EP0180541B1 - Procédé et dispositif de nettoyage d'une forme d'impression - Google Patents

Procédé et dispositif de nettoyage d'une forme d'impression Download PDF

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Publication number
EP0180541B1
EP0180541B1 EP85810469A EP85810469A EP0180541B1 EP 0180541 B1 EP0180541 B1 EP 0180541B1 EP 85810469 A EP85810469 A EP 85810469A EP 85810469 A EP85810469 A EP 85810469A EP 0180541 B1 EP0180541 B1 EP 0180541B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
pressure
printing
filter
pump
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
Application number
EP85810469A
Other languages
German (de)
English (en)
Other versions
EP0180541A1 (fr
Inventor
Hanspeter Schneebeli
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.)
H Schneebeli & Coag
Original Assignee
H Schneebeli & Coag
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 H Schneebeli & Coag filed Critical H Schneebeli & Coag
Priority to AT85810469T priority Critical patent/ATE47690T1/de
Publication of EP0180541A1 publication Critical patent/EP0180541A1/fr
Application granted granted Critical
Publication of EP0180541B1 publication Critical patent/EP0180541B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/001—Devices for cleaning parts removed from the printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/02—Cleaning arrangements or devices for forme cylinders
    • 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
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/31—Recovering used solvents or residues by filtering

Definitions

  • Printing forms e.g. B. printing cylinder
  • cleaned with solvents by spraying the printing form in a cleaning booth over a perforated tube with the solvent.
  • the ink residues on the printing form are at least partially dissolved in the solvent.
  • the dissolved color residues accumulate in the solvent, so that it has to be replaced relatively often.
  • the contaminated solvent is difficult to remove in an environmentally friendly manner. It is also very expensive to use the solvent in a closed circuit because the dissolved paint residues are difficult to chemically separate from the solvent.
  • contact with the solvent and its vapors endangers the operating personnel.
  • a device is known from FR-A 1 249140: A flat printing form is attached to a pivotable table and pivoted into a vertical position. To clean the printing form, you drive along a carriage with a rotating, roller-shaped brush and two rows of spray nozzles. First, a solvent is sprayed onto the printing form via the row of spray nozzles. With the help of the brush, the color residues are solved. The printing plate is then rinsed with fresh water through the second row of spray nozzles.
  • a method according to the preamble of claim 1 is known from FR-A 1 012 324.
  • a solvent is sprayed over a horizontal tube with a series of openings onto a dampening roller that is rotatably mounted and driven underneath. This removes the ink residues on the dampening roller and throws them off.
  • a device for cleaning screen printing screens is known.
  • the sieve to be cleaned is clamped on a frame in a chamber.
  • Below the sieve there are two pipes that can be rotated about their axis, each with a row of spray nozzles.
  • the screen is sprayed with a solvent through these nozzles.
  • the backflowing solvent is recycled through a filter and a pump.
  • the solvent vapors are extracted.
  • a similar device for cleaning screen printing screens with which water-soluble inks have been printed is known from US Pat. No. 3,656,493.
  • a slide is passed over the sieve in a two-dimensional pattern.
  • the slide carries a nozzle with which the screen is sprayed with a steam or water jet.
  • the feed pressure of the nozzle is significantly below 20 bar, otherwise the sieve would be torn apart.
  • This device is only suitable for screens that have water-soluble color residues.
  • FR-A 2 288 616 other solvents would have to be used for water-insoluble paints.
  • the invention has for its object to reduce the risk to the operating personnel from solvent vapors.
  • a cleaning cabin 1 in which a pressure cylinder 2 is cleaned with a high-pressure water jet.
  • the water 10 is drawn from a container 8 via a suction line 9 by a high-pressure pump 3 and fed to the nozzle in the cabin 1 via a high-pressure line 4 at a pressure between approximately 100 and 500 bar.
  • a drain line 5 is connected, which feeds the polluted water via a distributor screen 6 to a filter system 7.
  • the filter system 7 comprises an endless screen 21 stretched over two deflection rollers 22, 23, which carries a disposable paper filter belt 25.
  • One of the rollers 22, 23 is driven by a motor.
  • the filter belt 25 is drawn off from a supply roll 20, reaches the screen 21 via a deflection roller 24 and falls at the other end into a container 26.
  • the water cleaned by the filter system 7 drips back into the water container 8.
  • a return pump 16 is additionally arranged in the drain line 5, which returns the contaminated water to the distributor screen 6 via lines 17, 18.
  • Fig. 2 shows a section through the cleaning cabin 1, which has a trough-shaped lower part 1b and a closable cover 1a.
  • the pressure cylinder 2 carries the inner rings 30 of roller bearings on its journal 31.
  • the rings 30 are mounted on rollers 33, 35.
  • the roller 35 can be driven by a motor 37 via a shaft 36.
  • the cylinder 2 is rotated slowly.
  • a high-pressure water jet splashes out of a nozzle 12 against the cylinder surface and removes paint residues adhering to the printing cylinder through its impulse.
  • the roller 33 can be axially displaceable relative to its bearing 34 in order to be able to accommodate printing cylinders 2 of different lengths.
  • the nozzle 12 is arranged in a nozzle holder 40 which is fastened on a slide 50 which can be displaced along a C profile rail.
  • the longitudinal movement of the carriage 50 is controlled by an endless chain 57 attached to the carriage 50 and guided via deflection wheels 58, 59.
  • the one deflection wheel 59 is driven by a reversible motor 60.
  • the water is supplied to the nozzle 12 via a high-pressure hose 41 connected to the high-pressure line 4 and bores 42, 43.
  • a threaded spindle can also be provided, which engages in a nut attached to the slide 50.
  • the height of the rail 51 can be adjusted to adjust the distance between the nozzle 12 and the surface of the printing cylinder 2.
  • the rail 51 is fastened to swivel arms 52 which are pivotably mounted at one end by means of a bearing 53. Their swivel position is set by a cylinder 54 by means of its piston rod 55 via control lines 56.
  • a fixed rail can also be provided.
  • a vertical guide is provided on the slide 50, through which the height of the nozzle holder 40 is guided.
  • the vertical position of the nozzle holder can e.g. B. can be adjusted by a gear meshing with a rack.
  • the nozzle holder 40 is pivotably mounted on the carriage 50.
  • the slide 50 has vertical flanges 48, in which the cylindrical nozzle holder 40 is mounted.
  • the nozzle 12 is arranged in a radial attachment 44.
  • a radial arm 47 is connected to the nozzle holder 40 and is articulated on the piston rod of a cylinder 45.
  • the cylinder 45 is controlled via control lines 46.
  • both the distance of the nozzle 12 from the surface of the cylinder 2 and the pivoting angle of the nozzle 12 can be optimally adapted to the contour of the printing cylinder during the displacement of the slide 50.
  • nozzle movements can be preprogrammed so that the entire cleaning process runs automatically.
  • sensors in the cabin which scan the contour of the pressure cylinder and accordingly control the movements of the nozzle.
  • FIG. 4 a nozzle rotating during operation is shown in FIG. 4.
  • the nozzle holder 62 is fastened on a pin 61 of the slide 50 ′ so that it can rotate about a vertical axis.
  • the holes 63, 64 communicating with the high-pressure hose 41 are connected to an annular groove 65 in the nozzle holder 62.
  • the axes of the nozzles 12 connected to the annular groove 65 are arranged skew to the axis of the pin 61, so that the recoil of the water jet emerging from the nozzles 12 exerts a torque on the nozzle holder 62 and rotates it rapidly.
  • an anti-corrosion agent can be added to the water in the circuit.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (7)

1. Procédé de nettoyage pour débarrasser un cylindre d'impression (2) des restes de colorants au moyen d'un liquide, caractérisé en ce qu'un jet d'eau sous haute pression est projeté sur le cylindre d'impression sous une pression d'alimentation de plus de 100 bars de telle sorte que les restes ou résidus de colorants soient détachés d'une manière simplement mécanique par la force impulsive du jet d'eau.
2. Procédé selon la revendication 1, caractérisé en ce que l'eau projetée sur la forme d'impression (2) est recueillie, filtrée et réutilisée ensuite dans un cycle fermé.
3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comprenant une cellule de nettoyage (1) pourvue d'appuis (33, 35) pour une forme d'impression (2) et d'une buse (12) fixée sur un porte-buse (40) déplaçable dans la cellule (1) le long d'une ligne, un filtre (7) raccordé par une conduite d'écoulement (5) à la cellule (1), ainsi qu'une pompe (3) dont le côté refoulement est relié par un tuyau flexible (41) à la buse (12), caractérisé en ce que la pompe (3) est réalisée comme une pompe à eau haute pression dont la pression de service est de plus de 100 bars ; en ce que le tuyau flexible (41) est un tuyau flexible haute pression ; en ce qu'une seule buse (12) uniquement est fixée sur le porte-buse (40) ; en ce que les appuis se composent de deux paires de galets (33, 35) pour le soutien des tourillons (31) de la forme d'impression (2) conçue comme un cylindre d'impression ; et en ce que l'une des paires de galets (35) est reliée à un moteur (37) pour la rotation lente du cylindre d'impression.
4. Dispositif selon la revendication 3, caractérisé en ce que le côté aspiration de la pompe (3) est raccordé au côté écoulement du filtre (7).
5. Dispositif selon l'une quelconque des revendications 3 et 4, caractérisé en ce que le filtre (7) se compose d'une bande filtrante (25) à prélever d'un rouleau d'approvisionnement (20).
6. Dispositif selon l'une quelconque des revendications 3 à 5, caractérisé en ce que la ligne de déplacement du porte-buse (40) est réglable par rapport aux appuis (33, 35).
7. Dispositif selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le porte-buse (40) est orientable.
EP85810469A 1984-10-31 1985-10-14 Procédé et dispositif de nettoyage d'une forme d'impression Expired EP0180541B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810469T ATE47690T1 (de) 1984-10-31 1985-10-14 Verfahren und anlage zum reinigen einer druckform.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH524184 1984-10-31
CH5241/84 1984-10-31

Publications (2)

Publication Number Publication Date
EP0180541A1 EP0180541A1 (fr) 1986-05-07
EP0180541B1 true EP0180541B1 (fr) 1989-11-02

Family

ID=4290301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810469A Expired EP0180541B1 (fr) 1984-10-31 1985-10-14 Procédé et dispositif de nettoyage d'une forme d'impression

Country Status (3)

Country Link
EP (1) EP0180541B1 (fr)
AT (1) ATE47690T1 (fr)
DE (1) DE3574000D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118944A1 (de) * 1991-06-08 1992-12-10 Ind Siebdruck Systeme Neckarwe Reinigungsvorrichtung fuer druckmasken
DE4224511A1 (de) * 1992-07-24 1994-01-27 Albert Rose Zweigniederlassung Verfahren zum Entfernen der Schablonenbeschichtung auf Siebdruckformen sowie Vorrichtung zur Durchführung dieses Verfahrens
AUPM470494A0 (en) * 1994-03-24 1994-04-21 Deegan, Terence Michael Cleaning method means
DE19845367C2 (de) * 1998-10-02 2002-12-19 Gsb Wahl Gmbh Verfahren und Vorrichtung zum Reinigen von Teilen von Druckmaschinen
EP1038674A1 (fr) * 1999-02-26 2000-09-27 Alfred M. Petersen Dispositif de nettoyage à jet pour machines à imprimer
US20020157205A1 (en) * 2001-04-27 2002-10-31 Akira Hara Cylinder cleaning brush unit
DE20203521U1 (de) * 2002-03-05 2002-05-29 Technotrans Ag Filtereinrichtung für den Feuchtmittelkreislauf einer Offset-Druckmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326588A (en) * 1929-01-01 1930-03-20 Hermann Hahn Improvements in apparatus for cleaning metal articles
FR1012324A (fr) * 1950-02-10 1952-07-08 Traitement Interne Des Chaudie Machine pour le nettoyage des rouleaux de machines d'impression
FR1146383A (fr) * 1956-03-29 1957-11-12 Filtre
FR1249140A (fr) * 1960-02-25 1960-11-14 Machine pour le nettoyage et le séchage de formes d'imprimerie
US3656493A (en) * 1969-09-11 1972-04-18 Black James Screen washing apparatus
FR2288616A1 (fr) * 1974-10-21 1976-05-21 Tiflex Ets Appareil de lavage pour ecrans de serigraphie
FR2293252A1 (fr) * 1974-12-02 1976-07-02 Benhaim Albert Buse engendrant un jet a ecoulement en regime laminaire a tres haute vitesse a partir d'un fluide sous tres haute pression, plus specialement pour nettoyer une surface
DE2740923A1 (de) * 1977-09-10 1979-03-22 Woma Maasberg Co Gmbh W Vorrichtung zum reinigen von flachkoerpern o.dgl. reinigungsgut, insbesondere von kunststoffkaesten

Also Published As

Publication number Publication date
EP0180541A1 (fr) 1986-05-07
ATE47690T1 (de) 1989-11-15
DE3574000D1 (en) 1989-12-07

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