WO2024236086A1 - Apparatus for gluing and mixing particles with an adhesive - Google Patents

Apparatus for gluing and mixing particles with an adhesive Download PDF

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Publication number
WO2024236086A1
WO2024236086A1 PCT/EP2024/063456 EP2024063456W WO2024236086A1 WO 2024236086 A1 WO2024236086 A1 WO 2024236086A1 EP 2024063456 W EP2024063456 W EP 2024063456W WO 2024236086 A1 WO2024236086 A1 WO 2024236086A1
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WO
WIPO (PCT)
Prior art keywords
tube
section
particle stream
gluing system
inner diameter
Prior art date
Application number
PCT/EP2024/063456
Other languages
French (fr)
Inventor
Marcus MATTSON
Jens SCHEDIN
Original Assignee
Sunds Fibertech Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunds Fibertech Ab filed Critical Sunds Fibertech Ab
Publication of WO2024236086A1 publication Critical patent/WO2024236086A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/565—Mixing liquids with solids by introducing liquids in solid material, e.g. to obtain slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/57—Mixing high-viscosity liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4335—Mixers with a converging-diverging cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • 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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • 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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed
    • 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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • 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

Definitions

  • the invention refers to an apparatus for gluing and mixing particles with an adhesive according to claim 1 .
  • predominately flow able or free-flowing particles of differing sizes mostly containing lignocellulose and/or cellulose, such as fibers, chips and the like.
  • these particles are discharged out of a dosing or metering hopper and delivered to a spreading head as a spreading apparatus.
  • At least one such apparatus is used as a forming station in combination with an endlessly rotating belt.
  • the particles, chips or fibers are spread to form a fleece or mat or layers of these onto a continuously running forming belt, and are then formed to a finished panel in a subsequent pressing station, mostly by heat and pressure.
  • Fiberboards As for the definition of boards there are mostly particleboards, fiberboards and boards made out of material with greater dimensions than fibers and particles, whereas the greater material is able to be oriented by the scattering apparatus to obtain layers of similar oriented material, mostly length or cross to the working direction, usually referred to as oriented stranded boards (OSB). Fiberboards mostly are composed out of fibers, usually prepared by refiners and preferably glued in a so called blow-line.
  • the used adhesive or glue as binder has to be taken into account in the production process to obtain good opportunities for selling the manufactured products in the market or to the finishing industry. Therefore it is basically known that the injection of adhesive into a stream of fibers or particles has a significant influence on the costs but in almost the same important manner the quality of the distribution of the adhesive onto the particles is essential to obtain products with a high quality. As of late a lot of inventions have been made public about solutions for better achievements in the gluing sector.
  • the object of the invention is therefore to create an apparatus with which adhesive can be applied to particles or similar particles at high quality and efficiently so that the glued particles allow efficient production of products of high quality.
  • Especially the mixing area of the adhesive with the particles should be enhanced.
  • the second mixing effect of mixing glued particles with other glued particles and/or not yet glued particles should be established or enhanced. Caking of adhesive and/or glued particles should be reduced or avoided in the particles and in the gluing system as well.
  • the invention emanates of an apparatus for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards.
  • the particles are pneumatically suspended and/or transported as a particle stream in a circular pipe with an inner diameter
  • a gluing system is arranged in, along or as part of the pipe
  • said gluing system comprises a tube connected at least with one opening of the tube with the pipe using at least one flange, wherein in said tube a body is centrally arranged with a holding structure within the inner diameter of the tube, wherein said body features a front at least partially with a streamlined contour towards the oncoming particle stream and wherein at least one nozzle for the delivery of adhesive onto the particles of the particle stream is arranged at, preferably in the rear of, the body.
  • the particle stream can also be regarded as a falling particle stream in ducts, only with gravity, nevertheless preferably the particles are moved or accelerated by different means like pneumatic conveyors or mechanical means like rotating wheels.
  • the tube may be split perpendicular to the central axis therefore arranging at least two segments of the tube which are like two tubes or pipes one after the other combined by flanges respectively a flange assembly if the segments are joined together.
  • the gluing system comprises at least two different sections I, II, III, 0 wherein the permeable area or permeable diameter for the particle stream is changing differently due to an arrangement of an in- or decreasing inner diameter of the tube and/or due to the in- or decreasing of the diameter of the body.
  • At least one of the internal borders of the sections meaning the adjacent sections have the cut surface of the tube or the ends of a segment, therefore to connect the segments an flange assembly has to be arranged comprising two flanges facing each other on different segments.
  • the outlet or the end of the third section of the tube is arranged with a flange to be connectable to another apparatuses or pipes.
  • flanges arranged at both ends of the tube of the gluing system. Still these flanges are not the necessary to combine different segments of the tube of the gluing system together.
  • a flange assembly is arranged between the first section I and the second II section and/or at least one flange respectively a flange assembly is arranged between the second section II and the third section.
  • the tube can have flanges on the inlet and/or the outlet to be connectable with other means like pipes or apparatuses from whom or to which the fibers are transported.
  • the gist of the invention is to arrange tube which is able to be split up for maintenance reasons and/or for changing parts of the tube, hence its segments, against other segments.
  • the changing can be used to change the features or characteristics of such segments, like another body or another inner diameter arrangement.
  • the border of the segments are arranged at either sectional borders or other suitable places.
  • One choice to place a flange, hence the ends of two segments, is to obtain segments of the tubes which are easier to handle by one or two persons or are able to dislocated or moved in scare spaces in plants.
  • the gluing system preferably comprises at least three different sections I, II, III in which along the direction of the particle stream the inner diameter of the pipe is increasing or decreasing in the first section I, and/or the inner diameter is increasing or decreasing in the second section II and/or the inner diameter of the pipe is increasing or decreasing in the third section III.
  • the inner diameter of the second section II is decreasing and the inner diameter of the third section is increasing.
  • an apparatus for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards, wherein the particles are pneumatically suspended and transported as a particle stream in a circular pipe with an inner diameter, wherein a gluing system is arranged in at least one part of the pipe to apply adhesive to the particles of the particle stream, wherein said gluing system comprises a tube with at least one flange and a body centrally arranged within the inner diameter of the tube with a holding structure, said body is arranged with its front at least partially featuring a streamlined contour towards the oncoming particle stream and at least one nozzle delivering adhesive onto the particles of the particle stream,
  • This apparatus is characterized in that in the gluing system the particle stream and/or the particles are at least partially moved radially outwards due to the increasing of the inner diameter of the tube, that in the following second section II the particle stream and/or particles are at least partially moved radially inwards due to the decreasing of the inner diameter of the tube, that during the decreasing of the inner diameter of the tube adhesive is applied to the particles and/or the particle stream and that in the third section the diameter of the tube is increasing to let the particles and/or the particle stream move at least partially radially outwards thereby enhancing the mixing of the adhesive and the particles in the particle stream.
  • the tube in which the at least three sections I, II, III are arranged is segmented and can be assembled as gluing system and disassembled with arranged flanges.
  • one flange assembly comprising two flanges at the respective ends of the segmented tube to be combined.
  • the movement of the particles or the particle stream radially outwards is supported by the centrally arranged body, which might be arranged at least partly in the first section of the gluing system and which ends preferably at the end of the first section or in between the two borders of the second section.
  • the gluing system might be arranged in an existing pipe which is used to transport and/or contain a moving particle stream.
  • the gluing system can be implemented as a retrofit for existing gluing systems, especially by using flanges and/or adapters to fit into.
  • the gluing system is especially designed for blow-lines with higher pressure than the surroundings and a particle stream moving in a steam containing atmosphere but can also be used in a normal environment or in pneumatic supported conveyors e.g. ducts or pipes.
  • the diameters in question are used to describe the permeable area in the tube of the gluing system, hence the inner surface of the tube and the outer surface of the body arranged in the tube.
  • the system is mainly arranged in a symmetrical manner to the main or central axis along the tube.
  • the holding structure for the body itself might or is mainly an exception from this symmetry.
  • the use of radially is usually referencing to the central axis.
  • the borders or boundaries of the sections can be defined especially by a variation of the arranged changes of the inner diameter of the pipe. For example a border occurs if the inner diameter of the pipe changes from an increasing diameter to a decreasing or stagnant diameter. Stagnant diameters might be helping as calming areas for the particle flow or as transition areas between sections.
  • gluing system Due to the modular structure of the gluing system it is easy to adapt such a gluing system to different plants, different use of materials and different adhesives. Different adhesives are for example UF, MDI, pMDI or such binders, which needs different treatments for gluing and or mixing.
  • borders are an exemption from this approach but it might help the gluing system if the borders are usable in the mathematical equations of both sides so there might be no fracture.
  • the body is arranged at least partially in the first section I.
  • the body might be arranged throughout the first section. It might be helpful if the body is extending even into the pipe before the gluing section or in other words is extending beyond the gluing system or its flange.
  • the body is arranged at least partially in the second section II.
  • At least one nozzle is arranged in the first or section of the gluing system, most preferably at the rear and/or the end of body. It might be contributing if the nozzles are arranged on the circumference of the tube as well, preferably in the first or second section.
  • the at least one nozzle and/or a spray zone might be arranged with a vectorial share along the direction of the particle stream, especially if the nozzle is arranged at the end of the body and shows a circular spray zone. It is especially preferred if the central axis or the symmetry of the circular spray zone is aligning with the central axis of the tube.
  • the outer body is increasing in the first section I along the direction of the particle stream, at least partially.
  • the body is streamlined with its front against the oncoming particles or the particle stream.
  • the outer diameter of the body is decreasing along the direction of the particle stream in the second section II.
  • the body features an abrupt end, preferably with a reduction of its diameter from several mm to zero mm along a few mms of the central axis
  • the end of the body might be along an asymptote to a perpendicular line based on the central axis or along a quadrant respectively a hyperbola.
  • the shape of the end of the body is formed as a hemicycle respectively as a hemisphere.
  • transitional section 0 is arranged in such a way that said transitional section 0 features a constant inner diameter of the tube and/or an constant outer diameter of the body.
  • Such a transitional section might be arranged as well with a curved inner surface or a curved tube without an inflection point along the particle stream for improving the connection of the different inclinations of neighboring sections.
  • the tubes or inner surfaces of the tubes in at least one of the sections I, II, III are comparable to a truncated cone with a circular symmetry around the central axis.
  • the inner diameter of the tube in the second section II is reduced along a curve or a line with a different gradient or derivative along the central axis.
  • the permeable diameter which is defined by the inner diameter or where it is necessary subtracted by the occupied space of the body or its diameter, the following arrangement deems advantageous:
  • the smallest permeable area Ai for the particle stream in the second section II is similar or greater than the smallest permeable area A2 in the third section III or in the section 0 between the second section II and the third section III.
  • the smallest permeable area A1 it has to be understood, that by different alignments of the inner surface of the tube and the outer surface of the body, the smallest permeable area must not defined by lines perpendicular to the central axis of the tube, but perpendicular to the inner surface of the tube and/or the outer surface of the body, see Fig. 3.
  • a nozzle with an circular outlet is arranged, wherein the outlet circle is arranged normal to the central axis and that the outlet has a distance to the central axis of the tube
  • the outlet of the nozzle is arranged in such a way that the adhesive is directed radially or along an pointed angle P (beta) to the central axis along the particle stream.
  • the adhesive is sprayed in a ring like manner and coaxially to the central axis.
  • the adhesive is sprayed in a ring like manner and coaxially to the central axis.
  • the holding structure might comprises at least one radially arranged carrier connecting the body with the inner surface of the tube and that at least on supply line in the carrier is connecting fixtures respectively fittings on the body, especially the nozzle with the surroundings of the tube.
  • This might be advantageous to provide safety for the service pipe of the nozzle, as this service pipe might be more secure to the oncoming particle stream, especially in a highly abrasive surrounding, like it happens in a blow line.
  • At least two carriers arranged circumferential to the body and that the distance between the carriers are preferably equal to each other.
  • the gluing system or the pipe with the gluing system might be part of or connected with a refiner, preferably with a disc refiner, for producing a particle stream with steam.
  • a refiner is used in a blow-line system and provides the excess pressure of several bars.
  • the end of tube connected with the pipe after the gluing system has the same diameter than the diameter of the pipe of the gluing system.
  • the diameter of the pipe after the gluing system is smaller or the same diameter of the pipe before the gluing system. As smaller diameter might help to minimize the pressure loss due to the gluing system, especially if the particle stream is moved in a pneumatic supported manner or in a blow-line.
  • the gluing system is part or arranged as a stage of expansion for an apparatus transporting particles or as a substitute for existing inferior gluing systems.
  • a blow line is a duct of a certain length whereas at some point or at the end of the duct glue e.g. adhesives are added to the steam/fiber stream.
  • the area in which the adhesives are added is usually a gluing system and most likely is separated or better detachable from the end-to-end duct of the blow line, most of the time for maintenance or a transition.
  • the gluing systems of the state of the art are usually monolithic or one-piece-parts and are detachable with one flange, if installed at the beginning or the end of the blow line or with two flanges if installed in the middle.
  • flanges according to this invention are high pressure flanges and there are bolt flanges arranged at their circumferences.
  • Fig. 1 presents a sectional view of a first embodiment of the gluing system
  • Fig. 2 presents a sectional view of a next embodiment of the gluing system as part of an existing pipe lengthwise to the flow of the particle stream
  • Fig. 3 presents a sectional view of a further embodiment
  • Fig. 4 presents a sectional view of one more embodiment without a corresponding pipe arrangement.
  • Fig. 1 presents a sectional view lengthwise to the production direction of an apparatus in which the invention is used as part of a pneumatic conveyor or a blow-line pictured by a pipe 13 at the beginning and first opening of the gluing system 1 and at the end of the gluing system.
  • the pipe 13 on both sides of the gluing system 1 has the same inner diameter 14.
  • the particles are moved or transported in the pipe 13 as particle stream 12 along the central axis 17.
  • the central axis 17 can be arranged vertically, horizontally or angular. A vertical use is common for transporting the particles due to the gravitation, sometimes as known in the state of the art accelerated by different means.
  • flange assembly 16 several flanges 15 are arranged to combine different segments of the tube 5 together.
  • Two flanges 15, coming together to join their segments of the tube are mentioned as flange assembly 16.
  • the gluing system as a tube with a constant diameter 6 and the second and third sections II, III have changing inner diameters 6.
  • the first section I and the second and third section II, III are two segments of the tube and to make them interchangeable to adapt the gluing system 1 to different circumstances.
  • Fig. 2 presents a second sectional view lengthwise to the production direction showing the gluing system 1 , which can be subdivided in at least three different section, wherein the different sections are defined by different arrangements or the changes of the inner diameter 6.
  • the inner diameter 6 is increasing.
  • the inner diameter 6 is decreasing and in the third section III the inner diameter 6 is increasing again.
  • a body is centrally arranged which is streamlined at its front 8 against the oncoming particle stream 13 and shows a nozzle 3 at the end 9 of the body for delivering the adhesive to the particles e.g. the particle stream 12.
  • a nozzle 3 at the end 9 of the body for delivering the adhesive to the particles e.g. the particle stream 12.
  • the gluing system 1 is connected with the pipe 13 via flanges 15.
  • the combination of two flanges 15 is shown as flange assembly 16.
  • Fig. 3 a different embodiment is shown and the main differences are the arrangement of transition sections 0 (zero), which are mainly composed of stagnant inner diameters 6 of the tube 5. It is preferred but not limited to this embodiment that the holding structure 2 is arranged between the first section I and the second section II in this transitional section 0.
  • FIG. 1 shows a line as a theoretical progression 18 in the lower part of the drawing.
  • the outer pipes 13 have the same diameter 14.
  • the diameter 10 of the pipe 13 of the exiting side of the gluing system 1 is smaller than the diameter of the pipe 13 at the incoming (left) side of the pipe 13.
  • Fig. 4 shows a further embodiment of the gluing system, showing mainly only the gluing system 1 itself without the pipes 13 and in view of Figure 2 without the first transitional section 0.
  • the particle stream enters the gluing system 1 and is moved radially outwards due to the increasing diameter or the opening angle oci of the tube 5.
  • the movement might be supported in the first section I due to the streamlined body 4.
  • the particle stream 12 is moved radially inwards to the central axis and the velocity might be increased due to the reduction of the inner diameter 6 or better the permeable area Ai remaining for the particle stream 12.
  • the particle streams comes into contact with the sprayed adhesive 11 and is mixed with it.
  • the tube 5 is opening up again by increasing the inner diameter 6 along the opening angle am of the tube 5.
  • the closing angle aii of the tube 5 is only shown in Figure 2.
  • the adhesive is delivered to the particle stream 12 with a spraying angle P (beta) regarding to the central axis.
  • a split of the tube into segments along the central axis of the tube to obtain half shells or quarter shells. Such might improve the maintenance, for example if the upper half of one of the sections is removable to make maintenance at certain parts.
  • Such splits can be combined with cuts perpendicular to the central axis to obtain several parts of tubes.
  • Still some sections of the gluing system can be combined on or in one segment of the tube, to limit down the necessary flange assemblies in the gluing system.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

- 22 - Dipl.-Ing. (FH) Helmut Hartdegen, European Patent Attorney, Angerfeldstr. 12a, D-82205 Gilching, SF1006WO - Seite 22/22 Abstract: The invention refers to an apparatus for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards, wherein the particles are pneumatically suspended and transported as a particle stream (12) in a circular pipe (13) with an inner diameter (14), wherein a gluing system (1) is arranged in, along or as part of the pipe (13), wherein said gluing system (1) comprises a tube (5) connected at least with one opening of the tube (5) with the pipe (13) using at least one flange (15) wherein in said tube (5) a body (4) is centrally arranged with a holding structure (2) within the inner diameter (6) of the tube (5), said body (4) features a front (8) at least partially with a streamlined contour towards the oncoming particle stream (12) and wherein at least one nozzle (3) for the delivery of adhesive (11) onto the particles of the particle stream (12) is arranged at, preferably in the rear of, the body (4). The solution provided by the invention comprises the tube (5) of the gluing system (1) is segmented and that at least two segments are connected together with flanges (15). (Figure 1)

Description

APPARATUS FOR GLUING AND MIXING PARTICLES WITH AN ADHESIVE
The invention refers to an apparatus for gluing and mixing particles with an adhesive according to claim 1 .
Furthermore a stage of extension is described for existing apparatuses or blow lines.
BACKGROUND OF THE INVENTION
In the production of boards out of shredded material, there are used predominately flow able or free-flowing particles of differing sizes, mostly containing lignocellulose and/or cellulose, such as fibers, chips and the like. After usually having being provided with binder agents, these particles are discharged out of a dosing or metering hopper and delivered to a spreading head as a spreading apparatus. At least one such apparatus is used as a forming station in combination with an endlessly rotating belt. Through the spreading head, the particles, chips or fibers are spread to form a fleece or mat or layers of these onto a continuously running forming belt, and are then formed to a finished panel in a subsequent pressing station, mostly by heat and pressure.
As for the definition of boards there are mostly particleboards, fiberboards and boards made out of material with greater dimensions than fibers and particles, whereas the greater material is able to be oriented by the scattering apparatus to obtain layers of similar oriented material, mostly length or cross to the working direction, usually referred to as oriented stranded boards (OSB). Fiberboards mostly are composed out of fibers, usually prepared by refiners and preferably glued in a so called blow-line.
As a matter of fact next to the costs of the raw materials comprising cellulose or lignocellulose the used adhesive or glue as binder has to be taken into account in the production process to obtain good opportunities for selling the manufactured products in the market or to the finishing industry. Therefore it is basically known that the injection of adhesive into a stream of fibers or particles has a significant influence on the costs but in almost the same important manner the quality of the distribution of the adhesive onto the particles is essential to obtain products with a high quality. As of late a lot of inventions have been made public about solutions for better achievements in the gluing sector.
Some of these might be DE 16 32 450 B2, EP 1 670 623 B1 , EP 2 213431 B1 , EP 2 704 884 B1 , EP 2 718 069 B1 , EP 2 939 807 B1 , US 3 198 655 A, US 4 323 314 A, US 6 197 236 B1 , US 9 114 577 B2 or WO 2003 106 127 A1.
These publications are the state of the art from which the invention would like to start. The main disadvantages are coagulations of adhesive and/or glued particles in the process which disturb the following apparatuses in such plants and usually cause troubles in the production process. On top the producers are used to short maintenance intervals due to caking of the glued particles and/or the adhesive on the conveyors or following up apparatuses like bunkers, spreading units and so on.
Finally the lost adhesive due to such occurrences results in loss of expensive adhesive or glue and the usual approach is to send more glue as efficiently needed into the system. OBJECT OF THE INVENTION
The problems mentioned above should be addressed by the invention by creating an apparatus for gluing particles.
The object of the invention is therefore to create an apparatus with which adhesive can be applied to particles or similar particles at high quality and efficiently so that the glued particles allow efficient production of products of high quality. Especially the mixing area of the adhesive with the particles should be enhanced. Secondly the second mixing effect of mixing glued particles with other glued particles and/or not yet glued particles should be established or enhanced. Caking of adhesive and/or glued particles should be reduced or avoided in the particles and in the gluing system as well.
SUMMARY OF THE INVENTION
The problems are solved for such an apparatus by the features of the main claim.
Regarding the apparatus the invention emanates of an apparatus for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards.
In such an apparatus the particles are pneumatically suspended and/or transported as a particle stream in a circular pipe with an inner diameter, wherein a gluing system is arranged in, along or as part of the pipe, wherein said gluing system comprises a tube connected at least with one opening of the tube with the pipe using at least one flange, wherein in said tube a body is centrally arranged with a holding structure within the inner diameter of the tube, wherein said body features a front at least partially with a streamlined contour towards the oncoming particle stream and wherein at least one nozzle for the delivery of adhesive onto the particles of the particle stream is arranged at, preferably in the rear of, the body.
The particle stream can also be regarded as a falling particle stream in ducts, only with gravity, nevertheless preferably the particles are moved or accelerated by different means like pneumatic conveyors or mechanical means like rotating wheels.
The problem for an apparatus with the above mentioned features is solved by a segmented tube for the gluing system and that at least two segments are connected together with flanges.
It is in the scope of the invention to split the tube along the direction of the flow of the particle stream therefore arranging at least to segments in the form of half shells. Alternatively or cumulatively the tube may be split perpendicular to the central axis therefore arranging at least two segments of the tube which are like two tubes or pipes one after the other combined by flanges respectively a flange assembly if the segments are joined together.
Preferably the gluing system comprises at least two different sections I, II, III, 0 wherein the permeable area or permeable diameter for the particle stream is changing differently due to an arrangement of an in- or decreasing inner diameter of the tube and/or due to the in- or decreasing of the diameter of the body.
In an preferably arrangement at least one of the internal borders of the sections, meaning the adjacent sections have the cut surface of the tube or the ends of a segment, therefore to connect the segments an flange assembly has to be arranged comprising two flanges facing each other on different segments. Preferably the outlet or the end of the third section of the tube is arranged with a flange to be connectable to another apparatuses or pipes.
Preferably there are two flanges arranged at both ends of the tube of the gluing system. Still these flanges are not the necessary to combine different segments of the tube of the gluing system together.
Preferably a flange assembly is arranged between the first section I and the second II section and/or at least one flange respectively a flange assembly is arranged between the second section II and the third section.
To be more concise the tube can have flanges on the inlet and/or the outlet to be connectable with other means like pipes or apparatuses from whom or to which the fibers are transported. The gist of the invention is to arrange tube which is able to be split up for maintenance reasons and/or for changing parts of the tube, hence its segments, against other segments. The changing can be used to change the features or characteristics of such segments, like another body or another inner diameter arrangement. Preferably the border of the segments are arranged at either sectional borders or other suitable places. One choice to place a flange, hence the ends of two segments, is to obtain segments of the tubes which are easier to handle by one or two persons or are able to dislocated or moved in scare spaces in plants.
The gluing system preferably comprises at least three different sections I, II, III in which along the direction of the particle stream the inner diameter of the pipe is increasing or decreasing in the first section I, and/or the inner diameter is increasing or decreasing in the second section II and/or the inner diameter of the pipe is increasing or decreasing in the third section III.
In a most preferred embodiment the inner diameter of the second section II is decreasing and the inner diameter of the third section is increasing. The problem is additionally solved according to an embodiment arranged with the following features for an apparatus:
As basis an apparatus is used for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards, wherein the particles are pneumatically suspended and transported as a particle stream in a circular pipe with an inner diameter, wherein a gluing system is arranged in at least one part of the pipe to apply adhesive to the particles of the particle stream, wherein said gluing system comprises a tube with at least one flange and a body centrally arranged within the inner diameter of the tube with a holding structure, said body is arranged with its front at least partially featuring a streamlined contour towards the oncoming particle stream and at least one nozzle delivering adhesive onto the particles of the particle stream,
This apparatus is characterized in that in the gluing system the particle stream and/or the particles are at least partially moved radially outwards due to the increasing of the inner diameter of the tube, that in the following second section II the particle stream and/or particles are at least partially moved radially inwards due to the decreasing of the inner diameter of the tube, that during the decreasing of the inner diameter of the tube adhesive is applied to the particles and/or the particle stream and that in the third section the diameter of the tube is increasing to let the particles and/or the particle stream move at least partially radially outwards thereby enhancing the mixing of the adhesive and the particles in the particle stream.
For maintenance purposes the tube in which the at least three sections I, II, III are arranged is segmented and can be assembled as gluing system and disassembled with arranged flanges. Preferably one flange assembly comprising two flanges at the respective ends of the segmented tube to be combined.
Preferably the movement of the particles or the particle stream radially outwards is supported by the centrally arranged body, which might be arranged at least partly in the first section of the gluing system and which ends preferably at the end of the first section or in between the two borders of the second section.
Preferably there is a distance between the end of the body and the beginning of the third section or the end of the second section.
The gluing system might be arranged in an existing pipe which is used to transport and/or contain a moving particle stream. Usually the gluing system can be implemented as a retrofit for existing gluing systems, especially by using flanges and/or adapters to fit into.
The gluing system is especially designed for blow-lines with higher pressure than the surroundings and a particle stream moving in a steam containing atmosphere but can also be used in a normal environment or in pneumatic supported conveyors e.g. ducts or pipes.
As the influencing surfaces the diameters in question are used to describe the permeable area in the tube of the gluing system, hence the inner surface of the tube and the outer surface of the body arranged in the tube. The system is mainly arranged in a symmetrical manner to the main or central axis along the tube. The holding structure for the body itself might or is mainly an exception from this symmetry. The use of radially is usually referencing to the central axis.
The borders or boundaries of the sections can be defined especially by a variation of the arranged changes of the inner diameter of the pipe. For example a border occurs if the inner diameter of the pipe changes from an increasing diameter to a decreasing or stagnant diameter. Stagnant diameters might be helping as calming areas for the particle flow or as transition areas between sections.
SUMMARIZING THE ADVANTAGES OF THE INVENTION:
Due to the modular structure of the gluing system it is easy to adapt such a gluing system to different plants, different use of materials and different adhesives. Different adhesives are for example UF, MDI, pMDI or such binders, which needs different treatments for gluing and or mixing.
Different plants are handling the material differently, for example how to prepare the fibers or how to comminute them. Usually different refiners bring also different quality of fibers into a blow line.
Next is the possibility to adapt the gluing system to different materials like like bagasse, straw, soft or hard wood, one year plants, waste wood and so on.
It is possible to repair or maintenance specific parts of the gluing system hence the segments in different maintenance intervals. Smaller parts might be handled by one or two persons and it is easier to work in cramped locations.
Due to the segments it should be possible to work on the gluing systems without the help of hoisting machines or forklifts.
FURTHER CHARACTERISTICS TO IMPROVE THE INVENTION:
The following features are combinable with the main idea of the invention and are able to improve the invention alone or in combination with other features furthermore. Next to linear changes of the inner diameters along the tube there might be curved arrangements deemed necessary and might help to arrange the transitions or movements of the particle stream more smoothly.
Therefore it is another preferred aspect or explanation that the decreasing or increasing of the inner diameter in the three sections I, II, III is continuously differentiable according to mathematical rules.
In combination or as an alternative approach it might be beneficial to understand the necessary changes of the inner diameter with the help of a sectional view of the outer hull of the pipe respectively the radius of the tube according to its central axis so the inner side of the pipe equates to a continuously differentiable mathematical function within a coordinate system using the central axis as x-axis.
Usually the borders are an exemption from this approach but it might help the gluing system if the borders are usable in the mathematical equations of both sides so there might be no fracture.
In another preferred aspect the body is arranged at least partially in the first section I. Alternatively the body might be arranged throughout the first section. It might be helpful if the body is extending even into the pipe before the gluing section or in other words is extending beyond the gluing system or its flange.
Preferably the body is arranged at least partially in the second section II.
Preferably at least one nozzle is arranged in the first or section of the gluing system, most preferably at the rear and/or the end of body. It might be contributing if the nozzles are arranged on the circumference of the tube as well, preferably in the first or second section. The at least one nozzle and/or a spray zone might be arranged with a vectorial share along the direction of the particle stream, especially if the nozzle is arranged at the end of the body and shows a circular spray zone. It is especially preferred if the central axis or the symmetry of the circular spray zone is aligning with the central axis of the tube.
In another advantageous possibility the outer body is increasing in the first section I along the direction of the particle stream, at least partially. Preferably the body is streamlined with its front against the oncoming particles or the particle stream.
Additionally or alternatively the outer diameter of the body is decreasing along the direction of the particle stream in the second section II.
It might be helpful if the body features an abrupt end, preferably with a reduction of its diameter from several mm to zero mm along a few mms of the central axis
Alternatively the end of the body might be along an asymptote to a perpendicular line based on the central axis or along a quadrant respectively a hyperbola.
In another aspect it might be beneficial if the shape of the end of the body is formed as a hemicycle respectively as a hemisphere.
Regarding the borders between the sections. It might be helpful if between two sections a transitional section 0 is arranged in such a way that said transitional section 0 features a constant inner diameter of the tube and/or an constant outer diameter of the body. Such a transitional section might be arranged as well with a curved inner surface or a curved tube without an inflection point along the particle stream for improving the connection of the different inclinations of neighboring sections.
In another or combining aspect it seems proper that the tubes or inner surfaces of the tubes in at least one of the sections I, II, III are comparable to a truncated cone with a circular symmetry around the central axis.
In a preferred embodiment the inner diameter of the tube in the second section II is reduced along a curve or a line with a different gradient or derivative along the central axis.
Regarding the permeable diameter, which is defined by the inner diameter or where it is necessary subtracted by the occupied space of the body or its diameter, the following arrangement deems advantageous:
The smallest permeable area Ai for the particle stream in the second section II is similar or greater than the smallest permeable area A2 in the third section III or in the section 0 between the second section II and the third section III.
Regarding the smallest permeable area A1 it has to be understood, that by different alignments of the inner surface of the tube and the outer surface of the body, the smallest permeable area must not defined by lines perpendicular to the central axis of the tube, but perpendicular to the inner surface of the tube and/or the outer surface of the body, see Fig. 3.
Preferably a nozzle with an circular outlet is arranged, wherein the outlet circle is arranged normal to the central axis and that the outlet has a distance to the central axis of the tube In another aspect the outlet of the nozzle is arranged in such a way that the adhesive is directed radially or along an pointed angle P (beta) to the central axis along the particle stream.
Alternatively or additionally it might be helpful if the adhesive is sprayed in a ring like manner and coaxially to the central axis. Preferably there is steam and/or air added inside of the ring like spraying pattern of the adhesive to push the spraying pattern respectively the adhesive outwards to the particles.
In a further aspect the holding structure might comprises at least one radially arranged carrier connecting the body with the inner surface of the tube and that at least on supply line in the carrier is connecting fixtures respectively fittings on the body, especially the nozzle with the surroundings of the tube. This might be advantageous to provide safety for the service pipe of the nozzle, as this service pipe might be more secure to the oncoming particle stream, especially in a highly abrasive surrounding, like it happens in a blow line.
Preferably there are at least two carriers arranged circumferential to the body and that the distance between the carriers are preferably equal to each other.
The gluing system or the pipe with the gluing system might be part of or connected with a refiner, preferably with a disc refiner, for producing a particle stream with steam. Usually a refiner is used in a blow-line system and provides the excess pressure of several bars.
Preferably the end of tube connected with the pipe after the gluing system has the same diameter than the diameter of the pipe of the gluing system.
In another advantageous possibility the diameter of the pipe after the gluing system is smaller or the same diameter of the pipe before the gluing system. As smaller diameter might help to minimize the pressure loss due to the gluing system, especially if the particle stream is moved in a pneumatic supported manner or in a blow-line.
Especially but necessarily due to a refiner it might be preferred to connect the gluing system or the pipe with a dryer for the exiting and glued particles.
Preferably the gluing system is part or arranged as a stage of expansion for an apparatus transporting particles or as a substitute for existing inferior gluing systems.
The arrangements of the flanges and the cutting sides between the segments are usually proposals and of course not every section has to be arranged independently on its own segment. Usually some sections of the gluing system are combined on or in one segment of the tube.
Usually a blow line is a duct of a certain length whereas at some point or at the end of the duct glue e.g. adhesives are added to the steam/fiber stream. The area in which the adhesives are added is usually a gluing system and most likely is separated or better detachable from the end-to-end duct of the blow line, most of the time for maintenance or a transition. The gluing systems of the state of the art are usually monolithic or one-piece-parts and are detachable with one flange, if installed at the beginning or the end of the blow line or with two flanges if installed in the middle. Preferably flanges according to this invention are high pressure flanges and there are bolt flanges arranged at their circumferences.
DETAILED DESCRIPTION OF THE INVENTION
In the following, the invention will be described in more detail by the aid of some preferred embodiments with reference to the attached drawings, wherein: Fig. 1 presents a sectional view of a first embodiment of the gluing system,
Fig. 2 presents a sectional view of a next embodiment of the gluing system as part of an existing pipe lengthwise to the flow of the particle stream, Fig. 3 presents a sectional view of a further embodiment,
Fig. 4 presents a sectional view of one more embodiment without a corresponding pipe arrangement.
Fig. 1 presents a sectional view lengthwise to the production direction of an apparatus in which the invention is used as part of a pneumatic conveyor or a blow-line pictured by a pipe 13 at the beginning and first opening of the gluing system 1 and at the end of the gluing system. The pipe 13 on both sides of the gluing system 1 has the same inner diameter 14. The particles are moved or transported in the pipe 13 as particle stream 12 along the central axis 17. The central axis 17 can be arranged vertically, horizontally or angular. A vertical use is common for transporting the particles due to the gravitation, sometimes as known in the state of the art accelerated by different means.
According to Fig. 1 several flanges 15 are arranged to combine different segments of the tube 5 together. Two flanges 15, coming together to join their segments of the tube are mentioned as flange assembly 16. In the first embodiment the gluing system as a tube with a constant diameter 6 and the second and third sections II, III have changing inner diameters 6. Although it would be possible to remove the body 4 it is in the scope of the invention to arrange the first section I and the second and third section II, III as two segments of the tube and to make them interchangeable to adapt the gluing system 1 to different circumstances.
Fig. 2 presents a second sectional view lengthwise to the production direction showing the gluing system 1 , which can be subdivided in at least three different section, wherein the different sections are defined by different arrangements or the changes of the inner diameter 6. In the first section I, according to the direction of the particle stream 12 the inner diameter 6 is increasing. In the second section II the inner diameter 6 is decreasing and in the third section III the inner diameter 6 is increasing again.
In the first and second section a body is centrally arranged which is streamlined at its front 8 against the oncoming particle stream 13 and shows a nozzle 3 at the end 9 of the body for delivering the adhesive to the particles e.g. the particle stream 12. With A2 the inner diameter at the border between section II and III is shown.
The gluing system 1 is connected with the pipe 13 via flanges 15. The combination of two flanges 15 is shown as flange assembly 16.
In Fig. 3 a different embodiment is shown and the main differences are the arrangement of transition sections 0 (zero), which are mainly composed of stagnant inner diameters 6 of the tube 5. It is preferred but not limited to this embodiment that the holding structure 2 is arranged between the first section I and the second section II in this transitional section 0.
Furthermore a second transitional section is shown between the second and the third section which is as well not limited to this embodiment.
Referring to Figure 2 and 3 and to reflect the changes of the inner surface respectively the inner diameter 6 of the tube 5 of the gluing system 1 a line as a theoretical progression 18 is shown in the lower part of the drawing. In Figure 1 the outer pipes 13 have the same diameter 14. In Figure 2 the diameter 10 of the pipe 13 of the exiting side of the gluing system 1 is smaller than the diameter of the pipe 13 at the incoming (left) side of the pipe 13. Fig. 4 shows a further embodiment of the gluing system, showing mainly only the gluing system 1 itself without the pipes 13 and in view of Figure 2 without the first transitional section 0.
The particle stream enters the gluing system 1 and is moved radially outwards due to the increasing diameter or the opening angle oci of the tube 5. The movement might be supported in the first section I due to the streamlined body 4. In the second section II the particle stream 12 is moved radially inwards to the central axis and the velocity might be increased due to the reduction of the inner diameter 6 or better the permeable area Ai remaining for the particle stream 12. After the end of body 4 the particle streams comes into contact with the sprayed adhesive 11 and is mixed with it. After the permeable area A2 the tube 5 is opening up again by increasing the inner diameter 6 along the opening angle am of the tube 5. For better understanding of the drawings the closing angle aii of the tube 5 is only shown in Figure 2. The adhesive is delivered to the particle stream 12 with a spraying angle P (beta) regarding to the central axis.
All the Figures show the arrangement of flange assemblies 16 and respectively the single flanges belonging to its segment of the tube 5. These flanges and the cutting sides between the segments are just proposals and of course not every section has to be arranged independently as part of its own segment.
Not shown in the Fig. 1 to 4 is a split of the tube into segments along the central axis of the tube to obtain half shells or quarter shells. Such might improve the maintenance, for example if the upper half of one of the sections is removable to make maintenance at certain parts. Such splits can be combined with cuts perpendicular to the central axis to obtain several parts of tubes. Still some sections of the gluing system can be combined on or in one segment of the tube, to limit down the necessary flange assemblies in the gluing system.
List of references: SF1006WO
1 gluing system
2 holding structure
3 nozzle
4 body
5 tube
6 diameter of 5/13 (inner)
7 diameter of body 4 (outer)
8 front
9 end
10 diameter of 13 after gluing system 1
11 adhesive
12 particle stream
13 pipe (pneumatic conveyor or blow-line)
14 diameter of 13 (inner)
15 flange
16 flange assembly
17 central axis
18 theoretical progression of 13 in area of glue system 1
19 middle part
I section (first)
II section (second)
III section (third)
0 section (transition) a angle between central axis and inner side of tube 5 according to section
P spraying angle between central axis and sprayed adhesive 11
Ai permeable area with body 4 in section II
A2 permeable area at the border of section ll/lll or their section 0 in-between

Claims

Claims
1. Apparatus for gluing and mixing particles with at least a part of an adhesive in the course of producing shaped bodies, especially fiberboards, wherein the particles are pneumatically suspended and transported as a particle stream (12) in a circular pipe (13) with an inner diameter (14), wherein a gluing system (1) is arranged in, along or as part of the pipe (13), wherein said gluing system (1 ) comprises a tube (5) connected at least with one opening of the tube (5) with the pipe (13) using at least one flange (15), wherein in said tube (5) a body (4) is centrally arranged with a holding structure (2) within the inner diameter (6) of the tube (5), said body (4) features a front (8) at least partially with a streamlined contour towards the oncoming particle stream (12) and wherein at least one nozzle (3) for the delivery of adhesive (11 ) onto the particles of the particle stream (12) is arranged at, preferably in the rear of, the body (4), characterized in that the tube (5) of the gluing system (1 ) is segmented and that at least two segments are connected together with flanges (15).
2. Apparatus according to claim 1 , characterized in that the tube (5) is split along the direction of the flow of the particle stream therefore arranging at least to half shells as segments and/or the tube (5) is split perpendicular to the central axis (17) of the tube (5) therefore arranging at least two segments of the tube (5).
3. Apparatus according to any of the aforementioned claims, characterized in that the gluing system (1) comprises at least two different sections (I, II, III) wherein the permeable area or permeable diameter for the particle stream (12) is changing differently due to an arrangement of an in- or decreasing inner diameter (6) of the tube (5) and/or due to the in- or decreasing of the diameter (7) of the body (4).
4. Apparatus according to any of the aforementioned claims, characterized in that in the at least three different sections (I, II, III, 0) the inner diameter of the pipe is decreasing or increasing in the first section I, the inner diameter is decreasing in the second section (II) and/or the inner diameter of the pipe is increasing in the third section (III).
5. Apparatus according to any of the aforementioned claims, characterized in that the body (4) is arranged at least partially in the first section (I) or that the body (4) is arranged throughout the first section and is preferably extending into the pipe (13).
6. Apparatus according to any of the aforementioned claims, characterized in that the body (4) is arranged at least partially in the second section (II), preferably with a nozzle and/or a spray zone arranged with a vectorial share along the direction of the particle stream (12).
7. Apparatus according to any of the aforementioned claims, characterized in that in the first section (I) the outer diameter of the body (4) is increasing along the direction of the particle stream (12) and that preferably in the second section (II) the outer diameter of the body is decreasing along the direction of the particle stream (12).
8. Apparatus according to any of the aforementioned claims, characterized in that between two sections a transitional section (0) is arranged in such a way that said transitional section (0) features a constant inner diameter (6) of the tube (5) and/or an constant outer diameter (7) of the body (4) and/or said transitional section (0) features a curved tube (5) without an inflection point along the particle stream (12) for connection the different inclinations of the neighboring sections.
9. Apparatus according to any of the aforementioned claims, characterized in that the outlet or the end of section (III) of the tube (5) is arranged with a flange (15).
10. Apparatus according to any of the aforementioned claims, characterized in that with two flanges (15) at both ends of the tube (5) of the gluing system (1 ) are arranged.
11. Apparatus according to any of the aforementioned claims, characterized in that at least one flange (15) respectively a flange assembly (16) is arranged between the first section (I) and the second (II) section and/or at least one flange (15) respectively a flange assembly (16) is arranged between the second section (II) and the third section (III).
12. Stage of expansion for an apparatus for a gluing system (1 ) according to any of the preceding apparatus claims, characterized in that the apparatus is arranged as a gluing system (1) or as an ad-on for a gluing system (1 ) in a pneumatically transport duct (13) for particles, whereas preferably the transport duct (13) is a blow line with an higher pressure than the ambient pressure.
PCT/EP2024/063456 2023-05-16 2024-05-15 Apparatus for gluing and mixing particles with an adhesive WO2024236086A1 (en)

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Citations (12)

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Publication number Priority date Publication date Assignee Title
US3198655A (en) 1959-11-18 1965-08-03 Fred Fahrni Method and apparatus for coating loose particles with a sprayable bonding substance
DE1632450B2 (en) 1968-02-10 1975-10-09 Draiswerke Gmbh, 6800 Mannheim Device for the continuous mixing of relatively small amounts of a finely divided component with a carrier material moved by an air stream
US4323314A (en) 1978-05-20 1982-04-06 Kaiser Wirz Max Process and apparatus for adding liquid components to pourable powdered or granular materials
EP0728562A2 (en) * 1995-02-23 1996-08-28 Carl Schenck Ag Apparatus and method for wetting particles with a fluid
US6197236B1 (en) 1991-07-10 2001-03-06 Bayer Aktiengesellschaft Method of manufacturing fibreboard from wood chips using isocyanate as binder
WO2003106127A1 (en) 2002-06-15 2003-12-24 Flakeboard Company Limited Method and device for applying a material to dried fibers that are used for producing fiber plates
EP1670623B1 (en) 2003-10-07 2011-05-04 Schenkmann-Piel Engineering-Gmbh Method for preparing fiberboards from wood fibers
EP2213431B1 (en) 2009-01-29 2013-09-04 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and apparatus for producing fibre, MDF, HDF, wood or plastic boards from fibres or fibrous material
EP2704884B1 (en) 2011-05-06 2015-01-21 IMAL S.r.l A device and a method for injecting a fluid internally of a flow of loose material.
EP2718069B1 (en) 2011-06-07 2015-08-05 Fritz Egger GmbH & Co. OG Device and method for wetting wood particles
US9114577B2 (en) 2010-09-15 2015-08-25 Kronotec Ag Method and device for the wet gluing of wood fibres
EP2939807B1 (en) 2014-05-02 2017-02-01 SWISS KRONO Tec AG Method and apparatus for manufacturing a wood fibreboard

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198655A (en) 1959-11-18 1965-08-03 Fred Fahrni Method and apparatus for coating loose particles with a sprayable bonding substance
DE1632450B2 (en) 1968-02-10 1975-10-09 Draiswerke Gmbh, 6800 Mannheim Device for the continuous mixing of relatively small amounts of a finely divided component with a carrier material moved by an air stream
US4323314A (en) 1978-05-20 1982-04-06 Kaiser Wirz Max Process and apparatus for adding liquid components to pourable powdered or granular materials
US6197236B1 (en) 1991-07-10 2001-03-06 Bayer Aktiengesellschaft Method of manufacturing fibreboard from wood chips using isocyanate as binder
EP0728562A2 (en) * 1995-02-23 1996-08-28 Carl Schenck Ag Apparatus and method for wetting particles with a fluid
WO2003106127A1 (en) 2002-06-15 2003-12-24 Flakeboard Company Limited Method and device for applying a material to dried fibers that are used for producing fiber plates
EP1670623B1 (en) 2003-10-07 2011-05-04 Schenkmann-Piel Engineering-Gmbh Method for preparing fiberboards from wood fibers
EP2213431B1 (en) 2009-01-29 2013-09-04 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and apparatus for producing fibre, MDF, HDF, wood or plastic boards from fibres or fibrous material
US9114577B2 (en) 2010-09-15 2015-08-25 Kronotec Ag Method and device for the wet gluing of wood fibres
EP2704884B1 (en) 2011-05-06 2015-01-21 IMAL S.r.l A device and a method for injecting a fluid internally of a flow of loose material.
EP2718069B1 (en) 2011-06-07 2015-08-05 Fritz Egger GmbH & Co. OG Device and method for wetting wood particles
EP2939807B1 (en) 2014-05-02 2017-02-01 SWISS KRONO Tec AG Method and apparatus for manufacturing a wood fibreboard

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