Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0254—After-treatment
  • B05D3/0263—After-treatment with IR heaters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
  • B27K3/02—Processes; Apparatus
  • B27K3/0207—Pretreatment of wood before impregnation
  • B27K3/0214—Drying
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
  • B27K3/02—Processes; Apparatus
  • B27K3/0228—Spraying apparatus, e.g. tunnels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
  • B27K3/02—Processes; Apparatus
  • B27K3/025—Controlling the process
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
  • B27K3/16—Inorganic impregnating agents
  • B27K3/166—Compounds of phosphorus
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
  • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
  • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
  • F26B15/122—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate
• • 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
  • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
  • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
• • 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
  • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
  • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
  • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
  • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
  • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
  • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
  • B05B7/32—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the fed liquid or other fluent material being under pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
  • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2252/00—Sheets
  • B05D2252/04—Sheets of definite length in a continuous process
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K2240/00—Purpose of the treatment
  • B27K2240/30—Fireproofing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
  • F26B2210/14—Veneer, i.e. wood in thin sheets

Definitions

• the present invention relates to a system for fire retardant impregnation of veneers and other types of wooden plates/boards, which system comprises a first weighing system, which system comprises a first humidity sensor for performing a first meas- urement of humidity in plates, which system comprises a spraying device for spraying with a chemical composition, which system comprises a second weighing system, which system comprises veneers and other types of wooden plates/boards.
• US 7,736,549 discloses a chemical composition to be applied to materials to impart flame retardancy.
• the composition includes a mixture of ingredients that is not harm ful to humans or the environment.
• the ingredients of the composition can include a phosphorous containing material, an acidic material, a material that serves as a pre- servative, and an aqueous solvent.
• fire retardant can also be used to impregnate the dif ferent types of wood.
• US3935341 A disclose a system in which system wood can be rendered fire resistant by impregnating the wood with a solution of a monomer, such as a phenol, and a fire- inhibiting salt, drying the wood and thereafter treating the wood with a solution of a second monomer, such as formaldehyde, polymer rizable with the first monomer. Heating to dryness causes polymerization of the monomers. The fire resi stant proper ties of wood treated this way are not affected by exposure to moisture. Prior to the first impregnation, after the first impregnation and after treatment with the second monomer the wood being treated is dried to a moisture content below about 4 percent.
• a monomer such as a phenol
• a fire- inhibiting salt such as formaldehyde
• the object can be fulfilled by a system as disclosed in the preamble to clam 1 and further modified in that the spraying device comprises a plurality of spray nozzles placed over (and dependent on purpose also under) the type of wood, which system comprises a drying module for performing a drying process (with drying panels placed over (and dependent on purpose also under) the type of wood), which system com prises of various measuring sensors throughout the entire process line.
• spraying is performed by a plurality of soft spray ing nozzles.
• the pressure in the nozzles has to be kept adjustable in order not to per- form any harm at the wood surfaces (varies across types of wood). All the surfaces have to be covered by the spraying as the chemical composition will penetrate the surface of the plate and penetrate the open cells in the wood and thereby perform a highly effective impregnation. Further, a drying process is performed in order to re Jerusalem humidity which has been used as carrier for the chemical composition.
• the humidity is being removed in the drying process and leaving the chemical composition inside the cells of the wood. Both during and after the impregnation pro cess further measures can be made to ensure the right intake and humidity level. In that way it is possible to control the amount of the chemical composition that is occu-file by the plate in the wood cells.
• the system comprises one or more com- puters, which computers receive input from e.g. roller bans including a weighing sys- tem, from a humidity sensor, from a spraying device, from the drying module.
• computers receive input from e.g. roller bans including a weighing sys- tem, from a humidity sensor, from a spraying device, from the drying module.
• the computers can perform docu- mentation from at least processes performed by the system.
• different kind of documentation can be achieved by the computer system.
• Quality documentation can be transmitted to a customer so that the quality documentation is achieved long time before the lot of wood which has been sent through the process.
• the system comprises a conveyor system for transporting plates through the system.
• Each of the different modules com prises a conveyor system inside the single modules, e.g. in the drying module there is a conveyor and also in the spraying module there is a conveyor. Further, in the drying process there is further a conveyor inside the module.
• the conveyor system comprises at least the first, second and third weighing system.
• the system comprises one or more video cameras for video inspection of plates before and after the processes.
• an automatic control of the plates can be performed by camera technology before and after the process.
• video control it is possible to find differ ent kind of cracks or other failures in plates before the process is started. In some situ- ations there can be some cracks that are so critical that the plate has to be removed immediately; then there is no need for sending a plate through the process.
• the video inspection afterwards could also indicate failures in the plate, because the plate has been sent through a drying process, has been sprayed with a chemical composition, probably together with water and hereafter a new drying process, it is possible that some cracks could occur in plates and they thereafter have to be removed from the production lot. Further, it is possible for the computer system to have pictures of each single plate that has been sent through the system.
• the system can receive a mixture of water and chemical composition from a water source such as a tank and from a tank for the chemical composition, which water tank comprises a first pump, which tank for the chemical composition comprises a second pump, which first pump is via a first flow measuring device connected to a mixer, which second pump is via a second flow measuring device connected to the mixer, from which mixer the liquid flows through a aerometer, from which aerometer the liquid flows through lines and to the nozzles.
• a water source such as a tank and from a tank for the chemical composition
• which water tank comprises a first pump
• tank for the chemical composition comprises a second pump
• first pump is via a first flow measuring device connected to a mixer
• second pump is via a second flow measuring device connected to the mixer, from which mixer the liquid flows through a aerometer, from which aerometer the liquid flows through lines and to the nozzles.
• the invention is described as a method for operating a system for fire retardant impregnation of different types of wood in the following steps of operation: a. perform measurement of weight of the plates, b. perform measurement of humidity in the plates, c. perform drying on one or both sides of the type of wood, d. perform spraying of a chemical composition from one or both sides of the types of wood, e. remove liquid drops from the surfaces of the types of wood, f. perform a drying process on one or both sides of the types of wood, g. perform measurement of weight of the types of wood.
• the method as disclosed it is possible to perform impregnation of the types of wood where at first the humidity content of the plate is measured together with the weight of the plate and drying is performed. After drying and the control of the hu- midity in the type of wood the spraying process can be performed by a plurality of nozzles placed over and/or under the plate during a conveyor movement through the process. After spraying a new weighing measure should be performed.
• drying performed which could be performed in different ways. It is possible in a rela- tive short machine by infrared light to perform the drying. Another possibility will be a very long machine where hot air can perform the drying. After the drying process the weight is controlled once again. If the humidity is well-known before together with the increasing weight, it is then an indication for the intake of the chemical com position. Because all these results from the different sensor systems are sent to a com puter it is possible to perform full documentation for the method.
• the composition can include a phosphorous con taining material, an acidic material, a material that serves as a preservative and an aqueous solvent as disclosed in US 7,736,549. Other compositions are also possible.
• a new and more efficient and effective solution for impregnation into veneers for plywood production in a high-quality can be achieved.
• the system can provide the desired intake of impregnation into the veneers.
• the impregnated veneers can leave the system with an average humidity of 3-5%.
• the system will be able to document the intake in the veneer and thereby optimize the use of impregnation and at the same time ensure a constant surveillance of the quality.
• the process line can treat both top veneers as well as core and scarf jointed ve neers. Both solve existing challenges with fire retarding top veneer on plywood boards as well as optimizing the use of veneers (inch core and scarf jointed veneers) in fire retardant plywood.
• a possible production line is composed by:
• the purpose of the spray system is to ensure a uniform intake of impregnation, ac cording to the specified quantity, by means of a (double sided) spray system, spraying the type of wood while being conveyed through the spray machine.
• One possible drying process can be performed by a CIR-oven emits infrared radiation, having a wavelength of 2-10 pm, transferring energy into the veneer material, which has reception properties corresponding to a wavelength of 6-8 pm. By utilizing the above-mentioned energy transfer properties, it is possible to speed the drying process.
• the invention consists of different units.
• the units can be combined in differ ent ways depending on the condition and type of the wood, the required treatment
• Example 1 Roller unit - Spray unit - Roller unit - Drying unit - Roller unit
• Example 3 Roller ban - Drying unit - Roller ban - Spray unit - Roller ban - Drying unit - Roller ban
• Veneer thin slices of wood (typically peeled from logs). The veneer is usually thinner than 3 mm.
• Green veneer Fresh veneer just peeled from a log and still containing humidi- ty ⁇
• Plywood consists of three or more layers of veneer. Normally, each is glued with its grain at right angles to adjacent layers for strength.
• Wood is a natural material and as such not uniform. Some of the differences are:
• the first version of Spray-CIR oven is composed by a unique process, where first the veneers can be weighed, and the moisture can be measured before entry in the spray. The process can be followed by an impregnation using a spray machine. After im pregnation, the veneers can be weighed again to control ire-retardant intake. Then they are followed to a CIR-oven, where the veneers are dried. After the drying process, veneers are weighed again and the moisture at the end of the process is controlled.
• the spray and CIR-oven can be two separate lines. In future, one line may however still be possible.
• Veneers can be weighed and the moisture can be measured before entry in the spray. The process can be followed by an impregnation using a spray machine. Then, the veneers can be weighed to control fire-retardant intake. Veneers can be weighted by lots before and after. It is not a requirement to weigh veneer by veneer.
• Veneers can be dried inside the CIR-oven.
• the moisture can be controlled by weigh after the drying process and compare the data with previous information obtained in the spray process.
• a blower can be installed after the spray process to remove the excess of fire-retardant in the following steps in the system, and to have a more accuracy in the weigh after being impregnated.
• the process line can be adjusted and thereby optimized to achieve the desired perfor mance.
• Fig. 1 shows a possible embodiment of the invention in a schematic view.
• Fig. 2 shows a spraying device
• Fig. 3 shows a conveyor system 38.
• Fig. 4 shows one possible heating device for drying of the plates.
• Fig. 5 shows a spraying device connected by a conveyor towards a drying device.
• Fig. 6 shows a conveyor.
• Fig. 7 shows an enlarged view of the drying module.
• Fig. 8 shows a possible embodiment of the invention in a schematic view.
• Fig. 9 shows a possible embodiment for a spray line.
• Fig. 10 shows a separated spray device.
• Fig. 11 shows a possible embodiment for a drying module.
• Fig. 1 shows a possible embodiment of the invention in a schematic view.
• a number of plates 4 which are placed at a first weighing system 6, further there is a second weighing system 12 and a third weighing system 24.
• the weighing systems are integrated in a conveyor 38, which is indicated during the process.
• Fur ther, humidity sensors 8 are indicated. There could be more humidity sensors in the system.
• a drying unit 10 which by drying is removing humidity of the plates 4 before they are sent further in the process.
• the second weighing system 12 also placed together with the conveyor 38 is weighing the plate 4 once again and probably once again humidity is measured.
• Fig. 2 shows a spraying device 14, which comprises a plurality of nozzles, which are able to perform a soft spraying at the plates 4 when they are sent through by an inter nal conveyor. Because the soft spraying takes place both from top and below the plate, it will in that way be totally covered with a liquid, which contains the chemical com position 16. Because the plate is relative dry before the process is starting, the chemi cal composition will penetrate the surface and take up open space in the wood cells because the chemical composition is solved in water.
• the spraying process is a con tinuously process where plate after plate can be sent through the spraying device.
• Fig. 3 shows a conveyor system 38.
• Fig. 4 shows one possible heating device for drying the plates.
• the heating device 20 as disclosed here is a CIR-oven that emits infrared radiation having a wavelength of 2- 10 pm and the material of the plate has reception properties corresponding to a wave length of 6-8 pm.
• a highly effective heating and drying can be performed.
• Fig. 5 shows a spraying device 14 connected by a conveyor 38 towards a drying de vice 20 as previously disclosed.
• Fig. 6 shows a conveyor 38.
• Fig. 7 shows an enlarged view of the drying module 20.
• Fig. 8 shows a possible embodiment for the system 2.
• a plate 4 partly passing through a spraying device 14, which comprises spray nozzles 18.
• Fur- ther is indicated a water tank 44 and a tank 46 for the chemical composition 16.
• the water tank 44 comprises a pump 48 and the tank 46 for the chemical composition 16 comprises a pump 50.
• the pump 48 is by a line connected to a flow measuring device 52 and the pump 50 is by a line connected to a flow measuring device 54.
• the flow measuring devices 52 and 54 are combined in a mixer 56, which mixer 56 is further connected to an aerometer/conductivitymeter 58, from which there are further lines 60 and 62, which are connecting the nozzles 18.
• Fig. 9 discloses a possible embodiment for a spray line. Veneers 4 are weighed, and the moisture is measured before entry in the spray device 14. The process is followed by an impregnation using a spray device 14. Then, the veneers 4 are weighed to con trol fire-retardant intake. Veneers 4 can be weighted by lots before and after. It is not a requirement to weigh veneer by veneer.
• Fig. 10 discloses a separated spray device 14 where the spray and CIR-oven can be two separate lines. In future, one line may however still be possible.
• Veneers 4 are weighed, and the moisture is measured before entry in the spray device 14. The pro- cess is followed by an impregnation using a spray device 14. Then, the veneers 4 are weighed to control fire-retardant intake. Veneers 4 can be weighted by lots before and after. It is not a requirement to weigh veneer by veneer.
• Fig. 11 discloses a possible embodiment for drying module 20 such as a CIR oven comprising blower means.
• Veneers 4 are weighed, and the moisture is measured be- fore entry in the spray device 14. The process is followed by an impregnation using a spray machine. Then, the veneers 4 are weighed to control fire-retardant intake. Ve- neers can be weighted by lots before and after. It is not a requirement to weigh veneer by veneer.

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• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Microbiology (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Combustion & Propulsion (AREA)
• Chemical And Physical Treatments For Wood And The Like (AREA)

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• 2018
  • 2018-12-19 RU RU2020123687A patent/RU2020123687A/ru unknown
  • 2018-12-19 WO PCT/DK2018/050377 patent/WO2019120421A1/en unknown
  • 2018-12-19 EP EP18893192.7A patent/EP3727771A4/de not_active Withdrawn

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