CN115320222A - Doctor blade for gravure printing - Google Patents
Doctor blade for gravure printing Download PDFInfo
- Publication number
- CN115320222A CN115320222A CN202210949021.2A CN202210949021A CN115320222A CN 115320222 A CN115320222 A CN 115320222A CN 202210949021 A CN202210949021 A CN 202210949021A CN 115320222 A CN115320222 A CN 115320222A
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- CN
- China
- Prior art keywords
- ink
- knife
- scraping
- edge part
- blade
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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.)
- Pending
Links
- 238000007646 gravure printing Methods 0.000 title claims abstract description 12
- 238000007790 scraping Methods 0.000 claims abstract description 60
- 238000007639 printing Methods 0.000 claims abstract description 44
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
- B41F9/06—Details
- B41F9/08—Wiping mechanisms
- B41F9/10—Doctors, scrapers, or like devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
Abstract
The invention discloses a scraping knife for gravure printing, which comprises a scraping knife and ink removing knives attached to the bottom of the scraping knife, wherein the number of the ink removing knives is not less than one, the scraping knife and the ink removing knives are assembled in a knife rest, and the edge part of an ink scraping blade of the scraping knife is attached to the surface of a printing plate roller; the edge part of the ink picking knife end side for scraping the ink has a certain distance with the surface of the printing plate roller; and a certain gap is formed between the ink scraping edge part of the ink scraping knife and the ink scraping edge part of the scraping knife so as to generate swing to break away the ink accumulated below the scraping edge part. The ink scraping knife for gravure printing is provided with the scraper combination which is attached and interacted, and the distances between the edge part of the scraper and the printing plate roller are different, so that ink is scraped in a layered mode, and the impact effect of the ink on the scraper is reduced to a certain extent.
Description
Technical Field
The invention relates to the technical field of ink scraping knives, in particular to an ink scraping knife for intaglio printing.
Background
Gravure printing is still the main equipment for packaging printing due to the characteristics of clear layers, high India resistance, thick and solid ink layers and the like. The ink scraper of one of the main devices in gravure printing is used for scraping ink outside a non-image-text area, namely a mesh pit, and transferring the ink in the image-text area, namely the mesh pit, onto a printing stock by the pressure on an impression rubber roll so as to realize the printing of a gravure printing machine.
The existing doctor blade structure is generally in a single doctor blade arrangement, ink on the surface of a printing plate roller has certain viscosity and can be attached to the surface of the printing plate roller, and the ink on the surface can impact the doctor blade when the printing plate roller runs at a high speed, so that the doctor blade is lifted to be bent, the scraping effect is further influenced, and the printing plate surface is pasted.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a doctor blade for gravure printing, which has a doctor blade assembly that is attached to and interacts with each other, and has a doctor blade edge portion that has a different distance from a printing plate roller, so as to scrape ink in layers and reduce the impact of ink on the doctor blade to some extent.
The technical scheme of the invention is as follows:
a scraping knife for gravure printing comprises a scraping knife and an ink picking knife attached to the scraping knife, wherein at least one ink picking knife is arranged, the scraping knife and the ink picking knife are assembled in a knife rest, and the edge part of an ink scraping of the scraping knife is attached to the surface of a printing plate roller; the edge part of the ink picking knife end side for scraping ink has a certain distance with the surface of the printing plate roller, and the distance is increased in a gradient manner so as to scrape partial ink on the surface of the printing plate roller and reduce the ink accumulation thickness when the scraping knife scrapes ink; and a certain gap is formed between the ink scraping edge part of the ink scraping knife and the ink scraping edge part of the upper knife.
Furthermore, an ink scraping edge part is formed on the side of the scraping knife end and is arranged to be attached to the printing plate roller, and an ink picking edge part is formed on the side of the ink picking knife end.
Furthermore, a cutter body b which is thicker than the edge part and protrudes out of the ink-picking edge part is formed at the end side of the ink-picking edge part, and the top of the cutter body b is attached to the bottom of the cutter above the ink-picking edge part.
Further, a blade a is formed to be thick and to protrude from the end of the doctor blade.
Furthermore, the corresponding tool body a and the corresponding tool body b are provided with assembly holes, and the corresponding tool rest is also provided with corresponding through holes for the bolts to penetrate and fix.
Furthermore, a knife pad is arranged in the knife rest.
Furthermore, an elastic piece is arranged between the blade part of the lower cutter and the upper cutter to form buffer protection to the blade part,
furthermore, an assembly groove is formed in the surface corresponding position between the lower cutter blade part and the upper cutter body, and the elastic piece is arranged in the assembly groove.
Further, the edge of the lower cutter is arranged obliquely towards the edge of the upper cutter, so that the stacked ink is better damaged in the vibration process.
Furthermore, knife pads with inclined end surfaces are respectively attached to the upper surface and the lower surface of the knife body b of the ink removing knife.
The invention has the following beneficial effects: the ink removing knife stacked with the scraping knife is arranged, a gap is formed between the knife and the knife, and meanwhile the ink removing knife and the printing plate roller are spaced at a certain distance, so that the ink on the surface of the printing plate roller can be scraped in a grading manner, the ink stacked at the bottom of the knife above is broken through the swing of the edge of the knife, and the impact on the surface of the scraping knife is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a doctor blade for gravure printing according to the present invention;
FIG. 2 is a schematic view of the doctor blade of FIG. 1 engaging the surface of a printing plate roller;
FIG. 3 is a schematic structural view of the ink-picking blade;
FIG. 4 is a schematic structural view of a modification;
fig. 5 is a schematic view of the doctor blade of fig. 4 engaged with a printing plate roll.
In the figure: 1-scraping knife; 11-a scraping blade; 12-blade a;2, picking the ink knife; 21-ink removing blade part; 211-assembly grooves; 22-blade b; 221-assembly holes; 3-a cutter pad; 4-a tool rest; 5-elastic member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1-3, a doctor blade for gravure printing includes a doctor blade 1 and an ink removing blade 2 attached to a lower blade surface of the doctor blade 1, where at least one ink removing blade 2 is provided, in this embodiment, only one ink removing blade is provided, the doctor blade 1 and the ink removing blade 2 are assembled in a blade holder 4, and a blade portion of the doctor blade 1 where ink is scraped is attached to a surface of a printing plate roller; the edge part of the ink picking knife 2 at the end side for scraping the ink has a certain distance (if the ink picking knives are arranged into a plurality of groups, the distance is increased in a gradient way) with the surface (ink) of the printing plate roller so as to scrape partial ink on the surface of the printing plate roller and reduce the ink accumulation thickness when the scraping knife 1 scrapes the ink;
the in-process that the cutter scraped printing ink can produce local printing ink and pile up, can produce the impact to the cutter blade, consequently scrapes off the printing ink of cutting edge 2 and scraping the printing ink of sword 1 and scrape the cutting edge and have certain clearance, produces the swing in order to abolish the accumulational printing ink (tension) in scraping 1 cutting edge below of sword, and the printing ink of being convenient for disperses, reduces its impact to scraping the sword, guarantees scraping effect and the life of scraping sword 1.
Specifically, in this example, the doctor blade 1 is formed with a doctor blade portion 11 on the end side so as to be disposed in contact with the printing plate roller, and the doctor blade 2 is formed with a doctor blade portion 21 on the end side. And a blade b 22 which is thicker than the blade part and protrudes out of the ink-removing blade part 21 is formed at the end side of the ink-removing blade part 21, and the top of the blade b 22 is attached to the bottom of the scraping knife 1 above, so that a gap between the ink-removing blade part 21 and the scraping knife 1 is formed on the premise of ensuring the strength.
As shown in fig. 1 and 3, a thickened and protruding blade a 12 is formed on the end side of the ink scraping blade 11, and the blade a 12 and the blade b 22 are correspondingly provided with mounting holes 221, and the corresponding tool rest 4 is also provided with corresponding through holes for the bolt to pass through and fix; and the knife rest 4 is correspondingly provided with a knife pad 3, in the embodiment, the knife pad is only arranged at the bottom, and in the actual selection, the knife pads can be arranged at the top, the bottom and the space among the knife bodies of the knife rest.
In addition, an elastic piece 5 is arranged between the edge part position of the lower cutter and the upper cutter so as to form buffer protection on the edge part; specifically, a fitting groove 211 is formed at a position corresponding to a surface between the lower doctor blade 11 and the upper blade a (b), and the elastic member 5 is disposed in the fitting groove 211, in this example, the elastic member 5 is a spring fitted into the fitting groove 211 in a compressed state.
Referring to fig. 4-5, considering that ink is piled under the edge part during scraping, the edge part of the lower cutter is disposed obliquely toward the edge part of the upper cutter so that it better destroys the piled ink during vibration.
Specifically, the upper surface and the lower surface of the blade b 21 of the ink-picking knife 2 are respectively attached with knife pads 3 with inclined end surfaces, so that the ink-picking blade part 21 is slightly tilted upwards, and the inclination angle is set to be 1-8 degrees.
In the present application, the structures and the connection relations that are not described in detail are all the prior art, and the structures and the principles thereof are known in the prior art and are not described herein again.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A doctor blade for gravure printing, characterized in that: the printing ink scraping device comprises a scraping knife and an ink removing knife attached to the bottom of the scraping knife, wherein the number of the ink removing knives is not less than one, the scraping knife and the ink removing knife are assembled in a knife rest, and the edge part of an ink scraping blade of the scraping knife is attached to the surface of a printing plate roller; the edge part of the ink picking knife end side for scraping ink has a certain distance with the surface of the printing plate roller, and the distance is increased in a gradient manner so as to scrape partial ink on the surface of the printing plate roller and reduce the ink accumulation thickness when the scraping knife scrapes ink; and a certain gap is formed between the ink scraping edge part of the ink scraping knife and the ink scraping edge part of the upper knife so as to generate swing to break away the ink accumulated below the scraping edge part.
2. The doctor blade for intaglio printing according to claim 1, wherein: the scraping knife end side is formed with an ink scraping edge part to be arranged in a manner of being attached to the printing plate roller, and the ink picking knife end side is formed with an ink picking edge part.
3. The doctor blade for intaglio printing according to claim 2, wherein: the side of the ink-removing edge part is formed with a knife body b which is thicker than the edge part and protrudes out of the ink-removing edge part, and the top of the knife body b is attached to the bottom of the upper knife.
4. The doctor blade for intaglio printing according to claim 3, wherein: a blade a is formed on the end of the ink scraping blade and is thickened and protruded.
5. The doctor blade for intaglio printing according to claim 4, wherein: the cutter body a and the cutter body b are correspondingly provided with assembling holes, and the corresponding cutter frame is also provided with corresponding through holes for the bolts to penetrate and fix.
6. The doctor blade for intaglio printing according to claim 1, wherein: a knife pad is arranged in the knife rest.
7. The doctor blade for intaglio printing according to any one of claims 1 to 6, wherein: an elastic piece is arranged between the position of the blade part of the lower cutter and the upper cutter so as to form buffer protection on the blade part.
8. The doctor blade for intaglio printing according to claim 7, wherein: an assembly groove is formed in the surface corresponding position between the lower cutter blade part and the upper cutter body, and the elastic piece is arranged in the assembly groove.
9. The doctor blade for intaglio printing according to claim 8, wherein: the edge of the lower cutter is arranged obliquely towards the edge of the upper cutter, so that the stacked ink is better damaged in the vibration process.
10. The doctor blade for intaglio printing according to claim 9, wherein: the upper surface and the lower surface of the blade b of the ink-removing knife are respectively provided with a knife pad with an inclined end face in an attaching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949021.2A CN115320222A (en) | 2022-08-09 | 2022-08-09 | Doctor blade for gravure printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949021.2A CN115320222A (en) | 2022-08-09 | 2022-08-09 | Doctor blade for gravure printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115320222A true CN115320222A (en) | 2022-11-11 |
Family
ID=83921041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210949021.2A Pending CN115320222A (en) | 2022-08-09 | 2022-08-09 | Doctor blade for gravure printing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115320222A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07101035A (en) * | 1993-10-01 | 1995-04-18 | Toppan Printing Co Ltd | Method and machine for intaglio printing |
| JP2004050453A (en) * | 2002-07-17 | 2004-02-19 | National Printing Bureau | Doctor device for gravure printing press and gravure printing method |
| US20130047876A1 (en) * | 2011-08-30 | 2013-02-28 | Samsung Electro-Mechanics Co., Ltd. | Doctor blade apparatus and printing method using the same |
| CN203254758U (en) * | 2013-05-13 | 2013-10-30 | 艾捷舒尔物德包装（广州）有限公司 | Gravure double-scraper device |
| CN104608488A (en) * | 2015-01-15 | 2015-05-13 | 长兴艾飞特塑料科技有限公司 | Ink scraping structure of oil printing equipment |
| CN208774227U (en) * | 2018-08-23 | 2019-04-23 | 衡水天威印刷有限公司 | A kind of adjustable ink-scraping device of intaglio printing |
| CN210940953U (en) * | 2019-07-31 | 2020-07-07 | 东莞市润信环保包装科技有限公司 | Paperboard printing device with ink distributing structure |
| CN213767665U (en) * | 2020-09-23 | 2021-07-23 | 武汉楚商印务有限公司 | Scraper device of printing machine |
| CN215792587U (en) * | 2021-01-06 | 2022-02-11 | 上海策力实业有限公司 | Double-edged knife for pad printing |
-
2022
- 2022-08-09 CN CN202210949021.2A patent/CN115320222A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07101035A (en) * | 1993-10-01 | 1995-04-18 | Toppan Printing Co Ltd | Method and machine for intaglio printing |
| JP2004050453A (en) * | 2002-07-17 | 2004-02-19 | National Printing Bureau | Doctor device for gravure printing press and gravure printing method |
| US20130047876A1 (en) * | 2011-08-30 | 2013-02-28 | Samsung Electro-Mechanics Co., Ltd. | Doctor blade apparatus and printing method using the same |
| CN203254758U (en) * | 2013-05-13 | 2013-10-30 | 艾捷舒尔物德包装（广州）有限公司 | Gravure double-scraper device |
| CN104608488A (en) * | 2015-01-15 | 2015-05-13 | 长兴艾飞特塑料科技有限公司 | Ink scraping structure of oil printing equipment |
| CN208774227U (en) * | 2018-08-23 | 2019-04-23 | 衡水天威印刷有限公司 | A kind of adjustable ink-scraping device of intaglio printing |
| CN210940953U (en) * | 2019-07-31 | 2020-07-07 | 东莞市润信环保包装科技有限公司 | Paperboard printing device with ink distributing structure |
| CN213767665U (en) * | 2020-09-23 | 2021-07-23 | 武汉楚商印务有限公司 | Scraper device of printing machine |
| CN215792587U (en) * | 2021-01-06 | 2022-02-11 | 上海策力实业有限公司 | Double-edged knife for pad printing |
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