EP0739729A2 - Druckfarbewechselvorrichtung - Google Patents

Druckfarbewechselvorrichtung Download PDF

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Publication number
EP0739729A2
EP0739729A2 EP96104806A EP96104806A EP0739729A2 EP 0739729 A2 EP0739729 A2 EP 0739729A2 EP 96104806 A EP96104806 A EP 96104806A EP 96104806 A EP96104806 A EP 96104806A EP 0739729 A2 EP0739729 A2 EP 0739729A2
Authority
EP
European Patent Office
Prior art keywords
ink
waste liquid
circulation
supply mechanism
wash liquid
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
EP96104806A
Other languages
English (en)
French (fr)
Other versions
EP0739729A3 (de
EP0739729B1 (de
Inventor
Yasuyuki C/O Mihara Machinery Works Baba
Arifumi C/O Mihara Machinery Works Okamoto
Kunio C/O Mihara Machinery Works Niuchi
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0739729A2 publication Critical patent/EP0739729A2/de
Publication of EP0739729A3 publication Critical patent/EP0739729A3/de
Application granted granted Critical
Publication of EP0739729B1 publication Critical patent/EP0739729B1/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
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/04—Cleaning arrangements or devices for inking rollers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/30—Recovering used solvents or residues
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/30—Recovering used solvents or residues
    • B41P2235/31—Recovering used solvents or residues by filtering

Definitions

  • the present invention relates to an ink exchange apparatus for use in a flexographic printer etc. in which an ink exchange at the time of a color change accompanying with an order change is automatically made.
  • a usual ink exchange apparatus used in a flexographic printer as shown in Fig. 4(a), comprises an ink circulation and supply mechanism for circulating ink between one of ink tanks and a printing unit and supplying the ink to the printing unit; an ink tank exchange mechanism for connecting a joint portion to the ink tank of said ink circulation and supply mechanism selectively to one of the ink tanks; and a wash liquid supply mechanism for supplying a wash liquid to said ink circulation and supply mechanism at the time of washing of said ink circulation and supply mechanism.
  • Fig. 4(a) is a perspective view of the ink exchange apparatus
  • Fig. 4(b) is a side view of the printing unit consisting of inking rolls (an anilox roll and a rubber roll), a printing cylinder and an impression roll
  • Fig. 5 is a flow chart showing an operation of said ink exchange apparatus.
  • the printing unit of a flexographic printer is constructed as shown in Figs. 4(a), (b). That is, numeral 28 designates the printing cylinder having a printing die 29 fitted around its outer circumferential face, numeral 30 designates an impression roll disposed opposingly to said printing cylinder 28, numeral 1 designates the anilox roll (inking roll) and numeral 2 designates the rubber roll (inking roll), all of which compose the printing unit.
  • Numeral 3 designates a flexographic ink and said flexographic ink 3 is supplied into a nip portion P between the anilox roll 1 and the rubber roll 2 from the ink tank 4a (or ink tank 4b) through an ink pump 7 and an ink supply pipe 8.
  • the ink 3 supplied into the nip portion P is doctored by the rubber roll 2 and is transferred uniformly onto the outer circumferential face of the anilox roll 1 and is further transferred onto the printing die 29 by a contact of the surface of the anilox roll 1 and the printing die 29 fitted around the outer circumferential face of the printing cylinder 28.
  • a sheet 31, such as a corrugated board sheet, to be printed passes between the printing cylinder 28 and the impression roll 30 and comes in contact with the printing die 29, thus a desired printing is made on the sheet 31.
  • the ink 3a within the ink tank 4a is supplied into said nip portion P, and an excess ink 3a overflows from both ends of said nip portion P, flows down into end pans (ink reservoirs) 15a, 15b and returns to the ink tank 4a through return pipes (discharge pipes) 10a, 10b.
  • the ink 3a circulates in said ink circulation and supply mechanism while printing is made, and after a desired printing is finished, an order change (ink color change and printing die exchange) becomes necessary.
  • Numerals 11a, 11b designate ink supply ports of the ink tanks 4a, 4b
  • numerals 5, 5 designate covers of the ink tanks on which said ink supply ports 11a, 11b are provided
  • numeral 12 designates a joint provided at the lower end portion of the ink supply pipe 8, and said joint 12 is fitted detachably to either one of the ink supply ports 11a, 11b.
  • Numeral 13 designates a filter provided in the middle of the ink supply pipe 8
  • numeral 7 designates an ink pump provided on the upper side of said filter 13 in the middle of said ink supply pipe 8
  • numeral 14 designates an ink funneling device provided at the upper end portion of the ink supply pipe 8, and said ink funneling device is disposed immediately above the nip portion between the anilox roll 1 and the rubber roll 2.
  • Numerals 15a, 15b designate end pans disposed immediately below both end portions of the anilox roll 1 and the rubber roll 2
  • numerals 10a, 10b designate return pipes (discharge pipes) elongating from said end pans 15a, 15b
  • numeral 10 designates a return pipe (discharge pipe) connecting to said return pipes 10a, 10b, and the lower end portion of said return pipe 10 connects to either one of return ports 6a, 6b of the ink tanks 4a, 4b.
  • Numeral 16 designates a wash liquid pipe, and said wash liquid pipe 16 connects to the ink supply pipe 8 via a solenoid valve 18 and a T-type joint 17.
  • Numeral 20 designates a joint elevating cylinder
  • numeral 21 designates a bucket driving cylinder
  • numeral 22 designates a holder driving cylinder
  • numeral 23 designates a holder
  • numeral 25 designates a waste liquid bucket
  • numeral 32 designates a bracket connecting the joint 12 and the return pipe 10.
  • the joint 12 and the return pipe (discharge pipe) 10 are connected each other by the bracket 12 and are movable together in any direction of front and rear, right and left or up and down.
  • FIG. 5 shows a flow chart at the time of an ink exchange, wherein Fig. 5(A) shows a state of ink circulation and supply (state of ink supply start), Fig. 5(b) shows a state of ink recovery and Fig. 5(c) shows a state of ink washing by a wash liquid.
  • the ink circulation in the ink circulation passage is stopped, and as shown in Fig. 5(b), the ink is recovered into the ink tank 4a for a certain time by a timer setting.
  • the bracket 32 connecting the joint 12 and the recovery pipe (discharge pipe) 10 is elevated and is moved back, and as shown in Fig. 5(c), the joint 12 and the lower end portion of the return pipe 10 are moved to a position aside the ink tank 4a, that is, a predetermined position above the waste liquid bucket 25, and are stopped.
  • the solenoid valve 18 is opened, wash liquid is automatically supplied toward the ink funneling device 14 through the ink supply pipe 8 of the ink circulation and supply passage from the wash liquid pipe 16 via the T-type joint 17, and the insides of the ink supply pipe 8 and the ink funneling device 14 are washed, and further the ink of the nip portion between the anilox roll 1 and the rubber roll 2, the ink in the end pans 15a, 15b and the ink in the return pipes 10a, 10b, 10 are washed off.
  • the anilox roll 1 and the rubber roll 2 are making idle running and the firstly used ink sticked on the outer circumferential faces of both rolls 1, 2 and on the insides of both roll shaft end portions and the end pans 15a, 15b are washed off.
  • the wash liquid is automatically supplied to the direction of the ink tank 4a through the ink supply pipe 8 from the wash liquid pipe 16 via the T-type joint 17, and the ink of the insides of the ink supply pipe 8, the ink pump 7, the filter 13 and the joint 12 is also washed off.
  • the bracket 32 by moving the bracket 32, the joint 12 is moved to the ink supply port 11b of the ink tank 4b in which ink for the next new order is contained, and the end portion of the return pipe 10 is moved to the return port 6b of the ink tank 4b, respectively, the movement of the bracket 32 is stopped, then the bracket 32 is let down, and the joint 12 is moved to the ink supply port 11b as shown in Fig. 4(a) and is automatically connected thereto. Likewise, the end portion of the return pipe 10 is connected to the return port 6b.
  • the ink pump 7 is started, ink for the next new order is circulated in the ink circulation and supply passage and a printing by use of the ink of the new order is carried out.
  • the ink pump 7 upon finishing of a printing by use of ink of the previous order, the ink pump 7 is stopped, the circulating ink is recovered into the presently used ink tank (of the previous order), then the connection of the lower end portion of the ink circulation passage (the lower end portions of the ink supply pipe 8 and the return pipe 10) and the ink tank 4a is released, the lower end portion of the ink circulation passage is moved above the waste liquid bucket 25 by the ink tank exchange mechanism, the wash liquid supply mechanism is worked, the ink circulation passage is washed by the wash liquid, the turbid wash liquid after used for washing is discharged into the waste liquid bucket 25, then supply of the wash liquid is stopped and the turbid wash liquid is recovered for a certain time by a natural discharge. Then, the lower end portion of the ink circulation passage is connected to the ink tank 4b of the next new order and a printing by use of ink of the new order is commenced.
  • a printer ink exchange apparatus comprising a plurality of ink tanks; an ink circulation and supply mechanism for circulating ink between one of said ink tanks and a printing unit and supplying the ink to the printing unit; an ink tank exchange mechanism for connecting a joint portion to the ink tank of said ink circulation and supply mechanism selectively to one of the ink tanks; a wash liquid supply mechanism for supplying a wash liquid to said ink circulation and supply mechanism at the time of washing of said ink circulation and supply mechanism; and a waste liquid recovery unit for recovering a waste liquid after said ink circulation and supply mechanism is washed by the wash liquid, said ink circulation and supply mechanism comprises a waste liquid discharge line for discharging said waste liquid to said waste liquid recovery unit.
  • said waste liquid discharge line comprises a selector valve provided at the end portion of a return pipe to the ink tank of said ink circulation and supply mechanism for switching a passage of liquid to the direction of said waste liquid recovery unit and to the direction of said ink tank; and a waste liquid discharge pipe elongating from said selector valve to said waste liquid recovery unit.
  • the selector valve is switched to the direction of the ink tank, wash liquid is supplied to the ink circulation and supply mechanism, same as in the conventional ink exchange apparatus, the ink circulation and supply mechanism is washed and the waste liquid (wash liquid after used for washing) is recovered into the waste recovery unit, then the ink tank in which ink for a new order is contained and the ink supply pipe of the ink circulation and supply mechanism are connected together, the selector valve is switched to the direction of the waste liquid recovery unit, ink is supplied for a certain time, and together with said ink, the residual waste liquid (residual wash liquid) is forcibly discharged into the waste liquid recovery unit.
  • the selector valve is switched to the direction of the ink tank, the ink for a new order is circulated in the ink circulation and supply mechanism and the ink is supplied to the printing unit.
  • FIG. 1 is a perspective view of said ink exchange apparatus and Fig. 2 is a flow chart showing functions (operation status) of said ink exchange apparatus.
  • numeral 1 designates an anilox roll
  • numeral 2 designates a rubber roll
  • numeral 3 designates a flexographic ink
  • numerals 4a, 4b designate ink tanks
  • numerals 5 designate covers of said ink tanks 4a, 4b
  • numerals 6a, 6b designate return ports provided on said covers 5
  • numeral 7 designates an ink pump
  • numeral 8 designates an ink supply pipe
  • numeral 10 designates a return pipe (discharge pipe)
  • numerals 11a, 11b designates supply ports provided on said covers 5
  • numeral 12 designates a joint
  • numeral 13 designates a filter
  • numeral 14 designates an ink funneling device
  • numerals 15a, 15b designate end pans
  • numeral 16 designates a wash liquid pipe
  • numeral 17 designates a T-type joint
  • numeral 18 designates a solenoid valve
  • numeral 20 designates a joint
  • numeral 21 designates a bucket driving
  • the ink pump is first stopped and, as shown in Fig. 2(b), the ink in the ink circulation and supply passage is recovered into the ink tank 4a.
  • the three-way valve 26 is switched to the direction of the ink tank 4a.
  • the solenoid valve 18 is opened, wash liquid is automatically supplied toward the anilox roll 1 and the rubber roll 2 from the wash liquid pipe 16 via the T-type joint 17, and the inside of the ink supply pipe 8 and the inside of the ink funneling device 14 are washed. Further, the ink in the roll nip portion, the ink in the end pans 15a, 15b and the ink in the return pipes 10a, 10b, 10 are washed off.
  • the anilox roll 1 and the rubber roll 2 are making idle running and the firstly used ink sticked on the outer circumferential faces of both rolls 1, 2 and on the insides of both roll shaft end portions and end pans 15a, 15b are washed off.
  • the wash liquid is also automatically supplied toward the ink tank 4a from the wash liquid pipe 16 via the T-type joint 17, and the ink of the inside of the ink supply pipe 8 and the ink of the insides of the ink pump 7, the filter 13 and the joint 12 are washed off.
  • Supply and stop of the wash liquid are controlled by a time adjustable timer etc., and upon a signal given after a certain time passes, the solenoid valve 18 is closed, the supply of wash liquid is stopped and the next process is commenced.
  • the holder 23 Upon finish of the wash liquid recovery, as shown in Fig. 2(d), the holder 23 is advanced by the bucket driving cylinder 21, and the joint 12 on the side of the ink supply pipe 8 of the ink circulation and supply passage is let down by the joint elevating cylinder 20 so as to approach to the supply port 11b of the ink tank 4b of the next new order and is connected thereto automatically.
  • the three-way valve (electromagnetic valve) 26 is switched to the direction of the waste liquid bucket (waste liquid recovery unit) 25. Then, the ink supplied by the ink pump 7 pushes out forcibly for a certain time, and is diluted itself by, the residual waste liquid (residual wash liquid) in the ink circulation and supply passage, so that the waste liquid is discharged through the waste liquid discharge pipe 27 into the waste liquid bucket (waste liquid recovery unit) 25 provided on the outside of the ink tanks.
  • said forcible discharge time is controlled by a timer setting made on experiences with feedback of a sensor detected signal of the color of the returning waste liquid, or by judgement of an operator seeing the color.
  • the three-way valve 26 is switched to the direction of the ink tank 4b, the returning ink 3b is recovered into the ink tank 4b, and the ink 3b in the ink tank 4b is circulated in the ink circulation and supply mechanism and is supplied to the printing unit.
  • the ink exchange time is greatly shortened. And as the diluted ink is not returned to the ink tank, a lowering of the ink viscosity is prevented.
  • the three-way valve 26 is used as a selector valve, but not limited to the three-way valve, a two-way valve 33 shown in Fig. 3 may be used.
  • a two-way valve 33 is provided below the discharge pipe 10.
  • Fig. 3(b) shows a printing unit in which ink or water returning from the return pipe 10 is once stored in an ink reservoir 35 and then is sucked up by a discharge pump 34, and in this case also, a two-way valve 33 is provided at the ink reservoir 35.
  • the discharge pump 34 is stopped and the two-way valve 33 is opened, thereby the residual waste liquid (residual wash liquid) is prevented from mixing in the ink tank 4b of the new order. In such way, the two-way valve 33 may be used.
  • the selector valve is switched to the direction of the ink tank, wash liquid is supplied to the ink circulation and supply mechanism, same as in the conventional ink exchange apparatus, the ink circulation and supply mechanism is washed and the waste liquid (wash liquid after used for washing) is recovered into the waste recovery unit, then the ink tank in which ink for a new order is contained and the ink supply pipe of the ink circulation and supply mechanism are connected together, the selector valve is switched to the direction of the waste liquid recovery unit, ink is supplied for a certain time, and together with said ink, the residual waste liquid (residual wash liquid) is forcibly discharged into the waste liquid recovery unit.
  • the selector valve is switched to the direction of the ink tank, the ink for a new order is circulated in the ink circulation and supply mechanism and the ink is supplied to the printing unit.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Ink Jet (AREA)
EP19960104806 1995-04-27 1996-03-26 Druckfarbewechselvorrichtung Expired - Lifetime EP0739729B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10407995A JP3592788B2 (ja) 1995-04-27 1995-04-27 フレキソ印刷機のインキ交換方法
JP104079/95 1995-04-27
JP10407995 1995-04-27

Publications (3)

Publication Number Publication Date
EP0739729A2 true EP0739729A2 (de) 1996-10-30
EP0739729A3 EP0739729A3 (de) 1998-03-11
EP0739729B1 EP0739729B1 (de) 2001-07-25

Family

ID=14371146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960104806 Expired - Lifetime EP0739729B1 (de) 1995-04-27 1996-03-26 Druckfarbewechselvorrichtung

Country Status (4)

Country Link
EP (1) EP0739729B1 (de)
JP (1) JP3592788B2 (de)
AU (1) AU678932B2 (de)
DE (1) DE69614027T2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763536A1 (fr) * 1997-05-21 1998-11-27 Roland Man Druckmasch Unite d'encrage comportant un dispositif pour remplir d'encre d'impression les encriers
EP0924074A1 (de) * 1997-12-20 1999-06-23 MAN Roland Druckmaschinen AG Einrichtung zum Dosieren einer Beschichtungsflüssigkeit für Bedruckstoffe in einer Druckmaschine
WO1999065683A1 (de) * 1998-06-16 1999-12-23 Koenig & Bauer Ag Verfahren und einrichtung zur farbzufuhr
EP2138307A1 (de) * 2008-06-27 2009-12-30 Gaviplas, S.L. Tintenwiederverwendungssystem für Druckmaschinen
CN106079886A (zh) * 2016-06-05 2016-11-09 镇江立昌智能装备有限公司 封闭式给墨装置
US11446922B2 (en) 2017-09-22 2022-09-20 Bobst Firenze S.R.L. Inking system with embedded colour correction
CN115257152A (zh) * 2022-07-18 2022-11-01 安徽富禾包装科技股份有限公司 一种凹版印刷机的油墨循环装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4758207B2 (ja) * 2005-11-24 2011-08-24 東北リコー株式会社 孔版印刷装置
CN108312692B (zh) * 2018-01-31 2019-06-04 重庆华康印务有限公司 一种印刷装置
CN109203670B (zh) * 2018-06-22 2020-10-27 安徽金辉印务有限公司 一种用于印刷机自动加墨装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025793A (en) * 1958-05-07 1962-03-20 Miehle Goss Dexter Inc Method and apparatus for changing inks in printing press fountains
US3800702A (en) * 1972-12-07 1974-04-02 S & S Corrugated Paper Mach Inking apparatus having automatic wash-up means
US4526102A (en) * 1983-10-31 1985-07-02 Molins Machine Company, Inc. Ink circulation and wash up system for a press
JPH072200Y2 (ja) * 1988-04-18 1995-01-25 三菱重工業株式会社 印刷装置
GB2289651B (en) * 1992-03-17 1996-03-13 John Marozzi Flexographic printing system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763536A1 (fr) * 1997-05-21 1998-11-27 Roland Man Druckmasch Unite d'encrage comportant un dispositif pour remplir d'encre d'impression les encriers
EP0924074A1 (de) * 1997-12-20 1999-06-23 MAN Roland Druckmaschinen AG Einrichtung zum Dosieren einer Beschichtungsflüssigkeit für Bedruckstoffe in einer Druckmaschine
WO1999065683A1 (de) * 1998-06-16 1999-12-23 Koenig & Bauer Ag Verfahren und einrichtung zur farbzufuhr
US6561099B1 (en) 1998-06-16 2003-05-13 Koenig & Bauer Ag Inking method and apparatus
EP2138307A1 (de) * 2008-06-27 2009-12-30 Gaviplas, S.L. Tintenwiederverwendungssystem für Druckmaschinen
ES2342526A1 (es) * 2008-06-27 2010-07-07 Gaviplas, S.L Sistema de reutilizacion de tinta para maquinas de impresion.
ES2342526B1 (es) * 2008-06-27 2011-05-17 Gaviplas, S.L Sistema de reutilizacion de tinta para maquinas de impresion.
CN106079886A (zh) * 2016-06-05 2016-11-09 镇江立昌智能装备有限公司 封闭式给墨装置
US11446922B2 (en) 2017-09-22 2022-09-20 Bobst Firenze S.R.L. Inking system with embedded colour correction
CN115257152A (zh) * 2022-07-18 2022-11-01 安徽富禾包装科技股份有限公司 一种凹版印刷机的油墨循环装置
CN115257152B (zh) * 2022-07-18 2024-05-31 安徽富禾包装科技股份有限公司 一种凹版印刷机的油墨循环装置

Also Published As

Publication number Publication date
DE69614027D1 (de) 2001-08-30
DE69614027T2 (de) 2002-03-21
EP0739729A3 (de) 1998-03-11
AU678932B2 (en) 1997-06-12
EP0739729B1 (de) 2001-07-25
JPH08295010A (ja) 1996-11-12
JP3592788B2 (ja) 2004-11-24
AU5041896A (en) 1997-01-02

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