Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F31/00—Inking arrangements or devices
  • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
  • B41F31/302—Devices for tripping inking devices as a whole
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F9/00—Rotary intaglio printing presses
  • B41F9/06—Details
  • B41F9/08—Wiping mechanisms
  • B41F9/10—Doctors, scrapers, or like devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F9/00—Rotary intaglio printing presses
  • B41F9/06—Details
  • B41F9/18—Auxiliary devices for exchanging forme cylinders

Definitions

• the present invention relates to a method of mounting a printing unit for a printing machine.
• the invention also relates to a method of disassembling a printing unit for a printing machine.
• the invention also relates to a method of converting a printing unit for a printing machine.
• the invention relates to a transport device that can be used in a method for mounting, dismantling and / or transforming a printing unit, intended for a printing machine.
• the present invention also relates to a device for use in entering a printing unit for a printing machine.
• the printing group is more specifically used in a gravure printing machine.
• Photogravure also called rotogravure
• rotogravure is a rotary printing process that can be used for many substrates, including paper or cardboard, using engraved cylinders. Gravure printing is used especially for high-quality editions and large prints where graphics must play an important role in promoting a product, such as a carton pack. In one pass, this printing process can print up to twelve or more colors with solvent inks.
• a medium to be printed in the form of a continuous strip passes through a succession of gravure printing units.
• the printing units are assembled and arranged longitudinally one after the other from the input of the print medium upstream to its output downstream.
• Each printing group proceeds to print a pattern with a single specific color or a particular varnish, or else performs an embossing.
• More and more users want to have a printing machine with great flexibility. So, first of all, they want to make extremely fast changes of work by modifying engraved print cylinders, in order to cope with the demands of more and more punctual printing in small series of their customers.
• US-3,625,145 discloses a removable printing carriage for use in gravure printing, to facilitate handling and permutation of the engraved rolls.
• the carriage comprises a frame, means cooperating with the support means of the printing unit, an engraved impression cylinder rotating relative to the carriage.
• This carriage fits into a volume located inside a printing unit, which integrates support means to receive it.
• the impression cylinder is locked to a drive mechanism.
• Document FR-2.563.469 discloses a gravure printing unit provided with two squeegee systems arranged longitudinally and on two opposite sides, with respect to the cylinder, so as to allow, if necessary, a front printing or a back printing.
• a carriage is used to facilitate the introduction and extraction of the cylinder in the printing unit, in a longitudinal direction relative to the printing unit.
• One of the squeegee systems is connected to a structural part of the printing unit.
• the structural member slides vertically along slideways between a lower position, in which the doctor blade is in the use position, and an upper position in which the same doctor system is at a higher elevation than above the cylinder.
• EP-0.682.601 discloses a carriage which is intended to be used in different types of printing machines.
• This carriage carries one or more removable parts, which allows them to be inserted and removed from the printer unit of the printing machine.
• a doctor blade system here in the form of a doctor blade chamber, is part of the removable parts.
• the carriage is positioned longitudinally with respect to the printer unit.
• the carriage comprises a movable frame bringing or removing the removable part or parts. Transfer means and means for fixing the removable part or parts inside the printing unit are also provided.
• a main problem that the present invention proposes to solve is to implement a method of assembly, disassembly and / or transformation of a printing unit.
• a second problem is to realize a method of mounting a printing unit, using a transport device.
• a third problem is to obtain a method of disassembly and transformation of a printing unit, with the aim of changing its destination, with a transport device.
• a fourth problem is to develop a transport device to be used by being inserted inside a frame in a printing unit.
• Still another problem is that of positioning a squeegee system on a transport device and transferring it from that same device to the printing unit.
• An object of the invention is to solve the technical problems mentioned for the documents of the state of the art.
• the present invention is directed to a method of mounting a printing unit belonging to a printing machine, the printer group comprising a frame, a printer carriage, adapted to be fitted inside and to be secured to the frame, and a squeegee system, independent of the printer carriage and adapted to be secured to this frame.
• the transport device is defined as a movable assembly capable of supporting the weight of the doctor blade system, with or without wheels, transport cart type or the like.
• the transport device is suitably dimensioned, for its entry inside and its exit outside the frame of the printing unit, being operable by an operator.
• the present invention aims at a method of disassembly and / or transformation of a printing unit belonging to a printing machine, the printing unit comprising a frame, a printer carriage, entered inside and joined together. to the frame, and a squeegee system, independent of the printer carriage and secured to this frame.
• the disassembly and / or transformation method is characterized in that it comprises the steps of:
• the invention also relates to a transport device, able to transport a squeegee system, to enter inside and to exit outside a frame of a printing unit belonging to a printing machine, comprising a frame and a carrier element, characterized in that it has a capacity to enter and exit transversely relative to the frame, and in that the carrier element has a capacity to be movable in a substantially longitudinal direction, to take two positions extremes in upstream and downstream directions, so as to allow a connection or a separation, and a transport of the doctor blade system.
• the longitudinal direction is defined as the horizontal direction of progression of the medium to be printed throughout the printing machine.
• the upstream direction is defined as the horizontal direction from which the blank print media enters the printer group or the printing machine.
• the downstream direction is defined as the horizontal direction towards which the graphically printed medium exits the printing unit or the printing machine.
• the transverse direction is defined as the horizontal direction perpendicular to the direction of progression of the medium to be printed.
• the device not only allows the entry, exit and transport of the doctor blade system, but also an inverted positioning of the doctor blade system in the printing unit.
• the downstream position allows front-side printing and the upstream position allows for back side printing.
• FIG. 3 shows a perspective view of a transport device with a squeegee system
• FIG. 4 shows a partial side view of the transport device with the squeegee system
• FIG. 5 and 6 show respectively partial perspective views showing the two extreme positions taken by a carrier member of the transport device;
• - Figure 7 shows a partial perspective view of the rear centering means of the transport device relative to the printing unit;
• FIG. 8 shows a partial perspective view of the front centering means of the transport device relative to the printing unit
• FIG. 9 shows a partial perspective view of the locking means of the transport device to the printing unit.
• FIG. 10 shows a partial perspective view of the locking means of the doctor blade system to the transport device.
• a printing machine is composed of several printing units (1, 2, 3 and 4) which are successively mounted one after the other in order to constitute a printing machine.
• a print medium (6) goes upstream (Arrow I in Figure 1) in each of the printer groups (1, 2, 3 and 4), for example to be printed with a color, spring downstream (Arrow O).
• Each printing unit (1, 2, 3 and 4) comprises a printer carriage (7), itself having an engraved cylinder (8), an ink supply which brings the ink onto the engraved cylinder (8), a ink tray, which recovers the overflow of ink.
• Each printing unit (1, 2, 3 and 4) also has a frame (9), a dryer (11), which ensures the rapid evaporation of solvents or water, or the polymerization of UV inks, a pressure roller (12), which strongly presses the print medium (6) on the cylinder (8), and a pump that supplies the reservoir ink to the ink applicator (not shown in FIG. 1).
• the printing carriage (7) is inserted or inserted into an empty volume (13) formed in the center of the frame (9), being retracted transversely, that is to say perpendicularly to the direction of progression of the support (6).
• a squeegee system (14) removes excess ink on the cylinder (8) by means of a scraper blade, smoothing the peripheral surface of the cylinder (8) and leaving only ink that has penetrated into the cells .
• the squeegee system (14) is fixed to the frame (9).
• the squeegee system (14) protrudes into the volume (13) of the frame (9).
• the first printing unit (1) performs a single-sided printing and the second printing unit (2) performs a back printing of the print medium (6), which requires an inverted positioning of the squeegee system (14), downstream side or upstream side , relative to the direction of advance (I and O) of the medium to be printed (6), and a tracking mechanism different from the medium to be printed (6) inside the frame (9).
• a method of mounting a Printer group includes several steps.
• a first step is to place the squeegee system (14) on a transport device or empty transport trolley (16), outside the frame (9).
• a second step is to enter or insert the transport carriage (16) with the squeegee system (14) in the frame (9) of the printing unit (1 and 2).
• the step of inserting the transport carriage (16), can be done transversely relative to the frame (9).
• the method may comprise an additional step, arranged after the step of inserting the transport carriage (16) with the doctor system (14). This step added may favorably center and lock this transport carriage (16) relative to the frame (9) of the printing unit (1 and 2).
• the mounting method may comprise an additional step arranged after the step of placing the doctor blade (14) on the empty transport carriage (16) before the step of inserting the transport carriage (16).
• this added step may consist in locking the doctor blade system (14) to this empty transport trolley (16).
• a third step is to secure the doctor blade system (14) to the frame (9).
• the joining of the squeegee system (14) is downstream side to obtain a front printing unit (1).
• the joining of the squeegee system (14) is upstream side, to obtain a reverse printing unit (2).
• a fourth step is to remove the empty transport carriage (16) out of the frame (9), outside the printing unit (1 or 2).
• a fifth step is to insert the printer carriage (7) in the frame (9).
• the method may comprise an additional step disposed after the step of inserting the printer carriage (7).
• This added step may favorably center and lock this printer carriage (7) relative to the frame (9) of the printing unit (1 and 2).
• the step of inserting the printer carriage (7) can be done transversely relative to the frame (9).
• a sixth step is to secure the printer carriage (7) to the frame (9).
• a disassembly method ( Arrows D in Figure 1) and transformation of a printer group (1 and 2) comprises several steps.
• a first step is to separate the printer carriage (7) from the frame (9).
• a second step is to leave the printer carriage (7) out of the frame (9), outside the printing unit (1 and 2).
• the step of removing this printer carriage (7) can be transversely to the frame (9).
• a third step is to insert an empty transport cart (16) into the frame (9).
• a fourth step is to separate the squeegee system (14) from the frame (9).
• a fifth step is to put the squeegee system (14) on the empty transport trolley (16).
• a sixth step is to remove the transport carriage (16) with the squeegee system (14) out of the frame (9) outside the printing unit (1 and 2).
• the step of removing the transport carriage (16) can be transverse to the frame (9).
• the disassembly process may comprise an additional step, arranged after the step of placing the doctor blade (14) on the empty transport carriage (16), before the step of removing the transport carriage (16) with this squeegee system (14).
• this added step may consist in locking the doctor blade system (14) to this empty transport trolley (16).
• the method of converting the printing unit (1) may comprise two additional steps, arranged after the step of removing the transport carriage (16) with the doctor system (14). In a first embodiment of this method, these added steps may include inserting the transport carriage (16) with a squeegee system (14) in the inverted position in the frame (9), and then to secure the system. doctor blade (14) in an inverted position at this frame (9) of the printing unit (2).
• the front printing unit (1) is transformed into a back printer group (2).
• the method may comprise an additional step, arranged after the step of inserting the transport carriage (16) with a squeegee system (14) in an inverted position. This added step may favorably center and lock this transport carriage (16) relative to the frame (9) of the printing unit (1 or 2).
• the process of converting the printing unit (1 and 2) may comprise two additional steps, arranged after the step of removing the transport carriage (16) with the doctor blade system. (14). These added steps may consist of inserting (Arrow F in Figure 1) a flexographic printing carriage (17) in the frame (9) and then to secure the flexographic printing carriage (17) to the frame (9) of the group printer (3).
• the step of inserting a flexographic printing carriage (17) can be done transversely with respect to the frame (9).
• the method may include an additional step arranged after the step of inserting a flexographic printing carriage (17). This added step may favorably center and lock this flexo printing carriage (17), relative to this frame (9) of the printing unit (3).
• the method of converting the printing unit (1 and 2) may comprise two additional steps, arranged after the step of taking out the transport carriage (16) with the squeegee system (14). . These added steps may consist in inserting (Arrow E in FIG. 1) an embossing carriage (18) into the frame (9) and then securing the embossing carriage (18) to this frame (9) of the printing unit (4). .
• the step of inserting an embossing carriage (18) can be transverse to the frame (9).
• the method may comprise an additional step arranged after the step of inserting a carriage of embossing (18) in the frame (9). This added step may favorably center and lock the embossing carriage (18) relative to the frame (9) of the printing unit (4).
• the transport device or trolley (16) comprises a frame, similar to a table, in the form of a lower transverse base (19), a vertical upright (21), and a carrier element (22). ).
• the carrier element (22) is mounted on two transverse upper beams (23), starting from the vertical upright (21) and cantilevered relative to the base (19).
• the transport trolley (16) is easily moved by an operator with the aid of a small trolley with low wheels, devil type.
• the transport carriage (16) is dimensioned to penetrate and spring transversely out of the empty volume (13) of the frame (9) of the printing unit (1, 2, 3 and 4).
• the squeegee system (14) is placed on the carrier (22), so as to allow its transport.
• the carrier element (22) is movable in a substantially longitudinal direction, to take two extreme positions in upstream and downstream directions with respect to the direction of progression of the printing medium (6), so as to allow a joining or disconnection of the doctor blade system (14).
• the squeegee system (14) is secured to the printing unit (1) for the latter to perform a simplex printing.
• the doctor blade system (14) is secured to the printing unit (2), so that the latter makes a back printing.
• the carrier member (22) comprises two longitudinal bars (24) connected by a transverse spacer (26).
• the squeegee system (14) rests on the two longitudinal bars (24).
• the two longitudinal bars (24) are slidably movable in two longitudinal rails (27), attached to the two upper beams (23). The sliding is done in the upstream direction (arrows SU in Figure 5) and in the downstream direction (arrows SD in Figure 6). Sliding is achieved by meshing two longitudinal racks
• the two gears (29) are interconnected by a rod (31) and driven by a steering wheel (32) and a handle (33).
• the rod (31) and the pinions (29) rotate, which causes the movement of the rack (29) and the two longitudinal bars (24).
• the operator thus comes either to look for the squeegee system (14), for the disassembly and transformation of the printing unit (1 and 2), or to place the squeegee system (14), in front or back position, for mounting of the printing group (1 and 2).
• the transport trolley (16) may comprise centering means capable of cooperating with corresponding, conjugate, centering means present in the frame of the printing unit.
• centering means comprise (see FIG. 7) rear centering means (34) situated at the distal transverse end of the transport carriage (16), that is to say opposite the flywheel (32). and being inaccessible to the operator when the transport carriage (16) is inserted into the printing unit (1 and 2).
• the rear centering means (34) are in the form of a cam follower (36) engaging a corresponding rear groove (37) forming part of the frame (9) of the printing unit (1 and 2). ).
• These centering means comprise (see FIG.
• forward centering means (38) situated at the proximal transverse end of the transport carriage (16), that is to say flying side (32) and being accessible to the operator. when the transport carriage (16) is inserted into the printing unit (1 and 2).
• the front centering means (38) is in the form of an axis (39) engaging in a corresponding front groove (41) forming part of the frame (9) of the printing unit (1 and 2).
• the rear groove (37) and the front groove (41) of the frame (9) can also be used for the adjustment of the "skewing", which is a technique of adjustment by offsetting the engraved cylinder of the printing carriage (7). ).
• the transport trolley (16) may comprise locking means (42) capable of cooperating with locking means, conjugate, corresponding, and present in the frame (9) of the printing unit (1 and 2).
• These locking means (42) comprise a bolt (43) located at the proximal transverse end of the transport carriage (16). The bolt (43) is inserted and locks against a block (44) of the frame (9). It should be noted that the block (44) of the frame (9) can also be used for locking the printing carriage (7).
• the transport carriage (16) may comprise locking means (46), adapted to cooperate with locking means, conjugate, corresponding and present at the squeegee system (14).
• These means locking members (46) are part of the two longitudinal bars (24).
• the locking means comprise two studs provided with an abutment (47), each provided on the two longitudinal bars (24), and against which the respective slice of the longitudinal plates (48) of the scraper system (14) comes to rest .
• These locking means (47) also comprise two pins (49), respectively inserting both into a hole in the stud (47) and in the longitudinal plates (48) of the doctor system (14).

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Rotary Presses (AREA)
• Screen Printers (AREA)
• Printing Methods (AREA)
• Inking, Control Or Cleaning Of Printing Machines (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (2)

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• 2008
  • 2008-04-08 ES ES08735087T patent/ES2373186T3/es active Active
  • 2008-04-08 US US12/598,242 patent/US8418613B2/en not_active Expired - Fee Related
  • 2008-04-08 CN CN2008800143563A patent/CN101674936B/zh not_active Expired - Fee Related
  • 2008-04-08 WO PCT/EP2008/002768 patent/WO2008141699A1/fr not_active Ceased
  • 2008-04-08 AT AT08735087T patent/ATE528136T1/de not_active IP Right Cessation
  • 2008-04-08 JP JP2010504489A patent/JP5023385B2/ja not_active Expired - Fee Related
  • 2008-04-08 EP EP08735087A patent/EP2139684B1/de active Active

Non-Patent Citations (1)

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