EP0407987B1 - Méthode de manufacture de tube à décharge scellé par gaz - Google Patents

Méthode de manufacture de tube à décharge scellé par gaz Download PDF

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Publication number
EP0407987B1
EP0407987B1 EP19900113182 EP90113182A EP0407987B1 EP 0407987 B1 EP0407987 B1 EP 0407987B1 EP 19900113182 EP19900113182 EP 19900113182 EP 90113182 A EP90113182 A EP 90113182A EP 0407987 B1 EP0407987 B1 EP 0407987B1
Authority
EP
European Patent Office
Prior art keywords
gas introducing
introducing pipe
sealing material
heat melting
gas
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
Application number
EP19900113182
Other languages
German (de)
English (en)
Other versions
EP0407987A1 (fr
Inventor
Kiyoshi C/O Yazaki Parts Co. Ltd. Yagi
Seiichi C/O Yazaki Parts Co. Ltd. Wakabayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
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Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Publication of EP0407987A1 publication Critical patent/EP0407987A1/fr
Application granted granted Critical
Publication of EP0407987B1 publication Critical patent/EP0407987B1/fr
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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
    • 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
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs

Definitions

  • the present invention relates to a method of manufacturing a voltage controlling discharge tube, and more particularly to a method of manufacturing a gas sealed discharge tube for a series gap in an ignition device for an automotive engine, for example.
  • An ignition device for an automotive engine or the like is designed to apply a high voltage to a spark plug and thereby generate a spark.
  • a so-called series gap ignition device having a discharge gap formed in series with the spark plug. It is known to use a discharge tube for the formation of such a series gap which discharge tube is provided with a pair of discharge electrodes mounted on opposite ends of a cylindrical body and filled with an inert gas.
  • a discharge starting voltage in the discharge tube is required to be high to some extent as compared with that of the ignition plug. It is also known to increase a pressure of the inert gas to be filled, so as to increase the discharge starting voltage with the discharge tube maintained compact.
  • a method of manufacturing a gas sealed discharge tube including an electrical insulating cylindrical body and a pair of electrodes attached to opposite ends of said electrical insulating cylindrical body, said method comprising the steps of inserting a heat melting sealing material into a gas introducing pipe mounted to at least one of said electrodes so as to communicate the inside space of said cylindrical body to the outside thereof, said heat melting sealing material being a solid having an outer diameter smaller than an inner diameter of said gas introducing pipe; introducing a gas through said gas introducing pipe into said cylindrical body; heating said gas introducing pipe together with said heat melting sealing material under pressure at a sealing position where said gas introducing pipe is intended to be sealed to thereby press said gas introducing pipe and simultaneously melt said heat melting sealing material; and cutting said gas introducing pipe at said sealing position together with said heat melting sealing material after solidified.
  • the gas introducing pipe to be mounted to the discharge tube in the present invention is required to be pressed by heating under pressure. Furthermore, it is necessary to hermetically mount the gas introducing pipe to at least one of the electrodes by any bonding means such as welding or brazing. Moreover, the gas introducing pipe is preferably formed of an electrical conductive material such as metal, preferably, a copper material.
  • the heat melting sealing material to be inserted into the gas introducing pipe has a melting point lower than that of the gas introducing pipe, and preferably has an affinity to the material of the gas introducing pipe and a good wettability.
  • the sealing material is selected from silver solder, solder or high-molecular adhesive.
  • the sealing material is not limited to these materials.
  • the heat melting sealing material is required to be a solid having an outer diameter smaller than an inner diameter of the gas introducing pipe.
  • the sealing material is in the form of rod, wire or granule. Particularly, a wire form of the sealing material is preferable since an insert position of the sealing material in the gas introducing pipe can be easily controlled and adjusted.
  • a composition and pressure of a gas to be sealed can be greatly easily adjusted, and a manufacturing equipment and its operation are simple. Therefore, mass production of a gas sealed discharge tube having a high quality can be economically carried out.
  • reference numeral 1 designates an electrical insulating cylindrical body formed of glass or ceramics
  • reference numerals 2 and 3 designate discharge electrodes bonded to opposite ends of the cylindrical body 1.
  • the electrode 2 is formed with a through-hole 2′.
  • a gas introducing pipe 4 is engaged with the through-hole 2′, and is brazed to the electrode 2.
  • Such an assembly A can be formed under vacuum or in the atmosphere of air or inert gas, for example.
  • the assembly A is mounted to a device as shown in Fig. 1, so as to form a gas sealed discharge tube B as shown in Fig. 3.
  • This device is constructed of a jig 6 and a press including a pair of heating electrodes 7a and 7b.
  • the jig 6 is constructed of a piping system including a joint portion 6a adapted to be hermetically connected to a free end of the gas introducing pipe 4, a wire inserting portion 6b adapted to hermetically insert a silver solder wire 5, a connecting portion 6c connected to a vacuum device (not shown) for evacuating the inside of the assembly A, a gas introducing portion 6d for supplying an inert gas into the assembly A, and a manometer 6e.
  • the free end of the gas introducing pipe 4 of the assembly A is first connected to the joint portion 6a, and then the silver solder wire 5 is inserted through the wire inserting portion 6b into the gas introducing pipe 4 as far as a sealing position where the gas introducing pipe 4 is intended to be sealed. Then, the wire inserting portion 6b and the gas introducing portion 6d are closed, and the inside of the assembly A is evacuated through the connecting portion 6c by the vacuum device. Then, the connecting portion 6c is closed, and an inert gas is introduced from the gas introducing portion 6d until a predetermined pressure is reached.
  • the gas introducing pipe 4 is pressed by the heating electrodes 7a and 7b, and simultaneously the silver solder wire 5 is molten by the heating electrodes 7a and 7b. Then, the heating electrodes 7a and 7b are moved away from each other to solidify the silver solder of the wire 5, thus completing the sealing operation of the assembly A. Then, the assembly A containing the sealed gas is removed from the joint portion 6a, and the gas introducing pipe 4 is cut at a sealing portion 4′ as shown in Fig. 3. Thus, the gas sealed discharge tube B sealed by a solidified silver solder 5′ as shown in Fig. 3 is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (13)

  1. Méthode de fabrication d'un tube à décharge (B) dans un gaz, scellé, comprenant un corps cylindrique diélectrique (1) et une paire d'électrodes (2, 3) fixées aux extrémités opposées dudit corps cylindrique diélectrique (1), ladite méthode comprenant les étapes consistant à introduire un matériau thermofusible de scellement (5) dans un tube (4) d'introduction de gaz monté sur au moins une desdites électrodes (2, 3) de manière à faire communiquer l'espace intérieur dudit corps cylindrique (1) avec l'extérieur de celui-ci, ledit matériau thermofusible de scellement (5) étant un solide ayant un diamètre extérieur inférieur au diamètre intérieur dudit tube (4) d'introduction de gaz ; introduire un gaz par ledit tube d'introduction de gaz dans ledit corps cylindrique ; chauffer ledit tube (4) d'introduction de gaz en même temps que ledit matériau thermofusible de scellement (5) sous pression à un endroit de scellement où ledit tube (4) d'introduction de gaz est destiné à être scellé de manière à comprimer ainsi ledit tube d'introduction de gaz et à faire fondre simultanément ledit matériau thermofusible de scellement ; et à couper ledit tube (4) d'introduction de gaz au niveau dudit endroit de scellement en même temps que ledit matériau thermofusible de scellement (5) après solidification.
  2. Méthode selon la revendication 1 dans laquelle ledit tube (4) d'introduction de gaz est monté de façon hermétique sur au moins une desdites électrodes (2, 3).
  3. Méthode selon la revendication 2 dans laquelle ledit tube (4) d'introduction de gaz est soudé à au moins une desdites électrodes (2, 3).
  4. Méthode selon la revendication 2 dans laquelle ledit tube (4) d'introduction de gaz est brase a au moins une desdites électrodes (2, 3).
  5. Méthode selon la revendication 1 dans laquelle ledit tube (4) d'introduction de gaz est formé d'un matériau électroconducteur.
  6. Méthode selon la revendication 5 dans laquelle ledit matériau électroconducteur comprend du métal.
  7. Méthode selon la revendication 6 dans laquelle ledit métal comprend du cuivre.
  8. Méthode selon la revendication 1 dans laquelle ledit matériau thermofusible de scellement a un point de fusion inférieur à celui dudit tube (4) d'introduction de gaz.
  9. Méthode selon la revendication 8 dans laquelle ledit matériau thermofusible de scellement (5) a une affinité pour le matériau formant ledit tube (4) d'introduction de gaz et a une bonne mouillabilité.
  10. Méthode selon la revendication 9 dans laquelle ledit matériau thermofusible de scellement (5) est sélectionné parmi le groupe comprenant l'argent d'apport de brasage, un métal d'apport de brasage et un adhésif à haute densité moléculaire.
  11. Méthode selon la revendication 1 dans laquelle ledit matériau thermofusible de scellement (5) se présente sous la forme d'un fil.
  12. Méthode selon la revendication 1 comprenant en outre l'étape consistant à évacuer l'espace intérieur dudit corps cylindrique (1) avant ladite étape d'introduction de gaz.
  13. Méthode selon la revendication 1 dans laquelle ladite étape de chauffage est effectuée par un dispositif de pression (7) comprenant une paire d'électrodes chauffantes (7A, 7B).
EP19900113182 1989-07-14 1990-07-10 Méthode de manufacture de tube à décharge scellé par gaz Expired - Lifetime EP0407987B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP180488/89 1989-07-14
JP18048889A JPH0346783A (ja) 1989-07-14 1989-07-14 ガス入り放電管の製造法

Publications (2)

Publication Number Publication Date
EP0407987A1 EP0407987A1 (fr) 1991-01-16
EP0407987B1 true EP0407987B1 (fr) 1994-10-26

Family

ID=16084112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900113182 Expired - Lifetime EP0407987B1 (fr) 1989-07-14 1990-07-10 Méthode de manufacture de tube à décharge scellé par gaz

Country Status (4)

Country Link
EP (1) EP0407987B1 (fr)
JP (1) JPH0346783A (fr)
CA (1) CA2020579C (fr)
DE (1) DE69013595T2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010059683A (ko) * 1999-12-30 2001-07-06 이계안 탱크 타입 인터쿨러 구조
JP4807584B2 (ja) * 2007-04-06 2011-11-02 シグマ紙業株式会社 包装容器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD30936A (fr) *
SE375201B (fr) * 1974-02-27 1975-04-07 Ericsson Telefon Ab L M

Also Published As

Publication number Publication date
DE69013595T2 (de) 1995-03-02
EP0407987A1 (fr) 1991-01-16
DE69013595D1 (de) 1994-12-01
JPH0346783A (ja) 1991-02-28
CA2020579C (fr) 1993-07-20
CA2020579A1 (fr) 1991-01-15

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