EP0289824B1 - Einrichtung zum Beschichten einer laufenden Papier- oder Kartonbahn - Google Patents

Einrichtung zum Beschichten einer laufenden Papier- oder Kartonbahn Download PDF

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Publication number
EP0289824B1
EP0289824B1 EP88105935A EP88105935A EP0289824B1 EP 0289824 B1 EP0289824 B1 EP 0289824B1 EP 88105935 A EP88105935 A EP 88105935A EP 88105935 A EP88105935 A EP 88105935A EP 0289824 B1 EP0289824 B1 EP 0289824B1
Authority
EP
European Patent Office
Prior art keywords
coating
web
outlet channels
walls
levelling chamber
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
EP88105935A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0289824A2 (de
EP0289824A3 (en
Inventor
Hans-Peter Sollinger
Richard Bernert
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
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT88105935T priority Critical patent/ATE72275T1/de
Publication of EP0289824A2 publication Critical patent/EP0289824A2/de
Publication of EP0289824A3 publication Critical patent/EP0289824A3/de
Application granted granted Critical
Publication of EP0289824B1 publication Critical patent/EP0289824B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • 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
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • Such a device has become known from DE-OS 15 46 312.
  • the coating slip enters the leveling chamber through the inlet slot and fills it completely. Part of the coating slip leaves the leveling chamber, adhering to the paper web, on the outlet sides, namely between the doctor element and the paper web. Another part, namely the excess, leaves the leveling chamber again on the inlet side, in countercurrent to the coating slip arriving there. Two streams are thus present in the inlet gap and run in opposite directions.
  • the invention has for its object to design a device according to the generic term such that the disadvantages of flow and countercurrent in the area of the inlet into the leveling chamber are avoided.
  • a paper web wraps around a rotatable support roller 1.
  • the paper web is coated with coating slip 18, which was applied to a roller applicator, not shown here, containing an immersion roller.
  • the coating slip 18 was applied in excess.
  • a leveling chamber 1 can also be seen, which - seen in the direction of travel of the paper web (see arrow) - is delimited on the inlet side by a front wall 4 and on the outlet side by a doctor blade 3.
  • the leveling chamber 1 is delimited by the supporting wall 29 of a supporting beam and a clamping piece 25 fastened to it.
  • the doctor blade 3 is fixed on the clamping piece 25 by means of the clamping lever 28.
  • the front wall 4 is slidably held on the support wall 29 in the direction of the double arrow (not shown in detail here).
  • the front wall 4 is designed in a special way.
  • An attachment part 6 forms a wedge-shaped inlet gusset against the support roller 2.
  • an outlet channel 10, which - seen in the direction of flow - consists of a section 8 of a relatively large flow cross section and a section of a relatively small flow cross section.
  • Section 8 contains a cylindrical rotary valve 7.
  • the rotary valve 7 has a plurality of recesses 9, which - seen in the direction of the longitudinal axis of the rotary valve 7 - are arranged side by side. Likewise, a large number of outlet channels 10 are provided over the entire machine width, e.g. 3 with respect to the other variant (openings 10 '). The length of the rectangular cross section of the outlet openings 10 can also be significantly greater. It is theoretically possible - with a relatively small machine width - that only a single, slot-shaped outlet channel is provided, which extends over the entire machine width, and on the other hand also a plurality of rotary valves.
  • FIGS. 2 and 3 only reveals its front wall, namely in cross section (FIG. 2) and in plan view from the side from which the paper web runs in (FIG. 3).
  • the front wall 24 in turn has outlet channels 20, namely a plurality of these channels arranged distributed over the entire machine width.
  • a slide bar 15, which has windows 16, is assigned to the run-up channels 20.
  • the number of windows 16 is exactly the same as the number of outlet channels 20.
  • the outlet channels can be opened more or less in that the slide bar 15 is displaced transversely to the direction of travel of the paper web and the outlet channels are released more or less.
  • the pre-metered amount of the coating slip 18 applied in abundant overdosing now enters the leveling chamber 1 through the gap 14 formed on the material web.
  • the excess coating slip wiped off the doctor blade 3 flows out of the leveling chamber 1 through the outlet channels 10 and 20 and is fed to a collecting trough.
  • the chamber can also be closed by resilient side walls 22 on the edges of the web.
  • a gap with a small gap width 14 is now set by moving the front wall 4.
  • the rotary valve 7 or the throttle valve 15 is then adjusted so that the excess coating slip only exits from the leveling chamber 1 through the outlet channels 10 or 20, but not or not to a significant extent through the gap 14. This results in the most uniform flow conditions in the leveling chamber 1 including gap 14 and a perfect line without streaks, formation of orange peel, film splitting or the like in the area of the web.
  • FIG. 4 corresponds essentially to that shown in FIG. 1 except for the only difference that the slide 7 and the outlet channels 40 of the leveling chamber 21 are not in the front wall 26, but in which the doctor blade 3 load-bearing rear wall 12.
  • the outlet channels 50 are in the lower, i.e. Wall 49 of leveling chamber 31, which is remote from counter roll 2 or web of material.
  • Rotary slide 7 is clamped between a clamping strip 48 and a part of front wall 34 which projects beyond lower wall 49.
  • the leveling chamber is preferably closed by side baffle walls or sealing walls 17, 27, 37. It is not necessary that these walls rest on the web or the counter roll (then they would have to be made of soft material that is flexible), because it is sufficient that a small gap of 1 to 2 mm to the counter roll or web 2 exists.
  • These baffle walls are preferably held in holding devices which are formed in the form of extensions 33 of the walls of the leveling chamber. It can therefore be replaced and adapted to the different positions of the leveling chamber. This is shown in particular in the details in FIG. 3.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Road Signs Or Road Markings (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
EP88105935A 1987-05-07 1988-04-14 Einrichtung zum Beschichten einer laufenden Papier- oder Kartonbahn Expired - Lifetime EP0289824B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105935T ATE72275T1 (de) 1987-05-07 1988-04-14 Einrichtung zum beschichten einer laufenden papier- oder kartonbahn.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3715154 1987-05-07
DE3715154 1987-05-07
DE19873734900 DE3734900A1 (de) 1987-05-07 1987-10-15 Einrichtung zum beschichten einer laufenden papier- oder kartonbahn
DE3734900 1987-10-15

Publications (3)

Publication Number Publication Date
EP0289824A2 EP0289824A2 (de) 1988-11-09
EP0289824A3 EP0289824A3 (en) 1989-02-15
EP0289824B1 true EP0289824B1 (de) 1992-01-29

Family

ID=25855286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105935A Expired - Lifetime EP0289824B1 (de) 1987-05-07 1988-04-14 Einrichtung zum Beschichten einer laufenden Papier- oder Kartonbahn

Country Status (7)

Country Link
EP (1) EP0289824B1 (enrdf_load_stackoverflow)
JP (1) JPS6438168A (enrdf_load_stackoverflow)
AT (1) ATE72275T1 (enrdf_load_stackoverflow)
BR (1) BR8802365A (enrdf_load_stackoverflow)
DE (2) DE3734900A1 (enrdf_load_stackoverflow)
ES (1) ES2028926T3 (enrdf_load_stackoverflow)
FI (1) FI90740C (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2055823T3 (es) * 1989-06-22 1994-09-01 Voith Gmbh J M Dispositivo extendedor.
US5376177A (en) * 1993-08-09 1994-12-27 Macmillan Bloedel Limited Coat weight profiling
DE4402108A1 (de) * 1994-01-26 1994-06-30 Voith Gmbh J M Maschine zum Streichen einer laufenden Bahn, insbesondere einer Papierbahn
DE19723458A1 (de) * 1997-06-04 1998-12-10 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zum Auftragen eines flüssigen oder pastösen Mediums auf einen sich vorbeibewegenden Untergrund
DE19821771A1 (de) * 1998-05-14 1999-11-18 Voith Sulzer Papiertech Patent Vorrichtung zum Auftragen eines flüssigen oder pastösen Auftragsmediums in einem Auftragsbereich auf einen laufenden Untergrund
DE19854448A1 (de) * 1998-11-25 2000-05-31 Voith Sulzer Papiertech Patent Vorrichtung und Verfahren zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf einen laufenden Untergrund

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302610A (en) * 1963-10-10 1967-02-07 Beloit Corp Inverted trailing blade
US4369731A (en) * 1981-09-02 1983-01-25 Consolidated Papers, Inc. Coating apparatus having an internal leveling blade
US4396648A (en) * 1982-02-08 1983-08-02 Consolidated Papers, Inc. Paper coating apparatus and method
US4503804A (en) * 1983-01-17 1985-03-12 Consolidated Papers, Inc. Edge seal assembly for paper coating apparatus
DE8400325U1 (de) * 1984-01-07 1985-07-18 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum Beschichten von über eine Stützwalze laufenden Materialbahnen mit regelbarer Auftragsstärke
DE3438181A1 (de) * 1984-10-18 1986-04-24 J.M. Voith Gmbh, 7920 Heidenheim Randabdichtung fuer streicheinrichtung zur beschichtung laufender warenbahnen
DE3513063A1 (de) * 1985-04-12 1986-10-16 Jagenberg AG, 4000 Düsseldorf Streicheinrichtung zur beschichtung von entlang einer gegenwalze gefuehrten warenbahn, insbesondere papierbahnen
DE3612248C2 (de) * 1985-05-09 1995-04-13 Cons Paper Inc Streicheinrichtung
WO1987000091A1 (en) * 1985-07-05 1987-01-15 Oy Wärtsilä Ab Short dwell application with big excess paste amount
DE8522036U1 (de) * 1985-07-31 1987-03-05 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum kontinuierlichen Aufbringen einer gleichmäßigen Beschichtung auf eine über eine Gegenwalze laufende Materialbahn, insbesondere Papier- oder Kartonbahn, auf die das Beschichtungsmaterial zunächst im Überschuß aufgebracht und danach egalisiert und dosiert wird

Also Published As

Publication number Publication date
DE3734900C2 (enrdf_load_stackoverflow) 1993-05-06
ATE72275T1 (de) 1992-02-15
FI882082A0 (fi) 1988-05-04
DE3868130D1 (de) 1992-03-12
ES2028926T3 (es) 1992-07-16
JPS6438168A (en) 1989-02-08
FI882082L (fi) 1988-11-08
EP0289824A2 (de) 1988-11-09
EP0289824A3 (en) 1989-02-15
FI90740B (fi) 1993-12-15
FI90740C (fi) 1994-03-25
BR8802365A (pt) 1988-12-13
DE3734900A1 (de) 1988-12-01

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