EP0851712A2 - Four pour le traitement à haute température - Google Patents

Four pour le traitement à haute température Download PDF

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Publication number
EP0851712A2
EP0851712A2 EP97119140A EP97119140A EP0851712A2 EP 0851712 A2 EP0851712 A2 EP 0851712A2 EP 97119140 A EP97119140 A EP 97119140A EP 97119140 A EP97119140 A EP 97119140A EP 0851712 A2 EP0851712 A2 EP 0851712A2
Authority
EP
European Patent Office
Prior art keywords
microwave
oven
oven according
furnace
waveguide
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
Application number
EP97119140A
Other languages
German (de)
English (en)
Other versions
EP0851712B1 (fr
EP0851712A3 (fr
Inventor
Erfindernennung liegt noch nicht vor Die
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie-Ofenbau Rudolf Brands GmbH
Original Assignee
Industrie-Ofenbau Rudolf Brands GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Industrie-Ofenbau Rudolf Brands GmbH filed Critical Industrie-Ofenbau Rudolf Brands GmbH
Publication of EP0851712A2 publication Critical patent/EP0851712A2/fr
Publication of EP0851712A3 publication Critical patent/EP0851712A3/fr
Application granted granted Critical
Publication of EP0851712B1 publication Critical patent/EP0851712B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/80—Apparatus for specific applications
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/046—Microwave drying of wood, ink, food, ceramic, sintering of ceramic, clothes, hair

Definitions

  • the present invention relates to a furnace for high temperature heat treatment of inorganic materials, in particular ceramic materials, with a furnace housing to hold the material to be treated, a door, a microwave energy generating device and one Device for radiating the microwave energy into the Inside the oven.
  • EP 0 457 948 B1 includes a microwave device one acting as a resonator with several metallic ones Chamber walls formed multi-mode chamber into which a to be heated Workpiece can be used and in the microwave energy is known.
  • the chamber hereby points out at least one movable chamber wall, and there are means which cause the mobile Chamber wall during operation of the microwave device can be set in a repetitive movement. Furthermore are Means for high-frequency sealing of the movable chamber wall opposite the solid chamber walls, so that a change in the movement of the movable chamber wall Resonator volume is given.
  • DE-B 11 86 570 shows a microwave device, which do not have a multimode resonator to accommodate a Has workpiece, but a slot radiator on which a workpiece to be heated is passed.
  • a slot radiator On which a workpiece to be heated is passed.
  • the Slot radiator is the exit opening of a waveguide, into which a magnetron feeds.
  • the present invention is based on the object to create an oven of the type described above with with a simple structure, simple maintenance and safe operation, particularly high temperatures achieve with a homogeneous energy density to let.
  • This object is inventively in a furnace of the beginning described type solved in that the furnace housing a microwave-proof metallic lining and inside of which a built-in microwave permeable Has thermal insulation layer and that the microwave energy radiation device by at least one Microwave slot waveguide is formed, the associated one Opening of the metallic lining comprehensively on the other Outside with the slotted surface facing the inside of the furnace is arranged.
  • the microwave density metallic lining and the microwave energy input via slotted waveguides in the range of Openings of the metallic lining are arranged with simple means achieved that inside the furnace homogeneous energy density distribution is achieved for the High temperature heat treatment of inorganic, in particular ceramic materials, especially the sintering of ceramic Materials, is of particular importance.
  • the in Built-in microwave-permeable interior of the metallic lining thermal insulation layer ensures that inside the furnace with very high temperatures can be worked. So is the trained according to the invention Oven suitable for maximum temperatures up to approximately 1,800 ° C. You can work with air or inert gas inside the furnace will.
  • the solution according to the invention enables the arrangement of a Variety of microwave slot waveguides on all furnace walls, so that the desired homogeneous energy density distribution can be achieved.
  • the thermal insulation layer preferably consists of ceramic fiber materials. It is expediently made up of plates or long fiber modules.
  • a special embodiment of the invention is characterized in that the ceramic material for the insulation layer consists of aluminum oxide (Al 2 O 3 ) which contains mullite, ie an aluminum silicate which consists approximately of 80% aluminum oxide and 20% silicon dioxide. This material has a bulk density of around 300-700 kg / m 3 .
  • Vacuum-formed plates are preferably used, which have a thickness of 40mm.
  • the furnace walls can be covered with a A large number of microwave slot waveguides can be provided.
  • the oven preferably faces at least one wall several parallel to each other and spaced from each other Microwave slot waveguide. Conveniently there are several perpendicular to at least one side wall arranged microwave slot waveguide available.
  • Each furnace wall can have one or more microwave slot waveguides be provided.
  • the microwave slot waveguide arranged on opposite walls are expediently offset from one another arranged. This creates a mutual influence avoided by opposite slotted waveguides.
  • the opening assigned to the microwave slot waveguide the metallic liner is preferably with a dielectric Material closed. This makes it possible Make the interior of the furnace gas-tight.
  • the microwave energy introduction into the microwave slot waveguide takes place in a known manner via a magnetron, which is arranged at one end of the microwave slot waveguide is.
  • the opposite end of the microwave slot waveguide preferably has a short-circuit slide on.
  • the microwave slot waveguide itself can be of a conventional type Be a construction.
  • the slots can be, for example parallel to the longitudinal axis of the waveguide to both Sides of the central axis of the same are arranged offset from one another be.
  • the Slots are arranged at an angle to the longitudinal central axis.
  • the slots are along the central longitudinal axis at a distance and point a small hole adjacent to each.
  • the slots are in a wall of the waveguide, which is approximately rectangular in cross section. It understands yourself that this wall assigned to the inside of the furnace is.
  • the intended thermal insulation layer is included relatively short distance from the microwave slot waveguides arranged so that between the slot surface of the Waveguide or the metallic lining and the outside the thermal insulation layer is only a relatively narrow one Gap remains.
  • the microwave slot waveguide attached to the outside of the metallic lining are that there is a microwave-tight connection.
  • the gas tightness is ensured by the above Layer of dielectric material, preferably quartz glass, achieved that towards the middle of the furnace in front of the slot surface the waveguide is arranged.
  • a chamber furnace 1 In the furnace for high-temperature heat treatment shown in the figures it is about ceramic materials is a chamber furnace 1, the one on its front Door 2 has.
  • the furnace is roughly box-shaped and stands on four legs 3.
  • On its two opposite Side walls 5 are three perpendicular and parallel mutually arranged microwave slot waveguide 7, the waveguide being offset from the opposite sides are arranged to each other.
  • the exact structure of the furnace is based on of Figures 2-5 explained.
  • the chamber furnace 1 shown here is for a maximum temperature of 1,800 ° C and designed for operation in Suitable in air or natural gas.
  • the useful dimensions of the furnace amount to 500x500x500mm, and it comes with a microwave frequency of 2.45 GHz worked.
  • Figure 2 shows that three Microwave slot waveguide 7 parallel to each other in the vertical direction arranged on a side surface 5 of the furnace are. Are on the opposite side surface another three microwave slot waveguides that are offset too the waveguides are arranged on the other side.
  • a short-circuit slide is provided at the end of the waveguide.
  • FIG. 5 shows a horizontal section through the chamber furnace 1 to 4.
  • the furnace has an outer frame 14, which stores the actual furnace housing.
  • the furnace housing has a metallic liner 12 and one inside of this permanently installed thermal insulation layer 11 on, which consists of mullite.
  • the metallic lining is microwave-proof, while the thermal insulation layer 11 is essentially microwave transparent.
  • each of a microwave slot waveguide 7 are included, the outside of the metallic Lining 12 is arranged and with its slot surface points to the inside of the oven. So there are three openings 13 side by side and parallel to each other on each side surface 5 of the oven provided, each of which has a microwave slot waveguide 7 is assigned.
  • the attachment of the Waveguide 7 on the metallic lining 12 is microwave-proof Way is done.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Furnace Details (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP97119140A 1996-12-24 1997-11-03 Four pour le traitement à haute température Expired - Lifetime EP0851712B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654356A DE19654356C2 (de) 1996-12-24 1996-12-24 Ofen zur Hochtemperatur-Wärmebehandlung
DE19654356 1996-12-24

Publications (3)

Publication Number Publication Date
EP0851712A2 true EP0851712A2 (fr) 1998-07-01
EP0851712A3 EP0851712A3 (fr) 1998-09-16
EP0851712B1 EP0851712B1 (fr) 2005-01-26

Family

ID=7816209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119140A Expired - Lifetime EP0851712B1 (fr) 1996-12-24 1997-11-03 Four pour le traitement à haute température

Country Status (3)

Country Link
EP (1) EP0851712B1 (fr)
AT (1) ATE288181T1 (fr)
DE (2) DE19654356C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011513941A (ja) * 2008-03-11 2011-04-28 ビタ ツァーンファブリク ハー．ラウター ゲーエムベーハー ウント コー カーゲー 歯科用焼結炉及びセラミック歯科要素の焼結方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10158507B4 (de) * 2001-11-29 2007-10-18 Thyssenkrupp Gerlach Gmbh Schutzvorrichtung für eine Induktionsspule und Verfahren zu ihrer Herstellung
DE102014208110B4 (de) * 2014-04-29 2016-09-08 Schunk Kohlenstofftechnik Gmbh Ofenauskleidung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1378280A (fr) * 1963-10-04 1964-11-13 Procédé et dispositif d'excitation d'un four de chauffage à ondes d'hyperfréquence
US4541729A (en) * 1982-01-11 1985-09-17 General Motors Corporation Microwave heating control and calorimetric analysis
US4617439A (en) * 1984-10-02 1986-10-14 Valeo Process for heating a substance, for purposes of vulcanization or polymerization
EP0344438A1 (fr) * 1988-05-31 1989-12-06 Bosch-Siemens HausgerÀ¤te GmbH Appareil domestique à micro-ondes
US5420401A (en) * 1993-05-03 1995-05-30 Societe Prolabo Microwave oven, in particular for rapid heating to high temperature
WO1996039791A1 (fr) * 1995-06-03 1996-12-12 Miratron Ag Four a micro-ondes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE345903B (fr) * 1970-12-21 1972-06-12 Philips Svenska Ab
DE3706336C1 (de) * 1987-02-27 1988-04-28 Linn Horst Verfahren und Vorrichtung zur Erzeugung hoher Temperaturen
DE4324635A1 (de) * 1993-07-22 1995-01-26 Abb Patent Gmbh Einrichtung zur Sinterung keramischer Körper mittels Mikrowellen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1378280A (fr) * 1963-10-04 1964-11-13 Procédé et dispositif d'excitation d'un four de chauffage à ondes d'hyperfréquence
US4541729A (en) * 1982-01-11 1985-09-17 General Motors Corporation Microwave heating control and calorimetric analysis
US4617439A (en) * 1984-10-02 1986-10-14 Valeo Process for heating a substance, for purposes of vulcanization or polymerization
EP0344438A1 (fr) * 1988-05-31 1989-12-06 Bosch-Siemens HausgerÀ¤te GmbH Appareil domestique à micro-ondes
US5420401A (en) * 1993-05-03 1995-05-30 Societe Prolabo Microwave oven, in particular for rapid heating to high temperature
WO1996039791A1 (fr) * 1995-06-03 1996-12-12 Miratron Ag Four a micro-ondes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE COMPENDEX ENGINEERING INFORMATION, INC., NEW YORK, NY, US CHUPOV V D ET AL: "Some kinds of products from structural ceramic material of KSTs type on basis of quartz glass" XP002072800 & OGNEUPORY;OGNEUPORY NOV 1997, Nr. 11, November 1997, Seiten 37-38, *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011513941A (ja) * 2008-03-11 2011-04-28 ビタ ツァーンファブリク ハー．ラウター ゲーエムベーハー ウント コー カーゲー 歯科用焼結炉及びセラミック歯科要素の焼結方法

Also Published As

Publication number Publication date
EP0851712B1 (fr) 2005-01-26
DE59712184D1 (de) 2005-03-03
DE19654356C2 (de) 2002-06-13
DE19654356A1 (de) 1998-06-25
ATE288181T1 (de) 2005-02-15
EP0851712A3 (fr) 1998-09-16

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