EP1759846B1 - Cleaning device having a nozzle consisting of soft-elastic material - Google Patents

Cleaning device having a nozzle consisting of soft-elastic material Download PDF

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Publication number
EP1759846B1
EP1759846B1 EP05017362A EP05017362A EP1759846B1 EP 1759846 B1 EP1759846 B1 EP 1759846B1 EP 05017362 A EP05017362 A EP 05017362A EP 05017362 A EP05017362 A EP 05017362A EP 1759846 B1 EP1759846 B1 EP 1759846B1
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EP
European Patent Office
Prior art keywords
nozzle
spray nozzle
cleaning device
jet
spray
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 - Fee Related
Application number
EP05017362A
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German (de)
French (fr)
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EP1759846A1 (en
Inventor
Kjell E. Dipl.-Ing. Lundin
Rune G. Dipl.-Ing. Vestman
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Baldwin Oxy Dry GmbH
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Baldwin Oxy Dry GmbH
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Publication date
Application filed by Baldwin Oxy Dry GmbH filed Critical Baldwin Oxy Dry GmbH
Priority to EP05017362A priority Critical patent/EP1759846B1/en
Priority to DE502005003481T priority patent/DE502005003481D1/en
Priority to US11/463,441 priority patent/US7644659B2/en
Priority to CNA2006101447198A priority patent/CN1931579A/en
Publication of EP1759846A1 publication Critical patent/EP1759846A1/en
Application granted granted Critical
Publication of EP1759846B1 publication Critical patent/EP1759846B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/267—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being deflected in determined directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices

Definitions

  • the invention relates to a cleaning device for cylinder surfaces of a printing press according to the preamble of patent claim 1.
  • Known cleaning devices are usually provided with a spray pipe, which serves as a distribution line and having a plurality of uniformly distributed over its length nozzle openings. With this spray pipe, the washing liquids are then applied to the cleaning element of the cleaning device, for. B a brush ( EP 1 106 355 A1 ) applied.
  • a spray tube with nozzle openings is not optimal.
  • a more or less directed liquid jet usually emerges from the nozzle openings, with the result that the local distribution of the washing liquid varies in the axial direction over the spray openings. Therefore, brush rollers, for example, onto which the washing liquids are sprayed, must be provided with an axially oscillating movement and a corresponding adjusting drive for uniform axial washing liquid distribution.
  • An effective measure for achieving the spatially uniform distribution of the washing liquid is the use of spray nozzles which have a baffle surface arranged downstream of the nozzle opening for deflecting and fanning the liquid jet emerging from the nozzle opening.
  • This principle is known from other applications, for example pesticide application in agriculture.
  • it has been hardly used in the present field of cleaning devices for printing machines, since corresponding spray nozzles require installation space, which is usually not present in such cleaning devices.
  • the problem remains that the nozzle opening must not be too small so that it does not become clogged with residues.
  • too large a nozzle opening prevents, as already described, the desired uniform time distribution of the washing liquid order, since too much washing liquid per unit of time can flow through.
  • a cleaning device for printing cylinder with a brush roller and a spray tube wherein the spray tube or in particular its spray openings made of soft elastic material, so that expand the spray holes in pressure pulses.
  • the US-A-5,813,087 shows a spray nozzle with a nozzle opening, a baffle for deflecting and fanning a leaking from the nozzle opening liquid jet and a Einsteckfuß for a hose for mobile use as a hand tool for a water jet vacuum cleaner.
  • the present invention is therefore based on the object, a cleaning device of the type mentioned for cylinder surfaces of a Optimize printing machine in that a better spatial and temporal equal distribution of the washing liquid order is possible.
  • the spray nozzle with its nozzle opening with its arranged before the nozzle opening baffle for deflecting and fanning out of the nozzle opening fluid jet, with its foot for insertion into a distributor line for washing liquids and their channel, on the one hand in a foot opening and on the other opens in the nozzle opening, made of soft elastic material, in particular plastic or rubber.
  • the nozzle opening can be made very small in order to dose the washing liquid jet more accurate and to make the temporal distribution of the washing liquid order more uniform. Because the channel with the nozzle opening is surrounded by resilient material, which does not behave rigidly, especially in an operation with pressure pulses, but expands to a small extent and contracts again, so that the risk of clogging of the nozzle opening by residues from the washing liquids only very small is.
  • the soft elastic design of the spray nozzle allows easy interchangeability of the same by attaching it to the distribution line by utilizing its elasticity, for example by pushing it into a corresponding opening. If the spray nozzle is formed correspondingly small, even a retrofitting of conventional spray pipes is possible.
  • Such attachment to the manifold by utilizing the elastic properties of the spray nozzle can be greatly assisted by providing the base of the spray nozzle with a bead for engaging an opening in the manifold. Once this bead is pushed through the opening in the manifold, it also holds the spray nozzle against high pressures in the opening.
  • Another advantage of the spray nozzle according to the invention is its cost-effective manufacturability, which should be mentioned first of all as a plastic part by injection molding.
  • the invention thus provides a novel spray nozzle which may have a very small nozzle opening, without the risk of clogging with residues from the washing liquids to increase significantly. Even if the nozzle orifice becomes clogged, this is not a serious problem because the spray nozzle of the present invention can be replaced with a new one very easily, in seconds and without the use of a tool.
  • the attachment of the spray nozzle according to the invention to the distribution line is simplified when the spray nozzle has a surface adapted to the outer surface of the distribution line, resting on this foot surface. At the same time, this results in an automatic correct alignment of the nozzle opening and the baffle surface; a slanted installation of the spray nozzle is prevented by the foot surface. This inherent anti-skew safeguard is further enhanced when the spray nozzle is constructed so that the nozzle orifice is integrated into the footwell.
  • the unavoidable spray formation during spraying of washing liquids can be reduced if a jet guidance surface extends from the nozzle opening to the impact surface, so that the liquid jet can flow along a curved surface.
  • the liquid jet then does not strike the impact surface head-on, but is continuously deflected and fanned out.
  • the baffle is provided on its side facing away from the nozzle opening side with a tear-off edge to ensure a defined shaping and movement direction of the fanned-out liquid jet.
  • the length L of the baffle which is defined by the position of the trailing edge, of course, has an influence on the degree of fanning of the liquid jet and on its speed. Accordingly, the spray nozzle according to the invention can be optimized by optimal choice of the position of the spoiler edge for the particular application. If the length L is chosen small, the liquid jet is braked less, but at the same time less fanned. If L is chosen to be large, the liquid jet is broadened, but at the same time the distance during which the liquid jet along the baffle surface is decelerated increases, so that the speed of the liquid jet is significantly reduced.
  • the spray nozzle according to the invention can be provided with a protective surface which projects back behind the tear-off edge.
  • FIG. 1 illustrated spray nozzle has a foot 1 with a bead 2 for engaging behind an opening of a (not shown) distribution line and with a foot opening 3, wherein a nozzle opening 4 is not directly visible here integrated in one of the surface of a cylindrical distribution line foot surface 5.
  • a baffle 6 is arranged for deflecting and fanning a liquid jet emerging from the nozzle opening 4. This baffle 6 is limited by a tear-off edge 7. Behind the tear-off edge 7 a recessed arranged protective surface 8 is provided to reduce, inter alia, the formation of spray.
  • the completely soft elastic material, here injection-molded plastic, existing spray nozzle is designed so that the foot surface 5, the baffle 6 and the protective surface 8 together forming a spray nozzle body 9, by means of which the spray nozzle (whose dimensions are in the 10-millimeter range ) and, if necessary, can be pressed into the opening of a distribution line provided for this purpose, if necessary by hand.
  • the foot surface 5 is provided with two grooves 10 to increase their mobility and to ensure a better nestling against the cylindrical surface of the manifold.
  • FIG. 2 which correspond to a sectional view FIG. 1 is the course of a channel 11 between the foot opening 3 and the nozzle opening 4 is visible.
  • the channel 11 is formed in the soft elastic material of the spray nozzle, so that the environment gives way elastically especially when pressure pulses occur and contracts again, so that the channel wall during operation of the spray nozzle, especially when working with pulsed liquid jets, is constantly in motion. As a result, clogging of the channel 11 and in particular the nozzle opening 4 is prevented by residues.
  • FIG. 2 is also clearly seen that the nozzle opening 4 is arranged in the center of a curved beam guide surface 12, so that the liquid jet, which flows through the channel 11 and exiting the nozzle opening 4, flows along the beam guide surface 12, gradually deflected by this and on the Baffle 6 is passed.
  • the turbulence and atomization of the liquid is reduced and the beam guidance is defined, as if the liquid jet without deflection by the beam guide surface 12 would impinge on the baffle 6.
  • the length L of the baffle 6 to the trailing edge 7, as described above significantly responsible for the speed with which the liquid jet leaves the trailing edge 7, as it is braked more or less depending on the length L, as well as the degree of fanning of liquid jet.
  • the region of the tear-off edge 7 is shielded by the protective surface 8 against external interference.
  • FIG. 3 shows a fanned-out liquid jet 13 which leaves the tear-off edge 7 of the present spray nozzle defined. Otherwise, the components of the spray nozzle with the same reference numerals as in Figures 1 and 2 provided, so that reference may be made to the description of these two figures, moreover.

Landscapes

  • Nozzles (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft eine Reinigungsvorrichtung für Zylinderoberflächen einer Druckmaschine nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a cleaning device for cylinder surfaces of a printing press according to the preamble of patent claim 1.

Zur Führung, zur Bearbeitung und zum Antrieb von Bedruckstoffbögen oder Bedruckstoffbahnen in Druckmaschinen ist ein intensiver Kontakt zwischen dem Bedruckstoff und den Zylindern einer Druckmaschine notwendig. Dadurch entstehen, beispielsweise wenn als Bedruckstoff Papier verwendet wird, an den Zylindern Ablagerungen von Papierstaub (Fasern, Strich, Füllstoffe), Druckfarbe und gegebenenfalls Puderbestäubung. Diese Ablagerungen beeinträchtigen die Zylinder in ihrer Funktionsfähigkeit. Für die Druckqualität und auch die Betriebssicherheit ist es unerlässlich, die Druckmaschinen-Zylinder regelmäßig von Verunreinigungen zu befreien.For the guidance, for processing and for the drive of printing material sheets or printing material webs in printing machines, an intensive contact between the printing substrate and the cylinders of a printing machine is necessary. As a result, for example, when paper is used as printing material, deposits of paper dust (fibers, coating, fillers), printing ink and optionally powder dusting on the cylinders. These deposits affect the cylinders in their functionality. For print quality and operational reliability, it is essential to regularly clean the press cylinders of impurities.

Dies geschieht in der Regel mittels automatisierten Reinigungsvorrichtungen, die Waschflüssigkeiten auf die zu reinigenden Zylinderoberflächen aufbringen und gegebenenfalls Bürsten oder Tücher einsetzen, um die durch die Waschflüssigkeiten angelösten Verunreinigungen von der Zylinderoberfläche abzuheben. Ein Beispiel für eine solche Reinigungsvorrichtung ist in der EP 1 106 355 A1 beschrieben.This is usually done by means of automated cleaning devices that apply washing liquids to the cylinder surfaces to be cleaned and optionally use brushes or cloths to lift the dissolved by the washing liquids contaminants from the cylinder surface. An example of such a cleaning device is in EP 1 106 355 A1 described.

Beim Druck mit Papierbahnen muss die regelmäßig notwendige Reinigung der Zylinderoberflächen der Druckmaschine zur Vermeidung von erheblichen Produktionsstillständen unter Produktionsbedingungen gereinigt werden, d. h. während des Reinigungsvorgangs läuft die Papierbahn weiter durch die Druckmaschine, wobei Makulatur entsteht. Um die Zeiten für die Reinigung der Zylinderoberflächen möglichst kurz zu halten, wird üblicherweise bei Produktionsgeschwindigkeit gereinigt, wobei zwischen 5 und 25 Makulaturexemplare pro Sekunde produziert werden. Unter Kostenaspekten ist es daher unerlässlich, den Auftrag von Waschflüssigkeiten mit größtmöglicher Effizienz vorzunehmen und insbesondere auch für eine möglichst gleichmäßige räumliche und zeitliche Verteilung des Waschflüssigkeitenauftrags zu sorgen.When printing with paper webs, the regularly required cleaning of the cylinder surfaces of the printing press must be cleaned under production conditions in order to avoid considerable production stoppages. H. During the cleaning process, the paper web continues to pass through the printing press, resulting in waste. To keep the times for cleaning the cylinder surfaces as short as possible, is usually cleaned at production speed, with between 5 and 25 copies per second are produced. From a cost point of view it is therefore essential to carry out the application of washing liquids with the greatest possible efficiency and, in particular, to ensure as even as possible a spatial and temporal distribution of the washing liquid application.

Bekannte Reinigungsvorrichtungen sind in der Regel mit einem Sprührohr versehen, welches als Verteilerleitung dient und eine Mehrzahl von über dessen Länge gleichmäßig verteilten Düsenöffnungen aufweist. Mit diesem Sprührohr werden die Waschflüssigkeiten dann auf das Reinigungselement der Reinigungsvorrichtung, z. B eine Bürste ( EP 1 106 355 A1 ) aufgetragen.Known cleaning devices are usually provided with a spray pipe, which serves as a distribution line and having a plurality of uniformly distributed over its length nozzle openings. With this spray pipe, the washing liquids are then applied to the cleaning element of the cleaning device, for. B a brush ( EP 1 106 355 A1 ) applied.

Hinsichtlich der erwünschten gleichmäßigen räumlichen und zeitlichen Verteilung des Waschflüssigkeitenauftrags ist ein Sprührohr mit Düsenöffnungen allerdings nicht optimal. Aus den Düsenöffnungen tritt in der Regel ein mehr oder weniger gerichteter Flüssigkeitsstrahl aus, so dass die örtliche Verteilung der Waschflüssigkeit über die Sprühöffnungen hinweg in axialer Richtung variiert. Deshalb müssen beispielsweise Bürstenwalzen, auf die die Waschflüssigkeiten aufgesprüht werden, mit einer axial oszillierenden Bewegung und einem entsprechenden Verstellantrieb zur gleichmäßigen axialen Waschflüssigkeits-Verteilung versehen werden.However, with regard to the desired uniform spatial and temporal distribution of the washing liquid application, a spray tube with nozzle openings is not optimal. A more or less directed liquid jet usually emerges from the nozzle openings, with the result that the local distribution of the washing liquid varies in the axial direction over the spray openings. Therefore, brush rollers, for example, onto which the washing liquids are sprayed, must be provided with an axially oscillating movement and a corresponding adjusting drive for uniform axial washing liquid distribution.

Verschärft besteht die oben beschriebene Problematik der notwendigen räumlichen und zeitlichen Gleichverteilung bei Heat-Set-Druckmaschinen, die mit einem Trockner versehen sind, durch welchen der Bedruckstoff nach dem Bedrucken geführt wird. Denn bei einer Reinigung der Zylinderoberflächen unter Produktionsbedingungen transportiert der Bedruckstoff beim Reinigungsvorgang Waschflüssigkeiten in den Trockner. Die üblicherweise verwendeten Waschflüssigkeiten haben einen relativ hohen Anteil von flüchtigen Kohlenwasserstoffen, die im Trockner unter Hitzeeinwirkung gelangen und unter ungünstigen Umständen beim Abdampfen eine zündfähige Konzentration erreichen könnten. Hier ist es also essentiell, dass beim Reinigungsvorgang nicht zu viel Waschflüssigkeit verwendet wird. Gleichwohl soll eine optimale Reinigungswirkung bei möglichst kurzer Reinigungsdauer erzielt werden. Umso wichtiger ist es, die Waschflüssigkeit mit größtmöglicher Effizienz aufzubringen, was insbesondere bedeutet, die räumliche und zeitliche Verteilung des Waschflüssigkeitsauftrags so gleichmäßig wie möglich zu gestalten.Stricter is the problem described above of the necessary spatial and temporal equal distribution in heat-set printing machines, which are provided with a dryer, through which the substrate is passed after printing. Because when cleaning the cylinder surfaces under production conditions, the substrate transports washing liquids into the dryer during the cleaning process. The commonly used washing liquids have a relatively high proportion of volatile hydrocarbons, which could be exposed to heat in the dryer and, under unfavorable conditions, could reach an ignitable concentration during evaporation. Here it is therefore essential that the cleaning process does not use too much washing liquid. Nevertheless, an optimal cleaning effect should be achieved with the shortest possible cleaning time. It is therefore all the more important to apply the washing liquid with the greatest possible efficiency, which means in particular to make the spatial and temporal distribution of the washing liquid application as uniform as possible.

Eine wirkungsvolle Maßnahme, um die räumliche Gleichverteilung der Waschflüssigkeit zu erreichen, ist die Verwendung von Sprühdüsen, die eine stromabwärts der Düsenöffnung angeordnete Prallfläche zum Ablenken und Auffächern des aus.der Düsenöffnung austretenden Flüssigkeitsstrahls aufweisen. Dieses Prinzip ist aus anderen Anwendungen, beispielsweise beim Pestizidauftrag in der Landwirtschaft bekannt. Es wurde gleichwohl auf dem vorliegenden Gebiet der Reinigungsvorrichtungen für Druckmaschinen bislang kaum eingesetzt, da entsprechende Sprühdüsen einen Einbauraum benötigen, der üblicherweise bei solchen Reinigungsvorrichtungen nicht vorhanden ist. Ferner bleibt auch bei Sprühdüsen dieser Art das Problem bestehen, dass die Düsenöffnung nicht zu klein gewählt werden darf, damit sie sich nicht mit Rückständen zusetzt. Eine zu große Düsenöffnung verhindert jedoch, wie bereits beschrieben, die erwünschte gleichmäßige zeitliche Verteilung des Waschflüssigkeitsauftrags, da zuviel Waschflüssigkeit pro Zeiteinheit durchfließen kann.An effective measure for achieving the spatially uniform distribution of the washing liquid is the use of spray nozzles which have a baffle surface arranged downstream of the nozzle opening for deflecting and fanning the liquid jet emerging from the nozzle opening. This principle is known from other applications, for example pesticide application in agriculture. However, it has been hardly used in the present field of cleaning devices for printing machines, since corresponding spray nozzles require installation space, which is usually not present in such cleaning devices. Furthermore, even with spray nozzles of this type, the problem remains that the nozzle opening must not be too small so that it does not become clogged with residues. However, too large a nozzle opening prevents, as already described, the desired uniform time distribution of the washing liquid order, since too much washing liquid per unit of time can flow through.

In der DE-U-296 12 400 ist eine Reinigungsvorrichtung für Druckzylinder mit einer Bürstenwalze und einem Sprührohr beschrieben, wobei das Sprührohr bzw. insbesondere dessen Sprühöffnungen aus weichelastischem Material bestehen, so dass sich die Sprühöffnungen bei Druckpulsen erweitern. Die US-A-5 813 087 zeigt eine Sprühdüse mit einer Düsenöffnung, einer Prallfläche zum Ablenken und Auffächern eines aus der Düsenöffnung austretenden Flüssigkeitsstrahls und einem Einsteckfuß für eine Schlauchleitung zum mobilen Einsatz als Handwerkzeug für einen Wasserstrahl-Schmutzsauger.In the DE-U-296 12 400 a cleaning device for printing cylinder with a brush roller and a spray tube is described, wherein the spray tube or in particular its spray openings made of soft elastic material, so that expand the spray holes in pressure pulses. The US-A-5,813,087 shows a spray nozzle with a nozzle opening, a baffle for deflecting and fanning a leaking from the nozzle opening liquid jet and a Einsteckfuß for a hose for mobile use as a hand tool for a water jet vacuum cleaner.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Reinigungsvorrichtung der eingangs genannten Art für Zylinderoberflächen einer Druckmaschine insofern zu optimieren, dass eine bessere räumliche und zeitliche Gleichverteilung des Waschflüssigkeitsauftrags möglich ist.The present invention is therefore based on the object, a cleaning device of the type mentioned for cylinder surfaces of a Optimize printing machine in that a better spatial and temporal equal distribution of the washing liquid order is possible.

Gelöst ist diese Aufgabe durch eine Reinigungsvorrichtung mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Reinigungsvorrichtung finden sich in den Patentansprüchen 2 bis 8.This object is achieved by a cleaning device with the features of claim 1. Advantageous embodiments and further developments of the cleaning device according to the invention can be found in the claims 2 to 8.

Nach der vorliegenden Erfindung ist die Sprühdüse mit ihrer Düsenöffnung, mit ihrer vor der Düsenöffnung angeordneten Prallfläche zum Ablenken und Auffächern des aus der Düsenöffnung austretenden Flüssigkeitsstrahls, mit ihrem Fuß zum Einsetzen in eine Verteilerleitung für Waschflüssigkeiten und ihrem Kanal, der einerseits in einer Fußöffnung und andererseits in der Düsenöffnung mündet, aus weichelastischem Material, insbesondere Kunststoff oder Gummi gefertigt. Hierdurch ergeben sich mehrere entscheidende Vorteile:According to the present invention, the spray nozzle with its nozzle opening, with its arranged before the nozzle opening baffle for deflecting and fanning out of the nozzle opening fluid jet, with its foot for insertion into a distributor line for washing liquids and their channel, on the one hand in a foot opening and on the other opens in the nozzle opening, made of soft elastic material, in particular plastic or rubber. This results in several decisive advantages:

Durch die weichelastische Ausbildung der Sprühdüse kann die Düsenöffnung sehr klein gewählt werden, um den Waschflüssigkeitsstrahl genauer dosieren und die zeitliche Verteilung des Waschflüssigkeitsauftrags gleichmäßiger gestalten zu können. Denn der Kanal mit der Düsenöffnung ist von nachgiebigem Material umgeben, das sich insbesondere bei einem Betrieb mit Druckpulsen nicht starr verhält, sondern sich im geringen Maße ausdehnt und wieder zusammenzieht, so dass die Gefahr eines Zusetzens der Düsenöffnung durch Rückstände aus den Waschflüssigkeiten nur sehr gering ist.Due to the soft elastic design of the spray nozzle, the nozzle opening can be made very small in order to dose the washing liquid jet more accurate and to make the temporal distribution of the washing liquid order more uniform. Because the channel with the nozzle opening is surrounded by resilient material, which does not behave rigidly, especially in an operation with pressure pulses, but expands to a small extent and contracts again, so that the risk of clogging of the nozzle opening by residues from the washing liquids only very small is.

Ferner ermöglicht die weichelastische Ausbildung der Sprühdüse eine leichte Austauschbarkeit derselben, indem sie unter Ausnutzung ihrer Elastizität an der Verteilerleitung angebracht wird, beispielsweise durch Hineindrücken in eine entsprechende Öffnung. Wenn die Sprühdüse entsprechend klein ausgeformt wird, ist sogar ein Nachrüsten von herkömmlichen Sprührohren möglich. Ein derartiges Anbringen an der Verteilerleitung unter Ausnutzung der elastischen Eigenschaften der Sprühdüse kann dadurch erheblich unterstützt werden, dass der Fuß der Sprühdüse mit einem Wulst zum Hintergreifen einer Öffnung in der Verteilerleitung versehen wird. Wenn dieser Wulst durch die Öffnung in der Verteilerleitung einmal hindurchgedrückt ist, hält er die Sprühdüse auch gegen hohe anstehende Drücke in der Öffnung.Furthermore, the soft elastic design of the spray nozzle allows easy interchangeability of the same by attaching it to the distribution line by utilizing its elasticity, for example by pushing it into a corresponding opening. If the spray nozzle is formed correspondingly small, even a retrofitting of conventional spray pipes is possible. Such attachment to the manifold by utilizing the elastic properties of the spray nozzle can be greatly assisted by providing the base of the spray nozzle with a bead for engaging an opening in the manifold. Once this bead is pushed through the opening in the manifold, it also holds the spray nozzle against high pressures in the opening.

Ein weiterer Vorteil der erfindungsgemäßen Sprühdüse besteht in ihrer kostengünstigen Herstellbarkeit, wobei zuallererst eine Herstellung als Kunststoffteil im Spritzgussverfahren zu nennen wäre.Another advantage of the spray nozzle according to the invention is its cost-effective manufacturability, which should be mentioned first of all as a plastic part by injection molding.

Die Erfindung stellt also eine neuartige Sprühdüse zur Verfügung, die eine sehr kleine Düsenöffnung aufweisen kann, ohne dadurch die Gefahr eines Zusetzens mit Rückständen aus den Waschflüssigkeiten nennenswert zu erhöhen. Selbst wenn die Düsenöffnung sich zusetzt, ist dies kein ernstes Problem, da die erfindungsgemäße Sprühdüse sehr leicht, in Sekunden und ohne Werkzeugeinsatz, gegen eine neue ausgetauscht werden kann.The invention thus provides a novel spray nozzle which may have a very small nozzle opening, without the risk of clogging with residues from the washing liquids to increase significantly. Even if the nozzle orifice becomes clogged, this is not a serious problem because the spray nozzle of the present invention can be replaced with a new one very easily, in seconds and without the use of a tool.

Das Anbringen der erfindungsgemäßen Sprühdüse an der Verteilerleitung wird vereinfacht, wenn die Sprühdüse eine der Außenfläche der Verteilerleitung angepasste, auf dieser aufliegende Fußfläche aufweist. Gleichzeitig ergibt sich hierdurch eine automatische korrekte Ausrichtung der Düsenöffnung und der Prallfläche; ein schiefer Einbau der Sprühdüse wird durch die Fußfläche verhindert. Diese immanente Sicherung gegen schiefes Einbauen wird noch verbessert, wenn die Sprühdüse so konstruiert ist, dass die Düsenöffnung in die Fußfläche integriert ist.The attachment of the spray nozzle according to the invention to the distribution line is simplified when the spray nozzle has a surface adapted to the outer surface of the distribution line, resting on this foot surface. At the same time, this results in an automatic correct alignment of the nozzle opening and the baffle surface; a slanted installation of the spray nozzle is prevented by the foot surface. This inherent anti-skew safeguard is further enhanced when the spray nozzle is constructed so that the nozzle orifice is integrated into the footwell.

Die unvermeidliche Sprühnebelbildung beim Sprühen von Waschflüssigkeiten kann bei der erfindungsgemäßen Sprühdüse vermindert werden, wenn sich eine Strahlführungsfläche von der Düsenöffnung zur Prallfläche erstreckt, so dass der Flüssigkeitsstrahl entlang einer gekrümmten Fläche fließen kann. Der Flüssigkeitsstrahl trifft dann nicht frontal auf die Prallfläche auf, sondern wird kontinuierlich umgelenkt und hierbei aufgefächert.In the case of the spray nozzle according to the invention, the unavoidable spray formation during spraying of washing liquids can be reduced if a jet guidance surface extends from the nozzle opening to the impact surface, so that the liquid jet can flow along a curved surface. The liquid jet then does not strike the impact surface head-on, but is continuously deflected and fanned out.

Zweckmäßigerweise ist die Prallfläche an ihrer von der Düsenöffnung abgewandten Seite mit einer Abrisskante versehen, um eine definierte Formung und Bewegungsrichtung des aufgefächerten Flüssigkeitsstrahles zu gewährleisten. Die Länge L der Prallfläche, die durch die Lage der Abrisskante definiert wird, hat naturgemäß Einfluss auf den Grad der Auffächerung des Flüssigkeitsstrahls sowie auf dessen Geschwindigkeit. Dementsprechend kann die erfindungsgemäße Sprühdüse durch optimale Wahl der Lage der Abrisskante für den jeweiligen Einsatzzweck optimiert werden. Wird die Länge L klein gewählt, wird der Flüssigkeitsstrahl weniger abgebremst, jedoch gleichzeitig auch weniger aufgefächert. Wird L groß gewählt, erfolgt eine breitere Auffächerung des Flüssigkeitsstrahls, wobei jedoch gleichzeitig die Strecke, während der der Flüssigkeitsstrahl entlang der Prallfläche abgebremst wird, größer wird, so dass die Geschwindigkeit des Flüssigkeitsstrahls deutlich vermindert wird.Conveniently, the baffle is provided on its side facing away from the nozzle opening side with a tear-off edge to ensure a defined shaping and movement direction of the fanned-out liquid jet. The length L of the baffle, which is defined by the position of the trailing edge, of course, has an influence on the degree of fanning of the liquid jet and on its speed. Accordingly, the spray nozzle according to the invention can be optimized by optimal choice of the position of the spoiler edge for the particular application. If the length L is chosen small, the liquid jet is braked less, but at the same time less fanned. If L is chosen to be large, the liquid jet is broadened, but at the same time the distance during which the liquid jet along the baffle surface is decelerated increases, so that the speed of the liquid jet is significantly reduced.

Schließlich kann die erfindungsgemäße Sprühdüse mit einer hinter der Abrisskante zurückspringend angeordneten Schutzfläche versehen sein.Finally, the spray nozzle according to the invention can be provided with a protective surface which projects back behind the tear-off edge.

Ein Ausführungsbeispiel für eine Sprühdüse nach der vorliegenden Erfindung ist im Folgenden anhand der beigefügten Zeichnungen näher beschrieben und erläutert. Es zeigen:

Figur 1:
eine perspektivische Ansicht des Auführungsbeispiels einer Sprühdüse;
Figur 2:
dieselbe Ansicht der Sprühdüse, jedoch in einer Schnittdarstellung;
Figur 3:
eine weitere perspektivische Ansicht der Sprühdüse, mit Flüssigkeitsstrahl.
An embodiment of a spray nozzle according to the present invention is described and explained in more detail below with reference to the accompanying drawings. Show it:
FIG. 1:
a perspective view of the Auführungsbeispiels a spray nozzle;
FIG. 2:
the same view of the spray nozzle, but in a sectional view;
FIG. 3:
another perspective view of the spray nozzle, with liquid jet.

Die in Figur 1 dargestellte Sprühdüse weist einen Fuß 1 mit einem Wulst 2 zum Hintergreifen einer Öffnung einer (nicht dargestellten) Verteilerleitung und mit einer Fußöffnung 3 auf, wobei eine Düsenöffnung 4 hier nicht direkt sichtbar in einer der Oberfläche einer zylindrischen Verteilerleitung angepassten Fußfläche 5 integriert ist. Vor der Düsenöffnung 4 ist eine Prallfläche 6 zum Ablenken und Auffächern eines aus der Düsenöffnung 4 austretenden Flüssigkeitsstrahls angeordnet. Diese Prallfläche 6 ist durch eine Abrisskante 7 begrenzt. Hinter der Abrisskante 7 ist eine zurückspringend angeordnete Schutzfläche 8 vorgesehen, um unter anderem die Sprühnebelbildung zu vermindern.In the FIG. 1 illustrated spray nozzle has a foot 1 with a bead 2 for engaging behind an opening of a (not shown) distribution line and with a foot opening 3, wherein a nozzle opening 4 is not directly visible here integrated in one of the surface of a cylindrical distribution line foot surface 5. In front of the nozzle opening 4, a baffle 6 is arranged for deflecting and fanning a liquid jet emerging from the nozzle opening 4. This baffle 6 is limited by a tear-off edge 7. Behind the tear-off edge 7 a recessed arranged protective surface 8 is provided to reduce, inter alia, the formation of spray.

Die ganz aus weichelastischem Material, hier spritzgegossenem Kunststoff, bestehende Sprühdüse ist so ausgestaltet, dass die Fußfläche 5, die Prallfläche 6 und die Schutzfläche 8 sich gemeinsam erweiternd einen Sprühdüsenkörper 9 bilden, vermittels dessen die Sprühdüse (deren Abmessungen im 10-Milimeter-Bereich liegen) besser fassen und gegebenenfalls in die dafür vorgesehene Öffnung einer Verteilerleitung gegebenenfalls von Hand hineingedrückt werden kann.The completely soft elastic material, here injection-molded plastic, existing spray nozzle is designed so that the foot surface 5, the baffle 6 and the protective surface 8 together forming a spray nozzle body 9, by means of which the spray nozzle (whose dimensions are in the 10-millimeter range ) and, if necessary, can be pressed into the opening of a distribution line provided for this purpose, if necessary by hand.

Die Fußfläche 5 ist mit zwei Nuten 10 versehen, um ihre Beweglichkeit zu erhöhen und ein besseres Anschmiegen an die zylindrische Oberfläche der Verteilerleitung zu gewährleisten.The foot surface 5 is provided with two grooves 10 to increase their mobility and to ensure a better nestling against the cylindrical surface of the manifold.

In Figur 2, die eine Schnittdarstellung entsprechend Figur 1 ist, ist der Verlauf eines Kanals 11 zwischen der Fußöffnung 3 und der Düsenöffnung 4 sichtbar. Der Kanal 11 ist im weichelastischen Material der Sprühdüse gebildet, so dass dessen Umgebung insbesondere bei auftretenden Druckpulsen elastisch nachgibt und sich wieder zusammenzieht, so dass die Kanalwand während des Betriebs der Sprühdüse, insbesondere wenn mit gepulsten Flüssigkeitsstrahlen gearbeitet wird, ständig in Bewegung ist. Hierdurch wird ein Zusetzen des Kanals 11 und insbesondere der Düsenöffnung 4 durch Rückstände verhindert.In FIG. 2 which correspond to a sectional view FIG. 1 is the course of a channel 11 between the foot opening 3 and the nozzle opening 4 is visible. The channel 11 is formed in the soft elastic material of the spray nozzle, so that the environment gives way elastically especially when pressure pulses occur and contracts again, so that the channel wall during operation of the spray nozzle, especially when working with pulsed liquid jets, is constantly in motion. As a result, clogging of the channel 11 and in particular the nozzle opening 4 is prevented by residues.

In Figur 2 ist außerdem deutlich zu erkennen, dass die Düsenöffnung 4 im Zentrum einer gekrümmten Strahlführungsfläche 12 angeordnet ist, so dass der Flüssigkeitsstrahl, der durch den Kanal 11 strömt und aus der Düsenöffnung 4 austritt, entlang der Strahlführungsfläche 12 fließt, von dieser allmählich umgelenkt und auf die Prallfläche 6 geleitet wird. Hierdurch wird die Verwirbelung und Vernebelung der Flüssigkeit vermindert und die Strahlführung erfolgt definierter, als wenn der Flüssigkeitsstrahl ohne Umlenkung durch die Strahlführungsfläche 12 auf die Prallfläche 6 auftreffen würde. Die Länge L der Prallfläche 6 bis zur Abrisskante 7 ist, wie oben beschrieben, maßgeblich dafür verantwortlich, mit welcher Geschwindigkeit der Flüssigkeitsstrahl die Abrisskante 7 verlässt, da er abhängig von der Länge L mehr oder weniger abgebremst wird, sowie für den Grad der Auffächerung des Flüssigkeitsstrahls. Der Bereich der Abrisskante 7 wird durch die Schutzfläche 8 gegen äußere Störeinflüsse abgeschirmt.In FIG. 2 is also clearly seen that the nozzle opening 4 is arranged in the center of a curved beam guide surface 12, so that the liquid jet, which flows through the channel 11 and exiting the nozzle opening 4, flows along the beam guide surface 12, gradually deflected by this and on the Baffle 6 is passed. As a result, the turbulence and atomization of the liquid is reduced and the beam guidance is defined, as if the liquid jet without deflection by the beam guide surface 12 would impinge on the baffle 6. The length L of the baffle 6 to the trailing edge 7, as described above, significantly responsible for the speed with which the liquid jet leaves the trailing edge 7, as it is braked more or less depending on the length L, as well as the degree of fanning of liquid jet. The region of the tear-off edge 7 is shielded by the protective surface 8 against external interference.

Die Darstellung gemäß Figur 3 zeigt einen aufgefächerten Flüssigkeitsstrahl 13, der die Abrisskante 7 der vorliegenden Sprühdüse definiert verlässt. Ansonsten sind die Bauteile der Sprühdüse mit denselben Bezugszeichen wie in den Figuren 1 und 2 versehen, so dass im Übrigen auf die Beschreibung dieser beiden Figuren verwiesen werden kann.The representation according to FIG. 3 shows a fanned-out liquid jet 13 which leaves the tear-off edge 7 of the present spray nozzle defined. Otherwise, the components of the spray nozzle with the same reference numerals as in Figures 1 and 2 provided, so that reference may be made to the description of these two figures, moreover.

Claims (8)

  1. Cleaning device for cylinder surfaces of a printing machine, comprising
    - a spray nozzle with a nozzle orifice (4) for a jet of washing fluid (13),
    - a distributor line for washing fluids in which the spray nozzle is inserted, as well as
    - a cleaning element by which contaminants dissolved by the cleaning fluids can be lifted off from the cylinder surface,
    - the spray nozzle being made from flexible material,
    characterised in that
    - the spray nozzle is constructed as a separate component and is detachably inserted into the distributor line,
    - wherein the spray nozzle has a baffle surface (6) disposed downstream of the nozzle orifice (4) for deflecting and fanning out a jet (13) exiting the nozzle opening, as well as
    - a base (1) for insertion into the distributor line and
    - a channel (11) which opens on one side into a base opening (3) and on the other side into the nozzle orifice (4).
  2. Cleaning device as claimed in Claim 1, characterised in that the nozzle is produced as an injection moulded part made from plastics material.
  3. Cleaning device as claimed in any one of Claims 1 or 2, characterised in that the base (1) of the spray nozzle is provided with a bead (2) for engaging behind an opening in the distributor line.
  4. Cleaning device as claimed in any one of Claims 1 to 3, characterised in that the spray nozzle has a base surface (5) which is adapted to an outer surface of the distributor line and rests thereon.
  5. Cleaning device as claimed in Claim 4, characterised in that the nozzle orifice (4) is integrated into the base surface (5).
  6. Cleaning device as claimed in any one of Claims 1 to 5, characterised in that the baffle surface (6) of the spray nozzle is provided with a drop-off edge (7) for the fanned jet of fluid (13).
  7. Cleaning device as claimed in Claim 6, characterised in that a protective surface (8) is disposed set back in the jet direction behind the drop-off edge (7).
  8. Cleaning device as claimed in at least one of Claims 1 and 7, characterised in that in the spray nozzle a jet guiding surface (12) extends from the nozzle orifice (4) to the baffle surface (6).
EP05017362A 2005-08-10 2005-08-10 Cleaning device having a nozzle consisting of soft-elastic material Expired - Fee Related EP1759846B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05017362A EP1759846B1 (en) 2005-08-10 2005-08-10 Cleaning device having a nozzle consisting of soft-elastic material
DE502005003481T DE502005003481D1 (en) 2005-08-10 2005-08-10 Cleaning device with spray nozzle made of soft elastic material
US11/463,441 US7644659B2 (en) 2005-08-10 2006-08-09 Cleaning apparatus for cylinder surfaces of a printing machine and spray nozzle for such a cleaning apparatus
CNA2006101447198A CN1931579A (en) 2005-08-10 2006-08-10 Cleaning apparatus for cylinder surfaces of a printing machine and spray nozzle for such a cleaning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05017362A EP1759846B1 (en) 2005-08-10 2005-08-10 Cleaning device having a nozzle consisting of soft-elastic material

Publications (2)

Publication Number Publication Date
EP1759846A1 EP1759846A1 (en) 2007-03-07
EP1759846B1 true EP1759846B1 (en) 2008-03-26

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ID=35500675

Family Applications (1)

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EP05017362A Expired - Fee Related EP1759846B1 (en) 2005-08-10 2005-08-10 Cleaning device having a nozzle consisting of soft-elastic material

Country Status (4)

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US (1) US7644659B2 (en)
EP (1) EP1759846B1 (en)
CN (1) CN1931579A (en)
DE (1) DE502005003481D1 (en)

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CN102886981A (en) * 2012-10-15 2013-01-23 北京印刷学院 Spraying mechanism for rubber blanket cylinder cleaning device and nozzle of spraying mechanism
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Also Published As

Publication number Publication date
EP1759846A1 (en) 2007-03-07
US7644659B2 (en) 2010-01-12
US20070033764A1 (en) 2007-02-15
CN1931579A (en) 2007-03-21
DE502005003481D1 (en) 2008-05-08

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