EP0507218B1 - Dryer section - Google Patents

Dryer section Download PDF

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Publication number
EP0507218B1
EP0507218B1 EP92105274A EP92105274A EP0507218B1 EP 0507218 B1 EP0507218 B1 EP 0507218B1 EP 92105274 A EP92105274 A EP 92105274A EP 92105274 A EP92105274 A EP 92105274A EP 0507218 B1 EP0507218 B1 EP 0507218B1
Authority
EP
European Patent Office
Prior art keywords
material
length
coating device
characterized
device according
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
EP92105274A
Other languages
German (de)
French (fr)
Other versions
EP0507218A1 (en
Inventor
Rudolf Beisswanger
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.)
JM Voith GmbH
Original Assignee
JM Voith 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
Priority to DE4110875 priority Critical
Priority to DE4110875A priority patent/DE4110875A1/en
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0507218A1 publication Critical patent/EP0507218A1/en
Application granted granted Critical
Publication of EP0507218B1 publication Critical patent/EP0507218B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/02Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00Advancing webs
    • B65H20/14Advancing webs by direct action on web of moving fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00Drying solid materials or objects by processes involving the application of heat
    • F26B3/28Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00Means using fluid
    • B65H2406/10Means using fluid made only for exhausting gaseous medium
    • B65H2406/11Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar

Description

  • The invention relates to a coating device according to the preamble of claim 1. Such a coating device has become known from CA-A-2 026 098.
  • Individual elements of such a coating device are known. For example, EP 0 236 819 shows and describes a deflection device for contactless deflection of a web; this device has a rigid, box-shaped, bar-shaped air blowing device with air blowing elements. DE 39 10 898 A1 shows a coating device, which is connected downstream of a drying section, with a floating and infrared radiation dryer.
  • All these known devices have the disadvantage that the paper webs treated with them tend to curl and wrinkle; the waves run in the transverse direction of the web.
  • The invention has for its object to design a coating device according to the preamble of claim 1 such that the web waviness in the transverse direction is significantly reduced and the formation of wrinkles is excluded.
  • This object is solved by the characterizing features of claim 1.
  • In order to fix the course of the web better, a bar-shaped box-like blowing device can be provided in front of the deflection device, which blows air jets directed against the outside of the web boss onto the web.
  • This bar-shaped device can preferably be curved, and in addition a stronger blowing effect is generated at the center of the web than at the edges of the web, so that the web receives a greater deflection in the middle than in the edges and thereby produces a spreading effect.
  • Furthermore, it is also appropriate that the drying is carried out to a large extent, with the infrared radiation dryer and the floating dryer alternating, an optimal, maximum drying being able to be achieved in the shortest distance.
  • An alternating arrangement of levitation and infrared dryers is known from EP 0291832, but not for the purpose of web smoothing by undulating web guidance according to the invention. The floating dryers are therefore also deliberately designed in such a way that the web is not undulated, but is guided at a very precise distance from the infrared dryers in order to optimally utilize their heating power. A floating dryer is arranged after each infrared dryer to remove the water vapor that forms under each infrared dryer. The dryers are only assigned to one side of the web.
  • The invention provides a longitudinal stiffness (waves in the longitudinal direction of the web) during the initial drying - that is, before the after-drying group formed with drying cylinders - a stiffness in the transverse direction of the web, so that the ripple in the transverse direction of the web is reduced and wrinkles are avoided.
  • The invention is explained below on the basis of the exemplary embodiments illustrated in the figures, wherein
    • FIGS. 1, 2 and 5 basic sketches of three overall arrangements,
    • Figures 3 and 4 show schematic diagrams of two non-contact, air-based web deflection devices.
  • In Fig. 1 the web B is passed through a coating device which e.g. has two press rolls 12 and 13, each of which is assigned an application device for coating compound (coating slip) 51 and 52, respectively. The direction of the vertical is indicated here by V and extends essentially parallel to the long edges of the drawing sheet. At an angle between 25 ° and 45 °, the web is guided downward after the coating device and first reaches an air pressure-based web stabilization device 6 and also an air-based web deflection device 2 which has blowing nozzles 21 arranged next to one another in an arc. Due to the web tension and the air pressure of the blowing air of the web deflection device 2, the web is continued in a contactless manner and first reaches a floating drying device 3, which also shows blowing devices 23. On the other hand, there is also a similar levitation drying device 3 '. The blowing devices 23 of the two levitation drying devices are arranged offset with respect to one another, so that the web takes on a sinusoidal shape, as is known. The temperature of the blowing air is between 150 ° and 300 °, but in this case it can also be at room temperature. In this case, of course, this is not a floating drying device but simply a floating web guiding device. However, it is also preferred to work with considerably warmed air here, so that the web is already dried.
  • The blowing devices have lateral slots for the exit of the air, which run next to the pressure surfaces 31 for the air cushion. Air is removed again between the blowing devices (see US 4,833,794).
  • The wave-shaped guidance of the web in this area is intended to prevent the waves generated by the transverse shrinkage of the web which is relatively moist after the coating device from enlarging or forming into folds. Also by the action of the web stabilizer 6 and the non-contact web deflection device 2, this ripple based on the expansion of the web is to be greatly reduced in the transverse direction. Subsequent to the float dryer 3, 3 'an infrared drying unit 4' is provided, to which in turn float dryer 3˝, 3 '' 'connect with blowing devices arranged offset in the course of the web. This blowing device is essentially designed as a box or bar-shaped. These drying devices are known, e.g. from US 4,833,794. The contactless web deflection device 2 is known from EP 0236819 A1.
  • The ripple of the web in the levitation dryer 3, 3 'or 3˝ or the sine wave should have a length between 20 and 60 cm, preferably between 20 and 40 cm.
  • In Fig. 2 it is indicated that floating drying units 3 and infrared units 4 are arranged alternately, the final infrared unit with I₂ and the last floating drying unit with S₂ are designated. The web is then deflected on a spreader roller 16 and guided to the first drying cylinder 15, to which further drying cylinders are connected in a known manner. The angle at which the web is guided upwards after the deflection is preferably between 40 and 65 ° to the vertical V.
  • The first blowing device 23 of the floating outer device blows radially from the outside against the convex side of the web B, so that the web - or its course - is also well fixed at the end of the arch.
  • In Figure 3 it is shown that the non-contact web deflection device 2 is curved so that the web is deflected further in the middle of the deflection sheet than towards the edge of the web. Furthermore, the blowing pressures in the middle are chosen to be greater than towards the edge, so that the web assumes the shape indicated by the dash-dotted lines. This additionally improves the effect of reducing the wave formation of the web transverse to the course of the web and eliminating the formation of wrinkles. The curvature is of course exaggerated here.
  • You can also use either one or the other measure. The difference in blowing pressures between the center and the edge should be approximately 20% and the curvature of the web deflection device should be between 5 and 10 times the web width.
  • The deflecting device 2˝ with blowing nozzles according to FIG. 4 also has blowing devices 21 ′ radially on the outside of the web bend; if hot air is used in this case, the web drying can begin here, on both sides.
  • The above effect is achieved by stretching the web in this case, and another purpose of this arrangement is to stabilize the web even more.
  • 5, the overall arrangement is sketched in practice, the preferred arrangement being chosen because of the removal of the moisture so that the last heating dryer 68 before the first drying roller 15 of the subsequent drying roller group is a floating dryer.
  • The floating dryers are numbered 66 to 68 and 66 'to 68', the infrared dryer 69 and 70, storage chairs for the coating rollers 12 and 13 with 61 and 62 and the machine base with 63. The contactless deflection device 2 is mounted on the machine foundation by means of bearings 64.

Claims (9)

  1. A coating device (12, 13) for paper or cardboard, followed by a rigid beamshaped boxlike diverting mechanism (2) comprising blower elements (21), which produce a compressed gas guiding cushion for the length of material for contact-free diversion of the route at an angle between 50° and 120°, so that the length of material also distances itself, during an increase of distance from the diverting device (2), from the coating device (12, 13), and a heating device (3, 3′) adjacent the diverting device (2) or a beamshaped boxlike suspension mechanism (3, 3′) with beamshaped boxlike air blowing devices, at the top and bottom side of the length of material, characterized in that that the heating device or the suspension mechanism generates a route of a length of material which undulates in the movement direction of a length of material (transversely extending wave troughs and wave peaks), and that there-behind additional driers (4, 3˝) in the form of infrared driers (4, 4′) and suspension driers (3, 3′) alternate with each other at least twice.
  2. A coating device according to claim 1, characterized in that the arclike supported side of a length of material is arranged opposite at least one beamshaped boxlike air blower element with air jets or air screens directed externally towards the length of material in the movement direction of a length of material and essentially ahead of the first blower element (21).
  3. A coating device according to claim 1 or 2, characterized in that the last drier ahead of following drier cylinders (15) is a suspension drier, and at least the first, or preferably all suspension driers (3, 3′, 3˝, 3′′′; 66, 67; 68) are designed for undulating guiding of a length of material.
  4. A coating device according to claim 1 to 3, characterized in that the beamshaped air ducting device (6) arranged in front of the diverting mechanism (2), as seen in the movement direction of a length of material, causes by way of the gas jets in the movement direction of the length of material a wave in the length of material at the beginning of the diverting mechanisms (2).
  5. A coating device according to claim 4, characterized in that the beamshaped air ducting device (6) has a blow-pressure intensity of the air jets which gradually reduces from the centre of the length of material towards the edges of the latter and/or is curved after an analog course over the width of the length of material.
  6. A coating device according to one of claims 2 to 5, characterized in that the suspension guiding mechanism (3), which is behind the diverting mechanism (2) and positioned on the inside of the arc of the length of material, forms with the first mentioned, at least with respect to the one side of the length of material, a structural unit, or that it is structurally associated therewith in such a manner that the first air blowing mechanism (23) together with the other suspension device, which is arranged on the outside of the arc, produces immediately adjacent thereto a wavy arc of opposite curvature from the arc.
  7. A coating device according to one of claims 1 to 6, characterized in that the length of material is initially guided after the coating device from top to bottom, and after the diverting mechanism (2) from bottom to top.
  8. A coating device according to one of claims 1 to 7, characterized in that behind the drier is provided a width stretching roller (16) followed by the first (15) of a series of drying cylinders, that the material tensions in the area between the coating device (12, 13) and the width stretching roller (16) are severely reduced and increase severely only after the drying cylinder (15).
  9. A coating device according to one of claims 1 to 8, characterized in that the heating devices are passed through by the length of material in an inclining line.
EP92105274A 1991-04-04 1992-03-27 Dryer section Expired - Lifetime EP0507218B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4110875 1991-04-04
DE4110875A DE4110875A1 (en) 1991-04-04 1991-04-04 Dry lot

Publications (2)

Publication Number Publication Date
EP0507218A1 EP0507218A1 (en) 1992-10-07
EP0507218B1 true EP0507218B1 (en) 1995-05-17

Family

ID=6428801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105274A Expired - Lifetime EP0507218B1 (en) 1991-04-04 1992-03-27 Dryer section

Country Status (9)

Country Link
US (1) US5230165A (en)
EP (1) EP0507218B1 (en)
AT (1) AT122778T (en)
BR (1) BR9201333A (en)
CA (1) CA2065180A1 (en)
DE (1) DE4110875A1 (en)
ES (1) ES2072648T3 (en)
FI (1) FI107623B (en)
NO (1) NO921305L (en)

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TW332007U (en) * 1993-06-22 1998-05-11 Ciba Geigy Corp Continuous drier for board-shaped Continuous piece material and coating installation comprising such a continuous drier
EP0643168B1 (en) * 1993-08-07 1998-01-14 J.M. Voith GmbH Apparatus for coating a paper web
EP0643167A1 (en) * 1993-08-07 1995-03-15 J.M. Voith GmbH Device for coating a paper web
AT162251T (en) * 1993-08-07 1998-01-15 Voith Gmbh J M Device for coating a paper rail
FR2710971B1 (en) * 1993-10-06 1995-12-29 Infra Rouge System Non-contact deflection device for sheet material.
US5447566A (en) * 1993-12-27 1995-09-05 Autographic Business Forms, Inc. Paper coating and drying machine
DE4415581C2 (en) * 1994-05-04 1995-12-07 Voith Gmbh J M Paper coating device
DE4416399C2 (en) * 1994-05-09 1999-04-01 Voith Gmbh J M Drying device for a running material web
US5573593A (en) * 1995-01-17 1996-11-12 Beloit Technologies, Inc. Coating apparatus for selectively coating either or both sides of a traveling paper web
US5570519A (en) * 1995-02-10 1996-11-05 Valmet Corporation Method and device in contact-free treatment of a web
DE29508421U1 (en) * 1995-05-20 1995-09-14 Voith Sulzer Papiermasch Gmbh Stationary slide bar
FI98944C (en) * 1995-10-25 1997-09-10 Valmet Corp Method and apparatus for drying the coating of a paper web or equivalent
DE19634448C2 (en) * 1996-08-26 1999-06-24 Voith Sulzer Papiermasch Gmbh Method and device for applying a liquid or pasty medium to a running material web
DE19732138A1 (en) * 1996-08-26 1999-01-28 Voith Sulzer Papiermasch Gmbh Process for coating moving web of material with liquid or paste
FI108243B (en) 1997-01-27 2001-12-14 Metso Paper Inc Paper Coating Arrangement and Method for Coating Paper
US5906862A (en) * 1997-04-02 1999-05-25 Minnesota Mining And Manufacturing Company Apparatus and method for drying a coating on a substrate
FI114933B (en) 1997-07-07 2005-01-31 Metso Paper Inc Method and apparatus for drying a coated paper web or the like
CN1123522C (en) 1998-12-23 2003-10-08 巴赫芬和迈耶机械制造股份公司 Device for guiding or treating a continuous line of material in contactless manner, especially a line of paper or cardboard or metal or plastic film
AT409301B (en) * 2000-05-05 2002-07-25 Ebner Peter Dipl Ing Device for guiding a metal strip on a gas pillow
EP1327115A1 (en) * 2000-10-17 2003-07-16 STARLINGER & CO. GESELLSCHAFT MBH Device and method for the drying of plastic webs
EP1245732B1 (en) * 2001-03-26 2007-07-18 Voith Patent GmbH Apparatus for coating moving webs, in particular paper webs and carton webs
US6634120B2 (en) 2001-03-26 2003-10-21 Voith Paper Patent Gmbh Apparatus for coating moving fiber webs
DE10254777A1 (en) * 2002-11-22 2004-06-03 Voith Paper Patent Gmbh Guide for moist moving paper web has aerodynamic profile with leading edge and trailing edge either side of a thick zone
FI121931B (en) * 2003-05-08 2011-06-15 Metso Paper Inc A method for treating surface-glued paper, especially fine paper, in a paper machine finishing section and a paper machine finishing section
DE10335581A1 (en) * 2003-07-31 2005-02-24 Voith Paper Patent Gmbh Device for guiding and drying a running fibrous web
DE10359113A1 (en) * 2003-12-17 2005-07-21 Voith Paper Patent Gmbh Width stretching machine has adjustable gas pad between arched material length and stretching device, and curved length guide element
DE102004004154A1 (en) * 2004-01-28 2005-08-18 Voith Paper Patent Gmbh Application process
GB0523013D0 (en) * 2005-11-11 2005-12-21 Conductive Inkjet Tech Ltd Handling of flexible planar material
FI120368B (en) * 2007-10-25 2009-09-30 Metso Paper Inc A method and arrangement for adjusting the properties of a fiber web
CN101639312B (en) * 2008-08-01 2011-03-30 上海比亚迪有限公司 Pole piece drying equipment and drying method
JP5529089B2 (en) * 2011-08-29 2014-06-25 富士フイルム株式会社 Recording medium conveying apparatus and image forming apparatus
DE102012201910B3 (en) * 2012-02-09 2013-01-31 Voith Patent Gmbh Apparatus for treating a running paper, cardboard or other fibrous web
CN103264011B (en) * 2013-06-05 2015-01-14 深圳市浩能科技有限公司 Oven air chamber structure provided with buffering area
KR101709760B1 (en) * 2014-06-03 2017-02-23 얼라이드레이테크놀로지 주식회사 Hardening apparatus and method for coating on plate, and Near infrared ray heating apparatus therefor
FI126242B (en) * 2015-01-14 2016-08-31 Takso-Ohjelmistot Oy The method and arrangement for threading of the fibrous web and the threading apparatus
EP3260802B1 (en) 2016-06-23 2019-10-09 Valmet Technologies Oy Nozzle for a device for contact-free treatment of a running fiber web

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Also Published As

Publication number Publication date
FI921429A (en) 1992-10-05
NO921305D0 (en) 1992-04-03
FI921429D0 (en)
FI921429A0 (en) 1992-04-01
DE4110875A1 (en) 1992-10-08
NO921305L (en) 1992-10-05
AT122778T (en) 1995-06-15
EP0507218A1 (en) 1992-10-07
ES2072648T3 (en) 1995-07-16
CA2065180A1 (en) 1992-10-05
FI107623B1 (en)
BR9201333A (en) 1992-12-01
US5230165A (en) 1993-07-27
FI107623B (en) 2001-09-14

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