EP0909620B1 - Continuous press for pressing mats into boards - Google Patents

Continuous press for pressing mats into boards Download PDF

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Publication number
EP0909620B1
EP0909620B1 EP98117030A EP98117030A EP0909620B1 EP 0909620 B1 EP0909620 B1 EP 0909620B1 EP 98117030 A EP98117030 A EP 98117030A EP 98117030 A EP98117030 A EP 98117030A EP 0909620 B1 EP0909620 B1 EP 0909620B1
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EP
European Patent Office
Prior art keywords
press
feed
inlet
cylinder
platens
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.)
Expired - Lifetime
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EP98117030A
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German (de)
French (fr)
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EP0909620A2 (en
EP0909620A3 (en
Inventor
Horst Weiss
Lothar Dipl.-Ing. Sebastian
Klaus Dipl.-Ing. Schürmann
Werner Gawlitta
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Priority claimed from DE19740325A external-priority patent/DE19740325C5/en
Priority claimed from DE19829742A external-priority patent/DE19829742C1/en
Priority claimed from DE19829741A external-priority patent/DE19829741C1/en
Application filed by Siempelkamp Maschinen und Anlagenbau GmbH and Co KG filed Critical Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Publication of EP0909620A2 publication Critical patent/EP0909620A2/en
Publication of EP0909620A3 publication Critical patent/EP0909620A3/en
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    • 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
    • B30B5/06—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 co-operating with another endless band
    • 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
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone

Definitions

  • the invention relates to a continuous press for pressing pressed material mats into pressed material boards in the course of the production of chipboard, fiberboard and other wood-based panels, with press lower part and upper press part, in the lower part and upper part of the press, endlessly rotating steel press belts, and with an inlet mouth, wherein a heatable press plate is arranged in the lower press part and in the upper press part and adjoin the press plates protruding heatable inlet plates to form the inlet mouth, furthermore the steel sheet press belts are supported on the press plates and inlet plates with the interposition of rolling elements, and also a device for adjusting the Inlet edge of the inlet mouth and at least one device for adjusting the inlet contour of the inlet mouth are provided.
  • Such a press is known in which the Device for setting the inlet contour one Has contour slide on one of the concerned Guide plate assigned press spar and with With the help of an inlet contour actuator in the inlet direction is adjustable.
  • the inlet contour slide points to Inlet plate a plurality of transverse to the direction of entry trending steps that one belong to the contour-defining support staircase.
  • the Support stairs are assigned at least one counter bar, which is connected to the relevant inlet plate.
  • the device for adjusting the inlet plate is the counter bar can be selected against one of the levels of Support stairs can be put on. In this way, the Leading edges of the inlet mouth to different adjust operational conditions.
  • that is Adjustment of the bending lines of the relevant inlet plate only gradually and consequently in limited areas possible, with only a trumpet-shaped Enema mouth can be realized (see. DE 44 33 641).
  • a continuous press is also known at which is the top of the two heated inlet plates divided into plate sections to form joints is, so that the inlet contour of the inlet mouth in the Hinge areas has kinks. This also applies to the transition area between the upper inlet plate and the subsequent upper press plate.
  • This known embodiment is by means of hydraulic Actuators only the angular position of the plate sections adjusted around the axes of rotation of the joints. Especially problematic is the fact that the assigned Sheet steel press belt when driving over the kinks experiences corresponding bends and consequently one is subject to immediate wear and tear (cf. DE 195 18 879).
  • the invention has for its object a continuous Press the described above
  • To create embodiment in which the Inlet contour of the inlet mouth is steplessly generated can set any continuous bending lines and even an almost parallel position from the top inlet plate and lower inlet plate up to the neutral zero line of the press inlet also for pressing extreme thin pressed material mats to perfect pressed material plates under Consideration of high production speeds is adjustable.
  • the invention solves this problem with a generic one continuous press in that the device for Setting the inlet contour a plurality of Cylinder piston assemblies has that the cylinder piston assemblies in a predetermined distribution on the one hand to the upper and / or lower inlet plate, on the other hand to the Upper press part and / or lower press part are articulated, and that the cylinder piston assemblies to a computer-controlled or -controlled hydraulic system connected are.
  • the cylinder piston arrangements are preferably around double-acting differential cylinders.
  • any and continuous bend lines are related on the upper inlet plate and possibly also in relation to the lower inlet plate by means of the tensile and / or compressive forces generating differential cylinder set so that the inlet contour in adaptation to the respective operating conditions every required bending radius can accept and therefore a fully variable press inlet is available.
  • that of the Press plates formed a press zone from the inlet plates formed clamping zone upstream. Such Clamping zone is required to e.g. B. in the manufacture of Press plates made of extremely thin mats with a Mat thickness of, for example, only 3 mm and below Consideration of high production speeds up to 1,000 mm / s to avoid mat breaking.
  • the upper inlet plate has a bending radius to the effect that between the upper Inlet plate and the lower inlet plate an almost Parallel position is reached, which extends up to extends below the neutral zero line of the press inlet. Almost parallel location means that a slight taper for running in and lightly clamping the relevant Pressed material mats is set.
  • the inlet mouth or his Inlet contour can also within the scope of the invention as before for the production of thick pressed boards in the previous mode of operation set trumpet-shaped be such that the compression from above and done almost evenly at the bottom. -
  • the setting of the Inlet contour depends on the to pressing mats and especially the mat thickness.
  • the mat values for the suitable bending lines or Bending radii of the upper and, if necessary, lower inlet plate can be done using a conventional path measurement technique record and send it to a computer.
  • This calculator determines the necessary correction values and influences the hydraulic control or regulation of the differential cylinders in such a way that the inlet plate in question or plates in the desired by tensile and compressive forces Be brought into shape.
  • differential cylinders are preferred in longitudinal rows and possibly transverse rows on the top and / or articulated lower inlet plate and have the inlet plates in the longitudinal direction of the board or in the direction of entry running channels for the heating medium.
  • the embodiment is based on the knowledge that longitudinally drilled inlet plates in the course of adjustment the bending lines or bending radii of the differential cylinders generated bending moments as opposed to transverse drilled inlet plates taking into account the occurring voltage states take up much cheaper can.
  • Another embodiment of the invention provides that the Differential cylinder gimbal on the upper and / or lower inlet plate and on the press top and / or Press lower part are hinged, and that the articulation of the Differential cylinder on the upper and / or lower Inlet plate with thermal insulation is made.
  • the gimbals Joints of the differential cylinders with interposition supported by insulating material against the inlet plates be, which in turn with the interposition of Thermal insulation on frame parts of press top and Press base can support.
  • the Hydraulic supply to the differential cylinder under Interposition of a cooling device with a heat exchanger to be done taking into account the heated inlet plates occurring relatively high Temperatures ensure that the differential cylinders work properly to ensure.
  • This press instructs Press lower part 3 and an upper press part 4, namely with endless in the lower press part 3 and upper press part 4 circumferential sheet steel press belts 5 and with a Inlet jaw E.
  • a heatable press plate 6, 7 is arranged, of which the upper press plate according to the embodiment 6 against the lower press plate 7 for setting the Press nip is adjustable. Press plates 6, 7 close heatable cantilever on the inlet side Inlet plates 8, 9 to form the inlet mouth E.
  • the steel sheet press belts 5 are on the press plates 6, 7 and Inlet plates 8, 9 with the interposition of rolling elements 10 or rolling rods supported. Furthermore, a device 11 for adjusting the inlet edges of the inlet mouth E and a device 12 for setting the inlet contour of the inlet mouth E intended.
  • the device 12 for setting the Inlet contour has a plurality of double-acting Differential cylinders 13 on.
  • the differential cylinders 13 are in a predetermined distribution and according to Embodiment on the one hand to the upper inlet plate 8 and on the other hand articulated to the press upper part 4. Further are the differential cylinders 13 to a computer-controlled or regulated hydraulic system 14 connected.
  • the Computer 15 and a measuring system 16, which the Mat thickness of the mats to be pressed 2 measures and forwarded to the computer 15 are only indicated.
  • the differential cylinders 13 are in longitudinal rows and Cross rows hinged to the upper inlet plate 8. At least this upper inlet plate 8 is drilled lengthways and consequently points in the longitudinal direction of the plate or in the direction of entry extending channels 18 for the heating medium. Due to the longitudinal channels 18 is the upper inlet plate for Absorption of much higher bending stresses than with transverse channels set up.
  • the differential cylinders 13 are gimbaled on the upper inlet plate 8 and articulated on the press upper part 4.
  • the linkage 19 the differential cylinder 13 on the upper inlet plate 8 is with the interposition of thermal insulation 20th realized.
  • the hydraulic supply to the Differential cylinder 13 with the interposition of one Cooling device done with a heat exchanger, which is not is shown.
  • the lower inlet plate 9 is below Interposition of thermal insulation 20 in the lower press part 3 supported.
  • the mouth has E a trumpet-like inlet contour for the Pressing of relatively thick pressed material mats 2.
  • 2 is one of the pressing zone 21 upstream Clamping zone 22 realized. After that form the top one Inlet plate 8 and the lower inlet plate 9 in almost Parallel position an inlet contour with an inlet of only low taper for relatively thin pressed material mats 2a.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Control Of Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Description

Die Erfindung betrifft eine kontinuierliche Presse zum Verpressen von Preßgutmatten zu Preßgutplatten im Zuge der Herstellung von Spanplatten, Faserplatten und anderen Holzwerkstoffplatten, mit Pressenunterteil und Pressenoberteil, im Pressenunterteil und Pressenoberteil endlos umlaufenden Stahlblechpreßbändern, und mit einem Einlaufmaul,
wobei im Pressenunterteil und im Pressenoberteil jeweils eine beheizbare Preßplatte angeordnet ist und sich an die Preßplatten einlaufseitig vorkragende beheizbare Einlaufplatten unter Bildung des Einlaufmauls anschließen, wobei ferner die Stahlblechpreßbänder an den Preßplatten und Einlaufplatten unter Zwischenschaltung von Wälzkörpern abgestützt sind, wobei außerdem eine Vorrichtung zur Einstellung der Einlaufkante des Einlaufmauls und zumindest eine Vorrichtung zur Einstellung der Einlaufkontur des Einlaufmauls vorgesehen sind.The invention relates to a continuous press for pressing pressed material mats into pressed material boards in the course of the production of chipboard, fiberboard and other wood-based panels, with press lower part and upper press part, in the lower part and upper part of the press, endlessly rotating steel press belts, and with an inlet mouth,
wherein a heatable press plate is arranged in the lower press part and in the upper press part and adjoin the press plates protruding heatable inlet plates to form the inlet mouth, furthermore the steel sheet press belts are supported on the press plates and inlet plates with the interposition of rolling elements, and also a device for adjusting the Inlet edge of the inlet mouth and at least one device for adjusting the inlet contour of the inlet mouth are provided.

Es ist eine derartige Presse bekannt, bei welcher die Einrichtung zur Einstellung der Einlaufkontur einen Konturschieber aufweist, der an einem der betreffenden Einlaufplatte zugeordneten Pressenholm geführt und mit Hilfe eines Einlaufkonturstelltriebes in Einlaufrichtung verstellbar ist. Der Einlaufkonturschieber weist zur Einlaufplatte hin eine Mehrzahl von quer zur Einlaufrichtung verlaufenden Stufen auf, die einer konturdefinierenden Abstütztreppe angehören. Der Abstütztreppe ist zumindest eine Gegenleiste zugeordnet, die mit der betreffenden Einlaufplatte verbunden ist. Mit Hilfe der Vorrichtung zur Einstellung der Einlaufplatte ist die Gegenleiste wählbar gegen eine der Stufen der Abstütztreppe anlegbar. Auf diese Weise lassen sich die Einlaufkanten des Einlaufmauls an unterschiedliche betriebliche Verhältnisse anpassen. Allerdings ist die Einstellung der Biegelinien der betreffenden Einlaufplatte nur stufenartig und folglich in begrenzten Bereichen möglich, wobei sich lediglich ein trompetenförmiges Einlaufmaul verwirklichen läßt (vgl. DE 44 33 641).Such a press is known in which the Device for setting the inlet contour one Has contour slide on one of the concerned Guide plate assigned press spar and with With the help of an inlet contour actuator in the inlet direction is adjustable. The inlet contour slide points to Inlet plate a plurality of transverse to the direction of entry trending steps that one belong to the contour-defining support staircase. The Support stairs are assigned at least one counter bar, which is connected to the relevant inlet plate. With Help the device for adjusting the inlet plate is the counter bar can be selected against one of the levels of Support stairs can be put on. In this way, the Leading edges of the inlet mouth to different adjust operational conditions. However, that is Adjustment of the bending lines of the relevant inlet plate only gradually and consequently in limited areas possible, with only a trumpet-shaped Enema mouth can be realized (see. DE 44 33 641).

Es ist außerdem eine kontinuierliche Presse bekannt, bei welcher die obere der beiden beheizbaren Einlaufplatten unter Bildung von Gelenken in Plattenabschnitte unterteilt ist, so daß die Einlaufkontur des Einlaufmauls in den Gelenkbereichen Knickstellen aufweist. Das gilt auch für den Übergangsbereich zwischen der oberen Einlaufplatte und der sich anschließenden oberen Preßplatte. Bei dieser bekannten Ausführungsform wird mittels hydraulischer Stellglieder lediglich die Winkellage der Plattenabschnitte um die Drehachsen der Gelenke verstellt. Besonders problematisch ist die Tatsache, daß das zugeordnete Stahlblechpreßband beim Überfahren der Knickstellen entsprechende Abknickungen erfährt und folglich einem alsbaldigen Verschleiß unterliegt (vgl. DE 195 18 879).A continuous press is also known at which is the top of the two heated inlet plates divided into plate sections to form joints is, so that the inlet contour of the inlet mouth in the Hinge areas has kinks. This also applies to the transition area between the upper inlet plate and the subsequent upper press plate. At this known embodiment is by means of hydraulic Actuators only the angular position of the plate sections adjusted around the axes of rotation of the joints. Especially problematic is the fact that the assigned Sheet steel press belt when driving over the kinks experiences corresponding bends and consequently one is subject to immediate wear and tear (cf. DE 195 18 879).

Der Erfindung liegt die Aufgabe zugrunde, eine kontinuierliche Presse der eingangs beschriebenen Ausführungsform zu schaffen, bei welcher sich die Einlaufkontur des Einlaufmauls stufenlos unter Erzeugung beliebiger kontinuierlicher Biegelinien einstellen läßt und selbst eine nahezu Parallellage von oberer Einlaufplatte und unterer Einlaufplatte bis über die neutrale Nullinie des Presseneinlaufs hinaus zum Verpressen auch von extrem dünnen Preßgutmatten zu einwandfreien Preßgutplatten unter Berücksichtigung hoher Produktionsgeschwindigkeiten einstellbar ist.The invention has for its object a continuous Press the described above To create embodiment in which the Inlet contour of the inlet mouth is steplessly generated can set any continuous bending lines and even an almost parallel position from the top inlet plate and lower inlet plate up to the neutral zero line of the press inlet also for pressing extreme thin pressed material mats to perfect pressed material plates under Consideration of high production speeds is adjustable.

Diese Aufgabe löst die Erfindung bei einer gattungsgemäßen kontinuierlichen Presse dadurch, daß die Vorrichtung zur Einstellung der Einlaufkontur eine Mehrzahl von Zylinderkolbenanordnungen aufweist, daß die Zylinderkolbenanordnungen in vorgegebener Verteilung einerseits an die obere und/oder untere Einlaufplatte, andererseits an das Pressenoberteil und/oder Pressenunterteil angelenkt sind, und daß die Zylinderkolbenanordnungen an ein rechnergesteuertes oder -geregeltes Hydrauliksystem angeschlossen sind. Bei den Zylinderkolbenanordnungen handelt es sich bevorzugt um doppeltwirkende Differentialzylinder. - Diese Maßnahmen der Erfindung haben zunächst einmal zur Folge, daß sich beliebige und kontinuierliche Biegelinien in bezug auf die obere Einlaufplatte und ggf. auch in bezug auf die untere Einlaufplatte mittels der Zug- und/oder Druckkräfte erzeugenden Differentialzylinder einstellen lassen, so daß die Einlaufkontur in Anpassung an die jeweiligen betrieblichen Verhältnisse jeden erforderlichen Biegeradius annehmen kann und folglich ein vollvariabler Presseneinlauf zur Verfügung steht. Hinzu kommt, daß sich der von den Preßplatten gebildeten Preßzone eine von den Einlaufplatten gebildete Einspannzone vorschalten läßt. Eine solche Einspannzone ist erforderlich, um z. B. beim Herstellen von Preßplatten aus extrem dünnen Preßgutmatten mit einer Mattendicke von beispielsweise lediglich 3 mm und unter Berücksichtigung hoher Produktionsgeschwindigkeiten bis zu 1.000 mm/s einen Mattenabriß zu vermeiden. Tatsächlich hat sich herausgestellt, daß beim Einlaufen einer Preßgutmatte in das Einlaufmaul zwangsläufig Luft eingeschlossen wird, während die Späne, Fasern o. dgl. verdichtet werden. Bei erhöhten Produktionsgeschwindigkeiten kommt es dann zu einem Mattenabriß. Dieser Mattenabriß ist vermutlich auf eingeschlossene Luftblasen zurückzuführen, die beim Verpressen der Preßgutmatten explosionsartig platzen, so daß eine Beschädigung selbst der Stahlblechpreßbänder nicht ausgeschlossen ist. Da sich nach Lehre der Erfindung der Preßzone eine Einspannzone durch eine entsprechende Gestaltung der Einlaufkontur des Einlaufmauls vorschalten läßt, entweicht mitgeführte Luft bereits in der Einspannzone, so daß eine schädliche Blasenbildung vermieden wird und in der Preßzone dann nicht länger Mattenabriß und Stahlblechpreßbandbeschädigungen durch platzende Luftblasen zu befürchten sind. Für das Verpressen von extrem dünnen Preßgutmatten läßt sich für beispielsweise die obere Einlaufplatte ein Biegeradius dahingehend verwirklichen, daß zwischen der oberen Einlaufplatte und der unteren Einlaufplatte eine nahezu Parallellage erreicht wird, welche sich einlaufseitig bis unter die neutrale Nullinie des Presseneinlaufes erstreckt. Nahezu Parallellage meint, daß eine geringfügige Konizität zum Einlaufen und leichten Einspannen der betreffenden Preßgutmatten eingestellt wird. Das Einlaufmaul bzw. seine Einlaufkontur kann im Rahmen der Erfindung aber auch nach wie vor für die Produktion von dicken Preßgutplatten in der bisherigen Betriebsweise trompetenförmig eingestellt werden, und zwar derart, daß die Verdichtung von oben und unten nahezu gleichmäßig erfolgt. - Die Einstellung der Einlaufkontur erfolgt in Abhängigkeit von den zu verpressenden Preßgutmatten und insbesondere der Mattendicke. Die Mättenwerte für die geeigneten Biegelinien bzw. Biegeradien der oberen und ggf. unteren Einlaufplatte lassen sich im Wege einer herkömmlichen Wegemeßtechnik erfassen und einem Rechner zuleiten. Dieser Rechner ermittelt die notwendigen Korrekturwerte und beeinflußt die hydraulische Steuerung bzw. Regelung der Differentialzylinder in der Weise, daß die betreffende Einlaufplatte oder -platten durch Zug- und Druckkräfte in die gewünschte Form gebracht werden.The invention solves this problem with a generic one continuous press in that the device for Setting the inlet contour a plurality of Cylinder piston assemblies has that the cylinder piston assemblies in a predetermined distribution on the one hand to the upper and / or lower inlet plate, on the other hand to the Upper press part and / or lower press part are articulated, and that the cylinder piston assemblies to a computer-controlled or -controlled hydraulic system connected are. The cylinder piston arrangements are preferably around double-acting differential cylinders. - This First of all, measures of the invention result in that any and continuous bend lines are related on the upper inlet plate and possibly also in relation to the lower inlet plate by means of the tensile and / or compressive forces generating differential cylinder set so that the inlet contour in adaptation to the respective operating conditions every required bending radius can accept and therefore a fully variable press inlet is available. In addition, that of the Press plates formed a press zone from the inlet plates formed clamping zone upstream. Such Clamping zone is required to e.g. B. in the manufacture of Press plates made of extremely thin mats with a Mat thickness of, for example, only 3 mm and below Consideration of high production speeds up to 1,000 mm / s to avoid mat breaking. In fact has it turned out that when a mat pressed in air is inevitably trapped in the inlet mouth, while the chips, fibers or the like are being compacted. at increased production speeds then occur a mat tear off. This mat tear is probably open trapped air bubbles due to the Compress the mats of the explosion explosively, see above that damage to even the steel sheet press belts is not is excluded. Since according to the teaching of the invention Press zone a clamping zone by a corresponding one Connect the design of the inlet contour of the inlet mouth lets, entrained air already escapes in the Clamping zone so that harmful blistering is avoided and then no longer in the press zone Mat tear-off and damage to steel sheet press tape bursting air bubbles are to be feared. For pressing of extremely thin pressed material mats can be used for for example, the upper inlet plate has a bending radius to the effect that between the upper Inlet plate and the lower inlet plate an almost Parallel position is reached, which extends up to extends below the neutral zero line of the press inlet. Almost parallel location means that a slight taper for running in and lightly clamping the relevant Pressed material mats is set. The inlet mouth or his Inlet contour can also within the scope of the invention as before for the production of thick pressed boards in the previous mode of operation set trumpet-shaped be such that the compression from above and done almost evenly at the bottom. - The setting of the Inlet contour depends on the to pressing mats and especially the mat thickness. The mat values for the suitable bending lines or Bending radii of the upper and, if necessary, lower inlet plate can be done using a conventional path measurement technique record and send it to a computer. This calculator determines the necessary correction values and influences the hydraulic control or regulation of the differential cylinders in such a way that the inlet plate in question or plates in the desired by tensile and compressive forces Be brought into shape.

Weitere besondere Ausführungsarten der Erfindung sind im folgenden aufgeführt. So sind die Differentialzylinder vorzugsweise in Längsreihen und ggf. Querreihen an der oberen und/oder unteren Einlaufplatte angelenkt und weisen die Einlaufplatten in Plattenlängsrichtung bzw. Einlaufrichtung verlaufende Kanäle für das Heizmedium auf. In diesem Zusammenhang geht die Ausführurgsform von der Erkenntnis aus, daß längsgebohrte Einlaufplatten die im Zuge der Einstellung der Biegelinien bzw. Biegeradien von den Differentialzylindern erzeugten Biegemomente im Gegensatz zu quergebohrten Einlaufplatten unter Berücksichtigung der auftretenden Spannungszustände sehr viel günstiger aufnehmen können. Eine weitere Ausführungsart der Erfindung sieht vor, daß die Differentialzylinder kardanisch an der oberen und/oder unteren Einlaufplatte und an dem Pressenoberteil und/oder Pressenunterteil angelenkt sind, und daß die Anlenkung der Differentialzylinder an der oberen und/oder unteren Einlaufplatte unter Zwischenschaltung einer Wärmeisolation vorgenommen ist. So können beispielsweise die kardanischen Gelenke der Differentialzylinder unter Zwischenschaltung von Isoliermaterial gegen die Einlaufplatten abgestützt sein, die sich ihrerseits unter Zwischenschaltung von Wärmeisolierungen auf Rahmenteilen von Pressenoberteil und Pressenunterteil abstützen können. Außerdem kann die Hydraulikversorgung der Differentialzylinder unter Zwischenschaltung einer Kühleinrichtung mit einem Wärmetauscher erfolgen, um unter Berücksichtigung der an den beheizten Einlaufplatten auftretenden verhältnismäßig hohen Temperaturen eine einwandfreie Funktionsweise der Differentialzylinder zu gewährleisten.Further special embodiments of the invention are as follows listed. So the differential cylinders are preferred in longitudinal rows and possibly transverse rows on the top and / or articulated lower inlet plate and have the inlet plates in the longitudinal direction of the board or in the direction of entry running channels for the heating medium. In this The embodiment is based on the knowledge that longitudinally drilled inlet plates in the course of adjustment the bending lines or bending radii of the differential cylinders generated bending moments as opposed to transverse drilled inlet plates taking into account the occurring voltage states take up much cheaper can. Another embodiment of the invention provides that the Differential cylinder gimbal on the upper and / or lower inlet plate and on the press top and / or Press lower part are hinged, and that the articulation of the Differential cylinder on the upper and / or lower Inlet plate with thermal insulation is made. For example, the gimbals Joints of the differential cylinders with interposition supported by insulating material against the inlet plates be, which in turn with the interposition of Thermal insulation on frame parts of press top and Press base can support. In addition, the Hydraulic supply to the differential cylinder under Interposition of a cooling device with a heat exchanger to be done taking into account the heated inlet plates occurring relatively high Temperatures ensure that the differential cylinders work properly to ensure.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen:

Fig. 1
ausschnittsweise eine kontinuierliche Presse in Seitenansicht mit trompetenförmiger Einlaufkontur des Einlaufmauls,
Fig. 2
den Gegenstand nach Fig. 1 in schematischer Seitenansicht mit einer nahezu Parallellage der Einlaufplatten mit unter die neutrale Nullinie des Presseneinlaufs heruntergebogener oberer Einlaufplatte für das Verpressen extrem dünner Preßgutmatten und
Fig. 3
einen Querschnitt A-B durch die obere Einlaufplatte mit angedeutem Stahlblechpreßband.
The invention is explained in more detail below with reference to a drawing which represents only one exemplary embodiment. Show it:
Fig. 1
sections of a continuous press in side view with a trumpet-shaped inlet contour of the inlet mouth,
Fig. 2
1 in a schematic side view with an almost parallel position of the inlet plates with the upper inlet plate bent down below the neutral zero line of the press inlet for pressing extremely thin mats of pressed material and
Fig. 3
a cross section AB through the upper inlet plate with indicated sheet steel press belt.

In den Figuren ist eine kontinuierliche Presse 1 zum Verpressen von Preßgutmatten 2 zu Preßgutplatten im Zuge der Herstellung von Spanplatten, Faserplatten und anderen Holzwerkstoffplatten dargestellt. Diese Presse weist ein Pressenunterteil 3 und ein Pressenoberteil 4 auf, und zwar mit im Pressenunterteil 3 und Pressenoberteil 4 endlos umlaufenden Stahlblechpreßbändern 5 sowie mit einem Einlaufmaul E. Im Pressenunterteil 3 und im Pressenoberteil 4 ist jeweils eine beheizbare Preßplatte 6, 7 angeordnet, von denen nach dem Ausführungsbeispiel die obere Preßplatte 6 gegen die untere Preßplatte 7 zur Einstellung des Preßspaltes verstellbar ist. An die Preßplatten 6, 7 schließen sich einlaufseitig vorkragende beheizbare Einlaufplatten 8, 9 unter Bildung des Einlaufmauls E an. Die Stahlblechpreßbänder 5 sind an den Preßplatten 6, 7 und Einlaufplatten 8, 9 unter Zwischenschaltung von Wälzkörpern 10 bzw. Rollstäben abgestützt. Ferner ist eine Vorrichtung 11 zur Einstellung der Einlaufkanten des Einlaufmauls E und eine Vorrichtung 12 zur Einstellung der Einlaufkontur des Einlaufmauls E vorgesehen. Die Vorrichtung 12 zur Einstellung der Einlaufkontur weist eine Mehrzahl von doppeltwirkenden Differentialzylindern 13 auf. Die Differentialzylinder 13 sind in vorgegebener Verteilung und nach dem Ausführungsbeispiel einerseits an die obere Einlaufplatte 8 und andererseits an das Pressenoberteil 4 angelenkt. Ferner sind die Differentialzylinder 13 an ein rechnergesteuertes oder geregeltes Hydrauliksystem 14 angeschlossen. Der Rechner 15 und ein Wegemeßsystem 16, welches die Mattendicke der zu verpressenden Preßgutmatten 2 mißt und an den Rechner 15 weitergibt, sind lediglich angedeutet. In the figures there is a continuous press 1 for Pressing pressed material mats 2 to pressed material plates in the course the production of chipboard, fiberboard and others Wood-based panels shown. This press instructs Press lower part 3 and an upper press part 4, namely with endless in the lower press part 3 and upper press part 4 circumferential sheet steel press belts 5 and with a Inlet jaw E. In the lower press part 3 and in the upper press part 4, a heatable press plate 6, 7 is arranged, of which the upper press plate according to the embodiment 6 against the lower press plate 7 for setting the Press nip is adjustable. Press plates 6, 7 close heatable cantilever on the inlet side Inlet plates 8, 9 to form the inlet mouth E. The steel sheet press belts 5 are on the press plates 6, 7 and Inlet plates 8, 9 with the interposition of rolling elements 10 or rolling rods supported. Furthermore, a device 11 for adjusting the inlet edges of the inlet mouth E and a device 12 for setting the inlet contour of the inlet mouth E intended. The device 12 for setting the Inlet contour has a plurality of double-acting Differential cylinders 13 on. The differential cylinders 13 are in a predetermined distribution and according to Embodiment on the one hand to the upper inlet plate 8 and on the other hand articulated to the press upper part 4. Further are the differential cylinders 13 to a computer-controlled or regulated hydraulic system 14 connected. The Computer 15 and a measuring system 16, which the Mat thickness of the mats to be pressed 2 measures and forwarded to the computer 15 are only indicated.

Das gilt auch für eine im Bereich des Presseneinlaufs dem Einlaufmaul E vorgeordnete Beschickeinrichtung 17.This also applies to one in the area of the press inlet Inlet mouth E upstream loading device 17.

Die Differentialzylinder 13 sind in Längsreihen und Querreihen an der oberen Einlaufplatte 8 angelenkt. Zumindest diese obere Einlaufplatte 8 ist längsgebohrt und weist folglich in Plattenlängsrichtung bzw. Einlaufrichtung verlaufende Kanäle 18 für das Heizmedium auf. Aufgrund der längslaufenden Kanäle 18 ist die obere Einlaufplatte zur Aufnahme sehr viel höherer Biegespannungen als bei querlaufenden Kanälen eingerichtet. Die Differentialzylinder 13 sind kardanisch an der oberen Einlaufplatte 8 und an dem Pressenoberteil 4 angelenkt. Die Anlenkung 19 der Differentialzylinder 13 an der oberen Einlaufplatte 8 ist unter Zwischenschaltung von Wärmeisolierungen 20 verwirklicht. Außerdem kann die Hydraulikversorgung der Differentialzylinder 13 unter Zwischenschaltung einer Kühleinrichtung mit einem Wärmetauscher erfolgen, was nicht gezeigt ist. Die untere Einlaufplatte 9 ist unter Zwischenschaltung von Wärmeisolierungen 20 im Pressenunterteil 3 abgestützt.The differential cylinders 13 are in longitudinal rows and Cross rows hinged to the upper inlet plate 8. At least this upper inlet plate 8 is drilled lengthways and consequently points in the longitudinal direction of the plate or in the direction of entry extending channels 18 for the heating medium. Due to the longitudinal channels 18 is the upper inlet plate for Absorption of much higher bending stresses than with transverse channels set up. The differential cylinders 13 are gimbaled on the upper inlet plate 8 and articulated on the press upper part 4. The linkage 19 the differential cylinder 13 on the upper inlet plate 8 is with the interposition of thermal insulation 20th realized. In addition, the hydraulic supply to the Differential cylinder 13 with the interposition of one Cooling device done with a heat exchanger, which is not is shown. The lower inlet plate 9 is below Interposition of thermal insulation 20 in the lower press part 3 supported.

Bei dem Ausführungsbeispiel nach Fig. 1 weist das Einlaufmaul E eine trompetenartige Einlaufkontur für das Verpressen von verhältnismäßig dicken Preßgutmatten 2 auf. Nach Fig. 2 ist eine der Preßzone 21 vorgeschaltete Einspannzone 22 verwirklicht. Danach bilden die obere Einlaufplatte 8 und die untere Einlaufplatte 9 in nahezu Parallellage eine Einlaufkontur mit einem Einlauf von nur geringer Konizität für verhältnismäßig dünne Preßgutmatten 2a.In the embodiment of FIG. 1, the mouth has E a trumpet-like inlet contour for the Pressing of relatively thick pressed material mats 2. 2 is one of the pressing zone 21 upstream Clamping zone 22 realized. After that form the top one Inlet plate 8 and the lower inlet plate 9 in almost Parallel position an inlet contour with an inlet of only low taper for relatively thin pressed material mats 2a.

Claims (4)

  1. A continuous press for pressing mats of pressed material to form boards of pressed material in the course of manufacturing particle boards, fibre boards and other timber product boards, comprising a press upper part (3) and a press lower part (4), and continuously circulating sheet steel press belts (5) in the press upper part and press lower part, and comprising a feed opening (E),
    wherein a heatable press platen (6,7) is disposed in each case in the press upper part (3) and the press lower part (4), and heatable feed platens (8, 9) which protrude on the feed side adjoin the press platens and form the feed opening (E),
    wherein the sheet steel press belts (5) are supported on the press platens (6, 7) and feed platens (8, 9), with rolling bodies (10) interposed therebetween,
    wherein in addition a device (11) for adjusting (1) the feed edges of the feed opening and at least one device (12) for adjusting the feed contour of the feed opening are provided; characterised in that the device (12) for adjusting the feed contour comprises a multiplicity of cylinder-and-piston arrangements, e.g. double-acting differential cylinders (13), that the cylinder-and-piston arrangements (13) are coupled in a predetermined distribution firstly to the upper and/or lower feed platen (8, 9) and secondly to the press upper part (4) and/or press lower part (3), and that the cylinder-and-piston arrangements (13) are connected to a computer-controlled or -regulated hydraulic system (14).
  2. A press according to claim 1, characterised in that the cylinder-and-piston arrangements (13) are coupled in longitudinal rows and optionally in transverse rows to the upper and/or lower feed platen (8, 9) and the feed platens (8, 9) comprise channels (18), which extend in the longitudinal direction of the platens, for the heating medium.
  3. A press according to claim 1 or 2, characterised in that the cylinder-and-piston arrangements (13) are coupled via universal joints to the upper and/or lower feed platen (8, 9) and to the press upper part (4) and/or press lower part (3), and that the cylinder-and-piston arrangements (13) are coupled to the upper and/or lower feed platen (8, 9) with thermal insulation units (20) interposed therebetween.
  4. A press according to any one of claims 1 to 3, characterised in that the hydraulic supply to the cylinder-and-piston arrangements (13) is effected with a cooling device comprising a heat exchanger interposed therebetween.
EP98117030A 1997-09-13 1998-09-09 Continuous press for pressing mats into boards Expired - Lifetime EP0909620B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19740325 1997-09-13
DE19740325A DE19740325C5 (en) 1997-09-13 1997-09-13 Continuous press for pressing pressed material mats to press plates
DE19829742A DE19829742C1 (en) 1998-07-03 1998-07-03 Continuos pressing process for chip or fiber board
DE19829741A DE19829741C1 (en) 1998-07-03 1998-07-03 Continuos pressing process for chip or fiber board
DE19829741 1998-07-03
DE19829742 1998-07-03

Publications (3)

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EP0909620A2 EP0909620A2 (en) 1999-04-21
EP0909620A3 EP0909620A3 (en) 1999-05-19
EP0909620B1 true EP0909620B1 (en) 2003-11-19

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EP03020741A Expired - Lifetime EP1371466B1 (en) 1997-09-13 1998-09-09 Press for continuous pressing
EP98117030A Expired - Lifetime EP0909620B1 (en) 1997-09-13 1998-09-09 Continuous press for pressing mats into boards
EP98117029A Expired - Lifetime EP0901894B1 (en) 1997-09-13 1998-09-09 Process and press for pressing, particularly for continuous pressing

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EP03020741A Expired - Lifetime EP1371466B1 (en) 1997-09-13 1998-09-09 Press for continuous pressing

Family Applications After (1)

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EP98117029A Expired - Lifetime EP0901894B1 (en) 1997-09-13 1998-09-09 Process and press for pressing, particularly for continuous pressing

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US (2) US6098532A (en)
EP (3) EP1371466B1 (en)
CN (2) CN1188259C (en)
CA (2) CA2244284C (en)
DE (2) DE59810212D1 (en)

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Also Published As

Publication number Publication date
US6142068A (en) 2000-11-07
EP0909620A2 (en) 1999-04-21
DE59810212D1 (en) 2003-12-24
EP0901894B1 (en) 2004-11-24
CA2244283C (en) 2003-07-29
DE59812293D1 (en) 2004-12-30
CA2244284A1 (en) 1999-03-13
EP0901894A2 (en) 1999-03-17
CN1076258C (en) 2001-12-19
EP1371466A1 (en) 2003-12-17
US6098532A (en) 2000-08-08
CN1224650A (en) 1999-08-04
CA2244283A1 (en) 1999-03-13
CN1188259C (en) 2005-02-09
CN1224651A (en) 1999-08-04
CA2244284C (en) 2002-05-28
EP0909620A3 (en) 1999-05-19
EP0901894A3 (en) 1999-05-12
EP1371466B1 (en) 2011-06-29

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