WO2013076526A1 - Ensemble pour détecter des paramètres géométriques de supports pour plaques d'impression - Google Patents

Ensemble pour détecter des paramètres géométriques de supports pour plaques d'impression Download PDF

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Publication number
WO2013076526A1
WO2013076526A1 PCT/IB2011/055230 IB2011055230W WO2013076526A1 WO 2013076526 A1 WO2013076526 A1 WO 2013076526A1 IB 2011055230 W IB2011055230 W IB 2011055230W WO 2013076526 A1 WO2013076526 A1 WO 2013076526A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
adhesive tape
geometric
double adhesive
printing
Prior art date
Application number
PCT/IB2011/055230
Other languages
English (en)
Inventor
Stefano Sambri
Alberto Zanoli
Original Assignee
Bieffebi - Societa' Per Azioni
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 Bieffebi - Societa' Per Azioni filed Critical Bieffebi - Societa' Per Azioni
Priority to PCT/IB2011/055230 priority Critical patent/WO2013076526A1/fr
Priority to TW101143530A priority patent/TW201404603A/zh
Publication of WO2013076526A1 publication Critical patent/WO2013076526A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/14—Registering devices with means for displacing the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B41F27/1275—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means by means of adhesives, staples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the present invention relates to an assembly for detecting geometric parameters of supports for printing plates, particularly for printing plate cylinders, sleeves and printing plate blankets that are adapted to accommodate on their surface, with the interposition of suitable layers of double adhesive, respective printing plates.
  • This detection and comparison method performed for monitoring the geometric parameters is considered valid but limited, since it can analyze up to a maximum of 40 points for each printing plate supporting cylinder/sleeve and has been considered too slow because a removable mask is required in order to be able to detect the surface of the printing plate.
  • the thickness of a printing plate instead, is in fact generally very regular and precise.
  • Double adhesive is instead constituted generally by a polymeric foam (generally made of polyethylene and polymers with similar chemical, physical and mechanical properties) provided with thin layers of adhesive material on both flat surfaces.
  • a polymeric foam generally made of polyethylene and polymers with similar chemical, physical and mechanical properties
  • the unevenness of the material also caused by. the tendency to expand and contract of the air bubbles trapped therein as a function of temperature, often causes most of the dimensional, geometric and alignment errors of the entire printing assembly.
  • the aim of the present invention is to solve the problems described above, by proposing an assembly for detecting geometric parameters of supports for printing plates which is adapted to detect the dimensional parameters of a support on which the double adhesive is mounted.
  • an object of the invention is to propose an assembly for detecting geometric parameters of supports for printing plates that is adapted for the virtual superimposition, on the detected image of the support provided with double adhesive, of the file that represents the printing plate from a geometric and dimensional standpoint.
  • Another object of the invention is to propose an assembly for detecting geometric parameters of supports for printing plates on bands of predefined width of the lateral surface of the support being considered.
  • a further object of the present invention is to provide an assembly for detecting geometric parameters of supports for printing plates that has modest costs, is relatively simple to provide in practice and is safe in application.
  • an assembly for detecting geometric parameters of supports for printing plates said supports being constituted by a substantially cylindrical body surmounted by at least one additional layer generally constituted by double adhesive tape, characterized in that it comprises at least one sensor, which is aligned with at least one portion of the outer surface of the support to be analyzed to detect the shape of the outer surface of the double adhesive tape that surmounts the cylindrical body.
  • Figure 1 is a schematic front view of a possible embodiment of an assembly for detecting geometric parameters of supports for printing plates according to the invention arranged on a printing plate mounting unit;
  • Figure 2 is a schematic front view of a further simplified embodiment of an assembly for detecting geometric parameters of supports for printing plates according to the invention, arranged on a different printing plate mounting unit;
  • Figure 3 is a side view of a support for printing plates, on which a layer of double adhesive surmounted by respective printing plates is arranged;
  • Figure 4 is a front view of a support for printing plates on which a layer of double adhesive surmounted by two respective printing plates is arranged.
  • the reference numeral 1 generally designates an assembly for detecting geometric parameters of supports 2 for printing plates A.
  • an apparatus which comprises a sensor (WO2010/060884) that enables to check the geometric errors of the printing plates mounted on the printing plate sleeves/cylinders in a predefined number of points (a maximum of 8 points on the circumference for a maximum of 5 bands on the axial length of the printing support).
  • Masking has become indispensable in order to overcome the difference of the surfaces to be analyzed, for example:
  • the apparatus for controlling geometric parameters makes it possible to check the total errors with respect to the nominal values combined from the cylinder/sleeve and from the double adhesive related to concentricity, roundness, circularity in the region of interest (i.e., the printing region).
  • photopolymeric plates for flexographic printing (the plates that constitute the raw material of which the printing plates will be made), prior to etching, have a manufacturing tolerance on their thickness with a very good class of precision, which on average is contained within ⁇ 0.01 mm with respect to the value of the nominal thickness.
  • a measurement of the plates before etching makes it possible in any case to have assurance of the value of their dimensions. It is also known that geometric errors are caused
  • sleeves which, being made of a material such as plastic (therefore material of polymeric origin), over time undergo deformations of even ⁇ 0.05 mm,
  • the printing supports 2, in the specific case, are constituted by a substantially cylindrical body 3 which is surmounted by at least one additional layer, which is generally constituted by double adhesive tape 4.
  • an intermediate layer can also be provided which is constituted by a blanket/sleeve 5 designed to adapt the diameter of the cylindrical body 3 to the dimensions of the printing plate A.
  • the assembly 1 comprises at least one sensor 6, which is aligned with at least one portion of the outer surface of the support 2 to be analyzed in order to detect the shape of the outer surface of the double adhesive tape 4 arranged on the surface of the cylinder 3 (or on the surface of the blanket/sleeve 5).
  • the sensor 6, according to a particular constructive solution of unquestionable interest in practice and in application, is an apparatus for acquiring geometric errors on the double adhesive 4, considering the virtual existence of the regions in relief of the printing plate A (this assessment is calculated simply on the basis of the geometric information contained in the data banks that contain the files related to the printing plate A).
  • the apparatus is preferably of the type that comprises a laser emitter and a potential visual emulation detector (for example of the type known commercially as E 3 -CMOS).
  • the senor 6 comprises a laser emitter and a suitable detector of reflected signals, in order to acquire the distance between the emission plate of the laser emitter itself and the surface that faces it (the outer surface of the double adhesive tape 4 that faces the plate of the emitter).
  • the assembly 1 comprises a control and management unit 7, which is provided with at least one respective memory element for storing the geometric and dimensional parameters of the printing plate A (in particular the dimensions actually detected during its production or the theoretical ideal dimensions related to its design specifications), the printing plate A being subsequently mounted on the double adhesive tape 4.
  • a control and management unit 7 which is provided with at least one respective memory element for storing the geometric and dimensional parameters of the printing plate A (in particular the dimensions actually detected during its production or the theoretical ideal dimensions related to its design specifications), the printing plate A being subsequently mounted on the double adhesive tape 4.
  • the assembly 1 further comprises a board for acquiring the information detected by the sensor 6.
  • the unit 7 is thus preset for the virtual superimposition of the geometric and dimensional parameters of the printing plate A on the dimensional and geometric information related to the double adhesive tape 4, detected by the sensor 6.
  • This virtual superimposition consists in adding, point by point, to the thickness of the printing support 2 detected by the sensor 6, the thickness of the corresponding point of the printing plate A, determining the actual thickness that the entire print roller will have once the printing plate A has been mounted on the support.
  • the virtual superimposition enables to verify, even before mounting the printing plate A on the double adhesive tape 4, the presence of errors in positioning, alignment, concentricity and roundness of the entire roller, making it possible to eliminate or reduce the errors when in actual fact they have not yet occurred in practice.
  • control and management unit 7 can comprise positively at least one adjustable filter, which is controlled by the card for the acquisition of the signals received from the sensor 6, in order to adjust the resolution of the sensor 6.
  • the adjustment becomes necessary in order to exclude the surface irregularities of the double adhesive tape 4 caused by the nature of the material of which it is constituted (polymeric foam, as mentioned earlier constituted preferably by polyethylene).
  • the double adhesive tape 4 also has microgrooves which are designed to convey outward any air bubbles, in order to prevent the inclusion of the bubbles between the tape 4 and the surfaces to which it is fixed from causing irregularities of the surface on which the printing plate A will be fixed. It is fundamental for the sensor 6 to be calibrated so as to not read these grooves, since they would alter the detections.
  • the assembly 1 conveniently can comprise at least one display 8 to be used by the operator and controlled by the control and management unit 7.
  • Such display 8 is designed to represent an image that corresponds to the virtual superimposition of the geometric and dimensional parameters of the printing plate A contained in the storage element on the dimensional and geometric information related to the double adhesive tape 4 detected by the sensor 6.
  • the assembly 1 can comprise an interface apparatus of the type of a printer, a screen, a display and the like, to be used by the operator and controlled by the control and management unit 7 in order to indicate the geometric and dimensional data related to the virtual superimposition of the geometric and dimensional parameters of the printing plate A contained in the storage element on the dimensional and geometric information related to the double adhesive tape 4 detected by the sensor 6.
  • the interface apparatus is designed to indicate the geometric and dimensional data of the virtual superimposition preferably only at the printing regions of the printing plate A, identified by the data that are present in the storage element with reference to the printing plate A.
  • This type of localized detection enables to minimize verification times. If the printing regions of the printing plate A are correctly positioned and therefore capable of printing in an optimum manner, what occurs in the other regions is in fact marginal in practice and is unimportant in terms of the assessment of any errors that might compromise the print.
  • the senor 6 must be of the type suitable to detect dimensional and geometric information related to the double adhesive tape 4 and to the support 2 (understood as the cylindrical body 3 that is optionally surmounted by a blanket/sleeve 5) on which it is mounted, the information being of the type of concentricity, roundness, deviation with respect to the theoretical ratio at preset angular positions.
  • the senor 6 is suitable to detect continuously a predefined band of the support 2 surmounted by the double adhesive tape 4 that is aligned therewith and can rotate with respect to its own longitudinal axis in front of the sensor 6.
  • the breadth of the band depends on the breadth of the typical beam of the sensor 6 and on the distance between the sensor 6 and the double adhesive tape 4.
  • the possibility to have means for adjusting the width in order to investigate very large or substantially point-like areas is provided.
  • the machine that is equipped with the assembly 1 according to the invention is generally the same one used for mounting and registering the printing plates A and allows:
  • the stored digital image is paired with the corresponding position detections of the sensor 6 (or of the video cameras B) along the respective sliding direction and of the support 2 (which can rotate about its own axis).
  • the sensor 6 for detecting and checking the geometric parameters is mounted on a sliding carriage 9 which supports a video camera B and is arranged with a scanning direction that is perpendicular to the rotation axis of the support 2.
  • the detection axis of the two video cameras B is reset on the same reference point that exists on the file that contains all the dimensional and geometric parameters of the printing plate A and also the sensor 6 for checking the parameters must be reset to the same reference point during the operations for checking the geometric parameters.
  • adopting the assembly 1 according to the invention enables to check the geometric parameters, measuring the surface of the double adhesive tape 4 only in the printing regions that correspond to the virtual image of the preprocessed graphical reproduction that can be arranged on the positioning scheme and that corresponds to the image on the printing plate A.
  • the measurement of the thickness of the printing plate A can also be calculated virtually and corresponds to the measurement of the theoretical thickness or to the measurement of the previously detected thickness (for example during the production of the printing plate A).
  • the measurement of the surface of the double adhesive tape 4 to check the geometric parameters is performed advantageously by means of a detection sensor 6, which is arranged and can slide parallel to the axis of the support 2 and enables to acquire a large number of points on the width of approximately 50 mm and to detect a large number of points on the circumference that corresponds to the rotation through one turn of the support 2.
  • a detection sensor 6 which is arranged and can slide parallel to the axis of the support 2 and enables to acquire a large number of points on the width of approximately 50 mm and to detect a large number of points on the circumference that corresponds to the rotation through one turn of the support 2.
  • the sensor 6 is adjusted before beginning the geometric checks at a fixed and known distance from the pivoting and mounting axis of the support 2.
  • the assembly 1 for "geometric parameter checking” is normally applied to a printing plate mounting device that is adapted for mounting the printing plates A in register, but can also be included on a completely dedicated structure, constituting in practice an autonomous machine.
  • the sensor 6 is connected preferably by means of a flexible cable to the control and management unit 7, which by means of specific software can communicate with the computer that manages the printing plate mounting device (the control and management unit 7 might also constitute the computer of the printing plate mounting device in particular constructive solutions).
  • Operation of the assembly 1 is as follows. It is necessary first of all to acquire and store the geometric and dimensional parameters of the printing plate A. These data can be supplied by the manufacturer or obtained by means of specific measurement instruments.
  • the thickness of the printing support 2 that comprises the double adhesive tape 4 by means of the difference between the two indicated values.
  • This operation must be performed at a plurality of points which are predefined by cylindrical coordinates constituted by a longitudinal position along the axis with respect to a linear reference and an extent of rotation with respect to an angular reference.
  • the thickness of the printing support 2 (which comprises the double adhesive tape 4) the thickness of the printing plate A in the corresponding point, the thickness of the printing plate A being obtained from the acquired and stored data.
  • the assembly 1 according to the invention is suitable for detecting the dimensional parameters of a support 2 on which the double adhesive tape 4 is mounted.
  • the assembly 1 according to the invention is suitable for the virtual superimposition, on the acquired image of the support 2 provided with double adhesive tape 4, of the file that represents the printing plate A from a geometric and dimensional standpoint.
  • the assembly 1 according to the invention can perform detections on bands of predefined extent of the lateral surface of the support 2 being considered.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

L'invention porte sur un ensemble (1) pour détecter des paramètres géométriques de supports (2) pour des plaques d'impression (A), les supports (2) étant constitués par un corps sensiblement cylindrique (3) surmonté par au moins une couche additionnelle globalement constituée par une bande adhésive double (4). L'ensemble (1) comprend au moins un capteur (6), qui est aligné avec au moins une partie de la surface externe du support (2) à analyser afin de détecter la forme de la surface externe de la bande adhésive double (4) qui surmonte le corps cylindrique (3).
PCT/IB2011/055230 2011-11-22 2011-11-22 Ensemble pour détecter des paramètres géométriques de supports pour plaques d'impression WO2013076526A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IB2011/055230 WO2013076526A1 (fr) 2011-11-22 2011-11-22 Ensemble pour détecter des paramètres géométriques de supports pour plaques d'impression
TW101143530A TW201404603A (zh) 2011-11-22 2012-11-21 用於偵測印刷板支撐件幾何參數之總成

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/055230 WO2013076526A1 (fr) 2011-11-22 2011-11-22 Ensemble pour détecter des paramètres géométriques de supports pour plaques d'impression

Publications (1)

Publication Number Publication Date
WO2013076526A1 true WO2013076526A1 (fr) 2013-05-30

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WO (1) WO2013076526A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20130568A1 (it) * 2013-10-16 2015-04-17 Bieffebi Spa Modulo, procedimento ed apparecchiatura per l'analisi dimensionale di un cilindro porta-cliche'
CN104742514A (zh) * 2015-02-26 2015-07-01 重庆宏劲印务有限责任公司 一种烫金压力的检测方法
CN105730002A (zh) * 2016-04-13 2016-07-06 龙会伦 一种柔版自动贴版装置
JP2021000781A (ja) * 2019-06-24 2021-01-07 総武機械株式会社 印刷用樹脂凸版の貼込装置
CN114379222A (zh) * 2020-10-22 2022-04-22 海德堡印刷机械股份公司 用于测量转动体的表面或其隆起部的设备和系统
CN114701257A (zh) * 2022-04-17 2022-07-05 广东潮华龙印刷有限公司 一种印刷设备模具切换装置
EP4000931B1 (fr) 2019-05-09 2023-06-14 Heidelberger Druckmaschinen AG Dispositif de mesure des bosses de la surface d'un corps rotatif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108068442A (zh) * 2017-12-22 2018-05-25 瑞安市博业激光应用技术有限公司 Ar图像对版机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916102A1 (fr) * 2006-10-23 2008-04-30 Fischer & Krecke GmbH & Co. KG Procédé, dispositif de montage et unité de control pour ajuster un cylindre dans une machine à imprimer
WO2010060884A1 (fr) 2008-11-25 2010-06-03 Bieffebi - Societa' Per Azioni Appareil pour vérifier les paramètres géométriques d’ensembles d’impression constitués de plaques d’impression flexographique montées sur des cylindres respectifs, de plaques d’impression flexographique montées sur des manchons de plaque d’impression respectifs et des cylindres/manchons d’encrage
WO2010146040A1 (fr) * 2009-06-16 2010-12-23 Bieffebi - Societa' Per Azioni Appareil pour vérifier des paramètres géométriques d'ensembles d'impression constitués par des plaques d'impression flexographiques montées sur des rouleaux respectifs, par des plaques d'impression flexographiques montées sur des manchons de support de plaque d'impression respectifs et par des rouleaux/manchons d'encrage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916102A1 (fr) * 2006-10-23 2008-04-30 Fischer & Krecke GmbH & Co. KG Procédé, dispositif de montage et unité de control pour ajuster un cylindre dans une machine à imprimer
WO2010060884A1 (fr) 2008-11-25 2010-06-03 Bieffebi - Societa' Per Azioni Appareil pour vérifier les paramètres géométriques d’ensembles d’impression constitués de plaques d’impression flexographique montées sur des cylindres respectifs, de plaques d’impression flexographique montées sur des manchons de plaque d’impression respectifs et des cylindres/manchons d’encrage
WO2010146040A1 (fr) * 2009-06-16 2010-12-23 Bieffebi - Societa' Per Azioni Appareil pour vérifier des paramètres géométriques d'ensembles d'impression constitués par des plaques d'impression flexographiques montées sur des rouleaux respectifs, par des plaques d'impression flexographiques montées sur des manchons de support de plaque d'impression respectifs et par des rouleaux/manchons d'encrage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20130568A1 (it) * 2013-10-16 2015-04-17 Bieffebi Spa Modulo, procedimento ed apparecchiatura per l'analisi dimensionale di un cilindro porta-cliche'
EP2862717A1 (fr) * 2013-10-16 2015-04-22 Bieffebi Srl Forme, procédure et èquipement pour l'analyse dimensionelle d'un cylindre porte-cliché
CN104742514A (zh) * 2015-02-26 2015-07-01 重庆宏劲印务有限责任公司 一种烫金压力的检测方法
CN105730002A (zh) * 2016-04-13 2016-07-06 龙会伦 一种柔版自动贴版装置
EP4000931B1 (fr) 2019-05-09 2023-06-14 Heidelberger Druckmaschinen AG Dispositif de mesure des bosses de la surface d'un corps rotatif
JP2021000781A (ja) * 2019-06-24 2021-01-07 総武機械株式会社 印刷用樹脂凸版の貼込装置
CN114379222A (zh) * 2020-10-22 2022-04-22 海德堡印刷机械股份公司 用于测量转动体的表面或其隆起部的设备和系统
US11840059B2 (en) 2020-10-22 2023-12-12 Heidelberger Druckmaschinen Ag Device for measuring a surface of a rotary body or elevations thereof and system
CN114701257A (zh) * 2022-04-17 2022-07-05 广东潮华龙印刷有限公司 一种印刷设备模具切换装置

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