EP1135788A1 - Method for inserting a pumping rod in a discharge chamber - Google Patents
Method for inserting a pumping rod in a discharge chamberInfo
- Publication number
- EP1135788A1 EP1135788A1 EP00958190A EP00958190A EP1135788A1 EP 1135788 A1 EP1135788 A1 EP 1135788A1 EP 00958190 A EP00958190 A EP 00958190A EP 00958190 A EP00958190 A EP 00958190A EP 1135788 A1 EP1135788 A1 EP 1135788A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate piece
- opening
- pump stem
- frame
- section
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005086 pumping Methods 0.000 title abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims description 16
- 229910000679 solder Inorganic materials 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 7
- 238000005304 joining Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—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 is conventionally inserted into an opening in the lamp housing, the remaining space having to be filled with glass solder as the sealing material. For this purpose, it is possibly brushed and dried several times in pasty form.
- the invention is therefore based on the technical problem of specifying a method for producing a discharge vessel which is improved with regard to the insertion of a pump stem.
- a method for producing a flat discharge vessel with a frame connecting two housing plates in which a pump tube is inserted into an opening in the frame with an angular cross section of the drain.
- gel with a round outer cross-section is inserted tightly, a fixed intermediate piece being inserted between the pump stem and the inner wall of the opening, which has a through opening adapted to the round outer cross-section of the pump stem and an angular outer cross-section 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 most reliable connections between the pump stems and the discharge vessel can be established if an additional part which is conventionally not necessary is used.
- This is the intermediate piece according to the invention, which, by virtue of its physical configuration, creates a shape adaptation between the pump stem outer cross section and the inner opening cross section. This allows a free choice of the shape of the stem and the shape of the opening in the lamp housing of the flat radiator.
- pump stems with a round outer cross section can be used, which, for example as simple glass tubes, are not only easy to manufacture and handle, but also show the least difficulties with regard to thermal stresses during the manufacturing process.
- an angular opening can be used in the discharge vessel. In many cases, such a square opening is much easier to make than a round opening.
- a square opening can easily be made in the frame of a flat discharge vessel, for example by simply cutting out or cutting out a piece of the frame completely, so that the opening is delimited on two sides by the plates of the lamp housing of the flat spotlight.
- 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 intermediate piece and the pump stem or opening inner wall and the intermediate piece is either improved to such an extent that a thin glass solder layer is sufficient for a tight connection, or by a shape adjustment of the adapter when inserting.
- the intermediate piece must at least be softened in order to take on the required shape for fitting into the opening and / or on the pump stem.
- the relevant part of the discharge vessel and the pump stem are made of glass. Then it makes sense to choose a glass material for the intermediate piece.
- the term glass material also includes so-called glass ceramics. In the event of a shape adjustment when inserting, a material that can be thermally softened should be selected.
- the intermediate piece is to be optimally adapted by a shape adjustment during insertion, a softening is necessary, as already mentioned.
- a material is selected for the intermediate piece whose softening temperature (which means melting point in the case of selective solid-liquid transitions) is lower than the corresponding temperature of the material of the pump stem and the relevant part of the discharge vessel, that is to say the inner wall.
- a heating of the intermediate piece can be achieved by heating without a substantial softening of the pump stem or the inner wall.
- These can then be assembled as solid components via the space-adapting intermediate piece. It is preferred, but not necessary, that the softening of the Intermediate piece for a tight connection that ensures that the surfaces that collide when they are finally joined together. This applies in particular to glass materials.
- a preferred application for the method according to the invention are discharge lamps, in particular those which are designed for dielectrically impeded discharges, that is to say have at least one electrode which is separated from the discharge volume by a dielectric layer.
- Such discharge lamps are also referred to as silent discharge lamps.
- silent discharge lamps For example referred to the previous German patent application 197 11 890.9 by the same applicant, the disclosure content of which with respect to the lamp technology of silent flat radiators is included here by reference.
- the opening in the frame can be created, for example, by the fact that the length of a glass strand used for the frame is not quite sufficient for the circumference of the shape to be formed by the frame, that is, the width of the opening is too short.
- an opening can also be subsequently cut into an originally essentially closed frame, preferably by water jet cutting or also by sawing.
- essentially flat cut surfaces are created, so that, together with the boundaries through the plates of the discharge vessel, there is a rectangular inner cross section of the opening.
- the required intermediate piece can be manufactured inexpensively and easily in various ways. Injection molding, pressing or extrusion, in particular of glass materials (glass or glass solder) are possible. Strand shapes can also be produced, which then have to be cut to length. This applies in particular to extrusion. Binder-free glass solder powder can also be used for pressing.
- a glass solder is used for the intermediate piece, which is mixed with a thermoplastic binder material.
- the thermoplastic binder material is used to shape the glass solder at relatively low temperatures and can be baked at higher temperatures in a later step. This means that the mixture of glass solder and binder can be softened to a rather viscous state during the production of an extrusion strand or a finished intermediate piece and then the glass solder itself can be melted in the actual sense to produce a seal between the pump stem and the discharge vessel , so it becomes liquid-like.
- the glass solder is designed so that the intermediate piece production using the thermoplastic properties of the binder, for example by extrusion and cutting to length. B. at 130 ° C-180 ° C, then the intermediate piece is plugged onto the pump stem and debindered and sintered through a temperature step at, for example, 430-490 ° C and finally when the entire discharge vessel is joined at the joining temperature, a fusion of the intermediate piece in the Opening takes place
- a laser can also be used for the various temperature steps, for example for local heating of the intermediate element inserted into the opening. Piece. This avoids large-volume heating of the discharge vessel, which can be advantageous for various reasons.
- light sources or heat sources can of course also be used, for example infrared radiators, ovens or flames.
- FIG. 1 shows a pump stem provided with an intermediate piece according to the invention before insertion into an opening in a flat radiator frame
- FIGs 2a and 2b are side and elevation views of the adapter of Figure 1;
- Figure 3 is a side view of the pump stem with the intermediate piece attached.
- FIG. 1 schematically illustrates the method according to the invention with a glass frame 1 of a silent flat radiator, which is otherwise not shown in more detail.
- the glass frame 1 has an opening 2 in the form of a gap delimited by essentially flat side surfaces in the glass strand forming a side edge of the frame 1.
- the inside of the discharge vessel corresponds to the upper right side of the figure.
- a pump stem 3 is shown with a tubular basic shape.
- An intermediate piece 4 according to the invention is placed on a front end of the pump stem 3, which accordingly has a through opening 5 with an inner cross section corresponding to the pump stem 3.
- the intermediate piece 4 corresponds to a certain extent to the piece missing from the frame 1 in the opening 2.
- the outer cross section (in the longitudinal direction of the pump stem or in the insertion direction) of the intermediate piece 4 is adapted to the shape and dimensions of the opening 2, in this case to the rectangular cross-sectional shape of the missing frame piece of 6.5 mm x 6.5 mm with a clearance of 0.2 mm each.
- FIGS. 2a and 2b show the intermediate piece 4 enlarged, a side view seen transversely to the longitudinal direction of the pump stem 3 being shown in the left half in FIG. 2a, and an elevation view being seen in the longitudinal direction of the pump stem 3 being shown in the right half in FIG. 2b.
- the cylindrical continuous opening 5 which can be seen in cross-section on the right-hand side, is indicated by dashed lines.
- the opening 5 has an inner diameter of 5 mm, indicated by the double arrow, which corresponds to the outer diameter of the stem 3 with a play of 0.1 mm.
- Typical dimensions for the opening cross section 2 are generally in the range of a few mm per edge. It should be noted that the intermediate piece 4 shrinks in the sintering step, that is to say that a correspondingly larger dimension must be observed in the extrusion of the strand compared to the dimension of the opening 2 and the pump stem 3.
- FIG. 3 shows the pump stem 3 in a lateral representation, the intermediate piece 4 from FIG. 2 being placed on the front end on the left in FIG. 3.
- a moldable glass material is made from powdered lead borosilicate glass (glass solder) using a thermoplastic binder system. This glass material is extruded at about 150 ° C. to give a strand that has a profile according to FIG. 2b.
- Individual intermediate pieces 4 are cut to length from this strand using a diamond circular saw or a hot wire.
- the Intermediate pieces 4 are plugged onto customary round tubular pump stems 3.
- the inner diameter of the opening 5 in each intermediate piece 4 has sufficient play (for example 0.1 mm) with respect to the outer diameter of the pump stem 3. The configuration from FIG. 3 is thus achieved.
- each pump stem 3 provided with an intermediate piece 4 is inserted into a suitable opening 2 of a frame 1 of a flat radiator.
- the opening 2 has been cut out of the frame by water jet cutting before the flat radiator housing is assembled.
- the plates of the flat radiator (not shown in FIG. 1) were then loosely connected to the frame using a glass solder paste.
- the pump stem 3 with the intermediate piece 4 is loosely inserted into the opening 2.
- the entire assembly is placed in an oven and treated with a conventional joining step at elevated temperature.
- the plates connect firmly to the frame 1; at the same time, the intermediate piece 4 melts in a vacuum-tight manner in the opening 2.
- the frame 1, the plates (not shown) and the pump stem 3 are not significantly softened. Merge only the glass solder between the frame 1 and the plates and the intermediate piece 4.
- An alternative embodiment replaces the melting of the intermediate piece 4 during the joining step in the furnace and also the joining step itself by irradiation with an infrared laser, with which a vacuum-tight connection is also established between the frame 1 and the plates of the flat radiator.
- an infrared laser with which a vacuum-tight connection is also established between the frame 1 and the plates of the flat radiator.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
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 true EP1135788A1 (en) | 2001-09-26 |
| EP1135788B1 EP1135788B1 (en) | 2004-09-22 |
Family
ID=7917256
Family Applications (1)
| 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 |
Country Status (10)
| Country | Link |
|---|---|
| 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) |
| TW (1) | TW480544B (en) |
| WO (1) | WO2001011651A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6939434B2 (en) | 2000-08-11 | 2005-09-06 | Applied Materials, Inc. | Externally excited torroidal plasma source with magnetic control of ion distribution |
| US7037813B2 (en) | 2000-08-11 | 2006-05-02 | Applied Materials, Inc. | Plasma immersion ion implantation process using a capacitively coupled plasma source having low dissociation and low minimum plasma voltage |
| US7303982B2 (en) | 2000-08-11 | 2007-12-04 | Applied Materials, Inc. | Plasma immersion ion implantation process using an inductively coupled plasma source having low dissociation and low minimum plasma voltage |
| TWI294547B (en) * | 2005-10-28 | 2008-03-11 | Delta Electronics Inc | Exhaust pipe for a flat lamp |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2671291A (en) * | 1950-06-29 | 1954-03-09 | Rca Corp | Glassworking apparatus and method |
| US2817927A (en) * | 1956-03-16 | 1957-12-31 | Sylvania Electric Prod | Process for making stems |
| US3778127A (en) * | 1971-12-30 | 1973-12-11 | Ibm | Sealing technique for gas panel |
| US4205258A (en) * | 1979-03-21 | 1980-05-27 | Westinghouse Electric Corp. | Internal shorting fuse for a high-intensity discharge lamp |
| US4414489A (en) * | 1981-11-04 | 1983-11-08 | North American Philips Electric Corp. | Compact electric discharge lamp-and-ballast unit, and plug-in ballast module therefor |
| US4512488A (en) * | 1982-05-27 | 1985-04-23 | The United States Of America As Represented By The Secretary Of The Army | Sealing tubulation and method |
| FR2607624B1 (en) * | 1986-11-28 | 1989-02-10 | Videocolor | METHOD FOR MANUFACTURING BASES FOR VACUUM TUBES |
| US5066257A (en) * | 1990-02-09 | 1991-11-19 | Farner Peter W | Process for producing flat plate illumination devices |
| US5471110A (en) * | 1991-12-23 | 1995-11-28 | Philips Electronics North America Corporation | High pressure discharge lamp having filament electrodes |
| JP3336342B2 (en) * | 1993-07-22 | 2002-10-21 | 岩崎電気株式会社 | Manufacturing method of metal halide lamp |
| FR2716572B1 (en) * | 1994-02-22 | 1996-05-24 | Pixel Int Sa | Short shank for flat display screens, especially microtips. |
| CN1083148C (en) * | 1994-12-20 | 2002-04-17 | 皇家菲利浦电子有限公司 | Low-pressure mercury vapour discharge lamp |
| JPH08236024A (en) * | 1995-02-28 | 1996-09-13 | Iwaki Glass Kk | Glass-made bulb and glass-made exhaust pipe |
| JP3150874B2 (en) | 1995-04-14 | 2001-03-26 | スタンレー電気株式会社 | Flat fluorescent lamp and method of manufacturing the same |
| TW344084B (en) * | 1995-05-24 | 1998-11-01 | Philips Eloctronics N V | Lighting unit, electrodeless low-pressure discharge lamp, and discharge vessel for use in the lighting unit |
| GB9521373D0 (en) * | 1995-10-18 | 1995-12-20 | Gen Electric | Electrodeless fluorescent lamp |
| DE19711892A1 (en) * | 1997-03-21 | 1998-09-24 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Flat radiator |
| US6129603A (en) * | 1997-06-24 | 2000-10-10 | Candescent Technologies Corporation | Low temperature glass frit sealing for thin computer displays |
-
1999
- 1999-08-05 DE DE19936864A patent/DE19936864A1/en not_active Withdrawn
-
2000
- 2000-07-28 EP EP00958190A patent/EP1135788B1/en not_active Expired - Lifetime
- 2000-07-28 DE DE50007889T patent/DE50007889D1/en not_active Expired - Fee Related
- 2000-07-28 KR KR10-2001-7004330A patent/KR100393240B1/en not_active Expired - Fee Related
- 2000-07-28 AT AT00958190T patent/ATE277419T1/en not_active IP Right Cessation
- 2000-07-28 WO PCT/DE2000/002499 patent/WO2001011651A1/en not_active Ceased
- 2000-07-28 HU HU0103855A patent/HU223851B1/en not_active IP Right Cessation
- 2000-07-28 CA CA002346428A patent/CA2346428A1/en not_active Abandoned
- 2000-07-28 US US09/806,762 patent/US6609940B1/en not_active Expired - Fee Related
- 2000-07-28 JP JP2001516214A patent/JP2003506845A/en active Pending
- 2000-08-01 TW TW089115398A patent/TW480544B/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0111651A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US6609940B1 (en) | 2003-08-26 |
| HU223851B1 (en) | 2005-02-28 |
| DE50007889D1 (en) | 2004-10-28 |
| HUP0103855A2 (en) | 2002-05-29 |
| KR20010089291A (en) | 2001-09-29 |
| CA2346428A1 (en) | 2001-02-15 |
| JP2003506845A (en) | 2003-02-18 |
| KR100393240B1 (en) | 2003-07-31 |
| EP1135788B1 (en) | 2004-09-22 |
| ATE277419T1 (en) | 2004-10-15 |
| DE19936864A1 (en) | 2001-02-15 |
| TW480544B (en) | 2002-03-21 |
| WO2001011651A1 (en) | 2001-02-15 |
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