EP0630725A1 - Device for the continuous production of particle boards, fibre boards or the like - Google Patents

Device for the continuous production of particle boards, fibre boards or the like Download PDF

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Publication number
EP0630725A1
EP0630725A1 EP93202303A EP93202303A EP0630725A1 EP 0630725 A1 EP0630725 A1 EP 0630725A1 EP 93202303 A EP93202303 A EP 93202303A EP 93202303 A EP93202303 A EP 93202303A EP 0630725 A1 EP0630725 A1 EP 0630725A1
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EP
European Patent Office
Prior art keywords
press
pressing
pressure
drum
belt
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.)
Granted
Application number
EP93202303A
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German (de)
French (fr)
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EP0630725B1 (en
Inventor
Rolf Lehmann
Eugen Schnyder
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De Pretto Escher Wyss SRL
Original Assignee
Sulzer Escher Wyss AG
Escher Wyss AG
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Publication of EP0630725A1 publication Critical patent/EP0630725A1/en
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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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/26—Moulding or pressing characterised by using continuously acting presses having a heated press drum and an endless belt to compress the material between belt and drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]

Definitions

  • the invention relates to a device for the continuous production of chipboard, fiberboard or the like. From a machined or defibrated, mixed with a pressure and / or thermosetting binder, lignocellulosic or cellulose-containing starting material with a heatable press drum and an endless metallic press belt guided over deflection rollers , which encloses the press drum on part of its circumference, forming a press section for the material to be compacted, which is heated above the curing temperature of the binder, the press belt being areal with a certain press pressure pressing device is provided, according to the earlier patent application No. 93810458.5.
  • Such arrangements are known for example from EP 195 128, EP 324 070, DE 25 49 560 or DE 38 00 513. They serve to process waste material in large quantities, such as wood waste, sugar cane bagasse, cotton stalk or the like, into chipboard or fiberboard or the like for use in the construction or furniture industry.
  • the lignocellulose- or cellulose-containing starting material is machined or dissolved in fibers and mixed with a suitable binder in a cleaned and largely dried form.
  • a suitable binder for example, copolymers of sodium lignosulphonate, melamine and formaldehyde, which gradually harden at a temperature of about 130 ° C., have proven to be particularly suitable for binding cellulose fibers and for forming solid chipboard (medium density fiber board).
  • the starting material mixed with the binder is introduced on the belt into the pressing section between the belt and the press drum rotating synchronously with it, where it is compressed under the action of pressure and temperature and gradually hardens before it is removed from the press drum and is cut into the desired plate size.
  • a press roller is provided on the input side, ie at the inlet of the starting material into the press zone, which has an almost line-like arrangement Press force with a pressing pressure of well over 100 bar on the belt. Adjoining this press roll on the input side is a zone in which the press pressure is generated only by the belt tension, and then another press roll with an almost linear force. As a rule, three to four rollers are provided here, the last roller serving to shape the plates produced shortly before the end of the setting process.
  • a disadvantage of these previously known methods is that, due to the sudden pressure loading and subsequent zones of low pressure, due to the multiple resilience of the fibers, insufficient strength, an undesirable density profile and an unfavorable distribution of hardness over the thickness of the plate result, and the amount of binder must be chosen to be unnecessarily large.
  • a particular disadvantage is that considerable forces can occur on the press drum bearings in the known devices. This requires the arrangement of the individual press rolls in such a way that the bearing forces of the press drum are at least partially compensated, the balance of forces being disturbed by adaptation to other operating conditions. Continue is disadvantageous that the press rollers deform the press drum so much that it is not possible to maintain close tolerances. In order to keep the deflection of the press drum as small as possible with the large forces, a considerable wall thickness of the press drum in the decimeter range is required, which means that the press drum weighs over 100 t. Nevertheless, the deflection of the press drum is still so great that the thickness of the chipboard produced varies inadmissibly across the width and its shape is curved, ie deviates from one plane.
  • the invention sets itself the task of avoiding the above-mentioned disadvantages of the prior art and in particular developing an arrangement for the continuous production of chipboard, fiberboard or the like.
  • a uniform thickness across the width of the chipboard produced or Fiberboard or a desired thickness profile can be achieved, as well as a flat shape, and to achieve greater strength and a more homogeneous density and hardness distribution over the thickness of the chipboard or fiberboard, the material in the press section in a simple manner on the curing temperature of Binder is heated, and extreme bearing forces are avoided.
  • the press drum has a non-rotatable carrier and a jacket which is rotatable relative to the latter and supported with at least one supporting device with adjustable supporting force, so that on the one hand the Deflection of the jacket is avoided and, on the other hand, the bearing forces on the drum journal are significantly reduced or are eliminated.
  • the support devices are advantageously designed as hydraulic support elements, in particular those that follow and are supplied with heated pressure medium, with individually adjustable support forces.
  • the pressing device is advantageously formed at least on the entry side into the pressing section by a pressure shoe with a hydraulic bearing surface, which with the pressing drum has a gradually narrowing inlet zone and a subsequent pressing section area which extends over a certain extent of the pressing drum with approximately uniform pressing pressure and / or forms a distance from the press drum, which further improves the uniformity of the chipboard.
  • the system has a press drum 1, as well as an endless metallic press belt 2, for example a steel belt, which is guided continuously over part of the circumference of the press drum 1 and over several deflecting rollers 3, so that there is a press section over the belt part of the press drum 1 P forms.
  • the press drum 1 and the press belt 2 move synchronously with one another in the press section P.
  • Machined or fiberized lignocellulose or cellulose-containing material 5 mixed with a thermosetting binder is poured out of a chute 4 by means of a conveyor belt 29 guided over deflection rollers 30 via a guide surface 28 onto the upper side of the press belt 2 running horizontally here with a certain intended basis weight and runs up the press belt 2 into the entry zone E of the press section P.
  • the material introduced is subjected to a press pressure and at the same time heated above the curing temperature of the binder.
  • the material is compressed to the desired density and almost cured during the passage time.
  • the plate formed is subjected to a final pressing by means of a forming roller 6 subjected and receives the desired thickness profile or the required surface quality or structure.
  • the still endless chipboard or fiberboard 7 emerging from the outlet zone A is cut to the desired format in a cutting device 8 and deposited on a stack 9.
  • the press drum 1 is provided with a drum jacket 20 which is rotatable about a carrier 19 which is clamped in a rotationally fixed manner and which is supported against the carrier 19 by at least one support device 21. Since there are no journal bearings and the forces are derived via the clamping of the carrier 19, the problem of compensating the bearing forces in this arrangement is completely eliminated.
  • the support devices 21 can be designed in a known manner as trailing hydrostatic support elements supplied with pressure controllable pressure via lines 22, which exert an adjustable support force on the casing 20 and ensure an almost friction-free mounting of the rotating drum casing 20, or as other known support elements or also as rolling elements.
  • the support elements 21 can be designed as a continuous support strip or as individually controllable support elements arranged next to one another in the axial direction.
  • a plurality of support strips or rows of support elements 21 can also be provided next to one another in the circumferential direction.
  • the sides of the press drum 1 are advantageously closed by flexible, for example bellows-type seals. Instead, however, the entire half space between the carrier 19 and the drum jacket 10 or 10 facing the pressing section P can also be used as a supporting device a partial space can be filled with pressurized fluid.
  • the pressure medium of the support elements 21 is advantageously heated to such a temperature that the drum jacket is heated above the curing temperature of the binder and thus a sufficiently intensive heating of the material 5 in the press section P is ensured.
  • the wall thickness of the jacket 20 of the press drum 1 can be significantly reduced, for example to the order of 5 cm, and the weight of the press drum from significantly more than 100 t to less than 50 t.
  • the reduction in wall thickness also improves heat transport and reduces energy consumption.
  • the targeted adjustment of the pressing pressure of the pressure shoes 10, 13, 14, 15 and the support elements 21 can prevent the drum jacket 20 from bending under the enormous pressing forces, so that the constancy of thickness of the chipboard 7 is significantly improved and the wear of the pressing belt 2 is reduced becomes.
  • a pressure shoe 10 is provided at the entrance E into the press path P for forming the press path P between the press drum 1 and the press belt 2, for exerting the required press pressure and for heating the press belt 2 and the material layer 5 transported thereon. Its surface facing the press belt 2 is shaped in such a way that a gradually narrowing funnel-shaped gap is formed between the press belt 2 and the press drum 1 at the entrance E into the press zone P, while an almost uniform distance between the press belt 2 and the press drum 1 is formed in the subsequent press section P. is. This arises at the entrance E is an initially increasing pressing pressure, which is kept in the subsequent pressing zone P almost at a certain predetermined pressure value during the entire cycle time via the pressure shoe 10.
  • the surface of the pressure shoe 10 facing the press belt 2 is advantageously provided with one or more hydrostatic bearing pockets 11 which are fed via pressure lines 12 with a lubricant under a certain pressure, for example a sufficiently temperature-resistant pressure oil.
  • a lubricant under a certain pressure, for example a sufficiently temperature-resistant pressure oil.
  • the pressure required in the press section P can be set at the same time via the pressure set in the storage pockets 11. It is also an advantage that supplied pressure oil to a temperature above the curing temperature of the binder, for example, to about 150 o C to heat, so that thus also the press belt 2 is held while sliding over the bearing pockets 11 and the transported material out 5 above the curing temperature.
  • a preliminary heating of the press belt 2 takes place in that the front side 25 of the pressure shoe 10 has a preheating zone C, over which the belt 2 slides in front of the inlet zone E, where this is also provided with hydrostatic bearing pockets 26 fed with lines of hot pressure oil via lines 27.
  • a single sufficiently long pressure shoe 10 is often sufficient.
  • further pressure shoes 13, 14 and 15 of similar construction can be provided downstream of the input-side pressure shoe 10 in the pressing section P, which pressure shoes connect practically without interruption.
  • the bearing pockets of these downstream pressure shoes 13, 14 and 15 can be supplied with pressure oil of different pressure, so that a gradually decreasing pressure can be formed, for example with the pressure shoe 10 on the inlet side a pressure of 30-50 bar, which in the case of the downstream pressure shoes gradually increases to 2 - decreases 3 bar.
  • the pressure shoes 10, as well as 13, 14, 15 can be arranged in a fixed position with respect to the press drum 1 at a predetermined distance, or can be adjusted by means of adjusting devices 23 against the press drum 1 for the purpose of adjusting the gap in the press path P in the press direction, e.g. manually using spindles or automatically using electrical, magnetic, pneumatic or hydraulic controls. In the latter case, they can be movable on hydraulic pressure spaces supplied with pressure-adjustable pressure, wherein the same pressure medium can also be used as for supplying the storage pockets 11.
  • a shaping roller 6 can be provided, which gives the already largely hardened chipboard 7 the desired shape and conditions, for example the desired thickness profile, by exerting a higher pressing pressure than that of the last pressure shoe 15.
  • This shaping roller is advantageously equipped with a jacket 17 which can be rotated about a carrier 16 which is clamped in a rotationally fixed manner and which is supported against the carrier 16 with one or more supporting elements 18 with adjustable supporting force in the pressing direction.
  • the support element 18 can be a continuous support strip or a plurality of support elements can be provided next to one another in the axial direction, with which a specific thickness profile can be produced.
  • the support elements 18 can be designed in a manner known per se as trailing hydrostatic support elements with individually controllable pressing force or in another known manner, or the entire press-side half-space h is designed as a pressure chamber closed by sealing strips 24.
  • the shaping roller 6 can be adjustable in the drum circumferential direction in order to vary the curing distance.
  • the last pressure shoe can also serve as a shaped element, provided that it exerts a sufficient pressing pressure for shaping, without a shaping roller.

Abstract

An installation for the production of particle boards or fibre boards has a pressing drum (1) and an endless steel belt (2) which encloses the drum (1) on a part of its circumference and thereat forms a pressing zone (P) in which introduced, chipped or fibrised, lignocellulose or cellulose material provided with thermo-hardening binder is compressed and set over a sufficiently long time by the action of pressure and temperature. The pressing pressure and the heating-up are produced by extended pressure shoes (10, 13, 14, 15) with a hydrostatic bearing pocket (11) supplied with hot pressure oil, the pressing drum (1) being equipped with a rotationally fixed carrier (19) and a shell (20) rotatable about the latter and supported by means of supporting elements (21) supplied with hot pressure oil, so that simultaneously the shell (20) is heated up and adjustable pressing forces are produced without bearing loading, with a uniform even gap. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zur kontinuierlichen Herstellung von Spanplatten, Faserplatten oder dgl. aus einem zerspanten oder zerfaserten, mit einem druck- und/oder thermohärtenden Bindemittel vermischten, lignocellulose- oder cellulosehaltigen Ausgangsmaterial mit einer beheizbaren Presstrommel und einem endlosen, über Umlenkwalzen geführten metallischen Pressband, welches die Presstrommel auf einem Teil ihres Umfanges unter Bildung einer Pressstrecke für das zu verdichtende, über die Aushärtetemperatur des Bindemittels erwärmte Material umschliesst, wobei eine das Pressband flächenmässig mit einem bestimmten Press-Druck beaufschlagende Anpresseinrichtung vorgesehen ist, gemäss der früheren Patentanmeldung No. 93810458.5.The invention relates to a device for the continuous production of chipboard, fiberboard or the like. From a machined or defibrated, mixed with a pressure and / or thermosetting binder, lignocellulosic or cellulose-containing starting material with a heatable press drum and an endless metallic press belt guided over deflection rollers , which encloses the press drum on part of its circumference, forming a press section for the material to be compacted, which is heated above the curing temperature of the binder, the press belt being areal with a certain press pressure pressing device is provided, according to the earlier patent application No. 93810458.5.

Solche Anordnungen sind beispielsweise aus EP 195 128, EP 324 070, DE 25 49 560 oder DE 38 00 513 bekannt. Sie dienen dazu, in grossen Mengen anfallendes Abfallmaterial, wie Holzabfälle, Zuckerrohr-Bagasse, Baumwollstengel oder dgl. zu Spanplatten oder Faserplatten oder dgl. zur Verwendung in der Bau- oder Möbelindustrie zu verarbeiten. Dazu wird das lignocellulose- oder cellulosehaltige Ausgangsmaterial zerspant oder in Fasern aufgelöst und in gereinigter und weitgehend getrockneter Form mit einem geeigneten Bindemittel versetzt. Als besonders geeignet zur Bindung von Cellulosefasern und zur Bildung fester Spanplatten (Medium Density Fibre-Board) haben sich beispielsweise Copolymere von Natriumlignosulphonat, Melamin und Formaldehyd erwiesen, welche bei einer Temperatur von etwa 130⁰C allmählich aushärten.Such arrangements are known for example from EP 195 128, EP 324 070, DE 25 49 560 or DE 38 00 513. They serve to process waste material in large quantities, such as wood waste, sugar cane bagasse, cotton stalk or the like, into chipboard or fiberboard or the like for use in the construction or furniture industry. For this purpose, the lignocellulose- or cellulose-containing starting material is machined or dissolved in fibers and mixed with a suitable binder in a cleaned and largely dried form. For example, copolymers of sodium lignosulphonate, melamine and formaldehyde, which gradually harden at a temperature of about 130 ° C., have proven to be particularly suitable for binding cellulose fibers and for forming solid chipboard (medium density fiber board).

Zur Bildung der Spanplatten oder Faserplatten wird das mit Bindemittel vermischte Ausgangsmaterial auf dem Band in die Pressstrecke zwischen dem Band und der synchron mit diesem umlaufenden Presstrommel eingebracht, wo sie unter Druck- und Temperatureinwirkung verdichtet wird und allmählich aushärtet, bevor sie von der Presstrommel abgenommen und in die gewünschte Plattengrösse zerschnitten wird.To form the chipboard or fiberboard, the starting material mixed with the binder is introduced on the belt into the pressing section between the belt and the press drum rotating synchronously with it, where it is compressed under the action of pressure and temperature and gradually hardens before it is removed from the press drum and is cut into the desired plate size.

Bei den bekannten Anordnungen ist eingangsseitig, d.h. am Einlauf des Ausgangsmaterials in die Presszone eine Presswalze vorgesehen, welche eine nahezu linienartige Presskraft mit einem Pressdruck von erheblich über 100 bar auf das Band ausübt. Anschliessend an diese eingangsseitige Presswalze folgt eine Zone, in welcher der Pressdruck lediglich durch die Bandspannung erzeugt wird, und anschliessend eine weitere Presswalze mit ebenfalls nahezu linienförmiger Kraftausübung. In der Regel sind hierbei drei bis vier Walzen vorgesehen, wobei die letzte Walze der Formgebung der hergestellten Platten kurz vor dem Ende des Abbindevorganges dient. Nachteilig an diesen vorbekannten Verfahren ist, dass infolge der schlagartigen Druckbeanspruchung und nachfolgenden Zonen geringen Druckes wegen des Mehrfach-Zurückfederns der Fasern eine ungenügende Festigkeit, ein unerwünschtes Dichteprofil und eine ungünstige Härteverteilung über die Dicke der Platte resultiert sowie die Bindemittelmenge unnötig gross gewählt werden muss.In the known arrangements, a press roller is provided on the input side, ie at the inlet of the starting material into the press zone, which has an almost line-like arrangement Press force with a pressing pressure of well over 100 bar on the belt. Adjoining this press roll on the input side is a zone in which the press pressure is generated only by the belt tension, and then another press roll with an almost linear force. As a rule, three to four rollers are provided here, the last roller serving to shape the plates produced shortly before the end of the setting process. A disadvantage of these previously known methods is that, due to the sudden pressure loading and subsequent zones of low pressure, due to the multiple resilience of the fibers, insufficient strength, an undesirable density profile and an unfavorable distribution of hardness over the thickness of the plate result, and the amount of binder must be chosen to be unnecessarily large.

Ein weiterer Nachteil ist, dass bei den bekannten Einrichtungen die Presstrommel und die Anpresswalzen nicht hinreichend beheizbar sind um genügend Wärme an das Material zu übertragen, mit der Folge, dass das Band mit zusätzlichen Heizvorrichtungen auf die erforderliche Temperatur gebracht werden muss.Another disadvantage is that in the known devices, the press drum and the pressure rollers cannot be heated sufficiently to transfer sufficient heat to the material, with the result that the belt must be brought to the required temperature with additional heating devices.

Speziell ist nachteilig, dass bei den bekannten Einrichtungen erhebliche Kräfte an den Presstrommel-Lagern auftreten können. Dies erfordert die Anordnung der einzelnen Presswalzen derart, dass die Lagerkräfte der Presstrommel zumindest zum Teil kompensiert werden, wobei durch eine Anpassung an andere Betriebsbedingungen das Kräftegleichgewicht gestört würde. Weiter ist nachteilig, dass die Presswalzen die Presstrommel so stark verformen, dass keine Einhaltung enger Toleranzen möglich ist. Um bei den grossen Kräften die Durchbiegung der Presstrommel möglichst klein zu halten, ist eine erhebliche Wandstärke der Presstrommel im Dezimeter-Bereich erforderlich, was ein Gewicht der Presstrommel über 100 t mit sich bringt. Trotzdem ist auch hierbei die Durchbiegung der Presstrommel noch so gross, dass die Dicke der erzeugten Spanplatten über die Breite unzulässig variiert und deren Form gebogen ist, d.h. von einer Ebene abweicht.A particular disadvantage is that considerable forces can occur on the press drum bearings in the known devices. This requires the arrangement of the individual press rolls in such a way that the bearing forces of the press drum are at least partially compensated, the balance of forces being disturbed by adaptation to other operating conditions. Continue is disadvantageous that the press rollers deform the press drum so much that it is not possible to maintain close tolerances. In order to keep the deflection of the press drum as small as possible with the large forces, a considerable wall thickness of the press drum in the decimeter range is required, which means that the press drum weighs over 100 t. Nevertheless, the deflection of the press drum is still so great that the thickness of the chipboard produced varies inadmissibly across the width and its shape is curved, ie deviates from one plane.

Die Erfindung setzt sich die Aufgabe, die vorstehend angeführten Nachteile des Standes der Technik zu vermeiden und insbesondere eine Anordnung zur kontinuierlichen Herstellung von Spanplatten, Faserplatten oder dgl. der eingangs genannten Art derart weiterzubilden, dass damit eine gleichmässigere Dicke über die Breite der erzeugten Spanplatte oder Faserplatte bzw.ein gewünschtes Dickenprofil erzielt werden kann, sowie eine ebene Form, und um eine grössere Festigkeit und eine homogenere Dichte- und Härteverteilung über die Dicke der Spanplatte oder Faserplatte zu erreichen, wobei das Material in der Pressstrecke auf einfache Weise über die Aushärtetemperatur des Bindemittels erhitzt wird, und wobei extreme Lagerkräfte vermieden werden.The invention sets itself the task of avoiding the above-mentioned disadvantages of the prior art and in particular developing an arrangement for the continuous production of chipboard, fiberboard or the like. Such that such a uniform thickness across the width of the chipboard produced or Fiberboard or a desired thickness profile can be achieved, as well as a flat shape, and to achieve greater strength and a more homogeneous density and hardness distribution over the thickness of the chipboard or fiberboard, the material in the press section in a simple manner on the curing temperature of Binder is heated, and extreme bearing forces are avoided.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass die Presstrommel einen einen drehfesten Träger und einen gegenüber diesem rotierbaren mit wenigstens einer Stützvorrichtung mit einstellbarer Stützkraft abgestützten Mantel aufweist, so dass einerseits die Durchbiegung des Mantels vermieden wird und andererseits die Lagerkräfte an den Trommelzapfen wesentlich reduziert sind oder entfallen.According to the invention, this object is achieved in that the press drum has a non-rotatable carrier and a jacket which is rotatable relative to the latter and supported with at least one supporting device with adjustable supporting force, so that on the one hand the Deflection of the jacket is avoided and, on the other hand, the bearing forces on the drum journal are significantly reduced or are eliminated.

Die Stützvorrchtungen sind mit Vorteil als hydraulische insbesondere nachfahrende und mit beheiztem Druckmittel versorgte Stützelemente mit individuell einstellbarer Stützkraft ausgebildet.The support devices are advantageously designed as hydraulic support elements, in particular those that follow and are supplied with heated pressure medium, with individually adjustable support forces.

Mit Vorteil wird die Presseinrichtung zumindest an der Eingangsseite in die Pressstrecke durch einen Druckschuh mit hydraulischer Lagerfläche gebildet, welcher mit der Presstrommel eine sich allmählich verengende Einlaufzone und eine anschliessende, sich über einen gewissen Umfang der Presstrommel erstreckenden Pressstrecken-Bereich mit angenähert gleichförmigem Pressdruck und/oder Abstand von der Presstrommel bildet, wodurch die Gleichförmigkeit der Spanplatten weiter verbessert wird..The pressing device is advantageously formed at least on the entry side into the pressing section by a pressure shoe with a hydraulic bearing surface, which with the pressing drum has a gradually narrowing inlet zone and a subsequent pressing section area which extends over a certain extent of the pressing drum with approximately uniform pressing pressure and / or forms a distance from the press drum, which further improves the uniformity of the chipboard.

Bei einer vorteilhaften Weiterbildung der Erfindung sind unmittelbar an den eingangsseitigen Druckschuh weitere hydraulische Druckschuhe vorgesehen, welche einen sukzessive stufenweise abnehmenden Druck auf das Pressband ausüben. Anschliessend daran kann an der Austrittsseite der Platten eine Formgebungswalze mit über die Breite steuerbarer Linienkraft vorgesehen sein, um kurz vor Ende des Aushärtungsvorganges das gewünschte Dickenprofil oder eine vorgesehene Oberflächenform zu erreichen.In an advantageous development of the invention, further hydraulic pressure shoes are provided directly on the pressure shoe on the input side, which pressure shoes gradually exert a gradually decreasing pressure on the press belt. Subsequently, a shaping roller with line force that can be controlled over the width can be provided on the exit side of the plates, in order to achieve the desired thickness profile or an intended surface shape shortly before the end of the curing process.

Die Erfindung wird anhand des in der beiliegenden Figur dargestellten Ausführungsbeispieles einer Anlage zur Herstellung von Spanplatten, Faserplatten oder dgl. näher beschrieben.The invention is described in more detail with reference to the embodiment of a plant for the production of chipboard, fiberboard or the like shown in the accompanying figure.

Die Anlage weist eine Presstrommel 1 auf, sowie ein endloses metallisches Pressband 2, beispielsweise ein Stahlband, welches über einen Teil des Umfanges der Presstrommel 1 und über mehrere Umlenkwalzen 3 kontinuierlich geführt ist, so dass es über den Umschlingungsteil der Presstrommel 1 mit dieser eine Pressstrecke P bildet. Die Presstrommel 1 und das Pressband 2 bewegen sich in der Pressstrecke P synchron miteinander.The system has a press drum 1, as well as an endless metallic press belt 2, for example a steel belt, which is guided continuously over part of the circumference of the press drum 1 and over several deflecting rollers 3, so that there is a press section over the belt part of the press drum 1 P forms. The press drum 1 and the press belt 2 move synchronously with one another in the press section P.

Aus einem Schüttkasten 4 wird zerspantes oder zerfasertes lignocellulose- oder cellulosehaltiges, mit einem thermohärtenden Bindemittel vermischtes Material 5 vermittels eines über Umlenkrollen 30 geführten Förderbandes 29 über eine Führungsfläche 28 auf die Oberseite des hier horizontal verlaufenden Pressbandes 2 mit einem bestimmten vorgesehenen Flächengewicht aufgeschüttet und läuft auf dem Pressband 2 in die Eingangszone E der Pressstrecke P. In der Pressstrecke P wird das eingebrachte Material einem Pressdruck ausgesetzt und gleichzeitig über die Aushärtungstemperatur des Bindemittels erhitzt. Während des Durchlaufs durch die Pressstrecke P wird das Material auf die gewünschte Dichte komprimiert und während der Durchlaufzeit nahezu ausgehärtet. Am Ende F der Pressstrecke P kurz vor dem Auslauf A wird die gebildete Platte mittels einer Formwalze 6 einer Schlusspressung unterworfen und erhält das gewünschte Dickenprofil bzw. die erforderliche Oberflächengüte bzw. Struktur. Die aus der Auslaufzone A austretende, noch endlose Spanplatte bzw. Faserplatte 7 wird in einer Schneidevorrichtung 8 auf das gewünschte Format zurechtgeschnitten und auf einem Stapel 9 deponiert.Machined or fiberized lignocellulose or cellulose-containing material 5 mixed with a thermosetting binder is poured out of a chute 4 by means of a conveyor belt 29 guided over deflection rollers 30 via a guide surface 28 onto the upper side of the press belt 2 running horizontally here with a certain intended basis weight and runs up the press belt 2 into the entry zone E of the press section P. In the press section P, the material introduced is subjected to a press pressure and at the same time heated above the curing temperature of the binder. During the passage through the press section P, the material is compressed to the desired density and almost cured during the passage time. At the end F of the pressing section P shortly before the outlet A, the plate formed is subjected to a final pressing by means of a forming roller 6 subjected and receives the desired thickness profile or the required surface quality or structure. The still endless chipboard or fiberboard 7 emerging from the outlet zone A is cut to the desired format in a cutting device 8 and deposited on a stack 9.

Die Presstrommel 1 ist mit einem um einen drehfest eingespannten Träger 19 rotierbaren Trommelmantel 20 versehen, welcher mit wenigstens einer Stützvorrichtung 21 gegen den Träger 19 abgestützt ist. Da keine Zapfenlager vorhanden sind und die Kräfte über die Einspannung des Trägers 19 abgeleitet werden, entfällt das Problem der Kompensation der Lagerkräfte bei dieser Anordnung vollständig. Die Stützvorrichtungen 21 können in bekannter Weise als nachfahrende hydrostatische, über Leitungen 22 mit Druckmittel steuerbaren Druckes versorgte Stützelemente ausgebildet sein, welche eine einstellbare Stützkraft auf den Mantel 20 ausüben und eine nahezu reibungsfreie Lagerung des rotierenden Trommelmantels 20 gewährleisten, oder als andere bekannte Stützelemente bzw. auch als Wälzkörper. Die Stützelemente 21 können als durchgehende Stützleiste oder als in Achsenrichtung nebeneinander angeordnete, individuell ansteuerbare Stützelemente ausgebildet sein. Auch in Umfangsrichtung können nebeneinander mehrere Stützleisten oder Reihen von Stützelementen 21 vorgesehen sein. Die Seiten der Presstrommel 1 sind mit Vorteil durch flexible z.B. balgartige Dichtungen abgeschlossen. Stattdessen kann als Stützvorrichtung jedoch auch der gesamte der Pressstrecke P zugekehrte Halbraum zwischen Träger 19 und Trommelmantel 10 oder ein Teilraum mit Druckfluid gefüllt sein. Das Druckmittel der Stützelemente 21 ist mit Vorteil auf eine solche Temperatur geheizt, so dass der Trommelmantel über die Aushärtungstemperatur des Bindemittels erhitzt wird und somit eine genügend intensive Erhitzung des Materials 5 in der Pressstrecke P gewährleistet ist. Zudem kann bei dieser Ausführung die Wandstärke des Mantels 20 der Presstrommel 1 wesentlich reduziert werden, z.B. in die Grössenordnung von 5 cm, und das Gewicht der Presstrommel von deutlich mehr als 100 t auf weniger als 50 t. Zudem wird durch die Reduktion der Wandstärke der Wärmetransport verbessert und der Energiebedarf vermindert. Durch die gezielte Einstellung des Pressdruckes der Druckschuhe 10, 13, 14, 15 und der Stützelemente 21 kann vermieden werden, dass sich der Trommelmantel 20 unter den enormen Presskräften durchbiegt, so dass die Dickenkonstanz der Spanplatte 7 wesentlich verbessert und der Verschleiss des Pressbandes 2 vermindert wird.The press drum 1 is provided with a drum jacket 20 which is rotatable about a carrier 19 which is clamped in a rotationally fixed manner and which is supported against the carrier 19 by at least one support device 21. Since there are no journal bearings and the forces are derived via the clamping of the carrier 19, the problem of compensating the bearing forces in this arrangement is completely eliminated. The support devices 21 can be designed in a known manner as trailing hydrostatic support elements supplied with pressure controllable pressure via lines 22, which exert an adjustable support force on the casing 20 and ensure an almost friction-free mounting of the rotating drum casing 20, or as other known support elements or also as rolling elements. The support elements 21 can be designed as a continuous support strip or as individually controllable support elements arranged next to one another in the axial direction. A plurality of support strips or rows of support elements 21 can also be provided next to one another in the circumferential direction. The sides of the press drum 1 are advantageously closed by flexible, for example bellows-type seals. Instead, however, the entire half space between the carrier 19 and the drum jacket 10 or 10 facing the pressing section P can also be used as a supporting device a partial space can be filled with pressurized fluid. The pressure medium of the support elements 21 is advantageously heated to such a temperature that the drum jacket is heated above the curing temperature of the binder and thus a sufficiently intensive heating of the material 5 in the press section P is ensured. In addition, in this embodiment, the wall thickness of the jacket 20 of the press drum 1 can be significantly reduced, for example to the order of 5 cm, and the weight of the press drum from significantly more than 100 t to less than 50 t. The reduction in wall thickness also improves heat transport and reduces energy consumption. The targeted adjustment of the pressing pressure of the pressure shoes 10, 13, 14, 15 and the support elements 21 can prevent the drum jacket 20 from bending under the enormous pressing forces, so that the constancy of thickness of the chipboard 7 is significantly improved and the wear of the pressing belt 2 is reduced becomes.

Zur Bildung der Pressstrecke P zwischen Presstrommel 1 und Pressband 2, sowie zur Ausübung des erforderlichen Pressdruckes sowie zur Aufheizung des Pressbandes 2 und der darauf transportierten Materialschicht 5 ist am Eingang E in die Pressstrecke P ein Druckschuh 10 vorgesehen. Dessen dem Pressband 2 zugekehrte Oberfläche ist so geformt, dass am Eingang E in die Presszone P ein sich allmählich verengender trichterförmiger Spalt zwischen Pressband 2 und Presstrommel 1 gebildet ist, während in der anschliessenden Pressstrecke P ein nahezu gleichförmiger Abstand zwischen Pressband 2 und Presstrommel 1 gebildet ist. Dabei entsteht am Eingang E ein zunächst ansteigender Pressdruck, welcher in der anschliessenden Presszone P nahezu auf einem bestimmten vorgegebenen Druckwert während der gesamten Durchlaufzeit über den Druckschuh 10 gehalten wird.A pressure shoe 10 is provided at the entrance E into the press path P for forming the press path P between the press drum 1 and the press belt 2, for exerting the required press pressure and for heating the press belt 2 and the material layer 5 transported thereon. Its surface facing the press belt 2 is shaped in such a way that a gradually narrowing funnel-shaped gap is formed between the press belt 2 and the press drum 1 at the entrance E into the press zone P, while an almost uniform distance between the press belt 2 and the press drum 1 is formed in the subsequent press section P. is. This arises at the entrance E is an initially increasing pressing pressure, which is kept in the subsequent pressing zone P almost at a certain predetermined pressure value during the entire cycle time via the pressure shoe 10.

Im Vergleich zu Anordnungen mit einer eingangsseitigen Presswalze, welche die Presstrommel 1 im wesentlichen nahezu linienförmig berührt und somit nur eine kurzzeitige Druckspitze am Eingang in den Pressspalt erzeugt, nach welchem der Druck wieder auf einen tiefen Wert abfällt und eine Rückfederung der Fasern ermöglicht, wird bei der beschriebenen Anordnung der Druck in der Pressstrecke P über eine wesentlich längere Zeit ohne unerwünschte Druckspitzen und Unterbrüche aufrechterhalten, mit der Folge, dass die auf diese Weise erzeugten Spanplatten eine deutlich bessere Homogenität bezüglich ihrer Dichte- und Härteverteilung und einen besseren Faserzusammenhalt zeigen, bei reduziertem Bindemittelgehalt und -Bedarf.In comparison to arrangements with an input-side press roller, which touches the press drum 1 essentially almost linearly and thus only generates a brief pressure peak at the entrance to the press nip, after which the pressure drops again to a low value and enables the fibers to spring back, maintain the described arrangement of the pressure in the press section P for a substantially longer time without undesired pressure peaks and interruptions, with the result that the chipboard produced in this way has a significantly better homogeneity with regard to its density and hardness distribution and better fiber cohesion, with reduced Binder content and requirements.

Die dem Pressband 2 zugekehrte Oberfläche des Druckschuhes 10 ist mit Vorteil mit einer oder mehreren hydrostatischen Lagertaschen 11 versehen, welche über Druckleitungen 12 mit einem Schmiermittel unter bestimmtem Druck, beispielsweise einem hinreichend temperaturfesten Drucköl gespiesen sind. Hierdurch ist das Pressband 2 auf der Oberfläche des Druckschuhes 10 hydrostatisch gelagert und vermag nahezu reibungsfrei über die Druckschuh-Oberfläche zu gleiten. Ueber den in den Lagertaschen 11 eingestellten Druck kann gleichzeitig der in der Pressstrecke P erforderliche Pressdruck eingestellt werden. Ausserdem ist es von Vorteil, das zugeführte Drucköl auf eine Temperatur oberhalb der Aushärtungstemperatur des Bindemittels z.B. auf über 150oC, aufzuheizen, so dass damit auch das Pressband 2 beim Gleiten über die Lagertaschen 11 und das darauf transportierte Material 5 über der Aushärtungstemperatur gehalten wird. Eine vorgängige Aufheizung des Pressbandes 2 erfolgt dadurch, dass die Vorderseite 25 des Druckschuhes 10 eine Vorheizzone C aufweist, über die das Band 2 vor der Einlaufzone E hinweggleitet, wo diese ebenfalls mit hydrostatischen, über Leitungen 27 mit heissem Drucköl gespiesenen Lagertaschen 26 versehen ist.The surface of the pressure shoe 10 facing the press belt 2 is advantageously provided with one or more hydrostatic bearing pockets 11 which are fed via pressure lines 12 with a lubricant under a certain pressure, for example a sufficiently temperature-resistant pressure oil. As a result, the press belt 2 is mounted hydrostatically on the surface of the pressure shoe 10 and is able to slide over the pressure shoe surface almost without friction. The pressure required in the press section P can be set at the same time via the pressure set in the storage pockets 11. It is also an advantage that supplied pressure oil to a temperature above the curing temperature of the binder, for example, to about 150 o C to heat, so that thus also the press belt 2 is held while sliding over the bearing pockets 11 and the transported material out 5 above the curing temperature. A preliminary heating of the press belt 2 takes place in that the front side 25 of the pressure shoe 10 has a preheating zone C, over which the belt 2 slides in front of the inlet zone E, where this is also provided with hydrostatic bearing pockets 26 fed with lines of hot pressure oil via lines 27.

Im Prinzip genügt häufig ein einziger genügend langer Druckschuh 10. Mit Vorteil können jedoch dem eingangsseitigen Druckschuh 10 in der Pressstrecke P nachgeschaltet weitere analog aufgebaute Druckschuhe 13, 14 und 15 vorgesehen sein, welche sich aneinander praktisch ohne Unterbruch anschliessen. Die Lagertaschen dieser nachgeschalteten Pressschuhe 13, 14 und 15 können mit Drucköl unterschiedlichen Druckes gespiesen sein, so dass sich ein sukzessive stufenweise abnehmender Pressdruck bilden lässt, z.B. beim eingangsseitigen Druckschuh 10 ein Pressdruck von 30 - 50 bar, welcher bei den nachgeschalteten Druckschuhen stufenweise auf 2 - 3 bar abnimmt. Durch die Verteilung des Pressdruckes auf die gesamte Pressstrecke, anstelle weniger linienförmiger Belastungen, wird eine störende schalenförmige Verformung der Presstrommel in Umfangsrichtung vermieden.In principle, a single sufficiently long pressure shoe 10 is often sufficient. Advantageously, however, further pressure shoes 13, 14 and 15 of similar construction can be provided downstream of the input-side pressure shoe 10 in the pressing section P, which pressure shoes connect practically without interruption. The bearing pockets of these downstream pressure shoes 13, 14 and 15 can be supplied with pressure oil of different pressure, so that a gradually decreasing pressure can be formed, for example with the pressure shoe 10 on the inlet side a pressure of 30-50 bar, which in the case of the downstream pressure shoes gradually increases to 2 - decreases 3 bar. By distributing the pressing pressure over the entire pressing section, instead of less linear loads, an annoying bowl-shaped deformation of the pressing drum in the circumferential direction is avoided.

Die Druckschuhe 10, sowie 13, 14, 15 können bezüglich der Presstrommel 1 in einer ortsfesten Position angeordnet sein mit vorgegebenem Abstand, oder mittels Verstelleinrichtungen 23 gegen die Presstrommel 1 zwecks Einstellung des Spaltes in der Pressstrecke P in Pressrichtung verstellbar sein, z.B. manuell mittels Spindeln oder automatisch mittels elektrischer, magnetischer, pneumatischer oder hydraulischer Steuerung. Im letzteren Fall können sie auf hydraulischen, mit Druckmittel einstellbaren Druckes versorgten Druckräumen beweglich sein, wobei auch dasselbe Druckmittel verwendet werden kann, wie für die Versorgung der Lagertaschen 11.The pressure shoes 10, as well as 13, 14, 15 can be arranged in a fixed position with respect to the press drum 1 at a predetermined distance, or can be adjusted by means of adjusting devices 23 against the press drum 1 for the purpose of adjusting the gap in the press path P in the press direction, e.g. manually using spindles or automatically using electrical, magnetic, pneumatic or hydraulic controls. In the latter case, they can be movable on hydraulic pressure spaces supplied with pressure-adjustable pressure, wherein the same pressure medium can also be used as for supplying the storage pockets 11.

Am Schluss der Pressstrecke P kann eine Formwalze 6 vorgesehen sein, welche der schon weitgehend ausgehärteten Spanplatte 7 durch Ausübung eines höheren Pressdruckes als den des letzten Druckschuhes 15 definitiv die gewünschte Form gibt und konditioniert, beispielsweise das angestrebte Dickenprofil. Mit Vorteil ist diese Formwalze mit einem um einen drehfest eingespannten Träger 16 rotierbaren Mantel 17 ausgerüstet, welcher mit einem oder mehreren Stützelementen 18 mit einstellbarer Stützkraft in Pressrichtung gegen den Träger 16 abgestützt ist. Das Stützelement 18 kann eine durchgehende Stützleiste sein oder es können in Achsenrichtung nebeneinander mehrere Stützelemente vorgesehen sein, mit welchen ein bestimmtes Dickenprofil hergestellt werden kann. Dabei können die Stützelemente 18 in an sich bekannter Weise als nachfahrende hydrostatische Stützelemente mit individuell steuerbarer Presskraft ausgebildet sein oder in anderer bekannter Weise, oder der gesamte pressseitige Halbraum h ist als durch Dichtleisten 24 abgeschlossene Druckkammer ausgebildet. Die Formwalze 6 kann in Trommelumfangsrichtung verstellbar sein, um die Aushärtestrecke zu variieren. Jedoch kann auch der letzte Druckschuh als Formelement dienen, sofern dieser einen zur Formgebung ausreichenden Pressdruck ausübt, unter Verzicht auf eine Formwalze. Durch die Ausbildung der Presstrommel und der Formwalze als sogenannte Durchbiegungsausgleichswalzen kann ein gleichförmiger und ebener Pressspalt erreicht werden, und damit eine gleichförmige Dicke und eine ebene Form der erzeugten Spanplatten.At the end of the press section P, a shaping roller 6 can be provided, which gives the already largely hardened chipboard 7 the desired shape and conditions, for example the desired thickness profile, by exerting a higher pressing pressure than that of the last pressure shoe 15. This shaping roller is advantageously equipped with a jacket 17 which can be rotated about a carrier 16 which is clamped in a rotationally fixed manner and which is supported against the carrier 16 with one or more supporting elements 18 with adjustable supporting force in the pressing direction. The support element 18 can be a continuous support strip or a plurality of support elements can be provided next to one another in the axial direction, with which a specific thickness profile can be produced. The support elements 18 can be designed in a manner known per se as trailing hydrostatic support elements with individually controllable pressing force or in another known manner, or the entire press-side half-space h is designed as a pressure chamber closed by sealing strips 24. The shaping roller 6 can be adjustable in the drum circumferential direction in order to vary the curing distance. However, the last pressure shoe can also serve as a shaped element, provided that it exerts a sufficient pressing pressure for shaping, without a shaping roller. By forming the press drum and the forming roll as so-called deflection compensation rolls, a uniform and flat press nip can be achieved, and thus a uniform thickness and a flat shape of the chipboard produced.

Claims (10)

Die Erfindung betrifft eine Einrichtung zur kontinuierlichen Herstellung von Spanplatten, Faserplatten oder dgl. aus einem zerspanten oder zerfaserten, mit einem druck- und/oder thermohärtenden Bindemittel vermischten, lignocellulose- oder cellulosehaltigem Ausgangsmaterial (5) mit einer beheizbaren Presstrommel (1) und einem endlosen, über Umlenkwalzen geführten metallischen Pressband (2), welches die Presstrommel (1) auf einem Teil ihres Umfanges unter Bildung einer Pressstrecke (P) für das zu verdichtende, über die Aushärtetemperatur des Bindemittels erwärmte Material umschliesst, wobei wenigstens eine das Pressband (1) flächenmässig mit einem bestimmten Press-Druck beaufschlagende Anpresseinrichtung (10, 13, 14, 15) vorgesehen ist, dadurch gekennzeichnet, dass die Presstrommel (1) einen drehfesten Träger (19) und einen gegen diesen rotierbaren mit wenigstens einem Stützelement (21) mit einstellbarer Stützkraft abgestützten Mantel (20) aufweist.The invention relates to a device for the continuous production of chipboard, fiberboard or the like. From a machined or shredded, mixed with a pressure and / or thermosetting binder, lignocellulosic or cellulose-containing starting material (5) with a heatable press drum (1) and an endless one , metallic press belt (2) guided over deflection rollers, which surrounds the press drum (1) over part of its circumference, forming a press section (P) for the material to be compressed, which is heated above the curing temperature of the binder, at least one of which press belt (1) A pressing device (10, 13, 14, 15) with a specific pressing pressure in terms of area is provided, characterized in that the pressing drum (1) has a non-rotatable support (19) and one which is rotatable relative to the latter and can be adjusted with at least one support element (21) Supporting supported jacket (20). Einrichtung nach Anspruch 1, dadurch gekennzeichnet, die Presstrommel (1) mehrere in Achsenrichtung nebeneinander angeordnete Stützelemente (21) mit individuell einstellbarer Stützkraft aufweist.Device according to claim 1, characterized in that the pressing drum (1) has a plurality of supporting elements (21) arranged side by side in the axial direction with individually adjustable supporting force. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Stützvorrichtung als an der Pressseite der Presstrommel (1) vorgesehener, durch eine Dichtleiste (24) abgedichteter, mit Druckfluid füllbarer Teilraum, insbesondere Halbraum (H) ausgebildet istDevice according to claim 1, characterized in that the support device is designed as a partial space, in particular half space (H), which is provided on the press side of the press drum (1) and is sealed by a sealing strip (24) and can be filled with pressurized fluid Einrichtung nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, dass die Presseinrichtung zumindest an der Eingangsseite in die Pressstrecke durch einen Druckschuh (10) mit hydraulischer Lagerfläche (11) gebildet wird, welcher mit der Presstrommel (1) eine sich allmählich verengende Einlaufzone (E) und eine anschliessende, sich über einen gewissen Umfang der Presstrommel (1) erstreckenden Pressstrecken-Bereich (P) mit angenähert gleichförmigem Pressdruck und/oder Abstand von der Presstrommel bildet.Device according to one of claims 1 - 3, characterized in that the pressing device is formed at least on the input side into the pressing section by a pressure shoe (10) with a hydraulic bearing surface (11), which with the press drum (1) has a gradually narrowing inlet zone ( E) and a subsequent pressing section area (P), which extends over a certain circumference of the pressing drum (1), with an approximately uniform pressing pressure and / or distance from the pressing drum. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass in der Pressstrecke (P) unmittelbar anschliessend an den Druckschuh (10) wenigstens ein weiterer Druckschuh (13, 14, 15) mit hydraulischer Lagerfläche mit einstellbarem Pressdruck angeordnet ist.Device according to claim 4, characterized in that at least one further pressure shoe (13, 14, 15) with a hydraulic bearing surface with an adjustable pressing pressure is arranged in the pressing section (P) immediately following the pressure shoe (10). Einrichtung nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass in der Pressstrecke (P) nach dem letzten Druckschuh (15) eine Formwalze (16) angeordnet ist, die einen höheren Pressdruck auf das Pressband (2) ausübt als der letzte Druckschuh (15).Device according to one of claims 1-5, characterized in that a forming roller (16) is arranged in the press section (P) after the last press shoe (15), which exerts a higher press pressure on the press belt (2) than the last press shoe ( 15). Einrichtung nach Anspruche 6, dadurch gekennzeichnet, dass die Formwalze (6) einen drehfesten Träger (16,) und einen gegen diesen rotierbaren mit wenigstens einer Stützvorrichtung (18,) mit einstellbarer Stützkraft abgestützten Mantel (17) aufweist.Device according to claim 6, characterized in that the form roller (6) has a rotationally fixed Carrier (16,) and a jacket (17) rotatably supported against it with at least one support device (18,) with adjustable support force. Einrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Formwalze (6) mehrere in Achsenrichtung nebeneinander angeordnete Stützelemente (18) mit individuell einstellbarer Stützkraft aufweist.Device according to claim 7, characterized in that the shaping roller (6) has a plurality of supporting elements (18) arranged side by side in the axial direction with individually adjustable supporting force. Einrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Formwalze (6) in Richtung der Bewegung des Pressbandes (2) verstellbar ist.Device according to claim 7, characterized in that the shaping roller (6) is adjustable in the direction of the movement of the press belt (2). Einrichtung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass die Formwalze (6) an ihrer Pressseite einen durch Dichtleisten (24) abgedichteten, mit Druckfluid füllbaren Teilraum, insbesondere einen Halbraum (h) aufweist.Device according to one of claims 1-6, characterized in that the forming roll (6) has on its press side a partial space, in particular a half space (h), which is sealed by sealing strips (24) and can be filled with pressurized fluid.
EP93202303A 1993-06-25 1993-06-25 Device for the continuous production of particle boards, fibre boards or the like Expired - Lifetime EP0630725B1 (en)

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Also Published As

Publication number Publication date
EP0630726A1 (en) 1994-12-28
US5527422A (en) 1996-06-18
RU94028279A (en) 1996-06-27
ES2121977T3 (en) 1998-12-16
ES2121931T3 (en) 1998-12-16
DE59308992D1 (en) 1998-10-22
RU2066634C1 (en) 1996-09-20
DE59308993D1 (en) 1998-10-22
EP0630726B1 (en) 1998-09-16
RU2067930C1 (en) 1996-10-20
EP0630725B1 (en) 1998-09-16

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