CN114193905B

CN114193905B - Novel engraving process for plate roller

Info

Publication number: CN114193905B
Application number: CN202111547224.0A
Authority: CN
Inventors: 史天勇; 崔石磊
Original assignee: Guangdong Shangyun Laser Technology Co ltd
Current assignee: Guangdong Shangyun Laser Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2023-05-02
Anticipated expiration: 2041-12-16
Also published as: CN114193905A

Abstract

The invention relates to the technical field of plate roller production, in particular to a novel plate roller engraving process, which comprises the following steps: acquiring a plate roller main body to be engraved; engraving female dots on the outer wall of the printing roller main body according to a preset dot spelling pattern in a laser engraving mode; carving oblique line angle, pulse length and FOC vector control parameters are preset, and a positive carving part of a female screen point is carved on the outer wall of the plate roller main body; setting LAC parameters and DC parameters, and engraving negative engraving parts of the female dots; adjusting the smoothness of the bottom of the female screen point through adjusting the laser emission angle of the engraving machine; polishing the surface of the engraved plate roller body by using a diamond polishing belt; and cleaning the plate roller main body after polishing treatment by using a cleaning machine. The net points are uniformly distributed and have good smoothness, so that the plate roller is not easy to block, the ink carrying quantity is stable, the engraving speed is high, the engraving range is wide, and the ink carrying quantity adjusting range is wide.

Description

Novel engraving process for plate roller

Technical Field

The invention relates to the technical field of plate roller production, in particular to a novel plate roller engraving process.

Background

In the printing field, the prior negative screen point of the plate roller is mainly engraved by using an editing mode, the main processing range is 100 LPI-300 LPI, the LPI is the resolution, a screen is arranged at equal intervals on each inch, in the traditional commercial printing plate making process, a screen is needed to be added in front of an original image, the screen consists of grid-shaped transparent and opaque equal screen wires, namely a grating, the screen wires are used for cutting a light anatomical image, due to the physical characteristics of diffraction, after light passes through the screen wires, the points with different sizes reflecting the image change of the original image are formed, the points are halftone points, the maximum area of one halftone point cannot exceed one grid, and the more the screen wires, the more the layers of the image are represented, the better the image quality is. However, when the mesh number is low, the mesh point cannot be formed due to high energy requirement, and when the mesh number is high, the mesh wall is thick, the proportion is high, the mesh point is easy to block, and the leveling effect is poor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a novel engraving process for the plate roller, which has the advantages of uniform distribution of net points and good smoothness, so that the plate roller is not easy to block, the ink carrying quantity is stable, the engraving speed is high, the engraving range is wide, and the ink carrying quantity adjusting range is wide.

In order to achieve the above purpose, the novel engraving process of the plate roller comprises the following steps: acquiring a plate roller main body to be engraved; engraving female dots on the outer wall of the printing roller main body according to a preset dot spelling pattern in a laser engraving mode; carving oblique line angle, pulse length and FOC vector control parameters are preset, and a positive carving part of a female screen point is carved on the outer wall of the plate roller main body; setting LAC parameters and DC parameters, and engraving negative engraving parts of the female dots; adjusting the smoothness of the bottom of the female screen point through adjusting the laser emission angle of the engraving machine; polishing the surface of the engraved plate roller body by using a diamond polishing belt; and cleaning the plate roller main body after polishing treatment by using a cleaning machine.

Preferably, the carving oblique line angle is 45-135 degrees, the pulse length is 20-50 ms, and the FOC vector control parameter is 9.2-10.5.

Preferably, the LAC parameter is 3 and the DC parameter is 10-13.

Preferably, the laser emission angle is 16.1 ° to 21.9 °.

Preferably, the mesh point is formed by uniformly arranging a plurality of mesh walls, and meshes for loading ink are formed between the adjacent mesh walls.

Preferably, the net walls are arranged in a matrix mode, and the net holes are in a square structure.

Preferably, the net wall is of a cylindrical structure or a truncated cone structure.

Preferably, the mesh has a depth in the range of 2.1 to 2.8 filaments.

The invention has the beneficial effects that: compared with the prior art, the invention has the following advantages:

1. the plate roller is not easy to block, and the inner wall of the net point is smooth;

2. compared with the original screen point 100-300LPI processing range, the engraving range is wider, and the screen point with 70-1000LPI can be engraved;

3. the ink carrying quantity adjusting range is wide, and is enlarged by 20% compared with the existing process adjusting range;

4. the engraving speed is improved by 20 percent.

Drawings

FIG. 1 is a block diagram of the process flow of the present invention.

Fig. 2 is a schematic diagram of the dot pattern of the present invention under a high definition microscope.

Fig. 3 is a schematic diagram of a prior art dot under a high definition microscope.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

The invention discloses a novel engraving process of a plate roller, which comprises the following steps of: acquiring a plate roller main body to be engraved; engraving female dots on the outer wall of the printing roller main body according to a preset dot spelling pattern in a laser engraving mode; carving oblique line angle, pulse length and FOC vector control parameters are preset, and a positive carving part of a female screen point is carved on the outer wall of the plate roller main body; setting LAC parameters and DC parameters, and engraving negative engraving parts of the female dots; adjusting the smoothness of the bottom of the female screen point through adjusting the laser emission angle of the engraving machine; polishing the surface of the engraved plate roller body by using a diamond polishing belt; and cleaning the plate roller main body after polishing treatment by using a cleaning machine.

A screen dot in the range of 70LPI to 1000LPI may be engraved, as illustrated by the 500LPI screen dot,

further, the carving oblique line angle is 45-135 degrees, the pulse length is 20-50 ms, and the FOC vector control parameter is 9.2-10.5. Specifically, when the angle of the carving oblique line is set to 90 degrees, the pulse length is 30ms, the FOC vector control parameter is 9.5, the carving oblique line is perpendicular to the central axis of the plate roller main body so as to be convenient for carving the net wall with the cylindrical structure, however, the angle can be changed according to the requirement, the application range is wide, and when the angle of the carving oblique line is set to 120 degrees, the pulse length is 30ms, the FOC vector control parameter is 9.5 so as to be convenient for carving the net wall with the circular truncated cone structure.

Further, the LAC parameter is 3, the DC parameter is 10-13, specifically, as preferable, the LAC parameter is adjusted to 3, the DC parameter is adjusted to 12, in this case, the interaction between the FOC vector control parameter and the LAC parameter can obtain a spot with the best carving effect, and the ceramic is gasified fully, so that the mesh point with the smoothest mesh bottom is carved, and the carving speed is greatly improved.

Further, the laser emission angle is 16.1-21.9 degrees. Specifically, the laser emission angle is preferably 20.5 °, and the emission angle is preferably.

The invention has the advantages of uniform distribution of the dots, good smoothness, difficult blockage of the plate roller, stable ink carrying capacity, high engraving speed, wide engraving range and wide ink carrying capacity adjusting range.

The mesh point of this embodiment is formed by a plurality of net walls evenly arranged, and constitute the mesh that is used for loading printing ink between the adjacent net wall. Specifically, the engraving process adopts a female screen dot, a plurality of screen walls are uniformly arranged to form a plurality of meshes, the areas of the plurality of meshes for loading ink are large, the ink loading capacity of printing is improved, and the ink loading capacity is large.

The net walls of the embodiment are arranged in a matrix mode, and the net holes are in a square structure. Specifically, a plurality of net walls are regularly and neatly arranged, breaks through the prior irregular and disordered arrangement, has compact and stable structure, increases the ink carrying capacity, and further improves the printing work efficiency.

The net wall of the embodiment is of a cylindrical structure or a truncated cone-shaped structure. Specifically, the structure is regular, the structural stability is good, and the service life is long.

The mesh depth of this example ranged from 2.1 to 2.8 filaments. Specifically, the depth of the mesh is shallow, preferably 2.5 wires, and 1 mm equals 100 wires, which is helpful for cleaning treatment and keeps the cleanliness of the mesh.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. The novel engraving process of the plate roller is characterized by comprising the following steps of:

acquiring a plate roller main body to be engraved;

engraving female dots on the outer wall of the printing roller main body according to a preset dot spelling pattern in a laser engraving mode;

the mesh points are formed by uniformly arranging a plurality of mesh walls, meshes for loading ink are formed between adjacent mesh walls, the mesh walls are arranged in a matrix mode, and the meshes are in a square structure;

the net wall is of a cylindrical structure or a truncated cone-shaped structure;

carving oblique line angle, pulse length and FOC vector control parameters are preset, and a positive carving part of a female screen point is carved on the outer wall of the plate roller main body;

the carving oblique line angle is 45-135 degrees, the pulse length is 20-50 ms, and the FOC vector control parameter is 9.2-10.5;

setting LAC parameters and DC parameters, and engraving negative engraving parts of the female dots;

the LAC parameter is 3, and the DC parameter is 10-13;

the smoothness of the bottom of the female mesh point is adjusted by adjusting the laser emission angle of the engraving machine, wherein the laser emission angle is 16.1-21.9 degrees;

polishing the surface of the engraved plate roller body by using a diamond polishing belt;

and cleaning the plate roller main body after polishing treatment by using a cleaning machine.

2. The novel engraving process of claim 1, wherein: the mesh depth ranges from 2.1 to 2.8 filaments.