CN111137011A - Machine for producing printed products - Google Patents
Machine for producing printed products Download PDFInfo
- Publication number
- CN111137011A CN111137011A CN201911069394.5A CN201911069394A CN111137011A CN 111137011 A CN111137011 A CN 111137011A CN 201911069394 A CN201911069394 A CN 201911069394A CN 111137011 A CN111137011 A CN 111137011A
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- CN
- China
- Prior art keywords
- machine
- blowing
- blowing device
- preparation
- printing
- 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.)
- Pending
Links
- 238000007664 blowing Methods 0.000 claims abstract description 97
- 238000007639 printing Methods 0.000 claims abstract description 47
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims 11
- 239000000976 ink Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/22—Means for cooling or heating forme or impression cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0476—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ink Jet (AREA)
Abstract
The invention relates to a machine for producing printed products, comprising a printing device (3) for printing a printing material (2), a dryer (4) for drying the printed printing material, a conveying device (5) for conveying the printing material, and a blowing device (6) for cooling the conveying device, characterized in that the blowing device is designed as an impact beam blowing device (6). By means of the invention, sufficient cooling for undisturbed printing can be achieved in an advantageous manner and costs can be avoided or reduced.
Description
Technical Field
The invention relates to a machine for producing printed products having the features of claim 1.
The technical field to which the invention pertains is the graphics industry and in this context, in particular, the field of industrial, i.e. high-throughput, ink-jet printing on flat substrates, i.e. the application and (hot) drying of liquid, preferably water-based, inks on sheet-like or web-like printing materials, preferably made of paper, cardboard, kraft paper, plastics or composite materials.
Background
In the known DOD (drop on demand) ink printing method, the application of liquid ink is effected by producing a printed image on a flat printing substrate, wherein an ink printing head (print head) produces extremely fine ink drops, preferably in the range of picoliters, from the image to be printed by means of individually controllable nozzles and transfers these ink drops in a contactless manner as printing dots onto the printing substrate. The nozzle can be actuated by means of a piezo actuator.
The thermal drying of water-based inks on moving printing material (i.e. in particular the evaporation of water required for this purpose) requires a dryer, which evaporates off all excess water during the short residence time of the printing material in the operating range of the dryer, to generate a high degree of spatial power density. Thus, there is a large amount of energy input to the machine in the range of the dryer. This may lead to undesired thermal expansion of machine parts, such as side walls or rollers. Such thermal expansion may have an interfering effect on the printing process.
Ink printing processes using water-based inks (water as the ink solvent) require that the printing process be carried out at a substantially constant temperature. Thus, the heat input of current dryers to the printing press may easily cause appreciable disturbances to the printing process.
DE 202018000418U 1 has already disclosed the cooling of a sheet cylinder in an ink jet printer. In this case, a blowing device is arranged below the drum guiding the sheet, which blowing device simultaneously adjusts the temperature of the drum and of a drum arranged upstream of the drum (or of the sheet guided by the drum).
A similar device is disclosed in DE 112015004269T 5. DE 10334657 a1 likewise discloses a similar device, but not in an inkjet printer.
FR 2734758 discloses a cooling device for cooling a drum, wherein the device is adapted in its shape to the cylindrical surface to be cooled.
Such cooling devices often do not achieve the required cooling power, in particular in the case of high heat input caused by a thermal dryer adjacent to the printing unit. Generally, this problem is solved by increasing the volume flow and/or the cooling power. However, both measures also increase the costs due to the provision of more blowers and more heat exchangers. The market is therefore constantly demanding more measures for achieving a better and cost-effective cooling.
EP 0658427B 1 does not show a device for cooling, but a thermal dryer; the thermal dryer is designed according to the so-called impact beam principle (pralstahl-Prinzip).
Disclosure of Invention
The object of the present invention is therefore to provide an apparatus which is improved over the prior art and which in particular makes it possible to achieve sufficient cooling for an undisturbed printing process and thereby to reduce or save costs.
This object is achieved according to the invention by a device having the combination of features of claim 1. Advantageous and therefore preferred developments of the invention emerge from the dependent claims as well as from the description and the drawings. The combination of the features of the invention, the improvements of the invention and the embodiments of the invention also constitutes advantageous improvements of the invention.
The machine for making printed products according to the invention has: printing units for printing substrates, in particular ink printing units (inkjet); a dryer, in particular a thermal dryer, for drying the printed printing material; a conveying device, in particular a roller, for conveying the printing material; a blowing device for cooling the conveying device; the machine is characterized in that the blowing device is designed as an impact beam blowing device (Pralstrahl-Blaseinrichtung).
The invention advantageously enables sufficient cooling for an undisturbed printing process and thereby reduces or saves costs.
According to the bookThe invention relates to an impact beam blowing device, by means of which so-called near-field cooling (NaHfeld-K ü hlung) can be achieved, which cooling can achieve up to five times improved cooling power compared to blowing devices with open blowing boxes, in the case of cooling a conveyor device using the so-called impact beam principle, the conveyor device is loaded with a high velocity (for example 50m/s to 90m/s) and at the same time a low volume flow (for example 300 m/s)3H to 3000m3H) blowing air. Such an impact beam blowing device is preferably arranged in the vicinity of the conveyor device to be cooled (for example with a spacing of 3mm to 30 mm). The air discharge from the impact beam blowing device is preferably effected via a plurality of small openings or nozzles, rather than via the only large opening of the blowing device, for example with a diameter of 0.5mm to 5 mm.
The invention thus provides the following advantages: a small blowing air volume flow is sufficient to achieve sufficient cooling. Thereby, the blowing device can be attached to an already existing blowing air supply device of the machine. In this way, cost savings can be achieved by saving more blowers and/or more heat exchangers.
Preferred developments of the invention can be characterized by one or more of the following combinations of features:
the machine may comprise a further blowing device for cooling the printing device and/or the transport device.
The machine may comprise a supply device which supplies cooled blowing air both to the blowing device and to the further blowing device.
The volume flow supplied by the supply device to the blowing device can be smaller than the volume flow supplied to the further blowing device.
The volume flow supplied to the blowing device can be less than 3000m3H is less than 1500m3H is less than 500m3/h。
The supply means may comprise a heat exchanger and a blower.
The supply line leading from the supply device to the blowing device may comprise a valve and a further blower.
-the blowing device may comprise a cooling cartridge (K ü hlkasten).
The surface of the cooling box, which may face the conveying device, has a plurality of air outlet openings, each having a diameter of less than 5mm, less than 4mm or less than 3 mm.
These multiple air outlet openings can form an air outlet opening area which has at least 2.5 to 30 air outlet openings per 100mm parallel to the conveying device and at least 2.5 to 30 air outlet openings per 100mm perpendicular to the conveying device.
The machine may comprise a control device which controls the blowing air supply to the blowing device and to the further blowing device in such a way that the blowing device and/or the further blowing device is/are supplied with blowing air depending on the operating state of the machine.
The dryer may be a thermal dryer, a hot air dryer and/or an infrared dryer. Alternatively, the dryer may also be a UV dryer.
The conveying device may be a conveying drum, a conveyor belt or at least one conveying tray.
The printing device may be an ink printing device comprising at least one ink printing head.
Drawings
The invention and its preferred developments are described further below on the basis of at least one preferred embodiment with reference to the drawings, i.e. fig. 1 to 3. Here, mutually corresponding features are denoted by the same reference numerals.
The figures show:
FIG. 1: a preferred embodiment of the machine according to the invention;
FIG. 2: a perspective view of a blowing device according to the invention; and
FIG. 3: cross-section of a blowing device according to the invention.
Detailed Description
Fig. 1 shows a preferred embodiment of a machine 1 according to the invention for producing printed products from a print substrate 2.
An ink printer developed by Heidelberg printing machines, Germany under the name "Primefire" for industrial production for printing paper with water-based inkjet inks. The machine 1 comprises seven successive printing stations which transfer the colours CMYK (cyan, magenta, yellow and black) and OGV (orange, green, violet) onto the paper by means of print heads. The applied ink was dried using an infrared dryer. The machine 1 shown in fig. 1 may be such a machine.
The machine 1 comprises: a printing unit 3 (preferably four or seven printing beams each having a plurality of ink printing heads), a dryer (preferably an infrared dryer (IR) or a hot air dryer (HL) or an IR-HL combination dryer or a UV dryer), a transport unit 5 (preferably a drum or a conveyor belt guiding the sheet), and a blowing unit 6, which blowing unit 6 serves to cool the transport unit 5 to a critical temperature in terms of process technology, preferably within a tolerance of ± 2 °. The blowing device 6 is designed according to the invention as an impact beam blowing device.
The machine 1 further comprises a supply device 7, for example a so-called air conditioning pack, which supply device 7 is connected to the blowing device 6 via a line 8 for cooled blowing air. The supply device 7 is also connected to a further blowing device 10 of the machine 1 via a line 9 for cooled blowing air. The further blowing device 10 is preferably used for cooling the printing device 3 and additionally or alternatively for cooling the conveying device 5.
The supply device 7 comprises a heat exchanger 11 and a blower 12, which blower 12 serves to generate cooled blowing air, and the supply device 7 optionally comprises a filter (not shown) for filtering the blowing air. A further blower 13 may be arranged in the line 8 and a valve 14 (for example a so-called shut-off valve) may be arranged. The blower 13 may be used as a backup blower
To compensate for the flow resistance of the blowing device 6. The rotation direction of the supporting blower is reversedThe reverse (Drehrichtungsumkehr) can preferably also be used to switch off the blowing device 6 in such a way that the air supply is significantly reduced or prevented.
Preferably, at least about one fifth of the blowing air pressure in the supply device 7 is available at the blowing device 6.
Fig. 1 shows a control device 22, which control device 22 actuates the supply device 7 and optionally the further blower 13 and the valve 14. This actuation is preferably performed according to the switching logic given below:
fig. 1 shows an optional air knife 23 between the drum 5 and the dryer 4. The air knife 23 may also be connected to the supply device 7. Such an air knife (Luftschwert) makes it possible to prevent the drum from heating up as a result of the dryer, in particular when the machine is shut down.
The blowing device 6 is shown more clearly in a perspective view in figure 2. The blowing device 6 comprises a so-called near-field cooler 15, which near-field cooler 15 has a cooling box 16, which cooling box 16 serves for blowing out cooled blowing air. The cooling box 16 has a surface 17, which surface 17 has a plurality of openings, such as orifices 18, which function as nozzles 18. The surface 17 may have a curvature that is adapted (drum 5), and is preferably concave. For example, the surface 17 may be configured as a plate (Blech). Such a plate may in particular examples have more than 10 x 30 (i.e. 300) orifices (e.g. 1000 to 2000 orifices). Each orifice may have a diameter of, for example, 1.5mm to 3 mm.
The near-field cooler 15 is arranged with a small spacing 19 (see fig. 3), preferably a spacing of about 10mm, with respect to the surface of the drum 5.
For this purpose, in the preceding examples and in alternative variants, the nozzle diameters, the arrangement of the nozzles (or their spacing relative to one another) and the relationship between the spacing of the nozzles relative to the drum are preferably selected such that the blowing air stream with sufficient cooling effect reaches the surface of the drum.
By means of the nozzles 18 of the blowing device 6, cooled blowing air (supplied through its air inlet 20) is blown onto the surface of the drum 5 at a high output speed of, for example, 15 to 90m/s ("impact beam principle"), whereby the boundary layer on the surface of the drum 5 is effectively broken through and effective cooling of the drum 5 is achieved.
Figure 3 shows a cross-section of the blowing device 6. The concavely curved surface 17 and its small spacing 19 relative to the surface 5a of the drum 5 can be clearly seen. The interior of the blowing device 6 is substantially empty.
The supply device 7 shown in fig. 1 supplies blowing air to both the further blowing device 10 and the blowing device 6. Since the blowing device 6 operates on the principle of an impact beam and thus requires only a small blowing air volume flow, a large blowing air volume flow is preferably supplied to the further blowing device 10 and a small blowing air volume flow is preferably supplied to the blowing device 6. For example at 500m3H to 1000m3The blowing device 6 is supplied with blowing air. For example at 1000m3H to 2000m3The other blowing device 10 is supplied with blowing air. Thus, the blowing device 6 can preferably be attached to an already existing supply device 7 without its supply to another blowing device 10 being fundamentally limited. In this way, costs can be saved. In addition, the construction space can be saved.
Since more blowing air enters the machine 1 "from above" (i.e. from the further blowing device 10) than "from below" (i.e. from the blowing device 6), contaminated air (e.g. from paper dust) is advantageously prevented from reaching the sensitive printing heads of the printing device 3 from below. In this way maintenance costs can be saved.
List of reference numerals
1. machine
2. printing Material
3. printing device
4 dryer
5 conveying device/drum
5a surface
6. blowing device
7. supply device
8 pipeline
9. pipeline
10. another blowing device
11 heat exchanger
12 blower
13. another blower
14. valve
15 near field cooler
16. cooling box
17 surface of
18 air outlet opening/nozzle/orifice
19. interval
20 air inlet
21 air outlet opening area
22. control device
23. air knife
Claims (11)
1. A machine for making printed matter, the machine having:
-a printing device (3) for printing a printing material (2),
a dryer (4) for drying the printed substrate,
-a transport device (5) for transporting the printing material, and
-blowing means (6) for cooling the conveying means,
it is characterized in that the preparation method is characterized in that,
the blowing device is designed as an impact beam blowing device (6).
2. The machine of claim 1, wherein the machine is,
it is characterized in that the preparation method is characterized in that,
the machine (1) comprises a further blowing device (10) for cooling the printing device (3) and/or the conveying device (5).
3. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the machine (1) comprises a supply device (7) which supplies cooled blowing air both to the blowing device (6) and to the further blowing device (10).
4. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the volume flow supplied by the supply device (7) to the blowing device (6) is smaller than the volume flow supplied to the further blowing device (10).
5. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the volume flow supplied to the blowing device (6) is less than 3000m3H is less than 1500m3H is less than 500m3/h。
6. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the supply device (7) comprises a heat exchanger and a blower.
7. The machine of claim 6, wherein the first and second rollers are mounted on a single frame,
it is characterized in that the preparation method is characterized in that,
the supply line (8) from the supply device (7) to the blowing device (6) comprises a valve (14) and a further blower (13).
8. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the blowing device (6) comprises a cooling cartridge (16).
9. The machine of claim 8, wherein the first and second rotating members are,
it is characterized in that the preparation method is characterized in that,
the cooling box (6,16) has a surface (17) facing the transport device (5) with a plurality of air outlet openings (18) each having a diameter of less than 5mm, less than 4mm or less than 3 mm.
10. The machine of claim 9, wherein the first and second rollers are mounted on a single carriage,
it is characterized in that the preparation method is characterized in that,
the plurality of air outlet openings (18) forms an air outlet opening area which has at least 2.5 to 30 air outlet openings per 100mm parallel to the conveying device and at least 2.5 to 30 air outlet openings per 100mm perpendicular to the conveying device.
11. The machine of any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the machine (1) comprises a control device (22) which controls the supply of blowing air to the blowing device (6) and to the further blowing device (10) in such a way that the blowing device (6) and/or the further blowing device (10) is/are supplied with blowing air depending on the operating state of the machine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18204331.5A EP3647056B1 (en) | 2018-11-05 | 2018-11-05 | Machine for the production of printed products |
| EP18204331.5 | 2018-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111137011A true CN111137011A (en) | 2020-05-12 |
Family
ID=64172365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911069394.5A Pending CN111137011A (en) | 2018-11-05 | 2019-11-05 | Machine for producing printed products |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3647056B1 (en) |
| CN (1) | CN111137011A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658427A1 (en) * | 1993-12-16 | 1995-06-21 | U.E. SEBALD DRUCK UND VERLAG GmbH | Curing apparatus |
| FR2734758A1 (en) * | 1995-06-01 | 1996-12-06 | Heidelberg Harris Sa | Heat exchanger for offset printer cylinder |
| CN203427428U (en) * | 2013-07-19 | 2014-02-12 | 西安航天华阳印刷包装设备有限公司 | Wide wallpaper printing and embossing production equipment |
| DE202018000418U1 (en) * | 2018-01-10 | 2018-02-02 | Heidelberger Druckmaschinen Ag | Machine for printing on substrates with ink |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2547902C3 (en) * | 1975-10-25 | 1979-09-13 | Albert-Frankenthal Ag, 6710 Frankenthal | Drying box for printed sheets |
| DE10334657A1 (en) | 2003-07-30 | 2005-02-17 | Koenig & Bauer Ag | Method and device for printing substrate and printing machine cooling |
| DE102006027146B4 (en) * | 2006-06-12 | 2009-06-04 | Koenig & Bauer Aktiengesellschaft | A method for reducing the required cooling capacity in a cooling roll stand of a web-fed rotary printing press and a device in a cooling roll stand with cooling rolls |
| CN107073937B (en) | 2014-09-19 | 2018-06-19 | 富士胶片株式会社 | image forming device |
-
2018
- 2018-11-05 EP EP18204331.5A patent/EP3647056B1/en active Active
-
2019
- 2019-11-05 CN CN201911069394.5A patent/CN111137011A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658427A1 (en) * | 1993-12-16 | 1995-06-21 | U.E. SEBALD DRUCK UND VERLAG GmbH | Curing apparatus |
| FR2734758A1 (en) * | 1995-06-01 | 1996-12-06 | Heidelberg Harris Sa | Heat exchanger for offset printer cylinder |
| CN203427428U (en) * | 2013-07-19 | 2014-02-12 | 西安航天华阳印刷包装设备有限公司 | Wide wallpaper printing and embossing production equipment |
| DE202018000418U1 (en) * | 2018-01-10 | 2018-02-02 | Heidelberger Druckmaschinen Ag | Machine for printing on substrates with ink |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3647056A1 (en) | 2020-05-06 |
| EP3647056B1 (en) | 2020-10-28 |
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Application publication date: 20200512 |