EP1205724B1 - Vorrichtung zum Trocknen und/oder Sintern von Presskörpern aus Verbundwerkstoffen - Google Patents
Vorrichtung zum Trocknen und/oder Sintern von Presskörpern aus Verbundwerkstoffen Download PDFInfo
- Publication number
- EP1205724B1 EP1205724B1 EP01126388A EP01126388A EP1205724B1 EP 1205724 B1 EP1205724 B1 EP 1205724B1 EP 01126388 A EP01126388 A EP 01126388A EP 01126388 A EP01126388 A EP 01126388A EP 1205724 B1 EP1205724 B1 EP 1205724B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity resonator
- vacuum chamber
- transport device
- pressed articles
- microwave
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/243—Endless-strand conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/066—Vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0006—Electric heating elements or system
- F27D2099/0028—Microwave heating
Definitions
- the invention relates to a device for drying and / or sintering of pressed bodies made of composite materials, which hard materials and / or metal powder Contain, with a vacuum chamber and / or chamber with special Gas atmosphere, with at least one microwave oven in the vacuum chamber, a cavity resonator, a microwave source and a Einkoppel founded for coupling the microwave field in the Cavity resonator contains, and with a microwave source for connecting to the coupling device and with a device for conveying the pessaries in the cavity resonator.
- a microwave oven for sintering of sintered material discloses a cavity resonator with a Mikrowelleneinkoppelvorraum which serves for the coupling of microwave fields, the - in resonance mode of the resonator - the volume of the sintered bodies to be processed having.
- additional heat radiation sources which the Compensate for radiation losses via the surface of the sintered material or the material to be sintered heat over the surface. Since sintering processes often take place under vacuum must, appropriate facilities are provided to the interior of the To evacuate resonator.
- the object of the invention is therefore to provide a device of the type mentioned in such a way that a uniform, especially fast drying, Heating and / or sintering of such substance compacts (sintered bodies) is possible.
- This object is according to the invention in the device of the type mentioned solved by the fact that the microwave oven in a vacuum chamber is arranged.
- the microwave oven is in a vacuum chamber, whereby the compacts - or Sintered - moved through the Forder adopted by the locally variable microwave field ohre that they have to pass when entering and leaving the cavity resonator a vacuum-tight lock (the only on the vacuum chamber is required).
- all compacts are about the same time Mean value of the microwave field strength are exposed, so that a uniform Drying or heating of the compact is guaranteed.
- the Microwave oven Since the Microwave oven is housed in a vacuum chamber, the need Do not close the charging opening of the cavity resonator in a vacuum-tight manner, In addition, in a simple manner, several microwave ovens in one Install vacuum chamber, whereby the throughput of pellets per unit time can be increased.
- the conveyor promotes the compacts from the vacuum chamber into the cavity resonator, then moves the compacts in the cavity resonator and then brings the compacts out of the Cavity resonator out.
- This embodiment of the invention has the advantage that the placement and removal of the pellets outside the cavity resonator takes place, so that the microwave oven for insertion and Removal of the compacts does not have to cool, since the Be Publishedung and the Removal outside the microwave oven in the cool area of the vacuum chamber he follows. In this way, the cycle time within which a batch in the Device is processed, significantly shorten the output of heated or Dried compacts per unit of time so significantly increase.
- the conveyor traverses the cavity resonator in its longitudinal direction through openings which are in opposite directions End faces of the cavity are provided.
- the conveyor has a circulating endless belt which revolves around rollers outside the cavity resonator, wherein the upper run of the endless belt is passed through the cavity resonator and the lower run of the endless belt below the cavity resonator runs.
- the conveyor can accommodate several microwave ovens in the vacuum chamber, the are preferably arranged in the longitudinal direction one behind the other in alignment and a have common conveyor, which has an endless belt, the is passed through all cavity resonates, with particular preference the Deflection rollers are arranged outside the end-side cavity resonators, the upper run of the conveyor belt passing through the cavity resonators passes through and the lower run of the conveyor belt under the Cavity resonators runs back.
- the several microwave ovens each provided a separate conveyor.
- This operation has a defined and known field distribution and can also be realized with high field strengths. Since the compacts only weakly couple to the microwave field and thus are to apply high field strengths, a multi-mode operation is difficult to control.
- temperature measuring devices are furthermore provided in the cavity resonator, which monitors the surface temperature of the compacts.
- the pellets are preferably placed on graphite carrier or Al 2 O 3 carriers, which lie on the endless belt of the conveyor.
- tungsten carbide cobalt green compacts or metal compacts can be processed as compacts.
- the drying or heating of the compacts can also take place under protective grass, for example, Ar, N 2 , in the vacuum chamber and possibly also in the cavity of the microwave oven Strömungsleit stylesen are provided which pass a gas flow through the vacuum chamber and optionally also the cavity resonators.
- protective grass for example, Ar, N 2
- FIGs 1 and 2 is a longitudinal section and a cross section through a device 1, which has a vacuum chamber 2, which by means of a door or flap 4 can be opened and closed.
- a cavity 10 which has a rectangular cross-section has and has at its two longitudinal ends end surfaces 11.
- a Injection device 12 leads into the cavity 10 and serves for Coupling of a microwave field in the cavity 10.
- a microwave source 14 is electrically connected, which - In the illustrated embodiment - outside the vacuum chamber. 2 is arranged and a microwave field of suitable frequency and strength in the Cavity resonator feeds.
- a conveyor 20 which is an endless belt 22 has, which with its upper run 23 through the end faces 11th the cavity resonator 10 passes and runs around pulleys 24, located outside the cavity but within the vacuum chamber 2 are located.
- the lower run 25 of the endless belt 22 is outside and below the cavity resonator - in the vacuum chamber 2 - out.
- Locks (not shown), through which the upper run 23 of the Endlosbandes 22 can enter into the cavity 10 and can escape.
- the to be heated or dried in the device compacts which from composites, for example tungsten carbide cobalt green bodies, which Hard materials and / or metal powder are used in graphite carrier 30, placed on the upper run 23 of the endless belt 22 of the conveyor 20 and then from the conveyor through the cavity resonator 10 through and / or in the cavity resonator back and forth with the stroke h moves and thereby a fast and uniform drying or heating be subjected.
- composites for example tungsten carbide cobalt green bodies, which Hard materials and / or metal powder are used in graphite carrier 30, placed on the upper run 23 of the endless belt 22 of the conveyor 20 and then from the conveyor through the cavity resonator 10 through and / or in the cavity resonator back and forth with the stroke h moves and thereby a fast and uniform drying or heating be subjected.
- the cavity resonator 10 is preferably, although operated in single mode operation, and in an H 1-one mode. Since this operation has a defined and known field distribution and can be easily excited with high field strengths.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Press Drives And Press Lines (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
- Fig. 1
- einen schematischen Längsschnitt durch eine erfindungsgemäße Vorrichtung; und
- Fig. 2
- einen Querschnitt längs der Linie II-2 der Figur 1 in vergrößertem Maßstab.
Claims (16)
- Vorrichtung zum Trocknen und/oder Sintem von Presslingen (40) aus Verbundwerkstoffen, welche Hartstoffe und/oder Metallpulver enthalten, mit einer Vakuumkammer (2), mit mindestens einet Mikrowellenofen, der einen Hohlraumresonator (10) und eine Einkoppeleinrichtung (12) zum Einkoppeln des Mikrowellenfeldes in den Hohlraumresonator (10) enthält, und mit einer Mikrowellenquelle (14) zum Anschließen an die Einkoppeleinrichtung (12), sowie mit einer Einrichtung (20) zum Fördern der Presslinge (40) in dem Hohlraumresonator (10),
dadurch gekennzeichnet, dass der Mikrowellenofen (10, 12) in der Vakuumkammer (2) angeordnet ist, - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) die Presslinge von der Vakuumkammer (2) durch eine Öffnung in den Hohlraumresonator (10) transportiert und in Längsrichtung des Hohlraumresonators (10) verfährt. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) den Hohlraumresonator (10) in Längsrichtung durchquert und durch zwei einander gegenüberliegende Stirnflächen (11) des Hohlraumresonators (10) hindurchläuft. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) in dem Hohlraumresonator angeordnet ist, und dass der Hohlraumresonator (10) eine Öffnung zum Beschicken der Fördereinrichtung (20) aufweist. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) ein umlaufendes Endlosband (22) aufweist, welches um Rollen (24) außerhalb des Hohlraumresonators (10) umläuft, und dass das obere Trum (23) durch den Hohlraumresonator (10) hindurchgeführt ist, und dass das untere Trum (25) des Endlosbandes (22) außerhalb des Hohlraumresonators (10) verläuft. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass der Hohlraumresonator (10) im Monomode-Betrieb des Mikrowellenfeldes betreibbar ist. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet, dass der Hohlraumresonator (10) des Mikrowellenofens (10, 12, 14) mit einem Mikrowellenfeld in einer H1on-Mode betrieben wird, mit n = 1, 2, 3... . - Vorrichtung nach einem der vorstehenden Ansprüche,
gekennzeichnet durch Graphitträger (30) oder Al2O3-Träger, die von der Fördereinrichtung (20) befördert werden und die Presslinge aufnehmen. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Presslinge (40) Wolfram Karbid-Kobalt Grünlinge oder Metallpresslinge sind. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) die in den Graphitträgern oder Al2O3-Trägern angeordneten Presslinge mit definiertem Hub in dem Hohlraumresonator (10) gleichmäßig hin und her bewegt. - Vorrichtung nach einem der vorstehenden Ansprüche,
gekennzeichnet durch Temperatur-Meßeinrichtungen im Hohlraumresonator, welche die Oberflächentemperatur der Presslinge überwachen. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass mehrere Mikrowellenöfen (10, 12) in der Vakuumkammer (2) vorgesehen sind, und dass für jeden Mikrowellenofen (10, 12) je eine Fördereinrichtung (20) vorgesehen ist, die die Presslinge in bzw. durch den Hohlraumresonator (10) verfährt. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass mehrere Mikrowellenöfen (10, 12) in der Vakuumkammer (2) mit hintereinander fluchtend angeordneten Hohlraumresonatoren (10) vorgesehen sind, und dass eine gemeinsame Fördereinrichtung, welche ein um Umlenkrollen laufendes Endlosband aufweist, und welches durch alle Hohlraumresonatoren verläuft. - Vorrichtung nach einem der vorstehenden Ansprüche,
gekennzeichnet durch Zuleitungen in die Vakuumkammer zum Zuführen eines Gasgemisches, und Ableitungen aus der Vakuumkammer (2) zum Ableiten des Gasgemisches aus der Vakuumkammer (2). - Vorrichtung nach Anspruch 14,
gekennzeichnet durch Strömungsleiteinrichtungen in der Vakuumkammer und/oder in dem Hohlraumresonator zum Hindurchleiten des Gasstromes durch den/die Hohlraumresonatoren. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Fördereinrichtung (20) die Presslinge vom Außenraum durch mindestens eine Schleuse hindurch in die Vakuumkammer (2) und innerhalb der Vakuumkammer (2) in den Hohlraumresonator (10) fördert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20018925U DE20018925U1 (de) | 2000-11-07 | 2000-11-07 | Vorrichtung zum Trocknen von Presskörpern aus Verbundwerkstoffen |
DE20018925U | 2000-11-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1205724A2 EP1205724A2 (de) | 2002-05-15 |
EP1205724A3 EP1205724A3 (de) | 2003-01-02 |
EP1205724B1 true EP1205724B1 (de) | 2005-07-27 |
Family
ID=7948524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01126388A Expired - Lifetime EP1205724B1 (de) | 2000-11-07 | 2001-11-07 | Vorrichtung zum Trocknen und/oder Sintern von Presskörpern aus Verbundwerkstoffen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1205724B1 (de) |
AT (1) | ATE300718T1 (de) |
DE (2) | DE20018925U1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019106261A1 (de) | 2018-10-23 | 2020-04-23 | Püschner Gmbh & Co. Kg | Verfahren und anlage, insbesondere in modulbauweise, zur, vorzugsweise kontinuierlichen, mikrowellen-gefriertrockung von pharmazeutischen wirkstoffen und, insbesondere essbaren, schäumen, extrakten, konzentraten und pürees auf fruchtbasis in vials und trays |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005049533B3 (de) * | 2005-10-17 | 2007-01-25 | Püschner Gmbh & Co. Kg | Mikrowellen-Durchlaufofen |
DE102015111555B3 (de) * | 2015-07-16 | 2016-09-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Anordnung zur Behandlung von Materialien mit Mikrowellen |
CN113196874A (zh) * | 2018-12-21 | 2021-07-30 | 德国爱德华洁兰赫公司 | 具有单模施加器的交联设备 |
IT201900003603A1 (it) * | 2019-03-12 | 2020-09-12 | Surra Renato | Dispositivo e metodo per la ricottura di elementi in rame |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4038273A1 (de) * | 1990-11-30 | 1992-06-04 | Mls Gmbh | Vorrichtung zum ausloesen und/oder foerdern chemischer und/oder physikalischer prozesse |
DE19640898C2 (de) * | 1996-10-04 | 1998-10-29 | Pueschner Gmbh & Co Kg | Mikrowellen-Sinterofen |
JP3903448B2 (ja) * | 1998-03-13 | 2007-04-11 | Dowaホールディングス株式会社 | 熱処理炉 |
-
2000
- 2000-11-07 DE DE20018925U patent/DE20018925U1/de not_active Expired - Lifetime
-
2001
- 2001-11-07 EP EP01126388A patent/EP1205724B1/de not_active Expired - Lifetime
- 2001-11-07 AT AT01126388T patent/ATE300718T1/de active
- 2001-11-07 DE DE50106871T patent/DE50106871D1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019106261A1 (de) | 2018-10-23 | 2020-04-23 | Püschner Gmbh & Co. Kg | Verfahren und anlage, insbesondere in modulbauweise, zur, vorzugsweise kontinuierlichen, mikrowellen-gefriertrockung von pharmazeutischen wirkstoffen und, insbesondere essbaren, schäumen, extrakten, konzentraten und pürees auf fruchtbasis in vials und trays |
DE102019106261B4 (de) * | 2018-10-23 | 2020-12-10 | Püschner Gmbh & Co. Kg | Verfahren und anlage, insbesondere in modulbauweise, zur, vorzugsweise kontinuierlichen, mikrowellen-gefriertrockung von pharmazeutischen wirkstoffen und, insbesondere essbaren, schäumen, extrakten, konzentraten und pürees auf fruchtbasis in vials und trays |
Also Published As
Publication number | Publication date |
---|---|
ATE300718T1 (de) | 2005-08-15 |
EP1205724A2 (de) | 2002-05-15 |
DE50106871D1 (de) | 2005-09-01 |
DE20018925U1 (de) | 2002-03-14 |
EP1205724A3 (de) | 2003-01-02 |
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