• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Machine and procedure of digital printing on glass (4) mono-passed with sliding glass. The machine has a base structure (55) with means for the positioning (1) of the glass and a sub-system for transporting suction cups (3) of said glass (4) under printing structures (5) located on said base structure (55) The printing structure incorporates a digital printing medium (33) with a printing bar (100) with a succession of print heads (10, 10 ', 10 ") covering the entire effective width of the machine. The machine incorporates a graphic assistance means to detect printing defects. The procedure is executed by moving the glass (4) under the print heads (10, 10 ', 10 ") and detecting the position data of the printing defects (X", Y "), and subsequently moving the glass with selective printing of the print heads over the defect positions (X ", Y"). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2664112A1
    申请号:ES201631210
    申请日:2016-09-16
    公开日:2018-04-18
    发明作者:Juan Javier FERNANDEZ VAZQUEZ；Manuel RAMOS QUIROGA
    申请人:Tecglass SL；
    IPC主号:
    专利说明:


    DIGITAL PRINTING MACHINE AND PROCEDURE ON MONO-PASSED GLASS WITH GLASS DISPLACEMENT

    OBJECT OF THE INVENTION 5

    The object of the present invention consists of a method and a digital ink printing machine on mono-pass glass with displacement of the plate or sheet of glass to be printed, which employs 10 digital printheads, and which can also act as multi -pass for the correction of printing defects detected after printing, or for more complex printing.
     fifteen
    BACKGROUND OF THE INVENTION

    In the state of the art of digital printing machines on glass, multi-pass machines comprising a printing carriage that travels along a bridge located on the "X" passage of a sheet of glass are frequent. it is placed and moved on a table (see patent ES2.337.829T3), and said bridge (and therefore the displacement "Y" of the printing carriage) transversal or perpendicular to step 25 "X" of the glass to be printed as described in the patent ES2,396,532. Technology is also known in which the bridge travels in the "X" direction (with "Y" transverse displacement of the print carriage) while the glass is held in a fixed position. In these cases, there is a print car that has to print the glass in several passes moving said car along the width of the bridge that supports it.

    These machines are commonly called multi-pass, or "multipass", since, in general, they print in the following way: the glass is placed in the printing position and the bridge moves in the "X" direction to the glass (or the glass moves "X" on the table until the part to be printed under the bridge), the carriage begins to move across the width "Y" 10 of the bridge while printing on the glass (making a passed on the glass), then the glass, or the bridge, moves in the "X" direction the width of the print head and the carriage returns to print in the "Y" direction and so on until the end of the printing on the glass to be printed. There are variants of multi-pass printing as described in EP2631077.

    In short, the multi-pass procedure is a method of printing by means of which the head makes several passes depending on the resolution that is to be achieved to make the printing on the glass. The machines that execute this multi-pass procedure usually consist of a print carriage with several 25 printheads, of dimensions smaller than the maximum format to be printed on the glass sheet and, therefore, the only way to cover the maximum format It is making multiple passes on the glass sheet or substrate to be printed. This number of passes, as already indicated, will be greater or lesser depending on the resolution that is intended to be achieved.

    Multi-pass digital printing machines have economic advantages when using small print carts with few print heads. Also, when executing multiple passes, they may be able to hide a print defect caused by a head, since the failure of the first pass can be covered by a second pass (see patent document US2014 / 0204426).

    On the contrary, these machines, having to make several print passes of the print carriage, the printing time is extended proportionally to the number of passes to be executed.

    Current printing machines that, on the contrary, execute single-pass digital printing procedures in which the glass to be printed moves under printing heads usually have a number of drawbacks:
     twenty
    - In the event that the substrate has already passed through the machine and there has been a defect in printing, it is no longer impossible to pass it exactly along an identical path with the precision required to be able to correct defect 25 with a print located on The defect identified. Therefore, current single-pass machines usually leave any printing defect very evident. For example, in the industrial sector of ceramics, where the substrate to be printed is opaque, the substrate to be printed is usually moved, and hot printing occurs (over 40 degrees) and for limited dimensions (maximum 1.5 x 1.5 meters)

    - To print in mono-pass on glass it is necessary a great precision in the positioning and in 5 the systems that move the substrate, which is highly complex.

    A solution to these inconveniences is provided by the patent application P201531665 of the same applicant as the present one in which a single-pass machine and procedure is described that allow several passes to be corrected for any defect detected after the mono-pass. Said machine acts as a mixed printing machine. When it acts as a mono-15 pass (or “singlepass”), the glass sheet to be printed is placed in the printing position by automatic positioning. A printing bridge makes a pass (in the "X" direction; longitudinal axis of the machine) above the glass sheet, which is placed statically, printing all the glass upon completion of the pass. For this, the bridge incorporates along its width printing means that cover the width of glass, or sheet of glass, to be printed. Such a machine and procedure result in a high productivity mono-pass technique, since it can print a glass sheet several times faster than the classic multi-pass machines.

    DESCRIPTION OF THE INVENTION 30

    The machine and method object of the present invention overcome the disadvantages of the multi-pass and mono-pass printing machines described above, and represents an alternative to the machine and procedure of the patent application P201531665 of the same applicant, also incorporating some features additional techniques to the latter as multi-pass and mono-pass printing described above, and represents an alternative to the machine and procedure of patent application P201531665 of the same applicant, also incorporating some additional technical features to the latter as multi-pass printing and single-pass described above, and represents an alternative to the machine and procedure of patent application P201531665 of the same applicant, also incorporating some additional technical characteristics to the latter as

    The mono-pass machine object of the present invention allows several passes to correct any defect detected after a mono-pass or to print any design that due to its complexity cannot be performed in mono-pass. Therefore, it acts as a mixed printing machine. When it acts as a mono-pass (or “singlepass”), the sheet of 15 glass to be printed is placed and fixed on a suction system sub-system. The suction cup sub-system transports said glass sheet in the "X" direction (longitudinal axis of the machine) under printing means incorporating printing bars covering the width of the glass, or glass sheet, to be printed . The print media remains fixed to a printing structure of the printing machine.

    The advantage of this new machine and last mono-25 procedure is its high productivity, since it can print a sheet of glass several times faster than the classic multi-pass machines. For example, with the machine object of this patent, the glass can be printed in single pass at a speed of 300 mm / second 30 in the most complex cases and up to a speed of 1,100 mm / second in the simplest cases. Another advantage is that you can print more precisely and accurately than the current mono-pass printing machines, since the glass is attached to the suction conveyor sub-system allowing repeated identical paths of the glass sheet under the printing means. In addition, as indicated above, it is accurate that the current single-pass printing machines be the glass attached to the suction system sub-system allowing repeated identical paths of the glass sheet under the printing means. In addition, as indicated above, it is accurate that the current single-pass printing machines be the glass attached to the suction system sub-system allowing repeated identical paths of the glass sheet under the printing means. In addition, as indicated above, it is accurate that the current single-pass printing machines be the glass attached to the suction system sub-system allowing repeated identical paths of the glass sheet under the printing means. In addition, as indicated above, it is accurate that the current single-pass printing machines be the glass attached to the suction system sub-system allowing repeated identical paths of the glass sheet under the printing means. In addition, as indicated above,
     fifteen
    When a defect has occurred during mono-pass printing on the machine object of the present invention, since the glass sheet is attached to the suction cup sub-system that can make several identical paths in both directions of the direction. "X", said defects can be detected by means of graphic assistance connected to a central processing and control unit of the printing machine configured to order the suction conveyor sub-system to move the glass sheet 25 making, the glass, at least one additional high precision pass under the printing means to correct the detected defects. These graphic assistance means can be of the optical type installed in the printing machine (for example in the 30 printing structures of the machine, or in a specific structure) that analyze the printed image, for example against a reference pattern, and Detect defects.

    Moreover, either after the complete single-pass printing has been carried out, or during printing, or even 5 after a defect correction one-pass, if the means of graphic assistance (or quality control) detects any error , prevents the release of the glass sheet towards the unloading zone of the machine, and through the processing and control unit produces a displacement of the glass sheet towards the loading area to make a defect rectification pass detected; and if no defects are detected (the scanner can take high-precision photographs of the printed glass) with respect to the reference or pattern to be printed, the means arranged for the ejection of the glass from the machine are activated. This operation can be semi-automated, so that the expulsion of the printed glass must wait for a confirmation from the operator, in case it is decided to opt for a manual inspection. 20 That is to say, it can be an operator who, when detecting a defect visually, activates a new printing pass before authorizing the expulsion of the glass from the machine.
     25
    Therefore, the printing machine object of the present invention is a mixed printing machine that can work in single-pass, or multi-pass mode if any detected defect needs to be corrected or a design of certain complexity or precision is required that 30 requires the machine to work in two or more passes.

    With this machine you get a number of advantages:

     5
     twenty
    For example, the industries of manufacturers of automotive glass in series or glass for white goods (oven doors, kitchen countertops, etc.) can be converted, with this machine, to digital printing gaining in flexibility. 25

    More specifically, in terms of its components, the mono-pass glass digital printing machine object of the present invention has:
     30


     10



     25
     30

    Only the heads of the printing bars they are printing are in contact with the air, those of the resting bars are in their corresponding protection station.
     5

    The print heads of the printing means make a controlled print, by a central processing unit and control of the machine, continuously on the glass when said glass is displaced ("X") by the transport sub-system Suction cups

    The digital printing means may be accompanied by ink drying radiation emission devices (for example laser technology or infrared lamps) controlled by the central processing and control unit of the machine.

    The suction conveyor sub-system may be constituted by commercial suction cups known in the state of the art of this sector, or be as described in patent ES2,392,224 of the same applicant.
     fifteen




    The machine can also incorporate artificial vision means for capturing and automatically sending the data of the outer perimeter (X, f (X)) of the glass sheet, said data being sent to the central processing and control unit of data.

    The central unit of processing and data control of the machine is composed of at least one module with the position data of the pattern (X ', Y') or figure to be printed and its colors (C '(X', Y ' )), a module with the position data of the printing defects (X ”, Y”) and their corresponding colors (C ”(X”, Y ”)) (which correspond to the colors of the pattern (C” ( X ”, Y”) = (C '(X', Y '))) on the glass sheet, and optionally a module for receiving the data of said artificial vision means for automatically capturing the data of the outer perimeter of the glass sheet, a data processing software that arrives at the central unit of data processing and control and determination of the position information of the print heads with respect to the printing coordinates (X ', Y') , optionally glass sheet, a data processing software that arrives at the central processing unit and continues role of data and determination of the position information of the printheads with respect to the printing coordinates (X ', Y'), optionally glass sheet, a data processing software that arrives at the central processing unit and data control and determination of the printhead position information with respect to the printing coordinates (X ', Y'), optionally glass sheet, a data processing software that arrives at the central processing unit and data control and determination of the printhead position information with respect to the printing coordinates (X ', Y'), optionally glass sheet, a data processing software that arrives at the central processing unit and data control and determination of the printhead position information with respect to the print coordinates (X ', Y'), optionally

    The invention presents a stage for feeding, positioning and fixing the glass in the suction transport sub-system, a complete and continuous displacement stage ("X" direction) of the glass sheet displaced by the sub-system of transport of 20 suction cups, with simultaneous printing of the printheads that print a pre-selected pattern for each glass to be printed, printing only the printhead heads that are placed on the glass based on the color data (C '(X', Y ')) and position (X', Y ') of the figure to be printed supplied by the central processing unit. The information that the printheads have to print can also be provided by the file to be printed, which can be sent by the customer making the order. 30 digital printing process object of the present invention, with the machine object of the present invention

    In addition, the procedure can be carried out with a step of detecting the defect position data (X ", Y") of printing on the glass sheet, which can be performed simultaneously during the printing stage, for example by scanning made by the graphic assistance means supported by a printing structure or a specific structure (X ", Y") of printing on the glass sheet, which can be performed simultaneously during the printing stage, for example by scanning performed by the graphic assistance means supported by a printing structure or a specific printing structure (X ", Y") on the glass sheet, which can be performed simultaneously during the printing stage, for example by scanning performed by graphic assistance media supported by a specific print structure or structure

    After the defect detection stage, at least one stage of complete displacement of glass 10 occurs under the printing means with simultaneous and selective printing of the printheads that will print on the defects (X ", Y") detected in the glass and according to the corresponding color data (C "(X", Y ")). That is, if the means of graphic assistance and quality control 15 detect any error in printing, the printing sheet is not left in the unloading area and sent back to perform an additional defect correction pass (therefore, the machine can act as multipass).

    At any time, during any of the previous stages, through the means for extracting and loading the digital printing medium, the printing bars that have not been assigned by the central processing and control unit can be removed or changed for Print during these stages.

    The drying stage of the printed ink can be carried out simultaneously with the printing. For this, as already indicated, the machine object of the present invention can incorporate, in addition to the printheads, in addition, devices for drying the ink printed on the surface of the glass with technology, for example, laser and / or infrared lamp. Said drying devices are controlled by the central processing and control unit, which is configured by associating the print signal of each head with a print on the glass surface with technology, for example, laser and / or infrared lamp. Said drying devices are controlled by the central processing and control unit, which is configured by associating the print signal of each head with a print on the glass surface with technology, for example, laser and / or infrared lamp. Said drying devices are controlled by the central processing and control unit, which is configured by associating the print signal of each head with a

    If the printheads and the lasers and / or infrared lamps are placed together, it is achieved that the laser and / or infrared lamp cover and dry the entire printing width on each pass of the bridge on the glass surface . Thus, the heads deposit the ink and immediately, and simultaneously, the laser beam and / or the infrared lamp dry the deposited ink.

    The method object of the invention, therefore, also allows a single stage of digital printing (mono-pass) with simultaneous drying of the print 20 by means of the laser and / or simultaneous infrared lamp fixed to each printhead, for the correction of defects through multi-passes of the bridge and printing of very complex multi-pass designs, and optionally also a final tempering stage of the glass with vitrification of the ink applied.

    The machine object of the present invention can employ a series of components common in machines such as motors, electronics, electricity and pneumatics known in the prior art. Being able to use commercial inkheads that also use commercial printing inks (for example, the printhead can be of the DROP-ON-DEMAND type of technology) lowers the maintenance and operation costs of the machine, providing great flexibility in the Supply of key components and cost savings.
     5
    Finally, several machines such as the one described above can be arranged in a series sequence in case you need to make several multi-layer prints. This is achieved thanks to the positioning device of the glass sheet that is of high precision with a stop driven by a linear micrometric positioning motor. Therefore, each stop is driven by a linear micrometric positioning motor configured to allow that when the glass is positioned at the same time a dimensional control of the piece is performed. This data is recorded and controlled by the machine's data processing and control unit. In this way, the tolerances that the glass can bring from other processes or previous treatments 20 can be compensated by allowing immediate adjustment to the size of the print selected and registered in the processing and control unit. For example, if a 420 mm long x 480 mm wide glass was expected and after positioning and control it is observed that it is 420.5 mm x 25 479.5 mm, the area to be printed is automatically adjusted so that it is not printed outside the glass or alternatively the perimeter zones are left unprinted.
     30
    So:




    BRIEF DESCRIPTION OF THE DRAWINGS

    The following figures are included in order to facilitate the understanding of the invention:

     25




     10
    PREFERRED EMBODIMENT OF THE INVENTION

    A preferred embodiment of the machine object of the present invention is detailed below.
     fifteen
    In Figure 1 an embodiment of the printing machine object of the present invention is observed with its base or support structure (55) a glass or glass sheet (4) fixed to the suction system sub-system (3) in the unloading zone (6) of the machine. 20 In this figure the printing structures (5) and the carrier structure of the graphic assistance means (11) (see figure 2) are hidden by a protective housing (90).
     25
    Figure 2 shows the machine of Figure 1 without the protective housing revealing three printing structures (5) and, adjacent to the discharge zone (6), a carrier structure for graphic assistance means (11). This figure 2 shows a 30 of the printing structures (5), the closest to the loading area (60) of the glass (4), in the process of changing its printing means (33). The lower part of the print media with its print bars is shown in Figure 4. It is noted that the installed print bars that are not activated for printing are protected by a station from their print media (33) . The lower part of the print media with its print bars is shown in Figure 4. It is noted that the installed print bars that are not activated for printing are protected by a station from their print media (33) . The lower part of the print media with its print bars are shown in Figure 4. It is observed that the installed print bars that are not activated for printing are protected by a printing station.
     10
    Figure 3 shows the loading area (60) and the positioning sub-system (1) of the glass in the machine with the linear positioning motors (2) of the glass sheet (4) (not shown in this figure ). fifteen

    Figure 4 shows a digital printing medium (33) supported by one of the support structures, in this case, with six parallel print bars (for example, references 100, 100 'and 100 "), which 20 occupy the entire effective width of the machine of figures 1 to 3. Each bar has a succession of printheads (for example references 10, 10 'and 10 ") incorporating DROP-ON-DEMAND technology.
     25
    权利要求:
    Claims (6)
    [1]


    1. Digital printing machine on glass (4) mono-5 passed with glass displacement of the type comprising:
    - a loading area (60) and a discharge zone (6) of the glass sheet (4) to be treated, and 10
    - a base or support structure (55) comprising means configured for positioning (1) of said glass and a suction cup sub-system (3) configured to transport said glass (4) in the "X" direction of the longitudinal axis of the machine,
    said machine characterized by comprising:
     twenty
    to. at least one printing structure (5) located on said support structure (55), said printing structure comprising a digital printing means (33) of the glass (4), said digital printing means (33) configured to perform printing on the glass sheet (4) when said sheet is moved under the printing structure (5), said digital printing means (33) comprising at least one printing bar (100), said printing bar comprising a succession of print heads (10), and said succession of print heads (10) of each print bar (100) being fed with ink,
    b. at least one graphic assistance medium supported by a media carrier structure of graphic assistance (11) or supported by a printing structure (5), and
    C. a positioning sub-system (1) of the glass (4) in the loading area (60) comprising 10 linear motors (2) of micrometric positioning of the glass sheet (4),
    and, because said digital printing means (33) extend covering the entire effective width of the digital printing machine.

    [2]
    2. Digital printing machine according to claim 1, characterized in that said printing structure (5) further comprises extraction means 20 and loading said digital printing means.

    [3]
    3. Digital printing machine according to any one of the preceding claims, characterized in that said digital printing means (33) further comprise radiation emission devices for drying the ink.

    [4]
    4. Digital printing machine according to the preceding claim, characterized in that said drying radiation emission devices 30 are laser technology or infrared lamps.

    [5]
    5. Digital printing machine according to any of the preceding claims, characterized in that said printheads (10,10 ’) are of the DROP-ON-DEMAND type of technology.
      5
    [6]
    6. Digital printing machine, according to any of the preceding claims, characterized in that it is configured to carry out a continuously controlled printing on the glass sheet (4) during the linear and continuous displacement of the glass, and by said means of Graphic assistance are configured to automatically detect and capture the defect position data (X ", Y") of printing on the glass sheet (4) and configured to send such data, and because it also includes:
    to. A central data processing and control unit comprising:
      twenty
    i. A module configured to receive and store the position data of the pattern (X ’, Y’) and its colors (C ’(X’, Y ’)) to be printed on the glass sheet (4),
     25
    ii. A module configured to receive and store the position data of the printing defects (X ", Y") and their corresponding colors (C "(X", Y ")) on the glass sheet (4), 30
    iii. A module configured to send print signals to the print heads (10.10 ', 10 ") of the print media (33) based on the position data (X', Y ') of the pattern, defect data ( X ”, Y”) and color data (C '(X', Y '), C ”(X", Y ")) to be printed on the glass sheet (4), and print media (33) in function of position data (X ', Y') of the pattern, defect data (X ”, Y”) and color data (C '(X', Y '), C ”(X", Y " )) to be printed on the glass sheet (4), and







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    同族专利:
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    ES2664112B2|2019-05-21|
    WO2018050946A1|2018-03-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2011051133A|2009-08-31|2011-03-17|Brother Industries Ltd|Printing apparatus|
    JP5599239B2|2010-06-28|2014-10-01|富士フイルム株式会社|Inkjet printing apparatus and printing method therefor|
    EP2631077A1|2012-02-21|2013-08-28|Dip Tech. Ltd.|Printing system|
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201631210A|ES2664112B2|2016-09-16|2016-09-16|MACHINE AND DIGITAL PRINTING PROCEDURE ON MONO-PASSED GLASS WITH GLASS DISPLACEMENT|ES201631210A| ES2664112B2|2016-09-16|2016-09-16|MACHINE AND DIGITAL PRINTING PROCEDURE ON MONO-PASSED GLASS WITH GLASS DISPLACEMENT|
    PCT/ES2017/070758| WO2018050946A1|2016-09-16|2017-11-16|Machine and method for digital printing on single-pass glass with movement of the glass|
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