EP0493276A1 - Résistor pour four à induction - Google Patents

Résistor pour four à induction Download PDF

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Publication number
EP0493276A1
EP0493276A1 EP91420455A EP91420455A EP0493276A1 EP 0493276 A1 EP0493276 A1 EP 0493276A1 EP 91420455 A EP91420455 A EP 91420455A EP 91420455 A EP91420455 A EP 91420455A EP 0493276 A1 EP0493276 A1 EP 0493276A1
Authority
EP
European Patent Office
Prior art keywords
resistor
plates
graphite
prism
entire length
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.)
Withdrawn
Application number
EP91420455A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michel Maubert
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.)
Mersen SA
Original Assignee
Carbone Lorraine SA
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 Carbone Lorraine SA filed Critical Carbone Lorraine SA
Publication of EP0493276A1 publication Critical patent/EP0493276A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor

Definitions

  • the present invention relates to a graphite resistor comprising several elements and intended to equip an induction heated oven.
  • the resistor reacts like the single turn of the secondary of a transformer in which the primary is constituted by the copper solenoid which surrounds the resistor.
  • the said solenoid when supplied with alternating current, the latter gives rise in the resistor to an electric current whose intensity is proportional to that which passes through the primary, which causes by Joule effect a heat emission which is then transmitted to the parts placed inside the resistor.
  • the object of the invention is to avoid the drawbacks mentioned above and in particular to be able to manufacture multi-element graphite resistors whose performance is improved compared to that of the prior art and / or of larger dimensions.
  • the object of the invention is a graphite resistor for an induction furnace, the lateral faces of which are arranged so as to form a straight prism and are constituted by identical plates which are joined together by their ends along a face parallel to the axis of the prism characterized in that for a prism with 2n sides, one has plates, that each of the plates is provided laterally with two identical longitudinal notches opening out respectively on either side of said plate and that the association of said plates results from the partial fitting of one of the notches in the notch of the neighboring element so as to leave between them and over their entire length a polygonal section space occupied by a graphite key of substantially adjacent section and shared over its entire length in two parts connecting along an oblique face.
  • the parts are assembled as described by fitting the notches into each other then, one threads one of the parts of the key in the space which remains free and one blocks the assembly by threading head- spade the other part and forcing it using a sledgehammer.
  • a flexible graphite strip is glued such as that which bears the mark "PAPYEX" so as to perfect the electrical junction between elements.
  • the dimensions of the resistor according to the invention are technologically limited by the dimensions of the standard solid graphite blocks in which the elements are machined. If the diameter can be increased by multiplying the number of elements, on the other hand the height is strictly limited to that of the solid graphite parts.
  • a modular structure can be used, that is to say that several identical prisms or modules are manufactured and the stack on top of each other by placing a strip of PAPYEX between them to obtain a single resistor of the desired height.
  • Each element can be machined in a particular way to provide it with means intended to facilitate its handling and its assembly.
  • FIG 1 there is a plate 1 whose outline corresponds to one side of the resistor bounded by the edges 2 and 3 and is extended by two half faces so as to be able to produce a prism of 2n sides with n plates.
  • This plate is provided with two notches 4 and 5 opening respectively on either side of said plate and is associated with its neighbors by the end faces 6 and 7 of said notches.
  • a hole 8a for handling and a hole 8b for positioning were made.
  • the elements 10 and 11 are marked with their respective end faces 14 and 15 equipped with their seal 16 and 17.
  • the two parts 18 and 19 of the key whose contact faces 20 and 21 extend obliquely over the entire height of the prism.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Furnace Details (AREA)
  • Details Of Resistors (AREA)
  • Furnace Charging Or Discharging (AREA)
EP91420455A 1990-12-21 1991-12-16 Résistor pour four à induction Withdrawn EP0493276A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9016585 1990-12-21
FR9016585A FR2670984A1 (fr) 1990-12-21 1990-12-21 Resistor pour four a induction.

Publications (1)

Publication Number Publication Date
EP0493276A1 true EP0493276A1 (fr) 1992-07-01

Family

ID=9403919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420455A Withdrawn EP0493276A1 (fr) 1990-12-21 1991-12-16 Résistor pour four à induction

Country Status (5)

Country Link
US (1) US5299224A (enrdf_load_stackoverflow)
EP (1) EP0493276A1 (enrdf_load_stackoverflow)
JP (1) JPH04356685A (enrdf_load_stackoverflow)
CA (1) CA2057691A1 (enrdf_load_stackoverflow)
FR (1) FR2670984A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629636A1 (de) * 1996-07-23 1998-01-29 Ald Vacuum Techn Gmbh Tiegel zum induktiven Schmelzen oder Überhitzen von Metallen, Legierungen oder anderen elektrisch leitfähigen Werkstoffen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB392755A (en) * 1931-09-09 1933-05-25 Ugine Infra Improvements in or relating to induction furnaces and other apparatus using the phenomenon of variation of magnetic permeability to regulate or indicate according to temperature
US3210455A (en) * 1960-05-17 1965-10-05 Schwarzkopf Dev Company Induction furnace susceptor enclosure for developing heat by induction current and the method for producing such susceptor enclosures
FR2364590A1 (fr) * 1976-09-10 1978-04-07 Lorraine Carbone Induit de four a induction constitue de plusieurs morceaux assembles
EP0018554A2 (de) * 1979-04-26 1980-11-12 Siemens Aktiengesellschaft Heizeinrichtung zum Vorwärmen von Heizöl

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU57194A1 (enrdf_load_stackoverflow) * 1968-10-30 1970-05-04
US3568611A (en) * 1968-11-12 1971-03-09 Johns Manville Furnace construction
US3775091A (en) * 1969-02-27 1973-11-27 Interior Induction melting of metals in cold, self-lined crucibles
US4411621A (en) * 1980-12-05 1983-10-25 Miller Thomas M Furnace wall construction
US4638617A (en) * 1984-10-19 1987-01-27 Merkle Engineers, Inc. Refractory curtain wall
US4900249A (en) * 1987-01-12 1990-02-13 Dresser Industries, Inc. Aluminum reverberatory furnace lining

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB392755A (en) * 1931-09-09 1933-05-25 Ugine Infra Improvements in or relating to induction furnaces and other apparatus using the phenomenon of variation of magnetic permeability to regulate or indicate according to temperature
US3210455A (en) * 1960-05-17 1965-10-05 Schwarzkopf Dev Company Induction furnace susceptor enclosure for developing heat by induction current and the method for producing such susceptor enclosures
FR2364590A1 (fr) * 1976-09-10 1978-04-07 Lorraine Carbone Induit de four a induction constitue de plusieurs morceaux assembles
EP0018554A2 (de) * 1979-04-26 1980-11-12 Siemens Aktiengesellschaft Heizeinrichtung zum Vorwärmen von Heizöl

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629636A1 (de) * 1996-07-23 1998-01-29 Ald Vacuum Techn Gmbh Tiegel zum induktiven Schmelzen oder Überhitzen von Metallen, Legierungen oder anderen elektrisch leitfähigen Werkstoffen
US5991328A (en) * 1996-07-23 1999-11-23 Ald Vacuum Technologies Gmbh Crucible for the inductive melting or superheating of metals, alloys, or other electrically conductive materials

Also Published As

Publication number Publication date
FR2670984B1 (enrdf_load_stackoverflow) 1993-02-26
US5299224A (en) 1994-03-29
CA2057691A1 (fr) 1992-06-22
JPH04356685A (ja) 1992-12-10
FR2670984A1 (fr) 1992-06-26

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