EP1135788B1 - Method for inserting a pumping rod in a discharge chamber - Google Patents

Method for inserting a pumping rod in a discharge chamber Download PDF

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Publication number
EP1135788B1
EP1135788B1 EP00958190A EP00958190A EP1135788B1 EP 1135788 B1 EP1135788 B1 EP 1135788B1 EP 00958190 A EP00958190 A EP 00958190A EP 00958190 A EP00958190 A EP 00958190A EP 1135788 B1 EP1135788 B1 EP 1135788B1
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EP
European Patent Office
Prior art keywords
opening
adapter
exhaust tube
section
frame
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
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EP00958190A
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German (de)
French (fr)
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EP1135788A1 (en
Inventor
Michael Seibold
Michael Ilmer
Angela Eberhardt
Hermann Speer
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Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • 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
    • 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
    • H01J9/385—Exhausting 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels

Definitions

  • the present invention relates to a manufacturing method for flat discharge vessels with two housing plates connected by a flat frame.
  • the pump stem In the case of discharge vessels for discharge lamps, the pump stem is conventionally used inserted into an opening in the lamp housing, the remaining Gap must be filled with glass solder as sealing material. To do this in pasty form possibly brushed and dried several times.
  • the invention is therefore based on the technical problem, one with regard to the Inserting a pump stem improved method for manufacturing a discharge vessel specify.
  • a method for producing a flat one Discharge vessel with a frame connecting two housing plates in which a pump stem in an opening in the frame with a square inner cross section with a round outer cross section is used tightly, with between the Pump stem and the inner wall of the opening inserted a fixed intermediate piece is that a continuous to the round outer cross section of the stem Opening and a square one adapted to the square inner cross-section
  • the pump stem should close well with the inner wall of the opening, to enable a tight connection.
  • the invention is based on the fact that it is simpler overall and the Establish the most reliable connections between the pump stems and the discharge vessel leave, if an additional, conventionally not necessary part is used.
  • This is the intermediate piece according to the invention, the due to its physical shape, an adaptation of the shape between the cross section of the Pumpstengel and the inner opening cross section. This allows namely a free choice of the shape of the stem and the shape of the opening in the lamp housing of the flat spotlight.
  • pump stems with a round outer cross-section are used, which, for example as simple glass tubes, are not only easy to manufacture and to handle, but also the slightest difficulty in Show with regard to thermal stresses during the manufacturing process.
  • an angular opening can be used in the discharge vessel.
  • an angular opening is much easier to install than a round opening.
  • an angular opening can be easily made in the frame attach a flat discharge vessel, for example, that simply a Piece of the frame is completely cut out or cut out so that the opening delimited on two sides by the plates of the lamp housing of the flat spotlight is.
  • the solid intermediate piece can be produced as a semi-finished product without great expense and simplifies the process in that the fit between the adapter and pump stem or opening inner wall and intermediate piece either so far is improved that a thin glass solder layer is sufficient for the tight connection, or by adapting the shape of the intermediate piece when inserting it.
  • To the intermediate piece must be at least slightly softened in order to press the take the required shape to fit in the opening and / or on the pump stem.
  • the relevant part of the discharge vessel and the pump stem exist of glass. Then it makes sense to also use a glass material for the intermediate piece to choose.
  • the term glass material also includes so-called glass ceramics. In the case of a shape adjustment when inserting is in any case a material to choose that can be thermally softened.
  • the adapter is optimally adjusted by a shape adjustment when inserting
  • softening is necessary.
  • a material is chosen for the intermediate piece, its softening temperature (in the case of selective solid-liquid transitions means melting temperature) lower than the corresponding temperature of the material of the stem and the relevant one Part of the discharge vessel, i.e. the inner wall.
  • the softening temperature in the case of selective solid-liquid transitions means melting temperature
  • a preferred application for the method according to the invention is discharge lamps, especially those designed for dielectrically disabled discharges are, that is to say have at least one electrode, of the discharge volume is separated by a dielectric layer.
  • Such discharge lamps are also referred to as silent discharge lamps.
  • the opening in the frame can, for example, thereby arise that a glass strand used for the frame is not in its length sufficient for the scope of the shape to be formed by the frame, that is Correspondingly, the width of the opening is too short.
  • an opening in an originally essentially closed frame be cut, preferably by water jet cutting or by Saws.
  • essentially flat cut surfaces are created, see above that together with the boundaries through the plates of the discharge vessel a rectangular inner cross section of the opening results. It has already been executed that the invention by adapting the conveniently round outer cross section a pump stem to this shape the effort for the easy to manufacture square adapter overcompensated, e.g. with regard to the achievable high reliability the connection between the pump stem and the discharge vessel.
  • the required adapter can be inexpensive and simple in various ways getting produced. Injection molding, pressing or extrusion are possible, especially of glass materials (glass or glass solder). Strand shapes can also be used are produced, which then have to be cut to length. This is especially true for extrusion. When pressing, you can also use binder-free glass solder / powder be worked.
  • a glass solder is used for the intermediate piece, which with a thermoplastic binder material is mixed.
  • the thermoplastic binder material is used to shape the glass solder at relatively low temperatures and can can be baked at higher temperatures by a later step. That means, that the batch of glass solder and binder in the manufacture of an extrusion strand or a finished intermediate piece in a rather viscous state can be softened and then the glass solder itself to make a seal melted between the pump stem and the discharge vessel opening in the true sense can become liquid-like.
  • the glass solder is preferably designed so that the intermediate piece production taking advantage of the thermoplastic properties of the binder, for example by extrusion and cutting to length e.g. B. at 130 ° C-180 ° C, then the intermediate piece attached to the pump stem and by a temperature step for example 430-490 ° C is debindered and sintered and finally when joining a fusion of the entire discharge vessel at the joining temperature of the intermediate piece in the opening
  • a laser can also be used for the different temperature steps, for example for local heating of the intermediate piece inserted into the opening. This avoids large-volume heating of the discharge vessel, which can be beneficial for various reasons. Please refer to this to the parallel application "Manufacturing process for a gas discharge lamp" same applicant from the same filing date. This applies in particular to the use of infrared absorbing additives.
  • light sources or heat sources can also be used, for example infrared heaters, ovens or flames.
  • Figure 1 illustrates the method according to the invention schematically with a glass frame 1 of a silent flat radiator, which is otherwise not shown in detail. It will back to the above-mentioned application for the technology of silent flat radiators directed.
  • the glass frame 1 has an opening 2 in the form of a through flat side surfaces delimiting the gap in one side edge of the frame 1 forming glass strand.
  • the inside of the discharge vessel corresponds to the one on the right upper side of the figure.
  • a pump stem 3 with a tubular basic shape shown.
  • an inventive Intermediate piece 4 is placed, which accordingly has a through opening 5 has an inner cross section corresponding to the pump stem 3.
  • the intermediate piece 4 corresponds to that in its outer dimensions to a certain extent Frame 1 in the opening 2 missing piece. That means the outside cross section (in the longitudinal direction of the pump stem or in the direction of insertion) of the intermediate piece 4 is adapted to the shape and dimensions of the opening 2, in this case the rectangular one Cross-sectional shape of the missing frame piece of 6.5 mm x 6.5 mm at a clearance of 0.2 mm each.
  • Figures 2a and 2b show the intermediate piece 4 enlarged
  • in the left Half in Figure 2a is a side view transverse to the longitudinal direction of the stem 3 seen and in the right half in Figure 2b an elevation in the longitudinal direction of the pump stem 3 is drawn.
  • In the left side view is with dashed lines the cylindrical cross section recognizable on the right side through opening 5 indicated.
  • the opening 5 has one with the double arrow indicated inner diameter of 5 mm, the outer diameter of the Pump stem 3 corresponds to a play of 0.1 mm.
  • Typical dimensions for the opening cross section 2 are generally in the range a few mm per edge. It should be noted that the intermediate piece 4 in the sintering step shrinks to a correspondingly larger degree in extrusion Compared to the size of the opening 2 and the stem 3 must be considered.
  • Figure 3 shows the pump stem 3 in a lateral view, with the front end on the left side in Figure 3, the intermediate piece 4 from Figure 2 is placed.
  • Powdered lead borosilicate glass becomes made a moldable glass material with a thermoplastic binder system. This glass material is extruded at about 150 ° C into a strand that is has a profile according to FIG. 2b. From this strand are cut using a diamond circular saw or a hot wire cut individual spacers 4. The Intermediate pieces 4 are plugged onto conventional round tubular pump stems 3. For this purpose, the inner diameter of the opening 5 in each intermediate piece 4 is sufficient Play (e.g. 0.1 mm) compared to the outer diameter of the stem 3. The configuration from FIG. 3 is thus achieved.
  • each pump stem 3 provided with an intermediate piece 4 inserted into a suitable opening 2 of a frame 1 of a flat radiator.
  • the opening 2 is by water jet cutting before assembling the flat radiator housing been cut out of the frame.
  • the figure 1 plates of the flat radiator, not shown, with the frame over a glass solder paste loosely connected.
  • the pump stem 3 with the intermediate piece 4 in the opening 2 inserted loosely.
  • the entire structure is placed in an oven and treated with a conventional joining step at elevated temperature.
  • the plates connect firmly to the frame 1; merges at the same time the intermediate piece 4 in the opening 2 vacuum-tight.
  • the frame 1, the plates, not shown, and the pump stem 3 are not significantly softened.
  • An alternative embodiment replaces the fusion of the intermediate piece 4 during the joining step in the furnace as well as the joining step itself by means of a Irradiation with an infrared laser, with which also a vacuum-tight connection is produced between the frame 1 and the plates of the flat radiator.
  • a vacuum-tight connection is produced between the frame 1 and the plates of the flat radiator.

Abstract

In a novel method in the field of the production of discharge vessels, in particular for silent flat radiators, an exhaust tube 3 for evacuating and filling is inserted into an opening 2 in the discharge vessel, it being possible in a simple way by means of an adapter 4 to achieve optimum fitting and sealing between a square inner cross section of the opening 2 and a round outer cross section of the exhaust tube 3.

Description

Die vorliegende Erfindung bezieht sich auf ein Herstellungsverfahren für flache Entladungsgefäße mit zwei von einem flachen Rahmen verbundenen Gehäuseplatten.The present invention relates to a manufacturing method for flat discharge vessels with two housing plates connected by a flat frame.

Bei Entladungsgefäßen für Entladungslampen wird konventionellerweise der Pumpstengel in eine Öffnung des Lampengehäuses eingesetzt, wobei der verbleibende Zwischenraum mit Glaslot als Dichtmaterial verfüllt werden muß. Dazu wird dieses in pastöser Form eventuell mehrfach aufgepinselt und getrocknet.In the case of discharge vessels for discharge lamps, the pump stem is conventionally used inserted into an opening in the lamp housing, the remaining Gap must be filled with glass solder as sealing material. To do this in pasty form possibly brushed and dried several times.

Diese Vorgehensweise hat verschiedene Nachteile. Zum einen ist sie sehr zeitintensiv. Zum zweiten ist sie schlecht für eine automatisierte Massenfertigung geeignet. Zum dritten entstehen beim Trocknen der aufgepinselten Schichten Trockenrisse, die durch wieder Überstreichen und wieder Trocknen ausgebessert werden müssen. Dennoch sind Undichtigkeiten nicht immer auszuschließen. Außerdem werden die beiden zuvor genannten Nachteile dann durch die Notwendigkeit einer Wiederholung desThis approach has several disadvantages. For one thing, it is very time-consuming. Secondly, it is poorly suited for automated mass production. Thirdly, drying cracks form when the brushed layers are dried must be repaired by painting over and drying again. Yet leaks cannot always be excluded. In addition, the two then mentioned disadvantages then by the need to repeat the

Verfahrensablaufs noch verstärkt. US-A-5066257 beschreibt ein solches Verfahren.Procedural sequence reinforced. US-A-5066257 describes such a method.

Der Erfindung liegt somit das technische Problem zugrunde, ein im Hinblick auf das Einsetzen eines Pumpstengels verbessertes Verfahren zur Herstellung eines Entladungsgefäßes anzugeben.The invention is therefore based on the technical problem, one with regard to the Inserting a pump stem improved method for manufacturing a discharge vessel specify.

Erfindungsgemäß ist dazu vorgesehen ein Verfahren zum Herstellen eines flachen Entladungsgefäßes mit einem zwei Gehäuseplatten verbindenden Rahmen ,bei dem in eine Öffnung in dem Rahmen mit einem eckigen Innenquerschnitt ein Pumpstengel mit einem runden Außenquerschnitt dicht eingesetzt wird, wobei zwischen den Pumpstengel und die Innenwand der Öffnung ein festes Zwischenstück eingesetzt wird, das eine an den runden Außenquerschnitt des Pumpstengels angepaßte durchgehende Öffnung und einen an den eckigen Innenquerschnitt angepaßten eckigenAccording to the invention there is provided a method for producing a flat one Discharge vessel with a frame connecting two housing plates, in which a pump stem in an opening in the frame with a square inner cross section with a round outer cross section is used tightly, with between the Pump stem and the inner wall of the opening inserted a fixed intermediate piece is that a continuous to the round outer cross section of the stem Opening and a square one adapted to the square inner cross-section

Außenquerschnitt aufweist.Has external cross section.

Grundsätzlich soll der Pumpstengel mit der Innenwand der Öffnung gut abschließen, um eine dichte Verbindung zu ermöglichen. Im Hinblick darauf wäre es an sich anzustreben, den Außenquerschnitt des Pumpstengels und den Innenquerschnitt der Öffnung möglichst ähnlich zu wählen, d.h. keine grundsätzlichen Formabweichungen zuzulassen, so daß nur geringe Maßabweichungen ausgeglichen werden müssen. Wenn nämlich die durch ein Dichtungsmaterial, etwa Glaslot, das flüssig aufgetragen wird, auszugleichenden Zwischenräume zu groß werden, kommt es zu Problemen mit der Dichtigkeit. Dies ist wohl auf Risse in dem Dichtungsmaterial zurückzuführen.Basically, the pump stem should close well with the inner wall of the opening, to enable a tight connection. In view of this, it would be desirable to the outer cross section of the pump stem and the inner cross section of the Choose the opening as similar as possible, i.e. no fundamental form deviations allow, so that only small dimensional deviations have to be compensated. If namely through a sealing material, such as glass solder, the liquid applied If the gaps to be compensated become too large, problems arise with the tightness. This is probably due to cracks in the sealing material.

Die Erfindung geht jedoch davon aus, daß es insgesamt einfacher ist und sich die zuverlässigsten Verbindungen zwischen Pumpstengeln und Entladungsgefäß herstellen lassen, wenn ein zusätzliches, konventionellerweise gar nicht notwendiges Teil verwendet wird. Dabei handelt es sich um das erfindungsgemäße Zwischenstück, das durch seine körperliche Ausgestaltung eine Formanpassung zwischen dem Pumpstengelaußenquerschnitt und dem Öffnungsinnenquerschnitt herstellt. Dies erlaubt nämlich eine freie Wahl der Form des Pumpstengels und der Form der Öffnung in dem Lampengehäuse des Flachstrahlers.The invention is based on the fact that it is simpler overall and the Establish the most reliable connections between the pump stems and the discharge vessel leave, if an additional, conventionally not necessary part is used. This is the intermediate piece according to the invention, the due to its physical shape, an adaptation of the shape between the cross section of the Pumpstengel and the inner opening cross section. This allows namely a free choice of the shape of the stem and the shape of the opening in the lamp housing of the flat spotlight.

Die dadurch erzielten Vereinfachungen und Vorteile in der Zuverlässigkeit des Herstellungsprozesses überkompensieren den zusätzlichen Aufwand für die Herstellung des Zwischenstücks. Einerseits können Pumpstengel mit rundem Außenquerschnitt verwendet werden, die, beispielsweise als einfache Glasrohre, nicht nur einfach herzustellen und handzuhaben sind, sondern auch die geringsten Schwierigkeiten im Hinblick auf thermische Spannungen während des Herstellungsprozesses zeigen. Andererseits kann eine eckige Öffnung in dem Entladungsgefäß verwendet werden. The resulting simplifications and advantages in the reliability of the manufacturing process overcompensate the additional effort for the production of the intermediate piece. On the one hand, pump stems with a round outer cross-section are used, which, for example as simple glass tubes, are not only easy to manufacture and to handle, but also the slightest difficulty in Show with regard to thermal stresses during the manufacturing process. On the other hand, an angular opening can be used in the discharge vessel.

In vielen Fällen ist eine solche eckige Öffnung sehr viel einfacher anzubringen als eine runde Öffnung. Insbesondere läßt sich eine eckige Öffnung gut in dem Rahmen eines flachen Entladungsgefäßes anbringen, beispielsweise dadurch, daß einfach ein Stück des Rahmens vollständig ausgespart oder ausgeschnitten wird, so daß die Öffnung an zwei Seiten von den Platten des Lampengehäuses des Flachstrahlers begrenzt ist.In many cases, such an angular opening is much easier to install than a round opening. In particular, an angular opening can be easily made in the frame attach a flat discharge vessel, for example, that simply a Piece of the frame is completely cut out or cut out so that the opening delimited on two sides by the plates of the lamp housing of the flat spotlight is.

Das feste Zwischenstück läßt sich als Halbzeug ohne großen Kostenaufwand herstellen und vereinfacht das Verfahren dadurch, daß die Passung zwischen Zwischenstück und Pumpstengel bzw. Öffnungsinnenwand und Zwischenstück entweder schon soweit verbessert ist, daß eine dünne Glaslotschicht zur dichten Verbindung ausreicht, oder durch eine Formanpassung des Zwischenstücks beim Einsetzen erfolgt. Dazu muß das Zwischenstück zumindest etwas erweicht werden, um durch Andruck die benötigte Form zur Passung in die Öffnung und/oder an den Pumpstengel anzunehmen.The solid intermediate piece can be produced as a semi-finished product without great expense and simplifies the process in that the fit between the adapter and pump stem or opening inner wall and intermediate piece either so far is improved that a thin glass solder layer is sufficient for the tight connection, or by adapting the shape of the intermediate piece when inserting it. To the intermediate piece must be at least slightly softened in order to press the take the required shape to fit in the opening and / or on the pump stem.

In vielen Fällen bestehen der relevante Teil des Entladungsgefäßes und des Pumpstengels aus Glas. Dann bietet es sich an, auch ein Glasmaterial für das Zwischenstück zu wählen. Unter den Begriff Glasmaterial fallen dabei auch sogenannte Glaskeramiken. Im Fall einer Formanpassung beim Einsetzen ist jedenfalls ein Material zu wählen, das thermisch erweicht werden kann.In many cases, the relevant part of the discharge vessel and the pump stem exist of glass. Then it makes sense to also use a glass material for the intermediate piece to choose. The term glass material also includes so-called glass ceramics. In the case of a shape adjustment when inserting is in any case a material to choose that can be thermally softened.

Wenn das Zwischenstück durch eine Formanpassung beim Einsetzen optimal angepaßt werden soll, ist, wie bereits erwähnt, eine Erweichung notwendig. Vorzugsweise wird dabei ein Material für das Zwischenstück gewählt, dessen Erweichungstemperatur (das meint im Fall punktueller Fest-Flüssig-Übergänge Schmelztemperatur) tiefer als die entsprechende Temperatur des Materials des Pumpstengels und des relevanten Teils des Entladungsgefäßes , also der Innenwand liegt. Dann kann durch eine Erwärmung eine Erweichung des Zwischenstücks erreicht werden, ohne daß eine wesentliche Erweichung des Pumpstengels oder der Innenwand auftritt. Diese können dann als feste Bauteile über das sich raumanpassende Zwischenstück zusammengefügt werden. Dabei ist es bevorzugt, jedoch nicht notwendig, daß die Erweichung des Zwischenstücks für eine dichte Verbindung der beim letztendlichen Aneinanderfügen aufeinander stoßenden Flächen sorgt. Das gilt insbesondere für Glasmaterialien.If the adapter is optimally adjusted by a shape adjustment when inserting As already mentioned, softening is necessary. Preferably a material is chosen for the intermediate piece, its softening temperature (in the case of selective solid-liquid transitions means melting temperature) lower than the corresponding temperature of the material of the stem and the relevant one Part of the discharge vessel, i.e. the inner wall. Then by heating a softening of the intermediate piece can be achieved without an essential Softening of the pedicle or the inner wall occurs. these can then assembled as solid components via the space-adapting intermediate piece become. It is preferred, but not necessary, that the softening of the Intermediate piece for a tight connection when finally joining together colliding surfaces. This applies in particular to glass materials.

Es hat sich als sinnvoll herausgestellt, das Zwischenstück bereits vor dem Einsetzen in die Öffnung auf den Pumpstengel aufzusetzen und mit dem Pumpstengel dicht zu verbinden, so daß beim letztlichen Einsetzen von Pumpstengel und Zwischenstück in die Öffnung nunmehr eine dichte Verbindung (und gegebenenfalls Formanpassung) mit der Öffnung des Entladungsgefäßes vorgenommen werden muß. Hierdurch wird der Arbeitsablauf weiter vereinfacht, insbesondere können die mit Zwischenstücken versehenen Pumpstengel in einem separaten Arbeitsschritt in größerer Zahl vorgefertigt werden.It turned out to be useful to have the adapter before inserting it to place in the opening on the pump stem and close tightly with the pump stem connect so that when inserting the pump stem and adapter in the opening is now a tight connection (and, if necessary, shape adjustment) must be done with the opening of the discharge vessel. This will the workflow is further simplified, especially those with spacers provided pump stems in a separate work step in large numbers become.

Ein bevorzugter Anwendungsfall für das erfindungsgemäße Verfahren sind Entladungslampen, insbesondere solche, die für dielektrisch behinderte Entladungen ausgelegt sind, also zumindest eine Elektrode aufweisen, die vom Entladungsvolumen durch eine dielektrische Schicht getrennt ist. Solche Entladungslampen werden auch als stille Entladungslampen bezeichnet. Es wird z.B. verwiesen auf die vorherige deutsche Patentanmeldung 197 11 890.9 derselben Anmelderine.A preferred application for the method according to the invention is discharge lamps, especially those designed for dielectrically disabled discharges are, that is to say have at least one electrode, of the discharge volume is separated by a dielectric layer. Such discharge lamps are also referred to as silent discharge lamps. For example referred to the previous one German patent application 197 11 890.9 from the same applicant.

Wie bereits angedeutet, kann die Öffnung in dem Rahmen beispielsweise dadurch entstehen, daß ein für den Rahmen verwendeter Glasstrang in seiner Länge nicht ganz für den Umfang der durch den Rahmen zu bildenden Form ausreicht, also der Breite der Öffnung entsprechend zu kurz bemessen ist. Es kann jedoch auch nachträglich eine Öffnung in einen ursprünglich im wesentlichen geschlossenen Rahmen eingeschnitten werden, vorzugsweise durch Wasserstrahlschneiden oder auch durch Sägen. Im einfachsten Fall entstehen dabei im wesentlichen ebene Schnittflächen, so daß sich gemeinsam mit den Begrenzungen durch die Platten des Entladungsgefäßes ein rechteckiger Innenquerschnitt der Öffnung ergibt. Es wurde bereits ausgeführt, daß die Erfindung durch die Anpassung des günstigerweise runden Außenquerschnitts eines Pumpstengels an diese Form den Aufwand für das leicht herstellbare eckige Zwischenstück überkompensiert, u.a. im Hinblick auf die erzielbare hohe Zuverlässigkeit der Verbindung zwischen Pumpstengel und Entladungsgefäß.As already indicated, the opening in the frame can, for example, thereby arise that a glass strand used for the frame is not in its length sufficient for the scope of the shape to be formed by the frame, that is Correspondingly, the width of the opening is too short. However, it can also be added later an opening in an originally essentially closed frame be cut, preferably by water jet cutting or by Saws. In the simplest case, essentially flat cut surfaces are created, see above that together with the boundaries through the plates of the discharge vessel a rectangular inner cross section of the opening results. It has already been executed that the invention by adapting the conveniently round outer cross section a pump stem to this shape the effort for the easy to manufacture square adapter overcompensated, e.g. with regard to the achievable high reliability the connection between the pump stem and the discharge vessel.

Das erforderliche Zwischenstück kann in verschiedener Weise preiswert und einfach hergestellt werden. In Frage kommen ein Spritzgießen, Pressen oder Extrudieren, insbesondere von Glasmaterialien (Glas oder Glaslot). Dabei können auch Strangformen hergestellt werden, die dann noch abgelängt werden müssen. Dies gilt insbesondere für die Extrusion. Beim Pressen kann auch mit binderfreiem Glaslot/-pulver gearbeitet werden.The required adapter can be inexpensive and simple in various ways getting produced. Injection molding, pressing or extrusion are possible, especially of glass materials (glass or glass solder). Strand shapes can also be used are produced, which then have to be cut to length. This is especially true for extrusion. When pressing, you can also use binder-free glass solder / powder be worked.

Vorzugsweise wird ein Glaslot für das Zwischenstück verwendet, das mit einem thermoplastischen Bindermaterial vermengt ist. Das thermoplastische Bindermaterial dient zur Formgebung des Glaslots bei relativ niedrigen Temperaturen und kann durch einen späteren Schritt mit höheren Temperaturen ausgeheizt werden. Das bedeutet, daß das Gemenge aus Glaslot und Binder bei der Herstellung eines Extrusionsstrangs oder eines fertigen Zwischenstücks in einen eher zäh-viskosen Zustand erweicht werden kann und dann das Glaslot selbst zur Herstellung einer Abdichtung zwischen Pumpstengel und Entladungsgefäßöffnung im eigentlichen Sinn aufgeschmolzen werden kann, also flüssigkeitsähnlich wird.Preferably, a glass solder is used for the intermediate piece, which with a thermoplastic binder material is mixed. The thermoplastic binder material is used to shape the glass solder at relatively low temperatures and can can be baked at higher temperatures by a later step. That means, that the batch of glass solder and binder in the manufacture of an extrusion strand or a finished intermediate piece in a rather viscous state can be softened and then the glass solder itself to make a seal melted between the pump stem and the discharge vessel opening in the true sense can become liquid-like.

Es ist auch möglich, das Zwischenstück zunächst auf den Pumpstengel aufzusintern und das Zwischenstück dann in der Entladungsgefäßöffnung einzuschmelzen. Dabei muß das Zwischenstück mit dem Pumpstengel nur lose in die Öffnung eingelegt werden. Vorzugsweise ist dabei das Glaslot so ausgelegt, daß die Zwischenstückherstellung unter Ausnutzung der thermoplastischen Eigenschaften des Binders beispielsweise durch Extrusion und Ablängen z. B. bei 130°C-180°C erfolgt, dann das Zwischenstück auf den Pumpstengel aufgesteckt und durch einen Temperaturschritt bei beispielsweise 430-490°C entbindert und aufgesintert wird und schließlich beim Fügen des gesamten Entladungsgefäßes bei der Fügetemperatur eine Verschmelzung des Zwischenstücks in der Öffnung erfolgtIt is also possible to first sinter the intermediate piece onto the pump stem and then melt the intermediate piece in the discharge vessel opening. there the adapter with the pump handle only has to be inserted loosely into the opening. The glass solder is preferably designed so that the intermediate piece production taking advantage of the thermoplastic properties of the binder, for example by extrusion and cutting to length e.g. B. at 130 ° C-180 ° C, then the intermediate piece attached to the pump stem and by a temperature step for example 430-490 ° C is debindered and sintered and finally when joining a fusion of the entire discharge vessel at the joining temperature of the intermediate piece in the opening

Für die verschiedenen Temperaturschritte kann auch ein Laser verwendet werden, beispielsweise zur lokalen Erhitzung des in die Öffnung eingesetzten Zwischenstücks. Dadurch wird eine großvolumige Erwärmung des Entladungsgefäßes vermieden, was aus verschiedenen Gründen von Vorteil sein kann. Hierzu wird verwiesen auf die Parallelanmeldung "Herstellungsverfahren für eine Gasentladungslampe" derselben Anmelderin vom selben Anmeldetag. Dies betrifft insbesondere auch die Verwendung von infrarotabsorbierenden Zusätzen.A laser can also be used for the different temperature steps, for example for local heating of the intermediate piece inserted into the opening. This avoids large-volume heating of the discharge vessel, which can be beneficial for various reasons. Please refer to this to the parallel application "Manufacturing process for a gas discharge lamp" same applicant from the same filing date. This applies in particular to the use of infrared absorbing additives.

Es können natürlich auch andere Lichtquellen oder Wärmequellen verwendet werden, beispielsweise Infrarotstrahler, Öfen oder Flammen.Of course, other light sources or heat sources can also be used, for example infrared heaters, ovens or flames.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels besprochen, wobei dabei offenbarte Merkmale auch in anderen Kombinationen erfindungswesentlich sein können.The invention is discussed below using an exemplary embodiment, the features disclosed also essential to the invention in other combinations could be.

Im einzelnen zeigt:

  • Figur 1 einen mit einem erfindungsgemäßen Zwischenstück versehenen Pumpstengel vor dem Einführen in eine Öffnung eines Flachstrahlerrahmens;
  • Figuren 2a und 2b eine Seiten- und eine Aufrißansicht des Zwischenstücks aus Figur 1; und
  • Figur 3 eine Seitenansicht des Pumpstengels mit aufgesetztem Zwischenstück.
    • In detail shows:
  • 1 shows a pump stem provided with an intermediate piece according to the invention before insertion into an opening in a flat radiator frame;
  • Figures 2a and 2b are side and elevation views of the adapter of Figure 1; and
  • Figure 3 is a side view of the pump stem with the intermediate piece attached.

    • Figur 1 illustriert das erfindungsgemäße Verfahren schematisch mit einem Glasrahmen 1 eines stillen Flachstrahlers, der im übrigen nicht näher dargestellt ist. Es wird wieder auf die eingangs zitierte Anmeldung zur Technologie stiller Flachstrahler verwiesen. Der Glasrahmen 1 weist eine Öffnung 2 in Form einer durch im wesentlichen ebene Seitenflächen begrenzten Lücke in dem eine Seitenkante des Rahmens 1 bildenden Glasstrang auf. Das Innere des Entladungsgefäßes entspricht der rechten oberen Seite der Figur. Figure 1 illustrates the method according to the invention schematically with a glass frame 1 of a silent flat radiator, which is otherwise not shown in detail. It will back to the above-mentioned application for the technology of silent flat radiators directed. The glass frame 1 has an opening 2 in the form of a through flat side surfaces delimiting the gap in one side edge of the frame 1 forming glass strand. The inside of the discharge vessel corresponds to the one on the right upper side of the figure.

    Im linken unteren Bereich ist ein Pumpstengel 3 mit einer rohrförmigen Grundform dargestellt. Auf ein vorderes Ende des Pumpstengels 3 ist ein erfindungsgemäßes Zwischenstück 4 aufgesetzt, das dementsprechend eine durchgehende Öffnung 5 mit einem dem Pumpstengel 3 entsprechenden Innenquerschnitt aufweist. Das Zwischenstück 4 entspricht in seinen Außenabmessungen gewissermaßen dem dem Rahmen 1 in der Öffnung 2 fehlenden Stück. Das bedeutet, daß der Außenquerschnitt (in Längsrichtung des Pumpstengels bzw. in Einführrichtung) des Zwischenstücks 4 angepaßt ist auf die Form und die Maße der Öffnung 2, in diesem Fall auf die rechteckige Querschnittsform des fehlenden Rahmenstücks von 6,5 mm x 6,5 mm bei einem Spiel von 0,2 mm jeweils.In the lower left area is a pump stem 3 with a tubular basic shape shown. On a front end of the pump stem 3 is an inventive Intermediate piece 4 is placed, which accordingly has a through opening 5 has an inner cross section corresponding to the pump stem 3. The intermediate piece 4 corresponds to that in its outer dimensions to a certain extent Frame 1 in the opening 2 missing piece. That means the outside cross section (in the longitudinal direction of the pump stem or in the direction of insertion) of the intermediate piece 4 is adapted to the shape and dimensions of the opening 2, in this case the rectangular one Cross-sectional shape of the missing frame piece of 6.5 mm x 6.5 mm at a clearance of 0.2 mm each.

    Die Figuren 2a und 2b zeigen das Zwischenstück 4 vergrößert, wobei in der linken Hälfte in Figur 2a eine Seitenansicht quer zur Längsrichtung des Pumpstengels 3 gesehen und in der rechten Hälfte in Figur 2b eine Aufrißdarstellung in Längsrichtung des Pumpstengels 3 gesehen gezeichnet ist. In der linken Seitendarstellung ist mit gestrichelten Linien die in der rechten Seite im Querschnitt erkennbare zylindrische durchgehende Öffnung 5 angedeutet. Die Öffnung 5 hat einen mit dem Doppelpfeil angedeuteten Innendurchmesser von 5 mm, der dem Außendurchmesser des Pumpstengels 3 bei einem Spiel von 0,1 mm entspricht.Figures 2a and 2b show the intermediate piece 4 enlarged, in the left Half in Figure 2a is a side view transverse to the longitudinal direction of the stem 3 seen and in the right half in Figure 2b an elevation in the longitudinal direction of the pump stem 3 is drawn. In the left side view is with dashed lines the cylindrical cross section recognizable on the right side through opening 5 indicated. The opening 5 has one with the double arrow indicated inner diameter of 5 mm, the outer diameter of the Pump stem 3 corresponds to a play of 0.1 mm.

    Typische Abmessungen für den Öffnungsquerschnitt 2 liegen allgemein im Bereich einiger mm pro Kante. Zu beachten ist, daß das Zwischenstück 4 im Sinterschritt schrumpft, also bei der Strangextrusion auf ein dementsprechend größeres Maß im Vergleich zu dem Maß der Öffnung 2 und des Pumpstengels 3 geachtet werden muß.Typical dimensions for the opening cross section 2 are generally in the range a few mm per edge. It should be noted that the intermediate piece 4 in the sintering step shrinks to a correspondingly larger degree in extrusion Compared to the size of the opening 2 and the stem 3 must be considered.

    Figur 3 zeigt den Pumpstengel 3 in seitlicher Darstellung, wobei auf das vordere Ende auf der linken Seite in Figur 3 das Zwischenstück 4 aus Figur 2 aufgesetzt ist.Figure 3 shows the pump stem 3 in a lateral view, with the front end on the left side in Figure 3, the intermediate piece 4 from Figure 2 is placed.

    Das Verfahren läuft wir folgt ab: Aus pulverisiertem Bleiborsilikatglas (Glaslot) wird mit einem thermoplastischen Bindersystem ein formbares Glasmaterial hergestellt. Dieses Glasmaterial wird bei etwa 150°C maßgenau zu einem Strang extrudiert, der ein Profil gemäß Figur 2b aufweist. Von diesem Strang werden mit Hilfe einer Diamantkreissäge oder einem heißen Draht einzelne Zwischenstücke 4 abgelängt. Die Zwischenstücke 4 werden auf übliche rundrohrförmige Pumpstengel 3 aufgesteckt. Hierzu hat der Innendurchmesser der Öffnung 5 in jedem Zwischenstück 4 ausreichend Spiel (z. B. 0,1 mm) gegenüber dem Außendurchmesser des Pumpstengels 3. Damit ist die Konfiguration aus Figur 3 erreicht.The procedure is as follows: Powdered lead borosilicate glass (glass solder) becomes made a moldable glass material with a thermoplastic binder system. This glass material is extruded at about 150 ° C into a strand that is has a profile according to FIG. 2b. From this strand are cut using a diamond circular saw or a hot wire cut individual spacers 4. The Intermediate pieces 4 are plugged onto conventional round tubular pump stems 3. For this purpose, the inner diameter of the opening 5 in each intermediate piece 4 is sufficient Play (e.g. 0.1 mm) compared to the outer diameter of the stem 3. The configuration from FIG. 3 is thus achieved.

    Diese wird bei etwa 460°C in einem Ofen behandelt, wobei sich zunächst der Binder verflüchtigt und das verbleibende Glaspulver gesintert wird. Dabei setzt sich das Zwischenstück 4 auf dem Pumpstengel 3 fest. Die bisherigen Arbeitsschritte können in großer Stückzahl getrennt von dem eigentlichen Lampenzusammenbau durchgeführt werden. Nun wird jeder mit einem Zwischenstück 4 versehene Pumpstengel 3 in eine passende Öffnung 2 eines Rahmens 1 eines Flachstrahlers eingesetzt.This is treated in an oven at around 460 ° C, starting with the binder volatilizes and the remaining glass powder is sintered. This continues Intermediate piece 4 firmly on the pump stem 3. The previous steps can carried out in large numbers separately from the actual lamp assembly become. Now each pump stem 3 provided with an intermediate piece 4 inserted into a suitable opening 2 of a frame 1 of a flat radiator.

    Die Öffnung 2 ist vor dem Zusammenbau des Flachstrahlergehäuses durch Wasserstrahlschneiden aus dem Rahmen ausgeschnitten worden. Danach wurden die in Figur 1 nicht dargestellten Platten des Flachstrahlers mit dem Rahmen über eine Glaslotpaste lose verbunden. Nun wird der Pumpstengel 3 mit dem Zwischenstück 4 in die Öffnung 2 lose eingelegt. Der gesamte Aufbau wird in einen Ofen eingebracht und mit einem an sich konventionellen Fügeschritt bei erhöhter Temperatur behandelt. Dabei verbinden sich die Platten fest mit dem Rahmen 1; gleichzeitig verschmilzt das Zwischenstück 4 in der Öffnung 2 vakuumdicht. Bei diesem Fügeschritt werden der Rahmen 1, die nicht dargestellten Platten und der Pumpstengel 3 nicht wesentlich erweicht. Lediglich das Glaslot zwischen Rahmen 1 und Platten sowie das Zwischenstück 4 verschmelzen Durch die bei dem Fügeschritt relativ niedrige Viskosität des gesinterten Glaslots des Zwischenstücks 4 ergibt sich eine hervorragende vakuumdichte Verschmelzung mit dem Rahmen 1 und dem Pumpstengel 3. Das weitere Verfahren, d. h. das Auspumpen des Lampengehäuses über den Pumpstengel 3 und die nachfolgenden Schritte sind konventionell.The opening 2 is by water jet cutting before assembling the flat radiator housing been cut out of the frame. After that, the figure 1 plates of the flat radiator, not shown, with the frame over a glass solder paste loosely connected. Now the pump stem 3 with the intermediate piece 4 in the opening 2 inserted loosely. The entire structure is placed in an oven and treated with a conventional joining step at elevated temperature. The plates connect firmly to the frame 1; merges at the same time the intermediate piece 4 in the opening 2 vacuum-tight. During this joining step the frame 1, the plates, not shown, and the pump stem 3 are not significantly softened. Only the glass solder between frame 1 and plates and that Intermediate piece 4 merge due to the relatively low viscosity in the joining step the sintered glass solder of the intermediate piece 4 is excellent vacuum-tight fusion with the frame 1 and the pump stem 3. The further processes, d. H. pumping out the lamp housing via the pump stem 3 and the subsequent steps are conventional.

    Eine alternative Ausführungsform ersetzt das Verschmelzen des Zwischenstücks 4 während des Fügeschritts im Ofen sowie auch den Fügeschritt an sich durch eine Bestrahlung mit einem Infrarotlaser, mit dem auch eine vakuumdichte Verbindung zwischen dem Rahmen 1 und den Platten des Flachstrahlers hergestellt wird. Hierzu wird auf die bereits zitierte frühere Anmeldung verwiesen. Die dortigen Ausführungen zum Zusammenbau eines Lampengehäuses und zum Verschließen von Öffnungen mit Hilfe einer Laserbestrahlung bei infrarotabsorbierenden Glasmaterialien gelten in analoger Weise auch für das Zwischenstück 4.An alternative embodiment replaces the fusion of the intermediate piece 4 during the joining step in the furnace as well as the joining step itself by means of a Irradiation with an infrared laser, with which also a vacuum-tight connection is produced between the frame 1 and the plates of the flat radiator. For this reference is made to the earlier application already cited. The explanations there to assemble a lamp housing and to close openings apply with the help of laser radiation to infrared-absorbing glass materials in an analogous manner also for the intermediate piece 4.

    Claims (15)

    1. Method for producing a flat discharge vessel having a frame (1) connecting two housing plates, characterized in that an exhaust tube (3) with a round outer cross section is tightly inserted into an opening (2) in the frame (1) with a square inner cross section, there being inserted between the exhaust tube (3) and the inner wall of the opening (2) a hard adapter (4) which has a continuous opening (5) adapted to the round outer cross section of the exhaust tube (3) and a square outer cross section adapted to the square inner cross section.
    2. Method according to Claim 1, in which the adapter (4) has a lower softening temperature than the exhaust tube (3) and the inner wall, and is softened for the purpose of connecting the exhaust tube (3) to the inner wall, the exhaust tube (3) and the inner wall remaining substantially hard.
    3. Method according to Claim 1 or 2, in which the adapter (4) is mounted on the exhaust tube (3) and connected to it before insertion into the opening.
    4. Method according to one of the preceding claims, in which the frame (1) consists of glass at the site of the opening (2), and the opening (2) is cut into the frame (1) by water jet.
    5. Method according to one of the preceding claims, in which the adapter (4) is injection moulded.
    6. Method according to one of Claims 1-4, in which the adapter (4) is pressed.
    7. Method according to one of Claims 1-4, in which the adapter (4) is produced by extrusion and cutting the adapter (4) to length from an extruded strand.
    8. Method according to one of the preceding claims, in which the adapter (4) consists essentially of glass solder.
    9. Method according to Claim 8, in which the glass solder contains a thermoplastic binder.
    10. Method according to one of the preceding claims, in which the exhaust tube (3) and the opening (2) are tightly connected by fusing on the adapter (4).
    11. Method according to one of the preceding claims in conjunction with Claims 3 and 10, in which the adapter (4) is sintered onto the exhaust tube (3) and then fused on in the opening (2).
    12. Method according to Claim 2 or 10, also in conjunction with a further one of the preceding claims, in which the adapter (4) is heated by laser irradiation.
    13. Method according to Claim 2 or 10, also in conjunction with a further one of the preceding claims, in which the adapter (4) is heated in a furnace during an jointing step of the discharge vessel.
    14. Method according to one of the preceding claims, in which the discharge vessel is part of a gas discharge lamp.
    15. Method according to claim 14, in which the gas discharge lamp is designed for dielectrically impeded discharges.
    EP00958190A 1999-08-05 2000-07-28 Method for inserting a pumping rod in a discharge chamber Expired - Lifetime EP1135788B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19936864A DE19936864A1 (en) 1999-08-05 1999-08-05 Method for inserting a pump stem into a discharge vessel
    DE19936864 1999-08-05
    PCT/DE2000/002499 WO2001011651A1 (en) 1999-08-05 2000-07-28 Method for inserting a pumping rod in a discharge chamber

    Publications (2)

    Publication Number Publication Date
    EP1135788A1 EP1135788A1 (en) 2001-09-26
    EP1135788B1 true EP1135788B1 (en) 2004-09-22

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    Application Number Title Priority Date Filing Date
    EP00958190A Expired - Lifetime EP1135788B1 (en) 1999-08-05 2000-07-28 Method for inserting a pumping rod in a discharge chamber

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    US (1) US6609940B1 (en)
    EP (1) EP1135788B1 (en)
    JP (1) JP2003506845A (en)
    KR (1) KR100393240B1 (en)
    AT (1) ATE277419T1 (en)
    CA (1) CA2346428A1 (en)
    DE (2) DE19936864A1 (en)
    HU (1) HU223851B1 (en)
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    US6939434B2 (en) 2000-08-11 2005-09-06 Applied Materials, Inc. Externally excited torroidal plasma source with magnetic control of ion distribution
    TWI294547B (en) * 2005-10-28 2008-03-11 Delta Electronics Inc Exhaust pipe for a flat lamp

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    US6129603A (en) * 1997-06-24 2000-10-10 Candescent Technologies Corporation Low temperature glass frit sealing for thin computer displays

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    HUP0103855A2 (en) 2002-05-29
    DE50007889D1 (en) 2004-10-28
    KR20010089291A (en) 2001-09-29
    US6609940B1 (en) 2003-08-26
    DE19936864A1 (en) 2001-02-15
    CA2346428A1 (en) 2001-02-15
    HU223851B1 (en) 2005-02-28
    WO2001011651A1 (en) 2001-02-15
    KR100393240B1 (en) 2003-07-31
    JP2003506845A (en) 2003-02-18
    ATE277419T1 (en) 2004-10-15
    EP1135788A1 (en) 2001-09-26

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