CN112622432A - Method for controlling a powder plant - Google Patents
Method for controlling a powder plant Download PDFInfo
- Publication number
- CN112622432A CN112622432A CN202010781495.1A CN202010781495A CN112622432A CN 112622432 A CN112622432 A CN 112622432A CN 202010781495 A CN202010781495 A CN 202010781495A CN 112622432 A CN112622432 A CN 112622432A
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- China
- Prior art keywords
- powder
- preparation
- computer
- light sources
- group
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- 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.)
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- 239000000843 powder Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003086 colorant Substances 0.000 claims description 5
- 238000004040 coloring Methods 0.000 claims description 5
- 239000002966 varnish Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 16
- 230000007246 mechanism Effects 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
- B41F23/06—Powdering devices, e.g. for preventing set-off
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Ink Jet (AREA)
- Printing Methods (AREA)
Abstract
The invention relates to a method for controlling a powder device in a printing press by means of a computer, wherein for a print job, a powder quantity is set on the powder device according to a stored first characteristic curve and is sprayed by the powder device onto a sheet (3) in a uniformly distributed manner over the printing width. The amount of powder is set in view of the stored color preset data. The computer may derive a first facet coverage (5) and a second facet coverage (6) from the color preset data.
Description
Technical Field
The invention relates to a method for controlling a powder device in a printing press by a computer, wherein, in a print job, a powder quantity is set on the powder device according to a stored first characteristic curve (Kennlinie) and is sprayed by the powder device onto a sheet in a uniformly distributed manner over a printing width.
Background
DE 102006049648 a1 describes a method in which, depending on the respective efficiency of the powder application, a so-called powder characteristic curve, i.e. the quantity of powder introduced into the printing press, is traced.
In practice, there is a problem that: the operator overdetermines the amount of powder based on subjective criteria when manually set.
Disclosure of Invention
The object of the invention is to provide a control method in which the amount of powder used is minimized.
This object is achieved by a method for computer-controlled powder units in a printing press, wherein, for a printing job, a powder quantity is set/adjusted on the powder unit according to a stored first characteristic curve and is sprayed by the powder unit onto a sheet in a uniformly distributed manner over the printing width, characterized in that the powder quantity is set taking into account stored color preset data (Farbvoresenstedlindanten).
An additional advantage is that the method can be performed semi-automatically or fully automatically.
In the method according to the invention, the powder quantity is sprayed onto the sheet in a uniformly distributed manner (i.e. without area differences) over the printing width. If the powder device comprises an array of spray nozzles, all nozzles of the array output the same amount of powder per time unit when applying powder to the sheet.
Drawings
Advantageous developments can be gathered from the following description of exemplary embodiments and the accompanying drawings, which show:
FIG. 1: schematic with method steps;
FIG. 2: a graph with a characteristic curve;
fig. 3 and 4: a modification scheme of the method; and
FIG. 5: printing press for carrying out the method.
Detailed Description
In the computer 19 (fig. 5) of the printing press, the sheet 3 with the first side 1 and the second side 2 is represented in the form of data elements. The represented sheet 3 is divided into virtual zones 4 of equal width, which zones 4 are arranged in an arrangement running along the printing width, as shown in fig. 1.
These zones 4 are defined by the colour zones of the colouring means 13 (fig. 5) of the printing press.
The color preset data already stored in the computer comprise first color preset data for a first side 1 (e.g. the front side) of said sheet 3 and second color preset data for a second side 2 (e.g. the back side) of the same sheet 3.
In a first step, the computer finds a first facet coverage 5 for each zone 4 based on the first color preset data. The computer calculates the first area coverage 5 in that the computer adds all the area coverage of the printing colours to be printed on the first side 1 in the printing assignment and in the individual fields 4.
In a second step, the computer finds a second area coverage 6 for each zone 4 based on the second color preset data. The computer calculates the second area coverage 6 by adding the area coverage of all the printing colors to be printed on the second side 5 in the respective area 4 in the print job.
In a third step, the computer adds the first face coverage 5 and the second face coverage 6 for each zone 4 to a sum.
In a fourth step, the computer finds a maximum sum 7 based on the sum, the maximum sum 7 being 80% in the present example.
Fig. 2 shows a first characteristic curve 8, which first characteristic curve 8 is stored in the computer 19 (for example as a table of values) and gives the powder setting values (ordinate) as a function of the surface coverage (abscissa).
In a fifth step, the computer determines the associated powder setting 9 from the maximum sum 7 on the basis of the first characteristic curve 8.
According to a semi-automatic method variant, the computer displays the powder setting 9 in a sixth step (for example on a display), and the operator sets the amount of powder sprayed onto the sheet 3 by a powder device 14 (fig. 5) according to the powder setting 9.
According to a fully automatic method variant, in a sixth step the powder quantity is automatically set by the computer according to the powder setting 9.
The set amount of powder can be applied to the sheet 3 on one or both sides.
In the case of single-sided application, the entire set amount of powder is sprayed onto only one sheet side, either the first side 1 or the second side 2.
In the case of a double-sided application, a portion of the set amount of powder is sprayed onto the first side 1 and the remainder thereof is sprayed onto the second side 2.
In the printing job, the powder quantity is set on the powder device 14 taking into account at least one further data element, wherein the further data element represents the type of printing color, the sheet stack height H, the paper quality of the sheet 3, the setting of the dryer 15 (Einstellung), or other parameters.
The second characteristic curve together with the first characteristic curve 8 forms a characteristic curve family stored in the computer. The second characteristic curves are not shown together in the diagram of fig. 2. For the print job, the second characteristic curve is switched to the first characteristic curve 8. This can be done manually by an operator on the control console of the printing press in order to select the most suitable characteristic curve for each print job. However, the switching can also be performed automatically by the computer.
Switching from the second characteristic curve to the first characteristic curve 8 (or vice versa) is effected manually or automatically, depending on whether a sheet 3 of coated paper (getstrichheim paper) or a sheet 3 of non-coated paper (non-coated paper) is to be printed in the print job to be carried out, and/or depending on whether a varnish (dispersion paste) is to be printed on the sheet 3 as an overlay in the print job.
FIG. 3 shows an embodiment in which the virtual sheet 3 has a surface coverage/surface coverage value/surface coverage
5%, 25%, 7%, 20% and 3% of zone 4, as exemplarily given in the drawing. The sheet 3 has a first useful part 11 and a second useful part 12 which are intended to be printed next to one another on the sheet 3 in the print job. The computer 19 scans the sheet 3 in steps or in pixels in the scanning directions x and y over the printed image by moving the virtual field 10.
Fig. 4 shows: during scanning, the computer determines the field region with the maximum area coverage, which in the example given is 70%, and can be used to determine the maximum sum 7.
Fig. 5 shows a printing press through which the sheets 3 run in the transport direction T from the feeder 16 to the discharge 17. The printing press comprises a turning device 18 for turning over the sheets 3 and, in the transport direction T, a printing unit K, C, M, Y, S for printing the printing colors key black, cyan, magenta, yellow and spot, respectively, before and after the turning device 18. Each printing mechanism K, C, M, Y, S has a colouring mechanism 13, said colouring mechanism 13 comprising a cartridge having an array of metering elements (such as sliders, eccentrics, levers or bolts) defining colour zones corresponding to these zones 4.
Furthermore, the printing press comprises a varnishing unit L for coating the sheet 3 with a varnish dispersion as a cover layer. In the feeder 16, the sheets 3 form a stack having a sheet stack height H. In the collector 17, the powder device 14 and the dryer 15 are arranged.
The printing press comprises an electronic computer 19, in which computer 19 the first characteristic curve 8 (fig. 2) and the second characteristic curve are stored. The computer 19 comprises a display and a console and is connected to the powder device 14 for controlling the powder device 14. The printing press is used to carry out the variant of the method according to the invention described above with reference to fig. 1 to 4.
List of reference numerals
1 first side
2 second side
3 pages
Zone 4
5 first face coverage
6 second side coverage
7 maximum sum
8 first characteristic curve
9 powder set value
10 field area
11 first useful part
12 second useful part
13 coloring mechanism
14 powder equipment
15 dryer
16 feeder
17 material collector
18 turning device
19 computer
C (for cyan) printing mechanism
H sheet stack height
K (for key color black) printing mechanism
L-shaped oil feeding mechanism
M (for magenta) printing mechanism
S (for spot color) printing mechanism
T direction of conveyance
x scanning direction
y scanning direction
Y (for yellow) printing mechanisms
Claims (16)
1. A method for controlling a powder device (14) in a printing press by means of a computer (19),
wherein, for a print job, a powder quantity is set on the powder device (14) according to the stored first characteristic curve (8) and is sprayed by the powder device (14) onto the sheet (3) in a uniformly distributed manner over the printing width,
it is characterized in that the preparation method is characterized in that,
the amount of powder is set taking into account the stored color preset data.
2. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
the color preset data comprises first color preset data for a first side (1) of the sheet (3) and second color preset data for a second side (2) of the same sheet.
3. The method according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the sheets (3) are divided into virtual zones (4) of the same width, which are arranged in an arrangement running along the printing width.
4. The method of claim 3, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a first step, the computer (19) finds a first facet coverage (5) for each zone (4) based on the first color preset data.
5. The method of claim 4, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in the first step, the computer (19) calculates the first area coverage (5) by adding the area coverage of all the printing colors to be printed on the first side (1) in the respective region (4) in the print job by the computer (19).
6. The method of claim 5, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a second step, the computer (19) finds a second area coverage (6) for each zone (4) based on the second color preset data.
7. The method of claim 6, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in the second step, the computer (19) calculates the second area coverage (6) by adding the area coverage of all the printing colors to be printed on the second side (2) in the respective area (4) in the print job by the computer (19).
8. The method of claim 7, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a third step, the computer (19) adds the first (5) and second (6) face coverage for each zone (4) to a sum.
9. The method of claim 8, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a fourth step, the computer (19) takes a maximum sum based on the sum.
10. The method of claim 9, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a fifth step, the computer (19) determines a powder setpoint value based on the first characteristic curve (8) from the maximum sum.
11. The method of claim 10, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a sixth step, the amount of powder is automatically set according to the powder setting value.
12. The method of claim 10, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
in a sixth step, the computer (19) displays the powder setting value, and the operator sets the powder amount according to the powder setting value.
13. The method according to any one of claims 3 to 12,
it is characterized in that the preparation method is characterized in that,
the zones (4) are defined by the colour zones of a colouring means (13) of the printing press.
14. The method according to any one of claims 1 to 13,
it is characterized in that the preparation method is characterized in that,
setting the powder quantity on the powder device (14) taking into account at least one further data element for the print job,
wherein the further data elements represent a printing color type, a sheet stack height (H), a paper quality, a dryer setting, or other parameters.
15. The method according to any one of claims 1 to 14,
it is characterized in that the preparation method is characterized in that,
the stored characteristic map comprises the first characteristic curve (8) and a second characteristic curve,
wherein the second characteristic curve is switched to the first characteristic curve (8) for the print job.
16. The method of claim 15, wherein the first and second light sources are selected from the group consisting of,
it is characterized in that the preparation method is characterized in that,
switching from the second characteristic curve to the first characteristic curve (8) according to the following:
in the printing task, whether a sheet (3) made of coated paper or a sheet (3) made of non-coated paper is to be printed, and/or
Whether or not a varnish should be printed as a cover layer in the print job.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019214553.1 | 2019-09-24 | ||
| DE102019214553 | 2019-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112622432A true CN112622432A (en) | 2021-04-09 |
Family
ID=74846436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010781495.1A Pending CN112622432A (en) | 2019-09-24 | 2020-08-06 | Method for controlling a powder plant |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112622432A (en) |
| DE (1) | DE102020122097A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000141607A (en) * | 1998-11-13 | 2000-05-23 | Mitsubishi Heavy Ind Ltd | Method and apparatus for controlling printer |
| JP2005007901A (en) * | 2004-10-04 | 2005-01-13 | Mitsubishi Heavy Ind Ltd | Method for controlling printing machine and device using this method |
| US20050199151A1 (en) * | 2004-03-12 | 2005-09-15 | Q. I. Press Controls Holding B.V. | Method and system for monitoring printed material produced by a printing press |
| EP2253472A1 (en) * | 2009-05-18 | 2010-11-24 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for supplying colour to a colour deck of an offset printing press |
| DE102014210110A1 (en) * | 2013-05-30 | 2014-12-04 | Koenig & Bauer Aktiengesellschaft | Feeder for a sheet-fed printing machine and method for operating such an investor |
| CN108146094A (en) * | 2016-12-06 | 2018-06-12 | 海德堡印刷机械股份公司 | For giving the method for printing page sprinkling powder |
-
2020
- 2020-08-06 CN CN202010781495.1A patent/CN112622432A/en active Pending
- 2020-08-25 DE DE102020122097.9A patent/DE102020122097A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000141607A (en) * | 1998-11-13 | 2000-05-23 | Mitsubishi Heavy Ind Ltd | Method and apparatus for controlling printer |
| US20050199151A1 (en) * | 2004-03-12 | 2005-09-15 | Q. I. Press Controls Holding B.V. | Method and system for monitoring printed material produced by a printing press |
| JP2005007901A (en) * | 2004-10-04 | 2005-01-13 | Mitsubishi Heavy Ind Ltd | Method for controlling printing machine and device using this method |
| EP2253472A1 (en) * | 2009-05-18 | 2010-11-24 | Heidelberger Druckmaschinen Aktiengesellschaft | Method for supplying colour to a colour deck of an offset printing press |
| DE102014210110A1 (en) * | 2013-05-30 | 2014-12-04 | Koenig & Bauer Aktiengesellschaft | Feeder for a sheet-fed printing machine and method for operating such an investor |
| CN108146094A (en) * | 2016-12-06 | 2018-06-12 | 海德堡印刷机械股份公司 | For giving the method for printing page sprinkling powder |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020122097A1 (en) | 2021-03-25 |
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