EP0166886B1 - Press for exerting a pressure on an area of continuously moving work pieces - Google Patents

Press for exerting a pressure on an area of continuously moving work pieces Download PDF

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Publication number
EP0166886B1
EP0166886B1 EP85104812A EP85104812A EP0166886B1 EP 0166886 B1 EP0166886 B1 EP 0166886B1 EP 85104812 A EP85104812 A EP 85104812A EP 85104812 A EP85104812 A EP 85104812A EP 0166886 B1 EP0166886 B1 EP 0166886B1
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EP
European Patent Office
Prior art keywords
lubricating
pressure
seal
pressing belt
nozzles
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
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EP85104812A
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German (de)
French (fr)
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EP0166886A1 (en
Inventor
Theodor Hymmen Firma
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Individual
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Individual
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Priority to AT85104812T priority Critical patent/ATE30128T1/en
Publication of EP0166886A1 publication Critical patent/EP0166886A1/en
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Publication of EP0166886B1 publication Critical patent/EP0166886B1/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
    • B30B5/062—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 urged by directly-acting fluid pressure
    • 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 applying surface pressure to progressive workpieces, such as wood-based panels or the like, in which at least one rotating press belt can be pressed against the workpiece by a pressure medium that can be introduced into a pressure chamber, and the pressure chamber can be pressed through part of a strand of the press belt.
  • a pressure medium that can be introduced into a pressure chamber
  • the pressure chamber can be pressed through part of a strand of the press belt.
  • lubricating oil is supplied in the vicinity of the seal, which is then transported from the press belt to the seals, so that an oil film forms in the area of the surface of the seal supported on the press belt.
  • the previously known devices have the disadvantage that the contact surface between the press belt and the seal is only lubricated very unevenly. At the points where there is a greater distance between the seal and the press belt, more oil is fed in than at the points with a small distance.
  • the known devices have the disadvantage that when the oil is fed into the pressure pad, swirling or intensive mixing of oil with oxygen takes place. This leads to oxidation and thus premature aging of the lubricating oil.
  • the invention has for its object to design a device of the type mentioned so that the lubrication at the friction point between the seal and the press belt is significantly improved.
  • the seal is provided with one or more lubrication nozzles or with one or more channels guiding the lubricant and in the surface of the seal which is supported on the press belt, an outlet opening or a plurality of outlet openings for the lubricants are arranged .
  • the thickness of the lubricant film between the seal and the press belt can be precisely adjusted by pressurizing the lubricant so that this lubricant film functions as a lubricant to reduce friction the seal on the press belt and as a sealant to prevent air from escaping from the pressure chamber.
  • the subject of the invention reduces the abrasion of the seal and overheating under the seal is avoided.
  • the device 1 has a lower frame 2 and an upper frame 3, in each of which endless press belts 4 are installed.
  • the press belts 4 run around deflection rollers 5 and are driven by them. They are arranged with respect to one another with a gap which corresponds to the width of a workpiece 6 to be machined. While the press belts 4 carry out a horizontal movement with their surfaces touching the workpiece 6, the workpiece 6 is drawn into the device, specifically into the gap that exists between the surfaces, and is pressurized there by the surfaces of the press belts. When the workpiece 6 passes through the device, it is processed so that it leaves the gap between the press belts 4 as a finished workpiece.
  • foils 7 are pressed onto the top and bottom of the workpiece 6 and are pulled off from supply rolls B.
  • the pressing process can take place at room temperature or at higher temperatures which are applied to the workpiece in the machining area.
  • the upper frame 3 can be pressed as a whole against the lower frame 2 and, after a rough adjustment of the distance between the upper frame 3 and the lower frame 2, the required pressure can be exerted by means of an air pressure built up in pressure chambers 9 , which are each arranged on the back of the press belt 4 with respect to the workpiece 6.
  • guide slides 10 are provided for the rough adjustment, which are fixedly arranged on the lower frame 2 and on which the upper frame 3 can be displaced in the vertical direction.
  • Hydraulic cylinders 11 are provided for the displacement.
  • the pressure chambers 9 are delimited on the side facing away from the working side of the press belt by pressure plates 12 which are guided relative to the frames 2 and 3 and the movement of which is carried out by hydraulic cylinders 13.
  • the pressure plate 12 can be rotated according to the illustration in FIG. 1 about an axis 14 running perpendicular to the working line of the press belt 4, so that in the case of a rectangular design with different side lengths, the pressure chamber width can be adjusted to different workpiece widths.
  • a pressure medium can be introduced into the pressure chamber 9 through the pressure plate 12 via openings 15.
  • the pressure plate 12 has, on its side facing the working side of the press belt 4, a circumferential groove 16, in which, according to the exemplary embodiment according to FIG. 3, a tube 17 with a round cross section is arranged.
  • This hose is made of rubber or plastic.
  • the boundary of the groove 16 corresponds to the contour of the round hose.
  • the height H of the groove corresponds to approximately 2/3 of the outside diameter of the hose 17.
  • the hose is supported on the press belt 4 with the end protruding from the groove 16.
  • the hose is provided with a sealing strip 18 which is integral with the hose.
  • Lubricating nozzles 19, which are arranged at a distance from one another and to which the lubricating oil is supplied from the interior 20 of the hose, are provided in the sealing strip.
  • the interior 20 of the hose 17 is largely filled with lubricating oil.
  • This lubricating oil is supplied through a channel 21 to the interior of the hose.
  • the filling opening of the channel 21 is closed by a screw 22.
  • a line 23 opens into the channel 21, through which compressed air, which is introduced through a connecting piece 24, is introduced both into the lubricating oil-free space of the interior 20 and into the pressure chamber 9.
  • the lubricating oil located in the interior 20 of the hose is thus pressurized and pressed by the lubricating nozzles 19 onto the friction surfaces between the sealing strip 18 and the press belt 4 and forms an oil film in this area.
  • the wear on the sealing strip is reduced by this and a gas-tight seal of the pressure chamber 9 is also achieved.
  • the pressure plate 12 has a circumferential groove 25 which is closed by a membrane 26 on the side facing the press belt 4.
  • a socket 30 is fastened by means of screws 29.
  • the socket has a circumferential groove in which a strip-shaped sealing profile 31 with a rectangular cross section is fixed.
  • Lubricating nozzles 32 are provided at a distance from one another in this sealing profile. The lubricating oil is supplied to these lubricating nozzles through a channel 33 and through a nipple 34 screwed into the channel.
  • the groove bounded at the bottom by the membrane 26 is partially filled with lubricating oil.
  • the lubricating oil-free space of the groove is pressurized with compressed air, which is supplied through the channel 35 and reaches the pressure chamber 9 via the branch channel 36.
  • Each lubricating nozzle 19, 32 has on the side facing the press belt 4 an outlet opening 37, which in the exemplary embodiment according to FIG. 5 has a round cross section.
  • these outlet openings can also be designed as wide slots 38.
  • the lubricating nozzles 19, 32 can be arranged at a distance of 100 to 200 mm.
  • the sealing profiles 31 are provided with lubricating nozzles 39 which open into a distributor groove 40.
  • This distributor groove 40 extends over the entire length of the sealing profile 31.
  • the lubricating nozzles 32 arranged in the strip-shaped sealing profile 31 are acted upon by a system with lubricant which is independent of the pressure medium present in the pressure chamber 9.
  • the lubricant e.g. Lubricating oil is supplied through a line 41, which passes through a bore 43 in the strip 42, the inside diameter of which is larger than the outside diameter of the line 41. This makes it possible for the line 41 to follow the movement of the socket 30 or the sealing strip 31 can, which occurs due to the pressurization of the rubber-elastic membrane 26.
  • the chamber 44 is pressurized together with the pressure chamber 9 with compressed air, which is supplied through a channel 45.
  • the sealing strip 45 is equipped with channels 47 which carry the lubricant and which are arranged at a distance from one another along the sealing strip.
  • the sealing strip is anchored in a socket 48, on the upper boundary surface 49 of which a rigid tube 50 is supported, which is provided with a plastic casing 51.
  • the lubricating oil is passed to the individual channels 47, which are connected to the interior of the tube 50 by lines 52.
  • the plastic jacket 53 of the tube 50 forms a seal for the chamber 53, which is pressurized with compressed air via a line 54 together with the pressure chamber 9.

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  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Press Drives And Press Lines (AREA)
  • Coating Apparatus (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Peptides Or Proteins (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Spray Control Apparatus (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

An arrangement for applying a surface pressure upon movable workpieces, has a rotatable pressing band with a working run applying a pressure against the workpiece, a pressure chamber formed by a part of the working run, a pressing plate, and a sealing member arranged on an edge of the pressing plate, and a lubricant supplying system including at least one lubricating nozzle formed in the sealing member and at least one lubricant discharge opening provided in the sealing member with its surface abutting against the pressing band.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Aufbringen einer Flächenpressung auf fortschreitende Werkstücke, wie Holzwerkstoffplatten od. dgl., bei der mindestens ein umlaufendes Pressband an das Werkstück von einem in eine Druckkammer einleitbaren Druckmittel anpressbar und die Druckkammer durch einen Teil eines Trums des Pressbandes, an der dem Trum gegenüberliegenden Seite durch eine rechteckförmige Druckplatte und an den in bezug auf die Laufrichtung des Pressbandes Längs- und Querrändern der Druckplatte durch eine am Rand der Druckplatte vorgesehene, sich am Pressband abstützende Dichtung begrenzt ist.The invention relates to a device for applying surface pressure to progressive workpieces, such as wood-based panels or the like, in which at least one rotating press belt can be pressed against the workpiece by a pressure medium that can be introduced into a pressure chamber, and the pressure chamber can be pressed through part of a strand of the press belt. on the side opposite the run by a rectangular pressure plate and on the longitudinal and transverse edges of the pressure plate with respect to the running direction of the press belt is delimited by a seal provided on the edge of the pressure plate and supported on the press belt.

Bei den bekannten Vorrichtungen dieser Art wird in der Nähe der Dichtung Schmieröl zugeführt, das dann von dem Pressband zu den Dichtungen transportiert wird, so dass sich im Bereich der sich am Pressband abstützenden Fläche der Dichtung ein Ölfilm ausbildet.In the known devices of this type, lubricating oil is supplied in the vicinity of the seal, which is then transported from the press belt to the seals, so that an oil film forms in the area of the surface of the seal supported on the press belt.

Die bisher bekannten Vorrichtungen haben den Nachteil, dass die Berührungsfläche zwischen Pressband und Dichtung nur sehr ungleichmässig geschmiert wird. An den Stellen, an denen ein grösserer Abstand zwischen Dichtung und Pressband gegeben ist, wird mehr Öl zugeführt als an den Stellen eines geringen Abstandes. Ausserdem haben die bekannten Vorrichtungen den Nachteil, dass bei der Zuführung des Öles in das Druckkissen eine Verwirbelung oder intensive Vermischung von Öl mit Sauerstoff stattfindet. Dies führt zur Oxydation und damit zur vorzeitigen Alterung des Schmieröles.The previously known devices have the disadvantage that the contact surface between the press belt and the seal is only lubricated very unevenly. At the points where there is a greater distance between the seal and the press belt, more oil is fed in than at the points with a small distance. In addition, the known devices have the disadvantage that when the oil is fed into the pressure pad, swirling or intensive mixing of oil with oxygen takes place. This leads to oxidation and thus premature aging of the lubricating oil.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so zu gestalten, dass die Schmierung an der Reibstelle zwischen der Dichtung und dem Pressband wesentlich verbessert wird.The invention has for its object to design a device of the type mentioned so that the lubrication at the friction point between the seal and the press belt is significantly improved.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, dass die Dichtung mit einer oder mit mehreren Schmierdüsen oder mit einem oder mehreren das Schmiermittel führenden Kanälen versehen ist und in der sich an dem Pressband abstützenden Fläche der Dichtung eine Austrittsöffnung oder mehrere Austrittsöffnungen für die Schmiermittel angeordnet sind.This object is achieved according to the invention in that the seal is provided with one or more lubrication nozzles or with one or more channels guiding the lubricant and in the surface of the seal which is supported on the press belt, an outlet opening or a plurality of outlet openings for the lubricants are arranged .

Dadurch, dass die Schmierflüssigkeit unmittelbar an der Reibstelle zwischen der Dichtung und dem Pressband zugeführt wird, kann durch eine entsprechende Druckbeaufschlagung der Schmierflüssigkeit die Dicke des Schmierflüssigkeitsfilmes zwischen der Dichtung und dem Pressband exakt eingestellt werden, damit dieser Schmierflüssigkeitsfilm seine Aufgaben als Schmiermittel zur Verrringerung der Reibung der Dichtung auf dem Pressband und als Abdichtmittel gegen ein Entweichen der Luft aus der Druckkammer optimal erfüllt.Because the lubricant is supplied directly at the point of friction between the seal and the press belt, the thickness of the lubricant film between the seal and the press belt can be precisely adjusted by pressurizing the lubricant so that this lubricant film functions as a lubricant to reduce friction the seal on the press belt and as a sealant to prevent air from escaping from the pressure chamber.

Es besteht die Möglichkeit, als Druckmittel für die Schmierflüssigkeit die Druckluft zu verwenden, mit der auch die Druckkammer beaufschlagt wird oder aber die in der Dichtung vorgesehenen Schmierdüsen aus einem separaten Schmiermittelkreislauf zu speisen.It is possible to use the compressed air with which the pressure chamber is also acted on as the pressure medium for the lubricant or to feed the lubrication nozzles provided in the seal from a separate lubricant circuit.

Durch den Gegenstand der Erfindung wird der Abrieb der Dichtung vermindert und es werden Überhitzungen unter der Dichtung vermieden.The subject of the invention reduces the abrasion of the seal and overheating under the seal is avoided.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden beschrieben. Es zeigen:

  • Fig. 1 eine um eine mittlere Achse drehbare Druckplatte von der Seite des Pressbandes aus gesehen,
  • Fig. 2 eine Seitenansicht der Vorrichtung mit einem oberen und einem unteren Pressband,
  • Fig. 3 einen Schnitt nach der Linie 111-111 in Fig. 1,
  • Fig. 4 eine Abwandlungsform zu der Ausführung nach der Fig. 3,
  • Fig. 5 eine Ansicht der leistenförmigen Dichtung in Richtung des Pfeiles V in Fig. 4.
  • Fig. 6 und 7 Abwandlungsformen zu der Ausführung nach der Fig. 5 und
  • Fig. 8 einen Schnitt nach der Linie VIII-VIII in Fig. 7 und
  • Fig. 9 und 10 Ausführungsbeispiele im Schnitt, bei denen ein separater Schmiermittelkreislauf vorhanden ist.
Embodiments of the invention are shown in the drawings and are described below. Show it:
  • 1 is seen a pressure plate rotatable about a central axis from the side of the press belt,
  • 2 is a side view of the device with an upper and a lower press belt,
  • 3 shows a section along the line 111-111 in FIG. 1,
  • 4 shows a modification to the embodiment according to FIG. 3,
  • 5 is a view of the strip-shaped seal in the direction of arrow V in FIG. 4th
  • 6 and 7 modification forms to the embodiment of FIGS. 5 and
  • Fig. 8 is a section along the line VIII-VIII in Fig. 7 and
  • 9 and 10 embodiments in section, in which a separate lubricant circuit is present.

Die Vorrichtung 1 weist einen unteren Rahmen 2 und einen oberen Rahmen 3 auf, in die jeweils endlose Pressbänder 4 eingebaut sind. Die Pressbänder 4 umlaufen Umlenkrollen 5 und werden von diesen angetrieben. Sie sind mit einem Spalt zueinander angeordnet, der der Breite eines zu bearbeitenden Werkstückes 6 entspricht. Während die Pressbänder 4 mit ihren das Werkstück 6 berührenden Oberflächen eine waagerechte Bewegung ausführen, wird das Werkstück 6 in die Vorrichtung, und zwar in den Spalt, der zwischen den Oberflächen besteht, hineingezogen und dort von den Oberflächen der Pressbänder mit Druck beaufschlagt. Beim Durchlauf des Werkstückes 6 durch die Vorrichtung erfolgt somit seine Bearbeitung, so dass es als fertig bearbeitetes Werkstück den Spalt zwischen den Pressbändern 4 verlässt.The device 1 has a lower frame 2 and an upper frame 3, in each of which endless press belts 4 are installed. The press belts 4 run around deflection rollers 5 and are driven by them. They are arranged with respect to one another with a gap which corresponds to the width of a workpiece 6 to be machined. While the press belts 4 carry out a horizontal movement with their surfaces touching the workpiece 6, the workpiece 6 is drawn into the device, specifically into the gap that exists between the surfaces, and is pressurized there by the surfaces of the press belts. When the workpiece 6 passes through the device, it is processed so that it leaves the gap between the press belts 4 as a finished workpiece.

In dem in der Fig. 2 dargestellten Ausführungsbeispiel werden auf die Ober- und Unterseite des Werkstückes 6 Folien 7 aufgepresst, die von Vorratsrollen B abgezogen werden. Der Pressvorgang kann bei Raumtemperatur oder bei höheren Temperaturen erfolgen, die auf das Werkstück im Bearbeitungsbereich aufgebracht werden. Zur Erzeugung des gewünschten Druckes kann der obere Rahmen 3 insgesamt gegen den unteren Rahmen 2 gepresst werden und es kann nach einer Grobeinstellung des Abstandes zwischen dem oberen Rahmen 3 und dem unteren Rahmen 2 der erforderliche Druck mittels eines Luftdruckes ausgeübt werden, der in Druckkammern 9 aufgebaut wird, die jeweils an der Rückseite des Pressbandes 4 in bezug auf das Werkstück 6 angeordnet sind.In the exemplary embodiment shown in FIG. 2, foils 7 are pressed onto the top and bottom of the workpiece 6 and are pulled off from supply rolls B. The pressing process can take place at room temperature or at higher temperatures which are applied to the workpiece in the machining area. To generate the desired pressure, the upper frame 3 can be pressed as a whole against the lower frame 2 and, after a rough adjustment of the distance between the upper frame 3 and the lower frame 2, the required pressure can be exerted by means of an air pressure built up in pressure chambers 9 , which are each arranged on the back of the press belt 4 with respect to the workpiece 6.

Im dargestellten Ausführungsbeispiel sind für die Grobeinstellung Führungsschlitten 10 vorgesehen, die an dem unteren Rahmen 2 fest angeordnet sind und an denen der obere Rahmen 3 in senkrechter Richtung verschiebbar ist. Für die Verschiebung sind Hydraulikzylinder 11 vorgesehen. Die Druckkammern 9 werden an der dem Arbeitstrum des Pressbandes abgewandten Seite durch Druckplatten 12 begrenzt, die gegenüber den Rahmen 2 und 3 geführt sind und deren Bewegung durch Hydraulikzylinder 13 vorgenommen wird.In the exemplary embodiment shown, guide slides 10 are provided for the rough adjustment, which are fixedly arranged on the lower frame 2 and on which the upper frame 3 can be displaced in the vertical direction. Hydraulic cylinders 11 are provided for the displacement. The pressure chambers 9 are delimited on the side facing away from the working side of the press belt by pressure plates 12 which are guided relative to the frames 2 and 3 and the movement of which is carried out by hydraulic cylinders 13.

DrDr

Die Druckplatte 12 ist nach der Darstellung in der Fig. 1 um eine senkrecht zum Arbeitstrum des Pressbandes 4 verlaufende Achse 14 drehbar, so dass bei einer rechteckigen Ausbildung mit unterschiedlichen Seitenlängen eine Einstellung der Druckkammerbreite auf verschiedene Werkstücksbreiten erfolgen kann. Über Öffnungen 15 kann ein Druckmittel durch die Druckplatte 12 in die Druckkammer 9 eingeführt werden.The pressure plate 12 can be rotated according to the illustration in FIG. 1 about an axis 14 running perpendicular to the working line of the press belt 4, so that in the case of a rectangular design with different side lengths, the pressure chamber width can be adjusted to different workpiece widths. A pressure medium can be introduced into the pressure chamber 9 through the pressure plate 12 via openings 15.

Die Druckplatte 12 weist an ihrer dem Arbeitstrum des Pressbandes 4 zugewandten Seite umlaufende Nut 16 auf, in der nach dem Ausführungsbeispiel nach der Fig. 3 ein im Querschnitt runder Schlauch 17 angeordnet ist. Dieser Schlauch ist aus Gummi oder Kunststoff gefertigt. Die Begrenzung der Nut 16 entspricht der Kontur des runden Schlauches. Die Höhe H der Nut entspricht etwa 2/3 des Aussendurchmessers des Schlauches 17. Der Schlauch stützt sich mit dem aus der Nut 16 herausragenden Ende am Pressband 4 ab.The pressure plate 12 has, on its side facing the working side of the press belt 4, a circumferential groove 16, in which, according to the exemplary embodiment according to FIG. 3, a tube 17 with a round cross section is arranged. This hose is made of rubber or plastic. The boundary of the groove 16 corresponds to the contour of the round hose. The height H of the groove corresponds to approximately 2/3 of the outside diameter of the hose 17. The hose is supported on the press belt 4 with the end protruding from the groove 16.

Der Schlauch ist mit einer Dichtungsleiste 18 versehen, die mit dem Schlauch einstückig ist. In der Dichtungsleiste sind in Abstand voneinander angeordnete Schmierdüsen 19 vorgesehen, denen das Schmieröl aus dem Innenraum 20 des Schlauches zugeführt wird.The hose is provided with a sealing strip 18 which is integral with the hose. Lubricating nozzles 19, which are arranged at a distance from one another and to which the lubricating oil is supplied from the interior 20 of the hose, are provided in the sealing strip.

In dem in der Fig. 3 aufgezeigten Ausführungsbeispiel ist der Innenraum 20 des Schlauches 17 zum grössten Teil mit Schmieröl gefüllt. Dieses Schmieröl wird durch einen Kanal 21 dem Innenraum des Schlauches zugeführt. Die Einfüllöffnung des Kanals 21 wird durch eine Schraube 22 verschlossen. In den Kanal 21 mündet eine Leitung 23 ein, durch die Druckluft, die durch einen Stutzen 24 eingeführt wird, sowohl in den schmierölfreien Raum des Innenraumes 20 als auch in die Druckkammer 9 eingeleitet wird. Das im Innenraum 20 des Schlauches befindliche Schmieröl wird somit druckbeaufschlagt und durch die Schmierdüsen 19 auf die Reibflächen zwischen der Dichtungsleiste 18 und dem Pressband 4 gedrückt und bildet in diesem Bereich einen Ölfilm. Durch diesen wird die Abnutzung der Dichtungsleiste herabgesetzt und auch eine gasdichte Abdichtung der Druckkammer 9 erreicht.In the embodiment shown in FIG. 3, the interior 20 of the hose 17 is largely filled with lubricating oil. This lubricating oil is supplied through a channel 21 to the interior of the hose. The filling opening of the channel 21 is closed by a screw 22. A line 23 opens into the channel 21, through which compressed air, which is introduced through a connecting piece 24, is introduced both into the lubricating oil-free space of the interior 20 and into the pressure chamber 9. The lubricating oil located in the interior 20 of the hose is thus pressurized and pressed by the lubricating nozzles 19 onto the friction surfaces between the sealing strip 18 and the press belt 4 and forms an oil film in this area. The wear on the sealing strip is reduced by this and a gas-tight seal of the pressure chamber 9 is also achieved.

Bei dem Ausführungsbeispiel nach der Fig. 4 weist die Druckplatte 12 eine umlaufende Nut 25 auf, die zu der dem Pressband 4 zugewandten Seite durch eine Membran 26 verschlossen wird. An dieser Membran 26, die eine gummielastische Dichtung bildet, und die mittels Schrauben 27 und Leisten 28 an der Druckplatte 12 gas- und flüssigkeitsdicht festgelegt ist, ist mittels Schrauben 29 eine Fassung 30 befestigt. Die Fassung weist eine umlaufende Nut auf, in der ein im Querschnitt rechteckiges, leistenförmiges Dichtungsprofil 31 festgelegt ist. In diesem Dichtungsprofil sind in Abstand voneinander Schmierdüsen 32 vorgesehen. Diesen Schmierdüsen wird das Schmieröl jeweils durch einen Kanal 33 und durch einen in den Kanal eingeschraubten Nippel 34 zugeführt. Die nach unten durch die Membran 26 begrenzte Nut ist teilweise mit Schmieröl gefüllt. Der schmierölfreie Raum der Nut wird mit Druckluft beaufschlagt, die durch den Kanal 35 zugeführt wird und über den Zweigkanal 36 in die Druckkammer 9 gelangt.In the exemplary embodiment according to FIG. 4, the pressure plate 12 has a circumferential groove 25 which is closed by a membrane 26 on the side facing the press belt 4. On this membrane 26, which forms a rubber-elastic seal and which is fixed gas and liquid-tight on the pressure plate 12 by means of screws 27 and strips 28, a socket 30 is fastened by means of screws 29. The socket has a circumferential groove in which a strip-shaped sealing profile 31 with a rectangular cross section is fixed. Lubricating nozzles 32 are provided at a distance from one another in this sealing profile. The lubricating oil is supplied to these lubricating nozzles through a channel 33 and through a nipple 34 screwed into the channel. The groove bounded at the bottom by the membrane 26 is partially filled with lubricating oil. The lubricating oil-free space of the groove is pressurized with compressed air, which is supplied through the channel 35 and reaches the pressure chamber 9 via the branch channel 36.

Jede Schmierdüse 19, 32 weist an der dem Pressband 4 zugewandten Seite eine Austrittsöffnung 37 auf, die in dem Ausführungsbeispiel nach der Fig. 5 einen runden Querschnitt aufweist.Each lubricating nozzle 19, 32 has on the side facing the press belt 4 an outlet opening 37, which in the exemplary embodiment according to FIG. 5 has a round cross section.

Diese Austrittsöffnungen können aber auch, wie dies in der Fig. 6 aufgezeigt ist, als Breitschlitze 38 ausgebildet sein.However, as shown in FIG. 6, these outlet openings can also be designed as wide slots 38.

Die Schmierdüsen 19, 32 können in einem Abstand von 100 bis 200 mm angeordnet sein.The lubricating nozzles 19, 32 can be arranged at a distance of 100 to 200 mm.

Bei dem Ausführungsbeispiel nach der Fig. 7 sind die Dichtungsprofile 31 mit Schmierdüsen 39 versehen, die in eine Verteilernut 40 einmünden. Diese Verteilernut 40 erstreckt sich über die gesamte Länge des Dichtungsprofils 31.In the exemplary embodiment according to FIG. 7, the sealing profiles 31 are provided with lubricating nozzles 39 which open into a distributor groove 40. This distributor groove 40 extends over the entire length of the sealing profile 31.

Bei dem Ausführungsbeispiel nach der Fig. 9 werden die in dem leistenförmigen Dichtungsprofil 31 angeordneten Schmierdüsen 32 durch ein System mit Schmiermittel beaufschlagt, das von der in der Druckkammer 9 vorhandenen Druckmittel unabhängig ist.In the exemplary embodiment according to FIG. 9, the lubricating nozzles 32 arranged in the strip-shaped sealing profile 31 are acted upon by a system with lubricant which is independent of the pressure medium present in the pressure chamber 9.

Das Schmiermittel, z.B. Schmieröl, wird durch eine Leitung 41 zugeführt, die in der Leiste 42 eine Bohrung 43 durchtritt, deren Innendurchmesser grösser ist als der Aussendurchmesser der Leitung 41. Hierdurch besteht die Möglichkeit, dass die Leitung 41 der Bewegung der Fassung 30 bzw. der Dichtungsleiste 31 folgen kann, die durch die Druckbeaufschlagung der gummielastischen Membran 26 auftritt. Die Kammer 44 wird zusammen mit der Druckkammer 9 mit Druckluft beaufschlagt, die durch einen Kanal 45 zugeführt wird.The lubricant, e.g. Lubricating oil is supplied through a line 41, which passes through a bore 43 in the strip 42, the inside diameter of which is larger than the outside diameter of the line 41. This makes it possible for the line 41 to follow the movement of the socket 30 or the sealing strip 31 can, which occurs due to the pressurization of the rubber-elastic membrane 26. The chamber 44 is pressurized together with the pressure chamber 9 with compressed air, which is supplied through a channel 45.

Bei dem Ausführungsbeispiel nach der Fig. 10 ist die Dichtungsleiste 45 mit das Schmiermittel führenden Kanälen 47 ausgerüstet, die längs der Dichtungsleiste in Abstand voneinander angeordnet sind. Die Dichtungsleiste wird in einer Fassung 48 verankert, an deren oberen Begrenzungsfläche 49 sich ein starres Rohr 50 abstützt, das mit einer Kunststoffummantelung 51 versehen ist. Durch dieses Rohr 50 wird das Schmieröl zu den einzelnen Kanälen 47 geleitet, die mit dem Innenraum des Rohres 50 durch Leitungen 52 verbunden sind. Der Kunststoffmantel 53 des Rohres 50 bildet eine Abdichtung der Kammer 53, die über eine Leitung 54 zusammen mit der Druckkammer 9 mit Druckluft beaufschlagt wird.In the exemplary embodiment according to FIG. 10, the sealing strip 45 is equipped with channels 47 which carry the lubricant and which are arranged at a distance from one another along the sealing strip. The sealing strip is anchored in a socket 48, on the upper boundary surface 49 of which a rigid tube 50 is supported, which is provided with a plastic casing 51. Through this tube 50, the lubricating oil is passed to the individual channels 47, which are connected to the interior of the tube 50 by lines 52. The plastic jacket 53 of the tube 50 forms a seal for the chamber 53, which is pressurized with compressed air via a line 54 together with the pressure chamber 9.

Figure imgb0001
Figure imgb0001
Figure imgb0002
Figure imgb0002

Claims (9)

1. Apparatus for applying a surface pressure to advancing workpieces such as wood material panels or the like wherein at least one circulating pressing belt can be pressed against the workpiece by a pressure agent which can be introduced into a pressure chamber, and the pressure chamber is delimited by a part of a run of the pressing belt, at the side which is in opposite relationship to the run by a rectangular pressure plate and at the edges of the pressure plate which are the longitudinal and transverse edges in relation to the direction of movement of the pressing belt, by a seal which is provided at the edge of the pressure plate and which bears against the pressing belt, characterised in that the seal is provided with one or more lubricating nozzles (19, 32, 39) or one or more passages for carrying the lubricating agent, and an outlet opening or a plurality of outlet openings (37) for the lubricating fluid are arranged in the surface of the seal which bears against the pressing belt (4).
2. Apparatus according to claim 1 comprising a seal in the form of a tube arranged in a groove which is open towards the pressing belt side and which is of a configuration corresponding to the outside contour of the tube, characterised in that the lubricating fluid is provided in the interior (20) of the tube (17) and the tube has the row of outlet openings (37) for the lubricating agent, in its region which bears against the pressing belt (4).
3. Apparatus according to claim 1 having a seal comprising strip-shaped sealing members, characterised in that the sealing members (31) are provided with spaced-apart lubricating nozzles (32).
4. Apparatus according to claim 3, characterised in that the sealing members (31) are fixed to a diaphragm, the lubricating nozzles (32) extend through the diaphragm and the chamber delimited by the diaphragm is partially or completely filled with the lubricating fluid.
5. Apparatus according to one of the preceding claims, characterised in that the lubricating nozzles (19, 32, 39) have round oulet openings (37) or outlet openings which are in the form of wide slots.
6. Apparatus according to one of claims 1 to 5, characterised in that the lubricating nozzles are arranged at a spacing of 100 to 200 mm. °
7. Apparatus according to claim 1, characterised in that the sealing members (31) are provided at the side towards the pressing belt (4) with a distributor groove (40) into which the lubricating nozzles (39) open.
8. Apparatus according to one of claims 1 to 7, characterised in that the lubricating fluid is acted upon by compressed air.
9. Apparatus according to claim 1, characterised in that the lubricating nozzles (19, 32, 39) or the passages (41, Figure 9; 50, Figure 10) carrying the lubricating agent are fed from a separate lubricating agent system.
EP85104812A 1984-07-04 1985-04-20 Press for exerting a pressure on an area of continuously moving work pieces Expired EP0166886B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104812T ATE30128T1 (en) 1984-07-04 1985-04-20 DEVICE FOR APPLYING A SURFACE PRESSURE TO PROGRESSIVE WORKPIECES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843424599 DE3424599A1 (en) 1984-07-04 1984-07-04 DEVICE FOR APPLYING A SURFACE PRESS TO PROGRESSIVE WORKPIECES
DE3424599 1984-07-04

Publications (2)

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EP0166886A1 EP0166886A1 (en) 1986-01-08
EP0166886B1 true EP0166886B1 (en) 1987-10-07

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US (1) US4632722A (en)
EP (1) EP0166886B1 (en)
JP (1) JPS6131201A (en)
AT (1) ATE30128T1 (en)
DE (1) DE3424599A1 (en)
ES (1) ES295851Y (en)
FI (1) FI82630C (en)
IN (1) IN165551B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255596A1 (en) * 1986-08-05 1988-02-10 Mitsubishi Rayon Engineering Co., Ltd. Continuous press machine
FR2602693A1 (en) * 1986-08-18 1988-02-19 Andritz Ag Maschf MACHINE FOR PRESSING AND EXTRACTING MOISTURE, ESPECIALLY FOR FILTRATION
EP0507085A2 (en) * 1991-04-05 1992-10-07 Firma Theodor Hymmen Apparatus for exerting surface pressure on continuously advancing material
USRE35091E (en) * 1986-08-18 1995-11-21 Mascheninfabrik Andritz Actiengesellschaft Pressure device and seal for filter belt machines

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385681B (en) * 1986-08-18 1988-05-10 Andritz Ag Maschf PRINTING DEVICE FOR MACHINES OR PROVIDED MACHINE FOR DRAINING OR FILTER OR FOR PRESSED GOODS
DK0491972T3 (en) * 1990-12-21 1994-11-21 Baehre & Greten Continuous belt press
DE9111712U1 (en) * 1991-09-19 1991-11-14 Fa. Theodor Hymmen, 4800 Bielefeld Device for applying a surface pressure to advancing workpieces
FI1263U1 (en) * 1993-09-10 1994-03-18 Enfoplan Oy Anordning Foer taetning av ett genomfoeringsorgan
DE19944022C2 (en) * 1999-09-15 2003-07-24 Thomas Biermann Continuously working press
US6658999B1 (en) 1999-10-15 2003-12-09 The Minster Machine Company Linear inflatable press guide seal
US6318727B1 (en) * 1999-11-05 2001-11-20 Kimberly-Clark Worldwide, Inc. Apparatus for maintaining a fluid seal with a moving substrate
CN105423108B (en) * 2016-01-19 2018-01-19 吉林森林工业股份有限公司江苏分公司 A kind of hot press gauze pad lubricating arrangement and application method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981307A (en) * 1957-06-24 1961-04-25 Jr Neil Malarkey Press machine
US3748225A (en) * 1970-11-19 1973-07-24 Beloit Corp Fibrous web press nip structure including nonporous belts backed by pistons supported with fluid pressure
US3839147A (en) * 1973-03-22 1974-10-01 Beloit Corp Fibrous web press nip structure including nonporous belts backed by fluid pressure chambers having flexible sills
DE2937971A1 (en) * 1979-09-20 1981-04-02 Theodor Hymmen Kg, 4800 Bielefeld DEVICE FOR APPLYING A SURFACE PRESS TO PROGRESSIVE WORKPIECES
DE2937972C2 (en) * 1979-09-20 1987-05-07 Theodor Hymmen Kg, 4800 Bielefeld Device for applying a surface pressure to advancing workpieces
EP0087651B2 (en) * 1982-02-27 1994-06-08 Kurt Held Apparatus to support pressure bands in a roll-supported double band press
DE3310700A1 (en) * 1983-03-24 1984-09-27 Theodor Hymmen Kg, 4800 Bielefeld DEVICE FOR APPLYING A SURFACE PRESS TO PROGRESSIVE WORKPIECES

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255596A1 (en) * 1986-08-05 1988-02-10 Mitsubishi Rayon Engineering Co., Ltd. Continuous press machine
FR2602693A1 (en) * 1986-08-18 1988-02-19 Andritz Ag Maschf MACHINE FOR PRESSING AND EXTRACTING MOISTURE, ESPECIALLY FOR FILTRATION
BE1000809A4 (en) * 1986-08-18 1989-04-11 Andritz Ag Maschf Pressing machine for and extraction of moisture in particular for filtering.
USRE35091E (en) * 1986-08-18 1995-11-21 Mascheninfabrik Andritz Actiengesellschaft Pressure device and seal for filter belt machines
EP0507085A2 (en) * 1991-04-05 1992-10-07 Firma Theodor Hymmen Apparatus for exerting surface pressure on continuously advancing material
DE4111022A1 (en) * 1991-04-05 1992-10-08 Hymmen Theodor Gmbh DEVICE FOR APPLYING A SURFACE PRESSING TO PROGRESSIVE WORKPIECES
EP0507085A3 (en) * 1991-04-05 1992-11-19 Firma Theodor Hymmen Apparatus for exerting surface pressure on continuously advancing material

Also Published As

Publication number Publication date
US4632722A (en) 1986-12-30
JPH0374883B2 (en) 1991-11-28
FI82630C (en) 1991-04-10
ES295851Y (en) 1988-01-01
JPS6131201A (en) 1986-02-13
FI82630B (en) 1990-12-31
ATE30128T1 (en) 1987-10-15
DE3424599C2 (en) 1992-03-05
IN165551B (en) 1989-11-11
ES295851U (en) 1987-07-01
DE3424599A1 (en) 1986-01-09
FI852634A0 (en) 1985-07-03
FI852634L (en) 1986-01-05
EP0166886A1 (en) 1986-01-08

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