EP0568674B1 - Racle du reservoir d'encre d'un element destine au transfert d'encre - Google Patents

Racle du reservoir d'encre d'un element destine au transfert d'encre Download PDF

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Publication number
EP0568674B1
EP0568674B1 EP92923767A EP92923767A EP0568674B1 EP 0568674 B1 EP0568674 B1 EP 0568674B1 EP 92923767 A EP92923767 A EP 92923767A EP 92923767 A EP92923767 A EP 92923767A EP 0568674 B1 EP0568674 B1 EP 0568674B1
Authority
EP
European Patent Office
Prior art keywords
chamber
ink
doctor blade
moulding
slot
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.)
Expired - Lifetime
Application number
EP92923767A
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German (de)
English (en)
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EP0568674A1 (fr
Inventor
Cornelis Gorter
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Namic BV
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Namic BV
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Publication date
Priority claimed from DE19914138807 external-priority patent/DE4138807C1/de
Application filed by Namic BV filed Critical Namic BV
Publication of EP0568674A1 publication Critical patent/EP0568674A1/fr
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Publication of EP0568674B1 publication Critical patent/EP0568674B1/fr
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    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • the invention relates to a device for coating running material webs and relates in particular to an ink chamber doctor blade according to the preamble of claim 1.
  • the printing ink is supplied in the lower part of the ink chamber either in the middle or at the two chamber ends and then flows in the doctor blade box in the longitudinal direction parallel to the anilox roller with swirling through the rotating anilox roller to in the upper part of the ink chamber to be led away.
  • the single-chamber squeegee has a positive squeegee and a negative squeegee, which strips off the excess ink in the upper part of the ink chamber when the anilox roller rotates at a peripheral speed of, for example, 100 m / min.
  • the disadvantage here is that the very small cups on the periphery of the anilox roller gradually fill with paint residues and old printing ink over time and then can no longer absorb enough new printing ink, which considerably deteriorates the print quality.
  • the anilox rollers therefore have to be brushed and cleaned at regular shorter intervals, for example weekly, with very aggressive means, which is very labor-intensive given the extremely small grid spacing of the cells if perfect cleaning is to be achieved.
  • ink chamber doctor blades In the known ink chamber doctor blades, it is largely left to chance whether or not a well of the anilox roller is filled with fresh printing ink as it passes the doctor blade box. This results in imperfections in the printed image. This also applies accordingly to ink chamber doctor blades with gravure roller on gravure printing machines as well as to chamber doctor blades with anilox roller for evenly applying thin adhesive layers on carrier foils or web materials or for applying thin magnetic layers on magnetic tapes, for example for tape or video cassettes.
  • an ink chamber doctor blade of the type mentioned at the outset is known, which is designed as an ink application bar for a flushing inking unit of a rotary printing press.
  • a profile body can be freely flowed around between two doctor blades and can be pivoted or rotated. This is to achieve that by building up a uniform ink flow without turbulence, uniform ink contact with the inking roller at high peripheral speeds is possible and ink fluid pressure can be regulated to better fill the cells of the inking roller.
  • the profile body is elliptical in cross section.
  • a pivoting of the profile body about its axis of rotation thus results in a change in the smallest gap width, the gap being formed by the anilox roller and the lateral surface of the profile body facing the anilox roller.
  • a force of the color in the nip is greatest shortly before the smallest nip width, viewed in the direction of rotation of the anilox roller. According to a formula given there, a change in the smallest column width has an immediate change in force the ink on the anilox roller.
  • the profile body is pivoted by adjusting devices attached to the outside of the side plates of the paint application bar. The adjustment can be done by hand or by a servomotor.
  • the profile body can also have a wing profile in this known paint application strip or have two opposing concave outer surfaces, but always after the narrowing of the gap between the profile body and the outer surface of the anilox roller, the gap width gradually widened again and thus a corresponding gradual relaxation of the Cup of the anilox roller pressed ink is caused after passing through the anilox roller in the direction of rotation behind the profile body.
  • the printing ink is only slightly compressed by the narrowing of the gap width in the wells of the anilox roller and then not suddenly relaxed again, so that the ink parts present in the wells are not replaced by new ink. A special cleaning and color exchange effect is therefore not achieved simply by narrowing the gap width.
  • an ink chamber with a lower inlet and an upper outlet between two doctor blades is known with a narrowing in the direction of rotation the anilox roller towards the ink outlet, but even in this known ink application device the constriction is designed such that no sudden pressure drop occurs behind the constriction in the direction of rotation of the anilox roller.
  • the pressure fluid present in the wells of the anilox roller is therefore after the passage not further swirled by the narrowing of the ink chamber before the passage of the negative doctor blade arranged behind it in the direction of rotation of the anilox roller.
  • At least one additional doctor blade is provided within the ink chamber, wherein the additional doctor blade or blades can be placed on the application roller in the working position of the doctor blade chamber device without necessarily having to do so touch.
  • the additional doctor blade can also be a wiper blade doctor, which, however, lifts off the circumference of the application roller when pressure builds up on the doctor edge.
  • a device for coating material webs running over a back-up roll with adjustable application thickness with a metering chamber in which a return lip is arranged such that the pre-metering gap formed by the return lip to a pre-metering chamber generates a counter-rotating direction the barrier web directed material web allows. This is to prevent the entry of an air boundary layer with the circulating material web into the metering chamber at very high speeds.
  • the invention has the advantage that a high pressure is built up by the profile body, which is designed as a pressure lug, when the cylindrical body rotates in the wedge-shaped narrowing flow gap between the pressure lug and the body surface area, by means of which the liquid printing ink or the coating medium enters the wells on the circumference of the grid. or applicator roller is pressed in and is constantly swirled in it.
  • a sudden cross-sectional widening in the direction of rotation of the cylindrical body behind the pressure lug then creates a sudden pressure drop, which leads to the solvent-containing compressed in the wells and depressions on the cylindrical body by the pressure lug and also compressed air mixed with air bubbles suddenly relaxed and thereby at least partially rinsed out of the wells or depressions on the surface of the body and immediately replenished by the overlying pressurized fluid, so that ink residues and contaminants from the wells or depressions are constantly present in the area behind the pressurized nose removed and continuously removed with the pressure fluid from the upper part of the ink chamber.
  • the lower pressure generated in the rinse chamber by the recess and the sudden expansion of the cross section behind the pressure lug has the further advantage that a negative squeegee delimiting the ink chamber in the direction of rotation of the cylindrical body is not bulged outward, but rather with its knife-like squeegee edge always flawless and saturated
  • the circumference of the cylindrical body rests without an aquaplaning effect or increased wear occurring as in the prior art. This results in a better wiping of the roller circumference by the negative doctor.
  • the doctor blade has a significantly longer service life.
  • the invention thus has the advantage that the wells or depressions on the circumference of the cylindrical body are rinsed out by increased pressure in the wedge-shaped narrowing pressure zone between the pressure nose and body surface area and by the subsequent sudden drop in pressure with a cavitation effect, which results in a uniform color absorption by the Anilox roller / gravure roller and thus a constant color intensity.
  • the flow chamber extending in the flow direction of the printing ink in front of the printing lug is divided into an injection chamber and a pre-washing chamber by a leading edge parallel to the cylindrical body are connected to one another by a passage extending over the entire length of the flow chamber between the leading edge and the lower side wall of the doctor box.
  • the doctor blade box is composed of a bottom with lower and upper side walls between the end walls, and that horizontal and / or lower and upper inlets and outlets in the lower and upper side walls or vertical bores are provided, each of which leads a vertically or obliquely outgoing bore into the ink chamber.
  • an injection bore is directed vertically from the inlet against an injection channel, which extends at the bottom of the doctor box essentially over its entire length next to the leading edge, with particularly intimate mixing and uniform distribution of the printing ink in the injection channel can be achieved in that the injection channel has a cross section which widens in a V-shape towards the ink chamber and has a rounded bottom.
  • the feature of claim 7 is also of particular advantage for this, while the feature of claim 8 can achieve an even greater leveling of the supply of the printing ink to the screened or engraved cylindrical body.
  • the printing ink does not immediately reach the circumference of the cylindrical body, but must first pass through a very narrow longitudinal slot of about 1 to 2 mm in width under the partition in the lower part of the ink chamber with a uniform laminar flow in order to pass from the injection chamber into the prewash chamber to reach, from which, as already described above, the printing ink then passes through the wedge-shaped longitudinal slot past the pressure nose of the profile body with subsequent cavitation swirling into the upper ink chamber.
  • the upper ink chamber can also be divided by a vertical upper partition with a wider upper longitudinal slot into an upper rinse chamber and a return chamber, from which the pressure fluid is returned to the ink pump via the outlets.
  • the upper ink chamber is kept under a constant negative pressure by the discharge lines for the printing ink, so that no significant pressure can build up in the upper ink chamber. Nevertheless, due to the swirling of cavitation and the constant circulation of the pressure fluid in the upper ink chamber, adequate filling of the wells or depressions on the cylindrical body is ensured.
  • the invention thus has the advantage that the wells or depressions on the body surface area are rinsed out in depth by increased pressure in the wedge-shaped pressure zone and by the subsequent cavitation effect behind the pressure nose of the profile body, which results in a very uniform color delivery to the screened or engraved body surface area and results in a constant color intensity.
  • the laminar flow of the printing ink through the narrow lower longitudinal slot on the dividing wall to the prewash chamber also results in a uniform pre-rinsing of the cups on the roller circumference.
  • the ventilation slot of the profile body which is designed as a pressure lug and ventilation lug, is particularly suitable for liquid printing inks that are difficult to mix with air.
  • the printing ink rotates in the prewash chamber in mirror image to the direction of rotation of the printing roller.
  • the air is knocked out of the cups on the circumference of the pressure roller and then forcibly reaches the inlet of the ventilation slot, where the air bubbles are separated from the undulating printing ink and escape through the ventilation slot to the rinse chamber and further to the outlet of the ink chamber.
  • the removal of the air and gas bubbles from the printing ink has the advantage that the printing ink does not foam on the anilox roller.
  • Each well is on the perimeter of the anilox roller filled without air admixture, so that a better quality print image can be created.
  • the drying of the printing ink in the wells of the anilox roller is also counteracted, which likewise contributes to avoiding misprints.
  • the separation of the gas and air bubbles from the printing ink can be further improved in that at the transition from the swirling channel to the ventilation slot, a ventilation edge parallel to the inlet of the ventilation slot is formed, which absorbs the air and air absorbed in the prewash chamber by the rotating printing ink Separate gas bubbles from the impinging ink and redirect them into the ventilation slot.
  • the rising gas and air bubbles can then escape upwards through the ventilation slot, which advantageously opens into the rinsing chamber in a bulge area on the top of the profile body.
  • a bypass slot is provided between the bottom of the ink chamber and the back of the profile body for returning the printing ink from the rinse chamber to the prewash chamber.
  • the ink chamber doctor blade 1 shown in Fig. 1 for doctor blade printing units with anilox roller / gravure roller on flexographic printing machines / gravure printing machines consists of a doctor blade box 3 with an ink chamber 4 as well as a positive doctor blade 5 and a negative doctor blade 6, which with their doctor blade or knife edges on the circumference of an ink-transferring, screened circular cylindrical Bearing body 2, which rotates in the direction of the arrow 7.
  • the ink chamber 4 has a central lower inlet 8 and two upper outlets 9 for the forced circulation of the liquid printing ink by an ink pump, not shown.
  • the ink chamber doctor blades 1 shown there in cross section in the ink chamber 4 between the positive doctor blade 5 and the negative doctor blade 6 have a profile body 11 provided with a pressure nose 10, which extends over the entire length of the circular cylindrical body 2 extends and forms an increasingly narrowing wedge-shaped flow gap 12 in the direction of rotation 7 of the body 2, the pressure nose 10 being arranged at such a small distance from the lateral surface of the body 2 that a liquid pressure builds up in the flow gap 12 and the printing ink during circulation of the cylindrical body 2 past the pressure nose 10 into the upper part of the ink chamber 4 located behind the profile body 11, which serves as a rinsing chamber.
  • the profile body 11 is formed with a sharp-edged recess 14 for an abrupt widening of the cross-section to produce a sudden pressure drop in the pressure fluid emerging from the flow gap 12.
  • the distance between the pressure lug 10 and the circumference of the circular cylindrical body 2 can be adjusted in the embodiments of FIGS. 2, 3, 5, 6 and 9 by means of a mounting bracket 16 on the doctor blade box 3 which is adjustable perpendicular to the axis of rotation 15, while in the simplified embodiment of FIG. 4 the profile body 11 is fixedly mounted on the bottom 17 of the squeegee box 3, so that the distance of the pressure lug 10 from the circumference of the circular cylindrical body 2 is constant and cannot be changed.
  • the ink chamber 4 is formed on the rear wall of the squeegee box 3 above the lower inlet 8 for the printing ink with a horizontal injection channel 18, which by a leading edge parallel to the circular-cylindrical body 2, pointing obliquely downwards 19 is limited.
  • the leading edge 19 divides the flow chamber in the direction of flow of the printing ink upstream of the profile body 11 into an injection chamber 20 and a prewash chamber 21, which extends over the entire length of the flow chamber between the leading edge 19 and the lower side wall 22 of the squeegee box 3 extending passage 23 are interconnected.
  • This passage 23 can be dimensioned further or narrower by appropriate formation of the leading edge 19, as shown in FIGS. 2 and 3.
  • the doctor blade box 3 is composed of a base 17 with lower and upper side walls 22, 24 and end walls at the end.
  • Horizontal and / or vertical bores are provided as lower and upper inlets and outlets 8, 9 in the lower and upper side walls 22, 24, each of which leads to the ink chamber 4 with a vertically or obliquely outgoing bore.
  • an injection bore or an injection slot 25 is directed perpendicularly against the injection channel 18, which extends at the bottom 17 of the doctor blade box 3 essentially over its entire length next to the leading edge 19.
  • the injection channel 18 has a cross-section that widens in a V-shape toward the ink chamber 4 with a rounded bottom, and the injection bore or the injection slot 25 is arranged with the injection channel 18 that widens in a V-shape in cross-section so that it is inclined relative to the bottom 17 of the squeegee box 3. that the ink mixed in the injection channel 18 is passed under the leading edge 19 which laterally delimits the injection channel into the prewash chamber 21 and against the circumference of the anilox roller 2.
  • This configuration of the injection or distribution chamber 20 has the result that the ink after entry into the lower central inlet 8 and the deflection through the injection bore or the injection slot 25 and the injection channel 18 on both sides of the injection chamber 20 over the entire length of the doctor box 3 distributed and thereby mixed approximately helically in the injection channel 18 extending above the mouth of the injection bore 25, in order to then enter the prewash chamber 21 located in front of it between the front leading edge 19 and the lower side wall 22 of the doctor blade box 3, where it is further mixed, in order then to be drawn into the narrow flow gap 12 between the circumference of the roller and the longitudinal edge of the pressure nose 10 parallel to it from the circumferential circular cylindrical body 2, the printing ink in the wells becoming increasingly narrower in the flow gap 12 into the wells on the circumference of the catch due to the pressure build-up roll pressed in and mixed evenly.
  • the printing ink reaches the area of the recess 14, where a sudden, abrupt drop in pressure occurs, through which the printing ink is swirled in this way by a kind of cavitation effect that there is a washout effect in the wells or depressions of the circular cylindrical body 2, which leads to a renewed exchange of the printing ink in the wells, which then pass under the negative doctor blade 6 as the roller rotates further and frees it from unnecessary printing ink in the web areas become.
  • the cavitation effect behind the pressure lug 10 in the return chamber 26 results in a negative pressure or at least such a low pressure that an arching of the negative doctor blade 6 is avoided before the printing ink passes through the two upper outlets 9 is led away and is available again after passing through a filter for a new injection into the ink chamber 4.
  • a dividing wall 27 which is fastened to or integrally formed therewith protrudes downward from the profile body 11 over its entire length and leads to the lower side wall 22 of the doctor blade box 3 leaves a uniformly narrow longitudinal slot 28 for a laminar passage of the liquid printing ink from the injection or distribution chamber 20 into the prewash chamber 21.
  • an upper dividing wall 29 can also protrude upward from the profile body 11 over its entire length, which also forms one to the upper side wall 24 of the squeegee box 3 Leaves longitudinal slot 30 for a laminar passage of the doctored ink to form a rinse chamber 31 behind the return chamber 26.
  • the upper partition 29 can also have a backflow slot 32 for circulation and additional swirling of the ink scraped off the body 2 between the return chamber Release 26 and rinse chamber 31.
  • the profile body 11 can, however, be formed in one piece with both the lower partition wall 27 and with the upper partition wall 29, as shown in FIGS 27, 29 can have angular or rounded longitudinal edges corresponding to FIG. 5 or FIG. 6.
  • the sharp-edged recess 14 is rounded off approximately in a circular arc behind the pressure lug 10 and, following the rounding 33, merges into an approximately tangentially increasing wall section 34 offset parallel to the circumference of the circular-cylindrical body 2.
  • flow deflections 35, 36 for the printing ink are arranged in the form of raised longitudinal edges, which also contribute to reducing the liquid pressure against the inner edge of the doctor blade.
  • the profile body 11 has a ventilation slot 40 extending over its entire length between the prewash chamber 21 and the rinse chamber 31 and is provided on the inlet side of the ventilation slot 40 with a swirling channel 41 which is approximately circular in cross-section.
  • a ventilation edge 42 extends parallel to the inlet of the ventilation slot and separates the air and gas bubbles received in the prewash chamber 21 by the rotating printing ink from the impinging printing ink and deflects them into the ventilation slot 40.
  • the venting slot 40 opens into the rinse chamber 31 in a bulge region 43 on the upper side of the profile body 11.
  • bypass slot 44 for returning the printing ink from the rinse chamber 31 to the prewash chamber 21.
  • the width of this bypass slot can be changed, for example, by the mounting bracket 16 for the profile body 11 and fixed by spacer rings 45 on the bolts of the mounting bracket 16.
  • the profile body 11 also has a dividing wall 27 projecting into the prewash chamber 21, the lower longitudinal edge 46 of which runs at a small lateral distance parallel to the inside of the lower side wall 22 of the ink chamber 4 and which narrows and widens again in the flow direction of the printing ink in the manner of a Venturi nozzle Leaves passage (longitudinal slot 28) to the prewash chamber 21.
  • the flow conditions in the prewash chamber 21 can be further improved in that the lower partition 27 of the profile body 11 is inclined relative to the positive doctor blade 5 in such a way that the prewash chamber 21 has a cross section which gradually widens in the flow direction of the printing ink.
  • the doctor blades delimiting the ink chamber 4 in the circumferential direction of the circular cylindrical body 2 can be designed as a negative doctor blade instead of as a positive doctor blade 5 and also as a positive doctor blade instead of as a negative doctor blade 6 entirely according to the respective different coating requirements.
  • doctor blade printing units such chambered doctor blades can also be used advantageously for applying thin layers of adhesive to web materials as well as for applying magnetic layers to the tape materials of tape and video cassettes and for other comparable coating purposes.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Printing Methods (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Coating Apparatus (AREA)
  • Polymerisation Methods In General (AREA)
  • Developing Agents For Electrophotography (AREA)

Claims (26)

  1. Dispositif pour enduire des bandes de matériau circulantes, notamment racle à réservoir d'encre pour un corps en forme de cylindre circulaire tramé, qui sert au transfert de l'encre, comme par exemple un cylindre à trame ou un cylindre gravé, dans une machine d'impression comportant un réservoir d'encre pourvu de parois qui limitent l'espace du réservoir par rapport au corps, un dispositif pour amener l'encre et un dispositif pour évacuer l'encre utilisée, et un corps profilé retenu, qui s'étend axialement dans le réservoir d'encre entre l'arrivée et la sortie pour l'encre au niveau d'un boîtier de racle, caractérisé en ce que le corps profilé (11) est équipé d'un bec d'impression (10) qui est situé à distance de la surface enveloppe du corps et forme une fente axiale d'écoulement (12), et que le bec d'impression (10) possède, sur le côté d'évacuation de l'encre, dans le sens de rotation du corps (2), un épaulement (14) servant à réaliser un élargissement brusque de la section transversale pour l'obtention d'une chute brusque d'encre dans l'espace partiel de la chambre en arrière du bec d'impression (10).
  2. Dispositif selon la revendication 1, caractérisé en ce que la distance entre le bec d'impression (10) et la surface enveloppe du corps en forme de cylindre circulaire (2) est réglable au moyen d'un élément de retenue de montage (16) qui est situé sur le boîtier de racle (3) et est déplaçable perpendiculairement à l'axe de rotation (15) du corps.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'une chambre amont, qui s'étend en avant du bec d'impression (10) dans la direction de passage de l'encre d'impression, est subdivisé, par une arête de guidage (19), qui est parallèle au corps cylindrique (2), en une chambre d'injection (20) et en une chambre amont de balayage (21), qui sont reliées entre elles par un passage (23) qui s'étend sur toute la longueur de la chambre amont entre l'arête de guidage (19) et la paroi latérale inférieure (22) du boîtier de racle (3).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le boîtier de racle (3) est constitué par un fond (17) comportant des parois latérales inférieure et supérieure (22,24) entre des parois frontales terminales, et qu'il est prévu, en tant qu'entrées et ouvertures supérieures et inférieures (8,9), dans les parois latérales inférieure et supérieure (22,24), des perçages horizontaux et/ou verticaux, à partir desquels respectivement un perçage de départ vertical ou oblique pénètre dans le réservoir d'encre (4).
  5. Dispositif selon la revendication 4, caractérisé en ce qu'un perçage d'injection/une fente d'injection (25) s'étend verticalement, à partir de l'entrée (8) en direction d'un canal d'injection (18), qui s'étend au niveau de la base (17) du boîtier de racle (3) essentiellement sur toute la longueur de ce dernier à côté de l'arête de guidage (19).
  6. Dispositif selon les revendications 4 et 5, caractérisé en ce que le canal d'injection (18) possède une section transversale, qui s'élargit en forme de V en direction du réservoir d'encre (4) et possède un fond arrondi.
  7. Dispositif selon les revendications 5 et 6, caractérisé en ce que le perçage d'injection ou la fente d'injection (25) équipé du canal d'injection (18), qui s'élargit en forme de V en coupe transversale, est incliné par rapport au fond (17) du boîtier de racle (3) de telle sorte que l'encre d'impression est dirigée, au-dessous de l'arête de guidage (19), qui limite latéralement le canal d'injection (18), dans la chambre amont de balayage (21) et en direction de la périphérie du corps (2).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce qu'à partir du corps (11) et sur toute la longueur de ce dernier fait saillie vers le bas une paroi de séparation (27), qui est fixée au corps profilé et est réalisée d'un seul tenant avec ce dernier et qui, en direction de la paroi latérale inférieure (22) du boîtier de racle (3), libère une fente longitudinale uniformément étroite (28) permettant un passage laminaire uniforme de l'encre d'impression depuis la chambre d'injection ou de répartition (20), dans la chambre amont de balayage (21).
  9. Dispositif selon l'une des revendications 1 à 7 ou 8, caractérisé en ce qu'à partir du corps profilé (11) et sur toute la longueur de ce dernier fait saillie vers le haut une paroi supérieure de séparation (29), qui, en direction de la paroi latérale supérieure (24) du boîtier de racle (3), libère une fente longitudinale (30) pour un passage laminaire uniforme de l'encre d'impression, retirée par raclage à partir du corps cylindrique (2), en formant une chambre aval de balayage (31) et une chambre de retour (26).
  10. Dispositif selon la revendication 9, caractérisé en ce que la paroi supérieure de séparation (27) libère une fente (32) d'écoulement de retour pour une circulation de l'encre d'impression, retirée du corps (2) par raclage, entre la chambre de retour (26) et la chambre aval de balayage (31).
  11. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que les parois de séparation (27,29), qui font saillie vers le bas et vers le haut à partir du corps profilé (11), possèdent des bords longitudinaux anguleux.
  12. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que les parois de séparation (27,29), qui font saillie vers le bas et vers le haut à partir du corps profilé (11), possèdent des bords longitudinaux arrondis.
  13. Dispositif selon l'une des revendications 1 à 7 ou 8, caractérisé en ce que l'épaulement (14) situé en arrière du bec d'impression (10) est arrondi approximativement en forme d'arc de cercle et se prolonge, à la suite de l'arrondi (33), par un élément de paroi (34), qui est décalé parallèlement par rapport à la périphérie du corps (2) et remonte approximativement tangentiellement.
  14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce que des dispositifs (35,36) de déviation de l'écoulement pour l'encre d'impression sont disposés sur les parois du boîtier de racle (3), à côté d'une racle positive (5) et à côté d'une racle négative (6).
  15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce que le corps en forme de cylindre circulaire gravé (2) est un cylindre d'héliogravure.
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé en ce que des ouvertures de dérivation sont présentes entre la chambre amont de balayage (21) et la chambre aval de balayage (31) dans le corps profilé (11) à côté du bec d'impression (10).
  17. Dispositif selon l'une des revendications 1 à 16, caractérisé en ce que le corps profilé (11) possède une fente de désaération (40), qui s'étend sur toute sa longueur, entre la chambre amont de balayage (21) et la chambre aval de balayage (31).
  18. Dispositif selon l'une des revendications 1 à 17, caractérisé en ce que le corps profilé (11) possède, sur le côté entrée de la fente de désaération, une rainure de tourbillonnement (41) agencée approximativement en forme d'arc de cercle en coupe transversale.
  19. Dispositif selon l'une des revendications 1 à 18, caractérisé en ce qu'au niveau de la jonction entre la rainure de tourbillonnement (41) et la fente de désaération (40) est formée une arête de désaération (42), qui est parallèle à l'entrée de la fente de désaération et qui sépare de l'encre d'impression arrivante, les bulles d'air et de gaz qui sont absorbées par l'encre d'impression en rotation dans la chambre amont de balayage (21) et les dévie en direction de la fente de désaération (40).
  20. Dispositif selon l'une des revendications 1 à 19, caractérisé en ce que la fente de désaération (40) débouche dans une partie cintrée (43) située au niveau de la face supérieure du corps profilé (11), dans la chambre de balayage aval (31).
  21. Dispositif selon l'une des revendications 1 à 20, caractérisé en ce qu'entre le fond (17) du réservoir d'encre (4) et la face arrière du corps profilé (11) est disposée une fente de dérivation (44) pour un renvoi de l'encre d'impression de la chambre aval de balayage (31) à la chambre amont de balayage (21).
  22. Dispositif selon la revendication 21, caractérisé en ce que la largeur de la fente de dérivation (44) entre le fond (17) du réservoir d'encre (4) et la face arrière du corps profilé (11) est variable.
  23. Dispositif selon l'une des revendications 1 à 22, caractérisé en ce que le corps profilé (11) possède une paroi de séparation (27) qui pénètre dans la chambre amont de balayage (21) et possède un bord longitudinal inférieur (46), qui s'étend une faible distance latérale parallèlement à la face inférieure de la paroi latérale inférieure (22) du réservoir d'encre (4) et forme un passage constitué à la manière d'une buse à venturi dans la direction de passage de l'encre d'impression, en direction de la chambre amont de balayage (21).
  24. Dispositif selon l'une des revendications 1 à 23, caractérisé en ce que la paroi inférieure de séparation (27) du corps profilé (11) est biseautée, à la suite de la fente de dérivation (44), dans le sens d'écoulement de l'encre d'impression, en direction de la chambre de balayage (21) amont.
  25. Dispositif selon l'une des revendications 1 à 23, caractérisé en ce que le bord longitudinal (46) de la paroi de séparation (27) en vis-à-vis de la face intérieure de la paroi latérale inférieure (22) du réservoir d'encre (4) est arrondi.
  26. Dispositif selon l'une des revendications 1 à 25, caractérisé en ce que la paroi inférieure de séparation (27) du corps profilé (11) est inclinée par rapport à la racle positive (5) de telle sorte que la chambre amont de balayage (21) possède une section transversale qui s'élargit progressivement dans la direction de passage de l'encre d'impression.
EP92923767A 1991-11-26 1992-11-21 Racle du reservoir d'encre d'un element destine au transfert d'encre Expired - Lifetime EP0568674B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19914138807 DE4138807C1 (en) 1991-11-26 1991-11-26 Colour chamber doctor - is for colour-transfer, screened circular cylindrical body such as screen roller or engraved cylinder
DE4138807 1991-11-26
DE9205695U 1992-04-28
DE9205695 1992-04-28
PCT/EP1992/002684 WO1993010976A1 (fr) 1991-11-26 1992-11-21 Racle du reservoir d'encre d'un element destine au transfert d'encre

Publications (2)

Publication Number Publication Date
EP0568674A1 EP0568674A1 (fr) 1993-11-10
EP0568674B1 true EP0568674B1 (fr) 1996-08-07

Family

ID=25909495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92923767A Expired - Lifetime EP0568674B1 (fr) 1991-11-26 1992-11-21 Racle du reservoir d'encre d'un element destine au transfert d'encre

Country Status (7)

Country Link
US (1) US5497702A (fr)
EP (1) EP0568674B1 (fr)
AT (1) ATE141082T1 (fr)
AU (1) AU2944492A (fr)
DE (2) DE9215854U1 (fr)
DK (1) DK0568674T3 (fr)
WO (1) WO1993010976A1 (fr)

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EP1110728A1 (fr) 1999-12-22 2001-06-27 MAN Roland Druckmaschinen AG Système de dosage pour un liquide dans une unité de revêtement
DE102006024789A1 (de) * 2006-05-27 2007-11-29 Man Roland Druckmaschinen Ag Druckmaschine

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NL9400988A (nl) * 1994-06-16 1996-02-01 Namic Bv Rakelkamer met afdichtingselement.
DE4447123C1 (de) * 1994-12-29 1996-04-11 Koenig & Bauer Albert Ag Kammerrakel für eine Rotationsdruckmaschine
DE19536268C1 (de) * 1995-09-28 1997-02-06 Windmoeller & Hoelscher Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
DE19600651A1 (de) * 1996-01-10 1997-07-17 Polywest Kunststofftechnik Farbkammerrakel für einen farbübertragenden Körper
JPH1133506A (ja) * 1997-07-24 1999-02-09 Tadahiro Omi 流体処理装置及び洗浄処理システム
US5791248A (en) * 1997-03-27 1998-08-11 Paper Converting Machine Company Liquid supply unit for roll applicator and method
NL1006861C2 (nl) * 1997-08-27 1999-03-02 Cornelis Gorter Kamerrakelsysteem.
US6210757B1 (en) 1998-03-23 2001-04-03 Black Clawson Company, Inc. Pressurized enclosed gravure applicator and method
US7559990B2 (en) * 1998-05-19 2009-07-14 Eugene A Pankake Coating apparatus and method
GB9817194D0 (en) * 1998-08-07 1998-10-07 Hayneswood Engineering Sales L Coating apparatus
FR2793441B1 (fr) * 1999-05-11 2001-08-03 Saint Eloi Mecanique Outil Sa Dispositif pour l'encrage d'un anilox d'une machine a impression flexographique
US20090295098A1 (en) * 1999-05-18 2009-12-03 Pankake Eugene A Coating apparatus and method
DE10164773A1 (de) * 2001-09-03 2003-07-17 Kroenert Max Maschf Druckkammerrakel
US20050247673A1 (en) * 2004-05-07 2005-11-10 International Business Machines Corporation Confinement of fluids on surfaces
DE102005041187A1 (de) * 2005-08-31 2007-03-01 Koenig & Bauer Ag Vorrichtung und Verfahren zum Entfärben einer Walze an einer Rotationsdruckmaschine
DE102005041185B4 (de) * 2005-08-31 2014-03-27 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Einfärben einer Walze an einer Rotationsdruckmaschine
CN101400518A (zh) * 2006-03-09 2009-04-01 图像印刷与科技公司 用于高粘度墨的刮刀腔
DE102006029883A1 (de) * 2006-06-28 2008-01-03 Koenig & Bauer Aktiengesellschaft Vorrichtung zum Einfärben einer Walze an einer Rotationsdruckmaschine
DE102008012552A1 (de) * 2008-03-04 2009-09-17 Windmöller & Hölscher Kg Farbkammerrakel an einer Druckmaschine
JP5529497B2 (ja) * 2009-11-05 2014-06-25 三菱重工印刷紙工機械株式会社 フレキソ印刷機のインキ洗浄方法及び装置
JP5815984B2 (ja) * 2011-05-19 2015-11-17 富士機械工業株式会社 塗工装置
CN104204962B (zh) 2012-04-07 2019-07-30 惠普发展公司，有限责任合伙企业 液体电子照相的墨显影器
US9289793B1 (en) * 2012-06-19 2016-03-22 Michael R. Bonner Profile correction module
BR112015022200A2 (pt) 2013-03-13 2017-07-18 Probity Eng Llc aparelho de fonte de tinta, sistema de prensa de impressão flexográfica e método para ajustar características de impressão em impressão flexográfica
JP5695698B2 (ja) * 2013-05-24 2015-04-08 富士機械工業株式会社 グラビアキス塗工装置
JP6068261B2 (ja) * 2013-05-24 2017-01-25 富士機械工業株式会社 印刷塗工装置
DE102013010751A1 (de) 2013-06-27 2014-12-31 Heidelberger Druckmaschinen Ag Dichtung für Rakeleinrichtungen
JP6387830B2 (ja) * 2014-03-28 2018-09-12 東レ株式会社 塗布装置、塗布方法および塗膜つき樹脂フィルムの製造方法
CN104325788B (zh) * 2014-10-24 2017-01-18 上海紫泉标签有限公司 防漏墨腔结构
JP5989843B2 (ja) * 2015-03-30 2016-09-07 富士機械工業株式会社 塗工装置
JP6341957B2 (ja) * 2016-08-10 2018-06-13 富士機械工業株式会社 塗工装置
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DE202023100032U1 (de) * 2023-01-05 2023-02-13 Olbrich Gmbh Vorrichtung zur Beschichtung eines bahnförmigen Trägermaterials mit einem keramischen Slurry

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Publication number Priority date Publication date Assignee Title
EP1110728A1 (fr) 1999-12-22 2001-06-27 MAN Roland Druckmaschinen AG Système de dosage pour un liquide dans une unité de revêtement
DE102006024789A1 (de) * 2006-05-27 2007-11-29 Man Roland Druckmaschinen Ag Druckmaschine

Also Published As

Publication number Publication date
AU2944492A (en) 1993-06-28
ATE141082T1 (de) 1996-08-15
EP0568674A1 (fr) 1993-11-10
DK0568674T3 (da) 1996-12-23
DE59206870D1 (de) 1996-09-12
DE9215854U1 (de) 1993-03-25
WO1993010976A1 (fr) 1993-06-10
US5497702A (en) 1996-03-12

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