EP2563558B1 - Vorrichtung zur injektion chemischer komponenten in einen strom aus losen holzmaterialien - Google Patents

Vorrichtung zur injektion chemischer komponenten in einen strom aus losen holzmaterialien Download PDF

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Publication number
EP2563558B1
EP2563558B1 EP11714342.0A EP11714342A EP2563558B1 EP 2563558 B1 EP2563558 B1 EP 2563558B1 EP 11714342 A EP11714342 A EP 11714342A EP 2563558 B1 EP2563558 B1 EP 2563558B1
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EP
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Prior art keywords
tubular body
wooden material
internal wall
flow
respect
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Application number
EP11714342.0A
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English (en)
French (fr)
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EP2563558A1 (de
Inventor
Paolo Benedetti
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Imal SRL
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Imal SRL
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    • 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
    • B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles

Definitions

  • the present invention relates to an apparatus for injecting chemical components into a flow of loose wooden material.
  • This mixing step evens out the distribution of the chemical components in the mass of loose wooden material within special mixers so as to obtain a smooth paste.
  • the injection of the chemical components can occur directly within the mixer or, more preferably, upstream of the inlet into the mixer to obtain a pre-mixing of the particles of wooden material and of the chemical components.
  • the system comprises a device for feeding loose wooden material, which is associated with the inlet of a mixer via the interposition of a hopper which is provided internally with nozzles for injecting adhesive directly into the flow of wooden material that passes through it.
  • the aim of the present invention is to eliminate the above-mentioned drawbacks of the known art, by providing an apparatus for injecting chemical components into a flow of loose wooden material, which solves the problem of smearing of the region in which the injection of the chemical components is performed, and in particular the injection of the adhesive, generally of the thermosetting type, without necessitating auxiliary apparatuses for the delivery of air under pressure upstream of the injection region and the aspiration of air downstream of that region.
  • an object of the present invention is to prevent the formation of lumps in the paste of loose wooden material and chemical components being processed.
  • a further object of the present invention is to be easily applied even on mixing systems that are already installed.
  • a further object of the present invention is to provide a simple structure, that is easy and practical to implement, safe to use and effective in operation, and has relatively low costs.
  • the present apparatus for injecting chemical components into a flow of loose wooden material comprising a tubular body which is provided with at least one inlet, which can be associated with means for feeding loose wooden material, and with at least one outlet, which can be associated with a mixer, and which is crossed internally by a flow of said loose wooden material from the inlet toward the outlet, and means for injecting at least one chemical component toward the flow of loose wooden material, which are associated internally with respect to said tubular body, characterized in that it comprises scraper means which are associated with the internal wall of said tubular body and can move tangentially with respect to it, means being further provided for actuation with a relative motion of at least one of the tubular body and the scraper means with respect to each other.
  • the reference numeral 1 generally indicates an apparatus for injecting chemical components into a flow of loose wooden material.
  • the apparatus 1 can be used in order to achieve the pre-mixing of adhesive substances and additives in general with particles (chips, shavings, fibers etc.) of wooden material in plants for producing panels of chipboard, MDF (Medium Density Fibreboard), OSB (Oriented Strand Board) and the like.
  • particles chips, shavings, fibers etc.
  • MDF Medium Density Fibreboard
  • OSB Oriented Strand Board
  • the apparatus 1 comprises a tubular body 2 that extends along a longitudinal axis A, is provided with at least one inlet 3 and with at least one outlet 4 and is crossed internally by a flow of loose wooden material, represented by the arrow indicated with the letter F in the figures, from the inlet toward the outlet.
  • the apparatus 1 Under operating conditions, the apparatus 1 is positioned with its longitudinal axis A not horizontal, and preferably vertical, so that the inlet 3 is arranged above the outlet 4 and the flow F crosses it by falling as a result of the force of gravity.
  • the apparatus 1 is designed to be installed with the inlet 3 connected to the outlet of conventional means of feeding loose wooden material, of the type of a conventional dosage apparatus D, not described in detail, and the outlet 4 connected to the inlet of a mixer M of a known type, which is also not described in detail.
  • the apparatus 1 comprises, furthermore, means 5 for injecting at least one chemical component toward the flow F of loose wooden material, which are supported by and inside the tubular body 2.
  • the injection means 5 include at least one injector nozzle 6 supported by the inner wall 7 of the tubular body 2, preferably in proximity to the inlet 3 and directed toward the longitudinal axis A.
  • the injection means 5 include, moreover, a system for feeding the at least one chemical component to be distributed in the flow F of loose wooden material, which is not described in detail.
  • the injection means 5 include a plurality of nozzles 6 (of which only two are shown) distributed along a section of the tubular body 2 at right angles to the longitudinal axis A in proximity to the inlet 3, but alternative arrangements of the nozzles 6 are not excluded.
  • the apparatus 1 comprises, furthermore, scraper means 8 which are associated with the internal wall 7 and can move tangentially with respect to it in order to clean it from any deposits of chemical component and means 9 for actuation with a relative motion of at least one of the tubular body 2 and the scraper means 8 with respect to each other.
  • actuation means 9 preferably operate continuously so as to perform the cleaning over the entire operation of the apparatus 1 and to prevent the buildup of solid deposits of non-negligible size on the internal wall 7 which, occasionally introduced into the mixer M, could give rise to the formation of lumps in the paste being processed.
  • the actuation means 9 could function intermittently and be activated on command by an operator.
  • the scraper means 8 include at least one spatula 10 which is positioned substantially in contact with the internal wall 7 and can move tangentially with respect to it so as to scrape at least a portion thereof.
  • the phrase "substantially in contact” is intended to mean that the spatula 10 can be positioned directly in contact with the internal wall 7 or be kept spaced therefrom by a minimal gap (of the order of a few tenths of a millimetre) according to the requirements of the application.
  • the scraper means 8 include a plurality of spatulas 10.
  • the actuation means 9 actuate the rotation of at least one of the tubular body 2 and the spatulas 10 about the longitudinal axis A.
  • the tubular body 2 has a frustum-shaped configuration that tapers toward the outlet 4 so as to define a common hopper and the scraper means 8 comprise a supporting structure for three spatulas 10, each of which are mutually angularly spaced by 120° and lie along respective generatrices of the tubular body 2.
  • the supporting structure includes two rings, an upper ring 11 and a lower ring 12, which are rigidly connected to the spatulas 10. The possibility is not excluded of connecting the spatulas 10 to the rings 11 and 12 via the interposition of elastically yielding elements so as to prevent shocks from occurring should the spatulas 10 encounter deposits of chemical components on the internal wall which resist the detachment action.
  • the spatulas 10 extend downstream of the nozzles 6, in the direction in which the tubular body 2 is crossed by the flow F of loose wooden material, up to the vicinity of the outlet 4.
  • the actuation means 9 are constituted by an electric motor 13, supported externally by the tubular body 2, for the actuation in rotation, about a vertical axis, of a pinion 14 engaged by a first annular element 15 with internal toothing, which is arranged perpendicular to the longitudinal axis A and is rigidly connected to the upper ring 11.
  • a second annular element 16 is also provided, which is rigidly connected to the tubular body 2 and is arranged externally to the first annular element 15.
  • rolling elements 17 are interposed so as to constitute a form of bearing.
  • the first annular element 15 is, therefore, freely rotatable about the longitudinal axis A with respect to the second annular element 16 and with respect to the entire tubular body 2.
  • actuation means 9 can also actuate the tubular body 2 in rotation about the longitudinal axis A, in the opposite direction with respect to the scraper means 8.
  • the scraper means 8 can move with respect to the tubular body 2 with an alternating translational motion tangentially to at least one of the faces that form the wall itself.
  • the apparatus 1 can comprise cooling means 18 which are associated with the internal wall 7 and/or with the scraper means 8 so as to achieve a temperature of the corresponding surfaces that is substantially lower than the temperature of the flow F of loose wooden material.
  • the temperature of these surfaces is kept at a value that is close to the condensation temperature of the humidity carried by the flow F and/or of the surrounding environment. In this way the condensation of part of the humidity is caused so as to achieve the formation of a thin film of condensate on the cooled surfaces.
  • This effect reduces the adhesive power of the chemical components, and particularly of thermosetting glues, on the internal wall 7 thus facilitating the cleaning with the scraper means 8 and it also makes it possible to keep the spatulas 10 clean.
  • the cooling means comprise at least one chamber 18 for the passage of a cooling fluid, such as water, the chamber 18 being associated with the surface to be cooled.
  • a cooling fluid such as water
  • cooling means 18 are provided exclusively for the internal wall 7, and the chamber 18 is defined by an interspace formed within the thickness of the tubular body 2 and is annular in shape.
  • these cooling means can include a chamber for the passage of a cooling fluid which is formed within the spatulas 10 and a system for supplying the fluid which can move with the scraper means 8. In this way it is possible to prevent the formation of deposits of chemical components on the spatulas 10 as well.
  • the loose wooden material is dosed and released by the feeding means D at the inlet 3.
  • the loose wooden material longitudinally crosses the tubular body 2, exits from the outlet 4 and enters the mixer M.
  • the injection means 5 distribute, into the flow F of loose wooden material, preset quantities of one or more chemical components, such as adhesives and additives.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Catching Or Destruction (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (9)

  1. Eine Vorrichtung (1) zur Injektion chemischer Komponenten in einen Strom aus losem Holzmaterial, Folgendes umfassend:
    - einen rohrförmigen Körper (2), der mit mindestens einem Einlass (3) ausgestattet ist, welcher mit Mitteln (D) zum Zuführen von losem Holzmaterial verbunden werden kann, und mit mindestens einem Auslass (4), der mit einem Mischer (M) verbunden werden kann und innen von einem Strom, flow - F - des losen Holzmaterials vom Einlass (3) zum Auslass (4) durchströmt wird, und
    - Mittel (5) zum Injizieren mindestens einer chemischen Komponente in den Strom (F) von losem Holzmaterial, die innen mit dem rohrförmigen Körper (2) verbunden sind,
    dadurch gekennzeichnet, dass sie Abstreifermittel (8) umfasst, die mit der Innenwand (7) des rohrförmigen Körpers (2) verbunden sind und sich tangential im Verhältnis dazu bewegen können, wobei weiter Mittel (9) für den Antrieb mit einer Relativbewegung des rohrförmigen Körpers (2) und/oder der Abstreifermittel (8) im Verhältnis zueinander bereitgestellt sind.
  2. Die Vorrichtung (1) gemäß Anspruch 1, dadurch gekennzeichnet, dass sie Kühlmittel (18) umfasst, die mit der Innenwand (7) und/oder mit den Abstreifermitteln (8) verknüpft sind, um für eine Temperatur der entsprechenden Oberflächen zu sorgen, die wesentlich niedriger ist als die Temperatur des Stroms (F) von losem Holzmaterial.
  3. Die Vorrichtung (1) gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abstreifermittel (8) mindestens einen Spatel (10) umfassen, der im Wesentlichen in Kontakt mit der Innenwand (7) angeordnet ist und sich tangential im Verhältnis zu ihr bewegen kann, um mindestens einen Teil davon abzuschaben.
  4. Die Vorrichtung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Innenwand (7) eine axialsymmetrische Form mit Bezug auf ihre eigene Längsachse (A) hat, wobei die Antriebsmittel (9) ausgebildet sind, um die Drehung des rohrförmigen Körpers (2) und/oder der Abstreifermittel (8) um die Längsachse (A) auszulösen.
  5. Die Vorrichtung gemäß Anspruch 3 und 4, dadurch gekennzeichnet, dass die Innenwand (7) eine kegelstumpfförmige Konfiguration hat, die sich zu dem Auslass (4) hin verjüngt, und dadurch, dass der mindestens eine Spatel (10) entlang einer Erzeugenden des Körpers angeordnet ist, wobei die Antriebsmittel (9) die Drehung zumindest der Abstreifermittel (8) um die Längsachse (A) auslösen, um mindestens einen Bund der Innenwand (7) zu reinigen.
  6. Die Vorrichtung (1) gemäß einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der rohrförmige Körper (2) einen Querschnitt, transversal zu seiner eigenen Längsachse (A), hat, der im Wesentlichen vieleckig ist, und die Abstreifermittel (8) sich mit einer alternierenden Translationsbewegung mit Bezug auf das Element bewegen können, tangential zu mindestens einer der Flächen, die die Innenwand (7) bestimmen.
  7. Die Vorrichtung (1) gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die Kühlmittel mindestens eine Kammer (18) für den Durchfluss eines Kühlfluids umfassen, die mit dem rohrförmigen Körper (2) verbunden ist.
  8. Die Vorrichtung (1) gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die Injektionsmittel (5) mindestens eine Einspritzdüse (6) umfassen, die von der Innenwand (7) getragen wird.
  9. Die Vorrichtung (1) gemäß Anspruch 8, dadurch gekennzeichnet, dass die mindestens eine Düse (6) nahe dem Einlass (3) angeordnet ist, wobei die Abstreifermittel (8) stromabwärts von der mindestens einen Düse (6) in der Richtung angeordnet sind, in welcher der rohrförmige Körper (2) von dem Strom (F) losen Holzmaterials durchströmt wird.
EP11714342.0A 2010-04-30 2011-04-19 Vorrichtung zur injektion chemischer komponenten in einen strom aus losen holzmaterialien Active EP2563558B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO2010A000132A IT1399772B1 (it) 2010-04-30 2010-04-30 Apparato per l'iniezione di componenti chimici in un flusso di materiale legnoso incoerente
PCT/EP2011/056243 WO2011134844A1 (en) 2010-04-30 2011-04-19 Apparatus for injecting chemical components into a flow of loose wooden material

Publications (2)

Publication Number Publication Date
EP2563558A1 EP2563558A1 (de) 2013-03-06
EP2563558B1 true EP2563558B1 (de) 2018-06-20

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EP11714342.0A Active EP2563558B1 (de) 2010-04-30 2011-04-19 Vorrichtung zur injektion chemischer komponenten in einen strom aus losen holzmaterialien

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EP (1) EP2563558B1 (de)
CN (1) CN102947065B (de)
DE (1) DE202011110504U1 (de)
IT (1) IT1399772B1 (de)
WO (1) WO2011134844A1 (de)

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DE102019114039A1 (de) * 2019-05-26 2020-11-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Beleimung von Partikeln im Zuge der Herstellung von Werkstoffplatten und ein Verfahren zum Betreiben der Vorrichtung

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DE102012111307A1 (de) * 2012-11-22 2014-05-22 Dieffenbacher GmbH Maschinen- und Anlagenbau Fallschachtanordnung mit zweifacher Reinigungseinrichtung, insbesondere für eine Vorrichtung zur Beleimung von Partikeln im Zuge der Herstellung von Werkstoffplatten
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DE102013104653A1 (de) * 2013-05-06 2014-11-06 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zur Beleimung von Partikeln, bevorzugt im Zuge der Herstellung von Werkstoffplatten
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Publication number Priority date Publication date Assignee Title
US1366777A (en) 1920-01-08 1921-01-25 Nat Aniline & Chem Co Inc Combined scraper and agitator
DE2847982A1 (de) 1977-11-09 1979-05-10 Fahrni Peter Durchlaufmischer zum beleimen von losen holzspaenen, fasern oder anderen teilchen
EP0046569A2 (de) 1980-08-26 1982-03-03 Draiswerke GmbH Verfahren und Vorrichtung zum Mischen von Feststoffen mit Flüssigkeiten
US4515483A (en) 1982-08-16 1985-05-07 Schering Aktiengesellschaft Apparatus for removing substances from the inner walls of vessels
DE3717627A1 (de) 1986-06-19 1987-12-23 Cabot Corp Regulierung der foerderrate von russ in eine perlmaschine
DE3728123A1 (de) 1987-08-22 1989-03-02 Hoechst Ag Verfahren zur herstellung von zerfasertem zellulosematerial, insbesondere holzfasern, fuer die herstellung von faserplatten
EP0728562A2 (de) 1995-02-23 1996-08-28 Carl Schenck Ag Verfahren und Vorrichtung zum Benetzen von Partikeln mit einem Fluid
DE19930800A1 (de) 1998-08-05 2000-02-17 Fraunhofer Ges Forschung Verfahren zur Herstellung von MDF-Platten
DE60100242T2 (de) 2000-03-17 2003-11-27 Sancassiano Spa Spiralförmige Knetmaschine mit nichtverdrehbarem Behälter zur Zubereitung von Gemisch auf Mehlbasis
DE10104047A1 (de) 2001-01-31 2002-08-14 Johann Leonhartsberger Vorrichtung zur Trockenbeleimung von Teilchen in Form von Fasern und Spänen
DE10139966C2 (de) 2001-08-01 2003-12-04 Kronospan Tech Co Ltd MDF-Platte nebst Herstellung
DE10226820B3 (de) 2002-06-15 2004-04-01 Flakeboard Company Limited, St.Stephen Verfahren und Vorrichtung zum Beleimen von zur Herstellung von Faserplatten vorgesehenen, getrockneten Fasern
EP1468799A2 (de) 2003-04-15 2004-10-20 Imal S.R.L. Verfahren und Vorrichtung für Zugabe von Klebemittel zur einem Strom aus losem Holzmaterial
EP1504865A2 (de) 2003-08-05 2005-02-09 Maschinenfabrik J. Dieffenbacher GmbH & Co. Verfahren und Vorrichtung zum Benetzen von rieselförmigen Gütern mit einem Bindemittel
DE10347052A1 (de) 2003-10-07 2005-05-04 Schenkmann Piel Engineering Gm Verfahren zur Herstellung von Faserplatten aus Holzfasern
EP1787713A1 (de) 2005-11-18 2007-05-23 Valmar Global VSE ZA Sladoled D.O.O. Elément mélangeur pour mixeur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019114039A1 (de) * 2019-05-26 2020-11-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Beleimung von Partikeln im Zuge der Herstellung von Werkstoffplatten und ein Verfahren zum Betreiben der Vorrichtung
WO2020239727A1 (de) 2019-05-26 2020-12-03 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur beleimung von partikeln im zuge der herstellung von werkstoffplatten und ein verfahren zum betreiben der vorrichtung

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EP2563558A1 (de) 2013-03-06
WO2011134844A1 (en) 2011-11-03
IT1399772B1 (it) 2013-05-03
ITMO20100132A1 (it) 2011-10-31
CN102947065A (zh) 2013-02-27
DE202011110504U1 (de) 2014-05-15
CN102947065B (zh) 2016-02-24

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