EP1348552A1 - Insert in an ink fountain of a printing press - Google Patents

Abstract

The ink box of the roller-type printing press (10) has an outer container with a floor and side walls forming a cavity, and an aperture with the edges of the side walls round it. These edges run all the way round the aperture, thus forming the edges of the aperture too. The ink box contains at least one ink-receiving insert.

Description

The invention relates to an ink fountain for a printing press, according to the preamble of claim 1. The invention further relates to a printing press with an ink fountain according to the preamble of claim 9 and a method for replacing Color according to the preamble of claim 10.

Known printing machines, in particular web printing machines, have at least a color box. The ink fountain comes with one required for printing Color, especially printing ink, filled. To supply the printing press with An ink roller assigned to each ink fountain is used to ensure ink partial immersion in the paint box on the surface with the respective color wetted. The color taken from the paint box in this way is passed on to other organs Passed printing press.

Filling another color when changing colors or due to maintenance Working, are in known embodiments of ink fountains for printing presses very complex because the ink fountain has to be cleaned thoroughly beforehand. The Cleaning is further complicated by the fact that the colors are chemically aggressive and stick firmly to the inside surface of the ink fountain.

Starting from the foregoing, the invention is based on the object Ink fountain for a printing press, preferably several such ink fountains having printing machine and a process to make it quick and easy Color changes are possible without time-consuming cleaning.

A color box for solving this problem has the features of claim 1. The fact that in the outer container of the ink fountain at least one insert for Arranging color is a quick and easy cleaning of the Color box guaranteed. Ideally, there is no need to clean the ink fountain. In addition, the use of the ink fountain results in greatly reduced Changeover times of the printing press and a lower environmental impact because none Cleaning rags, cleaning agents or solvents etc. for cleaning the ink fountain must be used, which brings a cost saving. When cleaning or a required color change is simply the use of the paint box removed and sent to the recycling cycle. Before refilling the ink fountain of the printing press is simply a new use in the outer Container of the color box inserted. Then use the color box with Fill color. The color can also be filled in during use, though this is inserted into the (outer) container of the ink fountain.

The ink fountain is preferably designed such that it conforms to the contour of the Interior of the outer container is substantially adapted and more preferred Way the outer contour of the insert corresponds to the interior of the container. This ensures that the volume of the ink fountain through use the use is not significantly reduced. Furthermore, this is constructive Design ensures that the use of attachments related with the ink fountain is not affected by the use of the insert.

According to a further advantageous embodiment of the ink fountain, the insert has one Floor, and side walls extending from the floor to form an interior, and an opening that is surrounded by upper edges of the side walls, preferably over the entire surface on, wherein the upper edges preferably a peripheral edge of the opening of the Form a stake. The side walls can be slightly conical in such a way that they are for slightly diverge at the top. This allows (empty) inserts to save space are stacked one inside the other. The circumferential edge of the insert has at least an outwardly projecting, preferably circumferential collar, preferably one Flanging on, whereby the edge of the outer container at least in sections covered, preferably encompassed. The collar or the flange serve for one of the mechanical stabilization of the insert so that the insert simply looks out the outer container can be removed. On the other hand, prevent Collar or crimp that color uncontrollably in the space between the insert and the outer container of the ink fountain. Through the preferably the full-area opening of the insert is finally the or the refilling of color by the user in the provided with the insert Ink box relieved.

According to a further embodiment of the ink fountain, the insert is designed such that that the bottom of the insert is preferably all over the bottom of the outer Container rests, the collar or the flanging of the insert is not on the Rest the edge of the outer container. Due to this constructive design ensures that the use of the ink fountain is roughly on the floor supports the outer container of the ink fountain, so that the insert itself does not must have significant load-bearing properties. This is done by preferably made of stainless steel outer container of the ink fountain. Therefore, for the design of the insert selected a material with a relatively small wall thickness become. Furthermore, the user can clean the edge or the flange during cleaning of the insert easier to grasp and remove from the outer container.

According to a further embodiment of the ink fountain, the outer container and / or the insert fasteners for attaching the insert in the outer container. This will result in an unwanted lifting of the insert during the operation of the Avoided printing press.

Another advantageous embodiment of the ink fountain is characterized in that use preferably in the area of the floor and / or the side walls Has reinforcing elements. With this configuration, the onset and the Continue removing the insert from the outer container of the ink fountain facilitated.

According to a further advantageous embodiment of the ink fountain, this is made of one Plastic material formed with a low material thickness. Through the plastic material is a high resistance of the ink fountain according to the invention chemically aggressive colors guaranteed in printing technology. By preferred low material thickness of the ink fountain is also a good adaptability of the Use on the contour of the outer container of the ink fountain and a minimization the amount of waste to be disposed of.

According to a further embodiment of the ink fountain according to the invention, the use is preferably as a deep-drawn, tub-like molded body made of plastic material educated. This configuration makes it simple, quick and inexpensive Production of the ink fountain possible in large numbers.

Further subclaims relate to advantageous developments of the ink fountain.

A printing press for solving the problem mentioned in the introduction has the Features of claim 9. The fact that the color box after at least one of claims 1 to 8 is fast and therefore cost-saving Cleaning of the printing press equipped with the ink fountain according to the invention, for example in the case of a color change, for maintenance work, but if necessary also guaranteed for refilling new paint.

A method for solving the problem mentioned at the outset shows the measures of Claim 10 on. Because according to the invention the color, in particular printing ink, arranged together with an insert in the color box or initially the empty one Inserted in the paint box and then filled with paint, comes the Ink fountain itself not in contact with the paint. The color box remains in the Essentially clean so that the color can be changed with the insert. The Changing color can be for the purpose of changing color for another done, but also for refilling new paint, with a paint residue with the insert is to be replaced. The empty insert is preferably inserted into the ink fountain or inserted and then filled the respective color into the insert.

If a different color is to be assigned to the respective color box, the insert is used together with the previous color, especially a paint residue, from the color box removed. There will then be another use in the paint box inserted, either an empty insert or one already filled with paint Commitment. If an empty insert is placed in the ink fountain, this is done subsequently Fill the insert with paint.

It is also intended to use the remaining color with an insert from the paint box removed to dry or harden before disposal. The facilitates the disposal of ink fountains because no liquid ink escapes can. Rather, the dried or hardened paint forms together with the Use a fixed unit that can be disposed of as a whole. Colors by Curing radiation of ultraviolet light are combined with use in one Drying cabinet given in which the remaining color with ultraviolet light irradiated and dried. After that, the inserts can be used cured residual paint is environmentally friendly fed to a thermal recycling become. As a result of the curing of the paint in use, several uses can be made Residual colors are stacked for disposal.

Fig. 1:

Eine schematische Seitenansicht einer Rollendruckmaschine mit Farbkästen,

Fig. 2:

eine vergrößerte Darstellung eines Teils der Rollendruckmaschine mit Farbkasten gemäß der Fig. 1 in einer perspektivischen Ansicht mit herausgezogenem Farbkasten ohne Einsatz,

Fig. 3:

eine vergrößerte Ansicht des Farbkastens mit einem strichliniert angedeuteten Einsatz, und

Fig. 4:

ein Querschnitt durch äußeren Behälter des Farbkastens mit Einsatz gemäß der Fig. 3.

A preferred embodiment of the ink fountain according to the invention is described below with reference to the drawing. The drawing shows:

Fig. 1:

A schematic side view of a web printing machine with ink fountains,

Fig. 2:

2 shows an enlarged illustration of a part of the web printing press with ink fountain according to FIG. 1 in a perspective view with the ink fountain pulled out without insert,

Fig. 3:

an enlarged view of the color box with a dashed insert, and

Fig. 4:

3 shows a cross section through the outer container of the ink fountain with the insert according to FIG. 3.

1 shows a known printing press 10 in a side view. The printing press 10 is essentially composed of one feed unit 11, several of the same assembled printing units 12 and an output unit 13. Every printing unit 12 has one, not shown in FIG. 1 for the sake of clarity, Color box 14 on.

Fig. 2 shows an example of a printing unit 12, in which an ink fountain 14 in the direction of arrow 15 can be inserted. For the sake of clarity, the is in Ink box 14 arranged insert is not shown in FIG. 2. The ink fountain 14 is among other things from an outer container 16 with a bottom 17 and from that Bottom 17 outgoing side walls 18 formed. The top edges 19 of the Side walls 18 form a peripheral edge 20 which has an opening 21 of the outer Container 16 limited. Preferably the outer container 16 is the ink fountain 14, as shown by way of example in FIG. 2, is essentially cuboid, the full-area opening 21 facing upwards. Deviating from the shown However, other geometries of the outer container 16 are also exemplary embodiments, for example semi-cylindrical, conceivable. The peripheral edge 20 can, as shown in FIG. 2 can be seen, in some areas have depressions or recesses in order to for example space for organs for storing an ink roller etc. or others To create additional facilities.

3 shows the ink fountain 14 according to the invention with one arranged therein Insert 22 for receiving the color for the printing press 10 in an enlarged view. The insert 22 can be inserted into the outer container 16 and after use can be easily removed again. After complete drying, any Color residues can be disposed of properly and the recycling cycle are fed. Time-consuming cleaning of the ink fountain 14 is eliminated. Farther environmental resources are conserved because there are no cleaning rags, cleaning agents, Solvents etc. are required for cleaning.

The insert 22 has a base 23 and side walls 24 extending from the base 23 to form an interior 25. Deviating from the representations in FIG. 3 and 4, insert 22 may have slightly sloping side walls 24 that proceed slightly diverging from the bottom 23. The upper edges 26 of the Insert 22 form a peripheral edge 27 around a preferably full surface formed opening 28 of the insert 22. The edge 27 preferably has a circumferential collar 29. The collar 29 can be in sections or continuously on Edge 27 may be arranged. The collar 29 of the edge 27 stabilizes the one Insert 22 mechanically and on the other hand facilitates the removal of insert 22 from the outer container 16. Furthermore, the collar 29 prevents color between the insert 22 and the outer container 16 can reach. 3, the insert 22 corresponds to the interior of the outer container 16 formed such that the insert 22 with small gaps in the contour of the The interior of the outer container 16 follows or also partially on the inside of the ink fountain 14 is applied. As a result, the insert 22 reduces that for the color in the ink fountain 14 Hardly any available volume. In addition, the insert 22 due to the almost full-surface plant on the bottom 17 of the outer container 16 and thereby conditional support to have only a small material thickness, which the Amount of waste is further reduced.

4 shows a cross section through the ink fountain 14 according to the invention Edge 27 with the collar 29 does not rest on the edge 20 of the outer container 16, but runs approximately parallel to it at a distance. In this case the floor lies 23 of the insert 22 preferably over the entire surface on the bottom 17 of the container 16. By means of this configuration, the gripping of the insert 22 when it is removed the same from the outer insert 16 further facilitated. The collar 29 of the edge 27 of the insert 22 can alternatively also cover the entire surface or in sections Rest edge 20 of outer container 16, with bottom 23 of insert 22 can be designed such that the bottom 17 of the outer container 16 is not or only touched in certain areas. In this embodiment, insert 22 is shown in FIGS outer container "hooked". At the same time, the edge 27 of the insert 22 mechanically better supported because this at least in sections on the edge 20 of the outer container 16 rests.

The collar 29 of the peripheral edge 27 of the insert 22 can also be such that the edge 20 of the outer container 16, as in FIG. 4 shown, embraces. For this purpose, the collar 29 has an approximately U-shaped cross section, which is open at the bottom. The collar 29 thereby forms a kind of edging of the edge 20 of the container 16. This increases the mechanical stability of the edge 27 increased, a tight fit of the insert 22 in the outer container 16 is ensured and at the same time improves the removability of the insert 22. Can continue additional reinforcing elements in the area of the bottom 23 and / or the side walls 24 of the insert 22, such as beads or stampings, etc., are provided become. Such reinforcement elements are shown in FIG. 4 for the sake of clarity not shown in detail. It is also possible, not shown in FIG. 4, additional fastening means, for example in the area of the peripheral edge 27 the insert 22 and the rim 20 of the outer container 16 to provide a unwanted lifting of the insert 22 in the outer container 16 during operation of the To avoid printing machine 10.

3 shows approximately semicircular recesses in opposite (narrow) Side walls 18 of the ink fountain 14. The recesses extend from the upper edge 20 of the color box 14. The insert 22 corresponds to the recesses in the Color box 14 formed. As a result, opposite narrow side walls 24 of the insert 22 also have corresponding recesses which extend from the edge 20 out. The collar 29 of the insert 22, which is designed as a flange, extends preferably also over the course of the recesses, so that the recesses are surrounded by the collar 29 and the edges of the recesses in Ink fountain 14 from the area of the collar 29 assigned to it approximately U-shaped are encompassed, as is the case in the other areas of the collar 29. Consequently In the areas of the recesses, color is reliably avoided the insert 22 can get into the ink fountain 14.

The wall thickness of the insert 22 is up to 1 mm, preferably between 0.3 mm and 0.8 mm. The insert 22 is preferably made by thermoforming a thermoplastic Plastic material made in a known manner. This makes good adaptability of the insert 22 to the contour of the interior of various color boxes 14 from Given printing presses.

The thermoplastic material used for the production of the insert 22 e.g. polyethylene terephthalate (PET), polyvinyl chloride (PVC), polypropylene (PP) as well as polyethylene (PE). Due to the high chemical resistance of this Plastic materials are not required for the manufacture of the outer container 16 the ink fountain 14 of the printing press 10 expensive, corrosion-resistant materials, such as stainless steel, for example, which results in further savings. The insert 22 can also be made of other plastic materials, for example Thermosets, silicones or any mixtures of thermoplastic and / or thermosetting plastic materials are manufactured. Use is also conceivable of fiber-reinforced plastic materials, if necessary, the stability of use 22 to increase.

The method according to the invention proceeds as follows:

Since the paint is in the insert 22, which is arranged in the paint box 14, comes the actual ink fountain 14 does not touch any paint, so it remains clean. colour is only in use 22. Around the ink fountain 14 of the ink, especially printing ink, To be filled, the insert 22 is first placed in the still empty ink fountain 14 used and then filled in the color 22. It is also conceivable, the insert 22 together with the color already filled in the Use ink fountain 14. It can be provided for the opening of the paint to close the filled insert 22, for example by means of a sealing film the insertion of the insert 22 in the ink fountain 14 is removed and the upper full opening of the insert 22 releases.

If, for example, the color is to be removed from the ink fountain 14 in order to change the color, this is done together with the insert 22. The insert 22 thus serves at the same time Disposal of paint.

The paint is dried in the insert 22 before final disposal or hardened. The curing of paint that dries by ultraviolet light takes place by briefly irradiating the paint or the paint residue with ultraviolet Blasting, which can be done in a drying cabinet, for example. after the Paint is dried or cured, it forms a fixed unit with the insert 22, the can be disposed of as a whole.

LIST OF REFERENCE NUMBERS

10

press

11

feeding unit

12

printing units

13

output unit

14

paintbox

15

arrow

16

outer container

17

ground

18

Side wall

19

upper edge

20

edge

21

opening

22

commitment

23

ground

24

Side wall

25

inner space

26

edge

27

edge

28

opening

29

collar

Claims (12)

Ink fountain (14) for a printing press (10), in particular a web printing press, with an outer container (16) which has a bottom (17), side walls (18) extending from the bottom (17) to form an interior space, and one from upper edges (19) of the side walls (18) surrounding opening (21), wherein the upper edges (19) of the side walls (18) form a preferably peripheral edge (20) of the opening (21), characterized in that in the paint box (14) at least one insert (22) is arranged to receive paint. Ink fountain (14) according to claim 1, characterized in that the insert (22) can be inserted into and removed from the outer container (16), in particular the insert (22) is essentially adapted to the contour of the interior of the outer container (16) is, preferably the outer contour of the insert (22) corresponds to the interior of the outer container (16). Ink fountain (14) according to one of the preceding claims, characterized in that the insert (22) has a base (23) and side walls (24) extending from the base (23) to form an interior (25), and one from upper edges (26 ) of the side walls (18) surrounded, preferably full-area opening (28), the upper edges (26) forming a preferably peripheral edge (27) of the opening (28) of the insert (22). Ink fountain (14) according to one of the preceding claims, characterized in that the edge (27) of the insert (22) has a circumferential collar (29) or a flange, which is preferably designed to project outwards, in such a way that the collar (29 ) or the flanging covers the edge (20) of the outer container (16) at least in sections. Ink fountain (14) according to one of the preceding claims, characterized in that the bottom (23) of the insert (22) preferably lies over the entire surface on the bottom (17) of the outer container (16), the collar (29) or the flanging of the Insert (22) preferably does not rest on the edge (20) of the outer container (16). Ink fountain (14) according to one of the preceding claims, characterized in that the outer container (16) and / or the insert (22) have fastening means for fastening the insert (22) in the outer container (16). Ink fountain (14) according to one of the preceding claims, characterized in that the insert (22) is liquid-tight and made of color-resistant material, preferably the insert (22) is formed from a thermoformable plastic material with a low material thickness, the insert (22) in particular after removal from the outer container (16) can be folded. Ink fountain (14) according to one of the preceding claims, characterized in that the insert (22) has reinforcing elements in the region of the base (23) and / or the side walls (24). Printing machine (10), in particular web printing machine, with at least one ink fountain (14), characterized in that the ink fountain (14) is designed according to at least one of Claims 1 to 8. Method for changing the color of a printing press, in particular a web-fed printing press, the respective color accommodated in a color box (14) being removed from the color box (14) and replaced by another color, characterized in that an insert which receives or has the respective color (22) is arranged in the ink fountain (14). A method according to claim 10, characterized in that the color is removed together with the insert (22) from the ink fountain (14) and another insert (22) is inserted into the ink fountain (14) in which the (new) color is already arranged or filled in later. A method according to claim 10 or 11, characterized in that a remainder of the ink removed from the ink fountain (14) with the insert (22) is dried or cured in the insert (22), preferably by air drying or drying with ultraviolet rays.

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