EP0412255B1 - Heizvorrichtung für eine Wellpappenanlage - Google Patents

Heizvorrichtung für eine Wellpappenanlage Download PDF

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Publication number
EP0412255B1
EP0412255B1 EP90110532A EP90110532A EP0412255B1 EP 0412255 B1 EP0412255 B1 EP 0412255B1 EP 90110532 A EP90110532 A EP 90110532A EP 90110532 A EP90110532 A EP 90110532A EP 0412255 B1 EP0412255 B1 EP 0412255B1
Authority
EP
European Patent Office
Prior art keywords
section according
pressure
conveyor belt
corrugated cardboard
pressure hood
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
EP90110532A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0412255A1 (de
Inventor
Andreas Dipl.-Ing. Knorr
Michael Dr.-Ing. Saller
Hans Ing. Mosburger
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.)
BHS Corrugated Maschinen und Anlagenbau GmbH
Original Assignee
BHS Bayerische Berg Hutten und Salzwerke AG
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 BHS Bayerische Berg Hutten und Salzwerke AG filed Critical BHS Bayerische Berg Hutten und Salzwerke AG
Publication of EP0412255A1 publication Critical patent/EP0412255A1/de
Application granted granted Critical
Publication of EP0412255B1 publication Critical patent/EP0412255B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2877—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts
    • B31F1/2881—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts for bringing a second facer sheet into contact with an already single faced corrugated web

Definitions

  • the invention relates to a heating section for a corrugated cardboard system with the features of the preamble of claim 1.
  • Such a heating section for a corrugated cardboard system is known from DE-OS 34 10 829.
  • the disadvantage here is that the air is pressed through the conveyor belt and a kind of air lubrication occurs between the conveyor belt and the corrugated cardboard to be conveyed. This reduces the conveying effect of the conveyor belt.
  • the air pressed into the conveyor belt prevents the absorption of water vapor, which is emitted by the heated corrugated cardboard.
  • the invention has for its object to improve a heating section for a corrugated cardboard system so that the conveying effect of the conveyor belt and the absorption capacity for water vapor emerging from the corrugated cardboard is maintained.
  • a wear-free seal between the underside of the pressure hood and the top of the conveyor belt should be achieved with little or no leakage.
  • this separating means is formed by an air-impermeable endless belt moved with the conveyor belt or the corrugated cardboard, no relative movement occurs between the conveyor belt and the separating means. There is a reduction in wear.
  • the lower edges of the pressure hood are bent inwards, a good and low-wear sealing against the separating agent is achieved.
  • the heating section 1 of a corrugated cardboard system has a plurality of heating plates 2, one behind the other. Its flat surface forms a heating surface 3 for the conveyed in the direction of arrow I, e.g. single corrugated cardboard 4.
  • the heating plates 2 can extend in the transverse direction to the corrugated cardboard 4 over the maximum width. However, they can also be divided and controlled to different temperatures in the transverse direction.
  • a one-sided corrugated cardboard 5 coming from a single-sided corrugated cardboard machine is fed to the heating section 1.
  • the crests of the corrugations of the one-sided corrugated cardboard 5 are provided with glue.
  • a smooth cover sheet 6 is fed to the underside. By applying pressure, the cover sheet 6 is glued to the one-sided corrugated cardboard 5 and dried by the heating section 1.
  • an endless conveyor belt 8 which runs over deflection or drive rollers 9.
  • the lower run 10 runs in a plane parallel to the heating surface 3 and at such a distance that it bears against the upper cover sheet 11 and takes the corrugated cardboard 7 with it through a corresponding friction effect.
  • a pressure hood 12 is provided to increase the friction effect and the heat transfer from the heating surface 3 to the corrugated cardboard 4.
  • This pressure hood 12 has a housing 13 which, as can be seen in FIG. 2, is rectangular in cross section.
  • the top 14 is flat. It runs parallel to the heating surface 3.
  • the adjoining side surfaces 15 have edges 16 and 17 which are bent inwards.
  • the front and back also have inwardly curved edges, not shown.
  • the housing 13 is arranged fixed in space, not shown. It can be raised and lowered for additional and setting purposes, optionally controlled.
  • the ends of the housing 13 can have semicircular surfaces 18, 19. These surfaces can also be formed by tubes 20, 21, with which the side surfaces 15 are firmly connected.
  • rollers can also be provided which are freely rotatably mounted or driven.
  • An endless belt 25 runs over the surfaces 18, 19 and the top 14 of the housing 13.
  • This can consist of air-impermeable material. It is flexible and preferably elastic. For example, a thin plastic or metal band can be used for this band.
  • the lower strand 26 of the circulating belt 25 is pressed with its underside against the upper side of the lower strand 26 of the conveyor belt 8 by the excess pressure prevailing in the interior 27 of the housing 13, which is generated, for example, by a pump (not shown).
  • the inwardly bent edges 16, 17 seal against the top of the endless belt 25.
  • the distance between the edges 16, 17 is smaller than the width of the endless belt 25.
  • the width of this endless belt 25 is equal to or smaller than the width of the conveyor belt 8, which extends in one piece over the maximum width of the heating surface 3. It consists of an air- and vapor-permeable material, so that the vapors produced by the heating through the heating surface 3, emitted by the corrugated cardboard 4 upwards, can be absorbed by this conveyor belt or can escape through it.
  • the lower run 26 of the endless belt 25 ensures that air can escape from the housing 13 of the pressure hood 12 only as a leak via the sealing connection with the inwardly bent edges 16, 37. As far as possible, no air should flow through the endless belt 12. Air lubrication of the conveyor belt 8 is thus avoided.
  • the endless belt 25 has transverse ribs 25 'on its outside, that is to say at the lower run 26 towards the top of the corrugated cardboard 4, preferably in a herringbone pattern. This makes it possible for the vapors emerging upwards from the conveyor belt 8 to evaporate laterally via the channels which run between the profiles 25 'and run transversely to the corrugated cardboard web.
  • a small gap can be provided between the upper side of the lower run 26 of the endless belt 25 and the edges 16, 17 of the housing 13. This avoids the friction between the endless belt 25 and the housing 13. The leakage occurring is so low that the pressure in the interior can be easily maintained.
  • the gap size can also be used to regulate the pressure in the pressure hood. In addition, this makes it possible to exchange air in the pressure hood, thus allowing hot air to escape from it.
  • the edges 16, 17 are then pulled further inwards. These ends are perforated with holes 28, via which internal air from the interior 27 presses against the top of the endless belt 25.
  • the underside of the housing 13 can be provided with a bottom 29 as a closed surface. This has a multiplicity of holes 28.
  • pressure hoods 12 are present in the running direction of the single-wall corrugated cardboard 4 at a distance from one another.
  • a single endless belt 25 is assigned to these printing hoods 12.
  • This floor 29 can be made of a material which, in cooperation with the conveyor belt 8, causes little friction.
  • the bottom 29 can also be connected to the pressure housing 13 such that it can move in height, for example via membrane beads or the like. It would also be possible to use this base 29 in the manner of a height-movable piston in the pressure housing 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Drying Of Solid Materials (AREA)
EP90110532A 1989-08-10 1990-06-02 Heizvorrichtung für eine Wellpappenanlage Expired - Lifetime EP0412255B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926483A DE3926483C1 (enExample) 1989-08-10 1989-08-10
DE3926483 1989-08-10

Publications (2)

Publication Number Publication Date
EP0412255A1 EP0412255A1 (de) 1991-02-13
EP0412255B1 true EP0412255B1 (de) 1993-07-14

Family

ID=6386897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110532A Expired - Lifetime EP0412255B1 (de) 1989-08-10 1990-06-02 Heizvorrichtung für eine Wellpappenanlage

Country Status (2)

Country Link
EP (1) EP0412255B1 (enExample)
DE (2) DE3926483C1 (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212847A1 (de) * 1992-04-16 1993-11-18 Bhs Bayerische Berg Heizvorrichtung für eine Wellpappenanlage
DE19536007A1 (de) * 1995-09-28 1997-04-03 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn
DE19716716C2 (de) * 1997-04-21 2002-04-18 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine Wellpappenanlage
DE19810841C2 (de) * 1998-03-12 2002-03-14 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine Wellpappenanlage
DE19857370C2 (de) * 1998-12-11 2002-01-24 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine Wellpappenanlage
DE19954754A1 (de) * 1999-11-15 2001-05-17 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine Wellpappemaschine
GB0423068D0 (en) * 2004-10-16 2004-11-17 Simon Corrugating Machinery Lt Heat transfer system
WO2010005279A1 (en) * 2008-07-07 2010-01-14 Chee Meng Chan Corrugated board production belt lifting device
IT1402843B1 (it) * 2010-12-06 2013-09-27 Fosber Spa "dispositivo per la produzione di cartone ondulato e relativo metodo"

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140030A (en) * 1962-04-26 1964-07-07 Koppers Co Inc Vacuum device for pulling a continuous web
GB1046813A (en) * 1964-04-01 1966-10-26 Niwa Machinery Co Ltd Pressing and drying devices for corrugated board manufacturing equipment
DE1561493A1 (de) * 1967-04-17 1970-03-05 Koppers Co Inc Vorrichtung fuer die Herstellung von Wellpappe
GB1179908A (en) * 1967-05-31 1970-02-04 Koppers Co Inc Improvements in or relating to apparatus for use in the production of corrugated board.
DE2205568A1 (de) * 1972-02-07 1973-08-16 Eickhoff Universal Wellpappenm Verfahren und vorrichtung zum belasten einer mit doppelseitiger glatter deckbahn ausgestatteten wellpappenbahn in der heiz- und/oder kuehlpartie einer wellpappenmaschine
DE2310613C3 (de) * 1973-03-02 1976-01-08 Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen Vorrichtung zum Andrücken einer bewegten Materialbahn, insbesondere Wellpappenbahn, an eine stationäre, insbesondere als Heizpartie ausgebildete Abstützfläche
DE2648088A1 (de) * 1976-10-23 1978-05-03 Karl Schilf Verfahren und vorrichtung zur kontinuierlichen herstellung von ein- bzw. mehrschichtigen flaechigen materialien
GB8308645D0 (en) * 1983-03-29 1983-05-05 Neu Eng Ltd Corrugated board

Also Published As

Publication number Publication date
DE59001955D1 (de) 1993-08-19
DE3926483C1 (enExample) 1991-01-31
EP0412255A1 (de) 1991-02-13

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