EP3370969A1 - Dispositif de polymérisation d'encres et/ou peintures dans une atmosphère inerte - Google Patents

Dispositif de polymérisation d'encres et/ou peintures dans une atmosphère inerte

Info

Publication number
EP3370969A1
EP3370969A1 EP16822523.3A EP16822523A EP3370969A1 EP 3370969 A1 EP3370969 A1 EP 3370969A1 EP 16822523 A EP16822523 A EP 16822523A EP 3370969 A1 EP3370969 A1 EP 3370969A1
Authority
EP
European Patent Office
Prior art keywords
slot
movement member
support
inert gas
chamber
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
EP16822523.3A
Other languages
German (de)
English (en)
Other versions
EP3370969B1 (fr
Inventor
Alberto MAIANO
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.)
Uv Ray Srl
Original Assignee
Uv Ray Srl
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
Priority claimed from ITUB2015A005248A external-priority patent/ITUB20155248A1/it
Priority claimed from ITUB2015A009365A external-priority patent/ITUB20159365A1/it
Application filed by Uv Ray Srl filed Critical Uv Ray Srl
Publication of EP3370969A1 publication Critical patent/EP3370969A1/fr
Application granted granted Critical
Publication of EP3370969B1 publication Critical patent/EP3370969B1/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
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • 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
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers

Definitions

  • the present invention relates to a device for the polymerization of inks and/or paints.
  • a device for the polymerization of inks and/or paints can be used in printing machines and/or coating machines employing inks, paints, lacquers and the like which are fixed through polymerization, i.e. a chemical reaction which is able to change the molecular structure of components.
  • printing machines and/or coating machines for example but not limited to graphic art printing machines using ultraviolet light sources to cause the polymerization of the ink, paint or lacquer used.
  • ultraviolet light sources are used for the polymerization of inks, paints and the like.
  • This type of printing has the advantage of being used on many supports: paper, cardboard, plastic, aluminum, and others. It allows to use water, UV or solvent colors, at a printing speed.
  • UV reactive inks further speeds up the printing process by including quick drying thereof by exposure to ultraviolet light.
  • a device for the polymerization of inks and/or paints of the type known from the prior art comprises a polymerization chamber.
  • a polymerization chamber has an inlet slot for inserting a printed and/or painted support and an outlet slot for ejecting the support once the polymerization has been completed.
  • the chamber is saturated with inert gas, preferably nitrogen.
  • the device comprises filling means associated with the chamber and configured to introduce inert gas into the chamber.
  • the device comprises radiation means associated with the chamber and configured to radiate the support with electromagnetic radiation to cause the polymerization of a paint and/or ink layer present on the support.
  • Such radiation means comprise a UV lamp.
  • the chamber has at least one UV radiation-transparent wall.
  • the support In use, the support is inserted into the chamber through the inlet slot so that one painted and/or inked side is irradiated by UV light. The support is then removed through the outlet slot.
  • the camber of the known device is not air-tight.
  • the solution consists in increasing the nitrogen introduced into the chamber to compensate for such infiltrations, thereby enormously increasing the consumption of this gas and the costs associated therewith.
  • WO 96/34700 A1 describes a method and an apparatus for hardening a layer of ink, paint, adhesive or silicone on a substrate of paper, plastic, wood or metal.
  • the apparatus comprises a housing, which is open in the direction of a transport body of the substrate and covers the substrate while leaving free inlet and outlet openings of the substrate in/from the housing.
  • the apparatus further comprises a UV lamp and a reflector, both arranged in the housing, the reflector being configured to direct the UV rays emitted by the UV lamp on the substrate passing into the housing.
  • a gas conduit introduces gas into the housing.
  • the apparatus further comprises gas recovery nozzles positioned adjacent to the inlet and/or outlet openings of the housing and adapted to direct the gas onto the substrate in input and in output in/from the housing, respectively.
  • Each nozzle has a body, which is glued and screwed to the housing, and an opening adjustable in width by means of a screw.
  • the technical task underlying the present invention is to propose a device for the polymerization of inks and/or paints according to the present invention which overcomes the above drawbacks of the prior art.
  • the device according to the present invention comprises a polymerization chamber.
  • a polymerization chamber has an inlet slot for inserting a printed and/or painted support.
  • the chamber also has an outlet slot for ejecting such a support.
  • Filling means are associated with the chamber. Such filling means are configured to introduce inert gas into the chamber itself.
  • Radiation means are further associated with the chamber.
  • the radiation means are configured to radiate the support with an electromagnetic radiation, so as to cause the polymerization of a paint and/or ink layer present on the support.
  • a first member for moving the inert gas is placed close to the inlet slot.
  • a movement member is configured to move the inert gas from the interior of the chamber towards the inlet slot.
  • the first movement member has a side surface and a longitudinal development axis and is rotatable about such a longitudinal development axis in such a direction of rotation that the speed of the side surface close to the support has an opposite direction with respect to the feeding speed of the support.
  • the first movement member allows the dragging effect of the support to be counterbalanced, which tends to drag air from the outside to the interior of the chamber. Therefore, a small amount of inert gas present into the chamber is ejected but at the same time, the entry of air from the outside is strongly limited. The result of these two effects is still a net reduction in the consumption of nitrogen compared to that found in the known solution of the prior art.
  • the device may further comprise a second movement member placed close to the outlet slot.
  • a second movement member is configured to move the inert gas from the outlet slot to the interior of the chamber.
  • the second movement member has a side surface and a longitudinal development axis and is rotatable about such a longitudinal development axis in such a direction of rotation that the speed of the side surface close to the support has an opposite direction with respect to the feeding speed of the support.
  • the amount of nitrogen escaping from the outlet slot dragged by the support is decreased. Therefore, a further reduction in the consumption of nitrogen is achieved.
  • the filling means mentioned above can further comprise at least one inert gas distribution member placed close to the inlet slot and/or the outlet slot.
  • a distribution member is configured to evenly distribute the inert gas along at least part of the extension of the slot.
  • the distribution member close to the inlet slot or the outlet slot collaborates with the movement member already present close to the slot.
  • a constant flow of nitrogen evenly distributed close to the support is ensured. Any oxygen residues are thus eliminated, improving the printing quality.
  • FIG. 1 is a schematic side view of a device for the polymerization of inks and/or paints according to the present invention.
  • figure 2 is a plan view of the device in figure 1 with some parts removed to better show others.
  • reference numeral 1 indicates a device for the polymerization of inks and/or paints according to the present invention.
  • Device 1 comprises a polymerization chamber 2 which has an inlet slot 3 for inserting a printed and/or painted support "S" and an outlet slot 4 for ejecting support “S".
  • support “S” may be schematized as a continuous sheet having a printed surface "ST”.
  • Such a support “S” is movable along a feeding direction "A".
  • the feeding direction "A" is perpendicular to both the inlet slot 3 and to the outlet slot 4. It should be noted, however, that since support "S” is not part of the present invention, it can still be of any type.
  • device 1 comprises movement means (not shown) of support “S", such movement means comprise at least one motorized roller.
  • movement means comprise at least one motorized roller.
  • a plurality of further rollers 6 are placed underneath support “S", in particular on the side opposite to the printed surface "ST”, so as to support it.
  • device 1 comprises filling means 7 associated with chamber 2.
  • Such filling means 7 are configured to introduce inert gas, preferably nitrogen, into chamber 2.
  • the filling means 7 will be described in detail in a following part of the present description.
  • Device 1 further comprises radiation means 8 associated with chamber 2.
  • radiation means 8 are configured to radiate support “S” with an electromagnetic radiation to cause the polymerization of a paint and/or ink layer present on support "S".
  • the radiation means 8 operate in a radiation area 2a of chamber 2.
  • the radiation means 8 comprise a UV lamp 9. Such a lamp 9 faces the printed surface "S" of support "S". The power of lamp 9 is calibrated according to the feeding speed of support "S", so as to provide the right amount of UV radiation to cause a complete polymerization on support S.
  • the radiation means 8 may comprise a mirror 10 placed behind lamp 9, capable of concentrating the UV radiation of lamp 9 on support "S", thereby allowing the use of a low-power lamp 9. Further details about a particularly advantageous embodiment of the radiation means 8 are found in patent application IT 10 2015 902331688 to the same Applicant. Such radiation means may also be employed in the device 1 disclosed in the present description.
  • the filling means 7 comprise at least one inert gas distribution member 1 1 placed close to the inlet slot 3 and/or the outlet slot 4.
  • the distribution member 1 1 is configured to evenly distribute the inert gas along at least part of the extension of slot 3, 4 to which it is applied.
  • extension means the prevailing dimension of each of slots 3, 4. As is shown in the accompanying drawings, such a prevailing dimension substantially extends in a direction perpendicular to the feeding direction "A" support "S” and substantially parallel to the plane of support "S" itself.
  • the distribution member 1 1 is configured to evenly distribute the inert gas along at least 60% of the extension of slot 3, 4, and preferably as much as possible along 100% of the extension of slot 3, 4.
  • device 1 preferably comprises a pair of distribution members 1 1 , placed at the inlet slot 3 and at the outlet slot 4, respectively.
  • the distribution members 1 1 are placed outside the radiation area 2a of chamber 2.
  • the radiation zone 2a is placed between the distribution members 1 1 .
  • the distribution member 1 1 has a cavity 12 placed in fluid communication with a source of inert gas.
  • a source of inert gas may be a nitrogen cylinder, commercially available.
  • Cavity 12 has a plurality of first nozzles 13, each placed close to slot 3, 4. The first nozzles 13 are substantially aligned, thereby defining a dispensing line substantially parallel to slot 3, 4.
  • cavity 12 is a tube, closed at the ends, on the side surface of which holes are obtained for defining the first nozzles 13 already mentioned.
  • the distribution member 1 1 further comprises a conduit 14 placed in fluid communication with a source of inert gas.
  • the cavity 12 mentioned above is placed in fluid communication with the source thereof through conduit 14.
  • conduit 14 is inserted into cavity 12 and is placed in fluid communication with cavity 12 so as to saturate it with the inert gas.
  • conduit 14 has a plurality of second nozzles 15 opening into cavity 12.
  • the second nozzles 15 have a smaller passage area than a passage area of the first nozzles 12.
  • "passage area” means the total area of the first 13 and second nozzles 1 5, respectively. Accordingly, a greater area of the second nozzles 15 can be obtained by increasing the number of second nozzles 15 with respect to the first nozzles 13 with the same section of each nozzle. Alternatively or in combination, the size of each first nozzle 15 may also be increased with respect to a single first nozzle 13.
  • Device 1 comprises at least a first movement member 19 for the inert gas.
  • a first movement member 19 is placed close to the inlet slot 3, and is configured to move the inert gas from the interior of chamber 2 towards the inlet slot 3.
  • the first movement member 19 is placed between the distribution member 1 1 close to the inlet slot 3 and the inlet slot 3 itself.
  • the first movement member 19 is inserted into a containment compartment 2b of chamber 2.
  • a partition 22 separates the containment compartment 2b from the rest of chamber 2.
  • Such a partition 22 is therefore placed between the first movement member 19 and the distribution member 1 1 closest to the inlet slot 3.
  • the first movement member 19 has the function of countering the action of support "S", which would tend to bring air from the external environment towards the interior of chamber 2.
  • the first movement member 19 has a prismatic shape, preferably cylindrical.
  • Such a first movement member 19 has a side surface 20 and a longitudinal development axis "L1 " which, in particular, is an axis of symmetry of said first movement member 19. Accordingly, the side surface 20 is symmetrical with respect to the longitudinal development axis "L1 ".
  • the longitudinal development axis "L1 " is in particular oriented along a direction substantially parallel with respect to the outlet slot 4.
  • the first movement member 19 is rotatable with respect to the longitudinal development axis "L1 " thereof.
  • the direction of rotation of the first movement member 19 is such that the speed of the side surface 20 close to support "S" has an opposite direction with respect to the feeding speed of support "S" itself. In this way, the air which would tend to penetrate into chamber 2 through the inlet slot 3 is stopped by a flow of inert gas generated by the rotation of the first movement member 19.
  • the side surface 20 of the first movement member 19 has an area proximal to the inlet slot 3, through which support "S" entering chamber 2 passes.
  • the side surface 20 is movable approaching the inlet slot 3 along such a proximal area.
  • the side surface 20 has a plurality of bumps 21 .
  • bumps 21 have the function of triggering a turbulent motion in the vicinity of the side surface 20 of the first movement member 19.
  • bumps 21 may consist of recesses obtained on the side surface 20 of the first movement member 19.
  • the rotation of the movement member 19 together with the presence of said partition 22 causes the onset of a high-pressure area inside the containment compartment 2b of chamber 2.
  • device 1 also comprises a second movement member 16 for the inert gas.
  • a second movement member 16 is placed close to the outlet slot 4, and is configured to move the inert gas from the outlet slot 4 towards the interior of chamber 2.
  • the second movement member 16 counteracts the action of support "S”, which would tend to drag the inert gas therewith out of chamber 2.
  • the second movement member 16 counteracts the action of support "S”, which would tend to drag the inert gas therewith out of chamber 2.
  • the second movement member 16 is made in a similar way to the first movement member 19 and therefore has a prismatic shape, preferably cylindrical.
  • the second movement member 16 has a side surface 17, similar to the side surface 20 of the first movement member 19 and a longitudinal development axis "L2".
  • the longitudinal development axis "L2" is an axis of symmetry of the second movement member 16. Accordingly, the side surface 17 is symmetrical with respect to the longitudinal development axis "L2".
  • the longitudinal development axis "L2" is in particular oriented along a direction substantially parallel with respect to the outlet slot 4.
  • the side surface 17 has a plurality of bumps 18, 21 similar to bumps 21 of the side surface 20 of the first movement member 19.
  • bumps similar to bumps 21 of the first movement member 19, have the function of triggering a turbulent motion in the vicinity of the side surface 17 of the second movement member 16.
  • bumps 18 may consist of recesses obtained on the side surface 17.
  • the second movement member 16 is rotatable with respect to the longitudinal development axis "L2" thereof, similar to the longitudinal axis "L1 " of the first movement member 19 and preferably parallel thereto.
  • the direction of rotation of the second movement member 16 is such that the speed of the side surface 17 thereof close to support "S” has an opposite direction with respect to the feeding speed of support "S” itself. In this way, the inert gas which would tend to escape from chamber 2 through the outlet slot 4 is returned back by the rotation of the second movement member 16.
  • the side surface 17 of the second movement member 16 has an area proximal to the outlet slot 4, through which support "S" exiting from chamber 2 passes.
  • the side surface 17 is movable away from the outlet slot 4 along such a proximal area.
  • the side surface 17 of the second movement member 16 has an area proximal to the outlet slot 4.
  • the side surface 17 of the second movement member 16 is movable away from the outlet slot 4 along such a proximal area.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

La présente invention concerne un dispositif (1) pour la polymérisation d'encres et/ou peintures, qui comprend une chambre de polymérisation (2) comportant une fente d'entrée (3) pour insérer un support imprimé et/ou peint (S) et une fente de sortie (4) pour éjecter le support (S); des moyens de remplissage (7) associés à la chambre (2) pour introduire un gaz inerte dans la chambre (2); des moyens d'irradiation (8) associés à la chambre (2) pour irradier le support (S) avec un rayonnement électromagnétique et causer la polymérisation d'une couche de peinture et/ou d'encre présente sur le support (S); un premier élément de déplacement (19) du gaz inerte placé à proximité de la fente d'entrée (3) pour déplacer le gaz inerte de l'intérieur de la chambre (2) vers la fente d'entrée (3).
EP16822523.3A 2015-11-03 2016-11-02 Dispositif de polymérisation d'encres et/ou peintures dans une atmosphère inerte Active EP3370969B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITUB2015A005248A ITUB20155248A1 (it) 2015-11-03 2015-11-03 Dispositivo per la polimerizzazione di inchiostri e/o vernici in atmosfera inerte
ITUB2015A009365A ITUB20159365A1 (it) 2015-12-22 2015-12-22 Dispositivo per la polimerizzazione di inchiostri e/o vernici in atmosfera inerte
PCT/IB2016/056587 WO2017077460A1 (fr) 2015-11-03 2016-11-02 Dispositif de polymérisation d'encres et/ou peintures dans une atmosphère inerte

Publications (2)

Publication Number Publication Date
EP3370969A1 true EP3370969A1 (fr) 2018-09-12
EP3370969B1 EP3370969B1 (fr) 2020-07-08

Family

ID=57737760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16822523.3A Active EP3370969B1 (fr) 2015-11-03 2016-11-02 Dispositif de polymérisation d'encres et/ou peintures dans une atmosphère inerte

Country Status (2)

Country Link
EP (1) EP3370969B1 (fr)
WO (1) WO2017077460A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6677857B2 (ja) * 2018-01-30 2020-04-08 京セラ株式会社 光照射装置および印刷装置
ES2938036T3 (es) * 2018-07-27 2023-04-04 Kyocera Corp Dispositivo de impresión y dispositivo de irradiación de luz
WO2020067158A1 (fr) * 2018-09-27 2020-04-02 京セラ株式会社 Dispositif de photo-irradiation et dispositif d'impression

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8802431L (sv) * 1988-06-28 1989-12-29 Svecia Silkscreen Maskiner Ab Torkanlaeggning med uv-ljus alstrande organ
US6185840B1 (en) * 1995-05-04 2001-02-13 Noelle Gmbh Method and apparatus for hardening a layer on a substrate
WO2003020522A1 (fr) * 2001-08-29 2003-03-13 Eltosch Thorsten Schmidt Gmbh Système de séchage par rayonnement
US7175712B2 (en) * 2003-01-09 2007-02-13 Con-Trol-Cure, Inc. Light emitting apparatus and method for curing inks, coatings and adhesives

Also Published As

Publication number Publication date
WO2017077460A1 (fr) 2017-05-11
EP3370969B1 (fr) 2020-07-08

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