EP0369370B1 - Méthode de fabrication d'une enceinte de lampe - Google Patents

Méthode de fabrication d'une enceinte de lampe Download PDF

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Publication number
EP0369370B1
EP0369370B1 EP89120989A EP89120989A EP0369370B1 EP 0369370 B1 EP0369370 B1 EP 0369370B1 EP 89120989 A EP89120989 A EP 89120989A EP 89120989 A EP89120989 A EP 89120989A EP 0369370 B1 EP0369370 B1 EP 0369370B1
Authority
EP
European Patent Office
Prior art keywords
lamp vessel
pinch
future
heated
blank
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
EP89120989A
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German (de)
English (en)
Other versions
EP0369370A2 (fr
EP0369370A3 (fr
Inventor
Clemens Barthelmes
Axel Bunk
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Publication of EP0369370A2 publication Critical patent/EP0369370A2/fr
Publication of EP0369370A3 publication Critical patent/EP0369370A3/fr
Application granted granted Critical
Publication of EP0369370B1 publication Critical patent/EP0369370B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • 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
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps

Definitions

  • the invention relates to a method for producing a lamp vessel with the features designated in the preamble of the main claim.
  • Such lamps are known from U.S. Patents 4,278,050, 4,658,177, 4,717,852 and 4,851,735.
  • a lamp vessel has been manufactured by pressing a pump tube onto the tapered end of a quartz glass or hard glass tube, squeezing the electrode system under argon purging on a crimping machine at the opposite end, and the resulting blank on the rinsing pumping station through the pump tube with the filling substances ( mercury and iodide body) and the pump tube on the pump is briefly removed.
  • the pump tube attachment point of the lamp vessel now has some serious disadvantages. In the burning position, the pump tube is heated up strongly by the discharge arc.
  • a pump-less manufacturing method for a lamp pinched on one side in which a tube is preformed into a bulb-forming component, the final shape of the future lamp vessel possibly being created by means of blow molding, followed by a light-generating arrangement (Filament) is introduced into the component forming the bulb, finally the assembly is pumped through the open end and subjected to a treatment and the internal atmosphere is regulated. Finally, the open end is sealed with a pinch.
  • the process for producing a lamp vessel is characterized according to the invention by the process steps listed in the main claim.
  • the further details for the manufacture of the lamp vessel result from the subclaims.
  • the optical distortions on the lamp vessel are avoided, which makes the lamp particularly suitable for use in high-quality reflector lamps.
  • lens-like lamp heads can be produced by using differently shaped form rollers in combination with the blow molding in order to achieve special optical effects.
  • the procedure described Particularly well suited for mechanized production so that, in addition to the qualitative advantages, a larger quantity and moreover can also be produced more cheaply.
  • the time-saving preforming of the pinch or constriction accelerates the manufacturing process and lowers the scrap.
  • the manufacturing process is equally suitable for the production of discharge tubes without pumps, their possibly required envelope bulbs as well as for incandescent bulb bulbs.
  • the manufacturing process is particularly suitable for lamps with a single glass bulb (in particular made of quartz glass).
  • it is also particularly suitable for lamps which require solid and / or liquid filling components.
  • the manufacturing process is particularly suitable if the purity of the filling components and / or the lamp components is particularly important. This is particularly true for low power metal halide discharge lamps.
  • a single piece of pipe 5 is inserted into a rotating (D) receptacle 6, which can optionally be connected to a vacuum VC or to an inert gas pressure p.
  • the closed end of the pipe section 5 is then heated by means of a flame 2 (Fig. 2a).
  • a vacuum VC can now be applied to the receptacle 6.
  • the flame 2 is turned off and two opposing mold jaws 7 enclose the heated end of the pipe section 5 while stopping the receptacle, the nitrogen overpressure p being simultaneously applied to the pipe section 5 at 2 bar (FIG. 2b) .
  • This process of blow molding creates the so-called blank 8 with a crest 9, a constriction 9a and a long collar 8a.
  • the area of the future lamp vessel 10 assumes an ellipsoidal shape corresponding to the mold jaws 7, as can best be seen in FIG. 2c, in which the blank 8 is shown in a top view.
  • a second possibility of producing the blank 8 ' is to heat a larger area at the closed end of the pipe section 5 with flames 2 (Fig. 2d).
  • the two opposing mold jaws 7 ' have, compared to the first possibility, an elongated base part which, when enclosing the pipe section and when blowing the mold, creates a cross-pressed area 9b with an oval cross-section (see FIG. 2f), which preforms the area of the pinch and one short collar 8'a at the open end of the blank 8 'leaves.
  • the initially rotationally symmetrical region of the future lamp vessel 10a or the constriction 99 (cf. FIG.
  • the blank 8 can also be produced by first providing a quartz glass tube which is open on both sides with the aid of the shaping roller 4 and subsequent use of the blow molding with the shaping jaws 7, and finally with the future lamp vessel 10.
  • FIGS. 3a to 3d are used to consider the further workflow.
  • the blank 8 is fitted in a vertical position with the tip 9 facing downwards with an interchangeable holder 11, which in turn contains two electrode systems, each consisting of a power supply 12, a sealing film 13 and an electrode 14.
  • the bill of exchange 11 is provided on its lateral surface with resilient elements 11a known to the person skilled in the art (preferably three elements; only one is visible in FIG. 3). These are quasi supported on the inner wall of the blank 8 and thereby hold the interchangeable receptacle by themselves.
  • the defined position of the electrodes 14 within the future lamp vessel 10 is achieved by inserting the interchangeable receptacle 11 into the blank 8 by means of a stamp 11b the interchangeable holder is connected via an arm 11c until the stop is lowered (shown schematically).
  • This process is also well known to the person skilled in the construction of fixtures and is therefore not shown separately (FIG. 3a).
  • the correct spacing of the electrodes from one another can additionally be supported by a spacer 14a made of quartz glass or a similar material. This spacer (only shown in Fig. 3a) extends between the two electrode systems outside the interchangeable holder. During the squeezing process, this is also heated and squeezed and thus remains in the squeeze.
  • a flushing cannula 17 which extends into the lamp vessel 10 is guided through an axial bore 15 in the exchangeable receptacle 11 in a processing station 16 of the squeezing machine. It is used to heat the lamp vessel 10 to about 1000 ° C. while the lamp vessel 10 is heating up at the same time an inert gas flow of about 50 to about 300 l / h (depending on the vessel volume) is conducted for about 6 seconds, thereby removing impurities within the lamp vessel 10 (FIG. 3b) In preparation for the subsequent operation, the lamp vessel 10 is now cooled to approximately 60 ° C. by means of blown air.
  • the blank 8 equipped with the interchangeable holder 11 and the electrode system and then annealed for cleaning is then lowered in the processing station 16 onto the ring aperture 18, the flushing cannula 17 is removed, the flames 2 swivel away to the side and a filling funnel 19 is inserted through the bore 15 of the interchangeable holder 11 .
  • the required filling substances 20 are introduced through this. In the case of a metal halide high-pressure discharge lamp, this is a drop of mercury and an iodide pill (FIG. 3c).
  • the filling funnel 19 is extended and the irrigation cannula 17 is retracted. Flames 2 heat the blank 8 in the area of the sealing films 13 to approximately 2200 ° C.
  • the future argon atmosphere in the lamp vessel 10 is maintained by the flushing cannula 17 and the dome 9 is cooled from below with liquid nitrogen (LN2), the ring diaphragm 18, which surrounds the lamp vessel 10 from below, the area of the dome 9 to be cooled from that separates the area to be heated in the vicinity of the sealing films 13 (Fig. 3d).
  • LN2 liquid nitrogen
  • the irrigation cannula 17 is extended and the blank 8 is sealed in the area of the sealing foils 13 by a pinch 21.
  • the protruding collar 8a (or 8'a) on the blank 8 (or 8 ') proves to be particularly advantageous because it protects the filling components and the foils during heating against contamination by the flames.
  • To the Crushing is used in known crimping jaws (two or four) (cf. the parallel application with the registration number (our file number VPA 88 P 5523 E)).
  • the filling substances 20 are partially evaporated by the lack of argon purging and by the glowing electrodes 14, and the pressure prevailing in the lamp vessel 10 increases.
  • the crimping jaws are provided with mold jaw attachments corresponding to the final shape of the lamp vessel 10 (not shown).
  • the protruding collar is cut off.
  • this collar can advantageously be used during further assembly and therefore remains on the vessel.
  • Such a lamp vessel 10 for a metal halide high-pressure discharge lamp without an envelope bulb is in itself already operational.
  • the electrode system consisting of power supply lines 12, electrodes 14 'and a fused-in filament holder 14' 'within the lamp vessel 10' only with one Provide filament 14 and the filling process (Fig. 3c) is to be adapted to the requirements of a halogen incandescent lamp.
  • the filling gas filling methods described above can be successfully used for catalyst filling pressures up to approx. 1000 mbar. However, if filling pressures above 1000 mbar are desired, the required amount of the filling gas in question must be frozen out in the lamp vessel 10 before the squeezing process. Depending on the filling pressure, this can be done either by spraying the lamp vessel 10 with a frozen liquid gas (e.g. nitrogen) or by immersing it in the same. These methods are also generally known to the person skilled in the art and do not require any further explanations here.
  • a frozen liquid gas e.g. nitrogen
  • FIGS. 5a to 5c illustrate the manner in which a lamp vessel 10 for a metal halide high-pressure discharge lamp according to FIG. 4 is provided with an envelope bulb 22 if this is not to be operated without one.
  • the envelope bulb 22 is filled with an inert gas, similar to the lamp vessel 10. A detailed description of these work steps can be dispensed with here, since they are essentially the same as in the previously described manufacture of the lamp vessel 10.
  • FIG. 5a shows a lamp vessel 10 for a high pressure metal halide discharge lamp on its Power supply lines 12 have been extended with a further pair of sealing foils 23 and with further power supply lines 24, the ends of which are clamped in a self-holding interchangeable receptacle 25.
  • the interchangeable receptacle 25 with the lamp vessel 10 equipped in this way is guided by means of a device at a precisely predetermined location in the envelope bulb 22 which was previously provided with a dome on one side.
  • the envelope piston 22 located in a holder 26 is heated in the region of the sealing foils 23 by means of the flames 2 and at the same time is flushed with the desired gas, for example nitrogen, through a flushing cannula 27.
  • the desired gas for example nitrogen
  • the envelope piston 22 is then sealed in the heated area by means of the pinch jaws 28 (only partially visible) by means of a pinch 29 (FIG. 5b).
  • the result is a metal halide lamp 30 which has no disruptive pump tube either on the discharge vessel or on the envelope bulb 22.
  • the irrigation cannula 27 is pulled out of the lamp vessel 30 thus obtained, the lamp vessel 30 of the holder 26 and the interchangeable receptacle 25 are removed from the lamp vessel 30 and the projecting tube piece 22 'is separated (FIG. 5c).
  • the lamp vessel 30 thus obtained in the example described having a discharge vessel 10 with a metal halide filling 20, is provided in FIG. 6a with a base 31 of the G12 type.
  • the lamp vessel 10 ' In the case of a halogen incandescent lamp, the lamp vessel 10 'consists of tempered glass and the electrode system 12, 14' requires no sealing foils.
  • the lamp vessel can be enclosed by an envelope bulb 22 be, as shown in the example of Figure 6b, wherein the envelope piston 22 is equipped with a base 32 of the type E27.

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

Claims (22)

  1. Procédé de fabrication d'une enceinte (10) de lampe, qui est rendue étanche au moyen d'un pincement (21) unique et qui présente, du côté éloigné du pincement (21), sensiblement la forme d'une calotte (9), un système d'électrodes, qui comporte au moins deux entrées (12) de courant isolées électriquement l'une de l'autre ainsi que des électrodes (14), qui sont ainsi reliées et qui sont disposées à l'intérieur de l'enceinte (10) de la lampe, passant d'une manière étanche aux gaz à travers le pincement (21), caractérisé par la succession des stades opératoires suivants :
    a) fabrication d'une pièce (5) tubulaire, en verre, fermée d'un côté au moyen d'un rouleau (4) de conformation,
    b) fabrication d'une ébauche (8) avec création, au moyen d'un soufflage, de la forme définitive de l'enceinte (10) de lampe future,
    c) introduction d'un dispositif (11) de réception du courant alternatif, qui maintient le système (12, 13, 14) d'électrodes par l'extrémité ouverte de l'ébauche (8) en un point déterminé à l'avance,
    d) rinçage de nettoyage de l'enceinte (10) de la lampe au moyen d'une canule (17) de rinçage, qui passe par un trou (15) du dispositif (11) de réception du courant alternatif jusqu'à l'enceinte (10) de lampe future,
    e) introduction de la quantité dosée de la substance (20) de remplissage en faisant passer un entonnoir (19) de remplissage dans le trou (15) du dispositif (11) de réception du courant alternatif jusqu'à l'enceinte (10) de lampe future,
    f) fabrication de l'enceinte (10) de lampe en rendant étanche l'extrémité encore ouverte de l'ébauche (8) par un pincement.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste, pour fabriquer la pièce tubulaire (5) fermée d'un côté, à chauffer au milieu un tube (1) en verre ouvert des deux côtés et à le fermer au point chauffé et à le préformer au moyen d'un rouleau (4) symétrique de conformation.
  3. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste, pour souffler l'enceinte (10) de lampe future, à chauffer l'extrémité formée de la pièce (5) tubulaire, à entourer l'extrémité chauffée de mâchoires (7) de conformation et à appliquer à l'extrémité ouverte de la pièce (5) tubulaire au choix un vide (VC) ou une surpression d'azote (pN₂).
  4. Procédé suivant la revendication 1, caractérisé en ce que le dispositif (11) de réception du courant alternatif est muni, sur sa face latérale, d'éléments élastiques, qui s'appliquent, en s'y bloquant, à la paroi intérieure de l'ébauche (8).
  5. Procédé suivant la revendication 1 ou 4, caractérisé en ce qu'il consiste à effectuer l'introduction du dispositif (11) de réception du courant alternatif dans l'ébauche (8) au moyen d'un poinçon, qui est muni d'une butée, de manière que les électrodes (14) prennent leur position définie dans l'enceinte (10) de la lampe.
  6. Procédé suivant la revendication 1, 4 ou 5, caractérisé en ce qu'il consiste à fixer la distance des électrodes (14) entre elles, le cas échéant au moyen d'une entretoise en verre restant dans le pincement (21).
  7. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à effectuer le rinçage de nettoyage pendant 6 secondes environ avec un courant de gaz inerte de 50 l/h à 300 l/h environ, l'enceinte (10) future de lampe étant portée à 1000°C environ.
  8. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste, pour obtenir le pincement (21), à faire passer dans l'enceinte (10) future de lampe, un courant de gaz rare, tout en réchauffant la partie du pincement (21) futur au moyen de la flamme (2) et en refroidissant la partie de la calotte (9) au moyen d'azote (LN₂) liquide.
  9. Procédé suivant la revendication 8, caractérisé en ce que la partie chauffée du pincement (21) future et la partie refroidie de la calotte (9) sont séparées l'une de l'autre par un écran (18) annulaire s'appliquant à la calotte (9).
  10. Procédé suivant la revendication 9, caractérisé en ce qu'il consiste, pour obtenir le pincement (21), à retirer la canule (17) de rinçage de l'ébauche (8).
  11. Procédé suivant la revendication 10, caractérisé en ce que le pincement (21) peut être refroidi par de l'air comprimé, le cas échéant juste après le processus de pincement.
  12. Procédé suivant la revendication 1 ou plusieurs des revendications 1 à 11, caractérisé en ce qu'il consiste à monter l'enceinte (10) de lampe dans une ampoule (22) emplie de gaz.
  13. Procédé suivant la revendication 12, caractérisé en ce qu'il consiste, pour fabriquer l'ampoule (22), à utiliser judicieusement les processus opératoires correspondant aux revendications 1a, 1b, 2 et 3.
  14. Procédé suivant la revendication 12, caractérisé en ce qu'il consiste, pour introduire l'enceinte (10) de lampe dans l'ampoule (22), à enfiler celle-ci munie d'une autre paire de feuilles (23) d'étanchéité et d'entrée (24) de courant, dans un dispositif (25) de réception du courant alternatif et à utiliser judicieusement les processus opératoires correspondant aux revendications 1c, 4 et 5.
  15. Procédé suivant la revendication 12, caractérisé en ce qu'il consiste, pour fermer l'ampoule (22), à la rincer par du gaz inerte en utilisant judicieusement les processus opératoires correspondant aux revendications 1f, 8 et 10 sans refroidissement de la calotte de l'ampoule (22).
  16. Procédé suivant la revendication 12, caractérisé en ce qu'il consiste à séparer le tube (22') en saillie de l'ampoule (22).
  17. Procédé suivant la revendication 12, caractérisé en ce qu'il consiste à munir l'ampoule (22) d'une douille (31, 33).
  18. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste, comme stade opératoire (g) supplémentaire, après le pincement, à séparer la pièce (5) tubulaire qui dépasse encore.
  19. Procédé suivant la revendication 2, caractérisé en ce qu'il consiste à conformer le rouleau de conformation le long de son pourtour de manière à créer un rétrécissement à proximité de l'extrémité fermée de la pièce (5) tubulaire.
  20. Procédé suivant la revendication 1, caractérisé en ce que la pièce tubulaire est en verre au quartz et le système d'électrodes se compose de feuilles d'étanchéité qui relient les entrées de courant aux électrodes.
  21. Procédé suivant la revendication 3, caractérisé en ce qu'il consiste à chauffer une partie élargie à l'extrémité fermée de la pièce tubulaire, à entourer la partie chauffée de mâchoires de conformation ayant une partie de base oblongue pour munir l'enceinte (10) future de lampe d'un rétrécissement et ensuite, d'une partie comprimée transversalement, qui est préformée pour le pincement futur.
  22. Procédé suivant la revendication 1, caractérisé en ce que l'ébauche présente à l'extrémité ouverte a un collet en saillie.
EP89120989A 1988-11-15 1989-11-13 Méthode de fabrication d'une enceinte de lampe Expired - Lifetime EP0369370B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3838697 1988-11-15
DE3838697A DE3838697A1 (de) 1988-11-15 1988-11-15 Verfahren zur herstellung eines lampengefaesses

Publications (3)

Publication Number Publication Date
EP0369370A2 EP0369370A2 (fr) 1990-05-23
EP0369370A3 EP0369370A3 (fr) 1991-04-17
EP0369370B1 true EP0369370B1 (fr) 1994-06-08

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EP89120989A Expired - Lifetime EP0369370B1 (fr) 1988-11-15 1989-11-13 Méthode de fabrication d'une enceinte de lampe

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JP (1) JPH02186530A (fr)
DE (2) DE3838697A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233469A1 (de) * 1992-10-05 1994-04-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer einseitig gequetschten Hochdruckentladungslampe kleiner Leistung und Hochdruckentladungslampen
DE19621329C1 (de) * 1996-05-28 1997-12-04 Schott Glaswerke Verfahren zur Herstellung einer Lampe und nach dem Verfahren hergestellte Lampe
EP1130618A1 (fr) * 2000-02-29 2001-09-05 SIGNAL LUX ITALIA S.p.A. Lampe fluorescente et procédé pour sa fabrication
JP4555591B2 (ja) * 2004-03-31 2010-10-06 株式会社トゥルーウェル 片口放電灯の製造方法
CN112723723B (zh) * 2020-12-25 2022-03-29 江苏晶隆科技有限公司 一种新型玻璃拉管的充氮加压设备及其使用方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262287C (fr) * 1912-07-17
GB282057A (en) * 1926-12-09 1928-03-22 Gen Electric Co Ltd Improvements in the manufacture of electric incandescent lamp bulbs from glass tubing
FR700838A (fr) * 1929-11-07 1931-03-07 Machine pour la fabrication de lampes électriques à incandescence et articles analogues
CH408298A (de) * 1963-06-06 1966-02-28 Otto Isenschmid Jun Fa Vorrichtung zum Abgiessen von Formen
ZA734673B (en) * 1972-07-24 1974-06-26 Thorn Electrical Ind Ltd Improvements relating to lamps
DE3232207A1 (de) * 1982-08-30 1984-03-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe kleiner leistung
US4810932A (en) * 1985-11-15 1989-03-07 General Electric Company Tungsten-halogen incandescent and metal vapor discharge lamps and processes of making such

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Publication number Publication date
JPH02186530A (ja) 1990-07-20
DE58907829D1 (de) 1994-07-14
EP0369370A2 (fr) 1990-05-23
EP0369370A3 (fr) 1991-04-17
DE3838697A1 (de) 1990-05-17

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