EP1960602B1 - Système d'application d'une pâte de revêtement fortement abrasive sur une bande transporteuse en déplacement - Google Patents

Système d'application d'une pâte de revêtement fortement abrasive sur une bande transporteuse en déplacement Download PDF

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Publication number
EP1960602B1
EP1960602B1 EP06829615A EP06829615A EP1960602B1 EP 1960602 B1 EP1960602 B1 EP 1960602B1 EP 06829615 A EP06829615 A EP 06829615A EP 06829615 A EP06829615 A EP 06829615A EP 1960602 B1 EP1960602 B1 EP 1960602B1
Authority
EP
European Patent Office
Prior art keywords
carrier web
roll
coating material
support roll
applicator mechanism
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.)
Not-in-force
Application number
EP06829615A
Other languages
German (de)
English (en)
Other versions
EP1960602A1 (fr
Inventor
Hardt Wilhelm
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.)
Grenzebach BSH GmbH
Original Assignee
Grenzebach BSH 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 Grenzebach BSH GmbH filed Critical Grenzebach BSH GmbH
Priority to PL06829615T priority Critical patent/PL1960602T3/pl
Publication of EP1960602A1 publication Critical patent/EP1960602A1/fr
Application granted granted Critical
Publication of EP1960602B1 publication Critical patent/EP1960602B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender

Definitions

  • the invention relates to a coater for applying a highly abrasive particle-containing coating composition to a moving carrier web, in particular a paper web intended for use in the production of abrasion-resistant laminates.
  • Abrasion-resistant laminates in particular for use as floor coverings, obtain their abrasion resistance by an abrasion-resistant cover layer, which consists of an impregnated and abrasion-resistant coated carrier web of paper or similar material whose impregnation and coating takes place by means of a commissioned work, as is the subject of the invention.
  • the coating of the carrier web is known to be carried out with a coating composition consisting essentially of melamine resin and an admixture of corundum particles and therefore very abrasive, which is why a particular problem in the construction of a commissioned work is, on the one hand, a high quality, uniform and clean coating on the Apply carrier web, but while avoiding wear of the components by the abrasive to be applied coating mass as far as possible.
  • a device for coating a paper web with a mixture of liquid resin and fine-grained corundum in which the Paper web is passed with a wrap of slightly more than 180 ° over the lower run of a driven roller with a horizontal roll axis.
  • the mixture of liquid resin and fine-grained corundum to be applied is applied through the paper web in the initial area of wrap around the web by means of a slot die extending across the roll width, the slot die opening obliquely downward toward the roll, and the coating mass is raised several meters higher Reservoir expelled from the slot nozzle with the static pressure thus generated under gravity.
  • an air brush is attached with a blowing slit aimed at the paper web, which serves for pre-smoothing the applied, layer.
  • the paper web then passes over a higher pulley and is deflected there in the horizontal direction.
  • the coating composition is applied to the current running over the lower run of the roll circumference paper web so that gravity and centrifugal force generated by the roller rotation of the applied mass give the tendency to drip radially away from the roll and down or thrown away become.
  • the bottom run of the roll circumference dips into a catch funnel which collects dripping or thrown coating mass and directs it to a sump, from where it is pumped back into the reservoir.
  • the disadvantage of the coating order on the hanging drum is therefore accepted in order to generate at the applicator itself even little wear, which occurs only at the slot and of course on the pumping organs for pumping back of coating material in the reservoir.
  • an applicator device in which a paper web in turn runs horizontally to the underside of a guide roller, is deflected by this with a wrap angle of 180 ° and from the top horizontally expires, in turn, next to this guide roller a metering roller is arranged.
  • the application of the existing resin and fine-grained corundum coating composition is carried out by a slot die, which takes place either up on the lower run of the paper web at the inlet to the guide roller or up to the bottom of the metering. On the upper, expiring from the guide roller run of the paper web is in turn a cloth for smoothing the application layer on.
  • the upwardly opening slot nozzle is disadvantageous in that the coating material containing the abrasive particles must be pressed out therefrom with pressure, which causes wear on the slot nozzle.
  • an embodiment of a downwardly opening onto an overhead region of the metering roller slot nozzle is also described, but in turn has the disadvantage that then the applied to the metering roller coating material gravity and centrifugal force is exposed and over the entire circumference of the metering roller in whose underside area must be transported to the nip.
  • an applicator device known from the just discussed EP 1 084 298 B1 described arrangement differs only by a different shape of the slot nozzle.
  • the support roller is designed as a deflection roller over which a horizontally to the lower run of the guide roller incoming paper web runs at a wrap angle of about 180 ° and runs in the apex line region of the guide roller horizontally again.
  • a metering roller is offset against the direction of rotation of the guide roller by an angle of about 30 ° from the apex line of the guide roller and forms with the guide roller or guided over this paper web a narrow gap, which runs at about 30 ° ascending.
  • an inclined wall is arranged, which forms with the circumference of the guide roller or the paper web a gusset with a funnel-shaped cross section, in which a non-pressurized delivery unit in the form of a manifold, the liquid coating material down on the inclined wall and thus feeds into the gusset.
  • the paper web while being guided upwards over the deflection roll, takes coating material from the gusset volume up into the metering nip, where the layer thickness is regulated.
  • the object of the invention is therefore to provide a commissioned work for coating a paper web or other carrier web with a coating containing abrasive particles, which is the objective of the effective and qualitatively flawless order the coating composition on the paper web or other carrier web with wear minimization even better.
  • the carrier web in particular paper web, first impregnated with resin in an impregnating station passed through it and then passed through a coating station on a short path, so that the Be Mrsungsauf contract wet-on-wet takes place on the impregnated carrier web.
  • the carrier web is guided over a support roller preferably with a relatively small wrap angle, the carrier web rising from the bottom upward to the support roller wraps around an upper portion of the support roller and preferably runs slightly downwardly inclined from the support roller.
  • the task of the coating material is carried out via a feed unit without pressure from the top of the carrier web, and in a short distance or immediately before the nip between the carrier roller with the overlying carrier web and in the apex line area, but preferably just behind the apex line of the support roller arranged doctor roller, the revolves counter to the support roller at low speed.
  • the inventive arrangement allows a simple web guide with a minimization of the necessary web deflections of the carrier web, the carrier roll opposite direction of rotation of the doctor roller can before the acting as metering nip a coating mass wave arise, which on the one hand uniform distribution of Korundteilchen in the coating mass and on the other hand minimizing the wear causes the components.
  • the non-pressurized feed of the application medium avoids foaming.
  • drawing figures 1 and 2 show, in a highly schematic side view, a commissioned work according to the invention with a coating station, and a downstream smoothing roller arrangement.
  • the paper web 1 first passes through an impregnating station, not shown, where the paper web passes through an impregnating bath, also not shown, and is thereby impregnated with liquid melamine resin.
  • the drawings each show on the left the paper web 1 coming from the impregnating station and running over different deflection rollers 2.
  • the paper web 1 runs with a relatively small wrap angle of less than 90 ° over the top of the support roller 4 and leaves it in a slightly downward direction.
  • the doctor roller 5 is arranged above the support roller 4, in the embodiments in an angular position offset by 10 ° from the apex line of the support roller in the direction of travel of the paper web. It would be conceivable arrangement of the doctor roller in a range of +15 ° to -15 °, based on the apex line of the support roller. However, as shown, an offset of the doctor roller 5 in the running direction of the paper web is slightly more advantageous behind the crest line.
  • the doctor roller 5 forms a dosing gap with the support roller 4 or the paper web 1 running over it.
  • a motor gap adjustment device 7 on which the doctor roller 5 is arranged, this metering gap is adjustable.
  • the feeding device 6 performs the existing essentially of a mixture of melamine resin with corundum particles coating composition just before the metering gap between the support roller 4 and the metering roller 5 on the top of the paper web 1 to.
  • the task unit 6 there is a pressureless coating material supply 8, and the task unit 6 has associated with it a support unit 9 assigned to support the task function.
  • the doctor roller 5 is rotated at a slow speed in opposite directions to the direction of rotation of the support roller 4 and thus to the web running direction of the paper web 1.
  • a scraper 10 associated with the squeegee roller 5 scrapes coating material adhered to the squeegee roller and causes it to return to the dispensing unit.
  • an air nozzle Kantenabstreifer 11 is arranged.
  • this could also be replaced by another wiper organ or omitted.
  • a drip tray 12 for dripping resin or coating material is arranged below the actual application work formed from the support roller, the doctor roller and the feeder.
  • the smoothing roller arrangement following the coating station the coating applied to the paper web in the coating station is further smoothed.
  • the smoothing roller assembly has a driven back-up roll 13 and two smoothing rollers 14 arranged in front of and behind the back-up roll, which are arranged on a frame which can be raised and lowered pneumatically.
  • Fig. 1 is the drip pan 13 under the roller assembly filled with coating material, in such a way that the support roller 4 is slightly immersed in the coating material in the drip pan 12. This is used for roller cleaning.
  • the carrier roll is also formed with lateral drains 15 for the coating material, which overflows during coating by application of the coating material by means of the feed unit 6 at the lateral edges of the paper web.
  • the drip pan 12 in the arrangement after Fig. 1 preferably pneumatically raised and lowered arranged on a frame 16, so that the immersion depth of the support roller is adjustable in the coating material. As a result, the drip tray can be lowered as needed by the support roller, so that it no longer immersed.
  • the drip pan 12 preferably has a level control of the liquid level of the coating material in the tub.
  • a drain pipe 17 in the lower region of the drip pan 13 allows circulation of the coating material.
  • a wiper 18 associated with the carrier roll strips coating material entrained by the carrier roller during immersion in the coating material in the drip pan 12 from the peripheral region of the carrier roller extending out of the drip pan.
  • the carrier roll does not dip into the coating material.
  • the drip pan 12 is formed as a simple drip tray that collects only dripping coating material that can be derived or collected via a spout, not shown. In this embodiment, therefore, the drip pan also requires no height adjustment. Likewise, this embodiment eliminates a stripper associated with the support roller.
  • the task unit 6 is in the in Fig. 2 embodiment shown formed with a coating material tray, the trough width is equal to the web width of the paper web 1, and has the easily replaceable lateral boundary wedges and extending over the trough width plastic sealing lip.
  • the support unit 9 also includes a pressing device, which presses the coating material trough the task unit slightly on the doctor roller 5. In the coating material tray of the feeding unit, a leveling of the coating material level takes place.
  • the embodiment according to Fig. 2 is particularly advantageous if, because of the nature of the coating material, it is more advantageous to work without coating material circulation. Then, the coating material is filled directly into the coating material tray of the task unit on the doctor roller and the respective refilling of this tray is controlled by the level control.
  • the applicator unit according to the invention has considerable advantages.
  • the web guide of the paper web is simple and has minimal Bahnumlenkungen. All parts of the commissioned work are easily accessible.
  • the mechanical arrangement is simple and the wear on components is kept to a minimum with very good coating quality.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (11)

  1. Unité d'application destinée à l'application d'une matière de recouvrement contenant des particules abrasives sur une bande porteuse (1) en déplacement,
    comportant un cylindre porteur (4) qui guide la bande porteuse (4) au niveau de sa ligne de crête,
    comportant en outre un cylindre doseur (5) qui forme un interstice de dosage avec le cylindre porteur (4) ou la bande porteuse (1) guidée sur ce dernier et est entraîné dans le sens contraire du cylindre porteur (4) et du sens de déplacement de la bande porteuse (1),
    et comportant une unité d'alimentation sans pression (6, 8, 9) via laquelle la matière de recouvrement liquide est alimentée sur la bande porteuse (1),
    caractérisée en ce que
    le cylindre doseur (5) est disposé au-dessus du cylindre porteur (4) au niveau de sa ligne de crête,
    en ce que le cylindre doseur (5) est entraîné avec une vitesse de rotation lente dans le sens contraire du cylindre porteur (4),
    et en ce que la matière de recouvrement est alimentée sur la bande porteuse (1) par l'unité d'alimentation (6, 8, 9), juste avant la zone d'entrée de la bande porteuse (1) dans l'interstice de dosage entre le cylindre porteur (4) et le cylindre doseur (5).
  2. Unité d'application selon la revendication 1, dans laquelle le cylindre doseur est disposé dans une zone angulaire de quelques degrés avant ou après la ligne de crête du cylindre porteur (4).
  3. Unité d'application selon la revendication 1 ou 2, dans laquelle le cylindre doseur (5) est disposé au niveau d'un dispositif (7) destiné au réglage de la taille de l'interstice de dosage.
  4. Unité d'application selon l'une quelconque des revendications 1 à 3, dans laquelle un racloir à jet d'air (11) est disposé dans la zone où la bande porteuse (1) sort de l'interstice de dosage.
  5. Unité d'application selon l'une quelconque des revendications 1 à 4, dans laquelle l'unité d'alimentation (6, 8, 9) est conçue avec une cuve contenant de la matière de recouvrement, ladite cuve étant alimentée en continu en matière de recouvrement par l'intermédiaire d'une régulation de niveau.
  6. Unité d'application selon l'une quelconque des revendications 1 à 5, dans laquelle la bande porteuse passe par un poste d'imprégnation (A) avant de monter sur le cylindre porteur (4), sort dudit poste d'imprégnation à l'état mouillé et est amenée directement sur le cylindre porteur (4).
  7. Unité d'application selon l'une quelconque des revendications 1 à 6, dans laquelle le cylindre porteur (4) plonge avec sa section inférieure dans une cuve collectrice (12) remplie de matière de recouvrement et une circulation est générée entre la matière de recouvrement sur la cuve collectrice et l'unité d'alimentation (6, 8, 9).
  8. Unité d'application selon la revendication 7, dans laquelle la cuve collectrice (12) est réglable quant à sa position en hauteur par rapport au cylindre porteur (4).
  9. Unité d'application selon l'une quelconque des revendications 1 à 8, dans laquelle la bande porteuse (1) s'éloigne du cylindre porteur (4) de façon légèrement inclinée vers les bas.
  10. Unité d'application selon l'une quelconque des revendications 1 à 9, dans laquelle à l'issue du cylindre porteur (4), la bande porteuse (1) passe par une calandre comportant au moins un cylindre d'appui (13) ainsi qu'au moins un cylindre calandreur (14).
  11. Unité d'application selon la revendication 5, dans laquelle la cuve présente des cales de délimitation latérales interchangeables.
EP06829615A 2006-12-14 2006-12-14 Système d'application d'une pâte de revêtement fortement abrasive sur une bande transporteuse en déplacement Not-in-force EP1960602B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06829615T PL1960602T3 (pl) 2006-12-14 2006-12-14 Mechanizm powlekający do nakładania silnie abrazyjnej masy powłokowej na przemieszczającą się taśmę nośną

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/012064 WO2008071216A1 (fr) 2006-12-14 2006-12-14 Système d'application d'une pâte de revêtement fortement abrasive sur une bande transporteuse en déplacement

Publications (2)

Publication Number Publication Date
EP1960602A1 EP1960602A1 (fr) 2008-08-27
EP1960602B1 true EP1960602B1 (fr) 2011-11-02

Family

ID=38515363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06829615A Not-in-force EP1960602B1 (fr) 2006-12-14 2006-12-14 Système d'application d'une pâte de revêtement fortement abrasive sur une bande transporteuse en déplacement

Country Status (4)

Country Link
EP (1) EP1960602B1 (fr)
AT (1) ATE531851T1 (fr)
PL (1) PL1960602T3 (fr)
WO (1) WO2008071216A1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004063043B3 (de) * 2004-12-22 2006-07-20 Vits Systems Gmbh Vorrichtung zum Auftragen einer Beschichtungsmasse auf eine Papierbahn

Also Published As

Publication number Publication date
EP1960602A1 (fr) 2008-08-27
PL1960602T3 (pl) 2012-03-30
ATE531851T1 (de) 2011-11-15
WO2008071216A1 (fr) 2008-06-19

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