EP0934166A1

EP0934166A1 - Ink duct

Info

Publication number: EP0934166A1
Application number: EP97946730A
Authority: EP
Inventors: Willi Albert Peter Kutzner; Wolfgang Günter RUCKMANN; Karl Robert SCHÄFER; Georg Schneider
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 1996-10-25
Filing date: 1997-10-17
Publication date: 1999-08-11
Anticipated expiration: 2017-10-17
Also published as: US6289807B1; DE29718388U1; RU2193974C2; EP0934166B1; JP2000505740A; CN1180937C; BR9713490A; DE59701537D1; CN1234773A; WO1998018631A1; JP3275967B2

Abstract

The invention concerns an ink duct (1) for a rotary printing press, wherein all or some of the surfaces (19, 21) are permanently coated with a substance (46) which has low surface energy of between 10 and 60 mN/m. As well as enabling the ink duct to be cleaned easily, the blending of the printing ink is improved owing to the reduced frictional resistance of the coated parts (6, 7, 13, 14), which in turn leads to more uniform use of the ink-metering roller (4).

Description

Paint box

The invention relates to an ink fountain for an inking unit of a rotary printing press according to the preamble of claim 1.

The invention has for its object to provide a paint box.

This object is achieved according to the features of the characterizing part of claim 1.

The advantages that can be achieved with the invention are, in particular, that as a result of the coating on the inside of the ink fountain and the metering elements, the surface energy and thus the surface tension and thus the frictional resistance to printing ink have been greatly reduced compared to all surfaces that come into contact with printing ink. Not only is it possible to clean the parts that come into contact with the printing ink without effort, the printing ink can mix better as a result of the reduced frictional resistance of the coated parts. In addition, a so-called "printing ink roll formation" in the ink fountain is promoted, which in turn results in a more uniform wetting of the colors. Embodiments of the invention are shown in the drawing and are described in more detail below. Show it:

Fig. 1 is a schematic representation of a

Cross section through an ink fountain arranged above an anilox roller in the working and rest position with doctor blades;

FIG. 2 is an enlarged schematic illustration of a single unit "Z" in FIG. 1.

A pivotable ink fountain 1 with the squeegees according to the invention with a working rake 11 and a rake lattice 11 is arranged in its work position A on top of a ink jet 4. The fa rbdos i e rwa Ize 4 has 2 cups 3 in its outer surface.

Seen in product direction C that is

Seh l i eß rake Ib latt 11 positively employed by Fa rbdos i e rwa Ize 4.

Seen in product c, that's

Arbe i ts ra ke Ib latt 12 made negative to Fa rbdos i e rwa Ize 4.

The ink fountain 1 consists of two left 6 and right side walls 7, which extend in the axis-parallel direction of the colors 4 and are spaced apart from one another, depending on the intended pivoting direction the left 6 and / or the right side wall 7 angled inward to a sufficient height over the entire width of the ink fountain 1.

The right / left side wall 7, 6 runs from its upper edge 10 downward, so that the clear width of the ink fountain 1 z. B. enlarged to about half the height of the ink fountain 1 and then narrowed again in the part below. In this way, in the emptying position B of the ink fountain 1, a channel 44 is formed, into which the printing ink 22 runs and is received by it. The side walls 6, 7 extend (working position A) from an upper edge 10 in the direction of their lower squeegee mounting surface 8 facing the ink roller 4; 9, on which doctor blades 11; 12 are held by means of terminal strips 13 and 14, respectively.

At the ends of the side walls 6; 7 are end walls 15 on both sides; 17 attached. Each end wall 15; 17 is adapted to the contour of the lateral surface 2 with its side 18 facing the fa rbdos ie rwa lze 4. In its emptying position B, the ink fountain 1 z. B. by the angle Beta = 70 ° to 110 ° about the axis of rotation 5 of the Fa rbdos ie rwa lze 4 are pivoted. The doctor blades 11 and 12 remain in contact with the surface 2 of the ink roller 4. The ink fountain 1 is - seen in its working position A - open at the top. The ink fountain 1 can on a cross member 20 z. B. be attached by means of its side wall 6 to the side frames of the machine.

In a further embodiment, both ends of the cross member 20 of the ink fountain 1 are each attached to a first end 28 or 29 of a swivel arm 26 or 27. The second ends 31; 32 of the swivel arms 26; 27 are each pivotable on a narrow 11 fixed bearing bush 33; 34 stored. Each bearing bush 33, 34 takes over a roller bearing 36; 37 an axle 38; 39 of Fa rbdos i e rwa lze 4. With the measures just described, the ink fountain 1 can be pivoted about the axis of rotation 5 of the roller 4.

In its upper, ie working position, the ink fountain 1 is moved directly or indirectly via the cross member 20 fastened to the swivel arms 26, 27 on a side-tight 11 fixed stop 41 and locked there or held in place by means of screws 42. The lying ink fountain 1 can be pivoted laterally from its working position A above after its unlocking into an emptying position B. The doctor blades 11 and 12 remain in contact with the circumference of the ink roller 4. The swivel angle beta of the ink fountain 1 can be between 70 and 110 °. The pivotal movement of the ink fountain 1 downward z. B. limited by a be tenges te ll fixed stop 43. On this is then the right side wall 7 of the ink fountain 1 and is held or locked to this.

The ink 22 collects in an upwardly open channel 44 of the side wall 7, which is now in a horizontal position.

The ink fountain 1, particularly in the horizontal emptying position B, can preferably be easily removed from the machine, i. H. be designed to be detachable from the crossmember 20. For this, e.g. B. the left side wall 6 can be guided and locked except by means of a linear guide in the crossmember 20.

Because the ink fountain 1 is removed from the machine, both the ink fountain 1 and the color robs 4 can be easily cleaned.

The accessibility of the pivoting of the ink fountain 1 is not limited to the means just described. It is also possible to swivel the ink fountain 1 by other technical means from position A to position B and back again.

For example, B. the end walls 15; 17 each be provided with stud bolts, the stud bolts being guided in rigid, arched guides. The ink doses 11, 12 are preferably designed as doctor blades, but they can also be ink knives, ink masks. They are arranged and fastened on the underside of the ink fountain 1. The doctor blades serve as a working doctor blade 12 and / or as a closing doctor blade 11.

To "roll" z. B. highly viscous printing ink - z. B. so-called. "UV printing ink" - in the ink fountain 1, and thus to enable better coloring of the colors, ie the roller 4, the interior of the ink fountain 1, namely the side walls 6; 7, the end walls 15; 17 and the Fa rbdos ie re lemente, ie doctor blades 11; 12 be permanently coated with a substance 46, the upper surface of which has a low z. B. has between 10 and 60 N / m. Such substances are e.g. B. PTFE or metal-free amorphous carbon fschi cht en "aC: H" (also called "DLC" -Schicht en - ch amond-J ke-c _^ a rbon-Sch i chten). These amorphous carbon layers consist of a highly cross-linked carbon network to which hydrogen is attached. By modifying the network structure fluorine (F), silicon (Si), oxygen (0) and nitrogen (N) and the percentages, the surface energy of the DLC layers can be influenced and thus the wetting behavior, hardness and wear can be chosen to be influenced.

In addition to PTFE, DLC + fluorine (F-DLC); DLC + Silicon (Si-DLC), DLC + oxygen (0-DLC) and DLC + nitrogen (N-DLC) and DLC + boron (B-DLC) can be used. F-DLC and Si-DLC are particularly suitable.

According to another embodiment variant, the surface rgi e-poor substance 46 can be used

Coal water rs tof f polymers, especially from

Poly (propylene) or poly (styrene) and copolymers exist.

Furthermore, the above-mentioned rg i e-poor substance 46 can be made from polystyrene, in particular from

Poly (styrene-stat-2,2,3,3-tetrafluoropropyl methacrylate) exist.

Furthermore, the surface rg e-poor substance 46 can be made from halogen-carbon water, in particular from

Poly (chlorotrifluoroethylene) or r

Poly (chlorotrifluoroethylene-stat-tetra luoroethylene) or poly (hexafluoropropylene) or Po ly (t et raf luoroeth hy len) or poly (tetrafluoroethylene-stat-ethylen) or Po Ly (trif luo roet hy len). Furthermore, the above-mentioned rg iea rme substance 46 from Vi ny Ipo Lyme ren, in particular from

Poly (Oιepta luoroisopropoxy) ethylene) or Poly (1 - ((heptafluoroisopropσxy) methyl) propy Len-st at-ma Le i c acid) exist.

Furthermore, the above-mentioned surface substance 46 can be made from fluorinated acryptopolymer, in particular from poly ((1-chlorodifluoromethyl) tetrafluoroethyl acrylate) or poly (di (chlo rodi f Luoromet hy L) f luoromet hy L acrylate ) or Po ly (1, 1-di hydrohept af Luorobuty l acrylate) or Po ly (1, 1 -di hydropentaf luoroi sopropy L acrylate) or Po Ly (1, 1 -d hydropentadecaf luorooc ty L acrylate) or Po Ly ( heptaf luo roi sopropy L acrylate) or poly (5- (heptaf Luoroi sopropoxy) pentyl acrylate) or Po L (11 - (hepta luoroi sopropoxy) undecy L acrylate) or poly (2- (hept af Luoropropoxy) et hy l acrylate) or Po Ly (nonaf luoroi sobuty L acrylate).

Furthermore, the surface rgi e-a rme substance 46 from especially not from Luor i e rt en Met hac ry l-Po Lyme ren

Poly (benzyl methacrylate) or poly (n-butyl methacrylate) or Po Ly (i sobuty l met ha rc ry Lat) or Poly (t-butyl methacrylate) or Poly (t-buty Lami noet hy l met hac r ry lat ) or Poly (dodecyl methacrylate) or Poly (lauryl methacrylate) or PoLy (ethyL methacrylate) or Po Ly (2-et hy Ihexy L methacrylate) or Poly (n-hexyl methacrylate) or Po Ly (di met hy Lami noet hy L methacrylate) ) or Po Ly (hydroxy t hy L methacrylate) or poly (lauryl methacrylate) or poly (phenyl methacrylate) or Po Ly (n-propyl methacrylate) or poly (stearyl methacrylate).

Furthermore, the above-mentioned rgi e-a rme substance 46 from fluorinated Met hac ry lpo Lyme ren, in particular from

Poly (1,1-dihydropentadecafluorooctyl metharylate) or Po ly (ept af Luoroi sopropy L methacrylate) or Po Ly (hept adec af luorooc ty L methacrylate) or Poly (1 -hydrot et raf Luoroet hy L methacrylate) or Po Ly ( 1, 1-di hydrot et raf luoropropy L methacrylate) or Poly (1 -hydrohexaf luoroi sopropyl methacrylate) or Poly (t-nonaf luo robuty l methacrylate) or Poly (styrene-stat-2,2,3,3 -terafluoropropyl methacrylate) exist.

Furthermore, the above-mentioned Läc henene rg iea rme substance 46 from Po Lyät he r-Mi sc hpo lyme ri seeds, z. B. from poly (oxyethylene-stat-oxypropylene) -block-poly (oxydimethy Isilylene) block poly (oxyethylene-stat-oxypropylene) exist.

Furthermore, the above-mentioned surface substance 46 can be made from polyimines, in particular from

Poly ((benzoylimino) ethylene) or Po Ly ((but r L i mi no) et hy Len) or Poly ((dodecanoylimino) ethylene) or r

Poly ((dodecanoylimino) ethylene-stat- (acetylimino) trimethyl hy) or poly ((heptanoylimino) ethylene) or poly ((hexanoylimino) ethylene) or poly (((3-methyl) butyrylimino) ethylene) or poly (( pentadecaf luorooctadecanoylimino) ethylene) or poly ((pentanoylimino) ethylene).

Furthermore, the above-mentioned coating substance 46 can be made of polyurethanes, in particular of polyurethane

Poly (methylene diphenyl diisocyanate-alt- (butanediol poly (oxytetra ethylene) dioL) or poly (hexamet hy Len di i socyana ta l tt ri et hy Len g Lyco L) or Po Ly (4-met hy 1-1, 3- pheny Len di isocyanate-old-tripropylene glycol) exist.

Substance 46 can also be derived from Po Ly si Loxanen, i nsspecial re out

Po l (oxydi ehy Ls i ly Len), Alpha, Omega-di f unc i ona L

R- (Si (CH) -0-) -SUCH) -R

3 2 n 3 2 or poly (oxydi met hy L s i ly Len) block copolymers exist.

Likewise, the substance 46 can be made from hydrolysed and condensed organosilanes, in particular from

3- (1,1-Dihydroperfluorooctoxy) propyltriethoxysilane, CF.

(CF) CH 0 (CH) Si (OC H)

2 6 2 2 3 2 5 3 or gamma-perfluoroisopropoxypropyltri ethoxysi Lan,

(CF) CF0 (CH) Si (0CH)

3 2 2 3 3 3 exist.

Finally, it is also possible to use the aforementioned polymers individually or in a mixture of two or more polymers as substance 46.

A coating with the substances 46 takes place in a thickness that is between 0.5 and 10 μm. This substance 46 prevents ink 22 from adhering to coated parts, e.g. B. inside the ink fountain 1. Especially when using waterless printing inks of high viscosity, eg. B. greater than 9000mPa * s or with so-called UV printing inks, a coating with the substances 46 can be used with advantage, because then "rotating D ruc ka rbenro L len" 24 can form, through a better coloring of the company rbdos ie rwa Lze 4 is reached. The "ink roller" 24 forms near the work its rake Lb lat tes 12 and the immediately adjacent side wall 6 with little friction.

As already mentioned, a large part or all of the parts of the ink fountain 1 which come into direct contact with the printing ink 22 are coated with the substance 46.

It is of course also possible to use the doctor blades 11; 12 at the same angle of inclination to the fa rbdos i e rwa Lze 4.

One of the side walls 7; 6 is preferably angled in such a way that an opening angle gamma of approximately 90 ° formed between the upper partial side wall 30 and the lower partial side wall 35 opens towards the interior of the ink fountain 1. A width d of the upper partial side wall 30 can be equal to a width e of the lower partial side wall 35. However, d can also be greater than e or vice versa. 45 is a longitudinal axis of the ink fountain 1 and 48 is a vertical axis of the ink fountain 1.

The ink fountain 1 is preferably - based on a right-angled coordinate system with the origin on the axis of rotation 5 of the coloration 4 rwa - from its work lying in the 1st or 2nd quadrant or in the 1st and 2nd quadrant, its work its lung A. - based on the location of the Doctor blades 11 on the Fa rbdos ie rwa Lze 4 - in one in the 1st and 4th quadrants or in the 2nd and 3rd Quadrant lying Ent Lee rste Lung pivoted (position of the doctor blades 11, 12). The ink fountain 1 is thus pivoted from a position in which the transverse axis 40 of the ink fountain 1 runs horizontally or approximately horizontally so that after pivoting the transverse axis 40 of the ink fountain 1 runs vertically or approximately vertically.

Furthermore, it is possible to paint box 1 above, d. h to form closed on its upper edge 10.

Reference list

1 color box

2 lateral surfaces (4)

3 cells (4)

4 Fa rbdos i e rwa Lze

5 axis of rotation

6 side wall, left (1)

7 side wall, right (1)

8 Ra ke lmontagef pool (6)

9 rake assembly pool (7)

10 edge, upper (15; 17)

11 closing doctor blade (1)

12 working squeegee blade (1)

13 terminal strip (12)

14 clamping bar (11)

15 front wall, front

16 tangent (2)

17 end wall, rear (6; 7)

18 page (17)

19 outer surface (12)

20 traverse

21 inner surface (12)

22 printing inks

23 scrape pool (12)

24 paint roller (22)

25 inner surface (11)

26 swivel arm (1)

27 swivel arm (1) 8 end, first (26) 9 end, first (27) 0 partial side wall, upper (7) 1 end, second (26) 2 end, second (27) 3 layer of sleeve 4 layer of sleeve 5 partial side wall, lower (7) 6 Roll position 7 Rolling bearings 8 Axle journal 9 Axle journal 0 Que rachse (1)

41 stop

42 See rob

43 stop

44 R i nne

45 longitudinal axis (1)

46 substance

47 area

48 vertical axis

A workst a lung (1)

B Ent empty position (1)

C Product Direction (4)

d width (30) e width (35) Alpha angle of attack (12) Beta swivel angle L (1) Gamma opening angle (30; 35)

Claims

Expectations

1. Color box with color rdos ie re Le enten (11; 12), characterized in that all or only selected areas (6; 7; 15; 17; 19; 21; 25 or 21; 25) with an upper surface area rg i poor substance (46) are coated.

2. Ink fountain according to claim 1, characterized in that the above rf Lächenene rg i e-a poor substance (46)

The upper surface has between 10 and 60 mN / m.

3. Ink fountain according to claim 1, characterized in that at least the inner surfaces (21; 25) of the

Fa rbdos i e re elemente (11; 12) with the substance (46) are coated.

4. Ink fountain according to claims 1 to 3, characterized in that the substance (46) consists of a polymer.

5. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of Ko lenwasserstoff-polymers.

6. Ink fountain according to claims 2 and 4, characterized in that the substance (46)

Styro l-Po Lyme ren exists.

Ink fountain according to claims 2 and 4, characterized characterized in that the substance (46) consists of halogenated hydrocarbon polymers.

8. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of Vi ny Lpo Lyme ren.

9. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of fluorinated Ac ry lpo Ly eren.

10. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of not for Luo r i e rten Met hac ry l-Po Lyme ren.

11. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of fluorinated Met hac ry lpo lyme ren.

12. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of polyether copolymer.

13. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of polyimines.

14. Ink fountain according to claims 2 and 4, characterized in that the substance (46) made of polyurethanes consists .

15. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of Po Lys i Loxanen.

16. Ink fountain according to claims 2 and 4, characterized in that the substance (46) consists of hydro Lys i e rten and condensed Organos i Lanen.

17. Ink fountain according to claims 2 and 4, characterized in that the substance (46)

Po lytet raf Luorethy Len (PTFE).

18. Ink fountain according to claims 4 to 17, characterized in that the substance (46) consists of a polymer or a mixture of two or more polymers.

19. Ink fountain according to claims 1 to 2, characterized in that all inner surfaces (6; 7; 15; 17; 21; 25) are coated with the substance (46).

20. Ink fountain according to claims 1 to 3 and 19, characterized in that the substance (46) consists of metal-free amorphous Koh Lenstoff f sc hic hten (DLC layers) with highly cross-linked Koh Lens tof fnetzwe rken, to which hydrogen is attached.

21. Ink fountain according to claim 20, characterized in that the DLC layers with fluorine (F-DLC) modified s i nd.

22. Ink fountain according to claim 20, characterized in that the DLC layers are modified with silicon (Si-DLC).

23. Ink fountain according to claim 20, characterized in that the DLC layers are modified with boron (B-DLC).

24. Ink fountain according to claim 20, characterized in that the DLC layers are modified with nitrogen (N-DLC).

25. Ink fountain according to claim 20, characterized in that the DLC layers with oxygen (0-DLC) are modified.

26. Ink fountain according to claim 1 to 25, characterized in that the substance (46) is applied with a layer thickness of 0.5 to 10 microns.

27. Ink fountain according to claims 1 to 26, characterized in that an Ars tsrake Iblatt (12) and a closing doctor blade (11) is used as Fa rbdos ie re Lemente.

28. Ink fountain according to claims 1 to 26, characterized in that an adjustable ink knife is used as Fa rbdos i e re element.

29. Ink fountain according to claims 1 and 2, 27 and 28, characterized in that an outer surface (19) of the

Colored elements (11; 12) are coated with substance (46).