EP0494339A1 - Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour - Google Patents

Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour Download PDF

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Publication number
EP0494339A1
EP0494339A1 EP91114502A EP91114502A EP0494339A1 EP 0494339 A1 EP0494339 A1 EP 0494339A1 EP 91114502 A EP91114502 A EP 91114502A EP 91114502 A EP91114502 A EP 91114502A EP 0494339 A1 EP0494339 A1 EP 0494339A1
Authority
EP
European Patent Office
Prior art keywords
dye
cylinder
roller
tube
washing
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.)
Ceased
Application number
EP91114502A
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German (de)
English (en)
Inventor
Felice Fontana
Mario Panseri
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.)
Reggiani Macchine SpA
Original Assignee
Reggiani Macchine SpA
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 Reggiani Macchine SpA filed Critical Reggiani Macchine SpA
Publication of EP0494339A1 publication Critical patent/EP0494339A1/fr
Ceased 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
    • B41F35/003—Cleaning arrangements or devices for screen printers or parts thereof
    • B41F35/004—Cleaning arrangements or devices for screen printers or parts thereof for cylindrical screens

Definitions

  • the present invention relates to an apparatus for automatically washing all the components of the printing units used in rotary-drum machines for printing fabrics and the like, keeping said components in their operating position.
  • single- or multiple-dye rotary-drum printing machines for fabrics use printing units which are substantially constituted by a rotary-drum, or screen cylinder, which can rotate on the fabric which is guided by an endless conveyor belt.
  • the dye is fed inside the roller by means of a tubular manifold-distributor.
  • a magnetizable metallic roller, arranged inside the cylinder, is pressed onto the fabric by magnetic attraction, so as to squeeze the dye through the microperforations of the cylinder, thus printing the fabric.
  • Each printing unit is thus constituted by a screen cylinder, a dye distribution tube and a metallic roller.
  • the endless belt is normally washed and cleaned by a washing unit fitted in the printing machine, while the components of the various printing units are removed from the working surface and are washed inside appropriate washing units which are arranged proximate to the printing machine.
  • the operations for washing the printing units consist of disassemblying the cylinders, the dye distribution tubes and the roller from their supports, placing thereof on adapted trolleys and then inserting in the washing units; at the end of the washing, said components are either stored or repositioned on the printing surface in order to allow the printing of another batch of fabric.
  • the printing unit cleaning cycle also requires the cleaning of the dye pump, which is washed automatically.
  • an automatic process for washing all the components of each printing unit, while keeping them in working position essentially comprises feeding pressurized water and air inside the cylinder, the dye distribution tube and the dye feed pump, and subsequently removing by suction the water-dye mixture,according to alternating cycles having a preset duration, while keeping the machine running at reduced speed.
  • the aim of the present invention is therefore to provide an apparatus, for automatically washing, directly in the machine, the components of printing units of rotary-drum machines, that completely obviates the disadvantages and limitations of both systems for washing on separate washing units and the system for automatic washing by means of alternating cycles of pressurized water and air feed.
  • An object of the invention is to provide an apparatus for automatically washing rotary-drum printing units which is conceived so as to have a small area occupation, requires extremely reduced washing times and allows the execution of all the operating steps without the intervention of the operator.
  • an apparatus for automatically washing the components of a printing unit while keeping them in operating position of printing machines comprising a roller arranged inside a perforated cylinder, an electromagnet means arranged below an endless belt and adapted to keep said roller on the inner surface of said cylinder, and a dye distribution tube which is arranged inside said perforated cylinder and is connected to a dye feed pump, characterized in that it comprises an outer tube arranged inside said perforated cylinder and coaxial to said dye distribution tube, said dye distribution tube being arranged inside said outer tube in order to form an interspace between said dye distribution tube and said outer tube, said dye distribution tube being provided with nozzles for feeding dye inside said cylinder, said outer tube being also provided with nozzles in order that said said interspace may distribute washing water inside said roller, said distribution tube, said interspace and said dye feed pump being alternatively connected to a pump means for feeding washing water and to a compressed air source, through valve means, a hollow body being associated with said outer tube
  • said alternating feed steps of pressurized water and air are programmed so as to be performed while the printing machine rotates at reduced speed and while the printing roller is raised during the cylinder washing cycles and during the step of final drying thereof.
  • said annular interspace between said coaxial tubes is provided with nozzles along its entire length and with closely spaced end nozzles suitable for allowing the thorough washing of the heads which support the screen cylinders.
  • a conventional rotary-drun printing unit normally has each rotary-drum, or screen cylinder, rotatably mounted on an endless belt on which the fabric to be printed is glued; the screen cylinder is supported, at the opposite end, by motorized heads, and a rectilinear dye feed tube is mounted coaxially inside said cylinder (or parallel to the axis thereof), is provided with nozzles for distributing the dye inside the cylinder and is connected, at one of its ends, to a dye feed pump.
  • a magnetizable roller is arranged in contact with the lower generatrix of the cylinder 1, which is in turn arranged in contact with the fabric which is anchored to the belt; said roller is constantly attracted toward the carpet by an electromagnet and thus forces the dye, which is emitted by the nozzles of the overlying dye feed tube, to pass through the microperforations of the cylinder, thus printing the fabric.
  • the present invention provides a highly effective apparatus such as the one illustrated in the above described figures.
  • two coaxial rectilinear tubes 2 and 3 are arranged within a microperforated drum, or cylinder 1, the inner one 2 is the tube which distributes dye during the printing step and water during the washing step, whereas the annular interspace 3a forms a duct for feeding and distributing pressurized washing water inside the cylinder 1, as will become apparent hereinafter.
  • the dye feed tube 2 is longer than the outer tube 3 and is connected ( Figure 1), at one end, to a conventional dye feed pump 4 by means of two portions of flexible tubes or the like 5-5a which are connected to the tube 2 by a quick-coupling 6; at the opposite end, said tube 2 is provided with an electric valve 2a the output whereof is directed to a discharge 7 by means of a pipe 8 the function whereof will become apparent hereinafter.
  • Dye distribution nozzles 9 are furthermore associated with the inner dye feed tube 2 and pass, with a tight seal, through the cylindrical wall of the outer tube 3 ( Figures 1 and 3) so as to feed the dye into the cylinder 1, in the rear region, according to the direction of rotation of said roller, to a printing roller 10 which, according to the invention, is preferably constituted by a cylindrical tubular body made of magnetizable metal.
  • the roller 10 is freely arranged, in a per se known manner, along the generatrix of the cylinder which is in contact with the fabric which is anchored to the endless belt 11, and is attracted against said belt by an electromagnet 12 which is arranged below the belt itself.
  • a flattened hollow body 15, formed by two facing walls 13-13a, is furthermore associated with the outside of the tube 3 which is coaxial to the dye distribution tube; the lower closure side 13b of said hollow body is at a very small distance from the inner surface of the cylinder and extends substantially along the entire length of the outer tube 3.
  • the lower end of said flattened hollow body 15 is furthermore preferably closed by a longitudinal wall 15a so as to define a continuous channel 16 which is provided, on its bottom side, with a series of openings 17 (Figure 1) which are thus close to the inner surface of the cylinder.
  • Said channel 16 is closed at its end 16a and is connected, at the opposite end, to the interspace 3a by means of a tube 16b the vertical wall 16c whereof can be provided with openings.
  • An array of magnetized plates 20, arranged with alternating polarities, is furthermore arranged inside the hollow body 15 ( Figures 2 and 3); their function is to attract and partially raise the roller 10 from the cylinder, during the washing cycles, at each interruption of the attraction exerted on said roller by the magnetic unit 12 arranged below the belt 11.
  • the channel 16 acts as a duct for drawing the mixture, constituted by washing water and dye, produced during the washing cycles of the cylinder and of the distribution tube 2, as will be described in greater detail hereinafter.
  • the above mixture is removed by suction continuously by a suction pump 18 which is connected to the interspace 3a by means of a tube 19.
  • the apparatus furthermore comprises a washing water feed pump 21 which is suitable for sending pressurized water into the dye pump 4 through the tubes 22 and 23, inside the interspace 3a through the tube 24 and inside the dye feed tube 2 through the pipe 5a-5; a mixing connector 26 ( Figure 1) is furthermore interposed between the pipes 22 and 23 and is also connected to a source of compressed air (not illustrated in the figures) by means of a tube 27 on which an electric cutoff valve 28 is fitted.
  • the electric valves 29 and 30 are also respectively inserted on the tubes 22 and 24.
  • a microprocessor is associated with the above described apparatus and is programmed to adjust the alternating interventions, lasting for preset times, of the water feed pump, of the compressed air pump, of the related electric valves and of the liftings and lowerings of the magnetic roller, according to consecutive and automatic operating cycles which are described hereinafter in detail for a single cylinder; in practice, however, said microprocessor can be programmed for the simultaneous washing of a plurality of cylinders.
  • the belt is stopped and the printed fabric is removed; the machine thus has the dye pump 4 motionless, the electric valve 2a of the dye feed tube closed and the electric valves 28-29 and 30 of the pumps also closed.
  • the apparatus is then preset, by means of a microprocessor and a related selector, for the washing of the cylinder or cylinders, of the dye pump, of the tubes 5 and 5a and of the dye feed tube 2.
  • the belt and the cylinders are slowly rotated, the suction pump 18 is started and the electric valve 2a of the tube 2 is opened; the pre-washing step thus begins.
  • the water and air feed pumps are thus started and feed the pressurized fluids into the dye pump, the tubes 5-5a and the tube 2 by means of the electric valves 28 and 29, alternating brief periods of injection of water and air to facilitate the complete cleaning of the above devices.
  • the suction pump 18 removes the water-dye mixture through the duct 16, sending it to the discharge 7 by means of the duct 19.
  • the electric valve 30 is then opened so as to feed water, through already cleaned tubes, into the interspace 3a which, through the nozzles 3b, feeds pressurized water for washing the wall 13a of the box-like body 15.
  • the print roller 10 is attracted by the array of magnetic plates 20 and raised from cylinder (after stopping the magnetic attraction unit 12), thus allowing the suction duct 16 to completely draw the water and dye mixture.
  • This pre-washing step is completed by performing at least two cycles of alternating injection of pressurized water and air; said cycles are performed by means of the electric valves 28, 29 and 30, and after these two cycles the cylinder 1 is automatically raised from the belt for a short period of time, then the belt is accelerated so as to carry forward (i.e. toward the belt washing unit, which is always present on the printing machine) the liquid which has escaped from the cylinder, along the direction of advancement of the belt.
  • the cylinder is then again placed on the belt, and the electromagnet 12 is energized so as to attract the roller 10 and return it into contact with the lower generatrix of the cylinder; the roller thus squeezes the water which has remained within the cylinder, making it escape through the microperforations.
  • said microprocessor starts the thorough washing step with a preset number of water-air cycles alternated with liftings and lowerings of the print rollers in order to allow the removal by suction of the mixture contained in the cylinder and the squeezing of the water through the microperforations in order to wash said cylinder.
  • the cylinder is raised, the roller is moved away from the cylinder by means of said magnetized plates and the belt is accelerated so as to allow it to rapidly remove the water which has accumulated behind the cylinder; said water is then removed by the belt washing unit.
  • the cylinder is lowered again and the electromagnet 12 is energized for approximately 10 seconds; this allows the roller 10 to squeeze the water, which is now clean, through the microperforations so as to complete the washing of the cylinder, and the drying step simultaneously begins with the introduction of compressed air through the electric valve 28.
  • the cylinder is raised for a short time to facilitate the cleaning of the microperforations with compressed air.
  • the above described washing apparatus can be applied to a plurality of printing units of a multiple-dye machine and can be programmed so as to perform the washing, whether simultaneous or in subsequent moments, only of the units which are to be used, excluding from the washing operations any other printing units present on the same machine.

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  • Screen Printers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP91114502A 1991-01-08 1991-08-29 Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour Ceased EP0494339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI910026A IT1247795B (it) 1991-01-08 1991-01-08 Apparecchiatura per il lavaggio automatico delle unita' di stampa, mantenute in posizione di lavoro, utilizzate sulle macchine da stampa a cilindri rotanti
ITMI910026 1991-01-08

Publications (1)

Publication Number Publication Date
EP0494339A1 true EP0494339A1 (fr) 1992-07-15

Family

ID=11358033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114502A Ceased EP0494339A1 (fr) 1991-01-08 1991-08-29 Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour

Country Status (2)

Country Link
EP (1) EP0494339A1 (fr)
IT (1) IT1247795B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021745A1 (fr) * 1994-02-12 1995-08-17 Johannes Zimmer Procede et dispositif de nettoyage d'applicateurs
WO1995021746A3 (fr) * 1994-02-12 1995-10-26 Johannes Zimmer Dispositif autonettoyant permettant d'appliquer une substance sur une bande de materiau
EP0714772A2 (fr) 1994-11-30 1996-06-05 REGGIANI MACCHINE S.p.A. Appareil pour laver de façon complètement automatique des unités d'impression de machines d'impression avec rouleaux rotatifs
EP0865920A2 (fr) * 1997-03-18 1998-09-23 Ichinose International Incorporated Presse rotative sérigraphique à imprimer sur tissus
US6135025A (en) * 1994-02-12 2000-10-24 Zimmer; Johannes Process and device for cleaning an application device
DE102004058570B3 (de) * 2004-12-03 2006-06-01 Technotrans Ag Vorrichtung zur Zufuhr von Waschmittel
CN112342717A (zh) * 2020-10-28 2021-02-09 无锡迈克斯纺织品有限公司 一种全棉抗菌双面布料的印染生产工艺及其生产装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110588169A (zh) * 2019-08-20 2019-12-20 湖南金时科技有限公司 一种温控流体版辊内壁清洗装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338209B (de) * 1973-02-13 1977-08-10 Zimmer Peter Einrichtung zur reinigung von rakeleinrichtungen
EP0056630A1 (fr) * 1981-01-21 1982-07-28 Kleinewefers, Jaeggli AG Machine rotative de sérigraphie
EP0277481A2 (fr) * 1987-02-03 1988-08-10 REGGIANI MACCHINE S.p.A. Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour
EP0364918B1 (fr) * 1988-10-20 1994-08-31 MASCIONI S.p.A. Cylindre d'impression avec dispositif de nettoyage, en particulier pour presses rotatives

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338209B (de) * 1973-02-13 1977-08-10 Zimmer Peter Einrichtung zur reinigung von rakeleinrichtungen
EP0056630A1 (fr) * 1981-01-21 1982-07-28 Kleinewefers, Jaeggli AG Machine rotative de sérigraphie
EP0277481A2 (fr) * 1987-02-03 1988-08-10 REGGIANI MACCHINE S.p.A. Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour
EP0364918B1 (fr) * 1988-10-20 1994-08-31 MASCIONI S.p.A. Cylindre d'impression avec dispositif de nettoyage, en particulier pour presses rotatives

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 2 (M-444)(2059) 8 January 1986 & JP-A-60 168 657 ( TOUSHIN KOGYO K.K. ) 2 September 1985 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6135025A (en) * 1994-02-12 2000-10-24 Zimmer; Johannes Process and device for cleaning an application device
WO1995021746A3 (fr) * 1994-02-12 1995-10-26 Johannes Zimmer Dispositif autonettoyant permettant d'appliquer une substance sur une bande de materiau
CN1081987C (zh) * 1994-02-12 2002-04-03 约翰尼斯·齐默 涂敷装置的清洗方法及装置
WO1995021745A1 (fr) * 1994-02-12 1995-08-17 Johannes Zimmer Procede et dispositif de nettoyage d'applicateurs
US5775218A (en) * 1994-02-12 1998-07-07 Zimmer; Johannes Self-cleaning apparatus for the application of a substance on a fabric train and process of operation thereof
CN1065482C (zh) * 1994-02-12 2001-05-09 约翰尼斯·齐默 在织物上涂染料的装置及其清洗方法
EP0714772A3 (fr) * 1994-11-30 1996-11-27 Reggiani Macchine Spa Appareil pour laver de façon complètement automatique des unités d'impression de machines d'impression avec rouleaux rotatifs
EP0714772A2 (fr) 1994-11-30 1996-06-05 REGGIANI MACCHINE S.p.A. Appareil pour laver de façon complètement automatique des unités d'impression de machines d'impression avec rouleaux rotatifs
EP0865920A3 (fr) * 1997-03-18 1999-03-10 Ichinose International Incorporated Presse rotative sérigraphique à imprimer sur tissus
EP0865920A2 (fr) * 1997-03-18 1998-09-23 Ichinose International Incorporated Presse rotative sérigraphique à imprimer sur tissus
CN1093469C (zh) * 1997-03-18 2002-10-30 株式会社一濑国际 旋转筛网纺织印花机
DE102004058570B3 (de) * 2004-12-03 2006-06-01 Technotrans Ag Vorrichtung zur Zufuhr von Waschmittel
CN112342717A (zh) * 2020-10-28 2021-02-09 无锡迈克斯纺织品有限公司 一种全棉抗菌双面布料的印染生产工艺及其生产装置

Also Published As

Publication number Publication date
ITMI910026A0 (it) 1991-01-08
IT1247795B (it) 1995-01-02
ITMI910026A1 (it) 1992-07-08

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