US3705284A - Inductor for the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles - Google Patents

Inductor for the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles Download PDF

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Publication number
US3705284A
US3705284A US13434A US3705284DA US3705284A US 3705284 A US3705284 A US 3705284A US 13434 A US13434 A US 13434A US 3705284D A US3705284D A US 3705284DA US 3705284 A US3705284 A US 3705284A
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US
United States
Prior art keywords
inductor
half molds
edges
electrically conductive
transformer
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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
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US13434A
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English (en)
Inventor
Pierre Binard
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Elphiac SA
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Elphiac SA
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/06—Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
    • 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
    • H05B6/36—Coil arrangements
    • H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces

Definitions

  • the inductor forms, in combination with the insulation between its conductors, a mold in which the material containing ferromagnetic or electrically conductive particles is submitted to the thermal treatment.
  • the invention relates to an inductor for'use in the thermal treatment of a material which is not very or non-electrically conductive containing ferromagnetic or electrically conductive particles.
  • the object of the invention is to provide an inductor for use with such a known process, wherein the thermal treatment of the material containing ferromagnetic or electrically conductive particles is carried out in'a receptacle such as a mold, the chamber of a screw type pump, a dye etc. v
  • the inductor in accordancewith the invention, is characterized in that it forms, in combination with the insulation between its conductors, the mold in which the material containing ferromagnetic or electrically conductive particles is submitted to the thermal treatment.
  • FIGS. 1 and 2 illustrate similar arrangements of a first inductor in accordance with the invention.
  • FIG. 3 illustrates a second embodiment of aninductor in accordance with the invention.
  • FIG. 1 there is shown two half molds l and 2 which are electrically conductive and made of, for example, cast aluminum.
  • the half molds have roughly the shape of a hollow torus separated in two through its plane of symmetry perpendicular to the axis 3 thereof.
  • the two half molds are not necessarily perfectly 'symmetricaL'An insulating ring 4is positioned between the two inside mating edges of the half molds 1 and 2 and provides an electrical insulation between the current feeding conductors.
  • the ring 4 includes an opening therein through which may petrude a pipette (not shown) for permitting to build up a pressure the two half molds once assembled.
  • the insulating ring 4 may be made of an elastomer which is resistant to high temperatures.
  • the outside mating edges of the two half molds l and 2 include means to ensure a good electrical contact between such edges such as, for example, a small projection 5 on the half mold 2 along the inside circumference thereof.
  • the contact surface of projection 5 and the opposite contact surface of the half mold l are coated with a thin layer of a material the conducting properties of which are not impaired by sulphur such as, for example, gold.
  • contact springs 6 located at equal distances along the inside circumference of the outside edge of one of the two half molds such as, for example, the half mold 2 as illustrated in FIG. 2.
  • These contact springs 6 may be made of bronze and may bear on a copper band 7 inserted into the other half mold l.
  • the two half molds l and 2 are connected at their inside edges to two high frequency current feeding conductors 8 and 9. These conductors may consist of two sleeves providing a uniform electrical contact along the inside edge of each half mold or may consist of a number of contact fingers equally spaced along the inside edges of the half molds.
  • the high frequency current is generated, preferably, by a transformer 10 located adjacent to the torus.
  • the transformer 10 is a toroidal transformer comprising an inside primary winding made of a number of turns of conductors and an outside secondary winding 12 consisting of a torus cut along two parallel circles and welded at the location of such cut to the two sleeves 8 and 9.
  • the sleeve 9 may be permanently connected to half mold 2 by means of screws, for example, protruding through a flange 13 of the sleeve, while the edge of the other sleeve 8, which is to contact the half mold 1, may be slit so as to form a number of contact fingers 14 which are applied against the half'mold 1 by means of :1 conical piston 15 operated by a pneumatic device 16.
  • shaped pieces made of an electrically non-conducting material which is'also heat resistant.
  • Such pieces may be made, for example, of a material known under the trade mark Araldite containing quartz and resistant to at least C. It is also possible to make such pieces of a thermosetting material containing a ferromagnetic or electrically conductive powder. In addition, these pieces may be reinforced by glass fibers or by textiles of the same material.
  • FIG. 3 there is shown an alternative embodiment of the invention.
  • a spiral inductor having a solid conductor 17 is surrounded by a layer of an insulating material 18 such as, for example, polytetrafluorethylene known under the trade mark Teflon.
  • the insulating material 18 fully surrounds the conductor 17 and has an inside surface which is suitable for a mold.
  • the assembly of the inductor and of the insulating material is supported by a reinforcing outside tube 19 made of, for example, porcelain.
  • Such tube 19 may be replaced by the jaws of a clamping tool since the use thereof is to prevent inductor 17 from opening up when a pressure is established inside the mold. When the pressure is nil or very low, outside clamping means such as tube 19 are not necessary.
  • a lower piston 20 and an upper piston 21 are provided.
  • These pistons may be made, preferably, of a material which is electrically and thermally insulating. However, it is also possible to provide pistons which are electrically conducting or having sufficient magnetization losses to produce about the same amount of heating than that produced in the material to be treated.
  • a conductor 17 which is 1 hollow so as to permit circulation of water or vapor inside the conductor, in order to always maintain the conductor at a predetermined temperature which may be chosen to be about equal to that of the material undergoing a thermal treatment inside the inductor.
  • thermosetting material is Araldite which is resistant to at least 150C.
  • said high frequency current source comprises a transformer having a primary winding and a secondary winding located adjacent to the torus formed by said half molds, and wherein the current conductors connected to the inside edges of said half molds are the ends of the secondary winding of said transformer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • General Induction Heating (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Soft Magnetic Materials (AREA)
US13434A 1969-02-27 1970-02-24 Inductor for the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles Expired - Lifetime US3705284A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE729001A BE729001A (fr) 1969-02-27 1969-02-27 Inducteur
BE82862 1969-12-17

Publications (1)

Publication Number Publication Date
US3705284A true US3705284A (en) 1972-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13434A Expired - Lifetime US3705284A (en) 1969-02-27 1970-02-24 Inductor for the thermal treatment of a material which is not very or non-electrically conducting containing ferromagnetic or electrically conductive particles

Country Status (6)

Country Link
US (1) US3705284A (fr)
BE (2) BE729001A (fr)
CA (1) CA916244A (fr)
DE (1) DE2009015A1 (fr)
FR (1) FR2032466A1 (fr)
GB (1) GB1300247A (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571472A (en) * 1984-01-24 1986-02-18 Ab Akerlund & Rausing Device for induction welding
US4749833A (en) * 1987-08-07 1988-06-07 Tocco, Inc. Induction heating for adhesive bonding
US5530227A (en) * 1991-04-05 1996-06-25 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5571436A (en) * 1991-10-15 1996-11-05 The Boeing Company Induction heating of composite materials
US5591369A (en) * 1991-04-05 1997-01-07 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5599472A (en) * 1991-04-05 1997-02-04 The Boeing Company Resealable retort for induction processing of organic matrix composites or metals
US5624594A (en) * 1991-04-05 1997-04-29 The Boeing Company Fixed coil induction heater for thermoplastic welding
US5641422A (en) * 1991-04-05 1997-06-24 The Boeing Company Thermoplastic welding of organic resin composites using a fixed coil induction heater
US5645744A (en) * 1991-04-05 1997-07-08 The Boeing Company Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5683607A (en) * 1991-10-15 1997-11-04 The Boeing Company β-annealing of titanium alloys
US5705794A (en) * 1991-10-15 1998-01-06 The Boeing Company Combined heating cycles to improve efficiency in inductive heating operations
US5710414A (en) * 1991-04-05 1998-01-20 The Boeing Company Internal tooling for induction heating
US5728309A (en) * 1991-04-05 1998-03-17 The Boeing Company Method for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5808281A (en) * 1991-04-05 1998-09-15 The Boeing Company Multilayer susceptors for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5847375A (en) * 1991-04-05 1998-12-08 The Boeing Company Fastenerless bonder wingbox
US5895854A (en) * 1996-11-08 1999-04-20 Continental Aktiengesellschaft Vehicle wheel provided with a pneumatic tire having therein a rubber mixture permeated with magnetizable particles
US6308758B1 (en) 1999-07-06 2001-10-30 Continental Ag Elastomeric tire having magnetized sidewall and method of manufacturing same
US6660122B1 (en) 1998-09-04 2003-12-09 The Goodyear Tire & Rubber Company Induction curable tire components and methods of selectively curing such components

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2637084A (en) * 1983-07-28 1985-01-31 Bixby International Corp. Shoe stiffener
US5087804A (en) * 1990-12-28 1992-02-11 Metcal, Inc. Self-regulating heater with integral induction coil and method of manufacture thereof
FR2944225A1 (fr) * 2009-04-09 2010-10-15 Jean Luc Mossotti Presse chauffante a induction

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380250A (en) * 1919-10-22 1921-05-31 Martin H Reymond Process of molding or shaping parts in molds or dies
US2014332A (en) * 1934-10-29 1935-09-10 Pharis Tire And Rubber Company Apparatus for vulcanizing rubber
US2372929A (en) * 1941-04-01 1945-04-03 Rca Corp Composite structure
US2393541A (en) * 1943-05-21 1946-01-22 Induction Heating Corp Composition adapted for inductive heating and method for using same
US2438952A (en) * 1944-04-20 1948-04-06 Gen Tire & Rubber Co Method for curing pneumatic tires
US2581939A (en) * 1947-07-05 1952-01-08 Firestone Tire & Rubber Co Mold for electronic vulcanization
US2611152A (en) * 1951-12-01 1952-09-23 Goodrich Co B F Vulcanization of tires with highfrequency fields and apparatus therefor
US2738406A (en) * 1951-09-20 1956-03-13 Gen Precision Lab Inc Radio frequency vulcanizing
US2875556A (en) * 1953-07-31 1959-03-03 Vig Corp Apparatus for molding refractory materials
US3126937A (en) * 1962-02-15 1964-03-31 Gen Dynamics Corp Forming method and apparatus therefor
US3391846A (en) * 1963-08-08 1968-07-09 Du Pont Heating with antiferromagnetic particles in a high frequency magnetic field

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1380250A (en) * 1919-10-22 1921-05-31 Martin H Reymond Process of molding or shaping parts in molds or dies
US2014332A (en) * 1934-10-29 1935-09-10 Pharis Tire And Rubber Company Apparatus for vulcanizing rubber
US2372929A (en) * 1941-04-01 1945-04-03 Rca Corp Composite structure
US2393541A (en) * 1943-05-21 1946-01-22 Induction Heating Corp Composition adapted for inductive heating and method for using same
US2438952A (en) * 1944-04-20 1948-04-06 Gen Tire & Rubber Co Method for curing pneumatic tires
US2581939A (en) * 1947-07-05 1952-01-08 Firestone Tire & Rubber Co Mold for electronic vulcanization
US2738406A (en) * 1951-09-20 1956-03-13 Gen Precision Lab Inc Radio frequency vulcanizing
US2611152A (en) * 1951-12-01 1952-09-23 Goodrich Co B F Vulcanization of tires with highfrequency fields and apparatus therefor
US2875556A (en) * 1953-07-31 1959-03-03 Vig Corp Apparatus for molding refractory materials
US3126937A (en) * 1962-02-15 1964-03-31 Gen Dynamics Corp Forming method and apparatus therefor
US3391846A (en) * 1963-08-08 1968-07-09 Du Pont Heating with antiferromagnetic particles in a high frequency magnetic field

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571472A (en) * 1984-01-24 1986-02-18 Ab Akerlund & Rausing Device for induction welding
US4749833A (en) * 1987-08-07 1988-06-07 Tocco, Inc. Induction heating for adhesive bonding
US5591369A (en) * 1991-04-05 1997-01-07 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5645744A (en) * 1991-04-05 1997-07-08 The Boeing Company Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5808281A (en) * 1991-04-05 1998-09-15 The Boeing Company Multilayer susceptors for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5591370A (en) * 1991-04-05 1997-01-07 The Boeing Company System for consolidating organic matrix composites using induction heating
US5599472A (en) * 1991-04-05 1997-02-04 The Boeing Company Resealable retort for induction processing of organic matrix composites or metals
US5624594A (en) * 1991-04-05 1997-04-29 The Boeing Company Fixed coil induction heater for thermoplastic welding
US5641422A (en) * 1991-04-05 1997-06-24 The Boeing Company Thermoplastic welding of organic resin composites using a fixed coil induction heater
US7126096B1 (en) 1991-04-05 2006-10-24 Th Boeing Company Resistance welding of thermoplastics in aerospace structure
US5683608A (en) * 1991-04-05 1997-11-04 The Boeing Company Ceramic die for induction heating work cells
US6211497B1 (en) 1991-04-05 2001-04-03 The Boeing Company Induction consolidation system
US5530227A (en) * 1991-04-05 1996-06-25 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5847375A (en) * 1991-04-05 1998-12-08 The Boeing Company Fastenerless bonder wingbox
US5710414A (en) * 1991-04-05 1998-01-20 The Boeing Company Internal tooling for induction heating
US5728309A (en) * 1991-04-05 1998-03-17 The Boeing Company Method for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5747179A (en) * 1991-04-05 1998-05-05 The Boeing Company Pack for inductively consolidating an organic matrix composite
US5700995A (en) * 1991-10-15 1997-12-23 The Boeing Company Superplastically formed part
US5821506A (en) * 1991-10-15 1998-10-13 The Boeing Company Superplastically formed part
US5705794A (en) * 1991-10-15 1998-01-06 The Boeing Company Combined heating cycles to improve efficiency in inductive heating operations
US5683607A (en) * 1991-10-15 1997-11-04 The Boeing Company β-annealing of titanium alloys
US5571436A (en) * 1991-10-15 1996-11-05 The Boeing Company Induction heating of composite materials
US5895854A (en) * 1996-11-08 1999-04-20 Continental Aktiengesellschaft Vehicle wheel provided with a pneumatic tire having therein a rubber mixture permeated with magnetizable particles
US6660122B1 (en) 1998-09-04 2003-12-09 The Goodyear Tire & Rubber Company Induction curable tire components and methods of selectively curing such components
US6308758B1 (en) 1999-07-06 2001-10-30 Continental Ag Elastomeric tire having magnetized sidewall and method of manufacturing same

Also Published As

Publication number Publication date
CA916244A (en) 1972-12-05
GB1300247A (en) 1972-12-20
FR2032466A1 (fr) 1970-11-27
BE729001A (fr) 1969-08-27
BE743276R (fr) 1970-05-28
DE2009015A1 (en) 1970-10-01

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