CN111196086A - Printed sheet powder spreading device - Google Patents
Printed sheet powder spreading device Download PDFInfo
- Publication number
- CN111196086A CN111196086A CN201910762689.4A CN201910762689A CN111196086A CN 111196086 A CN111196086 A CN 111196086A CN 201910762689 A CN201910762689 A CN 201910762689A CN 111196086 A CN111196086 A CN 111196086A
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- CN
- China
- Prior art keywords
- distributor
- line
- nozzle
- outlet
- powder
- 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.)
- Granted
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
Abstract
The invention relates to a device for powdering a printed sheet (1) in a printing press, comprising a nozzle row (2) having an external spray nozzle (3) and an internal spray nozzle (4) in the nozzle row, and further comprising a distributor (5) having a first distributor outlet (6) and a second distributor outlet (7) for a powder air mixture (8), wherein the first distributor outlet (6) is connected to the external spray nozzle (3) via a first line (9), and the second distributor outlet (7) is connected to the internal spray nozzle (4) via a second line (10). The first distributor outlets (6) each have a smaller flow cross section (A6) than the second distributor outlets (7). The outer spray nozzles (3) each have a flow cross section (A34) which is the same size as the inner spray nozzles (4).
Description
Technical Field
The invention relates to a device for powdering printed sheets in a printing press, comprising a nozzle row with an external spray nozzle and an internal spray nozzle in the nozzle row, and a distributor with a first distributor outlet and a second distributor outlet for a powder air mixture, wherein the first distributor outlet is connected to the external spray nozzle via a first line, and the second distributor outlet is connected to the internal spray nozzle via a second line.
Background
The dusting device should be adjustable to the format width of the printed sheets so that in the case of small sheets, the powder does not pass over the sheets, which would lead to waste of powder and machine contamination.
DE 102015222706 a1 describes a device in which a baffle for covering the powder nozzles is arranged at each end of the spray bar, said baffle being outside the width of the sheet format to be processed.
Disclosure of Invention
The object of the invention is to provide a further powdering device for printed sheets.
This object is achieved by a device for powdering printed sheets in a printing press, comprising a nozzle row with an external spray nozzle and an internal spray nozzle in the nozzle row, and further comprising a distributor with a first distributor outlet and a second distributor outlet for a powder air mixture, wherein the first distributor outlet is connected to the external spray nozzle via a first line, and the second distributor outlet is connected to the internal spray nozzle via a second line, characterized in that the first distributor outlets each have a smaller flow cross section than the second distributor outlet and the external spray nozzles each have a flow cross section of the same size as the internal spray nozzle.
One advantage of the device of the invention is that in the device it is possible to make specification adjustments in a fine switching level.
The following further solutions are possible:
a shut-off valve may be arranged only in the first line and not in the second line.
It is possible that only one of the externally positioned spray nozzles is connected to each of the first dispenser outlets and a plurality of the internally positioned spray nozzles are connected to each of the second dispenser outlets.
It may be that only the second line branches into a line fork and the first line does not branch.
The dispenser may be connected to a mixing chamber connected to a source of compressed air and a source of powder.
Further embodiments are also possible from the following description of the examples and the figures.
Drawings
Fig. 1 shows a dusting device in the single figure, which can be adjusted for different sheet formats.
Detailed Description
The figure schematically shows a printed sheet 1, the format width of which can be varied between print jobs, as indicated by four size arrows. The printed sheets 1 are dusted by means of a spray bar 16, which is arranged in the sheet feeder of the printing press.
The spray bar 16 has a nozzle row 2 which, in terms of format width, comprises an outer spray nozzle 3 and an inner spray nozzle 4. Only one end of the nozzle row 2 is shown, on which for example three outer spray nozzles 3 are located. On the other end, there are likewise three outer spray nozzles 3 and between the two sets of end-side outer spray nozzles 3 there is a set of inner spray nozzles 4.
The outer spray nozzles 3 each have the same flow cross section a34 as the inner spray nozzles 4. The flow cross section a34 is the cross section of the nozzle bore of the respective spray nozzle 3, 4.
The spray bar 16 is connected to the distributor 5 for the powder air mixture 8 via a first and a second line 9, 10. The powder air mixture 8 enters the distributor 5 through the distributor inlet 17 and is distributed in the distributor to the first and second distributor outlets 6, 7. Each first distributor outlet 6 is connected via a first line 9 only to one of the externally arranged spray nozzles 3 in order to supply them with the powder air mixture 8.
Each first distributor outlet 6 has a flow cross-section a6 and each second distributor outlet has a flow cross-section a7, wherein a6 < a 7. The powder air mixture 8 flows from the distributor 5 into the spray bar 16 through said flow cross sections a6, a 7.
Each second distributor outlet 7 is connected via a second line 10 to a plurality of built-in spray nozzles 4, in the example shown three built-in spray nozzles 4, in order to supply the built-in spray nozzles 4 with a powder air mixture 8. For this purpose, the respective second line 10 ends in a line fork 12. The respective line fork 12 has a plurality of fork branches (here three), each branch leading to a further built-in injection nozzle 4.
No shut-off valve is provided in the second line 10. The first line 9 has no line fork. However, a shut-off valve 11 is provided in each case in the first line 9.
By closing all shut-off valves 11, all externally arranged spray nozzles 3 are deactivated and the spray bars 16 are adjusted to the minimum format of the printed sheet 1.
All the externally arranged spray nozzles 3 are supplied with the powder air mixture 8 and are thus activated by opening all the shut-off valves 11. If all the shut-off valves 11 are open, the spray bar 16 is adjusted to maximum specification.
To set the intermediate specification, the shut-off valve 11 can be closed in stages: the larger intermediate specification is set by closing only the left-hand shut-off valve 11 in the drawing and the smaller intermediate specification is set by additionally also closing the intermediate shut-off valve 11.
A powder air mixture 8 is produced in the mixing chamber 13 by mixing compressed air from a compressed air source 14 with powder from a powder source 15. The powder source 15 may be a reserve container with a powder meter. The compressed air source 14 may be a compressor or a tap of a central compressed air supply. The mixing chamber 13 is formed by a conduit connecting the powder source 15 to the distributor inlet 17. Into which a further line from a compressed air source 14 opens.
List of reference numerals:
1 printed sheet
2 nozzle row
3 external spray nozzle
4 built-in spray nozzle
5 Dispenser
6 first distributor outlet
7 second distributor outlet
8 powder air mixture
9 first pipeline
10 second pipeline
11 stop valve
12 pipeline fork
13 mixing chamber
14 source of compressed air
15 source of powder
16 spray rod
17 distributor inlet
A6 flow cross section (of each first distributor outlet 6)
A7 flow cross section (of each second distributor outlet 7)
A34 flow cross section (of each outer and inner spray nozzle 3, 4)
Claims (5)
1. A device for powdering a printed sheet (1) in a printing press, comprising:
a nozzle row (2) having an outer spray nozzle (3) and an inner spray nozzle (4) in the nozzle row; and
a distributor (5) having a first distributor outlet (6) and a second distributor outlet (7) for a powder air mixture (8), wherein the first distributor outlet (6) is connected to the external injection nozzle (3) via a first line (9) and the second distributor outlet (7) is connected to the internal injection nozzle (4) via a second line (10),
it is characterized in that the preparation method is characterized in that,
the first distributor outlets (6) each have a smaller flow cross section (A6) than the second distributor outlets (7), and the outer injection nozzles (3) each have a flow cross section (A34) that is the same size as the inner injection nozzles (4).
2. Device according to claim 1, characterized in that a shut-off valve (11) is arranged only in the first line (9) and not in the second line (10).
3. Device according to claim 1 or 2, characterized in that only one of the outer spray nozzles (3) is connected to each of the first distributor outlets (6) and a plurality of the inner spray nozzles (4) is connected to each of the second distributor outlets (7).
4. A device according to any one of claims 1-3, characterised in that only the second line (10) branches into a line fork (12) and the first line (9) does not branch.
5. Device according to any one of claims 1 to 4, characterized in that the dispenser (5) is connected to a mixing chamber (13) which is connected to a source of compressed air (14) and to a source of powder (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018219655.9A DE102018219655B3 (en) | 2018-11-16 | 2018-11-16 | Sheet-pollination device |
| DE102018219655.9 | 2018-11-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111196086A true CN111196086A (en) | 2020-05-26 |
| CN111196086B CN111196086B (en) | 2021-04-09 |
Family
ID=67622977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910762689.4A Active CN111196086B (en) | 2018-11-16 | 2019-08-19 | Printed sheet powder spreading device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111196086B (en) |
| DE (1) | DE102018219655B3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022114498A1 (en) | 2021-09-14 | 2023-03-16 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for dusting printed sheets with powder in a printing press |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775374A (en) * | 2004-11-19 | 2006-05-24 | 魏特曼和康拉德两合公司 | Spray nozzle and method for spraying freshly printed products |
| CN101391514A (en) * | 2007-09-20 | 2009-03-25 | 小森公司 | Powdering device for powdering printed sheet |
| CN201597242U (en) * | 2010-03-28 | 2010-10-06 | 滕兴鸿 | Electronic pneumatic powder spraying device |
| US20140013977A1 (en) * | 2012-07-13 | 2014-01-16 | Heidelberger Druckmaschinen Ag | Powdering device for a printing press and method for operating the powdering device |
| DE102013018825A1 (en) * | 2012-11-28 | 2014-05-28 | Heidelberger Druckmaschinen Ag | Powder device for powdering printed sheets in printing press, has supply line that opens into connecting line for supplying compressed air, where portion of connecting line is arranged as mixing chamber for mixing compressed air with powder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015222706A1 (en) | 2014-12-15 | 2016-06-16 | Heidelberger Druckmaschinen Ag | Process for powdering printed sheets in a printing machine |
| DE102015224490A1 (en) * | 2015-01-22 | 2016-07-28 | Heidelberger Druckmaschinen Ag | Apparatus for powdering printed sheets |
-
2018
- 2018-11-16 DE DE102018219655.9A patent/DE102018219655B3/en active Active
-
2019
- 2019-08-19 CN CN201910762689.4A patent/CN111196086B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775374A (en) * | 2004-11-19 | 2006-05-24 | 魏特曼和康拉德两合公司 | Spray nozzle and method for spraying freshly printed products |
| CN101391514A (en) * | 2007-09-20 | 2009-03-25 | 小森公司 | Powdering device for powdering printed sheet |
| CN201597242U (en) * | 2010-03-28 | 2010-10-06 | 滕兴鸿 | Electronic pneumatic powder spraying device |
| US20140013977A1 (en) * | 2012-07-13 | 2014-01-16 | Heidelberger Druckmaschinen Ag | Powdering device for a printing press and method for operating the powdering device |
| DE102013018825A1 (en) * | 2012-11-28 | 2014-05-28 | Heidelberger Druckmaschinen Ag | Powder device for powdering printed sheets in printing press, has supply line that opens into connecting line for supplying compressed air, where portion of connecting line is arranged as mixing chamber for mixing compressed air with powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111196086B (en) | 2021-04-09 |
| DE102018219655B3 (en) | 2019-09-05 |
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