EP1336480A1 - Verfahren und Vorrichtung zur Dekoration durch Siebdruck von keramischen Fliesen oder dergleichen - Google Patents

Verfahren und Vorrichtung zur Dekoration durch Siebdruck von keramischen Fliesen oder dergleichen Download PDF

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Publication number
EP1336480A1
EP1336480A1 EP03425095A EP03425095A EP1336480A1 EP 1336480 A1 EP1336480 A1 EP 1336480A1 EP 03425095 A EP03425095 A EP 03425095A EP 03425095 A EP03425095 A EP 03425095A EP 1336480 A1 EP1336480 A1 EP 1336480A1
Authority
EP
European Patent Office
Prior art keywords
silkscreen printing
screen
printing screen
item
decorated
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.)
Withdrawn
Application number
EP03425095A
Other languages
English (en)
French (fr)
Inventor
Marco Sante Montipo'
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.)
Gruppo Concorde SpA
Original Assignee
Gruppo Concorde 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 Gruppo Concorde SpA filed Critical Gruppo Concorde SpA
Publication of EP1336480A1 publication Critical patent/EP1336480A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0809—Machines for printing sheets with cylindrical or belt-like screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/40—Inking units
    • B41F15/405—Spraying apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/13—Devices for increasing ink penetration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/13—Devices for increasing ink penetration
    • B41P2215/132—Devices for increasing ink penetration by increasing pressure above the screen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/50—Screen printing machines for particular purposes
    • B41P2215/56—Screen printing machines for particular purposes for printing ceramic tiles

Definitions

  • the present invention relates to a device and a method for silkscreen printing decoration by transfer of items of various form and especially, although not exclusively, ceramic tiles or other rigid products.
  • the screen As the doctor exerts a downward pressure as it advances, that is towards the item to be decorated, the screen is deformed in a downward direction towards the surface to be decorated at the relative successive positions of the doctor. In this way each drop of ink which has passed through the screen comes into contact with the surface to be decorated and remains attached to it. Immediately after this, as the doctor has moved forward in relation to the point of contact with the item to be decorated, the screen retreats and is no longer in contact with the surface of the item, in order not to spoil the deposit which has just taken place.
  • a device for silkscreen printing decoration of items with a complex shape, such as plates or the like, is described in IT-B-1117838.
  • the object of the present invention is to produce a device and a method which make it possible to produce silkscreen printing decorations even on surfaces which are extremely rough or in any case very uneven, such as the surfaces of tiles reproducing natural split stone, producing a high definition decoration.
  • the object of an improved embodiment of the invention is to produce a silkscreen printing method and device which allow high flexibility and make it unnecessary to have a silkscreen printing screen or net for each pattern one wishes to reproduce on the item to be decorated.
  • the silkscreen printing ink is transferred through the silkscreen printing net or screen to the item to be decorated through the action of at least one air flow, the item to be decorated and the air flow having a relative movement parallel to the surface to be decorated of said item.
  • the ink to be transferred is distributed on one face of the silkscreen printing net or screen so that it fills the open meshes of the net fabric and is successively transferred towards the surface to be decorated because of the impact of the air flow. Transfer thus occurs without reciprocal contact between the screen and the surface to be decorated.
  • the latter may thus have protrusions, roughness, unevenness or even considerable defects in its planarity, without this negatively influencing the quality of the decoration.
  • the method may be implemented either with a flat screen or with a rotary cylindrical screen.
  • the silkscreen printing ink may be applied by a doctor on the surface of the silkscreen printing screen, positioning the doctor directly upstream of the zone of action of the air jet.
  • the air flow or jet is created by a slotted nozzle, and thus has a laminar form.
  • the air flow constitutes an aerodynamic doctor which replaces the mechanical doctor of traditional systems.
  • the length of the slot is about equal to the useful width of the silkscreen printing screen.
  • the latter has, in a per se known way, a pattern corresponding to the negative of the pattern to be reproduced on the tile or other item to be decorated.
  • the meshes of the net fabric corresponding to zones of the item which are not to receive ink will be closed, while the meshes corresponding to zones which are to receive ink will be open to allow the ink to pass through owing to the effect of the air thrust.
  • an air flow is produced by a plurality of air jets, for example by a series of small nozzles placed side by side according to preferably transverse alignment in relation to the relative movement of the item to be decorated.
  • the air jets produced by the individual nozzles are controlled in a programmed manner, by means of a central control unit, to form the decoration, while the silkscreen printing screen has an active zone formed of a plurality of open meshes without a pattern, that is without closed meshes.
  • the silkscreen printing ink is in this case distributed so as to fill all the meshes of the screen and is projected onto the surface of the item to be decorated selectively by operating the nozzles in suitable time sequences synchronized with the relative movement between the item to be decorated and the nozzles.
  • Combination of relative movement between the item to be decorated and nozzles on the one hand and controlled opening and closing of each single nozzle makes it possible to produced even complicated patterns without having to change the screen.
  • the screen will be a universal screen. The different patterns will be attained simply by loading the control unit with the necessary program for correct control of nozzle opening and closing.
  • the object of the present invention is also a device for silkscreen printing decoration by transfer, comprising: a silkscreen printing net or screen; supporting means to position an item to be decorated in front of said silkscreen printing screen; means to apply a silkscreen printing ink to said silkscreen printing net or screen and to transfer it to said item.
  • the device characteristically comprises at least one nozzle positioned in front of said silkscreen printing screen on the opposite side in relation to the item to be decorated, said nozzle producing an air jet which causes the silkscreen printing ink to transfer from the silkscreen printing screen to the item, the nozzle and the silkscreen printing screen being movable in relation to each other.
  • the nozzle has an elongated air outlet to produce an air jet of laminar form.
  • the device comprises a plurality of nozzles which produce corresponding air jets and advantageously a control unit for timed control of their opening and closing as described above.
  • Figs. 1 and 2 represent in a highly schematic way a first embodiment of the invention with the use of a rotary cylindrical silkscreen printing net or screen. Only the parts required to understand the invention are represented in the drawing, it being understood that the remaining parts of the device, and in particular of the silkscreen printing screen may be produced according to any known method.
  • the screen may be supported (cantilevered or with a support at both ends), stretched and made to rotate suitably for example with systems known to those skilled in the art.
  • known systems may be used to supply the silkscreen printing ink to the screen.
  • the screen is generically indicated with 1 and rotates around its horizontal axis A-A. It is constituted by a net fabric and has watertight zones 1A and zones 1B permeable to silkscreen printing ink. These permeable and watertight zones are obtained with known systems through the use of photosensitive emulsions.
  • Under the silkscreen printing screen is a transport system constituted by a conveyor 3 which may be composed of a series of parallel belts.
  • the tiles P to be silkscreen printed are laid on the conveyor 3.
  • the direction of advance of the tiles P, indicated by the arrow fP, is the same as the direction of rotation (arrow f1) of the silkscreen printing screen 1 around its axis A-A, so that in the zone in which the upper surface of the tile P to be decorated and the screen 1 are the closest to each other, the peripheral speed of the screen is substantially equal both in modulus and in direction.
  • a blade nozzle 5 Housed inside the cylindrical volume defined by the screen 1 is a blade nozzle 5 which is supplied with compressed air through a duct 5A.
  • the nozzle 5 extends for the entire useful width of the screen, in an orthogonal direction to the plane of the figure.
  • the nozzle 5 outlet is in proximity to the internal surface of the cylindrical screen, in front of the zone closest to the conveyor 3 and therefore to the tile P to be decorated which travels under the screen.
  • a fixed inking doctor 7 is positioned, supported, as is the nozzle 5, by a support coaxial to the screen, not shown in the drawing.
  • the silkscreen printing ink I is deposited, via a duct not shown, in front of the inking doctor 7.
  • the ink I wets the surface of the screen and fills all the open meshes of the screen, that is the zone not closed by the emulsion distributed in the zones 1A.
  • the ink is transferred to the tile P because of the air jet according to a pattern which reproduces the pattern on the silkscreen printing screen 1.
  • the ink is expelled from the net because of the air current produced by the nozzle 5, no physical contact between the tile P and the external surface of the screen 1 is required.
  • Each portion of the silkscreen printing screen from which the ink was expelled by the air current produced by the nozzle 5 is once more loaded with ink as soon as it travels in front of the doctor 7 to allow decoration of the subsequent tile.
  • Fig. 2 shows the same device as Fig. 1, used to decorate the surface of a tile P1 which is not smooth like the example in Fig.1, but extremely uneven, as is typically the case in tiles with surfaces imitating natural split stone.
  • Figs. 3 and 4 schematically show the same inventive concept applied to a flat silkscreen printing screen or net.
  • the two figures differ solely as concerns the nature of the surface to be decorated.
  • Fig.3 this is a substantially smooth and flat surface, while in Fig.4 it is an uneven surface.
  • the silkscreen printing screen is again indicated with 1, the nozzle with 5, the air supply duct with 5A and the tile to be decorated with P and P1.
  • the nozzle 5 moves in the direction of the arrow f5 in relation to the screen and in relation to the tile P or P1.
  • the nozzle 5 is carried by moving equipment 4 on which the doctor 7 is also carried. This may be provided with a lifting movement so as not to interfere with the screen 1 during its return movement.
  • two inking doctors may also be provided, disposed on opposite sides of the nozzle 5 and carried in the operating position alternately, so as to distribute the ink in the mesh of the silkscreen printing screen 1 both with a movement according to the arrow f5, and with a movement in the opposite direction, thus increasing productivity of the device.
  • the nozzle 5 may be a nozzle formed by two converging plates to form a chamber with a V-section as indicated schematically in Figs. 1 to 4, if necessary it being possible to adjust the distance between the output edges of the plates. Nonetheless, nozzles of different configuration may also be used, such as of the type commonly used to produce air curtains.
  • a nozzle of this type is schematically indicated in the embodiment in Figs. 5 and 6. It may be for example a blower of the type marketed by CER srl, Italy, with the trade name of ARTX Air curtain. These systems are commonly utilized to remove water, debris or other items from plates, plastic films, conveyors and the like, to create isolating curtains between consecutive phases in industrial processes, to cool semi-finished products and for similar applications.
  • Figs. 5 and 6 equivalent or corresponding parts to those in Figs. 1 and 2 are indicated with the same reference numbers.
  • the nozzle 5 has an outlet 5B emitting an air current with moderate flow rate, which continues to adhere to the profile of the nozzle, undergoing a downward deflection until it produces an air curtain C with a much higher flow rate to the one emitted from the outlet 5B, thanks to the drawing effect on the surrounding air.
  • the nozzle 5 and the inked doctor 7 are supported by a supporting beam 9 parallel to the axis A-A of the screen 1.
  • Figs. 7 and 8 show, in analogous views and sections to Figs. 5 and 6, an improved embodiment. Equivalent numbers indicate equivalent or corresponding parts to those in the embodiment in Figs. 5 and 6.
  • This further embodiment differs from the previous one in that the single elongated nozzle 5 forming an air curtain is replaced by a series of small nozzles 5X side by side to one another and aligned along a direction parallel to the axis A-A of the cylindrical screen 1.
  • Each nozzle 5X is controlled by a programmable control unit, represented schematically and indicated with 11, which also controls the forward movement of the conveyor 3 and the rotary motion of the silkscreen printing screen 1.
  • the control unit 11 is capable of synchronizing opening and closing of the single nozzles 5X with the rotary movement of the silkscreen printing screen 1 and with the forward movement of the tiles P, according to a memorized program.
  • the screen 1 is wholly constituted by a fabric the meshes of which are open. In other words, it does not have a pattern constituted by closed meshes and open meshes, reproducing in negative the pattern to be silkscreen printed on the tiles.
  • the pattern is produced in this case by synchronized control of opening and closing of the nozzles 5X and of the forward movement of the silkscreen printing screen and of the tiles.
  • Each mesh of the screen 1 is filled with ink I in the zone of action of the inking doctor 7.
  • the inked zone of the screen passes in front of the nozzles 5X, some meshes are struck by air jets produced by the nozzles which are opened and the ink is projected from said meshes onto the tile P underneath.
  • Other meshes which travel in front of nozzles which are not opened, withhold the ink inside them.
  • the meshes travel again under the zone of action of the inking doctor 7, all the meshes are loaded with fresh ink.
  • all the meshes may be cleaned by an elongated nozzle analogous to the one in the previous embodiments, positioned in an inactive zone of the screen's travel, for example directly upstream of the zone of action of the doctor 7.
  • a recovery tray, positioned externally to the screen may be used to collect and recycle the silkscreen printing ink. In this case the doctor blade 8 may be omitted.
  • the desired pattern may thus be produced on each tile, using an entirely featureless screen, that is without any decoration.
  • this permits extremely high flexibility, as it is possible to produce in sequence a high number of patterns on tiles which are made to travel in succession under the silkscreen printing screen 1, the number of patterns being in substance limited only by the calculation and storage capacities of the control unit 11.
  • each pattern no longer requires to be reproduced on a specific silkscreen printing screen or net, but simply memorized on a specific storage medium, while there is only one screen which may be used for any pattern.
  • the screen must only be changed when it becomes necessary to modify the dimension of the meshes and/or the dimension of the threads which form the screen or net, in order to change the quantity of ink transferred to the item to be decorated.
  • the nozzles 5X are distributed according to two or more alignments, preferably parallel to the axis A-A of the screen 1 and staggered from one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP03425095A 2002-02-18 2003-02-18 Verfahren und Vorrichtung zur Dekoration durch Siebdruck von keramischen Fliesen oder dergleichen Withdrawn EP1336480A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI20020029 2002-02-18
IT2002FI000029A ITFI20020029A1 (it) 2002-02-18 2002-02-18 Metodo e dispositivo per la decorazione per serigrafia di piastrelle ceramiche o simili

Publications (1)

Publication Number Publication Date
EP1336480A1 true EP1336480A1 (de) 2003-08-20

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ID=27620691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425095A Withdrawn EP1336480A1 (de) 2002-02-18 2003-02-18 Verfahren und Vorrichtung zur Dekoration durch Siebdruck von keramischen Fliesen oder dergleichen

Country Status (2)

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EP (1) EP1336480A1 (de)
IT (1) ITFI20020029A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004061347A2 (en) * 2003-01-07 2004-07-22 Loughborough University Enterprises Limited Method and apparatus for transferring material to a substrate
EP1598188A1 (de) * 2004-05-18 2005-11-23 José Luis Novo Rodriguez Vorrichtung zum Siebdrucken von keramischen Gut
WO2006024552A1 (en) * 2004-09-03 2006-03-09 Sichenia Gruppo Ceramiche S.P.A. Machine for wet screen printing of substantially flat elements, particularly ceramic articles
EP1726422A2 (de) * 2005-05-23 2006-11-29 Paola Ferrari Rollensieb zur Dekoration von Fliesen mit Flüssigstrahldüsen
WO2007091136A1 (en) * 2006-02-07 2007-08-16 System S.P.A. An apparatus for decorating ceramic products
DE102011015456A1 (de) * 2011-03-30 2012-10-04 Thomas Walther Siebdruckverfahren und dazu gehörige Vorrichtung
CN108749287A (zh) * 2018-05-30 2018-11-06 佛山领新信息科技有限公司 一种玻璃无网丝印机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112829446A (zh) * 2021-03-18 2021-05-25 上达电子（深圳）股份有限公司 一种新型环形印刷网板
CN115320233B (zh) * 2022-09-30 2023-12-12 何军静 一种基于掩膜版印刷的喷头

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1117838B (it) 1977-07-12 1986-02-24 Miotto Sergio Procedimento di decorazione serigrafica policroma di piatti e macchina per effettuare il procedimento
EP0749844A1 (de) * 1995-06-19 1996-12-27 Riso Kagaku Corporation Schablonendruckmaschine
EP0836555A1 (de) 1995-07-06 1998-04-22 Omis Due S.P.A. Siebdruckmaschine mit rotierendem siebzylinder
EP0909644A1 (de) 1997-10-10 1999-04-21 Maker di Vincenzi, Maurizio System zur Dekoration eines Gegenstandes
WO1999041081A1 (en) * 1998-02-13 1999-08-19 Stork Textile Printing Group B.V. Device and method for applying a medium to a substrate, system having a plurality of such devices, and use of such device, method and system
EP0974458A1 (de) 1998-07-18 2000-01-26 Rob Borgmann Siebdruckverfahren zum Bedrucken von ebenflächigen Gegenständen, insbesondere Glasscheiben, mit einem Dekor und Vorrichtung zur Durchführung des Verfahrens
EP1157832A1 (de) 2000-05-15 2001-11-28 Tecno-Italia S.R.L. Druckvorrichtung für Siebdruckmaschinen.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1117838B (it) 1977-07-12 1986-02-24 Miotto Sergio Procedimento di decorazione serigrafica policroma di piatti e macchina per effettuare il procedimento
EP0749844A1 (de) * 1995-06-19 1996-12-27 Riso Kagaku Corporation Schablonendruckmaschine
EP0836555A1 (de) 1995-07-06 1998-04-22 Omis Due S.P.A. Siebdruckmaschine mit rotierendem siebzylinder
EP0909644A1 (de) 1997-10-10 1999-04-21 Maker di Vincenzi, Maurizio System zur Dekoration eines Gegenstandes
WO1999041081A1 (en) * 1998-02-13 1999-08-19 Stork Textile Printing Group B.V. Device and method for applying a medium to a substrate, system having a plurality of such devices, and use of such device, method and system
EP0974458A1 (de) 1998-07-18 2000-01-26 Rob Borgmann Siebdruckverfahren zum Bedrucken von ebenflächigen Gegenständen, insbesondere Glasscheiben, mit einem Dekor und Vorrichtung zur Durchführung des Verfahrens
EP1157832A1 (de) 2000-05-15 2001-11-28 Tecno-Italia S.R.L. Druckvorrichtung für Siebdruckmaschinen.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004061347A2 (en) * 2003-01-07 2004-07-22 Loughborough University Enterprises Limited Method and apparatus for transferring material to a substrate
WO2004061347A3 (en) * 2003-01-07 2004-12-02 Univ Loughborough Method and apparatus for transferring material to a substrate
EP1598188A1 (de) * 2004-05-18 2005-11-23 José Luis Novo Rodriguez Vorrichtung zum Siebdrucken von keramischen Gut
WO2006024552A1 (en) * 2004-09-03 2006-03-09 Sichenia Gruppo Ceramiche S.P.A. Machine for wet screen printing of substantially flat elements, particularly ceramic articles
EP1726422A2 (de) * 2005-05-23 2006-11-29 Paola Ferrari Rollensieb zur Dekoration von Fliesen mit Flüssigstrahldüsen
EP1726422A3 (de) * 2005-05-23 2009-10-21 Paola Ferrari Rollensieb zur Dekoration von Fliesen mit Flüssigstrahldüsen
WO2007091136A1 (en) * 2006-02-07 2007-08-16 System S.P.A. An apparatus for decorating ceramic products
DE102011015456A1 (de) * 2011-03-30 2012-10-04 Thomas Walther Siebdruckverfahren und dazu gehörige Vorrichtung
CN108749287A (zh) * 2018-05-30 2018-11-06 佛山领新信息科技有限公司 一种玻璃无网丝印机

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Publication number Publication date
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