EP1205724A2 - 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
- EP1205724A2 EP1205724A2 EP01126388A EP01126388A EP1205724A2 EP 1205724 A2 EP1205724 A2 EP 1205724A2 EP 01126388 A EP01126388 A EP 01126388A EP 01126388 A EP01126388 A EP 01126388A EP 1205724 A2 EP1205724 A2 EP 1205724A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity resonator
- compacts
- vacuum chamber
- cavity
- 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.)
- Granted
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
- 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 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 specially adapted for 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 compacts made of composite materials, which hard materials and / or metal powder included, with a vacuum chamber and / or chamber with special Gas atmosphere, with at least one microwave oven in the vacuum chamber, which is a cavity resonator, a microwave source and one Coupling device for coupling the microwave field into the Contains cavity resonator, and with a microwave source for connection the coupling device.
- the object of the invention is therefore to provide a device of the type mentioned to further develop such that a uniform, in particular also fast drying, Heating and / or sintering of such material pressed bodies (sintered bodies) is possible.
- the microwave oven is located in a vacuum chamber and a conveyor for driving on the pellets in the cavity resonator, whereby the pellets - or Sintered body - moved through the locally variable microwave field and all around the same time during the operating time of the furnace Average of the microwave field strength are exposed, so that a uniform Drying or heating of the pressed body is guaranteed. Since the Microwave oven housed in a vacuum chamber needs the Do not close the loading opening of the cavity resonance, moreover, several microwave ovens can be easily combined in one Attach vacuum chamber, which increases the throughput of compacts per unit of time can be increased.
- the conveying device particularly preferably conveys the compacts from the vacuum chamber into the cavity, the compacts then move in the cavity 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 compacts outside the cavity takes place, that is, the microwave oven for insertion and for Removal of the compacts does not have to cool down because the assembly 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 operated, significantly shorten the output to heated or enlarge dried compacts per unit of time considerably.
- the conveyor particularly preferably crosses the cavity resonator in its longitudinal direction through openings that are opposite each other End faces of the cavity resonator are provided.
- the conveyor device particularly preferably has a circulating endless belt on, which revolves around roles outside of the cavity resonator, the upper run of the endless belt is passed through the cavity resonator and the lower run of the endless belt below the cavity runs.
- several microwave ovens can be accommodated in the vacuum chamber are preferably aligned in line in the longitudinal direction and one have common conveyor, which has an endless belt, the is guided through all cavity resonates, with particular preference being given to the Deflection rollers are arranged outside the end cavity resonators, the upper run of the conveyor belt through the cavity resonators runs through and the lower run of the conveyor belt under the Cavity resonators runs back.
- This company has a defined and known field distribution and can also be implemented with high field strengths. Since the compacts are only weakly coupled to the microwave field and therefore high field strengths have to be applied, multimode operation is difficult to master.
- temperature measuring devices are also provided in the cavity resonator, which monitors the surface temperature of the compacts.
- the compacts are preferably placed on graphite carriers 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.
- flow guiding devices are provided in the vacuum chamber and, if appropriate, also in the cavity resonator of the microwave oven, which guide a gas flow through the vacuum chamber and possibly also the cavity resonators.
- 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 resonator 10 which has a rectangular cross section has and has end faces 11 at its two longitudinal ends.
- a Coupling device 12 leads into the cavity resonator 10 and is used for Coupling of a microwave field into the cavity resonator 10.
- a microwave source 14 is electrically connected, which - In the embodiment shown - outside the vacuum chamber 2 is arranged and a microwave field of suitable frequency and strength in the Cavity feeds.
- a conveyor 20 which is an endless belt 22, which with its upper run 23 through the end faces 11 of the cavity resonator 10 is passed and runs around deflection rollers 24, which are outside the cavity, but inside 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 Endless belt 22 can enter and exit the cavity resonator 10.
- the pressed bodies to be heated or dried in the device which from composites, for example tungsten carbide cobalt green compacts, which Containing hard materials and / or metal powder are used in graphite carrier 30, which are placed on the upper run 23 of the endless belt 22 of the conveyor 20 and then from the conveyor through the cavity 10 through and / or in the cavity resonating back and forth with the stroke h and therefore rapid and even drying or heating be subjected.
- composites for example tungsten carbide cobalt green compacts, which Containing hard materials and / or metal powder
- the cavity resonator 10 is preferably, although operated in single mode operation, and in an H 1-one mode. Since this company has a defined and known field distribution and can easily be 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)
Abstract
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 Sintern von Presslingen aus Verbundwerkstoffen, welche Hartstoffe und/oder Metallpulver enthalten, mit einer Vakuumkammer, mit mindestens einem Mikrowellenofen, der einen Hohlraumresonator und eine Einkoppeleinrichtung zum Einkoppeln des Mikrowellenfeldes in den Hohlraumresonator enthält, und mit einer Mikrowellenquelle zum Anschließen an die Einkoppeleinrichtung,
dadurch gekennzeichnet, dass der Mikrowellenofen (10, 12) in der Vakuumkammer (2) angeordnet ist und eine Fördereinrichtung (20) zum Verfahren der Presslinge in dem Hohlraumresonator (10) enthält. - 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 Trumm (23) durch den Hohlraumresonator (10) hindurchgeführt ist, und dass das untere Trumm (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 true EP1205724A2 (de) | 2002-05-15 |
| EP1205724A3 EP1205724A3 (de) | 2003-01-02 |
| EP1205724B1 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020125871A1 (de) * | 2018-12-21 | 2020-06-25 | Gerlach Maschinenbau Gmbh | Vernetzungsvorrichtung mit monomode-applikator |
| IT201900003603A1 (it) * | 2019-03-12 | 2020-09-12 | Surra Renato | Dispositivo e metodo per la ricottura di elementi in rame |
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 |
| 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 |
| CN115804244A (zh) * | 2020-06-17 | 2023-03-14 | 淡水河谷公司 | 利用微波加热物料的装置、利用微波加热物料的方法和利用微波加热物料的系统 |
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 DE DE50106871T patent/DE50106871D1/de not_active Expired - Lifetime
- 2001-11-07 EP EP01126388A patent/EP1205724B1/de not_active Expired - Lifetime
- 2001-11-07 AT AT01126388T patent/ATE300718T1/de active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020125871A1 (de) * | 2018-12-21 | 2020-06-25 | Gerlach Maschinenbau Gmbh | Vernetzungsvorrichtung mit monomode-applikator |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1205724B1 (de) | 2005-07-27 |
| DE50106871D1 (de) | 2005-09-01 |
| EP1205724A3 (de) | 2003-01-02 |
| DE20018925U1 (de) | 2002-03-14 |
| ATE300718T1 (de) | 2005-08-15 |
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