WO1993017795A1 - Pressure strip for coating device - Google Patents
Pressure strip for coating device Download PDFInfo
- Publication number
- WO1993017795A1 WO1993017795A1 PCT/EP1993/000031 EP9300031W WO9317795A1 WO 1993017795 A1 WO1993017795 A1 WO 1993017795A1 EP 9300031 W EP9300031 W EP 9300031W WO 9317795 A1 WO9317795 A1 WO 9317795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- support bar
- scraper knife
- adjusting
- screw
- adjusting rod
- Prior art date
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
- B05C11/04—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 with blades
- B05C11/041—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 with blades characterised by means for positioning, loading, or deforming the blades
- B05C11/042—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 with blades characterised by means for positioning, loading, or deforming the blades allowing local positioning, loading or deforming along the blades
-
- 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 support bar for a scraper knife in devices for coating running material webs, in particular paper or cardboard webs, according to the preamble of patent claim 1 and a device for coating a running material web according to the preamble of patent claim 3.
- devices which have an application unit (roller or nozzle application unit) with which the coating material, for. B. coating color, is applied in excess to the web.
- a metering system arranged after the applicator with a scraper knife as metering element lifts off the excess to the desired coat weight, the height of the coat weight being adjustable by the contact pressure of the scraper knife against the counter roller. Below its tip, the scraper knife is supported by an adjacent support bar, which means that the contact pressure can be varied by moving and / or pivoting the clamped scraper knife foot.
- DE-OS 39 27 329 describes a generic coating device in which piezo translators are used as adjusting elements for the support bar.
- springs counteract the pressing of the support strip with the piezo translators, wherein the counterforce of the springs can be set.
- the invention is the. On the basis would be to create a generic support bar that enables a locally different setting of the contact pressure of the doctor blade, without the fact that at high web speeds, disturbances in the uniformity of the coating occur due to the forces acting on the doctor blade.
- the support bar is on the one hand so flexible that a sensitive adjustment of the contact pressure is possible, on the other hand it is stiff enough to absorb the forces acting on the scraper knife without disturbances in the coating weight.
- Another object of the invention is to provide a generic coating device in which the contact pressure of the doctor knife can be set locally differently and very precisely over the working width.
- the distance between the individual control points is selected so that the resilience of the support bar lies in a range that ensures both a sensitive adjustment of the contact pressure and sufficient stability.
- Claim 4 contains a particularly advantageous embodiment of the adjusting elements with which the support bar can be bent locally differently.
- the adjustment elements enable a play-free adjustment of the support bar without great design effort.
- the particularly advantageous embodiment according to claim 5 enables a coarse and a fine adjustment, the latter according to the differential screw principle. Another advantage is that a coarse setting without a difference can be used to set a findable reference position, from which the position is then fine-tuned when the difference is activated.
- Fig. 1 shows a longitudinal section through a support bar with the
- FIG. 2 shows a partially sectioned perspective view. Way of carrying out the invention
- the coating device has a driven counter roller 1, from which the material web 2 - a paper or cardboard web with a width of 8 m and more - is deflected. Excess coating material was applied to the material web 1 by a coating unit (not shown), which is doctored down to the desired coat weight by a metering system with an elastically bendable doctor knife 3 as metering element.
- the scraper knife 3 is clamped with its foot in a clamping bar 4 which can be displaced in the direction of the counter roller 1 and is supported on its side facing away from the counter roller 1 below the scraper knife tip by an elastically flexible support bar 5 in the direction towards the counter roller.
- the contact pressure of the scraper knife 3 against the counter-roller 1 can be adjusted by a relative displacement of the clamping bar 4 to the support bar 5 which extends over the entire web width.
- the support bar 5 has a uniform cross-section over its entire length - this corresponds to the maximum web width and thus the axial length of the counter-roller 1. Its edge which lies against the scraper knife 3 is pointed or rounded with a radius between 1 mm and 3 mm, in the example 2 mm.
- the cross section of the support bar 5 is rectangular and is adapted to a groove 6 of its holder 7 which is open towards the scraper knife 3 and in which the support bar 5 is movably supported radially with respect to the counter roller 1.
- the height of the support bar 5 measured tangentially to the counter roller 1 is approximately 20 mm, and its radially measured width of the part which is rectangular in cross section is approximately 10 mm.
- the support bar 5 is preferably made of chromium-nickel steel, alternatively it can e.g. B. made of carbon fiber reinforced plastics and / or coated wear-resistant.
- the guide in the groove 6 of the holder 7 allows the support bar 5 to bend in a bending plane which extends approximately radially to the counter-roller 1.
- the area moment of inertia l x measured perpendicular to the bending plane is Support bar 5 between 100 mm 4 and 5000 mm 4 , preferably between 800 mm 4 and 1200 mm 4 ; in the present example it is 1000 mm 4 .
- the support bar 5 can be bent across the working width to set a desired cross profile of the coating weight via a locally different contact pressure of the doctor knife 3, holes are made at regular intervals over the entire working width on the back - in the example, every 75 mm - in which the end of an adjusting rod 8 is screwed tight.
- the adjusting rods 8 are axially freely movable in bores of the base plate 9 of the holder 7, which has a rectangular notch at its end facing the scraper knife 3, which is covered to form the groove 6 by a cover plate 10 screwed onto the base plate 9.
- a sleeve 11 is drawn over the end of each adjusting rod 8 which extends from the bore of the base plate 9 and is supported on the base plate 9 with a bead-like widening.
- At least one plate spring 12 is drawn over the sleeve 11, which is supported on one side on the bead and on the other side on an adjusting nut 13 which is screwed onto the end of the adjusting rod 8.
- the adjusting nut 13 has a bore adapted to the diameter of the sleeve 11 so that it can be moved over the sleeve 11 in order to be able to adjust the pretension of the plate spring 12 by rotation.
- the plate spring 12 presses the adjusting rod 8 with the preselected preload away from the counter roller 1, thus pulling on the support bar 5 in order to reduce the contact pressure on the scraper knife 3.
- an adjusting screw 14 with an internal bore with thread and an additional external thread is used, with which it is screwed into a thread of a holder 15 which is fastened to the base plate 9.
- a further screw 16 is fitted coaxially to the adjusting rod 8 and can be moved in the direction of the counter-roller 1 by rotation against the end of the adjusting rod 8.
- a washer 17 with a polygonal cross-section - in the example a hexagon - is fastened, which is attached centrally her attached ball cap presses against the end of the adjusting rod 8 in order to keep the friction when turning the screw 16 as low as possible.
- a cover 18 which can be screwed onto the upper side of the holder 15 extends from the latter via the disk 17, the adjusting nut 13 and the plate spring 12 to the cover plate 10 in order to seal the adjusting elements on the upper side.
- its underside is evenly adapted to the edges of the disk 17 and is in a form-fitting manner on its circumference in order to prevent the disk 17 and thus the screw 16 from turning when the adjusting screw 14 is turned.
- each adjusting element has its own screw-on cover 18, in order to enable the screw 16 to be turned for removal by removing a cover 18, as will be described in more detail below.
- the external thread of the adjustment screw 14 has a smaller pitch than its internal thread, which corresponds to the external thread of the screw 16.
- the screw 16 is slightly longer than the adjusting screw 14 in which it is mounted. its outer end face can thus be made to coincide with the outer end face of the adjusting screw 14 in order to establish a reference point.
- the adjusting screws 13 on the adjusting rods 18 are rotated into an axial position in which the desired prestressing of the plate springs 12 is present.
- the outer end faces of the screws 16 are congruent with the outer end faces of the adjusting screws 14.
- the rough adjustment is now carried out in such a way that, when the covers 18 are unscrewed, the adjusting screws 14 are rotated until a reference position is reached.
- the washers 17 with the ball caps press the adjusting rods 8 in the direction of the counter-roller 1 against the spring force of the plate springs 12.
- the screw 16 also rotates with the adjusting screw 14, since the friction on the ball cap of the washer 17 is negligibly small compared to the friction in the common thread with the adjusting screw 14.
- the covers 18 are placed and screwed on and prevent the screws 16 from now turning.
- the adjustment screw 14 is rotated further, the associated screw 16 changes its axial position relative to the adjustment screw 14 depending on the pitch of the common thread.
- the disk 17 only moves against the adjusting rod 8 or away from it with the difference in the thread pitches on the outside and inside on the adjusting screw 14, as a result of which the support bar 5 can be adjusted very precisely in the respective areas.
- the adjustment mechanism of the support bar 5 is free of play, since it is always adjusted with or against the spring force of the tensioned disc springs 12.
- the reference point selected in the rough setting can be found again simply by turning the adjusting screw 14 until its end face is again congruent with the end face of the screw 16.
- markings can be made on the end faces of both screws 14, 16, which are made to coincide.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5515272A JPH06507576A (en) | 1992-03-11 | 1993-01-09 | Support strips for coating equipment |
DE59306569T DE59306569D1 (en) | 1992-03-11 | 1993-01-09 | SUPPORT BAR FOR A COATING DEVICE |
EP93902160A EP0583437B1 (en) | 1992-03-11 | 1993-01-09 | Pressure strip for coating device |
FI934967A FI108524B (en) | 1992-03-11 | 1993-11-10 | Pressure list for a coating device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4207731A DE4207731A1 (en) | 1992-03-11 | 1992-03-11 | SUPPORT BAR FOR A COATING DEVICE |
DEP4207731.1 | 1992-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993017795A1 true WO1993017795A1 (en) | 1993-09-16 |
Family
ID=6453789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/000031 WO1993017795A1 (en) | 1992-03-11 | 1993-01-09 | Pressure strip for coating device |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0583437B1 (en) |
JP (1) | JPH06507576A (en) |
AT (1) | ATE153569T1 (en) |
CA (1) | CA2102287A1 (en) |
DE (2) | DE4207731A1 (en) |
ES (1) | ES2105216T3 (en) |
FI (1) | FI108524B (en) |
WO (1) | WO1993017795A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995017550A1 (en) * | 1993-12-21 | 1995-06-29 | Beloit Technologies, Inc. | Continuous adjustable backing bar for profiling coater blade |
GB2305873B (en) * | 1995-10-07 | 1999-06-02 | Crabtree Gateshead Ltd | Roll cleaning assembly |
EP0920917A2 (en) | 1997-12-05 | 1999-06-09 | Jagenberg Papiertechnik GmbH | Pneumatically actuated controlling element, in particular for adjusting the transverse coating profile in apparatus for coating webs of paper or cardboard |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4334556A1 (en) * | 1993-10-11 | 1995-04-13 | Jagenberg Ag | Device for coating a material web, in particular a paper or cardboard web |
DE4334555C2 (en) * | 1993-10-11 | 2003-06-26 | Jagenberg Papiertech Gmbh | Mount for a squeegee rod |
US5597415A (en) * | 1995-02-09 | 1997-01-28 | Voith Sulzer Paper Technology North America, Inc. | Profiling bar for a web coating device |
DE19734718A1 (en) * | 1997-08-11 | 1999-02-18 | Voith Sulzer Papiermasch Gmbh | Web coating applicator |
NL1007246C2 (en) * | 1997-08-26 | 1999-03-01 | Stork Brabant Bv | Screen printing machine for textiles |
DE29716647U1 (en) * | 1997-09-17 | 1997-10-30 | Voith Sulzer Papiermasch Gmbh | Pressure bar |
DE19755411A1 (en) | 1997-12-12 | 1999-06-17 | Voith Sulzer Papiertech Patent | Doctor device |
DE19812929A1 (en) * | 1998-03-24 | 1999-09-30 | Voith Sulzer Papiertech Patent | Machine continuously metering and leveling coating of fluid or viscous material |
DE19827234A1 (en) * | 1998-06-18 | 1999-12-23 | Voith Sulzer Papiertech Patent | Coating station for the application of a medium to a moving web surface |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2825907B2 (en) * | 1978-06-13 | 1981-02-26 | Jagenberg-Werke Ag, 4000 Duesseldorf | Device for applying a coating to a material web |
EP0307618A1 (en) * | 1987-09-04 | 1989-03-22 | JAGENBERG Aktiengesellschaft | Apparatus for coating a web material moving around a counter roll |
DE3927329A1 (en) * | 1989-08-18 | 1991-02-21 | Jagenberg Ag | DEVICE FOR COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
DE3934986A1 (en) * | 1989-10-20 | 1991-04-25 | Jagenberg Ag | Doctor blade adjustment - has setting motor with selective coupling to adjustment units for local and automatic setting while working |
DE9112595U1 (en) * | 1991-06-15 | 1991-11-28 | J.M. Voith Gmbh, 7920 Heidenheim, De |
-
1992
- 1992-03-11 DE DE4207731A patent/DE4207731A1/en not_active Withdrawn
-
1993
- 1993-01-09 DE DE59306569T patent/DE59306569D1/en not_active Expired - Lifetime
- 1993-01-09 CA CA002102287A patent/CA2102287A1/en not_active Abandoned
- 1993-01-09 EP EP93902160A patent/EP0583437B1/en not_active Expired - Lifetime
- 1993-01-09 AT AT93902160T patent/ATE153569T1/en not_active IP Right Cessation
- 1993-01-09 ES ES93902160T patent/ES2105216T3/en not_active Expired - Lifetime
- 1993-01-09 WO PCT/EP1993/000031 patent/WO1993017795A1/en active IP Right Grant
- 1993-01-09 JP JP5515272A patent/JPH06507576A/en active Pending
- 1993-11-10 FI FI934967A patent/FI108524B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2825907B2 (en) * | 1978-06-13 | 1981-02-26 | Jagenberg-Werke Ag, 4000 Duesseldorf | Device for applying a coating to a material web |
EP0307618A1 (en) * | 1987-09-04 | 1989-03-22 | JAGENBERG Aktiengesellschaft | Apparatus for coating a web material moving around a counter roll |
DE3927329A1 (en) * | 1989-08-18 | 1991-02-21 | Jagenberg Ag | DEVICE FOR COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
DE3934986A1 (en) * | 1989-10-20 | 1991-04-25 | Jagenberg Ag | Doctor blade adjustment - has setting motor with selective coupling to adjustment units for local and automatic setting while working |
DE9112595U1 (en) * | 1991-06-15 | 1991-11-28 | J.M. Voith Gmbh, 7920 Heidenheim, De |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995017550A1 (en) * | 1993-12-21 | 1995-06-29 | Beloit Technologies, Inc. | Continuous adjustable backing bar for profiling coater blade |
GB2305873B (en) * | 1995-10-07 | 1999-06-02 | Crabtree Gateshead Ltd | Roll cleaning assembly |
EP0920917A2 (en) | 1997-12-05 | 1999-06-09 | Jagenberg Papiertechnik GmbH | Pneumatically actuated controlling element, in particular for adjusting the transverse coating profile in apparatus for coating webs of paper or cardboard |
Also Published As
Publication number | Publication date |
---|---|
ES2105216T3 (en) | 1997-10-16 |
EP0583437A1 (en) | 1994-02-23 |
ATE153569T1 (en) | 1997-06-15 |
FI934967A (en) | 1993-11-10 |
CA2102287A1 (en) | 1993-09-12 |
JPH06507576A (en) | 1994-09-01 |
EP0583437B1 (en) | 1997-05-28 |
FI934967A0 (en) | 1993-11-10 |
FI108524B (en) | 2002-02-15 |
DE59306569D1 (en) | 1997-07-03 |
DE4207731A1 (en) | 1993-09-16 |
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