• 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:
    Ink pumping system for printers, comprising an ink inlet (8) and a driving means for sending the ink (1) through an outlet (9), wherein the driving means comprises a diaphragm pump (2). ), in combination with a volumetric pump (3) with gears (13) to drive a fluid (4), by means of which the diaphragm pump (2) that drives the ink (1) from the inlet (8) to the exit (9). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2644171A1
    申请号:ES201630688
    申请日:2016-05-27
    公开日:2017-11-27
    发明作者:Ramón SERRATOSA JORDÀ
    申请人:Lr Converting Peripheral Products S L；LR CONVERTING PERIPHERAL PRODUCTS SL；
    IPC主号:
    专利说明:

    INK PUMPING SYSTEM FOR PRINTERS 5 Technical sector
    The present invention is related to the feeding of inks in printing machines, particularly those of flexographic type, proposing an ink pumping system for said machines, with which a perfect control of the ink flow is achieved.
    10 that is pumped. State of the art
    Flexographic printing machines need ink flow control that is
    15 uses, since, due to the speed of printing, if not enough ink reaches the print media, the printing color is poor, while if too much ink arrives, an unwanted excess or overflow of the soiling ink is obtained The printing machine.
    20 Therefore, it is necessary that such printing machines produce a pumping of the printing ink at a constant flow rate and that said flow rate can be regulated to adapt it to the needs of each printing.
    The use of pumps is known for this function of pumping printing inks.
    25 volumetric gears, which allow to drive a constant volume of the inks; but because the printing inks are abrasive products, being in contact with the gears of the pumps deteriorate them. On the other hand, at the end of each process of using the printing machines it is necessary to clean them, since if not the remains of the inks used are dried and block the pumping mechanism. And also the
    30 printing inks are not clean liquids, but have abrasive particles in suspension, which can also block the pumping mechanism as well as wear it. These drawbacks are of particular relevance, since these types of pumps are difficult and expensive to repair.
    35 The use of diaphragm pumps, pneumatically operated, with


    which printing inks do not come into contact with the pump drive mechanism, but only with the diaphragms of the pumps, which are easy to change if they are damaged by abrasion. However, the volume of the inks to be moved is heavy, and while the operating air of the pumping system is compressible, the
    5 flow of the ink being pumped is not constant. To try to compensate for such a disadvantage so that the flow is constant, the use of highly expensive electronics in flexographic printing machines is required. Object of the invention
    In accordance with the present invention, a pumping system is proposed, with which ink can be pumped into the printing machines with a perfect constant flow control, the flow being further adjustable, and in conditions of perfect safety against electrical components of the printing machine.
    This pumping system object of the invention comprises a diaphragm pump, in combination with a volumetric gear pump that drives a non-compressible fluid, preferably a liquid, such as water or oil, by which the pump drive is operated. of diaphragm which is the one that directly pumps the ink.
    20 In this way the ink that is pumped is driven by the diaphragm pump, which is operated without alterations of the drive, regardless of the volume of ink to be boosted, since the drive means of said pump is incompressible and also said means is steadily driven by the volumetric pump with
    25 gears
    On the other hand, with this system the printing inks to be pumped do not come into contact with the mechanism of the volumetric pump with gears, which avoids the problem of abrasion of the elements of said pump and, therefore, the costs high repair
    30 or replacement thereof; It is therefore not necessary either to clean the gears every time the printing machine is used, to prevent drying of the remains of the inks used to clog that volumetric pump with gears.
    By regulating the speed of rotation of the gears of the volumetric pump, on the other hand, the amount of ink that is pumped can be controlled, thus allowing a simple and


    precise regulation of the volume of ink needed in each printing process.
    Therefore, the system of the invention results from very advantageous features for the function of pumping printing inks to which it is intended, acquiring its own life 5 and preferential character with respect to conventional systems that are conventionally used for the same application . Description of the figures
    10 Figure 1 shows schematically an embodiment of the pumping system object of the invention, with the diaphragm pump in a position of the pumping process.
    Figure 2 is a representation of the same example of the pumping system, with the diaphragm pump in an inverse position of the pumping process. 15 Detailed Description of the Invention
    The object of the invention relates to a pumping system, for pumping ink (1) in printing machines, particularly for flexographic printing machines, although with
    In general, it is applicable in any printing machine that requires a constant flow supply of the printing inks (1).
    The system according to the invention has drive means comprising a diaphragm pump (2), in combination with a volumetric pump (3) with gears (13), in
    25 where the volumetric pump (3) is configured to drive a non-compressible fluid (4), preferably a liquid, such as water or oil, such that by means of the fluid (4) driven by the volumetric pump (3) with gears ( 13) the diaphragm pump drive (2) is actuated, which drives the ink (1) to be pumped.
    The diaphragm pump (2) has membranes (5), each arranged between a first chamber (6) filled with the fluid (4) that is driven by the volumetric pump (3), and a second chamber (7) that is filled with the ink (1) to be pumped, which arrives through an inlet (8) and out through an outlet (9).
    35 In that concept, according to a practical embodiment, as seen in example no


    limiting represented in the figures, the diaphragm pump (2) has a piston (10) carrying the membranes (5) at its ends, said membranes (5) being arranged between the respective first chambers (6) communicated with the volumetric pump (3) and the respective second ink chambers (7) (1) that communicate with the common ink inlet (8) (1) and the common ink delivery outlet (9) (1), providing each of the second chambers (7) of unidirectional valves (11) and (12) in communication with the inlet (8) and with the outlet (9), respectively.
    With said embodiment, as seen in Figure 1, when the fluid (4) driven by the gears (13) of the volumetric pump (3) reaches the first chamber (6) of one of the membranes (5) of the diaphragm pump (2), said membrane (5) moves towards the respective second chamber (7) on the other side thereof, causing in said second chamber (7) a pressure that causes the respective communication valve (11) with the inlet (8) close the passage preventing the arrival of ink (1) and that the respective valve (12) communicating with the outlet (9) open the passage for sending ink (1); while for the same displacement effect and moving synchronously by the union with the plunger (10), the other membrane (5) moves causing a depression in the respective second chamber (7) that causes the valve (12) respective communication with the output (9) close the ink passage (1) and that the respective valve (11) communication with the input (8) open the ink passage (1), filling that second chamber
    (7) ink (1).
    In an immediate subsequent cycle of the pumping process, as seen in Figure 2, the direction of the fluid (4) that is driven by the gears (13) of the volumetric pump (3) is modified, said fluid being sent (4) towards the respective first chamber (6) of the membrane (5) whose respective second chamber (7) is filled with ink (1), whereby an inverse cycle to the previous one occurs, that is, the second chamber (7) is emptied ) which is full, sending the ink (1) through the outlet (9), while the second chamber (7) of the other membrane (5) is filled with ink (1) that arrives through the inlet (8). Thus, by continuously repeating reverse cycles such as those mentioned, a continuous pumping of ink (1) is obtained, with a constant flow rate that can be regulated by varying the speed of rotation of the gears of the volumetric pump (3).
    The alternation of the fluid delivery direction (4) that is driven by the pumpvolumetric (3), can be obtained, for example, by alternating the direction of operation of


    rotation of the gears (13) of said volumetric pump (3), by any means of alternating control; or by means of a controlled means of opening and closing of gates that allow the liquid (4) to reach where it is necessary in each cycle of the pumping system; solutions that are not limiting, and can be used
    5 also any other solution that allows to obtain the same effect of alternate delivery of the fluid (4) to actuate the movement of the piston (10) in two opposite directions.
    Also, the fluid (4) is movable according to a closed circuit, as corresponds to the embodiment shown in the figures. That is, the fluid (4) is
    10 movable only between the volumetric pump (3) and the first chambers (6). Alternatively, the fluid (4) is movable according to an open circuit, that is, the fluid (4) is also in communication with an additional reservoir (not shown in the figures) for an additional supply of the fluid (4) required to maintain the desired flow of ink (1) injected. In this way, it is possible to counteract possible leaks of the fluid (4).
    The pumping system object of the invention can be used to pump the ink (1) to printing means of the printing machines, such as printing rollers, and to aspirate or recover the ink (1) pumped to said printing means. which is surplus or surplus, thus preventing printing machines from being
    20 dirty. Accordingly, a printing machine preferably comprises a pumping system for pumping the ink (1) to the printing means or for suctioning the excess ink (1) pumped to the printing means, and more preferably comprising two pumping systems, one for the pumping of the ink (1) to the print media and the other for the aspiration of the ink (1) left over to the
    25 print media.

    权利要求:
    Claims (2)
    [1]
    1.-Ink pumping system for printers, comprising an ink inlet (8) (1) and driving means for sending the ink (1) through an outlet (9), characterized in that the
    5 driving means comprise a diaphragm pump (2), in combination with avolumetric pump (3) with gears (13), the volumetric pump (3) being configuredto drive a fluid (4) by which the diaphragm pump (2) that drives is actuatedthe ink (1) from the input (8) to the output (9).
    10 2. Ink pumping system for printers, according to claim 1, characterized in that the diaphragm pump (2) has membranes (5), each arranged between a filling chamber (6) with the fluid (4) that is driven by the volumetric pump (3) with gears (13) and a chamber (7) that is filled with the ink (1) to be pumped.
    3. Ink pumping system for printers, according to claim 1 or 2, characterized in that the fluid (4) is incompressible.
    [4]
    4.-Ink pumping system for printers, according to claim 3, characterized in that the fluid (4) is selected from water and oil.

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    同族专利:
    公开号 | 公开日
    WO2017203082A1|2017-11-30|
    ES2644171B1|2018-07-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4856427A|1986-04-11|1989-08-15|Baldwin Technology Corp.|Ink metering assembly|
    WO1997010902A1|1995-09-22|1997-03-27|Snyder Guy Thomas Jr|Method and apparatus for reversibly pumping fluids|
    EP1077140A1|1999-08-16|2001-02-21|Riso Kagaku Corporation|Stencil printer|
    DE10133349A1|2001-07-15|2003-01-23|Harald Janzen|Membrane pump used in printing machines comprises two double-membrane pumps each having a housing with pump chamber flanges and a traverse lying in between which are crossed over in each other|
    US20050275682A1|2003-03-31|2005-12-15|Seiko Epson Corporation|Liquid ejecting apparatus|
    CN110805546A|2019-11-08|2020-02-18|西安石油大学|Novel gear reversing abrasion-reducing type diaphragm pump|
    法律状态:
    2018-07-30| FG2A| Definitive protection|Ref document number: 2644171 Country of ref document: ES Kind code of ref document: B1 Effective date: 20180730 |
    2021-10-01| FD2A| Announcement of lapse in spain|Effective date: 20211001 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201630688A|ES2644171B1|2016-05-27|2016-05-27|INK PUMPING SYSTEM FOR PRINTERS|ES201630688A| ES2644171B1|2016-05-27|2016-05-27|INK PUMPING SYSTEM FOR PRINTERS|
    PCT/ES2017/070342| WO2017203082A1|2016-05-27|2017-05-23|Ink pumping system for printers|
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