EP1023178A1 - Screen printing installation - Google Patents

Screen printing installation

Info

Publication number
EP1023178A1
EP1023178A1 EP98938578A EP98938578A EP1023178A1 EP 1023178 A1 EP1023178 A1 EP 1023178A1 EP 98938578 A EP98938578 A EP 98938578A EP 98938578 A EP98938578 A EP 98938578A EP 1023178 A1 EP1023178 A1 EP 1023178A1
Authority
EP
European Patent Office
Prior art keywords
printing unit
screen printing
unit according
squeegee
doctor blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98938578A
Other languages
German (de)
French (fr)
Other versions
EP1023178B1 (en
Inventor
Heinz Brocker
Hansrudolf Frick
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.)
Gallus Ferd Rueesch AG
Original Assignee
Gallus Ferd Rueesch AG
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 Gallus Ferd Rueesch AG filed Critical Gallus Ferd Rueesch AG
Publication of EP1023178A1 publication Critical patent/EP1023178A1/en
Application granted granted Critical
Publication of EP1023178B1 publication Critical patent/EP1023178B1/en
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
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/40—Inking units
    • B41F15/42—Inking units comprising squeegees or doctors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0809—Machines for printing sheets with cylindrical or belt-like screens

Definitions

  • the present invention relates to a screen printing unit with a circular screen with a doctor blade arranged therein, a counterpressure surface for the rotary screen, drive means and a device for controlled lifting of the doctor blade during the printing process.
  • Screen printing units of this type are known, and their circular screens are provided for discontinuous web running or for sheet printing.
  • the distance from the end of the print to the start of the next print should be as small as possible (due to expensive substrates). Accordingly, the distance from the leading edge of the paper to the start of printing should be as small as possible.
  • the (adjustable) squeegee pressure is generated mechanically, which in comparison e.g. of pneumatic
  • Controls allow a significant increase in speeds.
  • the cam is preferably adjustable on the circumference at the start of the print in the barrel in order to achieve the smallest possible distance from the end of the print to the start of the print. Thanks to this adjustability, the influences of the color and the color decrease can be compensated.
  • the adjustability or adjustability can be solved with a central drive via a helical toothing or via separate drives of the rotary screen and doctor unit (adjustment within the synchronization).
  • the circular sieve can have a closed zone in the zero position so that no color can run out.
  • a color level control is preferably used so that as little color as possible is required in the screen.
  • FIG. 1 purely schematically, a screen printing unit integrated on a sheet-fed printing machine
  • FIG. 2 a representation similar to FIG. 1 with a rotary screen printing unit on a web printing machine with vocational web transport;
  • Fig. 5 also purely schematically, a rotary screen printing unit with discontinuous doctor blade printing (in the absence of back pressure).
  • FIG. 1 to 3 of the drawing illustrate the principle of various rotary screen printing processes.
  • Fig. 1 shows a rotary screen printing unit integrated on a sheet printing machine.
  • the circular sieve 1 can be provided with or without indentation 1 '.
  • the doctor blade 2 arranged in the interior of the screen is coupled to a device for controlled lifting of the doctor blade 2 (not shown here).
  • the circular screen 1 is provided with an indentation l 1 (for example in the form of a crossbar with a release for the above gripper 4 on the counter-pressure cylinder) 3).
  • the gripper 4 is sunk (not shown), no indentation is required in the circular sieve.
  • the squeegee 2 must Bay l 1 or the pit zone can be raised with the gripper 4 recessed.
  • Fig. 2 shows schematically a rotary screen printing unit, which is integrated on a web printing machine with vocational web transport.
  • a doctor blade 2 with a coupled device (not shown) for controlled lifting of the doctor blade
  • an impression cylinder 3 with a release zone 3 '.
  • the squeegee 2 has to be lifted above the release zone 3 'of the impression cylinder 3 because of the web retraction (pilgrimage step).
  • Fig. 3 shows the principle of a rotary screen printing unit, which is integrated on a body printing machine.
  • the rotary screen 1 is provided with a squeegee 2 which can be raised in a controlled manner.
  • the bodies to be printed can be flat bodies 3 (e.g. glass plates) on a conveyor belt 4 or cylindrical bodies 5 (e.g. bottles).
  • the bodies 3 and 5 to be printed form the counter pressure surface.
  • the squeegee 2 must be raised between the individual bodies.
  • Fig. 4 shows the synchronized drive of the circular screen 1, the doctor blade 2 and the impression cylinder 3 (here impression cylinder with the release zone of a mit stepping machine) of a screen printing unit.
  • the synchronized drive is on one side of the printing unit. On the other side of the rotary screen 1, however, a further cam disc with a lever for controlling the doctor blade 2 could be provided.
  • the synchronized drive of rotary screen 1, doctor blade 2 and impression cylinder 3 is essentially carried out via the following elements:
  • the gear wheels 4, 5, driven by the motor 7, serve to drive the rotary screen 1 and impression cylinder 3.
  • the motor 7 is used here to drive the printing unit.
  • the drive could also be carried out from a machine main shaft.
  • a gear 11 is driven with helical teeth, which forms part of the control device for the doctor blade 2.
  • the cam disk 14 is driven via a further gear wheel 12 with helical teeth, which is mounted so as to be transversely displaceable via an adjusting mechanism 13. With the adjusting mechanism 13, the phase of the cam disk 14 can be adjusted (even during the run), thanks to the helical teeth with high precision.
  • the cam disk 14 can have a fixed or a variable contour (e.g. thanks to the construction by two adjacent disks that can be rotated against each other).
  • a roller 15 and the squeegee lever 16 Via a roller 15 and the squeegee lever 16 (e.g. a kind
  • FIG. 5 shows a representation similar to FIG. 4, namely a rotary screen printing unit with discontinuous doctor blade printing.
  • rotary screen 1, doctor blade 2 or control cam disks 14 and impression cylinder 3 are driven by three independent motors 17, 18, 19, which allows maximum flexibility in the settings during synchronization.
  • the cam disks 14 can have a fixed or variable contour (see explanations for FIG. 4) and the doctor blade pressure can be set in the bearing point 16 'of the doctor blade lever.
  • the doctor blade pressure can be adjusted during the run (printing process, see paper web 20).
  • the squeegee 2 must always be lifted when there is no back pressure, otherwise the circular screen 1 can be damaged.
  • the independent drives e.g. turn the circular sieve into a position in which no color can run out, but in particular into the correct position in any position of the sieve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The invention relates to a screen printing installation having a round screen (1) with a squeegee (2) and a counterpressure surface (3) fitted inside. Said installation has a device which is synchronized with the screen drive (1) and the counterpressure surface (3). This device controls the lifting off of the squeegee (2), and has at least one cam (14) which moves the squeegee (2) into the desired position by means of a squeegee lever (16).

Description

S i ebdruc kwe r kS i ebdruc kwe r k
Die vorliegende Erfindung betrifft ein Siebdruckwerk mit einem Rundsieb mit darin angeordneter Rakel, einer Gegendruckfläche für das Rundsieb, Antriebsmitteln und einer Einrichtung zum ge- steuerten Abheben der Rakel während dem Druckvorgang.The present invention relates to a screen printing unit with a circular screen with a doctor blade arranged therein, a counterpressure surface for the rotary screen, drive means and a device for controlled lifting of the doctor blade during the printing process.
Siebdruckwerke dieser Art sind bekannt, und deren Rundsiebe sind für den diskontinuierlichen Bahnlauf oder für den Bogendruck vorgesehen.Screen printing units of this type are known, and their circular screens are provided for discontinuous web running or for sheet printing.
Bei diesen Druckverfahren soll beim diskontinuierlichen Bahn- lauf der Abstand von Druckende zu Druckanfang des nächsten Druckes möglichst klein sein (wegen teueren Bedruckstoffen) . Entsprechend soll beim Bogendruck der Abstand von der Papiervorderkante zum Druckanfang möglichst klein sein.With these printing processes, the distance from the end of the print to the start of the next print should be as small as possible (due to expensive substrates). Accordingly, the distance from the leading edge of the paper to the start of printing should be as small as possible.
Zur möglichst optimalen Lösung solcher Aufgaben bei immer höhe- ren Druckgeschwindigkeiten wird es immer schwieriger, die Rakel bei sehr kurzen Zykluszeiten (10 msec) zu bewegen. Das System bedarf im Zusammenspiel mit unterschiedlichen Farben und Motiven (d.h. unterschiedlichem Farbbedarf) einer ausserordentliehen Dynamik, welche nicht einfach beherrschbar ist. Hinzu kommt noch, dass beim Rundsieb die Farbe im Stillstand durch das Sieb läuft (offene Stellen; das Motiv befindet sich am ganzen Umfang) .In order to optimally solve such tasks at ever higher printing speeds, it is becoming increasingly difficult to move the doctor blade with very short cycle times (10 msec). In combination with different colors and motifs (i.e. different color requirements), the system requires an extraordinary dynamic that is not easy to master. Added to this is the fact that the color of the circular sieve runs through the sieve at a standstill (open spaces; the motif is on the entire circumference).
Die komplexe Aufgabe konnte nun bei einem Siebdruckwerk der eingangs definierten Art erfindungsgemäss durch eine Konstruk- tion gemass dem kennzeichnenden Teil von Anspruch 1 gelöst werden.The complex task could now be solved according to the invention in a screen printing unit of the type defined at the outset by a construction in accordance with the characterizing part of claim 1.
Auch höchste Taktzahlen mit kurzen Bewegungszeiten können dank der erfindungsgemässen Lösung, d.h. über separate Kurvenschei- ben realisiert werden. Dank dieser mechanischen Steuerung können Massenkräfte der Rakel durch geeignete Konstruktionen stark reduziert werden.Even the highest number of cycles with short movement times can be achieved thanks to the solution according to the invention, ie via separate cam plates. ben can be realized. Thanks to this mechanical control, the inertial forces of the squeegee can be greatly reduced by suitable designs.
Dank der Kurvenscheibe wird der (einstellbare) Rakeldruck me- chanisch erzeugt, was im Vergleich z.B. von pneumatischenThanks to the cam disc, the (adjustable) squeegee pressure is generated mechanically, which in comparison e.g. of pneumatic
Steuerungen eine wesentliche Erhöhung der Geschwindigkeiten erlaubt .Controls allow a significant increase in speeds.
Die Kurvenscheibe ist am Umfang zum Druckanfang im Lauf vorzugsweise verstellbar, um einen möglichst geringen Abstand von Druckende zu Druckanfang zu erreichen. Dank dieser Verstellbarkeit können die Einflüsse der Farbe und der Farbabnahme ausgeglichen werden. Die Verstellbarkeit bzw. Einstellbarkeit kann bei zentralem Antrieb über eine Schrägverzahnung gelöst werden oder über separate Antriebe von Rundsieb und Rakelwerk (Verstellung innerhalb der Synchronisation) .The cam is preferably adjustable on the circumference at the start of the print in the barrel in order to achieve the smallest possible distance from the end of the print to the start of the print. Thanks to this adjustability, the influences of the color and the color decrease can be compensated. The adjustability or adjustability can be solved with a central drive via a helical toothing or via separate drives of the rotary screen and doctor unit (adjustment within the synchronization).
Das Rundsieb kann in der Nullstellung eine geschlossene Zone aufweisen, so dass keine Farbe auslaufen kann. Vorzugsweise wird eine Farbniveauregelung verwendet, so dass möglichst wenig Farbe im Sieb notwendig ist .The circular sieve can have a closed zone in the zero position so that no color can run out. A color level control is preferably used so that as little color as possible is required in the screen.
Besonders vorteilhafte Ausführungsformen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen definiert.Particularly advantageous embodiments of the subject matter of the invention are defined in the dependent claims.
Das erfindungsgemässe Siebdruckwerk wird nachstehend anhand der Zeichnung noch etwas näher erläuter . Es zeigt :The screen printing unit according to the invention is explained in more detail below with reference to the drawing. It shows :
Fig. 1: rein schematisch ein Siebdruckwerk integriert auf ei- ner Bogendruckmaschine; Fig. 2: eine ähnliche Darstellung wie Fig. 1 mit einem Rotationssiebdruckwerk auf einer Rollendruckmaschine mit Pilgerschritt-Bahntransport ;1: purely schematically, a screen printing unit integrated on a sheet-fed printing machine; FIG. 2: a representation similar to FIG. 1 with a rotary screen printing unit on a web printing machine with pilgrim web transport;
Fig. 3: schematisch ein Rotationssiebdruckwerk integriert auf Körperdruckmaschine mit ebenen oder zylindrischen Körpern;3: schematically, a rotary screen printing unit integrated on a body printing machine with flat or cylindrical bodies;
Fig. 4: eine rein schematische Darstellung eines synchronisierten Antriebs eines Rundsiebes mit gesteuerter Rakel und dem Gegendruckzylinder als mechanische Ausfüh- rung (eine Maschinenseite) und4: a purely schematic representation of a synchronized drive of a rotary screen with a controlled doctor blade and the impression cylinder as a mechanical design (one machine side) and
Fig. 5: ebenfalls rein schematisch ein Rotationssiebdruckwerk mit diskontinuierlichem Rakeldruck (bei fehlendem Gegendruck) .Fig. 5: also purely schematically, a rotary screen printing unit with discontinuous doctor blade printing (in the absence of back pressure).
Die Figuren 1 bis 3 der Zeichnung illustrieren das Prinzip ver- schiedener Rotationssiebdruckverfahren.Figures 1 to 3 of the drawing illustrate the principle of various rotary screen printing processes.
Fig. 1 zeigt ein Rotationssiebdruckwerk integriert auf einer Bogendruckmaschine. Das Rundsieb 1 kann mit oder ohne Einbuchtung 1' versehen sein. Die im Innern des Siebes angeordnete Rakel 2 wird mit einer Einrichtung zum gesteuerten Abheben der Rakel 2 gekoppelt (hier nicht dargestellt) . Auf dem Gegendruckzylinder 3 liegt ein von einem Greifer 4 erfassbarer Bogen 5. Bei vorstehendem Greifer 4 in der Grubenzone des Gegendruckzylinders ist das Rundsieb 1 mit einer Einbuchtung l1 versehen (z.B. in Form eines Quersteges mit Freistellung für den vorste- henden Greifer 4 am Gegendruckzylinder 3) . Bei versenktem Greifer 4 (nicht dargestellt) wird im Rundsieb keine Einbuchtung benötigt. In beiden Fällen muss aber die Rakel 2 über der Ein- buchtung l1 oder der Grubenzone mit versenktem Greifer 4 angehoben werden.Fig. 1 shows a rotary screen printing unit integrated on a sheet printing machine. The circular sieve 1 can be provided with or without indentation 1 '. The doctor blade 2 arranged in the interior of the screen is coupled to a device for controlled lifting of the doctor blade 2 (not shown here). On the counter-pressure cylinder 3 there is a sheet 5 which can be gripped by a gripper 4. In the case of the above gripper 4 in the pit zone of the counter-pressure cylinder, the circular screen 1 is provided with an indentation l 1 (for example in the form of a crossbar with a release for the above gripper 4 on the counter-pressure cylinder) 3). When the gripper 4 is sunk (not shown), no indentation is required in the circular sieve. In both cases, however, the squeegee 2 must Bay l 1 or the pit zone can be raised with the gripper 4 recessed.
Fig. 2 zeigt schematisch ein Rotationssiebdruckwerk, welches auf einer Rollendruckmaschine mit Pilgerschritt-Bahntransport integriert ist. Hier ist neben dem Rundsieb 1 mit Rakel 2 (mit angekoppelter, nicht dargestellter Einrichtung zum gesteuerten Anheben der Rakel) ein Gegendruckzylinder 3 mit Freistellungszone 3' vorhanden. Hier muss die Rakel 2 jeweils wegen dem Bahnrückzug (Pilgerschritt) über der Freistellungszone 3' des Gegendruckzylinders 3 angehoben werden.Fig. 2 shows schematically a rotary screen printing unit, which is integrated on a web printing machine with pilgrim web transport. Here, in addition to the rotary screen 1 with a doctor blade 2 (with a coupled device (not shown) for controlled lifting of the doctor blade), there is an impression cylinder 3 with a release zone 3 '. Here, the squeegee 2 has to be lifted above the release zone 3 'of the impression cylinder 3 because of the web retraction (pilgrimage step).
Fig. 3 zeigt das Prinzip eines Rotationssiebdruckwerks, welches auf einer Körperdruckmaschine integriert ist . Auch hier ist das Rundsieb 1 mit einer gesteuert anhebbaren Rakel 2 versehen. Die zu bedruckenden Körper (Gegendruckflächen) können ebene Körper 3 (z.B. Glasplatten) auf einem Transportband 4 oder zylindrische Körper 5 (z.B. Flaschen) sein.Fig. 3 shows the principle of a rotary screen printing unit, which is integrated on a body printing machine. Here, too, the rotary screen 1 is provided with a squeegee 2 which can be raised in a controlled manner. The bodies to be printed (counter pressure surfaces) can be flat bodies 3 (e.g. glass plates) on a conveyor belt 4 or cylindrical bodies 5 (e.g. bottles).
Die zu bedruckenden Körper 3 bzw. 5 bilden die Gegendruckfläche. Zwischen den einzelnen Körpern muss die Rakel 2 angehoben werden.The bodies 3 and 5 to be printed form the counter pressure surface. The squeegee 2 must be raised between the individual bodies.
Fig. 4 zeigt den synchronisierten Antrieb des Rundsiebes 1, der Rakel 2 und des Gegendruckzylinders 3 (hier Gegendruckzylinder mit Freistellungszone einer Pilgerschrittmaschine) eines Siebdruckwerkes .Fig. 4 shows the synchronized drive of the circular screen 1, the doctor blade 2 and the impression cylinder 3 (here impression cylinder with the release zone of a pilgrim stepping machine) of a screen printing unit.
Der synchronisierte Antrieb befindet sich auf einer Seite des Druckwerkes. Auf der anderen Seite des Rundsiebes 1 könnte jedoch eine weitere Kurvenscheibe mit Hebel zur Steuerung der Rakel 2 vorgesehen sein. Der synchronisierte Antrieb von Rundsieb 1, Rakel 2 und Gegendruckzylinder 3 erfolgt im wesentlichen über folgende Elemente: Die Zahnräder 4, 5 dienen, vom Motor 7 angetrieben, dem Antrieb von Rundsieb 1 und Gegendruckzylinder 3.The synchronized drive is on one side of the printing unit. On the other side of the rotary screen 1, however, a further cam disc with a lever for controlling the doctor blade 2 could be provided. The synchronized drive of rotary screen 1, doctor blade 2 and impression cylinder 3 is essentially carried out via the following elements: The gear wheels 4, 5, driven by the motor 7, serve to drive the rotary screen 1 and impression cylinder 3.
Der Motor 7 dient hier dem Antrieb des Druckwerkes. Grundsätzlich könnte der Antrieb auch von einer Maschinenhauptwelle aus erfolgen.The motor 7 is used here to drive the printing unit. In principle, the drive could also be carried out from a machine main shaft.
Über die Zahnräder 6 bis 10 wird ein Zahnrad 11 mit Schrägverzahnung angetrieben, welches Teil der Steuereinrichtung für die Rakel 2 bildet.Via the gears 6 to 10, a gear 11 is driven with helical teeth, which forms part of the control device for the doctor blade 2.
Über ein weiteres Zahnrad 12 mit Schrägverzahnung, welches über einen Stellmechanismus 13 quer verschiebbar gelagert ist, wird die Kurvenscheibe 14 angetrieben. Mit dem Stellmechanismus 13 lässt sich die Phase der Kurvenscheibe 14 einstellen (auch wäh- rend dem Lauf) , dies dank der Schrägverzahnung mit hoher Präzision.The cam disk 14 is driven via a further gear wheel 12 with helical teeth, which is mounted so as to be transversely displaceable via an adjusting mechanism 13. With the adjusting mechanism 13, the phase of the cam disk 14 can be adjusted (even during the run), thanks to the helical teeth with high precision.
Die Kurvenscheibe 14 kann eine feste oder eine variable Kontur aufweisen (z.B. dank dem Aufbau durch zwei aneinanderliegende, gegeneinander verdrehbare Scheiben) .The cam disk 14 can have a fixed or a variable contour (e.g. thanks to the construction by two adjacent disks that can be rotated against each other).
Über eine Laufrolle 15 und den Rakelhebel 16 (z.B. eine ArtVia a roller 15 and the squeegee lever 16 (e.g. a kind
Kipphebel, im Punkt 16' kippbar gehalten) wird schliesslich die Rakel gesteuert (abgehoben). Durch die Lagerung im Punkt 16' kann der Rakeldruck eingestellt werden. Bei zwei Kurvenscheiben ist die Halterung und Steuerung der Rakel 2 wesentlich präzi- ser, und der Anpressdruck lässt sich besser regulieren.Rocker arm, held at point 16 'tiltable) the squeegee is finally controlled (lifted). The doctor blade pressure can be adjusted by the storage in point 16 '. With two cams, the holder and control of the squeegee 2 are much more precise and the contact pressure can be better regulated.
Für den Antrieb ist neben der gezeigten, rein mechanischen Lösung auch ein gemischt elektro-mechanischer Antrieb denkbar. Fig. 5 zeigt eine ähnliche Darstellung wie Fig. 4, nämlich ein Rotationssiebdruckwerk mit diskontinuierlichem Rakeldruck. Beim gezeigten Beispiel werden Rundsieb 1, Rakel 2 bzw. Steuerkurvenscheiben 14 und Gegendruckzylinder 3 (gezeigt als Pilger- schrittmaschine) mittels drei unabhängiger Motoren 17, 18, 19 angetrieben, was bei der Synchronisation eine maximale Flexibilität der Einstellungen erlaubt.In addition to the purely mechanical solution shown, a mixed electro-mechanical drive is also conceivable for the drive. FIG. 5 shows a representation similar to FIG. 4, namely a rotary screen printing unit with discontinuous doctor blade printing. In the example shown, rotary screen 1, doctor blade 2 or control cam disks 14 and impression cylinder 3 (shown as a pilgrim stepping machine) are driven by three independent motors 17, 18, 19, which allows maximum flexibility in the settings during synchronization.
Auch hier können die Kurvenscheiben 14 eine feste oder variable Kontur aufweisen (siehe Erläuterungen zu Fig. 4) und der Rakel- druck im Lagerpunkt 16' der Rakelhebel eingestellt werden.Here, too, the cam disks 14 can have a fixed or variable contour (see explanations for FIG. 4) and the doctor blade pressure can be set in the bearing point 16 'of the doctor blade lever.
Der Rakeldruck lässt sich während des Laufes (Druckvorgang, siehe Papierbahn 20) verstellen.The doctor blade pressure can be adjusted during the run (printing process, see paper web 20).
Die Rakel 2 muss immer dann abgehoben werden, wenn kein Gegendruck vorhanden ist, da sonst das Rundsieb 1 beschädigt werden kann.The squeegee 2 must always be lifted when there is no back pressure, otherwise the circular screen 1 can be damaged.
Dank den unabhängigen Antrieben lässt sich z.B. das Rundsieb in eine Stellung drehen, in welcher keine Farbe auslaufen kann, insbesondere aber in die richtige Stellung bei beliebiger Einsetzposition des Siebes. Thanks to the independent drives, e.g. turn the circular sieve into a position in which no color can run out, but in particular into the correct position in any position of the sieve.

Claims

Patentansprüche: Claims:
1. Siebdruckwerk mit einem Rundsieb mit darin angeordneter Rakel, einer Gegendruckfläche für das Rundsieb, Antriebsmitteln und einer Einrichtung zum gesteuerten Abheben der Rakel während dem Druckvorgang, dadurch gekennzeichnet, dass die Steuereinrichtung für die Rakel mindestens eine Kurvenscheibe aufweist, um die Rakel während des Laufes über einen Rakelhebel in die jeweils gewünschte Stellung zu bewegen.1. Screen printing unit with a circular screen with a doctor blade arranged therein, a counter-pressure surface for the rotary screen, drive means and a device for controlled lifting of the doctor blade during the printing process, characterized in that the control device for the doctor blade has at least one cam to the doctor blade during the run to move into the desired position using a squeegee lever.
2. Siebdruckwerk nach Anspruch 1, dadurch gekennzeichnet, dass für jede Rakel zwei identisch ausgebildete, parallel auf einer gemeinsamen Welle angeordnete Kurvenscheiben vorgesehen sind, über welche zwei Rakelhebel betätigt werden, welche von beiden Seiten her in die Rundsiebtrommel an der Rakel angreifen.2. Screen printing unit according to claim 1, characterized in that for each squeegee two identically designed, parallel on a common shaft cam discs are provided, via which two squeegee levers are actuated, which attack from both sides in the rotary screen drum on the squeegee.
3. Siebdruckwerk nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Mittel vorgesehen sind, um den Anpressdruck der Rakel in ihrer normalen Arbeitsstellung einzustellen.3. Screen printing unit according to claim 1 or 2, characterized in that means are provided to adjust the contact pressure of the squeegee in its normal working position.
4. Siebdruckwerk nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, dass Rundsieb, Gegendruckfläche und die Steuer- einrichtung für die Rakel synchron angetrieben sind.4. Screen printing unit according to one of claims 1 to 3, characterized in that the circular screen, counter pressure surface and the control device for the doctor blade are driven synchronously.
5. Siebdruckwerk nach Anspruch 4, dadurch gekennzeichnet, dass ein einziger Antriebsmotor vorgesehen ist und die verschiedenen Komponenten des Druckwerkes über ein mechanisches Getriebe synchron miteinander in Anriebsverbindung stehen.5. Screen printing unit according to claim 4, characterized in that a single drive motor is provided and the various components of the printing unit are in synchronous connection with one another via a mechanical transmission.
6. Siebdruckwerk nach Anspruch 4, dadurch gekennzeichnet, dass für einzelne Komponenten oder Komponentengruppen des Druckwerkes separate Antriebe vorgesehen sind, welche elektrisch bzw. elektronisch synchronisiert sind. 6. Screen printing unit according to claim 4, characterized in that separate drives are provided for individual components or groups of components of the printing unit, which are electrically or electronically synchronized.
7. Siebdruckwerk nach Anspruch 5, dadurch gekennzeichnet, dass die Grundeinstellung der Kurvenscheibe bzw. Kurvenscheiben durch passende Einstellung des Antriebsgetriebes für die Kur- venscheibenwelle erfolgt, z.B. durch Mittel zum seitlichen Ver- schieben von zwei ineinandergreifenden Zahnrädern mit Schrägverzahnung.7. Screen printing unit according to claim 5, characterized in that the basic setting of the cam disk or cam disks is carried out by appropriately adjusting the drive gear for the cam disk shaft, e.g. by means of lateral displacement of two intermeshing gearwheels with helical teeth.
8. Siebdruckwerk nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kurvenscheiben eine unveränderliche Kontur aufweisen.8. Screen printing unit according to one of claims 1 to 7, characterized in that the cams have an invariable contour.
9. Siebdruckwerk nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kurvenscheiben eine variable Kontur aufweisen, z.B. durch einen Grundaufbau in Form von zwei gegeneinander verdrehbaren Scheiben. 9. Screen printing unit according to one of claims 1 to 7, characterized in that the cams have a variable contour, e.g. due to a basic structure in the form of two rotatable disks.
EP98938578A 1997-10-14 1998-08-26 Screen printing installation Expired - Lifetime EP1023178B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH239397 1997-10-14
CH239397 1997-10-14
PCT/CH1998/000368 WO1999019146A1 (en) 1997-10-14 1998-08-26 Screen printing installation

Publications (2)

Publication Number Publication Date
EP1023178A1 true EP1023178A1 (en) 2000-08-02
EP1023178B1 EP1023178B1 (en) 2002-09-25

Family

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EP98938578A Expired - Lifetime EP1023178B1 (en) 1997-10-14 1998-08-26 Screen printing installation

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US (1) US6412407B1 (en)
EP (1) EP1023178B1 (en)
JP (1) JP2001519263A (en)
KR (1) KR20010031083A (en)
AU (1) AU751564B2 (en)
CA (1) CA2306951A1 (en)
DE (1) DE59805735D1 (en)
DK (1) DK1023178T3 (en)
ES (1) ES2183401T3 (en)
WO (1) WO1999019146A1 (en)

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CN100406252C (en) * 2002-08-19 2008-07-30 浙江印染机械有限公司 Dual purpose circular screen printing machine
EP1946925A3 (en) * 2007-01-22 2010-12-22 Komori Corporation Ink transfer member position adjusting method and apparatus of rotary stencil printing press
DE102010021062A1 (en) 2010-05-19 2011-11-24 Gallus Ferd. Rüesch AG Flat screen material and sieve
DE102012011901A1 (en) 2012-06-14 2013-12-19 Gallus Ferd. Rüesch AG Flat screen material and sieve
DE102013006698A1 (en) 2013-04-18 2014-10-23 Gallus Ferd. Rüesch AG Rotary screen, mounting device, exposure device and washing device with quick release
DE102013009462A1 (en) 2013-06-06 2014-12-11 Gallus Ferd. Rüesch AG Method for producing a screen structure
CN106061739B (en) 2014-02-20 2018-08-03 加卢斯费迪南德吕施股份公司 Printing screen and method for being imaged printing screen
JP6358703B2 (en) * 2014-10-23 2018-07-18 株式会社小森コーポレーション Rotary screen printing machine
JP6541209B2 (en) * 2014-10-23 2019-07-10 株式会社小森コーポレーション Rotary screen printing machine
DE102014226869B4 (en) * 2014-12-22 2022-03-17 Koenig & Bauer Ag Squeegee device for a screen printing machine and screen printing machine
DE102020101680A1 (en) 2020-01-24 2021-07-29 Koenig & Bauer Ag Method for operating a screen printing unit in a printing machine
BE1029333B1 (en) * 2021-04-23 2022-11-28 Ace Packaging N V Method for applying a coating to a packaging material, and coating application device

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Also Published As

Publication number Publication date
WO1999019146A1 (en) 1999-04-22
EP1023178B1 (en) 2002-09-25
AU751564B2 (en) 2002-08-22
JP2001519263A (en) 2001-10-23
KR20010031083A (en) 2001-04-16
ES2183401T3 (en) 2003-03-16
DE59805735D1 (en) 2002-10-31
AU8725598A (en) 1999-05-03
US6412407B1 (en) 2002-07-02
DK1023178T3 (en) 2003-01-27
CA2306951A1 (en) 1999-04-22

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