JPH0675370B2 - Method of manufacturing discharge lamp arc tube - Google Patents
Method of manufacturing discharge lamp arc tubeInfo
- Publication number
- JPH0675370B2 JPH0675370B2 JP60105196A JP10519685A JPH0675370B2 JP H0675370 B2 JPH0675370 B2 JP H0675370B2 JP 60105196 A JP60105196 A JP 60105196A JP 10519685 A JP10519685 A JP 10519685A JP H0675370 B2 JPH0675370 B2 JP H0675370B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- heating element
- discharge lamp
- conductor
- manufacturing
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は放電ランプ発光管の製造方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a discharge lamp arc tube.
従来の技術 単結晶または多結晶アルミナからなる発光管容囲器は、
高圧ナトリウムランプ等の放電ランプの発光管に用いら
れている。2. Description of the Related Art Arc tube enclosures made of single crystal or polycrystalline alumina are
It is used in the arc tube of discharge lamps such as high-pressure sodium lamps.
ところで、単結晶または多結晶アルミナは軟化点が2015
℃であって融点とほぼ同じであるため、石英ガラスと異
なり、軟化点まで加熱しピンチするという方法を採用す
ることができないことはよく知られている。このため、
従来は円筒状の発熱体内に、発光管容囲器，フリットリ
ングおよび導電体を有する組立構体を一つまたは複数配
置し、外部から発熱体を誘導加熱することにより、発熱
体を昇温させ、フリットリングを溶融させて、発光管容
囲器の端部に導電体を封着するという方法を採用してい
る。しかしながら、この方法は組立構体が一つの場合に
は発熱体からの輻射熱がほぼ均一になるため問題はない
が、低ワット（400W以下）等の放電ランプの場合にはコ
スト低減の面から発熱体内に複数の組立構体を配置する
ことが多く、この場合には発熱体に近いフリットリング
の部分が早期に溶融し、発熱体から遠いフリットリング
の部分は溶融し難く、したがってフリットリングの溶融
が不均一となり、複数本の発光管容囲器の端部に導電体
を気密に同時封着することができないことがあった。By the way, single-crystal or polycrystalline alumina has a softening point of 2015.
It is well known that the method of heating to the softening point and pinching cannot be adopted, unlike quartz glass, because the temperature is ℃ and is almost the same as the melting point. For this reason,
Conventionally, one or more assembly structures having an arc tube enclosure, a frit ring, and a conductor are arranged in a cylindrical heating element, and the heating element is heated from the outside by induction heating. A method is used in which the frit ring is melted and a conductor is sealed at the end of the arc tube envelope. However, this method does not cause a problem because the radiant heat from the heating element becomes almost uniform when there is only one assembly structure, but in the case of a discharge lamp with a low wattage (400 W or less), the heating element can be reduced in cost. It is often the case that a plurality of assembly structures are arranged on the frit ring.In this case, the frit ring portion near the heating element melts early and the frit ring portion far from the heating element does not melt easily. In some cases, the conductors become uniform, and the conductors cannot be hermetically sealed at the ends of the plurality of arc tube envelopes.
そこで、発明者はこのような問題を解決するために、先
に、発熱体として、その中心からの距離が等しく、かつ
周方向の相互間隔が等しく位置するよう、直径の大きさ
が同じである複数個の円孔を形成し、さらに前記発熱体
の外形が各円孔の外側に形成される同心円の一部を順次
連結して形成された形状を有し、かつ前記発熱体の中央
部に別の孔を形成し、前記発光管容囲器、前記フリット
リングおよび前記導電体を有する組立構体を前記複数個
の孔に一つずつ配置し、外部から前記発熱体を誘導加熱
することにより前記フリットリングを溶融して前記発光
管容囲器の端部に前記導電体を封着する放電ランプ発光
管の製造方法を提案した。Therefore, in order to solve such a problem, the inventor first has the same diameter as the heating element so that the distance from the center of the heating element is equal and the mutual intervals in the circumferential direction are equal. A plurality of circular holes are formed, and the outer shape of the heating element has a shape formed by sequentially connecting a part of concentric circles formed on the outside of each circular hole, and at the center of the heating element. Another hole is formed, one assembly structure including the arc tube enclosure, the frit ring, and the conductor is arranged in the plurality of holes, respectively, and the heating element is induction-heated from the outside. A method of manufacturing a discharge lamp arc tube in which a frit ring is melted and the conductor is sealed at the end of the arc tube envelope is proposed.
発明が解決しようとする問題点 しかし、この方法は短時間に複数の発光管容囲器を封着
することができる利点があり、発熱体の昇温時には問題
がないが、発熱体の降温時に問題があることが判明し
た。すなわち、発熱体の温度を下降させる時、約1400℃
の最高温度まで上昇した発光管容囲器の温度下降速度は
発熱体の温度下降速度に比べて遅いので、発光管容囲器
に歪が発生するのを防止するため、発熱体を誘導加熱し
て徐々に降温させて発光管容囲器の温度とほぼ同じにす
る必要があり、このための誘導加熱装置が別途必要とな
り、したがって製造装置が複雑かつ高価になるという問
題点があった。Problems to be Solved by the Invention However, this method has an advantage that a plurality of arc tube envelopes can be sealed in a short time, and there is no problem when the heating element is heated, but when the heating element is cooled, It turned out to be a problem. That is, when lowering the temperature of the heating element, about 1400 ℃
Since the temperature falling speed of the arc tube enclosure that has risen to the maximum temperature is slower than the temperature falling speed of the heating element, in order to prevent distortion in the arc tube envelope, the heating element is induction heated. Therefore, it is necessary to gradually lower the temperature so that the temperature is almost the same as the temperature of the arc tube envelope, and a separate induction heating device is required for this purpose, so that the manufacturing device becomes complicated and expensive.
本発明は複数本の発光管容囲器の端部にフリットリング
を用いて導電体を同時封着する場合に、加熱時間を短縮
しつつ、複数個のフリットリングを同時に均一に溶融す
ることができ、よってこれらの発光管容囲器の端部に導
電体を気密に同時封着することができ、生産性がよく、
さらに降温時に発熱体を誘導加熱しなくてすむ放電ラン
プ発光管の製造方法を提供するものである。The present invention is capable of simultaneously melting a plurality of frit rings at the same time while shortening the heating time when the conductors are simultaneously sealed by using the frit rings at the ends of the plurality of arc tube envelopes. Therefore, it is possible to hermetically seal the electric conductors to the end portions of these arc tube envelopes at the same time, resulting in good productivity,
Further, the present invention provides a method of manufacturing a discharge lamp arc tube which does not require induction heating of a heating element when the temperature is lowered.
問題点を解決するための手段 本発明は単結晶また多結晶アルミナからなる発光管容囲
器の端部に、先端に電極を有する導電体をフリットリン
グを用いて封着する放電ランプ発光管の製造方法であっ
て、発熱体にその中心からの距離が等しく、かつ周方向
の相互間隔が等しくなるよう、同一の大きさの直径を有
する複数個の円孔を形成し、前記発熱体の外形は、隣合
う円孔の間付近に外側から前記円孔に沿う切り込みがそ
れぞれ入れられ、かつこれら切り込み間に位置する部分
の円孔周囲の肉厚が前記切り込み部分の円孔周囲の肉厚
よりも厚くなった形状を有しており、さらに前記発熱体
の中央部に別の孔を形成し、前記発光管容囲器、前記フ
リットリング、および前記導電体を有する組立構体を前
記複数個の円孔内に一つずつ配置し、外部から前記発熱
体を誘導加熱することにより前記フリットリングを溶融
させて前記発光管容囲器の端部に前記誘電体を封着する
放電ランプ発光管の製造方法を特徴とするものである。Means for Solving the Problems The present invention relates to a discharge lamp arc tube in which a conductor having an electrode at the tip is sealed at the end of an arc tube envelope made of single crystal or polycrystalline alumina by using a frit ring. In the manufacturing method, a plurality of circular holes having the same diameter are formed in the heating element so that the distance from the center of the heating element is equal and the mutual intervals in the circumferential direction are equal to each other. Is a notch along the circular hole from the outside in the vicinity of between the adjacent circular holes, and the wall thickness around the circular hole of the portion located between these notches is less than the wall thickness around the circular hole at the cut portion. Has a thickened shape, and further has another hole formed in the central portion of the heating element, and the assembly structure having the arc tube enclosure, the frit ring, and the conductor is formed into the plurality of assembly structures. Place each one in a circular hole and In addition, the method for manufacturing a discharge lamp arc tube is characterized in that the frit ring is melted by inductively heating the heating element to seal the dielectric at the end of the arc tube envelope.
作 用 前記の形状を有する発熱体を用いることにより、発熱体
の温度下降速度を遅らすことができ、その結果発熱体の
温度下降遅度を発光管容囲器の温度下降速度とほぼ同じ
くすることができる。Operation By using the heating element having the above-mentioned shape, it is possible to delay the temperature lowering rate of the heating element, and as a result, the temperature lowering rate of the heating element should be approximately the same as the temperature lowering rate of the arc envelope. You can
実施例 以下、本発明の一実施例について図面を用いて説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図および第２図は本発明の放電ランプ発光管の製造
方法を実施するために用いる発熱体の一例を示す平面図
および縦断面図である。発熱体１は主として炭素からな
り、最大外径44mm,高さ20mmである。この発熱体１には
その中心Ｏからの距離が等しく、かつ周方向の相互間隔
Ａが等しくなるよう、直径の大きさが同一（直径10mm）
である複数個の円孔２が形成されている。すなわち、発
熱体１の中心Ｏから円孔２の中心Ｏ′までの距離は13m
m、また中心Ｏと中心Ｏ′とを結ぶ相隣る二直線のなす
角θは互いに等しく、60度である。さらに、発熱体１の
中央部には直径11mmの別の円孔３が形成されて、発熱体
１の熱容量を減少させている。発熱体１の外形は、隣合
う円孔２の間付近に外側から切り込み４が入られら、か
つこれら切り込み間に位置する部分の円孔２の周囲の肉
厚が切り込み４の部分の円孔２の肉厚より厚くなった形
状を有している。前者の肉厚は最大4mm、後者の肉厚は
最小2.2mmである。そして、円孔２内に単結晶アルミナ
からなる外径6mmの発光管容囲器５、フリットリング６
および管状の導電体７を有する組立構体を一つずつ配置
する。フリットリング６は酸化アルミニウム（Al
2O3）、酸化イットリウム（Y2O3）、酸化マグネシウム
（MgO）および酸化カルシウム（CaO）からなり、融点が
約1365℃である。導電体７の先端には電極８が設けられ
ている。1 and 2 are a plan view and a vertical sectional view showing an example of a heating element used for carrying out the method for manufacturing a discharge lamp arc tube according to the present invention. The heating element 1 is mainly made of carbon and has a maximum outer diameter of 44 mm and a height of 20 mm. The heating element 1 has the same diameter (diameter 10 mm) so that the distance from the center O is equal and the mutual distance A in the circumferential direction is equal.
A plurality of circular holes 2 are formed. That is, the distance from the center O of the heating element 1 to the center O'of the circular hole 2 is 13 m.
The angles θ formed by two adjacent straight lines connecting m and the center O and the center O ′ are equal to each other and are 60 degrees. Further, another circular hole 3 having a diameter of 11 mm is formed in the central portion of the heating element 1 to reduce the heat capacity of the heating element 1. The outer shape of the heating element 1 is such that a notch 4 is inserted from the outside between the adjacent circular holes 2 and the thickness of the perimeter of the circular hole 2 located between these notches is the circular hole at the portion of the notch 4. It has a shape thicker than the wall thickness of 2. The former has a maximum thickness of 4 mm and the latter has a minimum thickness of 2.2 mm. Then, the arc tube enclosure 5 and the frit ring 6 made of single crystal alumina and having an outer diameter of 6 mm are provided in the circular hole 2.
And the assembly structures having the tubular conductors 7 are arranged one by one. The frit ring 6 is made of aluminum oxide (Al
2 O 3 ), yttrium oxide (Y 2 O 3 ), magnesium oxide (MgO) and calcium oxide (CaO), and has a melting point of about 1365 ° C. An electrode 8 is provided at the tip of the conductor 7.
かかる装置を第３図に示すように、真空または不活性ガ
ス雰囲気になっている容器９内に設け、外部から約400K
Hzの高周波電源にて誘導コイル10に電流を流して発熱体
１を第４図の折れ線Ｉに示すように、常温から最高温度
約1500℃まで約５分間で昇温させる。なお、第３図にお
いて、11はサポートを示す。その後、発熱体１を45秒間
最高温度に維持した後、高周波電源からの誘導加熱を中
止した。その結果、発熱体１の温度下降速度は第４図の
折れ線Ｉに示すとおりとなって、発光管容囲器５の温度
下降速度（同図の折れ線II）とほぼ等しくなり、そのた
め発光管容囲器５には歪による割れは発生しなかった。
また、フリットリング６も均一に溶融して、複数個の発
光管容囲器５の端部に導電体７を短時間で気密に同時封
着することができた。第５図に発光管容囲器５の端部に
導電体７を気密封着した状態を示している。As shown in FIG. 3, such a device is provided in a container 9 which is in a vacuum or an inert gas atmosphere, and about 400 K is supplied from the outside.
A current is passed through the induction coil 10 by a high frequency power source of Hz to heat the heating element 1 from room temperature to a maximum temperature of about 1500 ° C. in about 5 minutes as shown by a broken line I in FIG. In FIG. 3, 11 indicates a support. After that, the heating element 1 was maintained at the maximum temperature for 45 seconds, and then the induction heating from the high frequency power supply was stopped. As a result, the temperature lowering speed of the heating element 1 becomes as shown by the broken line I in FIG. 4 and becomes substantially equal to the temperature lowering speed of the arc tube envelope 5 (the broken line II in the same figure), and therefore the arc tube volume is increased. The enclosure 5 did not crack due to strain.
Further, the frit ring 6 was also melted uniformly, and the conductors 7 could be simultaneously hermetically sealed to the end portions of the plurality of arc tube envelopes 5 in a short time. FIG. 5 shows a state in which the conductor 7 is hermetically sealed to the end portion of the arc tube envelope 5.
以後は通常の方法により例えば高圧ナトリウムランプ用
等の発光管を得る。After that, an arc tube for a high pressure sodium lamp or the like is obtained by an ordinary method.
なお、本発明の方法は発光管容囲器内にナトリウム等の
封入物が封入された状態でも適用できるものである。The method of the present invention can also be applied to a state in which an enclosure such as sodium is enclosed in the arc tube envelope.
発明の効果 以上説明したように、本発明は発熱体内に複数本の発光
管容囲器を配置する場合にもフリットリングをほぼ均一
に加熱することができ、よって複数本の発光管容囲器の
端部に導電体を気密に同時に封着することができて、生
産性にすぐれ、さらに降温時に発熱体を誘導加熱しなく
てすむので、装置を簡素化することができ、かつコスト
の低減化を一段と図ることのできる放電ランプ発光管の
製造方法を提供することができるものである。As described above, according to the present invention, even when a plurality of arc tube enclosures are arranged in a heat generating body, the frit ring can be heated almost uniformly, and thus the plurality of arc tube enclosures can be heated. Since the conductors can be hermetically sealed at the same time at the end of the, the productivity is excellent, and since the heating element does not need to be induction-heated when the temperature is lowered, the device can be simplified and the cost can be reduced. It is possible to provide a method of manufacturing a discharge lamp arc tube that can be further improved.
第１図は本発明の放電ランプ発光管の製造方法を実施す
るために用いる発熱体の一例を示す平面図、第２図は第
１図のII−II線断面図、第３図は本発明の放電ランプ発
光管の製造方法を実施するための装置の一例を示す図、
第４図は本発明方法による封着時の発熱体と発光管容囲
器の温度変化を示す図、第５図は発光管容囲器の端部に
導電学を封着した状態を示す一部切欠正面図である。 １……発熱体、2,3……円孔、４……切り込み、５……
発光管容囲器、６……フリットリング、７……導電体、
８……電極、９……容器、10……誘導コイル。FIG. 1 is a plan view showing an example of a heating element used for carrying out the method of manufacturing a discharge lamp arc tube according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. A diagram showing an example of an apparatus for carrying out the method for manufacturing a discharge lamp arc tube of
FIG. 4 is a diagram showing a temperature change of a heating element and an arc tube envelope at the time of sealing by the method of the present invention, and FIG. 5 is a diagram showing a state in which electrical conductivity is sealed at an end portion of the arc tube envelope. It is a partial cutaway front view. 1 ... Heating element, 2, 3 ... Circular hole, 4 ... Notch, 5 ...
Arc tube enclosure, 6 ... Frit ring, 7 ... Conductor,
8 ... Electrode, 9 ... Container, 10 ... Induction coil.
Claims (1)
管容囲器の端部に、先端に電極を有する導電体をフリッ
トリングを用いて封着する放電ランプ発光管の製造方法
であって、発熱体にその中心からの距離が等しく、かつ
周方向の相互間隔が等しくなるよう、同一の大きさの直
径を有する複数個の円孔を形成し、前記発熱体の外形
は、隣合う円孔の間付近に外側から前記円孔に沿う切り
込みがそれぞれ入れられ、かつこれら切り込み間に位置
する部分の円孔周囲の肉厚が前記切り込み部分の円孔周
囲の肉厚より厚くなった形状を有しており、さらに前記
発熱体の中央部に別の孔を形成し、前記発光管容囲器、
前記フリットリング、および前記導電体を有する組立構
体を前記複数個の円孔内に一つずつ配置し、外部から前
記発熱体を誘導加熱することにより前記フリットリング
を溶融させて前記発光管容囲器の端部に前記導電体を封
着することを特徴とする放電ランプ発光管の製造方法。1. A method of manufacturing a discharge lamp arc tube, wherein a conductor having an electrode at its tip is sealed to an end of an arc tube enclosure made of single crystal or polycrystal alumina by using a frit ring. A plurality of circular holes having the same diameter are formed in the heating element so that the distance from the center of the heating element is equal and the intervals in the circumferential direction are equal to each other. A notch along the circular hole is made from the outside in the vicinity of the gap, and the thickness of the portion around the circular hole of the portion located between the notches is thicker than the thickness of the portion around the circular hole. Further, another hole is formed in the central portion of the heating element, and the arc tube envelope,
An assembly structure having the frit ring and the conductor is disposed in the plurality of circular holes one by one, and the heating element is induction-heated from the outside to melt the frit ring and thereby surround the arc tube. A method of manufacturing a discharge lamp arc tube, characterized in that the conductor is sealed at the end of the vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60105196A JPH0675370B2 (en) | 1985-05-17 | 1985-05-17 | Method of manufacturing discharge lamp arc tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60105196A JPH0675370B2 (en) | 1985-05-17 | 1985-05-17 | Method of manufacturing discharge lamp arc tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61264631A JPS61264631A (en) | 1986-11-22 |
| JPH0675370B2 true JPH0675370B2 (en) | 1994-09-21 |
Family
ID=14400913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60105196A Expired - Fee Related JPH0675370B2 (en) | 1985-05-17 | 1985-05-17 | Method of manufacturing discharge lamp arc tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675370B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6976372B2 (en) * | 2002-10-31 | 2005-12-20 | Corning Incorporated | Sealing lighting device component assembly with solder glass preform by using induction heating |
-
1985
- 1985-05-17 JP JP60105196A patent/JPH0675370B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61264631A (en) | 1986-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000277052A (en) | High pressure discharge lamp with base | |
| US3794402A (en) | Method of manufacturing an electric discharge tube or an electric lamp | |
| US6249077B1 (en) | Arc tube, mounting member and electric lamp assembly | |
| JPH0521298B2 (en) | ||
| JPS641897B2 (en) | ||
| US3883763A (en) | Self-controlled arc stream in gaseous discharge lamps | |
| US4713580A (en) | Sealing structure for metal vapor arc discharge lamps | |
| JPH0675370B2 (en) | Method of manufacturing discharge lamp arc tube | |
| US2391572A (en) | Method for producing electronic devices | |
| US2845557A (en) | Arc tube mounting | |
| EP0220813B1 (en) | Method for sealing the discharge tubes of metal halide high pressure discharge lamps | |
| EP0316986B1 (en) | Electrical cooking unit and electrical cooking apparatus provided with this unit | |
| EP0165587B1 (en) | Metal halide discharge lamp with arc tube temperature equalizing means | |
| US3757158A (en) | Sodium vapor lamp having a grooved alumina arc tube | |
| JPH0467734B2 (en) | ||
| JPH0467733B2 (en) | ||
| US2124428A (en) | Metal vacuum tube | |
| US2254845A (en) | Mount for quartz lamps | |
| US2142841A (en) | Insulating leading-in conductor | |
| JPH0520256U (en) | High pressure gas discharge lamp | |
| JP2668831B2 (en) | Miniature lamp manufacturing method | |
| US2291952A (en) | Quartz lamp | |
| US3320352A (en) | Quartz-to-metal seal | |
| JP2650190B2 (en) | Manufacturing method of high power incandescent lamp | |
| JPH04141930A (en) | Sealing method of emission tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |