EP0422344B1 - Dispositif de raclage - Google Patents

Dispositif de raclage Download PDF

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Publication number
EP0422344B1
EP0422344B1 EP90114725A EP90114725A EP0422344B1 EP 0422344 B1 EP0422344 B1 EP 0422344B1 EP 90114725 A EP90114725 A EP 90114725A EP 90114725 A EP90114725 A EP 90114725A EP 0422344 B1 EP0422344 B1 EP 0422344B1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
roller
doctor
carriage
holder
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
EP90114725A
Other languages
German (de)
English (en)
Other versions
EP0422344A2 (fr
EP0422344A3 (en
Inventor
Herbert Lübke
Volker Schröder
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher 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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0422344A2 publication Critical patent/EP0422344A2/fr
Publication of EP0422344A3 publication Critical patent/EP0422344A3/de
Application granted granted Critical
Publication of EP0422344B1 publication Critical patent/EP0422344B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/08—Wiping mechanisms
    • B41F9/10—Doctors, scrapers, or like devices
    • B41F9/1036—Clamping and adjusting devices
    • B41F9/1045—Clamping and adjusting devices using fluid pressure

Definitions

  • the invention relates to a doctor blade device, the doctor blade of which is fastened in a doctor blade holder and can be adjusted to an ink-absorbing roller, preferably to the forme cylinder of a gravure printing machine.
  • doctor devices of this type there is the problem of being able to position the doctor knife along its length with even pressure against the roller even if the surface line of the roller on which or the area of which the doctor knife is supported is not exactly parallel to the cutting edge of the doctor knife. which is the case, for example, if the axis of the roller does not run parallel to the blade of the doctor blade or if the roller has a conical shape.
  • a part rotatable about the central axis which is rotatable about the pivot axis of the squeegee carrier, carries a pendulum axle journal bearing pair, the rotatable part of which carries the doctor blade holder and its central axis also in the middle of the doctor blade holder at a right angle to the central axis of the rotatable part.
  • a squeegee device known from DE-AS 12 28 276, the squeegee holders are carried by a rotatable squeegee carrier shaft equipped with rotating arms, which is mounted in independently rotatable swivel arms, both on the swivel arms and on the swivel arms in the direction of the forme cylinder effective, elastic force can be exercised.
  • This known squeegee device only works satisfactorily if the squeegee carrier shaft carrying the lever-like squeegee holder is not too long, because otherwise it can bend in its central region by an unacceptable amount, which then results in incomplete doctoring in the central region of the forme cylinder Has.
  • the object of the invention is therefore to provide a doctor device of the type mentioned, in which the doctor blade can be pressed against the roller with essentially the same pressure, regardless of the length of the doctor holder.
  • this object is achieved in a doctor blade device of the generic type in that the doctor blade holder or the like is provided by a plurality of pins or the like arranged at right angles to its longitudinal extent. rotatable with sled-like support pieces that run at right angles to the roller Guides are slidably guided, connected and pressed against the roller by a plurality of resilient pressing means distributed over its length, for example pressure medium piston-cylinder units.
  • the sled-like support pieces allow the doctor blade holder to be set against the roller with essentially the same pressure, the pins bearing the doctor blade holder relative to the support pieces allowing the doctor blade holder to be rotated accordingly to the support pieces.
  • the pressure means can be arranged in the desired manner over the length of the squeegee holder and act directly on this or also on the slide-like support pieces. Since any number of pressing means can be provided over the length of the doctor blade holder, even good doctor blades and associated doctor blade holders ensure a uniform, good and vibration-proof pressure, whereby the pin bearings ensure a tension-free inclination of the doctor blade holder in accordance with any oblique surface lines of the roller.
  • a pressing means is expediently assigned to each slide-like support piece.
  • the support pieces can be guided in guides of carriages which are provided with a drive which reciprocates the carriage parallel to the roller. This reversing drive prevents the doctor blade from constantly being in contact with the same peripheral areas of the roller.
  • the pressing means can consist of pneumatic piston-cylinder units, which are supported on the one hand on the doctor blade holder and on the other hand via holding pieces on the slide.
  • Two side walls of the frame are connected to one another by means of a crossbar 2.
  • Gear units 3 and 4 are screwed to the inner sides of each side wall 1, a motor 5 being assigned to the gear unit 4.
  • the gears 3 and 4 are connected to one another via a shaft 6.
  • the threaded spindles 7 and 8 which can be driven by the motor 5 via the gears 3 and 4 are held in the region of their ends remote from the gears 3 and 4 via brackets 9 and 10 connected to the side walls 1.
  • Bearings 11 and 12 equipped with threaded nuts, not shown, are placed on the threaded spindles 7 and 8.
  • a bearing journal 13 is rotatably held, which is firmly connected to one side of a cast frame 14.
  • a bearing journal 15 is also rotatably mounted in the bearing shown on the right side of FIG.
  • a clamping lever 16 is placed on the bearing pin 15 shown on the right in FIG. 1 and is fork-shaped on its side facing the viewer in FIG. 3.
  • a bolt 19 is rotatably mounted, which has a central threaded bore 20.
  • a threaded spindle 21 is screwed into this threaded bore and has a joint 22 at its lower end (FIG. 1). About this joint 22, the threaded spindle 21 is connected to a stub shaft 23 which is axially fixed but rotatable in a support profile 24.
  • the latter, namely the pulley 27, can be driven by a motor 28 which is firmly connected to the support profile 24.
  • the support profile 24 itself is attached to the bearing 12.
  • the two bearings 11 and 12 can consequently be raised and lowered, as a result of which the cast frame 14 can also be raised or lowered via the bearing pins 13 and 15.
  • the cast frame 14 can additionally be pivoted via the threaded spindle 21, the bolt 19 and the clamping lever 16.
  • the cast frame 14 has a plurality of supports 29 which are arranged at a distance from one another, two supports 29 each carrying an axis 30. Arms 31, which are firmly connected to the actual doctor holder 32, are supported on the three axes 30.
  • a further motor 33 is flanged to the casting frame 14, by means of which the squeegee holder 32 is opposite the Base frame 14 can be pivoted. This pivoting takes place in an analogous manner to the pivoting of the cast frame 14 via the motor 28, so that a further explanation is unnecessary.
  • a forme cylinder 34 and an impression roller 35 are shown in full lines in FIG.
  • the doctor blade 36 is attached to the forme cylinder 34 and is connected to the doctor holder 32 via clamping pieces 37 and a clamping claw 38.
  • the doctor blade can pass through the angle B, which has an influence on the degree of drying of the ink. (The farther the doctor blade is from the impression roller, the farther the path that the scraped cups of the forme cylinder have to travel to the impression roller, which results in a high degree of drying).
  • the doctor blade can be adjusted within the angle A by a corresponding method of the three motors mentioned, by which the degree of cell filling is defined. (The smaller the angle A, the greater the degree of filling of the cells).
  • FIGS. 4 to 6 differ from FIGS. 1 to 3 in that the arms 105 corresponding to the arms 31 additionally carry slides 107, 113 which are displaceable at right angles to one another, with the slide 113 on the Doctor blade holder 117 is supported by pins and is pressed onto the forme cylinder 120 by its own pressing means.
  • the cast frame 101 is mounted in the machine side frames in the manner described with reference to FIGS. 1 to 3, and is pivotably mounted.
  • This cast frame 101 has a plurality of supports 102, an axis 103 being pivotably mounted in two adjacent supports. The pivoting of this axis takes place via an adjustment device 104.
  • An arm 105 is clamped onto each axis 103, which has a guide profile 106 running in the direction of the axis 103.
  • a slide 107 is placed on each arm 105, which on its underside also has a guide profile 108 which runs in the longitudinal direction of the axis 103 and which engages in the guide profile 106.
  • a rodless cylinder unit 110 is connected to the arms 105 by means of a holder 109, the reciprocable pin 111 of which is connected to the carriage 107, whereby the latter can be reversed in the double arrow direction A. This reversing movement, which is only a few millimeters, is transferred to the doctor blade 112.
  • a further slide 113 is placed on the slide 107.
  • the carriage 107 has on its upper side two grooves 114 which run transversely to the axis 103 and into which guide strips 115 connected to the carriage 113 engage.
  • Each carriage 113 carries a guide pin 116, each of which protrudes into a bore in the doctor blade holder 117 with its end facing away from the carriage.
  • Each pivot 116 is rotatable with respect to the carriage 113 and the doctor holder 117.
  • the doctor blade 112 is clamped to the doctor holder 117 via a clamping piece 118 and the toggle screw 119.
  • the doctor blade 112 is pressed against the forme cylinder 120 via a pneumatic piston-cylinder unit 121, the cylinder 122 of which is firmly connected to the carriage 107 via an angle 123.
  • the doctor blade knife can evenly rest against the forme cylinder 120 even when it is in an inclined position.
  • the squeegee holder 117 is supported uniformly over its entire length, so that there is no fear of deflections. Even if only three bearing points for the squeegee holder 17 are shown in the exemplary embodiment shown, several can of course be provided if necessary without leaving the scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (4)

  1. Dispositif de râclage dont le couteau de râclage fixé dans un support de râcle peut être appliqué à un cylindre recevant l'encre, de préférence au cylindre porte-clichés d'une machine rotative hélio,
       caractérisé en ce que le support de râcle (117) est relié par plusieurs tourillons (116) ou analogues disposés à angle droit à son étendue longitudinale de façon rotative à un même nombre de pièces de support (113) en forme de chariot qui sont guidés de façon déplaçable dans des guidages (114,115) s'étendant à angle droit au cylindre (120), et qu'il est appliqué par plusieurs moyens d'application élastiques répartis sur sa longueur, par exemple des unités à piston et à cylindre à fluide sous pression (121) au cylindre (120).
  2. Dispositif de râclage selon la revendication 1, caractérisé en ce qu'il est associé à chaque pièce de support en forme de chariot (113) un moyen d'application (121).
  3. Dispositif de râclage selon la revendication 1 ou 2, caractérisé en ce que les pièces de support (113) sont guidées dans des guidages (114,115) de chariots (107) qui sont pourvus d'une commande (110) communiquant un mouvement de va-et-vient aux chariots (107) parallèlement au cylindre (120).
  4. Dispositif de râclage selon l'une des revendications 1 à 3, caractérisé en ce que les moyens d'application sont constitués d'unités à piston et à cylindres pneumatiques (121) qui prennent appui d'une part sur le support de râcle (117) et d'autre part, par des pièces de retenue (123), sur le chariot (107).
EP90114725A 1989-10-10 1990-07-31 Dispositif de raclage Expired - Lifetime EP0422344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933844 1989-10-10
DE3933844A DE3933844A1 (de) 1989-10-10 1989-10-10 Rakelvorrichtung

Publications (3)

Publication Number Publication Date
EP0422344A2 EP0422344A2 (fr) 1991-04-17
EP0422344A3 EP0422344A3 (en) 1991-06-05
EP0422344B1 true EP0422344B1 (fr) 1993-10-20

Family

ID=6391214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114725A Expired - Lifetime EP0422344B1 (fr) 1989-10-10 1990-07-31 Dispositif de raclage

Country Status (4)

Country Link
US (1) US5136941A (fr)
EP (1) EP0422344B1 (fr)
CA (1) CA2026858A1 (fr)
DE (2) DE3933844A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130118C2 (de) * 1991-09-11 1995-04-20 Jagenberg Ag Vorrichtung zum Beschichten einer um eine Gegenwalze geführten Materialbahn, insbesondere einer Papier- oder Kartonbahn
DE4340867C2 (de) * 1993-12-01 1996-08-14 Roland Man Druckmasch Vorrichtung zum An- und Abstellen einer Rakeleinrichtung an eine Auftragwalze in Rotationsdruckmaschinen
US5584243A (en) * 1996-01-05 1996-12-17 Austrian Machine Corporation Conversion kit for a gravure printing unit
JP4711495B2 (ja) 2000-08-08 2011-06-29 スリーエム イノベイティブ プロパティズ カンパニー 塗布装置
JP5130577B2 (ja) 2007-04-27 2013-01-30 ボブスト ソシエテ アノニム グラビア印刷機用の印刷装置のドクターブレードシステム

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2057689B1 (de) * 1970-11-24 1971-12-16 Maschf Augsburg Nuernberg Ag Einrichtung an Rotationsdruckmaschinen zur Steuerung des Anpressdruckes einer Rakel
US3783781A (en) * 1971-09-20 1974-01-08 S Grommek Doctor blade control mechanism, particularly for use in printing presses
DE3020306C2 (de) * 1980-05-29 1982-11-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbmesser für eine Farbkastenwalze von Druckmaschinen
SE442969B (sv) * 1981-12-14 1986-02-10 Wifag Maschf Doseringskniv
US4638733A (en) * 1984-01-20 1987-01-27 Horst Rebhan Squeegee head for printing of bodies by the screen printing method
US4773327A (en) * 1987-04-09 1988-09-27 Am International Ink metering blade

Also Published As

Publication number Publication date
CA2026858A1 (fr) 1991-04-11
US5136941A (en) 1992-08-11
DE59003148D1 (de) 1993-11-25
DE3933844A1 (de) 1991-04-18
EP0422344A2 (fr) 1991-04-17
EP0422344A3 (en) 1991-06-05

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