EP0611649B1 - Vorrichtung und Verfahren zum Austauschen von Rabeln in Flexodruckmaschinen - Google Patents

Vorrichtung und Verfahren zum Austauschen von Rabeln in Flexodruckmaschinen Download PDF

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Publication number
EP0611649B1
EP0611649B1 EP94100378A EP94100378A EP0611649B1 EP 0611649 B1 EP0611649 B1 EP 0611649B1 EP 94100378 A EP94100378 A EP 94100378A EP 94100378 A EP94100378 A EP 94100378A EP 0611649 B1 EP0611649 B1 EP 0611649B1
Authority
EP
European Patent Office
Prior art keywords
subframe
holder
blades
fountain
roll
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
EP94100378A
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English (en)
French (fr)
Other versions
EP0611649A1 (de
Inventor
James E. Hertel
Dale E. Zeman
Dennis W. Ehlers
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.)
Paper Converting Machine Co
Original Assignee
Paper Converting Machine Co
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
Priority claimed from US08/147,849 external-priority patent/US5406887A/en
Application filed by Paper Converting Machine Co filed Critical Paper Converting Machine Co
Publication of EP0611649A1 publication Critical patent/EP0611649A1/de
Application granted granted Critical
Publication of EP0611649B1 publication Critical patent/EP0611649B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers

Definitions

  • This invention relates to an apparatus and method for doctor blade replacement in a flexographic press and, more particularly, to a fountain embodying a movable holder for the blades.
  • doctor blades are provided to define the upper and lower ends of a fountain associated with an ink transfer roll -- such as an anilox roll.
  • an ink transfer roll such as an anilox roll.
  • Illustrative of the basic structure is that shown in co-owned Patent 5,125,341.
  • Bolts have to be loosened and then retightened in order to clamp the doctor blades and if the operation is not carefully handled, a wave will be introduced into the blade.
  • This is avoided by the instant invention which provides a doctor blade holder which is movably mounted on a sub-frame of the press.
  • the sub-frame of the press is part of the basic fountain structure and is located immediately adjacent the anilox roll.
  • the sub-frame has portions for clamping the doctor blade in place on the holder and bearing against the anilox roll.
  • the invention makes it possible to equip the movable holder with the blades at either the press or at a location remote from the press -- but in any event, quickly install the blades thereby avoiding the laborious operations of the past.
  • the numeral 20 designates generally a fragment of the frame of the flexographic press. A similar fragment is seen in FIGS. 3 and 6. Other details of the frame are omitted for ease of presentation but additional details can be seen in co-owned Patent 5,012,736.
  • the frame 20 rotatably supports an anilox roll generally designated 21 which can be considered an ink transfer roll of the type described in greater detail in the above-mentioned 5,012,736 patent.
  • an anilox roll generally designated 21 Movably mounted on the frame for coaction with the anilox roll 21 is a subframe generally designated 22 and which is seen to be essentially C-shaped in side elevation. Still referring to FIG. 1, it is seen that the subframe 22 carries fluid pressure cylinder means 23. These cylinder means in turn carry the blade-mounting holder 24.
  • the holder 24 is equipped with an upper doctor blade 25 and lower doctor blade 26. These blades, along with end seals 27 (only one seen at the left of FIG. 1), holder 24 and anilox roll 21 define an ink chamber 28 (see FIG. 2).
  • ink is contained in ink pail 29 and is delivered through supply line 30 by motorized pump 31.
  • the ink enters a lower port 32 in the holder 24 and the excess exits from an upper port (not shown) through the return line 33 to the pail 29.
  • FIG. 2 shows the orientation of the just-described elements during "inking", i.e., printing.
  • the doctor blades 25, 26 are firmly clamped to the holder by the subframe 22.
  • the ends of the subframe adjacent the anilox roll 21 are equipped with a top clamp bracket 34 and a bottom clamp bracket 35 -- see the right and central portions of FIG. 5.
  • These brackets extend the length of the blades -- see for example, the bracket 35 in FIG. 6.
  • a plurality of cylinders 23 are provided along the bracket length for uniform clamping pressure.
  • the subframe 22 is pivotally mounted on the press frame as at 36 and the pivoted "away" position is seen in FIGS. 4-6. Then the holder is withdrawn from the brackets 34, 35 by the cylinder means 23 -- see FIG. 4.
  • the pivot axis 36 is located on the frame 20 so that both the edge of the lower doctor blade 26 and the part of the bracket 35 closest to the anilox roll 21 will clear the roll and without the need for translating the subframe 22.
  • FIGS. 3 and 6 Each of these fragmentary perspective views is generally in the direction of the arrow A as applied to FIG. 1. So, in FIG. 3, the hose 30 is readily seen. So also is the handle 39 and cylinder means 23.
  • FIG. 6 the same three elements are designated, viz., 23, 30 and 39. Also seen clearly in FIG. 6 is the locking pin 41. This is the pin held in place by thumb screw 37 -- compare FIGS. 2 and 4.
  • FIG. 6 there is seen a slot 41a provided in the frame 20 which receives the pin 41 when the fountain is in the inking or printing mode.
  • the pins 41 (one at each end) are carried by an adapter bar 42 -- see FIGS. 4 and 5.
  • the bar 42 is slidably mounted on the subframe 22 and carries the holder 24 and the cylinder means 23.
  • the piston rod 43 of the cylinder means 23 is attached to the bight portion 44 of the subframe 22 -- still comparing the right portions of FIGS. 4 and 5.
  • FIGS. 8 and 9 the numerals 121 designates an anilox roll.
  • a holder 124 is provided which has doctor blades 125 and 126 held on by magnets 145, 146 (see FIG. 9).
  • the essential difference of this embodiment from that of FIGS. 1-6 is in the provision of a different subframe generally designated 122. However, as before, the subframe 122 and the holder 124 make up the fountain and the subframe 122 is again generally C-shaped.
  • the bracket 147 is slidably supported on rods 148 which constitute the lower legs of the C-shaped subframe 122 (see also FIG. 7).
  • the rods 148 are rigidly fixed in the subframe 122 and, more particularly to the bight portion 149 of the generally C-shaped subframe 122.
  • Pivotally mounted on the upper end of bight portion 149 is clamp member 134 -- see the extreme right of FIG. 9.
  • Completing the C-shape is the bottom clamp member 135 mounted on rods 148.
  • the members 134 and 135 clamp the doctor blades 125, 126 against the holder 124 so as to define chamber 128 (see FIG. 8).
  • bracket 147 is equipped with an end bore 150 which provides journal 151.
  • a similar arrangement is provided at the right hand end (not shown) so as to rotatably support the overall fountain assembly on the machine frame (not shown).
  • the subframe 122 is retracted away from the anilox roll 121. This can be appreciated from a consideration of FIG. 9. This differs from the showing in FIG. 8 where the fountain is in operational position with the doctor blades 125, 126 bearing against the anilox roll 121.
  • the pancake cylinder 123 is energized to unclamp the holder 124.
  • the cylinder 123 is rigidly mounted on the bight portion 149.
  • the piston rod 150 of the cylinder 123 extends through the portion 149 and is coupled to the L-shaped bracket 147.
  • the bight portion 149 moves toward the L-shaped bracket 147. This unclamps the lower blade 126 from the angled surface of the member 135 (see the upper left center of FIG. 9).
  • the member 134 For unclamping the blade 125 from the clamping surface on the member 134, the member 134 is pivoted by the withdrawing action of the piston rod of the cylinder 123. More particularly, the member 134 is pivotally mounted as at 151 at the upper end of the bight portion 149. As the piston rod 150 is retracted (going from the FIG. 8 showing to that of FIG. 9), the bight portion 149 moves to the left and the number 134 bears against and pivots on a mushroom-shaped button 152. This unclamps the upper blade 125. The member 134 is urged back into clamping position by the torsion spring 154 -- so that when fluid pressure is removed from the cylinder 123, the spacing 153 moves the member 134 back to its FIG. 8 position. This occurs by virtue of the torsion spring 153 being fixed at its lower end as at 153a and bears against a post 153b on member 134 at its upper end.
  • the frame 220 supports an anilox roll generally designated 221.
  • a subframe generally designated 222 Movably mounted on the frame for coaction with the anilox roll 221 is a subframe generally designated 222 and which is seen to include two portions or members 254 and 255. These members are pivotally interconnected at 256 and the member 255 can be pivoted to the position 255' shown in dotted line.
  • This is advantageously achieved through a pressure fluid cylinder 223 which is mounted on a clevis fixed to the member 254.
  • the piston rod 257 of the pressure fluid cylinder is seen to be equipped at its work end with an arm 258 rigidly connected to the upper member 255. Retraction of the rod 257 pivots the upper member 255 to the 255' position and effectively unclamps the holder 224.
  • each of the members 254, 255 is generally L-shaped so as to provide parts for clamping the upper doctor blade 225 against an angled clamp surface 258 provided as part of an arm 259 which in turn is provided as part of the holder generally designated 224.
  • the holder 224 and subframe 222 make up a fountain F.
  • the lower member 254 clamps the lower doctor blade 226 against the surface 260 provided on the holder 224.
  • the holder 224 is C or channel shaped having the arms 259, 261 connected by a bight portion 262. Completing the closing of the fountain are end seals as at 227 in FIG. 11.
  • liquid to be taken up by the transfer roll 221 is introduced via the conduit 263 into an inlet port in the member 254 and through an aligned port in the holder 224.
  • the member is recessed so as to accommodate the installation of an O-ring 264.
  • the cavities in the anilox roll can be filled under the control of the upper doctor blade 225 -- assuming the rotation of the anilox roll to be in the direction of the arrow applied thereto. With reverse rotation, the doctoring is provided by the blade 226.
  • the fountain chamber 228 When holder replacement is indicated -- worn doctor blades, change of liquid, etc., the fountain chamber 228 is drained and the cylinders 223 actuated to pivot the member 255 to the dotted line position 255'.
  • the member 254 is moved relative to the frame 220 to space the fountain F from the anilox roll 221.
  • a suitable mechanism for this can be seen in co-owned Patent No. 5,184,556. This permits the holder 224 to be withdrawn from its mounting.
  • doctor blades 225, 226 are mounted against the bearing surfaces on the holder 224 and because they are normally made of ferrous material may be advantageously held in place temporarily by use of magnets 245, 246.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Cleaning In Electrography (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Coating Apparatus (AREA)
  • Paper (AREA)

Claims (10)

  1. Farbkasten für eine Flexodruckmaschine mit einem Gestell (2) mit einer Farbhebewalze (21, 121, 221), einem auf dem Gestell an die Walze angrenzende angeordneten Untergestell (22, 122, 222), einem bewegbar auf dem Untergestell angeordneten Halter (24, 124, 224), der mit einer oberen und einer unteren Farbrakel (25, 26; 125, 126; 225, 226), die an der Walze anliegen, sowie Endabschlüssen (27, 227) ausgerüstet ist, die zusammen mit der Walze eine Farbkammer bilden, sowie mit einer Farbzulaufeinrichtung (32, 263) und einer Farbablaufeinrichtung (33, 266) im Halter, wobei das Untergestell Teile (34, 35; 134, 135, 254, 255) aufweist, die die Farbrakeln auf dem Halter festspannen.
  2. Farbkasten nach Anspruch 1, bei dem der Halter eine obere (258) und eine untere Rakeltragfläche (260) sowie Einrichtungen (245, 246) aufweist, die der Fläche jeweils zugeordnet sind, um die Rakeln vorübergehend auf den Flächen zu halten.
  3. Farbkasten nach Anspruch 2, bei dem die Halteeinrichtung eine magnetische Einrichtung aufweist und die Farbrakeln aus einem Eisenwerkstoff aufgebaut sind.
  4. Farbkasten nach Anspruch 1, bei dem das Untergestell allgemein C-förmig und mit einer Druckmittelzylindereinrichtung (23, 123, 223) ausgerüstet ist, die betrieblich mit dem Halter gekoppelt ist, um die Klingen zu lösen.
  5. Farbkasten nach Anspruch 1, bei dem Schwenkeinrichtungen (36, 151) das Untergestell (22, 122) mit dem Gestell (20) verbinden.
  6. Farbkasten nach Anspruch 1, bei dem das Untergestell ein Paar (134, 149; 254, 255) schwenkbar miteinander verbundener Untergestellelemente aufweist.
  7. Farbkasten nach Anspruch 6, bei dem eines (134) der Untergestellelemente mit einer Stangeneinrichtung ausgerüstet ist, auf der ein L-förmiger Winkel (147) verschiebbar angeordnet ist.
  8. Verfahren zum Austauschen der Farbrakeln in einem Farbkasten für eine Flexodruckpresse nach Anspruch 1, bei dem man ein mit einer Farbhebewalze versehenes Gestell, ein neben der Walze bewegbar auf dem Gestell angeordnetes Untergestell, einen bewegbar auf dem Untergestell angeordneten Halter, der mit einer oberen und einer unteren Farbrakel, die an der Walze anliegen, sowie mit Endabschlüssen versehen ist, die mit der Walze zusammen eine Flüssigkeitskammer bilden, sowie eine Farbzu- und eine Farbablaufeinrichtung im Halter vorsieht, wobei das Untergestell Teile aufweist, die die Farbrakeln auf dem Halter festspannen, das Untergestell von der Farbhebewalze hinwegbewegt und den Halter relativ zum Untergestell bewegt, um die Rakeln zu lösen.
  9. Verfahren nach Anspruch 8, bei dem man die Spannteile in einer Länge vorsieht, die im wesentlichen der Länge der Farbrakeln entspricht, und den Festspanndruck in längsbeabstandeten Bereichen der Festspannteile aufbringt, um die Rakeln im wesentlichen gleichmäßig festzuspannen.
  10. Verfahren nach Anspruch 9, bei dem man den Halter mit Einrichtungen versieht, die die Rakeln vorübergehend abstützen, bis die Festspannteile des Untergestells in den Festspanneingriff mit den Rakeln gebracht werden.
EP94100378A 1993-01-15 1994-01-12 Vorrichtung und Verfahren zum Austauschen von Rabeln in Flexodruckmaschinen Expired - Lifetime EP0611649B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US494893A 1993-01-15 1993-01-15
US4948 1993-01-15
US147849 1993-11-03
US08/147,849 US5406887A (en) 1993-01-15 1993-11-03 Apparatus and method for doctor blade replacement in a flexographic press

Publications (2)

Publication Number Publication Date
EP0611649A1 EP0611649A1 (de) 1994-08-24
EP0611649B1 true EP0611649B1 (de) 1997-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100378A Expired - Lifetime EP0611649B1 (de) 1993-01-15 1994-01-12 Vorrichtung und Verfahren zum Austauschen von Rabeln in Flexodruckmaschinen

Country Status (6)

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EP (1) EP0611649B1 (de)
AT (1) ATE159892T1 (de)
AU (1) AU5306694A (de)
BR (1) BR9400108A (de)
CA (1) CA2113308A1 (de)
DE (1) DE69406566T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105058981A (zh) * 2015-09-09 2015-11-18 温州方力机械有限公司 一种柔版印刷机的上墨装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517918A (en) * 1994-07-29 1996-05-21 Fischer & Krecke Gmbh & Co. Doctor blade clamping assembly for a printing press
CH693305A5 (fr) * 1999-03-05 2003-05-30 Bobst Sa Dispositif d'encrage amovible pour une machine d'impression flexographique.
EP1196287B1 (de) 1999-06-22 2003-02-12 Tresu Production A/S Kammerrakelsystem
ES2370776B1 (es) * 2010-06-01 2012-11-06 Comexi Group Industries, Sau Dispositivo de rasqueta para máquina impresora.
DE102019109776A1 (de) * 2019-04-12 2020-10-15 Koenig & Bauer Ag Flexo-Druckmaschine
CN112009078B (zh) * 2020-09-16 2022-04-19 江苏正红彩印有限公司 一种消声绿色环保凹印印刷装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521561A (en) * 1968-01-15 1970-07-21 Talcott Inc James Method and apparatus for contouring a rotogravure doctor blade
DE2121753C3 (de) * 1971-05-03 1979-10-11 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Festspannen des Rakelmessers im Rakelträger von Tiefdruck-Rotationsmaschinen
CA1108469A (en) * 1976-12-21 1981-09-08 John Grosart Inking device
GB8711096D0 (en) * 1987-05-11 1987-06-17 Vickers Plc Printing
US5150651A (en) * 1991-06-10 1992-09-29 Flores Carlos R Doctor-blade assembly for flexographic press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105058981A (zh) * 2015-09-09 2015-11-18 温州方力机械有限公司 一种柔版印刷机的上墨装置

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Publication number Publication date
DE69406566D1 (de) 1997-12-11
CA2113308A1 (en) 1994-07-16
DE69406566T2 (de) 1998-03-05
BR9400108A (pt) 1994-08-02
ATE159892T1 (de) 1997-11-15
AU5306694A (en) 1994-07-21
EP0611649A1 (de) 1994-08-24

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