Device for spraying a cleaning fluid in a printing press

Abstract

The invention relates to a device for spraying a cleaning fluid in a printing press, comprising a supply channel (11) and a metering channel (13) which opens into a spraying opening (9). The supply channel (11) opens into a housing (6) and the metering channel (13) is covered by an upper part (7).

Description

Technical Field

[0001] The present invention relates to an apparatus for spraying a cleaning fluid in a printing press, comprising a supply channel and a metering channel, the metering channel being directed into a spray opening. Background Technology

[0002] WO 002001062497 A1 describes a spray bar in which longitudinal channels are milled into a light metal strip. Milling the complex structure of a tree-like piping system is laborious and therefore expensive.

[0003] DE 10 2007 011 042 B4 describes a spray bar in which longitudinal channels of a piping system are introduced into an extruded profile, which may be made of plastic. Summary of the Invention

[0004] The objective of this invention is to provide an additional apparatus for spraying cleaning fluid in a printing press.

[0005] The task is solved by an apparatus for spraying a cleaning fluid in a printing press, the apparatus comprising a supply channel and a metering channel, the metering channel opening into a spray opening, characterized in that the supply channel is introduced into a housing and the metering channel is covered by an upper component.

[0006] The device of the present invention can be manufactured particularly cost-effectively.

[0007] Various expansion options are possible: The metering channel can be introduced into the shell.

[0008] An outlet (spray opening) can also be introduced into the shell.

[0009] The metering channel can be introduced into a metering plate, which is arranged between the shell and the upper component.

[0010] The discharge opening (spray opening) can be introduced into the metering plate.

[0011] The metering channel can be introduced into the upper component, wherein the discharge opening is located in the metering plate.

[0012] Another supply channel can be introduced into the shell and another metering channel can be introduced into the metering plate.

[0013] The metering channel can be connected to the supply channel through a through hole in the metering plate, and the other metering channel can be connected to the other supply channel through another through hole in the metering plate.

[0014] The supply channel and the other supply channel may extend parallel to each other.

[0015] The metering channel may branch off from the supply channel on opposite sides of the supply channel.

[0016] The metering channel can branch off from the supply channel and another supply channel, which is arranged in a row aligned or aligned with the supply channel in the longitudinal direction.

[0017] A row of collection channels can be introduced into the shell, these collection channels being connected to the supply channel via an intermediate channel, and the metering channel can branch off from the collection channels.

[0018] The shell can be made of plastic.

[0019] The shell can be made of metal and, for example, a deep-drawn piece.

[0020] The shell can be an extruded profile, for example, made of plastic or aluminum (aluminum alloy). Attached Figure Description

[0021] Further structurally and functionally advantageous extensions will be derived from the following description of the embodiments and accompanying drawings. In the drawings: Figure 1 A printing press roller with an associated detergent spraying device is shown; Figure 2 The shell-shaped lower part of the spraying device is shown; Figure 3 and Figure 4 This illustrates a simplified structure of a spraying device with only one row of spray nozzles. Figure 5 This illustrates a modified spraying device for zoned spraying. Figure 6 and Figure 7 This illustrates a modified spraying device with a multi-level tree-like channel system. Figure 8 And 9 are shown Figures 3 to 7 One of the multiple arrangements of the spraying device; Figure 10 and Figure 11 This illustrates a design for a spraying device, which has channels for multiple different cleaning fluids within a section of the same plastic housing; Figure 12 and Figure 13 This illustrates a design for a spraying device, featuring channels for multiple different cleaning fluids within a single aluminum housing; and Figure 14 Showing the use of in Figures 1 to 13 The seal used in one of the spraying devices.

[0022] In the appendix Figures 1 to 14 In the drawings, components and elements with the same function are represented by the same reference numerals. Detailed Implementation

[0023] Figure 1 The diagram shows rollers 1 to 3 of the ink mechanism of the offset printing unit of a sheet metal printing press. A metering device 4 sprays cleaning fluid 5 into the ink mechanism. The metering device 4 includes a housing and an upper component 7 serving as a cover. The metering device 4 extends longitudinally parallel to the axis of rotation of the rollers 1 to 3. A conduit 8 is connected to the housing 6, supplying the cleaning fluid 5. One row of spray openings 9 sprays between rollers 1 and 2, and another row of spray openings 10 sprays between rollers 2 and 3. These two rows are introduced into the housing 6.

[0024] Figure 2 The shell 6 without the upper component 7 is shown in top view. A supply channel 11 extends in the middle, through which a pipe 8 leads to a liquid inlet 12. A metering channel 13 (leading to a spray opening 9) branches off from the supply channel 11 to one side and a metering channel 14 (leading to a spray opening 10) to the other side. The metering channels 13 and 14 are arranged evenly in a row, with the two rows staggered from each other by a distance a. This achieves particularly uniform application of the cleaning fluid 5. The shell 6 is made of plastic and can be manufactured by thermoforming (deep drawing) or injection molding. This achieves particularly cost-effective manufacturing. The upper component 7 is a plate and can also be made of plastic or sheet. The supply channel 11 and the metering channels 13 and 14 are grooves introduced into the flat surface 15 of the shell 6. Here, these grooves do not necessarily extend horizontally, but can also have a slope. The surfaces 15 and the upper component 7 are in close contact with each other, thereby preventing the cleaning fluid 5 from overflowing from one metering channel into the other metering channel 13 or 14. For added security, a seal, which will be described later, may also be used. The face 15 may be referred to as a flange.

[0025] Figure 3 and 4 A modification of the metering device 4 is shown, in which the metering channel 14 with the spray opening 10 is eliminated. Figure 3 A side view of the entire device is shown. Figure 4 A perspective view of the shell 6 without the upper component 7 is shown, allowing a better view of the branched fluid channel system. Figure 4 As can be seen, the cross-section of the supply channel 11 is trapezoidal. The sloping downward walls of the supply channel 11 are advantageous in manufacturing technology and allow the shell 5 to be removed from the mold during manufacturing. The spray opening 9 is shaped as a nozzle. A seal 24 is placed between the surface 15 and the surface of the upper component 7 facing that surface. A retaining piece 17 is present at each end of the upper component 7.

[0026] Figure 5 Another modification is shown, in which only the housing 6 is shown and the upper component 7 is configured as already described. In this modification, multiple supply channels 11 are provided. Three exemplary supply channels 11 are connected to the pump 18 via their respective conduits 8, as schematically shown. These supply channels 11 are arranged in a row and can be supplied with cleaning fluid 5 independently of each other. This enables zone-by-zone metering in spraying zones A, B, and C. For example, cleaning fluid (e.g., detergent) can be sprayed onto rollers 1, 2, or 3 only in the outer spraying zones A and C for particularly intensive cleaning of their problematic edge areas. Alternatively, in the case of printing only at partial specifications, spraying can be performed only in spraying zones (e.g., A or B) corresponding to the roller segments involved in printing.

[0027] exist Figure 6 (Top view) and Figure 7 The diagram shows another modification of the casing 6. In this modification, intermediate channels 19 branch off from the supply channel 11, each leading into the collection channel 20, from which metering channels 13 branch off. This tree-like structure of the channel system achieves a particularly uniform distribution of the clean fluid.

[0028] exist Figure 8 The diagram illustrates a stepped arrangement of a group of identical metering devices 4. In the exemplary three metering devices 4, the upper metering device protrudes laterally from the two metering devices 4 below it with its spray opening 9, and the middle metering device 4 protrudes laterally from the metering devices 4 below it with its spray opening 9. This staggered arrangement allows the metering devices 4 to spray alongside each other. The metering devices 4 can optionally introduce various types of cleaning fluids 5 into the ink unit. For example, the first metering device 4 can introduce detergent for conventional offset printing inks, the second metering device 4 can introduce detergent for UV printing inks into the ink unit, and the third metering device 4 can introduce rinsing water for re-cleaning into the ink unit. For the stepped, multiple arrangement, the metering devices 4 in... Figures 3 to 7 The structural form shown is appropriate.

[0029] Figure 9 Previous view shown Figure 8 One of the measuring devices 4 in the picture shows that the measuring device 4 is fixed by its fixing piece 17, for example, screwed onto the retainer 21.

[0030] exist Figure 10 and 11 An embodiment of a metering device is shown, in which the metering device is configured to optionally introduce a plurality of cleaning fluids into the ink mechanism. From Figure 10As can be seen in the side view shown, a measuring plate 22 is placed between the shell 6 and the upper component 7. Figure 11 The top view shown indicates that three supply channels 11a, 11b, and 11c, introduced into the housing 6 by deep drawing or injection molding of plastic, extend parallel to each other in the longitudinal direction. Metering channels 13a, 13b, or 13c branch off from each supply channel 11a, 11b, and 11c at regular intervals, connecting to the supply channels 11a, 11b, or 11c via through holes 23a, 23b, or 23c in the metering plate 22. Metering channels 13a, 13b, and 13c are introduced into the metering plate 22 as grooves and lead into the spray opening 9. In the example shown, they are oriented vertically downwards, but they could also be oriented horizontally forwards or inclined in the spray direction between these two directions. The orientation of the spray opening 9 depends on the position of the metering device 4 relative to the rollers 1 to 3 of the ink mechanism, where the position can vary. Figure 1 The positions are shown in the diagram. Supply channels 11a, 11b, and 11c are closed from above by metering plate 22 placed on the housing 6, and metering channels 13a, 13b, and 13c are closed from above by upper component 7 placed on metering plate 22. Short metering channel 13a, medium metering channel 13b, and long metering channel 13c form a group in the order described above. Other orders are also possible. All metering channels 13a, 13b, and 13c extend parallel to each other in a transverse direction orthogonal to supply channels 11a, 11b, and 11c. The distance between a long metering channel 13a in one group and a short metering channel 13c in the next group can be exactly equal to or (as shown) greater than the distance between metering channels 13a, 13b, and 13c within their respective groups. Liquid inlets 12a, 12b, 12c with supply channels 11a, 11b, 11c connected to pipes 8a, 8b, 8c are arranged at the ends of the rolled edges forming the supply channels 11a, 11b, 11c.

[0031] exist Figure 12 and 13 An embodiment is shown, which differs from the previous one only in two aspects. Figure 10 and 11 The embodiments described in the text differ. On one hand, shell 6 is an extruded profile made of plastic or aluminum, including aluminum alloys. On the other hand, Figure 12 and 13 One difference in the embodiment shown is that, in this embodiment, the metering plate 22 has sidewalls 16 through which end-side clearance supply channels 11a, 11b, 11c are provided.

[0032] Figure 14As shown, a seal 24 can be introduced between the upper component 7 and the metering plate 22, which reliably prevents liquid from overflowing from the respective metering channels 13a, 13b, 13c into adjacent metering channels 13a, 13b, 13c. According to... Figure 10 and 11 In a modification of the device shown, the seal 24 extending parallel to the metering channels 13a, 13b, 13c can be formed by a weld, which is produced by laser or ultrasonic welding of the upper component 7, made of plastic, to the metering plate 22, also made of plastic. Figure 10 and 11 In the variant shown, the seal 24 is formed of a sealing material such as silicone or adhesive, and the seal 24 is arranged in a gap extending between a groove 25 and a piece 26, which mate with each other and extend parallel to the metering channels 13a, 13b, 13c. The respective groove 25 is introduced into the upper component 7, and the respective piece 22 is molded onto the metering plate 22, wherein interchangeable configurations are also possible. In this way, a labyrinth seal with a filled labyrinth can be formed. Figure 14 The sealing measures shown can be used not only in Figures 10 to 13 The embodiments shown employ this approach, and it can also be used in… Figures 1 to 9 The embodiment shown employs a method in which, in the latter case, the sheet 26 or the slot 25 is introduced into the housing 6.

[0033] List of reference numerals 1 roller 2 rollers 3 rollers 4 Metering device 5 Cleaning fluid 6 shells 7. Upper Components Pipelines 8, 8a, 8b, 8c 9 Spray openings 10 Spray openings Supply channels 11, 11a, 11b, 11c 12, 12a, 12b, 12c Liquid inlets Metering channels 13, 13a, 13b, 13c 14 Metering Channels 15 sides 16 walls 17 Fixing plate 18 pumps 19. Middle passage 20 Collection Channels 21 Retaining element 22 Metering Plate Through holes 23a, 23b, 23c 24 Seals 25 slots 26 pieces a distance A Spraying Area B Spraying Area C. Spraying area.

Claims

1. An apparatus for spraying a cleaning fluid in a printing press, comprising a first supply channel (11a) and a first metering channel (13a), the first metering channel opening into a spray opening (9), Its characteristics are, The first supply channel (11a) is introduced into the shell (6); The first metering channel (13a) is covered by the upper component (7); The first metering channel (13a) is introduced into the metering plate (22), which is arranged between the shell (6) and the upper component (7); A second supply channel (11b) is introduced into the shell (6) and a second metering channel (13b) is introduced into the metering plate (22); and The first metering channel (13a) is connected to the first supply channel (11a) through the first through hole (23a) in the metering plate (22), and the second metering channel (13b) is connected to the second supply channel (11b) through the second through hole (23b) in the metering plate (22).

2. The apparatus according to claim 1, characterized in that, The first supply channel (11a) and the second supply channel (11b) extend parallel to each other.

3. The apparatus according to claim 1 or 2, characterized in that, The shell (6) is made of plastic.

4. The apparatus according to claim 1 or 2, characterized in that, The shell (6) is an extruded profile.

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