JPH0620649A - Translucent bulb of metal-vapor discharge lamp and manufacture thereof - Google Patents
Translucent bulb of metal-vapor discharge lamp and manufacture thereofInfo
- Publication number
- JPH0620649A JPH0620649A JP20047392A JP20047392A JPH0620649A JP H0620649 A JPH0620649 A JP H0620649A JP 20047392 A JP20047392 A JP 20047392A JP 20047392 A JP20047392 A JP 20047392A JP H0620649 A JPH0620649 A JP H0620649A
- Authority
- JP
- Japan
- Prior art keywords
- bulb
- light emitting
- emitting surface
- light
- translucent
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属蒸気放電灯の外管内
に組み込まれる透光性バルブとその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a translucent bulb which is incorporated in the outer tube of a metal vapor discharge lamp and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】熱陰極アーク放電の陽極柱での水銀の励
起発光を利用した水銀ランプ、水銀熱陰極アーク放電に
よる熱で金属ハロゲン化物を蒸発させて金属とハロゲン
に解離せしめ、金属特有の色を呈する発光を行なわせる
ようにしたメタルハライドランプ、或いはナトリウム蒸
気の熱陰極アークによるＤ線（589.0nm，589.9nm）の黄
橙色発光を行なわせるようにしたナトリウムランプ等の
金属蒸気放電灯が従来から体育館や工場の照明、ＯＨＰ
やカラー液晶プロジェクタ用の光源、自動車用フォグラ
ンプ等として使用されている。2. Description of the Related Art A mercury lamp utilizing the excitation and emission of mercury in the anode column of a hot cathode arc discharge, a metal halide is evaporated by the heat of a mercury hot cathode arc discharge to dissociate into a metal and a halogen, and a color peculiar to the metal. Conventionally, metal halide lamps that emit light that emits light, or metal vapor discharge lamps that emit yellow-orange light of the D line (589.0nm, 589.9nm) by a hot cathode arc of sodium vapor, such as a sodium vapor discharge lamp, have been conventionally used. Gymnasium and factory lighting, OHP
It is also used as a light source for color LCD projectors and fog lamps for automobiles.
【０００３】上記の金属蒸気放電灯の一般的な構造は、
特開昭６３−１６０１４８号公報等に開示されるように
外管内に金属若しくは金属化合物を封入した透光性バル
ブを配置し、この透光性バルブ内でアーク放電を生じさ
せるようにしている。そして、この透光性バルブの製造
方法としては特開平１−２３６５７５号公報に開示され
るように、段付きドリルで研削加工した両端の筒状開口
内に電極を備えたキャップを封着するようにしている。The general structure of the above metal vapor discharge lamp is
As disclosed in Japanese Unexamined Patent Publication No. 63-160148, a translucent bulb in which a metal or a metal compound is enclosed is arranged in an outer tube, and an arc discharge is generated in the translucent bulb. As a method of manufacturing this translucent bulb, as disclosed in Japanese Patent Application Laid-Open No. 1-236575, a cap provided with electrodes is sealed in cylindrical openings at both ends ground by a step drill. I have to.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の透光性
バルブは、キャップを装着する部分は強度を必要とする
ため、ある程度厚肉にされているが、それ以外の部分は
略均一な厚みにされている。このように筒状開口以外の
部分を略均一な厚みにすると、必要な方向と必要でない
方向にも光が均一な強さで出射することになる。また、
バルブ全体の厚みを強度を必要とする部分を基準にして
決めると、強度をそれほど必要としない部分が厚くな
り、その結果、熱容量が大きくなり始動時の立上がり性
が悪くなる。In the above-mentioned conventional translucent bulb, the portion to which the cap is attached needs to be strong, so that it is made thick to some extent, but the other portions have a substantially uniform thickness. Has been When the portion other than the cylindrical opening has a substantially uniform thickness in this manner, light is emitted with a uniform intensity in the necessary direction and the unnecessary direction. Also,
If the thickness of the entire valve is determined based on the portion requiring the strength, the portion not requiring the strength becomes thicker, and as a result, the heat capacity becomes large and the rising property at the time of starting becomes poor.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決すべく本
願の第１発明は、透光性バルブの主たる光の出射面とな
る部分を他の部分より薄肉に成形した。また本願の第２
発明は、透光性バルブを射出成形するものとし、その射
出成形に用いる成形型のキャビティ形状を透光性バルブ
を２分割し、主たる光の出射面となる部分が他の部分よ
り薄肉で、しかも一部がフランジ部となる形状とし、そ
れぞれの成形型のキャビティ内にセラミックコンパウン
ドを射出して成形体を得た後、これら成形体のフランジ
部を突き合せて加圧接合してバルブ形状とし、このバル
ブ形状となった成形体を焼成するようにした。In order to solve the above-mentioned problems, the first invention of the present application forms a part of the light-transmitting valve, which is a main light emitting surface, thinner than other parts. The second of the present application
According to the invention, a light-transmitting bulb is injection-molded, and the cavity shape of a mold used for the injection-molding is divided into two parts of the light-transmitting bulb, and a portion serving as a main light emission surface is thinner than other portions, Moreover, a part of it becomes a flange part, and after injecting a ceramic compound into the cavity of each mold to obtain a molded body, the flange parts of these molded bodies are butted and pressure-bonded to form a valve shape. The bulb-shaped molded body was fired.
【０００６】[0006]
【作用】透光性バルブの主たる光の出射面を射出成形と
同時に、または後加工によって薄肉にすることで、透光
性バルブの熱容量が減少し、また主たる光の出射面にお
ける光の減衰を抑えることができる。The heat capacity of the light-transmitting bulb is reduced by reducing the thickness of the light-transmitting bulb's main light-exiting surface simultaneously with injection molding or by post-processing. Can be suppressed.
【０００７】[0007]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。図１は本発明に係る透光性バルブの一部を破
断して示した全体図であり、この図では電極間距離が短
いショートアークタイプのメタルハライドランプを示し
ている。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view showing a part of a translucent bulb according to the present invention in a cutaway view, and this figure shows a short arc type metal halide lamp with a short interelectrode distance.
【０００８】このメタルハライドランプは多結晶アルミ
ナからなる透光性バルブ１内部に水銀２及び金属ハロゲ
ン化物３を封入し、更に透光性バルブ１の対向する位置
には筒状開口部４，４を一体的に形成し、この筒状開口
部４内に電極５を備えたコバール（Ｆe−Ｎi−Ｃo）、
Ｗ-ＴhＯ2またはＭoＳi2等からなるリード部材６を螺合
し、このリード部材６の外側面を貴金属層７を介してア
ルミナ系ガラス材８にて封着している。In this metal halide lamp, mercury 2 and a metal halide 3 are enclosed in a light-transmissive bulb 1 made of polycrystalline alumina, and cylindrical openings 4 and 4 are provided at the opposite positions of the light-transmissive bulb 1. A Kovar (Fe-Ni-Co) which is integrally formed and has an electrode 5 in the cylindrical opening 4;
A lead member 6 made of W-ThO2 or MoSi2 is screwed, and the outer surface of the lead member 6 is sealed with an alumina glass material 8 with a noble metal layer 7 interposed therebetween.
【０００９】ところで、上記透光性バルブ１の発光部１
０の形状は略球状をなし、この発光部１０のうち主たる
光の出射面となる部分１０ａは他の部分より薄肉に成形
されている。By the way, the light emitting portion 1 of the translucent bulb 1 is described.
The shape of 0 is substantially spherical, and a portion 10a of the light emitting portion 10 which is a main light emitting surface is formed thinner than the other portions.
【００１０】上記のように主たる光の出射面となる部分
１０ａを他の部分よりも薄肉にするには、図２（ａ）に
示すように略均一な厚みで成形された透光性バルブ１の
開口部４と発光部１０を研削治具にて加工する。尚、開
口部４についてはカップ砥石にて加工した後、雌ネジを
刻設する。As described above, in order to make the portion 10a, which is the main light emitting surface, thinner than other portions, the translucent bulb 1 molded with a substantially uniform thickness as shown in FIG. 2 (a). The opening 4 and the light emitting portion 10 are processed by a grinding jig. The opening 4 is machined with a cup grindstone and then a female screw is engraved.
【００１１】図３及び図４は異なるタイプのバルブの一
部を薄肉に加工する手順を示した図であり、図３に示す
透光性バルブ１は全体が短尺の筒状をなすショートアー
ク用のものであり、発光部１０のうち主たる光の出射面
となる部分１０ａは他の部分より薄肉に研削され、図４
に示す透光性バルブ１は全体が長尺の筒状をなすロング
アーク用のものであり、同様に発光部１０のうち主たる
光の出射面となる部分１０ａが他の部分より薄肉に研削
されている。FIGS. 3 and 4 are views showing a procedure for processing a part of bulbs of different types into a thin wall. The translucent bulb 1 shown in FIG. 3 is for a short arc in which the whole is in a short tubular shape. The portion 10a of the light emitting unit 10 which is the main light emitting surface is ground thinner than the other portions,
The light-transmitting bulb 1 shown in FIG. 1 is for a long arc, which has a long tubular shape as a whole, and similarly, a portion 10a of the light-emitting portion 10 which is a main light emitting surface is ground to be thinner than other portions. ing.
【００１２】ところで、上記の実施例にあっては通常の
方法によって作製された透光性バルブ１を後加工するこ
とで、薄肉部を形成するようにしたが、射出成形によっ
て透光性バルブの成形と薄肉部の成形とを同時に行なう
ようにしてもよい。By the way, in the above-mentioned embodiment, the thin portion is formed by post-processing the light-transmitting bulb 1 produced by the ordinary method. However, the light-transmitting bulb of the light-transmitting bulb is formed by injection molding. The molding and the thin portion may be simultaneously performed.
【００１３】射出成形する場合には、先ず図５（ａ）及
び（ｂ）に示すように２つの成形型１１，１２を用意す
る。それぞれの型１１，１２は可動型１１ａ，１２ａ、
固定型１１ｂ，１２ｂ及び成形ピン１１ｃ，１２ｃから
なり、型閉じ状態で可動型と成形ピンとの間には原料が
射出されるキャビティ１３，１４が画成される。In the case of injection molding, first, two molding dies 11 and 12 are prepared as shown in FIGS. 5 (a) and 5 (b). The respective molds 11 and 12 are movable molds 11a and 12a,
The fixed molds 11b and 12b and the molding pins 11c and 12c are formed, and cavities 13 and 14 for injecting the raw material are defined between the movable mold and the molding pins in the mold closed state.
【００１４】このキャビティ１３，１４の形状は透光性
バルブ１を２分割した形状で、特に主たる光の出射面と
なる部分が他の部分より薄肉となり、しかも一部がフラ
ンジ部となる形状となっている。そして、各キャビティ
１３，１４にはスプルー１１ｄ，１２ｄ、ランナー１１
ｅ，１２ｅ及びリングゲート１１ｆ，１２ｆを介してセ
ラミックコンパウンド１５を射出し、図６に示すように
透光性バルブの半体１６，１７を成形する。The cavities 13 and 14 are formed by dividing the light-transmitting bulb 1 into two parts. In particular, a portion serving as a main light emitting surface is thinner than the other portion, and a portion serving as a flange portion. Has become. The sprues 11d and 12d and the runner 11 are placed in the cavities 13 and 14, respectively.
The ceramic compound 15 is injected through e and 12e and the ring gates 11f and 12f to form the translucent bulb halves 16 and 17 as shown in FIG.
【００１５】ここでセラミックコンパウンドとしては、
多結晶アルミナ粉末を７８〜８６ｗｔ％（最適値は８２
ｗｔ％）、バインダーを１４〜２２ｗｔ％（最適値は１
８ｗｔ％）とし、バインダーとしてはアクリル系熱可塑
性樹脂、パラフィンワックス及びフタル酸ジ−ｎ−ブチ
ルを混合したものを使用し、混合割合としてはアクリル
系熱可塑性樹脂６〜２２ｗｔ％（好ましくは１４．５ｗ
ｔ％）、パラフィンワックスを１４ｗｔ％以下（好まし
くは３．０ｗｔ％）、フタル酸ジ−ｎ−ブチルを２ｗｔ
％以下（好ましくは０．５ｗｔ％）とする。また成形条
件としては、射出圧力を９００〜１８００kg/cm2、保圧
圧力を１８０〜８００kg/cm2、保圧時間を０．５〜５秒
とする。Here, as the ceramic compound,
78 to 86 wt% of polycrystalline alumina powder (the optimum value is 82
wt%), 14 to 22 wt% binder (optimum value is 1
8 wt%), a mixture of acrylic thermoplastic resin, paraffin wax and di-n-butyl phthalate is used as the binder, and the mixing ratio is 6 to 22 wt% of the acrylic thermoplastic resin (preferably 14. 5w
t%), paraffin wax 14 wt% or less (preferably 3.0 wt%), di-n-butyl phthalate 2 wt
% Or less (preferably 0.5 wt%). As molding conditions, the injection pressure is 900 to 1800 kg / cm 2 , the holding pressure is 180 to 800 kg / cm 2 , and the holding time is 0.5 to 5 seconds.
【００１６】上記の如くして得られた透光性バルブの半
体１６，１７のフランジ部１６ａ，１７ａを重ね、図７
に示すように８０〜１４０℃に加熱された上下の型１
８，１９間に半体１６，１７をセットし、フランジ部１
６ａ，１７ａを５〜１０ＭＰa程度の圧力で接合し、こ
の後型から半体１６，１７を接合してなるバルブを取り
出し、脱脂した後に焼成し、更にＨＩＰ処理して組織を
緻密にする。The flange portions 16a and 17a of the light-transmitting bulb halves 16 and 17 obtained as described above are overlapped with each other, and as shown in FIG.
Upper and lower molds 1 heated to 80-140 ° C as shown in
Set the halves 16 and 17 between 8 and 19 and the flange 1
6a and 17a are joined under a pressure of about 5 to 10 MPa, and a valve formed by joining the halves 16 and 17 is taken out from the die, degreased and fired, and further subjected to HIP treatment to make the structure dense.
【００１７】このようにして得られた透光性バルブ１内
に水銀及び金属ハロゲン化物等を封入するとともに両端
部に電極を備えたキャップを封着することで金属蒸気放
電灯が構成される。A metal vapor discharge lamp is constructed by enclosing mercury and metal halides in the translucent bulb 1 thus obtained and sealing caps having electrodes at both ends.
【００１８】図８及び図９は半体の分割部を異ならせた
別実施例を示すものであり、図８に示す例にあっては筒
状の透光性バルブを縦方向に２分割した形状の半体１
６，１７をフランジ部１６ａ，１７ａで接合し、図９に
示す例にあってはＵ字状をなす透光性バルブを縦方向に
２分割した形状の半体１６，１７をフランジ部１６ａ，
１７ａで接合するようにしている。更に必要であれば２
分割した部分を更に２分割するようにしてもよい。FIGS. 8 and 9 show another embodiment in which the divided parts of the half body are different, and in the example shown in FIG. 8, a cylindrical light-transmitting bulb is vertically divided into two parts. Shape half 1
6, 17 are joined by the flange portions 16a, 17a, and in the example shown in FIG. 9, the U-shaped translucent bulb is divided into two in the vertical direction.
They are joined at 17a. 2 if more needed
The divided portion may be further divided into two.
【００１９】[0019]
【発明の効果】以上に説明した如く本発明によれば、金
属蒸気放電灯の透光性バルブの主たる光の出射面を薄肉
にしたので、透光性バルブの熱容量を減少させて始動時
の立上がり性を向上させることができ、また主たる光の
出射面における光の減衰を抑えることができる。また従
来の製造方法にあっては、仮りに透光性バルブの一部を
薄肉とするとしても、後加工によらなければならず、ま
た後加工によって薄肉とする部分の厚みがもともと十分
あるわけではないので、加工が極めて面倒であったが、
射出成形によって透光性バルブを成形することで後加工
によって薄肉部を形成する手間が省け、更にバルブの寸
法精度を高めることができる。As described above, according to the present invention, since the main light emitting surface of the light-transmitting bulb of the metal vapor discharge lamp is made thin, the heat capacity of the light-transmitting bulb is reduced and the light-transmitting bulb is reduced during starting. The rising property can be improved, and the attenuation of light on the emission surface of the main light can be suppressed. Further, in the conventional manufacturing method, even if a part of the translucent bulb is made thin, it must be done by post-processing, and the thickness of the part made thin by post-processing is originally sufficient. It's not, so processing was extremely troublesome,
By molding the translucent bulb by injection molding, it is possible to save the labor of forming a thin portion by post-processing and further improve the dimensional accuracy of the bulb.
【図１】本発明に係る透光性バルブの一部を破断して示
した全体図FIG. 1 is an overall view showing a partially cutaway view of a translucent bulb according to the present invention.
【図２】図１に示したバルブの一部を薄肉に加工する手
順を示した図FIG. 2 is a diagram showing a procedure for processing a part of the valve shown in FIG. 1 into a thin wall.
【図３】異なるタイプのバルブの一部を薄肉に加工する
手順を示した図FIG. 3 is a diagram showing a procedure for processing a part of different types of valves into a thin wall.
【図４】異なるタイプのバルブの一部を薄肉に加工する
手順を示した図FIG. 4 is a diagram showing a procedure for processing a part of different types of valves into a thin wall.
【図５】射出成形によって透光性バルブを成形している
状態を示す図FIG. 5 is a diagram showing a state in which a translucent bulb is molded by injection molding.
【図６】射出成形によって得られた成形体を示す図FIG. 6 is a view showing a molded body obtained by injection molding.
【図７】射出成形によって得られた成形体を突き合せて
透光性バルブとする図FIG. 7 is a diagram in which a molded body obtained by injection molding is butted to form a translucent bulb.
【図８】成形体の別形状を示す図FIG. 8 is a view showing another shape of the molded body.
【図９】成形体の別形状を示す図FIG. 9 is a view showing another shape of the molded body.
１…透光性バルブ、１０…発光部、１０ａ…主たる光の
出射面となる部分、１１，１２…成形型、１３，１４…
キャビティ、１５…セラミックコンパウンド、１６，１
７…成形した透光性バルブの半体、１６ａ，１７ａ…フ
ランジ部。DESCRIPTION OF SYMBOLS 1 ... Translucent bulb, 10 ... Light emission part, 10a ... Portion which becomes an emission surface of main light, 11, 12 ... Mold, 13, 14 ...
Cavity, 15 ... Ceramic compound, 16, 1
7 ... Molded translucent bulb half, 16a, 17a ... Flange portion.
Claims (2)
た金属蒸気放電灯の透光性バルブにおいて、この透光性
バルブは主たる光の出射面となる部分が他の部分より薄
肉に成形されていることを特徴とする金属蒸気放電灯の
透光性バルブ。1. A light-transmitting bulb of a metal vapor discharge lamp in which a metal or a metal compound is sealed, wherein the light-transmitting bulb is formed such that a portion serving as a main light emitting surface is thinner than other portions. A translucent bulb for a metal vapor discharge lamp, which is characterized in that
ブを２分割するとともに主たる光の出射面となる部分が
他の部分より薄肉で、しかも一部がフランジ部となる形
状の成形型を用意し、それぞれの成形型のキャビティ内
にセラミックコンパウンドを射出し、次いでそれぞれの
型内から成形体を取出し、各成形体のフランジ部を突き
合せフランジ部同士を加圧接合してバルブ形状とし、こ
のバルブ形状となった成形体を焼成するようにしたこと
を特徴とする金属蒸気放電灯の透光性バルブの製造方
法。2. A molding die having a cavity shape in which a light-transmitting bulb is divided into two parts, a main light emitting surface is thinner than other portions, and a part is a flange portion. Prepare, inject the ceramic compound into the cavity of each mold, then take out the molded body from each mold, press the flange portions of each molded body to join the flange portions together to form a valve shape, A method for producing a translucent bulb for a metal vapor discharge lamp, characterized in that the bulb-shaped compact is fired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047392A JPH0620649A (en) | 1992-07-03 | 1992-07-03 | Translucent bulb of metal-vapor discharge lamp and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047392A JPH0620649A (en) | 1992-07-03 | 1992-07-03 | Translucent bulb of metal-vapor discharge lamp and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0620649A true JPH0620649A (en) | 1994-01-28 |
Family
ID=16424907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20047392A Pending JPH0620649A (en) | 1992-07-03 | 1992-07-03 | Translucent bulb of metal-vapor discharge lamp and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620649A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999062103A1 (en) * | 1998-05-27 | 1999-12-02 | Ngk Insulators, Ltd. | Light emitting container for high-pressure discharge lamp and manufacturing method thereof |
| US6363311B1 (en) | 1997-12-01 | 2002-03-26 | Hitachi, Ltd. | Running controller for automobile |
| WO2003032363A1 (en) * | 2001-10-02 | 2003-04-17 | Ngk Insulators, Ltd. | High-voltage discharge lamp, head lamp for automobile and arc tube for the high-voltage discharge lamp |
| EP1310983A2 (en) * | 2001-10-02 | 2003-05-14 | Ngk Insulators, Ltd. | Light emitting vessels for high pressure discharge lamps, high pressure discharge lamps, lighting systems and head lamp for automobiles |
| JP2004221091A (en) * | 1998-05-27 | 2004-08-05 | Ngk Insulators Ltd | Light emitting container and high pressure discharge lamp having same |
-
1992
- 1992-07-03 JP JP20047392A patent/JPH0620649A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6363311B1 (en) | 1997-12-01 | 2002-03-26 | Hitachi, Ltd. | Running controller for automobile |
| WO1999062103A1 (en) * | 1998-05-27 | 1999-12-02 | Ngk Insulators, Ltd. | Light emitting container for high-pressure discharge lamp and manufacturing method thereof |
| JP2004221091A (en) * | 1998-05-27 | 2004-08-05 | Ngk Insulators Ltd | Light emitting container and high pressure discharge lamp having same |
| US7041240B2 (en) | 1998-05-27 | 2006-05-09 | Ngk Insulators, Ltd. | Method of manufacturing a high pressure discharge lamp vessel |
| WO2003032363A1 (en) * | 2001-10-02 | 2003-04-17 | Ngk Insulators, Ltd. | High-voltage discharge lamp, head lamp for automobile and arc tube for the high-voltage discharge lamp |
| EP1310983A2 (en) * | 2001-10-02 | 2003-05-14 | Ngk Insulators, Ltd. | Light emitting vessels for high pressure discharge lamps, high pressure discharge lamps, lighting systems and head lamp for automobiles |
| US6791267B2 (en) | 2001-10-02 | 2004-09-14 | Ngk Insulators, Ltd. | High pressure discharge lamps, lighting systems, head lamps for automobiles and light emitting vessels for high pressure discharge lamps |
| EP1310983A3 (en) * | 2001-10-02 | 2005-11-23 | Ngk Insulators, Ltd. | Light emitting vessels for high pressure discharge lamps, high pressure discharge lamps, lighting systems and head lamp for automobiles |
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