EP0633353A1 - Système doseur - Google Patents

Système doseur Download PDF

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Publication number
EP0633353A1
EP0633353A1 EP94109366A EP94109366A EP0633353A1 EP 0633353 A1 EP0633353 A1 EP 0633353A1 EP 94109366 A EP94109366 A EP 94109366A EP 94109366 A EP94109366 A EP 94109366A EP 0633353 A1 EP0633353 A1 EP 0633353A1
Authority
EP
European Patent Office
Prior art keywords
clamping
holder
wall
extension
doctor
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.)
Granted
Application number
EP94109366A
Other languages
German (de)
English (en)
Other versions
EP0633353B1 (fr
Inventor
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
Publication of EP0633353A1 publication Critical patent/EP0633353A1/fr
Application granted granted Critical
Publication of EP0633353B1 publication Critical patent/EP0633353B1/fr
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
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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

Definitions

  • the invention relates to a metering system according to the preamble of claim 1.
  • Such metering systems are mainly used for coating webs of paper or cardboard, which is also provided in this case.
  • doctor blades known or designed as roller doctor blades
  • roller doctor blades are used for coating or metering coating slip on sheets of paper or cardboard (see, for example, DE 21 50 906).
  • a roller guiding the paper web is generally associated with the doctor rod.
  • the coating slip used for coating is fed from a chamber through an orifice which, as a boundary wall, has the clamping wall to which the holder of the doctor blade bed receiving the roller doctor rod is fixed, e.g. is pressed.
  • edges or cross-sectional changes in the flow channel now generally arise, which can have a disadvantageous effect on the coating.
  • Such a paragraph also arises in particular at the transition between the aforementioned clamping wall and the holder of the doctor bed.
  • the object of the invention is to design the metering system so that as few edges and jumps in the flow path as possible, i.e. Corresponding cross-sectional enlargements or narrowing occur on the same.
  • the doctor blade bar with 1 and the receiving it generally made of plastic bed with 8 and the holder 8 made in one piece with the bed 8 is designated.
  • the doctor blade rod 1 is generally in contact with a counter roller C guiding the web W, either the coating slip being fed directly to the web or initially only to the roller C, and then later being transferred to the web in an area where it wraps around the roller or touched.
  • the latter is generally the case when a press nip is formed between two web guide rollers and the coating slip is transferred there to the web.
  • the coating slip is fed through the channel 4, which is delimited on one side by a clamping wall 8, on which the holder 3 is pressed by means of a hydraulically or pneumatically operating pressure element 13 - generally designed as a pressure hose.
  • a projection 12 of the holder 3 serves as fixation.
  • the holder 3 now has a thick crack in the region of the end of the clamping wall 8, an extension 6 of the holder being formed which has a bevel which is at a corresponding bevel 9 of the end wall of the Clamping wall 8 is present.
  • the angle which the bevel of the extension 6 forms with the corresponding side wall surface of the holder 3 is between 15 and 55 °.
  • the extension of a tip 7 is formed according to Figure 1, so that there is a smooth transition between the clamping wall 8 and the holder 3 and thus there is a relatively low-loss flow out of the channel 4.
  • a groove 11 at the transition between the extension 6 and the Provided end of the holder. This mobility is necessary so that the doctor bed and thus the doctor rod can be pushed in the direction of the roller C. This is also generally done by means of a pneumatically acting pressure hose 14.
  • FIG. 3 shows a variant in which the extension 6 ′′ of the holder 3 ′′ is relatively long and slender.
  • its side delimitation surface which is distant from the clamping part of the holder 3 ′′, is aligned with the corresponding side delimitation surface of the clamping 8 ′′.
  • the angle of the inclination of the clamping and the extension is approximately 70 ° relatively large and therefore not as cheap as a smaller angle. It is namely favorable if the extension can slide relatively easily on the corresponding wall of the clamping 8 ′′ when the holder 3 ′′ is bent.
  • FIG. 4 shows a relatively short extension 6 '' 'of the holder 3' '', which ends in a small rounded tip and which bears against the corresponding mating surface of the clamping 8 '' '.
  • the holder 23 has a further thick crack at 29 and forms on it with a relatively small cross section trained, relatively weakened point of rotation for the doctor bed.
  • the projection 26 is supported on the clamping wall 28 of the doctor holder. This is arranged approximately at right angles to the wall along which the coating slip flows according to the arrow entered. So here the slope of the clamping wall is no longer available in other figures. In this respect, as well as a slope with too little inclination, ie an angle greater than 55 °, is unfavorable in the event that the doctor bed and holder are replaced by a doctor blade. You then no longer have such a streamlined course of the channel to the web or counter roll or coating edge of the doctor element.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP94109366A 1993-07-10 1994-06-17 Système doseur Expired - Lifetime EP0633353B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4323166 1993-07-10
DE4323166 1993-07-10
DE4327544 1993-08-16
DE4327544A DE4327544C1 (de) 1993-07-10 1993-08-16 Dosiersystem

Publications (2)

Publication Number Publication Date
EP0633353A1 true EP0633353A1 (fr) 1995-01-11
EP0633353B1 EP0633353B1 (fr) 1996-08-28

Family

ID=25927582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109366A Expired - Lifetime EP0633353B1 (fr) 1993-07-10 1994-06-17 Système doseur

Country Status (7)

Country Link
US (1) US5445673A (fr)
EP (1) EP0633353B1 (fr)
JP (1) JPH07108202A (fr)
AT (1) ATE141975T1 (fr)
CA (1) CA2127663A1 (fr)
DE (2) DE4327544C1 (fr)
FI (1) FI943279A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0751256A2 (fr) * 1995-06-30 1997-01-02 Voith Sulzer Papiermaschinen GmbH Ensemble de dosage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029613A1 (de) * 2005-06-23 2007-01-04 Voith Patent Gmbh Vorrichtung zur Dosierung und/oder Egalisierung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150907A1 (de) * 1971-10-13 1973-04-19 Feldmuehle Anlagen Prod Vorrichtung zum streichen von bahnfoermigem gut
GB2078140A (en) * 1980-06-19 1982-01-06 Jagenberg Werke Ag Doctor for regulating web coating
DE3236991A1 (de) * 1982-10-06 1984-04-12 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung fuer laufende warenbahnen
DE3523449A1 (de) * 1984-06-29 1986-01-09 Osakeyhtiö Wärtsilä Ab, Vertsilä Walzen- und klingenvorrichtung fuer papierbeschichtungsmaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859690A (en) * 1972-10-02 1975-01-14 Ross Ltd James Doctor blade assembly
FI72903C (fi) * 1984-04-17 1987-08-10 Ahlstroem Oy Foerfarande och anordning foer bestrykning av bana.
FI81734C (fi) * 1987-12-03 1990-12-10 Valmet Paper Machinery Inc Foerfarande och anordning foer applicering och dosering av bestrykningsmedel pao roerligt underlag.
US5192591A (en) * 1991-11-14 1993-03-09 Beloit Technologies, Inc. Short dwell coater apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2150907A1 (de) * 1971-10-13 1973-04-19 Feldmuehle Anlagen Prod Vorrichtung zum streichen von bahnfoermigem gut
GB2078140A (en) * 1980-06-19 1982-01-06 Jagenberg Werke Ag Doctor for regulating web coating
DE3236991A1 (de) * 1982-10-06 1984-04-12 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung fuer laufende warenbahnen
DE3523449A1 (de) * 1984-06-29 1986-01-09 Osakeyhtiö Wärtsilä Ab, Vertsilä Walzen- und klingenvorrichtung fuer papierbeschichtungsmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0751256A2 (fr) * 1995-06-30 1997-01-02 Voith Sulzer Papiermaschinen GmbH Ensemble de dosage
EP0751256A3 (fr) * 1995-06-30 1997-05-21 Voith Sulzer Papiermasch Gmbh Ensemble de dosage

Also Published As

Publication number Publication date
DE59400547D1 (de) 1996-10-02
FI943279A (fi) 1995-01-11
FI943279A0 (fi) 1994-07-08
CA2127663A1 (fr) 1995-01-11
ATE141975T1 (de) 1996-09-15
US5445673A (en) 1995-08-29
DE4327544C1 (de) 1995-01-19
JPH07108202A (ja) 1995-04-25
EP0633353B1 (fr) 1996-08-28

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