072785A patent/JPS61239543A/en active Pending
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