EP1908563B1 - Procéde et appareil pour la detection et l'elimination de défauts dans un flux de matiere, dans la fabrication de panneaux - Google Patents

Procéde et appareil pour la detection et l'elimination de défauts dans un flux de matiere, dans la fabrication de panneaux Download PDF

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Publication number
EP1908563B1
EP1908563B1 EP07019289.3A EP07019289A EP1908563B1 EP 1908563 B1 EP1908563 B1 EP 1908563B1 EP 07019289 A EP07019289 A EP 07019289A EP 1908563 B1 EP1908563 B1 EP 1908563B1
Authority
EP
European Patent Office
Prior art keywords
flow
several
width
imperfections
production
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07019289.3A
Other languages
German (de)
English (en)
Other versions
EP1908563A3 (fr
EP1908563A2 (fr
Inventor
Gernot Dr. Von Haas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Priority to PL07019289T priority Critical patent/PL1908563T3/pl
Publication of EP1908563A2 publication Critical patent/EP1908563A2/fr
Publication of EP1908563A3 publication Critical patent/EP1908563A3/fr
Application granted granted Critical
Publication of EP1908563B1 publication Critical patent/EP1908563B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B07C5/14—Sorting timber or logs, e.g. tree trunks, beams, planks or the like
    • 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
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Definitions

  • the invention relates to a method for detecting and eliminating irregularities from a moving material flow in the course of the production of material plates according to the preamble of claim 1 and an apparatus for detecting and eliminating irregularities from a moving material flow according to the preamble of claim 11.
  • Production plants for material boards have, in principle, at least the following production phases: material comminution (wood cutting), material preparation (drying and gluing), material sorting and arrangement (classification and scattering) and finally the pressing into a plate.
  • material comminution wood cutting
  • material preparation drying and gluing
  • material sorting and arrangement classification and scattering
  • pressing into a plate In addition to the known methods and apparatus for this successive steps are further a variety of additional and supporting steps and devices necessary to ensure the highest possible process reliability in the production of material boards.
  • DE 101 01 380 A1 is a device and route to the sorterbeschickung known to be separated in the heavy parts and lumps from the flow of material before a scattering station.
  • the device and line presented here is usually arranged between a dryer and a scattering station to fan out the material stream leaving the dryer and passing through a glue line and to feed it to an air classifier which filters out heavy parts and lumps from the material stream before the material stream in a spreading station a compressible spreading material mat is converted on a moving forming belt.
  • a separaterseschickungsumble for reformfer width up to 3.5 m is provided, the consists of at least one distribution fan, a belt feeder and an air classifier.
  • a dividing fan for widening the sorterbeschickungsumble is provided and formed from a vertically arranged pipe in which longitudinal and in the conveying direction partitions are provided which divide the discontinued material flow in widening conveyor channels.
  • a distribution device is provided, which consists of a division rake and a baffle, which divides the material flow into two partial streams.
  • the invention is based on the object of specifying a method by means of which the material streams fed from a dryer or a gluing station can be checked in a simple and effective manner in a simple and effective manner for irregularities, such as foreign bodies and / or glue lumps, and at the same time a simplified discharge of the Detected foreign body and / or Leimissempen is possible.
  • a device is to be created, with which the method can be performed, but which is also suitable for itself to detect irregularities, such as glue lumps and / or foreign bodies in a flow of material and excrete.
  • the object is achieved by the method according to claim 9, and solved by the device according to claim 11.
  • the method and the device according to the invention offer the possibility to check the material used before entering a grit hopper and the scattering to a pressed material mat and thus to prevent the secretion of large amounts of useful material by small precipitates of a part of the material flow.
  • chips and fibers are used in the production of wood-based panels, which are already delivered to a ready made from sawmills, on the other hand, locally produced by crushing machines from delivered tree trunks. It can happen every now and then that fragments of the saw blades from the sawmills or from the tools of the shredder arrive on site in the cycle and the material flow, which is pretreated in large dryers. There It is known that regularly rust breaks occur in the dryers and thus metallic particles and rust can get into the material flow here.
  • a heavy material separator which can excrete excessively large and heavy material from the material flow in advance.
  • heavy parts are not transported by the air flow in a vertical pipe upwards due to gravity and can be separated out via a suitable discharge device, for example a rotary valve.
  • a suitable discharge device for example a rotary valve.
  • only a minimum amount of recyclable material is also eliminated, so that the installation of a heavy material separator generally only has a beneficial effect on the efficiency of the entire production plant.
  • excessively long pieces of wood are also rejected if defective chips are produced by means of a defective refiner.
  • fibrous bark pieces of 30 - 200 mm in length and large and heavy rust fragments from the dryer can be eliminated here.
  • Small pieces of iron which are not discharged via the heavy material separator are now eliminated in the device according to the invention by means of the magnetic separator arranged above the radiation device. It is advantageous that even here a broadening and thus dilution of the material flow has been made to a thickness of 10 cm to 20 cm. From the radiation device now the remaining particles are detected, or pieces of metal that are not through the heavy material separator or the magnetic separator have been eliminated, such as compacted pieces of wood, dust clumps with diameters of 5 to 50 mm and glue lumps.
  • the short-term dissipation of a partial width of the material stream over the width is carried out with a separating flap which is introduced into the material flow, this being moved for example by a double-acting cylinder.
  • the brief derivation of a partial width of the material flow over the width can be carried out by means of a blast of compressed air.
  • FIG. 1 an overall plant for the production of wood-based panels or the like and in the enlarged views FIGS. 2 and 3 is shown, material, preferably chips, fibers or the like, adjusted in a dryer 8 in its moisture and fed via a wind tunnel 16 and possibly through a heavy material separator 9 with heavy-lift lock 26 a cyclone 7.
  • the cyclone 7 can also be designed as a dryer cyclone.
  • a rotary valve 1 is provided, which emits the material flow more or less continuously in the Desicherschurre 2.
  • the incoming material flow is distributed in width and passed through the guide channels 5.
  • the material flow in the radiographic device 3 is irradiated by means of suitable radiation, preferably X-ray radiation, and examined for particles which have a higher density than the control density of the material flow. It is determined with a receiver 12, where and when the radiation emitted by the transmitter 11 radiation is attenuated too much by such foreign body. It can be seen that several transmitter 11 and receiver 12 can be arranged in series next to and even parallel to each other to achieve the most accurate measurement result possible. In this case, an overlapping radiation can also be provided.
  • control density is the necessary density which has been set for the production of corresponding material plates.
  • a radiation device is the subject of other patent literature and is not described in detail, because a person skilled in the operating principle of such a radiographic device 3 is obvious and he will select depending on the application. If a foreign body is detected in a region between in a region, preferably between two baffles 6 through the irradiation device 3, then in the discharge device in a predetermined time window, a separation flap 15 is moved into the flow of material. Depending on the design of the separation device 3, a portion of the material flow containing the determined foreign body is separated and diverted into the disposal area 14.
  • the separation flap 15 is moved by means of a double-acting cylinder 13 to ensure that only the smallest possible part of the material flow is deposited with the foreign body and the separation flap 15 is transferred as soon as possible back to the starting position.
  • the constructive details such as sealing, material used, calculation of reaction time, and the like may be left to those skilled in the art.
  • the separation device 3 has, moreover, a disposal device 18 for the precipitated material of the material flow.
  • this may be designed as a screw conveyor 19.
  • the separation flap 15 may be substituted by, for example, a pneumatic nozzle system or similar devices which, upon activation, cause a portion of the material stream to be transferred to the disposal area 14.
  • a pneumatic nozzle system or similar devices which, upon activation, cause a portion of the material stream to be transferred to the disposal area 14.
  • baffles 6 it is not always necessary to guide the flow of material in the radiographic device 3 and / or the discharge device 4 by means of baffles 6. It can also be arranged over the entire width continuous guide channel 5, which should be ensured that detected foreign matter on the route between radiographic device 3 and discharge device 4 can not migrate laterally and possibly slip past the activated Abscheideklappe 15 or equivalent.
  • the material flow is transferred to an accumulation belt 20 or another suitable conveying device and, if appropriate, fed to a dissolving device 21, for example consisting of opening rollers, before the material flow finally reaches a grit hopper 22.
  • a dissolving device 21 for example consisting of opening rollers
  • the material finally waits for further processing, this usually being scattered by a spreading head 23 onto a forming belt 24 and the pressing in a continuously operating one Press 25 includes.
  • the necessary procedures and processes or the devices for this purpose are familiar to the expert and need not be further elaborated here.
  • the term foreign body encompasses particles which are particularly contained in the material flow and which have a different and / or higher density than the control density of the material stream.
  • the discharge device has tubes or square pieces, through which the material flow is passed and which can be swung for a separation of a part of the material flow.
  • a discharge device across the width sections of pneumatic nozzles (not shown) to be arranged, which press or transport the material flow in the disposal area. Due to the prevailing high temperatures of the material flow, it may be useful to avoid a condensation of water on the inner walls of the system parts from the rotary valve (1) to arrange a thermal insulation of the devices.
  • the diameter of the wind tunnel 16 is about 1.5 m.
  • the enlarged diameter of the heavy material separator is about 2 m.
  • the effective final width of the Desicherschurre can vary from 2 to 6 m, the length may well be up to 6 m long.
  • the Kaycherschurre can also be made adjustable and variably change the respective fan widths.
  • a segment area between two baffles 6 in about 70 to 200 mm wide and is monitored by a portion of the radiating device 3, wherein a separating flap 15 or the like for this segment, the partial shares the material flow can be eliminated.
  • wood particles have a density of 300kg / m3 in the control, whereas clumps of glue m 3 may have a density of up to 1,000 kg / cm and 1 to 6 in diameter.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Processing Of Solid Wastes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Drying Of Solid Materials (AREA)

Claims (18)

  1. Procédé pour reconnaître et éliminer des irrégularités au cours de la fabrication de panneaux de matériau, dans lequel un flux de matière en train de tomber et/ou de glisser est vérifié après un traitement préparatoire, avant d'être dispersé sur une bande de formage (24), pour rechercher des irrégularités, comprenant les étapes de procédé suivantes :
    1.1 le flux de matière est étalé au moyen d'une goulotte en éventail (2),
    1.2 le flux de matière est ensuite examiné à la recherche d'irrégularités d'une densité supérieure à une densité de régulation paramétrée pour la production de panneaux de matériau,
    1.3 les irrégularités déterminées sont ensuite enlevées et
    1.4 le flux de matière est ensuite guidé vers la suite du traitement,
    caractérisé en ce que l'examen du flux de matière est effectué au moyen d'une exposition à un rayonnement et en ce que l'enlèvement des irrégularités déterminées est effectué en dérivant brièvement une part du flux de matière prise sur la largeur.
  2. Procédé selon la revendication 1, caractérisé en ce qu'entre les étapes de procédé 1.1 et 1.2, les petites particules de fer sont retirées du flux de matière étalé avec un champ magnétique.
  3. Procédé selon la revendication 1, caractérisé en ce qu'avant la mise en oeuvre du procédé, le flux de matière passe dans un séparateur de particules lourdes.
  4. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que des rayons X sont utilisés pour l'exposition du flux de matière à un rayonnement.
  5. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que le flux de matière est desserré avant et/ou après une trémie de dispersion.
  6. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que le flux de matière est étalé sur une largeur de 1 à 8 m.
  7. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que le flux de matière ne présente plus après l'étalement, dans la zone d'exposition au rayonnement, qu'une épaisseur de 10 à 20 cm.
  8. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'afin de dériver brièvement une partie du flux de matière prise sur la largeur, un coup de pression d'air comprimé est introduit dans le flux de matière.
  9. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'afin de dériver brièvement une partie du flux de matière prise sur la largeur, un volet de séparation est introduit dans le flux de matière.
  10. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que le volet de séparation est déplacé au moyen d'un vérin à double action.
  11. Dispositif pour reconnaître et éliminer des irrégularités dans un flux de matière en train de tomber et/ou de glisser au cours de la fabrication de panneaux de matériau, dans lequel une goulotte en éventail (2) est disposée pour étaler le flux de matière,
    dans lequel, pour guider uniformément le flux de matière, un ou plusieurs canaux de guidage (5) à parois extérieures parallèles sont disposés après une goulotte en éventail (2) qui va en s'élargissant,
    caractérisé en ce qu'au début du canal de guidage (5), il est prévu un dispositif d'exposition à un rayonnement (3) pour reconnaître des irrégularités d'une densité supérieure à une densité de régulation paramétrée pour la production de panneaux de matériau et un dispositif d'enlèvement (4) suivant celui-ci à distance pour enlever les irrégularités,
    le dispositif d'enlèvement (4) étant formé de buses pneumatiques disposées par segments sur la largeur, ou
    le dispositif d'enlèvement (4) étant formé de volets de séparation (15) disposés par segments sur la largeur du canal de guidage (5).
  12. Dispositif selon la revendication 11, caractérisé en ce que le dispositif d'enlèvement (4) est associé à une zone d'évacuation (14) avec un dispositif d'évacuation (18).
  13. Dispositif selon une ou plusieurs des revendications 11 à 12, caractérisé en ce qu'un séparateur magnétique (10) est disposé entre la goulotte en éventail (2) et le canal de guidage (5).
  14. Dispositif selon une ou plusieurs des revendications 11 à 13, caractérisé en ce que qu'en vue du guidage par sections sur la largeur du flux de matière, des tôles de guidage (6) sont disposées pour former plusieurs canaux de guidage (5).
  15. Dispositif selon une ou plusieurs des revendications 11 à 14, caractérisé en ce que le flux de matière est desserré au moyen d'un ou plusieurs rouleaux de dissociation (21).
  16. Dispositif selon une ou plusieurs des revendications 11 à 15, caractérisé en ce qu'un dispositif d'évacuation (18) est prévu pour extraire le matériau enlevé de la zone d'évacuation (14).
  17. Dispositif selon une ou plusieurs des revendications 11 à 16, caractérisé en ce que le dispositif d'évacuation (18) est formé par un convoyeur à vis sans fin (19).
  18. Dispositif selon une ou plusieurs des revendications 11 à 17, caractérisé en ce qu'à partir de l'écluse à roue cellulaire (1), une isolation thermique des dispositifs est prévue pour éviter la condensation d'eau sur les parois intérieures des canaux de guidage (5).
EP07019289.3A 2006-10-02 2007-10-01 Procéde et appareil pour la detection et l'elimination de défauts dans un flux de matiere, dans la fabrication de panneaux Not-in-force EP1908563B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07019289T PL1908563T3 (pl) 2006-10-02 2007-10-01 Sposób i urządzenie do stwierdzania i oddzielania nieprawidłowości z przemieszczanego strumienia materiału w trakcie wytwarzania płyt materiałowych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006047002A DE102006047002A1 (de) 2006-10-02 2006-10-02 Verfahren, Vorrichtung und Anlage zum Feststellen und Ausscheiden von Unregelmäßigkeiten aus einem bewegten Materialstrom im Zuge der Herstellung von Werkstoffplatten

Publications (3)

Publication Number Publication Date
EP1908563A2 EP1908563A2 (fr) 2008-04-09
EP1908563A3 EP1908563A3 (fr) 2009-05-06
EP1908563B1 true EP1908563B1 (fr) 2014-12-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07019289.3A Not-in-force EP1908563B1 (fr) 2006-10-02 2007-10-01 Procéde et appareil pour la detection et l'elimination de défauts dans un flux de matiere, dans la fabrication de panneaux

Country Status (4)

Country Link
EP (1) EP1908563B1 (fr)
CN (1) CN101157242B (fr)
DE (1) DE102006047002A1 (fr)
PL (1) PL1908563T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064339A1 (de) * 2010-12-29 2012-07-05 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zur Benetzung von Streugut insbesondere von Fasern und/oder Spänen, mit einem Fluid
DE102020007785A1 (de) 2020-12-18 2022-06-23 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zur Reinigung eines Materialstroms, insbesondere im Zuge der Herstellung von Werkstoffplatten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL110017C (fr) * 1960-06-11
FI212973A7 (fr) * 1973-07-02 1975-01-03 Enwe Oy
EP0233389A1 (fr) * 1986-02-12 1987-08-26 Josef W. Repsch Méthode de mesure du poids par unité de surface, de la densité et de l'épaisseur d'une bande en défilement
DE3766247D1 (de) * 1987-05-23 1990-12-20 Schenck Ag Carl Verfahren zum streuen eines spaenevlieses.
DE19916447A1 (de) * 1999-04-12 2000-10-19 Dieffenbacher Schenck Panel Formstation
DE10101380B4 (de) * 2001-01-13 2008-12-24 Dieffenbacher Gmbh + Co. Kg Sichterbeschickungungsstrecke bei Anlagen zur Herstellung von Holzfaserplatten
GB0210215D0 (en) * 2002-05-03 2002-06-12 K C Shen Internat Ltd Method for making dimensionally stable composite products from lignocelluloses
CN1315624C (zh) * 2003-11-12 2007-05-16 北京梦狐服饰科技开发有限责任公司 利用竹材生产再生纤维素纤维及副产品工艺方法

Also Published As

Publication number Publication date
EP1908563A3 (fr) 2009-05-06
DE102006047002A1 (de) 2008-04-03
CN101157242B (zh) 2013-06-19
CN101157242A (zh) 2008-04-09
PL1908563T3 (pl) 2015-05-29
EP1908563A2 (fr) 2008-04-09

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