EP3204235B1 - Vorrichtung und verfahren zum transport von substraten in einer druckmaschine - Google Patents

Vorrichtung und verfahren zum transport von substraten in einer druckmaschine Download PDF

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Publication number
EP3204235B1
EP3204235B1 EP15777661.8A EP15777661A EP3204235B1 EP 3204235 B1 EP3204235 B1 EP 3204235B1 EP 15777661 A EP15777661 A EP 15777661A EP 3204235 B1 EP3204235 B1 EP 3204235B1
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EP
European Patent Office
Prior art keywords
substrate
gripping means
substrates
printing machine
printing
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.)
Active
Application number
EP15777661.8A
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English (en)
French (fr)
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EP3204235A1 (de
Inventor
Edmond Abergel
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.)
MGI Digital Technology SA
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MGI Digital Technology SA
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Publication date
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Publication of EP3204235A1 publication Critical patent/EP3204235A1/de
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Classifications

    • 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
    • B41J11/0045—Guides for printing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • 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
    • B41J11/0085—Using suction for maintaining printing material flat
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/22—Clamps or grippers
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16—Means for tensioning or winding the web
    • B41J15/165—Means for tensioning or winding the web for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52—Stationary guides or smoothers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/085—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers by combinations of endless conveyors and grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H85/00—Recirculating articles, i.e. feeding each article to, and delivering it from, the same machine work-station more than once
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
    • B65H2301/4433—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material
    • B65H2301/44338—Moving, forwarding, guiding material by acting on surface of handled material by means holding the material using mechanical grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5124—Stretching; Tentering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/70—Other elements in edge contact with handled material, e.g. registering, orientating, guiding devices
    • B65H2404/74—Guiding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/31—Suction box; Suction chambers
    • B65H2406/312—Suction box; Suction chambers incorporating means for transporting the handled material against suction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/113—Size
    • B65H2701/1131—Size of sheets
    • B65H2701/11312—Size of sheets large formats, i.e. above A3
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/15—Digital printing machines

Definitions

  • the present invention relates to the field of printing, in particular without contact with the substrates, and more particularly to a device and a method for transporting printable and printed substrates to all of the workstations included in a printing machine. printing, the transport of the substrates being carried out in such a way as to allow them to be printed under optimum conditions.
  • the Applicant has proposed in its patent application WO2013156540 a device and a method for conveying printable substrates in a precise manner, suitable for substrates of various types, sizes and thicknesses, and for performing variable pitch prints.
  • a system for transporting substrates in a printing machine along a transport path oriented along a longitudinal axis from at least one input magazine supplying the printable substrates, to at least one magazine.
  • outlet receiving the substrates characterized in that it comprises: mobile gripping means, each comprising an opening / closing system ensuring the release or gripping of a substrate, said gripping means comprising front gripping means and rear, each gripping a part, respectively, front and rear of the substrate along the transport path, guide means for guiding the gripping means along the transport path, at least one motorization means ensuring movement of the means gripping along the guide means, preferably with independent movement between at least the front gripping means and the rear gripping means, the transport of substrates thus being adapted to grip each substrate so as to tension and move substrates, even if they have varying lengths, along of the transport path, the guide means, the gripping means and their associated opening / closing system being controlled by computer means.
  • the patent application US2015 / 0049150 describes an apparatus for transporting a substrate, wherein the apparatus includes rails and movable substrate moving and holding units which are configured to interact such that the movement of the movable units is effected by magnetic interaction between the substrate. rail and the so-called mobile units.
  • a low pressure table 70
  • a vacuum table is described therein.
  • the present invention provides a novel device and method for conveying printable and printed substrates in a precise manner, suitable for substrates of various types, sizes and thicknesses.
  • the invention makes it possible to produce prints with variable pitch.
  • the invention is suitable for printing machines without contact with the substrate, such as inkjet printing machines.
  • the invention relates to a substrate transport system according to claim 1.
  • a further object of the invention is to provide a method for transporting substrates according to claim 14.
  • the present invention has many advantages over the techniques of the prior art and, in particular, over WO2013156540 and US2015 / 0049150 .
  • the present invention makes it possible to start printing at a distance very close to the grasping by the mobile gripping means of the front part of the substrate along the transport path which makes it possible to bring the printing device closer to the magazine. entry; thus, the dimension of the transport path and therefore the dimension of the system are considerably limited printing.
  • the present invention relates to a system or device for transporting substrates, as well as a method for transporting substrates.
  • the substrate transport system is described below with reference to the figures, but it is clear that the figures and examples provided in the present application are illustrative and not limiting.
  • Said substrate transport system is included in a printing machine, for example and without limitation an inkjet printing machine.
  • the system for conveying substrates in a printing machine is carried out along a transport path which is oriented along a longitudinal axis from the input magazine supplying the materials. printable substrates to the output tray receiving the printed substrates.
  • a transport path which is oriented along a longitudinal axis from the input magazine supplying the materials. printable substrates to the output tray receiving the printed substrates.
  • it is possible to organize transverse orientations of certain parts of the transport path for example for the first movement of the printable substrate from the input magazine to the rest of the transport path and / or for the last movement of the printed substrate to the output tray).
  • the transport system (and therefore the printing machine) is controlled by computer means which in particular control the various workstations, and also which collect the information from various sensors.
  • These computer means do not have to be detailed in the present application and they can for example be integrated into the machine or deported in a separate device.
  • the sensors provide, for example, information on the positions of the substrates, information on the configurations of the substrates and / or validation information following an operation which has been carried out correctly or not. Certain information necessary for the implementation of the invention can also be recorded beforehand in the computer means (for example via an entry on an interface by an operator). Such information may for example relate to the size of the substrates or their thickness, but it is generally preferred that sensors measure or verify such information.
  • the substrates awaiting printing are generally, in a manner known per se, placed in at least one input store having a capacity defined in depending on the nature of the substrate and printing requirements.
  • an input store is provided to accept several tens, hundreds, or even thousands of substrates of variable nature, thickness and dimension (for example and without limitation of a format whose sides are of the order of a centimeter, for example an A10 type format, for a more precise example a credit card type format; up to the format whose sides are of the order of several meters, for example an A0 type format or a format of 2 x 2 meters).
  • the substrates are stored in at least one output magazine generally having the same capacity as an input magazine.
  • a characteristic of the present invention is therefore the use of a fixed suction floor making it possible to keep the substrates flat on said floor along the transport path, and more particularly under the printing station.
  • Suction floors and their operation are well known to those skilled in the art and the latter can therefore easily use a suction floor suitable for the present invention.
  • the constitution and dimensions of the suction sole are not critical as long as it fulfills its role of keeping the entire substrate flat while allowing its displacement by the action of the mobile gripping means.
  • the traction force exerted by the mobile gripping means to move the substrate is at least greater than the force for maintaining said substrate in position on the fixed suction floor.
  • the dimensions of the suction sole will preferably meet the following criteria: a transverse dimension (that is to say perpendicular to the longitudinal axis in the plane of the transport path) at less equivalent to the transverse size of the largest substrate used - and a longitudinal dimension at least equivalent to the longitudinal dimension represented by the printing station as such.
  • This minimum longitudinal dimension is justified by the fact that the substrate remains well maintained flat and under sufficient tension to ensure optimum printing thereof when it is moved by the mobile gripping means under the printing station.
  • a station for curing and / or drying the ink deposited on the substrate is present in the printing machine and is located after the printing station; this curing and / or drying station advantageously comprises a ultraviolet radiation system, for example UV radiation by conventional UV lamp, and / or UV radiation by light-emitting diode (LED), preferably UV radiation comprising a light-emitting diode (LED) station and a conventional UV lamp station.
  • a transport system is used in this station in accordance with that used in the printing station, namely a fixed suction floor and at least one mobile gripping means.
  • the suction hearth will therefore have a sufficient longitudinal dimension in order to be able to transport the printed substrate flat through said curing and / or drying station and, preferably, a transverse dimension at least equivalent to the transverse size of the printed substrate.
  • One or two (or more) suction soles in series can therefore be used in the context of the present invention.
  • the fixed suction floor will be the same for the printing station as well as the drying and / or curing station; in this configuration, the suction floor will therefore have a sufficient longitudinal dimension in order to be able to transport the substrate flat from the inlet of the printing station to the outlet of the drying and / or curing station.
  • the same mobile gripping means will be used both for transporting the substrate through the printing station and through the drying and / or curing station.
  • the ink preferably a varnish
  • the stationary suction sole for keeping the substrate flat during its transport in the drying and / or curing station makes it possible to improve said drying and / or curing.
  • the ink preferably a varnish
  • the ink will preferably be of the “hardenable ink” and / or “hardenable varnish” type; by way of illustration, we will cite varnishes and / or inks comprising in their composition at least one component containing a polymerizable functionality, preferably an acrylate function.
  • the fixed suction floor is generally made mainly of metal.
  • a characteristic of the suction floor according to the present invention is that it allows the displacement of the substrate while keeping the latter flat; thus, the fixed suction floor is formed, at least in its upper layer coming into contact with the substrate, of a material that meets the requirements related to this characteristic.
  • the stationary suction floor comprises, at least in its upper layer coming into contact with the substrate, a material allowing the sliding of the substrate on the floor.
  • thermoplastic polymers for example polytetrafluoroethylene also known under the name of Teflon, or else a grained metal surface will be mentioned.
  • the surface of the suction floor on which the substrate is moved along the transport path generates a friction force generating a tensioning of the substrate during its movement.
  • This frictional force responsible for the tensioning may for example come from the chemical nature of the surface of the sole in contact with the substrate. Any other suitable means for meeting this frictional force characteristic can also be used in the present invention; by way of non-limiting example, the roughness of the surface of the sole in contact with the substrate will be mentioned. This roughness can either come from the very nature of the upper layer of the sole, or come from any chemical and / or physical treatment of said upper layer of the sole, for example by abrasion technique.
  • the stationary suction sole comprises several suction zones (for example different zones connected to different chambers) so as to control the suction power of the sole according to the positioning of the substrate. ; this not only makes it possible to balance the suction as well as possible whatever the position and size of the substrate, but also to be able to limit the suction in specific areas such as below the printheads.
  • a characteristic of the present invention is therefore the use of at least one mobile gripping means gripping a front part of the substrate along the transport path;
  • the mobile gripping means can advantageously comprise an opening / closing system ensuring the release or the gripping of a substrate, by way of example one or more clamps as described further on in the present description. It is obvious to those skilled in the art that other mobile gripping systems could also be used in the context of the present invention.
  • a movable transverse strip which by clamping the substrate by pressure between said strip and the fixed sole will allow the substrate to be moved along the transport path.
  • the vertical dimensions (that is to say perpendicular to the plane of the transport path) of the mobile gripping means located above the substrate will be minimized.
  • this optimum distance is generally less than 5 millimeters (mm) and may even be of the order of a millimeter (mm), it will therefore be preferable to use a system of mobile gripping means, the vertical dimensions of which will be less than the distance between the face top of the substrate and the printheads, for example less than 80% of the distance (perpendicular to the substrate) between the top face of the substrate and the printheads, for example less than 4 mm, 3 mm, 2 mm, and even less than or equal to 1 mm.
  • a device for gripping the substrates makes it possible to remove the substrates from the input magazine and to place them on drive means, for example.
  • the substrate transport system the characteristics of which will be detailed later in the description, to move them along a work line generally comprising several work stations, for example and without limitation at least one printing station comprising a plurality of inkjet (and / or varnish) printing heads preferably controlled by computer means, optionally followed by a station for curing and / or drying the ink (preferably, varnish), this ink and / or varnish can be of any suitable type; by way of illustration, we will cite functional and / or intelligent inks, etc.
  • the printing machine makes it possible to print from one substrate to another with a variable pitch, thanks to the transport system, as detailed below. This means that the printing machine is able to adapt the use of the printing heads and the transport speed of the substrates according to the size of the substrates, for example thanks to sensors installed on the printing machine. .
  • the printing machine is equipped with a device for turning over the substrates, allowing double-sided printing of said substrates.
  • the substrate transport system comprises mobile gripping means, moving along a transport path oriented along a longitudinal axis, by example between an input magazine providing printable substrates and an output magazine receiving printed substrates.
  • the transport path is defined by the plane in which the substrates move and oriented along the longitudinal axis.
  • the substrates can be blank, or include patterns already printed, or be laminated unprinted, or complexed, etc.
  • these gripping means are grippers, a term which will be used in the remainder of the description in an illustrative and non-limiting manner to designate the gripping means in general; these pliers are described in the figures 1 and 2 .
  • Each clamp preferably comprises an opening / closing system making it possible to grip or release the substrates in convoy along the transport path (or printing path). This opening / closing system is preferably controlled by computer means.
  • Each clamp generally comprises a fixed part and a movable part, or two movable parts, the movement of which makes it possible to grip or release a substrate.
  • the substrates, clamps or edges of the substrates which are located towards the output magazine are designated by the term "front”, while those located towards the input magazine are designated by the term "rear”. , with reference to the direction of movement of the substrates in the printing machine.
  • the term “lateral” denotes the elements located on either side of the longitudinal axis of the transport path.
  • the term “interlayer” denotes the grippers gripping a substrate at a level located between the front and the rear of this substrate (therefore between the front and rear grippers). It is understood that these designations are conventional and are not limiting.
  • the grippers controlled by the computer means grip each substrate in an area near the four corners of the substrate. However, depending on the configuration (in particular the control carried out by the computer means), various grippers can grip the substrates in different places, in particular on the front and rear edges and / or on the side edges.
  • the movable part of each clamp is located opposite the front of each substrate, the front being the printable face of the substrates located opposite the print heads.
  • the movable part of the grippers is located opposite the back of each substrate in convoy. This arrangement makes it possible to limit the risks of the moving part coming into contact with the printing heads.
  • the position of the print heads is generally adjustable at least in the direction of the height (perpendicular to the plane of the transport path), which makes it possible to avoid any contact between the mobile part of the grippers and the heads. printing.
  • the clamp opening / closing system is for example controlled by an electromagnet, or a system of rods.
  • a characteristic of the present invention is therefore the use of at least one mobile gripping means gripping a front part of the substrate along the transport path (by front part of the printable substrate, we will mention the two front corners of the substrate, the front edge of the substrate and / or the two side edges of the substrate close to the front edge of the substrate).
  • the present invention allows, thanks to the combined action of the mobile gripping means gripping a front part of the substrate and of the suction floor, to do without these additional mobile gripping means, which constitutes a considerable advantage over the prior art.
  • the substrate transport system comprises means for guiding the grippers, arranged for example over the entire length of the substrate transport path.
  • guide means By abuse of language, we can designate such guide means by the term motorized gripper displacement means, but the designation of guide is preferred here, in particular because the grippers can include a motor or only a passive part of the motor.
  • these means for guiding the grippers are guides, rails or slides, arranged along the transport path of the substrates.
  • the guide means form a closed circuit of which a “go” part forms the transport path and a “return” part forms a return path from the grippers to the input store.
  • each movement guide forms a closed circuit which can be for example oblong, each guide being in a plane parallel to the plane of the substrates (ie, of the transport path). In alternative embodiments, each guide is in a plane perpendicular to the plane of the substrates.
  • the substrate transport system comprises two guides comprising a plurality of grippers, each guide being disposed on either side of the substrate transport path.
  • the substrate transport system may include a plurality of guides arranged in pairs, on either side of the transport path, the distance between the guides of each pair being different to allow adaptation of the system for transporting substrates to substrates of different size, in particular of variable width.
  • the substrate transport system comprises two guides arranged on either side of the substrate transport path, the transverse spacing of which is variable and preferably controlled by the computer means, the transport system. substrates can thus be adapted to any size of substrate.
  • the substrate transport system comprises means for detecting the speed and / or position of the grippers along the transport path, said means for detecting being controlled by the computer means of the machine. impression.
  • each clamp can comprise a position sensor and / or a speed sensor connected to the computer means.
  • said speed and / or position sensors are integrated into the motorization means, said motorization means being controlled by the computer means, and allowing the grippers to move along the guides, themselves arranged along the transport path.
  • the substrate transport system comprises means for detecting the presence of the front transverse edge of the substrate, for example means for detecting the speed and / or the position of the substrates when the latter enter the substrate. transport path, for example as soon as they leave the entrance store.
  • detection means controlled by the computer means, are for example and without limitation sensors included in at least one entry store.
  • this sensor is an optical encoder or an optical ruler.
  • the system transport of substrates is therefore suitable, in certain embodiments, for detecting the presence of the front transverse edge of the substrate, for example by means of detecting the speed and / or position of the substrates and allowing the grippers to move the substrate. along the guides, to grab each substrate so as to move it along the transport path oriented along the longitudinal axis.
  • the substrate transport system is also configured to tension the substrates, the tensile force being applied by the combined action of the grippers and the suction bed, so as to facilitate their transport and increase printing precision.
  • the clamps comprise a device making it possible to apply in a controlled manner a transverse tension (ie, perpendicular to the longitudinal axis of the transport path) to the substrate, for example at the level of the opening system / closure to apply tension when closing the grippers.
  • a transverse tensioning device may for example and in a nonlimiting manner comprise suction pads which move apart transversely just before the closing of said clamps on the substrate.
  • the applied voltage is set using computer means as a function of the elasticity of the substrate and its width.
  • a longitudinal tension i.e., parallel to the longitudinal axis of the transport path
  • a longitudinal tension is applied to the substrate, as detailed below.
  • the substrate transport system comprises at least one guide on which is installed a plurality of gripping means and at least one motorization means for moving the gripping means (or grippers).
  • the movement of the clamps is controlled in pairs, each of the clamps in each pair being generally disposed at the same level along the longitudinal axis (since the substrates are generally rectangular).
  • the grippers are independent but their movement is synchronized in pairs.
  • each clamp is connected to the other clamp of the pair located on the other side of the longitudinal axis of the substrate transport path.
  • the substrate transport system is adapted to grip each substrate so as to stretch and move substrates of varying sizes along the transport path by the combined action of the gripping means and the fixed suction sole.
  • the transport system comprises at least one motorization means ensuring movement of the gripping means along the guide means, with independent displacement between at least the front gripping means and the front gripping means. rear grip; thus, by controlling the speed of the front and rear clamps, it is possible to tension the substrates whatever their size (in length in this case, the tension in width being managed by the transverse tension device).
  • the transport system comprises a single motorization means ensuring movement of the only front gripping means (s) along the guide means.
  • said at least one motorization means comprises motor means fitted to the gripping means.
  • a motor can for example equip the grippers, individually or in pairs, to move the grippers along the guide means.
  • each gripping means comprises at least one motor means ensuring its movement along the guide means.
  • said at least one motorization means comprises at least one passive part fitted to the gripping means and at least one active part fitted to the guide means.
  • the passive part integrated into the clamps allows the movement of the latter, for example controlled individually or in pairs, on the guide means which comprise the active part or, optionally, which are parallel to the active part.
  • said active part of the motorization means comprises at least one linear motor.
  • said at least one linear motor is installed on at least one rail parallel to the guide means.
  • the transport system comprises at least two guide means on which the gripping means move.
  • the transport system comprises pairs of gripping means, each comprising two gripping means located on the same side, front or rear, of the same substrate, the displacement of a pair of gripping means. gripping being provided by the same motor means, along at least one guide means.
  • the substrate transport system includes a gripper motorization means.
  • the motorization of the grippers is achieved by means of linear motors.
  • two grippers whose coordinates along the longitudinal axis are substantially the same, and which are installed on guides located on either side of the transport path, are connected to the same linear motor. It is obvious, in order not to subject the substrates to shearing forces which could induce their deformation or their tearing, that the speed of the grippers having gripped the same substrate is synchronized.
  • the linear motors are installed on at least one rail parallel to the guides on which the clamps are installed. In some embodiments, the linear motors are integrated with the guides. For example and in a nonlimiting manner, only the passive part of the linear motorization is associated with at least one clamp, the active part being installed on each guide or on a rail parallel to the guides, depending on the embodiments.
  • the suction bed is of adjustable position along an axis perpendicular to the substrate so as to optimize the distance from the substrate to the print heads of the printing machine.
  • the suction floor has a slightly curved profile so as to accentuate the longitudinal tensioning of the substrates in convoy.
  • the suction floor is transversely adjustable in order to adapt to the different widths of substrates used.
  • the computer means for example included in the printing machine, control the opening and closing of the gripping means (for example clamps and / or transverse strips), evaluate the speed and / or the position of the moving elements, and finally deliver the command and control signals of the motorization means (for example the linear motor or motors).
  • the gripping means for example clamps and / or transverse strips
  • the motorization means for example the linear motor or motors
  • Another object of the invention is to provide a method of tensioning and transporting substrates along a transport path, implemented by various embodiments of the substrate transport system described above.
  • the different successive steps characterizing this method and its possible variants according to various embodiments will now be described, with reference to figures 1 to 5 in an illustrative and non-limiting manner.
  • the printable substrate passes successively through all the stations constituting the printing machine, from the input magazine to the reception of the substrates in the output magazine, that the machine has only one printing, preferably with a drying and / or curing station [said station possibly comprising one or more drying and / or curing systems; we will cite by way of illustration UV (UV and / or LED lamps), Infra-Red, and / or near-Infra-Red radiations, the electron beam, photonic annealing, and / or two or more of these aforementioned systems in combination], or several printing or personalization stations known per se.
  • the computer means control the opening and closing of the gripping means, evaluate the speed of movement of the mobile elements, and deliver the command and control signals of the motorization means (for example linear motors) .
  • the motorization means for example linear motors
  • the speeds and / or position of the gripping means are generally known due to the fact that the latter are actively controlled, which are only passive. . It is then possible to do without means for detecting the gripping means, although it is generally preferred to add them to ensure the correct operation of the system and to avoid damaging the elements of the system.
  • the grippers successively grip the substrate as it enters the transport path.
  • the clamps can be positioned beforehand with respect to each other as a function of the respective positions at which they must grip the substrate (according to the configuration controlled by the computer means, for example).
  • the transverse distance between two guide means located on either side of the longitudinal axis of the transport path is variable.
  • the method may therefore include at least one step of adjusting this distance between the guide means, for example as a function of the sizes of substrates present on the transport path.
  • the method comprises a step of transversely tensioning the substrate, carried out by transverse tension means included in the gripping means and controlled by the computer means. This step is generally carried out during, or following, the closing of the gripping means.
  • the invention allows longitudinal tensioning of the substrates, and this, advantageously, whatever their sizes.
  • the step of tensioning the substrate by the combined action of the suction floor and of the gripping means is carried out by the computer means by controlling the speed of the gripping and suction means of the suction sole; this control could obviously depend on the physical characteristics of the substrate.
  • the figures 1 and 2 schematically illustrate a first embodiment of the invention, namely an embodiment using grippers as gripping means.
  • the figure 1 two front clamps on which the substrate is tacked; the substrate is moved on the suction floor located in the center of the figure.
  • the figure 2 illustrates 3 different views of the printing module according to an embodiment conforming to that of the figure 1 .
  • the figures 3 to 5 schematically illustrate other embodiments of the invention.
  • the gripping means acts by pinching; the substrate is moved on the suction floor located at the center of the figure; you can also see ejection belts or rollers (1).
  • the figure 4 illustrates 3 different views of the printing module according to an embodiment conforming to that of the figure 3 .
  • We can observe on the figure 4 the suction floor (1), the pinch bar (2), the guides (3) of the mobile gripping means and the linear motor (4).
  • the figure 5 illustrates the operating principle of the pinch bar: you can observe the pinch bar (1), the suction floor (2) and the substrate (3).
  • the relative height between the pinch bar and the suction bed is adjustable to suit different thicknesses and hardnesses of substrates.
  • this pinch bar is first in the open position and the substrate abuts and aligns itself against this bar, the bar is then closed on the substrate and clamps the top substrate against the sole with a force substantially greater than the frictional force generated by the suction hearth on the substrate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ink Jet (AREA)
  • Handling Of Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (16)

  1. System zum Transport von Substraten in einer Druckmaschine, die eine Druckstation umfasst, entlang eines Transportwegs von zumindest einem Eingangsmagazin, das bedruckbare Substrate bereitstellt, zu zumindest einem Ausgangsmagazin, das die Substrate aufnimmt, umfassend ein bedruckbares Substrat,
    1. ein Eingangsmagazin zum Lagern des bedruckbaren Substrats,
    2. ein optionales System zum Transportieren des Substrats vom Eingangsmagazin zu einem Saugboden (1),
    3. einen festen Saugboden unter der Druckstation, der es ermöglicht, die Substrate flach auf dem Boden zu halten,
    4. ein bewegliches Greifmittel (2), das einen vorderen Teil des Substrats entlang des Transportwegs ergreift,
    5. ein Führungsmittel (3) zum Führen des Greifmittels entlang des Transportwegs,
    6. ein Motorisierungsmittel (4), das eine Verschiebung des Greifmittels (2) entlang des Führungsmittels (3) gewährleistet,
    7. ein optionales System zum Transportieren des bedruckten Substrats vom Saugboden zum Ausgangsmagazin,
    8. ein Ausgangsmagazin zum Lagern des bedruckten Substrats, wobei das System zum Transport von Substraten dazu ausgelegt ist, jedes Substrat so zu bewegen, dass es auf dem festen Saugboden (1) entlang des Transportwegs verschoben wird, und
    dadurch gekennzeichnet, dass die Querabmessung des Saugbodens zumindest der Querabmessung des Substrats entspricht und dass der feste Saugboden die Verschiebung des Substrats ermöglicht, während es flach gehalten wird.
  2. System zum Transport von Substraten in einer Druckmaschine nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass der Saugboden eine Längsausnehmung umfasst, in der das bewegliche Greifmittel angeordnet ist.
  3. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Druckmaschine nach der Druckstation eine Station zum Aushärten und/oder Trocknen der Tinte umfasst.
  4. System zum Transport von Substraten in einer Druckmaschine nach dem vorangehenden Anspruch, dadurch gekennzeichnet, dass es Folgendes umfasst:
    1. einen festen Saugboden unter der Tintenaushärtungs- und/oder -trocknungsstation, der es ermöglicht, die Substrate flach auf dem Boden zu halten, wobei der Boden vorzugsweise eine Querabmessung aufweist, die zumindest der Querabmessung des Substrats entspricht, und
    2. ein bewegliches Greifmittel zum Bewegen des bedruckten Substrats auf dem festen Saugboden unter der Aushärtungs- und/oder Trocknungsstation.
  5. System zum Transport von Substraten in einer Druckmaschine nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass der feste Saugboden zum Flachhalten des Substrats und das bewegliche Greifmittel zum Bewegen des Substrats unter der Druckstation und unter der Trocknungs- und/oder Aushärtungsstation identisch sind.
  6. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die vertikalen Abmessungen des beweglichen Greifmittels, die sich oberhalb des Substrats befinden, weniger als 80 % des Abstands zwischen der Substratoberseite und den Druckköpfen der Druckstation, beispielsweise weniger als 4 mm, 3 mm, 2 mm und sogar weniger als 1 mm, betragen.
  7. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das bewegliche Greifmittel einen Greifer zum Ergreifen des Substrats umfasst, wobei der Greifer einen festen Teil, der sich gegenüber der Substratvorderseite befindet (wobei die Vorderseite die bedruckbare Seite des Substrats ist), und einen beweglichen Teil, der sich gegenüber der Substratrückseite befindet, umfasst.
  8. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der feste Saugboden zumindest in seiner oberen Schicht, die mit dem Substrat in Kontakt kommt, aus einem Material gebildet ist, das das Gleiten des Substrats auf dem Boden ermöglicht, beispielsweise aus einem thermoplastischen Polymer, beispielsweise Polytetrafluorethylen.
  9. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche des festen Saugbodens eine Reibungskraft erzeugt, die eine Verspannung des Substrats bei dessen Verschiebung bewirkt.
  10. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der feste Saugboden mehrere verschiedene Saugzonen (beispielsweise verschiedene Zonen, die mit verschiedenen Kammern verbunden sind) umfasst, um die Saugleistung des Bodens in Abhängigkeit von der Positionierung des Substrats zu steuern.
  11. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Greifmittel Greifer und/oder Querleisten sind.
  12. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass es nur das (die) vorderen Greifmittel als Greifmittel und nur ein einziges Motorisierungsmittel, das die Verschiebung des (der) einzigen vorderen Greifmittel(s) gewährleistet, umfasst.
  13. System zum Transport von Substraten in einer Druckmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass es Informatikmittel umfasst, die es ermöglichen, ein oder mehrere Elemente des Systems, beispielsweise den Saugboden und/oder die beweglichen Greifmittel und/oder die Druckstation, zu steuern.
  14. Verfahren zum Transportieren von Substraten entlang eines Transportwegs, das durch das System zum Transport von Substraten nach einem der vorangehenden Ansprüche realisiert wird, dadurch gekennzeichnet, dass es die folgenden Schritte aufweist:
    a) Lagern eines bedruckbaren Substrats in einem Eingangsmagazin,
    b) Verschieben und Flachhalten des Substrats auf einem Saugboden (1),
    c) Positionieren eines Greifmittels (2) durch das Motorisierungsmittel (4) in einem Bereich in der Nähe des Eingangsmagazins,
    d) nach einer Erfassung des Vorhandenseins der vorderen Querkante des Substrats in Bezug auf die Verschiebungsrichtung, Ergreifen zumindest einer dem vorderen Teil des Substrats nahen Kante des Substrats durch das Greifmittel (2), wobei das Greifmittel (2) das Substrat auf dem festen Saugboden (1) durch die Druckstation bewegt,
    e) Freigeben des Substrats durch das Greifmittel (2), wenn sich die Position des Substrats in einem Bereich nahe dem Ausgangsmagazin der Druckmaschine befindet,
    f) Lagern des bedruckten Substrats im Ausgangsmagazin,
    g) Zurückführen des Greifmittels (2) in einen Bereich nahe dem Eingangsmagazin.
  15. Verfahren zum Transportieren von Substraten nach Anspruch 14, dadurch gekennzeichnet, dass die vom beweglichen Greifmittel ausgeübte Zugkraft zum Verschieben des Substrats zumindest größer als die Kraft zum Halten des Substrats auf dem festen Saugboden ist.
  16. Verwendung eines Verfahrens nach einem der Ansprüche 14 und 15 in einer Druckmaschine ohne Kontakt mit dem Substrat, beispielsweise in einer Tintenstrahldruckmaschine.
EP15777661.8A 2014-10-08 2015-10-05 Vorrichtung und verfahren zum transport von substraten in einer druckmaschine Active EP3204235B1 (de)

Applications Claiming Priority (2)

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EP14290304 2014-10-08
PCT/EP2015/072932 WO2016055411A1 (fr) 2014-10-08 2015-10-05 Dispositif et procédé, de transport de substrats dans une machine d'impression

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EP3204235B1 true EP3204235B1 (de) 2021-02-17

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WO2014136512A1 (ja) * 2013-03-06 2014-09-12 富士フイルム株式会社 画像形成装置

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DE19901698B4 (de) * 1998-02-11 2008-01-24 Heidelberger Druckmaschinen Ag Vorrichtung zum Transport von Bogen oder Falzprodukten
JP5369760B2 (ja) 2009-03-02 2013-12-18 セイコーエプソン株式会社 吸引プラテン機構および液滴吐出装置
JP5471205B2 (ja) 2009-09-07 2014-04-16 株式会社リコー 画像形成装置
JP2011136509A (ja) 2009-12-28 2011-07-14 Sony Corp 記録装置及びライン型液体吐出記録装置
JP5529089B2 (ja) * 2011-08-29 2014-06-25 富士フイルム株式会社 記録媒体搬送装置及び画像形成装置
FR2989311B1 (fr) 2012-04-17 2021-01-22 Mgi France Dispositif et procede de transport de substrats dans une machine d’impression
DE102012103533A1 (de) 2012-04-20 2013-10-24 Köra-Packmat Maschinenbau GmbH Vorrichtung zum Fördern eines Substrats und System zum Bedrucken eines Substrats
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WO2004013704A1 (de) * 2002-07-30 2004-02-12 Ebe Hesterman Satellitendruckmaschine
ES2392224A1 (es) * 2010-10-29 2012-12-05 Tecglass Sl Dispositivo de transporte de vidrio por ventosas motorizadas mediante un actuador lineal de alta precisión.
WO2014136512A1 (ja) * 2013-03-06 2014-09-12 富士フイルム株式会社 画像形成装置
EP2965917A1 (de) * 2013-03-06 2016-01-13 Fujifilm Corporation Bilderzeugungsvorrichtung

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WO2016055411A1 (fr) 2016-04-14
EP3204235A1 (de) 2017-08-16
US20170291436A1 (en) 2017-10-12

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