• 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:
    Module for crushing cardboard sheets for a digital printing machine, comprising crushing means acting transversely on a front edge of the cardboard board or the like as a cardboard board or the like is linearly moved, the means comprising crushing two rotating elements (40, 41) facing each other, such that a cardboard plate passes through both rotating elements (40, 41). A digital printing machine for cardboard sheets or the like comprises an insert station (1) for cardboard sheets or the like (P), a drag station (2) for moving the cardboard sheets (P) towards a printing station digital (3), which includes a crushing module disposed between the dragging station (2) and the digital printing station (3). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2685459A1
    申请号:ES201830098
    申请日:2018-02-05
    公开日:2018-10-09
    发明作者:Ramon SERRA OBIOL；Jordi PUIG VARGAS
    申请人:Comercial Industrial Maquinaria Carton Ondulado SL CIMCOSA；
    IPC主号:
    专利说明:

    DESCRIPTION

    Cardboard plate crushing module for a digital printing machine, digital printing machine and digital printing procedure.
     5
    OBJECT OF THE INVENTION

    The purpose of the present application is the registration of a cardboard plate crushing module for a digital printing machine, as well as a digital printing machine for cardboard plates or the like. 10

    More specifically, the invention proposes the development of a digital printing machine for cardboard sheets or the like as well as a digital printing process that aims to reduce the risk of contact between the plates to be handled and the print heads in case of deformation present On the plates. fifteen

    BACKGROUND OF THE INVENTION

    In digital printing machines of cardboard plates or similar, the printing plate passes very close to the printheads. As is well known, the printheads are delicate and sensitive to chafing or impact devices, so that the fact that the cardboard sheets pass so close represents a high risk of damage to said printheads.

    Frequently, the cardboard sheets are not perfectly flat and have folds 25 at their transverse edges, which increases the likelihood of such deformations rubbing undesirably with the printing heads. In particular, those that occur at the transverse front edge of the cardboard plate in a direction of advance thereof are especially critical.
     30
    In order to avoid damage to the heads due to the above, there are currently passive methods. These methods are essentially based on stopping printing when a control device detects projections present on the surface of the plate above a certain measure that would cause friction or impact with the print head. Once the machine is stopped, proceed to remove 35
    manually the defective plate and the printing process resumes again. However, this operating method presents a series of drawbacks, among which is the fact of stopping production, the loss of the defective plate and the possible loss of those plates that are currently in the printing area, since When the process stops, the printing may have visual defects that cause the plate to be rejected.

    DESCRIPTION OF THE INVENTION

    The present invention has been developed in order to provide a machine for digital printing of cardboard sheets or the like that is configured as a novelty within the field of application and resolves the aforementioned drawbacks, also providing other additional advantages that will be evident from the description that follows.
     fifteen
    It is an object of this invention to provide a cardboard plate crushing module for a digital printing machine, characterized by comprising crushing means that act transversely on a front edge of the cardboard sheet or the like as it travels linearly a cardboard plate or the like, the crushing means comprising two rotating elements 20 facing each other and spaced apart such that a cardboard plate is capable of passing through both elements, one of the rotating elements being a cylindrical surface body flat and the second rotating element is provided with at least one region with curvature with a protrusion protruding externally from the radius of curvature.
     25
    It is therefore another object of the present invention to provide a digital printing machine for cardboard plates or the like, comprising a station for introducing cardboard plates or the like, a drag station for moving cardboard plates or the like from the introduction station towards a digital printing station, and is characterized by the fact that a crushing module is provided that has crushing means that act transversely on a front edge of the cardboard plate or the like as it travels linearly a cardboard sheet or the like, the crushing means being arranged between the drag station and the digital printing station.

    Thanks to these characteristics, it is avoided to cause damage to the printheads present in the printing station by physical contact, in the event that an edge of the front or rear ends (in a direction of advance of the plates) presents a bending , advantageously without the need to stop the printing process of plates 5 (unlike the known technique) so that production times are not affected.

    In a preferred embodiment, the crushing means comprise two rotating elements facing each other and spaced apart such that a cardboard plate is capable of passing through both elements, one of the rotating elements being a flat surface cylindrical body 10 and the second Rotating element is provided with at least one region with curvature with a protuberance.

    Advantageously, the rotating element formed by a cylindrical body has a soft outer surface, thus avoiding damaging the surface of the cardboard plate. fifteen

    According to another aspect of the invention, the region with curvature and a protuberance form a die that is removably mounted on a rotation axis.

    It is also another object of the invention to provide a method of digital printing of a cardboard sheet or the like comprising the steps of:
    a) supplying a cardboard plate or the like on a means of movement to move the cardboard plate or the like in a forward direction;
    b) print at least one of the sides of the cardboard sheet or the like in a digital printing station, 25
    characterized by the fact that prior to the printing of the cardboard plate, said cardboard plate passes through an existing space between two rotating elements, as the cardboard plate advances towards the digital printing station, in which one of the rotating elements includes a flat surface cylindrical body and the second rotating element is provided with at least one region with curvature with a protrusion to cause a crushing or a transverse bending or even both of a portion close to the front edge of the cardboard plate or similar in one direction of advance.

    Other features and advantages of the digital printing machine for cardboard sheets or similar object of the present invention will be apparent from the description of a preferred but not exclusive embodiment, which is illustrated by way of non-limiting example in the drawings which They are accompanied, in which:
     5
    BRIEF DESCRIPTION OF THE DRAWINGS

    Figure 1.- It is a schematic elevation view of a digital printing machine of the known technique;
    Figure 2.- It is a schematic elevation view of a machine according to the present invention;
    Figure 3.- It is an enlarged detail view of the contact area between the upper and lower elements that make up the crushing means in an operative position; Y
    Figures 4a-h.- It is a sequential view of the different stages of operation of the crushing means during the printing process of a cardboard sheet or the like; Y
    Figure 5.- It is a schematic elevation view of a conventional printing station, which includes a detail view.
      twenty
    DESCRIPTION OF A PREFERRED EMBODIMENT

    In view of the aforementioned figures and, according to the numbering adopted, an example of a preferred embodiment of the invention can be observed therein, which comprises the parts and elements indicated and described in detail below. 25

    The digital printing machine for cardboard plates or the like essentially comprises an introduction station (1) for cardboard plates or the like (P), a drag station (2) for moving the cardboard plates (P) or the like from the introduction station towards a digital printing station (3). 30

    The introduction station (1) comprises a conveyor belt (10) that defines a closed loop and rotates around a series of pulleys (11), at least one of them being a driving pulley driven by an electric motor (not shown). To keep the iron
    (P) in contact with a horizontal section of the conveyor belt (10), an aspirating drawer (12) is provided. In addition, a vertical wall (13) is provided that acts as a stop to maintain a stack of cardboard sheets or the like 100).

    As regards the drive station (2), it comprises a conveyor belt (20) 5 that defines a closed loop and rotates around a series of pulleys (21) to move the plate (P) in a direction of advance represented with the arrow (F), at least one of them being a driving pulley driven by an electric motor (not shown), although another drive means can be used. In order to keep the plate (P) in contact with a horizontal section of the conveyor belt (20), an aspirating drawer (22) is also provided. 10

    The digital printing station (3) has a conveyor belt (30) driven by a plurality of pulleys (34) where the cardboard plate (P) moves horizontally, on which a plurality of print heads (31) is provided. ) with one or more colors (depending on the requirements), arranged in an aligned manner and oriented towards the cardboard plate to carry out the printing operation of one of the faces of the cardboard plate (P). The printheads (31) are housed inside a housing (32) that has an entrance region (33) where the cardboard plate (P) enters the interior of the digital printing station (3).
     twenty
    Additionally, a crushing module provided with crushing means, generally indicated by reference (4), acting transversely on a front edge of the cardboard plate or the like is provided as a cardboard plate moves linearly or similar, the crushing means being arranged between the drag station and the digital printing station. 25

    More specifically, the crushing means comprise two rotating elements facing each other, more specifically an upper element (40) and a lower element (41) and spaced apart such that a cardboard plate is capable of passing through both elements, the upper element (40) being a rotating element a cylindrical body with a flat surface while the second rotating element (41) is provided with a region with curvature (411) of constant radius that ends at one end with a protuberance (412) , as can be seen in greater detail in Figure 3.

    The axes of rotation of the respective rotating elements (40, 41) are driven by a conventional electric motor (not shown) that varies the rotation speed during a revolution to ensure that the lower element (41) is always on the same line of the cardboard plate regardless of the length of them. This is important given that in the case of digital printing, unlike what happens in the flexographic printing, the cardboard sheets are not cycled, but are in continuous, with which the distance between "deformation strokes" It varies depending on the length of the cardboard plate (P).

    The result of the "deformation stroke" is a crushing and folding of a small portion (D) of the front of the plate (P) that causes the front edge of the plate to face down, that is, towards the means of transport , in this case, the conveyor belt (30) with suction. The plate (P) deformed in this way is easily dominated by a conveyor belt with suction and transformed into a flat surface. On the other hand, if the folded portion of the front edge of the plate were oriented upwards (as shown in Figure 5), it would be difficult to aspirate the strip (30) with suction (35) to be able to orient the folded portion towards the web in order to avoid contact with the printheads (31).

    The details, shapes, dimensions and other accessory elements used in the manufacture of the digital printing machine of the invention may be conveniently replaced by others that do not depart from the scope defined by the claims set forth below.
    权利要求:
    Claims (5)
    [1]

    1. Cardboard plate crushing module for a digital printing machine, characterized in that it comprises crushing means that act transversely on a front edge of the cardboard sheet or the like as a plate moves linearly of cardboard or the like, comprising the crushing means comprise two rotating elements (40, 41) facing each other and spaced apart such that a cardboard plate is capable of passing through both rotating elements (40, 41), being one of the rotating elements a cylindrical body with a flat surface and the second rotating element is provided with at least one region with 10 curvature (411) that includes a protuberance (412) protruding externally from the radius of curvature.

    [2]
    2. Crush module according to claim 1, characterized in that the rotating element formed by a cylindrical body has a soft outer surface 15.

    [3]
    3. Crushing module according to claim 1, characterized in that the region with curvature and a protuberance form a die that is removably mounted on an axis of rotation. twenty

    [4]
    4. Digital printing machine for cardboard plates or similar, comprising an introduction station (1) for cardboard plates or the like (P), a drag station (2) for moving cardboard plates or the like (P) from the introduction station (1) to a digital printing station (3), characterized in that a crushing module according to any one of claims 1 to 3 is provided, the crushing module being arranged between the filling station Drag (2) and digital printing station (3).

    [5]
    5. Digital printing procedure of a cardboard sheet or the like comprising the 30 stages of:
    a) supplying a cardboard plate or the like on a means of movement to move the cardboard plate or the like in a forward direction;
    b) print at least one of the faces of the cardboard sheet or the like in a digital printing station,
    characterized in that prior to the printing of the cardboard plate, said cardboard plate passes through an existing space between two rotating elements, as the cardboard plate advances towards the digital printing station, 5 in the that one of the rotating elements includes a flat surface cylindrical body and the second rotating element is provided with at least one region with curvature with a protuberance to cause a transverse bending of a portion close to the front edge of the cardboard plate or the like in A forward direction.
     10
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    同族专利:
    公开号 | 公开日
    ES2685459B2|2019-02-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0464281A2|1990-07-05|1992-01-08|Louis Mark Sardella|Conveyor system for feeding blanks, sheets or the like|
    DE102004058599A1|2003-11-26|2005-08-11|Ebe Hesterman|Finishing process conducting device for e.g. paper, has processing rollers, where one roller built as transport roller has openings to suck and blow air and gripper for registered transport of substrate|
    US20150084275A1|2013-09-26|2015-03-26|Kabushiki Kaisha Isowa|Sheet feeder of corrugated cardboard sheet box making machine|
    法律状态:
    2018-10-09| BA2A| Patent application published|Ref document number: 2685459 Country of ref document: ES Kind code of ref document: A1 Effective date: 20181009 |
    2019-02-14| FG2A| Definitive protection|Ref document number: 2685459 Country of ref document: ES Kind code of ref document: B2 Effective date: 20190214 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201830098A|ES2685459B2|2018-02-05|2018-02-05|Module of crushing of cardboard plates for a digital printing machine, digital printing machine and digital printing process|ES201830098A| ES2685459B2|2018-02-05|2018-02-05|Module of crushing of cardboard plates for a digital printing machine, digital printing machine and digital printing process|
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