WO2006114153A1 - Veneer dryer - Google Patents

Veneer dryer Download PDF

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Publication number
WO2006114153A1
WO2006114153A1 PCT/EP2006/002105 EP2006002105W WO2006114153A1 WO 2006114153 A1 WO2006114153 A1 WO 2006114153A1 EP 2006002105 W EP2006002105 W EP 2006002105W WO 2006114153 A1 WO2006114153 A1 WO 2006114153A1
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WO
WIPO (PCT)
Prior art keywords
veneers
cooling
belts
drying
belt
Prior art date
Application number
PCT/EP2006/002105
Other languages
German (de)
French (fr)
Inventor
Burkhard Behrend
Gatzka GÜNTER
Original Assignee
Grenzebach Bsh Gmbh
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 Grenzebach Bsh Gmbh filed Critical Grenzebach Bsh Gmbh
Publication of WO2006114153A1 publication Critical patent/WO2006114153A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/14—Veneer, i.e. wood in thin sheets

Definitions

  • the invention relates to a device for drying veneers according to the preamble of claim 1.
  • the veneer dryers have so-called ironing zones, in which the veneers are smoothed as far as possible. It can not always be avoided that the veneers are curved in particular transversely to the fiber direction.
  • a dryer for sliced veneers in which the veneers are dried between two conveyor belts, first in a part with a straight guide and then in a part with a loop-shaped guide of the conveyor belts.
  • the dryer is subdivided into dry fields, which, individually or in combination, can form drying zones with the required dry climate.
  • the drying fields are followed by a cooling device with separate conveyor belts, in which the veneers are transported largely in a straight line, that is without deflections.
  • a cooling device with separate conveyor belts, in which the veneers are transported largely in a straight line, that is without deflections.
  • brush rollers for the transfer of the veneers from the drying device to the cooling device.
  • the known devices have the disadvantage that again and again - especially curved - veneers are not transported at the transition between the first and the second transport device and fall through down. These fallen veneers must be removed regularly and are no longer useful.
  • the object of the invention is to provide a device for drying veneers, in which the veneers are transported safely from the first to the second transport device.
  • the object is solved by the features of claim 1. Characterized in that in an area between the drying device and the cooling device, an upper of the bands of a transport device with a small vertical distance is guided over a lower of the bands of the other transport device and that in the area immediately above a lower strand of the upper band of a transport device down is arranged, the veneers are removed in the critical area between the transport devices through the upper belt of a lower conveyor belt and placed on a lower cooling belt.
  • the veneers are safe through kept the negative pressure of the suction box on the upper band, so that falling through of veneers is largely avoided. This accordingly increases the productivity of the apparatus for drying and reduces the labor because no veneers need to be removed from the area between the first and second transport devices and disposed of.
  • the upper band is either an upper conveyor belt or an upper cooling belt.
  • the subclaims relate to the advantageous embodiment of the invention.
  • the upper conveyor belt When the upper cooling belt is passed over the lower conveyor belt, the upper conveyor belt is guided over a shorter distance from the drying device, so that it cools less and thus saves energy.
  • a cross-flow fan has proved to be particularly advantageous for the generation of the negative pressure in the suction box.
  • FIGURE shows a longitudinal section through a part of a device according to the invention
  • a device for drying comprises a drying device 1 and a cooling device 2.
  • the drying device 1 is constructed like a box from a plurality of fields 3 and surrounded by a first housing 4. " A first drivable transport device for veneers 7 is guided by the drying device 1 in such a way that it passes through the fields 3 one after the other in the general transport direction according to arrow 5.
  • the first transport device comprises a lower and an upper conveyor belt 6.1, 6.2, which are endless, one above the other and between which the veneers 7 can be conveyed from an inlet to a dryer outlet An upper run of the lower conveyor belt 6.1 protrudes approximately horizontally out of the first housing 4 at the entrance and at the dryer outlet returned separately to the entrance.
  • Each panel 3 is associated with means for inflating treatment gas onto the veneers.
  • the cooling device 2 is constructed from at least one field 3, which is surrounded by a second housing 8, and a second transport device.
  • This comprises a lower and an upper cooling belt 9.1, 9.2, which are endless, one above the other and between which the veneers are conveyed from a radiator inlet to an outlet.
  • the cooling belts 9.1, 9.2 are guided from the radiator inlet to the outlet so that an upper run of the lower cooling belt 9.1 protrudes horizontally from the second housing 8 at the radiator inlet and at the outlet for a certain distance.
  • the two cooling belts 9.1, 9.2 are returned separately to the radiator inlet.
  • the lower conveyor belt 6.1 and the lower cooling belt 9.1 are guided between the dryer outlet and the radiator inlet in a substantially horizontal plane and as close as possible to each other deflected to facilitate a transfer from the lower conveyor belt 6.1 to the lower cooling belt 9.1.
  • the upper cooling belt 9.2 protrudes in the area between the dryer outlet and the radiator inlet from the second housing 8 in the direction of the drying device 1 so that a lower run of the upper cooling belt 9.2 is largely parallel to the upper runs of the lower belts 6.1, 9.1 and for a specific one Distance to over the upper run of the lower conveyor belt 6.1 runs. This means that the upper cooling belt 9.2 bridges a gap between the lower conveyor belt 6.1 and the lower cooling belt 9.1.
  • a suction box 10 is arranged directly above the lower run of the upper cooling belt 9.2, which extends in its length over the width of the upper cooling belt 9.2.
  • the width of the suction box 10 is dimensioned so that it covers at least the vertices of the deflections of the lower bands 6.1, 9.1.
  • sealing strips 11 are arranged between the suction box 10 and the upper cooling belt 9.2 sealing strips 11 are arranged.
  • a cross-flow fan 12 is attached so as to extend over the length thereof.
  • the cross-flow fan 12 is coupled to a drive.
  • the conveyor belts 6.1, 6.2 and the cooling belts 9.1, 9.2 are e.g. designed as a screen belts, preferably as wide-spiral wire link belts.
  • means for blowing treatment gas are arranged, comprising at least one fan and channels for conducting the treatment gas.
  • the veneers 7, which are sheet-shaped with a thickness of e.g. 0.2 to 4.0 mm are cut from a block of wood, given at the entrance one behind the other on the upper run of the driven lower conveyor belt 6.1.
  • the veneers 7 are largely flat on the lower conveyor belt 6.1.
  • the drying takes place in the drying apparatus 2 as known.
  • the cooling belts 9.1, 9.2 are driven.
  • the speed of the cooling belts 9.1, 9.2 corresponds at least to the speed of the conveyor belts 6.1, 6.2.
  • the cooling is done as known.
  • the veneers 7 are removed from the lower cooling belt 9.1 and stacked.
  • the veneers 7 are transferred from the lower conveyor belt 6.1 to the lower cooling belt 9.1.
  • the Veneiere.7 be promoted on the upper run of the lower conveyor belt 6.1 until they reach the effective range of the negative pressure generated by the driven cross-flow fan 12 in the suction box 10.
  • This negative pressure sucks the veneers 7 one after the other against the underside of the upper cooling belt 9.2, the veneers 7 on the underside being adhesively conveyed further in the direction of the cooling device 2.
  • the veneers 7 are held smoothly on the upper cooling belt 9.2, whereby the transport is particularly safe.
  • the veneers 7 leave the area of action of the negative pressure, they are, as is known, transported further between the cooling belts 9.1, 9.2 and treated.

Abstract

The invention relates to a device for drying veneers, wherein the latter are conveyed between two belts. Generic dryers are problematic in that the veneers are not reliably transported from a drying device to a downstream cooling device, a reason being, e.g., that the veneers partially warp at an angle to the grain and therefore fall through during transition from a lower conveyor belt to a lower cooling belt. The aim of the invention is therefore to provide a reliable further transport during transition. For this purpose, in an area between the drying device (1) and the cooling device (2), a topmost of the belts (6.2, 9.2) of the one transport device is guided at a small vertical distance across a lowest of the belts (6.1, 9.1) of the other transport device and a suction box (10) with a downward effect is mounted in said area, directly above a lower strand of the upper belt (6.2, 9.2) of the one transport device.

Description

Furniertrockner veneer dryer
Die Erfindung betrifft eine Vorrichtung zum Trocknen von Furnieren gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for drying veneers according to the preamble of claim 1.
Messerfurniere neigen beim Trocknen dazu, sich wegen unterschiedlicher Schrumpfungs- grade zu verformen. Um dies zu vermeiden, weisen die Furniertrockner sogenannte Bügelzonen auf, in denen die Furniere weitestgehend geglättet werden. Hierbei lässt es sich nicht immer vermeiden, dass die Furniere insbesondere quer zur Faserrichtung gewölbt sind.Sliced veneers tend to deform during drying due to different degrees of shrinkage. To avoid this, the veneer dryers have so-called ironing zones, in which the veneers are smoothed as far as possible. It can not always be avoided that the veneers are curved in particular transversely to the fiber direction.
Aus der EP 192 207 B1 ist ein Trockner für Messerfurniere bekannt, bei dem die Furniere zwischen zwei Transportbändern zunächst in einem Teil mit geradliniger Führung und an- schließend in einem Teil mit schleifenförmiger Führung der Transportbänder getrocknet werden. Der Trockner ist in Trockenfelder unterteilt, die einzeln oder mehrere zusammen- gefasst Trocknungszonen mit dem erforderlichen Trockenklima bilden können. An die Trockenfelder schließt sich eine Kühlvorrichtung mit separaten Transportbändern an, in dem die Furniere weitgehend geradlinig, das heißt ohne Umlenkungen transportiert werden. Für die Übergabe der Furniere von der Trockenvorrichtung zur Kühlvorrichtung ist es bekannt, Bürstenwalzen einzusetzen, um die Furniere von der ersten zur zweiten Transportvorrichtung zu transportieren.From EP 192 207 B1, a dryer for sliced veneers is known in which the veneers are dried between two conveyor belts, first in a part with a straight guide and then in a part with a loop-shaped guide of the conveyor belts. The dryer is subdivided into dry fields, which, individually or in combination, can form drying zones with the required dry climate. The drying fields are followed by a cooling device with separate conveyor belts, in which the veneers are transported largely in a straight line, that is without deflections. For the transfer of the veneers from the drying device to the cooling device, it is known to use brush rollers to transport the veneers from the first to the second transport device.
Die bekannten Vorrichtungen haben den Nachteil, dass immer wieder - insbesondere gewölbte - Furniere beim Übergang zwischen der ersten und der zweiten Transportvorrichtung nicht weiter transportiert werden und nach unten durchfallen. Diese durchgefallenen Furniere müssen regelmäßig entfernt werden und sind nicht mehr zu gebrauchen.The known devices have the disadvantage that again and again - especially curved - veneers are not transported at the transition between the first and the second transport device and fall through down. These fallen veneers must be removed regularly and are no longer useful.
Aufgabe der Erfindung ist es, eine Vorrichtung zum Trocknen von Furnieren zu schaffen, bei der die Furniere sicher von der ersten zur zweiten Transportvorrichtung transportiert werden. Die Aufgabe ist durch die Merkmale des Anspruchs 1 gelöst. Dadurch dass in einem Bereich zwischen der Trockenvorrichtung und der Kühlvorrichtung ein oberes der Bänder der einen Transportvorrichtung mit geringem vertikalem Abstand über ein unteres der Bänder der anderen Transportvorrichtung geführt ist und dass in dem Bereich unmittelbar über einem Untertrum des oberen Bands der einen Transportvorrichtung ein nach unten wirken- der Saugkasten angeordnet ist, werden die Furniere in dem kritischen Bereich zwischen den Transportvorrichtungen durch das obere Band von einem unteren Transportband abgenommen und auf ein unteres Kühlband gebracht. Hierbei werden die Furniere sicher durch den Unterdrück des Saugkastens an dem oberen Band gehalten, so dass ein Durchfallen von Furnieren weitestgehend vermieden wird. Dies erhöht entsprechend, die Produktivität der Vorrichtung zum Trocknen und vermindert den Arbeitsaufwand, weil keine Furniere aus dem Bereich zwischen der ersten und der zweiten Transportvorrichtung entfernt und entsorgt werden müssen.The object of the invention is to provide a device for drying veneers, in which the veneers are transported safely from the first to the second transport device. The object is solved by the features of claim 1. Characterized in that in an area between the drying device and the cooling device, an upper of the bands of a transport device with a small vertical distance is guided over a lower of the bands of the other transport device and that in the area immediately above a lower strand of the upper band of a transport device down is arranged, the veneers are removed in the critical area between the transport devices through the upper belt of a lower conveyor belt and placed on a lower cooling belt. Here, the veneers are safe through kept the negative pressure of the suction box on the upper band, so that falling through of veneers is largely avoided. This accordingly increases the productivity of the apparatus for drying and reduces the labor because no veneers need to be removed from the area between the first and second transport devices and disposed of.
Das obere Band ist entweder ein oberes Transportband oder ein oberes Kühlband. Die Unteransprüche betreffen die vorteilhafte Ausgestaltung der Erfindung.The upper band is either an upper conveyor belt or an upper cooling belt. The subclaims relate to the advantageous embodiment of the invention.
Wenn das obere Kühlband über das untere Transportband geführt ist, wird das obere Transportband über eine kürzere Strecke aus der Trockenvorrichtung geführt, so dass es weniger stark abkühlt und so Energie eingespart wird.When the upper cooling belt is passed over the lower conveyor belt, the upper conveyor belt is guided over a shorter distance from the drying device, so that it cools less and thus saves energy.
Ein Querstromventilator hat sich für die Erzeugung des Unterdrucks in dem Saugkasten als besonders vorteilhaft erwiesen.A cross-flow fan has proved to be particularly advantageous for the generation of the negative pressure in the suction box.
Die Erfindung wird anhand des in der Zeichnung schematisch dargestellten Ausführungsbeispiels weiter erläutert. Die einzige Figur zeigt einen Längsschnitt durch einen Teil einer, er- findungsgemäße VorrichtungThe invention will be further explained with reference to the embodiment shown schematically in the drawing. The single FIGURE shows a longitudinal section through a part of a device according to the invention
Wie aus der Figur ersichtlich umfasst eine Vorrichtung zum Trocknen eine Trocknungsvorrichtung 1 und eine Kühlvorrichtung 2.As shown in the figure, a device for drying comprises a drying device 1 and a cooling device 2.
Die Trocknungsvorrichtung 1 ist baukastenartig aus einer Vielzahl von Feldern 3 aufgebaut und von einem ersten Gehäuse 4 umgeben. "Durch die Trocknungsvorrichtung 1 ist eine erste antreibbare Transportvorrichtung für Furniere 7 so geführt, dass sie in genereller Transportrichtung gemäß Pfeil 5 nacheinander die Felder 3 durchläuft. Die erste Transportvorrichtung umfasst ein unteres und ein oberes Transportband 6.1 , 6.2, die endlos sind, übereinander liegen und zwischen denen die Furniere 7 von einem Eingang zu einem Trocknerausgang förderbar sind. Ein Obertrum des unteren Transportbands 6.1 ragt am Eingang und am Trocknerausgang für eine kurze Strecke aus dem ersten Gehäuse 4 in etwa waagerecht heraus. Am Trocknerausgang sind die beiden Transportbänder 6.1 , 6.2 separat zum Eingang zurückgeführt.The drying device 1 is constructed like a box from a plurality of fields 3 and surrounded by a first housing 4. " A first drivable transport device for veneers 7 is guided by the drying device 1 in such a way that it passes through the fields 3 one after the other in the general transport direction according to arrow 5. The first transport device comprises a lower and an upper conveyor belt 6.1, 6.2, which are endless, one above the other and between which the veneers 7 can be conveyed from an inlet to a dryer outlet An upper run of the lower conveyor belt 6.1 protrudes approximately horizontally out of the first housing 4 at the entrance and at the dryer outlet returned separately to the entrance.
Jedem Feld 3 sind Mittel zum Aufblasen von Behandlungsgas auf die Furniere zugeordnet.Each panel 3 is associated with means for inflating treatment gas onto the veneers.
Die Kühlvorrichtung 2 ist aus mindestens einem Feld 3 aufgebaut, das von einem zweiten Gehäuse 8 umgeben ist, und eine zweite Transportvorrichtung. Diese umfasst ein unteres und ein oberes Kühlband 9.1 , 9.2, die endlos sind, übereinander liegen und zwischen denen die Furniere von einem Kühlereingang zu einem Ausgang förderbar sind. Die Kühlbänder 9.1, 9.2 sind von dem Kühlereingang zu dem Ausgang so geführt, dass ein Obertrum des unteren Kühlbands 9.1 am Kühlereingang und am Ausgang für eine bestimmte Strecke aus dem zweiten Gehäuse 8 waagerecht herausragt. Am Ausgang sind die beiden Kühlbänder 9.1 , 9.2 separat zum Kühlereingang zurückgeführt. Das untere Transportband 6,1 und das untere Kühlband 9.1 sind zwischen dem Trocknerausgang und dem Kühlereingang in einer weitgehend horizontalen Ebene geführt und so nah wie möglich zueinander umgelenkt, um eine Übergabe vom unteren Transportband 6.1 auf das untere Kühlband 9.1 zu vereinfachen. Hierbei ragt das obere Kühlband 9.2 im Bereich zwischen dem Trocknerausgang und dem Kühlereingang so aus dem zweiten Ge- häuse 8 in Richtung der Trockenvorrichtung 1 , dass ein Untertrum des oberen Kühlbands 9.2 weitgehend parallel zu den Obertrumen der unteren Bänder 6.1 , 9.1 und für eine bestimmte Strecke bis über den Obertrum des unteren Transportbands 6.1 verläuft. Das bedeutet, dass das obere Kühlband 9.2 eine Lücke zwischen dem unteren Transportband 6.1 und dem unteren Kühlband 9.1 überbrückt. In einem Bereich über der Lücke ist unmittelbar über dem Untertrum des oberen Kühlbands 9.2 ein Saugkasten 10 angeordnet, der sich in seiner Länge über die Breite des oberen Kühlband 9.2 erstreckt. Die Breite des Saugkastens 10 ist so bemessen, dass er zumindest die Scheitelpunkte der Umlenkungen der unteren Bänder 6.1 , 9.1 überdeckt. Zwischen dem Saugkasten 10 und dem oberen Kühlband 9.2 sind Dichtleisten 11 angeordnet. In dem Saugkasten 10 ist ein Querstromventilator 12 so befestigt, dass er sich über dessen Länge erstreckt. Der Querstromventilator 12 ist mit einem Antrieb gekoppelt.The cooling device 2 is constructed from at least one field 3, which is surrounded by a second housing 8, and a second transport device. This comprises a lower and an upper cooling belt 9.1, 9.2, which are endless, one above the other and between which the veneers are conveyed from a radiator inlet to an outlet. The cooling belts 9.1, 9.2 are guided from the radiator inlet to the outlet so that an upper run of the lower cooling belt 9.1 protrudes horizontally from the second housing 8 at the radiator inlet and at the outlet for a certain distance. At the exit, the two cooling belts 9.1, 9.2 are returned separately to the radiator inlet. The lower conveyor belt 6.1 and the lower cooling belt 9.1 are guided between the dryer outlet and the radiator inlet in a substantially horizontal plane and as close as possible to each other deflected to facilitate a transfer from the lower conveyor belt 6.1 to the lower cooling belt 9.1. In this case, the upper cooling belt 9.2 protrudes in the area between the dryer outlet and the radiator inlet from the second housing 8 in the direction of the drying device 1 so that a lower run of the upper cooling belt 9.2 is largely parallel to the upper runs of the lower belts 6.1, 9.1 and for a specific one Distance to over the upper run of the lower conveyor belt 6.1 runs. This means that the upper cooling belt 9.2 bridges a gap between the lower conveyor belt 6.1 and the lower cooling belt 9.1. In a region above the gap, a suction box 10 is arranged directly above the lower run of the upper cooling belt 9.2, which extends in its length over the width of the upper cooling belt 9.2. The width of the suction box 10 is dimensioned so that it covers at least the vertices of the deflections of the lower bands 6.1, 9.1. Between the suction box 10 and the upper cooling belt 9.2 sealing strips 11 are arranged. In the suction box 10, a cross-flow fan 12 is attached so as to extend over the length thereof. The cross-flow fan 12 is coupled to a drive.
Die Transportbänder 6.1 , 6.2 und die Kühlbänder 9.1 , 9.2 sind z.B. als Siebbänder ausgeführt, vorzugsweise als Weitspiraldraht- Gliederbänder.The conveyor belts 6.1, 6.2 and the cooling belts 9.1, 9.2 are e.g. designed as a screen belts, preferably as wide-spiral wire link belts.
In der Kühlvorrichtung 2 sind Mittel zum Aufblasen von Behandlungsgas angeordnet, um- fassend mindestens einen Ventilator und Kanäle zum Leiten des Behandlungsgases.In the cooling device 2, means for blowing treatment gas are arranged, comprising at least one fan and channels for conducting the treatment gas.
Im Betrieb werden die Furniere 7, die blattförmig mit einer Dicke von z.B. 0,2 bis 4,0 mm von einem Holzblock abgeschnitten sind, am Eingang hintereinander auf den Obertrum des angetriebenen unteren Transportbands 6.1 gegeben. Hierbei liegen die Furniere 7 weitgehend flach auf dem unteren Transportband 6.1. Sobald die Furniere 7 in das Gehäuse 4 eintreten, werden sie von dem angetriebenen oberen Transportband 6.2 bedeckt und infolge dessen Eigengewichts flach auf das untere Transportband 6.1 gedrückt.In operation, the veneers 7, which are sheet-shaped with a thickness of e.g. 0.2 to 4.0 mm are cut from a block of wood, given at the entrance one behind the other on the upper run of the driven lower conveyor belt 6.1. Here, the veneers 7 are largely flat on the lower conveyor belt 6.1. Once the veneers 7 enter the housing 4, they are covered by the driven upper conveyor belt 6.2 and pressed flat due to its own weight on the lower conveyor belt 6.1.
Das Trocknen erfolgt in der Trocknungsvorrichtung 2 wie bekannt. In der Kühlvorrichtung 2 sind die Kühlbänder 9.1, 9.2 angetrieben. Die Geschwindigkeit der Kühlbänder 9.1, 9.2 entspricht mindestens der Geschwindigkeit der Transportbänder 6.1, 6.2. Die Kühlung erfolgt wie bekannt. Am Ausgang werden die Furniere 7 vom unteren Kühlband 9.1 abgenommen und gestapelt. Zwischen der Trockenvorrichtung 1 und der Kühlvorrichtung 2 werden die Furniere 7 von dem unteren Transportband 6.1 auf das untere Kühlband 9.1 überführt. Hierfür werden die Furniere.7 auf dem Obertrum des unteren Transportbands 6.1 gefördert, bis sie in den Wirkungsbereich des von dem angetriebenen Querstromventilator 12 im Saugkasten 10 erzeugten Unterdrucks gelangen. Dieser Unterdruck saugt die Furniere 7 nacheinander ge- gen die Unterseite des oberen Kühlbands 9.2, wobei die Furniere 7 an der Unterseite haftend weiter in Richtung der Kühlvorrichtung 2 gefördert werden. Hierbei sind die Furniere 7 glatt an dem oberen Kühlband 9.2 gehalten, wodurch der Transport besonders sicher ist. Sobald die Furniere 7 den Wirkungsbereich des Unterdrucks verlassen, werden sie wie bekannt zwischen den Kühlbändern 9.1, 9.2 weiter transportiert und behandelt. The drying takes place in the drying apparatus 2 as known. In the cooling device 2, the cooling belts 9.1, 9.2 are driven. The speed of the cooling belts 9.1, 9.2 corresponds at least to the speed of the conveyor belts 6.1, 6.2. The cooling is done as known. At the exit, the veneers 7 are removed from the lower cooling belt 9.1 and stacked. Between the drying device 1 and the cooling device 2, the veneers 7 are transferred from the lower conveyor belt 6.1 to the lower cooling belt 9.1. For this purpose, the Veneiere.7 be promoted on the upper run of the lower conveyor belt 6.1 until they reach the effective range of the negative pressure generated by the driven cross-flow fan 12 in the suction box 10. This negative pressure sucks the veneers 7 one after the other against the underside of the upper cooling belt 9.2, the veneers 7 on the underside being adhesively conveyed further in the direction of the cooling device 2. Here, the veneers 7 are held smoothly on the upper cooling belt 9.2, whereby the transport is particularly safe. As soon as the veneers 7 leave the area of action of the negative pressure, they are, as is known, transported further between the cooling belts 9.1, 9.2 and treated.

Claims

Patentansprüche claims
1. Vorrichtung zum Trocknen von Furnieren mit einer Trockenvorrichtung (1), die eine erste Transportvorrichtung aufweist und mit einer Kühlvorrichtung (2), die der Trockenvorrichtung (1) nachgeordnet ist und eine zweite Transportvorrichtung aufweist, wobei jede der Transportvorrichtungen zwei übereinander liegende Bänder (6.1 , 6.2, 9.1 , 9.2) umfasst, zwischen denen die Furniere von einem Eingang zu einem Ausgang förderbar sind, dadurch gekennzeichnet, dass in einem Bereich zwischen der Trockenvorrichtung (1) und der Kühlvorrichtung (2) ein oberes der Bänder (6.2, 9:2) der einen Transportvorrichtung mit geringem vertikalem Abstand über ein unteres der Bänder (6.1 , 9.1) der anderen Transportvorrichtung geführt ist und dass in dem Bereich unmittelbar über einem Untertrum des oberen Bands (6.2, 9.2) der einen Transportvorrichtung ein nach unten wirkender Saugkasten (10) angeordnet ist.Device for drying veneers with a drying device (1), which has a first transport device and with a cooling device (2), which is arranged downstream of the drying device (1) and has a second transport device, wherein each of the transport devices comprises two superposed belts (1). 6.1, 6.2, 9.1, 9.2), between which the veneers can be conveyed from an entrance to an exit, characterized in that in an area between the drying device (1) and the cooling device (2) an upper one of the belts (6.2, 9 2) of a transport device with a small vertical distance over a lower one of the belts (6.1, 9.1) of the other transport device is guided and that in the area immediately above a lower strand of the upper belt (6.2, 9.2) of a transport device, a downwardly acting suction box (10) is arranged.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass ein oberes Kühlband (9.2) über ein unteres Transportband (6.1) geführt ist.2. Apparatus according to claim 1, characterized in that an upper cooling belt (9.2) via a lower conveyor belt (6.1) is guided.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Saugkasten (10) an mindestens einen Querstromventilator (12) angeschlossen ist. 3. Apparatus according to claim 1 or 2, characterized in that the suction box (10) is connected to at least one cross-flow fan (12).
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass sich der mindestens eine Querstromventilator (12) im wesentlichen über die gesamte Länge des Saugkastens (10) erstreckt. 4. Apparatus according to claim 3, characterized in that extending the at least one cross-flow fan (12) substantially over the entire length of the suction box (10).
PCT/EP2006/002105 2005-04-26 2006-03-08 Veneer dryer WO2006114153A1 (en)

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DE102005019643.8 2005-04-26
DE200510019643 DE102005019643A1 (en) 2005-04-26 2005-04-26 Veneer dryer has topmost belt of first transport device guided at small distance above lowest belt of second transport device, suction box with downward effect in this area directly above lower strand of first transport device's upper belt

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ES2408454R1 (en) * 2011-12-16 2013-08-29 Ingenieria Plana Alta S A L LINE EXTENSION FOR CERAMIC PARTS MANAGEMENT
CN109140976A (en) * 2018-10-15 2019-01-04 福建佶龙机械科技股份有限公司 The multilayer drying machine of sectional temperature adjustment

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US3490764A (en) * 1966-07-16 1970-01-20 Carl K B Mueller Process and device for depositing leaf or sheet material,especially veneer sheets
DE2231132A1 (en) * 1972-06-26 1974-01-17 Buettner Schilde Haas Ag STACKING DEVICE FOR VENEERS
FR2290282A1 (en) * 1974-11-06 1976-06-04 Cremona Angelo Veneer sheet drier automatic loading machine - has perforated belts running below vacuum chambers to transport sheets
DE2808428A1 (en) * 1978-02-27 1979-08-30 Keller Gmbh & Co Kg Two stage veneer strip continuous dryer - has suction box inside first upper belt conveyor at junction between lower belts
DE3343811A1 (en) * 1983-12-03 1985-06-13 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Suction belt conveyor
DE8529852U1 (en) * 1985-10-22 1985-12-05 H. Krantz Gmbh & Co, 5100 Aachen Device for the continuous filtering of a gas
EP0192207A2 (en) * 1985-02-19 1986-08-27 BABCOCK-BSH AKTIENGESELLSCHAFT vormals Büttner-Schilde-Haas AG Veneer dryer
US6581300B1 (en) * 1999-03-11 2003-06-24 Babcock-Bsh Gmbh Method for drying veneer and corresponding drying device

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DE29511405U1 (en) * 1995-07-14 1996-11-14 Babcock Bsh Ag Dryer for continuous veneer sheets

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490764A (en) * 1966-07-16 1970-01-20 Carl K B Mueller Process and device for depositing leaf or sheet material,especially veneer sheets
DE2231132A1 (en) * 1972-06-26 1974-01-17 Buettner Schilde Haas Ag STACKING DEVICE FOR VENEERS
FR2290282A1 (en) * 1974-11-06 1976-06-04 Cremona Angelo Veneer sheet drier automatic loading machine - has perforated belts running below vacuum chambers to transport sheets
DE2808428A1 (en) * 1978-02-27 1979-08-30 Keller Gmbh & Co Kg Two stage veneer strip continuous dryer - has suction box inside first upper belt conveyor at junction between lower belts
DE3343811A1 (en) * 1983-12-03 1985-06-13 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Suction belt conveyor
EP0192207A2 (en) * 1985-02-19 1986-08-27 BABCOCK-BSH AKTIENGESELLSCHAFT vormals Büttner-Schilde-Haas AG Veneer dryer
DE8529852U1 (en) * 1985-10-22 1985-12-05 H. Krantz Gmbh & Co, 5100 Aachen Device for the continuous filtering of a gas
US6581300B1 (en) * 1999-03-11 2003-06-24 Babcock-Bsh Gmbh Method for drying veneer and corresponding drying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2408454R1 (en) * 2011-12-16 2013-08-29 Ingenieria Plana Alta S A L LINE EXTENSION FOR CERAMIC PARTS MANAGEMENT
CN109140976A (en) * 2018-10-15 2019-01-04 福建佶龙机械科技股份有限公司 The multilayer drying machine of sectional temperature adjustment

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