JPH0322012B2 - - Google Patents
Info
- Publication number
- JPH0322012B2 JPH0322012B2 JP57015872A JP1587282A JPH0322012B2 JP H0322012 B2 JPH0322012 B2 JP H0322012B2 JP 57015872 A JP57015872 A JP 57015872A JP 1587282 A JP1587282 A JP 1587282A JP H0322012 B2 JPH0322012 B2 JP H0322012B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- sealing
- glass
- mold
- bulb
- 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 - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 42
- 239000011521 glass Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 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
- H01J9/40—Closing vessels
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】
〔発明の技術分野〕
本発明は環形けい光ランプにおけるステムの封
止工程と、この封止部に節部を成形する工程のを
連続して行う封止方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a sealing method in which a step of sealing a stem of an annular fluorescent lamp and a step of forming a knot in the sealing portion are performed successively.
通常環形けい光ランプを製造するには、内面に
けい光被膜を被着した直状のガラスバルブの両端
に、電極を備えたステムを封止し、この封止部に
型を用いて節部を形成し、しかるのちこの節部を
把持して上記ガラスバルブを加熱軟化せしめて彎
曲成形を行う。上記節部は環状に曲成する場合の
把持用引掛り部となるものである。
Normally, to manufacture an annular fluorescent lamp, a stem with electrodes is sealed at both ends of a straight glass bulb whose inner surface is coated with a fluorescent coating, and a mold is used to seal the stem into a joint. Then, the glass bulb is heated and softened by gripping the knots to form a curve. The above-mentioned joints serve as gripping hooks when bent into an annular shape.
ところで上記のごとき環形けい光ランプの製造
においては、封止部に節部を成形するに先立つ
て、ステムを直状ガラスバルブの端部に封止しな
ければならないが、従来におけるステム封止方法
は以下に示す２通りの方法が採用されていた。 By the way, in manufacturing the above-mentioned annular fluorescent lamp, the stem must be sealed to the end of the straight glass bulb before forming the knot in the sealing part, but the conventional stem sealing method The following two methods were used.
その１つは第１図Ａ，Ｂに示されるようなカー
レツト方式と称されるもので、ガラスバルブ１の
端部より軸方向に沿う中央部へ数10mm進入した位
置にステムガラス２を、マウントホルダ３によつ
て挿入させ、このステムガラス２のフレア部４に
対向するバルブ１外周を封止用バーナ５で加熱軟
化させるものであり、このものはバーナ５により
バルブ１を加熱軟化させるとガラス管の性質にも
とづき当該加熱部のバルブ径が縮小されてフレア
部４に溶融封着し、このときフレア部４よりも下
方にあるカーレツト部６は自重によつて封止部分
から落下切断されるものである。このカーレツト
方式は封止工程が簡単であるが、カーレツト部６
にもとづくガラス材料の損失が大きい不具合があ
る。 One of these is the so-called curlet method, as shown in Figures 1A and B, in which the stem glass 2 is mounted several tens of millimeters from the end of the glass bulb 1 toward the center along the axial direction. The outer periphery of the bulb 1 facing the flare portion 4 of the stem glass 2 is heated and softened by a sealing burner 5. When the bulb 1 is heated and softened by the burner 5, the glass is heated and softened. Based on the properties of the pipe, the diameter of the bulb in the heating section is reduced and melted and sealed to the flared section 4, and at this time the curlet section 6 below the flared section 4 falls and is cut off from the sealed section due to its own weight. It is something. This curlet method has a simple sealing process, but the curlet part 6
There is a problem in which the loss of the glass material based on the glass material is large.
また他の方法として第２図Ａ，Ｂに示されるバ
ツトシール方式と称されるものが知られている。
このものは予めガラスバルブ１の端部をエンドフ
オーミングして縮径させておき、このエンドフオ
ーミング部２０に、ステムガラス２のフレア部４
をマウントホルダ３によつて外方から当接させ、
この当接部分をバーナ２１によつて加熱軟化する
ことにより封止する方法であり、この方法は材料
損失を生じないが、予めエンドフオーミングして
おく必要から作業工程の増大を招く不具合があ
る。 Another known method is the so-called butt seal method shown in FIGS. 2A and 2B.
In this case, the end of the glass bulb 1 is end-formed in advance to reduce its diameter, and the flared part 4 of the stem glass 2 is attached to the end-formed part 20.
is abutted from the outside by the mount holder 3,
This method seals the abutting portion by heating and softening it with a burner 21. Although this method does not cause material loss, it has the disadvantage of increasing the number of work steps because it requires end forming in advance. .
したがつて上記いづれの方法であつても材料ロ
スもしくは加工工程ロスを生じる欠点があつた。 Therefore, all of the above-mentioned methods have the drawback of causing material loss or processing loss.
一方、環形けい光ランプの場合にはすでに述べ
た通り、封止工程後に、この封止端部に節部を形
成する。この節部を成形する方法としてすでに本
出願人は「特公昭53−27592号公報」に開示され
た方法を提案し、この方法を採用している。この
公報記載の方法は封止部を型に被冠し、この型と
バルブとを相対的に移動させて封止部をバルブ軸
方向に１mm〜10mm圧縮させて該封止部の肉厚を増
大させておき、しかるのちバルブ内部の圧力をバ
ルブ外部より増大させて封止部を型内に内拡させ
て節部を形成するものである。このような方法に
おいては、封止部の肉厚を増大させるために型に
より封止部を押圧しているが、型をバルブ軸方向
へ移動させる機構は複雑になる不具合がある。 On the other hand, in the case of an annular fluorescent lamp, as already mentioned, a knot is formed at the end of the seal after the sealing process. As a method for forming this knot, the present applicant has already proposed a method disclosed in Japanese Patent Publication No. 53-27592, and this method has been adopted. In the method described in this publication, the sealing part is covered with a mold, and the mold and the valve are moved relative to each other to compress the sealing part by 1 mm to 10 mm in the axial direction of the valve, thereby reducing the wall thickness of the sealing part. Then, the pressure inside the valve is increased from the outside of the valve to expand the sealing part inward into the mold to form a knot. In such a method, the sealing part is pressed by a mold in order to increase the thickness of the sealing part, but there is a problem in that the mechanism for moving the mold in the valve axis direction becomes complicated.
本発明はこのような事情にもとづきなされたも
ので、その目的とするところは、従来のごときカ
ーレツト方式にもとづく材料損失やバツトシール
方式による封止工程の増加を解消した封止工程を
採用し、この封止工程時に該封止部に肉溜り（厚
肉部）を設け、型による節部成形工程が簡単に行
えて型の駆動構造も簡素化する環形けい光ランプ
の封止方法を提供しようとするものである。
The present invention was developed based on the above circumstances, and its purpose is to adopt a sealing process that eliminates the material loss caused by the conventional curlet method and the increase in sealing steps caused by the butt seal method. An object of the present invention is to provide a sealing method for an annular fluorescent lamp in which a thick wall (thick wall part) is provided in the sealing part during the sealing process, thereby making it possible to easily perform the joint forming process using a mold and simplifying the drive structure of the mold. It is something to do.
すなわち本発明は、予め所定長に切断されてい
る直状ガラスバルブの開口端よりも若干中央寄り
に位置するようにステムガラスのフレア部を挿入
し、このフレア部よりもさらに中央寄りに位置す
るガラスバルブをバーナにより加熱軟化せしめて
縮径し、該バーナをバルブの開口端側に移動させ
てフレア部に対向するバルブを縮径せしめてフレ
ア部を溶着封止するようにし、ガラスバルブが予
め所定長に切断されていることからバルブの材料
損失が生じないとともに、バルブが加熱されて軟
化した場合に縮径する性質を利用するから予め端
部加工の必要がなくて封止が簡単に行えることに
なり、かつ上記封止中においてバルブの開口縁を
溶融することによつてバルブの開口縁のガラス材
料を封止部に集めて封止部に肉溜りを形成し、し
かるのち型を被冠させて封止部を膨出成形させる
ようにし、型によつて格別に肉溜りを作る必要が
ないので型の移動機構が簡単になるようにしたこ
とを特徴とする。
That is, in the present invention, the flared portion of the stem glass is inserted so as to be located slightly toward the center of the open end of a straight glass bulb that has been cut to a predetermined length, and the flared portion of the stem glass is positioned further toward the center than this flared portion. The glass bulb is heated and softened with a burner to reduce its diameter, and the burner is moved to the open end side of the bulb to reduce the diameter of the bulb facing the flared portion so that the flared portion is welded and sealed. Since the valve is cut to a predetermined length, there is no loss of material in the valve, and since the valve has the property of contracting in diameter when heated and softened, there is no need to process the end in advance, making it easy to seal. By melting the opening edge of the bulb during the above-mentioned sealing, the glass material on the opening edge of the bulb is collected in the sealing part to form a lump in the sealing part, and then the mold is covered. The present invention is characterized in that the sealing part is bulged and molded by the crown, and there is no need to create a special pocket with the mold, so that the mechanism for moving the mold is simplified.
以下本発明の一実施例を第３図以下の図面にも
とづき説明する。
An embodiment of the present invention will be described below based on the drawings from FIG. 3 onwards.
第３図以下は封止および節部成形の順にもとづ
き示す断面図であるが、各図において左半分は当
該工程の成形前の状態、右半分は当該工程の成形
後の状態をそれぞれ示す。 FIG. 3 and subsequent figures are cross-sectional views shown based on the order of sealing and knot molding, and in each figure, the left half shows the state before molding in the relevant step, and the right half shows the state after molding in the relevant step.
図中３０は直状ガラスバルブであり、予めラン
プ長よりも若干長い寸法に切断され、内面に図示
しないがけい光体被膜を塗着してある。なお上記
若干長い寸法とは、第３図のl1にほぼ相当する。 In the figure, reference numeral 30 denotes a straight glass bulb, which is cut in advance into a size slightly longer than the length of the lamp, and whose inner surface is coated with a phosphor coating (not shown). Note that the slightly longer dimension described above approximately corresponds to l 1 in FIG.
３１はステムガラスであり、電極３２をリード
線３３，３３によつて支持している。ステムガラ
ス３１のフレア部３４は、ガラスバルブ３０の内
径より小径をなしている。なお３５は第６図、第
７図に示される排気管である。 31 is a stem glass, and the electrode 32 is supported by lead wires 33, 33. The flare portion 34 of the stem glass 31 has a smaller diameter than the inner diameter of the glass bulb 30. Note that 35 is an exhaust pipe shown in FIGS. 6 and 7.
このようなステムガラス３１はマウントホルダ
３６に支持されて上記ガラスバルブ３０の端部に
挿入される。この場合第３図に示される通り、フ
レア部３４はバルブ３０の開口縁３０ａよりもバ
ルブ中央側に向つて寸法l1だけ内側に位置され
る。この寸法l1は後述する肉溜り部の肉厚を決定
するのに大切な寸法であり、バルブ径およびフレ
ア径等によつて多小の差はあるが、４±２mm程度
が好ましい。 The stem glass 31 is supported by a mount holder 36 and inserted into the end of the glass bulb 30. In this case, as shown in FIG. 3, the flare portion 34 is located inward by a dimension l 1 toward the center of the valve from the opening edge 30a of the valve 30. This dimension l 1 is an important dimension for determining the wall thickness of the wall portion described later, and although it varies depending on the valve diameter, flare diameter, etc., it is preferably about 4±2 mm.
第４図に示すバーナ４０は、ラングバーナであ
り、バルブ３０の外方を包囲するような環状をな
しており、内周面には周方向に等間隔を存して炎
孔４１…を有している。バーナ４０は図示しない
適宜な駆動手段によりバルブ３０の軸方向に沿つ
て移動可能となつており、第３図のごときセツテ
イングが終了すると第４図のごとき位置に移動さ
れる。第４図におけるバーナ位置とは、炎孔４１
…が、バルブ３０の開口縁３０ａよりも中央側に
寸法L1だけ寄つた位置であり、この寸法L1は前
記l1よりも大きくて、炎孔４１…がフレア部３４
よりもさらにバルブ中央寄りに位置される場所で
ある。第４図の位置におけるバーナ４０は当初バ
ルブ壁を弱火で予熱し、しかるのち強火により管
壁を加熱軟化して右半分に示されるごとく当該管
壁が若干縮径されるまで加熱する。なおガラス管
は管壁を加熱軟化すると縮径（絞り）変形される
性質がある。 The burner 40 shown in FIG. 4 is a rung burner, and has an annular shape that surrounds the outside of the bulb 30, and has flame holes 41 on the inner peripheral surface at equal intervals in the circumferential direction. ing. The burner 40 is movable along the axial direction of the valve 30 by an appropriate driving means (not shown), and when the setting as shown in FIG. 3 is completed, it is moved to the position shown in FIG. 4. The burner position in Fig. 4 is the flame hole 41.
... is a position that is closer to the center than the opening edge 30a of the valve 30 by a dimension L1 , and this dimension L1 is larger than the above-mentioned l1 , and the flame hole 41...
This is a location located even closer to the center of the valve. The burner 40 in the position shown in FIG. 4 initially preheats the valve wall with low heat, and then heats the tube wall with high heat to soften it until it is slightly reduced in diameter, as shown in the right half. Note that a glass tube has the property of being deformed by reducing its diameter (squeezing) when the tube wall is heated and softened.
このようにしてフレア部３４よりもバルブ中央
寄りの管壁を縮径すると、バーナ４０を管端方向
へ移動させて炎孔４１…がフレア部３４と対向す
る場所に位置させる。この状態が第５図に示され
ており、炎孔４１はバルブ３０の開口縁３０ａか
ら寸法L2だけ中央寄りに位置され、寸法L2は、
とりもなおさず前記l1と等しい。第５図の状態で
バルブ３０を加熱軟化させると、フレア部３４と
対向する管壁が縮径されて右半分に示したように
フレア部３４と溶着される。この場合、管壁の縮
径状態は、第４図に示された縮径開始部分から溶
着封止部５０に亘り連続して緩やかに縮径され、
局部的に急激な縮径はない。 When the tube wall closer to the center of the valve than the flare section 34 is reduced in diameter in this manner, the burner 40 is moved toward the tube end and the flame holes 41 are located at a location facing the flare section 34. This state is shown in FIG. 5, where the flame hole 41 is located toward the center by a dimension L 2 from the opening edge 30a of the bulb 30, and the dimension L 2 is
It is exactly the same as l 1 above. When the bulb 30 is heated and softened in the state shown in FIG. 5, the tube wall facing the flared portion 34 is reduced in diameter and welded to the flared portion 34 as shown in the right half. In this case, the diameter of the pipe wall is reduced continuously from the diameter reduction start portion shown in FIG. 4 to the welded sealing portion 50,
There is no local rapid diameter reduction.
しかしてこのような手順により封止工程が終了
されるものであるが封止部５０には第６図の左半
分に示されたように端部側に開口縁３０ａが未だ
残つた形となつている。したがつてバーナ４０を
第５図の状態から必要に応じてさらにバルブ端部
方向に移動させるかもしくは第５図の位置に停止
したままで開口縁３０ａを加熱する。するとこの
開口縁３０ａは溶融されて封止部５０内に侵入さ
れてしまう。つまり、残留していた開口縁３０ａ
分のガラス材料は封止部５０に吸収され、この結
果封止部５０は右半分で示すように肉溜りを生じ
て厚肉部５１となる。 Although the sealing process is completed through these steps, the sealing portion 50 is left with an opening edge 30a on the end side, as shown in the left half of FIG. ing. Therefore, if necessary, the burner 40 is moved further toward the end of the valve from the state shown in FIG. 5, or the opening edge 30a is heated while the burner 40 remains stopped at the position shown in FIG. Then, this opening edge 30a is melted and penetrates into the sealing part 50. In other words, the remaining opening edge 30a
The amount of glass material is absorbed into the sealing part 50, and as a result, the sealing part 50 forms a thickened part 51 as shown in the right half.
第６図の右半分のごとき厚肉部５１が得られる
とバーナ４０の炎を弱火にしてこのバーナ４０は
第７図のように図示下方へ移動させておく。次に
上記厚肉部５１が未だ軟化状態にあるうちに、型
７０をセツトする。型７０は図示の左右に分割さ
れる分割タイプであり、矢印Ａ，Ｂ方向に移動さ
せることにより互に衝合され、封止部５０を覆
う。なおこのとき、マウントホルダ３６は図示下
方へ逃がす。 When the thick portion 51 as shown in the right half of FIG. 6 is obtained, the flame of the burner 40 is set to low and the burner 40 is moved downward in the figure as shown in FIG. Next, the mold 70 is set while the thick portion 51 is still in a softened state. The mold 70 is of a split type that is divided into left and right parts as shown in the figure, and is brought into contact with each other by moving in the directions of arrows A and B to cover the sealing part 50. At this time, the mount holder 36 is released downward in the figure.
型７０で封止部５０を覆つたのち、たとえばバ
ルブ３０内に加圧空気を送り込んでバルブ内の圧
力を外圧に対して相対的に増大させる。すると、
未だ軟化状態にある封止部５０は型７０の内面に
内拡される。この結果、第７図の右半分に示され
るように型６０の内面形状に合致した節部８０が
成形される。上記内拡に際しては厚肉部５１のガ
ラス材料が引張られるから、節部８０における肉
厚はほぼ均等になる。 After covering the sealing portion 50 with the mold 70, pressurized air is fed into the valve 30, for example, to increase the pressure inside the valve relative to the external pressure. Then,
The sealing portion 50, which is still in a softened state, is expanded into the inner surface of the mold 70. As a result, a knot 80 matching the inner surface shape of the mold 60 is formed as shown in the right half of FIG. 7. Since the glass material of the thick portion 51 is stretched during the inward expansion, the thickness of the joint portion 80 becomes approximately equal.
このような方法によると、直状ガラスバルブ３
０は予め所定長（製品長さ＋2l1にほぼ等しい）
に切断されているので、従来のカーレツト方式
（第１図）のもののようにガラス材料の無駄使い
がなく、材料費が安価になる。また、バルブ３０
は外周方からバーナ４０により加熱軟化されて縮
径される性質を利用してフレア部３４と封着され
るものであるため、従来のバツトシール方式（第
２図）のように予めエンドフオーミングしておく
必要がなく、よつて工程が削減される。 According to such a method, the straight glass bulb 3
0 is a predetermined length (approximately equal to product length + 2l 1 )
Since the glass is cut in half, there is no waste of glass material unlike in the conventional curlet method (Fig. 1), and the material cost is reduced. Also, valve 30
Since it is sealed to the flare part 34 by utilizing the property of being heated and softened from the outer periphery by the burner 40 and contracted in diameter, it is necessary to end form it in advance as in the conventional butt seal method (Fig. 2). There is no need to keep it in place, thus reducing the number of steps.
そしてガラスバルブ３０とフレア部３４との封
止時もしくは引続いて、開口縁３０ａの溶融を行
つて封止部５０に厚肉部５１を成形するので、前
述の特許公報に記載されているような型による肉
厚部の製造が不要になる。このため型７０は第７
図で示すように、矢印Ａ，Ｂ方向もしくは逆方向
への往復動だけですみ、型７０の駆動が容易にな
り移動機構が、たとえばシリンダー等の簡単な手
段で往復動させるように構成することができる。 Then, at the time of sealing the glass bulb 30 and the flare part 34 or subsequently, the opening edge 30a is melted to form the thick part 51 in the sealing part 50, as described in the above-mentioned patent publication. There is no need to manufacture thick parts using molds. Therefore, the mold 70 is the seventh
As shown in the figure, it is only necessary to reciprocate in the directions of arrows A and B or in the opposite direction, and the mold 70 can be easily driven, and the moving mechanism is constructed so that it can be reciprocated by a simple means such as a cylinder. Can be done.
上記封止部５０の厚肉部５１は、第３図に示さ
れたl1の部分に相当するガラス材料によつて形成
されるものであり、よつてこのl1の寸法を制御す
れば厚肉部５１の肉厚を規制することができる。
なお、厚肉部５１を作る場合、バーナ４０は第５
図の位置に停止したままで厚肉部５１が成形され
る場合もあるが、開口縁３０ａが大きく突出され
る場合、つまりl1が大きい場合にはバーナ４０を
第６図のような位置に移動させるようにしてもよ
く、また第５図の位置と第６図の位置との間でバ
ーナ４０を往復動させてもよい。 The thick portion 51 of the sealing portion 50 is formed of a glass material corresponding to the portion l 1 shown in FIG. The thickness of the flesh portion 51 can be regulated.
In addition, when making the thick part 51, the burner 40 is
In some cases, the thick part 51 is molded while it remains in the position shown in the figure, but if the opening edge 30a is to protrude significantly, that is, if l1 is large, the burner 40 should be moved to the position shown in Figure 6. Alternatively, the burner 40 may be moved back and forth between the position shown in FIG. 5 and the position shown in FIG.
以上詳述したように本発明方法によれば、従来
のカーレツト方式のようなガラスチユーブの無駄
がなく、材料損失が防止されるとともに、バツト
シール方式等のごとく予めエンドフオーミングす
る必要もないのでエンドフオーミング工程を省略
することができる。加えてガラスバルブにステム
ガラスのフレア部を封止すると同時もしくは引続
いてバルブの開口縁により封止部に厚肉部を成形
することができる。このため型により厚肉部を成
形する必要がなく、型の移動は分割型を開閉させ
るだけですむので型の移動機構が簡単になる。し
かも厚肉部は開口縁のフレア部からの突出量l1に
よつて調整できるので厚肉部の制御が容易であ
る。
As detailed above, according to the method of the present invention, unlike the conventional curlet method, there is no wastage of the glass tube and material loss is prevented, and there is no need to perform end forming in advance as in the butt seal method. The forming step can be omitted. Additionally, at the same time or subsequently to sealing the flared portion of the stem glass in the glass bulb, a thickened portion can be formed in the sealed portion by the opening edge of the bulb. Therefore, there is no need to use a mold to mold the thick portion, and the mold can be moved simply by opening and closing the split mold, which simplifies the mold movement mechanism. Moreover, since the thick portion can be adjusted by the amount of protrusion l 1 of the opening edge from the flared portion, the thick portion can be easily controlled.
第１図Ａ，Ｂおよび第２図Ａ，Ｂは従来方法を
説明するもので、第１図AHBはカーレツト方法
の説明図、第２図Ａ，Ｂはバツトシール方法の説
明図である。第３図ないし第７図は本発明の一実
施例を示し、工程順に示した説明図である。
３０……ガラスバルブ、３１……ステムガラ
ス、３２……電極、３４……フレア部、４０……
バーナ、５０……封止部、５１……厚肉部、７０
……型、８０……節部。
1A, B and 2A, B illustrate the conventional method, FIG. 1 AHB is an explanatory diagram of the curlet method, and FIGS. 2A, B are explanatory diagrams of the butt seal method. FIGS. 3 to 7 are explanatory diagrams showing one embodiment of the present invention and showing the steps in order. 30... Glass bulb, 31... Stem glass, 32... Electrode, 34... Flare part, 40...
Burner, 50...Sealing part, 51...Thick wall part, 70
...Type, 80...knot.
Claims (1)
ルブの端部にステムガラスを挿入してこのステム
ガラスのフレア部を上記ガラスバルブの開口端よ
り若干中央寄りに位置させ、上記バルブの上記フ
レア部よりもさらに中央寄りの位置をバーナで加
熱してバルブを縮径させ、かつこのバーナを順次
開口端側に向つて移動させることによりバルブと
フレア部を溶融封止しかつ開口端を溶融すること
により上記封止部に肉溜りを形成し、しかるのち
上記封止部に型を被冠してバルブ内圧力をバルブ
外圧力に対し相対的に増大させることによりこの
封止部を上記型内に内拡させて節部を成形するよ
うにしたことを特徴とする環形けい光ランプの封
止方法。1. Insert a stem glass into the end of a straight glass bulb that has been cut to a predetermined length in advance, position the flared portion of this stem glass slightly toward the center of the open end of the glass bulb, and remove the flare of the bulb. By heating a position closer to the center with a burner to reduce the diameter of the valve, and then moving this burner sequentially toward the open end, the valve and the flare part are melted and sealed, and the open end is melted. By doing this, a fat pocket is formed in the sealing part, and then the sealing part is covered with a mold to increase the pressure inside the valve relative to the pressure outside the valve, so that the sealing part is molded into the mold. 1. A method for sealing a ring-shaped fluorescent lamp, characterized in that the knot is formed by expanding inwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1587282A JPS58133740A (en) | 1982-02-03 | 1982-02-03 | Sealing process for ring fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1587282A JPS58133740A (en) | 1982-02-03 | 1982-02-03 | Sealing process for ring fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58133740A JPS58133740A (en) | 1983-08-09 |
| JPH0322012B2 true JPH0322012B2 (en) | 1991-03-26 |
Family
ID=11900885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1587282A Granted JPS58133740A (en) | 1982-02-03 | 1982-02-03 | Sealing process for ring fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58133740A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01235127A (en) * | 1988-03-14 | 1989-09-20 | Mitsubishi Electric Corp | Sealing of tubular bulb |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861542A (en) * | 1981-10-07 | 1983-04-12 | Nec Home Electronics Ltd | Sealing of tubular bulb |
-
1982
- 1982-02-03 JP JP1587282A patent/JPS58133740A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861542A (en) * | 1981-10-07 | 1983-04-12 | Nec Home Electronics Ltd | Sealing of tubular bulb |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58133740A (en) | 1983-08-09 |
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