EP3843999A1 - Procédé permettant d'ajuster une densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application sur un substrat de manière à le recouvrir - Google Patents

Procédé permettant d'ajuster une densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application sur un substrat de manière à le recouvrir

Info

Publication number
EP3843999A1
EP3843999A1 EP19752500.9A EP19752500A EP3843999A1 EP 3843999 A1 EP3843999 A1 EP 3843999A1 EP 19752500 A EP19752500 A EP 19752500A EP 3843999 A1 EP3843999 A1 EP 3843999A1
Authority
EP
European Patent Office
Prior art keywords
substrate
coating material
question
application device
layer thickness
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
EP19752500.9A
Other languages
German (de)
English (en)
Other versions
EP3843999B1 (fr
Inventor
Steven Flemming
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP3843999A1 publication Critical patent/EP3843999A1/fr
Application granted granted Critical
Publication of EP3843999B1 publication Critical patent/EP3843999B1/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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/11—Pre-inking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/30—Measuring or controlling the consumption of ink
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/51—Marks on printed material for colour quality control

Definitions

  • the invention relates to a method for setting a layer thickness of an opaque coating material to be applied by an application device to a substrate according to the preamble of claim 1.
  • a method for controlling the thickness of a color film is known from US 2015/0 090 136 A1, the color film being applied to a printed substrate in one
  • a lithographic printing machine which includes a plurality of printing units, each printing unit including a blanket cylinder, a plate cylinder, a take-off roller and an inking unit, comprising: (a) filling the ink cylinder in one or more of the plurality of printing units, the filling comprising the following steps includes: arranging all printing units of the printing press in a non-printing position, each printing unit including a blanket cylinder, moving the take-off roller in the one or more printing units of the plurality of printing units into contact with the blanket cylinder of the printing unit and then driving the inking unit, the plate cylinder , the blanket cylinder and the take-off roller and thereby transferring ink from the inking unit to the plate cylinder, from the plate cylinder to the blanket cylinder and from the blanket cylinder to the take-off roller, (b) moving the take-off roller out of contact with the blanket cylinder of the printing unit in one or more ren printing units of the plurality of printing units, (c) arranging the one or more printing units in the
  • Dampening solution supply in planographic printing machines by measuring the control marks that are also printed and subsequently evaluating the measured values, whereby the measurement values for determining the color density and the dampening are obtained at the same control marks, signals are created which are used for evaluating the moisture and color density values, then a Calculation of the existing moisture and ink density values and a comparison with specified target values within defined tolerance limits is carried out by a microcomputer, separate control signals for the control of inking and dampening units being generated by forming difference signals between target and actual values.
  • DE 10 2007 061 397 A1 describes a printing press with a device for transferring imaging layers from a transfer film to sheets with at least one application device for image-wise coating of the sheets with an adhesive and with a coating device downstream thereof for transferring the imaging layers from the Transfer film on the sheet is known, a measuring system directed towards the sheet being arranged between the application device and the coating device, the opacity of the adhesive layer being measurable with the measuring system and / or control fields and / or measuring strips outside the printed image being detectable with the measuring system.
  • Density values that lie outside a specified tolerance range the calculation of the printing area portion and the resulting color knife gap is carried out iteratively again and the adjustment of the color knife is carried out and these steps are repeated until the difference between the existing and the required optical density is within the specified tolerance range.
  • DE 10 2014 01 1 151 A1 discloses a method for color control in printing machines with a computer by detecting color areas on one
  • the surface to be printed is a printing material
  • the printing material is coated with opaque white
  • the color measuring device detects several color measurement values of opaque white
  • the computer compares the recorded color measurement values of the opaque white with one another or against a reference color value of the opaque white and those determined in the comparison
  • Printing material with color measuring fields is overprinted, the overprinted
  • Reproduction copies of a printing press in which a substrate that appears dark when a color measurement conforms to standards is printed with at least one printing ink that is lighter than the substrate, and at least one color value of the printing ink is determined from a measurement variable, the color value of the at least one Printing ink is regulated with the aid of a specified reference value of a color location in the color space which is lighter than the printing ink.
  • coating is a main group of
  • the coating material after its application and, if appropriate, after physical drying and / or chemical hardening on the substrate preferably forms in each case a thin layer z. B. in the micrometer range or in the nanometer range.
  • the coating materials also include film-forming paints or paints, which also include z. B. in the graphic industry or in printing technology used inks, varnishes, inks or inks and z. B. coating colors used in the paper industry for surface finishing can be counted.
  • the substrate is as a printing material
  • the printing material consists in particular of paper, cardboard, cardboard, sheet metal, textiles, glass, ceramics or a foil made of metal or a plastic.
  • a z. B. from paper, cardboard, cardboard, foil, sheet metal or textiles printing material is in particular formed flat as a sheet or as a material web.
  • a z. B. from sheet metal, plastic, glass or ceramic substrate can also be used as a
  • Hollow body e.g. B. as a container, preferably as a can or as a cup or as a bottle or as a tube.
  • the one on the respective substrate The coating material to be applied is preferably a colorant, that is to say a coloring inorganic or organic substance which can be of natural or synthetic origin and has pigments or at least one colorant.
  • the coating to be carried out according to the invention takes place in particular in an industrial process in a machine processing the respective substrate,
  • the coating material to be applied to the respective substrate can be opaque or glazed.
  • a glazing coating material can be transparent, i. H. translucent or translucent, or translucent, d. H. be partially translucent.
  • an opaque coating material is opaque at least from a certain layer thickness applied to the respective substrate, i. H. opaque.
  • Translucency and opacity are therefore reciprocal properties.
  • the opacity is therefore a measure of the opacity or haze of translucent, i.e. H. scattering translucent materials and layers.
  • O 100% minus light transmission.
  • a sheet of paper with a light transmittance of one percent has an opacity of 99%.
  • opaque printing inks are often used for functional or decorative reasons.
  • These inks can e.g. B. primary colors such as red, green and blue or cyan, yellow, magenta and black or opaque white or various metallic colors such as. B. be gold or silver.
  • Printing machine or in a paper processing machine made application of a coating material on a substrate is used to assist in the production of a desired quality of the coating during the ongoing operation of the Printing machine or the paper processing machine inline and / or online, ie accompanying the production inside and / or outside the respective machine usually with a contactless working detection device, e.g. B. with a working in an optoelectronic measuring device, preferably densitometrically or spectrophotometrically in particular continuously checked. With this check, it is of particular interest to gain knowledge of the layer thickness already applied to the respective substrate.
  • the problem is that when a covering coating material is checked in a densitometric or spectrophotometric measuring method, measured values, e.g. B.
  • Layer thickness is applied to the respective substrate, which is at least uneconomical and also unnecessarily weighed down the respective substrate.
  • An application device arranged in a printing press or in a paper processing machine for the machine application of a coating material to a substrate preferably has a metering device controlled or regulated by a control unit.
  • the invention is based on the object of a method for setting a To create a layer thickness of an opaque coating material to be applied to a substrate in each case by an application device, in particular in a printing press or in a paper processing machine, with which the layer thickness of the opaque coating material applied by the application device to the substrate in question has a predetermined value, in particular to a value Opacity of 100% associated value is set and / or is kept constant at this value.
  • a first solution consists, in particular, in that a control unit connected to the detection device determines from the measurement values of the detection device a value, depending in particular on the layer thickness, for the opacity of the layer of coating material applied to the substrate, the control unit determining that of the application device for at least one other
  • the substrate thickness of the coating material to be applied is preferably set on the basis of at least one value of the opacity determined during a growing layer structure such that the layer of the coating material for the opacity which is applied to the at least one further substrate preferably has a value previously determined in the control unit in the range of at least 95% to 100% achieved and / or maintained during ongoing production.
  • a second solution can consist in that the coating material is applied by means of the application device in a printing process at different locations on the substrate in question, the coating material in at least one first location on the substrate in each case in a plurality of halftone dots
  • a control unit connected to a detection device comprising data from the detection device at the respective first and second location on the substrate in question having a respective value for the optical density of the layer of coating material applied to the relevant points on the substrate is determined, the control unit determining the layer thickness of the coating material currently applied to the substrate in question by the application device, at which the value for the optical density determined in a grid field corresponds to the value for the optical density determined in a solid tone field, than that layer thickness of the
  • Coating material with an opacity of 100% Coating material with an opacity of 100%.
  • the layer thickness of the covering coating material applied by the application device to the substrate in question has a value previously determined in the control unit, in particular a value associated with an opacity in the range of at least 95% to 100% can be set and / or kept constant at this value.
  • the consumption of the covering coating material is optimized in an industrial process carried out by a printing press or a paper processing machine.
  • FIG. 1 shows a machine unit of a printing press with an application device
  • FIG. 2 shows a sheet with at least one printed image and with a measuring strip.
  • the invention is illustrated below, using the example of a
  • Printing machine preferably a rotary printing machine, in particular a sheet-fed rotary printing machine explained.
  • the printing press can e.g. B. in an offset printing process or in a flexographic printing process or in a screen printing process or in an inkjet printing process.
  • FIG. 1 shows, simplified and schematically in a detail from the printing press, a machine unit 01 with a transport device arranged in a frame 03 for transporting at least one to be processed in this printing press,
  • this transport device z. B. at least one transport cylinder 02, in the preferred embodiment in the transport direction T of the at least one substrate, preferably successively several, z. B. three or more in a row
  • Transport cylinder 02 has.
  • the respective direction of rotation of the transport cylinder 02 is indicated by an arrow.
  • Transport cylinders 02. The respective transport cylinders 02 are e.g. B. multi-sized, so that two or three or even more substrates are arranged or at least can be arranged one behind the other on their respective circumference.
  • This opaque coating material is e.g. B. an opaque printing ink
  • the z. B. is designed as a base color or as an opaque white or as a metallic color.
  • a layer thickness of the with the Application device 04 coating material applied to the substrate lies e.g. B. in the micrometer range or in the nanometer range. That is in a printing press
  • Application facility 04 z. B. formed as a controlled or regulated by a control unit 06 metering device, this metering device in each case by a
  • Reservoir reservoirs for coating material e.g. B. ink fountain or doctor blade system 09, and / or a cycle of a lifting device transferring the coating material and / or a rotational speed of a roller transferring or applying the coating material, e.g. B. duct 07 and / or application roller 08, each affects an amount of the coating material to be applied to the substrate.
  • the application device 04 can in the printing machine in the transport direction T of the at least one substrate z. B. be arranged in front of a printing unit belonging to the printing press, in order, for. B. first apply an opaque white to the respective substrate before the layer formed from the opaque white is at least partially overprinted with at least one other printing ink. On the other hand, the application device 04 can also move in the printing machine T in the transport direction T of the at least one substrate
  • Printing press belonging to the printing press may be arranged in order to at least partially overprint at least one printing ink already applied to the respective substrate and thus z. B. to produce a backlit print product with a special effect.
  • the opaque coating material can be applied to the respective substrate over the entire surface or partially or in a grid pattern.
  • the layer of the covering coating material applied to the respective substrate with the application device 04 in the printing press can also be underlaid with a primer layer for better adhesion. If necessary, the opaque coating material can also be applied several times to the same substrate in the printing press, in which case the substrate T in the transport direction T. B. more than just a single machine unit 01 is arranged with an application device 04.
  • a device for physical drying and / or for chemical hardening may be provided, the device for physical drying z. B. as a hot air dryer 1 1 and / or as an infrared dryer 11 and the device for chemical hardening z. B. are designed as a UV dryer 1 1.
  • the layer thickness of the coating material applied to the substrate by the application device 04 is controlled by a detection device 12, the detection device 12 being dependent on the covering coating material applied to the respective substrate during an ongoing operation of the printing press, i. H.
  • control unit 06 determines a value for the opacity of the layer of the coating material applied to the substrate from the measured values provided by the detection device 12.
  • the signal paths and signal directions from the detection device 12 via the control unit 06 to the application device 04 are indicated in FIG. 1 by directional arrows.
  • Operating data and / or control data can also be provided bidirectionally, in particular between the control unit 06 and the application device 04. It is provided that the control unit 06, following the determination of the current value for the opacity of the layer of the coating material already applied to the substrate, the layer thickness of the coating device to be applied by the application device 04 to at least one further substrate
  • control unit 06 sets the application device 04 in such a way that the application device 04 applies to the at least one further substrate layer of the coating material to be applied reaches a value in the range of at least 95% to 100% for the opacity and / or maintains it during operation of the printing press.
  • the detection device 12 preferably operates in a contactless manner and / or using an optoelectronic measurement method and / or densitometrically or spectrophotometrically.
  • the detection device 12 is designed as a camera, e.g. B. designed as a grayscale camera or as an RGB camera or as a CMYK color measurement camera, the control unit 06 z. B. by a
  • the current value for the opacity of the layer of the coating material applied to the substrate is determined from at least one photographic image or from the image data on which it is based.
  • the detection device 12 is designed as a reflection light scanner.
  • the control unit 06 adjusts the layer thickness of the coating material applied to the substrate by the application device 04, in particular based on at least one value of the opacity determined during a growing layer structure, eg. B. in a ramp-up of the printing press or in another
  • FIG. 2 shows a substrate designed as a sheet 13 with at least one print image 14 and with a measurement strip 16 extending transversely to the transport direction T of the substrate in question, in particular over the width of the print image 14.
  • the measurement strip 16 has a plurality of measurement fields 17 lined up, with individual ones Measuring fields 17 z. B. full area or screened z. B. in the printing machine according to FIG. 1 in an industrial process with the described application device 04 are each coated with a coating material.
  • control unit 06 connected to the detection device 12 determines the respective value of the opacity of the coating material applied in the at least one measuring field 17 in the measuring strip 16 of the sheet 13. It can be provided that the control unit 06 determines the respective value of the opacity of the respectively applied layer of the coating material from several or all measuring fields 17 in the measuring strip 16 of the sheet 13 and, depending on the determined value for the opacity of the respectively applied layer of the coating material from the application device 04 to at least one
  • a further embodiment variant provides for the respective value of the opacity of the layer of coating material applied in each case instead of or in addition to that
  • the coating material by means of
  • the different locations on the relevant sheet 13 are z.
  • a z. B. formed as a measuring field 17 first location on the sheet 13 in question, to which the coating material is applied in a screened manner, is also referred to as a screen
  • a z. B. formed as a measuring field 17 second location on the sheet 13 in question, on which the coating material is applied over the entire surface is also referred to as a solid field.
  • the control unit 06 determines data acquired by the detection device 12 at the respective first and second location on the sheet 13 in question, eg. B. image data, a respective value for the optical density of the layer of the coating material applied to the relevant points on the sheet 13.
  • the control unit 06 also preferably sets the respective value DR for the optical density determined from a grid field to the respective value DV for the optical density z determined from a solid tone field. B. by forming a quotient DR / DV in a ratio. Since the optical density is proportional to the amount of pro
  • Area unit on the sheet 13 at the relevant points on the sheet 13 z. B. is coating material applied in the respective measuring fields 17 of the measuring strip 16, the value DR for the optical density determined in a grid is all in one
  • Printing process at least initially less than the value DV for the optical density determined in a solid tone field.
  • optical density determined in relation to the respective grid and the ratio formed from the respective value DR for the optical density determined from a grid and the respective value DV for the optical density determined from a solid tone field changes significantly.
  • the control unit 06 now, in particular if it detects a significant change in the ratio formed from the optical densities, that is to say as a function of this determination, the layer thickness currently applied by the application device 04 on the sheet 13 in question in the current printing process of the coating material, in which the value DR for the optical density determined in a grid field corresponds to the value DV for the optical density determined in a solid tone field, as the layer thickness of the coating material with an opacity of 100%.
  • the significant change in the ratio formed from the optical densities can e.g. B.
  • the control unit 06 checks in a series of several successive surveys of the optical densities in question a course or a behavior of this relationship for a significant change, ie a change that exceeds the permissible tolerance limits.
  • the determination regarding the layer thickness of the coating material with an opacity of 100% takes place e.g. B. by the fact that the control unit 06 the currently provided operating data and / or control data of the application device 04 in one
  • Storage device 19 in association with an opacity of 100% for the
  • Layer thickness of the coating material stores. Following the hit
  • the control unit 06 sets the layer thickness of the coating material to be applied by the application device 04 to at least one further substrate, that is to say in particular at least one further sheet 13, such that the layer of the coating material to be applied by the application device 04 to the opacity Value of 100% in the further printing process, in particular during operation of the printing press or the paper processing machine, and thus maintains it.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé permettant d'ajuster la densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application (04) sur un substrat (13) de manière à le recouvrir, le matériau de revêtement étant appliqué sur le substrat (13) dans une imprimante ou dans une machine de traitement du papier. Le matériau de revêtement est appliqué par le dispositif d'application (04) sur le substrat (13) concerné en différents emplacements par un processus mécanique, le matériau de revêtement étant appliqué respectivement sur le substrat (13) concerné en une trame présentant plusieurs points de trame en au moins un premier emplacement et étant appliqué respectivement sur le substrat (13) concerné sur la totalité de la surface en au moins un second emplacement, le premier emplacement concerné formant sur le substrat (13) concerné respectivement une zone tramée et le second emplacement concerné formant sur le substrat (13) concerné respectivement une zone unie. Une unité de commande (06) connectée à un dispositif de détection (12) détermine, à partir de données détectées par le dispositif de détection (12) respectivement au premier et au second emplacement sur le substrat (13) concerné, une valeur respective de densité optique de la couche de l'emplacement concerné sur le substrat (13), et l'unité de commande (06) définit en tant que densité de couche du matériau de revêtement présentant une opacité d'une valeur de 100 % la densité de couche actuellement appliquée sur le substrat (13) concerné par le dispositif d'application (04) au cours du processus d'application pour laquelle la valeur de la densité optique déterminée dans une zone tramée correspond à la valeur de la densité optique déterminée dans une zone unie.
EP19752500.9A 2018-08-31 2019-08-09 Procédé permettant d'ajuster une densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application sur un substrat de manière à le recouvrir Active EP3843999B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018121301.8A DE102018121301A1 (de) 2018-08-31 2018-08-31 Verfahren zum Einstellen einer Schichtdicke eines von einer Auftrageinrichtung auf ein Substrat aufzutragenden deckenden Beschichtungsstoffes
PCT/EP2019/071451 WO2020043463A1 (fr) 2018-08-31 2019-08-09 Procédé permettant d'ajuster une densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application sur un substrat de manière à le recouvrir

Publications (2)

Publication Number Publication Date
EP3843999A1 true EP3843999A1 (fr) 2021-07-07
EP3843999B1 EP3843999B1 (fr) 2022-08-24

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EP19752500.9A Active EP3843999B1 (fr) 2018-08-31 2019-08-09 Procédé permettant d'ajuster une densité de couche d'un matériau de revêtement devant être appliqué par un dispositif d'application sur un substrat de manière à le recouvrir

Country Status (4)

Country Link
US (1) US11173702B2 (fr)
EP (1) EP3843999B1 (fr)
DE (1) DE102018121301A1 (fr)
WO (1) WO2020043463A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102021104951A1 (de) * 2020-03-19 2021-09-23 Heidelberger Druckmaschinen Aktiengesellschaft Inline Deckweißregelung

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WO2020043463A1 (fr) 2020-03-05
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US11173702B2 (en) 2021-11-16
EP3843999B1 (fr) 2022-08-24

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