EP1485209A1 - Systeme de dosage a racle - Google Patents

Systeme de dosage a racle

Info

Publication number
EP1485209A1
EP1485209A1 EP03720149A EP03720149A EP1485209A1 EP 1485209 A1 EP1485209 A1 EP 1485209A1 EP 03720149 A EP03720149 A EP 03720149A EP 03720149 A EP03720149 A EP 03720149A EP 1485209 A1 EP1485209 A1 EP 1485209A1
Authority
EP
European Patent Office
Prior art keywords
doctor
holder
bed
rod
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.)
Granted
Application number
EP03720149A
Other languages
German (de)
English (en)
Other versions
EP1485209B1 (fr
Inventor
Reinhard Dipl. Ing. 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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27815644&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1485209(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Horst Sprenger GmbH filed Critical Horst Sprenger GmbH
Publication of EP1485209A1 publication Critical patent/EP1485209A1/fr
Application granted granted Critical
Publication of EP1485209B1 publication Critical patent/EP1485209B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 doctor blade metering system for a device for coating a material web, in particular a paper or cardboard web, with a doctor bar (3) as a metering element, which is held in a groove of a doctor bed (4) which can be fastened in a system Holder (6) is mounted,
  • devices For coating of running paper or cardboard webs, devices are known to be used which have an application system for applying an excess of a liquid coating material and a subsequent metering system with a doctor rod as a metering element, which doctor the excess coating material down to the desired coat weight.
  • the application and metering takes place either directly on the web or indirectly first on a roller deflecting the web, which then transfers the metered film of coating material to the web.
  • a doctor blade metering system of the generic type is described in DE-A 3022955.
  • the doctor rod is held in a doctor bed made of rubber-elastic material, which is mounted in a holder connected to the machine frame.
  • the doctor bed On its rear side facing away from the doctor rod, the doctor bed is supported by a pressure hose, so that the thickness of the metered film on the roller or the web can be varied to a limited extent via the pressure in the pressure hose.
  • a rinsing channels which run parallel to the doctor rod and are open towards the doctor rod, into which a rinsing liquid, e.g. Water, can be introduced to the storage of the
  • Squeegee metering systems of this type in which the squeegee bed is supported by a pressure hose, are referred to as roller scraper systems. She are used for direct dosing on the web in an area where it is supported by a counter roller. So-called roller doctor systems are also known, in which the web is guided in a free-running area around the doctor rod. In these systems, the doctor bed is attached in a rigid holder without pressure hose.
  • the doctor blades are usually made of steel with a diameter between 6 mm - 40 mm. Since the pigment coating inks usually used as coating material when coating paper or cardboard webs are very abrasive, it is known to increase the wear resistance to coat the doctor rods on their surface with wear-resistant materials. Depending on the application, doctor rods with a smooth outer surface or doctor rods with circumferential grooves are used. In the case of squeegee bars with a smooth outer surface, a small gap to the web to be coated is established during operation, through which the coating material passes in the desired amount. Squeegee bars with circumferential grooves lie against the web or roller during metering. The remaining coat weight is primarily determined by the groove cross-section through which the coating material can pass.
  • doctor beds are made with exact dimensions. Since the doctor beds have a relatively large cross section, they are produced in a casting process in order to achieve the required dimensional accuracy and / or the required dimensional accuracy is achieved by machining. The production is therefore both material and manufacturing intensive.
  • the doctor rod rotating during operation causes considerable wear on the doctor bed.
  • the material and manufacturing intensive doctor beds therefore have to be replaced at regular intervals.
  • the exchange causes considerable costs. To those caused by wear
  • the roller doctor metering system according to German patent application 10045515 has a holder with a groove into which the doctor bed is inserted can be used with the inserted doctor rod.
  • the doctor bed is designed to be as small a wear part as possible.
  • the invention is therefore based on the object of improving a doctor blade metering system according to DE 10045515 so that the doctor bed can be easily replaced with an inserted doctor rod.
  • the squeegee rod has a diameter of less than 25 mm
  • the squeegee bed is inserted into a groove of the holder (6) on the front side
  • the ratio of the cross-sectional area (measured in mm 2 ) of the squeegee bed to the diameter (measured in mm) ) the doctor rod is less than 60 mm, preferably less than 30 mm
  • the holder is made of a plastic material and is designed in the manner of a clamp with at least one rearwardly extending clamp leg and a hinge point, the holder groove receiving the doctor bed forming the clamp mouth and
  • a clamping hose is arranged on a clamp leg and presses the groove walls of the holder groove against each other.
  • the doctor bed is designed as the smallest possible wear part, it therefore requires less material than the known doctor beds.
  • the lower use of materials also allows the use of high-quality - i.e. more expensive - materials, which enable a longer service life when coating.
  • the holder is not a wearing part. It can thus be produced in a more complex manner, for example by machining. It can be designed so that it can be used universally and can accommodate different doctor beds for doctor bars with different diameters.
  • the division of the holding system for the doctor rod into two parts, namely doctor bed and holder enables the use of different material combinations in order to improve the operating behavior of the metering system.
  • the doctor bed can be designed to be particularly elastic for improved sealing behavior with respect to the doctor rod and particularly wear-resistant while the holder is made of a harder material so that its increased rigidity prevents vibrations of the dosing system.
  • the design of the holder in the manner of a clamp with a pressure hose, which presses against a clamp leg and thus the groove walls of the holder groove against one another, makes it possible to relax the groove of the holder for changing the doctor bed by reducing the pressure in the clamping hose.
  • the clamping hose is under pressure to hold the squeegee bed with the inserted squeegee rod.
  • the configuration of the metering system according to the invention has the further advantage that the tension in the clamping tube can be used to regulate the tension with which the doctor rod is held in the doctor bed.
  • the friction, dependent on the tension, of the doctor rod when it rotates in the doctor bed can thus be set to the lowest possible values.
  • doctor rods with a small diameter (10 mm - 12 mm) can be used, which are driven at the ends without the torsional forces being too great.
  • disturbing vibrations of the doctor rod during operation can be prevented by changing the damping of the system via the pressure in the clamping hose.
  • the system advantageously has an additional actuator with which the operating behavior can be positively influenced with the hose pressure as a manipulated variable.
  • FIG. 1 shows a cross section through an embodiment of a doctor blade metering system according to the invention
  • FIG. 2 shows a cross section through another embodiment
  • FIG. 3 shows the change of the doctor bed in the embodiment according to FIG. 2.
  • the dosing system shown in the figures is part of a device for coating a paper or cardboard web 1 with coating color. It is preferably a so-called roller scraper system in which the web 1 is supported in the area of the metering system by a counter roller 2.
  • the doctor blade metering system can also be used for indirect metering, in which a pre-metered film of coating material is first applied to a roller and then released by the latter onto the web.
  • Another application is in so-called roller doctor systems, in which the web is guided over the doctor rod in a free section without support from a roller.
  • a known application system (nozzle applicator, roller applicator, etc.) is arranged, of which coating color is applied in excess to the web 1.
  • the doctor blade metering system contains as a metering element a doctor rod 3 which is rotatably mounted in a doctor bed 4 which is partially open towards the web 1 by means of a rotary drive.
  • the outer surface of the doctor rod 3 is either smooth or provided with circumferential grooves. Their diameter is 6mm- 25mm. Preferred diameters are 9.75 mm, 10.00 mm, 12.00 mm, 12.7 mm, 13.65 mm, 15.00 mm, 15.87 mm and 16.00 mm.
  • the axial length of the doctor rod 3 corresponds to the working width of the coating device, which can be up to 10 m.
  • the doctor rod is preferably made of stainless steel and its outer surface is coated to be wear-resistant, for example chrome-plated or coated with ceramic.
  • the doctor bed 4 is preferably made of an at least limited elastic material. According to one embodiment, it is made of an elastomer (rubber or plastic), preferably of polyurethane. The hardness of the material from which the doctor bed 4 is made is then 50 Shore A to 65 Shore D, preferably between 85 Shore A and 95 Shore A. The material is therefore relatively elastic, so that the bed 4 seals against the doctor rod 3 can create to prevent penetration of coating color into the bed 4.
  • the doctor bed 4 has a groove 18 into which the doctor rod 3 is inserted, the doctor bed 4 enclosing the doctor rod 3 in an angular range of at least 180 ° so that the doctor rod 3 is held securely.
  • doctor bed 4 from polyethylene.
  • the machining to the required dimensional accuracy is then carried out in a machining process, in particular by milling.
  • the ratio of the cross-sectional area (measured in mm 2 ) of the doctor bed (4) to the diameter (measured in mm) of the doctor rod (3) is less than 60 mm, preferably less than 30 mm.
  • the ratio of the cross-sectional area of the doctor bed (4) to the diameter of the doctor rod (3) is preferably 10 mm to 25 mm.
  • the doctor bed 4 is designed with the same cross section over the working width of the coating device, that is to say the length of the doctor rod 3.
  • In the doctor bed 4 at least one channel 5 open to the doctor rod 3 is incorporated, into which water is introduced as a lubricant and cleaning agent during operation.
  • the doctor bed 4 is removably inserted in a groove 18 of a holder 6 which is open towards the web 1, as is particularly clearly shown in FIG.
  • the cross-sectional area of the groove 18 is adapted to the outer contour of the doctor bed 4, so that it is held securely by friction or positive locking.
  • the holder 6 is made of a plastic material, for example of polyethylene or polyurethane.
  • the hardness of the material is 50 Shore A to 65 Shore D. It is designed in the manner of a clip with at least one clip leg 13 extending to the rear and a joint point 15.
  • the holder groove 18 receiving the doctor bed 4 forms the clamp mouth.
  • a clamping hose 16 which presses the groove walls of the holder groove 18 against one another, is arranged on a clamp leg 13 and can be pressurized with compressed air.
  • the holder 6 is designed with two rearwardly extending bracket legs 13, 14.
  • the clamping hose 16 is arranged between the two clamp legs 13, 14.
  • the holder 6 contains only one clamp leg 13.
  • the clamping hose 16 is supported on the main part of the holder 6, into which the groove 18 is incorporated. It presses the clamp leg 13 to clamp the doctor bed 3 above and thus the upper groove wall of the holder groove 18 downwards.
  • a region of the holder 6 between the clamping hose 16 and the holder groove 18 is preferably designed as a weak point with a reduced thickness as the articulation point 15.
  • a slot 17 is incorporated into the holder 6, which extends from the region of the clamping hose 16 in the direction of the holder groove 18.
  • the holder 6 is in the region between the holder groove 18 and the clamping hose 16 designed accordingly thin.
  • the thickness of the holder 6 at the weak point, measured radially to the doctor rod 3 in the direction of the clamping tube 16 - in FIG. 1 the distance between the slot 17 and the doctor bed 4 - is 0.5 mm to 10 mm, preferably 1 mm to 3 mm. This ensures sufficient elasticity of the clamp legs 13, 14.
  • the holder 6 is fixed in a known manner with its foot 8 on a support beam 7 as part of the frame of the metering system.
  • the holder 6 is clamped with a rotatable clamping element 9 which extends across the working width of the coating device in a groove of an angled bearing part 10 which is open towards the foot 8 and which is screwed onto the support beam 7.
  • the foot 8 widens to form a fastening part 21 which is screwed onto the support beam 7 by means of screws 22.
  • a pressure hose 12 which is supported on the frame of the system and presses the holder 6 in the direction of the doctor bed 4, is arranged on the back of the holder and extends across the length of the holder 6.
  • the pressure hose 12 is supported on the frame of the system and presses it on the back of the holder 6 with the doctor bed 4 and the doctor rod 3 in the direction of the web 1 or roller to be coated, in order to build up the desired contact pressure of the doctor rod 4 against the web 1 or roller , So that this is possible, the foot 8 of the holder 6 is designed to be of limited elasticity in one area. In the exemplary embodiments, the elasticity is brought about by a thinner cross section between the fastening point on the bearing part 10 and the main part with the holder groove 18.
  • the pressure hose 12 is attached at the top to the vertical part of the bearing part 10, in the embodiment according to FIG. 1, the pressure hose 12 is attached at the top to the vertical part of the bearing part 10, in the embodiment according to FIG.
  • the squeegee bed 4 with the inserted squeegee rod 3 is inserted into the groove 18 of the holder 6 when the machine is at a standstill, while the clamping hose 16 is depressurized. As shown in FIG. 3, the clamp leg 13 is prestressed in such a way that the groove 18 opens automatically somewhat without pressure in the clamping hose 16. After inserting the doctor bed 4, compressed air is introduced into the clamping tube 16. As a result, the groove walls of the holder 6 are pressed against one another, and the doctor bed 4 with the doctor rod 3 is fixed in the holder 6. The pressure is chosen so that on the one hand a secure hold of the bed 4 and the rod 3 is ensured, on the other hand the friction of the doctor rod 3 is sufficiently low. If vibrations occur during operation, the pressure for damping is varied.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Confectionery (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP03720149A 2002-03-13 2003-03-07 Systeme de dosage a racle Expired - Lifetime EP1485209B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10211302 2002-03-13
DE10211302 2002-03-13
PCT/DE2003/000738 WO2003078077A1 (fr) 2002-03-13 2003-03-07 Systeme de dosage a racle

Publications (2)

Publication Number Publication Date
EP1485209A1 true EP1485209A1 (fr) 2004-12-15
EP1485209B1 EP1485209B1 (fr) 2005-08-03

Family

ID=27815644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03720149A Expired - Lifetime EP1485209B1 (fr) 2002-03-13 2003-03-07 Systeme de dosage a racle

Country Status (9)

Country Link
US (1) US6911085B2 (fr)
EP (1) EP1485209B1 (fr)
JP (1) JP4376633B2 (fr)
KR (1) KR100977822B1 (fr)
CN (1) CN1325175C (fr)
AT (1) ATE301006T1 (fr)
AU (1) AU2003223848A1 (fr)
DE (2) DE50300916D1 (fr)
WO (1) WO2003078077A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009061033A1 (de) 2009-06-08 2010-12-09 Metso Paper, Inc. Rakeleinrichtung
US8539904B2 (en) 2009-06-08 2013-09-24 Metso Paper, Inc. Rod-bed assembly
EP2712960A1 (fr) 2012-09-27 2014-04-02 Metso Paper Inc. Ensemble tige d'ancrage
EP2808092A1 (fr) 2013-05-31 2014-12-03 Valmet Technologies, Inc. Ensemble d'ancrage pour rouleau
US9869061B2 (en) 2012-08-09 2018-01-16 Buschman Corporation Hinge/taper clamp rod holder insert
DE202018101092U1 (de) 2017-03-02 2018-03-08 Valmet Technologies Oy Rakelbett
US10465342B2 (en) 2012-08-09 2019-11-05 Buschman Corporation Hinge/taper clamp rod holder insert

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005033407A1 (fr) * 2003-10-09 2005-04-14 Btg Umv Coating Systems Aktiebolag Support pour berceau de barrette tournante
FI119390B (fi) 2003-12-22 2008-10-31 Metso Paper Inc Sauvakehto filmi-, päällystys- tai patosauvaa varten
SE526497C2 (sv) * 2003-12-30 2005-09-27 Akeboose Internat Ab Rakelbladssystem, rakelbladinspänningsanordning,kammarrakelsystem, tryckverk, förförande för att inspänna ett rakelblad och förfarande för att ansluta en inspänningsdel hos en kammarrakel
DE102004029565A1 (de) * 2004-06-18 2006-01-05 Voith Paper Patent Gmbh Rakelvorrichtung
DE102005029613A1 (de) * 2005-06-23 2007-01-04 Voith Patent Gmbh Vorrichtung zur Dosierung und/oder Egalisierung
SE531394C2 (sv) * 2005-08-30 2009-03-17 Mattssonfoeretagen I Uddevalla Ab Anordning och metod för bestrykning
EP1954880B1 (fr) * 2005-12-02 2014-01-15 Metso Paper, Inc. Palier d'axe, insert à utiliser dans un palier d'axe et procédé pour introduire un axe dans un palier d'axe
US20070214984A1 (en) * 2006-03-20 2007-09-20 Alfano James P Rod holder device
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
US9044769B2 (en) 2011-08-15 2015-06-02 Buschman Corporation Apparatus for coating a product and a system for indexing the product to be coated
DE102011112956A1 (de) 2011-09-13 2013-03-14 Horst Sprenger Gmbh Rakel-Dosiersystem
US20150182982A1 (en) * 2012-06-11 2015-07-02 Btg Ipi, Llc Insert and holder for a metering device
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
ITVE20130038A1 (it) * 2013-07-22 2015-01-23 Giorgio Trani Macchina e metodo per realizzare un nastro di materiale fibroso ad elevate estensibilita' longitudinale e trasveresale.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3022955C2 (de) * 1980-06-19 1982-12-16 Jagenberg-Werke AG, 4000 Düsseldorf Vorrichtung zum Regeln der Auftragsstärke beim Beschichten laufender Materialbahnen
FI111477B (fi) 1999-04-20 2003-07-31 Metso Paper Inc Päällystyslaite
DE10045515B4 (de) 2000-09-13 2011-02-10 Horst Sprenger Gmbh Rakel-Dosiersystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03078077A1 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009061033A1 (de) 2009-06-08 2010-12-09 Metso Paper, Inc. Rakeleinrichtung
DE102009026823A1 (de) 2009-06-08 2010-12-16 Metso Paper, Inc. Rakeleinrichtung
DE102009026823B4 (de) * 2009-06-08 2011-02-24 Metso Paper, Inc. Rakeleinrichtung
US8539904B2 (en) 2009-06-08 2013-09-24 Metso Paper, Inc. Rod-bed assembly
DE102009061033B4 (de) 2009-06-08 2021-11-11 Valmet Technologies, Inc. Rakeleinrichtung
US9869061B2 (en) 2012-08-09 2018-01-16 Buschman Corporation Hinge/taper clamp rod holder insert
US10465342B2 (en) 2012-08-09 2019-11-05 Buschman Corporation Hinge/taper clamp rod holder insert
EP2712960A1 (fr) 2012-09-27 2014-04-02 Metso Paper Inc. Ensemble tige d'ancrage
US9205450B2 (en) 2012-09-27 2015-12-08 Valmet Technologies, Inc. Rod-bed assembly
EP2808092A1 (fr) 2013-05-31 2014-12-03 Valmet Technologies, Inc. Ensemble d'ancrage pour rouleau
DE202018101092U1 (de) 2017-03-02 2018-03-08 Valmet Technologies Oy Rakelbett

Also Published As

Publication number Publication date
WO2003078077A1 (fr) 2003-09-25
CN1325175C (zh) 2007-07-11
US20050039676A1 (en) 2005-02-24
EP1485209B1 (fr) 2005-08-03
DE10390987D2 (de) 2005-01-27
KR20050014784A (ko) 2005-02-07
DE50300916D1 (de) 2005-09-08
US6911085B2 (en) 2005-06-28
KR100977822B1 (ko) 2010-08-25
ATE301006T1 (de) 2005-08-15
AU2003223848A1 (en) 2003-09-29
JP2005519753A (ja) 2005-07-07
JP4376633B2 (ja) 2009-12-02
CN1524018A (zh) 2004-08-25

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