EP1541760B1 - Appareillage de couchage - Google Patents

Appareillage de couchage Download PDF

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Publication number
EP1541760B1
EP1541760B1 EP20040105870 EP04105870A EP1541760B1 EP 1541760 B1 EP1541760 B1 EP 1541760B1 EP 20040105870 EP20040105870 EP 20040105870 EP 04105870 A EP04105870 A EP 04105870A EP 1541760 B1 EP1541760 B1 EP 1541760B1
Authority
EP
European Patent Office
Prior art keywords
calender
coating
roll
web
stand
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 - Fee Related
Application number
EP20040105870
Other languages
German (de)
English (en)
Other versions
EP1541760A1 (fr
Inventor
Thomas Koller
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
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 filed Critical Voith Patent GmbH
Publication of EP1541760A1 publication Critical patent/EP1541760A1/fr
Application granted granted Critical
Publication of EP1541760B1 publication Critical patent/EP1541760B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • 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
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only
    • 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
    • D21H23/30—Pretreatment of the paper
    • 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

Definitions

  • the invention relates to a coating device with a coating unit and a pre-scraper calender with at least one nip, as for example from the document WO 03/050352 A is known.
  • Sheets made of paper or cardboard usually require a relatively smooth surface when they are to be printed. Depending on the desired printing process, different requirements are placed on the smoothness.
  • a coat application is used.
  • a line or a coating is applied to the web. This surface coating improves the surface quality.
  • a coated paper web can then be used, for example, for glossy magazines or magazines.
  • a coated web is usually calendered in a calender after the application of the stroke.
  • the coating unit is often preceded by a calender to vorzuglätten the web before painting.
  • a coating device of the type mentioned is shown for example in "Wochenblatt für Textilfabrikation" 19, 2003, page 1159.
  • Such a coating device occupies a relatively large space within a paper machine.
  • the invention has for its object to provide a coating order cost.
  • This object is achieved in a coating device of the type mentioned above in that the calender and the coating unit are arranged on a common stand with a roller receiving side, which is arranged at an angle of 30 ° to 90 ° to the footprint of the stator.
  • this embodiment of the coating device to achieve several advantages: First, you only need a single stand, which carries both the coating unit and the calender. Although this stand is usually slightly larger than a stand for a single unit. In sum, it takes up less space. This is especially the fact that due to the inclined arrangement of the roll receiving side, the coating unit and the calender are arranged quasi one above the other. So they take up little space in the machine direction, ie running direction of the web. Due to the inclination, there are further advantages. For example, in both the calender and in the coater a simple roller replacement with a Hall crane allows. The fact that both the coating unit and the upstream calender are arranged on a stand, resulting in a short path between the calender and the coating unit.
  • the risk is low that roughened in the calender surface of the web again roughened, for example, by resetting or raising the leveled paper fiber or other roughening before the web enters the coating unit.
  • the volume that can accommodate the stroke kept small, so that there is less penetration.
  • lower heat losses of the web are to be expected by less free trains between the drying cylinder or Schwebetrockner phenomenon and the coating unit.
  • the coating unit has außnip, which is formed by an applicator roll and another roller or a doctor blade, wherein the axes of the applicator roll lie in the same plane as the axes of the rollers of the calender. All axes of the rollers arranged on the stand thus lie in one plane. However, this is not mathematically exact to understand. Minor deviations from this level are allowed. But you can now arrange all roll axes in principle on the roll receiving side of the stand. This facilitates the construction.
  • a measuring frame is arranged between the calender and the coating unit.
  • Such a measuring frame is able to receive the cross sections before the inlet of the web in the coating unit. This allows parameters of the web in the transverse direction, such as smoothness, moisture, shine, etc., before the enema take in the coating unit and control the coating unit accordingly.
  • the measuring frame is attached to the stand. This keeps the construction effort small. The train is monitored immediately where it is treated. Due to the arrangement of the measuring frame on the stand, a spatial association between the web and the measuring frame remains virtually constant.
  • a trajectory is provided which extends over a gap between the calender and the coating unit parallel to the roll receiving side.
  • the web is thus issued in the calender through a nip and enters the coating unit through another nip in the coating unit. In between, the web is guided approximately parallel to the roll receiving side.
  • the measuring frame can be arranged.
  • the measuring frame is arranged on the free outside of the roll receiving side.
  • the coating unit is followed by a non-contact guiding device.
  • a guide may be formed, for example, as a louver or "Airturn".
  • the stand is formed by triangular plates. These triangular plates have the basic shape of a triangle. However, the tips of this triangle may be capped or otherwise formed differently.
  • Such a stand is relatively massive, which has a favorable effect on the vibration tendency of the coater and the calender.
  • the thickness of the plates is at least 150 mm and the plates have a mounting surface parallel to their thickness direction. It is quite possible to accommodate bores, in particular threaded bores, in an area at least 150 mm wide in order to mount bearings of the rollers of the calender or bearings of the rollers of the coating unit or other parts. Within the plate-like stand can then accommodate auxiliary equipment, such as squeegee, free jet nozzles, etc.
  • the calender has a hard roll and a soft roll or a shoe roll.
  • a hard roller and a soft roller together form a soft nip.
  • the soft roller has a relative to the hard roller relatively compliant surface.
  • the shoe roll has a circumferential shell whose surface is also softer than the surface of the hard roll. With such a shoe roll and the hard roller, a so-called broad nip is formed, in which the web can be smoothed volume-saving.
  • a coating device 1 has three aggregates, namely a coating unit 2, in which a line is applied to a continuous web 3 made of paper or cardboard can be, a calender 5 and a measuring frame 6, which is arranged between the calender 5 and the coating unit.
  • the coating unit 2 has two applicator rollers 7, 8, which form an applicator nip 9 between them, through which the web 3 is guided.
  • Each application roller 7, 8 is associated with an application device 10, 11, which apply a coating agent, such as a starch solution or a pigment suspension, as a line on the surfaces of the applicator rollers 7, 8. Shown is an embodiment in which a line on both sides of the web 3 can be applied. If only a single-sided coating application to the web 3 is desired, the application device 10 or the applicator 11 can be omitted.
  • the coating unit 2 is thus designed as a "Speedsizer”, as it is known for example from the company publication "Speedsizer - The universal film application unit for gluing, pigmenting and brushing" of Voith Sulzer Paper GmbH, Krefeld, Germany.
  • the application of the coating color on the two applicator rollers 7, 8 can be done by means of rollers or free-jet nozzles, optionally with a squeegee. Alternatively, you can run the two applicator rollers 7, 8 through a "swamp" and thus realize a kind of size press.
  • a doctor blade can be placed behind the nip 9 to create a so-called "blade stroke". Without a squeegee you create a "contour line" on the wetted web. If you already use the squeegee with the applicator roll, another squeegee is usually unnecessary.
  • the calender 5 which precedes the coating unit 2 has a soft roller 12 with an elastic covering 13 which, together with a hard roller 14, forms a nip 15 in which the web 3 is subjected to increased pressure and also elevated temperature.
  • the nip 15 serves to smooth the surface of the web 3 at least on one side. Especially smoothed is the side which rests against the hard roller 14.
  • the difference between the hard roll 14 and the soft roll 12 is that the soft roll has a surface which is more compliant than the surface of the hard roll 14.
  • the soft roll 12 can also be replaced by a shoe roll in which a roll shell rotates in the manner of a roll, which by a pressing stroke whose shape is adapted to the circumference of the hard roll 14 against the hard roller 15 is pressed.
  • the nip 15 is formed when using a shoe roll as a nip.
  • the measuring frame 6, which is arranged between the calender 5 and the coating unit 2, serves to receive a transverse profile of various parameters before entering the coating unit.
  • the parameters are, for example, smoothness, gloss, moisture, etc.
  • the said three units are mounted on a stator assembly having at the two axial ends of the rollers 7, 8, 12, 14 each have a stand 16.
  • the stator 16 is formed as a triangular plate. In the present embodiment, it has the shape of a triangle. In this triangle, however, the tips can be cut off or otherwise formed in a manner not shown.
  • Each stand 16 is designed as a solid steel plate having a thickness of at least 150 mm.
  • the stator has a roller receiving side 17, which is inclined at an angle of 30 ° to 90 ° to the footprint 18 of the stator 16. In the present case, the angle is about 45 °. This has the consequence that the calender 5 is arranged practically above the coating unit 2. The space required in the machine direction (based on the figure from left to right) is thereby reduced.
  • the measuring frame 6 is attached via a bracket 19 on the stand 16, so that always a positionally correct assignment between the web 3 and the measuring frame. 6 is guaranteed.
  • the brackets with which they are attached to the frame 16 only schematically or not shown.
  • the axis of the roller or the axes of the rollers 7, 8 of the coating unit 2 and the axes of the rollers 12, 14 of the calender 5 are substantially in one plane. This plane is parallel to the roller receiving side 17. An exact parallelism is not required here. Minor deviations ( ⁇ 15%) are permissible.
  • the calender 5 has an input-side guide roller 20 and an output-side guide roller 21.
  • the coating unit 2 has an input-side guide roller 22 and a non-contact guide 23, for example, a so-called "Airturn" on.
  • the guide 23 thus operates with an air jet which is blown in the direction of the web 3. Since the line is not dried at this point, no touched Leitsch, such as guide rollers can be used because of the deposits.
  • the output-side guide roller 21 of the calender 5 and the input-side guide roller 22 of the coating unit 2 lead the web 3 in a measuring frame 6 passing section 24 approximately parallel to the roller receiving side 17.
  • the distance between the coating unit 2 and the calender 5 is shown here schematically relatively large. However, it can be further shortened, as long as space for the measuring frame 6 remains.
  • the coating device is arranged online with a paper machine, not shown. Due to the small distance to the paper machine, the web 3 enters the calender 5 at a relatively high temperature. Due to the relatively small distance between the calender 5 and the coating unit 2, the web 3 also has a relatively high temperature in the coating unit 2. Thus, there are only a few free moves between the paper machine and the coating unit 2, even low heat losses of the web.
  • the risk of the roughened surface roughening is low.
  • the volume of the web 3 when entering the coating unit 2 remains practically as low as it was at the exit from the calender 5. Accordingly, you need less coating color. The penetration is lower.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)

Claims (9)

  1. Dispositif de couchage comprenant un appareil de couchage et une calandre montée avant l'appareil de couchage, comprenant au moins un pinçage, caractérisé en ce que la calandre (5) et l'appareil de couchage (2) sont disposés sur un support commun (16) avec un côté de réception de cylindres (17), qui est disposé suivant un angle de 30° à 90° par rapport à la surface d'appui (18) du support (16) .
  2. Dispositif de couchage selon la revendication 1, caractérisé en ce que l'appareil de couchage (2) présente un pinçage d'application (9) qui est formé par un cylindre d'application (7) et un autre cylindre ou une racle, les axes du cylindre d'application (7) se situant dans le même plan que les axes des cylindres (12, 14) de la calandre (5).
  3. Dispositif de couchage selon la revendication 1 ou 2, caractérisé en ce que l'on dispose entre la calandre (5) et l'appareil de couchage (2) un cadre de mesure (6).
  4. Dispositif de couchage selon la revendication 3, caractérisé en ce que le cadre de mesure (6) est fixé sur le support (16).
  5. Dispositif de couchage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on prévoit une allure de bande qui s'étend sur un espace intermédiaire entre la calandre (5) et l'appareil de couchage (2), parallèlement au côté de réception de cylindres (17).
  6. Dispositif de couchage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on monte derrière l'appareil de couchage (2) un dispositif conducteur (23) fonctionnant sans contact.
  7. Dispositif de couchage selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le support (16) est formé par des plaques triangulaires.
  8. Dispositif de couchage selon la revendication 7, caractérisé en ce que l'épaisseur des plaques vaut au moins 150 mm et les plaques présentent, parallèlement à leur direction d'épaisseur, une surface de montage.
  9. Dispositif de couchage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la calandre (5) présente un cylindre dur (14) et un cylindre souple (12) ou un cylindre à sabot.
EP20040105870 2003-12-13 2004-11-18 Appareillage de couchage Expired - Fee Related EP1541760B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003158414 DE10358414A1 (de) 2003-12-13 2003-12-13 Streichvorrichtung
DE10358414 2003-12-13

Publications (2)

Publication Number Publication Date
EP1541760A1 EP1541760A1 (fr) 2005-06-15
EP1541760B1 true EP1541760B1 (fr) 2008-06-25

Family

ID=34485363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040105870 Expired - Fee Related EP1541760B1 (fr) 2003-12-13 2004-11-18 Appareillage de couchage

Country Status (2)

Country Link
EP (1) EP1541760B1 (fr)
DE (2) DE10358414A1 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111281B (fi) * 2001-12-12 2003-06-30 Metso Paper Inc Menetelmä kartongin jälkikäsittelemiseksi

Also Published As

Publication number Publication date
DE502004007434D1 (de) 2008-08-07
EP1541760A1 (fr) 2005-06-15
DE10358414A1 (de) 2005-07-07

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