EP3461231A1 - Applicateur destiné à l'activation thermique d'une couche fonctionnelle d'un matériau de revêtement - Google Patents

Applicateur destiné à l'activation thermique d'une couche fonctionnelle d'un matériau de revêtement Download PDF

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Publication number
EP3461231A1
EP3461231A1 EP18196564.1A EP18196564A EP3461231A1 EP 3461231 A1 EP3461231 A1 EP 3461231A1 EP 18196564 A EP18196564 A EP 18196564A EP 3461231 A1 EP3461231 A1 EP 3461231A1
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EP
European Patent Office
Prior art keywords
applicator
coating material
sheath
electromagnetic waves
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
EP18196564.1A
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German (de)
English (en)
Other versions
EP3461231B1 (fr
Inventor
Jonathan Würz
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.)
Homag GmbH
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Homag GmbH
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Publication date
Application filed by Homag GmbH filed Critical Homag GmbH
Publication of EP3461231A1 publication Critical patent/EP3461231A1/fr
Application granted granted Critical
Publication of EP3461231B1 publication Critical patent/EP3461231B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/701—Feed lines using microwave applicators
    • 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
    • H05B6/788—Arrangements for continuous movement of material wherein an elongated material is moved by applying a mechanical tension to it

Definitions

  • the present invention relates to an applicator for thermally activating a functional layer of a coating material. Moreover, the present invention relates to a device for thermally activating the functional layer of the coating material, a sheath for use in an applicator for thermally activating coating material and the use of the sheath.
  • an adhesive or an adhesive is used.
  • an adhesive which is activated by an energy input and only then can produce a reliable connection between two components (coating material and workpiece).
  • thermo activation of the functional layer by means of electromagnetic waves in particular in the microwave spectrum.
  • electromagnetic waves in the microwave spectrum can have advantages in terms of accuracy and adaptability of the amount of energy in the functional layer.
  • an applicator as shown in FIG Fig. 1 has an opening 9, through which a coating material 8 can be passed. Electromagnetic waves are generated for example in a generator, not shown, and then applied via a waveguide 6. To protect the waveguide 6, two glass sheets 2 are provided, which are provided on both sides of the coating material 8. These glass sheets 2 are taken in grooves 7.
  • lambda / 4 traps 4 are provided which extinguish the waves in the region of the opening 9 by means of destructive interference can.
  • the lambda / 4 traps 4 are here in slot-shaped pockets, but may also be embodied in a different geometric shape.
  • the thermal energy input into the functional layer of the coating material can lead to particle-containing outgassing, which can be precipitated as soiling. Even dusty ambient air and abrasion of the coating material can lead to such contamination.
  • the contaminants shown above can be reflected on the glass panes 2, the grooves 7, the opening 9 and the lambda / 4 traps 4.
  • Such contamination can lead to arcing, wherein such an arc can destroy the applicator 1 and / or the edge band.
  • DE 10 2014 201 426 A a cooking device in microwave technology with microwave trap in lambda / 4 form.
  • the object of the present invention is to provide an applicator for thermally activating a functional layer of a coating material, which can be cleaned in a less expensive and time-consuming manner.
  • the present invention provides the applicator of claim 1.
  • the invention was based on the finding that the above-mentioned problems are mainly due to the fact that the cleaning takes place at not easily accessible points inside the applicator and that the grooves 7 and the lambda / 4 traps 4 in the applicator 1 non-planar Have surfaces.
  • the present invention provides an applicator for thermally activating a functional layer of a coating material.
  • the applicator has in this case: a main body, a waveguide and a cladding made of dielectric, wherein the cladding is arranged removably in the base body, the cladding is configured to guide the coating material along a passage direction and encase, the waveguide is capable of to direct electromagnetic waves, in particular microwaves, in the direction of the coating material carried in the envelope.
  • the thermal activation and the guiding of the coating material within the envelope makes it possible that accumulating impurities only settle in the envelope. Since the wrapper is still removable, it can be easily replaced or cleaned become. Furthermore, it is possible to use an exchange wrapper while the actual wrapper is being cleaned, thereby preventing production stoppage.
  • the sheath of the applicator may additionally have a guide which is variably adjustable for guiding the coating material.
  • the applicator preferably has at least one lambda / 4 trap, which is provided for erasing the electromagnetic waves at openings of the applicator.
  • the amount of electromagnetic radiation outside the applicator can be reduced. It may further be preferred that at least one lambda / 4 trap is filled with dielectric. By this filling the cleaning can be reduced or eliminated.
  • the sheath of the applicator may be configured to seal the waveguide against the coating material.
  • the sheath can preferably be designed such that only a region of the guide necessary for it is in contact with the guided coating material.
  • abrasion created by the guide is limited to a minimum.
  • the waveguide may have a substantially rectangular cross-section.
  • the wavelength is lower here than when using a round cross-section, which makes a substantially rectangular cross section suitable for use in small installation space ratios.
  • the envelope may have a wall thickness of 0.1 mm to 40 mm. This value range has proven to be particularly preferred in order to optimize an energy input into the functional layer of the coating material while maintaining the structural integrity.
  • substantially the entire waveguide is filled with the sheath.
  • the wrapper has a permittivity loss factor of less than 5x10 -3, and more preferably less than 5x10 -4, and may be formed of polytetrafluoroethylene, quartz glass or alumina, for example.
  • the present invention provides an apparatus for thermally activating a coating material, comprising: a generator for generating electromagnetic waves, in particular microwaves, and an applicator as shown above, which is able to apply the electromagnetic waves generated in the generator to the coating material.
  • the present invention discloses a dielectric sheath for use in an applicator for thermally activating coating material by electromagnetic waves, particularly microwaves, wherein the sheath is configured to guide and encase the coating material along a direction of travel.
  • This sheath may preferably be used in or with an applicator as shown above.
  • the use of the sheath in the applicator thus has the technical effect of enabling easy and quick cleaning of the applicator and sheath unit.
  • Fig. 2 shows a preferred embodiment of an applicator according to the invention.
  • Applicator 10 is intended to be connected to a generator and a feed device (both not shown) that generates electromagnetic waves and directs them to the resonant cavity. Furthermore, it is provided that these electromagnetic waves thermally activate a functional layer 3 of a coating material 8.
  • microwaves in a frequency band between 2.4 GHz - 2.5 GHz are provided, but also the frequency band of 5.725 GHz - 5.875 GHz is conceivable for this purpose.
  • This is provided for in the Radio Regulations of the Constitution and Convention of the International Telecommunication Union, an international treaty on radio frequency use as the ISM band (Industrial, Scientific and Medical Band) and thus also for such applications.
  • the applicator initially consists of the main body 13, which forms the structure of the applicator 10 and receives further elements thereof.
  • the waveguide 14 is arranged, which in this preferred embodiment has a substantially rectangular shape along a propagation direction of the electromagnetic waves. In Fig. 2 this propagation direction of the electromagnetic waves can be seen as orthogonal to a feed direction 5 of the coating material 8.
  • a sheath 11 is further provided, which envelops the coating material 8 and thus shields from the interior of the applicator 10, in particular of the waveguide 14.
  • no dirt can reach these inner areas, which is costly and lengthy cleaning operations would involve.
  • the envelope 11 is removable from the applicator 10. In the preferred embodiment shown here, this is done by pushing out together with the coating material 8.
  • the envelope 11 is further preferably designed in two parts, whereby a simple release of the enveloping state of the envelope 11 can be achieved.
  • the connection of the two halves with one another can preferably take place by way of configurations which are helpful for the positioning, such as pockets and grooves.
  • a flat surface may be provided at the point where both halves meet.
  • the sheath 11 can thus be used in a process in which a further thermal activation process of the coating material 8 can be continued with only a brief interruption, while the sheath 11 is replaced by a cover 11 of the same design. While this new enclosure is still being used to thermally activate the coating material 8, the enclosure may 11 be cleaned, for example, and then exchanged again at a given time.
  • the sheath 11 is preferably formed of a material having a permittivity loss factor of less than 5x10 -O3, and more preferably less than 5x10 -04 , to cause as little energy loss in the sheath 11 as possible, which would be manifested by a temperature increase thereof.
  • a permittivity loss factor of less than 5x10 -O3, and more preferably less than 5x10 -04 , to cause as little energy loss in the sheath 11 as possible, which would be manifested by a temperature increase thereof.
  • dielectrics particularly suitable materials here polytetrafluoroethylene, quartz glass or alumina have been found with a wall thickness of 0.1 mm to 40 mm. The wall thickness does not necessarily have to be a constant strength, but can also be variable to allow greater structural integrity.
  • part of the waveguide 14 is filled with the cladding 11 and thus with dielectric in solid form.
  • the dimensions of the applicator can be reduced by a factor depending on the dielectric used.
  • the envelope 11 introduced into the waveguide can reduce the geometrical length dimensions of the applicator 10, and at the same time no contaminants can penetrate into the waveguide 14.
  • the lambda / 4 traps may further be at least partially covered by the sheath 11 or filled with dielectric. Thus, they can not pollute and a cleaning is eliminated.
  • bores for introducing a flushing fluid such as air into the applicator for flushing the same can be introduced into the envelope. These holes ensure that outgassing from the Function layer are transported out of the applicator addition. Furthermore, the use of a protective gas can prevent a possible oxidation of the functional layer with the atmospheric oxygen.
  • Fig. 3 shows the envelope of a preferred embodiment of an applicator according to the invention.
  • the envelope 11 may have a guide 12 which is designed adjustable.
  • the same envelope 11 can be used with coating materials of various sizes.
  • the height-adjustable guide is provided on an upper side of the coating material 8. It is also possible to provide the variable guide on a lower side of the coating material 8 or, alternatively, to use two guides, allowing centering of the coating material within the resonator cavity.
  • Fig. 4 shows the enclosure of a preferred embodiment of an applicator according to the invention in exploded view.
  • a lower edge of the sheath 11 and the guide 12 allow guiding of the coating material at a lower and upper edge thereof.
  • the guiding is preferably done with minimal friction and thus minimal material removal, so that there is as little abrasion as possible.
  • the upper and lower edges of the envelope 11 may, for example, be polished to reduce their surface roughness or be provided with coatings.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP18196564.1A 2017-09-26 2018-09-25 Applicateur destiné à l'activation thermique d'une couche fonctionnelle d'un matériau de revêtement Active EP3461231B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017122249.9A DE102017122249A1 (de) 2017-09-26 2017-09-26 Applikator zum thermischen Aktivieren einer Funktionsschicht eines Beschichtungsmaterials

Publications (2)

Publication Number Publication Date
EP3461231A1 true EP3461231A1 (fr) 2019-03-27
EP3461231B1 EP3461231B1 (fr) 2023-07-12

Family

ID=63683753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18196564.1A Active EP3461231B1 (fr) 2017-09-26 2018-09-25 Applicateur destiné à l'activation thermique d'une couche fonctionnelle d'un matériau de revêtement

Country Status (2)

Country Link
EP (1) EP3461231B1 (fr)
DE (1) DE102017122249A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718580A (en) * 1951-08-22 1955-09-20 Frederick Shirley Method and apparatus for electrically heating dielectrics
EP0103396A2 (fr) * 1982-08-10 1984-03-21 Macmillan Bloedel Limited Applicateur micro-ondes pour presse à fonctionnement continu
WO1992003027A1 (fr) * 1990-07-27 1992-02-20 Macmillan Bloedel Limited Systeme de cuisson par micro-ondes
WO2001011925A1 (fr) * 1999-08-11 2001-02-15 Industrial Microwave Systems, Inc. Procede et appareil destines a exposer des materiaux plans ou autres a des rayonnements electromagnetiques
DE102014213526A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102014213533A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102014213530A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102016200173A1 (de) * 2016-01-08 2017-07-13 Homag Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102016200175A1 (de) * 2016-01-08 2017-07-13 Homag Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10029043A1 (de) 2000-06-13 2002-01-03 Bulthaup Gmbh & Co Möbelplatte und Verfahren zu deren Herstellung
DE102014201426A1 (de) 2014-01-27 2015-07-30 BSH Hausgeräte GmbH Gargerät

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718580A (en) * 1951-08-22 1955-09-20 Frederick Shirley Method and apparatus for electrically heating dielectrics
EP0103396A2 (fr) * 1982-08-10 1984-03-21 Macmillan Bloedel Limited Applicateur micro-ondes pour presse à fonctionnement continu
WO1992003027A1 (fr) * 1990-07-27 1992-02-20 Macmillan Bloedel Limited Systeme de cuisson par micro-ondes
WO2001011925A1 (fr) * 1999-08-11 2001-02-15 Industrial Microwave Systems, Inc. Procede et appareil destines a exposer des materiaux plans ou autres a des rayonnements electromagnetiques
DE102014213526A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102014213533A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102014213530A1 (de) * 2014-07-11 2016-01-14 Homag Holzbearbeitungssysteme Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102016200173A1 (de) * 2016-01-08 2017-07-13 Homag Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht
DE102016200175A1 (de) * 2016-01-08 2017-07-13 Homag Gmbh Vorrichtung zur Erwärmung einer Funktionsschicht

Also Published As

Publication number Publication date
DE102017122249A1 (de) 2019-03-28
EP3461231B1 (fr) 2023-07-12

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