System and method for preparing coated wood material compression-moulded bodies

Abstract

The invention relates to a system (1) for preparing coated wood material compression-moulded bodies (100) to form scatterable particles, comprising: a comminuting device (2) for the contact-based comminuting of coated wood material compression-moulded bodies (100) into wood material compression-moulded body fragments with coating-containing wood material compression-moulded body fragments and coating-free wood material compression-moulded body fragments; a riser-pipe air classifier (3) for classification into a bad fraction (31) with predominantly coating-containing wood material compression-moulded body fragments and a good fraction (32) with predominantly coating-free wood material compression-moulded body fragments; an intake device (4) for the weight-dependent and / or time-dependent supplying of the riser-pipe air classifier (3) with wood material compression-moulded body fragments, wherein the intake device (4) comprises a weighing device for the gravimetric determination of the supplying of the riser-pipe air classifier (3) per time unit, wherein the riser-pipe air classifier (3) is downstream of the comminuting device (2) and the intake device (4) is arranged between the riser-pipe air classifier (3) and the comminuting device (2).

Description

[0001] Title: Plant and process for the processing of coated

[0002] Wood-based molded bodies

[0003] Description

[0004] The invention relates to a system, a riser tube classifier, as well as a method for processing, in particular reprocessing, coated wood-based molded bodies.

[0005] Numerous systems and processes for processing coated wood-based molded parts are known from the prior art. For example, in so-called wet processes, coated wood-based molded parts and / or fragments thereof are processed in an aqueous medium and / or with steam and / or pressure and / or temperature, in particular by being broken down.

[0006] Problematic aspects of the processes known from the state of the art, especially wet processes for the preparation of coated wood-based molded bodies, are usually complex and costly systems and processes, with coating components, especially binder components, such as aqueous phases contaminated with adhesives, with complex water circulation, elaborate chemical and cleaning processes and disposal problems.

[0007] The invention is therefore based on the objective of providing a system, a riser tube classifier, and a method for processing, in particular reprocessing, coated wood-based molded parts, especially for separating coated wood-based molded part fragments from uncoated wood-based molded part fragments. Furthermore, an alternative to wet processes is to be provided.

[0008] To solve the problem, the invention, according to a first embodiment, teaches a

[0009] 1. Plant for processing, in particular reprocessing, coated wood-based molded bodies, for example with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, most preferably in the range of 10 to 25%, into free-flowing particles, in particular 240044P10WO Description 2025-09-15

[0010] comprising fibrous material particles: a comminution device for the contact comminution of coated wood-based molded bodies into wood-based molded body fragments containing coatings and uncoated wood-based molded body fragments; a riser tube air classifier for classification, in particular of the wood-based molded body fragments obtained from the comminution device, into a defective fraction with predominantly coated wood-based molded body fragments and a good fraction with predominantly uncoated wood-based molded body fragments; a feeding device for the weight- and / or time-dependent feeding of the riser tube air classifier with wood-based molded body fragments, in particular from the comminution device.wherein the feeding device comprises a weighing device for gravimetrically determining the feed rate of the riser tube air classifier per unit of time, wherein the riser tube air classifier is downstream of the comminution device and the feeding device is arranged between the riser tube air classifier and the comminution device, in particular the comminution device is functionally connected to the feeding device and the riser tube air classifier, for example fluidically, in particular product flow-wise.

[0011] Within the scope of the present invention, "wood-based material molded parts" are understood to mean molded parts, in particular molded components, such as molded panels made of materials, especially materials in the solid state, from which, for example, components and structures can be manufactured. The molded parts comprise a fiber component, in particular a wood component, for example, a wood chip component, a wood wool component, a wood fiber component, a C4 plant component, a CAM plant component, or a combination thereof. For example, wood-based material molded parts are selected from a group consisting of plywood, in particular according to DIN 68705 (DIN EN 636), particleboard, in particular according to DIN EN 309, according to DIN 68763 (DIN EN 312), wood fiberboard, in particular according to DIN 68754. 240044P10WO Description 2025-09-15

[0012] (DIN EN 622), for example HDF boards (high-density fiberboard), MDF boards (medium-density fiberboard), ULDF boards (ultra-lightweight fiberboard), particleboard, in particular chipboard strips, OSB boards (oriented strand board), for example according to DIN EN 300, LSL board (chipboard strips), composite boards, in particular WPC boards (wood plastic composites), linoleum, lightweight boards, for example paper honeycomb boards, glued laminated timber, laminated veneer lumber or a combination thereof.

[0013] Within the scope of the present invention, CAM plant component is understood to mean a component of plants with a crassulacean acid metabolism.

[0014] Within the scope of the present invention, "coating," and in particular "coating," refers to the application of a firmly adhering layer, especially of amorphous material, for example, a coating material, and in particular additionally with an adhesion promoter, to a surface of the wood-based molded body. For example, a coating material and / or adhesion promoter is selected from a group of resins, in particular condensation resins, for example, aminoplasts, in particular melamine-formaldehyde resins, thermosetting plastics, in particular phenol-formaldehyde resins, or a combination thereof.

[0015] Within the scope of the present invention, a contact comminution device is understood to be a comminution device which is suitable for touching the material to be comminuted, in particular for having contact with the material to be comminuted during the comminution process. For example, a contact comminution device may be selected from the group consisting of a hammer mill, in particular a vertical hammer mill, a horizontal hammer mill, a surface mill, a pin mill, an impact mill, in particular a double-stream mill, for example Palimann type PSKM, Palimann type PPSM, a percussion mill or a combination thereof.

[0016] A riser tube air classifier within the scope of the present invention is understood to be a classifier which, according to the basic principle of stream classification, uses a separation medium selected from a group of gases, gas mixtures, in particular air, fluids, or a combination thereof. 240044P10WO Description 2025-09-15

[0017] In a riser-tube air classifier according to the invention, the particles to be classified are fed into a tube, in particular a riser tube, through which air flows from below, in particular from the ground. Particles that have a lower settling velocity than the classifying air velocity are discharged upwards, in particular against the direction of gravity, as fines, in particular good fraction; particles with a higher settling velocity pass through the classifier downwards, in particular in the direction of gravity, as coarses, in particular bad fraction.

[0018] According to the invention, a riser tube air classifier can, for example, be selected from a group consisting of a gravity classifier, in particular a circular classifier, a zigzag classifier, a floating classifier, a cascade classifier or a combination thereof.

[0019] Within the scope of the present invention, classification is understood to mean separation according to a separation criterion into at least two fractions, in particular into a good fraction and a bad fraction. According to the invention, air classification with a riser tube air classifier is understood to be a stream classification using air and / or other gases and / or gas mixtures and / or fluids or a combination thereof as the separation medium.

[0020] According to the invention, an entry device can, for example, be selected from a group consisting of a conveyor belt, in particular a conveyor belt scale, a transport belt, a weighing belt, a transport screw, in particular a weighing screw, a rotary valve or a combination thereof.

[0021] Advantages of the system according to the invention include its simplicity, in particular its low complexity, its small footprint, its environmental friendliness, in particular its recycling potential, for example, the processing, in particular the reprocessing of coated wood-based molded bodies, in particular fiberboards, and its low energy consumption, in particular due to the lack of additional complex equipment, in particular steam and / or water processing plants and / or chemical dosing devices or a combination thereof.

[0022] 2. Plant according to the first embodiment 1, wherein the plant additionally includes a sieving device, in particular a vibrating sieve for 240044P10WO Description 2025-09-15

[0023] The sorting of the wood-based material molded body fragments obtained from the comminution device into an oversize fraction, a feed fraction and a screen fraction, wherein the comminution device is upstream of the screen device, in particular upstream in the (process) flow direction, for example upstream in the (process) material flow direction, and the feed device for receiving the feed fraction is downstream of the screen device, in particular downstream in the (process) flow direction, for example downstream in the (process) material flow direction.

[0024] Within the scope of the invention, the terms "upstream" and "downstream" are to be understood as relating to the flow direction, in particular the process direction, for example the main process direction, in particular the (good material) flow direction.

[0025] 3. Plant according to one of the first embodiments 1 to 2, wherein the plant additionally comprises a non-contact comminution device, wherein the non-contact comminution device is upstream of the comminution device for the contact comminution of coated wood-based molded bodies.

[0026] Within the scope of the present invention, a non-contact, and in particular non-contact, shredding device is understood to be a shredding device which does not touch the material to be shredded, in particular does not touch it mechanically, for example, has no contact with the material to be shredded. For example, a non-contact shredding device can be selected from a group consisting of a sonic shock wave shredder, in particular an EcoPulser, a wave vane shredder, or a combination thereof.

[0027] An advantage of the additional use of a non-contact comminution device according to the invention is the ability to remove fiber components, in particular individual fibers from wood-based molded bodies, with as little damage as possible, ideally while maintaining fiber length and / or fiber quality, for example the strength potential.

[0028] 4. Plant according to one of the first embodiments 1 to 3, wherein the riser pipe air classifier comprises: a riser pipe with a light material discharge opening for discharging the material fraction with predominantly coating-free

[0029] wood-based molded body fragments, an air inlet element with a converging side, in particular a converging side and a diverging side, wherein the air inlet element is arranged with the converging side on the riser pipe, wherein the air inlet element comprises a coarse material discharge device for discharging the defective fraction with predominantly coating-containing wood-based molded body fragments, in particular the coarse material discharge device seals the air inlet element at the bottom, in particular closes it off at the bottom, an air volume flow supply device for supplying the riser pipe with an air volume flow in the direction from the side facing away from the light material discharge opening to the side of the riser pipe facing the light material discharge opening, wherein the air volume flow supply device is functionally connected to the air inlet element and is designed in such a way,that the riser pipe inside can be supplied with the air volume flow uniformly from the side facing away from the light material discharge opening via the air inlet element in the direction of the side facing the light material discharge opening, an inlet pipe for supplying the riser pipe air classifier, wherein the inlet pipe projects at least partially into the riser pipe on the side of the light material discharge opening.

[0030] 5. System according to the first embodiment 4, wherein the air inlet element comprises air supply openings arranged circumferentially, in particular radially, and wherein the

[0031] The air volume flow supply device is designed such that the riser pipe 240044P10WO description 2025-09-15 can be supplied with the air volume flow via the arranged air supply openings.

[0032] Within the scope of the present invention, the air supply openings are selected from the group of geometric shapes consisting of a circle, in particular an ellipse, a polygon, in particular a dodecagon, a hendecagon, a decagon, a nonagon, an octagon, a heptagon, a hexagon, a pentagon, a tetragon, a trigon or a combination thereof.

[0033] 6. Plant according to one of the first embodiments 4 to 5, wherein the riser pipe in the area of ​​the feed pipe which projects at least partially into the riser pipe comprises at least partially a conical area, wherein the conical area tapers, in particular conically towards the light material discharge opening.

[0034] 7. System according to the first embodiment 6, wherein the riser pipe comprises a riser pipe expansion, in particular a radially circumferential riser pipe expansion, as a transition into the conical area.

[0035] Within the scope of the present invention, a riser pipe expansion is understood to mean an expansion of the riser pipe, in particular an enlargement, for example a bulging of the riser pipe.

[0036] 8. System according to one of the first embodiments 4 to 7, wherein the riser pipe expansion has an inner cross-sectional area in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4 with respect to the inner cross-sectional area of ​​the riser pipe.

[0037] 9. System according to one of the first embodiments 4 to 8, wherein the air inlet element on the diverging side has a

[0038] The internal cross-sectional area is in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8, based on the internal cross-sectional area of ​​the riser pipe. 240044P10WO Description 2025-09-15

[0039] 10. System according to one of the first embodiments 4 to 9, wherein the inlet pipe has an inner cross-sectional area in the range of 0.2 to 0.85, preferably in the range of 0.35 to 0.7, particularly preferably in the range of 0.45 to 0.6, based on the inner cross-sectional area of ​​the riser pipe.

[0040] 11. System according to one of the first embodiments 4 to 10, wherein the conical section together with the riser pipe expansion has a height in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25, based on the height of the riser pipe without the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.

[0041] 12. System according to one of the first embodiments 4 to 11, wherein the air inlet element has a height in the range of 0.2 to 0.7, preferably in the range of 0.25 to 0.65, particularly preferably in the range of 0.3 to 0.45, based on the height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.

[0042] 13. System according to one of the first embodiments 4 to 12, wherein the inlet pipe has a height in the range of 0.7 to 1, preferably in the range of 0.75 to 0.95, particularly preferably in the range of 0.8 to 0.9, based on the height of the sum of the heights of the conical section together with the riser pipe expansion.

[0043] 14. System according to one of the first embodiments 4 to 13, wherein the inlet pipe has a height in the range of 1 to 1.15, preferably in the range of 1.001 to 1.10, particularly preferably in the range of 1.002 to 1.005, based on the height of the riser pipe excluding the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.

[0044] An advantage of the cross-sectional and / or length ratios according to the invention is the formability, in particular the design, for example, of a suspended turbulence layer within the riser pipe, wherein the position, 240044P10WO Description 2025-09-15, for example, the height within the riser pipe is adjustable, in particular controllable, and thus the separation sharpness can be actively influenced, in particular optimally adjustable.

[0045] 15. Plant according to one of the first embodiments 4 to 14, wherein the riser tube air classifier additionally comprises a funnel element with a wide end and a narrow end, wherein the funnel element is arranged between the air inlet element and the coarse material discharge device, wherein the wide end of the funnel element is connected to the diverging side of the air inlet element and the narrow end of the funnel element is connected to the coarse material discharge device.

[0046] 16. Plant according to one of the first embodiments 1 to 15, wherein the plant additionally comprises a moisture sensor unit for measuring the moisture content of the input material, in particular the wood-based molded body fragments in the riser tube air classifier for additional moisture-dependent feeding of the riser tube air classifier with wood-based molded body fragments.

[0047] According to the invention, a humidity sensor unit can, for example, be selected from a group consisting of a capacitive, a resistive, a dielectric, an infrared, a microwave humidity sensor unit or a combination thereof.

[0048] 17. Plant according to one of the first embodiments 1 to 16, wherein the plant additionally comprises a dry separation table, in particular an air separation table, for receiving the material fraction from the riser tube air classifier, wherein the dry separation table is downstream of the riser tube air classifier.

[0049] A second embodiment of the invention relates to a

[0050] 1. Riser tube air classifier for classifying wood-based panel molding fragments into a defective fraction with predominantly coated wood-based panel molding fragments and a good fraction with predominantly uncoated wood-based panel molding fragments, comprising: 240044P10WO Description 2025-09-15 a riser tube with a light material discharge opening for discharging the good fraction with predominantly uncoated wood-based panel molding fragments, an air inlet element with a tapered side and a diverging side, wherein the air inlet element is arranged with the tapered side on the riser tube, wherein the air inlet element comprises a coarse material discharge device for discharging the defective fraction with predominantly coated wood-based panel molding fragments, in particular the coarse material discharge device seals the air inlet element at the bottom, in particular closes it at the bottom,An air volume flow supply device for supplying the riser pipe with an air volume flow in the direction from the side facing away from the light material discharge opening to the side of the riser pipe facing the light material discharge opening, wherein the air volume flow supply device is functionally connected to the air inlet element and is designed such that the riser pipe can be supplied with the air volume flow uniformly from the side facing away from the light material discharge opening to the side facing the light material discharge opening via the air inlet element; an inlet pipe for supplying the riser pipe air classifier, wherein the inlet pipe projects at least partially into the riser pipe on the side of the light material discharge opening.

[0051] Within the scope of the present invention, "wood-based material molded bodies" are understood to mean molded bodies, in particular molded parts, such as molded panels made of materials, especially materials in the solid state, from which, for example, components and structures can be manufactured. The material molded bodies comprise a fiber component, in particular a wood component, for example, a wood chip component, a wood wool component, a wood fiber component, a C4 plant component, a CAM plant component, or a combination thereof. For example, wood-based material molded bodies are selected from a group consisting of plywood, in particular according to DIN 68705 (DIN EN 636), particleboard, in particular according to DIN EN 309, according to DIN 68763 (DIN EN 312), wood fiberboard, in particular according to DIN 68754 (DIN EN 622), for example HDF boards (high-density fiberboard), MDF boards. 240044P10WO Description 2025-09-15

[0052] (Medium-density fiberboard), ULDF boards (Ultra-lightweight fiberboard), particleboard, in particular chipboard stripboard, OSB boards (Oriented Strand Board / OSB board), for example according to DIN EN 300, LSL board (chipboard stripboard), composite boards, in particular WPC boards (Wood Plastic Composites), linoleum, lightweight boards, for example paper honeycomb boards, glued laminated timber, laminated veneer lumber or a combination thereof.

[0053] Within the scope of the present invention, CAM plant component is understood to mean a component of plants with a crassulacean acid metabolism.

[0054] Within the scope of the present invention, "coating," in particular "coating," refers to the application of a firmly adhering layer, especially of amorphous material, for example, a coating material, and in particular additionally with an adhesion promoter, to a surface of the wood-based molded body. For example, a coating material and / or adhesion promoter is selected from a group of resins, in particular condensation resins, for example, aminoplasts, in particular melamine-formaldehyde resins, thermosetting plastics, in particular phenol-formaldehyde resins, or a combination thereof.

[0055] A riser tube air classifier within the scope of the present invention is understood to be a classifier which, according to the basic principle of stream classification, uses a separation medium selected from a group of gases, gas mixtures, in particular air, fluids or a combination thereof.

[0056] In a riser-tube air classifier according to the invention, the particles to be classified are fed into a tube, in particular a riser tube, through which air flows from below, in particular from the ground. Particles with a lower settling velocity than the classifying air velocity are carried upwards, in particular against the direction of gravity, as fines, in particular good fraction; particles with a higher settling velocity pass through the classifier downwards, in particular in the direction of gravity, as coarses, in particular bad fraction.

[0057] According to the invention, a riser tube air classifier can, for example, be selected from a group consisting of a gravity classifier, in particular a rotary classifier, a 240044P10WO Description 2025-09-15

[0058] Zigzag classifier, a floating classifier, a cascade classifier or a combination thereof.

[0059] Within the scope of the present invention, classification is understood to mean separation according to a separation criterion into at least two fractions, in particular into a good fraction and a bad fraction. According to the invention, air classification with a riser tube air classifier is understood to be a stream classification using air and / or other gases and / or gas mixtures and / or fluids or a combination thereof as the separation medium.

[0060] Advantages of the riser tube air classifier according to the invention are its simplicity, in particular its low complexity, its small footprint, its environmental friendliness, in particular its recycling capability, for example, the processing, in particular the reprocessing of coated wood-based molded bodies, in particular fiberboards, and the possibility of an optimally adjustable, in particular controllable and / or high separation efficiency.

[0061] 2. Riser tube air classifier according to the second embodiment 1, wherein the air inlet element comprises air supply openings arranged circumferentially, in particular in the radial direction, and wherein the air volume flow supply device is designed such that the riser tube can be supplied with the air volume flow via the arranged air supply openings.

[0062] Within the scope of the present invention, the air supply openings are selected from the group of geometric shapes consisting of a circle, in particular an ellipse, a polygon, in particular a dodecagon, a hendecagon, a decagon, a nonagon, an octagon, a heptagon, a hexagon, a pentagon, a tetragon, a trigon or a combination thereof.

[0063] 3. Riser pipe air classifier according to one of the second embodiments 1 to 2, wherein the riser pipe in the area of ​​the feed pipe which projects at least partially into the riser pipe comprises at least partially a conical area 240044P10WO Description 2025-09-15, wherein the conical area tapers, in particular conically towards the light material discharge opening.

[0064] 4. Riser pipe air classifier according to the second embodiment 3, wherein the riser pipe comprises a riser pipe expansion, in particular a radially circumferential riser pipe expansion, as a transition into the conical area.

[0065] Within the scope of the present invention, a riser pipe expansion is understood to mean an expansion of the riser pipe, in particular an enlargement, for example a bulging of the riser pipe.

[0066] 5. Riser tube air classifier according to one of the second embodiments 1 to 4, wherein the riser tube expansion has an inner cross-sectional area in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4 with respect to the inner cross-sectional area of ​​the riser tube.

[0067] 6. Riser tube air classifier according to one of the second embodiments 1 to 5, wherein the air inlet element on the diverging side has an inner cross-sectional area in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8 with respect to the inner cross-sectional area of ​​the riser tube.

[0068] 7. Riser pipe air classifier according to one of the second embodiments 1 to 6, wherein the feed pipe has an inner cross-sectional area in the range of 0.2 to 0.85, preferably in the range of 0.35 to 0.7, particularly preferably in the range of 0.45 to 0.6, based on the inner cross-sectional area of ​​the riser pipe.

[0069] 8. Riser tube air classifier according to one of the second embodiments 1 to 7, wherein the conical section together with the riser tube expansion has a height in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25, based on the height of the riser tube without the sum of the heights of the conical section together with the riser tube expansion and the air inlet element.

[0070] 9. Riser tube air classifier according to one of the second embodiments 1 to 8, wherein the air inlet element has a height in the range of 0.2 to 0.7, preferably in the 240044P10WO Description 2025-09-15

[0071] range of 0.25 to 0.65, particularly preferably in the range of 0.3 to 0.45, based on the height of the riser pipe without the sum of the heights of the conical section together with the riser pipe expansion and the air inlet element.

[0072] 10. Riser tube air classifier according to one of the second embodiments 1 to 9, wherein the inlet tube has a height in the range of 0.7 to 1, preferably in the range of 0.75 to 0.95, particularly preferably in the range of 0.8 to 0.9, based on the height being the sum of the heights of the conical section together with the riser tube expansion.

[0073] 11. Riser tube air classifier according to one of the second embodiments 1 to 10, wherein the inlet tube has a height in the range of 1 to 1.15, preferably in the range of 1.001 to 1.10, particularly preferably in the range of 1.002 to 1.005, based on the height of the riser tube excluding the sum of the heights of the conical section together with the riser tube expansion and the air inlet element.

[0074] The advantage of the cross-sectional and / or length ratios according to the invention is the formability, in particular the design, for example, of a suspended turbulence layer within the riser pipe, wherein the position, for example, the height within the riser pipe, is adjustable, in particular controllable, and thus the separation sharpness can be actively influenced, in particular optimally adjustable.

[0075] 12. Riser tube air classifier according to one of the second embodiments 1 to 11, wherein the riser tube air classifier additionally comprises a funnel element with a wide end and a narrow end, wherein the funnel element is arranged between the air inlet element and the coarse material discharge device, wherein the wide end of the funnel element is connected to the diverging side of the air inlet element and the narrow end of the funnel element is connected to the coarse material discharge device.

[0076] A third embodiment of the invention relates to a 240044P10WO Description 2025-09-15

[0077] 1. A method for processing, in particular reprocessing, coated wood-based molded bodies, for example with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, and most preferably in the range of 10 to 25%, into free-flowing particles, in particular fibrous material particles, comprising the steps of: a. Providing a coated wood-based molded body, in particular with a moisture content according to DIN EN 322: Aug 1993, in the range of 1 to 100%, preferably in the range of 3 to 60%, particularly preferably in the range of 5 to 40%, and most preferably in the range of 10 to 25%; b. Providing a plant for processing, in particular reprocessing, coated wood-based molded bodies according to one of the first embodiments 1 to 17; c.Comminution of the coated wood-based molded bodies provided in step a) using the comminution device provided in step b) and production of.

[0078] . Wood-based panel molding fragments with coated wood-based panel molding fragments and uncoated wood-based panel molding fragments; d. Supplying the riser pipe of the riser pipe classifier provided in step b) with the air volume flow provided via the air supply device; e. Feeding the feed pipe of the riser pipe classifier provided in step b) via the feed device provided in step b) with the wood-based panel molding fragments produced in step c) and separating the wood-based panel molding fragments with the air volume flow provided in step d) into a defective fraction with predominantly coated wood-based panel molding fragments and a good fraction with predominantly uncoated wood-based panel molding fragments; 240044P10WO Description 2025-09-15 f.Discharge of the good fraction separated in step d) via the light material discharge opening of the riser pipe classifier provided in step b) and of the bad fraction separated in step d) via the coarse material discharge device of the riser pipe classifier provided in step b).

[0079] 2. Method for preparing coated wood-based molded bodies, according to the third embodiment 1, wherein the feeding in step e) is carried out gravimetrically per unit of time with the weighing device of the feed device provided in step b) and the air volume flow is controlled as a function thereof.

[0080] 3. Method for the preparation of coated wood-based molded bodies, according to one of the third embodiments 1 to 2, wherein the application of the air volume flow provided in step b) is in the range of 500 - 20000 m³ 3 / h, preferably in the range of 700 - 8000 m 3 / h, especially preferred in the range of 900 - 6000 m 3 / h, based on the feed rate in step e) in the range of 1 to 1000 kg / h.

[0081] 4. Method for the preparation of coated wood-based molded bodies, according to one of the third embodiments 1 to 3, wherein the application of the air volume flow provided in step b) is in the range of 3300 - 50000 m³ 3 / h, preferably in the range of 5000 - 40000 m 3 / h, especially preferred in the range of 6000 - 30000 m 3 / h, based on the feed rate in step e) in the range of 1000 to 5000 kg / h.

[0082] 5. Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 4, wherein the application in step d) with the air volume flow provided in step b) is in the range of 6000 - 80000 m³ 3 / h, preferably in the range of 12,500 - 70,000 m 3 / h, especially preferred in the range of 16500 - 60000 m 3 / h, based on the feed in step e) in the range of 5000 to 10000 kg / h.

[0083] 6. Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 5, wherein 240044P10WO Description 2025-09-15 the application in step d) with the air volume flow provided in step b) in the range of 20000 - 110000 m³ 3 / h, preferably in the range of 27000 - 100000 m 3 / h, especially preferred in the range of 33000 - 90000 m 3 / h, based on the feed rate in step e) in the range of 10000 to 15000 kg / h.

[0084] 7. Method for processing coated wood-based molded bodies, according to one of the third embodiments 1 to 6, wherein the application in step d) with the air volume flow provided in step b) is in the range of 30000 - 220000 m³ 3 / h, preferably in the range of 40,000 - 200,000 m 3 / h, especially preferred in the range of 49500 - 180000 m 3 / h, based on the feed rate in step e) in the range of 15000 to 30000 kg / h.

[0085] 8. Method for preparing coated wood-based molded bodies, according to one of the third embodiments 1 to 7, wherein the feeding in step e) is additionally carried out according to moisture per unit of time with the moisture sensor unit of the input device provided in step b) and the air volume flow is controlled depending on this.

[0086] Another embodiment of the invention relates to the use of a riser tube classifier, in particular according to one of the second embodiments 1 to 12, for separating wood-based molded body fragments produced from coated wood-based molded bodies into a bad fraction with predominantly coating-containing wood-based molded body fragments and a good fraction with predominantly coating-free wood-based molded body fragments.

[0087] The invention is explained in more detail below with reference to a drawing that illustrates only one embodiment. The drawing shows:

[0088] Fig. 1 schematic representation of a plant for processing coated wood-based molded bodies according to a first embodiment,

[0089] Fig. 2 shows a side view of a riser tube air classifier from the system according to Fig. 1, 240044P10WO Description 2025-09-15

[0090] Fig. 3 shows a side view of a riser tube air classifier according to Fig. 2 with a legend indicating length, in particular height and cross-section.

[0091] Fig. 1 schematically depicts the inventive system 1 for processing coated wood-based molded bodies 100, comprising a comminution device 2 for contact comminution of the coated wood-based molded bodies 100 into wood-based molded body fragments, a riser tube air classifier 3 for classifying the wood-based molded body fragments obtained from the comminution device 2 into a defective fraction 31 with predominantly coating-containing wood-based molded body fragments and a good fraction 32 with predominantly coating-free wood-based molded body fragments, and a feed device 4 for feeding the riser tube air classifier 3 with

[0092] Wood-based material molded body fragments. The riser tube air classifier 3 is located downstream of the shredding device 2, and the feed device 4 is arranged between the riser tube air classifier 3 and the shredding device 2. A sieve device 5 for sorting the material obtained from the shredding device 2 is shown optionally with dash-dot lines.

[0093] The wood-based panel molding fragments are separated into an oversize fraction 51, a feed fraction 52, and a screen fraction 53. The shredding device 2 is located upstream of the screen 5, and the feeding device 4 for receiving the feed fraction 52 is located downstream of the screen 5. Optionally, a non-contact shredding device 6 is located upstream of the shredding device 2 for the contact shredding of coated wood-based panel moldings 100. Furthermore, optionally, a dry separation table 17 for receiving the good fraction 32 from the riser tube air classifier 3 is located downstream of the riser tube air classifier 3.

[0094] Figure 2 shows the riser pipe air classifier 3 of the system 1, comprising a riser pipe 7, a light material discharge opening 8 for discharging the good fraction 32, and an air inlet element 10 with a converging side and a diverging side. The converging side of the air inlet element 10 is attached to the riser pipe 7. The air inlet element 10 includes a coarse material discharge device 13 (240044P10WO Description 2025-09-15) for discharging the bad fraction 31. The coarse material discharge device 13 seals the air inlet element 10 at its base. The air volume flow supply device 9 is functionally connected to an air inlet element 10 and is designed such that the riser pipe 7 inside can be supplied with an air volume flow 11 uniformly from the side facing away from the light material discharge opening 8 via the air inlet element 10 in the direction of the side of the riser pipe 7 facing the light material discharge opening 8.On the side of the light material discharge opening 8, an inlet pipe 12 projects at least partially into the riser pipe 7. Circumferentially, in particular radially circumferentially, air supply openings 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216 are arranged on the air inlet element 10. The air volume flow supply device 9 is designed such that the riser pipe 7 can be supplied with the air volume flow 11 via the arranged air supply openings 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216. In the area of ​​the inlet pipe 12, which projects at least partially into the riser pipe 7, the riser pipe 7 has at least a partially conical section 14, wherein the conical section 14 tapers towards the light material discharge opening 8. A riser pipe expansion 15 is arranged as the transition from the riser pipe 7 to the conical section 14.

[0095] Between the air inlet element 10 and the coarse material discharge device 13, a funnel element 16 with a wide end and a narrow end is additionally arranged. The wide end of the funnel element 16 is connected to the diverging side of the air inlet element 10, and the narrow end of the funnel element 16 is connected to the coarse material discharge device 13.

[0096] 240044P10WO Description 2025-09-15

[0097] 1 = Plant (for the processing of coated

[0098] wood-based molded bodies)

[0099] 2 = Shredding device

[0100] 3 = Riser pipe air classifier

[0101] 4 = Entry device

[0102] 5 = Sieve device

[0103] 6 = non-contact shredding device

[0104] 7 = Riser pipe

[0105] 8 = Light material discharge opening

[0106] 9 = Airflow supply device

[0107] 10 = Air inlet element

[0108] 11 = Air volume flow

[0109] 12 = Inlet pipe

[0110] 13 = Coarse material discharge device (rotary valve)

[0111] 14 = conical area

[0112] 15 = Riser pipe expansion

[0113] 16 = Funnel element

[0114] 17 = Dry separating table

[0115] 31 = Bad fraction

[0116] 32 = Good fraction

[0117] 51 = Oversize fraction

[0118] 52 = Feed fraction

[0119] 53 = Sieve fraction

[0120] 100 = Wood-based material molded body

[0121] = Dash-dot line(s) for optional elements

[0122] — = dashed line(s) as dimension line boundary

[0123] = dotted line(s) for air volume flow 240044P10WO Description 2025-09-15

[0124] Qsteig = Internal cross-sectional area of ​​the riser pipe

[0125] Qweit = Internal cross-sectional area of ​​the riser pipe enlargement

[0126] Qair inlet element = inner cross-sectional area of ​​the diverging side of the air inlet element

[0127] QEin = Internal cross-sectional area of ​​the inlet pipe

[0128] Lsteig = height of the riser pipe excluding the sum of the heights of the conical

[0129] Area together with the riser pipe expansion and the air inlet element LAUS = height of the conical area together with the riser pipe expansion of the riser pipe

[0130] Air inlet element = height of the air inlet element

[0131] Lein = height of the inlet pipe

Claims

240044P10WO Patent claims 2025-09-15 1. Plant (1) for processing coated wood-based molded bodies (100) into free-flowing particles comprising: a comminution device (2) for the contact comminution of coated wood-based molded bodies (100) into wood-based molded body fragments containing coatings and uncoated wood-based molded body fragments; a riser tube air classifier (3) for classifying into a defective fraction (31) with predominantly coated wood-based molded body fragments and a good fraction (32) with predominantly uncoated wood-based molded body fragments; a feeding device (4) for feeding the riser tube air classifier (3) with wood-based molded body fragments in a weight- and / or time-dependent manner, wherein the feeding device (4) comprises a weighing device for gravimetrically determining the feed rate of the riser tube air classifier (3) per unit of time.wherein the riser tube air classifier (3) is downstream of the comminution device (2) and the feed device (4) is arranged between the riser tube air classifier (3) and the comminution device (2).

2. Plant (1) according to claim 1, characterized in that the plant (1) additionally comprises a sieving device (5) for sorting the wood-based material molded body fragments obtained from the comminution device (2) into an oversize fraction (51), a feed fraction (52) and a sieve passage fraction (53), wherein the comminution device (2) is upstream of the sieving device (5) and the feed device (4) for receiving the feed fraction (52) is downstream of the sieving device (5).

3. Plant (1) according to one of claims 1 to 2, characterized in that the plant (1) additionally comprises a non-contact comminution device (6), wherein the non-contact comminution device (6) of the 240044P10WO Patent claims 2025-09-15 A crushing device (2) for the contact crushing of coated wood-based molded bodies (100) is connected upstream.

4. Plant (1) according to one of claims 1 to 3, characterized in that the riser pipe air classifier (3) comprises: a riser pipe (7) with a light material discharge opening (8) for discharging the good fraction (32) consisting predominantly of coating-free wood-based panel molded body fragments, an air inlet element (10) with a converging side and a diverging side, wherein the air inlet element (10) is arranged with the converging side on the riser pipe (7), wherein the air inlet element (10) comprises a coarse material discharge device (13) for discharging the bad fraction (31) consisting predominantly of coating-containing wood-based panel molded body fragments, an air volume flow supply device (9) for supplying the riser pipe (7) with an air volume flow (11) in the direction from the side facing away from the light material discharge opening (8) to the side facing away from the light material discharge opening (8). light material discharge opening (8) on the side of the riser pipe (7), wherein the air volume flow supply device (9) is functionally connected to the an air inlet element (10) is connected and is designed such that the riser pipe (7) inside can be supplied with the air volume flow (11) uniformly from the side facing away from the light material discharge opening (8) in the direction of the side facing the light material discharge opening (8) via the air inlet element (10) an inlet pipe (12) for supplying the riser pipe air classifier (3), wherein the inlet pipe (12) projects at least partially into the riser pipe (7) on the side of the light material discharge opening (8).

5. System (1) according to claim 4, characterized in that the air inlet element (10) has circumferentially arranged air supply openings (200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216) 240044P10WO patent claims 2025-09-15 and wherein the air volume flow supply device (9) is designed such that the riser pipe (7) can be supplied with the air volume flow (11) via the arranged air supply openings (200, 201 , 202, 203, 204, 205, 206, 207, 208, 209, 210, 211 , 212, 213, 214, 215, 216).

6. Plant (1 ) according to one of claims 4 to 5, characterized in that the riser pipe (7) in the area of ​​the inlet pipe (12) which projects at least partially into the riser pipe (7) comprises at least partially a conical area (14), wherein the conical area (14) tapers towards the light material discharge opening (8).

7. Plant (1 ) according to one of claims 4 to 6, characterized in that the riser pipe expansion (15) has an inner cross-sectional area (Qweit) in the range of 1.01 to 2, preferably in the range of 1.05 to 1.7, particularly preferably in the range of 1.07 to 1.4 with respect to the inner cross-sectional area (Qsteig) of the riser pipe (7).

8. System (1) according to one of claims 4 to 7, characterized in that the air inlet element (10) has an inner cross-sectional area (air inlet element) on the diverging side in the range of 1.01 to 3, preferably in the range of 1.25 to 2.4, particularly preferably in the range of 1.35 to 1.8 with reference to the inner cross-sectional area (Qrise) of the riser pipe (7).

9. Plant (1) according to one of claims 4 to 8, characterized in that the conical region (14) together with the riser tube enlargement (15) of the riser tube (7) has a height (LAUS) in the range of 1.01 to 1.6, preferably in the range of 1.09 to 1.5, particularly preferably in the range of 1.10 to 1.25, based on the height (Lsteig) of the riser tube without the sum of the heights of the conical region (14) together with the riser tube enlargement (15) and the air inlet element (10). 240044P10WO Patent claims 2025-09-15 10. Riser tube air classifier (3) for classifying wood-based panel molding fragments into a defective fraction (31) with predominantly coated wood-based panel molding fragments and a good fraction (32) with predominantly uncoated wood-based panel molding fragments, comprising: a riser tube (7) with a light material discharge opening (8) for discharging the good fraction (32) with predominantly uncoated wood-based panel molding fragments, an air inlet element (10) with a converging side and a diverging side, wherein the air inlet element (10) is arranged with the converging side on the riser tube (7), wherein the air inlet element (10) comprises a coarse material discharge device (13) for discharging the defective fraction (31) with predominantly coated wood-based panel molding fragments,An air volume flow supply device (9) for supplying the riser pipe (7) with an air volume flow (11) in the direction from the side facing away from the light material discharge opening (8) to the side of the riser pipe (7) facing the light material discharge opening (8), wherein the air volume flow supply device (9) is functionally connected to the air inlet element (10) and is designed such that the riser pipe (7) can be supplied with the air volume flow (11) uniformly from the side facing away from the light material discharge opening (8) to the side facing the light material discharge opening (8) via the air inlet element (10), an inlet pipe (12) for supplying the riser pipe air classifier (3), wherein the inlet pipe (12) projects at least partially into the riser pipe (7) on the side of the light material discharge opening (8).

11. Method for processing coated wood-based molded bodies (100) into free-flowing particles, comprising the steps of: a) providing a coated wood-based molded body (100); b) providing a system (1 ) for processing coated wood-based molded bodies according to any one of claims 1 to 9; 240044P10WO Patent claims 2025-09-15 c) Comminution of the coated wood-based molded bodies (100) provided in step a) with the comminution device (2, 6) provided in step b) and production of wood-based molded body fragments with coated wood-based molded body fragments and uncoated wood-based molded body fragments; d) Supplying the riser pipe (7) of the riser pipe classifier (3) provided in step b) with the air volume flow (10) provided via the air supply device (9);e) Feeding the feed tube (11) of the riser classifier (3) provided in step b) via the feed device (4) provided in step b) with the wood-based panel molding fragments produced in step c) and separating the wood-based panel molding fragments with the air volume flow (10) provided in step d) into a defective fraction (31) with predominantly coated wood-based panel molding fragments and a good fraction (32) with predominantly uncoated wood-based panel molding fragments; f) Discharge of the good fraction (32) separated in step d) via the light material discharge opening (8) of the riser classifier (3) provided in step b) and of the defective fraction (31) separated in step d) via the coarse material discharge device (13) of the riser classifier (3) provided in step b).

12. Method for preparing coated wood-based molded bodies (100), according to claim 11, characterized in that the feeding in step e) is carried out gravimetrically per unit of time with the weighing device of the feed device (4) provided in step b) and the air volume flow (10) is controlled as a function thereof.

13. Method for preparing coated wood-based molded bodies (100), according to one of claims 11 to 12, characterized in that the application of the air volume flow (10) provided in step b) 240044P10WO Patent claims 2025-09-15 in the range of 3300 - 50000 m 3 / h, preferably in the range of 5000 - 40000 m 3 / h, especially preferred in the range of 6000 - 30000 m 3 / h, based on the feed rate in step e) in the range of 1000 to 5000 kg / h.

14. Method for processing coated wood-based molded bodies (100), according to one of claims 11 to 13, characterized in that the application in step d) with the air volume flow (10) provided in step b) is in the range of 6000 - 80000 m³ 3 / h, preferably in the range of 12,500 - 70,000 m 3 / h, especially preferred in the range of 16500 - 60000 m 3 / h, based on the feed in step e) in the range of 5000 to 10000 kg / h.

15. Use of a riser tube classifier (3) for separating wood-based molded body fragments (100) produced from coated wood-based molded bodies into a bad fraction (31) with predominantly coated wood-based molded body fragments and a good fraction (32) with predominantly uncoated wood-based molded body fragments.

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