EP0277481A2 - Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour - Google Patents

Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour Download PDF

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Publication number
EP0277481A2
EP0277481A2 EP88100136A EP88100136A EP0277481A2 EP 0277481 A2 EP0277481 A2 EP 0277481A2 EP 88100136 A EP88100136 A EP 88100136A EP 88100136 A EP88100136 A EP 88100136A EP 0277481 A2 EP0277481 A2 EP 0277481A2
Authority
EP
European Patent Office
Prior art keywords
drum
printing
color
washing
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88100136A
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German (de)
English (en)
Other versions
EP0277481A3 (en
EP0277481B1 (fr
Inventor
Felice Fontana
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
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Filing date
Publication date
Application filed by Reggiani Macchine SpA filed Critical Reggiani Macchine SpA
Publication of EP0277481A2 publication Critical patent/EP0277481A2/fr
Publication of EP0277481A3 publication Critical patent/EP0277481A3/en
Application granted granted Critical
Publication of EP0277481B1 publication Critical patent/EP0277481B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • 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 a process for the automatic and simultaneous washing of all the components of the printing units used in rotary-drum fabric printing machines, keeping said components in their normal work position.
  • the scope of the present invention furthermore includes an apparatus with automatic and programmed operating cycle, adapted to provide said washing process.
  • rotary-drum printing machines for fabrics and the like use printing units each whereof is substantially constituted by a screen drum, rotatable on the fabric guided on an endless conveyor belt or carpet, into which the color is introduced by means of a tubular collector-distributor; a roller in magnetizable metal, also arranged inside the drum, is pressed by magnetic attraction onto the fabric, so as to squeeze the color through the micro-holes of the drum, thus providing the printing of the fabric.
  • Each printing unit is therefore constituted by a printing drum, by a color distribution tube and by a metallic roller.
  • the washing operations of the printing units consist of the disassembly of the drums, of the color distribution tubes and of the roller from their supports, in the placing thereof on adapted trolleys and then of their introduction into the washing units; at the end of the wash, the same components are either removed or repositioned on the printing table to allow the printing of another batch of fabric.
  • the cleaning cycle of the printing units also requires the cleaning of the color pump, which is washed automatically.
  • the main object of the present invention is to provide a process for the automatic and simultaneous washing of all the devices constituting the printing units of rotary-drum machines, without requiring their removal from their work position, as well as of the color feed pump, with obvious practical and economical advantages and with assurance of perfect cleaning of said components, including the micro-holes of the printing drums.
  • Another object of the invention is to provide a process for the simultaneous washing of all the printing devices capable of being actuated even on printing units using spatular or flexible-blade doctoring devices, again with high reliability and with highly reduced running costs and washing times.
  • a process for the simultaneous and automatic washing of printing units, kept in work position on the machine consisting, according to the present invention, of the injection, after the stopping of the printing and the removal of the printed fabric from the carpet, of pressurized water for preset successive times into the printing drum through the feed tubes and the color distribution tube, so as to force the water to mix with the residuals of color remaining within the color feed tube, within the drum, around the printing roller and in the color pump, then of the creation of a depression inside the printing drum simultaneously with, and preferably before, the injection of the washing water, so as to allow the aspiration and the removal of the water-color mixture from said printing drum, said steps of intermittent injection of pressurized water and of aspiration being controlled by an appropriately programmed microprocessor and provided with the printing machines rotating at a reduced speed with respect to the operating speed.
  • the process according to the present invention provides the injection into said wash circuit of compressed air in an intermittent manner, so as to create alternate cycles of pressurized water and compressed air, such as to facilitate the removal of the residuals of color from the piping, from the color feed tube and from the drum, the magnetic attraction units of the printing roller being activated at each injection of compressed air, so as to allow said roller, pressed against the drum, to expel onto the underlying carpet the residuals of color present in the micro-holes of said drum, the residuals remaining on the carpet being then eliminated within the wash units of said carpet.
  • an automatic-­cycle apparatus associable with the printing units of rotary-drum machines with one or more colors, comprising a screen drum, a color feed tube in its interior and a doctor in contact with the lower generatrix of said drum, substantially a roller with magnetic attraction
  • said apparatus providing, according to the present invention, quick-coupling means for the connection of the color feed tube, alternately, to the usual container of color and, by means of electric valves arranged upstream of said quick-­coupling means, to a source of pressurized washing water and to a source of compressed air, with said color feed tube there being associated, inside the printing drum, at least one tubular body connected to a vacuum pump, substantially of the liquid-ring type, arranged in front of the printing roller, according to the direction of rotation of the screen drum, and downwardly provided with openings, such as to create a continuous depression inside said drum and thus aspirate and draw out the mixture formed by the washing water, sent into the drum through the color feed tube, and by
  • said operations of alternate injection of water and air are performed with the printing machine rotating at reduced speed and with the activation of the magnetic attraction unit of the printing roller only during the compressed air injection cycles.
  • the apparatus for the automatic washing, directly in the machine, of the (one or more) printing unit(s) is provided and structured for specific use on printing machines with drums (or sweeps) rotating over a fabric-bearing carpet, closed in a loop.
  • the printing unit to be washed in place according to the invention is constituted by a screen drum 1, mounted rotating over an endless carpet 2 whereto is glued the fabric to be printed (not illustrated); the carpet is mounted taut between end rollers supported by a framework with two parallel shoulders 3.
  • a color feed tube 4 is mounted inside the printing drum 2 coaxially or parallel to the longitudinal axis of said drum, and is closed at one end 4a and connected, at the opposite end 4b, to a color container 6 by means of tubes 5 and 5a.
  • a pump 7 is interposed between the tubes 5-5a and sends the color from the container 6 inside the color feed tube 4; through a series of holes 8-8a etc.
  • This apparatus provides, according to the present invention, the installation of a pump 13, with related electric cutoff valve 15, adapted to inject pressurized water into the color feed tube 4 and thus inside the drum 1; said delivery tube 14 can be connected, by means of a mixing connection 16 inserted on said tube 14, to a source of compressed air (not illustrated) by means of an electric cutoff valve 17 and of a related one-way valve 18.
  • the delivery tube 14 is connectable, by means of a quick coupling 19 or the like, to the tube 5a during the washing step, while during the printing operation said duct 5a is connected, in a known manner, to the color container 6.
  • the apparatus furthermore provides a color feed tube 4 structured so as to perform the double function of distributor of the color inside the printing drum and, in the washing step, of conveyor of the washing water and of duct for the simultaneous expulsion from the drum of the mixture constituted by water and by the color remaining inside the tubes and in the drum itself.
  • Said particular color feed tube is constituted by a tube 4, substantially of a known type, and by a tubular body 20, arranged parallel to the tube 4 so as to have its lower longitudinal side close to the lower inner surface of the printing drum 1.
  • the tubular body 20 furthermore has its lower side in the shape of a corner, so as to have a cusp between the two angled sides 20a and 20b (figure 2) along the longitudinal extension whereof there being provided holes 21 (possibly distributed on two parallel and close rows, as indicated by 21a and 21b in figure 3), the function whereof is to allow the aspiration into said body 20 of the water-­color mixture present in the drum 1, as will become apparent hereinafter.
  • Said tubular body 20 is provided at the base of the wall 9, substantially vertical, and of the inclined wall 10-10a which constitutes its extension up to the height of the printing roller 11 and without contact therewith.
  • the aspirating body 20 is rigidly associated with the color feed tube 4 and is therefore supported by the same heads 22 which support the color feed tube.
  • the aspirating tube 20 is closed at its end 20c (figure 3), while at the opposite end it is connected, by means of a vertical duct 20d, to an external piping 23 which in turn is connected to an aspirating pump 24, of the liquid-ring type or the like.
  • An electric cutoff valve 25 is interposed between the duct 23 and the pump 24.
  • the aspirating pump 24 discharges the water-color mixture into a duct 26 from which it is drawn and sent to the water recovery devices.
  • the washing apparatus described above operates in practice as described hereinafter.
  • the machine is stopped and the fabric is removed from the carpet.
  • the tube 5a directed towards the color pump and towards the color feed tube 4, is diverted, by means of the quick-pitch coupling 19, onto the duct 14 connected to the pump 13 and to the electric valve 17. In this manner the delivery of color from the tank 6 to the printing drum is prevented.
  • the printing machine is then started, making it rotate at reduced speed and with the magnetic attraction unit of the roller disabled; then the aspirating pump 24 and the pressurized water injection pump 13 are started substantially simultaneously.
  • the water pump thus injects pressurized water into the circuit (color pump, color feed tube, drum and aspirating tube) intermittently and for preset durations of a few seconds (4-5 sec.). While the water flows in the circuit, mixing with the color remaining in the tubes and in the drum, the electric valve 17 is opened and injects air into the circuit at preset intervals, and the magnetic attraction unit of the printing roller is activated substantially simultaneously with each injection of compressed air. At each stopping of the compressed air, the magnetic attraction unit is also disabled, while the injection of pressurized water continues. These alternated cycles are repeated a few times for an overall time of 30-40 seconds.
  • the water mixes with the color remaining in the color pump, in the tubes, in the color feed tube, in the drum and around the printing roller, thus forming a mixture which is continuously aspirated and evacuated by the aspirating pump 24.
  • the presence of the compressed air facilitates, by creating an emulsion with the washing water, the elimination of any residuals of color present in the discontinuities of the ducts, but most of all it contributes to the elimination from the micro-holes of the printing drum of the color retained therein, since the roller, pressed against the carpet during the compressed air injection cycles, expels the residual from the micro-holes directly onto the carpet which is then automatically washed in the washing units with which the printing machine is fitted.
  • the apparatus according to the invention is capable of performing the thorough washing of the various devices which compose the printing head, in an automatic and simultaneous manner, by means of a single microprocessor appropriately programmed and without any intervention of the operator.
  • the automatic and simultaneous washing of the printing devices as described above can be in practice be performed by intermittently injecting only pressurized water, possibly with non-foaming and non-corrosive detergent substances added, but in this case the washing times would be longer.
  • the provision of alternate cycles of pressurized water and compressed air allows to reduce the washing times and to make the cleaning action more effective.
  • the apparatus according to the invention can be adapted for the simultaneous washing of a plurality of printing units, for example three or four printing units, and can be provided so as to wash in the machine only those printing units which have been used or only those which are to be operated, cutting off any other units present in the machine.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
  • Treatment Of Fiber Materials (AREA)
EP88100136A 1987-02-03 1988-01-08 Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour Expired - Lifetime EP0277481B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1923787 1987-02-03
IT19237/87A IT1218124B (it) 1987-02-03 1987-02-03 Procedimento e relativa apparecchiatura per il lavaggio automatico,direttamente in macchina,di tutti i componenti le unita' di stampa per macchine da stampa a cilindri rotanti

Publications (3)

Publication Number Publication Date
EP0277481A2 true EP0277481A2 (fr) 1988-08-10
EP0277481A3 EP0277481A3 (en) 1989-07-26
EP0277481B1 EP0277481B1 (fr) 1991-07-31

Family

ID=11156012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100136A Expired - Lifetime EP0277481B1 (fr) 1987-02-03 1988-01-08 Procédé et appareil pour le nettoyage automatique de pièces d'unités d'impression pour rotatives d'impression à tambour

Country Status (3)

Country Link
EP (1) EP0277481B1 (fr)
DE (1) DE3863931D1 (fr)
IT (1) IT1218124B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364918A2 (fr) * 1988-10-20 1990-04-25 MASCIONI S.p.A. Cylindre d'impression avec dispositif de nettoyage, en particulier pour presses rotatives
EP0494339A1 (fr) * 1991-01-08 1992-07-15 REGGIANI MACCHINE S.p.A. Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour
EP0556460A1 (fr) * 1992-02-18 1993-08-25 Paper Converting Machine Company Appareil d'impression et procédé
WO1995021701A3 (fr) * 1994-02-12 1995-10-19 Johannes Zimmer Dispositif d'amenee d'une substance a un emplacement d'application, procede pour l'amenee d'une substance et pour le nettoyage du dispositif, ainsi que procede pour la fabrication du dispositif et systeme auxiliaire pour le nettoyage du dispositif
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
EP0743181A1 (fr) * 1995-05-18 1996-11-20 J. Zimmer, Maschinenbau Gesellschaft m.b.H. Kufstein Dispositif de distribution d'un fluide
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
US6135025A (en) * 1994-02-12 2000-10-24 Zimmer; Johannes Process and device for cleaning an application device
US6431064B1 (en) 1998-10-16 2002-08-13 Stork Brabant B.V. Screen-printing device with printing-station shield
DE102015224334A1 (de) 2015-12-04 2017-06-08 Henkel Ag & Co. Kgaa Einsatz von Additiven zur effektiven Konservierung / boostende Wirkung bestehender Konservierung kosmetischer Emulsionen
CN108099401A (zh) * 2016-06-28 2018-06-01 海宁酷彩数码科技有限公司 一种便于供墨的纸板压印装置

Citations (3)

* 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
JPS60168657A (ja) * 1984-02-13 1985-09-02 Toshin Kogyo Kk ロ−タリスクリ−ン捺染機におけるカラ−パイプの洗浄方法
EP0166616A2 (fr) * 1984-06-27 1986-01-02 Burns, William P. Procédé et dispositif de nettoyage pour pinces

Patent Citations (3)

* 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
JPS60168657A (ja) * 1984-02-13 1985-09-02 Toshin Kogyo Kk ロ−タリスクリ−ン捺染機におけるカラ−パイプの洗浄方法
EP0166616A2 (fr) * 1984-06-27 1986-01-02 Burns, William P. Procédé et dispositif de nettoyage pour pinces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 2 (M-444) 2059 08 January 1986, & JP-A-60 168 657 (TOUSHIN KOGYO K.K.) *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364918A3 (fr) * 1988-10-20 1991-05-02 MASCIONI S.p.A. Cylindre d'impression avec dispositif de nettoyage, en particulier pour presses rotatives
EP0364918A2 (fr) * 1988-10-20 1990-04-25 MASCIONI S.p.A. Cylindre d'impression avec dispositif de nettoyage, en particulier pour presses rotatives
EP0494339A1 (fr) * 1991-01-08 1992-07-15 REGGIANI MACCHINE S.p.A. Appareil pour le nettoyage automatique d'unités d'impression, en particulier pour machines rotatives d'impression à tambour
EP0556460A1 (fr) * 1992-02-18 1993-08-25 Paper Converting Machine Company Appareil d'impression et procédé
US6135025A (en) * 1994-02-12 2000-10-24 Zimmer; Johannes Process and device for cleaning an application device
WO1995021701A3 (fr) * 1994-02-12 1995-10-19 Johannes Zimmer Dispositif d'amenee d'une substance a un emplacement d'application, procede pour l'amenee d'une substance et pour le nettoyage du dispositif, ainsi que procede pour la fabrication du dispositif et systeme auxiliaire pour le nettoyage du dispositif
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
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
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
EP0743181A1 (fr) * 1995-05-18 1996-11-20 J. Zimmer, Maschinenbau Gesellschaft m.b.H. Kufstein Dispositif de distribution d'un fluide
US5848606A (en) * 1995-05-18 1998-12-15 J. Zimmer Maschinebau Gesellschaft M.B.H. Device for distributing pourable medium
US6431064B1 (en) 1998-10-16 2002-08-13 Stork Brabant B.V. Screen-printing device with printing-station shield
DE102015224334A1 (de) 2015-12-04 2017-06-08 Henkel Ag & Co. Kgaa Einsatz von Additiven zur effektiven Konservierung / boostende Wirkung bestehender Konservierung kosmetischer Emulsionen
CN108099401A (zh) * 2016-06-28 2018-06-01 海宁酷彩数码科技有限公司 一种便于供墨的纸板压印装置
CN108099401B (zh) * 2016-06-28 2019-05-10 杭州恒达印刷包装有限公司 一种便于供墨的纸板压印装置

Also Published As

Publication number Publication date
EP0277481A3 (en) 1989-07-26
IT8719237A0 (it) 1987-02-03
DE3863931D1 (de) 1991-09-05
EP0277481B1 (fr) 1991-07-31
IT1218124B (it) 1990-04-12

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