JPH01120727A - Phosphor coating method for u-shaped fluorescent lamp - Google Patents
Phosphor coating method for u-shaped fluorescent lampInfo
- Publication number
- JPH01120727A JPH01120727A JP62277860A JP27786087A JPH01120727A JP H01120727 A JPH01120727 A JP H01120727A JP 62277860 A JP62277860 A JP 62277860A JP 27786087 A JP27786087 A JP 27786087A JP H01120727 A JPH01120727 A JP H01120727A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor suspension
- glass tube
- shaped glass
- phosphor
- suspension
- 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000576 coating method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 45
- 239000011521 glass Substances 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract 2
- 230000002950 deficient Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/007—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits adjustable by the driver, e.g. sport mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
- B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- 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字状蛍光ランプのガラス管内面に蛍光体
懸濁液を塗布する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of applying a phosphor suspension to the inner surface of a glass tube of a U-shaped fluorescent lamp.
通常、Ｕ字状蛍光ランプの製造工程で、０字状のガラス
管内面に蛍光体を塗布するには、たとえば、特開昭６２
−５８５４０号公報に記されているような方法がある。Normally, in the manufacturing process of U-shaped fluorescent lamps, in order to apply phosphor to the inner surface of the O-shaped glass tube, for example,
There is a method as described in Japanese Patent No.-58540.
すなわち、第２図に示すように、まず、０字状のガラス
管（１）をその両端開口（１１）、（１２）が上向きに
なるように鉛直に沿って保持しく同図（Ａ））、開口（
１１）、（１２）より蛍光体懸濁液（３）をガラス管（
１）に注入してから、ガラス管（１）を反転させて（同
図（Ｂ）、（Ｃ））内部の懸濁液（３）を流し出し、開
口（１１）、（１２）を下にした状態（同図（Ｄ））で
乾燥させるという方法が行われている。That is, as shown in Figure 2, first, hold the O-shaped glass tube (1) vertically so that the openings at both ends (11) and (12) are facing upward (Figure (A)). , aperture (
11) and (12), put the phosphor suspension (3) into a glass tube (
1), turn the glass tube (1) upside down ((B) and (C) in the same figure), pour out the suspension (3) inside, and lower the openings (11) and (12). A method is used in which the material is dried in the same state ((D) in the same figure).
しかしながら、上記のような従来の方法では、たとえば
、７ｗあるいは９ｗ程度の小形のＵ字状蛍光ランプを製
造する際には特に問題はないが、３８ｗのような全長が
４０（至）以上もある大形のものを製造する際には、塗
布不良の発生が増大するという問題がある。すなわち、
内部に蛍光体懸濁液（３）が注入されたＵ字状ガラス管
（１）を反転させる際、ガラス管（１）内の蛍光体懸濁
液（３）はその大部分が下方側に位置する一方の開口（
１１）より排出され、他方の開口（１２）からはガラス
管（１）内に空気が流入する。しかし、ここで回転速度
がある限界を超えると、蛍光体懸濁液（３）が両方の開
口（１１）、（１２）より流出し両開口（１１）、（１
２）を同時に塞ぐ状態が生じる（第２図（Ｃ））。However, with the conventional method as described above, there is no particular problem when manufacturing a small U-shaped fluorescent lamp of about 7W or 9W, for example, but when manufacturing a small U-shaped fluorescent lamp such as 38W, the total length is 40 (up to) or more. When manufacturing large-sized products, there is a problem in that the occurrence of coating defects increases. That is,
When inverting the U-shaped glass tube (1) into which the phosphor suspension (3) is injected, most of the phosphor suspension (3) inside the glass tube (1) is on the downward side. One opening located (
11), and air flows into the glass tube (1) from the other opening (12). However, when the rotation speed exceeds a certain limit, the phosphor suspension (3) flows out from both openings (11) and (12).
2) is simultaneously blocked (Fig. 2(C)).
このような状態になると、比較的懸濁液量が少ない上方
側の開口（１２）からＵ字状ガラス管（１）内に空気が
流入し、これによって蛍光体懸濁液Ａ液に泡（４）が発
生し、これが塗りむらのような塗布不良を発生させる原
因となる。そして、このような現象は、Ｕ字状ガラス管
（１）が大きくなるほど、排出する蛍光体懸濁液（３）
が多くなるため起こりやすくなる。したがって、大形の
Ｕ字状蛍光ランプを製造する際には、上記の回転速度を
遅くし蛍光体懸濁液の排出をなるべくゆっくりとしなけ
ればならない。一方、Ｕ字状ガラス管（１）内に蛍光体
懸濁液（３）を注入する際、その注入量は塗り残し部の
発生を防ぐためＵ字状ガラス管（１）から溢れない範囲
でできるだけ多くすることが望まれるが、実際にはガラ
ス管内容積のバラツキ、蛍光体懸濁液（３）の注入量の
コントロール精度を考慮して、満杯にせず、第２図（Ａ
）に示すように、液面が開口端より数ｅｆｆｌ程度低位
となる状態に注入する。このような状態で、Ｕ字状ガラ
ス管（１）を回転速度を遅くすると、注入された蛍光体
懸濁液（３）は、回転の途中でそのほとんどが片側の開
口（１１）から流出してしまうため、他方側の開口（１
２）端部自回に懸濁液（３）が流下しない部分（１３）
が生じ、塗り残し不良を発生させる問題を招く。In this state, air flows into the U-shaped glass tube (1) from the upper opening (12) where the amount of suspension is relatively small, causing bubbles ( 4) occurs, which causes coating defects such as uneven coating. This phenomenon occurs as the U-shaped glass tube (1) becomes larger, the more the phosphor suspension (3) is discharged.
It is more likely to occur because there are more Therefore, when manufacturing a large U-shaped fluorescent lamp, it is necessary to slow down the rotation speed and discharge the phosphor suspension as slowly as possible. On the other hand, when injecting the phosphor suspension (3) into the U-shaped glass tube (1), the amount of injection should be within a range that does not overflow from the U-shaped glass tube (1) to prevent unpainted areas. It is desirable to increase the volume as much as possible, but in reality, taking into account the variation in the volume inside the glass tube and the accuracy of controlling the amount of phosphor suspension (3) injected, it should not be filled to the fullest, as shown in Figure 2 (A).
), the liquid is injected so that the liquid level is several effl lower than the opening end. In this state, when the rotation speed of the U-shaped glass tube (1) is slowed down, most of the injected phosphor suspension (3) flows out from the opening (11) on one side during the rotation. The opening on the other side (1
2) Part (13) where the suspension (3) does not flow down on its own at the end
This causes problems such as unpainted defects.
この発明は、上記のような問題を解決することを目的と
してなされたもので、大形のＵ字状蛍光ランプに蛍光体
懸濁液を塗布する際に塗りむらや塗り残しなどの塗布不
良を軽減させ得る蛍光体の塗布方法を提供しようとする
ものである。This invention was made with the aim of solving the above-mentioned problems, and is intended to prevent coating defects such as uneven coating and uncoated areas when applying a phosphor suspension to a large U-shaped fluorescent lamp. The present invention aims to provide a method for applying a phosphor that can reduce the amount of phosphor.
この発明の方法は、Ｕ字状ガラス管を、その両開口部を
斜め上方に位置するように傾斜させて保持し、蛍光体懸
濁液を注入してから傾斜と反対の方向に回転させて蛍光
体懸濁液の排出を行うようにしたものである。The method of this invention involves holding a U-shaped glass tube with both openings tilted upward, injecting a phosphor suspension, and then rotating the tube in the opposite direction to the tilt. It is designed to discharge the phosphor suspension.
この発明の方法においては、Ｕ字状ガラス管を傾斜させ
た状態で蛍光体懸濁液の注入を行うため、各脚部の下方
側となる内面には開口端近傍にまで蛍光体懸濁液の液面
を位置させ得る。In the method of the present invention, the phosphor suspension is injected into the U-shaped glass tube while it is tilted, so the phosphor suspension is injected into the inner surface of the lower side of each leg up to the vicinity of the open end. The liquid level can be located.
そして、この状態でＵ字状ガラス管を傾斜させた側と反
対方向に回転させるので、回転時蛍光体懸濁液の最も流
下量の少ない部分の管壁には、懸濁液注入時にすでに蛍
光体懸濁液が塗布されているため、回転速度を遅くして
も塗り残しが起きにくい。しかも、回転速度が遅くなる
ことによって生じる泡の発生も自動的に抑制されるから
、塗りむらや塗り残し不良を減少させ得る。In this state, the U-shaped glass tube is rotated in the opposite direction to the inclined side, so that when the suspension is injected, the tube wall, which is the part of the tube where the amount of the phosphor suspension is the smallest, is already covered with fluorescent light. Since the body suspension is applied, it is difficult to leave unpainted areas even if the rotation speed is slowed down. In addition, since the generation of bubbles caused by the slow rotation speed is automatically suppressed, uneven coating and uncoated defects can be reduced.
第１図はこの発明の方法の一実施例を示すもので、まず
第１図（Ａ）に示すように、外径２０ｍｍ、脚部長さ４
００ｍ、肉厚ＩＩＩＩＩＩのＵ字状ガラス管（１）を、
各脚部の中心を通る面を鉛直面に沿わせ、さらにその両
端開口（１１）、（１２）が斜め上方に向くように軸線
を鉛直に対し１５°傾けてホルダー（２）で保持する。FIG. 1 shows an embodiment of the method of the present invention. First, as shown in FIG. 1(A), an outer diameter of 20 mm and a leg length of 4
00m, U-shaped glass tube (1) with wall thickness III,
It is held in a holder (2) with the axis line inclined at 15 degrees to the vertical so that the plane passing through the center of each leg is along the vertical plane, and the openings (11) and (12) at both ends thereof face obliquely upward.
つぎに、第１図（Ｂ）に示すように、ノズル（５）から
Ｕ字状ガラス管（１）内に、水にポリエチレンオキサイ
ドを溶解し、これに蛍光体を分散させ、小量の界面活性
剤を加えた蛍光体懸濁液（３）を注入する。このとき、
注入する蛍光体懸濁液（３）は、Ｕ字状ガラス管＋１）
各脚部の下方側となる内管壁面に沿うようにする。そし
て、蛍光体懸濁液（３）の液面の最高位置が開口（１２
）端から３０＋ｗ のところまできたとき、注入を止め
、ノズル（４）を引き上げて第１図（Ｃ）に示す矢印の
方向に、３０°／ｓｅｃの角速度で、開口（１１）、（
１２）が真下にくる第１図（Ｄ）の状態になるまで回転
させ、蛍光体懸濁液（３）を排出させた後、乾燥工程に
移す。なお、このときの回転面は鉛直面に沿って行う。Next, as shown in FIG. 1(B), polyethylene oxide is dissolved in water and phosphor is dispersed in it, and a small amount of interface Inject the phosphor suspension (3) with activator. At this time,
The phosphor suspension (3) to be injected is placed in a U-shaped glass tube + 1)
It should be along the inner tube wall surface which is the lower side of each leg. Then, the highest position of the liquid level of the phosphor suspension (3) is the opening (12).
) When reaching 30+w from the end, stop the injection, pull up the nozzle (4), and open the opening (11), (
12) is at the bottom as shown in FIG. 1(D), and after discharging the phosphor suspension (3), it is moved to the drying step. Note that the rotation plane at this time is along the vertical plane.
この回転させろ過程で、Ｕ字状ガラス管（１１内の蛍光
体９ｆｆｉ液（３）は、そのほとんどが第１図（Ｃ）に
示すように、一方の開口（１１）から流出するので、他
方側の開口（１２）付近の上方側内壁（蛍光体懸濁液注
入時には下方側）部分にはほとんど流下はない。しかし
、この部分は蛍光体懸濁液（３）を注入するとき、第１
図（Ｂ）に示すように蛍光体懸濁液（３）が塗布されて
いるため、塗り残しとはならない。During this rotation process, most of the phosphor 9ffi liquid (3) in the U-shaped glass tube (11) flows out from one opening (11), as shown in Figure 1 (C), and the other There is almost no flow on the upper side inner wall (lower side when injecting the phosphor suspension) near the side opening (12).However, when injecting the phosphor suspension (3), this part
As shown in Figure (B), since the phosphor suspension (3) is applied, there is no unpainted area.
上記実施例において、Ｕ字状ガラス管（１）を回転させ
るのに、その回転面をＵ字状ガラス管（１）の両脚部の
中心を通る鉛直面に沿った面にしたが、蛍光体懸濁液（
３）の排出途中で両開口（１１）、（１２）が塞がれる
第２図（Ｃ）のような状態を避けるには、上記の回転面
で回転させるのが最も良い。In the above embodiment, when rotating the U-shaped glass tube (1), the plane of rotation was set along a vertical plane passing through the center of both legs of the U-shaped glass tube (1), but the phosphor Suspension (
In order to avoid the situation as shown in FIG. 2(C) where both the openings (11) and (12) are blocked during the discharge in step 3), it is best to rotate on the above-mentioned rotation plane.
また、蛍光体懸濁液（３）を注入するときのＵ字状ガラ
ス管（１）の傾斜角を１５°とし、蛍光体懸濁液（３）
を排出するときの回転速度を３０°／ｓｅｃとしたが、
これらはいずれもＵ字状ガラス管（１）の内径および長
さによって最適条件を決める必要がある。In addition, the inclination angle of the U-shaped glass tube (1) when injecting the phosphor suspension (3) was set to 15°, and the phosphor suspension (3)
The rotational speed when discharging was set to 30°/sec,
In all of these cases, it is necessary to determine the optimum conditions depending on the inner diameter and length of the U-shaped glass tube (1).
また、Ｕ字状ガラス管に内壁に沿って蛍光体懸濁液を注
入するのは、たとえば、溶剤として水を°使った発泡性
の高い蛍光体懸濁液を使用する場合、注入時の泡発生の
防止に寄与できる。Injecting the phosphor suspension along the inner wall of the U-shaped glass tube is also important because, for example, when using a highly foaming phosphor suspension that uses water as a solvent, bubbles may form during injection. It can contribute to prevention of occurrence.
以上述べたように、この発明は、Ｕ字状ガラス管を、両
脚部の中心を通る面を鉛直面に沿わせるとともに、その
両開口部を斜め上方に位置するように傾斜させて保持し
、この状態で蛍光体懸濁液を注入してから傾斜と反対の
方向に回転させてガラス管内の蛍光体懸濁液を排出する
ことにより、回転速度を遅めても塗り残し不良が発生せ
ず、しかも回転速度が遅いので蛍光体懸濁液排出時の泡
の発生による塗りむらも解消できる効果がある。As described above, the present invention holds a U-shaped glass tube so that the plane passing through the center of both legs is along a vertical plane, and both openings thereof are inclined so as to be positioned diagonally upward. By injecting the phosphor suspension in this state and then rotating it in the opposite direction to the tilt to discharge the phosphor suspension inside the glass tube, no unpainted defects will occur even if the rotation speed is slowed down. Moreover, since the rotation speed is slow, uneven coating due to the generation of bubbles when the phosphor suspension is discharged can be eliminated.
第１図は乙の発明の方法を工程順に示した工程図、第２
図は従来の方法を工程順に示す工程図である。
図において、（１）はＵ字状ガラス管、（３）は蛍光体
懸濁液、（］１）、（１２）は開口である。
なお、各図中同一符号は同一または相当部分を示す。Figure 1 is a process diagram showing the method of Party B's invention in the order of steps;
The figure is a process chart showing a conventional method in order of steps. In the figure, (1) is a U-shaped glass tube, (3) is a phosphor suspension, and (]1) and (12) are openings. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
を通る面を鉛直面に沿わせるとともに、両脚部端の開口
が上方に位置しかつその両脚部の軸線が鉛直に対し一方
向に傾いた状態で保持し、次いで上記開口より上記Ｕ字
状ガラス管内に所定量の蛍光体懸濁液を注入し、この後
上記Ｕ字状ガラス管を鉛直面に沿わせながら上記傾き方
向と逆方向に回転させ、その開口より上記蛍光体懸濁液
を排出するようにしたことを特徴とするＵ字状蛍光ラン
プの蛍光体塗布方法。A U-shaped glass tube is arranged so that the plane passing through the center of both legs of the U-shaped glass tube is along a vertical plane, the openings at the ends of both legs are located upward, and the axes of both legs are aligned with the vertical. Then, a predetermined amount of the phosphor suspension is injected into the U-shaped glass tube through the opening, and then the U-shaped glass tube is held in the tilted direction while being aligned along the vertical plane. A method for coating a phosphor in a U-shaped fluorescent lamp, characterized in that the phosphor suspension is discharged from an opening of the phosphor by rotating the phosphor in the opposite direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62277860A JPH01120727A (en) | 1987-11-02 | 1987-11-02 | Phosphor coating method for u-shaped fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62277860A JPH01120727A (en) | 1987-11-02 | 1987-11-02 | Phosphor coating method for u-shaped fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01120727A true JPH01120727A (en) | 1989-05-12 |
Family
ID=17589293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62277860A Pending JPH01120727A (en) | 1987-11-02 | 1987-11-02 | Phosphor coating method for u-shaped fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01120727A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998057346A1 (en) * | 1997-06-10 | 1998-12-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method and device for washing and drying glass tubes for lamps |
-
1987
- 1987-11-02 JP JP62277860A patent/JPH01120727A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998057346A1 (en) * | 1997-06-10 | 1998-12-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Method and device for washing and drying glass tubes for lamps |
| US6187373B1 (en) | 1997-06-10 | 2001-02-13 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Method and device for washing and drying glass tubes for lamps |
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