EP2570194B1 - Système de dosage à racle - Google Patents

Système de dosage à racle Download PDF

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Publication number
EP2570194B1
EP2570194B1 EP12178051.4A EP12178051A EP2570194B1 EP 2570194 B1 EP2570194 B1 EP 2570194B1 EP 12178051 A EP12178051 A EP 12178051A EP 2570194 B1 EP2570194 B1 EP 2570194B1
Authority
EP
European Patent Office
Prior art keywords
doctor
bed
supporting part
base
metering system
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
EP12178051.4A
Other languages
German (de)
English (en)
Other versions
EP2570194A1 (fr
Inventor
Reinhard Knop
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.)
Horst Sprenger GmbH
Original Assignee
Horst Sprenger GmbH
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Filing date
Publication date
Application filed by Horst Sprenger GmbH filed Critical Horst Sprenger GmbH
Publication of EP2570194A1 publication Critical patent/EP2570194A1/fr
Application granted granted Critical
Publication of EP2570194B1 publication Critical patent/EP2570194B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • 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 doctor metering system for a device for coating a material web, in particular paper or board web, with a doctor rod as metering element, which is mounted in a groove of a doctor bed, which is removably mounted in the frame of the system.
  • a squeegee system of the generic type is in the WO 03/078077 A1 described.
  • the doctor bar is held in a doctor bed of elastomeric material which is stored in a holder associated with the machine frame.
  • the squeegee bed is supported by a pressure hose, so that the thickness of the metered film on the roller or the web can be limited by the pressure in the pressure hose.
  • the squeegee bars are usually made of steel with a diameter between 6 mm - 40 mm. Depending on the application, squeegee bars with a smooth outer surface or squeegee bars with circumferential grooves are used. In the case of doctor blades with a smooth lateral surface, a small gap is created during operation to the web to be coated, through which the coating material passes in the desired amount.
  • the doctoring and metering system is preferably used in a region in which the web is supported by a counter-roller. Squeegee bars with circumferential grooves abut when dosing on the web or the roller. The remaining coating weight is determined primarily by the groove cross section through which the coating material can pass.
  • the rotating doctor blade rod in operation causes considerable wear of the doctor bed, especially when abrasive pigment coatings are used in the coating of paper or board webs.
  • the material and production-intensive doctor beds must therefore be replaced at regular intervals.
  • a relatively small diameter doctor bed is removably inserted into a groove of a holder at the front thereof.
  • the doctor bed is designed as small as possible wearing part and can be easily installed and removed with inserted doctor rod.
  • a squeegee device which is modular, comprising a head part and a foot part.
  • the head part is provided with a first holder for receiving it pressure hose and the foot part with a second holder for receiving a clamping tube.
  • the doctor device leaves Install and remove as a unit with the hoses, especially to realize a hose change outside the machine.
  • the invention has for its object to make a doctor metering system so that both allows a quick change of wearing parts, as well as a simple cleaning, for example, with high-pressure cleaners allows.
  • the system consists of two separately removable from the machine frame components.
  • the first component contains the doctor bed with the doctor rod, optionally with an additional holding part. It is supported on its back by a second component, to which both the hose for pressing the doctor bed and a member for clamping the feet are fixed in the system.
  • the wear parts can be so in case of wear by easier release of the clamping element of the frame remove, leaving the support member with the pressure hose and the clamping element in the machine.
  • the design of the doctor bed can be made so that it consists of one piece of the doctor rod holding part and a downwardly extending foot-like extension.
  • the doctor bed including the extension is preferably supported on the entire back of the support member. His foot is clamped together with the foot of the support and holding part by means of the clamping element in the system.
  • the doctor bed can be arranged in a separate holding part, as for example in the WO 03/078077 A1 is described. Then the support member supports the additional holding the doctor bed holding part at the back.
  • the additional holding member also has a downwardly extending foot, which is clamped together with the foot of the support member by means of the clamping member in the context of the system.
  • the clamping element is attached to the back of the support member clamping hose. This ensures an automatic adaptation to manufacturing or installation inaccuracies.
  • a clamping rod it can also be advantageously mounted vertically movable as a clamping element on the support member, a clamping rod.
  • the clamp bar is located at the rear of the support member and clamps downwardly as it moves downwardly between a foot of the support member and the frame. This will cause a mechanical lock.
  • the foot has a cross-section widening downwards.
  • the dosing systems shown in the figures are part of an apparatus for coating a paper or board web 1 with a coating color. When directly applied to the web this is supported in the dosing of a counter-roller 2.
  • the metering dosing system can be used for indirect dosing, in which a predosed film of coating material is first applied to a roller and then discharged from this to the web.
  • a known application system (nozzle applicator, roller applicator, etc.) is arranged, is applied by the coating color in excess to the web 1 or - in the indirect dosing - on the roller 2.
  • an application chamber 15 is arranged in front of the dosing, which is bounded on the inlet side by an overflow plate 16.
  • In the application chamber 15 opens a supply line 17, is supplied by the coating material in excess. The excess passes through the gap between the overflow plate 16 and the roller 2.
  • the metering metering system contains a metering element as a doctor bar 3 which is rotatably mounted in a direction towards the web 1 partially open doctor bed 4 by means of a rotary drive.
  • the lateral surface of the doctor bar 3 is provided either smooth or circumferential grooves. Its diameter is 6 mm - 40 mm, preferably 9 mm - 25 mm.
  • the axial length of the doctor bar 3 corresponds to the working width of the coating device, which may be 10 m or more.
  • the doctor bar 3 is made of stainless steel, and its outer surface is wear-resistant coated, for example, chrome-plated or coated with ceramic.
  • the doctor bed 4 is preferably made of an at least limited elastic material. Suitable materials are elastomers, preferably polyurethane or polyethylene. The hardness of the material is chosen so that the bed 4 can be sealingly applied to the doctor bar 3 in order to prevent penetration of coating color into the bed 4.
  • the doctor bed 4 has a groove 5, in which the doctor bar 3 is inserted, the doctor bed 4, the doctor bar 3 in an angular range of at least 180 °, so that it is held securely.
  • the doctor bed 4 is configured over the working width of the coating device, ie the length of the doctor bar 3 with a constant cross section. It contains at least one channel 6 which is open toward the doctor bar 3 and into which water is introduced as lubricant and cleaning agent during operation.
  • the doctor blade bed 4 carrying the doctor bar 3 is clamped with a foot-like part 8 in the frame 9 of the system.
  • the doctor bed 4 is extended down to a foot 8.
  • the doctor bed 4 in a holding part 10th mounted, which also has a downwardly extending foot 8, with which it can be firmly clamped in the frame 9.
  • a support member 7 is arranged on the side facing away from the doctor bar 3 back of the doctor bed 4, since either the doctor bed 4 directly ( FIG. 1 ) or the holding part 10 is supported with the doctor bed 4 therein flat on the back.
  • the support member 7 is designed separately from the doctor bed 3 or the holding part 10, it supports these parts only at the back from. Thus, the support member 7 can be removed separately from the doctor bed 4 / holding part 10 removed from the dosing and reinstalled.
  • a pressure hose 11 is fixed at the level of the doctor rod 3, which serves to adjust the contact pressure of the doctor rod 3.
  • the pressure hose 11 is supported on the side facing away from the doctor bed 4 on a profile rail 21 mounted in the frame 9.
  • the profile strip 21 can be adjusted by means of screws 22 toward the pressure hose 11 back and forth. If a profiling over the machine width should be possible, the profile strip 21 is limited elastic, and there are over the machine width a number of screws 22 spaced from each other to selectively bend the profile strip 21 in individual areas.
  • a clamping element is attached, which is arranged on the back of the support member 7 in the region of the foot 12 acts. It serves to clamp the doctor bed 4 or the holding part 10 together with the foot 12 in the frame 9 of the system. For this purpose, when inserting the parts of the foot 8 of the doctor bed 4 or the holding part 10 between the foot 12 of the support member and the frame 9 is clamped.
  • a clamping hose 14 By applying the clamping hose 14 with air this presses against the frame 9 and thus fixes the two feet 8, 12th
  • the foot 12 of the support member 7 is mechanically clamped and locked with the foot 8 of the doctor bed 4.
  • the foot 12 has a wedge-shaped cross-section widening downwards.
  • a clamping rod 18 is arranged vertically movable on its rear side, which clamps in the movement down between the foot 12 and the frame 9.
  • the clamping rod 18 is secured at its upper edge to a plurality of thin lifting plates 19 which are vertically movable by a vertical gap 20 in the upper part of the support member 7 movable.
  • the lifting plates 19 can be so lower the clamping bar 18 for clamping and locking and lift to release and unlock.
  • the upper end of the lifting plate 19 is attached to the top of the support member 7 so that it can be removed together with the clamp rod 18 attached to it from the frame 9.
  • the clamping rod 18 may also be attached to one or more lifting wires, which are then also mounted vertically movable on the support member 7.
  • the pressure hose 11 is also supported on the frame 9 for pressing the doctor rod 3.
  • the point of action of the clamping element is the point of attachment of the clamping tube 14.
  • the doctor bed 4 according to the FIGS. 1 and 3 , as well as the holding part 10 after FIG. 2 are also designed with a reduced diameter in the area of the weak point 13, so that the upper parts can tilt.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)

Claims (6)

  1. Système de dosage à racle pour un dispositif destiné à l'enduction de bandes de matériau (1), en particulier de bandes de papier ou de carton, avec une barre de racle (3) comme élément de dosage, qui est logé dans une rainure d'un sommier de racle (4), qui est fixé amovible dans le cadre du système, une pièce de soutien (7) étant disposée sur le côté arrière du sommier de racle (4) opposé à la barre de racle (3), laquelle
    - soutient le sommier de racle (4) ou une pièce de maintien (10) retenant le sommier de racle (4) sur le côté arrière,
    - est configurée de manière à pouvoir être enlevée du système de dosage, séparément du sommier de racle (4) ou de la pièce de maintien (10) retenant le sommier de racle (4), et
    - sur le côté arrière de laquelle opposé au sommier de racle (4) un flexible de pression (11) est fixé à la hauteur de la barre de racle (3) et est disposé un élément de serrage (14, 18) agissant dans la zone du pied (12) de la pièce de soutien (7),
    caractérisé en ce que le sommier de racle (4) est prolongé vers le bas vers un pied (8), qui peut être bloqué solidairement avec le pied (12) de la pièce de soutien (7) au moyen de l'élément de serrage (14, 18) dans le cadre (9) du système.
  2. Système de dosage à racle selon la revendication 1, caractérisé en ce que le sommier de racle (4) est logé dans une pièce de maintien (10) qui est soutenue sur son côté arrière par la pièce de soutien (7) et comporte un pied (8) s'étendant vers le bas, qui peut être bloqué conjointement avec le pied (12) de la pièce de soutien (7) au moyen de l'élément de serrage (14, 18) dans le cadre (9) du système.
  3. Système de dosage à racle selon la revendication 1 ou 2, caractérisé en ce que l'élément de serrage est un flexible de serrage (14) fixé au côté arrière de la pièce de soutien (7).
  4. Système de dosage à racle selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le pied (12) de la pièce de soutien (7) présente une section cunéiforme s'élargissant vers le bas et une barre de serrage (18) est disposée verticalement mobile sur son côté arrière en tant qu'élément de serrage, qui se bloque lors du mouvement vers le bas entre le pied (12) et le cadre (9).
  5. Système de dosage à racle selon la revendication 4, caractérisé en ce que la barre de serrage (18) est fixée au bord inférieur d'une fine tôle de levage (19) ou d'un câble de levage, qui est fixé verticalement mobile au côté supérieur de la pièce de soutien (7).
  6. Système de dosage à racle selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la pièce de soutien (7) contient, entre le point d'action de l'élément de serrage (14, 17) et la fixation du flexible de pression (11), un point faible (13) agissant comme point d'articulation, qui permet un mouvement de basculement de la partie supérieure causé par le flexible de pression (11) pour presser le sommier de racle (4), indépendamment du pied (12) bloqué.
EP12178051.4A 2011-09-13 2012-07-26 Système de dosage à racle Not-in-force EP2570194B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011112956A DE102011112956A1 (de) 2011-09-13 2011-09-13 Rakel-Dosiersystem

Publications (2)

Publication Number Publication Date
EP2570194A1 EP2570194A1 (fr) 2013-03-20
EP2570194B1 true EP2570194B1 (fr) 2016-10-12

Family

ID=46603637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12178051.4A Not-in-force EP2570194B1 (fr) 2011-09-13 2012-07-26 Système de dosage à racle

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EP (1) EP2570194B1 (fr)
DE (1) DE102011112956A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022105636A1 (de) 2022-03-10 2023-09-14 Voith Patent Gmbh Rakeldosiervorrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2813617B1 (fr) * 2013-06-14 2016-08-31 Valmet Technologies, Inc. Dispositif de couchage ou collage pour appliquer une substance de traitement sur une bande de fibres
WO2017148477A1 (fr) 2016-03-04 2017-09-08 Horst Sprenger Gmbh Lame de couchage refroidie d'un dispositif à racle
DE102017116621A1 (de) 2017-07-24 2019-01-24 Horst Sprenger Gmbh Spezialwerkzeuge Gekühlte Streichklinge für eine Vorrichtung zum Beschichten von Materialbahnen

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
AT319734B (de) * 1971-10-13 1975-01-10 Feldmuehle Anlagen Prod Vorr zum streichen von bahnfoermigem gut
US5264247A (en) * 1990-09-14 1993-11-23 Valmet Paper Machinery Inc. Process for the manufacture of a coating bar for a bar coater
FI106139B (fi) * 1999-03-26 2000-11-30 Valmet Corp Sauvakaavin
FI111477B (fi) * 1999-04-20 2003-07-31 Metso Paper Inc Päällystyslaite
DE20023716U1 (de) * 2000-09-13 2005-10-06 Horst Sprenger Gmbh Rakel-Dosiersystem
EP1485209B1 (fr) 2002-03-13 2005-08-03 Horst Sprenger GmbH Systeme de dosage a racle
DE102004029565A1 (de) 2004-06-18 2006-01-05 Voith Paper Patent Gmbh Rakelvorrichtung
US8028648B2 (en) * 2005-12-02 2011-10-04 Metso Paper, Inc. Rod cradle, instert to be used in a rod cradle, and method for inserting a rod in a rod cradle
DE102007055888A1 (de) * 2007-12-20 2009-06-25 Voith Patent Gmbh Rakelvorrichtung
DE102008000723A1 (de) * 2008-03-18 2009-09-24 Voith Patent Gmbh Rakelvorrichtung
AT517583B1 (de) * 2009-06-08 2017-03-15 Metso Paper Inc Rakeleinrichtung
EP2341185A1 (fr) * 2009-12-22 2011-07-06 Btg Ipi, Llc Dispositif de mesure et unité de support, support, unité d'insert et insert pour un tel dispositif de mesure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022105636A1 (de) 2022-03-10 2023-09-14 Voith Patent Gmbh Rakeldosiervorrichtung

Also Published As

Publication number Publication date
DE102011112956A1 (de) 2013-03-14
EP2570194A1 (fr) 2013-03-20

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