DE102006045889A1 - Electrical lamp manufacturing method involves producing pinch seal between foil and quartz glass tube, where area of quartz glass tube is heated and squeezed subsequently in vicinity of foil - Google Patents

Abstract

The method involves arranging ceramic removing container with two ends in an outer piston. The free ends of a power supply line (4) are connected with the free ends of the foil. A pinch seal is produced between a foil and a quartz glass tube, where the area of the quartz glass tube is heated and squeezed subsequently in the vicinity of the foil. Another pinch seal is produced subsequently between another foil and another quartz glass tube, where the area of the later quartz glass tube is heated and squeezed subsequently in the vicinity of the later foil.

Description

Technical area

The The invention relates to a method for producing an electrical Lamp according to the generic term of claim 1. Such lamps are in particular high-pressure discharge lamps for general lighting with outer bulb. These are, in particular, discharge lamps such as metal halide lamps.

State of the art

From the EP-A 1 492 146 a manufacturing method for an electric lamp with an outer bulb is known in which the outer bulb does not completely surround the inner vessel. A variant with a completely surrounding the inner vessel outer bulb is, for example, in EP-A 465 083 specified. An attempt is made to design an outer bulb in a quartz glass discharge vessel in such a way that it is possible to radically eliminate known pumping stem techniques.

Presentation of the invention

It It is an object of the present invention to provide a process for the preparation an electric lamp with outer bulb according to the generic term of claim 1, which is simple and inexpensive. Another task is the reduction of components and a faster production by avoiding lengthy processes. A Another task is to provide a lamp that is simple and cost-effective can be produced.

These The object is achieved by the characterizing features of claim 1 solved. Particularly advantageous embodiments can be found in the dependent claims.

The inventive production process for one electric lamp with an outer bulb and a ceramic inner vessel mainly on metal halide lamps. It can be too around a halogen bulb act with outer bulb. An essential point is that while the outer bulb is thus connected to the inner vessel, that no electrode systems for the outer bulb and no mounts for Power supply through the outer bulb needed become. On a frame can be omitted. Furthermore, will aimed at a kittlosen pedestal, wherein on ceramic base parts is waived. The contact pieces the socket are also suitable as holders of the power supply. Known pumping stem techniques are radically dispensed with both in the inner vessel and at the outer bulb. On protective covers for the power leads in the outer bulb can be waived. For expansion compensation is not necessarily a relief bar required, usually a V-shaped bow at the power supply in the outer bulb. By using niobium as the material of the power supply in the outer envelope can be waived absolutely, because Nb is very soft. In case of power supply made of molybdenum However, it is always advisable to use the stirrups, because molybdenum is clearly visible less plastically deformable.

• a) Bereitstellen eines keramischen Entladungsgefäßes, bei dem Stromzuführungen an beiden Enden aus dem Entladungsgefäß herausragen sowie Bereitstellen von zwei Gestellverlängerungen, die jeweils zumindest eine Folie, ein Kontaktstück und eine diese beiden Teile elektrisch verbindende Zuleitung umfassen;
• b) Verbinden des freien Endes der Stromzuführung mit dem freien Ende der Folie;
• c) Überstülpen eines den Außenabmessungen des Kontaktstücks angepassten ersten Quarzglasrohrs über ein erstes Kontaktstück und die zugehörige Zuleitung und Folie;
• d) Herstellen einer Quetschung in an sich bekannter Weise zwischen Folie und Quarzglasrohr, indem der Bereich des Quarzglasrohrs in der Nähe der Folie erhitzt und anschließend gequetscht wird;
• e) Überstülpen eines rohrartigen Außenkolben-Rohlings über das Entladungsgefäß von der Seite des zweiten Kontaktstücks her sowie eines weiteren Quarzglasrohrs über das zweite Kontaktstück und die zugehörige Zuleitung und Folie, wobei das zum ersten Quarzglasrohr zeigende offene erste Ende des Rohlings soweit reicht, dass eine Überlappung über eine gewisse Zone der Länge L mit dem ersten Quarzglasrohr erzielt wird;
• f) Spülen und anschließendes Aufheizen des offenen ersten Endes des Rohlings;
• g) Verjüngung des offenen ersten Endes;
• h) Erhitzen des verjüngten offenen ersten Endes einschließlich der Überlappungszone des ersten Quarzglasrohrs und weiteres Verjüngen, bis ein vakuumdichter Ver schluss zwischen beiden Teilen entsteht, ggf. unter Zuhilfenahme eines Stauchvorgangs und spätestens jetzt Verbinden des zweiten Quarzglasrohrs mit dem Rohling;
• i) Evakuieren des Außenkolbens über das noch offene zweite Quarzglasrohr, anschließendes Herstellen einer Quetschung in an sich bekannter Weise zwischen zweiter Folie und zweitem Quarzglasrohr, indem der Bereich des Quarzglasrohrs in der Nähe der zweiten Folie erhitzt und anschließend gequetscht wird.

The manufacturing method uses in principle the following steps for producing an electric lamp with Au ßenkolben and arranged therein a ceramic discharge vessel with two ends, which is closed on two sides:

• a) providing a ceramic discharge vessel, wherein the power supply lines protrude from both ends of the discharge vessel and providing two frame extensions, each comprising at least a film, a contact piece and a two connecting these electrically conductive lead;
• b) connecting the free end of the power supply to the free end of the film;
• c) slipping over a first quartz glass tube adapted to the outer dimensions of the contact piece via a first contact piece and the associated feed line and foil;
• d) producing a pinch in a conventional manner between the film and the quartz glass tube by the region of the quartz glass tube is heated in the vicinity of the film and then crushed;
• e) slipping a tube-like outer bulb blank on the discharge vessel from the side of the second contact piece forth and another quartz glass tube via the second contact piece and the associated lead and foil, wherein the first quartz glass tube facing open first end of the blank reaches far enough that an overlap is achieved over a certain zone of length L with the first quartz glass tube;
• f) rinsing and then heating the open first end of the blank;
• g) tapering of the open first end;
• h) heating the tapered open first end including the overlapping zone of the first quartz glass tube and further tapering until a vacuum-tight closure between the two parts is formed, possibly with the aid of a compression process and at least now connecting the second quartz glass tube to the blank;
• i) evacuating the outer bulb via the still open second quartz glass tube, then producing a pinch in a conventional manner between the second foil and the second quartz glass tube by heating the region of the quartz glass tube in the vicinity of the second foil and on is squeezed closing.

Prefers the method is modified so that the outer bulb tube and the second quartz glass tube already before slipping together be connected so that they are a ready-made easily tradable Form building unit.

Brief description of the drawings

in the The invention is based on several embodiments be explained in more detail. The figures show:

1 to 9 the production method of a metal halide lamp with a ceramic discharge vessel;

10 a first embodiment of a lamp;

11 a second embodiment of a lamp.

Preferred embodiment the invention

A manufacturing method is as follows 1 to 9 described: it is first a ceramic discharge vessel 1 finished in a conventional manner, wherein the discharge vessel has a bulbous central part 2 and two cylindrical ends 3 having. Each of the ends protrudes a power supply 4 axially outward. Parallel to this are two frame extensions 5 . 5 ' , each one at least a slide 6 . 6 ' , a contact piece 7 . 7 ' and one of these two parts electrically connecting lead 8th . 8th' include, provided.

In the next step, the free ends of the power supply 4 each with the free end of the film 6 . 6 ' connected. As an alternative, this can first of all also be carried out at a first end.

Subsequently ( 2 ) becomes the discharge vessel 1 in a holder 9 set. Then one becomes the outer dimensions of the contact piece 7 adapted first quartz glass tube 10 over the first contact piece 7 and the associated supply line 8th and finally on the film 6 slipped over (not shown). The quartz glass tube 10 stands a clear piece until the power supply at the first end via ( 3 ).

Now according to 3 the production of a bruise 12 in a conventional manner between the first film 6 and first quartz glass tube 10 by heating the area of the quartz glass tube near the foil ( 11 ) and then, for example by means of a form roller, not shown, squeezed ( 12 ) becomes. This is a rinse nozzle 13 with seal on the outer end of the first quartz glass tube 10 set and then flushed with argon. The heating element 11 For example, as known per se, be a gas burner or diode laser. The bruise 12 becomes known under inert gas as it is known 30 manufactured as oxidation and temperature protection.

At least now in the alternative, the second frame extension 5 ' , each one at least a slide 6 ' , a contact piece 7 ' and one of these two parts e lektrisch connecting supply line 8th' includes, provided and with the second power supply 4 ' connected. Preferably, however, both frame extensions are connected in one operation, as shown.

Now according to 5 a tubular outer bulb blank 15 over the discharge vessel 1 from the side of the second contact piece 7 ' preferably in unit with another quartz glass tube 10 ' over the second contact piece 7 ' and the associated supply line 8th' and foil 6 ' slipped over, with the first quartz glass tube 10 showing open first end 17 of the blank reaches far enough that an overlap over a certain zone of length L with the first quartz glass tube 10 is achieved. This overlapping zone L should preferably be 3 to 7 mm long. A typical value is 5 mm.

This is followed by rinsing (arrows) and subsequent heating 20 the open first end 17 of the blank by means of a rinsing nozzle 18 ( 6 ).

This is followed by a rejuvenation 17 ' the open first end of the blank, preferably by means of a forming roller 21 , please refer 7 ,

Subsequently, according to 8th the heating 25 the rejuvenated open first end 17 ' including the overlapping zone L of the first quartz glass tube 10 and further rejuvenation 17 ' until a vacuum-tight closure between the two parts, ie blank and tube, arises, possibly with the aid of a compression process.

in the Case that no unit is to be used, takes place alternatively no later than now connecting the second quartz glass tube to the blank.

Now, according to 9 the evacuation of the outer bulb on the still open second quartz glass tube, then optionally filling the outer bulb with the desired filling such as nitrogen, etc., see arrows. Subsequently, a pinching takes place in a manner known per se between the second film 6 ' and second quartz glass tube 10 ' in that the region of the second quartz glass tube in the vicinity of the second foil by means of a heater 11 heated and then squeezed.

10 shows schematically the side view of a completed double ended metal halide lamp 35 with the two bruises 12 and 12 ' and the closed outer bulb 15 ' ,

11 shows a second embodiment of a metal halide lamp 36 , in the interior of the outer bulb 15 ' as part of the frame a relief bar 37 is used. This is particularly advantageous if, instead of a filling in the outer bulb, a vacuum is used. The view of 11 is at 90 ° against the view of the first embodiment of a lamp according to 10 turned.

Claims (2)

Method for producing an electric lamp with outer bulb ( 12 ) and with a ceramic discharge vessel arranged therein with two ends, which is closed on both sides ( 2 ), wherein the following method steps are used: a) providing a ceramic discharge vessel, projecting at the both ends of the discharge vessel and providing two frame extensions, each comprising at least a foil, a contact piece and these two parts electrically connecting lead; b) connecting the free end of the power supply to the free end of the film; c) slipping over a first quartz glass tube adapted to the outer dimensions of the contact piece via a first contact piece and the associated feed line and foil; d) producing a pinch in a conventional manner between the film and the quartz glass tube by the region of the quartz glass tube is heated in the vicinity of the film and then crushed; e) slipping a tube-like outer bulb blank on the discharge vessel from the side of the second contact piece forth and another quartz glass tube via the second contact piece and the associated lead and foil, wherein the first quartz glass tube facing open first end of the blank reaches far enough that an overlap over a certain zone of length L with the first quartz glass tube is achieved; f) rinsing and then heating the open first end of the blank; g) tapering of the open first end; h) heating the tapered open first end including the overlapping zone of the first quartz glass tube and further tapering until a vacuum-tight closure between the two parts is formed, possibly with the aid of an upsetting operation and at the latest now connecting the second quartz glass tube to the blank; i) Evacuating the outer bulb via the still open second quartz glass tube, then producing a pinch in a conventional manner between the second foil and the second quartz glass tube by the region of the quartz glass tube is heated in the vicinity of the second film and then pinched. Method according to claim 1, characterized in that that outer bulb tube and second quartz glass tube already connected before slipping become.