EP0903230B1 - Method and device for removing stencil coatings on screen printing forms - Google Patents

Method and device for removing stencil coatings on screen printing forms Download PDF

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Publication number
EP0903230B1
EP0903230B1 EP98114323A EP98114323A EP0903230B1 EP 0903230 B1 EP0903230 B1 EP 0903230B1 EP 98114323 A EP98114323 A EP 98114323A EP 98114323 A EP98114323 A EP 98114323A EP 0903230 B1 EP0903230 B1 EP 0903230B1
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EP
European Patent Office
Prior art keywords
ultrasound
carrier
stencil
screen printing
liquid bath
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EP98114323A
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German (de)
French (fr)
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EP0903230A2 (en
EP0903230A3 (en
Inventor
Harry Dr. Kallweit
Jürgen Stieler
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Kissel & Wolf GmbH
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Kissel & Wolf GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/003—Cleaning arrangements or devices for screen printers or parts thereof
    • B41F35/005—Cleaning arrangements or devices for screen printers or parts thereof for flat screens

Definitions

  • the invention relates to a method for removing Stencil coatings on screen printing forms, in particular their template carriers. Furthermore, the Invention on a device for performing this Process.
  • the stencil coating is removed at certain intervals , for example around the screen printing form to prepare for the production of another printed image.
  • chemical ones are still used for this Means used, especially when it are hardened stencil coatings.
  • very strong oxidizing agents iodates or periodate, manganese peroxide, osmium tetraoxide, selenium dioxide etc.
  • polyvinyl alcohol or cellulose layers required.
  • Enzymes used. In any case, the wastewater badly affected, so the sewage must be processed in expensive plants.
  • DE-A-28 27 163 describes a process for cleaning cylindrical screen printing forms, in which the Screen printing form immersed vertically in a tank and charged with a cleaning liquid from the inside becomes. To support the cleaning process several ultrasound generators are arranged in the tank, which generate an ultrasonic field in the liquid. At the The printing form screen will also be removed on the outside sprayed with a cleaning liquid and additionally Air blown.
  • JP-A-5 220 460 describes a method in which an object, for example the screen of a printing press, inserted in a liquid bath and an ultrasonic generator so far immersed in the liquid bath is that there is only a small gap between the ultrasonic generator and object remains with the cleaning liquid is filled.
  • Metal masks or screen masks in a liquid bath of printing material such as solder paste
  • by cleaning the mask in a liquid bath immersed and moved back and forth by means of a mechanism as well as an additional ultrasound device is applied.
  • such a procedure is for the decoating of screen printing forms, i.e. the Removal of the stencil coating, not suitable.
  • the invention has for its object a method to provide with the screen printing forms without the Let the use of chemicals be decoated, and at the the outlay on equipment is comparatively low.
  • a another object is to provide a device for Propose implementation of this procedure.
  • the first part of the task is according to the invention solved that the screen printing form with the stencil holder in a liquid bath immersed and by the action of a Ultrasonic device with at least one ultrasonic generator is decoated by this or these is or will be created on the template carrier and remains applied during ultrasound generation or stay.
  • the basic idea of the invention is therefore the use ultrasound in a liquid, especially water bath, in such a way that direct contact between Ultrasonic generator (s) and screen printing form are created.
  • the template holder can then no longer swing through evade so that the full pressure of the ultrasonic generator (s) is taken over. This leads to a Detonation of the stencil coating, the effect is also present on the back. Should this effect not sufficient, the screen printing form after the first stripping process and then again exposed to ultrasound.
  • the ultrasound consists of high-frequency sound waves with frequencies above 16 kHz which are vaporized in the liquid or create gas bubbles after an expansion phase implode. This creates high pressure surges and turbulence and also heat waves that when exposed towards the stencil holder with the appropriate intensity de-coating.
  • the intensity of the ultrasound device can be set so that this the template carrier is not attacked.
  • the advantages over the chemical processes lie in the fact that the use of chemicals completely can be dispensed with, d. H. all related Disadvantages such as pollution, air emissions, fire risk, Risk of chemical burns and the provision of such chemicals fall away here.
  • the detached stencil coatings can by simple filtering or Precipitation from the aqueous medium of the liquid bath be removed and deposited, unless they have been processed can be. Thorough cleaning results even at the crosshairs of the stencil carrier fabric, even if hardened stencil layers available.
  • the ultrasound to act is limited to parts of the template carrier and the ultrasonic device and the template carrier relative and be moved parallel to each other. That way there is the possibility of areas of the template carrier to exclude the effect of ultrasound, so that existing there Stencil adhesives or stencil coatings not attacked become.
  • a device for performing the above is characterized in that the Ultrasound generator abuts on the template carrier or issue. It is clear that this device is relative simply constructed and thus the expenditure on equipment is low is.
  • the installation of the ultrasonic generator (s) can, for example done with the help of a lifting device.
  • the ultrasound device is arranged on a support is that is movable in a horizontal plane, so the entire surface of the template carrier with ultrasound can be applied.
  • the carrier is designed as a girder bridge which is on both sides in the edge area of the liquid pan is guided, the support bridge expediently designed to be movable in one direction and the ultrasound device transverse to it relative to the carrier is suspended.
  • the ultrasound device has several ultrasound generators, also called sonotrodes.
  • the device 1 to be seen in perspective in FIG. 1 has a tub 2 rectangular plan that one flat floor 3 and four vertical side walls 4, 4 ', 5, 5'.
  • the side walls 4, 4 ', 5, 5 ' are shown transparently so that it is visible that a flat screen printing form 6 is inserted into the tub 2 is, which consists of a rectangular printing form frame 7 and one of this spanned template carrier 8 from one fine plastic fabric.
  • the tub 2 is with Filled with water, the mirror of which is marked by line 9 is.
  • the mirror 9 lies above the screen printing form 6, d. H. it is complete and at a distance from Mirror 9 immersed.
  • the tub 2 has two drains 10, 11 in the bottom 3, which in a filter 12 converge. Be in this filter 12 detached coating particles collected so that the drained water is discharged into the sewer system can be.
  • the carrier bridge 15 spans the tub 12 in Y-direction.
  • An ultrasound device hangs on the carrier bridge 15 18 consisting of four in the Y direction side by side arranged ultrasound generators 19, 20, 21, 22 assembled is.
  • the ultrasound device 18 is in the Y direction movably suspended on the carrier bridge 15.
  • the ultrasound generators 19, 20, 21, 22 protrude downwards into the water 9 and lie with their underside Ends on the template carrier 8. This will be particularly by the enlarged view in Fig. 2 clearly.
  • Fig. 2 In the position shown in Fig. 2 is the effect the ultrasonic device 18 so strong that the stencil coating is blown up and in the form of template particles - designated by way of example at 23 - replaced becomes.
  • the template particles 23 are after completion the impact of ultrasound with the water in the drains 10, 11 washed out and caught in the filter 12.

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

The screen printing form (6) is dipped with the template support (8) in a fluid bath (9) so that its coating is removed through the action of an ultrasound device (18) set against the template support. The ultrasound action can be restricted to parts of the template support whereby the ultrasound device and template support can move relative and parallel to each other. The ultrasound device can be mounted on a lift mechanism.

Description

Die Erfindung betrifft ein Verfahren zur Entfernung von Schablonenbeschichtungen auf Siebdruckformen, insbesondere deren Schablonenträgern. Desweiteren bezieht sich die Erfindung auf eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for removing Stencil coatings on screen printing forms, in particular their template carriers. Furthermore, the Invention on a device for performing this Process.

Für den Sieb- und Filmdruck werden im Prinzip zwei verschiedene Druckformen verwendet. Für den Flachsiebdruck kommt eine ebene Siebdruckform zur Anwendung, bei der der Schablonenträger auf einen rechteckigen Siebdruckrahmen aufgespannt ist und im wesentlichen aus einer gewebten Gaze aus Kunststoff- oder Metallfäden besteht. Für den Rotationssiebdruck (Filmdruck) ist eine zylindrische Druckform vorgesehen, bei der sich der Schablonenträger als zylindrischer Mantel zwischen zwei Endringen erstreckt. Gewöhnlich wird der Schablonenträger bei Rotationsdruckformen galvanisch aus Nickel hergestellt.In principle, two different ones are used for screen and film printing Printing forms used. For flat screen printing a flat screen printing form is used, in which the Stencil holder on a rectangular screen printing frame is stretched and essentially of a woven Gauze consists of plastic or metal threads. For the Rotary screen printing (film printing) is a cylindrical one Printing form provided in which the stencil holder extends as a cylindrical jacket between two end rings. The stencil carrier is usually used in rotary printing forms galvanically made of nickel.

Um ein bestimmtes Druckbild zu erreichen, werden Teile des Schablonenträgers, die nicht drucken sollen, mittels einer als Sperrschicht wirkenden Schablonenbeschichtung versehen, so daß sich farbundurchlässige und farbdurchlässige Bereiche ergeben. Für die Herstellung der Schablonenbeschichtung gibt es verschiedene Verfahren.To achieve a certain print image, parts of the stencil carrier, which should not print, by means of a stencil coating acting as a barrier layer provided so that there are opaque and translucent Areas result. For the production of the stencil coating there are different procedures.

In gewissen Abständen steht die Entfernung der Schablonenbeschichtung an, beispielsweise um die Siebdruckform für die Herstellung eines anderen Druckbildes herzurichten. Im allgemeinen werden hierfür immer noch chemische Mittel verwendet, und zwar insbesondere dann, wenn es sich um gehärtete Schablonenbeschichtungen handelt. In diesem Fall sind sehr starke Oxidationsmittel (Jodate oder Periodate, Manganperoxid, Osmiumtetraoxid, Selendioxid usw.) aufbauend auf Polyvinylalkohol- oder Celluloseschichten erforderlich. Bei Gelatineschichten werden Enzyme eingesetzt. Auf jeden Fall wird hierdurch das Abwasser stark in Mitleidenschaft gezogen, so daß das Abwasser in teuren Anlagen aufbereitet werden muß.The stencil coating is removed at certain intervals , for example around the screen printing form to prepare for the production of another printed image. Generally, chemical ones are still used for this Means used, especially when it are hardened stencil coatings. In In this case, very strong oxidizing agents (iodates or periodate, manganese peroxide, osmium tetraoxide, selenium dioxide etc.) based on polyvinyl alcohol or cellulose layers required. With gelatin layers Enzymes used. In any case, the wastewater badly affected, so the sewage must be processed in expensive plants.

In jüngerer Zeit sind Vorschläge gemacht worden, Schablonenbeschichtungen mit Hilfe von Wasserstrahlen mit teilweise sehr hohen Drücken zu entfernen (vgl. EP 0 391 491 A1; EP 0 641 649 A1). Dabei kann auf die Anwendung von chemischen Substanzen nur dann verzichtet werden, wenn besonders hohe Drücke angewendet werden. Die hierfür erforderlichen Vorrichtungen sind aufwendig und deshalb teuer. Außerdem müssen Vorkehrungen getroffen werden, damit die Siebdruckform nicht durch den Wasserstrahl beschädigt wird. Recently, proposals have been made for stencil coatings with the help of water jets with partial to remove very high pressures (cf. EP 0 391 491 A1; EP 0 641 649 A1). The application of chemical substances can only be dispensed with if particularly high pressures are used. The necessary for this Devices are expensive and therefore expensive. Precautions must also be taken to ensure that the screen printing form is not damaged by the water jet becomes.

In der DE-A-28 27 163 ist ein Verfahren zur Reinigung von zylindrischen Siebdruckformen offenbart, bei dem die Siebdruckform senkrecht in einen Tank eingetaucht und dort von innen mit einer Reinigungsflüssigkeit beaufschlagt wird. Zur Unterstützung des Reinigungsprozesses sind in dem Tank mehrere Ultraschallerzeuger angeordnet, die in der Flüssigkeit ein Ultraschallfeld erzeugen. Beim Herausnehmen wird das Druckformsieb auch auf der Außenseite mit einer Reinigungsflüssigkeit besprüht und zusätzlich Luft angeblasen.DE-A-28 27 163 describes a process for cleaning cylindrical screen printing forms, in which the Screen printing form immersed vertically in a tank and charged with a cleaning liquid from the inside becomes. To support the cleaning process several ultrasound generators are arranged in the tank, which generate an ultrasonic field in the liquid. At the The printing form screen will also be removed on the outside sprayed with a cleaning liquid and additionally Air blown.

In der JP-A-5 220 460 ist ein Verfahren beschrieben, bei dem ein Objekt, beispielsweise das Sieb einer Druckmaschine, in ein Flüssigkeitsbad eingesetzt und ein Ultraschallerzeuger so weit in das Flüssigkeitsbad eingetaucht wird, daß nur noch ein geringer Spalt zwischen Ultraschallerzeuger und Objekt verbleibt, der mit Reinigungsflüssigkeit befüllt ist. Aus der JP-A-4-351592 ist es bekannt, Metallmasken oder Siebmasken in einem Flüssigkeitsbad von Druckmaterial, wie beispielsweise Lötpaste, dadurch zu reinigen, daß die Maske in ein Flüssigkeitsbad eingetaucht und mittels einer Mechanik hin- und herbewegt wird sowie zusätzlich durch eine Ultraschalleinrichtung beaufschlagt wird. Ein solches Verfahren ist jedoch für die Entschichtung von Siebdruckformen, also die Entfernung der Schablonenbeschichtung, nicht geeignet.JP-A-5 220 460 describes a method in which an object, for example the screen of a printing press, inserted in a liquid bath and an ultrasonic generator so far immersed in the liquid bath is that there is only a small gap between the ultrasonic generator and object remains with the cleaning liquid is filled. From JP-A-4-351592 it is known Metal masks or screen masks in a liquid bath of printing material, such as solder paste, by cleaning the mask in a liquid bath immersed and moved back and forth by means of a mechanism as well as an additional ultrasound device is applied. However, such a procedure is for the decoating of screen printing forms, i.e. the Removal of the stencil coating, not suitable.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bereitzustellen, mit dem sich Siebdruckformen ohne den Einsatz von Chemikalien entschichten lassen, und bei dem der apparative Aufwand vergleichsweise gering ist. Eine weitere Aufgabe besteht darin, eine Vorrichtung zur Durchführung dieses Verfahrens vorzuschlagen.The invention has for its object a method to provide with the screen printing forms without the Let the use of chemicals be decoated, and at the the outlay on equipment is comparatively low. A another object is to provide a device for Propose implementation of this procedure.

Der erste Teil der Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Siebdruckform mit dem Schablonenträger in ein Flüssigkeitsbad eingetaucht und durch Einwirkung einer Ultraschalleinrichtung mit wenigstens einem Ultraschallerzeuger entschichtet wird, indem dieser bzw. diese an dem Schablonenträger angelegt wird bzw. werden und während der Ultraschallerzeugung angelegt bleibt bzw. bleiben. Grundgedanke der Erfindung ist also der Einsatz von Ultraschall in einem Flüssigkeits-, insbesondere Wasserbad, in der Weise, daß ein direkter Kontakt zwischen Ultraschallerzeuger(n) und Siebdruckform entsteht. Der Schablonenträger kann dann nicht mehr durch Mitschwingen ausweichen, so daß der volle Druck des bzw. der Ultraschallerzeuger(s) übernommen wird. Dies führt zu einer Sprengung der Schablonenbeschichtung, wobei die Wirkung auch auf der Rückseite vorhanden ist. Sollte diese Wirkung nicht ausreichen, kann die Siebdruckform nach dem ersten Entschichtungsvorgang umgedreht und dann nochmals der Ultraschalleinwirkung ausgesetzt werden.The first part of the task is according to the invention solved that the screen printing form with the stencil holder in a liquid bath immersed and by the action of a Ultrasonic device with at least one ultrasonic generator is decoated by this or these is or will be created on the template carrier and remains applied during ultrasound generation or stay. The basic idea of the invention is therefore the use ultrasound in a liquid, especially water bath, in such a way that direct contact between Ultrasonic generator (s) and screen printing form are created. The The template holder can then no longer swing through evade so that the full pressure of the ultrasonic generator (s) is taken over. This leads to a Detonation of the stencil coating, the effect is also present on the back. Should this effect not sufficient, the screen printing form after the first stripping process and then again exposed to ultrasound.

Der Ultraschall besteht aus hochfrequenten Schallwellen mit Frequenzen über 16 kHz, die in der Flüssigkeit Dampf- oder Gasblasen entstehen lassen, die nach einer Expansionsphase implodieren. Hierdurch entstehen hohe Druckstöße und Turbulenzen und auch Hitzewellen, die bei Einwirkung auf den Schablonenträger bei entsprechender Intensität zu einer Entschichtung führt. Die Intensität der Ultraschalleinrichtung kann so eingestellt werden, daß hierdurch der Schablonenträger nicht angegriffen wird.The ultrasound consists of high-frequency sound waves with frequencies above 16 kHz which are vaporized in the liquid or create gas bubbles after an expansion phase implode. This creates high pressure surges and turbulence and also heat waves that when exposed towards the stencil holder with the appropriate intensity de-coating. The intensity of the ultrasound device can be set so that this the template carrier is not attacked.

Die Vorteile gegenüber den chemisch arbeitenden Verfahren liegen darin, daß auf den Einsatz von Chemikalien vollständig verzichtet werden kann, d. h. alle damit verbundenen Nachteile, wie Verschmutzung, Luftemission, Brandgefahr, Verätzungsgefahr sowie das Vorhalten solcher Chemikalien fallen hier weg. Die abgelösten Schablonenbeschichtungen können durch einfaches Abfiltrieren oder Ausfällen aus dem wäßrigen Medium des Flüssigkeitsbades entfernt und deponiert werden, soweit sie nicht aufbereitet werden können. Es ergibt sich eine gründliche Reinigung selbst an den Fadenkreuzungen des Gewebes des Schablonenträgers, selbst wenn gehärtete Schablonenschichten vorhanden sind.The advantages over the chemical processes lie in the fact that the use of chemicals completely can be dispensed with, d. H. all related Disadvantages such as pollution, air emissions, fire risk, Risk of chemical burns and the provision of such chemicals fall away here. The detached stencil coatings can by simple filtering or Precipitation from the aqueous medium of the liquid bath be removed and deposited, unless they have been processed can be. Thorough cleaning results even at the crosshairs of the stencil carrier fabric, even if hardened stencil layers available.

Im Vergleich zu der Entfernung mit Hilfe von Wasserstrahlen ist der apparative Aufwand wesentlich geringer. Auch die anfallenden Flüssigkeitsmengen halten sich in Grenzen. So reicht für eine flache Siebdruckform ein Flüssigkeitsbad aus, bei dem die Siebdruckform gerade eben eintaucht.Compared to the distance using water jets the outlay on equipment is considerably less. Also the amount of liquid is limited. A liquid bath is sufficient for a flat screen printing form where the screen printing form is just dipping.

Es kann zweckmäßig sein, daß die Ultraschalleinwirkung auf Teile des Schablonenträgers begrenzt wird und die Ultraschalleinrichtung und der Schablonenträger relativ und parallel zueinander bewegt werden. Auf diese Weise besteht die Möglichkeit, Bereiche des Schablonenträgers von der Ultraschalleinwirkung auszunehmen, damit dort vorhandene Schablonenklebstoffe oder Schablonenlacke nicht angegriffen werden.It may be appropriate for the ultrasound to act is limited to parts of the template carrier and the ultrasonic device and the template carrier relative and be moved parallel to each other. That way there is the possibility of areas of the template carrier to exclude the effect of ultrasound, so that existing there Stencil adhesives or stencil coatings not attacked become.

Eine Vorrichtung zur Durchführung des vorbeschriebenen Verfahrens ist dadurch gekennzeichnet, daß der bzw. die Ultraschallerzeuger an dem Schablonenträger anliegt bzw. anliegen. Es wird deutlich, daß diese Vorrichtung relativ einfach aufgebaut und somit der apparative Aufwand gering ist.A device for performing the above The method is characterized in that the Ultrasound generator abuts on the template carrier or issue. It is clear that this device is relative simply constructed and thus the expenditure on equipment is low is.

Das Anlagen des bzw. der Ultraschallerzeuger kann beispielsweise mit Hilfe einer Hubeinrichtung geschehen.The installation of the ultrasonic generator (s) can, for example done with the help of a lifting device.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, daß die Ultraschalleinrichtung an einem Träger angeordnet ist, der in einer horizontalen Ebene verfahrbar ist, damit die gesamte Fläche des Schablonenträgers mit Ultraschall beaufschlagt werden kann. Konkret kann dies dadurch geschehen, daß der Träger als Trägerbrücke ausgebildet ist, welche beidseits im Randbereich der Flüssigkeitswanne verfahrbar geführt ist, wobei die Trägerbrücke zweckmäßigerweise in einer Richtung verfahrbar ausgebildet und die Ultraschalleinrichtung quer dazu relativ zu dem Träger verfahrbar aufgehängt ist.According to a further feature of the invention, that the ultrasound device is arranged on a support is that is movable in a horizontal plane, so the entire surface of the template carrier with ultrasound can be applied. This can be done in concrete terms happen that the carrier is designed as a girder bridge which is on both sides in the edge area of the liquid pan is guided, the support bridge expediently designed to be movable in one direction and the ultrasound device transverse to it relative to the carrier is suspended.

Zur Beschleunigung der Entschichtung kann es vorteilhaft sein, wenn die Ultraschalleinrichtung mehrere Ultraschallerzeuger, auch Sonotroden genannt, aufweist. It can be advantageous to accelerate the stripping be if the ultrasound device has several ultrasound generators, also called sonotrodes.

Zum Auffangen der abgelösten Beschichtungsteilchen sollte in dem Abfluß der Flüssigkeitswanne eine Filtereinrichtung vorgesehen sein.To catch the detached coating particles should a filter device in the drain of the liquid pan be provided.

In der Zeichnung ist die Erfindung anhand eines schematisch dargestellten Ausführungsbeispiels näher veranschaulicht. Es zeigen:

Fig. 1
eine Schrägansicht einer Vorrichtung zur Entschichtung von flachen Siebdruckformen und
Fig. 2
ein Teilquerschnitt durch die Vorrichtung gemäß Fig. 1.
The invention is illustrated in more detail in the drawing with the aid of a schematically illustrated exemplary embodiment. Show it:
Fig. 1
an oblique view of a device for stripping flat screen printing forms and
Fig. 2
2 shows a partial cross section through the device according to FIG. 1.

Die in Fig. 1 perspektivisch zu sehende Vorrichtung 1 weist eine Wanne 2 rechteckigen Grundrisses auf, die einen ebenen Boden 3 und vier senkrecht hochstehende Seitenwände 4, 4', 5, 5' aufweist. Die Seitenwände 4, 4', 5, 5' sind durchsichtig dargestellt, so daß sichtbar ist, daß in die Wanne 2 eine flache Siebdruckform 6 eingelegt ist, welche aus einem rechteckigen Druckformrahmen 7 und einen von diesem aufgespannten Schablonenträger 8 aus einem feinen Kunststoffgewebe besteht. Die Wanne 2 ist mit Wasser gefüllt, deren Spiegel durch die Linie 9 gekennzeichnet ist. Der Spiegel 9 liegt oberhalb der Siebdruckform 6, d. h. sie ist vollständig und mit Abstand zum Spiegel 9 eingetaucht.The device 1 to be seen in perspective in FIG. 1 has a tub 2 rectangular plan that one flat floor 3 and four vertical side walls 4, 4 ', 5, 5'. The side walls 4, 4 ', 5, 5 'are shown transparently so that it is visible that a flat screen printing form 6 is inserted into the tub 2 is, which consists of a rectangular printing form frame 7 and one of this spanned template carrier 8 from one fine plastic fabric. The tub 2 is with Filled with water, the mirror of which is marked by line 9 is. The mirror 9 lies above the screen printing form 6, d. H. it is complete and at a distance from Mirror 9 immersed.

Die Wanne 2 hat im Boden 3 zwei Abflüsse 10, 11, die in einem Filter 12 zusammenlaufen. In diesem Filter 12 werden abgelöste Beschichtungsteilchen aufgefangen, so daß das abfließende Wasser gereinigt in die Kanalisation gegeben werden kann.The tub 2 has two drains 10, 11 in the bottom 3, which in a filter 12 converge. Be in this filter 12 detached coating particles collected so that the drained water is discharged into the sewer system can be.

Die beiden in Y-Richtung gegenüberliegenden Seitenwände 5, 5' weisen an ihren Oberkanten angeformte Führungsbahnen 13, 14 auf - sie können beispielsweise als Führungsschienen ausgebildet sein -, auf denen eine Trägerbrücke 15 mittels Fahrwerken 16, 17 in X-Richtung verfahrbar geführt ist. Die Trägerbrücke 15 überspannt die Wanne 12 in Y-Richtung. An der Trägerbrücke 15 hängt eine Ultraschalleinrichtung 18, die aus vier in Y-Richtung nebeneinander angeordneten Ultraschallerzeugern 19, 20, 21, 22 zusammengesetzt ist. Die Ultraschalleinrichtung 18 ist in Y-Richtung verfahrbar an der Trägerbrücke 15 aufgehängt. Die Ultraschallerzeuger 19, 20, 21, 22 ragen nach unten in das Wasser 9 hinein und liegen mit ihren untenseitigen Enden an dem Schablonenträger 8 an. Dies wird insbesondere durch die vergrößerte Darstellung in Fig. 2 deutlich.The two side walls opposite in the Y direction 5, 5 'have guideways formed on their upper edges 13, 14 on - they can be used as guide rails, for example be trained - on which a girder bridge 15 guided by means of trolleys 16, 17 movable in the X direction is. The carrier bridge 15 spans the tub 12 in Y-direction. An ultrasound device hangs on the carrier bridge 15 18 consisting of four in the Y direction side by side arranged ultrasound generators 19, 20, 21, 22 assembled is. The ultrasound device 18 is in the Y direction movably suspended on the carrier bridge 15. The ultrasound generators 19, 20, 21, 22 protrude downwards into the water 9 and lie with their underside Ends on the template carrier 8. This will be particularly by the enlarged view in Fig. 2 clearly.

In der in Fig. 2 ersichtlichen Stellung ist die Wirkung der Ultraschalleinrichtung 18 so stark, daß die Schablonenbeschichtung aufgesprengt wird und in Form von Schablonenteilchen - beispielhaft mit 23 bezeichnet - abgelöst wird. Die Schablonenteilchen 23 werden nach Abschluß der Ultraschalleinwirkung mit dem Wasser in die Abflüsse 10, 11 hinausgeschwemmt und in dem Filter 12 aufgefangen.In the position shown in Fig. 2 is the effect the ultrasonic device 18 so strong that the stencil coating is blown up and in the form of template particles - designated by way of example at 23 - replaced becomes. The template particles 23 are after completion the impact of ultrasound with the water in the drains 10, 11 washed out and caught in the filter 12.

Claims (9)

  1. Method for removing stencil coatings on screen printing forms (6), particularly their stencil carriers (8), whereby the screen printing form (6) is immersed with the stencil carrier (8) in a liquid bath (9) and the coating removed by the action of an ultrasound apparatus (18) with at least one ultrasound generator (19, 20, 21, 22) in that this/these is/are applied to the stencil carrier (8) and remain(s)applied to it during the ultrasound generation.
  2. Method according to Claim 1, characterised in that the action of the ultrasound is limited to parts of the stencil carrier (8) and that the ultrasound apparatus (18) and the stencil carrier (8) are moved relative and parallel to each other.
  3. Device for implementing the method according to Claim 1 or 2, having a liquid bath (2, 3, 4, 5) with placed in it a screen printing form (6) having a stencil carrier (8) and with an ultrasound apparatus (18) with at least one ultrasound generator (19, 20, 21, 22), whereby the ultrasound generator(s) (19, 20, 21, 22) contact(s) the stencil carrier (8).
  4. Device according to Claim 3, characterised in that the ultrasound apparatus (18) is arranged on a lifting device.
  5. Device according to Claim 3 or 4, characterised in that the ultrasound apparatus (18) is arranged on a carrier (15) which is movable in a horizontal plane.
  6. Device according to Claim 5, characterised in that the carrier is designed as carrier bridge (15), movably guided on both sides in the edge region of the liquid bath (2).
  7. Device according to Claim 5 or 6, characterised in that the carrier (15) is movable in one direction and the ultrasound apparatus (18) is movable transverse to it, relative to the carrier (15).
  8. Device according to one of the claims 3 to 7, characterised in that the ultrasound apparatus (18) has a plurality of ultrasound generators (19, 20, 21, 22).
  9. Device according to one of the claims 3 to 8, characterised in that the liquid bath (2) has an outflow (10, 11) with a filter device (12).
EP98114323A 1997-07-31 1998-07-30 Method and device for removing stencil coatings on screen printing forms Expired - Lifetime EP0903230B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19733185 1997-07-31
DE19733185 1997-07-31
DE19747026 1997-10-24
DE19747026 1997-10-24

Publications (3)

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EP0903230A2 EP0903230A2 (en) 1999-03-24
EP0903230A3 EP0903230A3 (en) 1999-10-27
EP0903230B1 true EP0903230B1 (en) 2002-02-06

Family

ID=26038759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114323A Expired - Lifetime EP0903230B1 (en) 1997-07-31 1998-07-30 Method and device for removing stencil coatings on screen printing forms

Country Status (6)

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EP (1) EP0903230B1 (en)
AT (1) ATE212911T1 (en)
DE (1) DE59803003D1 (en)
DK (1) DK0903230T3 (en)
ES (1) ES2172842T3 (en)
PT (1) PT903230E (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213647B4 (en) * 2002-03-27 2004-08-26 Hermann Leufgens Process for cleaning a blanket washing device and cleaning trough to carry out the process
ITBO20100549A1 (en) * 2010-09-10 2012-03-11 Eugenio Curtarello METHOD OF ELIMINATION OF EMULSIONS AND RESIDUAL IMAGES FROM SERIGRAPHIC PRINTING MATRIX
GB2525033A (en) * 2014-04-10 2015-10-14 Asm Assembly Systems Switzerland Gmbh Screen printing apparatus and method
CN103990607A (en) * 2014-05-30 2014-08-20 苏州倍辰莱电子科技有限公司 Steel mesh washing device

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH04351592A (en) * 1991-05-29 1992-12-07 Masu Shoji:Kk Washer for mask

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Publication number Priority date Publication date Assignee Title
CH426896A (en) * 1963-11-13 1966-12-31 Ernst Greminger Konstruktionsw Process for cleaning and drying printed forms and equipment for carrying out the process
GB1580658A (en) * 1977-07-18 1980-12-03 Whiteley Ltd E Gordon Cleaning apparatus
DE3212916A1 (en) * 1982-04-06 1983-10-13 Markku 02170 Espoo Hakala Method and apparatus for cleaning silk cloths used in silk-screen printing
FR2630665B1 (en) * 1988-04-28 1990-08-03 Philippe Ets Pierre DEVICE FOR TREATMENT BY IMMERSION IN A BATH OF A TUBULAR OBJECT HAVING A FRAGILE OUTER SURFACE
JPH05220460A (en) * 1991-10-17 1993-08-31 Sawaa Corp:Kk Method and apparatus for ultrasonic cleaning
JP2879505B2 (en) * 1993-03-04 1999-04-05 シャープ株式会社 Screen plate cleaning device

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH04351592A (en) * 1991-05-29 1992-12-07 Masu Shoji:Kk Washer for mask

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 212 (M - 1402) 26 April 1993 (1993-04-26) *
Übersetzung der JP-A-4351592 in die deutsche Sprache *

Also Published As

Publication number Publication date
ATE212911T1 (en) 2002-02-15
DK0903230T3 (en) 2002-07-01
ES2172842T3 (en) 2002-10-01
EP0903230A2 (en) 1999-03-24
PT903230E (en) 2002-07-31
EP0903230A3 (en) 1999-10-27
DE59803003D1 (en) 2002-03-21

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