EP0165377A1 - Device for creating an excess or low pressure on a longitudinally transported paper web, especially of a corrugated-paper plant - Google Patents

Device for creating an excess or low pressure on a longitudinally transported paper web, especially of a corrugated-paper plant Download PDF

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Publication number
EP0165377A1
EP0165377A1 EP85102135A EP85102135A EP0165377A1 EP 0165377 A1 EP0165377 A1 EP 0165377A1 EP 85102135 A EP85102135 A EP 85102135A EP 85102135 A EP85102135 A EP 85102135A EP 0165377 A1 EP0165377 A1 EP 0165377A1
Authority
EP
European Patent Office
Prior art keywords
openings
paper web
corrugated cardboard
plate
web
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
EP85102135A
Other languages
German (de)
French (fr)
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EP0165377B1 (en
Inventor
Werner Dr. Laumann
Lothar Schröder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Werner H K Peters Maschinenfabrik GmbH
Original Assignee
Werner H K Peters Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Werner H K Peters Maschinenfabrik GmbH filed Critical Werner H K Peters Maschinenfabrik GmbH
Priority to AT85102135T priority Critical patent/ATE29430T1/en
Publication of EP0165377A1 publication Critical patent/EP0165377A1/en
Application granted granted Critical
Publication of EP0165377B1 publication Critical patent/EP0165377B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2877—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts
    • B31F1/2881—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts for bringing a second facer sheet into contact with an already single faced corrugated web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/14—Advancing webs by direct action on web of moving fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated

Definitions

  • the invention relates to a device for generating an overpressure or underpressure on a paper web conveyed in the longitudinal direction, in particular in a corrugated cardboard system, with a chamber which can be connected to an overpressure or underpressure source and whose side facing the paper web is open.
  • the heating plates of a corrugated cardboard machine are designed for maximum web width, which is however not always run.
  • Flexible sealing elements ensure that as little air as possible escapes to the outside. With the help of sliding walls, it is also possible to adapt the compressed air supply to the position of the paper web. The mostly grinding elements used naturally limit the available pressure difference. Furthermore, the sealing elements are subject to wear.
  • vacuum brake vacuum brake
  • the conveyor belt is porous or provided with openings and runs along a vacuum area, so that the entrained web is held on the conveyor belt.
  • a vacuum belt can e.g. are used in a single-sided machine behind the gap between the second corrugating roller and the press roller in order to discharge the single-sided web.
  • the invention is therefore based on the object of providing a device for generating positive or negative pressure on a paper web conveyed in its longitudinal direction, in particular for a corrugated cardboard system in which the pressure and / or the size of the area under pressure can be changed in a simple manner can.
  • the chamber is divided in the longitudinal direction and / or transversely to it by at least a two-part transverse wall with closely adjacent, relatively movable wall sections which have one or more openings and an adjusting device is connected to the movable wall section which brings the openings to partial or complete coverage or out of coverage.
  • the chamber is divided into individual subchambers. If the wall sections lie relative to one another in such a way that the openings are out of coverage, the intermediate wall has a blocking function, i.e. atmosphere under pressure cannot spread further into the neighboring room. By covering the openings partially or completely, however, the same or reduced pressure can be generated in neighboring subchambers. With the aid of the device according to the invention, it is therefore possible to generate a specific overpressure or underpressure according to the size and position of a surface.
  • the device according to the invention can therefore be used, for example, in connection with a pressure hood for uniformly pressing a corrugated cardboard web against heating plates in a heating unit of a corrugated cardboard system in order to make an adjustment to get different web widths.
  • Wear-sensitive sealing elements are not required.
  • a relatively high pressure difference can also be achieved.
  • the principle of the double walls which can be moved relative to one another can also be used, for example, in the case of a pressure hood in such a way that horizontal walls are arranged on the air outlet side in the longitudinal and / or transverse directions.
  • the separate walls only occupy a surface section of the outlet opening, so that a shut-off, throttling or unhindered discharge of compressed air can be set for each surface section.
  • the entire chamber can be under even pressure.
  • the device according to the invention can be used in the same way for vacuum devices, for example in cases in which a paper web is guided along a guide or braking surface which has a number of suction openings connected to a vacuum source.
  • the guide or braking surface is formed by a first plate, below which a second plate is arranged close to one another, the first or second plate being mounted so as to be movable relative to the other is and also has a series of openings and an adjusting device is connected to the movable plate, which brings the openings of the plates either partially or completely covered or out of coverage.
  • the suction pressure on the guide or braking surface can be continuously adjusted between a maximum value and the suction pressure zero in the desired manner.
  • the suction pressure can also be partially varied by dividing the guide surface into individual plates.
  • a vacuum conveyor belt is e.g. used in an advantageous manner to pull off and further transport the one-sided corrugated cardboard web which comes from the nip of the second corrugating roller and the pressing roller.
  • the vacuum belt is permeable to air. His work run runs along a surface that is under negative pressure. This surface can be formed by the double plate according to the invention, which is provided with openings which can be moved relative to one another.
  • the vacuum device according to the invention can also be advantageously used in a so-called vacuum brake use that is connected upstream of the preheater in the corrugated cardboard system and causes the one-sided corrugated cardboard web to be pretensioned.
  • a braking surface can be designed in a similar manner, which serves, for example, to adjust the position of a paper web.
  • Fig. 1 the cross-sectional half of a pressure hood 10 is shown with a top wall 11 and parallel side walls, one of which can be seen at 12.
  • the side wall 12 is provided with a plurality of openings 13. The same applies to the opposite parallel side wall.
  • the front and rear walls, however, are closed like the ceiling wall 11.
  • the hood 10 is completely open at the bottom.
  • the interior 14 of the hood 10 can be connected to a compressed air source (not shown).
  • the hood 10 has two plane-parallel partitions 15, 16. They are in two parts.
  • a wall section 17 or 18 is fixedly connected to the ceiling wall 11.
  • Another wall section 19 or 20 is tight on one side of the fixed wall 17 or 18 and is slidable thereon.
  • the side wall 12 is also assigned a movable wall section 21, similar to the wall sections 19, 20.
  • the movable wall sections 19 to 21 have openings 22 on.
  • the fixed wall sections 17, 18 also have openings 23.
  • Each movable wall section 19 to 21 is assigned an adjusting cylinder 24, which are attached to the top of the ceiling wall 11.
  • Each piston rod 25 is connected to the associated movable wall section.
  • a load belt 26 which can be designed as an endless belt, is arranged below the underside of the hood 10. It is used to apply a uniform pressure to a paper web 27 with the width ABmin. In the position of the movable wall sections 19 to 21 shown in FIG. 1, excess pressure can only build up in the area to the right of the partition 16, that is to say immediately above the paper web 27. The areas to the left thereof remain unpressurized. 2, on the other hand, only the side wall 12 is closed, while the entire space 14 of the hood 10 is under overpressure to load a paper web 28 with the width ABmax.
  • the movable wall sections 19 to 21 are adjusted so that the openings 22 with the openings of the fixed wall sections in partial or complete coverage or out of coverage. With partial overlap, a different pressure distribution can therefore also be achieved.
  • FIGS. 3 to 6 relate to a vacuum conveyor belt.
  • a vacuum chamber 30, the interior of which is connected to a vacuum source (not shown), has on one side a double wall 31 consisting of two plates.
  • the upper plate is denoted by 32 and the lower plate by 33. Both have openings 34 and -35.
  • the plate 33 is stationary, while the plate 32 is slidably mounted on the plate 33.
  • An arm 35a is connected to the plate 32 and is connected to the rod 36 of an adjusting cylinder 37.
  • the arm 35 extends through a longitudinal slot 38 of the fixed plate 33.
  • the plate 32 can be adjusted relative to the plate 33 in order to shut off the openings 34, 35 against one another or to bring them to partial or complete coverage.
  • the state of the shut-off can be seen from FIGS. 3 and 4.
  • the state of complete coverage is shown in FIGS. 5 and 6.
  • a perforated conveyor belt 39 with openings 40 slides above the movable plate 33. It is advanced in the direction of arrow 41.
  • the device shown enables a differently high suction pressure in the region of the conveyor belt 39 depending on the position of the movable plate 32 relative to the fixed plate 33.
  • the driving force of the vacuum belt 39 e.g. for a paper web.
  • FIGS. 3 to 6 can also be used as a vacuum brake.
  • the conveyor belt 39 then ceases to exist.
  • the paper web runs directly on the plate 32, so that it experiences a braking effect at this point, which can also be used to change the position of the paper web.
  • the paper web can also be advanced in the direction of arrow 41.
  • a plurality of plates 32, 33 can also be arranged in one plane in order to obtain a desired suction pressure in desired surface areas.
  • the device shown in FIGS. 3 to 6 can also be used as an alternative or in addition to a device according to FIGS. 1 and 2, for example as a closure of the open side of a pressure hood in order to adjust the pressure, e.g. acts on a load belt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Advancing Webs (AREA)
  • Making Paper Articles (AREA)
  • Paper (AREA)

Abstract

1. Apparatus for exerting a positive or a negative pressure on a longitudinally conveyed paper web, in particular in an undulated board system, comprising a chamber or hood which is connectable to a positive or a negative pressure source and whose side facing the paper web is open, characterized in that closely adjacent, relatively adjustable plates (17, 18, 19, 20, 32, 33) with apertures (22, 23, 34, 35) divide the chamber (14) or hood (10) in moving direction of the paper web (26) or transversely thereto or form the side facing the paper web, and that the respective movable plate is connected to an adjusting device (24, 37) for moving the apertures into partial, total or out of registry.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Erzeugung eines Über- oder eines Unterdrucks auf eine in Längsrichtung geförderte Papierbahn, insbesondere in einer Wellpappenanlage, mit einer an einer Über- oder Unterdruckquelle anschließbaren Kammer, deren eine der Papierbahn zugekehrte Seite geöffnet ist.The invention relates to a device for generating an overpressure or underpressure on a paper web conveyed in the longitudinal direction, in particular in a corrugated cardboard system, with a chamber which can be connected to an overpressure or underpressure source and whose side facing the paper web is open.

Es ist bekannt, ein Belasten einer mit doppelseitiger glatter Deckbahn ausgestatteten Wellpappenbahn in der Heiz- und/oder Kühlpartie einer Wellpappenmaschine mit Druckluft durchzuführen. Oberhalb des Beschwergurts wird eine Haube angeordnet, in der sich ein Lüfter befindet oder die an eine Druckluftquelle angeschlossen ist (DE-OS 22 05 568). Man erhält eine günstige Druckverteilung, die sich vorteilhaft auf den Klebe- und Trocknungsvorgang der Wellpappenbahn auswirkt. Außerdem werden auch Hoch- und Tieferscheinungen, die durch ein Ausfallen einer oder mehrerer Wellen entstehen, durch die Druckluftbeaufschlagung ausgeglichen und haben keinen nachteiligen Effekt auf die Qualität der hergestellten Wellpappe. Der gleichmäßige Flächendruck ermöglicht auch einen gleichmäßigen Wärmeübergang von den Heizplatten auf die Wellpappenbahn.It is known to load a corrugated cardboard web equipped with a double-sided smooth cover sheet in the heating and / or cooling section of a corrugated cardboard machine To carry compressed air. A hood is arranged above the weight belt, in which there is a fan or which is connected to a compressed air source (DE-OS 22 05 568). A favorable pressure distribution is obtained, which has an advantageous effect on the gluing and drying process of the corrugated cardboard web. In addition, high and low phenomena caused by the failure of one or more shafts are compensated for by the compressed air and have no adverse effect on the quality of the corrugated cardboard produced. The even surface pressure also enables even heat transfer from the heating plates to the corrugated cardboard web.

Die Heizplatten einer Wellpappenmaschine werden auf maximale Bahnbreite ausgelegt, die jedoch nicht immer gefahren wird. Zur Anpassung an die jeweilige Bahnbreite ist bekannt, die Haubenwände verschiebbar zu machen (DE-AS 1 191 679). Flexible Dichtelemente sorgen dafür, daß möglichst wenig Luft nach außen entweicht. Mit Hilfe verschiebbarer Wände ist es auch möglich, die Druckluftbeaufschlagung an die Lage der Papierbahn anzupassen. Die zumeist schleifend eingesetzten Dichtelemente begrenzen naturgemäß die verfügbare Druckdifferenz. Ferner unterliegen die Dichtelemente dem Verschleiß.The heating plates of a corrugated cardboard machine are designed for maximum web width, which is however not always run. To adapt to the respective web width, it is known to make the hood walls movable (DE-AS 1 191 679). Flexible sealing elements ensure that as little air as possible escapes to the outside. With the help of sliding walls, it is also possible to adapt the compressed air supply to the position of the paper web. The mostly grinding elements used naturally limit the available pressure difference. Furthermore, the sealing elements are subject to wear.

Es ist auch bekannt, mit Hilfe von Unterdruck auf geförderte Papierbahnen eine bremsende Wirkung auszuüben (Vakuumbremse) oder die Papierbahn in einer gewünschten Lage zu führen. Die Fläche, an der die Papierbahn entlanggeführt ist, ist mit einer Reihe von Öffnungen versehen, die an Unterdruck angeschlossen sind. Schließlich ist auch bekannt, eine Papierbahn mit Hilfe eines Vakuumbandes zu fördern (DE-OS 32 32 774). Das Förderband ist porös oder mit Öffnungen versehen und läuft entlang eines Unterdruckbereiches, so daß die mitgenommene Bahn am Förderband festgehalten wird. Ein Vakuumband kann z.B. bei einer einseitigen Maschine eingesetzt werden hinter dem Spalt zwischen der zweiten Riffelwalze und der Preßwalze, um die einseitige Bahn abzufördern. Auch bei diesen Vorrichtungen kann das Problem bestehen, den Unterdruck flächenmäßig zu verändern oder insgesamt in unterschiedlicher Höhe auftreten zu lassen.It is also known to apply a braking effect (vacuum brake) to vacuumed paper webs or to guide the paper web in a desired position. The surface along which the paper web is guided is provided with a series of openings which are connected to negative pressure. Finally, it is also known to promote a paper web with the help of a vacuum belt (DE-OS 32 32 774). The conveyor belt is porous or provided with openings and runs along a vacuum area, so that the entrained web is held on the conveyor belt. A vacuum belt can e.g. are used in a single-sided machine behind the gap between the second corrugating roller and the press roller in order to discharge the single-sided web. These devices can also have the problem of changing the area of the vacuum or causing it to occur at different heights overall.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur Erzeugung von Überdruck oder Unterdruck auf eine in ihrer Längsrichtung geförderte Papierbahn zu schaffen, insbesondere für eine Wellpappenanlage, in der der Druck und/oder die Größe der unter Druck stehenden Fläche auf einfache Weise geändert werden kann.The invention is therefore based on the object of providing a device for generating positive or negative pressure on a paper web conveyed in its longitudinal direction, in particular for a corrugated cardboard system in which the pressure and / or the size of the area under pressure can be changed in a simple manner can.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kammer in Längsrichtung und/oder quer dazu durch mindestens eine zweiteilige Querwand unterteilt ist mit eng aneinanderliegenden, relativ zueinander beweglichen Wandabschnitten, die eine oder mehrere Öffnungen aufweisen und eine Verstellvorrichtung mit dem beweglichen Wandabschnitt verbunden ist, der die Öffnungen zur teilweisen oder völligen Überdeckung oder außer Deckung bringt.This object is achieved in that the chamber is divided in the longitudinal direction and / or transversely to it by at least a two-part transverse wall with closely adjacent, relatively movable wall sections which have one or more openings and an adjusting device is connected to the movable wall section which brings the openings to partial or complete coverage or out of coverage.

Mit Hilfe der Zwischenwände wird die Kammer in einzelne Unterkammern unterteilt. Liegen die Wandabschnitte relativ zueinander derart, daß die Öffnungen außer Deckung sind, übt die Zwischenwand eine Sperrfunktion aus, d.h. unter Druck stehende Atmosphäre kann sich nicht in den benachbarten Raum weiter ausbreiten. Durch teilweise oder völlige Überdeckung der Öffnungen läßt sich hingegen gleicher oderreduzierterDruck in benachbarten Unterkammern erzeugen. Mit Hilfe der erfindungsgemäßen Vorrichtung ist es daher möglich, nach Größe und Lage einer Fläche einen gezielten Über- oder Unterdruck zu erzeugen.With the help of the partition walls, the chamber is divided into individual subchambers. If the wall sections lie relative to one another in such a way that the openings are out of coverage, the intermediate wall has a blocking function, i.e. atmosphere under pressure cannot spread further into the neighboring room. By covering the openings partially or completely, however, the same or reduced pressure can be generated in neighboring subchambers. With the aid of the device according to the invention, it is therefore possible to generate a specific overpressure or underpressure according to the size and position of a surface.

Die erfindungsgemäße Vorrichtung kann daher z.B. in Verbindung mit einer Druckhaube zum gleichmäßigen Anpressen einer Wellpappenbahn an Heizplatten in einer Heizeinheit einer Wellpappenanlage verwendet werden, um eine Anpassung an unterschiedliche Bahnbreiten zu erhalten. Verschleißträchtige Dichtelemente sind nicht erforderlich. Es läßt sich auch eine verhältnismäßig hohe Druckdifferenz erreichen.The device according to the invention can therefore be used, for example, in connection with a pressure hood for uniformly pressing a corrugated cardboard web against heating plates in a heating unit of a corrugated cardboard system in order to make an adjustment to get different web widths. Wear-sensitive sealing elements are not required. A relatively high pressure difference can also be achieved.

Das Prinzip der relativ zueinander verschiebbaren Doppelwände läßt sich etwa bei einer Druckhaube auch noch derart einsetzen, daß in Längs- und/oder Querrichtungen horizontale Wände an der Luftaustrittsseite angeordnet sind. Die getrennten Wände nehmen nur einen Flächenabschnitt der Austrittsöffnung ein, so daß pro Flächenabschnitt eine Absperrung, eine Drosselung oder ein ungehinderter Austritt von Druckluft eingestellt werden kann. In diesem Fall kann die gesamte Kammer unter gleichmäßigem Druck stehen.The principle of the double walls which can be moved relative to one another can also be used, for example, in the case of a pressure hood in such a way that horizontal walls are arranged on the air outlet side in the longitudinal and / or transverse directions. The separate walls only occupy a surface section of the outlet opening, so that a shut-off, throttling or unhindered discharge of compressed air can be set for each surface section. In this case, the entire chamber can be under even pressure.

Die erfindungsgemäße Vorrichtung läßt sich in gleicher Weise für Unterdruckeinrichtungen verwenden, etwa in Fällen, in denen eine Papierbahn entlang einer Führungs-oder Bremsfläche geführt wird, die eine Reihe von an einer Unterdruckquelle angeschlossenenSaugöffnungen aufweist. In diesem Zusammenhang sieht eine Ausgestaltung der Erfindung vor, daß die Führungs- oder Bremsfläche von einer ersten Platte gebildet ist, unterhalb der eine zweite Platte eng anliegend angeordnet ist, die erste oder zweite Platte relativ zur anderen beweglich gelagert ist und ebenfalls eine Reihe von Öffnungen aufweist und mit der beweglichen Platte eine Verstellvorrichtung verbunden ist, die die Öffnungen der Platten wahlweise zur teilweisen oder völligen Überdeckung oder außer Deckung bringt.The device according to the invention can be used in the same way for vacuum devices, for example in cases in which a paper web is guided along a guide or braking surface which has a number of suction openings connected to a vacuum source. In this context, an embodiment of the invention provides that the guide or braking surface is formed by a first plate, below which a second plate is arranged close to one another, the first or second plate being mounted so as to be movable relative to the other is and also has a series of openings and an adjusting device is connected to the movable plate, which brings the openings of the plates either partially or completely covered or out of coverage.

Mit Hilfe einer derartigen Vorrichtung läßt sich der Saugdruck an der Führungs- oder Bremsfläche stufenlos zwischen einem Höchstwert und dem Saugdruck Null in gewünschter Weise verstellen. Durch Unterteilung der Führungsfläche in einzelne Platten läßt sich der Saugdruck auch partiell variieren.With the help of such a device, the suction pressure on the guide or braking surface can be continuously adjusted between a maximum value and the suction pressure zero in the desired manner. The suction pressure can also be partially varied by dividing the guide surface into individual plates.

Vorteilhaft ist auch die Anwendung der erfindungsgemäßen Vorrichtung auf ein Vakuumförderband. Ein Vakuumförderband wird z.B. in vorteilhafter Weise benutzt, um die einseitige Wellpappenbahn, welche aus dem Spalt von zweiter Riffelwalze und Preßwalze kommt, abzuziehen und weiterzutransportieren. Das Vakuumband ist luftdurchlässig. Sein Arbeitstrumm läuft entlang.einer Fläche, die unter Unterdruck steht. Diese Fläche kann von der erfindungsgemäßen Doppelplatte gebildet werden, die mit relativ zueinander verschiebbaren Öffnungen versehen ist.It is also advantageous to use the device according to the invention on a vacuum conveyor belt. A vacuum conveyor belt is e.g. used in an advantageous manner to pull off and further transport the one-sided corrugated cardboard web which comes from the nip of the second corrugating roller and the pressing roller. The vacuum belt is permeable to air. His work run runs along a surface that is under negative pressure. This surface can be formed by the double plate according to the invention, which is provided with openings which can be moved relative to one another.

Die erfindungsgemäße Unterdruckeinrichtung läßt sich auch in vorteilhafter Weise bei einer sogenannten Vakuumbremse verwenden, die in der Wellpappenanlage dem Vorheizer vorgeschaltet ist und bewirkt, daß die einseitige Wellpappenbahn eine Vorspannung erhält. In ähnlicher Weise kann eine Bremsfläche ausgeführt werden, die z.B. dazu dient, die Lage einer Papierbahn einzustellen.The vacuum device according to the invention can also be advantageously used in a so-called vacuum brake use that is connected upstream of the preheater in the corrugated cardboard system and causes the one-sided corrugated cardboard web to be pretensioned. A braking surface can be designed in a similar manner, which serves, for example, to adjust the position of a paper web.

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.The invention is explained in more detail below with reference to drawings.

  • Fig. 1 zeigt einen Schnitt durch eine Drucklufthaube für die Heizeinheit einer Wellpappenmaschine.Fig. 1 shows a section through a compressed air hood for the heating unit of a corrugated cardboard machine.
  • Fig. 2 zeigt die gleiche Schnittdarstellung wie Fig. 1, jedoch in einer anderen Betriebsstellung.Fig. 2 shows the same sectional view as Fig. 1, but in a different operating position.
  • Fig. 3 zeigt einen Schnitt durch einen Abschnitt eines Vakuumförderbandes.Fig. 3 shows a section through a section of a vacuum conveyor belt.
  • Fig. 4 zeigt eine Draufsicht auf die Vorrichtung nach Fig. 3 ohne Transportband.FIG. 4 shows a top view of the device according to FIG. 3 without a conveyor belt.
  • Fig. 5 zeigt im Schnitt einen Teil der Darstellung nach Fig. 3, jedoch in einer anderen Betriebsstellung.Fig. 5 shows in section part of the illustration of Fig. 3, but in a different operating position.
  • Fig. 6 zeigt die Draufsicht auf die Darstellung nach Fig. 5.FIG. 6 shows the top view of the illustration according to FIG. 5.

Bevor auf die in den Zeichnungen dargestellten Einzelheiten näher eingegangen wird, sei vorangestellt, daß jedes der beschriebenen Merkmale für sich oder in Verbindung mit Merkmalen der Ansprüche von erfindungswesentlicher Bedeutung ist.Before going into the details shown in the drawings, it should be stated that each of the features described is of importance for the invention, either individually or in conjunction with features of the claims.

In Fig. 1 ist die Querschnittshälfte einer Druckhaube 10 dargestellt mit einer Deckenwand 11 und parallelen Seitenwänden, von denen eine bei 12 zu sehen ist. Die Seitenwand 12 ist mit mehreren Öffnungen 13 versehen. Das gleiche gilt für die gegenüberliegende parallele Seitenwand. Vorder- und Rückwand sind hingegen wie die Deckenwand 11 geschlossen. Nach unten ist die Haube 10 völlig offen. Der Innenraum 14 der Haube 10 ist mit einer Druckluftquelle (nicht gezeigt) verbindbar. Im Innenraum 14 weist die Haube 10 zwei planparallele Trennwände 15, 16 auf. Sie sind doppelteilig. Ein Wandabschnitt 17 bzw. 18 ist fest mit der Deckenwand 11 verbunden. Ein weiterer Wandabschnitt 19 bzw. 20 liegt an einer Seite der festen Wand 17 bzw. 18 eng an und ist gleitend darauf verschiebbar. Der Seitenwand 12 ist ebenfalls ein beweglicher Wandabschnitt 21 zugeordnet, ähnlich den Wandabschnitten 19, 20. Die beweglichen Wandabschnitte 19 bis 21 weisen öffnungen 22 auf. Die feststehenden Wandabschnitte 17, 18 weisen ebenfalls Öffnungen 23 auf. Jedem beweglichen Wandabschnitt 19 bis 21 ist ein verstellzylinder 24 zugeordnet, die auf der Oberseite der Deckenwand 11 angebracht sind. Jede Kolbenstange 25 ist mit dem.zugeordneten beweglichen Wandabschnitt verbunden.In Fig. 1, the cross-sectional half of a pressure hood 10 is shown with a top wall 11 and parallel side walls, one of which can be seen at 12. The side wall 12 is provided with a plurality of openings 13. The same applies to the opposite parallel side wall. The front and rear walls, however, are closed like the ceiling wall 11. The hood 10 is completely open at the bottom. The interior 14 of the hood 10 can be connected to a compressed air source (not shown). In the interior 14, the hood 10 has two plane-parallel partitions 15, 16. They are in two parts. A wall section 17 or 18 is fixedly connected to the ceiling wall 11. Another wall section 19 or 20 is tight on one side of the fixed wall 17 or 18 and is slidable thereon. The side wall 12 is also assigned a movable wall section 21, similar to the wall sections 19, 20. The movable wall sections 19 to 21 have openings 22 on. The fixed wall sections 17, 18 also have openings 23. Each movable wall section 19 to 21 is assigned an adjusting cylinder 24, which are attached to the top of the ceiling wall 11. Each piston rod 25 is connected to the associated movable wall section.

Unterhalb der Unterseite der Haube 10 ist ein Belastungsgurt 26 angeordnet, der als Endlosband ausgebildet sein kann. Er dient zum Aufbringen eines gleichmäßigen Drucks auf eine Papierbahn 27 mit der Breite ABmin. In der in Fig. 1 dargestellten Position der beweglichen Wandabschnitte 19 bis 21 kann sich ein Überdruck nur in dem Bereich rechts der Trennwand 16 aufbauen, also unmittelbar oberhalb der Papierbahn 27. Die Bereiche links davon bleiben drucklos. In der Darstellung nach Fig. 2 hingegen ist nur die Seitenwand 12 verschlossen, während der gesamte Raum 14 der Haube 10 unter Überdruck steht zur Belastung einer Papierbahn 28 mit der Breite ABmax.A load belt 26, which can be designed as an endless belt, is arranged below the underside of the hood 10. It is used to apply a uniform pressure to a paper web 27 with the width ABmin. In the position of the movable wall sections 19 to 21 shown in FIG. 1, excess pressure can only build up in the area to the right of the partition 16, that is to say immediately above the paper web 27. The areas to the left thereof remain unpressurized. 2, on the other hand, only the side wall 12 is closed, while the entire space 14 of the hood 10 is under overpressure to load a paper web 28 with the width ABmax.

Mit Hilfe der gezeigten Vorrichtung ist es möglich, einzelne Bereiche der Druckhaube abzuschotten und damit in diesem Bereich eine Beschwerung des Belastungsgurts 26 zu eliminieren. Entsprechend werden die beweglichen Wandabschnitte 19 bis 21 so verstellt, daß die Öffnungen 22 mit den Öffnungen der feststehenden Wandabschnitte in teilweiser oder völliger Überdeckung liegen oder außer Deckung. Bei teilweiser Überdeckung läßt sich mithin auch eine unterschiedliche Druckverteilung erreichen.With the aid of the device shown, it is possible to isolate individual areas of the pressure hood and thus to eliminate weighting on the load belt 26 in this area. Accordingly, the movable wall sections 19 to 21 are adjusted so that the openings 22 with the openings of the fixed wall sections in partial or complete coverage or out of coverage. With partial overlap, a different pressure distribution can therefore also be achieved.

Die Ausführungsformen nach den Fig. 3 bis 6 betreffen ein Vakuum-Förderband. Eine Vakuumkammer 30, deren Innenraum an eine nicht gezeigte Vakuumquelle angeschlossen ist, besitzt an einer Seite eine.aus zwei Platten bestehende Doppelwand 31. Die obere Platte ist mit 32 und die untere mit 33 bezeichnet. Beide weisen Öffnungen 34 bzw. -35 auf. Die Platte 33 ist stationär, während die Platte 32 auf der Platte 33 verschiebbar gelagert ist. Mit der Platte 32 ist ein Arm 35averbunden, der mit der Stange 36 eines Verstellzylinders 37 verbunden ist. Der Arm 35 erstreckt sich durch einen Längsschlitz 38 der feststehenden Platte 33. Mit Hilfe des Verstellzylinders 37 kann die Platte 32 relativ zur Platte 33 verstellt werden, um die Öffnungen 34, 35 gegeneinander abzusperren oder zur teilweisen oder völligen Überdeckung zu bringen. Der Zustand der Absperrung ist aus Fig. 3 und Fig. 4 zu entnehmen. Der Zustand der völligen Überdeckung ergibt sich aus den Fig. 5 und 6.The embodiments according to FIGS. 3 to 6 relate to a vacuum conveyor belt. A vacuum chamber 30, the interior of which is connected to a vacuum source (not shown), has on one side a double wall 31 consisting of two plates. The upper plate is denoted by 32 and the lower plate by 33. Both have openings 34 and -35. The plate 33 is stationary, while the plate 32 is slidably mounted on the plate 33. An arm 35a is connected to the plate 32 and is connected to the rod 36 of an adjusting cylinder 37. The arm 35 extends through a longitudinal slot 38 of the fixed plate 33. With the aid of the adjusting cylinder 37, the plate 32 can be adjusted relative to the plate 33 in order to shut off the openings 34, 35 against one another or to bring them to partial or complete coverage. The state of the shut-off can be seen from FIGS. 3 and 4. The state of complete coverage is shown in FIGS. 5 and 6.

Oberhalb der beweglichen Platte 33 gleitet ein Loch-Förderband 39 mit Öffnungen 40. Es wird in Richtung des Pfeils 41 vorbewegt.A perforated conveyor belt 39 with openings 40 slides above the movable plate 33. It is advanced in the direction of arrow 41.

Die gezeigte Vorrichtung ermöglicht im Bereich des Förderbandes 39 einen unterschiedlich hohen Ansaugdruck je nach Stellung der beweglichen Platte 32 relativ zur feststehenden Platte 33. Entsprechend ist die Mitnahmekraft des Vakuumbandes 39, z.B. für eine Papierbahn.The device shown enables a differently high suction pressure in the region of the conveyor belt 39 depending on the position of the movable plate 32 relative to the fixed plate 33. The driving force of the vacuum belt 39, e.g. for a paper web.

Die in den Fig. 3 bis 6 beschriebene Anordnung kann auch als Vakuumbremse verwendet werden. Das Förderband 39 kommt dann in Fortfall. Die Papierbahn läuft direkt auf der Platte 32, so daß sie an dieser Stelle eine Bremswirkung erfährt, die auch dazu ausgenutzt werden kann, die Lage der Papierbahn zu verändern. Die Papierbahn kann ebenfalls in Richtung des Pfeils 41 vorbewegt werden.The arrangement described in FIGS. 3 to 6 can also be used as a vacuum brake. The conveyor belt 39 then ceases to exist. The paper web runs directly on the plate 32, so that it experiences a braking effect at this point, which can also be used to change the position of the paper web. The paper web can also be advanced in the direction of arrow 41.

Es kann auch eine Mehrzahl von Platten 32, 33 in einer Ebene angeordnet sein, um in gewünschten Flächenbereichen einen gewünschten Ansaugdruck zu erhalten. Die in den Fig. 3 bis 6 gezeigte Vorrichtung kann auch alternativ oder zusätzlich zu einer Vorrichtung nach Fig. 1 und 2 eingesetzt werden, beispielsweise als Abschluß der offenen Seite einer Druckhaube, um den Druck, der z.B. auf einen Belastungsgurt wirkt, zu verändern.A plurality of plates 32, 33 can also be arranged in one plane in order to obtain a desired suction pressure in desired surface areas. The device shown in FIGS. 3 to 6 can also be used as an alternative or in addition to a device according to FIGS. 1 and 2, for example as a closure of the open side of a pressure hood in order to adjust the pressure, e.g. acts on a load belt.

Claims (4)

1. Vorrichtung zur Erzeugung eines Über- oder eines Unterdrucks auf eine in Längsrichtung geförderte Papierbahn, insbesondere in einer Wellpappenanlage, mit einer an einer Über- oder Unterdruckquelle anschließbaren Kammer, deren eine der Papierbahn zugekehrte Seite geöffnet ist, dadurch gekennzeichnet, daß die Kammer (14) in Laufrichtung und/oder quer dazu ; durch mindestens eine zweiteilige Querwand (15, 16) unterteilt ist mit eng aneinanderliegenden, relativ zueinander beweglichen Wandabschnitten (17, 18, 19, 20), die eine oder mehrere Öffnungen (22, 23) aufweisen und eine Verstellvorrichtung (24) mit den beweglichen Wandabschnitten (19, 20) verbunden ist, die die Öffnungen zur teilweisen oder völligen Überdeckung oder außer Deckung bringt.1. Device for generating an overpressure or underpressure on a paper web conveyed in the longitudinal direction, in particular in a corrugated cardboard system, with a chamber which can be connected to an overpressure or underpressure source and whose one side facing the paper web is open, characterized in that the chamber ( 14) in the direction of travel and / or transversely thereto; is divided by at least one two-part transverse wall (15, 16) with closely adjacent, relatively movable wall sections (17, 18, 19, 20) which have one or more openings (22, 23) and an adjusting device (24) with the movable ones Wall sections (19, 20) is connected, which brings the openings to partial or complete coverage or out of coverage. 2. Vorrichtung, bei der eine oder mehrere nach unten offene Hauben oberhalb von Heizplatten einer Wellpappenbeklebemaschine angeordnet sind, in denen-ein Überdruck erzeugt wird, der über ein Endlosförderband auf die zugewandte Seite der Wellpappenbahn wirkt, insbesondere nach Anspruch 1, dadurch gekennzeichnet, daß die Haube (10) in Laufrichtung durch mehrere parallel beabstandete Zwischenwände (17, i8) unterteilt ist, von denen jede mindestens zwei mit einer Reihe von Öffnungen (22, 23) versehene, eng aneinanderliegende Zwischenwandabschnitte (17, 18, 19, 20) aufweist, von denen einer stationär und der andere beweglich gelagert ist und der bewegliche Zwischenwandabschnitt (19, 20) jeweils mit einer Verstellvorrichtung (24) verbunden ist, die die Öffnungen zur teilweisen oder völligen Überdeckung oder außer Deckung bringt.2. Device in which one or more downwardly open hoods are arranged above the hot plates of a corrugated cardboard gluing machine, in which an overpressure is generated, which acts via an endless conveyor belt on the facing side of the corrugated cardboard web, in particular according to claim 1, characterized in that the hood (10) in the running direction through a plurality of parallel partition walls (17, i8) is divided, each of which has at least two closely spaced intermediate wall sections (17, 18, 19, 20) provided with a series of openings (22, 23), one of which is stationary and the other movably supported and the movable intermediate wall section (19 , 20) is each connected to an adjusting device (24) which brings the openings to partial or complete coverage or out of coverage. 3. Vorrichtung, bei der eine Papierbahn entlang einer Führungs- oder Bremsfläche geführt wird, die eine Reihe von an einer Unterdruckquelle angeschlossene Saugöffnungen aufweist, insbesondere Vakuumbremse oder Bahnführungseinrichtung in einer Wellpappenanlage, dadurch gekennzeichnet, daß die Führungs- oder Bremsfläche von einer ersten Platte (32) gebildet ist, unterhalb der eine zweite Platte (33) eng anliegend angeordnet ist, die erste oder zweite Platte relativ zur anderen beweglich gelagert ist und ebenfalls eine Reihe von Öffnungen aufweist und mit der beweglichen Platte (32) eine Verstellvorrichtung (37) verbunden ist, die die Öffnungen der Platten wahlweise zur teilweisen oder völligen Überdeckung oder außer Deckung bringt.3. Device in which a paper web is guided along a guide or braking surface which has a number of suction openings connected to a vacuum source, in particular a vacuum brake or web guiding device in a corrugated cardboard system, characterized in that the guiding or braking surface is supported by a first plate ( 32) is formed, below which a second plate (33) is arranged in close contact, the first or second plate is movably mounted relative to the other and also has a number of openings and is connected to the movable plate (32) by an adjusting device (37) is, which brings the openings of the plates either partially or completely covered or out of coverage. 4. Vorrichtung nach Anspruch 3, gekennzeichnet durch die Anwendung auf ein Vakuumförderband (39), das entlang der Doppelplatten (32, 33) geführt ist.4. The device according to claim 3, characterized by the application to a vacuum conveyor belt (39) which is guided along the double plates (32, 33).
EP85102135A 1984-06-16 1985-02-27 Device for creating an excess or low pressure on a longitudinally transported paper web, especially of a corrugated-paper plant Expired EP0165377B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102135T ATE29430T1 (en) 1984-06-16 1985-02-27 DEVICE FOR GENERATING AN OVERPRESSURE OR A VACUUM PRESSURE ON A PAPER WEB TRANSPORTED IN THE LONGITUDINAL DIRECTION, PARTICULARLY IN A CORRUGATOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843422413 DE3422413A1 (en) 1984-06-16 1984-06-16 DEVICE FOR GENERATING A PRESSURE OR A PRESSURE ON A PAPER RAIL PROMOTED IN THE LONG DIRECTION, IN PARTICULAR IN A CARDBOARD PLANT
DE3422413 1984-06-16

Publications (2)

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EP0165377A1 true EP0165377A1 (en) 1985-12-27
EP0165377B1 EP0165377B1 (en) 1987-09-09

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EP (1) EP0165377B1 (en)
AT (1) ATE29430T1 (en)
DE (2) DE3422413A1 (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
EP0281814A1 (en) * 1987-03-02 1988-09-14 Mitsubishi Jukogyo Kabushiki Kaisha Double facer
EP1010525A1 (en) * 1998-12-15 2000-06-21 MAN Roland Druckmaschinen AG Sheet guiding device for a printing machine
ES2157765A1 (en) * 1999-03-05 2001-08-16 Panisello Daniel A Sa Automatic and manual activation pressure side friction lock system for adherence and drying of the papers composing corrugated cardboard
US6637960B2 (en) * 2001-10-31 2003-10-28 Hewlett-Packard Development Company, L.P. Vacuum holddown device for hardcopy apparatus

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN103753868A (en) * 2014-02-13 2014-04-30 朱丹华 Piston type controllable switching device

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DE813627C (en) * 1946-02-05 1951-09-13 James William Weston Evans Paper or similar machine for dewatering whole garments
AT307864B (en) * 1970-06-13 1973-06-12 Voith Gmbh J M Suction box for a paper machine
DE2051048B2 (en) * 1970-10-17 1974-11-21 J.M. Voith Gmbh, 7920 Heidenheim Wire section of a machine for producing a fiber web
GB2079260A (en) * 1980-06-28 1982-01-20 Hebenstreit Gmbh Separating Wafer Leaves, Rice- paper Leaves and the Like from a Magazine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281814A1 (en) * 1987-03-02 1988-09-14 Mitsubishi Jukogyo Kabushiki Kaisha Double facer
EP1010525A1 (en) * 1998-12-15 2000-06-21 MAN Roland Druckmaschinen AG Sheet guiding device for a printing machine
ES2157765A1 (en) * 1999-03-05 2001-08-16 Panisello Daniel A Sa Automatic and manual activation pressure side friction lock system for adherence and drying of the papers composing corrugated cardboard
US6637960B2 (en) * 2001-10-31 2003-10-28 Hewlett-Packard Development Company, L.P. Vacuum holddown device for hardcopy apparatus

Also Published As

Publication number Publication date
EP0165377B1 (en) 1987-09-09
ATE29430T1 (en) 1987-09-15
DE3560554D1 (en) 1987-10-15
DE3422413A1 (en) 1985-12-19

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