EP4028261A1 - Procédé et dispositif de finition d'épreuves - Google Patents

Procédé et dispositif de finition d'épreuves

Info

Publication number
EP4028261A1
EP4028261A1 EP20771457.7A EP20771457A EP4028261A1 EP 4028261 A1 EP4028261 A1 EP 4028261A1 EP 20771457 A EP20771457 A EP 20771457A EP 4028261 A1 EP4028261 A1 EP 4028261A1
Authority
EP
European Patent Office
Prior art keywords
printing material
radiation
transport path
pressure roller
transport
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
EP20771457.7A
Other languages
German (de)
English (en)
Other versions
EP4028261C0 (fr
EP4028261B1 (fr
Inventor
Georg Barth
André PANITZKE
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.)
KAMA GmbH
Original Assignee
KAMA GmbH
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 KAMA GmbH filed Critical KAMA GmbH
Publication of EP4028261A1 publication Critical patent/EP4028261A1/fr
Application granted granted Critical
Publication of EP4028261C0 publication Critical patent/EP4028261C0/fr
Publication of EP4028261B1 publication Critical patent/EP4028261B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus
    • B41F16/0006—Transfer printing apparatus for printing from an inked or preprinted foil or band
    • B41F16/002—Presses of the rotary type
    • B41F16/0033—Presses of the rotary type with means for applying print under pressure only, e.g. using pressure sensitive adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/002—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/002—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink
    • B41F19/004—Apparatus or machines for carrying out printing operations combined with other operations with means for applying specific material other than ink with means for applying adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints

Definitions

  • the invention relates to improved methods and devices for print finishing.
  • Print finishing refers to a change in the surface of a substrate such as paper, cardboard, etc. through an additional coating. This gives the paper either a certain gloss, a structure or predefined effects that it does not have in its original, unprocessed form. Print finishing results in a change in the paper surface that makes the printed product as a whole more durable, on the one hand, by protecting it against wear, and on the other, by enhancing its appearance or touching it, or contributes to the sale of the products or services shown therein.
  • Finishing processes can be based on coating, joining, reshaping or separating the printing material.
  • the processes in which the finishing is carried out by joining include lamination, lamination and film transfer.
  • Foil transfer comprises finishing processes in which transfer layers are detached from a carrier foil and transferred to the printing material. This group of processes includes hot foil stamping, the
  • Hot foil stamping Under the effect of pressure, temperature and contact time, transfer layers of a stamping foil are transferred to the material with the help of an embossing stamp, which at the same time undergoes a permanent change in shape.
  • Hot foil stamping takes place as plan stamping with a tool or relief stamping with a die and male mold. Either flat dies or embossing rollers, which are heated for the film transfer, are used as embossing tools.
  • the temperature depends on the stamping foil used, the printing material and the type of machine and is between 80 ... 220 ° C.
  • the stamping foil consists of several layers.
  • One or more transfer layers are either applied directly to a carrier film made of polyester, or the transfer layers are applied to a separating layer located on the carrier film, which melts under the action of heat and thus releases the transfer layers.
  • the transfer layers comprise an optically effective layer and an adhesive layer (reactivatable adhesive).
  • the adhesive layer provides a permanent and smudge-proof connection between the optically effective layer and the printing material. Color pigments, metal pigments and plastics can be used for the optically effective layer, which leads to very different visual effects.
  • cold foil finishing is implemented, for example, with two additional printing units in an offset printing machine.
  • a special adhesive is applied to the substrate using a standard printing forme. Since the characteristics of offset printing come into play, small raster elements and fine line widths can be transferred.
  • a second printing unit is equipped with a film transfer device. The film is fed from the unwinding station into the printing gap between the blanket cylinder and the printing cylinder and brought into contact with the printing material.
  • the film consists of several layers that are located on a carrier film.
  • the color is provided by an aluminum layer and a protective lacquer layer, the coloring of which influences the color impression.
  • the transfer layers on the substrate remain chicht by adhesion of an adhesive layer with the printed adhesive S adhere.
  • the carrier film is then wound up again.
  • the visual effect of cold foils is similar to that of stamping foils. However, there is no haptic effect because there is no deformation or noticeable surface change.
  • Cold foils are used in the production of various print products, for example in label printing, on high-quality packaging or in commercial printing.
  • two additional printing units and the film transfer station are required for the cold foil transfer.
  • One object of the present invention is to further develop and improve the known methods and devices for print finishing, in particular for cold foil transfer.
  • a process for print finishing in which a printing material and a transfer film with a transfer layer are provided, the printing material is moved along a transport path at a transport speed, and a radiation-curing plastic is applied to the printing material during the movement of the printing material in a first section of the transport path is applied, after the application of the radiation-curing plastic in a second section of the transport path, the printing material is irradiated, while at the same time the transfer film is pressed onto the printing material and moved with it along the transport path, and when leaving the second section of the transport path, the transfer film is removed from the printing material becomes.
  • a Radiation-curing plastic used as an adhesive which is initially in the form of a resin, ie in liquid or pasty form and has no or virtually no adhesive strength. Only when this resin is irradiated with radiation of a specific wavelength does it become sticky and then harden. In this way, the transfer layer is peeled off from the transfer film in the areas in which the surface of the printing material has the resin of the radiation-curing plastic, while the transfer layer remains on the transfer film in the other areas.
  • nozzles of a printing device that is used to apply the resin to the printing material can no longer clog because the resin applied to the printing material is not irradiated until after printing.
  • the printing material is moved horizontally and the transfer film is guided in the second area of the transport path around a partial circumference of a pressure roller that is pressed onto the printing material.
  • This has advantages in particular for the print finishing of printing materials in the form of individual sheets - in contrast to the roll-to-roll process.
  • the printing substrate and the transfer film only touch each other in a very short area according to the invention, so that a relative displacement due to transport routes of different lengths cannot have a negative effect on the result of the finishing.
  • the pressure roller rotates with a Peripheral speed is moved, which is equal to the transport speed of the printing material.
  • the pressure roller is provided as a radiation-permeable hollow body and a radiation source is provided in the pressure roller.
  • a radiation source is provided in the pressure roller.
  • the irradiation can either take place beforehand, so that the hardening process of the resin begins while the pressure roller is acting, or afterwards. If, however, the pressure roller is a radiation-permeable hollow body in which the radiation source is arranged, then the pressing of the film onto the printing material and the curing of the resin of the radiation-curing plastic coincide, and the action of the radiation occurs while the pressure roller is being pressed through the light-permeable hollow body.
  • the pressure roller is pressed onto the transport path when a printing material is moved underneath it and is raised when no printing material is moved underneath it. In this way, a paper jam, which can arise as a result of the collision of the printing material with the pressure roller that is pressed onto the transport path, can be avoided.
  • a device for print finishing which comprises: a transport device for moving a printing material along a transport path, a printing device for Application of a radiation-curing plastic to the printing material in a first section of the transport path, a film feed device for feeding transfer film to a surface of the printing material in a second section of the transport path, and a
  • Irradiation device for curing the radiation-curing plastic in the second section of the transport path, which comprises at least one radiation source.
  • the transport device can have, for example, a belt conveyor on which the printing material is transported in a lying position.
  • the transport device can have, for example, a belt conveyor on which the printing material is transported in a lying position.
  • the suction belt conveyor can for example have a perforated conveyor belt guided around deflection rollers, a so-called suction box being arranged between the deflection rollers, in the interior of which a vacuum is generated by means of a pump.
  • the film feed device can, for example, have at least one decoiler and one reel-up, as well as a pressure roller arranged between them, around which the transfer film is guided and which is pressed onto the printing material.
  • the pressure roller can be moved back and forth between a lower position in which it presses on the transport path and an upper position in which it is lifted off the transport path. This makes it possible for the pressure roller to be pressed onto the transport path when a printing material is moved underneath it and to be raised when no printing material is moved underneath it. This can a paper jam, which can occur due to the collision of the printing material with the pressure roller pressed on the transport path, is avoided.
  • Pressure roller and reel-up, at least one tension roller for producing a constant web tension is arranged in the transfer film.
  • the pressure roller is designed as a radiation-permeable hollow body and the at least one radiation source is arranged in the pressure roller.
  • Radiation source comprises at least one movably arranged diaphragm for directing the beam generated by the radiation source.
  • This screen can, for example, comprise a hollow cylindrical body with a slit-shaped screen opening which is arranged inside the pressure roller so as to be rotatable about its longitudinal axis.
  • the radiation-hardening plastic used is plastic that can be hardened by IR radiation
  • the radiation-hardening plastic used is plastic that can be hardened by UV radiation
  • the transport device 2 has a suction belt conveyor 21 on which the printing material 1 is held by means of negative pressure.
  • the suction belt conveyor 21 has a perforated conveyor belt guided around deflection rollers, a suction box being arranged between the deflection rollers, in the interior of which a vacuum is generated by means of a pump 22.
  • a printing device 3 for applying a radiation-curing plastic to the printing material 1 is arranged in a first section of the transport path.
  • the printing device 3 is designed in the manner of an inkjet printer, in which instead of a printing ink, a resin of a radiation-curing plastic is applied to the surface of the printing material 1, while the printing material 1 is moved by the transport device 2 under the printing device 3.
  • the adhesive is activated in order to achieve dimensional stability of the printed image (so-called "pinning").
  • a film feed device 4 for feeding transfer film to a surface of the printing material 1 is arranged downstream of the printing device 3, in a second section of the transport path, also above the transport device 2, a film feed device 4 for feeding transfer film to a surface of the printing material 1 is arranged.
  • the film feed device 4 comprises a decoiler 41, a reel 43 and a pressure roller 42 arranged between the decoiler 41 and the reel 43.
  • the transfer foil 6 is guided around the pressure roller 42 and pressed onto the printing material 1.
  • the pressure roller 42 is by means of a yoke 45 and a pneumatic cylinder 46 engaging the yoke 45 between a lower position, in which the pressure roller 42 presses on the transport path, and an upper position, in which the pressure roller 42 is lifted from the transport path, back and forth moveable.
  • the device further comprises an irradiation device 5 with a UV lamp as the radiation source 51 for curing the radiation-curing Plastic.
  • the pressure roller 42 is designed as a radiation-permeable hollow body and the UV lamp 51 is arranged in the pressure roller 42.
  • the irradiation device 5 also has a movably arranged diaphragm 52 for directing the from the
  • Radiation source 51 includes the generated beam, which is designed as a hollow cylindrical body with a slot-shaped aperture opening, which is rotatable inside the pressure roller 42 about the longitudinal axis of the pressure roller 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Decoration By Transfer Pictures (AREA)

Abstract

La présente invention concerne des procédés et des dispositifs améliorés pour la finition d'épreuves, en particulier pour le transfert de films. Selon l'invention, le dispositif de finition d'épreuves comprend un dispositif de transport servant à déplacer un matériau imprimé le long d'un trajet de transport, un dispositif d'impression pour appliquer une matière plastique durcissable par rayonnement sur le matériau imprimé dans une première section du trajet de transport, un dispositif d'alimentation en film pour fournir un film de transfert à une surface du matériau imprimé dans une seconde section du trajet de transport et un dispositif d'irradiation pour durcir la matière plastique durcissable par rayonnement dans la seconde section du trajet de transport, qui comprend au moins une source de rayonnement.
EP20771457.7A 2019-09-09 2020-08-28 Procédé et dispositif de finition d'épreuves Active EP4028261B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019124105.7A DE102019124105A1 (de) 2019-09-09 2019-09-09 Verfahren und Vorrichtung zur Druckveredelung
PCT/EP2020/074055 WO2021047922A1 (fr) 2019-09-09 2020-08-28 Procédé et dispositif de finition d'épreuves

Publications (3)

Publication Number Publication Date
EP4028261A1 true EP4028261A1 (fr) 2022-07-20
EP4028261C0 EP4028261C0 (fr) 2023-12-06
EP4028261B1 EP4028261B1 (fr) 2023-12-06

Family

ID=72473503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20771457.7A Active EP4028261B1 (fr) 2019-09-09 2020-08-28 Procédé et dispositif de finition d'épreuves

Country Status (5)

Country Link
EP (1) EP4028261B1 (fr)
JP (1) JP7446411B2 (fr)
DE (1) DE102019124105A1 (fr)
IL (1) IL291132A (fr)
WO (1) WO2021047922A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114872432B (zh) * 2022-04-22 2022-11-29 浙江长恒包装有限公司 一种自动化热压转印及覆膜一体设备
CN218841178U (zh) * 2022-06-15 2023-04-11 上海睿途新材料科技有限公司 一种冷烫膜输送装置

Family Cites Families (24)

* Cited by examiner, † Cited by third party
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JPH0551147A (ja) * 1991-08-22 1993-03-02 Ricoh Co Ltd 電子写真装置の用紙搬送装置
JPH1071648A (ja) 1996-08-30 1998-03-17 Nisca Corp 情報記録媒体のオーバーコート装置
JPH11170684A (ja) * 1997-12-12 1999-06-29 Ueno Hiroshi 曲面体への印刷方法及び曲面印刷体
US6263796B1 (en) 1997-12-23 2001-07-24 Datacard Corporation Closed loop control for an image transfer section of a printer
AU2003217351B2 (en) * 2002-02-08 2007-01-04 Gerber Scientific Products, Inc. Method and apparatus for making signs having an adhesive
ES2511741T5 (es) * 2003-11-14 2018-06-06 Lappe Kurt Procedimiento y dispositivo para impresión combinada
JP2008023945A (ja) 2006-07-25 2008-02-07 Ryobi Ltd 枚葉印刷機
JP5284603B2 (ja) 2007-05-31 2013-09-11 株式会社小森コーポレーション 枚葉印刷機
JP5009094B2 (ja) * 2007-08-28 2012-08-22 株式会社タイカ 水圧転写方法、水圧転写装置及び水圧転写品
JP5095331B2 (ja) * 2007-09-20 2012-12-12 リョービ株式会社 印刷用紙への転写方法及び転写装置
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JP2009279868A (ja) * 2008-05-23 2009-12-03 Duplo Seiko Corp 箔転写方法及び箔転写装置
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JP6542711B2 (ja) * 2016-05-27 2019-07-10 株式会社ミヤコシ 電子写真方式枚葉両面印刷装置
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Also Published As

Publication number Publication date
EP4028261C0 (fr) 2023-12-06
WO2021047922A1 (fr) 2021-03-18
DE102019124105A1 (de) 2021-03-11
IL291132A (en) 2022-05-01
JP2022547924A (ja) 2022-11-16
JP7446411B2 (ja) 2024-03-08
EP4028261B1 (fr) 2023-12-06

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