EP3310130A2 - Continuous furnace for the continuous heating of a compressed material mat - Google Patents
Continuous furnace for the continuous heating of a compressed material mat Download PDFInfo
- Publication number
- EP3310130A2 EP3310130A2 EP17191051.6A EP17191051A EP3310130A2 EP 3310130 A2 EP3310130 A2 EP 3310130A2 EP 17191051 A EP17191051 A EP 17191051A EP 3310130 A2 EP3310130 A2 EP 3310130A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- continuous furnace
- housing
- antenna
- waveguide slot
- 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
Links
- 239000000463 material Substances 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 239000002023 wood Substances 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 5
- 102100040428 Chitobiosyldiphosphodolichol beta-mannosyltransferase Human genes 0.000 description 7
- 230000005855 radiation Effects 0.000 description 6
- 238000003892 spreading Methods 0.000 description 6
- 229920002522 Wood fibre Polymers 0.000 description 4
- 239000002025 wood fiber Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
-
- 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
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
-
- 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
- H05B6/707—Feed lines using waveguides
- H05B6/708—Feed lines using waveguides in particular slotted waveguides
-
- 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
- H05B6/784—Arrangements for continuous movement of material wherein the material is moved using a tubular transport line, e.g. screw transport systems
Definitions
- the invention relates to a continuous furnace for the continuous heating of a pressed material mat, in particular in the course of the production of wood-based panels, with a tunnel-shaped housing through whose interior the pressed material mat can be guided and with one or more microwave generators for generating microwaves, which can be irradiated via one or more waveguides into the interior of the housing.
- Pressgutmatte means in the context of the invention preferably a mat or web of material (glued) particles, z.
- chips or fibers preferably wood chips or wood fibers in the course of the production of wood-based panels.
- wood chips or wood fibers usually sprinkled on a spreading belt conveyor or the like to form a Pressgutmatte and the pressed material mat thus produced then passes through a press, z.
- microwave radiation means electromagnetic radiation in a frequency range from 100 MHz to 300 GHz, preferably 300 MHz to 100 GHz.
- the microwave radiation is in one or more microwave generators, z. B. magnetrons, generated and radiated via waveguides in the interior of the housing or coupled.
- a continuous furnace for continuous preheating a pressed material mat of the type described above is z. B. from the EP 2 247 418 B1 known. Microwaves in a frequency range from 2400 to 2500 MHz are used for heating the pressed product mat, the microwaves for each press surface side from 20 to 300 microwave generators with magnetrons having a power of 3 to 50 KW being generated.
- the inlet and the outlet of the continuous furnace should be made variable in height and / or width.
- To change the inlet or outlet movable absorption elements may be provided, for. B. absorber stones and / or water tank.
- the German utility model DE 20 2015 102 422 U1 describes an apparatus for continuously heating materials of substantially non-metallic material, comprising a continuous furnace for continuously heating material on an endlessly circulating conveyor belt, wherein the continuous furnace a plurality of magnetrons for generating electromagnetic waves and waveguides with outlet openings for feeding the waves in has a radiation space.
- the main axes of the outlet openings form an angle greater than 0 ° and / or the line connecting the centers of gravity of the surfaces of the outlet openings form an angle of greater than 0 to the vertical to the direction of production.
- a microwave heating device which is designed in particular for ceramic materials and moldings and has a plurality of microwave generators for the radiation of microwaves with a frequency of 300 MHz to 5.8 GHz.
- the coupling of the high and low frequency microwaves is carried out via several in the ceiling and the bottom of the drying chamber recessed coupling elements. These should be slot antennas tuned to the output frequency.
- the arrangement of several field leaders in the ceiling area of the drying chamber is provided.
- the focus of the invention lies in the industrial drying of ceramic materials and mineral insulation materials.
- the invention has for its object to provide a continuous furnace, with which a Pressgutmatte, in particular for the production of wood-based panels, can be heated and preheated efficiently and economically.
- the invention teaches in a generic continuous furnace of the type described above that the waveguide or at least partially as a waveguide slot antenna (s) is / are formed, the (or) a slot antenna section, each with a plurality of outlet slots for have the coupling of the microwaves in the interior.
- Slot antenna section means a portion of the waveguide with respect to the longitudinal direction and thus a length of the waveguide.
- a waveguide is basically a known type Waveguide for electromagnetic waves (here: microwaves).
- the waveguide is designed as a metal tube with preferably rectangular (possibly also circular or elliptical) cross-section.
- Such waveguides are used in the prior art for transporting the microwaves generated in the microwave generator in the oven when the microwave generators are not directly connected to the housing.
- the invention proposes that the waveguides (at least in sections) are formed as waveguide slot antennas, each having a plurality having exit slots.
- the waveguide or the waveguide slot antenna is the end, namely closed at the end facing away from the microwave generator with an end wall. Consequently, the microwaves do not emerge from the waveguide on the face side, but they are emitted via the one longitudinal wall, the so-called antenna wall, of the waveguide slot antenna, namely through the outlet slots arranged there.
- the microwaves thus enter the waveguide or the waveguide slot antenna on the side facing the microwave generator and are reflected on the opposite closed end or end wall, so that a standing wave with the so-called waveguide wavelength is formed within the waveguide slot antenna, ie it is formed two oscillation bellies per waveguide wavelength.
- the resulting field is greatly disturbed by the slits introduced into an antenna wall and, due to this interference, the field exits the waveguide slot antenna and spreads out of it into the space, ie into the interior of the furnace.
- the invention has recognized that in the conventional irradiation on the frontally open waveguide upon entry of the microwaves in the interior reflections of the furnace housing occur and the radiation enters the interior in an undirected manner, so that uneven heating takes place.
- About the waveguide slot antenna is a directed irradiation of the pressed material mat, ie the registered amount of energy is directed to the Pressgutmatte and it reflections are avoided.
- the "illumination" of the pressed material mat is improved.
- Such slot antennas are known in communication technology in principle to address certain sectors of a service area evenly and selectively radio technology. The invention translates such considerations to the field of microwave heating of pressed stock mats for the woodworking industry.
- the waveguide slot antennas (each) have a rectangular cross-section.
- the waveguide slot antenna extends along a longitudinal direction such that the waveguide slot antenna forms a predetermined length of the waveguide, this slot antenna section having an antenna wall extending along the antenna's longitudinal direction in which the exit slits are disposed.
- the waveguide can therefore also have a (conventional) waveguide section without slots.
- the waveguide can consequently initially have a waveguide section without slots and a slot antenna section with slots adjoining it.
- the waveguide (with waveguide section and antenna section) can extend straight in one direction and with a substantially identical cross section.
- the waveguide section or a waveguide section extends in a different direction than the slot antenna section, so that a spatial deflection can take place within the waveguide. This is particularly useful when the arrangement of the microwave generators in the room requires this.
- the waveguide slot antennas protrude into the interior of the housing, i. H. they break through the housing wall. Consequently, the waveguides do not terminate with the entry into the housing, but extend through the housing wall and protrude into the housing as waveguide slot antennas, so that they are arranged above and / or below the pressed material mat and the pressed material mat is targeted from above and / or from below (directed) irradiate.
- the waveguide slot antennas may be connected to the housing on the outside or attached to the housing on the outside, so that the antenna wall is formed by a region of the housing or housing wall or the antenna wall forms part of the housing wall.
- the waveguide slot antennas (or the antenna section of the waveguides) run transversely to the direction of passage, i. They are arranged transversely to the furnace longitudinal direction.
- the longitudinal direction of the waveguide slot antenna thus extends transversely to the direction of passage of the furnace.
- the waveguide slot antennas are not arranged transversely to the passage direction, but parallel to the passage direction and thus oven longitudinal direction, so that the waveguide slot antennas extend with their longitudinal direction along the passage direction.
- waveguides themselves and in particular their waveguide slot antenna sections. or waveguide slot antennas preferably have a rectangular cross section, wherein preferably by the antenna wall (which has the slots) defined width of 1.5 times or 2.5 times, more preferably 2 times the height of the waveguide Slot antenna is.
- the waveguide slot antenna z.
- each row of slots preferably has a plurality of spaced-apart arranged slots.
- the two rows of slots are preferably offset and thus arranged at a distance from the center line of the waveguide slot antenna or the antenna wall.
- the individual slots of the two rows of slots along the longitudinal direction are preferably arranged offset from one another.
- the individual slots are preferably rectangular. You can have a length of z. B. 100 mm to 200 mm.
- the invention also provides a method for preheating a pressed material mat, in particular in the course of the production of wood-based panels, with a continuous furnace of the type described.
- This method is characterized in that the pressed material mat passed through the interior of the housing and with the waveguide slot antennas emerging microwaves irradiated while being heated.
- the use of such a continuous furnace for the preheating of (glued) wood-base mats in the course of the production of wood-based panels is therefore according to the invention of particular importance.
- the device is therefore preferably designed as a wood material mat heating device or preheating device.
- the continuous furnace itself can z. B. have a rectangular cross-section, so that the pressed material mat runs at a predetermined height through the rectangular interior.
- the waveguide slot antennas can - as already described - protrude transversely to the direction of passage into the interior or be placed on the interior, so that the pressed material mat z. B. is irradiated from above.
- the waveguide slot antennas may also be arranged parallel to the passage direction within the interior or be placed on the interior or on the housing. In this case, z.
- As the slots provided with the antenna wall a part of the upper housing wall, in which the waveguide slot antenna is attached directly to the upper housing wall. The irradiation can be done from the top to the top of the mat and / or from below to the bottom of the mat.
- the tunnel-shaped housing may alternatively be formed in cross-section and oval and z. B. have a width that is greater than the height. Even in such a case, the described options exist. If one such oval, z. B. elliptical housing, the slot antennas are attached to the outside of the housing, there is the possibility that the waveguide slot antennas follow the oval shape of the housing and are therefore formed curved itself along the longitudinal direction.
- the tunnel-shaped housing generally has not only a housing shell (with, for example, a rectangular or oval cross-section), but also an input-side end wall and an output-side end wall, which terminate the furnace on the input side and output side. Since the web to be heated is to be passed continuously through the continuous furnace, the input-side end wall and / or the output-side end wall on the one hand an input side opening on the other hand, an output side opening through which the continuous material web can enter the housing and exit from the housing.
- an input tunnel and, on the other hand, an output tunnel such an input tunnel or output tunnel generally having a significantly lower one Cross section or a significantly smaller cross-sectional area than the continuous furnace itself or the housing, so that the microwave losses are kept low through the entrance tunnel and the exit tunnel.
- the input tunnel and the output tunnel are constructed constructively, as well as waveguides which are made of an electrically conductive material (eg metal), wherein these tunnels are dimensioned with respect to width and height such that no or the smallest possible propagation occurs
- the microwave of the particular wavelength is made so that they work as it were "destructive" by the vibration modes of the microwaves are suppressed.
- Fig. 1 is simplified a plant for the production of wood-based panels presented in a continuous flow.
- the spreading material to be compacted for example wood fibers or wood chips
- a spreading belt conveyor 2 to form a spreading material mat 1.
- the spreading material mat 1 produced in this way is pressed in a continuously operating press 3 using pressure and heat to the wood-based panel (eg chipboard or fiberboard).
- Such Press 3 is generally designed as a double-belt press, which has an upper heating plate and a lower heating plate and endless press belts (eg steel press belts) in the upper press part and in the lower press part, these press belts with the interposition of rolling element aggregates (eg wooden bars). are supported on the press plates / heating plates.
- One of the heating plates or both heating plates are loaded with pressing cylinders, which are supported on the press frame (eg on press frame).
- a preheating of the pressed material mat 1 takes place with the aid of an in Fig. 1 merely indicated continuous furnace 4.
- the pressed material mat 1 consequently passes through the continuous furnace 4, which has a tunnel-shaped housing 5.
- the continuous furnace 4 a plurality of microwave generators 6, with which microwaves are generated, so that the material web 1 in the interior 7 of the housing 5 is applied and thus heated.
- the microwave generators 6 can be magnetrons or the generators can have such magnetrons.
- the microwave generators 6 are connected via waveguide 8 to the housing 5, so that the microwaves are irradiated via the waveguide 8 in the interior 7 of the housing.
- the tunnel-shaped housing 5 has a housing shell 10, which has a rectangular cross-section in the exemplary embodiment.
- the housing 5 has an input-side end wall 11 and an output-side end wall 12, the input-side end wall having an input-side opening 13 and the output-side end wall having an output-side opening 14 through which the pressed material mat 1 enters the housing 5 and exits from the housing 5 ,
- the input-side opening 13, an input tunnel 15 and to the output side Opening 14 an output tunnel 16 connected, with which the leakage of the microwaves are avoided or reduced from the housing interior.
- the entrance tunnel 15 and the exit tunnel 16 in the manner of waveguides as z. B. rectangular tubes may be formed, however, which are dimensioned such that the corresponding modes of the microwave rays are suppressed.
- the pressed material mat 1 passes through the continuous furnace 4 on a forming belt or conveyor belt 17, which consists of a non-conductive material, so that it can be easily passed through the microwave oven 4 during operation. In principle, this can be the same forming belt on which the pressed material mat is spread. However, it is also within the scope of the invention to provide a separate, endless circulating mold belt 17 for the continuous furnace, so that the previously sprinkled on a first mold belt 2 Pressgutmatte 1 is subsequently delivered to a second form 17 which passes through the continuous furnace 4.
- the waveguides 8 are formed, at least in sections, as waveguide slot antennas 8a, wherein these waveguide slot antennas 8a each have a plurality of outlet slots 9 for the coupling of the microwaves into the interior 7.
- the waveguides 8 have a waveguide section in a basically known manner, which is then followed by a slot antenna section to form the waveguide slot antenna 8a.
- the waveguide slot antenna 8a is thus a part of the waveguide 8, which defines the slot antenna section 8a of the waveguide 8, with respect to the longitudinal direction of the waveguide 8, the waveguide slot antenna 8a and the slot antenna section of the waveguide, respectively, having a length L, wherein in this longitudinal section with the length L, the outlet slots 9 are arranged.
- the outlet slots 9 are arranged in a wall, namely in the antenna wall 18.
- the waveguide or waveguide slot antennas 8a have a rectangular cross-section in the exemplary embodiment, wherein the antenna wall 18 with the outlet slots 9 (and the opposite wall) have a greater width B than the walls extending transversely thereto (which have a width or height H).
- the width B of the waveguide slot antenna (as well as the waveguide) in about 2 times the height H.
- the end wall 19 closes the waveguide slot antenna 8a at the microwave generator 6 opposite end of the waveguide 8. In this way forms itself in the waveguide 8 and in particular in the waveguide slot antenna 8a from a standing wave whose field is disturbed by the introduced into the antenna wall 18 slots 9 so that the microwaves directed through the slots 9 enter the interior of the furnace and the Pressgutmatte Heat 1.
- the waveguide slot antennas 8a protrude into the interior 7 of the housing 5 through the housing wall 10.
- the waveguide 8 thus collar with its antenna portion (which forms the waveguide slot antenna) by a predetermined amount ( eg, by the length L of the waveguide slot antenna) into the interior of the housing.
- the waveguide slot antennas 8a extend in the in Fig. 2 illustrated embodiment, transverse to the direction of passage D, which defines the furnace longitudinal direction. It can be seen that several waveguide slot antennas 8a (which run transversely to the passage direction) are arranged one behind the other along the passage direction D. A single one of these waveguide slot antennas is at Fig. 3 shown.
- the microwave field M is directed in a targeted manner onto the pressed material mat 1 from the exit slots.
- the slots 9 introduced into the antenna wall 18 of the slot antenna 8a are in FIG Fig. 4 shown. It can be seen that such a slot antenna 8a or its antenna wall 18 (at least) two parallel rows of slots 9 ', each having a plurality of spaced-apart slots 9 have.
- the two rows of slots 9 ' are arranged at a distance A from one another and the individual slots 9 of a row of slots 9' are arranged at a distance a one behind the other.
- the two rows of slots 9 ' are arranged offset from the center line X of the antenna wall 18, ie they have a distance V as an offset to the center line X.
- the slots 9 themselves are rectangular with a length I formed.
- Fig. 5 is simplified, a modified embodiment of the invention shown, in which the waveguide slot antenna 8a are not arranged transversely, but parallel through the direction of passage D so that they extend along the direction of passage. It is also possible here to project a plurality of waveguide slot antennas 8a, which are then preferably arranged transversely to the passage direction next to one another. This is in Fig. 5 not shown.
- the waveguide slot antennas 8a protrude through the housing shell 10 in the interior 7 of the housing 5, so that the waveguide slot antennas 8a have a separate housing 5 from the antenna housing.
- a modified embodiment is shown in simplified form, in which the waveguide slot antenna 8a is externally connected to the housing 5, so that the antenna wall 18 is formed by a portion of the housing 5 and the housing shell 10 and the antenna wall itself a part of the housing or the housing shell forms.
- the slots 9 are in this embodiment, as it were in the Housing shell 10 introduced.
- This can be z. B. realize that a cross-sectionally U-shaped metallic tube is attached to the side of the housing 5, 10 and placed so that together with the housing wall a waveguide with a rectangular cross section is formed, wherein the slots 9 are then introduced into the housing wall ,
- Such an embodiment can also be realized in a housing 5 that no rectangular cross-section, but z. B. has an oval cross section, wherein the waveguide slot antenna can then be curved and adapted to the outer circumference of the oval housing. This is not shown in the figures.
- Fig. 2 Incidentally, it can be seen that six microwave generators with six waveguides are provided, so that consequently six waveguide slot antennas protrude into the housing.
- Each microwave generator can produce a power of 100 KW.
- the Pressgutmatte can z. B. at a temperature of 20 ° C to 40 ° C, z. B. enter 35 ° C in the oven and at a temperature of 70 ° C to 100 ° C, z. B. preheated 80 ° to 90 ° C.
- each individual microwave generator 6 has a magnetron 20 and a Schumacher 15 and an anode voltage generator 22 and a cooling 23 and an insulator 24.
- a cooling and / or ventilation 25 is indicated for the oven.
- the irradiation takes place only from above, d. H.
- the slot antennas are located above the mat.
- waveguide slot antennas can also be arranged below the mat, with which the mat is irradiated from below.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Biotechnology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Waveguide Aerials (AREA)
- Furnace Details (AREA)
Abstract
Es handelt sich um einen Durchlaufofen (4) zur kontinuierlichen Erwärmung einer Pressgutmatte (1), insbesondere im Zuge der Herstellung von Holzwerkstoffplatten, mit einem tunnelförmigen Gehäuse (5), durch dessen Innenraum (7) die Pressgutmatte hindurchführbar ist und mit einem oder mehreren Mikrowellengeneratoren (6) zur Erzeugung von Mikrowellen, die über ein oder mehrere Hohlleiter (8) in den Innenraum (7) des Gehäuses einstrahlbar sind. Der Ofen ist dadurch gekennzeichnet, dass die Hohlleiter (8) zumindest abschnittsweise als Hohlleiter-Schlitzantennen (8a) ausgebildet sind, die jeweils mehrere Austrittsschlitze (9) für die Einkopplung der Mikrowellen in den Innenraum (7) aufweisen.It is a continuous furnace (4) for continuously heating a pressed material mat (1), in particular in the course of the production of wood-based panels, with a tunnel-shaped housing (5), through the interior (7) of the pressed material mat can be passed and with one or more microwave generators (6) for generating microwaves, which can be irradiated via one or more waveguides (8) in the interior (7) of the housing. The furnace is characterized in that the waveguides (8) are at least partially formed as waveguide slot antennas (8a), each having a plurality of outlet slots (9) for the coupling of the microwaves in the interior (7).
Description
Die Erfindung betrifft einen Durchlaufofen zur kontinuierlichen Erwärmung einer Pressgutmatte, insbesondere im Zuge der Herstellung von Holzwerkstoffplatten,
mit einem tunnelförmigen Gehäuse, durch dessen Innenraum die Pressgutmatte hindurchführbar ist und
mit einem oder mehreren Mikrowellengeneratoren zur Erzeugung von Mikrowellen, die über ein oder mehrere Hohlleiter in den Innenraum des Gehäuses einstrahlbar sind.The invention relates to a continuous furnace for the continuous heating of a pressed material mat, in particular in the course of the production of wood-based panels,
with a tunnel-shaped housing through whose interior the pressed material mat can be guided and
with one or more microwave generators for generating microwaves, which can be irradiated via one or more waveguides into the interior of the housing.
Pressgutmatte meint im Rahmen der Erfindung bevorzugt eine Matte bzw. Materialbahn aus (beleimten) Partikeln, z. B. Spänen oder Fasern, bevorzugt Holzspänen oder Holzfasern im Zuge der Herstellung von Holzwerkstoffplatten. Dabei werden die Partikel, z. B. Holzspäne oder Holzfasern in der Regel auf einen Streubandförderer oder dergleichen unter Bildung einer Pressgutmatte aufgestreut und die so erzeugte Pressgutmatte durchläuft anschließend eine Presse, z. B. eine kontinuierlich arbeitende Doppelbandpresse, in welcher die Pressgutmatte unter Anwendung von Druck und/oder Wärme zu einer (Holzwerkstoff-)Platte bzw. Plattenstrang verpresst wird. Zur Optimierung des Pressprozesses erfolgt eine Vorwärmung des Pressgutes bzw. der Pressgutmatte, und zwar im Rahmen der Erfindung mit Hilfe einer Pressgutmatten-Vorwärmeinrichtung, die als Durchlaufofen ausgebildet ist. Die Pressgutmatte wird folglich mit Hilfe von Mikrowellenstrahlung vorgewärmt. Mikrowellenstrahlung meint dabei erfindungsgemäß elektromagnetische Strahlung in einem Frequenzbereich von 100 MHz bis 300 GHz, bevorzugt 300 MHz bis 100 GHz. Die Mikrowellenstrahlung wird in einem oder mehreren Mikrowellengeneratoren, z. B. Magnetronen, erzeugt und über Hohlleiter in den Innenraum des Gehäuses eingestrahlt bzw. eingekoppelt.Pressgutmatte means in the context of the invention preferably a mat or web of material (glued) particles, z. As chips or fibers, preferably wood chips or wood fibers in the course of the production of wood-based panels. The particles, z. As wood chips or wood fibers usually sprinkled on a spreading belt conveyor or the like to form a Pressgutmatte and the pressed material mat thus produced then passes through a press, z. B. a continuously operating double belt press in which the pressed material mat is pressed using pressure and / or heat to a (wood material) plate or strand of sheet. To optimize the pressing process, a preheating of the material to be pressed or the pressed material mat takes place, in the context of the invention with the aid of a pressed material mat preheating device, which is designed as a continuous furnace. The Pressgutmatte is therefore preheated by means of microwave radiation. According to the invention, microwave radiation means electromagnetic radiation in a frequency range from 100 MHz to 300 GHz, preferably 300 MHz to 100 GHz. The microwave radiation is in one or more microwave generators, z. B. magnetrons, generated and radiated via waveguides in the interior of the housing or coupled.
Ein Durchlaufofen zum kontinuierlichen Vorwärmen einer Pressgutmatte der eingangs beschriebenen Art ist z. B. aus der
In der
Das deutsche Gebrauchsmuster
Im Übrigen kennt man aus der
Der Erfindung liegt die Aufgabe zugrunde, einen Durchlaufofen zu schaffen, mit dem sich eine Pressgutmatte, insbesondere für die Herstellung von Holzwerkstoffplatten, effizient und wirtschaftlich erwärmen bzw. vorwärmen lässt.The invention has for its object to provide a continuous furnace, with which a Pressgutmatte, in particular for the production of wood-based panels, can be heated and preheated efficiently and economically.
Zur Lösung dieser Aufgabe lehrt die Erfindung bei einem gattungsgemäßen Durchlaufofen der eingangs beschriebenen Art, dass der bzw. die Hohlleiter zumindest abschnittsweise als Hohlleiter-Schlitzantenne(n) ausgebildet ist/sind, der bzw. die (jeweils) einen Schlitzantennenabschnitt mit jeweils mehreren Austrittsschlitzen für die Einkopplung der Mikrowellen in den Innenraum aufweisen. Schlitzantennenabschnitt meint dabei einen Abschnitt des Hohlleiters bezogen auf die Längsrichtung und folglich einen Längenabschnitt des Hohlleiters. Bei einem Hohlleiter handelt es sich in grundsätzlich bekannter Weise um einen Wellenleiter für elektromagnetische Wellen (hier: Mikrowellen). Der Hohlleiter ist als Metallrohr mit bevorzugt rechteckigem (ggf. auch kreisförmigem oder elliptischem) Querschnitt ausgebildet. Solche Hohlleiter werden beim Stand der Technik für den Transport der in dem Mikrowellengenerator erzeugten Mikrowellen in dem Ofen verwendet, wenn die Mikrowellengeneratoren nicht unmittelbar an das Gehäuse angeschlossen sind. Während die Mikrowellen beim Stand der Technik in der Regel aus den stirnseitig offenen Enden der Hohlleiter austreten und in den Innenraum des Ofens eingestrahlt werden, schlägt die Erfindung vor, dass die Hohlleiter (zumindest abschnittsweise) als Hohlleiter-Schlitzantennen ausgebildet sind, welche jeweils eine Vielzahl von Austrittsschlitzen aufweisen. Bevorzugt ist der Hohlleiter bzw. die Hohlleiterschlitzantenne endseitig, und zwar an dem dem Mikrowellengenerator abgewandten Ende mit einer Stirnwand verschlossen. Die Mikrowellen treten folglich nicht stirnseitig aus dem Hohlleiter aus, sondern sie werden über die eine Längswand, die sogenannten Antennenwand, der Hohlleiter-Schlitzantenne abgestrahlt, und zwar durch die dort angeordneten Austrittsschlitze. Die Mikrowellen treten folglich auf der dem Mikrowellengenerator zugewandten Seite in den Hohlleiter bzw. in die Hohlleiterschlitzantenne ein und werden auf dem gegenüberliegenden geschlossenen Ende bzw. der Stirnwand reflektiert, so dass sich innerhalb der Hohlleiterschlitzantenne eine stehende Welle mit der sogenannten Hohlleiterwellenlänge ausbildet, d. h. es entstehen zwei Schwingungsbäuche je Hohlleiterwellenlänge. Das auf diese Weise entstehende Feld wird über die in eine Antennenwand eingebrachten Schlitze stark gestört und durch diese Störung tritt das Feld aus der Hohlleiter-Schlitzantenne aus und breitet sich von diesen in den Raum aus, d. h. in den Innenraum des Ofens.To solve this problem, the invention teaches in a generic continuous furnace of the type described above that the waveguide or at least partially as a waveguide slot antenna (s) is / are formed, the (or) a slot antenna section, each with a plurality of outlet slots for have the coupling of the microwaves in the interior. Slot antenna section means a portion of the waveguide with respect to the longitudinal direction and thus a length of the waveguide. A waveguide is basically a known type Waveguide for electromagnetic waves (here: microwaves). The waveguide is designed as a metal tube with preferably rectangular (possibly also circular or elliptical) cross-section. Such waveguides are used in the prior art for transporting the microwaves generated in the microwave generator in the oven when the microwave generators are not directly connected to the housing. While the microwaves in the prior art usually emerge from the frontally open ends of the waveguide and are irradiated into the interior of the furnace, the invention proposes that the waveguides (at least in sections) are formed as waveguide slot antennas, each having a plurality having exit slots. Preferably, the waveguide or the waveguide slot antenna is the end, namely closed at the end facing away from the microwave generator with an end wall. Consequently, the microwaves do not emerge from the waveguide on the face side, but they are emitted via the one longitudinal wall, the so-called antenna wall, of the waveguide slot antenna, namely through the outlet slots arranged there. The microwaves thus enter the waveguide or the waveguide slot antenna on the side facing the microwave generator and are reflected on the opposite closed end or end wall, so that a standing wave with the so-called waveguide wavelength is formed within the waveguide slot antenna, ie it is formed two oscillation bellies per waveguide wavelength. The resulting field is greatly disturbed by the slits introduced into an antenna wall and, due to this interference, the field exits the waveguide slot antenna and spreads out of it into the space, ie into the interior of the furnace.
Dabei hat die Erfindung erkannt, dass bei der herkömmlichen Einstrahlung über die stirnseitig offene Hohlleiter beim Eintritt der Mikrowellen in den Innenraum des Ofengehäuses Reflexionen entstehen und die Strahlung ungerichtet in den Innenraum eintritt, so dass eine ungleichmäßige Erwärmung erfolgt. Über die Hohlleiter-Schlitzantenne erfolgt eine gerichtete Bestrahlung der Pressgutmatte, d. h. die eingetragene Energiemenge wird auf die Pressgutmatte gelenkt und es werden Reflexionen vermieden. Die "Ausleuchtung" der Pressgutmatte wird verbessert. Solche Schlitzantennen sind aus der Kommunikationstechnik grundsätzlich bekannt, um bestimmte Sektoren eines Versorgungsbereichs gleichmäßig und gezielt funktechnisch anzusprechen. Die Erfindung überträgt derartige Überlegungen auf den Bereich der Mikrowellenerwärmung von Pressgutmatten für die Holzwerkstoffindustrie. Bevorzugt weisen die Hohlleiter-Schlitzantennen (jeweils) einen rechteckigen Querschnitt auf. Die Hohlleiter-Schlitzantenne erstreckt sich entlang einer Längsrichtung, so dass die Hohlleiter-Schlitzantenne einen vorgegebenen Längenabschnitt des Hohlleiters bildet, wobei dieser Schlitzantennenabschnitt eine sich entlang der Antennenlängsrichtung erstreckende Antennenwand aufweist, in welcher die Austrittsschlitze angeordnet sind. Der Hohlleiter kann folglich außerdem über einen (herkömmlichen) Hohlleiterabschnitt ohne Schlitze verfügen. Ausgehend von dem Mikrowellengenerator kann der Hohlleiter folglich zunächst einen Hohlleiterabschnitt ohne Schlitze und einen sich daran anschließenden Schlitzantennenabschnitt mit Schlitzen aufweisen. Der Hohlleiter (mit Hohlleiterabschnitt und Antennenabschnitt) kann sich dabei gerade in einer Richtung und mit im Wesentlichen identischen Querschnitt erstrecken. Es liegt jedoch ebenfalls im Rahmen der Erfindung, dass sich der Hohlleiterabschnitt oder ein Hohlleiterschnitt in einer anderen Richtung erstreckt als der Schlitzantennenabschnitt, so dass innerhalb des Hohlleiters eine räumliche Umlenkung erfolgen kann. Dieses ist insbesondere dann zweckmäßig, wenn die Anordnung der Mikrowellengeneratoren im Raum dieses erfordert.In this case, the invention has recognized that in the conventional irradiation on the frontally open waveguide upon entry of the microwaves in the interior reflections of the furnace housing occur and the radiation enters the interior in an undirected manner, so that uneven heating takes place. About the waveguide slot antenna is a directed irradiation of the pressed material mat, ie the registered amount of energy is directed to the Pressgutmatte and it reflections are avoided. The "illumination" of the pressed material mat is improved. Such slot antennas are known in communication technology in principle to address certain sectors of a service area evenly and selectively radio technology. The invention translates such considerations to the field of microwave heating of pressed stock mats for the woodworking industry. Preferably, the waveguide slot antennas (each) have a rectangular cross-section. The waveguide slot antenna extends along a longitudinal direction such that the waveguide slot antenna forms a predetermined length of the waveguide, this slot antenna section having an antenna wall extending along the antenna's longitudinal direction in which the exit slits are disposed. The waveguide can therefore also have a (conventional) waveguide section without slots. Starting from the microwave generator, the waveguide can consequently initially have a waveguide section without slots and a slot antenna section with slots adjoining it. The waveguide (with waveguide section and antenna section) can extend straight in one direction and with a substantially identical cross section. However, it is also within the scope of the invention that the waveguide section or a waveguide section extends in a different direction than the slot antenna section, so that a spatial deflection can take place within the waveguide. This is particularly useful when the arrangement of the microwave generators in the room requires this.
In einer bevorzugten Ausführungsform ragen die Hohlleiter-Schlitzantennen (d. h. die Antennenabschnitte der Hohlleiter) in den Innenraum des Gehäuses hinein, d. h. sie durchbrechen die Gehäusewand. Die Hohlleiter enden folglich nicht mit dem Eintritt in das Gehäuse, sondern sie erstrecken sich durch die Gehäusewand hindurch und ragen als Hohlleiter-Schlitzantennen in das Gehäuse hinein, so dass sie oberhalb und/oder unterhalb der Pressgutmatte angeordnet sind und die Pressgutmatte gezielt von oben und/oder von unten (gerichtet) bestrahlen.In a preferred embodiment, the waveguide slot antennas (i.e., the antenna sections of the waveguides) protrude into the interior of the housing, i. H. they break through the housing wall. Consequently, the waveguides do not terminate with the entry into the housing, but extend through the housing wall and protrude into the housing as waveguide slot antennas, so that they are arranged above and / or below the pressed material mat and the pressed material mat is targeted from above and / or from below (directed) irradiate.
In einer alternativen Ausgestaltung können die Hohlleiter-Schlitzantennen außenseitig an das Gehäuse angeschlossen sein bzw. außenseitig an das Gehäuse angesetzt sein, so dass die Antennenwand von einem Bereich des Gehäuses bzw. der Gehäusewand gebildet wird bzw. die Antennenwand einen Teil der Gehäusewand bildet.In an alternative embodiment, the waveguide slot antennas may be connected to the housing on the outside or attached to the housing on the outside, so that the antenna wall is formed by a region of the housing or housing wall or the antenna wall forms part of the housing wall.
In einer Ausführungsform der Erfindung verlaufen die Hohlleiter-Schlitzantennen (bzw. der Antennenabschnitt der Hohlleiter) quer zur Durchlaufrichtung, d. h.sie sind quer zur Ofenlängsrichtung angeordnet. Die Längsrichtung der Hohlleiter-Schlitzantenne erstreckt sich folglich quer bzw. senkrecht zur Durchlaufrichtung des Ofens. Bei einer solchen Ausführungsform ist es zweckmäßig, wenn mehrere Hohlleiter-Schlitzantennen hintereinander angeordnet sind.In one embodiment of the invention, the waveguide slot antennas (or the antenna section of the waveguides) run transversely to the direction of passage, i. They are arranged transversely to the furnace longitudinal direction. The longitudinal direction of the waveguide slot antenna thus extends transversely to the direction of passage of the furnace. In such an embodiment, it is expedient if a plurality of waveguide slot antennas are arranged one behind the other.
Alternativ liegt es im Rahmen der Erfindung, dass die Hohlleiter-Schlitzantennen nicht quer zur Durchlaufrichtung, sondern parallel zur Durchlaufrichtung und folglich Ofenlängsrichtung angeordnet sind, so dass sich die Hohlleiter-Schlitzantennen mit ihrer Längsrichtung entlang der Durchlaufrichtung erstrecken. Bei einer solchen Ausführungsform ist es zweckmäßig, wenn mehrere Hohlleiter-Schlitzantennen quer zur Durchlaufrichtung nebeneinander angeordnet sind, so dass auch hier eine Bestrahlung der Pressgutmatte mit mehreren Hohlleiter-Schlitzantennen erfolgt.Alternatively, it is within the scope of the invention that the waveguide slot antennas are not arranged transversely to the passage direction, but parallel to the passage direction and thus oven longitudinal direction, so that the waveguide slot antennas extend with their longitudinal direction along the passage direction. In such an embodiment, it is expedient if a plurality of waveguide slot antennas side by side transversely to the passage direction are arranged so that there is also an irradiation of the pressed material mat with a plurality of waveguide slot antennas.
Die Hohlleiter selbst und insbesondere deren Hohlleiter-Schlitzantennenabschnitte. bzw. Hohlleiter-Schlitzantennen weisen bevorzugt einen rechteckigen Querschnitt auf, wobei vorzugsweise die durch die Antennenwand (welche die Schlitze aufweist) definierte Breite das 1,5-fache bzw. 2,5-fache, besonders bevorzugt das 2-fache der Höhe der Hohlleiter-Schlitzantenne beträgt.The waveguides themselves and in particular their waveguide slot antenna sections. or waveguide slot antennas preferably have a rectangular cross section, wherein preferably by the antenna wall (which has the slots) defined width of 1.5 times or 2.5 times, more preferably 2 times the height of the waveguide Slot antenna is.
Die Hohlleiter-Schlitzantenne, z. B. deren Antennenwand, weist bevorzugt zumindest zwei parallel zueinander verlaufende, beabstandete Schlitzreihen auf, wobei jede Schlitzreihe bevorzugt mehrere hintereinander beabstandete angeordnete Schlitze aufweist. Die beiden Schlitzreihen sind dabei bevorzugt versetzt und folglich mit Abstand zur Mittellinie der Hohlleiter-Schlitzantenne bzw. der Antennenwand angeordnet. Außerdem sind die einzelnen Schlitze der beiden Schlitzreihen entlang der Längsrichtung bevorzugt versetzt zueinander angeordnet. Diesbezüglich wird auf die Figurenbeschreibung verwiesen.The waveguide slot antenna, z. As the antenna wall, preferably has at least two mutually parallel, spaced rows of slots, each row of slots preferably has a plurality of spaced-apart arranged slots. The two rows of slots are preferably offset and thus arranged at a distance from the center line of the waveguide slot antenna or the antenna wall. In addition, the individual slots of the two rows of slots along the longitudinal direction are preferably arranged offset from one another. In this regard, reference is made to the description of the figures.
Die einzelnen Schlitze sind bevorzugt rechteckig ausgebildet. Sie können eine Länge von z. B. 100 mm bis 200 mm aufweisen.The individual slots are preferably rectangular. You can have a length of z. B. 100 mm to 200 mm.
Insgesamt kann im Rahmen der Erfindung in Abhängigkeit von der Ofengeometrie und der Mattengeometrie eine vielfältige Abstimmung bzw. Auslegung der Hohlleiter-Schlitzantennen hinsichtlich Hohlleitergeometrie und Schlitzgeometrie erfolgen, und zwar unter Berücksichtigung der jeweiligen Mikrowellenlänge. Mit Hilfe von Simulationen kann eine Optimierung erfolgen, so dass vor allem Reflexionen beim Eintritt in das Innere des Ofens vermieden werden und eine gleichmäßige gezielte Ausleuchtung der Pressgutmatte (z. B. von oben und/oder von unten) erfolgen.Overall, in the context of the invention, depending on the furnace geometry and the mat geometry, a diverse coordination or design of the waveguide slot antennas with respect to waveguide geometry and slot geometry, taking into account the respective microwave length. With the help of simulations, an optimization can be carried out, so that in particular reflections are avoided when entering the interior of the furnace and a uniform targeted illumination of the pressed material mat (eg from above and / or from below).
Gegenstand der Erfindung ist auch ein Verfahren zur Vorwärmung einer Pressgutmatte, insbesondere im Zuge der Herstellung von Holzwerkstoffplatten, mit einem Durchlaufofen der beschriebenen Art. Dieses Verfahren ist dadurch gekennzeichnet, dass die Pressgutmatte durch den Innenraum des Gehäuses hindurchgeführt und mit den aus den Hohlleiter-Schlitzantennen austretenden Mikrowellen bestrahlt und dabei erwärmt wird. Der Verwendung eines solchen Durchlaufofens für die Vorwärmung von (beleimten) Holzwerkstoff-Matten im Zuge der Herstellung von Holzwerkstoffplatten kommt folglich erfindungsgemäß besondere Bedeutung zu. Die Vorrichtung ist folglich bevorzugt als Holzwerkstoffmatten-Erwärmungseinrichtung bzw. Vorwärmungseinrichtung ausgebildet. Der Durchlaufofen selbst kann z. B. einen rechteckförmigen Querschnitt aufweisen, so dass die Pressgutmatte in vorgegebener Höhe durch den rechteckförmigen Innenraum läuft. Die Hohlleiter-Schlitzantennen können - wie bereits beschrieben - quer zur Durchlaufrichtung in den Innenraum ragen oder auf den Innenraum aufgesetzt werden, so dass die Pressgutmatte z. B. von oben bestrahlt wird. Alternativ können die Hohlleiter-Schlitzantennen auch parallel zur Durchlaufrichtung innerhalb des Innenraums angeordnet sein oder auf den Innenraum bzw. auf das Gehäuse aufgesetzt sein. In diesem Fall bildet z. B. die mit den Schlitzen versehene Antennenwand einen Teil der oberen Gehäusewand, in dem die Hohlleiter-Schlitzantenne unmittelbar an die obere Gehäusewand angesetzt ist. Die Bestrahlung kann von oben auf die Oberseite der Matte und/oder von unten auf die Unterseite der Matte erfolgen.The invention also provides a method for preheating a pressed material mat, in particular in the course of the production of wood-based panels, with a continuous furnace of the type described. This method is characterized in that the pressed material mat passed through the interior of the housing and with the waveguide slot antennas emerging microwaves irradiated while being heated. The use of such a continuous furnace for the preheating of (glued) wood-base mats in the course of the production of wood-based panels is therefore according to the invention of particular importance. The device is therefore preferably designed as a wood material mat heating device or preheating device. The continuous furnace itself can z. B. have a rectangular cross-section, so that the pressed material mat runs at a predetermined height through the rectangular interior. The waveguide slot antennas can - as already described - protrude transversely to the direction of passage into the interior or be placed on the interior, so that the pressed material mat z. B. is irradiated from above. Alternatively, the waveguide slot antennas may also be arranged parallel to the passage direction within the interior or be placed on the interior or on the housing. In this case, z. As the slots provided with the antenna wall, a part of the upper housing wall, in which the waveguide slot antenna is attached directly to the upper housing wall. The irradiation can be done from the top to the top of the mat and / or from below to the bottom of the mat.
Das tunnelförmige Gehäuse kann alternativ im Querschnitt auch oval ausgebildet sein und z. B. eine Breite aufweisen, die größer als die Höhe ist. Auch in einem solchen Fall bestehen die beschriebenen Optionen. Sofern bei einem solchen ovalen, z. B. ellipsenförmigen Gehäuse die Schlitzantennen außenseitig an das Gehäuse angesetzt sind, besteht die Möglichkeit, dass die Hohlleiter-Schlitzantennen der ovalen Gehäuseform folgen und folglich selbst entlang der Längsrichtung gekrümmt ausgebildet sind.The tunnel-shaped housing may alternatively be formed in cross-section and oval and z. B. have a width that is greater than the height. Even in such a case, the described options exist. If one such oval, z. B. elliptical housing, the slot antennas are attached to the outside of the housing, there is the possibility that the waveguide slot antennas follow the oval shape of the housing and are therefore formed curved itself along the longitudinal direction.
Das tunnelförmige Gehäuse weist in der Regel nicht nur einen Gehäusemantel (mit z. B. rechteckigem oder ovalem Querschnitt auf), sondern außerdem eine eingangsseitige Stirnwand sowie eine ausgangsseitige Stirnwand, welche den Ofen eingangsseitig und ausgangsseitig abschließen. Da die zu erwärmende Materialbahn kontinuierlich durch den Durchlaufofen hindurchgeführt werden soll, weisen die eingangsseitige Stirnwand und/oder die ausgangsseitige Stirnwand einerseits eine eingangsseitige Öffnung andererseits eine ausgangsseitige Öffnung auf, durch welche die durchlaufende Materialbahn in das Gehäuse eintreten und aus dem Gehäuse austreten kann. Um Verluste im Bereich dieser Öffnungen zu vermeiden bzw. zu reduzieren, ist es zweckmäßig, an die eingangsseitige Öffnung und/oder an die ausgangsseitige Öffnung einerseits einen Eingangstunnel und andererseits einen Ausgangstunnel anzuschließen, wobei ein solcher Eingangstunnel bzw. Ausgangstunnel in der Regel einen deutlich geringeren Querschnitt bzw. eine deutlich geringere Querschnittsfläche aufweist, als der Durchlaufofen selbst bzw. dessen Gehäuse, so dass die Mikrowellenverluste durch den Eingangstunnel und den Ausgangstunnel hindurch gering gehalten werden. Es sind der Eingangstunnel und der Ausgangstunnel in der Regel konstruktiv sowie Hohlleiter ausgebildet, die aus einem elektrisch leitenden Material (z. B. Metall) gefertigt sind, wobei diese Tunnel hinsichtlich Breite und Höhe so dimensioniert sind, dass keine bzw. eine möglichst geringe Ausbreitung der Mikrowellen der bestimmten Wellenlänge erfolgt, so dass sie gleichsam "destruktiv" arbeiten, indem die Schwingungsmoden der Mikrowellen unterdrückt werden.The tunnel-shaped housing generally has not only a housing shell (with, for example, a rectangular or oval cross-section), but also an input-side end wall and an output-side end wall, which terminate the furnace on the input side and output side. Since the web to be heated is to be passed continuously through the continuous furnace, the input-side end wall and / or the output-side end wall on the one hand an input side opening on the other hand, an output side opening through which the continuous material web can enter the housing and exit from the housing. In order to avoid or reduce losses in the region of these openings, it is expedient to connect to the input-side opening and / or to the output-side opening, on the one hand, an input tunnel and, on the other hand, an output tunnel, such an input tunnel or output tunnel generally having a significantly lower one Cross section or a significantly smaller cross-sectional area than the continuous furnace itself or the housing, so that the microwave losses are kept low through the entrance tunnel and the exit tunnel. As a rule, the input tunnel and the output tunnel are constructed constructively, as well as waveguides which are made of an electrically conductive material (eg metal), wherein these tunnels are dimensioned with respect to width and height such that no or the smallest possible propagation occurs The microwave of the particular wavelength is made so that they work as it were "destructive" by the vibration modes of the microwaves are suppressed.
Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen
- Fig. 1
- eine Vorrichtung zur Herstellung von Holzwerkstoffplatten mit einem Durchlaufofen in einer stark vereinfachten Seitenansicht,
- Fig. 2
- einen erfindungsgemäßen Durchlaufofen der Vorrichtung nach
Fig. 1 in einer vereinfachten perspektivischen Darstellung, - Fig. 3
- eine Hohlleiter-Schlitzantenne im Bereich der zu erwärmenden Pressgutmatte,
- Fig. 4
- die Schlitzwand einer Hohlleiter-Schlitzantenne in einer Draufsicht,
- Fig. 5
- eine abgewandelte Ausführungsform des Gegenstandes nach
Fig. 3 , - Fig. 6
- ein schematisch vereinfachtes Funktionsdiagramm eines erfindungsgemäßen Durchlaufofens,
- Fig. 7
- eine abgewandelte Ausführungsform eines erfindungsgemäßen Durchlaufofens.
- Fig. 1
- a device for producing wood-based panels with a continuous furnace in a greatly simplified side view,
- Fig. 2
- a continuous furnace according to the invention the device according to
Fig. 1 in a simplified perspective view, - Fig. 3
- a waveguide slot antenna in the region of the pressed material mat to be heated,
- Fig. 4
- the slot wall of a waveguide slot antenna in a plan view,
- Fig. 5
- a modified embodiment of the article according to
Fig. 3 . - Fig. 6
- a schematically simplified functional diagram of a continuous furnace according to the invention,
- Fig. 7
- a modified embodiment of a continuous furnace according to the invention.
In
Um den Pressprozess innerhalb der Presse 3 zu optimieren, erfolgt im Rahmen der Erfindung eine Vorwärmung der Pressgutmatte 1 mit Hilfe eines in
Das tunnelförmige Gehäuse 5 weist einen Gehäusemantel 10 auf, der im Ausführungsbeispiel einen rechteckigen Querschnitt besitzt. Außerdem weist das Gehäuse 5 eine eingangsseitige Stirnwand 11 und eine ausgangsseitige Stirnwand 12 auf, wobei die eingangsseitige Stirnwand eine eingangsseitige Öffnung 13 und die ausgangsseitige Stirnwand eine ausgangsseitige Öffnung 14 aufweisen, durch welche die Pressgutmatte 1 in das Gehäuse 5 einläuft und aus dem Gehäuse 5 austritt. Dabei sind in dem dargestellten Ausführungsbeispiel an die eingangsseitige Öffnung 13 ein Eingangstunnel 15 und an die ausgangsseitige Öffnung 14 ein Ausgangstunnel 16 angeschlossen, mit denen das Austreten der Mikrowellen aus dem Gehäuseinnenraum vermieden bzw. reduziert werden. Dazu können der Eingangstunnel 15 und der Ausgangstunnel 16 nach Art von Hohlleitern als z. B. rechteckige Rohre ausgebildet sein, die jedoch derart dimensioniert sind, dass die entsprechenden Moden der Mikrowellenstrahlen unterdrückt werden.The tunnel-shaped
Die Pressgutmatte 1 durchläuft den Durchlaufofen 4 auf einem Formband bzw. Transportband 17, welches aus einem nichtleitenden Material besteht, so dass es unproblematisch durch den Mikrowellenofen 4 während des Betriebs hindurchgeführt werden kann. Dabei kann es sich grundsätzlich um dasselbe Formband handeln, auf das die Pressgutmatte aufgestreut wir. Es liegt jedoch ebenso im Rahmen der Erfindung, ein separates, endlos umlaufendes Formband 17 für den Durchlaufofen vorzusehen, so dass die zuvor auf ein erstes Formband 2 aufgestreute Pressgutmatte 1 anschließend an ein zweites Formblatt 17 abgegebenen wird, welches den Durchlaufofen 4 durchläuft. Erfindungsgemäß sind die Hohlleiter 8 zumindest abschnittsweise als Hohlleiter-Schlitzantennen 8a ausgebildet, wobei diese Hohlleiter-Schlitzantennen 8a jeweils mehrere Austrittsschlitze 9 für die Einkopplung der Mikrowellen in den Innenraum 7 aufweisen. In den Figuren ist erkennbar, dass die Hohlleiter 8 in grundsätzlich bekannter Weise einen Hohlleiterabschnitt aufweisen, an den sich dann ein Schlitzantennenabschnitt unter Bildung der Hohlleiter-Schlitzantenne 8a anschließt. Die Hohlleiter-Schlitzantenne 8a ist folglich bezogen auf die Längsrichtung des Hohlleiters 8 ein Teil bzw. ein Abschnitt des Hohlleiters 8, welcher den Schlitzantennenabschnitt 8a des Hohlleiters 8 definiert, wobei die Hohlleiter-Schlitzantenne 8a bzw. der Schlitzantennenabschnitt des Hohlleiters eine Länge L aufweist, wobei in diesem Längenabschnitt mit der Länge L die Austrittsschlitze 9 angeordnet sind. Dabei sind die Austrittsschlitze 9 in einer Wand, nämlich in der Antennenwand 18 angeordnet. Die Hohlleiter bzw. Hohlleiter-Schlitzantennen 8a weisen dabei im Ausführungsbeispiel einen rechteckigen Querschnitt auf, wobei die Antennenwand 18 mit den Austrittsschlitzen 9 (und deren gegenüberliegende Wand) eine größere Breite B als die quer dazu verlaufenden Wände aufweisen (die eine Breite bzw. Höhe H aufweisen). Im Ausführungsbeispiel beträgt die Breite B der Hohlleiter-Schlitzantenne (wie auch der Hohlleiter) in etwas das 2-fache der Höhe H. Die Stirnwand 19 verschließt die Hohlleiter-Schlitzantenne 8a an dem dem Mikrowellengenerator 6 gegenüberliegenden Ende des Hohlleiters 8. Auf diese Weise bildet sich in dem Hohlleiter 8 und insbesondere in der Hohlleiter-Schlitzantenne 8a eine stehende Welle aus, deren Feld durch die in die Antennenwand 18 eingebrachten Schlitze 9 gestört wird, so dass die Mikrowellen über die Schlitze 9 gerichtet in den Innenraum des Ofens eintreten und die Pressgutmatte 1 erwärmen.The pressed material mat 1 passes through the
In dem in
In
In der in den
In
In
In
Bei der dargestellten Ausführungsform erfolgt die Bestrahlung nur von oben, d. h. die Schlitzantennen sind oberhalb der Matte angeordnet. Alternativ oder ergänzend können jedoch auch unterhalb der Matte Hohlleiter-Schlitzantennen angeordnet sein, mit denen die Matte von unten bestrahlt wird.In the illustrated embodiment, the irradiation takes place only from above, d. H. the slot antennas are located above the mat. Alternatively or additionally, however, waveguide slot antennas can also be arranged below the mat, with which the mat is irradiated from below.
Claims (13)
mit einem tunnelförmigen Gehäuse (5), durch dessen Innenraum (7) die Pressgutmatte hindurchführbar ist und
mit einem oder mehreren Mikrowellengeneratoren (6) zur Erzeugung von Mikrowellen, die über ein oder mehrere Hohlleiter (8) in den Innenraum (7) des Gehäuses einstrahlbar sind,
dadurch gekennzeichnet, dass die Hohlleiter (8) zumindest abschnittsweise als Hohlleiter-Schlitzantennen (8a) ausgebildet sind, die jeweils mehrere Austrittsschlitze (9) für die Einkopplung der Mikrowellen in den Innenraum (7) aufweisen.Continuous furnace (4) for continuous heating of a pressed material mat (1), in particular in the course of the production of wood-based panels,
with a tunnel-shaped housing (5) through whose interior (7) the pressed material mat can be passed and
with one or more microwave generators (6) for generating microwaves, which can be irradiated via one or more waveguides (8) into the interior (7) of the housing,
characterized in that the waveguides (8) are at least partially formed as waveguide slot antennas (8a), each having a plurality of outlet slots (9) for the coupling of the microwaves in the interior (7).
die Pressgutmatte durch den Innenraum des Gehäuses hindurchgeführt und mit den aus den Hohlleiter-Schlitzantennen austretenden Mikrowellen bestrahlt und dabei erwärmt wird.A method for preheating a pressed material mat, in particular in the course of the production of wood-based panels, with a continuous furnace according to one of claims 1 to 12, characterized in that
the Pressgutmatte passed through the interior of the housing and irradiated with the emerging from the waveguide slot antennas microwaves and thereby heated.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016119463.8A DE102016119463A1 (en) | 2016-10-12 | 2016-10-12 | Continuous furnace for continuous heating of a pressed material mat |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3310130A2 true EP3310130A2 (en) | 2018-04-18 |
EP3310130A3 EP3310130A3 (en) | 2018-05-16 |
EP3310130B1 EP3310130B1 (en) | 2022-08-03 |
Family
ID=59895137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17191051.6A Active EP3310130B1 (en) | 2016-10-12 | 2017-09-14 | Continuous furnace for the continuous heating of a compressed material mat |
Country Status (4)
Country | Link |
---|---|
US (1) | US20180099431A1 (en) |
EP (1) | EP3310130B1 (en) |
CN (1) | CN107932685B (en) |
DE (1) | DE102016119463A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11559070B2 (en) * | 2017-05-09 | 2023-01-24 | Gea Mechanical Equipment Gmbh | Apparatus and method to heat animal raw fat material to produce fat |
US11007681B2 (en) * | 2018-09-24 | 2021-05-18 | Toyota Motor Engineering & Manufacturing North America, Inc. | Microwave applicator with pressurizer for planar material heating |
DE102019112634B3 (en) * | 2019-05-14 | 2020-10-15 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Device for the continuous heating of a pressed material mat |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4160145A (en) * | 1978-02-16 | 1979-07-03 | Armstrong Cork Company | Microwave applicator device |
DE69206736T2 (en) * | 1991-09-27 | 1996-05-30 | Apv Uk Plc | Microwave heating devices |
US5756975A (en) | 1996-11-21 | 1998-05-26 | Ewes Enterprises | Apparatus and method for microwave curing of resins in engineered wood products |
DE19847299C1 (en) * | 1997-09-05 | 2000-03-16 | Linn High Therm Gmbh | Pass-through microwave oven has height adjustable base plate, air outlet holes next to radiation windows, air regulators, microwave guide and distribution devices for each window |
JP3717403B2 (en) * | 1998-02-19 | 2005-11-16 | フラマトム アンプ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Microwave sintering method and apparatus for nuclear fuel |
AU5242400A (en) * | 1999-06-21 | 2001-01-09 | Andrzej Marek Klemarewski | System and method for making compressed wood product |
DE102004052871A1 (en) * | 2004-11-02 | 2006-05-04 | Heinrich Kuper Gmbh & Co Kg | Device and method for connecting thin, flat elements |
CN101297169A (en) * | 2005-09-22 | 2008-10-29 | 伊斯曼化学公司 | Microwave reactor having a slotted array waveguide coupled to a waveguide bend |
EP2100479B1 (en) | 2006-12-06 | 2011-02-02 | Fricke und Mallah Microwave Technology GmbH | Microwave heater |
CN201134509Y (en) * | 2007-10-31 | 2008-10-15 | 中国电子科技集团公司第三十八研究所 | Wideband double L shaped waveguide narrow rim gap array antenna |
DE102007063374A1 (en) * | 2007-12-30 | 2009-07-02 | Dieffenbacher Gmbh + Co. Kg | Method and device for preheating a pressed material mat in the course of the production of wood-based panels |
CN100589944C (en) * | 2008-06-13 | 2010-02-17 | 昆明理工大学 | Method of treating fire retardant wood using microwave |
CN201397880Y (en) * | 2009-05-22 | 2010-02-03 | 中国电子科技集团公司第三十八研究所 | Wave-guide slot array in frequency-selective wideband |
JP5486382B2 (en) * | 2010-04-09 | 2014-05-07 | 古野電気株式会社 | Two-dimensional slot array antenna, feeding waveguide, and radar apparatus |
JP5606238B2 (en) * | 2010-09-17 | 2014-10-15 | 東光株式会社 | Dielectric waveguide slot antenna |
CN102107454A (en) * | 2010-11-30 | 2011-06-29 | 陈滔 | Continuous hot-pressing method for large-section section |
CN202241520U (en) * | 2011-09-21 | 2012-05-30 | 福建省永安林业(集团)股份有限公司 | Medium density fiberboard production device utilizing microwave preheating |
CN102335947A (en) * | 2011-09-21 | 2012-02-01 | 福建省永安林业(集团)股份有限公司 | Method for preparing medium density fiberboard by using microwave to pre-heat |
JP2014035983A (en) * | 2012-08-10 | 2014-02-24 | Nisshin:Kk | Microwave processing method |
KR102009701B1 (en) * | 2012-08-23 | 2019-08-12 | 엔티엔 가부시키가이샤 | Waveguide tube slot antenna and wireless device provided therewith |
EP2920533B1 (en) * | 2012-11-16 | 2018-06-20 | NuWave Research Inc. | Apparatus and method for dehydration using microwave radiation |
JP2018501455A (en) * | 2014-10-27 | 2018-01-18 | コーニング インコーポレイテッド | System and method for drying skinned ceramic ware using recycled microwave radiation |
DE202015102422U1 (en) | 2015-05-11 | 2016-08-15 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Apparatus for continuous heating of material |
DE102016110808A1 (en) * | 2016-06-13 | 2017-12-14 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Process for the continuous heating of a material web and continuous furnace |
-
2016
- 2016-10-12 DE DE102016119463.8A patent/DE102016119463A1/en not_active Withdrawn
-
2017
- 2017-09-14 EP EP17191051.6A patent/EP3310130B1/en active Active
- 2017-10-11 US US15/730,104 patent/US20180099431A1/en not_active Abandoned
- 2017-10-11 CN CN201710937244.6A patent/CN107932685B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107932685A (en) | 2018-04-20 |
EP3310130B1 (en) | 2022-08-03 |
US20180099431A1 (en) | 2018-04-12 |
EP3310130A3 (en) | 2018-05-16 |
CN107932685B (en) | 2020-09-18 |
DE102016119463A1 (en) | 2018-04-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102016110808A1 (en) | Process for the continuous heating of a material web and continuous furnace | |
EP2247418B1 (en) | Method and device for preheating a pressed material mat during manufacture of wood material boards | |
DE2722356C2 (en) | Method and device for the continuous production of chipboard, fiber or the like. plates | |
DE10157601B4 (en) | Device for heating pressed material in the manufacture of material plates | |
EP3310130B1 (en) | Continuous furnace for the continuous heating of a compressed material mat | |
DE19718772A1 (en) | Procedure for manufacture of derived timber product board, such as chip board or fibre board | |
DE2232065C3 (en) | Microwave heating device | |
EP1815201A1 (en) | Multistage continuous microwave dryer for plate-shaped products, especially fiber boards | |
EP0767891A1 (en) | Device for heat treating products by microwave radiation | |
WO2014195450A1 (en) | Plant, microwave tunnel kiln and method for the continuous production of materials, preferably of material boards | |
WO2016180886A1 (en) | Apparatus and method for continuous prouction of materials | |
DE102015107380B4 (en) | Device for continuous heating of material | |
DE202015102417U1 (en) | Apparatus for the continuous production of materials | |
DE202015102422U1 (en) | Apparatus for continuous heating of material | |
EP2527144B1 (en) | Method and device for hot pressing component stacks fitted with adhesive for producing sandwich lightweight boards with integrated wood frame core | |
EP2767389B1 (en) | Double strip heating press | |
DE102018105385B4 (en) | Continuous furnace and plant for the production of wood-based panels | |
DE102018105390B4 (en) | Continuous furnace and plant for the production of wood-based panels | |
DE102017104064B4 (en) | Process for operating a continuous furnace and continuous furnace | |
DE2908470C2 (en) | Device for the discontinuous production of chipboard, fiberboard or similar panels | |
DE202017104748U1 (en) | Preheating device for a continuous press | |
DE102017118016A1 (en) | Preheating device for a continuous press and method for preheating a pressed material mat | |
DE102018133294A1 (en) | Device and method for the continuous heating of a pressed material mat | |
DE202013102450U1 (en) | Plant and microwave continuous furnace for the continuous production of materials, preferably of material plates | |
DE10361837A1 (en) | Continual process and assembly to manufacture chipboard from e.g. sawdust, wood shavings or wood chips |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H05B 6/78 20060101AFI20180406BHEP Ipc: H05B 6/70 20060101ALI20180406BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20180622 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20200415 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20220322 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1509794 Country of ref document: AT Kind code of ref document: T Effective date: 20220815 Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502017013550 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20221205 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20221103 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20221203 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20221104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502017013550 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20220930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220914 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
26N | No opposition filed |
Effective date: 20230504 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20221103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220930 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220914 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221003 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20221103 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1509794 Country of ref document: AT Kind code of ref document: T Effective date: 20220914 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230928 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220914 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20170914 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220803 |