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WO1986002229A1 - Bloc d'alimentation utilisant de l'energie de micro-ondes pour le chauffage - Google Patents

Bloc d'alimentation utilisant de l'energie de micro-ondes pour le chauffage Download PDF

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Publication number
WO1986002229A1
WO1986002229A1 PCT/SE1985/000369 SE8500369W WO8602229A1 WO 1986002229 A1 WO1986002229 A1 WO 1986002229A1 SE 8500369 W SE8500369 W SE 8500369W WO 8602229 A1 WO8602229 A1 WO 8602229A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
heating unit
microwave energy
heating
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.)
Ceased
Application number
PCT/SE1985/000369
Other languages
English (en)
Inventor
Kay Wallin
Ingemar Nilsson
Bengt Jacobson
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.)
Sprinter System AB
Original Assignee
Sprinter System AB
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 Sprinter System AB filed Critical Sprinter System AB
Publication of WO1986002229A1 publication Critical patent/WO1986002229A1/fr
Priority to DK242286A priority Critical patent/DK242286A/da
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material

Definitions

  • the present invention relates to an apparatus for heat ⁇ ing, with the aid of microwave energy/ thermoplastics material or paper material coated with thermoplastics material/ while utilizing the dielectric losses occurr- ing in the material when it is subjected to a high- frequency electric field such as to generate heat re ⁇ quired in the material for a subsequent seal/ preferably over an elongate heating region.
  • the object of the present invention is to provide an apparatus of the kind mentioned in the introduction/ which comprises a more simplified and more operationally reliable system than used so far/ and which is further ⁇ more less sensitive to contaminants in the heating unit.
  • the apparatus comprises a power pack implemented as a complete aggregate/ which includes a microwave genera ⁇ ting unit and antennae for transmitting microwave energy between units, a heating unit forming the elongate heating region and substantially comprising an elongate hollow section with a similarly elongate slot, the thermoplastics material to be sealed being arranged to move in the slot at a predetermined distance from a tongue formation along the length of the section, the heating unit further being provided with at least two antennae,* preferably arranged at the end areas thereof, for transmitting microwave energy to the units from the microwave energy generating unit, unutilized microwave energy transmitted to the heating unit being trans ⁇ ferable by an antenna at one end area of the heating unit to an energy receiving unit and possibly to the microwave energy generating unit, i.e. the heating unit may function
  • microwave leakage can also be prevented by the tongue configura ⁇ tion of the heating unit having been made shorter than the hollow section by an amount such as to ensure re- tention therein of the microwaves.
  • Fig. 1 is a view from above of the apparatus in accordance with the invention
  • Fig. 2 is an end view of the apparatus illustrated in
  • FIG. 1 is a side view of the apparatus illustrated in
  • the apparatus in accordance with the invention is an individual complete power pack 1, including a microwave energy generating unit 2, a heating unit 3, an energy receiving unit 4, antennae 5/ 6/ 7 for transmitting the microwave energy between the units 2-4/ a casing 8 housing the units/ closed chambers 9 for transferring microwaves/ and unillustrated fastening means for the units 2-4.
  • the heating unit 3 forms an elongate heating region within which the thermoplastics material to be sealed is heated/ the unit 3 including an elongate hollow section 10 provided with a slot 11 along one elongate face.
  • the thermoplastics material which is to be heated and sub ⁇ sequently sealed is arranged to move in and along the slot 11 at a given distance from a tongue configuration 12 along the length of the section 10 and inwards of the slot 11.
  • the heating unit 3 includes at least one antenna 6, 7 at either end area.
  • One antenna 6 transmits microwave energy from the antenna 5 of the microwave energy generating unit 2 to the heating unit 3.
  • the other antenna 7 of the heating unit 3 transmits un ⁇ utilized microwave energy from the heating unit 3 to the energy absorbing unit 4, and to attain the right field strength in the heating unit 3 only a portion of the energy in the energy absorbing unit 4 is absorbed the rest going back again for being taken up by the microwave energy generating unit 2, e.g. when the package or packages in the heating area cannot utilize the energy supplied.
  • the energy receiving unit 4 may include an energy absorbing agent such as water or oil.
  • the longitudinal tongue forma ⁇ tion 12 included therein is made shorter by a multiple of half a wavelength than the hollow section 10 in ⁇ closing the tongue formation.
  • a closed chamber 9 is arranged between the antennae 5 and 6 on the microwave energy generating unit 2 and heating unit 3 for the microwaves transmitted between the antennae 5 and 6.
  • a closed chamber 9 between the other antenna 7 of the heating unit 3 and the energy absorbing unit 4.
  • the power pack 1 also includes lifting means (unillustrated on the drawing) for lifting it from its normal working position, and it also has the heating unit 3 attached to it by quick release couplings (unillustrated on the drawing) .
  • the heating unit 3 may be integrally formed, e.g. by extrusion. Upstream of the heating unit 3, seen in the advancing direction of the packages, there may be at least one (unillustrated) sensing means for regula ⁇ ting the microwave energy generated in the unit in response to the number of packages in the heating unit 3.
  • the microwave energy generating unit 2 is a power source in the form of a magnetron or microwave generator in a semiconductor implementation.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

Un appareil sert à chauffer du matériau thermoplastique ou un matériau en papier recouvert d'un matériau thermoplastique à l'aide de l'énergie de micro-ondes. L'appareil comprend un bloc d'alimentation (1) formé d'un groupe unique comprenant une unité génératrice d'énergie de micro-ondes (2), une unité de chauffage (3), une unité d'absorption d'énergie (4) et des antennes (5-7) pour transmettre l'énergie de micro-ondes entre les unités (2-4). L'unité de chauffage (3) forme une région allongée de chauffage pour les matériaux à chauffer et ensuite à sceller, et comprend une section creuse allongée (10) avec une fente allongée similaire (11) dans laquelle le matériau thermoplastique à sceller se déplace à une distance prédéterminée d'un agencement à languette (12) dans la section (10), sur la partie intérieure de la paroi qui comporte la fente. L'unité de chauffage (3) comprend en outre à ses extrémités deux antennes (6, 7) pour transmettre l'énergie de micro-ondes produite par l'unité génératrice d'énergie de micro-ondes (2) aux différentes unités (2-4). L'énergie de micro-ondes non-utilisée est transférée à l'unité de chauffage (3) et peut être transmise par l'antenne (7) montée à une extrémité de l'unité de chauffage (3) à l'unité d'absorption d'énergie (4) et éventuellement à l'unité génératrice de micro-ondes (2). En d'autres termes, l'unité de chauffage (3) peut fonctionner aussi bien comme un résonateur que comme un conducteur de transmission de micro-ondes.
PCT/SE1985/000369 1984-09-26 1985-09-26 Bloc d'alimentation utilisant de l'energie de micro-ondes pour le chauffage Ceased WO1986002229A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK242286A DK242286A (da) 1984-09-26 1986-05-23 Kraftdel til opvarmning ved hjaelp af mikroboelgeenergi

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8404828A SE443069B (sv) 1984-09-26 1984-09-26 Anordning for uppvermning av termoplastmaterial eller termoplastbelagt pappersmaterial medelst mikrovagsenergi
SE8404828-9 1984-09-26

Publications (1)

Publication Number Publication Date
WO1986002229A1 true WO1986002229A1 (fr) 1986-04-10

Family

ID=20357143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1985/000369 Ceased WO1986002229A1 (fr) 1984-09-26 1985-09-26 Bloc d'alimentation utilisant de l'energie de micro-ondes pour le chauffage

Country Status (7)

Country Link
EP (1) EP0229758A1 (fr)
JP (1) JPS62500272A (fr)
AU (1) AU4964085A (fr)
DK (1) DK242286A (fr)
NO (1) NO862057L (fr)
SE (1) SE443069B (fr)
WO (1) WO1986002229A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969306A (en) * 1986-11-19 1990-11-13 Sprinter System Ab Apparatus for closing a filled, flanged carton tray
US6211503B1 (en) 1998-09-29 2001-04-03 Fraunhofer Gesellschaft Zur Forderung Der Angeandten Forschung E.V Device and method of heating components made of microwave absorbing plastic

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198554A (en) * 1977-07-01 1980-04-15 Cober Electronics, Inc. Method and apparatus for microwave vulcanization of extruded rubber profiles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198554A (en) * 1977-07-01 1980-04-15 Cober Electronics, Inc. Method and apparatus for microwave vulcanization of extruded rubber profiles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969306A (en) * 1986-11-19 1990-11-13 Sprinter System Ab Apparatus for closing a filled, flanged carton tray
US6211503B1 (en) 1998-09-29 2001-04-03 Fraunhofer Gesellschaft Zur Forderung Der Angeandten Forschung E.V Device and method of heating components made of microwave absorbing plastic
SG82644A1 (en) * 1998-09-29 2001-08-21 Dommer Armin Device and method of heating components made of microwave absorbing plastic

Also Published As

Publication number Publication date
SE8404828D0 (sv) 1984-09-26
AU4964085A (en) 1986-04-17
NO862057L (no) 1986-07-23
DK242286D0 (da) 1986-05-23
JPS62500272A (ja) 1987-01-29
DK242286A (da) 1986-05-23
SE443069B (sv) 1986-02-10
EP0229758A1 (fr) 1987-07-29

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