EP0150047A2 - Machine d'impression flexographique avec bâti de machine stabilisé thermiquement - Google Patents

Machine d'impression flexographique avec bâti de machine stabilisé thermiquement Download PDF

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Publication number
EP0150047A2
EP0150047A2 EP85100445A EP85100445A EP0150047A2 EP 0150047 A2 EP0150047 A2 EP 0150047A2 EP 85100445 A EP85100445 A EP 85100445A EP 85100445 A EP85100445 A EP 85100445A EP 0150047 A2 EP0150047 A2 EP 0150047A2
Authority
EP
European Patent Office
Prior art keywords
flexographic printing
printing machine
temperature
temperature control
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.)
Granted
Application number
EP85100445A
Other languages
German (de)
English (en)
Other versions
EP0150047B1 (fr
EP0150047A3 (en
Inventor
Christoph Dr. Ing. Hars
Ottomar Ing. Grad. Tessmann
Klaus Ing. Grad. Schirrich
Bodo Ing. Grad. Steinmeier
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.)
Fischer and Krecke GmbH and Co KG
Original Assignee
Fischer and Krecke GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fischer and Krecke GmbH and Co KG filed Critical Fischer and Krecke GmbH and Co KG
Publication of EP0150047A2 publication Critical patent/EP0150047A2/fr
Publication of EP0150047A3 publication Critical patent/EP0150047A3/de
Application granted granted Critical
Publication of EP0150047B1 publication Critical patent/EP0150047B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/0024—Frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2200/00—Printing processes
    • B41P2200/10—Relief printing
    • B41P2200/12—Flexographic printing

Definitions

  • the invention relates to a flexographic printing machine with the features mentioned in the preamble of claim 1.
  • Single cylinder flexo printing machines have a large common.
  • Counter-pressure cylinders around which 4 or 6 flexographic printing units are arranged in the two most widespread embodiments today.
  • the impression cylinder has a diameter of 1 to 2 m and in special cases also more than 2 m.
  • the impression cylinders must be made with very high concentricity, which must also be guaranteed during the operating time.
  • the so-called multi-cylinder flexographic printing presses in which a separate impression cylinder is assigned to each individual printing unit, the diameter of which depends primarily on the working width between 100 and 300 mm
  • a larger run-out deviation can be tolerated for the impression cylinder, because due to the stronger curvature of the impression cylinder, the contact surface between the plate and impression cylinder is narrower, so that the infeed force of plate against counter-pressure cylinder for a given thickness tolerance of the plate and the substrate is less and the compensation capacity of the plate is cheaper.
  • intermediate drying is arranged between the individual flexographic printing units in a flexographic printing press, which are of great importance especially when printing on non-absorbent substrates and have the task of at least drying the ink applied in preceding printing units, before further color is applied in the next printing unit, either over a large area or in halftone dots
  • the intermediate dryers generally work according to the principle of so-called convection drying: in which a forced air flow is blown onto the freshly printed material web and at the same time is sucked off again by means of the so-called intermediate drying blower suction box.
  • the blown air is usually tempered, the temperatures primarily depending on the substrate, e.g. between 40 and 60 ° for many plastic films when printing paper, but also up to 100 ° C and more.
  • Steel impression cylinders with an outer steel double wall are known, with a natural tempering water channel with the space between them. Through this tempering water channel, tempering water is conducted almost without pressure and with the aid of water guiding elements, which is kept at a predetermined temperature level by means of an externally connected temperature control device.
  • Single-walled, primarily cast iron impression cylinders are also known, in which the tempering water is sprayed from the inside against the cast iron cylinder jacket.
  • the flexographic printing which has been greatly developed in recent years and is now practiced with high print quality, shows the following problematic processes from time to time when working with single-cylinder flexographic printing presses: shortly after start-up, primarily a single-cylinder flexographic printing press, e.g. after 5 to 10 minutes of operation, there are initially barely noticeable slight, but then more clear, dropouts in the print, which make it necessary to readjust the printing units immediately.
  • this error can only be corrected after it has occurred visually.
  • rejects are contained within a printed roll of material, which under certain circumstances, however, make the entire reel of rejects because it is no longer possible afterwards to further process a printed roll, which may even be defective in small numbers select printed products.
  • This phenomenon is attributed, if it occurs, to insufficient infeed of the printing units, the infeed elements of which have settled or shifted slightly due to the vibrations and impact forces occurring during printing. The error is then corrected by slightly adjusting the printing units.
  • the object of the invention described below is therefore to find a solution for the problems arising from the phenomena described for flexographic printing machines, in particular single-cylinder flexographic printing machines, and the cause of the pressure loss phenomena that arise from time to time shortly after the start of operation avoid.
  • the invention is based on the knowledge that temperature-related material expansions in the two side frames of the printing press are responsible as the cause for the gradual loss of pressure. While the counter-pressure cylinder of the single-cylinder flexo printing presses, as described in detail above, is kept at a constant temperature level with the help of a separate temperature control system in order to compensate for the influence of the warm air of the intermediate drying, which is distributed unevenly over the circumference of the counter-pressure cylinder, and to ensure high concentricity , the requirement, in particular for the quality flexographic printing, of constant temperature control of the printing press frame carrying the printing units has not yet been recognized.
  • the stretching condition of the press frame can change in relation to pressure. If the printing press frame heats up while the temperature of the impression cylinder remains constant, the frame expands slightly and the printing units move away from the impression cylinder, which can lead to the described misfires if the printing units are set accordingly. When the printing machine frame cools down, the printing units move towards the impression cylinder, which, however, has little or no effect on the printing result in extreme situations due to the comparatively low infeed.
  • the solution according to the invention is now to temper the printing machine frames in a similar way to the impression cylinder, for which purpose the printing machine frames are equipped, for example, with internally guided water channels, passed through the temperature control water and thus the printing machine frame being kept at a constant temperature.
  • tempering coils that is to say a pipeline carrying a tempering fluid, with good heat conduction onto the printing press frame, with particular emphasis being placed on high Heat transfer coefficient between the temperature coil system and the printing machine frames is to be placed.
  • such a temperature stabilization of the printing press frames is required at least in the projection area of the impression cylinder, since one can assume with sufficient accuracy that the side parts of the printing units including the consoles on the one hand and the main print stand in the projection area of the impression cylinder on the other hand heat up. Outside the periphery of the impression cylinder, the thermal expansions - provided the heating is the same - will cancel each other out. Within the periphery of the impression cylinder, on the other hand, due to the fixation of the temperature of the impression cylinder on the one hand and the previously not practiced temperature stabilization of the printing press frame, on the other hand, a relative difference in elongation occurs.
  • Heat radiation in the printing machine frames can e.g. be given in the breakthroughs for the air guide tubes of the intermediate drying.
  • the local introduction of heat is effectively avoided by a tempering channel around the opening.
  • a ring channel can also be formed by a tempering coil with a good heat transfer coefficient around the opening for the intermediate drying air guide tubes.
  • the impression cylinder 1 of a single-cylinder flexographic printing stand with six printing units is shown in its outline.
  • the print stand consists in detail of the generally multi-part main frame 2, which is placed on the foundation plate 3 and in addition to the storage for the impression cylinder 1 usually receives multi-part frames 4, the latter in the case shown here for four printing units seamlessly into the Skip printing unit consoles 5.
  • the printing units consist in detail of the printing unit block 6, the inking unit block 7 and are used to hold a plate printing cylinder 8 and, for example, a pair of inking rollers 9.
  • the impression cylinder 1 is, as described but not shown in the drawing, equipped with a temperature control system, so that the impression cylinder 1 is large Accuracy is kept at a constant temperature level.
  • the main pressure stand also applies, consisting of the side parts 2 and 4, in the projection area of the impression cylinder 1 also to keep at a constant temperature level.
  • the pressure stand 2, 4 is equipped with a continuous temperature control channel in the projection area of the counter pressure cylinder, so that only one temperature water inlet and outlet 11, 12 is necessary in each case. This has the advantage over a multi-part temperature control system to be acted on in parallel that an equal amount of flooding with the temperature control medium is ensured in all areas.
  • Figure 2 shows the side view of a single-cylinder flexographic printing stand with six printing units analogous to Figure 1, but with four separate temperature control channels 13, 14, 15 and 16 with the inlet and outlet connections l3a, b, l4a, b, l5a, b and 16a, b .
  • a duct arrangement according to FIG. 2 offers the advantage over the duct arrangement according to FIG. 1 that the flow through the four tempering areas, depending on the application of the connections 13a, b, l4a, b, l5a, b and l6a, b, is both a series connection according to FIG. 1, but also parallel connection is possible.
  • FIG. 3 shows a pressure stand according to FIGS. 1 and 2, in which, however, in contrast to the previous figures, only the temperature control channels 16 and 17 are shown are provided, which serve to shield the heat radiation that emanates from the supply and exhaust air pipes for the intermediate drying.
  • the blow-suction nozzles of the intermediate drying are designated 18 and the supply and exhaust air pipes through the printing unit frame for the intermediate drying are designated 19 and 20 respectively.
  • a temperature-stabilized printing press frame will preferably have both the temperature control channel system according to FIG. 1 or 2 and the temperature control channels according to FIG. 3.
  • the impression cylinder 1 is supported on both sides. For this reason, a printing press has side parts 2, 4 on both sides of the impression cylinder.
  • the air guide tubes 19, 20 for the intermediate drying 18 are generally only supplied from one side, so that the temperature control channels 16 and 17 according to FIG. 3 are only on the machine side which the air guide pipes are located, need to be acted upon with the temperature control medium.
  • the temperature control channels 16, 17 according to FIG. 3 cannot be accommodated in every machine type for reasons of space. It is advantageous from the inside against the opening, preferably a cast aluminum Temperierschlange 21 against the respective bracket 5 or for the T emperierschlange 17 from within against the frame 2 to be screwed.
  • the Temperierschlange 21 (see FIG. F ig. 4) has a cast temperature control channel 24 with the inlet and Ab technologicalbohrung 22 and 23 via the screw holes 25 on the bottom 26, this finely machined Temperierschlange 21 to be screwed on the screw holes 25.
  • Figure 5 shows a perspective view of a simplified section of a larger temperature coil, which essentially consists of the conduit 27 for the temperature control medium and a screw-on plate 28, which is welded to the tube 27 with the weld 29.
  • Large-area, meandering temperature-control coils according to FIG. 5 can be screwed onto the smooth, non-ribbed side of the pressure stand 2, 4 as an alternative to the cast-in temperature-control channels according to FIGS. 1 and 2 against the printing machine frame or frames, with a very good heat transfer from screw-on plate 28 to frame 2 or 4 is important.
  • a pressure stand with a screwed-on temperature control system is preferably provided with an additional cover - especially to the ribbed side - with the help of a cover plate to prevent unhindered heat entry to protect from the outside.
  • FIG. 6 An analog cover plate according to FIG. 6 serves to prevent the unhindered heat radiation from the supply and exhaust air pipes for the intermediate drying onto the printing unit consoles, and thus to facilitate the temperature control by means of the temperature control coil attached from the inside.
  • Figure 6 gives a schematic representation. It shows the section through the console 5, the temperature control coil 21 with the cast-in channel 24 for guiding the temperature control medium, the air supply and discharge pipes 19 and 20, and the cut shield 30, which is screwed to the temperature control coil 21 or the console 5 in poor heat conduction , in which the retaining tabs 31 preferably
  • the shield 30 is used at a short distance from the tempering coil 24 and console 25.
  • FIG. 1 also shows temperature measuring points 32 at which the current temperature of a printing press frame can be continuously measured and monitored, which can be used for a display, but which is also used in software, in particular in the case of numerically controlled printing units, by automatic readjustment of the printing units can.
  • FIG. 7 shows in a horizontal section a top view with the cut printing press frame 2, the impression cylinder 1, an outer cover plate 37 and an inner two-part shielding plate 33.
  • the temperature control air flows through the space 35, which is ripped from the side part 2, in a vertical direction.
  • the cover plate 37 is screwed onto the side part 2 via felt seals 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP85100445A 1984-01-18 1985-01-17 Machine d'impression flexographique avec bâti de machine stabilisé thermiquement Expired - Lifetime EP0150047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3401626 1984-01-18
DE19843401626 DE3401626A1 (de) 1984-01-18 1984-01-18 Flexodruckmaschine mit temperaturstabilisiertem druckmaschinengestell

Publications (3)

Publication Number Publication Date
EP0150047A2 true EP0150047A2 (fr) 1985-07-31
EP0150047A3 EP0150047A3 (en) 1987-08-26
EP0150047B1 EP0150047B1 (fr) 1990-08-01

Family

ID=6225275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100445A Expired - Lifetime EP0150047B1 (fr) 1984-01-18 1985-01-17 Machine d'impression flexographique avec bâti de machine stabilisé thermiquement

Country Status (5)

Country Link
US (1) US5048418A (fr)
EP (1) EP0150047B1 (fr)
JP (1) JPS61160250A (fr)
DE (2) DE3401626A1 (fr)
ES (1) ES8606130A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225995A3 (fr) * 1985-12-20 1989-03-15 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Machine d'impression rotative avec cylindres de groupe imprimants et rouleaux distributeurs montés entre des parois latérales
EP0574103A1 (fr) * 1992-06-04 1993-12-15 Komori Corporation Presse à imprimer
EP1493566A1 (fr) * 2003-07-03 2005-01-05 Fischer & Krecke Gmbh & Co. Machine à imprimer
EP1500500A1 (fr) * 2003-07-03 2005-01-26 Fischer & Krecke Gmbh & Co. Machine à imprimer
WO2011154566A1 (fr) * 2010-06-01 2011-12-15 Comexi Group Industries, S.A.U. Machine à imprimer

Families Citing this family (15)

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Publication number Priority date Publication date Assignee Title
DE4308712B4 (de) * 1993-03-18 2005-10-13 Windmöller & Hölscher Kg Druckmaschine
US5370047A (en) * 1993-12-01 1994-12-06 Paper Converting Machine Company Flexographic press adapted for short runs and method
US5471927A (en) * 1994-05-26 1995-12-05 Royse Manufacturing Company, Inc. Temperature controlled printing press
DE4438246C1 (de) * 1994-10-26 1995-12-07 Metronic Geraetebau Druckeinrichtung zum Bedrucken von Compact-Discs (CD)
US5842417A (en) * 1995-04-25 1998-12-01 Heidelberger Druckmaschinen Ag Apparatus for preventing condensation in machines processing a web of material
DE19544477C2 (de) * 1995-11-29 2001-03-29 Heidelberger Druckmasch Ag Seitenwand eines Druckwerks in einer Bogenrotationsdruckmaschine
US5950099A (en) * 1996-04-09 1999-09-07 Kabushiki Kaisha Toshiba Method of forming an interconnect
US7114447B2 (en) * 2002-03-20 2006-10-03 Comexi, S.A. Flexographic printer with enclosures at a regulated temperature and vapor extraction
US6910353B2 (en) 2002-11-27 2005-06-28 Milliken & Company Printed loop fabric and method for producing the same
US7325421B2 (en) * 2002-11-27 2008-02-05 Sasser Michael P Printed loop fabric and method for producing the same
ITMI20061216A1 (it) * 2006-06-23 2007-12-24 Omet Srl Macchina da stampa flessografica con dispositivo di asciugatura essicazione polimerizzazione e-o riscaldamento del nastro inchiostrato
US20090069926A1 (en) * 2007-09-11 2009-03-12 Awea Mechantronic Co., Ltd. CNC apparatus with mechanism for controlling length variation of lead screw due to thermal expansion and method therefor
DE102008035277A1 (de) * 2008-07-29 2010-02-04 Fischer & Krecke Gmbh Verfahren zum Einstellen von Walzenpositionen in einer Rotationsdruckmaschine
US8611780B2 (en) 2011-06-30 2013-12-17 Hewlett-Packard Development Company, L.P. Regulating temperature of a roller device
JP6998616B2 (ja) * 2020-04-07 2022-01-18 三郷コンピュータホールディングス株式会社 印刷装置

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US1724644A (en) * 1924-05-05 1929-08-13 Benjamin B Salvaty Means and method of treating sheet material
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DE1217973B (de) * 1964-12-03 1966-06-02 Ruesch Ferd Maschf Verwindungsfrei heizbarer Zylinder zur Verwendung als Gegendruck- und Trocken-zylinder bei Druckmaschinen
US3704669A (en) * 1970-07-15 1972-12-05 Stevens Corp Vibrating roller with means for circulating a cooling fluid for use in bearing and drive gear lubrication
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DE3208886A1 (de) * 1982-03-11 1983-09-22 Inoue-Japax Research Inc., Yokohama, Kanagawa Verfahren und vorrichtung zum halten eines thermisch verbiegbaren bauteils gegen fehlpositionierung in einer arbeitenden werkzeugmaschine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225995A3 (fr) * 1985-12-20 1989-03-15 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Machine d'impression rotative avec cylindres de groupe imprimants et rouleaux distributeurs montés entre des parois latérales
EP0574103A1 (fr) * 1992-06-04 1993-12-15 Komori Corporation Presse à imprimer
US5592882A (en) * 1992-06-04 1997-01-14 Komori Corporation Printing press bearing and method of controlling temperature of bearings of a printing press
EP1493566A1 (fr) * 2003-07-03 2005-01-05 Fischer & Krecke Gmbh & Co. Machine à imprimer
EP1500500A1 (fr) * 2003-07-03 2005-01-26 Fischer & Krecke Gmbh & Co. Machine à imprimer
US7111552B2 (en) 2003-07-03 2006-09-26 Fisher & Krecke Gmbh & Co. Printing machine
US7114438B2 (en) 2003-07-03 2006-10-03 Fischer & Krecke Gmbh & Co. Printing machine including central impression cylinder
WO2011154566A1 (fr) * 2010-06-01 2011-12-15 Comexi Group Industries, S.A.U. Machine à imprimer
ES2374784A1 (es) * 2010-06-01 2012-02-22 Comexi Group Industries, Sau Máquina impresora.

Also Published As

Publication number Publication date
ES539652A0 (es) 1986-04-01
JPH0369307B2 (fr) 1991-10-31
EP0150047B1 (fr) 1990-08-01
EP0150047A3 (en) 1987-08-26
US5048418A (en) 1991-09-17
DE3578920D1 (de) 1990-09-06
JPS61160250A (ja) 1986-07-19
ES8606130A1 (es) 1986-04-01
DE3401626A1 (de) 1985-07-18

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