EP1789628A1 - Doctor blade device - Google Patents
Doctor blade deviceInfo
- Publication number
- EP1789628A1 EP1789628A1 EP05773944A EP05773944A EP1789628A1 EP 1789628 A1 EP1789628 A1 EP 1789628A1 EP 05773944 A EP05773944 A EP 05773944A EP 05773944 A EP05773944 A EP 05773944A EP 1789628 A1 EP1789628 A1 EP 1789628A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stop bar
- holder
- doctor
- leg
- bar
- 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
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
Definitions
- the invention relates to a squeegee device for dosing and / or leveling a liquid to pasty medium applied to a running substrate, the substrate being a running paper, board or other fibrous web for direct application and a transfer element for indirect application, which is the Application medium transfers to the fibrous web.
- the doctor device has a holder arranged on a support beam for receiving a doctor element serving for metering and / or leveling.
- Such squeegee devices find use in connection with commissioned works which, as said, serve the direct or indirect task.
- the liquid or pasty medium to be applied is applied to the fibrous web, for example via a pressure chamber with the aid of a doctor blade element designed as a doctor bar, a doctor bar or a doctor blade.
- doctoring devices for use in Enddosiervorraumen are known, with which a previously applied to the fibrous web layer of liquid or pasty medium is completely metered to a predetermined amount. Fer ⁇ tigdosieren also takes place by means of one of the above-mentioned doctor elements.
- the squeegee device can only serve to even out the medium previously applied in the desired amount, ie to equalize it.
- a squeegee device is known with a retaining strip for receiving a doctor blade, wherein the retaining strip in the immediate Einspann ⁇ area of the blade and / or in an adjacent region flexible in the direction transverse to the blade, but relatively rigid in the direction of the blade width
- the foot region of the retaining strip which serves for fixing to a fastening base, is in turn rigid.
- the retaining strip usually comprises a plurality of individual parts, which together form an integrated unit, which are arranged separately thereon from the actual support beam of the doctor device.
- a squeegee device with a retaining strip and a squeegee element attached thereto, which can be attached to or inserted into a supporting beam via mating contact surfaces.
- a device is provided, with which a holding force can be applied, which attracts the holding bar to the support beam or sucks when it is attached to the support beams over the contact surfaces or inserted into this.
- the device is designed such that the holding force can be switched off and switched on again.
- a doctor device which is provided with a seat for serving as a doctor element or associated leaf spring, which is clamped in its remote from the doctor blade of the doctor blade range by a clamping element, the leaf spring against presses a stop.
- a chute parallel to the chisel edge is provided on the seat of the leaf spring, with a series of swings along the chute. are arranged supply pulse generators, the cleaning of the blade seat ermög ⁇ light. By removing settling residues of the coating by means of vibrations, a perfect fit of the coating blade in its Ein ⁇ voltage is to be ensured.
- the hitherto known devices often offer only a poor makesmög ⁇ probability, since the internal space is not visible and difficult to access. This results in a high maintenance effort, as many parts were ⁇ removed to get to the cleaning of internal parts.
- the invention has the object of developing a squeegee device that is simple in construction and for cleaning or maintenance optimal accessibility of all functional parts offers and can be disassembled and quickly reassembled.
- a squeegee device which has a holder with a first and a second, movable stop bar.
- the movable stop bar of the fixed stop bar to the outside (in the direction of the running surface) is displaceable.
- the doctor element is clamped between fixed and movable stop bar.
- the holder for receiving the doctor element eg a machine-wide doctor blade or a rotatable doctor rod accommodated on a blade-shaped support element in a doctor bed
- further functional units are arranged independently on a support beam.
- the first or fixed and the second or the movable stop bar of the holder under force fix the doctor element, so that it scraps in the operating state, for example, the coating applied to a fibrous web coating and / or equalized.
- the holder may be configured such that the fixed stop bar is arranged lying inside and connected to the support beam. Over its longitudinal extension, this stop bar can be traversed over the entire width of außvor ⁇ direction with more or fewer recesses and bushings.
- the movable stop bar is obviously in the direction of the running surface to be coated or a counter-roller, that on the one hand it releases the doctor element in the opened state and on the other hand offers sufficient space for cleaning the holding elements. Also, in the maintenance state-that is, when the holder is open-a free flow of dyeing and cleaning agent is ensured by additional, for example, lateral openings, such as drainage holes or slots.
- An essential advantage of the solution according to the invention is therefore the optimum accessibility for cleaning the doctor blade holder. All functional parts of the doctor device and the internal parts, such as hoses and movable parts, can be viewed directly. In the maintenance state, a free color run is also ensured when the holder is open, as already explained above.
- the doctor device according to the invention has a simplified construction, which can be disassembled and quickly reassembled beyond. In addition, a compensation of different thermal expansion takes place, since the squeegee holder itself and an existing for the pressing of the squeegee element above the fixed stop bar pressure bar are not rigidly connected. As a result, at least one of the strips can expand freely.
- sliding surfaces may be formed on the common contact surfaces of the stop bar or the supporting beam, which constitute a linear guide.
- the linear guide is designed in the tolerances that no harmful amounts of coating or other impurities can reach the bearing surfaces in contact with each other.
- the movable stop bar can expand correspondingly freely under thermal load.
- the tolerances of the linear guide ensure a highly accurate, precise Auf ⁇ acceptance and clamping of the doctor element.
- the tolerances are in the range 0 to 1 mm, preferably 0 to 0.4 mm.
- sliding surfaces are suitable, which consist of bearing metal or plastic, which have a low coefficient of friction and are primarily used lubricant-free.
- the movable Antschleis ⁇ te be formed with three legs, which umge ⁇ the fixed stop bar U-shaped, wherein the first (vertical) leg te the actual movable stop bar te and in the closed state of the holder the doctor element clamped to the fixed stop bar.
- the second (vertical) leg is disposed in the holder inside and is acted upon by the holding force for the doctor element and the third (horizontal) leg connects the first and second legs rigidly together.
- the third leg which corresponds in U-shaped design as I said, the horizontal part, guided linearly through recesses in the lower region of the fixed stop bar and are in contact with the top of the supporting beam and be slidably mounted.
- a force acting on the second leg is thus transmitted via the connecting third leg on the first leg, there to hold the doctor element accordingly.
- An equally advantageous variant provides that for the movement of the stop bar and for generating the holding force, two pressure hoses supported within the doctor device on both side surfaces of the second leg are arranged.
- the first pressure hose which applies the closing force for fixing the doctor element, can be supported against a side face of the (fixed) stop bar rigidly connected to the support beam.
- the second pressure hose which releases the doctor element for a blade change or maintenance work, can bear against the side surface of a further support and retaining strip, which as a rule is also rigidly connected to the support beam.
- either the first or the second pressure hose can be pressurized with compressed air.
- the holding force, which presses the doctor element against the fixed stop bar in the operating state, is determined by the pressurization of the pressure hose, which is supported against the rear side surface of the stop bar.
- hydraulic or pneumatic cylinders can advantageously be arranged for moving the slide bar and for generating the holding force.
- Such devices are suitable both for linearly displaceable and for pivotable embodiments of the movable stop bar for fixing the Rakelele ⁇ element.
- Hydraulic or pneumatic cylinders offer appropriate Krasokrä ⁇ me in the structural design of the doctor device.
- a pressure bar for the doctor element can be arranged to act with an additional force on the support, wherein the pressure bar and the holder are not rigidly connected to one another.
- An example used coating blade is pressed by the force generated by a pressing force on the pressure bar, for example, to a counter-roller to adjust the layer or line thickness when applying paint on a fibrous web.
- the pressure bar and the holder which are not rigidly connected to one another, can each expand independently of one another in the case of thermal loading.
- the pressure bar can be segmented. As a result, the force over the entire length of the doctor element zonar and free of thermal stresses can be controlled accordingly.
- the outer contour of the holder and / or the pressure bar can be sealed without play by at least one removable cover plate against contamination.
- at least one removable cover plate against contamination.
- the at least one cover plate can be quickly removed and replaced by easily detachable connections. The removal of the cover provides optimum accessibility to all internal parts, such as Schläu ⁇ che and moving parts.
- An expedient embodiment of the cover plate may consist in that it is made of a flexible spring steel. In the installed state, a defined force is exerted on the pressure strip by a bias of the spring steel. The bias is generated by fastening screws, which are preferably in a row in the middle of the cover, i. are arranged in the Federblech ⁇ center.
- the thickness of the cover or the cover plate or the spring plate should be 0.2 to 8 mm, preferably 0.5 to 4mm.
- Fig. 2 shows the position of a doctor device during maintenance work with respect to a counter-roller
- FIG 3 shows a view of a doctor device whose slide bar is open towards the counter-roller.
- doctor device 1 shows a doctor device 1 of a direct application unit of a coater, in which a doctor element 3 in the form of a machine-width blade is set against a counter-roller 15.
- the doctor element 3 laces or equalizes coating material applied in excess to the desired layer thickness (coating weight in g / m 2 ) on a running paper, board or other fibrous web 16 wrapping the counter-roller 15 over at least part of its circumference.
- the stripped application medium is forwarded via a paint return 14 for further use.
- the doctor element 3 is fixed in a holder 2.
- the holder 2 comprises a fixed stop bar 5 and a movable stop bar 6.
- the stop bar 5 is optionally removable, spielmik via holding elements, arranged on a support beam 4.
- the stop bar 5 assumes an inboard position.
- the stop bar 6 is displaceably positioned away from the inner stop bar 5 by a linear guide.
- the slide-bearing linear guide consisting of a third leg 63 of the overall U-shaped stop bar 6, formed with corresponding sliding surfaces 7.
- a pressure bar 10 is arranged, with which the doctor element 3 can be acted upon with an additional force.
- the power is over one Lifting rod 11 of the externally arranged lifting device 12 transmitted to the pressure bar 10.
- the pressure bar 10 and the holder 2 are not rigidly connected. The segmentation of the pressure bar 10 extending into the image depth is not shown in the figures.
- the movable stop bar 6 is a total of three legs 61, 62, 63 barn ⁇ built, which surround the fixed stop bar 5 U-shaped.
- the first leg 61 forms the actual stop, which fixes the doctor element 3 from the outside.
- the vertical leg 61 is arranged on the outside in the direction of the counter roll 15 and supports the doctor element 3 by pressing against the fixed stop bar 5.
- two pressure hoses 81 are supported within the doctor device 1 and 82 disposed on both side surfaces of the second vertical leg 62, each of which can be pressurized with compressed air.
- the first pressure hose 81 is used for fixing, the second pressure hose 82 for releasing the clamping action.
- the stop bar 6 with its three legs 61, 62 and 63 can be integrally formed, but also a two-part design is conceivable. In the latter, ie two-part variant, the strip 6 would consist of the second vertical leg 62 and an angle-shaped component in which the first and third legs 61 and 63 form this angle-shaped common component.
- the doctor device 1 is moved away from the counter-roller 15 for maintenance, whereby the entire of the counter-roller 15 facing front is accessible. From there, in particular the squeegee element 3 and the parts of the holder 2 are freely accessible.
- FIG. 3 likewise shows, as in FIG. 2, the doctoring device 1 pivoted away from the counter-roller 15 for cleaning or maintenance purposes, but with the holder 2 or the stop bar 6 opened toward the counter-roller 15.
- the second pressure hose 82 which is supported against the supporting and retaining strip 9, acted upon with compressed air.
- the third leg 63 which is designed as a linear guide, is the clamping action of the first Leg 61 lifted and the squeegee element 3 released. In this position, therefore, the squeegee blade designed as a squeegee element 3 is notmaschinezeich ⁇ net.
- a removable cover plate 13 which preferably consists of a prestressed, flexible spring plate and which is angeord ⁇ net over the pressure bar 10
- the doctor device 1 is freely accessible after removing the plate 13 from the Ober ⁇ side.
- This flat design can also be a better quality control with regard to the detection and elimination of unwanted squeegee strip done because you now have access and insight up to the doctor blade or the blade tip.
- the surface 13a of the cover plate 13 is formed so that it is either insensitive to dirt or easily cleaned.
- this surface 13a can either be cold-rolled or polished or ground.
- it may also be coated with an anti-adhesive medium, such as PTFE (Teflon), from which any beads will bead off or are easier to remove.
- An additional or alternating cooling, e.g. Incorporated cooling channels also prevent the adhesion of dirt.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004040622A DE102004040622A1 (en) | 2004-08-21 | 2004-08-21 | doctor device |
PCT/EP2005/053781 WO2006021484A1 (en) | 2004-08-21 | 2005-08-03 | Doctor blade device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1789628A1 true EP1789628A1 (en) | 2007-05-30 |
EP1789628B1 EP1789628B1 (en) | 2008-01-23 |
EP1789628B2 EP1789628B2 (en) | 2011-01-12 |
Family
ID=35134402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05773944A Not-in-force EP1789628B2 (en) | 2004-08-21 | 2005-08-03 | Doctor blade device |
Country Status (6)
Country | Link |
---|---|
US (1) | US8082875B2 (en) |
EP (1) | EP1789628B2 (en) |
CN (1) | CN100515582C (en) |
AT (1) | ATE384825T1 (en) |
DE (2) | DE102004040622A1 (en) |
WO (1) | WO2006021484A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004040622A1 (en) | 2004-08-21 | 2006-02-23 | Voith Paper Patent Gmbh | doctor device |
AT502824B1 (en) * | 2006-02-16 | 2007-06-15 | Bartelmuss Klaus Ing | Doctor blade holder detachable fixing device for paper production plant, has holder fixable at support in operating position, and pressure hose provided between holder and support and clamping holder to support |
EP2576082B1 (en) * | 2010-05-25 | 2014-07-16 | Valmet Technologies, Inc. | Method and apparatus for controlling a coating head, and a coating head |
DE102010037401A1 (en) * | 2010-09-08 | 2012-03-08 | Ctp Gmbh | application unit |
DE102011007321B4 (en) * | 2011-04-13 | 2013-03-07 | Metso Paper, Inc. | squeegee holder |
DE102012201378B4 (en) * | 2012-01-31 | 2015-10-08 | Koenig & Bauer Ag | Method for using a device for setting a doctor blade on a lateral surface of a rotatable roller |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2212238B1 (en) * | 1973-01-02 | 1976-05-14 | Alsacienne Constr Meca | |
DE2825907B2 (en) | 1978-06-13 | 1981-02-26 | Jagenberg-Werke Ag, 4000 Duesseldorf | Device for applying a coating to a material web |
DE3940450A1 (en) | 1989-12-07 | 1991-06-13 | Voith Gmbh J M | Squeegee device |
DE9109785U1 (en) * | 1991-08-07 | 1992-09-17 | J.M. Voith Gmbh, 7920 Heidenheim, De | |
FI91903C (en) | 1992-03-19 | 1994-08-25 | Valmet Paper Machinery Inc | Holder for a coating rod or coating blade |
DE4309002A1 (en) | 1993-03-20 | 1994-09-22 | Voith Gmbh J M | Dosing device for coating running webs, preferably made of paper or cardboard |
DE29601342U1 (en) | 1996-01-26 | 1996-03-14 | Voith Sulzer Papiermasch Gmbh | Doctor blade holder |
DE19619249A1 (en) * | 1996-05-13 | 1997-11-20 | Voith Sulzer Papiermasch Gmbh | Applicator for direct or indirect application of a liquid or pasty medium to a running material web |
DE19904112A1 (en) * | 1999-02-02 | 2000-08-03 | Voith Sulzer Papiertech Patent | Web coating station has two setting units to position the doctor blade upstream and downstream of it acting at different points from the blade edge to use less energy with a relatively high response speed |
US6202252B1 (en) * | 1999-06-03 | 2001-03-20 | Valmet Ltd. | Doctoring apparatus |
JP4921661B2 (en) * | 1999-06-22 | 2012-04-25 | トレス プロダクション アクティーゼルスカブ | Doctor blade system |
US6749725B1 (en) * | 1999-10-06 | 2004-06-15 | Metso Paper, Inc. | Blade holder for a doctor and a method for using the doctor |
FI109042B (en) * | 2000-09-29 | 2002-05-15 | Metso Paper Inc | Support list for a creator |
JP2002266880A (en) * | 2001-03-05 | 2002-09-18 | Minebea Co Ltd | Seal structure of ball bearing |
DE102004018770A1 (en) † | 2004-04-17 | 2005-11-03 | Voith Paper Patent Gmbh | Scraper blade pneumatic clamp for papermaking assembly incorporates secondary expansion hose |
DE102004040622A1 (en) | 2004-08-21 | 2006-02-23 | Voith Paper Patent Gmbh | doctor device |
-
2004
- 2004-08-21 DE DE102004040622A patent/DE102004040622A1/en not_active Withdrawn
-
2005
- 2005-08-03 EP EP05773944A patent/EP1789628B2/en not_active Not-in-force
- 2005-08-03 DE DE502005002691T patent/DE502005002691D1/en active Active
- 2005-08-03 WO PCT/EP2005/053781 patent/WO2006021484A1/en active IP Right Grant
- 2005-08-03 CN CNB2005800281470A patent/CN100515582C/en not_active Expired - Fee Related
- 2005-08-03 AT AT05773944T patent/ATE384825T1/en active
-
2007
- 2007-02-20 US US11/676,770 patent/US8082875B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006021484A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20070144377A1 (en) | 2007-06-28 |
DE102004040622A1 (en) | 2006-02-23 |
US8082875B2 (en) | 2011-12-27 |
WO2006021484A1 (en) | 2006-03-02 |
CN100515582C (en) | 2009-07-22 |
CN101006228A (en) | 2007-07-25 |
DE502005002691D1 (en) | 2008-03-13 |
EP1789628B2 (en) | 2011-01-12 |
EP1789628B1 (en) | 2008-01-23 |
ATE384825T1 (en) | 2008-02-15 |
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