[go: up one dir, main page]

WO2019030310A1 - Dispositif de préchauffage destiné à une presse fonctionnant en continu et procédé de préchauffage d'une nappe de matière à presser - Google Patents

Dispositif de préchauffage destiné à une presse fonctionnant en continu et procédé de préchauffage d'une nappe de matière à presser Download PDF

Info

Publication number
WO2019030310A1
WO2019030310A1 PCT/EP2018/071566 EP2018071566W WO2019030310A1 WO 2019030310 A1 WO2019030310 A1 WO 2019030310A1 EP 2018071566 W EP2018071566 W EP 2018071566W WO 2019030310 A1 WO2019030310 A1 WO 2019030310A1
Authority
WO
WIPO (PCT)
Prior art keywords
microwave
conveying path
preheating device
reflector
microwaves
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/EP2018/071566
Other languages
German (de)
English (en)
Inventor
Ulf KÖNEKAMP
Thilo Solawa
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.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
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 Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of WO2019030310A1 publication Critical patent/WO2019030310A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/029—Feeding; Proportioning; Controlling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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 invention relates to a preheating device for a continuously operating press for producing press plates, in particular material plates made of wood and / or other renewable agricultural products, such as chip, fiber, veneer, straw and chipboard plates, and also plastic plates, for preheating a
  • Pressgutmatte with at least one microwave coupling, which is directed on one side of a conveying path for the Pressgutmatte with its main radiation direction to the conveying path, and with at least one reflector body with at least one
  • Reflector surface which on one of the at least one microwave coupling in the main radiation direction considered opposite side of the conveying path of the arranged at least one microwave coupling.
  • the invention relates to a method for preheating a pressed product mat in the course of the production of press plates, in particular material plates made of wood and / or other renewable agricultural products such as chipboard, fiber, veneer, straw and Schnitzelplatten, and plastic plates, in which of a Side of one
  • the object of the invention is to design a preheating device and a method of the type mentioned, in which the microwaves can be used more efficiently to preheat the pressed material even more evenly.
  • At least one reflector surface has at least one portion which is not directed axially or parallel to the main radiation direction of the at least one microwave coupling.
  • At least a portion of the at least one reflector surface is inclined relative to the main beam direction such that the microwaves impinge obliquely on the at least one section from the at least one microwave coupling and are thus deflected with respect to the main beam direction.
  • Pressgutmatte be penetrated evenly with microwaves.
  • waves forming between the at least one reflector surface and the at least one microwave coupling form.
  • Standing waves have maxima and minima and can cause disturbances or even
  • Pressgutmatte beaten microwaves is also achieved that in the area of the conveying path of the pressed material mat by the preheating a chaotic radiation field can be achieved.
  • a chaotic or disordered radiation field the microwaves are ideally not aligned uniformly.
  • an ideal chaotic radiation field has no standing wave.
  • the conveying path is the path on which the pressed material mat is conveyed through the preheating device.
  • the conveying path is usually predetermined by a corresponding conveyor track.
  • the conveyor track can be an endless continuous
  • the conveyor track can advantageously as
  • Conveyor belt, forming belt, roller conveyor or the like can be realized.
  • the conveying path can describe a surface, in particular a plane, in which a direction of production of the pressed material mat by the
  • the Pressgutmatte may advantageously consist of fibers, chips, strands, veneers or similar goods or materials or have these.
  • the pressed material may be strewn or laid on the conveyor track, with which it through the
  • Preheating device can be performed.
  • the pressed material mat can be conveyed to an inlet of a following continuously operating press.
  • the press the pressed material mat becomes a press plate, in particular one
  • the pressed product mat can be penetrated differently. Microwaves which pass through the pressed material mat are reflected back with the corresponding at least one reflector surface.
  • the preheating device according to the invention can be realized as a microwave oven, in particular as a microwave continuous furnace.
  • the at least one microwave coupling can radiate into a space of the preheating device.
  • the room may be closed to the outside with respect to microwaves to prevent microwaves from entering the environment.
  • the space of the preheating device, in which the preheating of the pressed material mat takes place, can be used as a preheating space, in particular a furnace space or
  • Furnace chamber to be called.
  • Microwaves with the frequency of 915 MHz or 2.45 GHz are used.
  • the frequency is not determined exactly to the specified frequency, it can be used in this way in particular legally permitted frequency bands become.
  • the invention is not limited to these frequencies, and microwaves in other frequency ranges can also be used.
  • Microwaves with a frequency of 915 MHz are known to have a greater penetration depth into the material of the press mat than microwaves with a frequency of 2.45 GHz.
  • the penetration depth in common press material mats can be about 0.489 m.
  • the penetration depth can be about 0.183 m. If the mat thickness is smaller than the penetration depth, some of the microwaves will leave the press mat on the opposite side. The microwaves so unused out of the pressed material mat out.
  • the reflection according to the invention enables the use of these emerging microwaves. With the invention can therefore also at high
  • all microwave couplings can be the same or
  • the reflector surfaces may be similar or different.
  • the reflector surfaces may differ in size and / or shape.
  • At least one reflector surface may be in the form of a tile.
  • the reflector surfaces may be inclined in the same way or differently.
  • At least one microwave coupling can be implemented on at least one microwave source and / or at least one microwave coupling can be implemented on at least one microwave conductor.
  • At least one microwave injection can be realized on at least one corresponding microwave source. This way can be additional
  • Microwave conductors are dispensed with which the microwaves from the
  • Microwave source are passed to the preheating room.
  • at least one microwave coupling can be implemented on at least one microwave conductor.
  • the microwave conductor can lead to a corresponding microwave source, which in this case is more flexible,
  • the pressed material mat can be irradiated over its entire width with microwaves. This is particularly advantageous when using microwave frequencies with a frequency of 915 MHz, for which previously correspondingly large waveguides were required.
  • each individual microwave source can be connected via a corresponding microwave conductor to the preheating space of the preheating device.
  • the output of each microwave conductor each forms a microwave coupling.
  • Runtime tube in particular a magnetron, a klystron or the like, or based on a semiconductor element, in particular a Gunn element, a tunnel diode or the like, or be implemented in another suitable manner.
  • At least one microwave conductor can be realized as a waveguide, coaxial line, microstrip line or in another suitable manner.
  • the preheater may have up to 300 microwave sources and more.
  • Each microwave source may advantageously have a power between about 1 kW and about 100 kW, preferably between about 2 kW and about 50 kW, more preferably between 2 kW and 15 kW. In this way, a correspondingly large amount of energy can be introduced for heating in the pressed material mats.
  • a main radiation direction of at least one microwave coupling can be directed perpendicular to the conveying path and / or a main radiation direction of at least one microwave coupling can be directed obliquely to the conveying path.
  • a main beam direction perpendicular to Conveyance can reach the corresponding microwaves on the shortest route through the pressed material mats.
  • Main beam direction be directed obliquely to the conveying path. In this way, a longer fürdringungsweg be made possible, whereby correspondingly more energy can be transmitted to heat the Pressgutmatten.
  • microwave couplings with main beam directions perpendicular to the conveying path or exclusively microwave couplings with the main beam direction can be realized obliquely to the conveying path.
  • both main beam directions can be realized perpendicular to the conveying path and obliquely to the conveying path. In this way, a more uniform heating of the pressed material mat can be produced. Furthermore, the radiation field can thereby be more disordered with respect to the alignment, in particular of the polarization directions.
  • At least a portion of at least one reflector surface may be directed perpendicular to the conveying path and / or at least a portion of at least one reflector surface may be inclined to the
  • Reflector surface can be achieved that in the case of a microwave coupling with a main beam direction perpendicular to the conveying path, the reflected microwaves are reflected at the at least one section obliquely to the main beam direction.
  • either only sections may be provided, which are directed perpendicular to the conveying path, or only sections, which are directed obliquely to the conveying path.
  • both portions which are directed perpendicular to the conveying path, as well as portions which are inclined are directed to the conveying path, be provided.
  • Main beam direction ie an angle between the direction of the at least one
  • Section and the corresponding main beam direction between about -60 ° and + 60 °, in particular between about -45 ° in + 45 °.
  • a penetration of the pressed material mat with the reflected microwaves can be improved and at the same time a more uniform but nevertheless disordered radiation field can be realized.
  • At least one section of at least one reflector surface in the production direction and / or at least one section at least one
  • a direction of at least one section of at least one reflector surface may be inclined towards a center of a preheating space of the preheating device.
  • the center of the preheat space may be between an inlet of the housing of the preheater, through which the
  • Pressgutmatte reaches the area of the preheater, and an outlet of the housing. Furthermore, the center between corresponding
  • portions of at least one reflector surface located near the inlet may be inclined away from the inlet.
  • portions located near the outlet may be inclined away from the outlet.
  • at least one reflector surface may be disposed at an inlet or an outlet of the preheater so that the microwaves are reflected back into the preheat space. In this way, a leakage radiation can be reduced and an efficiency of the preheater can be increased.
  • At least two microwave couplings can be provided, which can couple microwaves with spatially different polarization directions.
  • Polarization directions can be a disordered microwave radiation field in the preheating, which passes through the pressed material mat, can be realized.
  • Microwave couplings perpendicular to each other.
  • a plurality of microwave couplings may be arranged in a row or a plurality of rows.
  • the microwave couplings can
  • the adjacent microwave couplings can with respect to their respective main beam direction
  • a plurality of microwave couplings can be arranged on the same side of the conveying path and / or a plurality of microwave couplings can be arranged on opposite sides of the conveying path. In this way, a space of the preheating by appropriate
  • all microwave couplings can be arranged on the same side. In this way, the appropriate side of the
  • Preheating device in particular of the housing, exclusively for the microwave Einkopplitch be provided. Accordingly, the opposite side can be provided exclusively for reflector surfaces.
  • the reflector surfaces can be arranged on the respective opposite sides. On one side both microwave couplings and reflector surfaces can be arranged. The microwave couplings and the reflector surfaces can be realized alternately.
  • the microwave radiation can be effected by the microwave couplings both from the bottom of space as well as from above.
  • the microwave irradiation can be done either from above or from below. In this way, depending on the design of the microwave irradiation
  • a plurality of reflector surfaces may be arranged on the same side of the conveying path and / or a plurality of reflector surfaces may be arranged on different sides of the conveying path.
  • the reflector surfaces can be provided only on one side or on both sides of the conveying path.
  • reflector surfaces can be arranged on both sides of the conveying path even when the microwave couplings are located only on one side of the conveying path. In this way possible multiple reflections can be made possible.
  • Main beam direction and / or at least one direction at least a portion of at least one reflector surface may be fixed.
  • the preheater can be adjusted to a
  • the directions can depend on the type and / or size of the
  • the preheating device can before the
  • Reflector surfaces can be manually and / or automatically adjustable. To this
  • Sections of the reflector surfaces are adjusted so that the reflected microwaves can not radiate back into the corresponding opposite microwave coupling.
  • At least one reflector surface can be completely or at least partially planar and / or at least one reflector surface can be uneven, wholly or at least in sections.
  • the same reflection can be specified over a correspondingly larger surface area.
  • Uneven reflector surfaces have the advantage that with them a chaotic radiation field can be realized more easily.
  • Preheating room can be used.
  • At least one reflector surface may be concave, convex, pyramidal and / or undulating, or the like, at least in sections his.
  • the surface of the at least one reflector surface can also be arbitrary. It may have the shape of an egg carton, a milled reflection pattern, in particular angled strips, pyramids or the like.
  • at least one microwave coupling takes place
  • the object is achieved in a method according to the invention in that at least a part of the passing and reflected by the Pressgutmatte
  • Microwave is deflected relative to the main beam direction. In this way it is prevented that the reflected microwaves are sent back on the same path on which the original microwaves came through the pressed material mat. Thus, a radiation field in the area of the pressed material mat can be realized more disorderly. Furthermore, standing waves can be prevented.
  • Figure 2 is a spatially upper inside of the preheating device of Figure 1;
  • FIG. 3 shows a longitudinal section of the preheating device from FIG. 1;
  • FIG. 4 shows a spatial lower inner side of the preheating device from FIG. 1;
  • FIG. 5 shows a reflector body of the preheating device from FIG. 1 according to a first exemplary embodiment
  • FIG. 6 shows a reflector body for a preheating device according to a second
  • FIG. 7 shows a reflector body for a preheating device according to a third embodiment
  • FIG. 8 shows a reflector body for a preheating device according to a fourth
  • a plant 10 for the production of press plates 12 is shown schematically.
  • the system 10 comprises a conveyor track in the form of a forming belt 14, in the figure 1 left.
  • Pressgutmatten 16 are conveyed from scattered and / or applied press material by a preheating device 18 along a conveying path 20 in a production direction 22 to an inlet 24 of a continuously operating press 26.
  • the pressed material includes, for example, wood and / or other renewable agricultural products such as chips, fibers, straw and chips, and / or plastic.
  • the material to be pressed has been provided on the forming belt 14 before being sprinkled or deposited with a binder with which it cures in the press 26 to the pressing plates 12.
  • the press 26 the
  • FIGS. For better orientation, an orthogonal x-y-z coordinate system is shown in FIGS.
  • the x-axis extends parallel to
  • the x-y plane is spatially horizontal and the z-axis is spatially vertically upward.
  • the figure 1 shows the y-axis in the
  • the conveying path 20 is predetermined by the forming belt 14 and extends within the preheating device 18 by way of example flat and spatially horizontal.
  • the preheating device 18 will be explained in more detail below with reference to Figures 2 to 4.
  • FIG. 2 shows the spatially upper inner side of a housing 30 of the preheating device 18.
  • FIG. 4 shows the spatially lower inner side of the housing 30
  • the preheater 18 is as a microwave oven, preferably as
  • the preheating device 18 comprises the microwave-tight housing 30, which surrounds a preheating chamber 32.
  • the preheating chamber 32 has an inlet 34 and an outlet 36, through which the forming belt 14 leads into the preheating room 32 and leads out of this.
  • each a plurality of microwave Einkopplind 38 is arranged, which are implemented at outputs of corresponding microwave conductors.
  • the upper microwave Einkoppler 38 and the lower microwave Einkoppler 38 are located with respect to the conveying path 20 on opposite sides.
  • the microwave conductors each come from corresponding microwave sources, not shown in the figures.
  • the microwave sources may be, for example, magnetrons, klystrons or microwave sources based on semiconductors.
  • microwave Einkopplungs are or microwave sources used.
  • 32 Einkopplungs in or microwave sources are used.
  • Each microwave Einkoppler 38 may be assigned its own microwave source.
  • a microwave source can also supply microwaves to several microwave input couplers. It can also be used more or less microwave sources. The used
  • Microwave sources may have a microwave power of 1 kW to 100 kW, preferably between about 2 kW and about 50 kW, more preferably between 2 kW and 15 kW. In an alternative, not shown,
  • the microwave Einkoppler 38 can also be implemented directly on the microwave sources. In this case, can be dispensed with separate microwave conductor. This may be the case if appropriately compact Microwave sources, for example in the form of semiconductor elements, are used.
  • the upper microwave Einkoppler 38 are arranged by way of example in nine rows, each with four microwave Einkopplind 38. The rows each extend
  • each with four microwave input couplers 38 is arranged below in the housing 30 by way of example.
  • the rows of the upper microwave Einkoppler 38 are offset from the rows of the lower microwave Einkoppler 38, so arranged on "gap".
  • the microwave Einkoppler 38 are each aligned so that their respective
  • Main beam direction 40 as indicated in Figure 3, by way of example perpendicular to the conveying path 20 shows.
  • the microwaves emitted by the microwave couplers 38 are predetermined so that they can penetrate the pressed material mats 16 over their entire thickness in the direction of the z-axis. In this way, the pressed material mat 16 is preheated inside, so that a later curing in the press 26 a faster curing is possible.
  • microwave sources microwaves are generated with a microwave frequency of 915 MHz example. Microwaves with this
  • Pressgutmatten 16 for example, a penetration depth of about 0.489 m. If the thickness of the pressed material mat 16 is less than the penetration depth, microwaves pass through the pressed material mat 16.
  • Microwave frequency can also microwave at other frequencies or other frequency band, for example, 2.45 GHz, can be used. These have a lower penetration depth, for example, about 0.183 m.
  • Each adjacent microwave Einkoppler 38 are with respect to their respective
  • Main beam direction 40 is rotated so that their polarization direction 42 to each other stand vertically. In this way, a chaotic radiation field in the preheating room 32, which passes through the pressed material mat 16, can be realized.
  • an elongate upper reflector body 44 is arranged by way of example in each case. Below the housing 30 corresponding lower reflector body 44 are arranged analogously to the upper reflector bodies 44. In contrast to the upper arrangement are below in
  • Production direction 22 is viewed in front of the first row of the lower microwave Einkoppler 38 and after the last row of the lower microwave Einkoppler 38 each arranged an additional lower reflector body 44.
  • the upper and lower reflector bodies 44 extend, for example, across the width of the
  • the reflector body 44 consists of two rows, each with nine segments, each of which is an exemplary level
  • Reflector surface 46 form for the microwaves. At the reflector surfaces 46, the microwaves used can be reflected.
  • the direction 47 of the reflector surfaces 46 are known to be perpendicular to selbigen and show away from them.
  • the reflector body 44 shown in Figure 3 and thus the reflector surfaces 46 are about a respective imaginary axis which is parallel to the y-axis, with respect to a conveyor 20, so also to the xy plane, parallel plane in each case by an inclination angle 48 of about 45th ° inclined. Accordingly, the directions 47 of the reflector surfaces 46 are each at an equal angle to the
  • Main beam direction 40 of the corresponding opposite microwave Einkoppler 38 inclined. Since the reflector surfaces 46 are exemplary flat, this applies equally to the directions 47 in all sections of a reflector surface 46.
  • the directions 47 of the reflector surfaces 46 are each inclined toward a center 50.
  • the center 50 is indicated in the figure 3 with a cross.
  • Pressgutmatte 16 pass through to the press material mat 16 so back, particularly preferably in the direction of the center 50, reflects that they are opposite to the
  • Main beam direction 40 of the original microwaves are deflected. In this way, a more uniform, overall chaotic radiation field in the
  • the inclination angles 48 of the reflector bodies 44 can be adjusted.
  • Setting the inclination angle 48 may be changed, for example, depending on the thickness and / or the material of the used Pressgutmatte 16.
  • the pressed material mat 16 is conveyed with the forming belt 14 continuously along the conveying path 20 in the production direction 22 through the preheating device 18 and preheated there.
  • microwaves in the direction of the respective microwave main beam direction 40 are sent into the pressed material mat 16 from above with the upper microwave Einkoppler 38 from above and with the lower microwave Einkopplern 38 from below.
  • the microwaves provide for heating.
  • a portion of microwaves penetrates the pressed material mat 16 and emerges on the respective opposite side from the pressed material mat 16.
  • the emerging microwaves reach the respective reflector bodies 44 and are reflected there at the corresponding reflector surfaces 46. Due to the inclination of the reflector surfaces 46, the microwaves are compared to the corresponding
  • Microwave main beam direction 40 deflected The reflected microwaves 52 are sent obliquely into the pressed material mat 16 and there ensure further heating of the pressed material.
  • the preheated Pressgutmatte 16 is further transported with the forming belt 14 to the inlet 24 of the press 26. In the press 26, the Pressgutmatte 16 is pressed in a manner of no further interest to the pressing plate 12, which leaves the press 26 at its outlet.
  • FIG. 6 shows an arrangement of reflector bodies 144 according to a second exemplary embodiment. In contrast to the first exemplary embodiment, a plurality of reflector bodies 144 are arranged in a row here.
  • Reflector bodies 144 each have planar reflector surfaces 146.
  • Reflector bodies 144 are inclined differently relative to one another.
  • FIG. 7 shows a reflector body 244 according to a third exemplary embodiment.
  • the reflector body 244 has the shape of a section of a round
  • the corresponding reflector surface 246 is located at
  • FIG. 8 shows a reflector body 344 according to a fourth exemplary embodiment.
  • the reflector body 344 has a plurality of reflector surfaces 346, which are realized on pyramidal elevations of the reflector body 344 on the side facing the corresponding microwave Einkoppler 38 side.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

L'invention concerne un dispositif de préchauffage (18) destiné à une presse fonctionnant en continu pour la fabrication de panneaux pressés, en particulier de panneaux de matériau dérivé du bois et/ou d'autres produits agricoles renouvelables, par exemple des panneaux de copeaux, de fibres, de contre-plaqué, de paille et de particules, ainsi que des panneaux en matière plastique, et un procédé de préchauffage d'une nappe de matière à presser (16). Le dispositif de préchauffage (18) comprenant au moins un dispositif d'injection de micro-ondes (38) dont la direction principale de rayonnement (40) est orientée sur un côté d'un trajet de transport (20) de la nappe de matière à presser (16) vers le trajet de transport (20). Le dispositif de préchauffage (18) comprend par ailleurs au moins un élément réfléchissant (44) présentant au moins une surface réfléchissante (46) qui est agencée sur un côté du trajet de transport (20) du ou des dispositifs d'injection de micro-ondes (38) qui fait face au/aux dispositifs d'injection de micro-ondes (38) vu dans la direction principale de rayonnement (40). Au moins une surface réfléchissante (46) présente au moins une partie qui n'est pas orientée axialement ou parallèlement à la direction principale de rayonnement (40) du ou des dispositifs d'injection de micro-ondes (38).
PCT/EP2018/071566 2017-08-08 2018-08-08 Dispositif de préchauffage destiné à une presse fonctionnant en continu et procédé de préchauffage d'une nappe de matière à presser Ceased WO2019030310A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017118016.8 2017-08-08
DE102017118016.8A DE102017118016A1 (de) 2017-08-08 2017-08-08 Vorwärmvorrichtung für eine kontinuierlich arbeitende Presse und Verfahren zur Vorwärmung einer Pressgutmatte

Publications (1)

Publication Number Publication Date
WO2019030310A1 true WO2019030310A1 (fr) 2019-02-14

Family

ID=63174254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/071566 Ceased WO2019030310A1 (fr) 2017-08-08 2018-08-08 Dispositif de préchauffage destiné à une presse fonctionnant en continu et procédé de préchauffage d'une nappe de matière à presser

Country Status (2)

Country Link
DE (1) DE102017118016A1 (fr)
WO (1) WO2019030310A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4032496A1 (de) * 1989-10-12 1991-04-25 Wieneke Franz Einrichtung zur applikation von mikrowellen hoher intensitaet
DE19718772A1 (de) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
EP2247418B1 (fr) 2007-12-30 2013-05-22 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé et dispositif pour préchauffer une natte de matériau à comprimer, au cours de la fabrication de panneaux en matériau dérivé du bois
DE202016102908U1 (de) * 2016-05-31 2017-07-03 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Herstellung von Holzwerkstoffplatten sowie Holzwerkstoffplatte

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4032496A1 (de) * 1989-10-12 1991-04-25 Wieneke Franz Einrichtung zur applikation von mikrowellen hoher intensitaet
DE19718772A1 (de) * 1997-05-03 1998-11-05 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
EP2247418B1 (fr) 2007-12-30 2013-05-22 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé et dispositif pour préchauffer une natte de matériau à comprimer, au cours de la fabrication de panneaux en matériau dérivé du bois
DE202016102908U1 (de) * 2016-05-31 2017-07-03 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Herstellung von Holzwerkstoffplatten sowie Holzwerkstoffplatte

Also Published As

Publication number Publication date
DE102017118016A1 (de) 2019-02-14

Similar Documents

Publication Publication Date Title
EP2247418B1 (fr) Procédé et dispositif pour préchauffer une natte de matériau à comprimer, au cours de la fabrication de panneaux en matériau dérivé du bois
DE19718772B4 (de) Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
DE10157601B4 (de) Vorrichtung zur Erwärmung von Pressgut bei der Herstellung von Werkstoffplatten
DE102016110808A1 (de) Verfahren zum kontinuierlichen Erwärmen einer Materialbahn und Durchlaufofen
EP2030748B1 (fr) Machine de dispersion destinée à la formation d'une nappe de moulage sous pression ou d'une couche de celle-ci lors de la fabrication de plaques de matière première en bois et procédé de fonctionnement d'une machine de dispersion
DE102009040772A1 (de) Wellenleiterelement
EP3294512B1 (fr) Dispositif et procédé pour la production continue de matériaux
DE102015107380B4 (de) Vorrichtung zum kontinuierlichen Erwärmen von Material
EP3310130B1 (fr) Four à réchauffer continu permettant le chauffage continu d'une nappe
DE102013009064B3 (de) Mikrowellen-Durchlaufofen
DE102015111555B3 (de) Anordnung zur Behandlung von Materialien mit Mikrowellen
EP2767389B1 (fr) Presse à chaud à double bande
DE202015102417U1 (de) Vorrichtung zur kontinuierlichen Herstellung von Werkstoffen
WO2019030310A1 (fr) Dispositif de préchauffage destiné à une presse fonctionnant en continu et procédé de préchauffage d'une nappe de matière à presser
DE202015102422U1 (de) Vorrichtung zum kontinuierlichen Erwärmen von Material
DE102018105385B4 (de) Durchlaufofen und Anlage zur Herstellung von Holzwerkstoffplatten
DE202017104748U1 (de) Vorwärmvorrichtung für eine kontinuierlich arbeitende Presse
DE102017104064B4 (de) Verfahren zum Betreiben eines Durchlaufofens und Durchlaufofen
DE10037508B4 (de) Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
DE102018105390B4 (de) Durchlaufofen und Anlage zur Herstellung von Holzwerkstoffplatten
WO2018154093A1 (fr) Four à passage continu pour le chauffage de matériau au moyen de micro-ondes
DE202017101105U1 (de) Durchlaufofen zur Erwärmung von Material mittels Mikrowellen
DE102013010108B4 (de) Verfahren zur Herstellung eines bemaßten Materials, insbesondere einer Furnierschichtholzplatte
DE202016102908U1 (de) Vorrichtung zur Herstellung von Holzwerkstoffplatten sowie Holzwerkstoffplatte

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18753385

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18753385

Country of ref document: EP

Kind code of ref document: A1