EP1041026A2 - Device for contact-free turning a running web - Google Patents

Device for contact-free turning a running web Download PDF

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Publication number
EP1041026A2
EP1041026A2 EP00104625A EP00104625A EP1041026A2 EP 1041026 A2 EP1041026 A2 EP 1041026A2 EP 00104625 A EP00104625 A EP 00104625A EP 00104625 A EP00104625 A EP 00104625A EP 1041026 A2 EP1041026 A2 EP 1041026A2
Authority
EP
European Patent Office
Prior art keywords
web
housing
air
cover plate
air cushion
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
EP00104625A
Other languages
German (de)
French (fr)
Other versions
EP1041026A3 (en
EP1041026B1 (en
Inventor
Richard Dr. Aust
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.)
Voith Patent GmbH
Original Assignee
Krieger GmbH and Co KG
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 Krieger GmbH and Co KG filed Critical Krieger GmbH and Co KG
Publication of EP1041026A2 publication Critical patent/EP1041026A2/en
Publication of EP1041026A3 publication Critical patent/EP1041026A3/en
Application granted granted Critical
Publication of EP1041026B1 publication Critical patent/EP1041026B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running 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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs

Definitions

  • the invention relates to a device for contactless deflection of a moving web, in particular a paper or cardboard web, by means of a Air cushion according to the preamble of claim 1.
  • the invention has for its object a generic deflection device to improve so that the web runs in a stable path without fluttering onto the web Leading surface runs up and leaves this again.
  • a cover plate projects into the wedge-shaped space between the Web and the housing on the inlet and / or the outlet side. This leads to a Stabilization of the air flow and thus prevents the web from fluttering.
  • the deflection device contains an essentially closed housing 1 in the form of a cylinder segment that extends over the entire width of the to be deflected Paper web 2 extends.
  • One of the housing 1 forming, in the longitudinal direction Boundary walls 3 extending over the entire width of the web is designed that its outer wall surface serving as a guide surface corresponds to the desired path runs curved.
  • the boundary wall 3 contains Air outlet openings 4 over the entire area as a guide surface for the web 2 serving outer surface are arranged.
  • the air outlet openings 4 are either Holes arranged in rows or slots. The rows of holes or slots each extend over the entire width of the web and are in the direction of web travel Spaced from each other so that air emerging from them is an air cushion forms on which the web 2 floats.
  • the housing 1 from a Cover wall 9 completed, which is also over the entire width of the web extends.
  • the housing 1 is supported by a side plate 10 on each of the two end faces completed, which is designed to match the cross section of the housing 1. in the Inside the housing 1 is an air duct 11 which extends over the web width arranged, which is closed on one side by the side wall 10, on the other side via a corresponding opening in the side wall 10 to a not fan shown is connected.
  • the housing is in the working width Area between the air duct 11 and the outer boundary walls 3, 5, 9 divided into individual segments by transverse bulkheads, each of which has an im Cross section changeable air flap in connection with the interior of the air duct 11 stand. It can be the air supply from the air duct 11 to the individual Set segments.
  • a cover plate 12, 13 is arranged, which extends from the housing 1 in the direction extends to lane 2.
  • Each cover plate 12, 13 extends substantially over the entire web width, i.e. the length of the housing 1, and ends in one Distance between 5 mm and 30 mm from the web 2.
  • Each cover plate 12, 13 protrudes so as an obstacle to the flow from the air cushion between the Boundary wall 3 and the web 2 in or against air flowing air in the wedge-shaped space 7, 8 between a longitudinal wall 5, 6 and the web 2. So the flow behavior of the outflowing air to prevent a Track flutter affected.

Landscapes

  • Advancing Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The device for turning a moving web (2) of paper or cardboard without contact using an air cushion comprises a housing with curved outer wall (3) over which the web passes. Air is blown through outlets (4) in the wall to produce the air cushion. Cover plates (12, 13) on either side of the housing extend to within 5 -30 mm of the web and cover the same breadth of it.

Description

Die Erfindung betrifft eine Vorrichtung zum berührungslosen Umlenken einer bewegten Bahn, insbesondere einer Papier- oder Kartonbahn, mittels eines Luftpolsters gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for contactless deflection of a moving web, in particular a paper or cardboard web, by means of a Air cushion according to the preamble of claim 1.

Bei der Herstellung und Verarbeitung von empfindlichen Materialbahnen, beispielsweise Papier- oder Kartonbahnen, ist es häufig erforderlich, die Bahn berührungslos umzulenken. So werden in Beschichtungsanlagen für Papier- oder Kartonbahnen die beschichteten Bahnen vor dem Trocknen berührungslos, auf einem Luftpolster schwebend umgelenkt, falls um eine beschichtete Bahnseite umgelenkt werden muß.In the production and processing of sensitive material webs, For example, paper or cardboard webs, it is often necessary to use the web redirect without contact. So in coating systems for paper or Cardboard webs the coated webs contactlessly before drying on one Air cushions are deflected floating, if deflected around a coated web side must become.

Aus der DE 43 34 473 ist eine gattungsgemäße Umlenkvorrichtung mit einem sich über die Bahnbreite erstreckenden Gehäuse bekannt, das an ein Gebläse zur Erzeugung des Luftpolsters angeschlossen ist. Eine der sich über die Bahnbreite erstreckenden Begrenzungswände des Gehäuses hat eine äußere Wandfläche, die entsprechend dem gewünschten Bahnlauf gekrümmt verläuft und eine Reihe von Luftaustrittsöffnungen aufweist. Durch die Luftaustrittsöffnungen tritt die dem Innern des Gehäuses mit Überdruck zugeführte Luft aus und bildet ein Luftpolster, auf dem die Bahn schwebend um die äußere Begrenzungsfläche geführt wird.From DE 43 34 473 is a generic deflection device with one Housing known across the web width, which is connected to a blower Generation of the air cushion is connected. One of the ones across the web width extending boundary walls of the housing has an outer wall surface that runs curved according to the desired path and a series of Has air outlet openings. It enters the interior through the air outlet openings of the housing with excess pressure and forms an air cushion on which the web is guided floating around the outer boundary surface.

In der Praxis hat es sich gezeigt, dass insbesondere bei hohen Bahngeschwindigkeiten beim Auflauf und beim Ablauf der Bahn von der als Führungsfläche dienenden Begrenzungsfläche des Gehäuses Bahnführungsprobleme auftreten können. Unter bestimmten Bedingungen beginnt die Bahn zu flattern. Ein Bahnflattern kann zum Abriß der Bahn, zum Abspritzen von Beschichtungsmaterial oder zur Bildung von Falten führen.In practice it has been shown that especially at high Path speeds during the run-up and the course of the path from the as Guide surface serving boundary surface of the housing Web guiding problems can occur. Under certain conditions, the Flapping train. A web flutter can be used to tear off the web, to spray off Coating material or wrinkles.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Umlenkvorrichtung so zu verbessern, dass die Bahn in einem stabilen Bahnlauf ohne zu flattern auf die Führungsfläche aufläuft und diese auch wieder verläßt.The invention has for its object a generic deflection device to improve so that the web runs in a stable path without fluttering onto the web Leading surface runs up and leaves this again.

Diese Aufgabe wird mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with the features of patent claim 1.

Es wurde erkannt, dass die Bahn mit dem Gehäuse an der Zulauf- und Ablaufseite einen Diffusor für die vom Luftpolster abströmende Luft bildet. Die an der Bahnzulaufund -ablaufseite in und gegen Bahnlaufrichtung ausströmende Luft erzeugt eine Diffusorströmung, die unter bestimmten Bedingungen instabil wird und so das Bahnflattern verursacht.It was recognized that the web with the housing on the inlet and outlet side forms a diffuser for the air flowing out of the air cushion. The one at the train inlet and -Outflow air flowing out in and against the web running direction generates a Diffuser flow that becomes unstable under certain conditions and so that Caused web flutter.

Nach der Erfindung ragt eine Abdeckplatte in den keilförmigen Raum zwischen der Bahn und dem Gehäuse an der Zulauf- und/oder der Ablaufseite. Dies führt zu einer Stabilisierung der Luftströmung und verhindert so ein Flattern der Bahn.According to the invention, a cover plate projects into the wedge-shaped space between the Web and the housing on the inlet and / or the outlet side. This leads to a Stabilization of the air flow and thus prevents the web from fluttering.

Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain preferred, since particularly advantageous, configurations the invention.

Die Zeichnung dient zur Erläuterung der Erfindung anhand eines vereinfacht dargestellten Ausführungsbeispiels.

Figur 1
zeigt eine Seitenansicht einer Umlenkvorrichtung nach der Erfindung.
The drawing serves to explain the invention with reference to an embodiment shown in simplified form.
Figure 1
shows a side view of a deflection device according to the invention.

Die Umlenkvorrichtung enthält ein im wesentlichen geschlossenes Gehäuse 1 in Form eines Zylindersegmentes, das sich über die gesamte Breite der umzulenkenden Papierbahn 2 erstreckt. Eine der das Gehäuse 1 bildenden, sich in Längsrichtung über die gesamte Bahnbreite erstreckenden Begrenzungswände 3 ist so gestaltet, dass seine als Führungsfläche dienende äußere Wandfläche entsprechend dem gewünschten Bahnlauf gekrümmt verläuft. Die Begrenzungswand 3 enthält Luftaustrittsöffnungen 4, die über die gesamte, als Führungsfläche für die Bahn 2 dienende Außenfläche angeordnet sind. Die Luftaustrittsöffnungen 4 sind entweder Löcher, die in Reihen angeordnet sind oder Schlitze. Die Lochreihen oder Schlitze erstrecken sich jeweils über die gesamte Bahnbreite und sind in Bahnlaufrichtung mit Abstand voneinander angeordnet, so dass aus ihnen austretende Luft ein Luftpolster bildet, auf der die Bahn 2 schwebt.The deflection device contains an essentially closed housing 1 in the form of a cylinder segment that extends over the entire width of the to be deflected Paper web 2 extends. One of the housing 1 forming, in the longitudinal direction Boundary walls 3 extending over the entire width of the web is designed that its outer wall surface serving as a guide surface corresponds to the desired path runs curved. The boundary wall 3 contains Air outlet openings 4 over the entire area as a guide surface for the web 2 serving outer surface are arranged. The air outlet openings 4 are either Holes arranged in rows or slots. The rows of holes or slots each extend over the entire width of the web and are in the direction of web travel Spaced from each other so that air emerging from them is an air cushion forms on which the web 2 floats.

An der Zu- und Ablaufseite der Bahn 2 schließen sich an die gekrümmte Begrenzungswand 3 jeweils eine Längswand 5, 6 an, die sich jeweils ebenfalls über die gesamte Bahnbreite erstrecken und zum Bahnlauf abgewinkelt verlaufen, so dass ein keilförmiger Zulauf- und Ablaufspalt 7, 8 entsteht. An der zur gekrümmten Begrenzungswand 3 entgegengesetzten Seite wird das Gehäuse 1 von einer Deckwand 9 abgeschlossen, die sich ebenfalls über die gesamte Bahnbreite erstreckt. An beiden Stirnseiten wird das Gehäuse 1 von jeweils einer Seitenplatte 10 abgeschlossen, die dem Querschnitt des Gehäuses 1 angepaßt gestaltet ist. Im Innern des Gehäuses 1 ist ein sich über die Bahnbreite erstreckender Luftkanal 11 angeordnet, der an einer Seite von der Seitenwand 10 verschlossen ist, an der anderen Seite über eine entsprechende Öffnung in der Seitenwand 10 an ein nicht dargestelltes Gebläse angeschlossen ist. Über die Arbeitsbreite ist das Gehäuse im Bereich zwischen dem Luftkanal 11 und den äußeren Begrenzungswänden 3, 5, 9 durch Querschotten in einzelne Segmente unterteilt, die jeweils über eine im Querschnitt veränderbare Luftklappe mit dem Innern des Luftkanals 11 in Verbindung stehen. Es läßt sich so die Luftzufuhr aus dem Luftkanal 11 zu den einzelnen Segmenten einstellen.On the inlet and outlet side of the web 2 close to the curved Boundary wall 3 each have a longitudinal wall 5, 6, which also each over extend the entire width of the web and run at an angle to the web, so that a wedge-shaped inlet and outlet gap 7, 8 is formed. On the curved one Boundary wall 3 opposite side, the housing 1 from a Cover wall 9 completed, which is also over the entire width of the web extends. The housing 1 is supported by a side plate 10 on each of the two end faces completed, which is designed to match the cross section of the housing 1. in the Inside the housing 1 is an air duct 11 which extends over the web width arranged, which is closed on one side by the side wall 10, on the other side via a corresponding opening in the side wall 10 to a not fan shown is connected. The housing is in the working width Area between the air duct 11 and the outer boundary walls 3, 5, 9 divided into individual segments by transverse bulkheads, each of which has an im Cross section changeable air flap in connection with the interior of the air duct 11 stand. It can be the air supply from the air duct 11 to the individual Set segments.

An der Bahnzulaufseite und/oder an der Bahnablaufseite, bevorzugt an beiden Seiten, ist eine Abdeckplatte 12, 13 angeordnet, die sich vom Gehäuse 1 in Richtung zur Bahn 2 erstreckt. Jede Abdeckplatte 12, 13 erstreckt sich im wesentlichen über die gesamte Bahnbreite, also die Länge des Gehäuses 1, und endet in einem Abstand zwischen 5 mm und 30 mm von der Bahn 2. Jede Abdeckplatte 12, 13 ragt so als Strömungshindernis für die aus dem Luftpolster zwischen der Begrenzungswand 3 und der Bahn 2 in oder gegen Bahnlaufrichtung strömenden Luft in den keilförmigen Raum 7, 8 zwischen einer Längswand 5, 6 und der Bahn 2. So wird das Strömungsverhalten der abströmenden Luft zur Verhinderung eines Bahnflatterns beeinflußt. On the web inlet side and / or on the web outlet side, preferably on both Sides, a cover plate 12, 13 is arranged, which extends from the housing 1 in the direction extends to lane 2. Each cover plate 12, 13 extends substantially over the entire web width, i.e. the length of the housing 1, and ends in one Distance between 5 mm and 30 mm from the web 2. Each cover plate 12, 13 protrudes so as an obstacle to the flow from the air cushion between the Boundary wall 3 and the web 2 in or against air flowing air in the wedge-shaped space 7, 8 between a longitudinal wall 5, 6 and the web 2. So the flow behavior of the outflowing air to prevent a Track flutter affected.

Bevorzugt ist jede Abdeckplatte 12, 13 an dem Gehäuse 1 sich zur Bahn 2 hin streckend befestigt. Um den Abstand zur Bahn 2 zur Optimierung der Strömungsverhältnisse einstellen zu können, ist jede Abdeckplatte bevorzugt in Richtung zur Bahn 2 verstellbar gelagert. Im Ausführungsbeispiel sind die Abdeckplatten 12, 13 Abdeckbleche, die an der Deckplatte 9 in Richtung zur Bahn 2 verstellbar festgeschraubt sind.Each cover plate 12, 13 on the housing 1 is preferably towards the web 2 stretched attached. To optimize the distance to web 2 To be able to set flow conditions, each cover plate is preferred in Direction to track 2 adjustable. In the exemplary embodiment, the Cover plates 12, 13 cover plates on the cover plate 9 in the direction of the web 2nd are adjustable screwed.

An den Stirnseiten - also an den Bahnrändern - sind die von der Bahn 2, einem Seitenteil 5, 6 und einer Abdeckplatte 12, 13 begrenzten Räume 7, 8 vorzugsweise offen gestaltet. So kann die das Luftpolster bildende Luft an den Stirnseiten abströmen.At the front - at the edges of the web - are from web 2, one Side part 5, 6 and a cover plate 12, 13 limited spaces 7, 8 preferably designed open. So the air forming the air cushion on the front sides flow out.

Claims (3)

Vorrichtung zum berührungslosen Umlenken einer bewegten Bahn (2), insbesondere einer Papier- oder Kartonbahn, mittels eines Luftpolsters,
mit einem sich über die Bahnbreite erstreckenden Gehäuse (1), das an ein Gebläse zur Erzeugung des Luftpolsters angeschlossen ist und eine Begrenzungswand (3) aufweist, deren äußere Wandfläche als Führungsfläche für die Bahn (2) gekrümmt verläuft und Luftaustrittsöffnungen (4) aufweist, dadurch gekennzeichnet, dass an der Bahnzulaufseite und/oder an der Bahnablaufseite eine Abdeckplatte (12, 13) angeordnet ist, die sich vom Gehäuse (1) in Richtung zur Bahn (2) erstreckt und in einem Abstand zwischen 5 mm und 30 mm von der Bahn (2) endet, und die im wesentlichen über die gesamte Bahnbreite reicht.Device for contactless deflection of a moving web (2), in particular a paper or cardboard web, by means of an air cushion,
with a housing (1) extending over the web width, which is connected to a blower for generating the air cushion and has a boundary wall (3), the outer wall surface of which is curved as a guide surface for the web (2) and has air outlet openings (4), characterized in that a cover plate (12, 13) is arranged on the web inlet side and / or on the web outlet side, which extends from the housing (1) towards the web (2) and at a distance between 5 mm and 30 mm from the Web (2) ends, and extends essentially over the entire web width. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Abdeckplatte (12, 13) an dem Gehäuse befestigt ist.Apparatus according to claim 1, characterized in that the cover plate (12, 13) is attached to the housing. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abdeckplatte (12, 13) in Richtung zur Bahn (2) verstellbar gelagert ist.Apparatus according to claim 1 or 2, characterized in that the cover plate (12, 13) is adjustably mounted in the direction of the web (2).
EP00104625A 1999-04-01 2000-03-03 Device for contact-free turning a running web Expired - Lifetime EP1041026B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19915120 1999-04-01
DE19915120A DE19915120A1 (en) 1999-04-01 1999-04-01 Device for contactless deflection of a moving web

Publications (3)

Publication Number Publication Date
EP1041026A2 true EP1041026A2 (en) 2000-10-04
EP1041026A3 EP1041026A3 (en) 2001-04-18
EP1041026B1 EP1041026B1 (en) 2003-07-16

Family

ID=7903416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00104625A Expired - Lifetime EP1041026B1 (en) 1999-04-01 2000-03-03 Device for contact-free turning a running web

Country Status (3)

Country Link
EP (1) EP1041026B1 (en)
DE (2) DE19915120A1 (en)
ES (1) ES2203360T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10238765A1 (en) * 2002-08-23 2004-03-04 Voith Paper Patent Gmbh Arrangement for contactless guiding and / or deflecting and / or handling a running material web, in particular made of paper or cardboard, and built-in module for building up such an arrangement
DE10358754B4 (en) * 2003-12-12 2011-07-14 M-Real Oyj Rail conveyor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307695A (en) * 1970-08-19 1973-02-21 Ilford Ltd Air flotation turner bars
US4300714A (en) * 1980-01-17 1981-11-17 Beloit Corporation Method and apparatus for silencing of webs
GB2215711A (en) * 1988-03-25 1989-09-27 John William Ford Contactless web support guide
US5242095A (en) * 1990-12-20 1993-09-07 Advance Systems, Inc. Contactless air turn guide with baffles for running webs
DE4334473A1 (en) * 1993-10-11 1995-04-13 Krieger Gmbh & Co Kg Device for levitating a running web

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307695A (en) * 1970-08-19 1973-02-21 Ilford Ltd Air flotation turner bars
US4300714A (en) * 1980-01-17 1981-11-17 Beloit Corporation Method and apparatus for silencing of webs
GB2215711A (en) * 1988-03-25 1989-09-27 John William Ford Contactless web support guide
US5242095A (en) * 1990-12-20 1993-09-07 Advance Systems, Inc. Contactless air turn guide with baffles for running webs
DE4334473A1 (en) * 1993-10-11 1995-04-13 Krieger Gmbh & Co Kg Device for levitating a running web

Also Published As

Publication number Publication date
EP1041026A3 (en) 2001-04-18
DE19915120A1 (en) 2000-10-05
EP1041026B1 (en) 2003-07-16
DE50002886D1 (en) 2003-08-21
ES2203360T3 (en) 2004-04-16

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