CN112026340A

CN112026340A - Printing roller adopting irregular dots and printing roller engraving process

Info

Publication number: CN112026340A
Application number: CN202011057035.0A
Authority: CN
Inventors: 淮登顺
Original assignee: Shanghai Yunshen Plate Mould Co ltd
Current assignee: Shanghai Yunshen Plate Mould Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-04

Abstract

The invention relates to a printing roller adopting irregular net points and a printing roller engraving process, wherein the leather printing roller comprises a printing roller main body, the outer wall of the printing roller main body is provided with the negative net points, each negative net point is formed by arranging a plurality of net walls, meshes are formed between every two adjacent net walls, the cross sections of the net walls are irregular in shape, and the depth of the meshes is within the range of 2-3 silks. Compared with the prior art, the invention has the advantages of avoiding the generation of printing reticulate patterns, reducing the discharge of VOC (volatile organic compounds) in printing, thickening the ink layer of a printed product, improving the efficiency and the like.

Description

Printing roller adopting irregular dots and printing roller engraving process

Technical Field

The invention relates to the technical field of printing, in particular to a printing plate roller adopting irregular net points and a plate roller engraving process.

Background

In daily life, people have higher and higher demands for leather products, including: cases, footwear, clothing, automobile leather, and the like. Because of receiving the influence of various factors, the genuine leather product can be less and less, and relative synthetic leather and synthetic leather product can be more and more, and the processing technology of synthetic leather and synthetic leather product is very complicated again, and receives the restriction of conditions such as environmental protection, and this just needs to carry out the essence to processing technology and subtracts, and the processing link is makeed to reduce as far as possible, raises the efficiency and qualification rate. Coating printing of artificial leather and synthetic leather is an important link, and in order to achieve the thickness and the adhesive force of the coating, the requirement can be met through multiple times of printing;

the reason is that regular reticulate patterns appear in the printing process, the thickness and the adhesive force of the coating are influenced, the requirements on the thickness and the adhesive force of the coating can be met only by increasing the printing times, the processing links are increased, and the printing efficiency and the qualified rate are influenced.

The regular reticulate patterns are formed because the mesh points used in the existing laser plate making are mostly diamond, quadrilateral, hexagonal and other common mesh points with limitations, and when printing is carried out on artificial leather and synthetic leather, the patterns can appear, and the regular reticulate patterns are formed.

Disclosure of Invention

The invention aims to overcome the defects that regular reticulate patterns appear in the printing process and the printing efficiency and the qualified rate are influenced in the prior art, and provides a printing plate roller adopting irregular reticulate patterns and a plate roller engraving process.

The purpose of the invention can be realized by the following technical scheme:

a printing roller adopting irregular net points comprises a printing roller main body, wherein the outer wall of the printing roller main body is provided with a negative net point, the negative net point is formed by arranging a plurality of net walls, net holes are formed between the adjacent net walls, and the cross sections of the net walls are irregular in shape;

specifically, the net wall comprises an irregular net wall top surface and a net wall slope, the net wall top surface is connected with the roller main body through the net wall slope, and the irregular net wall top surface is in a random geometric shape.

Further, the top surface of the net wall is in an oval shape with concave and convex edges.

Further, the concave parts and the convex parts of the concave-convex edge are randomly distributed, and the sizes of the concave parts and the convex parts of the concave-convex edge are random.

Furthermore, the net wall is of an irregular curved surface three-dimensional structure.

Further, the top end area of the net wall is smaller than the bottom end area.

Further, the depth of the mesh is in the range of 2 to 3 filaments.

Further, the walls and the meshes of the outer wall of the plate roller main body are provided with irregular-shaped edges formed by laser corrosion.

Further, the mesh openings between the walls may form a convection.

Further, the printing plate roller adopting the irregular dots is used in a coating printing process of artificial leather and synthetic leather.

The invention also provides a plate roller engraving process adopting the irregular net points, which comprises the following steps:

s1: acquiring a plate roller main body to be engraved;

s2: carving a negative screen point in the outer wall of the printing roller main body in a laser corrosion carving mode according to a preset screen point mosaic plate, wherein the negative screen point is formed by arranging a plurality of screen walls, meshes are formed between every two adjacent screen walls, and the shape of each screen wall is irregular;

s3: and acquiring the engraved plate roller main body.

Further, in step S2, a halftone dot is engraved in the outer wall of the plate roll main body by laser etching engraving.

Further, in step S2, the depth of the mesh is in the range of 2 to 3 filaments.

Further, the plate roll main body obtained in step S3 is used in a coating printing process of artificial leather and synthetic leather.

Compared with the prior art, the invention has the following advantages:

(1) the generation of printing reticulate patterns is avoided; the electric carving mode is changed into the laser corrosion carving mode, so that the coating amount in the printing process is increased, and the regular reticulate patterns in the printing process are avoided; irregular mesh points adopted by the laser engraving mesh points further ensure that regular reticulate patterns cannot be generated.

(2) VOC emission is reduced in printing; the depth of the printing plate is about 2-3 threads, the depth is shallow, and excessive solvents such as diluents and the like cannot be added into printing ink in printing, so that the discharge of VOC (volatile organic compounds) is reduced.

(3) The printed matter ink layer is thick and solid; the process adopts a negative dot process, and the printed ink has high expansion rate and thick and solid ink layer.

(4) The efficiency is improved; as the ink layer is thick and solid, the reticulate pattern is avoided in the printing process, the printing times are reduced, and the efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of a printing plate roller using irregular dots according to the present invention;

FIG. 2 is a schematic view of a dot under a 10-fold microscope after a printing plate roller is subjected to laser corrosion in embodiment 1 of the present invention;

in the figure, 1, a plate roller main body, 2, a dot area, 21, a net wall top surface, 22, a net wall slope, 23 and a mesh.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

The embodiment provides a printing roller adopting irregular net points, which comprises a roller main body, wherein the outer wall of the roller main body is provided with the negative net points, each negative net point is formed by arranging a plurality of net walls, meshes are formed between every two adjacent net walls, the cross sections of the net walls are irregular in shape, specifically, each net wall comprises an irregular net wall top surface 21 and a net wall slope 22, the net wall top surfaces 21 are connected with the roller main body 1 through the net wall slopes 22, and the irregular net wall top surfaces 21 are in random geometric shapes.

The net wall top surface 21 is oval-shaped with concave and convex edges. The concave parts and the convex parts of the concave-convex edge are randomly distributed, and the sizes of the concave parts and the convex parts of the concave-convex edge are random.

The net wall is in an irregular curved surface three-dimensional structure, and the section of the net wall is an irregular curved surface. The area of the top end of the net wall is smaller than that of the bottom end. The depth of the mesh is in the range of 2 to 3 filaments, 1 mm being equal to 100 filaments.

The walls and the meshes of the outer wall of the plate roller main body are provided with irregular edges formed by laser corrosion. The mesh between the walls can form convection.

The embodiment also provides a plate roller engraving process adopting irregular screen dots, which comprises the following steps:

s1: acquiring a plate roller main body 1 to be engraved;

s2: carving a mesh point in the outer wall of the printing roller main body 1 in a laser corrosion carving mode according to a preset mesh point mosaic plate;

s3: and obtaining the plate roller main body 1 subjected to laser corrosion engraving, and using the plate roller main body in a coating printing process of artificial leather and synthetic leather.

In step S2, the process is based on the artificial leather and synthetic leather processing process, firstly, the gravure processing process is changed into the laser etching mode from the electric carving mode, so that the coating amount in the printing process is increased, and the regular reticulate patterns in the printing process are avoided.

Further, in order to solve the reticulate pattern appearing in the printing process of the artificial leather and the synthetic leather, the gravure processing technology of the technology is adjusted to be irregular lattice points from the traditional laser lattice points. The shape of the mesh points is irregular and can be called as rice-shaped mesh points. The irregular net points are formed by a plurality of irregular net walls.

Furthermore, in order to improve the coating thickness of artificial leather and synthetic leather and reduce the generation of reticulate patterns in printing, intaglio laser engraving dots of the process are changed into negative dots, so that the printing inking amount is improved; the detailed description of the halftone dots may refer to the description in utility model publication No. CN 210680097U.

The depth of the printing plate is shallow, and the depth is about 2-3 silks generally.

As shown in fig. 1, the plate roll manufactured by the plate roll engraving process includes a plate roll main body 1, and a dot region 2 is formed on an outer surface of a middle portion of the plate roll main body 1.

As shown in fig. 2, the dot areas 2 are formed by raised walls and recessed mesh openings 23, the walls including irregular wall tops 21 and wall slopes 22, the wall tops 21 being connected to the roll body 1 by the wall slopes 22.

Example 2

This example is substantially the same as example 1, except that the mesh depth was 2 filaments.

Example 3

This example is substantially the same as example 1, except that the mesh depth was 3 filaments.

Example 4

This example is substantially the same as example 1, except that the mesh depth was 2.5 filaments.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A printing plate roller adopting irregular net points comprises a plate roller main body (1), the outer wall of the plate roller main body (1) is provided with the negative net points, the negative net points are formed by arranging a plurality of net walls, and net holes are formed between the adjacent net walls, and the printing plate roller is characterized in that the cross sections of the net walls are irregular in shape,

specifically, the net wall comprises an irregular net wall top surface (21) and a net wall slope (22), the net wall top surface (21) is connected with the plate roller main body (1) through the net wall slope (22), and the irregular net wall top surface (21) is in a random geometric shape.

2. Printing roller with irregular dots according to claim 1, characterized in that the top surface (21) of the web is oval with concave and convex edges.

3. The printing plate roller with irregular dots according to claim 2, wherein the concave parts and the convex parts of the concave-convex edges are randomly distributed, and the sizes of the concave parts and the convex parts of the concave-convex edges are random.

4. The printing plate roll with irregular dots according to claim 1, wherein the depth of the mesh openings is in the range of 0.02 to 0.03 mm.

5. The printing plate roller with irregular dots according to claim 1, wherein the walls and the holes of the outer wall of the main body of the printing plate roller are provided with irregular shaped edges formed by laser etching.

6. The printing plate roller adopting irregular dots is characterized in that the printing plate roller adopting the irregular dots is used in a coating printing process of artificial leather and synthetic leather.

7. A plate roller engraving process adopting irregular net points is characterized by comprising the following steps:

s1: acquiring a plate roller main body to be engraved;

s3: and acquiring the engraved plate roller main body.

8. The printing roll engraving process for descreening according to claim 7, wherein in the step S2, the negative screen dots are engraved in the outer wall of the printing roll main body by means of laser corrosion engraving.

9. The engraving process for printing roll with irregular net points as claimed in claim 7, wherein in step S2, the depth of the net holes is in the range of 2 to 3 filaments.

10. The plate roll engraving process using irregular dots according to claim 7, wherein the plate roll body obtained in the step S3 is used in a coating printing process of artificial leather and synthetic leather.