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EP1643034A1 - Coucheuse - Google Patents

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Publication number
EP1643034A1
EP1643034A1 EP05108899A EP05108899A EP1643034A1 EP 1643034 A1 EP1643034 A1 EP 1643034A1 EP 05108899 A EP05108899 A EP 05108899A EP 05108899 A EP05108899 A EP 05108899A EP 1643034 A1 EP1643034 A1 EP 1643034A1
Authority
EP
European Patent Office
Prior art keywords
splash guard
roller
application
bearing housing
fibrous web
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.)
Withdrawn
Application number
EP05108899A
Other languages
German (de)
English (en)
Inventor
Horst Kaipf
Michael Otto
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 Patent GmbH
Voith Paper Patent 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 Patent GmbH, Voith Paper Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1643034A1 publication Critical patent/EP1643034A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper

Definitions

  • the invention relates to a device for one or two-sided application of liquid to pasty application medium on a running paper, board or other fibrous web in their manufacture or refinement, with at least one application unit and at least one roller to support the fibrous web in direct order or Recording and transmission of the coating medium on the fibrous web in indirect application, wherein the rotating roller has at its two ends each have a roll neck, which is received in each case spaced from the front end of the roller in a bearing housing, which in turn is supported in a support frame of the applicator.
  • the application of the coating medium on the fibrous web takes place as already stated, either directly, wherein the fibrous web is supported by a so-called counter-roller, or the application is carried out in an indirect manner first to a so-called application roller, which then transfers the application medium to the fibrous web.
  • a simultaneous indirect application takes place on both sides of the web at the same time, to which both application rollers form a nip with each other, which passes through the fibrous web.
  • the affected areas must be cleaned consuming and in short cycles.
  • DE 1 02 5212 A1 describes a shielding arrangement which is arranged around the area of the complete application device.
  • the invention has for its object to provide a device by which the immediate and wider environment of the application unit better than before can be kept free of dirt and can be extended by the cleaning cycles.
  • the inventors have recognized that the medium mist sprayed off during the application process, which originates, for example, from a medium predosing or from the roll nip or from water droplets from edge moistening nozzles, especially in the lateral direction on the roll neck in the area between the bearing housing and the front end of the roll (per web or web) Machine side or leader and drive side)) and thereby lead to poor running properties of the roller.
  • You have also recognized that these precipitating particles are thrown off the rotating roll neck due to the strong centrifugal forces undefined, whereby a significant impairment of especially the bearing housing and the adjacent support or squeegee beams of the applicator occurs.
  • the object is therefore achieved in that the area of the roll neck between the end face of the roll and the bearing housing is covered with a splash guard.
  • the location which propagates the sprays is advantageously encapsulated.
  • the closer environment, such as the sensitive bearing housing and the wider environment, such as operating walkways and web guide elements can thus be protected from contamination. Therefore, the cleaning cycles can be shortened considerably. This is all the more advantageous, especially since the cleaning is associated with a standstill of the device, which leads to production failure, which you want to avoid, of course.
  • Said roll neck may be part of a so-called counter roll.
  • a backing roll which can also be referred to as a backup roll
  • the fibrous web runs while it is provided with the application medium.
  • the roll neck can also be part of a so-called applicator roll, on the peripheral surface of the application medium is first applied and then discharged to the fibrous web.
  • applicator roll on the peripheral surface of the application medium is first applied and then discharged to the fibrous web.
  • single-sided application only one such application roller is set in the operating position, while with simultaneous two-sided application, two application rollers form a nip with one another, in which the application medium is transferred to the fibrous web.
  • each journal of a roller that is to say on the driver and drive side of the applicator, is provided with its own, ie separate, splash guard.
  • each journal of a roller that is to say on the driver and drive side of the applicator, is provided with its own, ie separate, splash guard.
  • the splash guard is formed so that it spans at the same time a plurality of roll necks, at least of two together forming a nip (press nip) rollers per roll end side or device side.
  • a nip press nip rollers per roll end side or device side.
  • such an "extended" spray protection device in the machine longitudinal direction can be arranged in each case on the driver's side and on the driving side.
  • the splash guard is designed as a turn-on and swing-hood. It can be easily cleaned even during the job and also does not need to be removed during cleaning. But it is also possible to attach the hood on the bearing housing or on the support frame of the applicator detachably and, for example, to screw.
  • the splash guard can be U-shaped, preferably formed with circular arc shape, as a hood. This form has advantages over, for example, also possible angled designs because no corners and edges are present, in which the Abspritzungen could accumulate.
  • the splash guard with a hydrophobic, i. Water-repellent and / or dirt-repellent coating material is provided, which can be applied both on the inside (here preferred), as well as on the outside or on both sides.
  • a coating material or solid material for the splash guard is particularly suitable polytetrafluoroethylene (PTFE or Teflon) or the like, because this material has excellent non-stick properties and the abspritzende by the applicator and on the splash guard precipitate medium can thereby easily bead.
  • PTFE polytetrafluoroethylene
  • a further advantageous embodiment of the invention is that the splash guard is double-walled. On the one hand it thereby gains more stability, on the other hand it can be filled for example with a coolant, for example water, for a better bead-off effect or else a heating medium, such as hot water or superheated steam, if the medium is to adhere specifically there.
  • a coolant for example water
  • a heating medium such as hot water or superheated steam
  • the splash guard has an inwardly facing gutter, from which the collected contaminants together with cleaning liquid can be deducted.
  • the splash guard In order to make the splash guard as effective as possible, it is provided to arrange the splash guard in only a minimal distance, which is approximately up to 100 mm, preferably 1 to 10 mm, to the end face of the roller.
  • the distance of the splash guard to the face of the respective roller can be minimized if either a sliding seal or a labyrinth seal is attached.
  • the device according to the invention is characterized by a simple structure, wherein the splash guard can also be retrofitted in existing applicator.
  • splash guard installation of such a splash guard is not only limited to application devices, but is also conceivable, for example in press rolls or smoothing rollers and thus everywhere applicable where Abspritzungen - even of drops of water - are feared in the vicinity of rotating rollers and should be avoided.
  • FIG. 1 shows an applicator device 1, a so-called film press, comprising two rolls 2 and 2a forming a nip N with one another for indirect application of a liquid to pasty application medium 3 on both sides (or 3a on roll 2a), for example a coating color.
  • the application medium 3, 3a is applied in an indirect manner, selected in the example, by means of a respective application unit 4 or 4a. This is done first on the peripheral surface of the rollers 2 and 2a.
  • the transfer of the medium 3, 3a takes place at the same time on both sides of the fibrous web 5.
  • rollers 2 and 2a which rotate in the direction of the arrow, each have at their two ends 6 and 6a (that is the end of the shell of the applicator roll 2 and 2a) a roll pin 7 or 7a.
  • This roll neck 7 and 7a is received at a distance a to the end face 6 and 6a in a bearing housing 8 and 8a, which in turn is supported in a support frame (chairing) 9 of the applicator device 1.
  • Figure 1 and Figure 2 (Figure 2 is a plan view of the device shown in Figure 1 with only one end face of the roller 2 and 2a shown) those areas are indicated in the escape dirt particles and pollution of the environment, such as in the transverse direction the operating device 1 extending operating webs 10, but in particular the area around the roll pins 7 and 7a lead.
  • the in The dot-shaped clouded area shown in FIGS. 1 and 2 is intended to represent the extent of the medium mist M N leading to contamination of the environment in the prior art. This medium mist results at high running speeds of the rollers and the fibrous web from spitting order medium particles and also from water droplets of existing edge nozzles, which serve to moisten the roll edge. These contaminations caused by spraying require increased cleaning effort and possibly shorter cleaning cycles.
  • one splash guard 11 and 11a is arranged one for each roller 2 and 2a.
  • the splash guards 11 and 11a have a simple-to-produce and clean hood shape with circular arc-shaped surface.
  • the splash guards 11 and 11a are attached to the housing of the rollers or on the support frame 9 for the applicator 1 and also designed swiveling. With 11 'and 11a' and dash-dotted lines the pivoted protective devices 11 and 11a are shown.
  • FIG. 6 Another embodiment of the splash guard according to FIG. 5 and the associated plan view. FIG. 6.
  • the splash guard is indicated here with 11 b and at the same time spans both lying on a common device side areas of the roll neck 7 and 7 a.
  • This embodiment is easier to produce, but a little less variable.
  • the splash guard 11 b also turn on and swung designed, as indicated in dash-dotted lines and designated 11 b '. Because the splash guard 11 b is formed extended relative to the variant 11 and 11 a of Figure 3 and 4, a circular arc-shaped hood would be the height too much enlarge. Therefore, a slightly angled box-like design is chosen in this variant.
  • FIG. 7 shows an arcuate splash protection device 11 or 11a, as it is also shown in FIG.
  • FIG. 8 shows a coating on both sides, that is also on the outside 14.
  • FIG. 9 shows a double-walled splash guard 11, 11a.
  • the splash guard 11 b could be double-walled.
  • the existing cavity or interior space 15 can thereby be filled with a temperature control agent 16, such as a coolant, for example water, or else with a heating medium, such as superheated steam or hot water.
  • a temperature control agent 16 such as a coolant, for example water
  • a heating medium such as superheated steam or hot water.
  • a coolant is used if you want to achieve beading due to condensation.
  • Heating means are used when the caking of the collected contaminants (medium mist particles M N ) is favored in order to then be able to remove them selectively from the respective inside and / or outside.
  • FIG. 10 shows that the inside 12 of the splash guard 11, 11a (which is also possible in the case of the splash guard 11b) can be humidified or steamed from the outside via supply lines and spray nozzles 17 in order to achieve the effects described above.
  • the splash guard 11, 11 a, 11 b therefore does not need to be double-walled here
  • gutter 18 for catching the beaded or rinsed soils from where they can be peeled off to the outside.
  • FIG. 11 is intended to indicate that the splash guard 11, 11a or 11b is arranged at a minimum distance a from the end face 6 or 6a of the roller 2 or 2a.
  • the distance a is approximately up to 100 mm, preferably 1 to 10 mm, whereby an effective encapsulation of the area around the roll pins 7 and 7a is achieved.
  • Figures 12 and 13 show that the distance a of the splash guard 11, 11a or 11b said end face 6 or 6a by attaching a sliding seal 19, for example, with attachment of rubber strips (see Figure 12) or a labyrinth seal 20 (see 13) and the encapsulation effect is thereby improved or the area to be encapsulated is almost ideally sealed.

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  • Coating Apparatus (AREA)
EP05108899A 2004-09-29 2005-09-27 Coucheuse Withdrawn EP1643034A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410047238 DE102004047238A1 (de) 2004-09-29 2004-09-29 Auftragsvorrichtung

Publications (1)

Publication Number Publication Date
EP1643034A1 true EP1643034A1 (fr) 2006-04-05

Family

ID=35601938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05108899A Withdrawn EP1643034A1 (fr) 2004-09-29 2005-09-27 Coucheuse

Country Status (2)

Country Link
EP (1) EP1643034A1 (fr)
DE (2) DE202004021318U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009013259A1 (fr) * 2007-07-26 2009-01-29 Voith Patent Gmbh Dispositif d'application

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011002671A1 (de) 2011-01-13 2012-07-19 Metso Paper, Inc. Leimmittelzuführsystem zum Zuführen von Leimmittel zu einer Papier- oder Kartonbahn

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252443A (en) * 1961-01-31 1966-05-24 Mead Corp Air current-seal for work confinedpool coater
US3379170A (en) * 1965-02-16 1968-04-23 Appleton Mach Liquid applicator
US3630838A (en) * 1969-01-16 1971-12-28 Metal Tech Inc Suction roll assembly for cleaning felts
US4340623A (en) * 1980-12-08 1982-07-20 Beloit Corporation High speed size press
EP0565508A1 (fr) * 1992-04-10 1993-10-13 Valmet Paper Machinery Inc. Support applicateur dans une presse d'encollage
DE4416399A1 (de) * 1994-05-09 1995-11-16 Voith Gmbh J M Vorrichtung zum beidseitigen Auftragen eines flüssigen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
US5711088A (en) * 1994-07-04 1998-01-27 Abb Flakt Ab Device for recuding the effects of the tendency of a paper web to adhere to a drying cylinder in a papermaking machine
EP0930397A1 (fr) * 1998-01-13 1999-07-21 Voith Sulzer Papiertechnik Patent GmbH Dispositif et procédé pour d'enduction d'une substance liquide ou pâteuse sur une bande en mouvement, particulièrement en papier ou en carton
DE10252812A1 (de) * 2002-11-13 2004-06-03 Voith Paper Patent Gmbh Maschine zur Herstellung und/oder Veredelung einer Materialbahn mit zugehöriger Reinigungsanordnung und Reinigungsverfahren

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252443A (en) * 1961-01-31 1966-05-24 Mead Corp Air current-seal for work confinedpool coater
US3379170A (en) * 1965-02-16 1968-04-23 Appleton Mach Liquid applicator
US3630838A (en) * 1969-01-16 1971-12-28 Metal Tech Inc Suction roll assembly for cleaning felts
US4340623A (en) * 1980-12-08 1982-07-20 Beloit Corporation High speed size press
EP0565508A1 (fr) * 1992-04-10 1993-10-13 Valmet Paper Machinery Inc. Support applicateur dans une presse d'encollage
DE4416399A1 (de) * 1994-05-09 1995-11-16 Voith Gmbh J M Vorrichtung zum beidseitigen Auftragen eines flüssigen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
US5711088A (en) * 1994-07-04 1998-01-27 Abb Flakt Ab Device for recuding the effects of the tendency of a paper web to adhere to a drying cylinder in a papermaking machine
EP0930397A1 (fr) * 1998-01-13 1999-07-21 Voith Sulzer Papiertechnik Patent GmbH Dispositif et procédé pour d'enduction d'une substance liquide ou pâteuse sur une bande en mouvement, particulièrement en papier ou en carton
DE10252812A1 (de) * 2002-11-13 2004-06-03 Voith Paper Patent Gmbh Maschine zur Herstellung und/oder Veredelung einer Materialbahn mit zugehöriger Reinigungsanordnung und Reinigungsverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009013259A1 (fr) * 2007-07-26 2009-01-29 Voith Patent Gmbh Dispositif d'application

Also Published As

Publication number Publication date
DE102004047238A1 (de) 2006-04-13
DE202004021318U1 (de) 2007-07-19

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