CN112937074B - Engraving method of gravure roller - Google Patents
Engraving method of gravure roller Download PDFInfo
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- CN112937074B CN112937074B CN202110133587.3A CN202110133587A CN112937074B CN 112937074 B CN112937074 B CN 112937074B CN 202110133587 A CN202110133587 A CN 202110133587A CN 112937074 B CN112937074 B CN 112937074B
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- engraving
- gravure
- roller
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- gravure roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/02—Engraving; Heads therefor
- B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
- B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
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- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention discloses a method for engraving a gravure roller, which comprises the following steps: obtaining bands of a target engraving imageDepth plane coordinate A with depth carving pointi(xi,yi,hi) (ii) a According to the strip depth plane coordinate Ai(xi,yi,hi) Obtaining the roller position coordinates B of each deep carving point of the target carving image on the gravure rolleri(Xi,θi,Hi) (ii) a According to the roller position coordinates Bj(xj,θj,hj) And controlling three parameters of the movement position of the laser engraving head, the rotation angle of the gravure roller and the laser engraving depth, and performing laser engraving on the gravure roller. According to the invention, the engraving depth on the gravure roller is corrected, so that the problem of poor printing effect caused by too small ink content during printing due to too small engraving depth of the gravure roller in the engraving process is effectively prevented.
Description
Technical Field
The invention relates to the technical field of gravure rollers, in particular to a method for engraving a gravure roller.
Background
The printing technology of the gravure roller is a printing technology which is frequently used at present, and occupies an important share in the whole printing industry of China. Particularly, the printing method has the performance and cost advantages that other printing modes cannot replace the printing method in the packaging field of the printing industry. The printed product manufactured by the gravure printing technology has the advantages of thick ink layer, bright color, regular distribution, perfect original manuscript restoring effect and the like.
The design pattern is carved on the cylindrical surface of the gravure roller, the carving pattern is provided with a carving depth which is the carving depth on the two-dimensional plane, and because the gravure roller is a cylinder, if the carving depth is set on the two-dimensional plane, the ink content of the pattern is less than the preset ink content during printing, so that the ink content of the printed pattern is too little, and the printing effect is influenced.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a method for engraving a gravure roller, and aims to solve the problems that the engraving depth of the gravure roller is too small and the ink content is too small during printing, so that the printing effect is poor.
In order to achieve the above object, the present invention provides a method for engraving a gravure roll, the method comprising the steps of:
step S1, obtaining depth plane coordinate A of each depth carving point of the target carving imagei(xi,yi,hi) (ii) a Wherein i is the number of the point with the depth engraving, i is a positive integer, and the number of the first position corresponding to the initial engraving point is used as the number of the point with the depth engravingThe first coordinate is A1(x1,y1,h1) The more backward numerical value of the serial number with the deep engraving points is larger; h isiThe carving depth of the carving points with the depth is obtained; the laser engraving device comprises a gravure roller, a laser engraving head and a rotary driving motor, wherein the laser engraving head is arranged above the gravure roller, the axis of the gravure roller is connected with the rotary driving motor, the laser engraving head is used for moving along the axial direction of the gravure roller so as to perform laser engraving on the gravure roller, and the rotary driving motor is used for rotating the gravure roller so as to perform laser engraving;
step S2, according to the strip depth plane coordinate Ai(xi,yi,hi) Obtaining the roller position coordinate B of each deep carving point of the target carving image on the intaglio rolleri(Xi,θi,Hi) (ii) a The axial length of the gravure roller is greater than the transverse plate width of the target engraving image, the perimeter of the gravure roller is greater than the longitudinal plate width of the target engraving image, and a second coordinate of a second position of the initial engraving point on the gravure roller is taken as B1(X1,θ1,H1) The more backward numerical value of the serial number with the deep engraving points is larger; the strip depth plane coordinate Ai(xi,yi,hi) And the roller position coordinates Bi(Xi,θi,Hi) Satisfies the following conditions:
the r is the radius of the gravure roller; said XiThe transverse coordinate is along the axial direction of the gravure roller; theta is describediIs a rotation angle coordinate around the circumferential direction of the gravure roller; said HiThe engraving depth of the deep engraving points on the gravure roller is set;
step S3, according to the roller position coordinate Bi(Xi,θi,Hi) Controlling the movement position of the laser engraving head, the rotation angle of the gravure roller and the laserAnd engraving depth parameters, and performing laser engraving on the gravure roller.
In the technical scheme, the engraving depth of the target engraving image on the gravure roller is obtained by obtaining the engraving depth of the target engraving image, and the engraving depth of the target engraving image on the gravure roller is obtained according to the engraving depth of the target engraving image, wherein the engraving depth of the target engraving image on the gravure roller is the corrected engraving depth; through right the sculpture degree of depth on the gravure roller is corrected, effectively prevents gravure roller at the sculpture in-process, and the sculpture degree of depth undersize leads to the ink content when printing too little to the not good problem of printing effect that arouses.
In a specific embodiment, the laser engraving head is directed towards the gravure roll axis.
In a specific embodiment, the rotation angle of the gravure roll is the rotation angle coordinate θ around the circumferential direction of the gravure rolli。
In a specific embodiment, the longitudinal starting point and the longitudinal ending point of the engraved image of the target coincide on the gravure roll.
In a specific embodiment, the longitudinal starting point and the longitudinal ending point of the engraved image of the target leave a gap on the gravure roll.
In the technical scheme, the gap is reserved, so that the printed pattern can be conveniently cut.
In another embodiment, the gap is used to mark time and engraving information, etc. on the gravure roll.
In one embodiment, the resolution of the target engraving image is 150-1000 dpi.
In one embodiment, each of the deeply engraved spots forms a coherent groove on the gravure roll.
In another specific embodiment, the laser engraving head engraves line by line along the circumferential direction of the gravure roll.
The invention has the beneficial effects that: in the invention, the engraving depth of the target engraving image is obtained, and the engraving depth of the target engraving image on the gravure roller is obtained according to the engraving depth of the target engraving image, wherein the engraving depth of the target engraving image on the gravure roller is the corrected engraving depth; through right the sculpture degree of depth on the gravure roller is corrected, effectively prevents gravure roller at the sculpture in-process, and the sculpture degree of depth undersize leads to the ink content when printing too little to the not good problem of printing effect that arouses.
Drawings
Fig. 1 is a block flow diagram of a method for engraving a gravure roll according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the engraving depth of the gravure roll in accordance with one embodiment of the present invention;
FIG. 3 is a diagram illustrating the positional relationship between a gravure roll and a laser engraving head in accordance with one embodiment of the present invention;
fig. 4 is a two-dimensional pattern transfer of an engraved image of a target in accordance with an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1-4, in a specific embodiment of the present invention, there is provided a method of engraving a gravure roll 100, the method comprising the steps of:
step S1, obtaining depth plane coordinate A of each depth carving point of the target carving imagei(xi,yi,hi) (ii) a Wherein i is the number of the engraved point with depth, i is a positive integer, and a first coordinate of a first position corresponding to the initial engraved point is A1(x1,y1,h1) The more backward numerical value of the serial number with the deep engraving points is larger; h isiThe carving depth of the carving points with the depth is obtained; gravure roller 100 top is provided with laser engraving head 200, gravure roller axis is connected with rotary drive motor, laser engraving head 200 is used for following gravure roller 100's axial is moved so that right gravure roller 100 carries out laser engraving, rotary drive motor is used for rotatory gravure roller 100 is with order toLaser engraving is carried out;
step S2, according to the strip depth plane coordinate Ai(xi,yi,hi) Obtaining the roller position coordinates B of each deeply engraved point of the target engraved image on the gravure roller 100i(Xi,θi,Hi) (ii) a The axial length of the gravure roller 100 is greater than the horizontal version of the target engraved image, the perimeter of the gravure roller 100 is greater than the longitudinal version of the target engraved image, and a second coordinate of a second position of the initial engraved point on the gravure roller 100 is taken as B1(X1,θ1,H1) The more backward numerical value of the serial number with the deep engraving points is larger; the strip depth plane coordinate Ai(xi,yi,hi) And the roller position coordinates Bi(Xi,θi,Hi) Satisfies the following conditions:
r is the radius of the gravure roll 100; said XiIs a transverse coordinate along the axial direction of the gravure roll 100; theta is describediIs a rotation angle coordinate around the circumferential direction of the gravure roll 100; said HiThe engraving depth of the deep engraving points on the gravure roller 100 is shown;
step S3, according to the roller position coordinate Bi(Xi,θi,Hi) And controlling three parameters of the movement position of the laser engraving head 200, the rotation angle of the gravure roller 100 and the laser engraving depth, and performing laser engraving on the gravure roller 100.
In this embodiment, the laser engraving head 200 is directed towards the gravure roll axis.
In the present embodiment, the rotation angle of the gravure roll 100 is defined by the rotation angle coordinate θ around the circumferential direction of the gravure roll 100i。
In this embodiment, the longitudinal starting point and the longitudinal ending point of the target engraved image coincide on the gravure roll 100.
In this embodiment, the longitudinal start point and the longitudinal end point of the target engraved image leave a gap on the gravure roll 100.
In another embodiment, the gap is used to mark time and engraving information, etc. on the gravure roll 100.
In the present embodiment, the resolution of the target engraved image is 150 and 1000 dpi.
In this embodiment, each of the deeply engraved spots forms a coherent groove on gravure roll 100.
In another embodiment, the laser engraving head 200 engraves line by line along the circumferential direction of the gravure roll 100.
It is worth mentioning that, in general, the intrinsic depth of the engraving depth of the engraved points with depth on the gravure roll 100 is hBook (I)＝hi(ii) a If the intrinsic depth is directly adopted as the engraving depth of the engraving point with the depth on the intaglio roller 100, the sectional area of the engraving point with the depth engraving point on the intaglio roller 100 is smaller than that of the engraving point with the depth of the target engraving image; therefore, the printing quality is affected because the amount of ink is reduced during printing; therefore, the engraving depth of the deep engraving points on the gravure roller 100 needs to be corrected, that is, the engraving depth is increased; said Hi＝hi+Δhi(ii) a Wherein Δ h isiIs the correction increment of the engraving depth.
The correction method comprises the following steps:
according to the strip depth plane coordinate Ai(xi,yi,hi) Solving the standard longitudinal section area S with the deep carving pointsSign board(ii) a Wherein the standard longitudinal sectional area SSign board＝hiθir(1)；
According to the intrinsic roller position coordinate B corresponding to the intrinsic depthi(Xi,θi,hBook (I)) Solving the to-be-corrected intaglio roller 100 with the deep engraving pointsPositive longitudinal section area STo be treated；
As shown in fig. 2, the longitudinal cross-sectional area to be corrected
Simplifying to obtain:
according to the standard longitudinal section area SSign boardAnd the longitudinal section area S to be correctedTo be treatedSolving for the differential longitudinal section area SDifference (D)(ii) a Wherein the difference longitudinal section area SDifference (D)＝SSign board-STo be treated(3)；
And (1), (2) and (3) are connected to obtain:
as shown in figure 2 of the drawings, in which,
the simultaneous (4) and (5) are simplified to obtain: corrected increment of engraving depth
Thus it is possible to
Specific embodiments of the present invention have been described above in detail. It is to be understood that the specific embodiments of the present invention are not exclusive and that modifications and variations may be made by those skilled in the art, consistent with the principles of the present invention, within the scope of the appended claims. Therefore, technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the embodiments of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A method for engraving a gravure roll is characterized by comprising the following steps:
step S1, obtaining depth plane coordinate A of each depth carving point of the target carving imagei(xi,yi,hi) (ii) a Wherein i is the number of the carving point with depth, i is a positive integer, and a first coordinate of a first position corresponding to the initial carving point is A1(x1,y1,h1) The more backward numerical value of the serial number with the deep engraving points is larger; h isiThe carving depth of the carving points with the depth is obtained; the laser engraving device comprises a gravure roller, a laser engraving head and a rotary driving motor, wherein the laser engraving head is arranged above the gravure roller, the axis of the gravure roller is connected with the rotary driving motor, the laser engraving head is used for moving along the axial direction of the gravure roller so as to perform laser engraving on the gravure roller, and the rotary driving motor is used for rotating the gravure roller so as to perform laser engraving;
step S2, according to the strip depth plane coordinate Ai(xi,yi,hi) Obtaining the roller position coordinate B of each deep carving point of the target carving image on the intaglio rolleri(Xi,θi,Hi) (ii) a The length of the shaft of the gravure roller is greater than or equal to the transverse plate width of the target engraving image, the circumference of the gravure roller is greater than or equal to the longitudinal plate width of the target engraving image, and a second coordinate of a second position of the initial engraving point on the gravure roller is taken as B1(X1,θ1,H1) The more backward numerical value of the serial number with the deep engraving points is larger; the strip depth plane coordinate Ai(xi,yi,hi) And the roller position coordinates Bi(Xi,θi,Hi) Satisfies the following conditions:
the r is the radius of the gravure roller; said XiIs transverse to the axial direction of the gravure rollerTo the coordinate; theta is describediIs a rotation angle coordinate around the circumferential direction of the gravure roller; said HiThe engraving depth of the deep engraving points on the gravure roller is set;
step S3, according to the roller position coordinate Bi(Xi,θi,Hi) And controlling three parameters of the movement position of the laser engraving head, the rotation angle of the gravure roller and the laser engraving depth, and performing laser engraving on the gravure roller.
2. The method of engraving a gravure roll according to claim 1, wherein said laser engraving head is directed toward said gravure roll axis.
3. The method of engraving a gravure roll according to claim 1, wherein the magnitude of the rotation angle of said gravure roll is the rotation angle coordinate θ around the circumferential direction of said gravure rolli。
4. The method of engraving a gravure roll according to claim 1 wherein the longitudinal starting point and the longitudinal ending point of the engraved image of the target coincide on the gravure roll.
5. The method of engraving a gravure roll according to claim 1 wherein the longitudinal starting point and the longitudinal ending point of the engraved image of the target leave a gap on the gravure roll.
6. The method for engraving a gravure roll according to claim 5 wherein said gap is used to mark time and engraving information on said gravure roll.
7. The method of engraving a gravure roll as claimed in claim 1, wherein the resolution of said target engraved image is 150-.
8. A method of engraving a gravure roll according to claim 1 wherein each of said deeply engraved dots forms a coherent groove on said gravure roll.
9. The method of engraving a gravure roll according to claim 8, wherein said laser engraving head engraves line by line along said circumferential direction of said gravure roll.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110133587.3A CN112937074B (en) | 2021-02-01 | 2021-02-01 | Engraving method of gravure roller |
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| CN202110133587.3A CN112937074B (en) | 2021-02-01 | 2021-02-01 | Engraving method of gravure roller |
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| CN112937074B true CN112937074B (en) | 2022-07-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117041A (en) * | 2002-06-05 | 2008-02-06 | Kba-吉奥里股份有限公司 | Methods of making engravings |
| JP2009172922A (en) * | 2008-01-25 | 2009-08-06 | Fujifilm Corp | Printing plate making device |
| CN102529308A (en) * | 2011-12-29 | 2012-07-04 | 广东省南方彩色制版有限公司 | Manufacturing method of gravure roller capable of printing three-dimensional effect |
| CN105799306A (en) * | 2014-12-31 | 2016-07-27 | 上海运城制版有限公司 | Seamless flexible plate making technology |
| CN111812090A (en) * | 2020-06-19 | 2020-10-23 | 固高科技(深圳)有限公司 | Detection method, device, electric carving control system and computer readable storage medium |
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- 2021-02-01 CN CN202110133587.3A patent/CN112937074B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117041A (en) * | 2002-06-05 | 2008-02-06 | Kba-吉奥里股份有限公司 | Methods of making engravings |
| JP2009172922A (en) * | 2008-01-25 | 2009-08-06 | Fujifilm Corp | Printing plate making device |
| CN102529308A (en) * | 2011-12-29 | 2012-07-04 | 广东省南方彩色制版有限公司 | Manufacturing method of gravure roller capable of printing three-dimensional effect |
| CN105799306A (en) * | 2014-12-31 | 2016-07-27 | 上海运城制版有限公司 | Seamless flexible plate making technology |
| CN111812090A (en) * | 2020-06-19 | 2020-10-23 | 固高科技(深圳)有限公司 | Detection method, device, electric carving control system and computer readable storage medium |
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Effective date of registration: 20220613 Address after: 351100 room 1205, building a, Jiulong community, No. 999, lihuadong Avenue, Xialin street, Chengxiang District, Putian City, Fujian Province Applicant after: PUTIAN ZHUHUO INFORMATION TECHNOLOGY Co.,Ltd. Address before: 351100 Guoxi 100, Jiaoxi village, Huating Town, Chengxiang District, Putian City, Fujian Province Applicant before: Lin Yuanxia |
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Effective date of registration: 20240708 Address after: 844000 Factory Building 9, Yuepu Lake Industrial Park, Kashgar Economic Development Zone, Kashgar Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Yuguan Color Printing and Packaging Technology Co.,Ltd. Country or region after: China Address before: 351100 room 1205, building a, Jiulong community, No. 999, lihuadong Avenue, Xialin street, Chengxiang District, Putian City, Fujian Province Patentee before: PUTIAN ZHUHUO INFORMATION TECHNOLOGY Co.,Ltd. Country or region before: China |