EP0744366A2 - Stationary slide rail - Google Patents

Stationary slide rail Download PDF

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Publication number
EP0744366A2
EP0744366A2 EP96107713A EP96107713A EP0744366A2 EP 0744366 A2 EP0744366 A2 EP 0744366A2 EP 96107713 A EP96107713 A EP 96107713A EP 96107713 A EP96107713 A EP 96107713A EP 0744366 A2 EP0744366 A2 EP 0744366A2
Authority
EP
European Patent Office
Prior art keywords
slide bar
web
bar according
region
running
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
EP96107713A
Other languages
German (de)
French (fr)
Other versions
EP0744366A3 (en
EP0744366B1 (en
Inventor
Kurt Eichinger
Walter Humplstötter
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
Voith Sulzer Papiermaschinen 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 Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0744366A2 publication Critical patent/EP0744366A2/en
Publication of EP0744366A3 publication Critical patent/EP0744366A3/en
Application granted granted Critical
Publication of EP0744366B1 publication Critical patent/EP0744366B1/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
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • 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
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • 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
    • B65H23/34—Apparatus for taking-out curl from webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/38—Pads
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting

Definitions

  • the invention relates to a stationary slide bar for guiding a running fibrous web, in particular a paper or cardboard web.
  • Sketch No. 300 of document D1 shows a so-called fold spreading strip in the area of a roll cutting machine, which feeds the partial webs to a winding device after the longitudinal cutting of the paper web.
  • FIGS. 3-6 so-called air support beams are known, each consisting of a hollow profile beam, which has a large number of blown air bores on its side facing the paper web.
  • These air-jet bars are usually arranged on the outlet side of a web coater, on the painted side of the web. With considerable effort for the supply of the blown air, it is ensured that the freshly painted and thus still wet side of the paper web never comes into direct contact with the air bar.
  • the object of the present invention is to design a stationary slide bar for guiding a paper or cardboard web in such a way that it can be produced with as little effort as possible and can generally be used without an active air supply.
  • the advantage of these measures is that, on the one hand, the web to be guided can come into contact temporarily or temporarily with the surface of the slide bar, but on the other hand, if the running speed is sufficiently high - thanks to the formation of an aerodynamic lubricating wedge - it is mostly contactless over the convexly rounded surface the slide bar slides.
  • the slide bar according to the invention is therefore suitable for use preferably where a rotatable web guide roller has previously been required. Such guide rollers are not only expensive to manufacture, but also require ongoing maintenance. In contrast, the invention achieves considerable savings.
  • the stationary slide bar according to the invention is lighter in weight and has no moving elements (no rotating mass); therefore only simplified seating is required.
  • An additional important advantage is that the slide bar according to the invention is insensitive to increased temperature and temperature fluctuations.
  • FIG. 1 shows a section of a coating system for a paper or cardboard web with the associated drying device.
  • Figure 2 is a schematic oblique view of a stationary slide bar.
  • Figure 3 shows a complete off-line coating machine.
  • FIG. 4 shows a partial view (in the direction of arrow IV of FIG. 3) of the web with a curved slide bar.
  • FIG. 5 shows a slide bar that can be curved over its length and can also be tilted.
  • FIG. 6 is a cross section along line VI of FIG. 5.
  • a paper or cardboard web 7 runs over web guide rollers 5 into a coating unit 8, from there via further web guide rollers 6 to a drying unit 9 a further web guide roller 12.
  • a part of the web guide rollers 5, 6 and the web guide roller 12 arranged at the end of the drying unit 9 are provided with only symbolically illustrated drives.
  • the individual stationary slide bar 10 is supported on several holders or on a support bar 14.
  • the support bar 14 and the slide bar 10 fastened thereon extend across the entire width B of the web 7.
  • the slide bar 10 has a (seen in cross section) convexly rounded surface 11.
  • the slide bar 10 is made of a simple, cheap steel.
  • the convexly rounded surface 11 is provided with a coating, for example made of a hard metal or ceramic. If necessary, the coated surface 11 is polished smooth. In this way, the surface 11 is insensitive to occasional contact with the running web 7. However, with continuous operation of the system at a relatively high web running speed, contact of the web 7 with the surface 11 of the slide strips 10 is avoided by the bottom side of the web transporting an air boundary layer , so that an aerodynamic lubricating wedge forms on the inlet side of each slide bar 10.
  • An air supply device 13 can only be provided on the inlet side of a slide bar 10, as indicated schematically at 13, for special cases.
  • a special case lies e.g. B. before when the system is started up from standstill or when the web running speed is generally quite low. In some cases it will be sufficient to provide air supply devices only in the area of the two web edges.
  • the arrangement according to Figure 1 is such that the top of the paper web is coated in the coating installation 8 and then dried by the drying unit 9, so that only the uncoated web underside comes into contact with the web guide rollers 6, 12 and occasionally or temporarily with the slide strips 10 is coming.
  • a slide bar can also be arranged on the painted side of the web, e.g. B. if the line thickness is relatively small.
  • the underside of the impact jet dryer 9 is flat. Therefore, the slide strips 10 are arranged such that the web 7 runs along a substantially straight line on the underside of the dryer 9. The web 7 is therefore not (or not significantly) deflected on the slide strips.
  • FIG. 3 This shows a complete off-line coating machine that is suitable for coating relatively thin papers at very high working speeds.
  • several stationary slide rails according to the invention are arranged in positions where previously normal, rotatable guide rollers have usually been arranged.
  • a roll-off station 20 can be seen in FIG. 3, from which the paper web 17 runs to a coating unit 18 for the top of the web and then past infrared dryers 21, through hot air dryers 22 and through a drying cylinder group 23.
  • the web 17 then runs through a second coating unit 18 for the underside of the web, further again past infrared dryers 21, through hot air dryer 22 and through a second drying cylinder group 23, after which the finished coated web is wound up in a roller apparatus 24.
  • the path deflection on each of the stationary slide strips 10 is approximately between 5 degrees and a maximum of approximately 40 degrees. But you can also provide a larger deflection, for. B. in the order of 90 °.
  • Figure 4 it is indicated schematically that a slide bar 10A can be bent approximately parallel to the web running direction. As a result, the paper web 17 can be smoothly pulled transversely to the web running direction or “stretched”. With the help of bending devices, not shown, the extent b of the deflection can be varied.
  • FIGS. 5 and 6 show a slide bar 10B which can be bent out in one direction essentially perpendicular to the paper web 18 or (in other words) arched.
  • the width of the paper web is designated by B in FIG.
  • the following is provided for the purpose of arching the slide bar 10B:
  • the equal bar 10B (and possibly a support bar 14A connected to it) rests on several lifting devices, for example threaded spindles 31. These are evenly distributed over the length of the slide bar and can be individually adjusted.
  • the threaded spindles 31 are supported on a carrier 34 (for example a square tube).
  • a carrier 34 for example a square tube.
  • they can extend across the carrier and can be rotated by means of a handwheel 32 each. In this way, the extent of the curvature (or deflection, for example upwards) can be set as desired.
  • an upwardly curved state of the slide bar is designated as 10C.
  • the carrier 34 which extends parallel to the slide bar, has a pivot pin 35 at each end in the exemplary embodiment shown, with the aid of which it rests in holders 33 (each with a clamping piece 33a).
  • the holders 33 are fastened, for example, on machine side members 36, which rest on stands 37.
  • the spindles 31 extend substantially perpendicular to the paper web 17.
  • the carrier 34 can be pivoted together with the slide bar 10B by a certain angle + a or -a.
  • the angle a can e.g. up to 10 °.
  • a certain spreading effect on the paper or cardboard web can in turn be achieved by the measures described, namely arch adjustment and / or pivoting of the slide bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Paper (AREA)
  • Pens And Brushes (AREA)
  • Sliding-Contact Bearings (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The steel slide strip (10) extends over the whole width (B) of the web (7); has a convex cross-section, and a surface (11) coming into contact with the moving web. Near the side strip is at least one driven guide roller (12) for the web and which produces sufficient speed to form an aerodynamic lubricating wedge effect. The surface of the strip has a coating of hard metal or ceramic and is polished. An oblique blast drying unit (9) is positioned near the slide strip. A wiper unit (8) shapes the web. An air inlet (13) is near the edges of the web.

Description

Die Erfindung betrifft eine stationäre Gleitleiste zum Führen einer laufenden Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn.The invention relates to a stationary slide bar for guiding a running fibrous web, in particular a paper or cardboard web.

Auf die folgenden Veröffentlichungen wird hingewiesen:

D1:
Lehr- und Handbuch "Die Papierfabrikation und ihre Maschinen" von F. Müller, II. Band 1938, Seite 467,
D2:
EP 0 643 168 A1.
Attention is drawn to the following publications:
D1:
Teaching and handbook "Die Papierfabrikation and its machines" by F. Müller, II. Volume 1938, page 467,
D2:
EP 0 643 168 A1.

In der Skizze Nr. 300 der Druckschrift D1 ist im Bereich einer Rollenschneidmaschine eine sogenannte Faltenausstreichleiste dargestellt, welche nach dem Längsschneiden der Papierbahn die Teilbahnen einer Aufwickel-Einrichtung zuführt.Sketch No. 300 of document D1 shows a so-called fold spreading strip in the area of a roll cutting machine, which feeds the partial webs to a winding device after the longitudinal cutting of the paper web.

Aus der Druckschrift D2, Figuren 3-6, sind sogenannte Tragluftbalken bekannt, bestehend aus je einem Hohlprofil-Balken, der auf seiner der Papierbahn zugewandten Seite eine Vielzahl von Blasluft-Bohrungen aufweist. Diese Tragluft-Balken sind in der Regel auf der Auslaßseite einer Bahn-Streichanlage angeordnet, und zwar auf der gestrichenen Seite der Bahn. Unter beträchtlichem Aufwand für das Zufuhren der Blasluft wird dafür gesorgt, daß die frisch gestrichene und also noch feuchte Seite der Papierbahn keinesfalls in direkten Kontakt mit dem Tragluftbalken gelangt.From the document D2, FIGS. 3-6, so-called air support beams are known, each consisting of a hollow profile beam, which has a large number of blown air bores on its side facing the paper web. These air-jet bars are usually arranged on the outlet side of a web coater, on the painted side of the web. With considerable effort for the supply of the blown air, it is ensured that the freshly painted and thus still wet side of the paper web never comes into direct contact with the air bar.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine stationäre Gleitleiste zum Führen einer Papier- oder Kartonbahn derart zu gestalten, daß sie mit möglichst geringem Aufwand herstellbar und in der Regel ohne aktive Luftzufuhr anwendbar ist.The object of the present invention is to design a stationary slide bar for guiding a paper or cardboard web in such a way that it can be produced with as little effort as possible and can generally be used without an active air supply.

Diese Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst. Der Vorteil dieser Maßnahmen besteht darin, daß einerseits die zu führende Bahn vorübergehend oder zeitweise mit der Oberfläche der Gleitleiste in Kontakt kommen kann, daß die Bahn jedoch andererseits bei genügend hoher Laufgeschwindigkeit - dank der Ausbildung eines aerodynamischen Schmierkeiles - meistens berührungslos über die konvex gerundete Oberfläche der Gleitleiste gleitet. Die erfindungsgemäße Gleitleiste ist somit dazu geeignet, vorzugsweise dort eingesetzt zu werden, wo bisher eine drehbare Bahnleitwalze erforderlich ist. Solche Leitwalzen sind nicht nur in der Herstellung kostspielig, sondern bedürfen auch einer laufenden Wartung. Demgegenüber wird durch die Erfindung eine beträchtliche Einsparung erzielt.This object is achieved by the features specified in claim 1. The advantage of these measures is that, on the one hand, the web to be guided can come into contact temporarily or temporarily with the surface of the slide bar, but on the other hand, if the running speed is sufficiently high - thanks to the formation of an aerodynamic lubricating wedge - it is mostly contactless over the convexly rounded surface the slide bar slides. The slide bar according to the invention is therefore suitable for use preferably where a rotatable web guide roller has previously been required. Such guide rollers are not only expensive to manufacture, but also require ongoing maintenance. In contrast, the invention achieves considerable savings.

Verglichen mit herkömmlichen Leitwalzen hat die erfindungsgemäße stationäre Gleitleiste ein geringeres Gewicht und keine beweglichen Elemente (keine rotierende Masse); deshalb wird nur eine vereinfachte Stuhlung benötigt. Ein zusätzlicher wichtiger Vorteil besteht darin, daß die erfindungsgemäße Gleitleiste unempfindlich gegen erhöhte Temperatur und gegen Temperaturschwankungen ist.Compared to conventional guide rollers, the stationary slide bar according to the invention is lighter in weight and has no moving elements (no rotating mass); therefore only simplified seating is required. An additional important advantage is that the slide bar according to the invention is insensitive to increased temperature and temperature fluctuations.

Weitere vorteilhafte Ausgestaltungen der Erfindung und bevorzugte Anwendungen der erfindungsgemäßen Gleitleiste sind in den Unteransprüchen angegeben.Further advantageous embodiments of the invention and preferred applications of the slide bar according to the invention are specified in the subclaims.

In der Zeichnung zeigt die Figur 1 einen Ausschnitt aus einer Streichanlage für eine Papier- oder Kartonbahn mit dazugehörender Trocknungseinrichtung. Die Figur 2 ist eine schematische Schrägansicht einer stationären Gleitleiste. Die Figur 3 zeigt eine komplette Off-line-Streichmaschine.In the drawing, FIG. 1 shows a section of a coating system for a paper or cardboard web with the associated drying device. Figure 2 is a schematic oblique view of a stationary slide bar. Figure 3 shows a complete off-line coating machine.

Die Figur 4 zeigt eine Teilansicht (in Pfeilrichtung IV der Figur 3) auf die Bahn mit einer gebogenen Gleitleiste.FIG. 4 shows a partial view (in the direction of arrow IV of FIG. 3) of the web with a curved slide bar.

Die Figur 5 zeigt eine über ihre Länge wölbbare und außerdem kippbare Gleitleiste.FIG. 5 shows a slide bar that can be curved over its length and can also be tilted.

Die Figur 6 ist ein Querschnitt nach Linie VI der Figur 5.FIG. 6 is a cross section along line VI of FIG. 5.

In Figur 1 läuft eine Papier- oder Kartonbahn 7 über Bahnleitwalzen 5 in ein Streichaggregat 8, von dort über weitere Bahnleitwalzen 6 zu einem Trocknungsaggregat 9. Dort läuft die Bahn entlang der Unterseite des beispielsweise als Prallstrahltrockner ausgebildeten Trocknungsaggregates, gestützt durch stationäre Gleitleisten 10, zu einer weiteren Bahnleitwalze 12. Ein Teil der Bahnleitwalzen 5, 6 und die am Ende des Trocknungsaggregates 9 angeordnete Bahnleitwalze 12 sind mit nur symbolisch dargestellten Antrieben versehen. Gemäß Figur 2 ist die einzelne stationäre Gleitleiste 10 auf mehreren Haltern oder auf einer Stützleiste 14 abgestützt. Die Stützleiste 14 und die darauf befestigte Gleitleiste 10 erstrecken sich quer über die gesamte Breite B der Bahn 7. Die Gleitleiste 10 hat eine (im Querschnitt gesehen) konvex gerundete Oberfläche 11. Vorzugsweise wird die Gleitleiste 10 aus einem einfachen, billigen Stahl gefertigt. Nur die konvex gerundete Oberfläche 11 wird mit einer Beschichtung versehen, beispielsweise aus einem Hartmetall oder aus Keramik. Falls erforderlich, wird die beschichtete Oberfläche 11 glatt poliert. Auf diese Weise ist die Oberfläche 11 unempfindlich gegen gelegentliches Berühren der laufenden Bahn 7. Jedoch wird bei kontinuierlichem Betrieb der Anlage mit relativ hoher Bahnlaufgeschwindigkeit ein Kontakt der Bahn 7 mit der Oberfläche 11 der Gleitleisten 10 dadurch vermieden, daß die Unterseite der Bahn eine Luftgrenzschicht herantransportiert, so daß sich an der Zulaufseite jeder Gleitleiste 10 ein aerodynamischer Schmierkeil ausbildet.In FIG. 1, a paper or cardboard web 7 runs over web guide rollers 5 into a coating unit 8, from there via further web guide rollers 6 to a drying unit 9 a further web guide roller 12. A part of the web guide rollers 5, 6 and the web guide roller 12 arranged at the end of the drying unit 9 are provided with only symbolically illustrated drives. According to Figure 2, the individual stationary slide bar 10 is supported on several holders or on a support bar 14. The support bar 14 and the slide bar 10 fastened thereon extend across the entire width B of the web 7. The slide bar 10 has a (seen in cross section) convexly rounded surface 11. Preferably, the slide bar 10 is made of a simple, cheap steel. Only the convexly rounded surface 11 is provided with a coating, for example made of a hard metal or ceramic. If necessary, the coated surface 11 is polished smooth. In this way, the surface 11 is insensitive to occasional contact with the running web 7. However, with continuous operation of the system at a relatively high web running speed, contact of the web 7 with the surface 11 of the slide strips 10 is avoided by the bottom side of the web transporting an air boundary layer , so that an aerodynamic lubricating wedge forms on the inlet side of each slide bar 10.

Nur für besondere Fälle kann man auf der Zulaufseite einer Gleitleiste 10, wie bei 13 schematisch angedeutet, eine Luft-Zufuhreinrichtung 13 vorsehen. Ein solcher besonderer Fall liegt z. B. vor, wenn die Anlage aus dem Stillstand hochgefahren wird oder wenn die Bahnlaufgeschwindigkeit generell ziemlich niedrig ist. In manchen Fällen wird es ausreichen, nur im Bereich der beiden Bahnränder Luftzuführeinrichtungen vorzusehen.An air supply device 13 can only be provided on the inlet side of a slide bar 10, as indicated schematically at 13, for special cases. Such a special case lies e.g. B. before when the system is started up from standstill or when the web running speed is generally quite low. In some cases it will be sufficient to provide air supply devices only in the area of the two web edges.

Die Anordnung gemäß Figur 1 ist derart getroffen, daß in der Streichanlage 8 die Oberseite der Papierbahn gestrichen und danach durch das Trocknungsaggregat 9 getrocknet wird, so daß nur die ungestrichene Bahnunterseite mit den Bahnleitwalzen 6, 12 sowie gelegentlich oder vorübergehend mit den Gleitleisten 10 in Kontakt kommt. In anderen Fällen kann eine Gleitleiste aber auch auf der gestrichenen Seite der Bahn angeordnet werden, z. B. wenn die Strichdicke relativ gering ist.The arrangement according to Figure 1 is such that the top of the paper web is coated in the coating installation 8 and then dried by the drying unit 9, so that only the uncoated web underside comes into contact with the web guide rollers 6, 12 and occasionally or temporarily with the slide strips 10 is coming. In other cases, a slide bar can also be arranged on the painted side of the web, e.g. B. if the line thickness is relatively small.

Gemäß Figur 1 ist die Unterseite des Prallstrahltrockners 9 eben. Deshalb sind die Gleitleisten 10 derart angeordnet, daß die Bahn 7 auf einer im wesentlichen geradlinigen Strecke an der Unterseite des Trockners 9 entlangläuft. Die Bahn 7 wird deshalb an den Gleitleisten nicht (oder nicht nennenswert) umgelenkt.According to Figure 1, the underside of the impact jet dryer 9 is flat. Therefore, the slide strips 10 are arranged such that the web 7 runs along a substantially straight line on the underside of the dryer 9. The web 7 is therefore not (or not significantly) deflected on the slide strips.

Jedoch ist die erfindungsgemäße Gleitleiste auch für andere Anwendungen geeignet, bei denen sie die zu führende Bahn mehr oder weniger stark umlenken muß. Als Beispiel hierfür sei auf die Figur 3 hingewiesen. Diese zeigt eine komplette Off-line-Streichmaschine, die zum Beschichten relativ dünner Papiere bei sehr hohen Arbeitsgeschwindigkeiten geeignet ist. Darin sind mehrere erfindungsgemäße stationäre Gleitleisten in Positionen angeordnet, wo bisher üblicherweise normale drehbare Leitwalzen angeordnet wurden. Im einzelnen erkennt man in der Figur 3 eine Abrollstation 20, von der die Papierbahn 17 zu einem Streichaggregat 18 für die Bahnoberseite läuft und danach vorbei an Infrarot-Trocknern 21, durch Heißlufttrockner 22 und durch eine Trockenzylindergruppe 23.However, the slide bar according to the invention is also suitable for other applications in which it has to deflect the path to be guided more or less strongly. As an example of this, reference is made to FIG. 3. This shows a complete off-line coating machine that is suitable for coating relatively thin papers at very high working speeds. In it, several stationary slide rails according to the invention are arranged in positions where previously normal, rotatable guide rollers have usually been arranged. In detail, a roll-off station 20 can be seen in FIG. 3, from which the paper web 17 runs to a coating unit 18 for the top of the web and then past infrared dryers 21, through hot air dryers 22 and through a drying cylinder group 23.

Danach läuft die Bahn 17 durch ein zweites Streichaggregat 18 für die Bahnunterseite, ferner wiederum vorbei an Infrarottrocknern 21, durch Heißlufttrockner 22 und durch eine zweite Trockenzylindergruppe 23, wonach die fertig beschichtete Bahn in einem Rollapparat 24 aufgewickelt wird. Wie man sieht, beträgt die Bahn-Umlenkung an jeder der stationären Gleitleisten 10 ungefähr zwischen 5 Grad und maximal etwa 40 Grad. Man kann aber auch eine größere Umlenkung vorsehen, z. B. in der Größenordnung von 90°.The web 17 then runs through a second coating unit 18 for the underside of the web, further again past infrared dryers 21, through hot air dryer 22 and through a second drying cylinder group 23, after which the finished coated web is wound up in a roller apparatus 24. As can be seen, the path deflection on each of the stationary slide strips 10 is approximately between 5 degrees and a maximum of approximately 40 degrees. But you can also provide a larger deflection, for. B. in the order of 90 °.

In Figur 4 ist schematisch angedeutet, daß eine Gleitleiste 10A ungefähr parallel zur Bahnlaufrichtung ausgebogen sein kann. Hierdurch kann man die Papierbahn 17 quer zur Bahnlaufrichtung glatt ziehen oder "breitstrecken". Mit Hilfe von nicht dargestellten Biegevorrichtungen kann das Ausmaß b der Ausbiegung variiert werden.In Figure 4 it is indicated schematically that a slide bar 10A can be bent approximately parallel to the web running direction. As a result, the paper web 17 can be smoothly pulled transversely to the web running direction or “stretched”. With the help of bending devices, not shown, the extent b of the deflection can be varied.

In den Figuren 5 und 6 ist eine Gleitleiste 10B dargestellt, die in einer Richtung im wesentlichen senkrecht zur Papierbahn 18 ausgebogen oder (mit anderen Worten) gewölbt werden kann. Die Breite der Papierbahn ist in Figur 5 mit B bezeichnet. Zum Zwecke des Wölbens der Gleitleiste 10B ist folgendes vorgesehen: Die Gleichtleiste 10B (und gegebenenfalls eine mit ihr verbundene Stützleiste 14A) ruht auf mehreren Hubeinrichtungen, z.B. Gewindespindeln 31. Diese sind über die Länge der Gleitleiste gleichmäßig verteilt und individuell einstellbar. Die Gewindespindeln 31 sind auf einem Träger 34 (z.B. Vierkant-Rohr) abgestützt. Sie können sich z.B., wie dargestellt, quer durch den Träger hindurch erstrecken und können mittels je eines Handrades 32 verdreht werden. Hierdurch kann man das Ausmaß der Wölbung (oder Ausbiegung z.B. nach oben) beliebig einstellen. In Figur 5 ist beispielhaft ein nach oben gewölbter Zustand der Gleitleiste mit 10C bezeichnet.FIGS. 5 and 6 show a slide bar 10B which can be bent out in one direction essentially perpendicular to the paper web 18 or (in other words) arched. The width of the paper web is designated by B in FIG. The following is provided for the purpose of arching the slide bar 10B: The equal bar 10B (and possibly a support bar 14A connected to it) rests on several lifting devices, for example threaded spindles 31. These are evenly distributed over the length of the slide bar and can be individually adjusted. The threaded spindles 31 are supported on a carrier 34 (for example a square tube). For example, as shown, they can extend across the carrier and can be rotated by means of a handwheel 32 each. In this way, the extent of the curvature (or deflection, for example upwards) can be set as desired. In FIG. 5, an upwardly curved state of the slide bar is designated as 10C.

Der sich parallel zur Gleitleiste erstreckende Träger 34 hat beim dargestellten Ausführungsbeispiel an jedem Ende einen Schwenkzapfen 35, mit deren Hilfe er in Haltern 33 (mit je einem Klemmstück 33a) ruht. Die Halter 33 sind beispielsweise auf Maschinen-Längsträgern 36 befestigt, die auf Ständern 37 ruhen. Normalerweise erstrecken sich die Spindeln 31 im wesentlichen senkrecht zur Papierbahn 17. Jedoch kann man mit Hilfe der vorbeschriebenen Bauweise den Träger 34 zusammen mit der Gleitleiste 10B, um einen gewissen Winkel +a oder -a verschwenken. Der Winkel a kann z.B. bis zu 10° betragen. Durch die beschriebenen Maßnahmen, nämlich Bogenverstellung und/oder Verschwenken der Gleitleiste kann wiederum eine gewisse Breitstreckwirkung auf die Papier- oder Kartonbahn erzielt werden.The carrier 34, which extends parallel to the slide bar, has a pivot pin 35 at each end in the exemplary embodiment shown, with the aid of which it rests in holders 33 (each with a clamping piece 33a). The holders 33 are fastened, for example, on machine side members 36, which rest on stands 37. Normally, the spindles 31 extend substantially perpendicular to the paper web 17. However, with the aid of the construction described above, the carrier 34 can be pivoted together with the slide bar 10B by a certain angle + a or -a. The angle a can e.g. up to 10 °. A certain spreading effect on the paper or cardboard web can in turn be achieved by the measures described, namely arch adjustment and / or pivoting of the slide bar.

Claims (20)

Stationäre Gleitleiste (10) zum Führen einer laufenden Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn (7), gekennzeichnet durch die folgenden Merkmale: a) die sich im wesentlichen über die gesamte Bahnbreite (B) erstreckende Gleitleiste (10) hat eine, im Querschnitt gesehen, konvex gerundete und für einen Kontakt mit der laufenden Bahn geeignete Oberfläche (11), b) in der Nachbarschaft der Gleitleiste (10) ist wenigstens eine mit einem Antrieb versehene Bahnleitwalze (12) vorgesehen, die der Bahn (7) eine für die Ausbildung eines aerodynamischen Schmierkeiles ausreichende Laufgeschwindigkeit verleiht. Stationary slide bar (10) for guiding a running fibrous web, in particular a paper or cardboard web (7), characterized by the following features: a) the slide bar (10), which extends essentially over the entire web width (B), has a surface (11) which is convexly rounded in cross section and suitable for contact with the running web, b) in the vicinity of the slide bar (10) there is at least one web guide roller (12) provided with a drive which gives the web (7) a running speed sufficient for the formation of an aerodynamic lubricating wedge. Gleitleiste nach Anspruch 1, dadurch gekennzeichnet, daß sie aus Stahl gefertigt ist.Slide bar according to claim 1, characterized in that it is made of steel. Gleitleiste nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Oberfläche (11) eine Beschichtung aus einem Hartmetall oder aus Keramik aufweist.Slide bar according to claim 1 or 2, characterized in that the surface (11) has a coating of a hard metal or ceramic. Gleitleiste nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Oberfläche (11) poliert ist.Slide bar according to one of the preceding claims, characterized in that the surface (11) is polished. Gleitleiste nach Anspruch 1, dadurch gekennzeichnet, daß sie als ein Kunststoff-Profil ausgebildet ist, welches auf einem Stahl-Tragkörper befestigt ist.Slide bar according to claim 1, characterized in that it is designed as a plastic profile which is attached to a steel support body. Gleitleiste nach Anspruch 5, dadurch gekennzeichnet, daß sie aus einem temperaturbeständigem Kunststoff gefertigt ist.Slide bar according to claim 5, characterized in that it is made of a temperature-resistant plastic. Gleitleiste nach einem der Ansprüche 1-6, dadurch gekennzeichnet, daß sie im Bereich eines Bahn-Trocknungsaggregates (9) angeordnet ist.Slide bar according to one of claims 1-6, characterized in that it is arranged in the region of a web drying unit (9). Gleitleiste nach einem der Ansprüche 1-6, dadurch gekennzeichnet, daß sie im Bereich eines zum Trocknen der Bahn (7) dienenden Prallstrahltrockners (9) angeordnet ist.Slide bar according to one of claims 1-6, characterized in that it is arranged in the region of an impact jet dryer (9) which serves to dry the web (7). Gleitleiste nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie im Bereich eines zum Veredeln der Bahn (7) dienenden Streichaggregats (8 oder 18) angeordnet ist.Slide bar according to one of the preceding claims, characterized in that it is arranged in the region of a coating unit (8 or 18) used for finishing the web (7). Gleitleiste nach Anspruch 9, dadurch gekennzeichnet, daß sie auf der ungestrichenen Seite der Bahn (7 oder 17) angeordnet ist.Slide bar according to claim 9, characterized in that it is arranged on the uncoated side of the web (7 or 17). Gleitleiste nach Anspruch 9, dadurch gekennzeichnet, daß sie auf der gestrichenen Seite der Bahn angeordnet ist.Slide bar according to claim 9, characterized in that it is arranged on the painted side of the web. Gleitleiste nach einem der vorausgehenden Ansprüche, dadurch gekennzeichnet, daß auf ihrer Zulaufseite eine Luft-Zuführeinrichtung (13) vorgesehen ist.Slide bar according to one of the preceding claims, characterized in that an air supply device (13) is provided on its inlet side. Gleitleiste nach Anspruch 12, dadurch gekennzeichnet, daß nur im Bereich der Bahn-Ränder je eine Luft-Zuführeinrichtung (13) vorgesehen ist.Slide bar according to claim 12, characterized in that an air supply device (13) is provided only in the region of the web edges. Gleitleiste nach einem der Ansprüche 1 bis 13, gekennzeichnet durch eine derartige Anordnung, daß die Bahn (7) im wesentlichen ohne Umlenkung an der Gleitleiste vorbeiläuft.Slide bar according to one of claims 1 to 13, characterized by such an arrangement that the web (7) passes the slide bar essentially without deflection. Gleitleiste nach einem der Ansprüche 1 bis 13, gekennzeichnet durch eine derartige Anordnung, daß die Bahn (17) beim Lauf über die Gleitleiste umgelenkt wird.Slide bar according to one of claims 1 to 13, characterized by such an arrangement that the web (17) is deflected when running over the slide bar. Gleitleiste nach Anspruch 15, dadurch gekennzeichnet, daß der Umlenkwinkel zwischen 2 und 120 Grad, vorzugsweise zwischen 5 und 40 Grad beträgt.Slide bar according to claim 15, characterized in that the deflection angle is between 2 and 120 degrees, preferably between 5 and 40 degrees. Gleitleiste (10B) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie auf mehreren, über ihre Länge verteilten und individuell einstellbaren Hubeinrichtungen, z.B. Gewindespindeln (31) ruht, die auf einem Träger (34) abgestützt sind (Figur 5, 6 ).Slide bar (10B) according to one of the preceding claims, characterized in that it is provided on a plurality of individually adjustable lifting devices, e.g. Threaded spindles (31) are resting, which are supported on a carrier (34) (FIGS. 5, 6). Gleitleiste nach Anspruch 17, dadurch gekennzeichnet, daß sie mittels der Hubeinrichtungen (31) über ihre Länge in beliebigem Ausmaß in Richtung zur Bahn (17) gewölbt werden kann.Slide bar according to claim 17, characterized in that it can be arched in any direction along the length by means of the lifting devices (31) in the direction of the track (17). Gleitleiste nach Anspruch 17 oder 18, dadurch gekennzeichnet, daß sie zusammen mit dem Träger (34) um eine zu ihrer Längserstreckung parallele Achse (35) schwenkbar ist.Slide bar according to claim 17 or 18, characterized in that it can be pivoted together with the carrier (34) about an axis (35) parallel to its longitudinal extent. Gleitleiste (10A) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie im wesentlichen parallel zur Bahnlaufrichtung ausgebogen oder ausbiegbar ist (Figur 4.).Slide bar (10A) according to one of the preceding claims, characterized in that it is bent or bendable substantially parallel to the direction of web travel (Figure 4.).
EP96107713A 1995-05-20 1996-05-15 Device for guiding a fibrous web comprising a stationary slide rail Expired - Lifetime EP0744366B1 (en)

Applications Claiming Priority (2)

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DE29508421U 1995-05-20
DE29508421U DE29508421U1 (en) 1995-05-20 1995-05-20 Stationary slide bar

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EP0744366A2 true EP0744366A2 (en) 1996-11-27
EP0744366A3 EP0744366A3 (en) 1997-10-29
EP0744366B1 EP0744366B1 (en) 2002-08-21

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EP (1) EP0744366B1 (en)
CN (1) CN1136616A (en)
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Also Published As

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US5855672A (en) 1999-01-05
CA2176872A1 (en) 1996-11-21
DE59609569D1 (en) 2002-09-26
CN1136616A (en) 1996-11-27
US6174368B1 (en) 2001-01-16
EP0744366A3 (en) 1997-10-29
DE29508421U1 (en) 1995-09-14
US6402842B1 (en) 2002-06-11
ATE222560T1 (en) 2002-09-15
EP0744366B1 (en) 2002-08-21

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