EP1144292B1 - Device for guiding or treating a continuous line of material in a contactless manner, especially a line of paper or cardboard or a metal or plastic film - Google Patents

Device for guiding or treating a continuous line of material in a contactless manner, especially a line of paper or cardboard or a metal or plastic film Download PDF

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Publication number
EP1144292B1
EP1144292B1 EP99962223A EP99962223A EP1144292B1 EP 1144292 B1 EP1144292 B1 EP 1144292B1 EP 99962223 A EP99962223 A EP 99962223A EP 99962223 A EP99962223 A EP 99962223A EP 1144292 B1 EP1144292 B1 EP 1144292B1
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EP
European Patent Office
Prior art keywords
web
paper
wall
plastic film
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99962223A
Other languages
German (de)
French (fr)
Other versions
EP1144292A3 (en
EP1144292A2 (en
Inventor
Bruno Holtmann
Konrad Dessovic
José Antonio MENA
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.)
Bachofen and Meier AG Maschinenfabrik
Original Assignee
Bachofen and Meier AG Maschinenfabrik
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
Priority claimed from DE19902936A external-priority patent/DE19902936A1/en
Application filed by Bachofen and Meier AG Maschinenfabrik filed Critical Bachofen and Meier AG Maschinenfabrik
Publication of EP1144292A2 publication Critical patent/EP1144292A2/en
Publication of EP1144292A3 publication Critical patent/EP1144292A3/en
Application granted granted Critical
Publication of EP1144292B1 publication Critical patent/EP1144292B1/en
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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
    • B65H23/32—Arrangements for turning or reversing webs
    • 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
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/113—Details of the part distributing the air cushion
    • B65H2406/1131—Porous material

Definitions

  • the invention relates to a device for contactless guiding or treatment a running material web, in particular a paper or cardboard web, metal or plastic film, in which the web of material from a cushion of a gaseous Fluid is supported, according to the preamble of claim 1. Furthermore
  • the invention relates to a coating device in which the invention Device for supporting the web of material is used, a dryer and a Remoistening device in which the device according to the invention Moisture content of a material web is set to a certain value, as well a web storage device and a spreader device for material webs.
  • DE 27 52 574-C is a generic one Deflection device known, which has a chamber to which a feed for Compressed air is connected as a gaseous fluid, and the one gas-permeable wall has, whose outer surface is designed as a guide surface for the web. Both known deflection devices, the air cushion is several millimeters thick. The Compressed air is led outside through openings in the form of nozzles, so that large amounts of compressed air are necessary, moreover do not occur at the railway covered areas on large compressed air losses.
  • EP 0364 392-A2 describes a spreading device for separating longitudinally cut ones Sheets according to the preamble of claim 1, which has two tubes deflecting the sheets.
  • the pipes included a porous layer made of a porous plastic and a porosity has between 20 and 100 microns. Compressed air passes through the inside of the pipes porous layer and forms an air cushion that the friction between the tube and the Orbits decreased.
  • the invention has for its object a generic device for Guiding or treating a running material web so that it improves with low fluid quantities and losses ensure safe, contactless guiding of the web is guaranteed via the guide surface.
  • the gas permeable wall of the chamber serves as a guide surface for the web, made of a porous, metal-containing material manufactured, whose open pores have an average diameter of less than 20 microns exhibit.
  • porous material for the guide surface, it is possible to Let the web slide on a fluid cushion less than 1 mm thick. The There are losses of the gaseous fluid on the areas not covered by the web very low. Another advantage is that the porous material through the automatically cleans gaseous fluid. Coating material on the guide surface drips, is derived from the fluid cushion created without clogging the pores.
  • the material is for the gas permeable wall is a porous thermoset metal composite, preferred a thermoset aluminum composite.
  • the structure of these composite materials contains open pores which are distributed in any direction and which have branched channels through the Form material. The gaseous fluid flows through the wall very evenly.
  • the material is very dimensionally stable and can be easily processed.
  • a material with a share of the open pore area on the outer surface of the gas permeable wall of less than 20%, preferably less than 10%, according to Claim 3 has with regard to the flow conditions and the forming pressure pad shown as particularly suitable.
  • the device shown in Figures 1 and 2 is used for contactless guiding and Supporting a running material web 1 in a coating system.
  • she can advantageous in all processing plants for flexible material webs, in particular Paper or cardboard webs, plastic or metal foils are used where the running material webs are supported safely and without contact and friction and / or must be managed.
  • the device has one or more chambers 2 on its rear wall in each case a feed 3 for a gaseous fluid is connected.
  • the gaseous fluid is compressed air at which Humidification device according to Figure 5 is water vapor or a water vapor-air mixture fed.
  • the chamber 2 is separated from one plate-shaped, gas-permeable wall 4 completed, which consists of a porous, metal-containing material is made.
  • the material has evenly distributed open pores with an average diameter of less than 500 microns, preferably less than 100 ⁇ m, in particular less than 20 ⁇ m. One has proven to be particularly suitable average pore diameter from 10 microns to 20 microns shown.
  • the material is preferred for the gas-permeable wall 4, a porous thermoset metal composite, in particular a thermoset aluminum composite, with the above pore sizes listed.
  • the outer surface 5 of the wall 4 is a guide surface for the Lane 1 trained.
  • the number of open pore areas on the is preferably Total area of the outer surface 5 less than 20%, in particular less than 10%.
  • the supply lines 3 with the chamber 2 and the wall 4 are in a frame-shaped Holder 6 attached, rigidly to the frame of the processing machine, for example a coating device is attached.
  • the outer surface 5 of the wall 4 is in the embodiment according to FIGS. 1 and 2 evenly formed. This shape of the outer surface 5 is preferably chosen if the device for the flat support of the web 1 in a treatment unit serves, as shown in Figure 3 using the example of a coating unit.
  • the coating device shown in Figure 3 is used to apply Coating material on a paper web or plastic film, for example from Dispersion pressure sensitive adhesives on a sheet-like release material for the production of self-adhesive labels.
  • Other applications are the application of a barrier layer on a sheet-like base material for the production of a moisture-impermeable Packaging material or the application of pigment coating the finishing of paper or cardboard webs.
  • the web 1 is from a deflecting roller 8 in a redirected substantially horizontal path and thus in the desired distance passed through the area below the nozzle 7. In the area of the nozzle 7 Back of web 1 without contact from that shown in Figures 1 and 2 Device supported and guided.
  • the flat outer surface 5 of the gas permeable Wall 4 runs as a guide surface for the web 1 parallel to the desired path and perpendicular to the direction of fall of the coating material.
  • a drip pan 9 of which the coating material at a web break is caught.
  • the web 1 floats on a compressed air cushion, the is generated on the outside of the wall 4 by the fact that in the chamber 2 compressed air up to a few bar pressure is introduced and passes through the porous wall 4.
  • the compressed air cushion produced in this way has the further great advantage that the Guide surface cleans automatically: On the guide surface, for example in the event of a web break, falling coating material slides on the air cushion without the Guide surface is dirty or even the pores in the wall 4 are added.
  • FIG 4 the structure of a support and guide device 10 is shown, which in a coating device, the web 1 below a slot nozzle 7 in a circular arc leads and supports in a curved manner.
  • the support device 10 expands several chambers 2, each on the outside of a porous wall 4th are completed, the outer surface 5 of each wall 4 being cylindrically curved runs.
  • the individual walls 4 are immediately consecutive in the web running direction arranged so that they are closed over the required distance, in Form the cross-section of a curved curved guide surface.
  • the common one frame-shaped holder 6 for all chambers and walls is cylindrical in shape and, like the porous walls 4, extends over the entire width of the web.
  • two alternative web guides after the slot nozzle 7 are one following dryer 11 shown: If the placement of the dryer 11 it enables the web 1 to the dryer 11 after the application of coating material so that no deflection around the coated side is required, so can the web 5 be guided on this route by guide rollers 12, which on the uncoated side are arranged. This web guide is at the top in FIG shown. However, the use of guide rollers is not possible if the web 1 after coating on the route to dryer 11 around the coated side must be deflected, as shown in Figure 4 below.
  • a contactless deflection device 13 use the principle described in the embodiment of Figures 1 and 2 Structure has: A chamber 2 connected to a compressed air supply, which at its the web 1 facing side of a wall 4 from the porous described Material is completed. The outer surface of the wall 4 is then as in the Support device 10 curved in a cylinder. For large deflection angles several chambers 1 can be arranged one behind the other. Lane 1 becomes contactless, floating on a compressed air cushion from the deflection device 13 in the deflected required angle to the dryer 11.
  • Figure 5 shows schematically the structure of a remoistening device for this serves, after drying in a web of material 1 a certain moisture content adjust evenly over the web 1. Too dry or unevenly dried Sheets of paper, cardboard or plastic (e.g. cellophane) tend to to warp (curling effect). To avoid this, be even Residual moisture between 4% and 8% set when rewetting. Usually there is rewetting with steam, which is blown from nozzles against web 1 becomes. It prepares, especially at high web speeds of more than 500 m / min the air boundary layer adhering to the web problems. This prevents sufficient amounts of water vapor penetrate into web 1 and condense there.
  • a certain moisture content adjust evenly over the web 1. Too dry or unevenly dried Sheets of paper, cardboard or plastic (e.g. cellophane) tend to to warp (curling effect). To avoid this, be even Residual moisture between 4% and 8% set when rewetting. Usually there is rewetting with steam, which
  • the invention enables the web 1 on a cushion of a water vapor-air mixture to float and so the steam with considerable pressure at high To press train trains into Bru 1.
  • the web 1 is preferably meandering, as shown in FIG guided by the rewetting device to the compact design To increase treatment time and at the same time to be able to apply high train trains.
  • the remoistening system according to FIG. 5 consists of a vapor-tight housing 14, in which a plurality of web guiding and moistening elements 15 are arranged such that the web 1 is guided in a meandering shape in the housing 14.
  • Every train control and Humidification element 15 has a tubular structure with a gas-permeable Wall 4 in the area wrapped by the web 1.
  • the pipe wall area is made of the porous, metal-containing material, such as he is described in the embodiments of Figures 1 and 2.
  • the inside of the pipe a water vapor-air mixture is fed through the wall 4 to the outside occurs and forms a cushion on which the web 1 floats.
  • the water vapor enters the web 1 and condenses there.
  • FIGs 6 and 7 show devices in which web guide elements 16 for guidance serve the web 1 through a dryer or rewetting device. Hot air (for a dryer) or steam (for a rewetting device) is directed from nozzles 17 against both sides of the web 1. While at the Embodiment according to Figure 6, the web 1 straight through the housing 14 of the Dryer or the rewetting device are performed in the embodiment 7, the web guiding elements 16 are designed and arranged such that the Web is guided in a meandering manner, each deflected by 180 °.
  • the web guiding elements 16 each have a porous wall 4 with the in the area wrapped by the web 1 Features described above. To build up the pressure cushion between the web 1 and the wall 4 of the guide element 16 are compressed air or steam or a mixture of both the interior of the guide element, which is designed as chamber 2 16 fed, and exits through the wall 4 to the outside.
  • FIG. 8 shows a particularly compact drying or rewetting device, for the treatment of the web 1, this inside the housing 14 is carried over an extremely long distance.
  • the web 1 is initially spiraled from guided inwards from outside, redirected there and again spiraling from inside to guided outside before it leaves the housing 14.
  • For the spiral guidance of the Web 1 are web guiding elements 16 on the diagonals through the housing arranged, of which the web 1 is deflected by 90 °.
  • the web guiding elements 16 have a porous wall 4 in the wrapped area through which to build up a pressure cushion for the floating guidance of the web 1 compressed air from flows inside out.
  • the housing 14 In the middle of the housing 14 are two in cross section semicircular path guide elements 18 are arranged, of which the path by 180 ° is redirected to then spiral again with reverse direction of rotation to be led outside.
  • nozzles 17 Along the free route between two Web guiding elements 16 are arranged nozzles 17, from which a treatment medium flows against both sides of the railway. If the web is dried, the treatment medium is Hot air. If the device is used for rewetting, flows out of the nozzles 17 Water vapor or a water vapor / air mixture against both sides of the web.
  • FIG. 9 shows a web store using web guide elements according to the invention 16 shown.
  • the web store contains web guiding elements in a known manner, the frame parts 19 which can be moved towards and away from one another, 20 are stored.
  • the web guide elements 16 described above Elements are used which have a porous wall 4 around which the web is turned around Is steered 180 ° without contact.
  • To the The two frame parts 19, 20 are used to store a certain length of web moved apart.
  • Another advantageous application for an inventive Web guiding device is the spreading of material webs.
  • Spreader devices are known to be used to tension in the direction of Generate web edges so that there are no longitudinal waves or folds in the webs occur.
  • the spreader device is built from a tubular Base body 21, the lateral surface of which is cambered in a known manner, that is to say his Pipe wall 22 is slightly convex on the outside over the length of the pipe (FIG. 10).
  • the cylindrical tube wall 22 can also be over its Be curved in length, ie have a curved axis, such as is shown in Figure 11.
  • the tube wall 22 is wholly or partially over the circumference made of the porous material described, so that the web 1 when deflecting is suspended on an air cushion that passes from the inside out through the Wall 22 flowing compressed air is formed.
  • the invention offers the possibility of Bombage over the circumference of the tubular base body 21 differently design to be able to vary the spreading effect.

Landscapes

  • Advancing Webs (AREA)
  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Known devices for contactlessly guiding or treating continuous lines of material (1) have one chamber (2). A supply device (3) for a gaseous fluid is connected to said chamber (2), which has a gas-permeable wall (4). The outer surface (5) of said wall (4) is embodied as a guide surface for the line (1). According to the invention, the gas-permeable wall (4) is produced from a porous, metal-containing material with open pores which have an average diameter of less than 500 mum, preferably less than 100 mum, especially less than 20 mum. The porous material used for the guiding surface enables the line (1) to glide on a fluid pad of less than 1 mm. The losses of fluid on the surfaces not covered by the line (1) are very low.

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine Vorrichtung zum berührungslosen Führen oder Behandeln einer laufenden Materialbahn, insbesondere einer Papier- oder Kartonbahn, Metall- oder Kunststoffolie, bei der die Materialbahn von einem Polster eines gasförmigen Fluids abgestützt wird, gemäß dem Oberbegriff des Patentanspruchs 1. Weiterhin betrifft die Erfindung eine Beschichtungsvorrichtung, bei der die erfindungsgemäße Vorrichtung zum Stützen der Materialbahn verwendet wird, einen Trockner und eine Rückbefeuchtungsvorrichtung, bei der mittels der erfindungsgemäßen Vorrichtung der Feuchtegehalt einer Materialbahn auf einen bestimmten Wert eingestellt wird, sowie einen Bahnspeicher und eine Breitstreckvorrichtung für Materialbahnen.The invention relates to a device for contactless guiding or treatment a running material web, in particular a paper or cardboard web, metal or plastic film, in which the web of material from a cushion of a gaseous Fluid is supported, according to the preamble of claim 1. Furthermore The invention relates to a coating device in which the invention Device for supporting the web of material is used, a dryer and a Remoistening device in which the device according to the invention Moisture content of a material web is set to a certain value, as well a web storage device and a spreader device for material webs.

Stand der TechnikState of the art

In Verarbeitungsanlagen für Materialbahnen ist es häufig erforderlich, die Bahn berührungslos zu führen oder abzustützen; beispielsweise in Beschichtungsanlagen wenn die noch feuchte Bahn um die beschichtete Seite umgelenkt werden muß. Dazu werden bekannterweise Umlenkvorrichtungen eingesetzt, die aus einem Hohlkörper mit bogenförmiger Mantelfläche bestehen, die Düsen aufweist, durch die Druckluft vom Innern des Hohlkörpers nach außen strömt. Die Bahn wird so auf einem Luftpolster schwebend um die Mantelfläche geführt. Aus der DE 27 52 574-C ist eine gattungsgemäße Umlenkvorrichtung bekannt, die eine Kammer aufweist, an die eine Zufuhr für Druckluft als gasförmiges Fluid angeschlossen ist, und die eine gasdurchlässige Wand aufweist, deren Außenfläche als Leitfläche für die Bahn ausgebildet ist. Bei den bekannten Umlenkvorrichtungen ist das Luftpolster mehrere Millimeter dick. Die Druckluft wird vom Innern durch Öffnungen in Form von Düsen nach außen geführt, so dass große Mengen an Druckluft notwendig sind, zudem treten an den nicht von der Bahn abgedeckten Flächen große Druckluftverluste auf.In processing plants for material webs, it is often necessary to use the web to guide or support without contact; for example in coating systems when the still wet web has to be deflected around the coated side. To are known to use deflecting devices that have a hollow body with arcuate lateral surface, which has nozzles through which compressed air from Flows inside the hollow body to the outside. The web is so on an air cushion floating around the outer surface. DE 27 52 574-C is a generic one Deflection device known, which has a chamber to which a feed for Compressed air is connected as a gaseous fluid, and the one gas-permeable wall has, whose outer surface is designed as a guide surface for the web. Both known deflection devices, the air cushion is several millimeters thick. The Compressed air is led outside through openings in the form of nozzles, so that large amounts of compressed air are necessary, moreover do not occur at the Railway covered areas on large compressed air losses.

Die EP 0364 392-A2 beschreibt eine Spreizeinrichtung zum Trennen längsgeschnittener Bahnen gemäß dem Oberbegriff von Anspruch 1, die zwei die Bahnen umlenkende Rohre aufweist. Die Rohre enthalten eine poröse Schicht, die aus einem porösen Kunststoff gefertigt ist und eine Porosität zwischen 20 und 100 µm aufweist. Aus dem innern der Rohre tritt Druckluft durch die poröse Schicht und bildet ein Luftpolster, das die Reibung zwischen dem Rohr und den Bahnen verringert.EP 0364 392-A2 describes a spreading device for separating longitudinally cut ones Sheets according to the preamble of claim 1, which has two tubes deflecting the sheets. The pipes included a porous layer made of a porous plastic and a porosity has between 20 and 100 microns. Compressed air passes through the inside of the pipes porous layer and forms an air cushion that the friction between the tube and the Orbits decreased.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung zum Führen oder Behandeln einer laufenden Materialbahn so zu verbessern, dass mit geringen Fluidmengen und -verlusten ein sicheres, berührungsloses Führen der Bahn über die Leitfläche gewährleistet ist.The invention has for its object a generic device for Guiding or treating a running material web so that it improves with low fluid quantities and losses ensure safe, contactless guiding of the web is guaranteed via the guide surface.

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

Nach der Erfindung wird die gasdurchlässige Wand der Kammer, deren Außenfläche als Leitfläche für die Bahn dient, aus einem porösen, metallhaltigen Werkstoff gefertigt, dessen offene Poren einen mittleren Durchmesser von weniger als 20 µm aufweisen.According to the invention, the gas permeable wall of the chamber, the outer surface serves as a guide surface for the web, made of a porous, metal-containing material manufactured, whose open pores have an average diameter of less than 20 microns exhibit.

Durch die Verwendung des porösen Werkstoffs für die Leitfläche ist es möglich, die Bahn auf einem Fluidpolster von weniger als 1 mm Dicke gleiten zu lassen. Die Verluste des gasförmigen Fluids an den nicht von der Bahn abgedeckten Flächen sind sehr gering. Als weiterer Vorteil tritt hinzu, dass sich der poröse Werkstoff durch das gasförmige Fluid selbsttätig reinigt. Beschichtungsmaterial, das auf die Leitfläche tropft, wird von dem erzeugten Fluidpolster abgeleitet, ohne die Poren zuzusetzen.By using the porous material for the guide surface, it is possible to Let the web slide on a fluid cushion less than 1 mm thick. The There are losses of the gaseous fluid on the areas not covered by the web very low. Another advantage is that the porous material through the automatically cleans gaseous fluid. Coating material on the guide surface drips, is derived from the fluid cushion created without clogging the pores.

Gemäß der bevorzugten Ausführungsform nach Patentanspruch 2 ist der Werkstoff für die gasdurchlässige Wand ein poröser Duromer-Metall-Verbundwerkstoff, bevorzugt ein Duromer-Aluminium-Verbundwerkstoff. Das Gefüge dieser Verbundwerkstoffe enthält richtungsunabhängig verteilte offene Poren, die verzweigte Kanäle durch den Werkstoff bilden. Das gasförmige Fluid durchströmt die Wand sehr gleichmäßig. Zudem ist der Werkstoff sehr formstabil und läßt sich einfach bearbeiten.According to the preferred embodiment according to claim 2, the material is for the gas permeable wall is a porous thermoset metal composite, preferred a thermoset aluminum composite. The structure of these composite materials contains open pores which are distributed in any direction and which have branched channels through the Form material. The gaseous fluid flows through the wall very evenly. In addition, the material is very dimensionally stable and can be easily processed.

Ein Werkstoff mit einem Anteil der offenen Porenfläche an der Außenfläche der gasdurchlässigen Wand von weniger als 20 %, bevorzugt weniger als 10 %, gemäß Patentanspruch 3 hat sich hinsichtlich der Durchströmungsverhältnisse und des sich bildenden Druckpolsters als besonders geeignet gezeigt. A material with a share of the open pore area on the outer surface of the gas permeable wall of less than 20%, preferably less than 10%, according to Claim 3 has with regard to the flow conditions and the forming pressure pad shown as particularly suitable.

Kurze Beschreibung der ZeichnungBrief description of the drawing

Die Zeichnungen dienen zur Erläuterung der Erfindung anhand vereinfacht dargestellter Ausführungsbeispiele.The drawings serve to explain the invention with reference to a simplified representation Embodiments.

Es zeigen:

Figur 1
eine Draufsicht auf die gasdurchlässige Wand der Kammer einer Abstützvorrichtung mit ebener Leitfläche.
Figur 2
einen Querschnitt der Vorrichtung nach Figur 1.
Figur 3
zeigt den Einsatz eines Elements nach Figur 1 und 2 in einer Beschichtungsanlage.
Figur 4
zeigt das Schema einer Beschichtungsanlage mit einer Stützvorrichtung und einer nachfolgenden Umlenkvorrichtung.
Figur 5
zeigt den schematischen Aufbau einer Befeuchtungsvorrichtung.
Die Figuren 6 bis 8
zeigen schematisch den Aufbau einer Befeuchtungs- oder Trocknungsvorrichtung mit den erfindungsgemäßen Bahnleitelementen.
Figur 9
zeigt schematisch den Aufbau eines Bahnspeichers.
Die Figuren 10 und 11
zeigen jeweils eine Breitstreckvorrichtung.
Show it:
Figure 1
a plan view of the gas permeable wall of the chamber of a support device with a flat guide surface.
Figure 2
2 shows a cross section of the device according to FIG. 1.
Figure 3
shows the use of an element according to Figures 1 and 2 in a coating system.
Figure 4
shows the diagram of a coating system with a support device and a subsequent deflection device.
Figure 5
shows the schematic structure of a humidification device.
Figures 6 to 8
schematically show the structure of a moistening or drying device with the web guide elements according to the invention.
Figure 9
shows schematically the structure of a web store.
Figures 10 and 11
each show a spreader.

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

Die in Figur 1 und 2 dargestellte Vorrichtung dient zum berührungslosen Führen und Stützen einer laufenden Materialbahn 1 in einer Beschichtungsanlage. Sie kann vorteilhaft in allen Verarbeitungsanlagen für flexible Materialbahnen, insbesondere Papier- oder Kartonbahnen, Kunststoff- oder Metallfolien eingesetzt werden, bei denen die laufenden Materialbahnen berührungslos und reibungsfrei sicher abgestützt und/oder geführt werden müssen.The device shown in Figures 1 and 2 is used for contactless guiding and Supporting a running material web 1 in a coating system. she can advantageous in all processing plants for flexible material webs, in particular Paper or cardboard webs, plastic or metal foils are used where the running material webs are supported safely and without contact and friction and / or must be managed.

Die Vorrichtung weist eine oder mehrere Kammern 2 auf, an deren rückwärtige Wand jeweils eine Zufuhr 3 für ein gasförmiges Fluid angeschlossen ist. Bei Vorrichtungen zum Führen oder Stützen einer Bahn 1 ist das gasförmige Fluid Druckluft, bei der Befeuchtungseinrichtung nach Figur 5 wird Wasserdampf oder ein Wasserdampf-Luftgemisch zugeführt.The device has one or more chambers 2 on its rear wall in each case a feed 3 for a gaseous fluid is connected. For devices for guiding or supporting a web 1, the gaseous fluid is compressed air at which Humidification device according to Figure 5 is water vapor or a water vapor-air mixture fed.

An der den Zufuhrleitungen 3 abgewandten Seite wird die Kammer 2 von einer plattenförmigen, gasdurchlässigen Wand 4 abgeschlossen, die aus einem porösen, metallhaltigen Werkstoff gefertigt ist. Der Werkstoff weist gleichverteilte offene Poren mit einem mittleren Durchmesser von weniger als 500 µm, bevorzugt weniger als 100 µm, insbesondere weniger als 20 µm, auf. Als besonders geeignet hat sich einer mittlerer Porendurchmesser von 10 µm bis 20 µm gezeigt. Bevorzugt ist der Werkstoff für die gasdurchlässige Wand 4 ein poröser Duromer-Metall-Verbundwerkstoff, insbesondere ein Duromer-Aluminium-Verbundwerkstoff, mit den vorstehend aufgeführten Porengrößen. Die Außenfläche 5 der Wand 4 ist als Leitfläche für die Bahn 1 ausgebildet. Bevorzugt beträgt die Anzahl der offenen Porenfläche an der Gesamtfläche der Außenfläche 5 weniger als 20 %, insbesondere weniger als 10 %.On the side facing away from the feed lines 3, the chamber 2 is separated from one plate-shaped, gas-permeable wall 4 completed, which consists of a porous, metal-containing material is made. The material has evenly distributed open pores with an average diameter of less than 500 microns, preferably less than 100 µm, in particular less than 20 µm. One has proven to be particularly suitable average pore diameter from 10 microns to 20 microns shown. The material is preferred for the gas-permeable wall 4, a porous thermoset metal composite, in particular a thermoset aluminum composite, with the above pore sizes listed. The outer surface 5 of the wall 4 is a guide surface for the Lane 1 trained. The number of open pore areas on the is preferably Total area of the outer surface 5 less than 20%, in particular less than 10%.

Die Zufuhrleitungen 3 mit der Kammer 2 und der Wand 4 sind in einem rahmenförmigen Halter 6 befestigt, der starr an dem Gestell der Verarbeitungsmaschine, beispielsweise einer Beschichtungsvorrichtung, befestigt ist.The supply lines 3 with the chamber 2 and the wall 4 are in a frame-shaped Holder 6 attached, rigidly to the frame of the processing machine, for example a coating device is attached.

Die Außenfläche 5 der Wand 4 ist in der Ausführungsform nach den Figuren 1 und 2 ebenflächig ausgebildet. Diese Form der Außenfläche 5 wird bevorzugt gewählt, wenn die Vorrichtung zum ebenflächigen Abstützen der Bahn 1 in einem Behandlungsaggregat dient, wie es in Figur 3 am Beispiel eines Beschichtungsaggregats dargestellt ist.The outer surface 5 of the wall 4 is in the embodiment according to FIGS. 1 and 2 evenly formed. This shape of the outer surface 5 is preferably chosen if the device for the flat support of the web 1 in a treatment unit serves, as shown in Figure 3 using the example of a coating unit.

Die in Figur 3 dargestellte Beschichtungsvorrichtung dient zum Auftragen von Beschichtungsmaterial auf eine Papierbahn oder Kunststoffolie, beispielsweise von Dispersionshaftklebstoffen auf ein bahnförmiges Trennmaterial zur Herstellung von selbstklebenden Etiketten. Andere Anwendungen sind das Auftragen einer Barriereschicht auf ein bahnförmiges Grundmaterial zur Herstellung eines feuchtigkeitsundurchlässigen Verpackungsmaterials oder das Auftragen von Pigmentstreichfarbe bei der Veredelung von Papier- oder Kartonbahnen.The coating device shown in Figure 3 is used to apply Coating material on a paper web or plastic film, for example from Dispersion pressure sensitive adhesives on a sheet-like release material for the production of self-adhesive labels. Other applications are the application of a barrier layer on a sheet-like base material for the production of a moisture-impermeable Packaging material or the application of pigment coating the finishing of paper or cardboard webs.

Als Auftragsaggregat dient eine Schlitzdüse 7, die an eine nicht dargestellte Zufuhr für das Beschichtungsmaterial angeschlossen ist und an ihrer Unterseite eine schlitzförmige, sich quer zur Bahnlaufrichtung erstreckende Öffnung aufweist. Aus der Öffnung tritt das Beschichtungsmaterial aus und bildet einen freifallenden Vorhang, der auf die Oberfläche der Bahn 1 fällt. Die Bahn 1 wird von einer Umlenkwalze 8 in einen im wesentlichen horizontalen Bahnverlauf umgelenkt und so in den gewünschten Abstand durch den Bereich unterhalb der Düse 7 geführt. Im Bereich der Düse 7 wird die Rückseite der Bahn 1 berührungslos von der in den Figuren 1 und 2 dargestellten Vorrichtung gestützt und geführt. Die ebene Außenfläche 5 der gasdurchlässigen Wand 4 verläuft als Leitfläche für die Bahn 1 parallel zu dem gewünschten Bahnverlauf und senkrecht zur Fallrichtung des Beschichtungsmaterials. Unterhalb der Stützvorrichtung 8 ist eine Auffangwanne 9 angeordnet, von der das Beschichtungsmaterial bei einem Bahnriß aufgefangen wird. Die Bahn 1 schwimmt auf einem Druckluftpolster, das an der Außenseite der Wand 4 dadurch erzeugt wird, dass in die Kammer 2 Druckluft bis zu einigen Bar Druck eingeleitet wird und durch die poröse Wand 4 hindurchtritt. Das so erzeugte Druckluftpolster hat den weiteren großen Vorteil, dass sich die Leitfläche selbsttätig reinigt: Auf die Leitfläche, beispielsweise bei einem Bahnriß, fallendes Beschichtungsmaterial gleitet auf dem Luftpolster ab, ohne dass die Leitfläche verschmutzt wird oder gar die Poren in der Wand 4 zugesetzt werden.A slot nozzle 7, which is connected to a feed (not shown), serves as the application unit the coating material is connected and a slit-shaped, has opening extending transversely to the web running direction. Steps out of the opening the coating material and forms a free-falling curtain that on the Surface of web 1 falls. The web 1 is from a deflecting roller 8 in a redirected substantially horizontal path and thus in the desired distance passed through the area below the nozzle 7. In the area of the nozzle 7 Back of web 1 without contact from that shown in Figures 1 and 2 Device supported and guided. The flat outer surface 5 of the gas permeable Wall 4 runs as a guide surface for the web 1 parallel to the desired path and perpendicular to the direction of fall of the coating material. Below the support device 8 is a drip pan 9, of which the coating material at a web break is caught. The web 1 floats on a compressed air cushion, the is generated on the outside of the wall 4 by the fact that in the chamber 2 compressed air up to a few bar pressure is introduced and passes through the porous wall 4. The compressed air cushion produced in this way has the further great advantage that the Guide surface cleans automatically: On the guide surface, for example in the event of a web break, falling coating material slides on the air cushion without the Guide surface is dirty or even the pores in the wall 4 are added.

In Figur 4 ist der Aufbau einer Stütz- und Führungsvorrichtung 10 dargestellt, die in einer Beschichtungsvorrichtung die Bahn 1 unterhalb einer Schlitzdüse 7 kreisbogenförmig gekrümmt verlaufend führt und abstützt. Die Stützvorrichtung 10 baut sich aus mehreren Kammern 2 auf, die jeweils an der Außenseite von einer porösen Wand 4 abgeschlossen sind, wobei die Außenfläche 5 jeder Wand 4 zylindrisch gekrümmt verläuft. Die einzelnen Wände 4 sind in Bahnlaufrichtung unmittelbar aufeinanderfolgend angeordnet, so dass sie eine über die erforderliche Wegstrecke geschlossene, im Querschnitt kreisbogenförmig gekrümmte Leitfläche bilden. Der gemeinsame rahmenförmige Halter 6 für alle Kammern und Wände ist im Umriß zylinderschalenförmig und erstreckt sich, ebenso wie die porösen Wände 4 über die gesamte Bahnbreite. In Figure 4, the structure of a support and guide device 10 is shown, which in a coating device, the web 1 below a slot nozzle 7 in a circular arc leads and supports in a curved manner. The support device 10 expands several chambers 2, each on the outside of a porous wall 4th are completed, the outer surface 5 of each wall 4 being cylindrically curved runs. The individual walls 4 are immediately consecutive in the web running direction arranged so that they are closed over the required distance, in Form the cross-section of a curved curved guide surface. The common one frame-shaped holder 6 for all chambers and walls is cylindrical in shape and, like the porous walls 4, extends over the entire width of the web.

In Figur 4 sind zwei alternative Bahnführungen nach der Schlitzdüse 7 zu einem nachfolgenden Trockner 11 dargestellt: Falls die Platzierung des Trockners 11 es ermöglicht, die Bahn 1 dem Trockner 11 nach dem Auftragen von Beschichtungsmaterial so zuzuführen, dass keine Umlenkung um die beschichtete Seite erforderlich ist, so kann die Bahn 5 auf dieser Strecke von Leitwalzen 12 geführt werden, die an der unbeschichteten Seite angeordnet sind. Diese Bahnführung ist in Figur 4 oben dargestellt. Der Einsatz von Leitwalzen ist jedoch dann nicht möglich, wenn die Bahn 1 nach dem Beschichten auf der Strecke zum Trockner 11 um die beschichtete Seite umgelenkt werden muß, wie in Figur 4 unten dargestellt ist. Dann läßt sich zum Umlenken der Bahn 1 vorteilhaft eine berührungslos arbeitende Umlenkvorrichtung 13 einsetzen, die im Prinzip den bei der Ausführungsform nach Figur 1 und 2 beschriebenen Aufbau hat: Eine an eine Druckluftzufuhr angeschlossene Kammer 2, die an ihrer der Bahn 1 zugewandten Seite von einer Wand 4 aus dem beschriebenen porösen Material abgeschlossen wird. Die Außenfläche der Wand 4 ist dann wie bei der Stützvorrichtung 10 zylinderförmig gekrümmt. Für große Umlenkwinkel können mehrere Kammern 1 hintereinander angeordnet werden. Die Bahn 1 wird berührungslos, auf einem Druckluftpolster schwebend von der Umlenkvorrichtung 13 in dem erforderlichen Winkel zu dem Trockner 11 umgelenkt.In Figure 4, two alternative web guides after the slot nozzle 7 are one following dryer 11 shown: If the placement of the dryer 11 it enables the web 1 to the dryer 11 after the application of coating material so that no deflection around the coated side is required, so can the web 5 be guided on this route by guide rollers 12, which on the uncoated side are arranged. This web guide is at the top in FIG shown. However, the use of guide rollers is not possible if the web 1 after coating on the route to dryer 11 around the coated side must be deflected, as shown in Figure 4 below. Then you can Deflection of the web 1 advantageously a contactless deflection device 13 use the principle described in the embodiment of Figures 1 and 2 Structure has: A chamber 2 connected to a compressed air supply, which at its the web 1 facing side of a wall 4 from the porous described Material is completed. The outer surface of the wall 4 is then as in the Support device 10 curved in a cylinder. For large deflection angles several chambers 1 can be arranged one behind the other. Lane 1 becomes contactless, floating on a compressed air cushion from the deflection device 13 in the deflected required angle to the dryer 11.

Figur 5 zeigt schematisch den Aufbau einer Rückbefeuchtungsvorrichtung, die dazu dient, nach dem Trocknen in einer Materialbahn 1 einen bestimmten Feuchtegehalt gleichmäßig über die Bahn 1 einzustellen. Zu trockene oder ungleichmäßig getrocknete Bahnen aus Papier, Karton oder Kunststoff (beispielsweise Zellophan) neigen dazu, sich zu verziehen (Curling-Effekt). Um dies zu vermeiden, wird eine gleichmäßige Restfeuchte zwischen 4 % und 8 % beim Rückbefeuchten eingestellt. Üblicherweise erfolgt die Rückbefeuchtung mit Dampf, der aus Düsen gegen die Bahn 1 geblasen wird. Dabei bereitet, insbesondere bei hohen Bahngeschwindigkeiten von mehr als 500 m/min die an der Bahn haftende Luftgrenzschicht Probleme. Diese verhindert, dass ausreichende Mengen Wasserdampf in die Bahn 1 eindringen und dort kondensieren.Figure 5 shows schematically the structure of a remoistening device for this serves, after drying in a web of material 1 a certain moisture content adjust evenly over the web 1. Too dry or unevenly dried Sheets of paper, cardboard or plastic (e.g. cellophane) tend to to warp (curling effect). To avoid this, be even Residual moisture between 4% and 8% set when rewetting. Usually there is rewetting with steam, which is blown from nozzles against web 1 becomes. It prepares, especially at high web speeds of more than 500 m / min the air boundary layer adhering to the web problems. This prevents sufficient amounts of water vapor penetrate into web 1 and condense there.

Die Erfindung ermöglicht es, die Bahn 1 auf einem Polster aus einem Wasserdampf-Luftgemisch schweben zu lassen und so den Dampf mit erheblichem Druck bei hohen Bahnzügen in die Bahn 1 rein zu pressen. Zusätzlich ist es möglich, die Bahn 1 auf ihrer Gegenseite zu kühlen, um die Kondensation des Wasserdampfs in der Bahn 1 zu unterstützen. Bevorzugt wird die Bahn 1 - wie in Figur 5 dargestellt - mäanderförmig durch die Rückbefeuchtungsvorrichtung geführt, um bei kompakter Bauweise die Behandlungszeit zu erhöhen und zugleich hohe Bahnzüge aufbringen zu können.The invention enables the web 1 on a cushion of a water vapor-air mixture to float and so the steam with considerable pressure at high To press train trains into Bahn 1. In addition, it is possible to lane 1 cooling their opposite side in order to condense the water vapor in the web 1 support. The web 1 is preferably meandering, as shown in FIG guided by the rewetting device to the compact design To increase treatment time and at the same time to be able to apply high train trains.

Die Rückbefeuchtungsanlage nach Figur 5 besteht aus einem dampfdichten Gehäuse 14, in dem mehrere Bahnleit- und Befeuchtungselemente 15 so angeordnet sind, dass die Bahn 1 mäanderförmig in dem Gehäuse 14 geführt wird. Jedes Bahnleit- und Befeuchtungselement 15 hat einen rohrförmigen Aufbau mit einer gasdurchlässigen Wand 4 im von der Bahn 1 umschlungenen Bereich. Im von der Bahn 1 umschlungenen Bereich ist die Rohrwand aus dem porösen, metallhaltigen Werkstoff gefertigt, wie er bei den Ausführungsbeispielen nach Figur 1 und 2 beschrieben ist. Dem Rohrinneren wird ein Wasserdampf-Luftgemisch zugeführt, der durch die Wand 4 nach außen tritt und dort ein Polster bildet, auf dem die Bahn 1 schwimmt. Der Wasserdampf tritt in die Bahn 1 ein und kondensiert dort.The remoistening system according to FIG. 5 consists of a vapor-tight housing 14, in which a plurality of web guiding and moistening elements 15 are arranged such that the web 1 is guided in a meandering shape in the housing 14. Every train control and Humidification element 15 has a tubular structure with a gas-permeable Wall 4 in the area wrapped by the web 1. Im wrapped in the web 1 The pipe wall area is made of the porous, metal-containing material, such as he is described in the embodiments of Figures 1 and 2. The inside of the pipe a water vapor-air mixture is fed through the wall 4 to the outside occurs and forms a cushion on which the web 1 floats. The water vapor enters the web 1 and condenses there.

Die Figuren 6 und 7 zeigen Vorrichtungen, bei denen Bahnleitelemente 16 zur Führung der Bahn 1 durch einen Trockner oder eine Rückbefeuchtungsvorrichtung dienen. Heißluft (bei einem Trockner) oder Wasserdampf (bei einer Rückbefeuchtungsvorrichtung) wird aus Düsen 17 gegen beide Seiten der Bahn 1 geleitet. Während bei der Ausführungsform nach Figur 6 die Bahn 1 geradlinig durch das Gehäuse 14 des Trockners oder der Rückbefeuchtungsvorrichtung geführt wird, sind in der Ausführungsform nach Figur 7 die Bahnleitelemente 16 so gestaltet und angeordnet, dass die Bahn mäanderförmig jeweils um 180° umgelenkt geführt wird. Die Bahnleitelemente 16 weisen jeweils im von der Bahn 1 umschlungenen Bereich eine poröse Wand 4 mit den vorstehend beschriebenen Merkmalen auf. Zum Aufbau des Druckpolsters zwischen der Bahn 1 und der Wand 4 des Leitelements 16 wird jeweils Druckluft oder Dampf oder ein Gemisch aus beiden dem als Kammer 2 ausgebildeten Innern des Leitelements 16 zugeführt, und tritt durch die Wand 4 nach außen.Figures 6 and 7 show devices in which web guide elements 16 for guidance serve the web 1 through a dryer or rewetting device. Hot air (for a dryer) or steam (for a rewetting device) is directed from nozzles 17 against both sides of the web 1. While at the Embodiment according to Figure 6, the web 1 straight through the housing 14 of the Dryer or the rewetting device are performed in the embodiment 7, the web guiding elements 16 are designed and arranged such that the Web is guided in a meandering manner, each deflected by 180 °. The web guiding elements 16 each have a porous wall 4 with the in the area wrapped by the web 1 Features described above. To build up the pressure cushion between the web 1 and the wall 4 of the guide element 16 are compressed air or steam or a mixture of both the interior of the guide element, which is designed as chamber 2 16 fed, and exits through the wall 4 to the outside.

Figur 8 zeigt eine besonders kompakt aufgebaute Trocknungs- oder Rückbefeuchtungsvorrichtung, bei der zur Behandlung der Bahn 1 diese im Innern des Gehäuses 14 über eine extrem lange Strecke geführt wird. Die Bahn 1 wird zunächst spiralförmig von außen nach innen geführt, dort umgelenkt und wieder spiralförmig von innen nach außen geführt, bevor sie das Gehäuse 14 verläßt. Zur spiralförmigen Führung der Bahn 1 sind auf den Diagonalen durch das Gehäuse jeweils Bahnführungselemente 16 angeordnet, von denen die Bahn 1 jeweils um 90° umgelenkt wird. Die Bahnführungselemente 16 weisen im umschlungenen Bereich eine poröse Wand 4 auf, durch die zum Aufbau eines Druckpolsters für das schwebende Führen der Bahn 1 Druckluft von innen nach außen strömt. In der Mitte des Gehäuses 14 sind zwei im Querschnitt halbkreisförmige Bahnleitelemente 18 angeordnet, von denen die Bahn um 180° umgelenkt wird, um anschließend wieder spiralförmig mit umgekehrter Drehrichtung nach außen geführt zu werden. Entlang der freien Strecke zwischen jeweils zwei Bahnleitelementen 16 sind Düsen 17 angeordnet, aus denen ein Behandlungsmedium gegen beide Bahnseiten strömt. Wird die Bahn getrocknet, so ist das Behandlungsmedium Heißluft. Falls die Vorrichtung zum Rückbefeuchten dient, strömt aus den Düsen 17 Wasserdampf bzw. ein Wasserdampf/Luftgemisch gegen beide Bahnseiten.FIG. 8 shows a particularly compact drying or rewetting device, for the treatment of the web 1, this inside the housing 14 is carried over an extremely long distance. The web 1 is initially spiraled from guided inwards from outside, redirected there and again spiraling from inside to guided outside before it leaves the housing 14. For the spiral guidance of the Web 1 are web guiding elements 16 on the diagonals through the housing arranged, of which the web 1 is deflected by 90 °. The web guiding elements 16 have a porous wall 4 in the wrapped area through which to build up a pressure cushion for the floating guidance of the web 1 compressed air from flows inside out. In the middle of the housing 14 are two in cross section semicircular path guide elements 18 are arranged, of which the path by 180 ° is redirected to then spiral again with reverse direction of rotation to be led outside. Along the free route between two Web guiding elements 16 are arranged nozzles 17, from which a treatment medium flows against both sides of the railway. If the web is dried, the treatment medium is Hot air. If the device is used for rewetting, flows out of the nozzles 17 Water vapor or a water vapor / air mixture against both sides of the web.

In Figur 9 ist ein Bahnspeicher unter Verwendung von erfindungsgemäßen Bahnleitelementen 16 dargestellt. Der Bahnspeicher enthält auf bekannte Weise Bahnleitelemente, die in aufeinander zu- und voneinander wegbewegbaren Rahmenteilen 19, 20 gelagert sind. Als Bahnleitelemente 16 werden die vorstehend beschriebenen Elemente verwendet, die eine poröse Wand 4 aufweisen, um die die Bahn jeweils um 180° berührungsfrei gelenkt wird. An jedem Rahmenteil 19, 20 ist jeweils eine Reihe von Leitelementen 16 befestigt, von denen die Bahn 1 entlang einer schlaufenförmigen Strecke geführt wird. Werden die Rahmenteile 19, 20 aufeinander zu bewegt, so verkürzt sich jeweils die freie Bahnstrecke zwischen zwei benachbarten Leitelementen 16. Es wird so eine gespeicherte Bahnlänge aus dem Bahnspeicher abgegeben. Zum Speichern einer bestimmten Bahnlänge werden die beiden Rahmenteil 19, 20 auseinanderbewegt.FIG. 9 shows a web store using web guide elements according to the invention 16 shown. The web store contains web guiding elements in a known manner, the frame parts 19 which can be moved towards and away from one another, 20 are stored. The web guide elements 16 described above Elements are used which have a porous wall 4 around which the web is turned around Is steered 180 ° without contact. There is one row on each frame part 19, 20 attached by guide elements 16, of which the web 1 along a loop-shaped Route is performed. If the frame parts 19, 20 are moved towards one another, so the free path between two adjacent guide elements is shortened 16. A stored web length is thus released from the web memory. To the The two frame parts 19, 20 are used to store a certain length of web moved apart.

Eine weitere vorteilhafte Anwendungsmöglichkeit für eine erfindungsgemäße Bahnführungsvorrichtung ist das Breitstrecken von Materialbahnen. Breitstreckvorrichtungen werden bekannterweise eingesetzt, um eine Zugspannung in Richtung der Bahnränder zu erzeugen, damit keine Längswellen oder -falten in den Bahnen auftreten.Another advantageous application for an inventive Web guiding device is the spreading of material webs. Spreader devices are known to be used to tension in the direction of Generate web edges so that there are no longitudinal waves or folds in the webs occur.

Nach der Erfindung baut sich die Breitstreckvorrichtung aus einem rohrförmigen Grundkörper 21 auf, dessen Mantelfläche auf bekannte Weise bombiert ist, also seine Rohrwand 22 außen über die Rohrlänge etwas konvex gekrümmt verläuft (Figur 10). Anstelle einer Bombierung kann die zylinderförmige Rohrwand 22 auch über ihre Länge gekrümmt gestaltet sein, also eine gekrümmt verlaufende Achse aufweisen, wie in Figur 11 dargestellt ist. Die Rohrwand 22 ist über den Umfang ganz oder teilweise aus dem beschriebenen porösen Material gefertigt, so dass die Bahn 1 beim Umlenken auf einem Luftpolster schwebend geführt wird, das von innen nach außen durch die Wand 22 strömender Druckluft gebildet wird. Die Erfindung bietet die Möglichkeit, die Bombage über den Umfang des rohrförmigen Grundkörpers 21 unterschiedlich zu gestalten, um die Spreizwirkung variieren zu können.According to the invention, the spreader device is built from a tubular Base body 21, the lateral surface of which is cambered in a known manner, that is to say his Pipe wall 22 is slightly convex on the outside over the length of the pipe (FIG. 10). Instead of a crowning, the cylindrical tube wall 22 can also be over its Be curved in length, ie have a curved axis, such as is shown in Figure 11. The tube wall 22 is wholly or partially over the circumference made of the porous material described, so that the web 1 when deflecting is suspended on an air cushion that passes from the inside out through the Wall 22 flowing compressed air is formed. The invention offers the possibility of Bombage over the circumference of the tubular base body 21 differently design to be able to vary the spreading effect.

Claims (9)

  1. Apparatus for the non-contact guidance or treatment of a moving material web (1), in particular a paper or board web, metal foil or plastic film, having a chamber (2), to which a supply (3) for a gaseous fluid is connected and which has a gas-permeable wall (4) of a porous material, whose outer surface (5) is designed as a guide surface for the web (1), characterized in that the gas-permeable wall (4) is produced from a material containing metal and having open pores which have an average diameter of less than 20 µm.
  2. Apparatus according to Claim 1, characterized in that the material for the gas-permeable wall (4) is a porous thermosetting plastic-metal composite material, in particular a thermosetting plastic-aluminium composite material.
  3. Apparatus according to Claim 1 or 2, characterized in that the proportion of the open pore area on the outer surface of the gas-permeable wall (4) is less than 20%, preferably less than 10%.
  4. Apparatus according to one of Claims 1 to 3, characterized in that the outer surface (5) of the wall (4) runs in a flat or convexly curved manner.
  5. Apparatus for coating a material web (1), in particular a paper or board web, plastic film or metal foil, having an applicator unit for applying coating material, characterized in that in order to support the web (1) during the application and/or in order to guide the web (1), use is made of an apparatus according to one of Claims 1 to 4.
  6. Apparatus for drying a material web (1), in particular a paper or board web, metal foil or plastic film, characterized by web guide elements (16, 18) which are constructed in accordance with an apparatus according to one of Claims 1 to 4, for the guidance and/or deflection of the web (1).
  7. Apparatus for rewetting material webs (1), in particular paper or board webs, metal foils or plastic films, characterized by one or more apparatuses according to one of Claims 1 to 4 for the guidance of the web (1) through the apparatus and/or for the treatment of the web (1) with water vapour, preferably in a water vapour-air mixture.
  8. Web accumulator for a material web (1), in particular a paper or board web, metal foil or plastic film, in which the web (1) is led in a loop around web guide elements (16) whose spacing from one another can be varied, characterized in that the web guide elements (16) are constructed in accordance with the apparatus according to one of Claims 1 to 4.
  9. Apparatus for spreading a material web (1), in particular a paper or board web, metal foil or plastic film, having a basic tubular body (21) whose tube wall (22) is cambered or runs with a curved axis, characterized in that the basic body (21) is constructed, wholly or partially as a chamber, in accordance with the apparatuses according to one of Claims 1 to 4.
EP99962223A 1998-12-23 1999-12-06 Device for guiding or treating a continuous line of material in a contactless manner, especially a line of paper or cardboard or a metal or plastic film Expired - Lifetime EP1144292B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19859619 1998-12-23
DE19859619 1998-12-23
DE19902936 1999-01-26
DE19902936A DE19902936A1 (en) 1998-12-23 1999-01-26 Device for contactless guiding or treatment of a running material web, in particular a paper or cardboard web, metal or plastic film
PCT/EP1999/009530 WO2000039011A2 (en) 1998-12-23 1999-12-06 Device for guiding or treating a continuous line of material in a contactless manner, especially a line of paper or cardboard or a metal or plastic film

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EP1144292A2 EP1144292A2 (en) 2001-10-17
EP1144292A3 EP1144292A3 (en) 2002-09-11
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US (1) US6635111B1 (en)
EP (1) EP1144292B1 (en)
CN (1) CN1123522C (en)
AT (1) ATE238218T1 (en)
ES (1) ES2203229T3 (en)
WO (1) WO2000039011A2 (en)

Cited By (7)

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US7025303B2 (en) 2003-06-17 2006-04-11 Reifenhauser Gmbh & Co. Maschinenfabrik Turning bar for contactless guidance of a tubular film
DE10349890B4 (en) * 2003-10-25 2007-03-15 Koenig & Bauer Ag Device for longitudinal cutting of a web
DE202004021518U1 (en) 2004-09-09 2008-09-04 Koenig & Bauer Aktiengesellschaft printing presses
US7479003B2 (en) 2003-06-17 2009-01-20 Reifenhauser Gmbh & Co. Maschinenfabrik Method and device for producing a film made of a thermoplastic material
DE202010009955U1 (en) 2010-07-07 2010-10-07 Plamex Maschinenbau Gmbh Device for the extrusion of a hose
DE102004031366B4 (en) * 2004-03-04 2014-09-04 Windmöller & Hölscher Kg blown film extrusion

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DE502004000592D1 (en) * 2003-02-19 2006-06-22 Koenig & Bauer Ag PRINTING MACHINE FOR RAILWAY MATERIAL
DE10322519A1 (en) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Web guiding means
DE10322524A1 (en) * 2003-05-19 2004-12-23 Voith Paper Patent Gmbh seal means
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US7267153B2 (en) 2004-03-02 2007-09-11 Herbert B Kohler Corrugator glue machine having web tension nulling mechanism
US20050194088A1 (en) * 2004-03-02 2005-09-08 Kohler Herbert B. Method and apparatus for making corrugated cardboard
US8057621B2 (en) * 2005-04-12 2011-11-15 Kohler Herbert B Apparatus and method for producing a corrugated product under ambient temperature conditions
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KR101383134B1 (en) * 2006-09-27 2014-04-09 후지필름 가부시키가이샤 Web guiding roller and web conveying apparatus
EP2170598A1 (en) * 2007-06-20 2010-04-07 Herbert B. Kohler Method for producing corrugated cardboard
ES2742693T3 (en) 2008-03-21 2020-02-17 Hbk Family Llc Apparatus for producing corrugated cardboard
WO2010085614A1 (en) * 2009-01-22 2010-07-29 Kohler Herbert B Method for moisture and temperature control in corrugating operation
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JP4704507B1 (en) * 2010-03-26 2011-06-15 日東電工株式会社 Inflation extrusion apparatus and method for pressure-sensitive adhesive sheet
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Publication number Priority date Publication date Assignee Title
US7025303B2 (en) 2003-06-17 2006-04-11 Reifenhauser Gmbh & Co. Maschinenfabrik Turning bar for contactless guidance of a tubular film
US7479003B2 (en) 2003-06-17 2009-01-20 Reifenhauser Gmbh & Co. Maschinenfabrik Method and device for producing a film made of a thermoplastic material
US7604770B2 (en) 2003-06-17 2009-10-20 REIFENHäUSER GMBH & CO. MASCHINENFABRIK Method of producing a film made of a thermoplastic material
DE10349890B4 (en) * 2003-10-25 2007-03-15 Koenig & Bauer Ag Device for longitudinal cutting of a web
DE102004007374B3 (en) * 2004-02-16 2005-08-04 Koenig & Bauer Ag Device for contactless sensing of a path has supporting element surface for guiding path with micro-openings enabling fluid under pressure to escape; supporting surface is opposite sensor
DE102004031366B4 (en) * 2004-03-04 2014-09-04 Windmöller & Hölscher Kg blown film extrusion
DE202004021518U1 (en) 2004-09-09 2008-09-04 Koenig & Bauer Aktiengesellschaft printing presses
DE202010009955U1 (en) 2010-07-07 2010-10-07 Plamex Maschinenbau Gmbh Device for the extrusion of a hose

Also Published As

Publication number Publication date
ES2203229T3 (en) 2004-04-01
EP1144292A3 (en) 2002-09-11
EP1144292A2 (en) 2001-10-17
US6635111B1 (en) 2003-10-21
WO2000039011A2 (en) 2000-07-06
ATE238218T1 (en) 2003-05-15
WO2000039011A3 (en) 2000-08-10
CN1329571A (en) 2002-01-02
CN1123522C (en) 2003-10-08

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