EP0150047B1 - Flexodruckmaschine mit temperaturstabilisiertem Druckmaschinengestell - Google Patents

Flexodruckmaschine mit temperaturstabilisiertem Druckmaschinengestell Download PDF

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Publication number
EP0150047B1
EP0150047B1 EP85100445A EP85100445A EP0150047B1 EP 0150047 B1 EP0150047 B1 EP 0150047B1 EP 85100445 A EP85100445 A EP 85100445A EP 85100445 A EP85100445 A EP 85100445A EP 0150047 B1 EP0150047 B1 EP 0150047B1
Authority
EP
European Patent Office
Prior art keywords
printing
temperature
flexographic printing
impression cylinder
machine
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.)
Expired - Lifetime
Application number
EP85100445A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0150047A3 (en
EP0150047A2 (de
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/de
Publication of EP0150047A3 publication Critical patent/EP0150047A3/de
Application granted granted Critical
Publication of EP0150047B1 publication Critical patent/EP0150047B1/de
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 flexographic printing presses have a large common impression cylinder, around which 4 or 6 flexographic printing units are arranged in the two most common embodiments today.
  • the impression cylinder has a diameter of 1 to 2 m and in special cases also more than 2 m.
  • the so-called multi-cylinder flexographic printing press in which a separate impression cylinder is assigned to each individual printing unit, the diameter of which, depending on the working width, can be set between 100 and 300 mm, may tolerate a larger runout for the impression cylinder become, because due to the stronger curvature of the impression cylinder the contact surface between the plate and impression cylinder narrower, consequently the infeed force between the plate and impression cylinder with given thickness tolerances of the plate and substrate is lower and thus the balancing capacity of the plates is overall more favorable.
  • intermediate drying is arranged in a flexographic printing press between the individual flexographic printing units, 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 over a large area or in halftone dots.
  • the intermediate dryers generally work on the principle of so-called convection dryers, 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 depending on the substrate between 40 and 60 ° for many plastic films, but also up to 100 ° C and more when printing on paper.
  • 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 printing 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 require an immediate readjustment of the printing units.
  • this error can only be corrected after it has occurred visually.
  • rejects are contained within a printed roll of material, which may, however, make the entire reel of rejects, because afterwards it is no longer possible, after further processing of a printed roll, to select the possibly incorrectly printed products that are only present in small numbers.
  • 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 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.
  • the stretching state of the printing press frame can change relevant 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. Conversely, when the printing machine frame cools, the printing units experience an offset in the direction of the impression cylinder, which, however, has a comparatively smaller effect and only has a noticeable effect on the printed product given the high quality requirements that are common today.
  • 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, through which tempering water is passed and thus the printing machine frame is kept at a constant temperature.
  • 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 fixed 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, there is a relative difference in elongation and thus a relative offset of the printing units to the surface of the impression cylinder.
  • Heat radiation in the printing machine frames can e.g. B. be given in the bridges for the air guide tubes of the intermediate drying.
  • the Local heat input is effectively avoided by a tempering channel around the opening.
  • Such a ring channel can also be formed by a tempering coil with a good heat transfer number around the opening for the intermediate drying air guide tubes.
  • Another possible solution for controlled temperature control or temperature stabilization is to provide the printing press frames with air guiding and temperature control ribs on at least one side, so that the printing press frames are tempered by a temperature-controlled air flow.
  • a better, but technically more complex solution is obtained by means of a double-wall frame, which is given sufficient stability by vertical partition walls or ribs, while at the same time guaranteeing constant temperature control of the press frame within the desired ranges via optimal guidance of an internal air temperature control system.
  • the main pressure stand consisting of the main frame 2 and the frames 4, must also be kept at a constant temperature level in the projection area of the impression cylinder 1.
  • the main pressure stand in the projection area of the impression cylinder 1 is equipped with a continuous temperature control channel 10, so that only one temperature water inlet and outlet 11, 12 are necessary. This has the advantage over a multi-part temperature control system to be acted on in parallel that the temperature of the temperature control medium is equally strong in all areas.
  • FIG. 2 shows the side view of a single-cylinder flexographic printing press frame with six printing units analogous to FIG. 1, but with four separate temperature control channels 13, 14, 15 and 16 with the inlet and outlet connections 13a, b, 14a, b, 15a, b and 16a , b.
  • a duct guide according to FIG. 2 offers the advantage over the duct guide according to FIG. 1 that the flow through the four temperature control areas, depending on the loading of the connections 13a, b, 14a, b, 15a, b and 16a, b, is both a series connection according to FIG. 1 and also allows a parallel connection.
  • Fig. 3 shows a printing machine frame according to Fig. 1 and 2, in which, however, in contrast to the previous figures, only the temperature control channels 16 and 17 are shown, which serve to shield the heat radiation which 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 press frame for the intermediate drying are designated 19 and 20, respectively.
  • the impression cylinder 1 is supported on both sides. Therefore, a printing machine frame has 1 main pressure stand on both sides of the impression cylinder.
  • the supply and exhaust air pipes 19, 20 for the intermediate drying are generally supplied from one side only, so that the temperature control channels 16 and 17 according to FIG. 3 are only subjected to the temperature control medium on the machine side on which the air guiding elements are located need.
  • the temperature control channels 16, 17 according to FIG. 3 cannot be accommodated in every machine type for reasons of space. It is then advantageous to screw a tempering coil 21, preferably cast from aluminum, against the breakthrough from the inside against the relevant printing unit console 5 or for the temperature coil 17 from the inside against the main frame 2.
  • the temperature control coil 21 (cf. FIG. 4) has a cast-in temperature control channel 24 with the supply and discharge bore 22 or 23. Via the screw holes 25, this temperature control coil 21, which is finely machined on the underside 26, is to be screwed on via the screw holes 25, with one Good heat transfer from the temperature control coil 21 to the printing unit console 5 in question is to be ensured, if necessary with the aid of a specially heat-conducting adhesive or a sealant or jointing compound.
  • Fig. 5 shows a perspective view of a simplified section of a larger temperature coil, which essentially consists of the conduit 27 for the tempering medium and a screw-on plate 28 which is welded to the conduit 27 with the weld 29. 5 can be screwed onto the smooth, non-ribbed side of the main stand as an alternative to the cast-in temperature channels 10 or 13 to 16 according to FIGS. 1 and 2 against the printing machine frame (s), with a very good heat transfer from the mounting plate 28 to the main frame 2 or the frames 4.
  • a printing machine frame with a screwed-on temperature control system is preferably covered by another cover, especially towards the ribbed side, with the aid of a cover plate 37 against one another, since a temperature control coil attached can in any case achieve less heat dissipation than a cast-in temperature control circuit according to FIGS. 1 and 2 To protect unimpeded heat entry from the outside.
  • An analog cover plate according to FIG. 6 serves to prevent the unhindered heat radiation from the supply and exhaust air pipes 19 and 20 for the intermediate drying onto the printing unit consoles 5 and thus to facilitate the temperature control by means of the temperature control coil 21 placed on the inside.
  • 6 gives a schematic illustration. It shows the section through the printing unit console 5, the temperature control coil 21 with the cast-in temperature control channel 24 for guiding the temperature control medium, the supply and exhaust air pipes 19 and 20 and the cut-off shield 30, which is screwed to the temperature control coil 21 or the printing unit console 5 in poor heat conduction , wherein the shield 30 is preferably attached via holding tabs 31 made of plastic at a short distance both to the temperature control coil 21 and the printing unit console 5 and to the air guide tubes 19 and 20.
  • temperature measuring points 32 are finally given, at which the current temperature of a printing press frame can be measured and monitored, which can be used once for a display, but in particular can also be used in software for numerically controlled printing units for automatic readjustment of the printing unit feeds .
  • the temperature control of the printing press frame can also be achieved by an air flow: In this case, however, care must be taken that Air flow in the printing press frame does not cause any air movement in the outer area of the printing press frame, which could have a negative effect on the printing process.
  • Fig. 7 shows a horizontal section of a plan view with the cut printing press frame, the impression cylinder 1, an outer cover plate 37 and an inner two-part shielding plate 33.
  • the temperature control air flows through ribs divided into spaces 35 in the printing press frame in the vertical direction.
  • the cover plate 37 is screwed onto the press machine frame 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 Flexodruckmaschine mit temperaturstabilisiertem Druckmaschinengestell Expired - Lifetime EP0150047B1 (de)

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 EP0150047A2 (de) 1985-07-31
EP0150047A3 EP0150047A3 (en) 1987-08-26
EP0150047B1 true EP0150047B1 (de) 1990-08-01

Family

ID=6225275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100445A Expired - Lifetime EP0150047B1 (de) 1984-01-18 1985-01-17 Flexodruckmaschine mit temperaturstabilisiertem Druckmaschinengestell

Country Status (5)

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

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545272C1 (de) * 1985-12-20 1987-02-26 Roland Man Druckmasch Gestell einer Rotationsdruckmaschine mit zwischen Seitenwaenden gelagerten Druckwerkzylindern und Reibwalzen
JP2581054Y2 (ja) * 1992-06-04 1998-09-17 株式会社小森コーポレーション 印刷機
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
EP1498263B1 (en) * 2002-03-20 2007-09-26 Comexi, SA Flexographic printer with enclosures at a regulated temperature and vapour 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
ATE311981T1 (de) 2003-07-03 2005-12-15 Fischer & Krecke Gmbh & Co Druckmaschine
ES2262925T3 (es) * 2003-07-03 2006-12-01 FISCHER & KRECKE GMBH & CO. Maquina de imprimir.
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
ES2374784B1 (es) * 2010-06-01 2013-01-24 Comexi Group Industries, Sau Máquina impresora.
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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DE487851C (de) * 1929-12-18 Fallert & Co A G Formzylinder fuer Rotationstiefdruckmaschinen
DD92630A (es) *
US680135A (en) * 1900-11-30 1901-08-06 George F Drew Means for cooling calender-rolls.
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Also Published As

Publication number Publication date
DE3401626A1 (de) 1985-07-18
DE3578920D1 (de) 1990-09-06
EP0150047A3 (en) 1987-08-26
JPS61160250A (ja) 1986-07-19
US5048418A (en) 1991-09-17
EP0150047A2 (de) 1985-07-31
JPH0369307B2 (es) 1991-10-31
ES539652A0 (es) 1986-04-01
ES8606130A1 (es) 1986-04-01

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