JPH0131663B2 - - Google Patents
Info
- Publication number
- JPH0131663B2 JPH0131663B2 JP55176535A JP17653580A JPH0131663B2 JP H0131663 B2 JPH0131663 B2 JP H0131663B2 JP 55176535 A JP55176535 A JP 55176535A JP 17653580 A JP17653580 A JP 17653580A JP H0131663 B2 JPH0131663 B2 JP H0131663B2
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- wire
- lead
- glass
- sealing part
- 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
Links
- 239000011521 glass Substances 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000006060 molten glass Substances 0.000 claims 1
- 239000011888 foil Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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】
本発明は電球封止部の形成方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming a light bulb seal.
一般に電球においては、導電部材が貫通して伸
びるガラス製封体の封止部において充分な気密性
が得られることが必要であるが、電球の製造工程
の中でもこの封止部の形成は就中困難であり、特
に通常封体ガラスと導電部材の材質の熱膨脹率が
異なること或いは両者の馴染みがよくないこと等
から、両者を直接気密に密着することができず、
このため封止部の形成において特別な構造が必要
とされている。 Generally, in light bulbs, it is necessary to obtain sufficient airtightness at the sealing part of the glass enclosure through which the conductive member extends, but the formation of this sealing part is particularly important in the light bulb manufacturing process. This is difficult, especially because the thermal expansion coefficients of the materials of the normal sealing glass and the conductive member are different, or the two do not fit well, so it is not possible to directly connect the two in an airtight manner.
Therefore, a special structure is required in forming the sealing part.
即ち、従来においては、例えば第１図に示すよ
うに、モリブデンより成る金属箔１の両端部に内
部導入線２と外部導入線３とを溶接して導電部材
を構成せしめ、この導電部材を、封体材料である
ガラス管４の封止部形成端部５内に前記金属箔１
が位置するよう、前記ガラス管４と共に保持し、
前記ガラス管４の封止部形成端部５を加熱して軟
化せしめた後これを前記金属箔１の両面方向から
例えばピンチシール機６により圧接せしめること
により、第２図イ及びロに示すように前記金属箔
１の両面に封止部形成端部５のガラスを密着せし
めて電球封止部７を形成するようにしている。 That is, conventionally, as shown in FIG. 1, for example, a conductive member is constructed by welding an internal lead-in wire 2 and an external lead-in wire 3 to both ends of a metal foil 1 made of molybdenum. The metal foil 1 is placed inside the sealing part forming end 5 of the glass tube 4 which is the sealing material.
is held together with the glass tube 4 so that the
After heating and softening the sealing portion forming end 5 of the glass tube 4, it is pressed against both sides of the metal foil 1 using, for example, a pinch sealing machine 6, thereby forming a seal as shown in FIGS. 2A and 2B. Then, the glass of the sealing part forming end 5 is brought into close contact with both surfaces of the metal foil 1 to form the bulb sealing part 7.
しかしながら斯かる方法による電球封止部７の
形成においては、封止部形成端部のガラスを強制
的に変形せしめることから、形成される電球封止
部７のガラスに不可避的に歪が生じ、この歪がク
ラツクを発生せしめる原因となつて長い使用寿命
が得られず、しかも電球封止部７を形成すること
となる封止部形成端部５内に金属箔１が適切に位
置されることが必要であつてこの金属箔１の位置
決め作業に特に高い精度が要求されると共に、導
電部材を金属箔１と導入線２，３との溶接接合体
により構成する必要があり、これらの結果電球の
製造工程が全体として複雑になる欠点がある。 However, in forming the bulb sealing part 7 by such a method, since the glass at the sealing part forming end is forcibly deformed, distortion inevitably occurs in the glass of the bulb sealing part 7 to be formed. This distortion causes cracks to occur, making it impossible to obtain a long service life.Moreover, the metal foil 1 must be properly positioned within the sealing portion forming end 5 where the bulb sealing portion 7 is formed. This requires a particularly high degree of precision in positioning the metal foil 1, and the conductive member must be constructed of a welded assembly of the metal foil 1 and lead-in wires 2 and 3.As a result, the electric bulb The disadvantage is that the manufacturing process as a whole becomes complicated.
また、特開昭53−72389号公報には、導電部材
としてガラスろう付けした導線を用い、電球体材
料であるガラスを加熱溶融して当該導線のガラス
ろう付け部分に密着させて電球封止部を形成する
技術が開示されているが、この技術においても、
導電部材である導線に予めガラスろう付けをする
という特別な構造を形成する工程が必要とされ、
結局、製造工程が全体として複雑になるという欠
点がある。 In addition, Japanese Patent Application Laid-Open No. 53-72389 discloses that a conductive wire brazed with glass is used as a conductive member, and glass, which is the material of the light bulb body, is heated and melted to tightly adhere to the glass brazed portion of the conductive wire to seal the light bulb. has been disclosed, but in this technology as well,
A special process is required to form a special structure by glass-brazing the conductive wire, which is a conductive member, in advance.
As a result, the manufacturing process becomes complicated as a whole.
本発明は以上のような欠点を除き、導電部材と
して特別な構造を必要とせず、しかも簡単な方法
により、形成される電球封止部のガラスに歪が生
ずることがなくしかも充分な気密性が得られる電
球封止部の形成方法を提供することを目的とす
る。 The present invention eliminates the above-mentioned drawbacks, does not require any special structure as a conductive member, uses a simple method, does not cause distortion in the glass of the bulb sealing part, and provides sufficient airtightness. It is an object of the present invention to provide a method for forming the resulting light bulb sealing part.
以下図面によつて本発明の一実施例を説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
本発明においては、第３図に示すように、電球
封体材料として熱膨張係数が42〜42.5×10-7／℃
のアルミナシリケートより成るガラス管４を用
い、これをその管軸Ｘが鉛直となるよう保持する
と共に、モリブデンより成る棒状の導入線８を前
記ガラス管４の内部から前記管軸Ｘに沿つて当該
ガラス管４の下端開口９より突出するように保持
せしめ、そしてこの状態で前記導入線８を囲繞す
る前記ガラス管４の下端部分１０の外周面を例え
ば酸素・プロパンガスのガスバーナー１１によ
り、酸化防止用保護ガスとしての窒素ガス雰囲気
下において加熱することにより溶融せしめ、更に
加熱を継続して電球封止部７を形成する。すなわ
ち、ピンチシール機を用いずに電球封止部７を形
成する。 In the present invention, as shown in FIG .
A glass tube 4 made of alumina silicate is used, held so that its tube axis The glass tube 4 is held so as to protrude from the lower end opening 9, and in this state, the outer peripheral surface of the lower end portion 10 of the glass tube 4 surrounding the lead-in wire 8 is oxidized by a gas burner 11 of oxygen/propane gas, for example. It is melted by heating in an atmosphere of nitrogen gas as a protective gas for prevention, and further heating is continued to form the bulb sealing part 7. That is, the bulb sealing portion 7 is formed without using a pinch sealing machine.
以上において、導入線８が棒状であるとは、扁
平部、溶接部等を有さぬ単一若しくは一様な状態
をいう。 In the above description, the introduction wire 8 being rod-shaped means that it is single or uniform without having a flat part, a welded part, or the like.
本発明は以上のような方法であるから、ガラス
管４の下端部分１０がガスバーナー１１により加
熱溶融される結果、第４図に示すように、加熱溶
融されたガラスがその表面張力によつて肉厚を増
しながら次第に大きな溶融塊となり、下端開口９
を塞ぐ方向に成長する。そして遂にはこの溶融塊
が棒状の導入線８と接触するようになり、更に第
５図に示すように導入線８の前記下端部分１０に
囲繞されていた部分の外周面に全周に亘つて密着
して下端開口９を塞ぐようになる。 Since the present invention employs the method described above, as a result of heating and melting the lower end portion 10 of the glass tube 4 with the gas burner 11, as shown in FIG. As the wall thickness increases, it gradually becomes a larger molten mass, and the lower end opening 9
It grows in the direction that blocks it. Finally, this molten mass comes into contact with the rod-shaped lead-in wire 8, and as shown in FIG. They come into close contact and close the lower end opening 9.
而して、本発明においては、ガラス管４が、熱
膨張係数が42〜42.5×10-7／℃のアルミナシリケ
ートより成るものであるため、モリブデンより成
る導入線８と極めて馴染みがよいことから、上述
の加熱を継続することのみで、前記溶融塊が導入
線８の前記ガラス管４の下端部分１０に囲繞され
ていた部分に接触して下端開口９が塞がれるよう
になる。従つて、導電部材として金属箔の溶接接
合体あるいはガラスろう付けした導入線等の特別
な構造やピンチシールなどの特別の手段を必要と
することなく充分な気密性を有する電球封止部７
を形成することができる。しかもこのようにして
形成される電球封止部７は、何ら強制的な変形を
受けていないため歪のないものである。そして、
熱膨張係数が42〜42.5×10-7／℃のアルミナシリ
ケートより成るガラスとモリブデンとはその熱膨
張係数が極めて近似していることから、電球の製
造時或いは点灯時等における当該電球封止部７の
温度変化に対しても気密性が損われることがな
い。 Therefore, in the present invention, since the glass tube 4 is made of alumina silicate with a coefficient of thermal expansion of 42 to 42.5×10 -7 /°C, it is extremely compatible with the lead-in wire 8 made of molybdenum. By simply continuing the heating described above, the molten mass comes into contact with the portion of the lead-in wire 8 that was surrounded by the lower end portion 10 of the glass tube 4, and the lower end opening 9 is closed. Therefore, the bulb sealing part 7 has sufficient airtightness without requiring any special structure such as a welded metal foil joint or a glass brazed lead-in wire as a conductive member, or any special means such as a pinch seal.
can be formed. Furthermore, the bulb sealing portion 7 formed in this manner is free from distortion because it is not subjected to any forced deformation. and,
Glass made of alumina silicate, which has a thermal expansion coefficient of 42 to 42.5×10 -7 /°C, and molybdenum have very similar thermal expansion coefficients. The airtightness is not impaired even under temperature changes of 7.
更に本発明においては、導電部材として、金属
箔１の溶接接合体等の複雑な構造のものを必要と
せずに棒状の導入線８のみでよいこと、電球封止
部７のガラスが歪を有しないためアニーリングが
不要であること、導電部材として導入線８のみで
よくしかもこれが棒状であるから電球封止部形成
工程において、当該導入線８を容易にしかも確実
にガラス管４の管軸Ｘ上に保持することができる
こと、及び導入線８が棒状であるのでその封止さ
れるべき部分が長さ方向について特に限定されな
いこと等から、電球の製造工程が全体として大幅
に簡略化される。 Furthermore, the present invention does not require a complicated structure such as a welded joint of metal foil 1 as a conductive member, and only a rod-shaped lead-in wire 8 is sufficient, and the glass of the bulb sealing part 7 has no distortion. In addition, since it is rod-shaped, the lead-in wire 8 can be easily and reliably aligned on the tube axis X of the glass tube 4 in the process of forming the bulb sealing part. Since the lead-in wire 8 is rod-shaped, the portion to be sealed is not particularly limited in the length direction, and the manufacturing process of the light bulb is greatly simplified as a whole.
ここで本発明に用いる熱膨張係数が42〜42.5×
10-7／℃のアルミナシリケートより成るガラスの
具体的製品例としては、コーニング社製のコーニ
ング規格1720（熱膨張係数；42×10-7／℃）若し
くは1725（熱膨張係数；42.5×10-7／℃）等を挙
げることができ、モリブデンより成る導入線８と
してはその表面が予め平滑化されていることが好
ましく、例えばリン酸系溶液等により電解研磨を
行なつて表面の平滑化を達成しておくのが望まし
い。 Here, the thermal expansion coefficient used in the present invention is 42 to 42.5×
As a specific example of a glass made of alumina silicate with a temperature of 10 -7 /℃, Corning standard 1720 (coefficient of thermal expansion; 42×10 -7 /℃) or 1725 (coefficient of thermal expansion; 42.5×10 - It is preferable that the surface of the lead-in wire 8 made of molybdenum be smoothed in advance.For example, the surface may be smoothed by electropolishing with a phosphoric acid solution or the like. It is desirable to achieve this.
以上述べた電球封止部の形成方法を用いて、ガ
ラス管４として肉厚１mm、内径が６mmのアルミナ
シリケートガラスであるコーニング社製のコーニ
ング規格1720を用い、導入線８としてモリブデン
より成り各々直径が0.4mm、0.6mm、0.8mmの３種を
用いて夫々300本（合計900本）の定格80V、
450Wの複写機用ハロゲン白熱電球を作製したが、
何れにおいてもリークの発生がなく、更に連続
200時間に亘つて点灯せしめたが、何れにおいて
もクラツクの発生は全く見られなかつた。この結
果から明らかなように、本発明方法により作製さ
れた電球封止部は充分な気密性を有し且つ歪のな
いものであることが理解される。更に他の多くの
実験より、本発明の方法は、導入線８の直径が
0.4〜1.2mm、ガラス管４の肉厚が0.5〜1.5mm、ガ
ラス管４の外径が最大12mmまでの範囲で確実に適
用できることが判明した。 Using the method for forming the bulb sealing part described above, the glass tube 4 was made of Corning Standard 1720 made of alumina silicate glass with a wall thickness of 1 mm and an inner diameter of 6 mm, and the lead-in wires 8 were made of molybdenum, each having a diameter of 1 mm. Using three types of 0.4mm, 0.6mm, and 0.8mm, 300 each (900 in total) rated at 80V,
I made a 450W halogen incandescent light bulb for copying machines, but
No leaks occur in any case, and continuous operation is possible.
Although the lights were turned on for 200 hours, no cracks were observed at all. As is clear from these results, it is understood that the bulb sealing part produced by the method of the present invention has sufficient airtightness and is free from distortion. Further, many other experiments have shown that the method of the present invention is effective when the diameter of the lead-in wire 8 is
It has been found that it can be reliably applied in the range of 0.4 to 1.2 mm, the wall thickness of the glass tube 4 is 0.5 to 1.5 mm, and the outer diameter of the glass tube 4 is up to 12 mm.
以上のように本発明によれば、導電部材として
特別な構造を必要とせず、しかも簡単な方法によ
り、形成される電球封止部のガラスに歪が生ずる
ことがなくしかも充分な気密性が得られる電球封
止部の形成方法を提供することができる。 As described above, according to the present invention, there is no need for a special structure as a conductive member, and moreover, it is possible to obtain sufficient airtightness without causing distortion in the glass of the bulb sealing part by using a simple method. It is possible to provide a method for forming a light bulb sealing part.
第１図は従来の電球封止部の形成についての説
明用縦断側面図、第２図イ及びロはそれぞれ従来
の電球封止部の形成方法により形成された電球封
止部の説明用縦断側面図及び説明用縦断正面図、
第３図及び第４図は本発明電球封止部の形成方法
を工程順に示す説明用縦断正面図、第５図は本発
明電球封止部の形成方法により形成された電球封
止部を示す説明用縦断正面図である。
１……金属箔、２……内部導入線、３……外部
導入線、４……ガラス管、７……電球封止部、８
……導入線、９……下端開口、１０……下端部
分、１１……ガスバーナー。
FIG. 1 is an explanatory longitudinal side view of the formation of a conventional bulb sealing portion, and FIG. Longitudinal front view for illustration and explanation;
3 and 4 are explanatory longitudinal sectional front views showing the method for forming a light bulb sealing part of the present invention in the order of steps, and FIG. 5 shows a light bulb sealing part formed by the method of forming a light bulb sealing part of the present invention. FIG. 2 is a longitudinal sectional front view for explanation. 1...Metal foil, 2...Internal lead-in wire, 3...External lead-in wire, 4...Glass tube, 7...Light bulb sealing part, 8
... Lead-in wire, 9 ... Lower end opening, 10 ... Lower end portion, 11 ... Gas burner.
Claims (1)
10-7／℃のアルミナシリケートより成るガラス管
をその管軸が鉛直となるよう保持すると共に、モ
リブデンより成る棒状の導入線を前記ガラス管の
内部から前記管軸に沿つて当該ガラス管の下端開
口より突出するよう保持し、前記導入線を囲繞す
る前記ガラス管の下端部分を、溶融したガラスの
表面張力により形成される溶融塊が当該導入線の
外周面に密着してガラス管の下端開口が塞がれる
よう、当該ガラス管の外周からガスバーナーで加
熱溶融せしめることにより電球封止部を形成する
ことを特徴とする電球封止部の形成方法。1 The thermal expansion coefficient of the bulb enclosure material is 42 to 42.5×
A glass tube made of alumina silicate with a temperature of 10 -7 /℃ is held so that its tube axis is vertical, and a rod-shaped lead-in wire made of molybdenum is inserted from the inside of the glass tube along the tube axis to the lower end of the glass tube. The glass tube is held so as to protrude from the opening, and the lower end portion of the glass tube surrounding the lead-in wire is held so that the molten lump formed by the surface tension of the molten glass adheres to the outer peripheral surface of the lead-in wire, and the lower end portion of the glass tube surrounding the lead-in wire is held so as to protrude from the opening. 1. A method for forming a light bulb sealing part, which comprises forming a light bulb sealing part by heating and melting the glass tube from the outer periphery with a gas burner so that the glass tube is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17653580A JPS57101320A (en) | 1980-12-16 | 1980-12-16 | Forming method of bulb encapsulating section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17653580A JPS57101320A (en) | 1980-12-16 | 1980-12-16 | Forming method of bulb encapsulating section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57101320A JPS57101320A (en) | 1982-06-23 |
| JPH0131663B2 true JPH0131663B2 (en) | 1989-06-27 |
Family
ID=16015298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17653580A Granted JPS57101320A (en) | 1980-12-16 | 1980-12-16 | Forming method of bulb encapsulating section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57101320A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6062766U (en) * | 1983-10-05 | 1985-05-02 | ウシオ電機株式会社 | tubular halogen incandescent light bulb |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5372389A (en) * | 1976-12-08 | 1978-06-27 | Toshiba Corp | Incandescent lamp and method of manufacturing the same |
| JPS54141081A (en) * | 1978-04-20 | 1979-11-01 | Philips Nv | Bulb |
-
1980
- 1980-12-16 JP JP17653580A patent/JPS57101320A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5372389A (en) * | 1976-12-08 | 1978-06-27 | Toshiba Corp | Incandescent lamp and method of manufacturing the same |
| JPS54141081A (en) * | 1978-04-20 | 1979-11-01 | Philips Nv | Bulb |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57101320A (en) | 1982-06-23 |
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