EP1761341A1 - Doctor blade device - Google Patents
Doctor blade deviceInfo
- Publication number
- EP1761341A1 EP1761341A1 EP05739769A EP05739769A EP1761341A1 EP 1761341 A1 EP1761341 A1 EP 1761341A1 EP 05739769 A EP05739769 A EP 05739769A EP 05739769 A EP05739769 A EP 05739769A EP 1761341 A1 EP1761341 A1 EP 1761341A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- doctor
- head part
- doctor device
- foot
- hose
- 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
Links
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 235000011837 pasties Nutrition 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011324 bead Substances 0.000 claims description 5
- 239000000123 paper Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 2
- 244000043261 Hevea brasiliensis Species 0.000 claims 1
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 229920001973 fluoroelastomer Polymers 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229920003052 natural elastomer Polymers 0.000 claims 1
- 229920001194 natural rubber Polymers 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 229920000915 polyvinyl chloride Polymers 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 12
- 238000004140 cleaning Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Definitions
- the invention relates to a doctor device for metering and / or leveling a liquid to pasty medium applied to a running surface, the surface being a paper, cardboard or other fibrous web when the medium is applied directly and the surface of a transfer element when applied indirectly transfers the medium to the fibrous web.
- the application layer When applying, the application layer is usually applied in excess and must therefore be doctored to the desired coat weight, i.e. be dosed. If, on the other hand, the application medium is applied in the desired amount of coating, this can be done with the doctor device, i.e. only to be leveled or evened out with a doctor element installed in the doctor device.
- a metering unit or doctor device is known from EP-B1 0 682 728. It has a receiving part for receiving a rotatable, cylindrical doctor rod.
- a pressure hose or a multiplicity of individual hoses arranged in a row are arranged in the interior of the receiving part, with the aid of which the doctor rod is pressed against the surface to be treated.
- the installation and removal of the hose or the large number of hoses and the cleaning of the device is complicated and relatively lengthy.
- a clamping hose required to fix the squeegee device is fixedly arranged in or on a holder or a support body.
- the clamping hose is exposed to heavy soiling.
- the clamping hose makes cleaning more difficult overall also the holder, which is why a coating machine can be shut down for longer periods during cleaning work.
- the coating medium applied creates an uneven cross profile.
- the uneven cross profile leads to unplanned downtimes. It can also happen that the maintenance personnel destroy the clamping hose and also an existing pressure hose during cleaning work due to the poor accessibility of the dirt.
- the object of the invention is to provide an improved doctor blade device which is constructed and can be assembled more easily than before and whose cleaning is easier.
- the invention achieves the stated object by means of a doctor blade device according to the characterizing part of claim 1.
- the doctor blade device is constructed in a modular manner, as a result of which all wear-prone components are easily interchangeable.
- better flexibility is achieved through the possible variations of the clamping and pressure hose, foot section and head section with regard to material, design, choice of thickness, etc.
- the modular design allows ideal design freedom, with different sizes and shapes of the pressure and clamping hose being selectable, which enables different force application and control characteristics. For example, a doctor tube with a small diameter would also be assigned a pressure tube of a smaller dimension and, accordingly, a large tube diameter.
- Different hose strokes, which mean different travel ranges, as well as different hose geometries, which form different travel-force characteristics, can be realized by simply combining and replacing the components that are kept ready.
- the modular design according to the invention enables a variety of possible combinations between the head and foot sections to the desired extent.
- a head part can be placed on the same foot part, which has a different size of a receiving surface (rod holder) for a different selected doctor rod diameter and / or also has a different holder for different geometries and contours of the pressure hose. Optimized service lives of the components of the doctor device are thus possible.
- the foot part can also be designed differently, whereby different spring travel, different strengths or load capacities can be selected.
- doctor device can be installed and removed as a unit in the machine.
- a very quick change in particular a hose change outside the machine, can therefore be implemented.
- the hoses themselves are now less prone to failure.
- the proposed doctor device has a clamping hose which is accommodated in an easily accessible but nevertheless protected holder and one
- Compressed hose has, the clamp hose and the
- Coating machine can be removed.
- Said hoses are accommodated in U-shaped holders which only have smooth surfaces and, as said, are easily accessible from the outside and which are easier to manufacture and quick and thorough to clean. This considerably reduces the downtimes for cleaning the doctor blade holder.
- the operational reliability of the coating machine is increased, since the cross profile remains uniform as a result of the blade holder which is easy to clean. This eliminates unplanned downtimes.
- the doctor device has a polygon-like head part which has a doctor element in the form of a rotatable circular-cylindrical doctor rod and the pressure hose.
- Blade-like foot part is detachably connected to the head part.
- the foot section shows the Clamping hose on.
- the squeegee device can thus be easily disassembled into the head part and the foot part.
- the structural separation is preferably carried out outside the machine in which the doctor device is installed. This is advantageous for maintenance work and assembly / disassembly.
- the thermal expansion of the head part is advantageously decoupled from the thermal expansion of the foot part. Since the head part heats up considerably in operation compared to the foot part (through contactless dryers arranged above the fibrous web, which are mostly heated), the thermal expansion of the head part cannot be impeded by the decoupling between the head part and the foot part. This ensures a uniform pressure of the doctor element against the fibrous web to be coated. The uniform pressure of the doctor element in turn ensures a uniform cross profile of a coating medium to be applied and prevents one-sided wear of the doctor element. Of course, it is also alternatively or additionally possible that materials with different coefficients of thermal expansion are used for the head part and the foot part.
- the head part can have at least one groove in which the foot part engages.
- the head part and the foot part are positively connected to one another. Due to the positive connection, the head part and the foot part are firmly connected to each other and at the same time the thermal expansion of the head part and foot part is decoupled.
- the thickening which can preferably be designed as a spherical bead, either snap into the groove of the head part or the foot part can be inserted laterally into the head part or its groove or grooves.
- the foot part is only firmly connected to the head part at one point, that is to say only with one groove.
- the head part can expand more than the foot part without being hindered by the foot part.
- the fixed connection of the headboard and footboard at only one point can be positive or non-positive.
- the polygonal head part and the blade-like foot part can be formed in one piece. Then the whole unit can be made from solid. Polyethylene is a preferred material for this.
- a first holder for receiving the pressure hose is arranged on the head part.
- the holder for receiving the pressure hose can be connected in one piece or as a separate component to the head part.
- a second holder for receiving the clamping hose is arranged on the foot part.
- the holder for receiving the clamping hose can likewise either be formed in one piece with the foot part or be mounted on the foot part as a separate component.
- the one-piece versions reduce the assembly effort. If the bracket is a separate component, the same component can always be used for the foot part. The holder is then adapted to the clamping hose to be used.
- the foot and / or head part and the respective holder can expediently be used for the clamping and / or the pressure hose to be non-positively and / or positively connected.
- Positive connections are less expensive, whereas positive connections are easier to maintain, but above all they allow free elongation, ie thermal expansion of the head part. This expansion is also made possible by a combination of fixed and floating bearings.
- Screw, weld, rivet, adhesive, press, or cast connections can be used as connection options.
- the clamping hose and its holder can expediently be attached to the lower region of the foot part which can be clamped into a supporting body.
- the lower area should therefore be referred to as a clamp foot.
- thermoplastic e.g. glass fiber or carbon fiber reinforced plastic
- steel e.g. aluminum
- the brackets for the clamping and pressure hose can also be made from the same materials, the materials being chosen to be the same or different from the head and foot sections.
- the same materials, but also different hard materials, can be used for the head and foot sections. In this way, a selection can be made with regard to achieving an optimal seal between the rotating, cylindrical doctor rod and the head part receiving it, and an optimum load-bearing capacity of the foot part can be achieved.
- the invention also relates to a coating machine for applying a liquid to pasty application medium to a running surface, the running surface being the surface of a paper, cardboard or other fibrous web in the case of direct application and the surface of a transfer element, for example an application roller in the case of indirect application is that delivers the application medium to the fibrous web, which has one or more of claims 1 to 15.
- Glue, starch or pigment-containing coating color which can be liquid to pasty, is used as the application medium.
- the application itself takes place in an online or offline coating machine, with which the fibrous web is refined during its manufacture.
- the device according to the invention in particular the design as a so-called modular system, means a simple basic structure of the device with very good variation possibilities, good accessibility and optimal cleaning possibility.
- FIG. 1 shows a perspective top view of a first embodiment of the doctor device
- Fig. 3 is a top perspective view of a third embodiment of the doctor device.
- FIG. 1 shows a doctor-blade device 10 which is assembled in a modular manner and has a head part 11 and a foot part 12.
- the head part 11 is at the same time a receiving part for a rotatable circular-cylindrical doctor rod 13.
- a pressure hose 15 is inserted in a first holder 14 on the head part 11.
- the pressure hose 15 presses the head part 11, including the rotatable doctor rod 13 accommodated therein, against a fibrous web, also not shown here.
- a clamping hose 17 is arranged on the foot part 12 in a second holder 16.
- the squeegee device 10 is clamped in a support body (not shown here) by the clamping hose 17 and is to be referred to as “clamping foot” 40.
- the pressure hose 15 and the clamping hose 17 are both attached to the doctor device 10. Consequently, they can be removed from the carrier body together with the doctor device 10 during cleaning work, so that the doctor device can be cleaned quickly and thoroughly.
- the head part 11 and the foot part 12 are positively connected to one another.
- the head part 11 has a groove 18 on its lower wall 50, in which a bead 19 attached to the foot part 12 at the upper end engages.
- the foot part 12 can thus either be inserted laterally (from the end faces) into the groove 18 of the head part 11 or snap into the groove 18 from below.
- the head part 11 heats up more than the foot part 12 during operation, the head part 11 can expand unhindered due to the positive connection shown relative to the foot part 12. This ensures a uniform contact pressure of the doctor rod 13.
- the uniform contact pressure of the doctor rod 13 ensures a uniform profile of an applied medium on the material web made and at the same time an uneven wear of the doctor rod 13 avoided.
- the doctor rod 13 is seated in a rod holder 100, in which rinsing channels, not shown here, are arranged so that the doctor rod 13 does not run dry.
- FIG. 1 shows the same design for the pressure hose 15 and the clamping hose 17 and a doctor rod 13 of small diameter
- FIG. 1a shows a possible modification of the modular parts.
- the modified components have the suffix "a" here.
- FIG. 1a A substantially larger diameter of the doctor rod 13, here 13a, can be seen in FIG. 1a. Accordingly, the rod holder 100a is also dimensioned larger than the rod holder 100 from FIG. 1.
- FIG. 1 a instead of the round hoses shown in FIG. 1, each here an oval-shaped pressure hose 15 a, and clamping hose 17 a are shown. In the example shown, the hoses are accommodated with their height in both holders 14a and 16a. The other, but not numbered, components shown in FIG. 1 a have not been changed from the embodiment shown in FIG. 1.
- a doctor rod 13b is shown here, which again has a relatively small diameter, but pressure hoses of different sizes and shapes, i.e. Has pressure hose 15b and clamping hose 17b.
- the pressure hose 15b is oval and the clamping hose 17b is round.
- a further, but not shown, embodiment would of course be conceivable, in which again a larger doctor rod 13a and, for example, the pressing and clamping hose 15, 17 of the same shape and size are used. Other possible variations are conceivable.
- a doctor device 20 is shown in which a polygonal head part 21 and a blade-shaped foot part 22 are also positively connected to one another.
- the foot part 22 has two beads 29 which are present laterally at its upper end and which engage in grooves 28 provided on the head part 21.
- the head part 21 lies flat with its rear wall 60 on the upper part of the foot part 22.
- FIG. 3 shows a doctor device 30, in which a polygonal head part 31 and a blade-like foot part 32 are also made in one piece from the solid.
- a first holder 34 for a pressure hose 35 and a second holder 36 for a clamping hose 37 are mounted on the doctor device 30 as separate components. They can therefore be individually dimensioned according to the required clamping and contact forces.
- doctor rod 13, 13a, 13b 23, 33 which depending on the desired application can be provided with a smooth or grooved circumferential surface in the diameters 5 to 100 mm, preferably 8 to 40 mm, and in the adequately shaped rod holder 100, 100a , 100b of the head part thus formed is interchangeable with another.
- combinations in the selection of materials are also possible, in particular in order to influence the thermal parameters between the “warmer” head part and the colder foot and head part.
Landscapes
- Coating Apparatus (AREA)
- Paper (AREA)
- Clamps And Clips (AREA)
- Polarising Elements (AREA)
- Cereal-Derived Products (AREA)
- Beans For Foods Or Fodder (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004029565A DE102004029565A1 (en) | 2004-06-18 | 2004-06-18 | doctor device |
PCT/EP2005/052007 WO2005123269A1 (en) | 2004-06-18 | 2005-05-03 | Doctor blade device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1761341A1 true EP1761341A1 (en) | 2007-03-14 |
EP1761341B1 EP1761341B1 (en) | 2008-04-16 |
Family
ID=34966727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05739769A Active EP1761341B1 (en) | 2004-06-18 | 2005-05-03 | Doctor blade device |
Country Status (8)
Country | Link |
---|---|
US (1) | US8418645B2 (en) |
EP (1) | EP1761341B1 (en) |
JP (1) | JP4781353B2 (en) |
CN (1) | CN100475362C (en) |
AT (1) | ATE392267T1 (en) |
DE (2) | DE102004029565A1 (en) |
ES (1) | ES2306138T3 (en) |
WO (1) | WO2005123269A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2570194A1 (en) * | 2011-09-13 | 2013-03-20 | Horst Sprenger GmbH | Squeegee metering system |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004029565A1 (en) | 2004-06-18 | 2006-01-05 | Voith Paper Patent Gmbh | doctor device |
WO2009100344A2 (en) * | 2008-02-08 | 2009-08-13 | Kadant Web Systems, Inc. | Thermally adaptive surfaces for receiving thermal sprays |
DE102008000723A1 (en) * | 2008-03-18 | 2009-09-24 | Voith Patent Gmbh | doctor device |
DE102009026495A1 (en) | 2009-05-27 | 2010-12-02 | Voith Patent Gmbh | doctor device |
DE202010017343U1 (en) | 2010-07-01 | 2011-11-28 | Voith Patent Gmbh | pressure hose |
DE102010031470A1 (en) | 2010-07-16 | 2012-01-19 | Voith Patent Gmbh | Doctor blade device for dosing and equalizing application medium e.g. a coating color on running substrate e.g. surface of running paper or other fibrous web for direct application, comprises a doctor blade holder for doctor blade element |
CN105728256A (en) * | 2016-04-29 | 2016-07-06 | 玖龙纸业(太仓)有限公司 | Production device and production method for coated duplex board with grey back |
DE102022105510B4 (en) | 2022-03-09 | 2024-01-04 | Voith Patent Gmbh | Application nozzle, application mechanism and process |
DE102022105518B4 (en) | 2022-03-09 | 2024-03-21 | Voith Patent Gmbh | Application nozzle, application mechanism and process |
DE102022105636A1 (en) | 2022-03-10 | 2023-09-14 | Voith Patent Gmbh | Squeegee metering device |
DE102022112542A1 (en) | 2022-05-19 | 2023-11-23 | Voith Patent Gmbh | Device, use and method for dosing or leveling |
WO2023222299A1 (en) | 2022-05-19 | 2023-11-23 | Voith Patent Gmbh | Device, use and method for dosing or levelling |
DE102022126270A1 (en) | 2022-10-11 | 2024-04-11 | Voith Patent Gmbh | Device, use and method for dosing or equalizing |
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DE4433048A1 (en) * | 1994-09-16 | 1996-03-21 | Tzn Forschung & Entwicklung | Method and device for the continuous application of a coating to a material web |
DE29510486U1 (en) | 1995-06-30 | 1995-08-17 | Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim | Squeegee assembly |
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-
2004
- 2004-06-18 DE DE102004029565A patent/DE102004029565A1/en not_active Withdrawn
-
2005
- 2005-05-03 WO PCT/EP2005/052007 patent/WO2005123269A1/en active IP Right Grant
- 2005-05-03 CN CNB2005800197038A patent/CN100475362C/en active Active
- 2005-05-03 ES ES05739769T patent/ES2306138T3/en active Active
- 2005-05-03 AT AT05739769T patent/ATE392267T1/en active
- 2005-05-03 EP EP05739769A patent/EP1761341B1/en active Active
- 2005-05-03 JP JP2007515917A patent/JP4781353B2/en not_active Expired - Fee Related
- 2005-05-03 DE DE502005003758T patent/DE502005003758D1/en active Active
-
2006
- 2006-12-18 US US11/612,166 patent/US8418645B2/en active Active
Non-Patent Citations (1)
Title |
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See references of WO2005123269A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2570194A1 (en) * | 2011-09-13 | 2013-03-20 | Horst Sprenger GmbH | Squeegee metering system |
Also Published As
Publication number | Publication date |
---|---|
DE102004029565A1 (en) | 2006-01-05 |
CN1997459A (en) | 2007-07-11 |
US20070113780A1 (en) | 2007-05-24 |
DE502005003758D1 (en) | 2008-05-29 |
ES2306138T3 (en) | 2008-11-01 |
ATE392267T1 (en) | 2008-05-15 |
JP4781353B2 (en) | 2011-09-28 |
CN100475362C (en) | 2009-04-08 |
EP1761341B1 (en) | 2008-04-16 |
JP2008502467A (en) | 2008-01-31 |
WO2005123269A1 (en) | 2005-12-29 |
US8418645B2 (en) | 2013-04-16 |
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