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WO1996015320A1 - Appareillage de couchage - Google Patents

Appareillage de couchage Download PDF

Info

Publication number
WO1996015320A1
WO1996015320A1 PCT/DE1995/001562 DE9501562W WO9615320A1 WO 1996015320 A1 WO1996015320 A1 WO 1996015320A1 DE 9501562 W DE9501562 W DE 9501562W WO 9615320 A1 WO9615320 A1 WO 9615320A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
doctor
roller
coating device
squeegee
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.)
Ceased
Application number
PCT/DE1995/001562
Other languages
German (de)
English (en)
Inventor
Klaus Kubik
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.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
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
Application filed by Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Priority to EP95937753A priority Critical patent/EP0791105B1/fr
Priority to DE59504706T priority patent/DE59504706D1/de
Publication of WO1996015320A1 publication Critical patent/WO1996015320A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs

Definitions

  • the invention relates to a coating device of the type corresponding to the preamble of claim 1.
  • Coating devices of this type are used to uniformly spread out a thin coating applied to a running web of material.
  • web should be understood web-like substrates of all kinds, e.g. Paper and cardboard webs, nonwovens, woven or other textile webs, plastic or metal foils.
  • Very high demands are often placed on the uniformity of the "stroke”. This is particularly the case in the paper sector because the thickness of the coating, which varies across the width of the web, is noticeable in the quality of the paper and its further processing, in particular its printability.
  • the uniformity of the coating is made more difficult by the large width of the paper webs of 8 and more meters.
  • the invention is therefore based on the object of improving an overall coating device with regard to the uniformity of the stroke that can be achieved.
  • the support structure supporting the squeegee is thus designed like a hydraulically internally supported roller - 2 - which, however, does not rotate the roller or doctor tube.
  • This makes it possible to precisely influence the position of the doctor blade edge relative to the web clinging to the roller.
  • the large widths of paper webs for example, even the low contact pressures of a doctor blade edge and in particular the weight of the doctor blade and the roller lead to deviations in the shape of the roller from a straight cylinder. Straightness is not even important.
  • Dimensional for a coating thickness that is uniform over the web width is an optimal active adaptation to the course of the substrate, ie generally to the course of the wear of a goods by means of a roller. This can be brought about by corresponding actuation of the hydraulic support device.
  • DE 29 35 413 C2 shows a hydraulically internally supported doctor tube, which thus forms the doctor blade itself and serves to even out a foam application applied to a rotating roller, which then runs in between the rotating roller circumference and a running web.
  • Wo 82/00165 shows a pair of rollers in which the support of a tubular roller, viewed axially, is located at the same location as the bearing center of a cross roller.
  • the roller tube rotates, while the invention is a fixed arrangement.
  • the hydraulic support device can be in the Claim 2 described be designed.
  • the opposing support devices result in a vibration-damped support of the doctor tube on both sides, the deflection being determined by the pressure difference.
  • the effective level should be the level of the contact pressure of the doctor blade, when interacting with a counter roller generally the connection level of the axes of the counter roller and the doctor tube.
  • doctor blade also experiences entraining forces through the material web, which stress the doctor tube perpendicular to the active plane. Such forces can be counteracted with the configuration according to claim 3.
  • the fluid pressure medium can be tempered, i.e. be heatable or coolable so that the doctor blade can be given a certain temperature (claim 4).
  • the hydraulic support device can be designed in a first possible version according to claim 6.
  • the feed lines are expediently designed according to claim 10.
  • the ⁇ module is usually fixed because both the roller and the doctor tube are made of steel.
  • the area moment of inertia can, however, be changed by appropriate shaping, ie dimensioning the cross sections depending on their radial position.
  • the feature of claim 11 makes it possible to respond to a change in the roll nip force by adjusting the pressure of the fluid medium, that is to say the oil or the compressed air, without the gap height at the squeegee edge suffering as a result.
  • the one ai set via a corresponding facility te gap remains over its length, or over its extent transverse to the web.
  • the feature of claim 12 ensures proper radial positioning of the doctor tube relative to the roller.
  • the positioning can be made adjustable according to claim 13.
  • the thickness of the applied coating can be measured continuously and the gap height can be controlled by a drive and a desired value of the thickness can be maintained automatically by closed-loop control. It is not excluded to mount the actual doctor blade as a separate part on the outer circumference of the doctor tube.
  • the doctor blade is integrally connected to the doctor tube, which can be achieved, for example, by machining the circumference of the doctor tube according to claim 16 and can be carried out in detail according to claim 17 or 18.
  • FIG. 1 shows a front view of a coating device, partly in a section through the axes of the roller or of the doctor tube;
  • FIG. 2 shows a view according to FIG. 1 from the left;
  • Fig. 3 shows a cross section along the line III-III in Fig. 1;
  • Fig. 4 shows a section along the line IV-IV in Fig. 1st
  • FIG. 5 shows a schematic front view of a further embodiment of a coating device
  • Fig. 6 shows a cross section along the line VI-VI in Fig. 5;
  • FIG. 7 shows a front view of a third embodiment
  • Fig. 8 shows a cross section along the line VIII- VIII in Fig. 7?
  • FIG. 9 shows a cross section corresponding to FIG. 6 or 8 through yet another embodiment.
  • the coating device designated 100 as a whole in FIG. 1 comprises two lateral roller stands 1, 2, in which a roller 3 is mounted on its roller journals 3 'in lateral bearings 4, the central planes of which in planes 5 and 5 perpendicular to the roller axis W. 6 are located.
  • the roller 3 projects with its pin 3 'on the left side in FIG. 1 at 3 "laterally above the roller stand 1 and there has a wedge 23 arranged in a groove, which can serve as a drive connection.
  • the bearings 4 are in bearing bodies 7 2, which have an approximately square plan in a plane perpendicular to the roller axis W.
  • the bearing body 7 bears against an upper horizontal boundary 8 of a rectangular section of the machine stand 1 or 2, and a horizontal boundary surface 9 lies opposite it On this boundary surface 9 there is a pneumatic pressure element 11, which acts from below against the bearing body 12 of a doctor tube, designated as a whole by 13.
  • the doctor tube 13 extends across the width of the web 10 and beyond into the roller stand 1, 2, where it is held in the bearing bodies 12.
  • the length of the squeegee tube 13 is penetrated by a carrier 14, which leaves all around distance from the inner circumference 15 of the squeegee tube 13 and is supported at the ends by spherical surface bearings 16 on the inner circumference of the squeegee tube 13.
  • the doctor tube 13 is seated in this area in bores 17 of the bearing body 12, which has a continuous radial slot 18 at one point and can be clamped there by means of a clamping screw 19 around the outer circumference 20 of the doctor tube 13.
  • the bearing body 12 of the doctor tube 13 is supported by a wedge 30 from below against the underside 31 of the bearing body 7.
  • the wedge 30 has a flat upper side and at approximately equal distances from the connecting plane E of the axes of the roller 3 and the doctor tube 13 there are supporting zones 34, 35 of approximately semicircular cross section, which are in a corresponding semicircular recess 33 in the bearing body 12 concerns.
  • the bearing body 12 is not firmly connected to the bearing stand 1 or 2, but has a certain slight mobility, which results in a change in the distance between the bearing bodies 7 and 12 in accordance with the insertion depth of the wedge 30, which is achieved by means of the screw spindle 32 can be regulated.
  • the wedge 30 can, for example, have a wedge angle of 0.5 °.
  • the centers of the spherical surface bearings 16 are, seen axially, at the same location as the centers of the bearings 4 of the roller 3, i.e. they lie in the same vertical plane 5 and 6, which is perpendicular to the axis W of the roller 3 and the axis R of the doctor tube 13.
  • a hose 40 is attached to the carrier 14 on the side facing the roller 3 and extends in the axial direction over the working width of the roller 3, i.e. extends over the width of the web 10 and is compressed and closed at the ends between the inner circumference 15 of the doctor tube 13 shaped pieces 41, 42 which are connected to one another by radial screws 43.
  • the hose 40 can be filled with a fluid pressure medium, in particular hydraulic fluid, via a feed line 44.
  • hose 50 On the opposite side there is a corresponding the hose 50 is arranged, which can be filled with the fluid pressure medium via a feed line 54.
  • the tubes 40, 50 each have a starting angle of approximately 90 °. The resulting force acting against the roller 3 results from the pressure difference in the hoses 40, 50.
  • the doctor tube 13 has the cross-sectional shape shown in FIGS. 3 and 4.
  • the doctor tube 13 has a relatively large wall thickness and is on the side facing the roller 3 by mutually opposite sides of the connecting plane E of the axes of the roller 3 and the rakei tube 13 perpendicular to this in the same plane milled 37,38 flattened so that a web 39 remains between them, which extends parallel to the plane E and forms the doctor blade 60 with the doctor edge 45.
  • the cutouts 37, 38 with the web 39 are formed symmetrically on the two opposite sides of the doctor tube 13, so that the doctor tube 13 can be rotated through 180 ° and operated in both positions.
  • the course of the squeegee edge 45 can be adjusted by correspondingly pressurizing the hoses 40, 50 so that they follow the course of the opposite surface line Roller 3 adapts optimally. If the pressure changes, the adjustment is retained. As a result, a particularly uniform coating thickness can be produced on the web 10 that passes between the roller 3 and the doctor edge 45.
  • a modified coating device 200 is shown more schematically, in which a roller 3 interacts with a non-rotatable doctor tube 113, in which the support device working with a fluid pressure medium is formed by a longitudinal chamber 140 shaped like a cylindrical cylinder.
  • the longitudinal chamber 140 is formed on both sides of the active plane, ie on both sides Part of the plane E connecting the axes of the doctor tube 113 and the roller 3, longitudinal seals 104, 105 attached to the carrier 114 and end transverse seals 106, 107 attached to the ends of the working area of the doctor tube 113.
  • the seals bear against the inner circumference 115 of the doctor tube 113.
  • the longitudinal chamber 140 is located on the side of the squeegee gap 102 and forms a pressure chamber which supports the inner circumference 115 of the squeegee tube 113 upwards with force that is uniform over the working area per unit length. This should be indicated by the hatched representation.
  • the fluid pressure medium is fed via a line 144 in the form of a longitudinal bore of the carrier 114 and a connection bore at the right end of the longitudinal chamber 140 in FIG. 5 and discharged again through the line 154 at the left end of the longitudinal chamber 140 in FIG. 5.
  • a desired pressure can be maintained in the longitudinal chamber 140 by throttling a valve 155 arranged in the line 154.
  • Pressure medium passing from the longitudinal seals 104, 105 into the opposite longitudinal chamber 150 is likewise removed in a suitable manner by a line (not shown).
  • a counter-pressure can be maintained in the longitudinal chamber 150 by appropriate throttling, so that the pressure acting on the doctor blade 160 is based on the pressure difference.
  • doctor blade 160 It may be necessary to heat the doctor blade 160, generally to heat it. This can be done in such a way that the fluid pressure medium, usually hydraulic oil, acting in the longitudinal chamber 140 is removed from a storage container 120 by means of a pump 121 and passed through a heat exchanger 122 before it enters the roller via line 144 .
  • the temperature-controlled, usually heated pressure medium is removed again at the other end of the roller via line 154 and thus circulated, the pressure being maintained by valve 155.
  • the heat of the temperature-controlled pressure medium is applied to the inner circumference 115 of the doctor tube 113 and in this way the doctor blade 160 transferred.
  • FIG. 7 shows a coating device 300 which has been modified again with regard to the support device and which partially corresponds to the coating device 200 and of which only the doctor tube 113 is shown.
  • a longitudinal chamber 140 extending across the width of the working area, as in the coating device 200
  • twenty-three such support elements 140 are shown, but the number can also be larger or smaller.
  • the support elements 240 can be supplied with hydraulic pressure medium individually, in groups or together via a supply arrangement 243 running in the crosshead 114.
  • the lead arrangement 243 is only shown schematically by a single dashed line. If the support elements 240 are not supplied with hydraulic fluid together, the supply line arrangement consists of a number of individual lines corresponding to the number of groups or the support elements 240. By appropriately loading the individual support elements 240, a desired support profile can be set, which does not necessarily include a constant support force per unit length over the length, as is the case with the longitudinal chamber 140 of FIG. 5.
  • a particular advantage of the coating device 300 with the support elements 240 lined up lies in the possibility of adapting the support area in the width direction of the web to its width, in that support elements 240 located outside the web width can be switched off. This is symbolized in FIG. 7 by the fact that the four supporting elements located outside the width of the web each have connecting lines which do not extend as far as the line Arrange array 243 as shown at 240 '.
  • the support elements 240 are closed cylindrical pistons which are supported on the pressure cushion which is formed by the pressure medium present in the cylinder chamber 244 formed in the recess 241.
  • the crosshead 114 bends slightly below the line load of the support elements 240 as shown in FIG. 7. As a result, the cylindrical recesses 241 deform somewhat. Some play must therefore be left or working on the support elements 240 with piston rings or other seals. These seals will not be hermetically sealed, so that some leakage liquid escapes from the support elements 240, which accumulates in the support element area which is sealed axially outward by the end cross seals 245 and is discharged via lines, not shown.
  • the temperature control medium 300 can also be supplied to the intermediate space between the inner periphery 115 of the doctor tube 113 and the carrier 114 via a line 144 in a heat exchanger 122, as is shown in FIGS Dashing is indicated.
  • the pressure of the heat transfer medium only needs to be sufficient for circulation, since in this case the force against the inner circumference 115 of the doctor tube 113 is applied by the support elements 240.
  • FIG. 9 shows a modified coating device 400 which is based on the principle of the pressure pad of the coating device 100.
  • the pressure pad 40 facing the roller 3 sets the squeegee 160 against the roller 3.
  • a linear force K is produced on the doctor blade 160 perpendicular to the plane ⁇ , which the doctor tube 113 seeks to take along parallel to the web and which is capable of bending without any special measures .
  • an additional pressure pad 70 is provided, which acts perpendicular to the plane E and stabilizes the doctor tube 113 against the force K and keeps it straight.
  • the doctor tube 113 is also relatively thick-walled.
  • plane millings 138 that are approximately parallel to the center and have axially parallel plane millings 138, the boundary surfaces of which are approximately perpendicular to the millings 138 and form the actual doctor blades 160.
  • roller 3 and doctor tube 13, 113 are designed such that the product of surface moment of inertia and modulus of elasticity is constant at each point of roller 3 and doctor tube 13, 113 along their axes and is the same for roller 3 and doctor tube 13, 113 .
  • the gap height h on the doctor blade 160 can be maintained uniformly over the working width even when the line force acting on the doctor tube 13, 113 in the roll gap changes, by adjusting the pressure in the support device.

Landscapes

  • Coating Apparatus (AREA)

Abstract

Appareillage de couchage (100) dans lequel la racle proprement dite (60) est formée sur la périphérie d'un tube à racle non rotatif (13) qui, de son côté, est traversé dans le sens longitudinal par un support non rotatif ménageant, sur son pourtour, un intervalle par rapport à la périphérie interne (15) dudit tube à racle (13). Des tuyaux fermés (40, 50) susceptibles de gonfler par passage d'un fluide sous pression sont disposés sur la largeur de travail, dans l'espace intermédiaire compris entre la périphérie intérieure (15) du tube à racle (13) et le support (14), respectivement du côté du cylindre (3) coopérant avec la racle (60), et sur le côté opposé. Les supports du cylindre (3) et du tube à racle (13) dans les montants latéraux du cylindre sont situés dans les mêmes plans verticaux (5, 6), par rapport aux axes (W,R) du cylindre (3) et du tube à racle (13). On peut ainsi ajuster de façon optimale le parcours de l'arête de la racle (45) par rapport au parcours de la génératrice opposée du cylindre (3).
PCT/DE1995/001562 1994-11-15 1995-11-13 Appareillage de couchage Ceased WO1996015320A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95937753A EP0791105B1 (fr) 1994-11-15 1995-11-13 Appareillage de couchage
DE59504706T DE59504706D1 (de) 1994-11-15 1995-11-13 Streichvorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440711A DE4440711A1 (de) 1994-11-15 1994-11-15 Streichvorrichtung
DEP4440711.4 1994-11-15

Publications (1)

Publication Number Publication Date
WO1996015320A1 true WO1996015320A1 (fr) 1996-05-23

Family

ID=6533335

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001562 Ceased WO1996015320A1 (fr) 1994-11-15 1995-11-13 Appareillage de couchage

Country Status (3)

Country Link
EP (1) EP0791105B1 (fr)
DE (2) DE4440711A1 (fr)
WO (1) WO1996015320A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20319977U1 (de) * 2003-12-23 2005-05-04 Gh-Beschichtungstechnik Gmbh Rakelwelle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI112878B (fi) * 2002-07-04 2004-01-30 Metso Paper Inc Menetelmä ja sovitelma päällystysaseman teräpalkin värähtelyjen vaimentamiseksi
CN114054304B (zh) * 2021-12-08 2024-04-16 中石化江钻石油机械有限公司 一种胶粘剂喷涂装置及喷涂方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935413A1 (de) * 1979-09-01 1981-03-19 Küsters, Eduard, 4150 Krefeld Verfahren und vorrichtung zum kontinuierlichen behandeln von textilen u.ae. warenbahnen
WO1982000165A1 (fr) * 1980-06-28 1982-01-21 Schiel C Cylindre de compression, dont la flexion est reglable
JPS58216754A (ja) * 1982-06-10 1983-12-16 Mitsubishi Heavy Ind Ltd 転写制御方法
JPS5922676A (ja) * 1982-07-29 1984-02-04 Hirano Kinzoku Kk ウエブの塗工装置
DE3817973A1 (de) * 1987-06-10 1988-12-22 Voith Gmbh J M Glaetteinrichtung eines auftragswerkes
EP0399976A2 (fr) * 1989-05-22 1990-11-28 Valmet Paper Machinery Inc. Procédé de régulation de la température d'un rouleau à réglage de flexion et système de régulation pour l'application du procédé
EP0411427A2 (fr) * 1989-08-01 1991-02-06 Eduard Küsters Maschinenfabrik GmbH & Co. KG Rouleau pour le traitement par la chaleur et par pression d'une matière en bande
JPH06262122A (ja) * 1993-03-11 1994-09-20 Nkk Corp 金属板の樹脂塗工装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI91367C (fi) * 1990-12-13 1994-06-27 Valmet Paper Machinery Inc Taipumakompensoitu teräpalkki

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935413A1 (de) * 1979-09-01 1981-03-19 Küsters, Eduard, 4150 Krefeld Verfahren und vorrichtung zum kontinuierlichen behandeln von textilen u.ae. warenbahnen
WO1982000165A1 (fr) * 1980-06-28 1982-01-21 Schiel C Cylindre de compression, dont la flexion est reglable
JPS58216754A (ja) * 1982-06-10 1983-12-16 Mitsubishi Heavy Ind Ltd 転写制御方法
JPS5922676A (ja) * 1982-07-29 1984-02-04 Hirano Kinzoku Kk ウエブの塗工装置
DE3817973A1 (de) * 1987-06-10 1988-12-22 Voith Gmbh J M Glaetteinrichtung eines auftragswerkes
EP0399976A2 (fr) * 1989-05-22 1990-11-28 Valmet Paper Machinery Inc. Procédé de régulation de la température d'un rouleau à réglage de flexion et système de régulation pour l'application du procédé
EP0411427A2 (fr) * 1989-08-01 1991-02-06 Eduard Küsters Maschinenfabrik GmbH & Co. KG Rouleau pour le traitement par la chaleur et par pression d'une matière en bande
JPH06262122A (ja) * 1993-03-11 1994-09-20 Nkk Corp 金属板の樹脂塗工装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 062 (C - 215) 23 March 1984 (1984-03-23) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 106 (C - 223) 18 May 1984 (1984-05-18) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 664 (C - 1288) 15 December 1994 (1994-12-15) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20319977U1 (de) * 2003-12-23 2005-05-04 Gh-Beschichtungstechnik Gmbh Rakelwelle

Also Published As

Publication number Publication date
DE59504706D1 (de) 1999-02-11
DE4440711A1 (de) 1996-05-23
EP0791105A1 (fr) 1997-08-27
EP0791105B1 (fr) 1998-12-30

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